samwoo anchor technology
TRANSCRIPT
SW-RCD Anchor
SW-PCD Anchor
SW-PTF Anchor
www.swanchor.com
First, we thank all of you who have cared for and encouraged SAMWOO.
SAMWOO was established on Oct. 22nd, 1993, and has continued to endeavor to become the
best company in connection to Ground Anchors. Through our consistent development of ground
anchor and various tests, we are endeavoring to enable safer and economically efficient con-
struction, based on perfect quality management.
We obtained the ISO 9001 international certificate for the first time in the nation, in the
design/production and additional services field for ground anchors. We are equipped with out-
standing R&D abilities as a small size business, having a R&D department, Venture enterprise
certificate, and INNOBIZ certificate, and became the representative company in the Korean
Anchor industry by obtaining various certifications that prove our advanced management
performance, marketability, and future potential.
SAMWOO is ceaselessly endeavoring to grow into a world class company from the
leading enterprise in the Korean anchor industry, instead of being satisfied with the pre-
sent status, through various overseas business activities, such as establishing a branch
in Vietnam and business partnerships with foreign construction companies. We are real-
izing our vision of distributing the Korean anchor technology around the world.
Everyone, including individuals and companies who conduct designing, construction, auditing,
and supervising regarding the ground anchors!
Here we are, the best for any work regarding anchors. The SAMWOO family can solve any
problems you may have. If there is a need to design and install ground anchors in the moon,
SAMWOO will take care of it.
President's Message
SAMWOO was established on Oct. 1993, and has continued to endeavor to become the best company in connection to Ground Anchors
during the past 15 years. We are producing quality anchor products, satisfying our customers, through ceaseless research development
and quality improvement efforts.
As the leading company in the Korean anchor market, SAMWOO is making all possible efforts to grow into a first class company in the
global anchor industry, never once being satisfied with the current status.
“Value proposition for the customers,” “Value reflection for the customers,” “Value realization for the customers”
SAMWOO Anchor Technology President
KIM JEONG - RYEOL
SAMWOOAnchor Technology
President's Message, Company Introduction & History
Ground AnchorIntroduction and Application of Ground Anchor Classification and Characteristics of Ground Anchor
SW-RCD Anchor SystemSW-RCD Anchor Product Information and Removal Principle SW-RCD Anchor Process and Achievement
SW-PCD Anchor SystemSW-PCD Anchor Product InformationSW-PCD Anchor Process and Achievement
SW-PTF Anchor SystemSW-PTF Anchor Product InformationSW-PTF Anchor Process and Achievement
Anchor Test, Laboratory and Quality Management
R&D, Official Certification and Rough Map
02~03
04~05
06~09
10~13
14~17
18~19
20~21
www.swanchor.com
1993. 10 Establishment of SAMWOO Engineering
Ltd.
1995. 4 Establishment of the ground anchor
system production factory
1995. 6 Establishment of SAMWOO Corporation
1997. 9 Constructed an additional ground anchor
system production line
1998. 9 Obtained venture enterprise
certificate
2000. 6 Obtained ISO 9001 certificate
2001. 5 Established research &
development department
2002. 5 Exported ground anchor system
production line (China)
2005. 3 Won the National Tax Service Director
Award
2005. 7 Constructed new factory
2005. 10 Selected as a prospective small business
2005. 11 Constructed an additional production
factory
2006. 8 Opened the branch in Vietnam
2006. 12 Obtained the technically innovative small
enterprise (INNOBIZ)
Company History
SAMWOOAnchor Technology
PermanentWall
PermanentTieback
TemporarySheeting
SoilExistingBuilding
Temporary
Tieback
TemporarySheeting
FutureStation
Tower
PermanentTiedown
ExistingDam
PermanentTiedown
Floor Slab
Tension inAnchor
Uplift
Bridgeabutment Slope
protection
Anchor
Ground AnchorGround Anchor
Ground anchor is a system that stabilizes the struc-ture against excessive transformation, or displace-ment by fixing a highly strong tension member suchas the P.C. strand to both sides of the inner groundand the structure and applying Pre-Stress. Groundanchors are widely used to stabilize structures at var-ious domestic and overseas construction and engi-neering sites with its outstanding economical qualityand constructability for the past 50 years since itscommercialization.
Application of the ground anchor - Sheeting when constructing the excavation
at a construction site - Supplementation and stabilization of the cut section
for new road construction or additional construction - Stabilization of slope- Stabilization and supplementation of stone masonry
and revetment- Lift up resistance for structures under ground water level
- Stabilization and supplementation of tunnel pit mouths- Stabilize structures and foundations against earthquakes - Stabilization of tower type structures such as steel power transmission towers - Stabilization of foundations of bridges, such as suspension bridges
Ground Anchor
Ground anchors can be classified by their types of fixation ground, installation direction, grouting method, term of usage, and supporting method.The most common classification is as shown in the table below. Based on the term of use, anchors used to temporarily support temporary wallsor grounds are called temporary anchors, and those used to resist load for long terms of two years or more, and that are related to the remainingperiod of the structure, are called permanent anchors.
Also, anchors can be classified into frictional type anchors that are supported by the friction of the grout and the ground, ground pressure typeanchors that acquire anchoring force with the passive resistance of the ground using ground pressure boards or piles, and complex type anchorsthat are a combination of the above two types, based on the supporting method of the fixation ground. Frictional type anchors can also be classi-fied into tensile type anchors and compressive type anchors based on the load application method to the grout. Lastly, compressive typeanchors can be classified into load concentrative type anchors and load distributive type anchors depending on the distribution of the load.
Classification of Ground Anchors
Application of the ground anchor
Groundanchor
Permanent anchor
Underground type anchor
Removable anchor
Tensile type anchor
Compressive type anchor Load concentrative type anchor
Load distributive type anchor
Temporary anchor
Frictional type anchor
Ground pressure type anchor
Complex type anchor
04
Classification by theterm of use
Classification based onthe supporting methodof the fixation ground
SW-RCD AnchorSW-RCD AnchorSW-RCD Anchor System
SW-RCD- 50
SW-RCD- 80
SW-RCD-110
SW-RCD-140
4
6
8
10
74.8
112.2
149.6
187.0
63.6
95.4
127.2
159.0
44.88
67.32
89.76
112.20
57.24
85.86
114.48
143.10
2
3
4
5
TypeNo. of P.C. Strand
(12.7mm)Ultimate strength
(Tus)Yield strength
(Tys)Allowable force
(0.6Tus)Jacking force
(0.9Tys)No. of
Anchor body(ea)
SW-RCD anchor's detailed part photograph
SW-RCD Anchor System Structure / Specification
06
The strong points of using anchors for constructions in urban centers include effective construction management and shortening of the construc-tion period, but this also caused serious problems, due to the difficulties in removing the tension members in later construction works or whenissuing usage permits for nearby areas. Especially, the strength per cross section of P.C. strands that are used as tension members are about sixtimes stronger than normal steel rods, which makes it very difficult to remove the stands buried in the ground, causing much loss of excavationequipments and drilling equipments due to the anchors used at the nearby construction sites. Therefore, a removable anchor was developed toenable the removal of the P.C. strands according to the construction process after completing the excavation process, which is now being widelyused.
The SW-RCD anchor system, a compressive-distributive type removable anchor that can be removed after usage, is a representative anchorproduct developed and commercialized by SAMWOO for the past years. SAMWOO had obtained numerous patents for this product, and sincethis product can be removed by man force without requiring cranes or backhoes such as the existing U-Turn anchors, it is a removable anchorsystem that is most efficient in various aspects, such as time, space and cost.
When fixing the SW-RCD anchor, the removal screw is located at the upper groove of the wedge, and the strand is completely bound atthis point.
After completing the construction and when removing the strand, the confining force is dissolved by cutting the head part of the anchor, and
strand , wedge , and removal screw has weak confining forces.
Then, by rotating strand , the removal screw moves to the removal net inside of the upper head cap, and the wedge also moves.Therefore, the strand is freed from confinement, and removed.
Removal Principle of the SW-RCD Anchor
Jacking andfixation
Strand cutting,wedge moved
Strand rotationwedge
opening
Strandremoval
Fixation Strand cutting and rotation Strand removal
SW-RCD anchor removal order
www.swanchor.com SAMWOO 07
SW-RCD anchor system, the removable anchor system that has obtained many domestic and foreign patents, was first commercial-ized in 2001, and has huge achievement which reaches 3,240,000m for the past 6 years. It is the most widely used removableanchor system in Korea.
Major Achievements on SW-RCD Anchor System in Korea
www.swanchor.com SAMWOO 09
SsangyongConstruction Co.Ltd.
Kyunghee Kung's Achim, Naesu-dong,Jongno-gu, Seoul
SK Construction,POSCO
Venture town 1, 2, Boondang,Gyeonggi-do
SK ConstructionCo.Ltd.
SK HUB SKY construction, Busan
POSCOConstruction Co.Ltd.
Starcity, Kunkook University,Gwangjin-gu, Seoul
DaewooConstruction Co.Ltd.
Project 901, Subway line 9, Seoul
Lotte ConstructionCo.Ltd.
Lotte Mixed-use Apartment,Hwanghak-dong, Seoul
POSCOConstruction Co.Ltd.
Dongbaek Juneve Shopping Mall,Yongin, Gyeonggi-do
Lotte ConstructionCo.Ltd.
Citypark, Yongsan, Seoul
DaewooConstruction Co.Ltd.
Daewoo Apartment, Shindorim, Seoul
Daelim/Hyundai/HyundaiIndustrial Development
Jamsil complex 1, Redevelopment,Seoul
DaedukConstruction
Mixed-use apartment, Samsan-dong,Incheon
SungwonConstruction
Sungwon Leciel Sangbong-dong, Seoul
ShindongaConstruction
2-2B Gongduk station, IncheonInternational Airport Railway
Daelim Industry,GS Construction
Block Ga, Da, Dongnam LogisticsBuidling, Jangji Complex, Seoul
29,088
29,204
26,441
26,538
89,372
29,910
34,977
42,991
39,805
29,166
33,188
35,290
31,154
85,683
Primecontractors
Construction titleTotal
length
Outstanding corrosion protection process
Block: Separately confines the strands with Grips,maximizing the performance of the strands
Tension member: general strand and coated strand, perfectcorrosion resistance (grease) and protection with theH.D.P.E Hose
Compressive distributive type system
Minimizes the creep due to load by not applying concentratedload to the ground
Prevents free anchor length confinement by perfectlyprotecting the tension member
The allowed anchoring force can be adjusted according tothe ground conditions
SW-PCD AnchorSW-PCD Anchor
SW-PCD anchor system is a compressive-distributive type permanentanchor, developed and commercialized by SAMWOO. UnbondedP.C. strands are used as tension members, having outstanding corro-sion and rust protection. The block also has sealing structure that hasoutstanding corrosion protection.
SW-PCD permanent anchor system separately confines the strandswith grips to maximize the performance of the strands, and since itdoes not apply concentrated load to the ground, being a compres-sive-distributive type anchor, it can minimize the creep due to theload, and also, the allowed anchoring force can be adjusted accord-ing to the ground condition.
Also, since its fixation location is flexible, it can secure the necessaryload easily as well as re-tension, even if the bearing plate or blocksubsides due to the lack of the supporting force of the main floor.
SW-PCD Anchor System
10
SW-PCD Anchor System Structure / SpecificationTo strengthen the merits of the compressive-distributive type anchor, we separately confined the strands bound to the block. Such separatedconfining system is a system that bounds the insert to the inside of the Grip, assembles the strand, and completely bounds by pushing it intothe device with a small diameter.
Tension member Grip(Fitting) Insert Haed Cap Grip Block
www.swanchor.com SAMWOO 11
SW-PCD- 50
SW-PCD- 85
SW-PCD-110
SW-PCD-140
4
6
8
10
74.8
112.2
149.6
187.0
63.6
95.4
127.2
159.0
44.88
67.32
89.76
112.20
57.24
85.86
114.48
143.10
2
3
4
5
TypeNo. of P.C. Strand
(12.7mm)Ultimate strength
(Tus)Yield strength
(Tys)Allowable force
(0.6Tus)Jacking force
(0.9Tys)No. of
Anchor body(ea)
12.7mm P.C. Strand - KS D 7002 SWPC 7B (Low Relaxation)
SW-PCD- 80
SW-PCD- 120
SW-PCD-160
SW-PCD-200
4
6
8
10
106.4
159.6
212.8
266.0
90.4
135.6
180.8
226.0
63.84
95.76
127.68
159.60
81.36
122.04
162.72
203.40
2
3
4
5
TypeNo. of P.C. Strand
(15.2mm)Ultimate strength
(Tus)Yield strength
(Tys)Allowable force
(0.6Tus)Jacking force
(0.9Tys)No. of
Anchor body(ea)
15.2mm P.C. Strand - KS D 7002 SWPC 7B (Low Relaxation)
Separate discussion is required for specifications other than the standard load
Machinerycarry-in
Machineryinstallation
Drilling First groutingPulling-outthe casing
Anchor factoryprocessing assembly
Repeated work
Anc
hor
inse
rtio
n
PreparationTemporary
hole
Grout facility installation
Jacking andfixationProof test
Blockinstallation
Head partprocessing
Head part protectionCon's construction
Next stepprocessing Completion
Repeated work Corrosion-protection process
SW-PCD AnchorSW-PCD AnchorSW-PCD Anchor System Process
SW-PCD Permanent Anchor Construction Order
12
Block installation Jacking and fixationAnchor head part finishingand next step processing
Grout
Grouting
Anchor
Anchor insertionDrilling
Casing
1. Take care not to tear or damage the strand coating. If the strand corrodes through the damaged part, it is difficult for the permanent anchor to fully perform its role.
2. Avoid soiling the anchor body with dirt or alien substances when moving the anchor body at the site. It is difficult to secure anchoring force, not being able to applycompression to the grout.
3. Take care to prevent the destruction of the drilled hole when inserting the anchor body. It is difficult to secure anchoring force, for the grout is yet not filled in.
SW-PCD Anchor System - Guideline
Second groutingCuring(Filling grout)
SW-PCD anchor system, a corrosion-protection permanent anchor system, was first commercialized in 2003, and is most widely usedfor various permanent purposes such as supplementation and stabilization of cut sections at new road or additional construction sites,stabilization of slope, supplementation of revetment, stabilization of tunnel pit mouths, and lift up resistance based on its outstandingconstructability and economic efficiency.
Major Achievements on SW-PCD Anchor System in Korea
www.swanchor.com SAMWOO 13
Hyundai ConstructionCo.Ltd.
Yeonnam Elementary School,Mabook-li, Yongin
HyundaiConstruction Co.Ltd.
Military Mutual Aid Association apart-ment, Mabook-li, Gusung, Yongin
ChungdoConstruction
Road (Ori road) transference,Gwangmyeong~Anyang
Daelim IndustryCo.Ltd.
Nambumin-dong, Busan
Sambu ConstructionCo.Ltd.
Project 11, Yeoju~Gumi, Central inland
Samsung Corp.Co.Ltd.
Land construction, additional buildings forSamsung Precision Chemicals, Ulsan
Yongsan DistrictOffice
Road expansion, Huam-dong, Yongsan
Kumho ConstructionCo.Ltd.
Project 4, Daegu~Busan Highway
Samrim Construction,Taean E&C
STX Joseon Project D-04,Jinhae~Busan
GangsanConstruction Co.Ltd.
Underground Pedestrian road, Dongbaecomplex, Yongin, Gyeonggi-do
KyeryongConstruction Co.Ltd.
Underground road, Dongbae complex,Yongin, Gyeonggi-do
Korea HighwayManagement Corp.
Project 2, Donghaw Highway,Kangwondo
AmcoHyundai Mobis Western Office, Paju,
Gyeonggi-do
6,835
14,314
4,858
10,041
75,816
5,334
7,722
7,237
5,316
6,366
11,465
6,280
8,442
Primecontractors
Construction titleTotal
length
SW-PTF AnchorSW-PTF Anchor
SW-PTF anchor system is a tensile-frictional type perma-nent anchor system, which has been widely used in Koreaand overseas, with sufficient research results and applica-tion history. It has outstanding corrosion and rust protection,and is used for various permanent purposes such as lift upresistance, supplementation and stabilization of cut sectionsat new load and additional construction area, stabilization ofslope, supplementation of walls, and stabilization of tunnelpit mouths based on its advanced quality obtained throughstandard production process.
There are two types according to the form of the Nose-con;an open type and a closed type.
SW-PTF Anchor System
SW-PTF Anchor(Closed Type)
SW-PTF Anchor(Open Type)
14
SW-PTF anchor system, with its outstanding corrosion and rust protection structure, has been widely used domestically and overseasfor various permanent purposes such as lift up resistance, supplementation and stabilization of cut sections, stabilization of slope, sup-plementation and stabilization of revetment, stabilization of tunnel pit mouths, and lift up prevention.
Major Achievements on SW-PTF Anchor System in Korea
www.swanchor.com SAMWOO 17
Hanshin EngineeringConstruction Co.Ltd.
Donga, Hanshin (Choheung Chemicals)apartment, Shindorim
Samsung Corp.Co.Ltd.
Yongsan Sanchum complex, redevelop-ment apartments
HyundaiConstruction Co.Ltd.
Busan International exhibition hall /con-vention center
Hankook HeavyIndustry
Jugong apartment, Huigyung-dong
Hyundai IndustrialDevelopment Co.Ltd.
Angook apartment reconstruction,Incheon
SamsungConstruction
Reconstruction of Dangsan SibumWegui, Samsung Raemian
HyundaiConstruction Co.Ltd.
Reconstruction of civil apartment,Jangan-dong
Lotte ConstructionCo.Ltd.
Lotte Castle Grand, Yongsan, Daegu
Dongil Co.Ltd.Dongil Suite Emart, Danggam-dong,
Busan
Samsung Corp. Co.Ltd.Reconstructed apartment, Siyoung 2nd,
Jangan
ByucksanConstruction
Flood loss recovery, road betweenSabook~Goan
Hanil ConstructionHanil UNI apartment, Yeonjae-gu,
Busan
Donghae ComprehensiveConstruction
Historical relic exhibition hall, Guinsa,Danyang, Choongbook
HyundaiConstruction
Siyoung 2-2 complex reconstruction,Jangan, Seoul
Samhwan Corp./LotteConstruction
Eunpyeong New Town, Eunpyeong-gu,Seoul
15,924
29,656
15,954
24,228
13,575
25,000
35,631
12,135
12,644
17,301
22,998
23,457
19,813
15,458
14,689
Primecontractors
Construction titleTotal
length
Anchor TestAnchor Test
SAMWOO began anchor tests in 1998, first in the anchor industry, and has been conducting various anchor tests over
hundreds of times domestically and overseas during the past 10 years, including performance tests, proof tests, creep
tests, and Lift-Off Tests. Our accruing technologies and know-how is contributing to the development of related
industries, and is being the foundation of development and producing better anchor products.
Anchor Test Service
18
Performance Test
Elastic and Residual Movement
Proof Test
Extended Creep Test
Test Types and Methods
Lift-Off TestLift-off test is conducted to confirm the tension of the ground anchor that has alreadybeen fixed. Refer to the test result as data for the malignance of the tension.
Creep TestCreep tests are conducted to judge whether the load has been decreased due tothe anchor's creep (relaxation of the strand, creep of the grout, ground, bondedanchor length), and its purpose is in determining the creep's tendency thanquantitatively judging it. Extended creep test takes a long time (about 8 hours).This test is for measuring the creep transformation of the anchor, and is requiredfor anchors built into clay grounds that have plasticity indexes of 20 or more, andliquid limits of 50 or more.
Proof TestProof tests are conducted to prove and evaluate the fact that the performancesof all the anchors are fit for the site condition.
Performance TestPull-out test : pull-out tests are conducted to investigate and prove theground conditions proposed in the design conditions, used materials, the qual-ity of the anchor based on the safety rate, and the preciseness of the designbefore actual anchor construction.
Jacking test : Jacking tests are conducted to anchors installed under condi-tions identical to that of actually applied anchors, and are jacked to the actualload level. The test is conducted until the fact that stabilization in the allowedscope has been achieved is proved, regarding the anchor jacking or creepdestruction.
SAMWOO has a production factory, comprising two production buildings, one office, and one laboratory and dormitory
(a total of four buildings) in a 1.7 acre land in Gimpo city, Gyeonggi-do. We apply standardized production processes and
semi-automated processes, and have a total of four production lines, including two RCD lines for the production of
SW-RCD anchor system, one PCD line for SW-PCD anchor systems, and a PTF line for SW-PTF anchor systems.
Production Facility
Laboratory and Quality Management
www.swanchor.com SAMWOO 19
SAMWOO periodically conducts self-governed quality management tests to provide high quality products to the customers,
performing various tests for the improvement of the anchor quality and the development of new products, such as the strand
yield and break test, wedge grip test, high pressure waterproof test, real model test board, and compression strength test, with
the various test equipments at the separate test room in the factory.
Research & DevelopmentResearch & Development
SAMWOO has been conducting various academic-industrial joint researches for the improvement of the anchor
system's performance and the development of the anchoring technology, and is contributing to the technical
development of the related industries through such R&D activities.
Research & Development
20
Korea Ground Engineering Association. Dissertation Anthology VOL. 16, NO3, p145~155
“Development and Performance Evaluation of Compressive Type Anchors” Korea Ground EngineeringAssociation 2001 Spring, Academic Conference, Dissertation Anthology, p339~346
“Problems of and Improvement for General Temporary Anchors” Korea Ground EngineeringAssociation 2003 Spring, Academic Conference, Dissertation Anthology, p545~552
“A Study on the Pull-Out Characteristics of the Permanent Anchor” Hanyang University,Industrial Graduate School, Master's Degree Thesis, p2~12
“SW-RCD Anchor System Manual” Samwoo Geotech Co.Ltd.
“Development of Inclination Supplementation Technology UsingCompressive-Distributive Type Anchors” Project 2005
SAMWOO holds numerous domestic and overseas patents through its ceaseless R&D efforts at
the R&D department, and obtained many certifications such as the ISO 9001, venture enterprise
certification, and INNOBIZ, being acknowledged of its efforts for product and technology
development as well as quality management.
Official Certifications
www.swanchor.com SAMWOO 21
SAMWOOAnchor Technology
Youngdungpo road
WooriBank
Jaeil Bank
Dangsan Park
Youngdungpo District
Office
Seoul-IncheonHighway
Exit 2,YoungdungpoDistrict Office
Station
Olympics RoadDangsan road
SAMWOOAnchor Technology
Samwoo Geotech Co.Ltd. Main Office
Ganghwa
Ganghwa Bridge downstream of Limjin River
Moonsu Mt.
Masong1.3km
3km
Dow
nstre
am o
f Han
Riv
er
Hasung-myeon
Gimpo CC
Hasung ThreewayTaesan Family park
Magok Crossroad
Olympics RoadGimpo/Seoul
SAMWOO will further contribute to the development of the anchor technology in Korea
based on its 15 years of technical know-how as an anchor specialist, and endeavor to
widely spread the outstanding qualities of the Korean anchor technology.
Reference1.Ground Anchor Technology Association(1996), Ground anchor
method design guidelines”, Ground Anchor TechnologyAssociation,
2.Nak-gyung Kim, Wan-suh Park(2000), Load Transfer of GroundAnchors in Clay, Academic Conference, Dissertation Anthology,VOL. 16, NO3
3.Nak-gyung Kim, Sung-gyu Kim(2001), Development andPerformance Evaluation of Compression Type Anchors”, KoreaGround Engineering Association 2001 Spring AcademicConference, Dissertation Anthology
4.Sung-gyu Kim (2001), Study on the load transference of compres-sion type ground anchors”, University of Sungkyunkwan, GradulateSchool, Master's Degree Thesis
5.Sung-gyu Kim, Nak-gyung Kim, Jeong-ryul Kim (2003), Problemsof and Remedies for General Temporary Anchors” Korea GroundEngineering Association 2003 Spring Academic Conference,Dissertation Anthology
6.Young-chul Suck(1998), A Study on the Pull-Out Characteristics ofthe Permanent Anchor” Hanyang University, Industrial GraduateSchool, Master's Degree Thesis
7.Sang-duk Lee(1997), Soil Test - Principles and Methods-“, Sairon
8.Samwoo Geotech Co.Ltd. (2001), SW-RCD Anchor SystemManual”, Samwoo Geotech Co.Ltd.
9.Korea Industrial Standard (1995), PC strand and PC strand, KS D7002”, Korea Industrial Standard Association
10.Korea Ground Engineering Association (1992), Excavation andSheeting method”, Korea Ground Engineering Association
11.AASHTO(1990), 'Tieback specifications', AASHTO-AGC-ARTBATask Force 27
12.Kim, N. K. (2000). Load Transfer on Ground Anchors inWeathered Soils, Proceedings of Improvement Techniques,September 25-26, Singapore, 2000.9.
13.Civil Engineering Department Hong Kong(1989), "ModelSpecification for Prestressed Ground Anchors"
14.FHWA-IF-99-015(1999), "Ground Anchors and AnchoredSystems"
15.L Hobst & J. Zajlc(1983), "Anchoring in Rock and Soil", ELSEVI-ER SCIENCE PUBLISHERS
16.Petros P. Xanthakos, "Ground Anchors and Anchored Structures"
Main Office_ 257-4(Youngsam Building, 3rd floor),Dangsan-Dong, 3 Ga, Youngdeungpo-Gu, Seoul
TEL. 02) 2679-2380 / FAX. 02) 2634-6912
Factory _ 641-1 Guijeon-Li, Tongjin-Eup, Gimpo, Kyunggi-Do
TEL. 031) 996-1451 / FAX. 031) 996-1455
Samwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo FactorySamwoo Geotech Co.Ltd.Gimpo Factory
www.swanchor.com
Head Office _ 150-803, Youngsam Bldg, Dangsan-Dong 3 Ga 257-4,Youngdeungpo-Gu, Seoul, Korea
Tel. 82-2-2679-2380 / Fax. 82-2-2634-6912
Factory _ 415-862, 641-1, Guijeon-Li, Tongjin-Eup, Kimpo-City,Kyunggi-Do, Korea
Tel. 82-31-996-1451 / Fax. 82-31-996-1455
Vietnam Branch _ Unit 201 2F 180-182 Ly Chinh Thang, F9, Q3, HCMC
Tel. 84-8-290-5242 / Fax. 84-8-290-5243