miraculous solution to asia pacific soft ground improvement

What we do?

Shanghai Geoharbour Group (SGG) is specializing in:

• Land Reclamation

• Soft Ground Improvement

Research

Design

Consulting

Construction

Qualification of SGG

•ISO9001/ISO14001/OHSAS18001 Certificate

•First class for Ground Improvement Engineering

•China Institute of Innovative Soft Soil Improvement – Chairmanship unit

•China Association of Inventions(CAI) – Vice president unit

• Completed projects > 90 Sq. Km

What is HVDM Series of Innovative Technology?

High Vacuum Densification Method1

Vacuum Preloading plus HVDM 2

HVDM plus Composite Foundation3

HVDM Series of Inventions

High Vacuum Densification Method(HVDM)

Introduction of HVDM

HVDM is a fast soft soil improvement method, which combines efforts of vacuum drainage and dynamic compaction in designated cycles.

It leads the jobsite to be dewatered, densified and improved fast. The post-treatment (differential) settlement is mitigated and bearing capacity is improved.

HVDM Framework

Over-consolidated shell

No drainage pathway

CreativityCreativity

Active drainage under pressure gradient

Active Drainage under Pressure Gradient

• Positive pressure by compaction• Negative pressure by vacuum• Over 1 atm (101 kPa)

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Three Breakthroughs of Pressure Gradient

• Extend the applicable scopes of vacuum well drainage method for impermeable soils.

• Challenge the common sense: "dynamic compaction method is not applicable for saturated soft soil".

• Expedite the pore pressure dissipation and save the schedule from 3-4 weeks to 5-10 days, for a cycle.

Pipe Installation PVC Layout Vacuum System

HVDM Site Photos

HVDM Site Photos

Description of the contentsVibration CompactionDynamic Compaction

Alternate Run

HVDM

1st Vacuum

2nd Vacuum

Optional Vacuum

1st Compaction

2nd Compaction

Roll or Vibration

HVDM Principle

Data Acquisition

Soil and construction data are monitored to Soil and construction data are monitored to optimize the treatment operations.optimize the treatment operations.

Ground Settlement

Vacuum Degree

CPT

Excess porewater

pressure

CompactionSubsidence

Elimination of rubber soil

and efficient soil

densification

Groundwater Table

Attractions of HVDM

Save 30% in cost compared to conventional methods, leading to a total saving of US$5 billion.

Shorten the construction period to 25-30 days via the pressure gradient, well less than the time required by conventional methods.

Data acquisition throughout the treatment. Control the thickness of hard shell and treat sections independently, which meet the bearing capacity and settlement requirements.

HVDM is a mechanical process, which adds no additions into the soil and protects the environments.

30% cost Saving

50% schedule saving

QA/QC

Environ-mental

Safe

Green & patent technology

• Pure mechanical process, no chemical additives.

• Already saved 60-70 million tons of cement, reducing 60-70 million tons CO2 emission.

• HVDM series already are patented in 20 countries, e.g. China, US, Australia, Japan, Malaysia, Indonesia, Vietnam, UAE, South Africa, Egypt etc..

HVDM Series of Inventions

Vacuum Preloading + HVDM

Schematic of Construction

PVD

Preloading

Consolidate the deep soil

PVD

Over-consolidate the subsurface, increase bearing capacity and eliminate differential settlement.

Hard Shell formed by HVDM

HVDM Series of Inventions

HVDM plus Composite Foundation

Schematic of Construction

Hard Shell by HVDM

Enhanced shaft

friction

1.Optimize shaft-soil load, decrease shaft negative friction, increase shaft friction, and reduce the number of shaft.

2.Reduce the post-treatment total and differential settlement.

3.Save cost and schedule compared to piling foundation.

Benefits

For shallow soft soil ， HVDM is used to form a over-consolidated shell.

For deep soft soil ， preloading is used to consolidate the deep soil, and HVDM is then used to form a hard shell at the subsurface.

For jobsite requiring high bearing capacity ， HVDM is used to increase bearing capacity. Stone columns are installed to form a composite foundation..

HVDM

Vacuum preloading plus HVDM

HVDM plus Composite Foundation

APPLICATION OF HVDM SERIES

•Airport

•Harbour & Ports

•Highways

•Power Plants

•Petrochemical factory

•Heavy industry, e.g.: steel factory, aluminum factory etc.

•Logistic facility

……

The 2nd Runway of Shanghai Pudong Int’l Airport

Case Study:

Dredge sand: ~2 m, relatively compacted, high mud

Silty clay: 4 ～ 12 m ， plastic ～ soft plastic ， medium compression

Dust mucky silty clay: ~5.0 m, saturated, liquid-plastic, heterogeneous, some sandy silt, high compression

Dust mucky clay : ~11.0 m, saturated, liquid-plastic, thin silty fine sand, homogeneous, high viscosity, high void ratio, high water content, high compression

RequirementsPost-treatment settlement ≦ 10 cmDifferential settlement ≦１ /1000

Geological Data

Site in Use

Site under Construction

Treatment Data of 1st and 2nd Runways

• 1st runway using dynamic compaction with road ballast– Consolidation:35 cm

– Post-treatment settlement: 30 cm

– High cost

– Schedule: 12 months

• 2nd runway using HVDM

-Consolidation: 55.7 cm

– Post-treatment settlement: 10 cm

– Saving of RMB125 million

– Schedule: 4 months

Case Study:

Phase III Ningbo Beilun Port

• Newly dredged fly ash: 0-2 m, slurry, zero bearing capacity, cannot step on.

• Mucky clay: 2-10 m, CPT Ps value 0.10 MPa.

Requirements Bearing capacity fak = 120 kPaTreatment consolidation ≥ 600 mm

Geological Data

After Treatment

Trench Excavation

Before Treatment

Treatment Effect

CPT Ps Data before and after Treatment

10

6

8

4

2

Ps/MPa

4 8z/m

加固前

加固后

一遍夯后

2 6 100

Treatment Effect Comparison, Phase III

Items Patch 1 (500,000 ㎡ ) Patch 2 (460,000 ㎡ )

Treatment methods PVD+surcharge preloading HVDM

Consolidation ~44 cm ~60 cm

Schedule 10 months 4 months

Post-treatment settlement of 2 yr

31 cm 14 cm

Zhuhai N. Qinglv Highway

Case Study:

Requirements

1. Bearing capacity >130 kPa2. Resilient modulus >30 MPa3. Post-treatment settlement <30 cm

Effect before/after treatment

PLTU 3 BANTEN 3×315MW PLTU 3 BANTEN 3×315MW POWER PLANT, Indonesia POWER PLANT, Indonesia

Case Study:

Requirements（ 1 ） Bearing capacity >100 kPa

（ 2 ） Lateral bearing capacity of a concrete pile >100 kN.

Geological Data

Layers Soil SPT Depths

1-a Muddy soils <2 5m

1-b Soft plastic clayey soils

1-6 4~20m

2 Plastic clayey soils, few silty sand

7-20 for clayey soils 15-30 for sandy soils

7~10m

Picture before treatment

Picture of treatment

Cycle water pipe line excavation

Sample House excavation

Cycle pump house excavation

Picture after treatment

Shandong Huangdao Oil Tank (100,000 m3)

Case Study:

① Backfills,2 m thick, uneven, mainly silty clay ② Soft silty clay, 0.4-3.7 m, liquid-plastic ③ Soft silt,2.4-8.5 m, saturated, liquid-plastic, weak, some sandy silty, high compression

④Silty clay and silty fine sand, 0.5-7.3 m, saturated, loose-medium compacted, liquid-plastic, some silty fine sand, uneven, cohesive, high void ratio, high water content, high compression

Requirements Over 120 kPa bearing capacity CPT Ps values, over 200% increase for Layers and ② ③ 30-35 cm settlements after treatments

Geological Data

Treatment Effect

HVDM: bearing capacity increase from 40-50kPa to 120kPa;

More homogeneous, less variation

Stone columns: increased to 210kPa;

2 months faster, 300 columns less, and 30% saving in cost

Tank 1 Tank 8

CPT Comparison before and after Treatments

Typical Projects in China

Jiangsu Yangtze Project, PetroChina

Wujiang Municipal Roads, Jiangsu

Caofeidian Development Park

Zhuhai N. Qinglv Rd, South Section

Phases II-VI, Shanghai Waigaoqiao

Lingang New City, Shanghai

。。。。。。

Nhon Trach 2 Combined Cycle Power Plant in Vietnam

PVTEX Polyester plant in Vietnam

LPG refrigerated storage tank in Vietnam

3×315 MW Coal Burning Power Plant in Indonesia

。。。。。。

Overseas Typical Projects

Market

IndonesiaVietnam

Malaysia ……

America & Africa

China

India,Bangladesh

Middle East

2010

2009

2008

2007

Honorary Chief Editor of CCTV program S&T China

Social Appreciation

Shanghai Science & Technology Prize

President of China Institute of Innovative Soft Soil Improvement

Vice president unit of China Association of Inventions (CAI)

Significant Innovative Enterpriser of Top 50 in China

• President Xu Shi-long was awarded Significant Innovative Enterpriser by state leaders and MOST Minister.

Sang Guo-wei, Vice-Chairman of National People’s Congress (NPC) was meeting with Pres. Xu Shi-long.

Zhang Lai-wu, Vice-Minister of MOST was meeting with Pres. Xu Shi-long. (see above)

Xing Sheng-cai, Vice-Chairman of SIPO was meeting with Pres. Xu Shi-long. (see below)

Honorary Chief Editor of CCTV program S&T China

• To cater for the economic globalization and increase the reputation of China science and technology, a new program, S&T China, is opened at CCTV Economic Channel. President XU Shi-long is committed to the Honorary Program Chief Editor.

Chinese Premier Wen Jiabao, British Prime Minister Gordon Brown, and the Inventor Mr Xu Shilong attended UK-China Business Summit in London, Britain, Feb., 2009.

On Feb 15 09, Xinwen Lianbo, a CCTV News Program, reported the successful use of HVDM in Hebei Caofeidian Industrial Park.

"Resolved key concerns in land reclamation from sea.“…"30% savings and 50% faster"

In January 2008, CCTV Dialogue Program interviewed Inventor Mr Xu Shi-long, appreciating his works converting difficult soils into valuable property.

International Cooperation

Minister of MOC of Bangladesh met President Xu Shi-long, intending to introduce the soft soil treatment techniques into Bangladesh.

MOC Sectary and Chief Engineer of RHD highly appraised the HVDM related techniques according to their site visit.

Inventor delivered a special lecture in Vietnam as the invitation of Ministry of Science and Technology of Vietnam. Major media, including Vietnam Central TV, Central People’s Radio Station etc. reported the news.

Vietnam President Nguyen Minh Triet was attending the commencement ceremony of Nhon Trach 2 Project, and delivering an opening address.

In 2009, ASCE invited the Inventor to present a special lecture in a workshop in Orlando. The US was introducing HVDM technique into the US professional specifications.

Sino-US Seminar on HVDM Specification Modification, attended by many senior experts, including Committee Chairman of US TRB, Executive Chairman of FHWA Specifications, Dean of the College of Civil Engineering of Tongji Un.

In 2009, Ukraine would cooperate with South Korea to construct an aerospace industrial complex in Incheon. Lee Myung-bak, South Korea President, attended the signing ceremony.

The Chief of the complex and the Mayor of Incheon met with the President Xu, discussing the

sea reclamation of the jobsite.

In 2007, HVDM series were successfully applied to power plant project in Indonesia. The picture indicates the meeting of Mr.Lan (3rd right), Ambassador of PRC in Indonesia, Mr.Wang (2nd left), President of China-Indonesia Commercial Association, and Inventor (3rd left)

In 2004, Lee Kuan Yew (the former President and current Minister Mentor of Singapore) was inspecting HVDM treatment sites at Phase II and III of Xinghua Port.

In 2006, a Korean delegate leaded by Vice President of Korea Academy of Engineering visited Shanghai, and agreed to introduce the inventions to Korea.

In 2008, Finland’s Environmental Minister appreciated the green use of HVDM and met the Inventor.

2010, High officials of Ministry of Development of Brunei met chairman of Shanghai Geoharbour Group.

2010, Ambassador of Oman in China visited us and hope HVDM series into Middle East. (R2)

2010, Chairman of the State Council of Oman met Chairman of Shanghai Geoharbour Group

2009, Prof. Chu addressed “HVDM” lecture in 17th International Conference on Soil Mechanics & Geotechnical Engineering in Egypt.

2009, Egypt Minister ofHousing, Utilities & Urban Development (middle of the picture)

met senior representative of Shanghai Geoharbour Group.