Miraculous Solution to Asia Pacific Soft Ground Improvement


Published on

  • Be the first to comment

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

Miraculous Solution to Asia Pacific Soft Ground Improvement

  1. 3. What we do? <ul><li>Shanghai Geoharbour Group (SGG) is specializing in: </li></ul><ul><li>Land Reclamation </li></ul><ul><li>Soft Ground Improvement </li></ul>Research Design Consulting Construction
  2. 4. Qualification of SGG <ul><li>ISO9001/ISO14001/OHSAS18001 Certificate </li></ul><ul><li>First class for Ground Improvement Engineering </li></ul><ul><li>China Institute of Innovative Soft Soil Improvement – Chairmanship unit </li></ul><ul><li>China Association of Inventions (CAI) – Vice president unit </li></ul><ul><li>Completed projects > 90 Sq. Km </li></ul>
  3. 5. What is HVDM Series of Innovative Technology? High Vacuum Densification Method 1 Vacuum Preloading plus HVDM 2 HVDM plus Composite Foundation 3
  4. 6. HVDM Series of Inventions <ul><li>High Vacuum Densification Method </li></ul><ul><li>(HVDM) </li></ul>
  5. 7. Introduction of HVDM <ul><li>HVDM is a fast soft soil improvement method, which combines efforts of vacuum drainage and dynamic compaction in designated cycles. </li></ul><ul><li>It leads the jobsite to be dewatered, densified and improved fast. The post-treatment (differential) settlement is mitigated and bearing capacity is improved. </li></ul>
  6. 8. HVDM Framework Over-consolidated shell No drainage pathway Creativity Active drainage under pressure gradient
  7. 9. Active Drainage under Pressure Gradient <ul><li>Positive pressure by compaction </li></ul><ul><li>Negative pressure by vacuum </li></ul><ul><li>Over 1 atm (101 kPa) </li></ul>Ө Ө Ө Ө Ө Ө ⊕ ⊕ ⊕ ⊕ ⊕ ⊕ ⊕ ⊕ ⊕ ⊕ ⊕ ⊕
  8. 10. Three Breakthroughs of Pressure Gradient <ul><li>Extend the applicable scopes of vacuum well drainage method for impermeable soils . </li></ul><ul><li>Challenge the common sense: &quot;dynamic compaction method is not applicable for saturated soft soil &quot;. </li></ul><ul><li>Expedite the pore pressure dissipation and save the schedule from 3-4 weeks to 5-10 days, for a cycle. </li></ul>
  9. 11. HVDM Site Photos Pipe Installation PVC Layout Vacuum System
  10. 12. HVDM Site Photos Description of the contents Vibration Compaction Dynamic Compaction
  11. 13. Alternate Run HVDM 1 st Vacuum 2 nd Vacuum Optional Vacuum 1 st Compaction 2 nd Compaction Roll or Vibration HVDM Principle
  12. 14. Data Acquisition Soil and construction data are monitored to optimize the treatment operations. Ground Settlement Vacuum Degree CPT Excess porewater pressure Compaction Subsidence Elimination of rubber soil and efficient soil densification Groundwater Table
  13. 15. 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
  14. 16. Green & patent technology <ul><li>Pure mechanical process, no chemical additives. </li></ul><ul><li>Already saved 60-70 million tons of cement, reducing 60-70 million tons CO 2 emission. </li></ul><ul><li>HVDM series already are patented in 20 countries, e.g. China, US, Australia, Japan, Malaysia, Indonesia, Vietnam, UAE, South Africa, Egypt etc.. </li></ul>
  15. 17. HVDM Series of Inventions Vacuum Preloading + HVDM
  16. 18. 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
  17. 19. HVDM Series of Inventions HVDM plus Composite Foundation
  18. 20. Schematic of Construction Hard Shell by HVDM Enhanced shaft friction
  19. 21. <ul><li>Optimize shaft-soil load, decrease shaft negative friction, increase shaft friction, and reduce the number of shaft. </li></ul><ul><li>Reduce the post-treatment total and differential settlement. </li></ul><ul><li>Save cost and schedule compared to piling foundation. </li></ul>Benefits
  20. 22. 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
  21. 23. APPLICATION OF HVDM SERIES <ul><li>Airport </li></ul><ul><li>Harbour & Ports </li></ul><ul><li>Highways </li></ul><ul><li>Power Plants </li></ul><ul><li>Petrochemical factory </li></ul><ul><li>Heavy industry, e.g.: steel factory, aluminum factory etc. </li></ul><ul><li>Logistic facility </li></ul><ul><li>…… </li></ul>
  22. 24. The 2nd Runway of Shanghai Pudong Int’l Airport Case Study:
  23. 25. 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 Requirements Post-treatment settlement ≦10 cm Differential settlement ≦ 1 /1000 Geological Data
  24. 26. Site in Use Site under Construction
  25. 27. Treatment Data of 1st and 2nd Runways <ul><li>1 st runway using dynamic compaction with road ballast </li></ul><ul><ul><li>Consolidation: 35 cm </li></ul></ul><ul><ul><li>Post-treatment settlement: 30 cm </li></ul></ul><ul><ul><li>High cost </li></ul></ul><ul><ul><li>Schedule: 12 months </li></ul></ul><ul><li>2 nd runway using HVDM </li></ul><ul><li>- Consolidation: 55.7 cm </li></ul><ul><ul><li>Post-treatment settlement: 10 cm </li></ul></ul><ul><ul><li>Saving of RMB125 million </li></ul></ul><ul><ul><li>Schedule: 4 months </li></ul></ul>
  26. 28. Case Study: Phase III Ningbo Beilun Port
  27. 29. <ul><ul><li>• Newly dredged fly ash: 0-2 m, slurry, zero bearing </li></ul></ul><ul><ul><li>capacity, cannot step on. </li></ul></ul><ul><li>• Mucky clay: 2-10 m, CPT Ps value 0.10 MPa. </li></ul>Requirements <ul><ul><li>Bearing capacity fak = 120 kPa </li></ul></ul><ul><ul><li>Treatment consolidation ≥ 600 mm </li></ul></ul>Geological Data
  28. 30. After Treatment Trench Excavation Before Treatment Treatment Effect
  29. 31. CPT Ps Data before and after Treatment
  30. 32. 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
  31. 33. Zhuhai N. Qinglv Highway Case Study:
  32. 34. Requirements <ul><ul><li>1. Bearing capacity >130 kPa </li></ul></ul><ul><ul><li>2. Resilient modulus >30 MPa </li></ul></ul><ul><ul><li>3. Post-treatment settlement <30 cm </li></ul></ul>
  33. 35. Effect before/after treatment
  34. 36. PLTU 3 BANTEN 3×315MW POWER PLANT, Indonesia Case Study:
  35. 37. 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
  36. 38. Picture before treatment
  37. 39. Picture of treatment
  38. 40. Cycle water pipe line excavation Picture after treatment Sample House excavation Cycle pump house excavation
  39. 41. Shandong Huangdao Oil Tank (100,000 m 3 ) Case Study:
  40. 42. 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 ④ Silty 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 <ul><li>Over 120 kPa bearing capacity </li></ul><ul><li>CPT Ps values, over 200% increase for Layers ② and ③ </li></ul><ul><li>30-35 cm settlements after treatments </li></ul>Geological Data
  41. 43. Treatment Effect <ul><li>HVDM: bearing capacity increase from 40-50kPa to 120kPa; </li></ul><ul><li>More homogeneous, less variation </li></ul><ul><li>Stone columns: increased to 210kPa; </li></ul><ul><li>2 months faster, 300 columns less, and 30% saving in cost </li></ul>
  42. 44. Tank 1 Tank 8 CPT Comparison before and after Treatments
  43. 45. 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 。。。。。。
  44. 46. 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
  45. 47. Market Indonesia Vietnam Malaysia …… America & Africa China India, Bangladesh Middle East
  46. 48. Social Appreciation 2010 2009 2008 2007 Honorary Chief Editor of CCTV program S&T China Shanghai Science & Technology Prize President of China Institute of Innovative Soft Soil Improvement Vice president unit of China Association of Inventions (CAI)
  47. 49. Significant Innovative Enterpriser of Top 50 in China <ul><li>President Xu Shi-long was awarded Significant Innovative Enterpriser by state leaders and MOST Minister. </li></ul>Sang Guo-wei, Vice-Chairman of National People’s Congress (NPC) was meeting with Pres. Xu Shi-long.
  48. 50. 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)
  49. 51. Honorary Chief Editor of CCTV program S&T China <ul><li>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. </li></ul>
  50. 52. 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.
  51. 53. On Feb 15 09, Xinwen Lianbo, a CCTV News Program, reported the successful use of HVDM in Hebei Caofeidian Industrial Park. &quot;Resolved key concerns in land reclamation from sea.“…&quot;30% savings and 50% faster&quot; In January 2008, CCTV Dialogue Program interviewed Inventor Mr Xu Shi-long, appreciating his works converting difficult soils into valuable property.
  52. 54. 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.
  53. 55. 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.
  54. 56. 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.
  55. 57. 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 .
  56. 58. 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.
  57. 59. 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.
  58. 60. 2010, High officials of Ministry of Development of Brunei met chairman of Shanghai Geoharbour Group.
  59. 61. 2010, A mbassador 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
  60. 62. 2009, Prof. Chu addressed “HVDM” lecture in 17 th International Conference on Soil Mechanics & Geotechnical Engineering in Egypt. 2009, Egypt Minister of Housing, Utilities & Urban Development (middle of the picture) met senior representative of Shanghai Geoharbour Group.