WO2009074041A1 - Procédé de traitement rapide pour sol fragile peu profond - Google Patents

Procédé de traitement rapide pour sol fragile peu profond Download PDF

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Publication number
WO2009074041A1
WO2009074041A1 PCT/CN2008/073090 CN2008073090W WO2009074041A1 WO 2009074041 A1 WO2009074041 A1 WO 2009074041A1 CN 2008073090 W CN2008073090 W CN 2008073090W WO 2009074041 A1 WO2009074041 A1 WO 2009074041A1
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WO
WIPO (PCT)
Prior art keywords
laying
layer
geotextile
drainage
dike
Prior art date
Application number
PCT/CN2008/073090
Other languages
English (en)
Chinese (zh)
Inventor
Wang Xu
Original Assignee
Wang Xu
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wang Xu filed Critical Wang Xu
Publication of WO2009074041A1 publication Critical patent/WO2009074041A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains

Definitions

  • the present invention relates to a method for processing a large area of soft soil foundation, and more particularly to a method for processing a shallow "solid high vacuum overwater preloading" shallow soft foundation. Background technique
  • the conventional methods of drainage consolidation method for soft soil foundation are: vacuum preloading method, stacking preloading method and high vacuum compacting method.
  • the soft soil foundation treatment using the above method requires the use of machinery to walk on a soft foundation. Therefore, the initial bearing capacity of the foundation generally needs to be above 30 ⁇ 40KPa. In the beach and the newly-filled area, the initial bearing capacity is almost zero, so the above method cannot be directly used for the treatment of the soft soil foundation, and the initial bearing capacity of the foundation needs to be improved first.
  • the current method is: first lay geotextile, then lay Jingba, plus 0.5 ⁇ 1.5m thick sand cushion.
  • the role of the sand cushion can not only improve the initial bearing capacity of the foundation, but also serve as a horizontal channel for vacuum preloading.
  • the object of the present invention is to provide a rapid "stereo high vacuum overwater preloading" shallow soft ground treatment method, thereby avoiding the use of cumbersome mechanical equipment and eliminating the investment of huge sand cushion to reduce construction cost and speed up construction. schedule.
  • the rapid "stereo high vacuum overwater preloading" shallow soft ground treatment method of the present invention comprises the following steps: First, lay a layer of colored strips on the soft soil surface, lay a layer of Jingba on the colored strips, lay a layer of geotextile on the Jingba, and then manually insert some plastic drainage boards on the laid geotextiles. Leave a proper length and horizontally set a number of horizontal drainage facilities. One end of the horizontal drainage facility is connected to the outer part of the plastic drainage board, and the other end is connected to the vacuuming equipment. A vacuum membrane is placed on the horizontal drainage facility and built around. a dike (water retaining embankment) with a water-repellent membrane on the embankment;
  • the vacuuming device is started to start vacuuming, and the pumped water is injected into the dike, and the water is naturally formed to increase the pressure; after a period of time, the settlement is observed. If the settlement is less than 2 ⁇ 5 mm per day for 3 to 7 days, the vacuum is stopped. .
  • the horizontal drainage facility employs a vented steel tube or a fibrous drainage bag.
  • the plastic draining plate has an outer length of 30 to 60 cm.
  • the plastic drainage plates are arranged in a square or equilateral triangle.
  • the distance between the plastic drainage plates is 1.1 to 1.4 meters.
  • the permeable steel tube has a pitch of 1 to 4 meters.
  • the inner area of the dike is 10,000 to 50,000 m 2 .
  • the dike height is 1.5 to 3.5 meters.
  • the vacuuming time is from 1 to 5 months.
  • the soft soil foundation especially the beach, the newly-filled area and the like, which have almost zero soft soil foundation, can achieve the purpose of fast and provincial soft foundation treatment, and at the same time, Construction costs can be reduced by avoiding the use of bulky machinery and by eliminating the need to invest in huge sand cushions.
  • Figure 1 is a schematic view of the arrangement of plastic drainage boards.
  • Figure 2 is a schematic view of a vented steel tube
  • Figure 3 is a schematic view of the fiber drainage bag
  • FIG. 4 is a schematic illustration of the processing method of the present invention. detailed description
  • the ground treatment method is as follows:
  • the plastic drainage board is arranged by manual insertion using a portable manual inserting board, and the drainage board is arranged in a square or an equilateral triangle, and the spacing of the plastic drainage board is 1.1 to 1.4. Meter, and leave the plastic drainage board 30 ⁇ 60 cm outside the geotextile.
  • horizontal drainage facilities breathable steel pipe or fiber drainage bag
  • the horizontal drainage facilities are spaced 2 to 4 meters apart.
  • One end of the horizontal drainage facility is connected to the outer part of the plastic drainage board, and the other end is connected to evacuate.
  • Equipment jet pump is used in this embodiment).
  • the ventilated steel wire tube as the horizontal drainage facility is a curved pipe with a diameter of 30 ⁇ 60cm which is rolled by the geotextile outer steel wire (as shown in Fig. 2), and the fiber horizontal drainage bag is formed by the geotextile or hemp fabric outer plant fiber tow.
  • the bag (as shown in Figure 3).
  • the above-mentioned laid soft soil surface layer of 10000 ⁇ 50000 m 2 is set as a water covering unit, and a water retaining bank is built around the water covering unit, and the height is usually about 1.5 to 3.5 m, and is on the water retaining bank.
  • Set a water-repellent membrane then use a jet pump to start vacuuming, and inject the vacuumed water into the embankment to form a natural overburden to increase the pressure on the soft soil foundation, evacuate for about 1 ⁇ 2 months, and observe the settlement. It was observed that for 3 to 7 consecutive days, the settlement was less than 2 ⁇ 5 mm per day. Vacuum is applied and the bearing capacity of the foundation is detected. After testing, the foundation bearing capacity has been increased from 10 KPa to 80 Kpa to achieve the desired treatment target.
  • the construction cost of this embodiment is 60 to 70% of the conventional vacuum preload. Therefore, the rapid "stereo high vacuum overwater preloading" shallow soft ground treatment method of the invention can achieve the purpose of processing the soft foundation quickly and economically, and at the same time, avoiding the use of bulky mechanical equipment and investing huge sand.
  • the cushion layer reduces construction costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

La présente invention concerne un procédé de traitement rapide pour sol fragile peu profond comprenant les étapes suivantes : A) la pose d'une bande de tissu coloré sur la couche superficielle du sol fragile, la pose d'une couche de plantes épineuses sur le tissu coloré, et la pose d'une couche de géotextile sur la couche de plantes épineuses, suivie de l'introduction de barre de drainage de matière plastique au niveau de la couche géotextile laissant en saillie vers l'extérieur une longueur appropriée des barres de drainage, tout en déposant une installation de drainage horizontale avec une extrémité raccordée à l'extérieur des barres de drainage et l'autre extrémité étant raccordée à un équipement de pompage sous vide ; la pose d'un film sous vide sur l'installation de drainage horizontale, la construction d'un film barrière à membrane de bordure et de prise ; B) la reprise d'aspiration et de perfusion d'eau drainée dans la bordure pour former une eau de couverture ; C) l'observation d'affaissement sur une période de temps après la reprise d'aspiration, et si l'affaissement journalier en séquence de 3 à 7 jours est inférieur à 2 à 5 mm, on pourra interrompre la collecte d'aspiration.
PCT/CN2008/073090 2007-12-12 2008-11-17 Procédé de traitement rapide pour sol fragile peu profond WO2009074041A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710172127.1 2007-12-12
CN2007101721271A CN101457519B (zh) 2007-12-12 2007-12-12 快速“立体高真空覆水预压”浅层软地基处理方法

Publications (1)

Publication Number Publication Date
WO2009074041A1 true WO2009074041A1 (fr) 2009-06-18

Family

ID=40755233

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2008/073090 WO2009074041A1 (fr) 2007-12-12 2008-11-17 Procédé de traitement rapide pour sol fragile peu profond

Country Status (3)

Country Link
CN (1) CN101457519B (fr)
MY (1) MY157332A (fr)
WO (1) WO2009074041A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103243703A (zh) * 2013-04-18 2013-08-14 浙江大学宁波理工学院 一种采用侧壁开孔硬质空心管处理软土固结的方法
CN112554196A (zh) * 2020-11-24 2021-03-26 浙江河海建设有限公司 一种闭气土方抛填施工工艺
CN115182327A (zh) * 2022-06-14 2022-10-14 中交上海航道局有限公司 一种城市道路软基一次有砂真空预压的处理工艺
CN115492131A (zh) * 2022-08-23 2022-12-20 攀钢集团矿业有限公司 一种尾矿库闭库尾部软弱滩面路堤式覆土方法及装置

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CN103225267B (zh) * 2013-03-29 2015-07-15 天津二十冶建设有限公司 深厚软土地基桥台施工方法
CN103397627A (zh) * 2013-08-21 2013-11-20 上海港湾基础建设（集团）有限公司 一种改进的围堤覆水预压法
CN104746506A (zh) * 2013-12-30 2015-07-01 深圳市工勘岩土工程有限公司 软土联合预压结构和施工方法
CN105350511B (zh) * 2015-12-01 2017-03-29 浙江理工大学 一种围堤囊条、储水围堤及进行水堆载预压的方法
CN105926577B (zh) * 2016-06-01 2018-06-15 上海建研地基基础工程有限公司 真空预压渗流固结法
CN105862719B (zh) * 2016-06-01 2018-10-19 上海建研地基基础工程有限公司 加筋地基
CN105862717B (zh) * 2016-06-01 2018-08-21 上海建研地基基础工程有限公司 一体式井点塑排真空系统
CN105862714B (zh) * 2016-06-01 2019-01-25 上海建研地基基础工程有限公司 软土地基覆水型一体式井点塑排真空系统
CN105970910B (zh) * 2016-06-01 2018-06-19 上海建研地基基础工程有限公司 井点塑排覆膜真空预压联合降水预压动力固结法
CN107870128A (zh) * 2017-01-05 2018-04-03 天津大学 一种泥封式真空预压室内试验模型
CN107761700A (zh) * 2017-10-10 2018-03-06 武汉大学 软土地基的压载方法
CN113216145B (zh) * 2021-05-12 2022-07-29 国强建设集团有限公司 一种钢板桩结合粘土密封墙真空预压施工工法

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JP2000328550A (ja) * 1990-06-17 2000-11-28 Maruyama Kogyo Kk 軟弱地盤の改良工法及びその改良施工装置
EP1557496A1 (fr) * 2002-10-31 2005-07-27 Maruyama Kougyo Kabushiki Kaisha Procede et dispositif pour ameliorer un sol pauvre
CN1664245A (zh) * 2005-04-01 2005-09-07 东南大学 气压劈裂真空预压法加固软土地基操作方法
CN1884709A (zh) * 2006-06-21 2006-12-27 徐士龙 快速“填水预压、动力压差排水”软地基固结方法
CN101041960A (zh) * 2006-03-23 2007-09-26 周健 软土地基高侧压快速排水固结方法

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CN100516375C (zh) * 2006-03-07 2009-07-22 张志铁 双真空预压及动力挤密法联合加固软土地基方法
CN1884708A (zh) * 2006-07-11 2006-12-27 张志铁 双真空自载联合预压及动力挤密综合加固软土地基的方法
CN100537903C (zh) * 2006-11-20 2009-09-09 包国建 “短程超载真空预压一动力排水固结联合法”软土地基处理工法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000328550A (ja) * 1990-06-17 2000-11-28 Maruyama Kogyo Kk 軟弱地盤の改良工法及びその改良施工装置
EP1557496A1 (fr) * 2002-10-31 2005-07-27 Maruyama Kougyo Kabushiki Kaisha Procede et dispositif pour ameliorer un sol pauvre
CN1664245A (zh) * 2005-04-01 2005-09-07 东南大学 气压劈裂真空预压法加固软土地基操作方法
CN101041960A (zh) * 2006-03-23 2007-09-26 周健 软土地基高侧压快速排水固结方法
CN1884709A (zh) * 2006-06-21 2006-12-27 徐士龙 快速“填水预压、动力压差排水”软地基固结方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103243703A (zh) * 2013-04-18 2013-08-14 浙江大学宁波理工学院 一种采用侧壁开孔硬质空心管处理软土固结的方法
CN112554196A (zh) * 2020-11-24 2021-03-26 浙江河海建设有限公司 一种闭气土方抛填施工工艺
CN115182327A (zh) * 2022-06-14 2022-10-14 中交上海航道局有限公司 一种城市道路软基一次有砂真空预压的处理工艺
CN115182327B (zh) * 2022-06-14 2023-07-21 中交上海航道局有限公司 一种城市道路软基一次有砂真空预压的处理工艺
CN115492131A (zh) * 2022-08-23 2022-12-20 攀钢集团矿业有限公司 一种尾矿库闭库尾部软弱滩面路堤式覆土方法及装置
CN115492131B (zh) * 2022-08-23 2023-06-13 攀钢集团矿业有限公司 一种尾矿库闭库尾部软弱滩面路堤式覆土方法及装置

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Publication number Publication date
CN101457519B (zh) 2010-09-22
CN101457519A (zh) 2009-06-17
MY157332A (en) 2016-05-31

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