WO2007073662A1 - Procede de traitement rapide de fondations sur sol mou par densification a vide eleve en combinaison avec un procede de fondations empilees - Google Patents

Procede de traitement rapide de fondations sur sol mou par densification a vide eleve en combinaison avec un procede de fondations empilees Download PDF

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Publication number
WO2007073662A1
WO2007073662A1 PCT/CN2006/003337 CN2006003337W WO2007073662A1 WO 2007073662 A1 WO2007073662 A1 WO 2007073662A1 CN 2006003337 W CN2006003337 W CN 2006003337W WO 2007073662 A1 WO2007073662 A1 WO 2007073662A1
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WO
WIPO (PCT)
Prior art keywords
foundation
high vacuum
soft soil
pile foundation
soft
Prior art date
Application number
PCT/CN2006/003337
Other languages
English (en)
French (fr)
Inventor
Shilong Xu
Original Assignee
Shanghai Harbour Soft Soil Treatment Engineering Co. Ltd.
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 Shanghai Harbour Soft Soil Treatment Engineering Co. Ltd. filed Critical Shanghai Harbour Soft Soil Treatment Engineering Co. Ltd.
Publication of WO2007073662A1 publication Critical patent/WO2007073662A1/zh

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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
    • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • 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
    • E02D3/08—Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
    • 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 invention relates to the technical field of ground treatment, in particular to a soft ground treatment method, and more particularly to a fast "high vacuum compaction, pile foundation" composite combining a high vacuum compaction method and a pile foundation method.
  • Soft ground processing method Background technique
  • the soft foundation treatment method is to achieve the rapid improvement of the shallow layer (within 10m) soft foundation bearing capacity by eliminating the high-vacuum combined with the compaction (strong or vibratory rolling) crossover action. Part of the after-work or differential settlement.
  • the rapid " ⁇ ⁇ ⁇ ⁇ " soft foundation treatment method alone is difficult to meet the design in bearing capacity, post-work or differential settlement. Claim.
  • the soft foundation is also treated by the pile foundation method, that is, the gravel is filled in the soft soil and then compacted into a pier, or the immersed tube method is used to form a gravel column, or the cement soil is used to stir the pile. Due to the low frictional resistance of the weak soil between the pile foundations, the bearing capacity of the pile foundation is extremely low, and the post-construction settlement is large. The difference of each pile foundation is large, and there are many construction safety hazards.
  • the object of the present invention is to overcome the deficiencies of the above-described soft ground treatment method, and to provide a rapid soft foundation treatment method which can effectively increase the bearing capacity of the foundation quickly and with a small after-work or differential settlement.
  • the rapid soft foundation treatment method of the present invention employs a high vacuum compaction method in combination with a pile foundation method to form a composite foundation.
  • the ⁇ vacuum compaction method is to insert a well point pipe in a soft soil matrix (pitch 0.5 ⁇ 5 m), and the upper end of the well point pipe is connected to the vacuum system by a horizontal pipe to vacuum pump the soft soil, and then the well point is removed.
  • the pipe is crossed for several times (usually 1 to 8 passes).
  • the pile foundation method is to fill the soft soil with gravel and then hit the dense pier, or use the immersed pipe method to form a gravel column, or use cement soil to stir into piles.
  • the advantage of the "high vacuum compaction, pile foundation" composite rapid soft foundation treatment method of the present invention is that the high vacuum compaction method and the pile foundation method can advantageously interact, that is: the pile foundation can be improved in soft soil.
  • the effective drainage channel increases the drainage effect of the vacuum in the soft soil, which is conducive to the accelerated consolidation of the soft soil.
  • the vacuum pumping and compacting operations can greatly improve the frictional resistance between the pile foundations, and increase the density of the pile foundation itself, thereby improving the single pile.
  • the bearing capacity at the same time, by controlling the length and spacing of the pile foundation, the "high vacuum compaction" deep soft soil or differential settlement is controlled.
  • the well point pipe is densely distributed in the soft soil, and distributed according to a 0.5 ⁇ 5m pitch matrix, and the upper end of the well point pipe is connected to the horizontal pipe by the horizontal pipe.
  • the vacuum pump actively reduces the water content of the soft soil by means of vacuum pumping (hole water pressure); then removes the well point pipe and reduces the soft soil void ratio by hitting, including strength or vibration rolling; thus, the well point pipe Vacuuming and compacting the cross-action 1 ⁇ 8 times; then, using the gravel in the soft soil and then hitting the dense pier, or using the immersed tube method to form the gravel column, or using the cement soil to stir into the pile, and finally forming the composite foundation.
  • vacuum pumping hole water pressure
  • the soft soil treatment and the pile foundation work together, the cost is saved by more than 30%, the i period is shortened by about 50%, and the bearing capacity and workmanship After or differential settlement is evenly controllable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (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)
  • Piles And Underground Anchors (AREA)

Description

快速 "高真空击密、 桩基"复合软地某处理方法 技术领域
本发明涉及属于地基处理技术领域， 具体涉及一种软地基的处理方法， 更具体地， 是 关于一种将高真空击密方法与桩基法相结合的快速 "高真空击密、 桩基"复合软地基处理 方法。 背景技术
目前大面积软弱地基处理一般采用快速 "高真空击密 "软地基处理方法（中国专利号：
ZL01127046.2 快速 "高真空击密" 软地基处理方法是通过数遍高真空结合击密（强劣 或振动碾压）交叉作用， 来达到快速提高浅层（10m内）软地基承载力， 消除部分工后或 差异沉降之目的。 但大量的工程中， 由于软弱土层厚度较深， 并且厚度差异较大， 单独采 用快速 "髙真空击密 "软地基处理方法， 在承载力、 工后或差异沉降等各方面都难以满足 设计要求。
另一方面， 软弱地基也有采用桩基法处理， 即采用在软土中填入碎石再击密成墩， 或 采用沉管法成碎石柱， 或采用水泥土搅拌成桩。 由于其各桩基间软弱土的摩擦阻力较低， 使得桩基的承载力极低，并且工后沉降较大，每个桩基的差异性较大，施工安全隐患较多。 发明目的
本发明的目的就在于克服上述软地基处理方法所存在地不足，从而提供一种能有效快 速提高地基承载力， 且工后或差异沉降小的快速软地基处理方法。 发明概要
为实现上述目的，本发明的快速软地基处理方法是采用高真空击密法结合桩基法以形 成复合地基。
所述髙真空击密法是采用在软土中矩阵（间距 0.5〜5米）插入井点管， 井点管的上 端以卧管连接至抽真空系统对软土进行真空抽水、然后拔除井点管进行击密的数遍（通常 是 1〜8遍）交叉作业。
所述桩基法是采用在软土中填入碎石再击密成墩， 或采用沉管法成碎石柱， 或采用水 泥土搅拌成桩。 通过控制调整真空抽水、击密交叉作业的遍数及碎石墩 /桩或水泥土桩的长度和间距， 能够达到设计所需的高承载力、 高精度控制工后及差异沉降要求。
本发明的 "高真空击密、 桩基"复合的快速软地基处理方法的优点在于， 高真空击密 法与桩基法之间能够有利地相互作用， 即： 桩基在软土中能够提高有效排水通道， 增加真 空在软土的排水效果， 有利于软土的加快固结； 同时真空抽水、 击密作业能使桩基间的摩 擦阻力大大提高，桩基自身密度提高，从而提高单桩的承载力； 同时通过控制桩基的长度、 间距， 使 "高真空击密"深层软土工后或差异沉降得到了控制。 具体实施方式
某 10万 m3的贮油罐工程， 原设计 1.2的碎石柱， 但施工后差异性较大， 单柱承载力 低， 工后沉降难以控制。
后采用本发明的 "高真空击密、 桩基"复合的快速软地基处理方法， 首先在软土中密 布井点管， 按 0.5〜5m间距矩阵分布， 井点管的上端用卧管连接至真空泵， 通过抽真空的 方法主动降低软土含水量（孔压水）； 然后拔除井点管， 通过击密， 包括强劣或振动碾压， 来减小软土空隙比； 如此， 井点管抽真空、 击密交叉作用 1〜8遍； 然后， 采用在软土中 填入碎石再击密成墩， 或采用沉管法成碎石柱， 或采用水泥土搅拌成桩， 最后形成复合地 基。
采用本发明的 "高真空击密、 桩基"复合的快速软地基处理方法， 使软土处理和桩 基共同作用， 造价节约了 30%以上， i期缩短约 50%， 并且承载力、 工后或差异沉降都 均匀可控。

Claims

权利要求书
1、一种软地基处理方法， 其特征在于： 该方法是采用高真空击密法结合桩基法—以形 成复合地基。
2、 如权利要求 1所述的方法， 其特征在于： 所述高真空击密法是采用在软土中矩阵 插入井点管对软土进行真空抽水、 然后拔除井点管进行击密的数遍交叉作业。
3、如权利要求 2所述的方法，其特征在于:所述矩阵插入的井点管的分布间距为 0.5〜 5米。
4、 如权利要求 2所述的方法， 其特征在于： 所述交叉作业的遍数为 1〜8遍。
5、 如权利要求 1所述的方法， 其特征在于： 所述桩基法是采用在软土中填入碎石再 击密成墩， 或采用沉管法成碎石柱， 或采用水泥土搅拌成桩。
6、 如权利要求 2或 5所述的方法， 其特征在于： 所述击密包括强夯或振动碾压。
PCT/CN2006/003337 2005-12-29 2006-12-08 Procede de traitement rapide de fondations sur sol mou par densification a vide eleve en combinaison avec un procede de fondations empilees WO2007073662A1 (fr)

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CNB2005101349665A CN100359100C (zh) 2005-12-29 2005-12-29 快速“高真空击密、桩基”复合软地基处理方法
CN200510134966.5 2005-12-29

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101660312B (zh) * 2009-09-11 2011-05-11 朱奎 加筋水泥搅拌桩复合地基处理及施工方法
CN102966097A (zh) * 2012-11-30 2013-03-13 华侨大学 一种新型竖向承载桩复合地基
CN103015396A (zh) * 2012-12-21 2013-04-03 王强 软土地基施工方法
CN115045262A (zh) * 2022-06-10 2022-09-13 中国建筑一局(集团)有限公司 岩溶地貌高填覆地基桩基施工方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100532729C (zh) * 2007-06-28 2009-08-26 刘汉龙 浅层振夯击密与深层爆炸挤密联合高真空井点降水地基处理方法
CN101806055B (zh) * 2009-02-13 2011-09-21 梁闽 真空预压联合刚性桩复合地基加固方法
CN102011391B (zh) * 2010-11-11 2012-01-11 河北建设勘察研究院有限公司 一种软弱地基的加固处理方法
CN102926393A (zh) * 2012-11-22 2013-02-13 河海大学 一种处理建筑地基液化的真空抽水装置及施工方法
CN103669331A (zh) * 2013-12-25 2014-03-26 中国铁道科学研究院铁道建筑研究所 高速铁路流塑状软土地基加固方法
CN104060624A (zh) * 2014-06-30 2014-09-24 温州电力设计有限公司 复杂软土地基中桩基的设置方法
CN110904944A (zh) * 2019-11-18 2020-03-24 何小钟 一种湿软土地基的处理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487524A (en) * 1981-09-22 1984-12-11 Fudo Construction Co., Ltd. Method and apparatus of forming sand piles for improving a soft ground
CN1121973A (zh) * 1994-05-13 1996-05-08 顾叙根 挤密碎石桩与混凝土灌注桩的双重复合地基及其施工方法
JP2000319865A (ja) * 1999-05-11 2000-11-21 Fudo Constr Co Ltd 地盤強化複合工法
CN1330189A (zh) * 2001-07-28 2002-01-09 徐士龙 快速“高真空击密法”软地基处理工法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86200550U (zh) * 1986-08-12 1987-04-01 上海铁路局科学技术研究所 加固软土地基的钢渣挤密桩
CN1021982C (zh) * 1991-06-26 1993-09-01 黄正轩 房屋倾斜纠偏加固的方法
CN1098156A (zh) * 1993-07-26 1995-02-01 建设部综合勘察研究院 碎石挤密强夯法
JP3723460B2 (ja) * 2001-02-16 2005-12-07 株式会社間組 真空圧密による地盤改良工法及びその施工構造
CN1584220A (zh) * 2003-08-18 2005-02-23 梁闽 自锚真空压密刚性桩复合地基综合处理法
CN1584221A (zh) * 2004-06-16 2005-02-23 周健 浅层软土地基快速动力固结技术
CN1293263C (zh) * 2004-11-25 2007-01-03 徐士龙 新型高真空变能量交叉击密软地基处理的方法
CN1609345A (zh) * 2004-11-25 2005-04-27 徐士龙 高真空变能量交叉击密软地基处理的方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487524A (en) * 1981-09-22 1984-12-11 Fudo Construction Co., Ltd. Method and apparatus of forming sand piles for improving a soft ground
CN1121973A (zh) * 1994-05-13 1996-05-08 顾叙根 挤密碎石桩与混凝土灌注桩的双重复合地基及其施工方法
JP2000319865A (ja) * 1999-05-11 2000-11-21 Fudo Constr Co Ltd 地盤強化複合工法
CN1330189A (zh) * 2001-07-28 2002-01-09 徐士龙 快速“高真空击密法”软地基处理工法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
XU S. ET AL.: "Practical Example of High Vacuum Compacting Method Consolidating Dredge Fill Fly Ash Foundation", COALASH CHINA, vol. 16, no. 92, December 2004 (2004-12-01), pages 19 - 21 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101660312B (zh) * 2009-09-11 2011-05-11 朱奎 加筋水泥搅拌桩复合地基处理及施工方法
CN102966097A (zh) * 2012-11-30 2013-03-13 华侨大学 一种新型竖向承载桩复合地基
CN103015396A (zh) * 2012-12-21 2013-04-03 王强 软土地基施工方法
CN115045262A (zh) * 2022-06-10 2022-09-13 中国建筑一局(集团)有限公司 岩溶地貌高填覆地基桩基施工方法
CN115045262B (zh) * 2022-06-10 2024-04-09 中国建筑一局(集团)有限公司 岩溶地貌高填覆地基桩基施工方法

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CN100359100C (zh) 2008-01-02
CN1793519A (zh) 2006-06-28

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