钻孔灌注桩孔壁稳定性分析

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摘要采用有限元数值模拟与有限元强度折减法，研究土体性质、泥浆相对密度、孔深、孔半径等因素对钻孔灌注桩孔壁稳定性的影响。研究结果表明：(1) 黏性土地基中孔壁稳定性问题主要是缩径问题，土质越差、孔半径越大或孔越深，缩径量越大，提高泥浆相对密度能有效地减小缩径量；(2) 砂土地基中孔壁稳定性问题主要是坍孔问题，孔壁土体产生一定的塑性区后，很容易发生破坏，同时这种破坏会向四周蔓延扩散，最终形成坍孔。影响砂土地基孔壁稳定性的主要因素是泥浆相对密度，为保证孔壁稳定，砂土地基中最小泥浆相对密度应使得泥浆侧压力不小于土体静止侧压力。研究成果可为软土地基中钻孔灌注桩设计与施工提供参考。

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关键词 ：桩基工程, 钻孔灌注桩, 孔壁稳定性, 有限元, 强度折减法, 缩径, 坍孔

Abstract：By the methods of finite element numerical simulation and finite element strength reduction，the influences of soil properties，relative density of mud，hole depth and hole radius on the stability of bored pile hole-wall are analyzed. The analysis results are shown as follows：(1) The major problem of stability of bored pile hole-wall in clay is hole shrinkage. The poorer the properties of clay are or the deeper and bigger the hole are，more serious the phenomenon of hole shrinkage is. The dense mud can reduce the size of hole shrinkage effectively. (2) The major problem of stability of bored pile hole-wall in sand is collapsing and the relative density of mud is the major influencing factor. When plastic zones appear in the hole-wall soil，the soil is easy to be destroyed and the failure will spread to all around the plastic zone；finally，the hole collapses. In order to prevent collapsing，the relative density of mud should be heavy enough to make sure the lateral pressure of mud is not less than static lateral pressure of soil. The research results can provide references for the design and construction of bored piles in soft soil.

Key words： pile foundations bored pile stability of hole-wall finite element strength reduction method hole shrinkage collapsing

收稿日期: 2011-02-24

引用本文:

王云岗1，2，章光1，胡琦3. 钻孔灌注桩孔壁稳定性分析[J]. 岩石力学与工程学报, 2011, 30(S1): 3281-3287.
WANG Yungang1，2，ZHANG Guang1，HU Qi3. ANALYSIS OF STABILITY OF BORED PILE HOLE-WALL. , 2011, 30(S1): 3281-3287.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/IS1/3281

[17]	刘国彬，侯学渊. 软土的卸荷模量[J]. 岩土工程学报，1996，18(6)：18-23.(LIU Guobin，HOU Xueyuan. Unloading modulus of soft soil[J]. Chinese Journal of Geotechnical Engineering，1996，18(6)：18-23.(in Chinese))
[1]	石得权，刘刚. 钻孔孔壁坍塌掉块现象的分析研究及处理[J]. 西部探矿工程，2004，16(7)：124-125.(SHI Dequan，LIU Gang. Research and treatment of borehole walls? collapse and landslide accidents[J]. West-China Exploration Engineering，2004，16(7)：124-125.(in Chinese))
[4]	刘之葵，梁金城，黄英娣. 人工挖孔灌注桩的孔壁稳定性[J]. 矿产与地质，2003，17(5)：648-650.(LIU Zhikui，LIANG Jincheng，HUANG Yingdi. Stability of hole-wall in aritificial drill hole piles[J]. Mineral Resources and Geology，2003，17(5)：648-650.(in Chinese))
[6]	陈国灿. 钻孔灌注桩孔壁稳定的条件[J]. 长春工程学院学报：自然科学版，2002，3(3)：36-39.(CHEN Guocan. The conditions of keeping the hole-wall of bored holes from yielding[J]. Journal of Changchun Institute of Technology：Natural Science，2002，3(3)：36-39.(in Chinese)) " target="_blank">
[2]	李小青，乌效鸣. 钻孔灌注桩孔壁稳定性分析[J]. 地质与勘探，2001，37(2)：74-76.(LI Xiaoqing，WU Xiaoming. Analysis of stability of hole-wall of bored pile[J]. Geology and Prospecting，2001，37(2)：74-76.(in Chinese)) " target="_blank">
[8]	薛金贤. 钻孔灌注桩孔半径变化规律研究[硕士学位论文][D]. 上海：同济大学，2007.(XUE Jinxian. Research on pore radius variation rule of bored cast-in-place pile[M. S. Thesis][D]. Shanghai：Tongji University，2007.(in Chinese)) " target="_blank">
[10]	王云岗. 结构性软土地基中深基坑工作机制研究[博士学位论文][D]. 武汉：武汉理工大学，2010.(WANG Yungang. Study of working mechanism of deep foundation pit in structural soft soil[Ph. D. Thesis][D]. Wuhan：Wuhan University of Technology，2010.(in Chinese)) " target="_blank">
[11]	郑颖人. 岩土材料屈服与破坏及边(滑)坡稳定分析方法研讨——“三峡库区地质灾害专题研讨会”交流讨论综述[J]. 岩石力学与工程学报，2007，26(4)：649-661.(ZHENG Yingren. Discussion on yield and failure of geomaterials and stability analysis methods of slope/landslide—communion and discussion summary of special topic forum on geologic disasters in the Three Gorges project region[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(4)：649-661.(in Chinese))
[15]	胡琦. 超深基坑水、土与围护结构相互作用及设计方法研究[博士学位论文][D]. 杭州：浙江大学，2008.(HU Qi. Study of design method and water-soil-retaining structure interaction of ultra-deep foundation pit[Ph. D. Thesis][D]. Hangzhou：Zhejiang University，2008.(in Chinese)) " target="_blank">
[18]	刘国彬，刘金元，徐全庆. 基坑开挖引起的土体力学特性变化的试验研究[J]. 岩石力学与工程学报，2000，19(1)：112-116.(LIU Guobing，LIU Jinyuan，XU Quanqing. Testing study of variation of mechanical characteristics of soil due to foundation pit excavation[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(1)：112-116.(in Chinese))
[5]	唐宏. 钻孔桩泥浆对孔壁稳定性及极限孔深的影响[J]. 山西建筑，2005，31(7)：85-86.(TANG Hong. Influence of mortar of hole-digging pile to hole wall stability and limit hole depth[J]. Shanxi Architecture，2005，31(7)：85-86.(in Chinese))
[9]	李尚飞，黄安芳，鲁嘉，等. 钻孔灌注桩成孔孔径变化及其卸荷效应机制研究[J]. 建筑科学，2010，26(1)：76-80.(LI Shangfei，HUANG Anfang，LU Jia，et al. Research on mechanisms of variation on diameter of cavities of cast-in-place bored piles and its unloading effect[J]. Building Science，2010，26(1)：76-80.(in Chinese)) " target="_blank">
[13]	韦立德，陈从新，徐健，等. 考虑渗流和锚固作用的强度折减有限元法研究[J]. 岩石力学与工程学报，2008，27(增2)：3 471-3 476. (WEI Lide，CHEN Congxin，XU Jian，et al. Study of strength reduction finite element method(FEM) considering seepage and anchoring[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(Supp.2)：3 471-3 476.(in Chinese))
[3]	胡晓敏，李之达. 厚冲积覆盖层地区桥梁钻孔灌注桩成孔的力学分析[J]. 武汉理工大学学报：交通科学与工程版，2007，31(4)：734-737.(HU Xiaomin，LI Zhida. Hole forming mechanics analysis of the bored filling pile on the bridges in thick alleviation overlying area[J]. Journal of Wuhan University of Technology：Transportation Science and Engineering，2007，31(4)：734-737.(in Chinese))
[7]	时仓艳. 钻孔灌注桩孔壁稳定性分析及后压浆应用研究[硕士学位论文][D]. 南京：东南大学，2006.(SHI Cangyan. Analysis of stability of bored piles hole-wall and its application to base post-grouting[M. S. Thesis][D]. Nanjing：Southeast University，2006.(in Chinese)) " target="_blank">
[12]	许强，张登项，郑光. 锦屏I级水电站左岸坝肩边坡施工期破坏模式及稳定性分析[J]. 岩石力学与工程学报，2009，28(6)：1 183-1 192.(XU Qiang，ZHANG Dengxiang，ZHENG Guang. Failure mode and stability analysis of left bank abutment high slope at Jinping I hydropower station in construction period[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(6)：1 183-1 192.(in Chinese)) " target="_blank">
[16]	袁静，刘兴旺，益德清. 基坑开挖过程中m参数的选取分析[J]. 工业建筑，2000，30(9)：46-51.(YUAN Jing，LIU Xingwang，YI Deqing. Determination of parameter m during foundation pit excavation[J]. Industrial Construction，2000，30(9)：46-51.(in Chinese))
[19]	张广兴. 泥皮性状对钻孔桩工程特性的影响研究[硕士学位论文][D]. 杭州：浙江大学，2006.(ZHANG Guangxing. Study of the influence of mudcake on engineering behavior of bored pile[M. S. Thesis][D]. Hangzhou：Zhejiang University，2006.(in Chinese)) " target="_blank">
[14]	郑颖人，邱陈瑜，张红，等. 关于土体隧洞围岩稳定性分析方法的探索[J]. 岩石力学与工程学报，2008，27(10)：1 968-1 980.(ZHENG Yingren，QIU Chenyu，ZHANG Hong，et al. Exploration of stability analysis methods for surrounding rocks of soil tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(10)：1 968-1 980.(in Chinese))