不同嵌固深度排桩受力与变形特性现场试验研究

左殿军; 邓成发

doi:10.11779/CJGE2014S2062

不同嵌固深度排桩受力与变形特性现场试验研究 English Version

左殿军^{1, 2},
邓成发³

1. 交通运输部天津水运工程科学研究所岩土工程研究中心,天津 300456;
2. 河海大学岩土工程科学研究所,江苏南京 210098;
3. 浙江省水利河口研究院岩土工程研究所,浙江杭州 310020

详细信息

作者简介:
左殿军(1983- ),男,河南信阳人,博士研究生,工程师,主要从事软土地基加固处理技术、重金属污染土治理与控制技术方面的研究。E-mail: zdj647@163.com。

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出版历程
- 收稿日期: 2014-07-27
- 发布日期: 2014-07-27

Field test on mechanical properties and deformation characteristics of double-row piles with different embedded depths

ZUO Dian-jun^{1, 2},
DENG Cheng-fa³

1. Geotechnical Engineering Research Center, Tianjin Research Institute for water transport engineering, M.O.T., Tianjin 300456, China;
2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China;
3. Geotechnical Research Institute, Zhejiang institute of Hydraulics＆Estuary, Hangzhou 310020, China.

摘要

摘要: 根据某一水闸基坑开挖工程,在排桩桩体内埋设测斜仪、钢筋应力计对非等长双排桩基坑支护结构变形特性进行了现场观测,采用规范法讨论了后排桩不同嵌固对前、后排桩的变形、内力影响。研究结果表明：非等长双排桩桩顶位移、桩身剪力、弯矩与传统等长双排桩基坑支护结构规律一致;增大后排桩的嵌固深度,前、后排桩的桩顶位移均减小;前排桩桩身剪力、弯矩减小,后排桩增大,但当嵌固深度超过桩长3/4时,前、后排桩的桩顶水平位移、桩身剪力、弯矩减小或增大趋势均不明显;研究成果为双排桩基坑支护结构设计优化提供一定参考。
- 嵌固深度 /
- 双排桩 /
- 支护结构 /
- 变形特性 /
- 现场试验
Abstract: Based on excavation of foundation pit for a sluice in Zhejiang Province, field tests on deformation characteristics of retaining structure with non-equal-length double-row piles are performed by burying inclinometers and reinforcement stress meters in row piles. The influences of the mounted depth of back row piles are discussed by using the elastic foundation beam method. The results indicated that: the change laws of top displacement, pile shear and bending moment of double piles are consistent with those of equal-length double-row piles. With the increase of the embedded depth of back row piles, the top horizontal displacement of front and back row piles decreases. The shear force and bending moment of front row piles decrease, while those of back row piles increase. When the embedded depth is more than 3/4 of the pile length, the decrease or increase trend of top horizontal displacement, shear force and bending moment of piles are not obvious. These achievements may provide certain reference for the design optimization of supporting structures for foundation pits with double-row piles.
- embedded depth /
- double-row pile /
- supporting structure /
- deformation characteristic /
- field test

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参考文献(15)

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