混凝土预制减沉桩在软粘土地基处理中的应用  

Application of precast concrete settlement-reducing pile in soft clay foundation treatment

作　　者：李卫鹏[1] LI Wei-peng(Xinjiang Survey and Design Institute for Water Resources and Hydropower,Urumqi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院,乌鲁木齐830000

出　　处：《广西水利水电》2018年第3期57-60,共4页Guangxi Water Resources & Hydropower Engineering

摘　　要：为了避免新疆某拟建平原水库工程涵洞坝段加固处理后的复合地基沉降量和两侧普通坝段天然地基沉降差异过大,进而导致坝体沿着沉降差异较大部位产生剪切破坏,在涵洞两侧一定范围内的普通坝段地基布设了混凝土预制减沉桩。采用等效作用分层总和法,分别对预制桩处理后的涵洞坝段和采用了减沉桩处理的两侧坝段进行了桩土复合地基沉降计算。计算结果表明:涵洞两侧一定范围内的普通坝段地基采用减沉桩处理后,涵洞坝段和两侧坝段地基沉降量沿坝轴线方向沉降差异变小,沉降得到了均匀过渡,避免了坝体产生剪切破坏。该方法可供类似地基处理参考。For a reservoir to be constructed on a plain in Xinjiang, there may be too big difference between the composite foundation settlement at the reinforced culvert dam segment and the natural foundation settlement at the ordinary dam segments on both sides. In order to avoid the possible shear failure due to this big settlement difference along dam axis, precast concrete settlement-reducing piles were designed within certain dam segments on both sides of the culvert segment. Calculation of pile-soil composite foundation settlement was conducted by equivalent layering summation method. The results of calculation demonstrate that after the ordinary dam segments on both sides were designed with settlement-reducing piles, the settlement difference along dam axis decreases, rendering uniform transition of settlement and avoiding shear failure.

关 键 词：软粘土地基 地基处理 减沉桩 等效作用分层总和法 群桩沉降计算 

分 类 号：TU473.1[建筑科学—结构工程]