预制桩施工对周围环境影响的试验研究及保护措施  

Experimental Study and Protection Measures of Precast Pile Construction Effect on Surrounding Environment

作　　者：李富荣[1,2] 孙伟 杨斌[1] 聂军旗[1] 

机构地区：[1]盐城工学院土木工程学院,江苏盐城224051 [2]南京工业大学岩土工程研究所,南京210009 [3]盐城市亭湖区交通运输局,江苏盐城224000

出　　处：《工业安全与环保》2014年第5期37-40,共4页Industrial Safety and Environmental Protection

基　　金：住房和城乡建设部科技项目(2010-K3-6;2013-K3-18)

摘　　要：采用模型试验,基于3×3预制群桩,模拟了预制桩的施工过程,研究了周围土体变形和孔隙水压力的变化规律。试验结果表明,沉桩过程中,桩区内外地表土体水平变形和隆起变形表现出不同的变化规律,孔隙水压力是不断增大的,桩底孔压大于桩身中部孔压,在桩区外,孔隙水压力随着径向距离的增加呈指数减小。就影响范围而言,预制桩施工的影响范围达到1倍桩长左右。试验结果对软土地区预制桩施工具有实践意义和指导价值。Based on 3 x 3 precast group pile and using the model experiment, the construction process of precast piles is simulated, the variation of the deformation and pore water pressure of surrounding soil is studied. The experiment results show that, the surface horizontal deformation and upheaval deformation shows a different variation in piling area and outside during the process of pile driving, the pore water pressure is increased gradually, and the pore pressure of pile bottom is greater than that of pile middle; with the increase of the radial distance, the pore water pressure exponentially decreases outside the piling area. For the influence scope, the influence scope of precast pile construction is about 1 time of the pile length. The experiment results have important practical significance and guiding value on precast pile construction in soft soil area.

关 键 词：预制桩 环境 变形 孔隙水压力 试验 

分 类 号：TU753.3[建筑科学—建筑技术科学]