素混凝土桩复合地基在水平荷载作用下的工作性能  

Working Mechanics of Plain Concrete Piles Composite Foundation under Horizontal Loads

作　　者：王凤池[1] 翟华[2] 吕毅兰 燕晓[4] 刘涛[4] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116024 [2]辽宁经济管理干部学院,辽宁沈阳110122 [3]沈阳市万隆照明工程有限公司,辽宁沈阳110001 [4]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2008年第4期533-536,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省博士启动基金项目(20061001);建设部科技计划项目(06-K1-6)

摘　　要：目的为了研究素混凝土桩复合地基在水平荷载作用下的工作性能.方法采用模型试验,测定了不同褥垫层厚度、不同上部荷载等情况下,增强体水平位移和褥垫层水平破坏荷载.结果当竖向压力为200 kPa时,随着桩身入土深度的增加,桩身水平变形在逐渐减小,桩底位移与水平加载方向相反;随着褥垫层厚度增加,桩身水平位移减小;当褥垫层厚度为200 mm时,桩身水平位移随竖向荷载的增加而减小.结论水平荷载作用下,褥垫层厚度和上部荷载是影响增强体水平位移的主要因素之一.当褥垫层达到破坏荷载时,上部结构在褥垫层处产生滑移,据此初步建立了上部结构在滑移状态下的计算模型.In order to study the behaviors of plain concrete piles composite foundation under horizontal load, a model experiment was conducted to measure horizontal displacement of pile and failure load cushion under different cushion thicknesses and vertical loads. Under the 200kPa vertical load, with the increase of depth and cushion thickness, the pile horizontal displacements became smaller. Pile - end displacement has negative direction against horizontal load. When the cushion thickness was 200mm, pile horizontal displacement became smaller with vertical load increasing. Testing results show that cushion thickness and vertical load are the major factors that influence the pile horizontal displacement. With cushion failure, superstructure slipped. A calculating model is preliminarily set up based on results above.

关 键 词：素混凝土桩 复合地基 水平荷载 位移 

分 类 号：TU411.3[建筑科学—岩土工程]