微型桩杆塔基础水平承载力计算方法研究  

Experimental study on design method of horizontal bearing capacity of micropiles for transmission tower

作　　者：苏荣臻[1] 盛孝芳 曲勇[3] 

机构地区：[1]中国电力科学研究院,北京100055 [2]东北电业管理局送变电工程公司,辽宁沈阳110021 [3]广东电网公司佛山供电局,广东佛山528200

出　　处：《四川建筑科学研究》2013年第2期182-184,共3页Sichuan Building Science

基　　金：国家电网公司科学技术项目(SGKJ[2007]1022)

摘　　要：通过现场原型试验,对微型桩杆塔基础的水平承载力计算方法进行研究,研究表明:应用于输电线路工程的微型桩基础,微型桩单桩一般采用水平允许位移控制确定其水平承载力设计值,可采用现场试验结果反算得到m值,进而进行单桩水平承载力设计值的计算;微型桩群桩水平承载力可通过单桩水平承载力乘以桩数和水平群桩效应系数得到,水平群桩效应系数只考虑桩的互相影响效应和桩顶约束效应。只要选用合理的设计参数,可采用本文提供的设计方法进行微型桩杆塔基础水平承载力的初步设计。Field tests are done to study the horizontal design method of micropiles for transmission tower.Study shows： the calculating of horizontal bearing capacity of single micropile is suitable to determine by horizontal allowable displacement,the value of ＂m＂ can be calculated by the test results,which can be used to calculate the horizontal bearing capacity of single micropile;the horizontal bearing capacity of micropile group is the product of the horizontal bearing capacity of single micropile,the number of single pile and the horizontal pile group effect coefficient,which is product of pile interact coefficient and pile top restrict coefficient.If the reasonable design parameters were chozen,the horizontal bearing capacity of micropile foundation could be designed preliminarily.

关 键 词：现场试验 微型桩 群桩效应系数 设计方法 杆塔 

分 类 号：TU473.11[建筑科学—结构工程]