基坑开挖对邻近杆塔基础变形影响及保护措施研究  

INFLUENCE OF FOUNDATION PIT EXCAVATION ON DEFORMATION OF ADJACENT TOWER AND ITS PROTECTION MEASURES

作　　者：刘燕平 楼佳悦 李毅 杨继平 LIU Yanping;LOU Jiayue;LI Yi;YANG Jiping(Zhejiang Huayun Power Engineering Design Consulting Co.,Ltd.,Hangzhou 310014,China)

机构地区：[1]浙江华云电力工程设计咨询有限公司,杭州310014

出　　处：《低温建筑技术》2020年第12期131-134,共4页Low Temperature Architecture Technology

摘　　要：邻近杆塔基础的深大基坑工程施工势必会对既有杆塔基础产生一定的不利影响。文中基于PLAXIS有限元数值计算分析平台,采用考虑土体小应变特性的土体本构模型,研究了深大基坑工程施工对邻近既有杆塔基础变形的影响,并在此基础上引入了隔离桩保护措施以控制坑外杆塔基础的变形。研究表明隔离桩能够有效控制基坑卸荷作用所引起的邻近杆塔基础的侧向变形、沉降及不均匀沉降,而且控制效果十分显著。The construction of deep and large foundation pits project adjacent to the tower foundation inevitably has a certain adverse effect on the existing tower foundation.In this paper,the soil constitutive model considering the small strain characteristics of the soil is used to study the effect of deep and large foundation pit construction on the deformation of the adjacent existing tower foundation based on the PLAXIS finite element numerical calculation and analysis platform.Furthermore,the protective measures of isolation piles are introduced to control the deformation of the tower foundation outside the pit.The results show that the isolation piles can effectively control the lateral deformation,total settlement,and uneven settlement of the adjacent tower foundation caused by the unloading of the foundation pit.

关 键 词：杆塔基础 基坑开挖 隔离桩 不均匀沉降 

分 类 号：TU470[建筑科学—结构工程]