昆明某基坑项目锚索变刚度调平设计研究  

Study on variable stiffness leveling design of anchor cable in a foundation pit project

作　　者：孙浩 顾翔 孙显兵 闫冠宇 SUN Hao;CU Xiang;SUN Xianbing;YAN Guanyu(Survey and Design Institute of Nonferrous Geological Bureau of Yunnan Province,Kunming 651000,Yunnan,China;Southwest Nonferrous Kunming Exploration Surveying ANG Designing(institute)Inc.,Kunming 651000,Yunnan,China)

机构地区：[1]云南省有色地质局勘测设计院,云南昆明651000 [2]西南有色昆明勘测设计(院)股份有限公司,云南昆明651000

出　　处：《矿产勘查》2024年第S2期662-667,共6页Mineral Exploration

摘　　要：作为常用的支护结构,预应力锚索可划分为拉力型集中型、压力集中型、拉力分散型、压力分散型几种常用形式,拉力型锚索和压力型锚索由于构造不同,受力机理和刚度也不相同,而刚度是控制变形的关键因素,锚索刚度大变形小,反之变形大。本文根据拉力型和压力型锚索受力机理不同分别计算两类锚索刚度,最终在实际项目中采用压力型锚索刚度进行支护结构设计,并与支护结构实际监测变形对比,旨在为压力型锚索采用变刚度调平设计是安全、合理、可行提供依据,也为今后不同类型锚索设计提供了参考。As a commonly used support structure,prestressed anchor cables can be divided into several com-mon forms:tensile concentrated type,pressure concentrated type,tensile dispersed type,and pressure dispersed type.Due to their different structures,tensile anchor cables and pressure anchor cables have different stress mechanisms and stiffness,and stiffness is the key factor in controlling deformation.The stiffness of the anchor cable is large,and the deformation is small,and vice versa.This article calculates the stiffness of two types of anchor cables based on the different stress mechanisms of tension type and pressure type anchor cables.Finally,in practical projects,the stiffness of pressure type anchor cables is used for support structure design,and compared with the actual monitoring deformation of the support structure.The aim is to provide a basis for the safety,rational-ity,and feasibility of using variable stiffness leveling design for pressure type anchor cables,and also provide refer-ence for the design of different types of anchor cables in the future.

关 键 词：拉力型锚索 压力型锚索 刚度 变形 

分 类 号：TU470[建筑科学—结构工程]