贵州省大方县北大桥不稳定斜坡变形破坏特征及成因分析
ANALYSIS OF DEFORMATION AND FAILURE CHARACTERISTICS AND CAUSES OF THE UNSTABLE SLOPE OF BEIDA BRIDGE IN DAFANG COUNTY,GUIZHOU PROVINCE
何正勇 1张中 2孙俊 1韦猛3
作者信息
- 1. 贵州地矿基础工程有限公司,贵阳 550081
- 2. 广州市建筑集团有限公司,广州 510030;广州市盾建建设有限公司,广州 511400
- 3. 成都理工大学,成都 610059
- 折叠
摘要
大方县地形切割剧烈,城区不稳定斜坡有变形为滑坡地质灾害的风险.为查明大方县城北大桥斜坡变形破坏特征和成因,本文开展了斜坡的地质环境条件调查,并对斜坡物质组成及房屋开裂成因展开了分析.结果发现:区内出露的地层仅有Q4和P3l,将其划分为松散及软质两个工程地质岩组,坍塌、重力堆积下形成的滑坡体覆盖层较厚;斜坡变形破坏方式主要为地面开裂、建筑物墙体开裂、建筑物整体倾斜;引发斜坡变形既有内在因素,第四系松散覆盖层的分布不均及地下水位较浅,也有外在因素诱导,不合理的切填方、建筑物加载工程引起动水压力变化成为外部动力条件.
Abstract
The terrain in Dafang County is cut sharply,and the unstable slopes in the urban area are at risk of deformation into landslide geological disasters.In order to investigate the deformation and failure characteristics and causes of the slope of the North Bridge in Dafang County,this article conducted a survey of the geological environmental conditions of the slope,and analyzed the material composition of the slope and the causes of house cracking.The results showed that the exposed strata in the area only include Q4 and P3l,which are divided into two engineering geological rock formations:loose and soft.The landslide body formed by collapse and gravity accumulation has a thick covering layer;the deformation and failure modes of the slope mainly include ground cracking,building wall cracking,and overall inclination of the building;the slope deformation is caused by both internal factors,such as uneven distribution of the Quaternary loose cover layer and shallow groundwater level,as well as external factors,such as unreasonable cutting and filling,and dynamic water pressure changes caused by building loading engineering as external dynamic conditions.
关键词
不稳定斜坡/变形破坏特征/物质组成/成因分析Key words
unstable slopes/deformation and failure characteristics/material composition/cause analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据