大方老城区地表建筑物变形机制讨论林德洪 田维强 胡丽 摘要：本文通过对讨论区地表裂缝、地下水位、深部位移的监测，结合大量的现场调查和试验综合分析，认为引发讨论区域地表建筑开裂变形的主要因素不是斜坡蠕滑变形，而是地下水动态变化因素引起的。讨论结果表明具体影响因素有两点：一是近年来工程活动加剧地下水位的变化速率和频率，使原来就存在的不均匀沉降现象变得更加剧烈，致该区土层产生颗粒结构变化、土体强度变化;二是发生开裂变形的房屋其基础均为浆砌石条形基础，且基础宽度和埋深多数没有达到法律法律规范要求的理论值。Abstract： Based on the monitoring of surface cracks， groundwater level and deep displacement in the study area， combined with a large number of field investigations and comprehensive analysis of tests， we concluded that the main factor causing surface building cracking and deformation in this area is not creeping deformation of slope， but groundwater dynamic variation. The research results show that there are two specific factors： firstly， in recent years， engineering activities have intensified the change rate and frequency of groundwater level， which makes the original existence of uneven sedimentation phenomenon more severe， resulting in the change of grain structure and soil strength of soil layer; secondly， the foundation of cracked and deformed buildings is slurry masonry strip-shaped base， and most of the foundation width and buried depth do not reach the theoretical value required by the code.关键词：大方县;地下水位动态变化;地表建筑物变形;不均匀沉降Key words： Dafang County;groundwater dynamic variation;surface building deformation;uneven sedimentation中图分类号：TD823.7 文献标识码：A 文章编号：1006-4311（2024）28-0132-020 引言资料[1，2，3，4]显示，在大方县城斜坡区并不是到了上世纪 90 年代初才开始出现地表建筑开裂变形现象，而是在上世纪 90 年代初出现较为严重的地表建筑开裂变形现象，并引起居民们的重视。进一步...
