真空联合堆载预压法处理大面积深厚软土填筑区工程沉降试验研究  

Experimental Study on the Settlement of Large-area Deep Soft Soil Filling Area Treated by Vacuum Combined Preloading Method

作　　者：谢显龙 XIE Xian-long(China Railway Fourth Survey and Design Institute Group Co.,Ltd.,Wuhan 430000,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430000

出　　处：《价值工程》2024年第9期111-115,共5页Value Engineering

基　　金：珠海A片区土地一级开发项目大面积深厚软土填筑区工程沉降试验测试研究项目(2015K84)。

摘　　要：本文以珠海西部中心城区白藤七路为研究对象,开展大面积深厚软土填筑区真空联合堆载预压试验和数值模拟,将实测数据和数值模拟结合,结果表明:大面积软基处理的影响范围超出常规建筑基础底面积,影响深度超过了塑料排水板的深度范围,其底部仍有部分少量沉降,但总沉降量的80%~90%仍集中在塑料排水板深度的50%以上位置。大面积软基处理过程中,在加固区边界1倍的排水板长度范围内水平位移值变化较大,1倍的排水板长度以外的周围土体水平位移呈现缓慢地衰减趋势;0.8倍的排水板深度范围内地表沉降变化较大,0.8倍的排水板深度以外的周围土体地表沉降呈现缓慢地衰减趋势。This article takes Baitengqi Road in the western central urban area of Zhuhai as the research object,and conducts vacuum combined preloading tests and numerical simulations on a large area of deep soft soil filling area.The measured data and numerical simulations are combined,and the results show that the impact range of large-area soft soil treatment exceeds the bottom area of conventional building foundations,the impact depth exceeds the depth range of plastic drainage boards,and there is still a small amount of settlement at the bottom,However,80%to 90%of the total settlement is still concentrated at more than 50%of the depth of the plastic drainage board.During the treatment of large-area soft foundation,there is a significant change in horizontal displacement values within the range of 1 time the length of the drainage board at the boundary of the reinforcement zone.The horizontal displacement of the surrounding soil outside the range of 1 time the length of the drainage board shows a slow attenuation trend.The surface settlement within the depth range of 0.8 times the drainage board varies greatly,while the surface settlement of the surrounding soil outside the depth range of 0.8 times the drainage board shows a slow attenuation trend.

关 键 词：大面积 深厚 软土 数值模拟 实测数据 沉降 

分 类 号：P64[天文地球—地质矿产勘探]