道路工程真空预压环境效应现场试验研究  

Site Test Study on Vacuum Prepressing Environmental Effect of Highway Engineering

作　　者：姜扬剑 戴云峰[2] 程兴[2] 

机构地区：[1]浙江金丽温高速公路有限公司,杭州310005 [2]江苏省交通科学研究院股份有限公司,南京210017

出　　处：《路基工程》2010年第2期91-93,共3页Subgrade Engineering

摘　　要：结合南京浦口区西江路工程真空预压处理软基实例,针对其在道路两侧真空预压影响区产生的沉降和侧向位移等环境效应问题,通过现场试验研究影响区土体的沉降和侧向位移变形规律。结果表明:南京长江河漫滩地区道路工程使用真空预压法处理软基时,若周围不采取防护措施,最大影响范围约为28 m;最大沉降发生在加固边界处,随着与加固边界距离的增加沉降衰减较快;侧向位移随着真空预压加固边界距离的增大和土层埋深的增加,呈现逐渐减小的趋势;抽真空前期以上部土体变形为主,后期以深部土体变形为主。Combined with the practice of soft foundation treatment with vacuum precompression in Xijiang Road engineering of Pukou District of Nanjing, for the environmental effect problems of settlement and lateral displacement in vacuum prepressing areas on both sides of road, this paper studies the rule of settlement and lateral displacement changes of soil mass through site test. The result indicates that when soft foundation is dealt with vacuum method for highway engineering in flood land of Yangtze River in Nanjing, the maximum influence range is about 28m in case of no protecting measures ; the maximum settlement occurs at the boundary of reinforcement and attenuates with the increase of distance from reinforcement boundary; lateral displacement tends to reduce with the increase of distance and depth of soil layer from vacuum reinforcement boundary. At the early stage of vacuum prepressing, deformation mainly occurs at upper soil mass ; at later stage, deformation mainly occurs at lower part.

关 键 词：道路工程 真空预压 环境效应 沉降 侧向位移 

分 类 号：U419.8[交通运输工程—道路与铁道工程]