重塑膨胀土膨胀后侧压力的试验研究  

Experimental Study of the Lateral Swelling Pressures in Remolded Expansive Soils

作　　者：万梁龙 邹维列[2] WAN Lianglong;ZOU Weilie(Bureau of Public Works of Shenzhen Municipality,Shenzhen,518000;School of Civil and Architecture Engineering,Wuhan University,Wuhan 430072)

机构地区：[1]深圳市建筑工务署教育工程管理中心,广东深圳518000 [2]武汉大学土木建筑工程学院,武汉430072

出　　处：《土工基础》2022年第1期96-101,共6页Soil Engineering and Foundation

基　　金：国家自然科学基金项目(51979206)。

摘　　要：膨胀土膨胀后产生的侧压力是设计膨胀土挡墙的重要参数,为探究膨胀土膨胀后侧压力的简便测量方法,以及增湿含水率、压实后残余侧压力、干~湿循环等因素对膨胀土膨胀后侧压力的影响,对K_(0)固结仪进行改进,并以中膨胀性重塑土为试验对象进行研究。试验结果表明,用K_(0)固结仪测量膨胀后侧压力是可行的,增湿含水率对膨胀后侧压力影响较大,干~湿循环、压实引起的残余侧压力不会对膨胀后的侧压力造成明显影响。The lateral swelling pressure in expansive soil is an important parameter for the design of the retaining wall in the area with expansive soils. To explore the simple measurement method of the lateral swelling pressure in expansive soils and the influence of the increased water content, the compaction induced residual lateral pressure and wetting-drying cycles on the lateral swelling pressure, a remolded medium expansive soil was tested by using the modified K_(0) consolidometer. Testing results indicated that measuring the lateral swelling pressure by using the K_(0) consolidometer is reliable;wetting-drying cycles and compaction induced residual lateral pressure do not influence the lateral swelling pressure;and the increased water content apparently affects lateral swelling pressure.

关 键 词：膨胀土 K_(0)固结仪 干湿循环 膨胀后侧压力 

分 类 号：TU411[建筑科学—岩土工程]