软土地基加固中竹网的受力与变形分析  

Stress and deformation analysis of bamboo net in soft soil foundation reinforcement

作　　者：王桂香[1] 严盛康 乐绍林 王浩晨 于增辉 WANG Guixiang;YAN Shengkang;LE Shaolin;WANG Haochen;YU Zenghui(College of Civil Engineering and Architecture,Hebei University,Baoding 071002,China;CCCC Road&Bridge Special Engineering Co.,Wuhan 430071,China)

机构地区：[1]河北大学建筑工程学院,河北保定071002 [2]武汉二航路桥特种工程有限责任公司,湖北武汉430072

出　　处：《河北大学学报（自然科学版）》2022年第4期358-363,共6页Journal of Hebei University(Natural Science Edition)

基　　金：河北省自然科学基金资助项目(2019201422)。

摘　　要：为研究竹网在软土地基表层处理中的作用、受力和变形规律,通过实验确定实验材料参数并设计使用液压千斤顶加载的竹网加固软基的室内模型荷载实验,研究载荷作用下竹网的变形和受力特性.实验结果表明:毛竹单杆简支梁在集中荷载作用下的破坏形式为纵向开裂或弯折,弯曲比例极限为6.6~107.2 MPa,极限强度为71.9~117.8 MPa,弹性模量11.59~19.57 GPa;间距为15 cm×15 cm的对边简支竹网的承载能力是单根竹竿的3.7~5.9倍;随着上覆土层厚度的增加,地基压力明显增加,当厚宽比在0~0.69时,对应沉降40 mm的地基压力与软土地基的压力比为2.66~6.96;竹网上应变和应力由于砂土层的扩散作用而降低.In order to study the effect,stress and deformation of bamboo net in surface treatment of soft soil foundation,the experimental material parameters were determined through experiments,and the indoor model load test of bamboo net reinforced soft foundation with hydraulic jack was designed to study the deformation and stress characteristics of bamboo net under load.The test results show that the failure mode of bamboo single pole simply supported beam under concentrated load is longitudinal cracking or bending,the bending ratio limit is 6.6—107.2 MPa,the ultimate strength is 71.9—117.8 MPa,and the elastic modulus is 11.59—19.57 GPa.The bearing capacity of bamboo net with a spacing of 15 cm×15 cm is 3.7—5.9 times that of a single bamboo rod.With the increase of the thickness of the overlying soil layer,the foundation pressure increases obviously,and when the thickness width ratio is 0—0.69,the foundation pressure over that of soft soil foudation with a corresponding settlement of 40 mm is 2.66—6.96.The strain and stress of bamboo net decrease due to the diffusion of sandy soil layer.

关 键 词：土工布 竹网 承载特性 模型实验 

分 类 号：TU472[建筑科学—结构工程]