砂卵石地层泥水盾构泥浆渗透试验分析  

Mud Seepage Tests for Slurry Shields Driving in Sandy Cobble Ground

作　　者：袁大军[1] 李兴高[1] 李建华[2] 叶旭洪[1] 孙立 

机构地区：[1]北京交通大学隧道及地下工程教育部工程研究中心,北京100044 [2]中铁隧道集团有限公司洛阳科学技术研究所,河南洛阳471009 [3]深圳市地铁有限公司,广东深圳518026

出　　处：《都市快轨交通》2009年第3期32-35,共4页Urban Rapid Rail Transit

基　　金：国家自然科学基金(50878015);铁道部科技研究开发计划重点课题(2007G035)

摘　　要：采用自制试验仪器,通过渗透试验研究泥浆对地层的适应性。试验表明,泥浆相对密度越大,泥膜质量越好,在相对密度达到1.08时,增大泥浆的黏度并不能有效减少泥浆的渗流量。泥膜的抗渗性与泥膜形成时的压差以及渗透时间密切相关,渗透成膜的压差越大,泥膜破坏需要的渗透压力也越大,而渗透时间长短决定泥膜凝胶强度的大小以及致密性。Seepage tests were carried out by using home-made devices to study the adaptability of slurry to the ground of interest. Results showed that the larger the slurry specific gravity, the better the mud membrane quality, and that when the slurry specific gravity reached 1.08, the mud seepage discharge could not be efficiently reduced by increasing the mud viscosity. The impermeability of the mud membrane was closely related with the differential pressures at the time of mud membrane forming and the seepage time, and the larger the differential of pressures, the larger the required seepage pressures to destroy the mud membrane. Seepage time governed the gel strength and the compactability of the mud membrane.

关 键 词：砂卵石 泥水盾构 泥浆 渗透试验 

分 类 号：TU411.4[建筑科学—岩土工程] TU753.3[建筑科学—土工工程]