渗流应力温度耦合下裂隙围岩隧道涌水量的预测

基于系统理论研究及工程实践的分析应用，提出了渗流应力温度耦合环境下大埋深裂隙围岩隧道涌水量预测计算的确定性数学模型方法（ 水文地质数值模拟法） ，并通过一隧道工程实例进行了计算验证     

声波透射法在旋喷桩复合地基加固效果评价中的应用

结合襄渝线某段地基加固效果检测实例,介绍声波透射法在旋喷桩复合地基加固效果评价中的应用。提出天然地基加固后旋喷桩体和复合地基波速的最低限值:对旋喷桩体,波速最低限值为1600m·s-1;对复合地基,波速最低限值为1100m·s-1。若加固后旋喷桩体和复合地基的波速均达到上述最低限值,则旋喷桩体的无侧限抗压强度一般可达2MPa～8MPa,复合地基承载力可达250kPa～400kPa。实践表明,声波透射法操作简便、快捷,对现场测试条件要求不高,便于重复测试,而且对测试对象无破坏作用。利用声波透射法的测试结果可以定性评价旋喷桩体和复合地基的均匀性以及相对强度特征。     

铁路岩溶塌陷灾害发育规律及危险性分区研究

本文主要研究了铁路岩溶塌陷灾害发育的物质基础和基本规律,给出了根据线路地表地质地貌以及其它情况判定岩溶塌陷危险性的单因子迭加判定方法,该方法在南昆铁路判定结果和现场钻控结果基本相符具有一定实用价值。     

Screening of Bioflocculant-Producing Strains and Characteristics of Microbial Flocculation

A high effective bioflocculant-producing strain named LB1 was isolated and screened from the leachate by routine micro-method. The strain was identified as genus Pseudomonas according to the morphologic and physiological-biochemical characteristics of the strain. The biological characteristics of the microbial flocculants produced by LB1 were investigated. The results show that the optimal production period of microbial flocculant using LB1 is 96 h; and the products, found in the fermentation liquor, comprise the extracellular organic matter (EOM) of LB1 generated during LB1 growth and the secondary metabolites in the anaphase of LB1. Meanwhile, the mycelia can improve the performance of the microbial flocculants. Because heat has a greater influence on the active substance in the microbial flocculants than other factors, the activity of the flocculants decreases with increasing temperature and the time of heating. The flocculants can flocculate mud-containing and melanin-containing wastewater effectively with a flocculation ratio of 85.1% and 92. 2% , respectively. The optimal heating temperature varies from 20 to 45 ℃. When flocculating the two wastewater, the flocculating activity of the flocculants is above 57. 7% and 70.9% , respectively, in a wide pH range from 3 to 11.     

成渝线典型路基边坡对降雨过程的响应模拟

成渝铁路典型路基边坡由砂泥岩互层及其风化带组成,顶部为２～５ｍ的砂粘土层。模拟实验表明,边坡对降雨过程的水这及力学响应取决于土层的初始渗透性、降雨方式和降雨量;能够对边坡渗流场和应力场产生明显影响的降雨过程一般应同时满足３个条件：（１）雨前经历过较长时间的炎热天气,土层蒸发强烈、初始渗透性良好;（２）降水过程以中到大雨开始,且持续较长时间;（３）降雨时间长,降水量大。     

路基边坡岩体腐蚀的评价研究

岩体腐蚀是路边基坡变形破坏的前提与基础，本文利用质量传输模拟的方法对某路基边坡的岩体腐蚀过程进行了定量评价，结果表明，地下水对边坡的年腐蚀总量近４０ｔ，年腐蚀深度为２．７ｍｍ。     

南昆线西街口—罗平段病害及防治建议

在实地调查基础上，对南昆线西街口－罗平段病害进行了总结并简要分析了病害原因，提出了初步防治建议。     

城市垃圾卫生填埋场防渗层的安全设计

在综合考虑的防渗层防渗性能，截污能力以及场址区环境容量3要素的基础上，以某填埋场为研究背景，通过土柱实验确定填场主要污染物之一Cl^-在防渗层中运移的相关参数并根据填埋场水文地质条件确定场址区地下水体的环境容量，研究表明防渗层上渗滤液水头对填埋场中污染物进入地下水环境的总量影响很大，最后对填埋场防渗层进行了设计。