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Position: Home > Articles > Vacuum Preloading Advanced Study on Chemical-Mechanical Effects of Clay Journal of Anhui Agricultural Sciences 2015 (19) 371-373+385

黏土真空预压固结的化学力学效应

作  者:
夏涵;唐玮;陈浩昆;罗珍贵
单  位:
中山大学地球科学与地质工程学院
关键词:
黏土;结合水;化学力学;固结;真空预压
摘  要:
真空预压是高含水率黏性土地基处理中一种非常有效的方法,在农田水利工程和围海造陆工程中经常使用。在真空预压处理过程中,化学环境一直处于变化的状态,化学环境的变化会引起黏土矿物表面吸附的结合水膜厚度和含量的变化,而黏土的力学行为又与结合水的厚度和含量有着密切的联系,因此化学环境的改变会对黏土的力学性质造成很大的影响。黏土因为渗透性很差,自重沉淤的速度慢,因此黏土的渗透性和强度等性质始终是制约施工速度的一个关键问题。从黏土的离子交换、胶结与沉淀溶解3种化学行为出发,分析了化学行为对黏土表面结合水含量的影响,而结合水的含量改变又会引起黏土渗透性、变形和强度3种力学行为变化,通过结合水将黏土的化学行为同力学行为联系起来,并且展望了未来黏土研究的发展方向。
译  名:
Vacuum Preloading Advanced Study on Chemical-Mechanical Effects of Clay
作  者:
XIA Han;TANG Wei;CHEN Hao-kun;School of Earth Sciences and Geological Engineering,Sun Yat-sen University;
关键词:
Soft clay;;Bound water;;Chemico-mechanic;;Consolidation;;Vacuum preloading
摘  要:
Vacuum preloading is a kind of effective foundation treatment method,compare to other methods the most advantage is less pollution,widely used in reclamation and agricultural hydraulic engineering. In the progress of vacuum preloading treatment,chemical environment has changed frequently,the changed chemical environment will cause clay bound water film thickness and content,and the mechanical behavior of clay is closely related with bound water film thickness and content,so the chemical environment will affect clay mechanical behavior.Clay foundation construction speed is very slow because clay has low permeability and strength characters. This article from ion exchange,cementation and dissolution to analyze clay chemistry effect mechanics such as permeability and strength and prospects the future development direction for the study of clay.

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