单层井壁竖直附加力变化规律的数值分析  

Numerical Analysis on Variation Law About Vertical Additional Force of Monolayer Shaft Lining

作　　者：侯俊友[1] 聂飞[2] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]淮北矿业集团岱河煤矿,安徽淮北235000

出　　处：《中州煤炭》2012年第6期31-34,共4页Zhongzhou Coal

基　　金：河南省杰出青年计划(084100510004)

摘　　要：深厚表土疏排水沉降地层条件下的井壁处于复杂的动态受力状态,井壁的受力变化主要与底部含水层的渗透系数、含水层固结沉降量、井壁与围土的耦合作用有关。为探讨井壁竖直附加力大小的变化规律,运用数值模拟方法对单层混凝土井壁进行了分析研究,得出:井壁的竖直附加力与底部含水层渗透系数成正比对数关系,与井壁混凝土的弹性模量成正比线性关系;同时发现复合载荷作用下井壁的应力应变关系是动态变化的,井壁的塑性区是多种载荷耦合作用的结果。因此,减小底部含水层的渗透系数、井壁混凝土的弹性模量,有利于减小井壁的竖直附加力,可提高井壁的可靠性。The shaft lining under the deep alluvium drainage and grouting settlement stratum are in the complex dynamic force state,the stresses of shaft lining have relate to transmission coefficient of bottom aquifer, consolidation settlement of aquifer, coupling effect between shaft lining and surrounding soil. To study the variation laws of vertical additional force of shaft lining, this paper analyzed reinforced concrete monolayer shaft lining on numerical simulation method, and the conclusion was drawn that vertical additional force of monolayer shaft lining is proportional logarithm to permeability coefficient of bottom aquifer and it is proportional to modulus of elasticity of shaft lining concrete. Meanwhile,It is found that shaft lining＇s stress-strain relationship is dynamic under mixed model loading, and the plastic zone of shaft lining is resulted from multiple load coupling. Therefore, decreasing permeability coefficient of bottom aquifer and modulus of elasticity of shaft lining concrete is beneficial to reduce vertical additional force of monolayer shaft lining and increase the stability of shaft lining.

关 键 词：竖直附加力 渗透系数 弹性模量 耦合作用 

分 类 号：TD352[矿业工程—矿井建设]