采矿与安全工程学报2016，Vol.33Issue(3)：494-500,7.DOI:10.13545/j.cnki.jmse.2016.03.018
厚风积砂覆盖地层立井井壁竖直附加力与井壁结构
Vertical additional force and structure of shaft lining in thick aeolian sand strata
摘要
Abstract
Through physical experiment and numerical calculation, the vertical shear test between sat-urated sand and shaft concrete interface was preliminarily studied, and some interface shear strength parameters were obtained. The variation of vertical additional force on shaft lining in thick aeolian sand strata was further studied through numerical calculation. Research results have shown that 1) The verti-cal additional force presents nonlinear growth rule as the depth in aeolian sand strata increases, and the maximum vertical additional force appears near the interface between aeolian sand and bedrock; and 2) After entering the bedrock, vertical additional force rapidly decreases because of bedrock force-sharing effect. In more than 100 meters depth of aeolian sand, as water level of aeolian sand aquifer declines (such as decline more than 20 meters), traditional double layer shaft lining can be ruptured near the in-terface between aeolian sand and bedrock under the action of vertical additional force. Therefore, the compressible shaft lining structure should be adopted to limit the increase of vertical additional force in thick aeolian sand strata.关键词
风积砂地层/井壁结构/竖直附加力/物理试验/数值计算Key words
aeolian sand strata/shaft structure/vertical additional force/physical test/numerical calculation分类
矿业与冶金引用本文复制引用
张驰,杨志江,张涛,韩涛..厚风积砂覆盖地层立井井壁竖直附加力与井壁结构[J].采矿与安全工程学报,2016,33(3):494-500,7.基金项目
深部岩土力学与地下工程国家重点实验室自主研究课题项目(SKLGDUEZ1202，Z16007)；国家自然科学基金项目(51323004) （SKLGDUEZ1202，Z16007）
