首页|基于位移等代法的深部直墙半圆拱形隧洞松动圈厚度预测

基于位移等代法的深部直墙半圆拱形隧洞松动圈厚度预测

扫码查看
原文链接
  • 万方数据
  • 维普
[目的]位移等代法是在工程实践中被广泛应用的一种等效圆法。为进一步探索该方法在深部非均匀应力场下预测松动圈厚度的工程效果，并建立具有工程适用性的等效圆半径计算公式，[方法]选取深部隧洞常采用的直墙半圆拱形断面为研究对象，根据位移等代法基本原理，利用FLAC3D数值模拟和理论计算相结合的方式，建立了侧压系数λ为1。1-1。5，跨高比b0/h为1。3～1。5条件下的等效圆半径函数关系式，并应用到江西曲江某煤矿水仓围岩的松动圈厚度预测。[结果]结果显示:根据等效圆公式计算出的水仓围岩松动圈的纵轴厚度为1。41 m，横轴为1。20 m，呈椭圆形;现场实测的松动圈也呈椭圆形，厚度平均值在1。15～1。45 m，其中最大均值在纵轴1。45 m，最小均值在横轴为1。15 m。理论预测值与实测值相吻合。[结论]结果表明:位移等代法适用于深部软岩松动圈厚度预测;所建等效圆半径公式具有良好的工程适用性，可为评价和预测类似隧洞工程松动圈厚度提供一种简化的、可借鉴的方法和思路。
Prediction of broken rock zone thickness of straight wall semicircular arch deep tunnel based on displacement equivalent method
[Objective]Displacement equivalence method is an equivalent circle method that is widely used in engineering prac-tice.In order to further explore the engineering effect of this method in predicting broken rock zone thickness under deep non-uni-form stress field,and to establish the equivalent circle radius calculation formula with engineering applicability.[Methods]The straight-wall semicircular arch section often used in deep tunnels was selected as the research object,and according to the basic principle of displacement equivalence method,the equivocal circle radius functional relationship equation was established under the conditions of lateral pressure coefficient λ of 1.1～1.5 and span-to-height ratio b0/h of 1.3～1.5 by using a combination of numerical simulation of FLAC3D and theoretical calculations,and was applied to predict broken rock zone thickness of the sur-rounding rocks of the water silo of a coal mine in Qujiang,Jiangxi Province.Thickness prediction.[Results]The result show that:according to the equivalent circle formula,broken rock zone of the water chamber peripheral rock has a thickness of 1.41 m in the longitudinal axis and 1.2 m in the transverse axis,which is elliptical;the measured broken rock zone is also elliptical,with an average value of(1.15～1.45)m,of which the maximum value is 1.45 m in the longitudinal axis,and the minimum is 1.15 m in the transverse axis.the theoretical prediction is in line with the measured value.[Conclusion]The result show that:the displacement method is suitable for the prediction of broken rock zone thickness of the deep soft rock;the constructed equiva-lent circle radius formula has good engineering applicability,and it can provide a simplified and reference method and idea for the evaluation and prediction of the thickness of broken rock zone of the similar tunnel project.

arch deep tunnelstraight-wall semicircular archdisplacement equivalence methodequivalent circlesurrounding rockdeformationbroken rock zonenumerical simulation

邵炜星、查文华、许涛、王荣荣、程文博

展开 >

东华理工大学土木与建筑工程学院,江西南昌 310033

丰城曲江煤炭开发有限责任公司,江西丰城 331136

隧洞 直墙半圆拱形 位移等代法 等效圆 围岩 变形 松动圈 数值模拟

国家自然科学基金国家自然科学基金江西省"双千计划"支持项目华东理工大学科研启动基金

5196400252264003DHSQT220210021410000435

2024

10.13928/j.cnki.wrahe.2024.03.012

水利水电技术(中英文)
水利部发展研究中心

水利水电技术(中英文)

CSTPCD北大核心
影响因子：0.456
ISSN：1000-0860
年,卷(期)：2024.55(3)
  • 20