摘要
厦门地区的花岗岩地层中发育了大量的球状风化体(俗称孤石),对地铁工程的建设产生了不利的影响。通过对厦门地铁一号线、二号线进行钻探及室内试验研究,根据揭示的孤石进行统计分析,并分析对地铁工程的影响。研究表明:厦门地区花岗岩孤石埋深主要集中在0.7~20m之间;89%的孤石厚度不超过4m;近半数孤石分布于强风化层;其饱和抗压强度主要集中在40~45MPa和90~100MPa,天然抗压强度集中在45~50MPa和100~110MPa;地铁施工时孤石可能会导致盾构机损坏和姿态失控。
A large number of spherical weathered bodies(commonly known as the “boulder”)have been developed in the granite stratum in the Xiamen area,which have adversely affected the construction of subway engineering. Based on a misering and laboratory test of Xiamen Metro Line 1 and Line 2,this paper makes a statistic of the exposed boulder,and an analysis of its influence on the subway engineering. The results show that the burial depth of granite boulders in the Xiamen area is mainly 0~20 m;the thickness of 89% boulders is no more than 4m;nearly half of the boulders are distributed in the strong differentiation layer;the saturated compressive strength is mainly concentrated at 40~45MPa and 90~100MPa,and natural compressive strength is concentrated at 45~50MPa and 100~110MPa;boulders may lead to the damages of shield machine and the out of control of their posture.
作者
施有志
赵花丽
黄钰琳
林树枝
SHI Youzhi;ZHAO Huali;HUANG Yulin;LIN Shuzhi(School of Civil Engineering and Architecture,Xiamen University of Technology,Xiamen,Fujian 361021;Shanghai Jiao Tong University,School of Naval Architecture,Ocean & Civil Engineering,Shanghai 200240;Xiamen Construction Bureau,Xiamen,Fujian 361003)
出处
《地质与勘探》
CAS
CSCD
北大核心
2019年第3期862-869,共8页
Geology and Exploration
基金
厦门市科技计划项目(编号:3502Z20183043)资助
关键词
厦门地铁
花岗岩球状风化体
孤石
分布规律
统计分析
盾构施工
Xiamen metro
spherical weathered body of granite
boulder
distribution discipline
statistical analysis
shield construction
作者简介
第一作者:施有志(1976年-),男,教授,主要从事岩土与地下工程方面的研究。E-mail:2013110907@xmut.edu.cn。
