地下综合管廊施工对临近堤防渗流稳定性的影响  

Influences of Underground Comprehensive Pipe Gallery Construction on Seepage Stability of Adjacent Dikes

作　　者：张明书 陈海勇 沈磊磊 王丹生[2] ZHANG Ming-shu;CHEN Hai-yong;SHEN Lei-lei;WANG Dan-sheng(China Railway Development Investment Group Co Ltd,Kunming 650118,China;School of Civil Engineering and Mechanics,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]中铁开发投资集团有限公司,云南昆明650118 [2]华中科技大学土木工程与力学学院,湖北武汉430074

出　　处：《土木工程与管理学报》2019年第3期107-110,118,共5页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(51278215)

摘　　要：本文以临近武汉长江堤防的武九综合管廊施工段为研究背景,采用AUTOBANK7.0分析软件作为分析工具,对武九管廊基坑开挖以及工程竣工后的堤防断面渗流场进行了模拟计算,分析评价了关键堤防断面在相应工况下的渗透稳定性。研究结果表明:在管廊基坑开挖完成,且外江遭遇施工期水位的最不利计算工况时,最大水力坡降发生在基坑前边缘,且仅为6.34,小于该处允许的水力坡降(>50);当工程竣工后,且外江水位达到设计洪水位时,最大水力坡降为0.09,发生在堤防内脚,小于对应土层的水力坡降限值0.20。此外,各断面在施工过程中及竣工后最大渗流流速仅为1.08×10^-7m/s,不会对渗流稳定产生影响。In this paper,the construction section of Wujiu integrated pipe corridor near Wuhan Yangtze River embankment is taken as the research background.The analysis software of AUTOBANK7.0 is used as the analysis tool to simulate the excavation of the foundation pit of Wujiu pipe and the seepage field of the embankment after the completion of the project,analyze and evaluate the permeability stability of the key embankment sections under the corresponding working conditions.The results show that when the excavation of the foundation pit of the pipe gallery is completed and the outer river encounters the most unfavorable calculation condition of the water level during the construction period,the maximum hydraulic slope occurs at the front edge of the foundation pit and is only 6.34,which is less than the allowable hydraulic power slope (>50);when the project is completed and the water level of the outer river reaches the design flood level,the maximum hydraulic slope occuring at the inner leg of the embankment is 0.09,which is less than the hydraulic gradient limit of 0.20 for the corresponding soil layer.In addition,the maximum seepage flow rate of each section during construction and after completion is only 1.08×10^-7 m/s,which will not affect the stability of seepage.

关 键 词：长江堤防 综合管廊 渗流稳定性 水力坡降 

分 类 号：U990.3[交通运输工程]