用于混凝土管道结构性修复设计的围土荷载模型  

Load Model of Surrounding Soil for Structural Repair Design of Concrete Pipeline

作　　者：何春良 曾正 马保松[1] 赵雅宏 张海丰 He Chunliang;Zeng Zheng;Ma Baosong;Zhao Yahong;Zhang Haifeng(Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, China)

机构地区：[1]中国地质大学(武汉)工程学院

出　　处：《地质科技情报》2019年第5期269-274,共6页Geological Science and Technology Information

基　　金：国家重点研发计划“公共安全风险防控与应急技术装备”(2017YFC0805000)

摘　　要：混凝土管道在我国排水管网中广泛应用,受管道自身质量、施工质量和外荷载过大等因素的影响常产生结构性破坏,其中较典型的结构破坏形式之一便是产生纵向裂缝。对混凝土管道进行结构性修复设计时,需要确定管道破坏时的土荷载,综合考虑管道和土体的相互作用,目前国内外尚无这方面的研究。分析了管道新建、使用、破坏3个阶段的土荷载变化规律,建立混凝土管道破坏后土荷载模型。建立的模型中管顶土荷载按土柱荷载计算,管底土荷载按均布荷载计算,管侧荷载等于静止侧向土荷载与三角形分布荷载之和,并根据新建立的模型计算管壁环向内力系数,为混凝土管道非开挖结构性修复设计提供参考。Concrete pipelines are widely used in drainage networks in China. Structural damage often occurs due to the quality of pipelines, construction quality and excessive external load. One of the typical forms of structural damage is longitudinal cracks. In the structural repairing design of concrete pipeline, it is necessary to determine the soil load when the pipeline is damaged and to consider the interaction between the pipeline and the soil. This paper analyses the law of soil load variation in three stages of pipeline construction, operation and failure and establishes the soil load model after the concrete pipeline failure. In the model, the soil load on the top of the pipe is calculated according to the soil column load, and the soil load on the bottom of the pipe is calculated according to the uniform load. The lateral load of the pipe is equal to the sum of the static lateral soil load and the triangular distributed load. The circumferential internal force coefficient of the pipe wall is calculated according to the newly established model, which provides a reference for the design of trenchless structural repair of concrete pipelines.

关 键 词：混凝土管道 非开挖修复 土荷载模型 内力计算 

分 类 号：U178[交通运输工程]