一、概述土坝坝下埋设钢筋混凝土涵管是一般中小型水利工程中较常采用的一种型式。它具有施工简单、造价低廉等特点。但突出的问题是容易发生横向裂缝,这种裂缝对土坝的安全威胁较大,因此如何设计坝下埋管以避免发生横向断裂,是一个急待解决的问题。在五十年代后期兴建的一些水库中,取水建筑物多采用坝下埋设钢筋混凝土涵管的形式。(如图1)其中发生横向裂缝的涵管相当普遍,有的涵管因横向裂缝而废弃,有的须经 First, an overview Embankment embankment embedded in reinforced concrete culvert is generally more commonly used in small and medium-sized water conservancy project a type. It has the construction of simple, low cost and so on. However, the outstanding problem is that horizontal cracks are easy to occur. Such cracks threaten the safety of earth dam. Therefore, how to design buried pipe in dam to avoid horizontal fracture is an urgent problem to be solved. In some reservoirs built in the late 1950s, water intake structures often use the form of reinforced concrete culverts embedded in the dam. (Figure 1) One of the culverts in which horizontal cracks occur is quite common. Some culverts are abandoned due to horizontal cracks and some are required