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河南省林县李家寨5孔10公尺的石拱桥,拱矢度1/3,全长72.5公尺,高9.77公尺,采用砾石圈胎砌筑拱圈石,造价低廉,施工简易。兹介绍如下:砌筑方法砾石圈胎是修建在河底上,四周靠礅台及端垟围起挡住。当礅台砌至1.5公尺高度时,随用水泥沙浆勾缝,并在桥墩的分水尖处修建端垟。砌端墙前,先将河底清理平坦随着端墙的砌筑上升,即将砾石运入。待端墙逐步砌高,进料不易时,可搭跳板,向内进料。这时墩台、端墙和砾石圈胎料要同时砌筑和填充,所填砾石应分层夯实。在端墙上找出跨径中线,并于中线上找出拱圈半径的圆心,
Lijiazhai, Lin County, Henan Province, 5 holes 10 meters stone arch bridge, arch 1/3, length of 72.5 meters, 9.77 meters high, the use of gravel ring stone masonry stone, low cost, easy construction. Here is a description of the following: Masonry Method The gravel quilt is built on the bottom of a river and surrounded by trestles and ends to block it. When the podium is constructed to a height of 1.5 meters, it is to be grouted with cement mortar and the ridges are to be constructed at the pier tips of the piers. Before constructing the end wall, clean the bottom of the river first. As the wall of the end wall rises, the gravel will be sent in soon. To be gradually build high end wall, feeding is not easy, you can take the springboard, inward feed. At this time piers, end walls and gravel ring material to be masonry and filling at the same time, the gravel filled should be stratified compaction. Find the span centerline on the endwall and find the center of the arch radius on the centerline,