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桥梁浅基整治方法甚多,本文仅介绍抬高河床,防止冲刷桥梁墩台基础的一种有效方法。一、工程概况襄渝铁路K446+726米后河1号中桥,地处大巴山南麓,地质系石灰岩地层。该桥1970年6月27日开工,1972年12月竣工。桥梁位置处于后河发源地,山高谷深,洪水期间急流直下。襄樊端桥台基础置于砂夹孵石层上,人工开挖扩大基础。基底承载力为350～500kPa。该桥原设计为5孔16米的钢筋混凝土梁。后因巴山隧道出碴影响桥梁基础开挖,经设计院同意改为2孔16.0米钢筋砼梁,2孔23.8米预应力钢筋砼梁,襄樊端1#、2#墩设计为不受冲刷。1986年地方政
There are many ways to improve the shallow foundation of the bridge. This paper only introduces an effective method to raise the riverbed and prevent the scouring of the pier foundation. First, the project profile Xiang-Yu Railway K446 + 726 meters Houhe No. 1 Bridge, located in Daba Mountain south, Department of Geology limestone formation. The bridge started on June 27, 1970, completed in December 1972. The bridge is located at the cradle of the Houhe River, with deep valleys and deep rains and rapid rains during the flood. Xiangfan Bridge abutment platform placed sand folder hatch layer, artificial excavation to expand the foundation. Bearing capacity of 350 ~ 500kPa. The original design of the bridge is 5 holes 16 meters of reinforced concrete beam. Later, due to the failure of Bashan Tunnel, the foundation excavation of the bridge was affected. After the design institute agreed to change to 2 holes of 16.0m reinforced concrete beam, 2 holes of 23.8m prestressed reinforced concrete beam and Xiangfan Ports 1 # and 2 # pier were designed to be protected from erosion. 1986 local government