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我工程段在皖南山区修建了53座涵洞,现就施工后(路基已成形)开裂情况所做的调查,作一些分析与说明。本段铁路全长14公里,原设计拱涵、圆涵共66座,因合并、取消,实际竣工者53座。其设计和施工系根据专桥5000图与壹桥5144图办理,基础均为整体式。涵洞施工后开裂情况的调查见表1～3。这些涵洞竣工已有1～4年,路基竣工亦已1～3年。53座拱涵、圆涵中,有裂纹的计28座,其开裂原因初步分析如下:1.上游沟床有地下水潜流,或基础侧壁
In the project section, 53 culverts were constructed in the mountainous area of southern Anhui. Now, some investigations and investigations on cracking after construction (subgrade has been formed) are made for some analysis and explanation. This section of the railway a total length of 14 km, the original design culvert, round culverts a total of 66, due to the merger, cancel, the actual completion of 53 seats. The design and construction of the Department according to the bridge chart 5000 and Bridge 5144 map, based on the overall style. After the construction of culvert cracks survey in Table 1 ~ 3. These culverts have been completed for 1 to 4 years, the completion of subgrade has also been 1 to 3 years. There are 28 cracks in the arch culverts and round culverts, and the cracking causes are as follows: 1. There is groundwater underflow in the upstream ditch bed, or the base wall