2．查明基坑周边的各类地下设施，包括上、下水、电缆、煤气、污水、雨水、热力等管线或管道的分布和性状；
3．查明场地周边和邻近地区地表水汇流、排泻情况，地下水管渗漏情况以及对基坑开挖的影响程度；
4．查明基坑四周道路的距离及车辆载重情况。
China Railway No.5 Engineering Group Achieves Milestone of 100 Piles in Zhao Jialing Grand Bridge Pile Foundation Construction on Xi'an-Chengdu Passenger Dedicated Line
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