某水库影响区路面塌陷原因分析及对策建议

Cause Analysis and Countermeasure Suggestion of Pavement Collapse in the Affected Area of a Reservoir

摘要:

为了探究四川某水库影响区路面塌陷原因。通过现场调查，采用比较分析法和建立渗流模型法，分析了塌陷形成原因和成灾机理，提出了防治建议。研究结果表明：场区大面积分布较厚层粉土，排污水管位于粉土、卵石两种持力层，为地面不均匀沉降和地面塌陷提供了基础条件；深埋的排水暗沟年久失修，局部破损，为渗流及土颗粒流失提供通道；水库水位升降为渗流提供水动力条件，污水抽排进一步加大了渗流水头差；建议采用注浆加固、碎石回填、钢管桩加固等防治措施，并开展地下雨污管道病害综合调查。可为类似路面塌陷防治提供参考。

Abstract:

In order to explore the cause of pavement collapse in the affected area of a reservoir in Sichuan, through the field investigation, the comparative analysis method is used and the seepage model is established to analyze the causes of collapse and the mechanism of disaster formation. And the prevention and control suggestions are proposed. The research results show that the site area is widely distributed with thick layers of silt. The sewage pipes are located in two bearing strata of silt and pebbles, providing the basic conditions for uneven ground settlement and ground collapse. The deeply buried drainage ditches have been in disrepair for a long time and are partially damaged, providing the channels for seepage and soil particle loss. The rise and fall of the reservoir water level provide the hydrodynamic conditions for seepage, and the pumping and discharge of sewage further increase the seepage head difference. It is suggested to adopt the grouting reinforcement, gravel backfill, steel pipe pile reinforcement and other preventive measures, and the comprehensive survey on the diseases of underground rainwater and sewage pipes is carried out, which can provide reference for the prevention and control of similar pavement collapses.