临近基坑地下供水管网变形破坏预警模型

A warning model for underground pipeline damage caused by adjacent excavation

为及时对地下供水管线在临近基坑开挖导致地层变形影响下的变形破坏进行告警,弥补现有市政管线信息管理平台在面向临近施工扰动监测智能预警服务模块方面的不足,基于基坑周边位移场计算理论和地下管线破坏判定准则,建立基于基坑监测数据的地下供水管线变形破损预警模型及数字化流程,基于同济大学自主研发的基础设施智慧服务系统(iS3)开发相应的微服务模块,依托工程实例,实现临近基坑地下供水管线的变形实时估算与破坏预警,并为极端情况中地下供水管线安全分析提供风险场景的推演工具。

In order to timely alarm the deformation and damage of underground water supply pipelines under the influence of the stratum deformation caused by the excavation of the adjacent foundation pit,and make up for the deficiencies of the existing municipal pipeline information management platforms in the intelligent early warning service module for the monitoring of adjacent construction disturbances,the theory of the displacement field calculation around the foundation pit and the underground pipeline failure criterion was introduced,based on which,a warning model and the corresponding digital procedure for the damage of deformed underground water supply pipelines utilizing the monitoring data of the foundation pit was established.The corresponding microservice module was developed based on the infrastructure Smart Service System(iS3)independently developed by Tongji University.The real-time deformation estimation and damage warning of underground water supply pipelines near the foundation pit were achieved in an engineering project,which provided a tool for the risk scenario deduction for the safety analysis on underground water supply pipelines in extreme cases.