清河水库溢洪道进口导流墙施工破坏原因分析

Destruction cause analysis of guide wall of spillway inlet of Qinghe reservoir

在清河水库除险加固工程溢洪道进水渠导流墙爆破施工中,对需要保留的导流墙产生了破坏,依据边墩爆破拆除时,爆破拆除监测结果,分析导致破坏的原因,是边墩拆除爆破造成的;施工缝和变截面处是结构抗力的薄弱部位;设计要求挡墙部位允许质点震动速度值7cm/s应当严格限制。建议采取静态爆破方法拆除建筑物。

The guide wall needing to preserve was destroyed in blasting construction of guide wall of spillway inlet tunnel in danger control and reinforcement engineering of Qinghe reservoir. Based on the monitoring results of blasting demolition of the abutment pier, the paper analyzes the destruction cause that the guide wall is the blasting demolition of the abutment pier, the construction joint and the variable cross-section are the weak parts of the structure reactance, the permissible particle vibration velocity of retaining wall is 7 cm/s with the strictly limited. The static blasting method is recommended to demolish the buildings.