110 kV高压线下沉井下沉遇地质突变施工技术研究

Research on Construction Technology of Open Caisson under 110 kV High Voltage Line in Case of Geological Mutation

某市110 kV高压线下沉井遇地质突变项目工程为例,该工程在下沉过程中遇到了复杂地质条件。通过分析地质资料和现场勘察结果,发现地层岩性发生变化,由原来的砂土变为泥质粉砂岩。针对这一情况,及时调整施工方案,采用高压线防护装置、不排水下沉+排水逆作法、优化现场施工设备等措施,有效解决了高压线下遇到复杂地质条件对工程的影响。同时,针对地下水活动情况,增加止水帷幕和排水沟等措施,保证了工程的顺利进行。

A 110 kV high-voltage line project encountered complex geological conditions during the sinking process.By analyzing geological data and on-site survey results,it was found that the lithology of the formation has changed from sandy soil to muddy siltstone.In response to this situation,measures such as timely adjustment of the construction plan,adoption of high-voltage line protection devices,non drainage sinking+drainage reverse method,and optimization of on-site construction equipment have effectively solved the impact of complex geological conditions encountered under the high-voltage line on the project.At the same time,measures such as adding waterproof curtains and drainage ditches have been taken to ensure the smooth progress of the project in response to groundwater activities.