高压旋喷桩止水帷幕在砂层地质中的应用

为了使城市主干管在砂层地质顺利施工,结合顶管井的止水帷幕设计,介绍了在砂层地质中的高压旋喷桩止水设计,参照基坑抗渗稳定验算,进行了抗渗设计。根据工程实际情况,对高压旋喷桩和水泥土搅拌桩在工程中的应用作了比较、分析,对场地工作面较窄的条件下实施帷幕止水方案提出了建议,并根据实际工程经验,对砂层地质止水帷幕具体实施给出了建议。按照文章提供的方法,采用旋喷桩止水帷幕,工程取得了良好的止水效果并加快了施工进度。

The Application of High Pressure Jet Grouting Pile Water-resisting Curtain in Drift Sand Geological Layer

In order to make the city main pipe construction successfully in sand layer,combined with pipe jacking well water-resisting curtain design,the water-resisting design of the high pressure jet grouting pile in the drift sand geological layer was introduced,permeability design was carried out reference to antipermeability stability calculation of foundation pit.According to actual engineering situation,application of high pressure jet grouting pile and cement deep mixing pile in engineering was compared and analyzed,some advices were proposed to water-resisting curtain solutions under the condition of narrow working face,and according to the practical engineering experience,the sand layer geological water-resisting curtain specific implementation suggestions were given.According to the method in the article with pipe jacking well waterresisting curtain,the project achieved a good sealing effect and the construction schedule was accelerated.