浅谈旋喷桩在某地铁车站盾构洞口土体加固的技术参数比选

Comparison and selection of technical parameters for shield tunnel mouth soil reinforcement of a subway station with jet grouting pile

高压旋喷桩作为一种非常有效的土体加固手段,已被广泛应用到了盾构法隧道端头井洞口土体的加固中去。本文将以大连地铁某工程为实例,对高压旋喷桩施工过程中的技术参数的选取进行论述。提出根据现场场地实际情况,先初设参数进行试桩,后依据试桩钻芯取样所测结果对技术参数作进一步调整,最终得出最为合适的技术参数。

The high pressure rotary jet grouting pile,as a very effective means for soil reinforcement,has been widely applied in soil reinforcement of shield tunnel mouth.Taking a subway project of Dalian for example,the selection of technical parameters for construction process of high pressure rotary jet grouting pile was described.It was put forward that under actual site conditions,first set parameters and test piles,then adjust the technical parameters according to the core drilling and sampling result,and finally the most suitable technical parameters were derived.