高压旋喷灌浆在某工程砂卵砾石地基防渗加固中的应用效果分析

Application effect analysis of high pressure jet grouting in anti-seepage reinforcement of sand gravel foundation of a project

采用双管法高压旋喷灌浆对砂卵砾石地层进行防渗处理,通过试验选择合适的灌浆方式和施工工艺参数。在施工过程中对这些工艺参数进行严格控制,保证灌浆后的防渗墙体完整、连续和强度高。围井抽水试验及墙体钻孔注水试验结果表明:高压旋喷灌浆防渗墙体抗渗性能指标满足设计要求,取得了预期处理效果。工程实践证明采用双管法高压旋喷灌浆对砂卵砾石地基进行防渗处理技术可行。

The double hight pressure jet grouting was used to treat the anti-seepage of sand gravel foundation,and the appropriate grouting method and constrution process parameters were selected through the test.During the construction process,these process parameters were strictly controlled to ensure the integrity,continuity and high strength of the anti-seepage wall after grouting.The results of well pumping test and water injection test in borehole show that the anti-seepage performance index of high-pressure rotary jet grouting anti-seepage wall meets the design requirements and achieves the expected treatment effect.The engineering practice has proved that the anti-seepage treatment technology of sand gravel foundation by double pipe high pressure rotary jet grouting is feasible.