高压旋喷技术在基坑护壁与止水工程中的应用

APPLICATION OF JET GROUTING TECHNIQUE TO SLOPE SHORING AND WATER SEALING UP OF FOUNDATION PIT

长沙天都大厦工程围护墙先后采用2套方案施工,实践证明,采用高压旋喷单管双液分喷法具有设备简单;投资少;操作容易,施工速度快;桩间搭接严密,固结体强度高;适用范围广等优点,尤其在处理软弱地基、基坑支护和止水工程中显示出有效性、可靠性和优越性。该方法再经进一步完善,将具广阔的推广前景。

Two methods were adopted in order of priority for slope shoring of the foundation pit in the construction of Changsha Tiandu building but only the unipipe jet double-direction grouting technique was practice proved to work better. The technique has many advantages, such as simple equipments, few investment, easy operation, construction speediness, close link between piles, highly strong consolidation and a large circle of practice. It is particularly applied to dealing with soft foundation, excavation supporting and water stopping, representing an effective, reliable and good constructing method. It will get a vast range of prospects for popularizing if further perfected.