粉喷桩工程中的若干问题

Some Problems of Powder-spray Pile in Engineering.

本文简介了粉喷桩现状,对计算参数,承载力,适用性进行了讨论,指出设计工作利用现场测试特别是静力触探的重要性,推荐用比贯阻力等现场测试参数计算不排水强度和侧壁摩阻等的公式,提出粉喷桩单桩极限承载力提高的可能性,对两次搅拌甚至多次搅拌,堵灰和掌握用灰量等问题进行了讨论,并根据实验资料论述了水泥土的强度和变形特性。

In this paper, the current situation of powder-spray pile was briefly introduced. The caculating parameters, bearing capacity and suitability were discussed. The importance of utilizing field measurements, especially static penetration test to obtain were pointed out. Formulas for caculating undrained shear strength and side wall friction et. were recommended by using specific penetration resistance and other parameters of field measurements. The posibility of increasing powder-spray pile capacity was put forward. For two even more stirrings, the problems of cement jam and cement amount used were discussed. The strength and deformation characteristics of cement-soil piles were discussed on the basis of experimental data.