深基坑护坡桩技术的几项新发展  

Several new technological develop ments of slope protection pile for the construction of deep foundation pit

作　　者：余志成[1] 施文华[1] 

机构地区：[1]北京建工集团总公司

出　　处：《建筑技术》1994年第5期272-279,共8页Architecture Technology

摘　　要：本文对深基坑挡土护坡桩采用桩土间裂缝开裂深度的新计算方法；通过模型试验和工程实测对双排护坡桩进行机理分析，并作出计算假定和工程实例；阐述插筋补强护坡技术测试及机理，提出施工方法和工程实例；提出了用等值内摩擦角作参数，计算挡土桩插入深度及最大弯矩的方法；对挡土桩圆截面接等效方截面计算配筋并按弯矩图配筋方法；最后，对桩顶圈梁应用进行了总结，提出圈梁应用的新措施。In this article, several new technological developments of slope protection pile for the construction of deep foundation pit have been introduced. Firstly. basing upon the theory of crack-depth between soil and pile, a new calculation method of the slope protection pile is revealed. Secondly, through model tests and engineering practices,a mechanism analysis is made into the double-row-pile and its calculation hypothesis and practical engineering examples have been demonstrated. Thirdly, relying on tests of dowel-peg insertion method to strengthen the slope, the method of construction and engineering patterns have been put to good use. Fourthly, assuming equivalent friction angle as a reference, in this way, the round piles' penetration depth into the slope of protection and the method of maximum moment calculation have been duly derived and brought into practice. Thus the allocation of round pile's reinforcement can be readily designed according to the equivalent sectional area and moment diagram method. Finally, a summary of the round pile-top's ring beam has been made and its application being put forward into good use.

关 键 词：深基坑 护坡桩 设计 施工方法 

分 类 号：TU473.12[建筑科学—结构工程]