Jacked pile is widely used because of its various advantages such as noiseless , vibrationless , no impact and minor construction stress . however , the obvious compacting effects caused by the penetration of jacked pile may have severe influence on surrounding engineering environment 但是，静压桩属于挤土桩，其产生的挤土效应会对周边环境造成不利的影响，严重者可能造成邻近的建筑物开裂，道路隆起以及地下管线断裂等工程事故。
This thesis in the paper will play a great role in popularizing anchor jacked pile . in this paper , the research of anchor jacked pile is still in its elementary phase , more work should be done to improve it in the future so as to guide the practical engineering 本文的课题对锚杆静压桩的推广使用具有很大的意义和工程实用价值，但本文对该课题的研究仍处于初级阶段，今后需要做更多的工作去完善它，使它能够对工程真正具有指导意义。
This paper respectively uses the method of expansion of cavity and fem to analysis the soil compaction effect of anchor jacked pile while sinking , and compares the calculation result of the two methods by combining effect is valuable to the application of engineering 摘要分别用柱形孔扩张法和有限元方法对锚杆静压桩沉桩过程中的挤土效应进行了分析，并结合工程实例对两种方法计算的结果进行了比较，很好地探讨了沉桩挤土规律，具有一定的工程实用价值。
Thirdly , some shortcomings that numerical simulation ca n ' t effectively applied in jacked pile are proposed . several problems need to be resolved in numerical simulation of jacked pile ; for instance , finite deformation problem , constitutive model of soil , contact between pile and soil and loading problem 3 、根据目前有限元在模拟静压沉桩方面存在的不足，指出了模拟沉桩过程需要解决的问题：土体的有限变形；接触问题；本构关系；位移贯入法的加载问题。
Anchor jacked pile is a new technique researched by ourselves for building reinforce and has some strongpoint others have not . twenty years " popularization makes this technique widely used . now anchor jacked pile can be applied in some other project such as correction , ground strengthening , pile foundation ' s top - down construction in newly built building 锚杆静压桩作为我国自行研制的一种地基托换加固新技术，有着其它施工方法所不具有的自身的优点，经过二十年的推广使用，目前在很多地区已经广泛使用，而且其适用范围也从以前的单一的托换加固作用发展成可用于纠偏、补强加固、新建工程逆作法桩基施工等工程。
As a new technique , few people are familiar with it . this paper will research the technique of pit - jacked pile and building correction to replace by rising , including its developmental history , technique characteristics , advantages , construction process , applied scope , present condition and existent problems in sphere 坑式静压桩顶升纠偏技术作为一项新技术，目前仍有很多人不是很了解，该部分对坑式静压桩技术和顶升纠偏技术的发展历史、技术特点、自身优点、施工过程、适用范围、研究现状以及存在的问题作详细的研究。
According to the fact that the penetrate mechanism of static sounding penetration and static jacking pile is similar , we obtained the predict formula of the static jacked resistance of the precast piles after comparing several engineerings , and can use it in the construction of the precast piles 本文主要依据静力压桩与静力触探贯入相似的机理提出用静力触探指标预估压桩阻力的计算公式，并用杭州粉砂土地区的几个工程实例作分析和验证，为静压桩的设计和施工提供了理论依据。
Elastic - plastic analysis for soil around anchor jacked pile in this paper , the course of penetration is regarded as expansion of cylindrical cavity in infinite soil mass . combining with the knowledge of elastic mechanics and plastic mechanics , we can make analysis for soil around pile . finally , we can educe the cylindrical cavity pressure , radius of plastic zone , radical displacement in elastic zone , excess pore water pressure in soil around pile and spherical cavity pressure at the end of pile 锚杆静压桩桩周土体的弹塑性分析该部分是文章的主要工作所在，本文把压桩过程桩周土体的本构关系看作是水平面的平面应变小孔扩张问题，利用小孔扩张原理，结合弹性力学以及塑性力学的知识，对压桩后土体的性状作出分析，得出桩对土的挤扩作用力、桩周土体塑性半径、弹性区的位移，压桩完成瞬时桩周土体弹性区和塑性区的超孔隙水压力以及桩端球形孔扩张的扩张力。
Hi spite of twenty years " usage in engineering , anchor jacked pile bases on no compellent theory . this paper works primarily in the following aspects : 1 . introduction of anchor jacked pile as a new technique , few people realize it . this paper will introduce anchor jacked pile about its history , strongpoint , construction course , research status quo and some existent problems 对锚杆静压桩作一个介绍锚杆静压桩作为一种新技术，目前还有很多人不是很了解，该部分对锚杆静压桩的发展历史、自身优点、施工过程、适用范围、研究现状以及存在的一些问题作了粗略的介绍。
The integrate expressions of large strain are deduced by means of spm . and the difference of the soil compacting effects in the condition of large strain and small strain is analyzed . secondly , according to the analytical expressions of single jacked pile , the displacement fields of subsequent jacked pile due to the presence of adjacent pile are obtained 2 、在得到静压单桩挤土产生位移场的基础上，运用拉格朗日插值法得到了已存在桩的情况下压桩产生的土体位移场，并推导了二桩，排桩及静压群桩施工产生的迎桩面及背桩面位移场的解析式。
