Post Grouting Technique For The Bearing Capacity Of Bored Pile Influence And Research

At present mainly through the post grouting technique to improve the vertical bearing capacity of the pile foundation. And also have some theory research and very skilled in operation process. But the post grouting technique effect the pile’s the level bearing capacity which are lack of the theoretical and the practical.This article through the pile foundation level static load test to research the post grouting technique can improve soil quality and can improve the bearing capacity of pile to some extent.The bored pile is a chief type of foundations used in high building and bridge.Generally, previous design workers don’t consider the level bearing capacity of pile.Assume that the pile only bear the vertical load,also by setting up the horizontal pile to bear the load.Until the 60s, With the universal application of large diameter pile, through the research of the pile bearing mechanism and the analysis of many calculation methods. Accumulated the massive data of the pile static load test.Practice Shows, the pile it is not only a axial press member bar,but aslo the pile can bear fairly level load by means of the shearing force and the bending moment. Studying found that a pile can bear hundreds of tons horizontal load or even. And with the develop of offshore oil platform、sea-crossing bridge and wharf,In port and bridge,the pile to bear horizontal capacity is very important.Based on a amount of at home and abroad literatures,Combined with Du Jiang Yan bridge in SiChuan and the country gymnasium,Complete the following main jobs:Firstly, through vertical static load test result of Du Jiang Yan bridge to analysis post grouting technique influence the pile’s vertical bearing capacity;Through the test result summarize that fit Du Jiang Yan area with post grouting technique methods.Secondly, through the country gymnasium project, According to the grouting and don’t grouting test results, Analysis the post grouting technique influence the bearing capacity of pile.Thirdly, in view of the importance of project, requirement imitate the pile’s actual working condition as far as possible.Generally horizontal test pile can divide intol the freedom of top pile and the fixed of top pile.This article through the fixed of two piles to analysis group piles influence the horizontal bearing capacity of pile. Study the pile and soil can in company with influence the horizontal bearing capacity of pile and the horizontal resistance of soil.