施工技术
施工技術
시공기술
CONSTRUCTION TECHNOLOGY
2014年
21期
74-77
,共4页
地下工程%桩基础%预应力管桩%偏位%断桩%处理
地下工程%樁基礎%預應力管樁%偏位%斷樁%處理
지하공정%장기출%예응력관장%편위%단장%처리
underground%piles%prestressed pipe piles%deviation%broken pile%treatment
预应力管桩成桩质量好，承载力高，基础造价低，在江浙地区应用广泛。但在复杂地质情况下，特别是宁波软土地区，极易出现管桩偏位、断桩、斜桩等现象。结合工程实例，分析了预应力管桩产生偏位的原因，介绍了预应力管桩偏位的处理方法：准确测量偏位情况、低应变动测确定桩身损伤情况、根据管桩偏位及损伤情况采用针对性的处理措施如管桩内芯放钢筋笼灌芯加固处理以及承台地梁加强和补桩等。
預應力管樁成樁質量好，承載力高，基礎造價低，在江浙地區應用廣汎。但在複雜地質情況下，特彆是寧波軟土地區，極易齣現管樁偏位、斷樁、斜樁等現象。結閤工程實例，分析瞭預應力管樁產生偏位的原因，介紹瞭預應力管樁偏位的處理方法：準確測量偏位情況、低應變動測確定樁身損傷情況、根據管樁偏位及損傷情況採用針對性的處理措施如管樁內芯放鋼觔籠灌芯加固處理以及承檯地樑加彊和補樁等。
예응력관장성장질량호，승재력고，기출조개저，재강절지구응용엄범。단재복잡지질정황하，특별시저파연토지구，겁역출현관장편위、단장、사장등현상。결합공정실례，분석료예응력관장산생편위적원인，개소료예응력관장편위적처리방법：준학측량편위정황、저응변동측학정장신손상정황、근거관장편위급손상정황채용침대성적처리조시여관장내심방강근롱관심가고처리이급승태지량가강화보장등。
The prestressed pipe pile has a variety of desired characteristics such as high bearing capacity, low cost and good quality, and has an extensive use in Jiangsu and Zhejiang area. But in the most case of complex ground, especially if it’ s in the soft soil of Ningbo, the concrete pile has the tendency to being deviated, broken and sloped when hammered. Based on an engineering example, the reason of sloping prestressed pipe piles and the treatment measures are given. First of all, the sloping condition of each pile should be made clearly, then the damaged position of each pile is found out using low strain dynamic tests, and finally treatment measures are put forward, such as placing reinforcement cage and pouring concrete in the cores of piles, strengthening through cushion caps and grade beams and adding bored piles.
