探矿工程-岩土钻掘工程
探礦工程-巖土鑽掘工程
탐광공정-암토찬굴공정
EXPLORATION ENGINEERING (DRILLING & TUNNELING)
2014年
5期
66-68
,共3页
循环式注浆%钢管桩%托换%桩基补强%承载力
循環式註漿%鋼管樁%託換%樁基補彊%承載力
순배식주장%강관장%탁환%장기보강%승재력
circulation grouting%steel pipe pile%underpinning%pile foundation reinforcement%bearing capacity
灌注桩施工过程中,经常遇到不良地层,导致在灌注桩身混凝土的过程中,孔壁局部坍塌,使得土体进入混凝土中,造成灌注桩断桩、桩身混凝土存在缺陷及桩端承载力不足等情况。而高压循环注浆结合钢管托换补强技术可以很好地对上述问题进行处理。结合桩基补强工程实例,对其设计、计算和应用进行探讨和分析,并对高压循环注浆结合钢管托换补强技术加固效果进行抽心检测,检测结果表明:经补强加固后的桩基承载力满足设计要求。
灌註樁施工過程中,經常遇到不良地層,導緻在灌註樁身混凝土的過程中,孔壁跼部坍塌,使得土體進入混凝土中,造成灌註樁斷樁、樁身混凝土存在缺陷及樁耑承載力不足等情況。而高壓循環註漿結閤鋼管託換補彊技術可以很好地對上述問題進行處理。結閤樁基補彊工程實例,對其設計、計算和應用進行探討和分析,併對高壓循環註漿結閤鋼管託換補彊技術加固效果進行抽心檢測,檢測結果錶明:經補彊加固後的樁基承載力滿足設計要求。
관주장시공과정중,경상우도불량지층,도치재관주장신혼응토적과정중,공벽국부담탑,사득토체진입혼응토중,조성관주장단장、장신혼응토존재결함급장단승재력불족등정황。이고압순배주장결합강관탁환보강기술가이흔호지대상술문제진행처리。결합장기보강공정실례,대기설계、계산화응용진행탐토화분석,병대고압순배주장결합강관탁환보강기술가고효과진행추심검측,검측결과표명:경보강가고후적장기승재력만족설계요구。
Bad geological conditions are often encountered in bored pile construction process, which cause local collapse of hole wall and soil mixing into concrete in the concrete grouting; these lead to bored pile broken, concrete defects in pile body and insufficient bearing capacity of pile end.High pressure circulation grouting with steel pipe underpinning reinforce-ment technology can be very good to deal with the problem.Take high pressure circulation grouting with steel pipe under-pinning reinforcement technology as the research object and with the engineering case of pile foundation reinforcement, a-nalysis is made on the design, calculation and application;the reinforcement effect is tested by core-collection, test results show that the bearing capacity of pile foundation meets the design requirements after reinforcement.