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时间:2018-01-12
《客运专线岩溶区地基注浆加固研究》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、客运专线岩溶区地基注浆加固研究张文学陈壮刘海陆(北京工业大学,北京100124)摘要:研究目的:随着客运专线规划与建设在全国展开,客专桥梁穿越岩溶区现象比较常见,如何分析岩溶区注浆加固对桩基沉降的控制效果,并确定合理的注浆加固方案是岩溶区铁路客运专线桥梁桩基设计面临的问题。以某岩溶区铁路客运专线桩基为依托工程,利用基于规范的理正软件,分析不同注浆方案对桩基沉降的控制效果,在此基础上确定合理的岩溶区地基注浆加固方案。研究结论:通过研究得出:(1)只对溶洞注浆可以较好地控制桩基倾斜,但不能有效控制桩基竖向沉降量;(2)只对桩尖土层注浆可以有效控制桩基竖向沉降,但不能有效控制桩基
2、倾斜;(3)同时对溶洞和桩尖土层注浆既可以控制竖向沉降,又可以控制倾斜,是为较合理的加固方案;(4)以上结论可为岩溶区桩基注浆加固提供参考。关键词:客运专线;桩基;沉降量;岩溶;溶洞;注浆中图分类号:U448.35;U442.51文献标识码:AResearchontheFoundationGroutingReinforcementSchemeinKarstAreaofPassengerDedicatedLineZHANGWen-xue,CHENZhuang,LIUHai-lu(BeijingUniversityofTechnology,Beijing100124,China)Ab
3、stract:Researchpurposes:Withthedevelopmentofplanningandconstructionofrailwaypassengerdedicatedlineinournationwide,itismorecommonforrailwaybridgestopassthroughkarstareas.Asaresult,howtoanalyzetheeffectofgroutingreinforcementonthesettlementofpilefoundationanddetermineareasonablegroutingreinforc
4、ementschemehasbecometheproblemofdesigningapilefoundationofrailwaybridgeinkarstareas.Basedonpilefoundationengineeringofarailwaypassengerdediciatedlineinkarstarea,genuineLizhengSoftwarethatbasedoncodewasusedtoanalyzetheeffectofdifferentgroutingreinforcementschemeonthesettlementofpilefoundation,
5、atthesametimereasonablegroutingreinforcementschemewasselected.Researchconclusions:(1)Onlygroutingkarstcavecancontrolthetiltofpillfoundationwell,butitcannotcontrolthesettlementofpilefoundationeffectively.(2)Onlygroutingthesoillayeratpiletipcancontrolthesettlementofpilefoundationeffectively,but
6、itcannotcontrolthetiltofpillfoundationwell.(3)Groutingbothkarstcaveandthesoillayeratpiletipnotonlycancontrolthetiltofpillfoundationwell,butalsocancontrolthesettlementofpilefoundationeffectively,astheresultitisabettergroutingreinforcementscheme.(4)Theaboveconclusionscanprovidereferencefortheen
7、gineeringofpilefoundationgroutingreinforcementinkarstarea.Keywords:passengerdedicatedline;pilefoundation;settlement;karst;karstcave;grouting收稿日期:2013-11-22基金项目:国家自然科学基金(51278015)作者简介:张文学,1975年出生,男,副教授。29张文学陈壮刘海陆:客运专线岩溶区地基注浆加固研究第7期左右;不均匀层的每
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