旋喷桩止水帷幕对拉森钢板桩变形的影响分析

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DOI：10.19860/j.cnki.issn1005-8249.2024.01.021

LIANG Sheng1，WANG Xiaolei1，ZHANG Jianying2，YU Tingfu2，ZHANG Zehao1 （1. College of Civil Engineering，Hebei University of Engineering，Handan O56038，China’； 2. Road and Bridge Engineering Branch of China 22 Metallurgy Group Co.，Ltd.， Tangshan O640oo，China） Abstract：Basedonthedepfoundationpit projectofpipegalerydesignedbythewaterproofcurtainofLarsensteelsheetpile + high pressurejetgrouting pileinawater-richstratuminHandanCity，HebeiProvince，thewholeprocessofdewatering excavationof foundatiopitwasnumericallysimulatedbyMidas-GTSsoftware，ndtheinflueneofwaterproofcurtainonthedeformationandstressof supportingstructurewasstudied.Onthebasisofverifyingtheaccuracyofthemodel，theinfluencesofdiferentspacingsbetween waterproofcurtainandsupportingpileanddiferentrowsofwaterproofcurtainonsupportingpileareanalyzedrespectively.hesults showthat the waterprofcurtaincannotonlyprolongtheseepage pathand slowdowntheseepagevelocity，butalsosharesomesoil pressure，whichhasapositiveefectoninhibitingthedeformationandbendingmomentof thesupportingpile.Thediferentspacing betweenterotaryjetgrouingpileandthesupportingpileincreasstheendingstifess，hichcanectivelyliitthefomationnd bending moment of the supporting pile.It is suggested that the spacing should be maintained at 1～3m ，but the inhibitory effect is not obvious after exceeding 5m .The more rows of rotary jet grouting pilewaterproof curtain，the more obvious thesupporting effect is.The relevantresultshave certainreference significancefor theoptimizationof foundation pit engineering in water-rich strata.

Keywords：numerical simulation；deep foundation pit excavation；water-rich strata；water-stopping curtain

0引言

随着中国经济的高速度高质量发展，为城市化进程开启了加速键，这也使得基坑工程逐渐向更深、更广地发展[1-2]。（剩余7723字）