华北水利水电大学学报（自然科学版）
華北水利水電大學學報（自然科學版）
화북수이수전대학학보（자연과학판）
Journal of North China University of Water Resources and Electric Power
2015年
5期
56-61
,共6页
雁洲水闸%水泥土搅拌桩%淤泥地基%地基处理%抗滑稳定%饱和砂土液化
雁洲水閘%水泥土攪拌樁%淤泥地基%地基處理%抗滑穩定%飽和砂土液化
안주수갑%수니토교반장%어니지기%지기처리%항활은정%포화사토액화
Yanzhou sluice%cement-soil mixing columns%silt foundation%foundation treatment%stability against sliding%saturated sand liquefaction
雁洲水闸坐落在第四系海陆交互相沉积( Qmc )的深厚淤泥上,这种软土地基土体强度低、压缩变形大、地震条件下可能产生震陷,淤泥下及其内夹砂壤土层还存在饱和砂土液化问题,需要进行地基处理,以提高地基承载力、减小沉降量、消除砂土液化和震陷,提高闸室抗滑稳定性.经地基处理方案比选,选择了水泥土搅拌桩方案,采用格栅式布置,置换率约30. 2%,桩长12 m,桩径600 mm,桩体28 d抗压强度值不小于1. 3 MPa.施工完成的搅拌桩质量检测全部合格,可为类似地基的处理提供参考.
雁洲水閘坐落在第四繫海陸交互相沉積( Qmc )的深厚淤泥上,這種軟土地基土體彊度低、壓縮變形大、地震條件下可能產生震陷,淤泥下及其內夾砂壤土層還存在飽和砂土液化問題,需要進行地基處理,以提高地基承載力、減小沉降量、消除砂土液化和震陷,提高閘室抗滑穩定性.經地基處理方案比選,選擇瞭水泥土攪拌樁方案,採用格柵式佈置,置換率約30. 2%,樁長12 m,樁徑600 mm,樁體28 d抗壓彊度值不小于1. 3 MPa.施工完成的攪拌樁質量檢測全部閤格,可為類似地基的處理提供參攷.
안주수갑좌락재제사계해륙교호상침적( Qmc )적심후어니상,저충연토지기토체강도저、압축변형대、지진조건하가능산생진함,어니하급기내협사양토층환존재포화사토액화문제,수요진행지기처리,이제고지기승재력、감소침강량、소제사토액화화진함,제고갑실항활은정성.경지기처리방안비선,선택료수니토교반장방안,채용격책식포치,치환솔약30. 2%,장장12 m,장경600 mm,장체28 d항압강도치불소우1. 3 MPa.시공완성적교반장질량검측전부합격,가위유사지기적처리제공삼고.
Yanzhou sluice is located on the deep silt of quaternary marine-terrigenous facies deposit ( Qmc ) . This soft soil ground with a characteristic of low strength and strong compaction deformation may lead to seismic subsidence. Moreover, the saturated sand lique-faction of the sand-layered soil in and below the silt is another problem. Thus, the foundation treatment is needed to improve the bear-ing capacity of foundation, reduce the ground settlement, avoid sand liquefaction and seismic subsidence, and also improve the stability against sliding of the sluice. By comparison and selection among foundation treatment schemes, the scheme of the cement-soil mixing columns is chosen. In this scheme, columns are arranged in grid with the replacement rate of 30. 2%, the length of 12 m, the diameter of 600 mm and 28 d compressive strength no less than 1. 3 MPa. The quality inspections of all the mixing columns constructed are all qualified, and this can provide a reference for similar foundation treatments.
