水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2014年
1期
30-33
,共4页
黄土地层%锚索%预应力荷载%影响因素
黃土地層%錨索%預應力荷載%影響因素
황토지층%묘색%예응력하재%영향인소
loess layer%anchor cable%anchor capacity%influencing factor
黄土层中影响锚索预应力的影响因素研究中，通过现场的具体试验且较全面地分析计算各因素影响效果的研究资料较少。选取西安某黄土基坑为试验场地，通过现场试验并结合分析计算，探讨了注浆体材料、注浆压力、锚索孔径大小、岩土体特性、补偿张拉、大气降水、钢绞线松弛、锚具及夹片回弹这八个因素，对锚索预应力荷载大小的影响。试验表明：注浆体材料、锚索孔径大小与岩土体特性的内部因素及注浆压力大小、补偿张拉的外部因素是影响黄土层中锚索预应力荷载的主要因素；黄土层中锚索张拉锁定后，预应力荷载损失较大，并且在张拉锁定后一周内是预应力急剧减小阶段。
黃土層中影響錨索預應力的影響因素研究中，通過現場的具體試驗且較全麵地分析計算各因素影響效果的研究資料較少。選取西安某黃土基坑為試驗場地，通過現場試驗併結閤分析計算，探討瞭註漿體材料、註漿壓力、錨索孔徑大小、巖土體特性、補償張拉、大氣降水、鋼絞線鬆弛、錨具及夾片迴彈這八箇因素，對錨索預應力荷載大小的影響。試驗錶明：註漿體材料、錨索孔徑大小與巖土體特性的內部因素及註漿壓力大小、補償張拉的外部因素是影響黃土層中錨索預應力荷載的主要因素；黃土層中錨索張拉鎖定後，預應力荷載損失較大，併且在張拉鎖定後一週內是預應力急劇減小階段。
황토층중영향묘색예응력적영향인소연구중，통과현장적구체시험차교전면지분석계산각인소영향효과적연구자료교소。선취서안모황토기갱위시험장지，통과현장시험병결합분석계산，탐토료주장체재료、주장압력、묘색공경대소、암토체특성、보상장랍、대기강수、강교선송이、묘구급협편회탄저팔개인소，대묘색예응력하재대소적영향。시험표명：주장체재료、묘색공경대소여암토체특성적내부인소급주장압력대소、보상장랍적외부인소시영향황토층중묘색예응력하재적주요인소；황토층중묘색장랍쇄정후，예응력하재손실교대，병차재장랍쇄정후일주내시예응력급극감소계단。
In the experiment and analysis ,the influencing factors of the anchor cable’s capacity in loess layer have not been discussed fully .Here ,selecting a loess foundation pit in Xi’an as a test site ,some important factors as the grouting materials ,grouting pressure ,cable aperture size ,characteristics of rock and soil ,compensating tensioning ,atmospheric precipitation ,steel strand relaxation ,anchorage and clip contraction Influencing the cable ’ s capacity in loess layer are discussed in detail through the theoretical analysis and calculation .The experiments show that the internal factors of the grouting material ,cable size and rock-soil characteristics as well as the external factors of the grouting pressure and com-pensating tensioning are main factors affecting the cable’s capacity in loess layer .The anchor cable’s capacity are lost more greatly when the anchor tensioning is locked down ,especially within one week .
