CAJ | 학술논문

利用浆体变形单元体模型试验装置,研究了不同浆体压力、不同围岩土质条件以及不同地下水压作用下的盾构壁后注浆体的变形规律.试验研究表明,较高的浆体压力有利于加快浆体排水固结速率并增大浆体的最终变形量.土体的渗透系数是影响浆体变形的重要因素.在砂性土体中,地下水压对浆体的变形影响较大,在粘性土体中,浆体压力对浆体的变形影响较大.该装置可以用于研究浆液注入盾尾空隙后的受力状态、浆体的变形特性,有助于更深入地明确壁后注浆控制地层应力释放和地层变形作用.
이용장체변형단원체모형시험장치,연구료불동장체압력、불동위암토질조건이급불동지하수압작용하적순구벽후주장체적변형규률.시험연구표명,교고적장체압력유리우가쾌장체배수고결속솔병증대장체적최종변형량.토체적삼투계수시영향장체변형적중요인소.재사성토체중,지하수압대장체적변형영향교대,재점성토체중,장체압력대장체적변형영향교대.해장치가이용우연구장액주입순미공극후적수력상태、장체적변형특성,유조우경심입지명학벽후주장공제지층응력석방화지층변형작용.
Utilizing the self-made unit-body model test apparatus, the deformation laws of backfill grouting were studied under different grouting pressures, different soil conditions and different ground water pressures. It was shown that high grout pressures can accelerate the consolidation rate of grout drainage and increase final deformation amount. And soil permeability coefficient was an important factor to grout deformation. The ground water pressure was more important for sand soil while the grout pressure was for clay soil. The proposed apparatus can truly reflect stress status of grout injected to tail void. And grout deformation properties were helpful to clarify the stratum stress release and stratum deformation of backfill grouting.