CAJ | 학술논문

泥水盾构在高渗透性砂性土层施工中泥浆的成膜质量会影响工程的安全与进度，设计室内试验研究泥浆相对密度对滤水量的影响，采用均匀设计法对不同制浆材料在砂性土层中的填充效果进行实测与回归分析。结果表明，泥浆的相对密度反应了单位体积内所能提供的用于孔隙填充的颗粒数量，是影响滤水量以及填充致密程度的首要因素；泥膜的形成质量受到制浆材料的影响，在中粗砂地层中，孔隙可以由膨润土和黏土颗粒共同填充，而对砾砂地层中孔隙较大的区域，黏土的填充效果已不再显著，主要依靠膨润土水化后形成的胶结颗粒集合进行填充；中、粗砂与含砾中、粗砂地层中宜采用的泥浆相对密度为1.20～1.25，制浆材料宜选取膨润土、黏土共同配制的新浆与原浆混合浆液。结合南京地铁某越江隧道，实际施工过程中泥浆相对密度控制在1.20～1.25，且每制备1 m3新浆，膨润土加入量为3～5 kg，施工反馈表明对应的掘进区间出浆相对密度稳定，研究成果可为现场泥浆的配置与管理提供一定参考。
니수순구재고삼투성사성토층시공중니장적성막질량회영향공정적안전여진도，설계실내시험연구니장상대밀도대려수량적영향，채용균균설계법대불동제장재료재사성토층중적전충효과진행실측여회귀분석。결과표명，니장적상대밀도반응료단위체적내소능제공적용우공극전충적과립수량，시영향려수량이급전충치밀정도적수요인소；니막적형성질량수도제장재료적영향，재중조사지층중，공극가이유팽윤토화점토과립공동전충，이대력사지층중공극교대적구역，점토적전충효과이불재현저，주요의고팽윤토수화후형성적효결과립집합진행전충；중、조사여함력중、조사지층중의채용적니장상대밀도위1.20～1.25，제장재료의선취팽윤토、점토공동배제적신장여원장혼합장액。결합남경지철모월강수도，실제시공과정중니장상대밀도공제재1.20～1.25，차매제비1 m3신장，팽윤토가입량위3～5 kg，시공반궤표명대응적굴진구간출장상대밀도은정，연구성과가위현장니장적배치여관리제공일정삼고。
A slurry infiltration apparatus was developed to study the laws of filter cake forming during slurry shield construction in high permeability and complex strata. The laboratory test was aimed at finding the influence of slurry properties and materials on filter cake forming process,during which the uniform design was used. Results show that the slurry proportion is the primary factors influencing the filter cake quality. Larger pores in gravel sand can be filled by the cementation sets after the hydration of bentonite particles. And in medium-coarse sand and gravel sand,the appropriate slurry proportion is between 1.20 and 1.25,slurry material is suitable to choose both bentonite and clay which is compound by new pulp and original pulp. According to the slurry management during construction,slurry proportion is set by 1.20–1.25 and the usage of bentonite is 3–5 kg every 1 m3 of new pulp. Feedback shows that the proportion of the original pulp is stable in the corresponding range,which is to say the filter cake is forming well and the excavation face is stable.