盾构壁后注浆体在不同地层中固结排水试验研究
发布时间：2018-07-29 07:26
【摘要】：为分析盾构壁后注浆过程中不同类型的浆体在不同地层中固结排水规律的差异,采用自制的浆体固结排水试验装置,模拟盾构壁后注浆体的固结排水过程,对惰性浆、硬性浆和厚浆3种典型浆体在不同地层中的固结排水规律展开研究。结果表明:1)在粉质黏土地层中,浆体的固结排水速度主要由浆体中水分入渗的难易程度决定;2)在粉细砂地层中,浆体的固结排水速度主要取决于浆体的保水性和抗水分散性;3)在渗透系数较大的粗砂地层中,固结初期浆体颗粒间的黏结作用对浆体的固结排水速度影响较大,固结完成后浆体的强度受浆体中胶凝材料的影响较大、受地层渗透系数的影响较小;4)硬性浆固结完成后的7 d强度较3 d强度增加了30%,惰性浆和厚浆固结完成后强度随时间变化较小。
[Abstract]:In order to analyze the difference of consolidation and drainage law of different types of slurry in different strata during the process of post-grouting of shield machine, the self-made slurry consolidation and drainage test device was used to simulate the consolidation and drainage process of grouting body after shield tunneling. The consolidation and drainage laws of three typical types of slurry in different strata are studied. The results show that in silty clay formation, the velocity of consolidation and drainage of slurry is mainly determined by the difficulty of water infiltration in slurry. The consolidation and drainage speed of the slurry mainly depends on the water retention and water dispersibility of the slurry. In the coarse sand formation with high permeability coefficient, the effect of the adhesion between the slurry particles on the consolidation and drainage velocity of the slurry in the early stage of consolidation is greater. The strength of the paste after consolidation is greatly affected by the cementitious material in the paste. The influence of formation permeability coefficient is small (4) the strength of 7 days after consolidation is 30 days higher than that of 3 days, and the strength of inert slurry and thick slurry is less varying with time after the completion of consolidation.
【作者单位】： 河海大学;河海大学岩土力学与堤坝工程教育部重点实验室;河海大学土木与交通学院;
【基金】：国家重点基础研究发展计划(973计划)(2015CB057803) 国家自然科学基金资助项目(51408191)
【分类号】：U455.43
，
本文编号：2151947
[Abstract]:In order to analyze the difference of consolidation and drainage law of different types of slurry in different strata during the process of post-grouting of shield machine, the self-made slurry consolidation and drainage test device was used to simulate the consolidation and drainage process of grouting body after shield tunneling. The consolidation and drainage laws of three typical types of slurry in different strata are studied. The results show that in silty clay formation, the velocity of consolidation and drainage of slurry is mainly determined by the difficulty of water infiltration in slurry. The consolidation and drainage speed of the slurry mainly depends on the water retention and water dispersibility of the slurry. In the coarse sand formation with high permeability coefficient, the effect of the adhesion between the slurry particles on the consolidation and drainage velocity of the slurry in the early stage of consolidation is greater. The strength of the paste after consolidation is greatly affected by the cementitious material in the paste. The influence of formation permeability coefficient is small (4) the strength of 7 days after consolidation is 30 days higher than that of 3 days, and the strength of inert slurry and thick slurry is less varying with time after the completion of consolidation.
【作者单位】： 河海大学;河海大学岩土力学与堤坝工程教育部重点实验室;河海大学土木与交通学院;
【基金】：国家重点基础研究发展计划(973计划)(2015CB057803) 国家自然科学基金资助项目(51408191)
【分类号】：U455.43
，
本文编号：2151947
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