盾尾注浆的无水卵石地层地表沉降特征研究

发布时间：2018-01-13 22:29

本文关键词：盾尾注浆的无水卵石地层地表沉降特征研究　出处：《山东交通科技》2016年06期 　论文类型：期刊论文

【摘要】：以乌鲁木齐一号线地铁某盾构区间为背景,结合施工穿越的土层—无水卵石地层的地层强度以及力学参数等工程地质特征,运用FLAC3D软件进行数值模拟盾构开挖过程,得出盾构开挖穿越该地层会对沉降产生影响。为了使沉降达到施工要求,采用不同厚度的注浆层进行数值模拟,得出盾尾注浆能够有效减小地表及其穿越的拱顶沉降,保证安全穿越该土层。
[Abstract]:Taking a shield section of Urumqi Line 1 as the background, combined with the engineering geological characteristics such as the stratum strength and mechanical parameters of the soil layer and the anhydrous pebbles through which the construction is carried out. Using FLAC3D software to simulate the excavation process of shield tunneling, it is concluded that the shield excavation across the stratum will have an impact on the settlement, in order to make the settlement meet the construction requirements. Through numerical simulation of different thickness grouting layer, it is concluded that shield tail grouting can effectively reduce the settlement of the surface and the vault through it, and ensure the safe crossing of the soil layer.
【作者单位】：乌鲁木齐城市轨道集团有限公司;
【基金】：乌鲁木齐市建设科技项目基金资助,项目编号:H151312001
【分类号】：U455.43
【正文快照】： 引言乌鲁木齐地铁1号线工程沿线地层以第四系上更新统砂卵石为主,地质勘查过程中未见明显地下水偶有大漂石出现,属典型无水砂卵石地层,由于无水砂卵石地层的松散型以及粘聚力低,必须进行盾尾直降技术来减小盾构掘进过程中的沉降。此次注浆加固的目的是通过浆体固结和充填砂卵

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