盾构渣土改良试验及绿色利用  

An Experiment of Shield Muck Improvement and Analysis of Green Utilization

作　　者：赵涛[1] 郭军[2] 梁庆国[1] 张媛 赵德炎 王燕[4] ZHAO Tao;GUO Jun;LIANG Qingguo;ZHANG Yuan;ZHAO Deyan;WANG Yan(Lanzhou Jiaotong University,Lanzhou,Gansu 730070,China;Shaanxi Railway Institute,Weinan,Shaanxi 714000,China;Urban Rail Transit Project Co.Ltd,China Railway Beijing Engineering Group,Hefei,Anhui 230001,China;Qinghai University,Xining,Qinghai 810016,China)

机构地区：[1]兰州交通大学,兰州730070 [2]陕西铁路工程职业技术学院,渭南714000 [3]中铁北京工程局集团城市轨道交通工程有限公司,合肥230001 [4]青海大学,西宁810016

出　　处：《铁道工程学报》2021年第3期107-112,共6页Journal of Railway Engineering Society

基　　金：陕西铁路工程职业技术学院科研基金和中青年科技创新人才项目(KY2019-41,KJRC201902);国家自然科学基金项目(51968041);陕西省渭南市科技计划项目(2020ZDYF-JCYJ-229);陕西省高校科协青年人才托举计划项目(20190706)。

摘　　要：研究目的:为了分析土压平衡盾构施工产生的渣土特性及其应用,通过开展室内黏性土和细砂的渣土改良试验,研究了黏性土和细砂的坍落度值随膨润土泥浆配合比的变化规律;并结合当前绿色地铁施工理念,提出了盾构渣土的综合应用及绿色渣土应用。研究结论:(1)膨润土泥浆改良后的黏性土和细砂具有明显的流动塑性;随着膨润土泥浆配合比的减小,渣土的黏聚性减小,改良后渣土的坍落度明显增大;(2)低配合比的膨润土泥浆改良细砂,细砂坍落度值呈先快速增加后缓慢增加的趋势;高配合比的膨润土泥浆改良细砂,细砂的坍落度值呈不断增加趋势;(3)响应绿色环保地铁施工理念,盾构渣土的综合利用逐渐转向为绿色利用,包括绿色盾构施工、绿色建筑材料、绿色工业生产、绿色城市建设等领域;(4)本研究结果可为地铁盾构安全施工和渣土综合绿色利用提供一定参考。Research purposes: In order to analyze the characteristics of shield muck produced by the earth pressure balance(EPB) shield construction and its application, by carrying out indoor soil improvement tests for cohesive soil and fine sand, the slump value change law of cohesive soil and fine sand was studied with different mix ratio of bentonite slurry. Meanwhile, combined with the current concept of green subway construction, the comprehensive application and green application of shield muck are proposed.Research conclusions:(1) The cohesive soil and fine sand improved by bentonite slurry have obvious flow plasticity. With the reduction of bentonite slurry mix ratio, the cohesion of improved shield muck decreases, and the slump of improved shield muck increases obviously.(2) The slump value of fine sand improved by low mix ratio of bentonite slurry shows a trend of rapid increase and then slow increase;and the slump value of fine sand improved by high mix ratio of bentonite slurry shows an increasing trend.(3) The comprehensive utilization of shield muck is gradually turning to green utilization, including green shield construction, green building materials, green industrial production, green city construction and other fields in response to the conception of green environmental protection subway construction.(4) The research results can provide a certain reference for the safe construction of subway shield and the comprehensive green utilization of shield muck.

关 键 词：渣土改良 配合比 坍落度 渣土综合利用 绿色渣土 

分 类 号：U455.3[建筑科学—桥梁与隧道工程]