摘要
为了解决土压平衡盾构渣土堆积、外运对城市环境的影响问题,依托杭州地铁10号线某工区盾构隧道工程,针对黏土地层,提出盾构渣土再利用作为同步注浆材料方案。通过均匀试验方法开展配比试验,并对试验结果进行线性回归和单因素分析,探究各因素对浆液关键性能指标的影响规律,其中28 d抗压强度和2 d结石率均随渣土质量分数增加而明显增大,3 h泌水率则减小。研究发现在水胶质量比为0.65,胶砂质量比为0.7,渣土质量分数为5%,水泥质量分数为30%时,浆液各项参数均符合要求,这也为土压平衡盾构渣土再利用提供一种新思路。
In order to solve the problem of EPB(earth pressure balance)shield muck accumulation and transportation impact on the urban environment,relying on the shield tunnel project in a work area of Hangzhou Metro Line 10,for the clay soil layer,the shield muck reuse was proposed as synchronous grouting material.In the scheme,the slurry performance was tested by uniform test method.Linear regression and single factor analysis were performed on the test results.Among them,the 28 d compressive strength and the 2 d hardening rate were both increased significantly with the increase of the proportion of muck,while the 3 h bleeding rate decreased accordingly.It was found that when the waterbinder mass ratio was 0.65,the cement-sand mass ratio was 0.7,the residue mass fraction was 5%,and the cement mass fraction was 30%,all the parameters of the slurry met the requirements.The influence of each factor on the key performance indicators of the slurry was explored to provide a new idea for the reuse of earth pressure balance shield muck.
作者
钱鑫
管超
陈一元
令凡琳
王树英
QIAN Xin;GUAN Chao;CHEN Yiyuan;LING Fanlin;WANG Shuying(Communications Engineering Construction Branch of CCCC,the Third Harbor Engineering Co.,Ltd.,Shanghai 200940,China;School of Civil Engineering,Central South University,Changsha 410075,Hunan,China)
出处
《隧道与地下工程灾害防治》
2020年第1期68-74,共7页
Hazard Control in Tunnelling and Underground Engineering
作者简介
第一作者:钱鑫(1989—),男,江苏溧阳人,工程师,硕士,主要研究方向为市政工程.E-mail:xqia@hotmail.com;通信作者:令凡琳(1996—),男,陕西宝鸡人,硕士,主要研究方向为盾构隧道工程.E-mail:lotusling@csu.edu.cn
