盾构渣土置拌同步浆液及其在叠落隧道应用研究

针对盾构渣土资源化利用，依托苏州轨道交通 8 号线，基于实验室研究改进固化材料配比，将区间线路盾构渣土置拌成符合工程要求的同步注浆浆液。同时，新建 8 号线双线盾构隧道与既有 3 号线双线隧道在唐庄站交汇，形成两层四线叠落的特殊工况。本项目使用的渣土浆液稠度约为 113 mm，7 d 强度≥1 MPa，28 d 强度≥2.5 MPa，满足工程要求。掘进过程中既有隧道结构的监测数据表明，盾构渣土浆液可以有效地控制新建盾构对既有建(构)筑物的影响。利用盾构渣土制备同步注浆浆液可实现渣土资源化利用，在推进绿色建造的同时降低隧道(双线)施工成本约 75 万元/km。

Use of Shield Muck to Produce Grouting Materials and Its Applicationsin Stacked Tunnels

Focusing on the reuse of tunnel muck, this study aims to prepare tunnel muck from the Suzhou Metro Line 8 into asynchronous grouting material that satisfies the engineering requirements of different geological conditions by adjusting thesolidification material compositions through laboratory experiments. In this project, a new double-line shield tunnel of MetroLine 8 intersects the existing double-line tunnel of Line 3 at Tangzhuang Station, forming a unique layout with two layers offour tracks. The muck-produced grout used in this project has a consistency value of 113 mm, and the 7- and 28-day strengthsexceed 1 and 2.5 MPa, respectively, satisfying the engineering specifications. The deformation monitoring data show that themuck-produced grout effectively controls the impact of the upper tunnel construction on existing structures. Utilizing shieldtunneling muck to prepare synchronous grouting slurry can achieve resource utilization of muck while promoting green constructionand reducing construction costs by approximately 750 thousand Yuan per kilometer (double line).