为解决城市隧道盾构废弃泥浆就地脱水场地受限、运输车直接外运成本高等问题，以武汉两湖隧道工程为例，研究长距离管道输送方案的可行性。首先进行室内试验和现场数据收集，对比分析并推荐高精度摩阻损失计算公式，基于能耗分析，推荐浆体输送密度；在此基础上，提出长距离管道输送船舶配置方案，计算理论产量，优化推荐施工参数，并进行方案论证。研究表明： 1）盾构废弃泥浆输送阻力分析计算应考虑泥浆流变特性的影响，较高输送密度有利于降低输送能耗； 2）盾构废弃泥浆采用长距离管道输送方案具工程可实施性，多泵接力输送方案可满足本工程盾构废弃泥浆的外运需求； 3）选取合理的施工参数，可在保证废弃泥浆输送产量的同时，有效降低施工能耗，扩展输送系统工程适应能力，提升综合施工效率。
The waste slurry generated
by urban shield tunneling faces challenges such as limited dewatering sites and
high direct transportation costs by vehicles. A case study of the Lianghu
tunnel in Wuhan, China, is conducted to evaluate the feasibility of the long-distance pipeline transportation of slurry. Laboratory tests and
field data collection are carried out, and a high-precision
friction loss calculation formula is recommended. Based on energy consumption
analysis, the optimal slurry conveying density is proposed. Subsequently, a
long-distance pipeline transport configuration scheme
is developed, the theoretical output is calculated, recommended construction
parameters are optimized, and the scheme′s feasibility
is demonstrated. The results reveal the following: (1) The influence of slurry
rheological properties should be considered when calculating friction
resistance, as maintaining a suitable high concentration reduces transport
energy consumption. (2) Long-distance pipeline
transport technology for shield tunneling waste slurry is feasible from an
engineering perspective: a multi-booster-pump transport scheme effectively meets waste slurry transport
requirements. (3) Selecting appropriate operating parameters ensures effective
waste slurry transport, reduces construction energy consumption, enhances the
adaptability of the transport system, and improves construction efficiency.
