【摘要】 对于泥水盾构泥水循环系统设计的关键是进排浆泵配置。泵的流量与扬程应大于临界流速时所需要的最小流量与扬程,同时小于最大掘进速度时需要的流量与扬程。根据武汉长江隧道工程条件,结合经验公式分别计算临界流速与最大掘进速度时的流量与扬程,在此基础上确定进、排浆泵的配置。并根据实际施工情况,分析进浆密度变化时,泥水循环系统所能满足的最大掘进速度。更多还原

【Abstract】 The key of the design of the slurry circulation systems of slurry shields is the selection of the slurry feeding/discharging pumps.The flow rates and lifts of the pumps shall be larger than the minimum flow rates and lifts under the critical flow rates and shall be smaller than the flow rates and lifts under the maximum boring advance rates.In the paper,the flow rates and lifts under critical flow rates and maximum boring advance rates are calculated as per empirical formulas on basis of the actual conditions of Wuhan Yangtze River Crossing Tunnel Project.In this way,proper slurry feeding/discharging pumps are selected.Furthermore,the maximum boring advance rates under different feeding slurry densities that the slurry circulation systems can guarantee are analyzed on basis of the actual construction conditions.更多还原