3条天然气管道并行顶管穿越高速公路分析

Analysis of Three Natural Gas Pipelines Crossing Expressway by Parallel Jacking

结合工程案例,探讨单管顶管穿越高速公路时最大地面沉降量计算式和3条天然气管道(简称管排)并行顶管穿越高速公路时最大地面沉降量计算式。管排顶管穿越时最大地面沉降量发生在中间管道顶管位置,两侧管道顶管对中间管道顶管位置的地面沉降量造成叠加。介绍顶管注浆加固方案。

Combined with an engineering case,the calculation formula of maximum ground settlement when a single pipe jacking crosses the expressway and the calculation formula of maximum ground settlement when three natural gas pipelines(referred to as the pipe row)are jacked in parallel to cross the expressway are discussed.The maximum ground settlement of pipe row pipe jacking crossing occurs at the pipe jacking position of the middle pipe,and pipe jacking at both sides of the pipe causes superposition of the ground settlement at the pipe jacking position of the middle pipe.The pipe jacking grouting reinforcement scheme is introduced.