复杂条件下综合管廊深基坑支护设计选型研究

Research on Design of Deep Foundation Pit Support for Integrated Pipe Gallery under Complicated Conditions

城市地下综合管廊在现有市政工程大环境下,有其独特的经济性及空间时序性,而对应不同工程地质条件下其建设经济性指标主要取决于基坑支护形式的合理性。本文以某现有城市主干道规划绿化带下方的拟建地下电力专用综合管廊基坑支护为案例,根据高压电缆入廊的工艺需求,结合全线3.21km复杂多变的地质条件、现有道路旁管线及构筑物保护、电力管廊节点较多等各项约束条件,进行管廊深基坑支护的设计方案分析,通过实际工程的专项评审及设计方案不断优化,旨在为类似工程条件下综合管廊基坑支护设计施工提供参考。

As one kind of public works,urban underground integrated pipe gallery is of unique economic efficiency,spatial and time sequences.Its economic indicators corresponding to different engineering geological conditions mainly base on the rationality of foundation pit support pattern.By analyzing the foundation pit support for the proposed underground electric power pipe gallery under the planned green belt along the existing urban trunk road,the technological requirements for high-voltage cable going through the gallery are combined with complex and changeable geological conditions within the range of 3.21 km in length,a variety of constraints such as the protection of the existing roadside pipelines and structures,and more joints set on the electric power pipe gallery are taken into account to carry out the analysis of the design plan of deep foundation pit support for the pipe gallery.Furthermore,continuous optimization of the design plan based on specialized review of the project will provide a reference for the design and construction of foundation pit support for integrated pipe gallery under similar engineering conditions.