深圳北环电缆隧道竖井设计与优化研究

Research on Shafts Design and Optimization of the Shenzhen North Cable Tunnel Massive

本文通过对深圳北环电缆隧道众多竖井进行平面归一化和深度归一化设计后,使得竖井的工作量大为减少,给竖井的设计、施工和管理带来便利。同时对竖井的断面型式及支护型式进行优化研究,发现矩形竖井截面利用率较高,其围护结构受到的弯矩剪力值较大;圆形竖井截面利用率较低,其围护结构受到的弯矩剪力值较小,其轴力值较大。可以根据竖井平面尺寸大小、周边环境、地质情况等影响因素来优选竖井截面及支护型式。

Through the graphic normalization design and depth normalization design of Shenzhen North Nable Tunnel massive shafts in this paper,the workload of these shafts is greatly reduced,which brings convenience to the design,construction and management of the shafts. At the same time,the section types and support types of these shafts are optimized. It can be found that the utilization ratio of rectangular shaft is higher,but the bending moment and shear force of support structure are larger. The utilization ratio of circular shaft section is lower,but the bending moment and shear force of support structure are smaller,and its axial force is larger. The section types and support types can be optimized according to the factors such as the size of the shaft plane,the surrounding environment and the geological conditions.