A construction method for rapid start of shield machine for subway tunnel

Abstract

The invention discloses a rapid starting construction method of a shield machine for subway tunnels, which adopts the following steps: 1) feasibility calculation; 2) construction of the top support, middle plate, side wall and end wall of the starting end; When constructing the middle plate of the station outside the starting end, reserve the shield machine trolley starting space and the battery car transportation space; 3) Remove the starting end top support that hinders the hoisting of the first shield machine; 4) Hoist the shield machine 5) Close the hoisting holes on the middle plate of the starting end; 6) Carry out the construction of the top plate of the starting end, and assemble the shield machine on the bottom plate at the same time 7) Carry out the roof waterproofing construction, and excavate the shield muck pool on the side of the foundation pit at the starting end; 8) Start the shield tunneling. The invention can quickly start the development and construction under the condition that the starting end is not capped, and can be carried out intersecting with the construction of the main structure of the station, thereby shortening the construction period and reducing the construction cost.

Description

technical field [0001] The invention relates to the field of subway tunnel construction, in particular to a rapid start-up construction method for a shield machine used in subway tunnels. Background technique [0002] The shield method is a construction method of underground tunnel excavation. The shield shell and the lining structure jointly bear the pressure of the external surrounding rock. The cutting device is used to excavate the soil in front of the excavation front, and the propulsion device is used to excavate according to the soil. The progress continued, and the excavated machinery was used to transport the muck to the ground, thus forming the mechanized construction of the underground tunnel. The shield method is widely used in subway tunnel construction due to its advantages of high safety, fast driving speed, and little impact on ground traffic. [0003] Shield starting and receiving construction is the most important part of shield tunneling construction, and...

AI Technical Summary

Problems solved by technology

Since the geological conditions, hydrological conditions, station foundation pit support form, station main structure layout and other factors are different for each construction project, the degree of influence of shield hoisting construction on foundation pit safety should be based on theoretical calculation data and computer values. It is more scientific and reasonable to conduct a comprehensive analysis of information such as simulation data and on-site actual monitoring data based on the actual conditions of different construction projects; and traditional construction methods have not allowed the main structure of the station to form cross-construction with the construction procedures such as shield machine hoisting and commissioning. The organization is obviously not compact enough to maximize the effectiveness of manpower, materials and machines. Therefore, while paying attention to construction safety, the traditional shield tunneling construction method increases construction costs and prolongs the construction period to a certain extent.

[0005] During the construction process, when encountering special reasons such as complex surrounding environment on site, tight construction schedule, and environmental control, it is necessary to carry out hoisting, commissioning, and initial construction of the shield machine under the uncapped working condition of the starting end of the station. The traditional construction method will It cannot effectively guide the construction, so it is urgent to study a construction method for quickly hoisting, debugging, and starting the shield machine when the starting end is not capped.

Images