Shield head system capable of effectively reducing surrounding rock disturbance

Abstract

The invention discloses a shield head system capable of effectively reducing surrounding rock disturbance. During tunneling, a pressure detection device is used for feeding ground stress detected in real time back to a ground control system, meanwhile, a GIS positioning system positions the real-time position of a shield tunneling machine, and positioning data are fed back to the ground control system. The ground control system combines the real-time positioning data and the real-time ground stress data to conduct calibration and adjustment on two air bags, then, the two air bags are used foradjusting the pushing power of the shield tunneling machine in real time, and the shield tunneling machine is kept with the stable pushing speed. In addition, waterproof slurry is discharged to the connected position of a shield shell I and a shield shell II through grouting holes, then muck and the waterproof slurry are in contact and are mixed, a muck waterproof mixture is formed and extruded through the exterior of the shield shell II, and the muck waterproof mixture is compacted and fixed to the tunnel goaf surface formed after shield tunneling machine tunneling; and accordingly, the soilbody strength and waterproof treatment of the tunnel goaf surface are improved, the effect of preventing ground surface settling is achieved, the side face is flattened, and the water seepage path isreduced.

Description

technical field [0001] The invention relates to a shield head system, in particular to a shield head system which can effectively reduce the disturbance of surrounding rocks. Background technique [0002] At present, by improving the utilization of underground space, ground traffic congestion and other situations can be effectively alleviated. In the process of constructing underground space, due to the constraints of urban environmental factors such as construction sites and road traffic, traditional construction methods are difficult to apply universally. Considering that tunnel construction with shield machine has the advantages of high degree of automation, saving manpower, fast construction speed, one-time hole formation, not affected by climate, control of ground subsidence during excavation, reduction of impact on ground buildings and underwater construction. It does not affect the water surface traffic and other characteristics when digging. Based on the above adva...

AI Technical Summary

Problems solved by technology

However, due to the large disturbance of the soil around the segment during the excavation process, the cutter head of the ordinary shield machine will cause the ground surface to settle; the existing external shell grouting technology can improve the Tunnel support strength; however, it needs to be processed after the tunneling of the shield machine, resulting in low efficiency; at present, there is no shield head system that can be grouted during the tunneling of the shield machine, so that the waterproof grout and the excavation process Part of the generated muck is mixed and extruded outside the shield shell to form a waterproof layer outside the segment, which can not only improve the waterproof ability of the tunnel support structure, but also reduce the amount of muck transported to the surface during the construction process, thereby Reduce the disturbance to the surrounding rock mass, so the shield head system is the research direction of this industry

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