Hard rock tunnel construction method based on water power cutting

Abstract

The invention discloses a hard rock tunnel construction method based on water power cutting. The hard rock tunnel construction method based on the water power cutting is characterized by constructing multiple tunnel sections from back to front along the longitudinal extending direction of a tunnel. When any one tunnel section is constructed, the process is as follows: 1, surrounding rock classification advanced detection; 2, construction parameter confirmation, wherein the confirmed construction parameters comprise cutting parameters of a water power cutting machine and split force of a hydraulic splitter; 3, current constructed tunnel section construction: constructing multiple cutting sections of the current constructed tunnel sections from back to front along the longitudinal extending direction of the tunnel, wherein when any one cutting section is constructed, the process is as follows: construction preparation, water power cutting, hydraulic splitting and rectangular cutting block outward transporting; 4, repeating steps one, two and three for many times until the construction process of the constructed hard rock tunnel is finished. The method provided by the invention is simple in steps, convenient to implement, lower in input cost, high in construction efficiency, good in construction effect, and can simply, conveniently and quickly finish the construction process of the hard rock tunnel.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a hydraulic cutting-based hard rock tunnel construction method. Background technique [0002] Hard rock tunnel refers to the construction tunnel where the surrounding rock of the tunnel excavation section is hard rock, such as sedimentary rock, igneous rock, metamorphic rock, etc. There are two main construction methods for traditional hard rock tunnels, namely the drill and blast method and the TBM method. Among them, the drilling and blasting method refers to the method of drilling blastholes and filling explosives in the face of the tunnel, and relying on explosives to break rocks to form a tunnel section. The drilling and blasting method is the main method of tunnel construction in China at present, but this construction method There are the following disadvantages: 1) a loose circle will be formed during the blasting vibration, which will affect the ...

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Problems solved by technology

Among them, the drilling and blasting method refers to the method of drilling blastholes and filling explosives in the face of the tunnel, and relying on explosives to break rocks to form a tunnel section. The drilling and blasting method is the main method of tunnel construction in China at present, but this construction method There are the following disadvantages: 1) a loose circle will be formed during the blasting vibration, which will affect the overall stability of the surrounding rock; 2) it is easy to cause over-excavation of the section; 3) a large amount of harmful gas and dust will be produced by the blasting, polluting the air; 4) vibration and noise may cause disturbance to the residents; 5) Waste slag causes waste of resources and occupies cultivated land

Yet so far, the basic excavation principle of various forms of rock boring machines has not changed, and all is to utilize very high pressure to break rock, thereby realizes excavation, and its obvious defect is: the first, because high pressure comes from support shoe, and The huge pressure on the rock on the boots and the face of the palm is likely to induce rock bursts and landslides; second, the excavation friction is very large, and the wear and tear on the cutter and the excavation machine is very high; third, due to the limitation of the excavation principle, the excavation speed is relatively slow. Slow, resulting in a very long construction period; Fourth, if the overall cutter head is damaged, the entire roadheader needs to exit the tunnel, replace the cutter head and then advance to the processing position, the operation is complicated and time-consuming

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