Centrifugal mud discharging type air pressure pressurized drilling and cutting device for soft and hard strata

Abstract

The invention provides a centrifugal mud discharging type air pressure pressurized drilling and cutting device for soft and hard strata, and belongs to the technical field of underground engineering rock and soil drilling and cutting and underground engineering disaster prevention and mitigation. The centrifugal mud discharging type air pressure pressurized drilling and cutting device for soft andhard strata comprises a spiral-type centrifugal mud discharging system, a composite drilling and cutting system, a pressurized system, a sensing system, a pump water scouring system and a skeleton supporting system. Operating can be flexibly and quickly conducted during drilling and cutting construction; the composite drilling and cutting system is adopted to conduct drilling and cutting work, thus the uniformity of soil is guaranteed, smooth discharging of the soil is guaranteed, rapid drilling and cutting construction of the soft and hard strata is guaranteed, and the construction speed isincreased; the spiral-type centrifugal mud discharging system is adopted, and a plurality of spiral-type centrifugal mud discharging devices and a plurality of mud discharging pipes are connected, sothat high-speed discharging of rock debris during drilling and cutting construction of the soft and hard strata is guaranteed; and a high-pressure pipe and a wire pipe are embedded in a linear connecting arm, thus the member stiffness and safety are not affected, and materials are saved.

Description

technical field [0001] The invention belongs to the technical field of underground engineering rock and soil drilling, cutting and underground engineering disaster prevention and mitigation, and in particular relates to a centrifugal mud-discharging air pressure pressurized drilling and cutting device for soft and hard strata. Background technique [0002] The soft and hard stratum is a kind of heterogeneous stratum with complex and changeable geology. Strata and pile foundation construction cross soft and hard strata, deep foundation pit dewatering cross soft and hard stratum, ground stratification subsidence marks in subway operation area cross soft and hard stratum, deep rock and soil mass energy-gathering slits cross soft and hard stratum, etc. Construction in soft and hard strata of underground engineering is different from a single soft and hard stratum. Due to the large difference in stiffness between soft and hard strata, the drilling and cutting speed and the reacti...

AI Technical Summary

Problems solved by technology

Construction in soft and hard strata of underground engineering is different from a single soft and hard stratum. Due to the large difference in stiffness between soft and hard strata, the drilling and cutting speed and the reaction force of different soft and hard strata to drilling and cutting tools are not equal, resulting in soft and hard strata. The drillability of hard formations is different from single soft formations and hard formations, resulting in the drilling and cutting force of the construction surface is more difficult to control than in single soft formations and hard formations, so pile position deviations often occur during underground engineering construction Quality accidents such as loose concrete segregation, cracks, mud inclusions, surface settlement, underground pipeline damage, and surface buildings tilting or collapsing

[0003] Existing drilling devices for soft and hard formation mainly include super large diameter shield cutter head, shield scraper, shield machine tool, PDC bit, geophysical scour bit, etc. The cutting device is mainly rock-socketed pile air-pressure-controlled cutting, but shield drilling devices such as super-large-diameter shield cutterhead, shield scraper, shield machine tool, etc. are bulky and expensive. Drilling devices such as engineering survey drilling devices have small hole diameters, blade distribution angles and cutter distribution settings are unreasonable, and when rock-socketed piles are controlled by air pressure to cut soft and hard strata, the cutting force of the cutting surface cannot change in real time with the stratum. needs improvement

Therefore, the existing drilling and cutting devices for the construction of soft and hard formations are mainly single drilling devices and cutting devices, lacking a composite drilling and cutting device with both drilling and cutting functions.

[0004] Chinese patent CN106907158A is a super-large-diameter shield cutterhead system for soft and hard uneven formations, including large cutterheads, medium-sized cutterheads, small cutterheads, spokes, panels, hobs, cutters, leading knives, center knives, Stirring rods, reducers, hydraulic motors, power transmission devices, shields, and screw excavation devices, but the layout of the cutterhead system is a multi-layer cutterhead space staggered distribution, which is expensive. When the cutterhead encounters soft and hard strata for drilling construction However, due to the limitation of the overall structure of the front cutter head of the shield machine, the shield machine can only be driven into soft and hard areas by controlling various cutter heads, and it is difficult to effectively control the drilling and cutting forces of the corresponding cutting surfaces in diffe

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