Device for removing high-strength rock blocks in deep foundation pit grooving hole

Abstract

The invention relates to a device for removing high-strength rock blocks in a foundation pit, and belongs to the field of urban subway station deep foundation pit construction and the field of subwayinterval shield tunnel construction. A cutting-grabbing-suction device for removing high-strength boulder in a deep foundation pit grooving hole is characterized by comprising a control system (1), acutting system (2), a grabbing system (3), a suction system (4), a gear system (5), a main protection cover (6) and the grooving hole (11); and a controller (102) controls the cutting system (2), thegrabbing system (3), the suction system (4) and the gear system (5) to achieve cutting, suction and grabbing of the boulder. The device has the beneficial effects of being capable of precisely cuttingthe boulder, accurately grabbing the boulder and sucking the boulder through large suction force, low in cost, reliable in performance and high in work efficiency.

Description

technical field [0001] The invention relates to a device for removing high-strength stones in foundation pits, which is suitable for cutting, grabbing and sucking devices for removing high-strength arcstones in grooved holes in foundation pits, and belongs to the field of deep foundation pit construction in urban subway stations and shield tunnels in subway intervals construction field. Background technique [0002] With the continuous expansion of the scale of urban subway construction, more and more technical difficulties are encountered, especially in the development of tunnels and underground projects in coastal and mountainous cities. Sequence distribution, high-pressure biogas distribution, etc., especially the existence of boulders, because the engineering survey cannot detect the precise position of each boulder, so it is impossible to judge the shape, size, depth, thickness, strength, etc. of the boulders, resulting in the subway The construction of grooves in the ...

AI Technical Summary

Problems solved by technology

However, due to the different environments in which the boulders occur, their shapes are difficult to describe, and their burial depths cannot be accurately located. Especially in coastal areas, the soft-hard composite strata are rich in groundwater, and the strata are mainly muddy soil and silt soil. The geological conditions are complex. Due to the existence of high-strength boulders, during the groove construction of the underground diaphragm wall of deep foundation pits, the force on the boulders in the stratum will be uneven, causing the boulders to slide away from their original positions, especially the boulders with the same diameter as the grooved hole. Due to its high strength and uneven thickness, ordinary grooving machines cannot crush high-strength boulders and grab boulders, making it difficult to grab soil and form troughs

If machines such as slot milling machines, rotary drills, and impact hammers are used instead, even if the combination of grasping and milling to form slots and milling machines to form slots are preferred, due to the high strength of the boulders, the maximum is 130MPa, and the distribution is disordered, and the impact Hammer and rotary drilling are more difficult to drill pilot holes, and the milling machine needs to replace all the drill bits at a certain depth, which greatly increases the cost of forming grooves in the underground diaphragm wall and seriously affects the progress of the project.

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