Deep hole expanding drill for removing obstacles in underground diaphragm wall subway shield area

Abstract

The utility model relates to a deep hole expanding drill for removing obstacles in an underground diaphragm wall subway shield area. The deep hole expanding drill solves the problem that an existing expanding drill cannot meet the requirement for obstacle removing operation in the underground diaphragm wall subway shield area. The device comprises an outer sleeve and a central tube which are mutually nested, the lower end of the outer sleeve is open, the central tube can be inserted into the outer sleeve in a downward telescopic mode, a plurality of sets of fin plates are evenly arranged on the periphery of the outer side of the outer sleeve, each set of fin plates comprises an upper fin plate and a lower fin plate, and the upper end of each upper fin plate is hinged to the upper end of the outer sleeve; the lower end of the upper fin plate is hinged to the upper end of the lower fin plate; and reaming teeth are uniformly arranged on the side surfaces, facing the rotating direction, of the upper fin plate and the lower fin plate. According to the utility model, the outer sleeve and the central pipe which are nested and telescopic are adopted to control the straightening, folding and unfolding of the upper fin plate and the lower fin plate, so that the chambering operation for removing obstacles in the underground diaphragm wall subway shield area is completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling construction, in particular to a deep hole expansion drill used for clearing obstacles in underground continuous wall subway shield areas. Background Art

[0002] During the construction process, some construction deep underground requires drilling operations. For example, the underground continuous wall subway shield area clearance. With the acceleration of urbanization, more and more subway lines are put into construction. The subway platforms built in the early stage did not take into account the subsequent subway tunnel planning, or the subsequent subway construction planning was readjusted. The underground continuous wall of the existing subway station has become an obstacle to the construction of new subway lines. The depth of this underground continuous wall is generally more than 20 meters. It is necessary to clear the area where the underground continuous wall blocks the subway shield route. The traditional method is usually to excavate a deep foundation pit on the side of the obstacle clearance point, and then backfill after clearing the obstacle clearance point. There is also a steel casing buried on the side of the obstacle clearance point to reduce the excavation volume and construction area, but this type of construction method is difficult and has higher construction requirements.

[0003] The applicant has developed a construction method for clearing obstacles in underground continuous wall subway shield areas, which first opens a borehole from the top surface of the underground continuous wall to the obstacle clearing position, and then uses a hole reaming drill to enter the bottom of the borehole at the borehole to expand the wall at the obstacle clearing position, and uses a method of multiple hole reaming at different positions until the obstacle clearing work is completed. This type of deep underground hole reaming operation has high requirements for hole reaming drills, and traditional hole reaming drills are difficult to meet the construction requirements. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the existing hole expansion drill cannot meet the needs of wall obstacle clearance operations in underground continuous wall subway shield areas, and to provide a deep hole expansion drill for clearing obstacles in underground continuous wall subway shield areas, which is applied to the hole expansion and obstacle clearance operations of deep underground drilling.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a deep hole reaming drill for clearing obstacles in underground continuous wall subway shield areas, comprising an outer sleeve and a center tube nested with each other, the lower end of the outer sleeve is open, and the center tube can be inserted into the outer sleeve telescopically downward, a plurality of groups of fin plates are evenly arranged around the outer side of the outer sleeve, each group of fin plates includes an upper fin plate and a lower fin plate, the upper end of the upper fin plate is hinged to the upper end of the outer sleeve, the lower end of the upper fin plate is hinged to the upper end of the lower fin plate, and the lower end of the lower fin plate is hinged to the lower end of the center tube; the sides of the upper fin plate and the lower fin plate facing the rotation direction are evenly provided with reaming teeth.

[0006] When the device is in the initial state of the hole reaming drill, the upper end of the outer sleeve is fixed to the drill pipe, the center pipe is extended to the maximum position, and the upper fin plate and the lower fin plate are kept in a vertical state, and can be lowered to the bottom along the borehole. When the lower end of the center pipe reaches the bottom of the borehole, the drill pipe continues to be lowered, and the outer sleeve and the center pipe are relatively contracted, and the upper fin plate and the lower fin plate are folded and expanded outward. The drill pipe rotates at the same time, driving the upper fin plate and the lower fin plate to rotate, and the hole is expanded. The drill pipe is gradually lowered, and the folding angle of the upper fin plate and the lower fin plate becomes larger and larger, and the outward expansion amplitude gradually increases, until the center pipe and the outer sleeve are contracted to the maximum position, and the maximum hole expansion size of the device is reached.

[0007] Preferably, the inner wall of the outer sleeve and the outer wall of the central tube are clearance-matched, and the extension and contraction of the outer sleeve and the central tube are gravity-driven. When the device is in use, when reaching the bottom of the borehole, the gravity of the drill rod continuing to sink is used to squeeze the outer sleeve and the central tube to perform the hole expansion operation.

[0008] As another preferred solution, the inner wall of the outer sleeve and the outer wall of the central tube are sealed piston-type matched, and the outer sleeve and the central tube are hydraulically driven to extend and retract. The outer sleeve and the central tube are hydraulically controlled to extend and retract, and the central tube and the outer sleeve can be controlled to extend and retract at any height of the drilling hole to perform hole expansion operations.

[0009] Preferably, the outer sleeve is a hydraulic cylinder and the center tube is a piston.

[0010] Preferably, the sum of the lengths of the outer sleeve and the center tube is greater than the sum of the lengths of the upper fin plate and the lower fin plate.

[0011] Preferably, the outer side surface of the lower fin plate is evenly provided with reaming teeth.

[0012] Preferably, the outer side surface of the upper fin plate is evenly provided with reaming teeth.

[0013] Preferably, a fixed disk is provided at the bottom end of the central tube, a rotating disk is provided below the fixed disk, and a wear-resistant block is provided on the bottom surface of the rotating disk.

[0014] Preferably, the rotating disk is pressed onto the axis of the bottom surface of the central tube by bolts, and the fixed disk is pressed and fixed by the rotating disk.

[0015] Preferably, the upper end of the outer casing is provided with a joint connected to the drill pipe.

[0016] The utility model adopts nested telescopic outer sleeve and central tube to control the straightening and folding and unfolding of upper fin plates and lower fin plates, thereby completing the hole expansion operation of wall obstacle clearing in the underground continuous wall subway shield area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 The utility model is a schematic diagram of the structure of a hole expansion drill.

[0019] Figure 2 The utility model is a cross-sectional view of the hole expansion drill structure.

[0020] Figure 3 The utility model is a bottom view of a hole expansion drill structure.

[0021] In the figure: 1, outer sleeve, 2, center tube, 3, upper fin plate, 4, lower fin plate, 5, reaming teeth, 6, fixed plate, 7, rotating plate, 8, wear-resistant block, 9, bolts, 10, joint. DETAILED DESCRIPTION

[0022] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings.

[0023] Embodiment: A deep hole reaming drill for clearing obstacles in underground continuous wall subway shield area, such as Figure 1-3 As shown. The device comprises an outer sleeve 1 and a central tube 2 which are nested with each other. The upper end of the outer sleeve 1 is provided with a joint 10 connected to the drill pipe. The lower end of the outer sleeve 1 is open, and the central tube 2 can be inserted into the outer sleeve 1 to be telescopic downward. The inner wall of the outer sleeve 1 and the outer wall of the central tube 2 are gap-matched, and the telescopic movement of the outer sleeve and the central tube is driven by gravity. The inner wall of the outer sleeve 1 and the outer wall of the central tube 2 can also be matched in a sealed piston manner and driven by hydraulic pressure, with the outer sleeve being a hydraulic cylinder and the central tube being a piston.

[0024] Three groups of fin plates are evenly arranged around the outer circumference of the outer sleeve, and each group of fin plates includes an upper fin plate 3 and a lower fin plate 4. The upper end of the upper fin plate 3 is hinged to the upper end of the outer sleeve 1, the lower end of the upper fin plate 3 is hinged to the upper end of the lower fin plate 4, and the lower end of the lower fin plate 4 is hinged to the lower end of the center tube 2; the sides of the upper fin plate and the lower fin plate facing the rotation direction are evenly arranged with reaming teeth 5. The sum of the lengths of the outer sleeve 1 and the center tube 2 is greater than the sum of the lengths of the upper fin plate 3 and the lower fin plate 4. In this example, the outer side surface of the lower fin plate 4 also substantially has reaming teeth 5.

[0025] like Figure 2 , 3 As shown, a fixed disk 6 is provided at the bottom end of the central tube 2, a rotating disk 7 is provided below the fixed disk, and a wear-resistant block 8 is provided on the bottom surface of the rotating disk. The rotating disk 7 is pressed at the axis center of the bottom surface of the central tube 2 by bolts 9, and the fixed disk 6 is pressed and fixed by the rotating disk.

[0026] In the initial state of the reamer, the upper end of the outer sleeve is fixed to the drill pipe, the center pipe is extended to the maximum position, and the upper and lower fins are kept in a vertical state, and can be lowered to the bottom along the borehole. When the lower end of the center pipe reaches the bottom of the borehole, the drill pipe continues to be lowered, and the outer sleeve and the center pipe are relatively contracted, and the upper and lower fins are folded and expanded outward. The drill pipe rotates at the same time, driving the upper and lower fins to rotate to expand the hole. The drill pipe is gradually lowered, and the folding angle of the upper and lower fins becomes larger and larger, and the outward expansion amplitude gradually increases until the center pipe and the outer sleeve are contracted to the maximum position, reaching the maximum expandable hole size of the device.

Claims

1. A deep hole expansion drill for clearing obstacles in underground continuous wall subway shield area, characterized by: It comprises an outer sleeve and a central tube which are nested with each other, the lower end of the outer sleeve is open, and the central tube can be inserted into the outer sleeve in a telescopic manner downward, a plurality of groups of fin plates are evenly arranged around the outer side of the outer sleeve, each group of fin plates comprises an upper fin plate and a lower fin plate, the upper end of the upper fin plate is hinged to the upper end of the outer sleeve, the lower end of the upper fin plate is hinged to the upper end of the lower fin plate, and the lower end of the lower fin plate is hinged to the lower end of the central tube; the sides of the upper fin plate and the lower fin plate facing the rotation direction are evenly arranged with reaming teeth; the outer side surface of the lower fin plate is evenly arranged with reaming teeth; the bottom end of the central tube is arranged with a fixed disk, a rotating disk is arranged below the fixed disk, and the bottom surface of the rotating disk is arranged with a wear-resistant block.

2. A deep hole reaming drill for clearing obstacles in underground continuous wall subway shield area according to claim 1, characterized in that: The inner wall of the outer sleeve and the outer wall of the central tube are clearance-matched, and the expansion and contraction of the outer sleeve and the central tube are driven by gravity.

3. The deep hole reaming drill for clearing obstacles in underground continuous wall subway shield area according to claim 1, characterized in that: The inner wall of the outer sleeve and the outer wall of the central tube are matched in a sealed piston manner, and the extension and retraction of the outer sleeve and the central tube are hydraulically driven.

4. A deep hole reamer for clearing obstacles in underground continuous wall subway shield area according to claim 3, characterized in that: The outer sleeve is a hydraulic cylinder, and the central tube is a piston.

5. The deep hole reaming drill for clearing obstacles in underground continuous wall subway shield area according to claim 1, characterized in that: The sum of the lengths of the outer sleeve and the center tube is greater than the sum of the lengths of the upper fin plate and the lower fin plate.

6. A deep hole reamer for clearing obstacles in underground continuous wall subway shield area according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The outer side surface of the upper fin plate is evenly provided with hole expansion teeth.

7. A deep hole reamer for clearing obstacles in underground continuous wall subway shield area according to claim 6, characterized in that: The rotating disk is pressed on the axis center of the bottom surface of the central tube by bolts, and the fixed disk is pressed and fixed by the rotating disk.

8. A deep hole reamer for clearing obstacles in underground continuous wall subway shield area according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The upper end of the outer sleeve is provided with a joint connected to the drill rod.

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