Shield tunneling construction device for underpassing adjacent station building

Abstract

The application discloses a shield tunnel underpassing adjacent station building construction device, which comprises an arc-shaped protection beam and a drilling device, an arc-shaped plate is embedded and fixed in the arc-shaped protection beam, the arc-shaped plate is fixedly connected with a sleeve pipe in a staggered mode, a grouting pipe is fixedly connected with one side of the arc-shaped protection beam, and the grouting pipe is communicated with the sleeve pipe; a butt joint pipe is arranged at the lower end of each sleeve pipe, an inclined pipe is arranged at the lower end of the butt joint sleeve, and the inclined pipe is obliquely installed through the drilling device. The grouting pipe is used for grouting into the arc-shaped protection beam, cement slurry fills a reserved cavity in the arc-shaped protection beam, and then is discharged through the sleeve pipe. The inclined pipe is inserted into the bottom of the sleeve pipe in a staggered mode of each arc-shaped protection beam, the inclined pipe supports in an oblique downward direction, the subsequent shield tunnel through line is avoided, support is provided above the shield tunnel through line at the bottom of the existing station, ground subsidence caused by disturbance of the existing station bottom due to shield construction is avoided, and influence on the safe operation of the existing station is reduced.

Description

Technical Field

[0001] This invention relates to the field of tunnel underpass construction technology, and in particular to a construction device for shield tunnels passing under adjacent station buildings. Background Technology

[0002] Currently, subway underpass projects mainly employ two construction methods: reserving interfaces for future station structures and creating interfaces by demolishing existing station side walls. However, with economic development and population growth, urban transportation planning will also be adjusted and changed, leading to the construction of new planned subway lines. These new subway lines do not reserve interfaces for existing stations, and the existing stations are tunneled under shield tunnels. Due to the large tunnel diameter and untimely grouting of the shield, the bearing capacity of the existing station's foundation can be damaged, easily causing settlement of the existing station. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a shield tunnel construction device for passing under adjacent station buildings, thereby solving the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A shield tunnel construction device for passing under an adjacent station building includes an arc-shaped protective beam and a drilling device. An arc-shaped plate is pre-embedded and fixed inside the arc-shaped protective beam. The arc-shaped plate is fixedly connected to a sleeve by misalignment. A grouting pipe is fixedly connected to one side of the arc-shaped protective beam. The grouting pipe is connected to the sleeve.

[0006] Each sleeve has a connecting pipe at the lower end, and the lower end of the connecting sleeve is equipped with an inclined pipe, which is installed at an angle through a drilling device.

[0007] Preferably, the inclined tube comprises segmented tubes connected by threads in sequence, and the lower end of the lowest segmented tube is provided with a cutting blade, and the segmented tubes are uniformly provided with grouting holes.

[0008] Preferably, the drilling device includes a vehicle body, a vertical plate fixedly connected to one side of the vehicle body, a rotary motor fixedly connected to one side of the vertical plate, a support plate fixedly connected to the main shaft of the rotary motor, a sliding block slidably connected in the sliding groove, the sliding block being driven to slide by a driving device, a mounting plate fixedly connected to the sliding block, a turntable rotatably connected to the mounting plate, the turntable being driven to rotate by a power device, a through hole provided on the turntable, a segmented tube slidingly passing through the through hole, at least three side plates fixedly connected in a ring array on the upper side of the turntable, a locking rod threadedly connected to each side plate, and at least three insertion holes arrayed on the upper end of each segmented tube, with each insertion hole corresponding to a locking rod.

[0009] Preferably, the connecting pipe is a metal bellows, with threaded interfaces at both ends. One end of the connecting pipe is threadedly connected to the sleeve, and the other end is threadedly connected to the upper end of the inclined pipe.

[0010] Preferably, a pouring pipe is fixedly connected to the bottom of the vehicle body, one end of the pouring pipe is connected to a concrete conveying truck, and the other end of the pouring pipe is fixedly connected to a diversion pipe.

[0011] Preferably, the surface of the arc-shaped plate is provided with reinforcing ribs.

[0012] Preferably, the arc-shaped protective beam is provided with anchor holes at intervals, and anchor rods are provided in the anchor holes.

[0013] The advantages of this invention are as follows: The shield tunnel construction device provided by this invention injects grout into the arc-shaped protective beam through a grouting pipe. After the cement grout fills the reserved cavity in the arc-shaped protective beam, it is discharged through the sleeve. An inclined pipe is inserted at the bottom of the sleeve at each misaligned arc-shaped protective beam. The inclined pipe supports downwards and avoids the subsequent shield tunnel penetration line. It provides support above the shield tunnel penetration line at the bottom of the existing station, avoiding the disturbance of the bottom of the existing station caused by shield construction, which would lead to foundation settlement and affect the safe operation of the existing station. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the invention located beneath an existing station;

[0015] Figure 2 This is a schematic diagram of the basic structure of the present invention;

[0016] Figure 3 yes Figure 1 A schematic diagram of the structure after removing the curved guard beam;

[0017] Figure 4 yes Figure 3 Enlarged view of section E in the image;

[0018] Figure 5 It is a structural diagram of existing stations, newly built stations, and newly built shield tunnels. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] like Figure 1-5 As shown, the present invention provides a shield tunnel construction device for passing under an adjacent station building, including an arc-shaped protective beam 1 and a drilling device. The arc-shaped protective beam 1 is prefabricated by casting internal steel bars on the outside. An arc-shaped plate 11 is pre-embedded and fixed inside the arc-shaped protective beam 1. The arc-shaped plate 11 is tied together with the internal steel bars of the arc-shaped protective beam 1. The arc-shaped plate 11 is fixedly connected to the sleeve 12 in a staggered manner. A grouting pipe 13 is fixedly connected to one side of the arc-shaped protective beam 1. The grouting pipe 13 is connected to the sleeve 12.

[0021] Each sleeve 12 is provided with a connecting pipe 14 at its lower end, and an inclined pipe 3 is provided at the lower end of the connecting sleeve. The inclined pipe 3 is installed at an angle through a drilling device. The inclined pipe 3 includes segmented pipes 31 connected by threads in sequence, and a cutting blade 32 is provided at the lower end of the lowest segmented pipe 31. Grouting holes are evenly provided in the segmented pipes 31. Grouting is injected into the arc-shaped protective beam 1 through the grouting pipe 13. After the cement grout fills the reserved cavity in the arc-shaped protective beam 1, it is discharged through the sleeve 12. An inclined pipe 3 is inserted into the bottom of the sleeve 12 at each arc-shaped protective beam 1 where they are misaligned. The inclined pipe 3 supports downwards at an angle to avoid the subsequent shield tunnel penetration line 30. It supports the bottom of the existing station 10 above the shield tunnel penetration line 30 to avoid the ground settlement caused by the shield construction, which would affect the safe operation of the existing station 10.

[0022] The drilling device includes a vehicle body 2. A vertical plate 21 is fixedly connected to one side of the vehicle body 2. A rotary motor 22 is fixedly connected to one side of the vertical plate 21. The main shaft of the rotary motor 22 is fixedly connected to a support plate 23. The support plate 23 is provided with a slide groove 24. A slider 25 is slidably connected in the slide groove 24. The slider 25 is driven to slide by a drive device, such as a motor screw or hydraulic cylinder. The slider 25 is fixedly connected to a mounting plate 26. The mounting plate 26 is rotatably connected to a turntable 27. The turntable 27 is driven to rotate by a power device, such as a pulley mechanism. The turntable 27 is provided with a through hole. The segmented tube 31 slides through the through hole. At least three side plates 28 are fixedly connected in a ring array on the upper side of the turntable 27. Each side plate 28 is threadedly connected to a locking rod 29. At least three insertion holes 291 are arranged in an array on the upper end of each segmented tube 31. The insertion holes 291 are set one-to-one with the locking rods 29.

[0023] Infrared rays are set on the mounting plate 26, and the direction of the infrared rays is parallel to the inclined tube 3. The infrared rays are used for positioning, which facilitates the coaxial installation of the inclined tube 3 and the sleeve 12. The drilling device rotates the support plate 23 to a suitable position through the rotary motor 22. The segmented tube 31 of the initial section is inserted into the through hole of the turntable 27. Each locking rod 29 rotates through the thread action and is inserted into the insertion hole 291 to form a fixation. While the turntable 27 rotates, the slider 25 descends in the slide groove 24 to drill the segmented tube 31 of the initial section into the soil at an angle.

[0024] After the slider 25 descends to the bottom in the slide groove 24, the reverse locking rod 29 allows the turntable 27 to separate from the segmented tube 31 of the initial section. The next segmented tube 31 is inserted into the turntable 27 and threadedly fastened to the previous section. The slider 25 rises to the upper end of the slide groove 24, and the locking rod 29 is fixed again. Thus, the inclined tube 3 is buried in a narrow space in a segmented manner.

[0025] After all the segmented pipes 31 are buried, the mounting plate 26 is positioned in the gap between the uppermost segmented pipe 31 and the sleeve 12, and the vehicle body 2 moves to the next installation position. The uppermost segmented pipe 31 and the sleeve 12 are connected by the connecting pipe 14.

[0026] After the inclined tube 3 is installed on one side, the rotary motor 22 rotates the support plate 23 to the other side for subsequent installation. The inclined tubes 3 on both sides and the upper arc-shaped protective beam 1 form an integral whole and are grouted to facilitate the formation of stable support above the shield tunnel excavated later, thus avoiding any impact on the construction safety of the existing station 10 during shield tunneling.

[0027] The connecting pipe 14 is a metal bellows. Threaded interfaces are provided at both ends of the connecting pipe 14. One end of the connecting pipe 14 is threadedly connected to the sleeve 12, and the other end of the connecting pipe 14 is threadedly connected to the upper end of the inclined pipe 3. When the drilling direction of the inclined pipe 3 deviates, the connecting pipe 14 adapts by bending itself, so that the inclined pipe 3 can be connected to the grouting pipe 13 through the connecting pipe 14.

[0028] Furthermore, a pouring pipe 4 is fixedly connected to the bottom of the vehicle body 2. One end of the pouring pipe 4 is connected to a concrete delivery truck, and the other end of the pouring pipe 4 is fixedly connected to a diversion pipe 41 to fill the narrow passage pre-excavated using the mining method.

[0029] Specifically, the surface of the arc-shaped plate 11 is provided with reinforcing ribs 111, and the arc-shaped guard beam 1 is provided with anchor holes at intervals, with anchor rods 112 installed in the anchor holes.

[0030] The shield tunneling construction process based on the present invention includes the following steps:

[0031] ① The side wall of the newly built station 20 is chiseled open, and the tunnel 40 is excavated under the existing station 10 using the mining method. As the tunnel 40 is deepened, prefabricated arc-shaped protective beams 1 are supported at intervals and anchored.

[0032] ② Draw the centerline at the bottom of the passage 40. The vehicle body 2 drives into the passage 40 with reference to the centerline and grouts the arc-shaped guard beam 1, grouting pipe 13 and inclined pipe 3 one by one from the inside out. At the same time, the pouring pipe 4 and the diversion pipe 41 backfill the passage 40 with concrete.

[0033] ③ Tunnel boring machine advances during construction.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction device for a shield tunnel passing under an adjacent station building, comprising an arc-shaped protective beam (1) and a drilling device, characterized in that: An arc-shaped plate (11) is pre-embedded and fixed inside the arc-shaped guard beam (1). The arc-shaped plate (11) is fixedly connected to the sleeve (12) by misalignment. A grouting pipe (13) is fixedly connected to one side of the arc-shaped guard beam (1). The grouting pipe (13) is connected to the sleeve (12). Each sleeve (12) is provided with a connecting pipe (14) at the lower end, and an inclined pipe (3) is provided at the lower end of the connecting sleeve. The inclined pipe (3) is installed at an angle through a drilling device. The inclined tube (3) includes segmented tubes (31) connected by threads in sequence, and the lower end of the lowest segmented tube (31) is provided with a cutting blade (32), and the segmented tubes (31) are evenly provided with grouting holes; The drilling device includes a vehicle body (2), a vertical plate (21) is fixedly connected to one side of the vehicle body (2), a rotary motor (22) is fixedly connected to one side of the vertical plate (21), the main shaft of the rotary motor (22) is fixedly connected to a support plate (23), the support plate (23) is provided with a slide groove (24), a slider (25) is slidably connected in the slide groove (24), the slider (25) is driven to slide by a drive device, the slider (25) is fixedly connected to a mounting plate (26), the mounting plate (26) is rotatably connected to a turntable (27), the turntable (27) is driven to rotate by a power device, the turntable (27) is provided with a through hole, the segmented tube (31) slides through the through hole, at least three side plates (28) are fixedly connected in a ring array on the upper side of the turntable (27), each side plate (28) is threadedly connected to a locking rod (29), at least three insertion holes (291) are arranged in an array on the upper end of each segmented tube (31), and the insertion holes (291) are set one-to-one with the locking rods (29).

2. The shield tunnel construction device for passing under an adjacent station building according to claim 1, characterized in that: The connecting pipe (14) is a metal bellows. Threaded interfaces are provided at both ends of the connecting pipe (14). One end of the connecting pipe (14) is threadedly connected to the sleeve (12), and the other end of the connecting pipe (14) is threadedly connected to the upper end of the inclined pipe (3).

3. The shield tunnel construction device for passing under an adjacent station building according to claim 1, characterized in that: The bottom of the vehicle body (2) is fixedly connected to the pouring pipe (4), one end of the pouring pipe (4) is connected to the concrete conveying vehicle, and the other end of the pouring pipe (4) is fixedly connected to the diversion pipe (41).

4. The shield tunnel construction device for passing under an adjacent station building according to claim 1, characterized in that: The surface of the arc-shaped plate (11) is provided with reinforcing ribs (111).

5. The shield tunnel construction device for passing under an adjacent station building according to claim 1, characterized in that: The arc-shaped protective beam (1) is provided with anchor holes at intervals, and anchor rods (112) are provided in the anchor holes.

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