Telescopic large shield advanced grouting platform support

Abstract

The utility model provides a telescopic large shield advanced grouting platform support. The platform support comprises a longitudinal beam fixing support installed on a double-beam supporting frame of the middle shield erector, a telescopic longitudinal beam is installed in the longitudinal beam fixing support in a sliding mode, a plurality of storage grooves matched with the hidden type cross beams are formed in the two sides of the telescopic longitudinal beam, the hidden type cross beams are rotationally installed in the storage grooves, and the telescopic longitudinal beam is installed in the storage grooves in a sliding mode. A telescopic I-shaped beam is installed in each hidden cross beam in a sliding mode, and a bolt hole is formed in the end, away from the telescopic I-shaped beam, of each telescopic I-shaped beam. The temporary pre-grouting device can be hidden on a double-beam supporting frame of a shield erector, can be quickly built when in-hole pre-grouting is needed, can be quickly stored after being used, can meet the requirement that temporary pre-grouting is correspondingly needed in large shield construction under complex terrains, and greatly improves the construction efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of shield tunneling construction, specifically a telescopic large shield tunneling advance grouting platform support. Background Technology

[0002] During the tunneling process, large shield tunneling machines inevitably encounter complex and unstable geological conditions. However, the surface lacks the conditions for reinforcing unstable strata. Therefore, it is necessary to install pre-grouting equipment inside the shield machine, using pre-grouting holes on the shield body to grout and reinforce the strata above the cutterhead, achieving localized strata stabilization. Since there is no space on the shield body itself to install grouting equipment, current pre-grouting methods involve temporarily installing fixtures or platforms on the shield body to support the equipment. After pre-grouting is completed, the temporary grouting platform is dismantled, which wastes considerable time on the installation and dismantling of the fixtures or platforms, thus reducing the efficiency of shield tunneling construction. Summary of the Invention

[0003] To address the problems existing in the prior art, this utility model provides a retractable grouting platform support for large shield tunneling machines that can be hidden inside the shield body. This platform support can be hidden on the double beam support frame of the middle shield assembly machine using the shield body's own structure, without affecting the normal operation of the shield machine. When needed, it can be quickly pulled out and fixed to serve as a support for the grouting platform.

[0004] To achieve the aforementioned technical objectives, this utility model provides a retractable large shield tunneling machine pre-grouting platform support. The platform support includes longitudinal beam fixed supports mounted on the double-beam support frame of the central shield assembly machine and telescopic supports mounted on the longitudinal beam fixed supports. There are at least two longitudinal beam fixed supports. Each longitudinal beam fixed support's telescopic support includes a telescopic longitudinal beam, multiple concealed crossbeams distributed on the telescopic longitudinal beam, and a telescopic I-beam installed within each concealed crossbeam. The longitudinal beam fixed supports have telescopic cavities, and the telescopic longitudinal beams are slidably mounted within these cavities. In the retracted state, the telescopic longitudinal beams... The lower part is completely placed inside the fixed support of the longitudinal beam, and in the extended state, it is horizontally placed in front of the double beam support frame of the central shield assembly machine; multiple storage slots matching the hidden crossbeams are opened on both sides of the telescopic longitudinal beam, each hidden crossbeam is located in the storage slot, and one end of it is rotatably connected to the storage slot, and can rotate 90 degrees along the pivot to a state perpendicular to the telescopic longitudinal beam; the telescopic I-beam is slidably installed in the hidden crossbeam, and in the retracted state, it is completely placed inside the hidden crossbeam; bolt holes are opened at the end of the telescopic I-beam away from the telescopic I-beam, and the telescopic I-beams on two adjacent telescopic longitudinal beams are fixedly connected by bolts after being extended.

[0005] The preferred technical solution of this utility model is as follows: The platform support includes two longitudinal beam fixed supports symmetrically arranged on the double beam support frame of the middle shield assembly machine of the tunnel boring machine. Each longitudinal beam fixed support is located on the rear side of the double beam support frame of the middle shield assembly machine, and the opening of its telescopic cavity is located on the front support surface of the double beam support frame of the middle shield assembly machine.

[0006] The preferred technical solution of this utility model is as follows: a limiting slot is provided at the opening of the telescopic cavity of each longitudinal beam fixed support, and a first limiting block matching the limiting slot is provided at the tail end of each telescopic longitudinal beam. When the telescopic longitudinal beam is extended along the corresponding longitudinal beam fixed support, the limiting block on the telescopic longitudinal beam is engaged in the corresponding limiting slot.

[0007] The preferred technical solution of this utility model is as follows: the concealed crossbeam is provided with a telescopic cavity that matches the telescopic I-beam, and a second limiting block is provided at the opening of the telescopic cavity of the concealed crossbeam. The tail end of the telescopic I-beam is provided with a baffle that matches the second limiting block. The telescopic I-beam is limited by the second limiting block when it is extended.

[0008] The preferred technical solution of this utility model is as follows: multiple hidden crossbeams are evenly distributed on each telescopic longitudinal beam, each hidden crossbeam is rotatably installed at one end of the storage slot adjacent to the telescopic longitudinal beam, and a limiting plate is provided at the position of the rotating shaft installation.

[0009] The preferred technical solution of this utility model is that the longitudinal beam fixing support is a hollow support.

[0010] The telescopic longitudinal (main) beam of this invention can be hidden on the double-beam support frame of the shield assembly machine. The supporting crossbeam can retract into the telescopic longitudinal (main) beam. When pre-grouting is required in the tunnel, the longitudinal beam can be quickly extended from the middle shield, and then the crossbeam hidden in the longitudinal beam can be extended. Then, the I-beam hidden in the crossbeam can be pulled out and bolted to the I-beam extending from another longitudinal beam to form an integral load-bearing crossbeam. Then, a grouting platform is laid on the load-bearing crossbeam for convenient pre-grouting. Compared with the traditional tooling that temporarily installs load-bearing pre-grouting equipment on the shield body, the working efficiency of this invention is about 7 times higher, and it can be used multiple times without affecting regular construction. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the fully unfolded bracket of this utility model;

[0013] Figure 3 This is a schematic diagram of the connection between the telescopic longitudinal beam and the fixed support of the longitudinal beam in this utility model;

[0014] Figure 4This is a schematic diagram of the telescopic longitudinal beam structure of this utility model;

[0015] Figure 5 This is a schematic diagram of the connection between the concealed crossbeam and the telescopic I-beam of this utility model.

[0016] In the diagram: 1—Telescopic longitudinal beam; 100—First limiting block; 2—Hidden crossbeam; 200—Rotating shaft; 201—Second limiting block; 3—Telescopic I-beam; 300—Bolt hole; 4—Longitudinal beam fixing support; 400—Limiting slot; 5—Double beam support frame of Zhongdun assembly machine; 6—Storage slot; 600—Limiting plate. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figures 1 to 5 All accompanying drawings are simplified versions of embodiments and are intended solely for the purpose of clearly and concisely illustrating the embodiments of this utility model. The technical solutions shown in the drawings below are specific solutions of embodiments of this utility model and are not intended to limit the scope of the claimed utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be understood that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] The embodiment provides a retractable large shield tunneling machine pre-grouting platform support, such as Figures 1 to 5As shown, the platform support includes two longitudinal beam fixed supports 4 symmetrically arranged on the double beam support frame 5 of the shield machine's middle shield assembly machine, and telescopic supports installed on each longitudinal beam fixed support 4. Each longitudinal beam fixed support 4 is located on the rear side of the double beam support frame 5 of the middle shield machine assembly machine. The longitudinal beam fixed support 4 is a hollow support, and a telescopic cavity is provided inside the longitudinal beam fixed support 4. The opening of the telescopic cavity is located on the front support surface of the double beam support frame 5 of the middle shield machine assembly machine. The telescopic bracket on each longitudinal beam fixed support 4 includes a telescopic longitudinal beam 1, multiple concealed crossbeams 2 dispersed on the telescopic longitudinal beam 1, and a telescopic I-beam 3 installed in each concealed crossbeam 2. The telescopic longitudinal beam 1 is slidably installed in the telescopic cavity of the longitudinal beam fixed support 4. In the retracted state, the telescopic longitudinal beam 1 is completely placed in the longitudinal beam fixed support 4, and in the extended state, it is horizontally placed in front of the double beam support frame 5 of the shield assembly machine. A limiting slot 400 is provided at the opening of the telescopic cavity of each longitudinal beam fixed support 4, and a first limiting block 100 matching the limiting slot 400 is provided at the tail end of each telescopic longitudinal beam 1. When the telescopic longitudinal beam 1 is extended along the corresponding longitudinal beam fixed support 4, the limiting block 100 on the telescopic longitudinal beam 1 is inserted into the corresponding limiting slot 400.

[0020] The embodiment provides a retractable large shield tunneling machine pre-grouting platform support, such as Figures 1 to 4 As shown, multiple concealed crossbeams 2 are evenly distributed on each telescopic longitudinal beam 1. Multiple storage slots 6 matching the concealed crossbeams 2 are provided on both sides of the telescopic longitudinal beam 1. Each concealed crossbeam 2 is located within a storage slot 6, with one end rotatably connected to the storage slot 6. The rotatable connection of each concealed crossbeam 2 is located at the end of the storage slot 6 adjacent to the telescopic longitudinal beam 1. A limiting plate 600 is provided at the installation position of the rotating shaft 200. The concealed crossbeam 2 can be completely retracted into the storage slot 6 and can rotate 90 degrees along the rotating shaft 200 to a state perpendicular to the telescopic longitudinal beam 1; Figure 5 As shown, the concealed crossbeam 2 has a telescopic cavity that matches the telescopic I-beam 3, and a second limiting block 201 is provided at the opening of the telescopic cavity of the concealed crossbeam 2. The tail end of the telescopic I-beam 3 is provided with a baffle that matches the second limiting block 201. The telescopic I-beam 3 is slidably installed in the concealed crossbeam 2 and is completely placed in the concealed crossbeam 2 in the retracted state. In the extended state, it is limited by the second limiting block 201. A bolt hole 300 is provided at the end of the telescopic I-beam 3 away from the telescopic I-beam 3. The telescopic I-beams 3 on two adjacent telescopic longitudinal beams 1 are fixedly connected by bolts after being extended.

[0021] The installation process of this utility model is as follows: First, the concealed crossbeam 2 and the telescopic I-beam 3 are assembled in the telescopic longitudinal beam 1 at the factory. Then, the two longitudinal beam fixing supports 4 are symmetrically welded to the shield body. Finally, the assembled two telescopic longitudinal beams 1 are inserted into the welded longitudinal beam fixing supports 4. When pre-grouting is required, simply pull the two telescopic longitudinal beams 1 out of the longitudinal beam fixing supports 4 and position them. Then, rotate and open the concealed crossbeam 2 hidden in the telescopic longitudinal beam 1. Finally, pull out the telescopic I-beam 3 inside the concealed crossbeam 2 to the splicing position and connect it with bolts to form a stable structure. Then, lay a walkway on the surface to form a working platform, and transfer the grouting machine to the platform for operation. Limiting mechanisms are set in both the telescopic and rotating parts to prevent them from exceeding the limits and coming off during the stretching and rotation process.

[0022] During the normal construction phase of the tunnel boring machine (TBM), in order to prevent any impact on the TBM assembly machine and other structures, the concealed crossbeam 2 and the telescopic I-beam 3 are both retracted into the telescopic longitudinal beam 1. Then, the telescopic longitudinal beam 1 is retracted into the longitudinal beam fixed support 4. The entire device is hidden within the shield structure of the TBM and will not affect the normal use of the TBM.

[0023] This invention can be concealed within the structure of a large shield tunneling machine, enabling rapid assembly and disassembly. It can adapt to the technical requirements of temporary advanced grouting needed for large shield tunneling construction in complex terrain, and can be quickly disassembled after grouting without affecting the construction progress of conventional tunneling, thus significantly improving construction efficiency.

[0024] The above description is merely one embodiment of this utility model, and while it is quite specific and detailed, it should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A retractable large shield tunneling machine pre-grouting platform support, characterized in that: The platform support includes a longitudinal beam fixed support (4) installed on the double beam support frame (5) of the Zhongdun assembly machine and a telescopic support installed on the longitudinal beam fixed support (4). There are at least two longitudinal beam fixed supports (4). The telescopic support on each longitudinal beam fixed support (4) includes a telescopic longitudinal beam (1), multiple hidden crossbeams (2) distributed on the telescopic longitudinal beam (1), and a telescopic I-beam (3) installed in each hidden crossbeam (2). The longitudinal beam fixed support (4) is provided with a telescopic cavity. The telescopic longitudinal beam (1) is slidably installed in the telescopic cavity of the longitudinal beam fixed support (4). The telescopic longitudinal beam (1) is completely placed in the longitudinal beam fixed support (4) in the retracted state and is placed horizontally in the middle in the extended state. In front of the shield assembly machine double beam support frame (5); multiple storage slots (6) matching the hidden crossbeams (2) are provided on both sides of the telescopic longitudinal beam (1). Each hidden crossbeam (2) is located in the storage slot (6), and one end of it is rotatably connected to the storage slot (6) and can rotate 90 degrees along the pivot (200) to a state perpendicular to the telescopic longitudinal beam (1); the telescopic I-beam (3) is slidably installed in the hidden crossbeam (2) and is completely placed in the hidden crossbeam (2) in the retracted state. A bolt hole (300) is provided at the end of the telescopic I-beam (3) away from the telescopic I-beam (3). The telescopic I-beams (3) on two adjacent telescopic longitudinal beams (1) are fixedly connected by bolts after they are extended.

2. The retractable large shield tunneling machine pre-grouting platform support according to claim 1, characterized in that: The platform support includes two longitudinal beam fixed supports (4) symmetrically arranged on the double beam support frame (5) of the shield machine. Each longitudinal beam fixed support (4) is located on the rear side of the double beam support frame (5) of the shield machine, and the opening of its telescopic cavity is located on the front support surface of the double beam support frame (5).

3. A telescopic large shield tunnel pre-grouting platform support according to claim 1 or 2, characterized in that: A limiting slot (400) is provided at the opening of the telescopic cavity of each longitudinal beam fixed support (4). A first limiting block (100) matching the limiting slot (400) is provided at the tail end of each telescopic longitudinal beam (1). When the telescopic longitudinal beam (1) is extended along the corresponding longitudinal beam fixed support (4), the limiting block (100) on the telescopic longitudinal beam (1) is inserted into the corresponding limiting slot (400).

4. A retractable large shield tunneling machine pre-grouting platform support according to claim 1 or 2, characterized in that: The concealed crossbeam (2) is provided with a telescopic cavity that matches the telescopic I-beam (3), and a second limiting block (201) is provided at the opening of the telescopic cavity of the concealed crossbeam (2). The tail end of the telescopic I-beam (3) is provided with a baffle that matches the second limiting block (201), and is limited by the second limiting block (201) in the extended state.

5. A retractable large shield tunneling machine pre-grouting platform support according to claim 1 or 2, characterized in that: Multiple concealed crossbeams (2) are evenly distributed on each telescopic longitudinal beam (1). Each concealed crossbeam (2) is rotatably installed at one end of the storage slot (6) adjacent to the telescopic longitudinal beam (1), and a limiting plate (600) is provided at the position of the rotating shaft installation.

6. A telescopic large shield tunnel pre-grouting platform support according to claim 1 or 2, characterized in that: The longitudinal beam fixed support (4) is a hollow support.

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