Back-wall bean stone blowing and filling device of shield type TBM (tunnel boring machine)

Abstract

The utility model discloses a shield type TBM (tunnel boring machine) behind-wall beancurd-stone hydraulic reclamation device, which relates to the technical field of lining support structures for tunnel shield construction, and comprises a beancurd-stone shotcrete machine and a support structure, the support structure is composed of a plurality of segments, the segments are sequentially connected to form a ring shape, and the segments are arranged in the ring shape. Every two adjacent sets of pipe pieces are connected through a connecting mechanism. The backwall beancurd stone hydraulic reclamation device of the shield type TBM is reasonable and reliable in structure, through backwall beancurd stone hydraulic reclamation and grouting, the surrounding stratum can be effectively supported, stratum settlement and deformation are reduced, the stability and safety of a tunnel structure are protected, stable installation between adjacent pipe pieces is achieved through the arrangement of the pipe pieces, and the construction efficiency is improved. Due to the arrangement of the arc-shaped grooves and the auxiliary grooves, the contact area between the beancurd stones and the slurry and the duct piece can be increased, then the bonding force between the duct piece and surrounding rock can be enhanced, early-stage supporting force can be provided, and duct piece displacement or deformation caused by sedimentation or formation pressure change can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the lining support structure technical field of tunnel shield construction, specifically, relate to a wall behind the shield type TBM's bean stone filling device. BACKGROUND

[0002] In shield type TBM construction, the prefabrication and installation of segment lining are key steps. When segment lining is completed, there is usually a certain gap between its outer arc surface and surrounding rock. In order to reduce stratum settlement and ensure construction safety, it is necessary to inject slurry into surrounding rock as soon as possible through a guniting machine to fill the annular construction gap at the shield tail. This process not only effectively supports the surrounding rock and reduces the direct effect of stratum pressure on the segment, but also provides early stable support for the segment and reduces the risk of stratum settlement.

[0003] Among them, the installation stability between the segments directly relates to the overall safety of the tunnel. The traditional segment assembly mainly relies on manual alignment and simple mechanical assistance (such as bolt or pin connection). Due to low positioning accuracy, misalignment, loosening or loose connection of segments may occur during assembly. Such problems can cause stress concentration, increase the risk of segment cracking and tunnel lining deformation, and affect tunnel construction efficiency and quality.

[0004] In view of the problems in the related art, no effective solution has been proposed so far. UTILITY MODEL CONTENT

[0005] In view of the problems in the related art, the utility model proposes a wall behind the shield type TBM's bean stone filling device to overcome the above technical problems existing in the prior art.

[0006] Therefore, the utility model adopts the following specific technical solutions:

[0007] A wall behind the shield type TBM's bean stone filling device, comprising a bean stone guniting machine and a support structure, wherein the support structure is composed of a plurality of segments, and the plurality of segments are connected in sequence and form an annular shape, and the two adjacent groups of segments are connected through a connecting mechanism.

[0008] Further, in order to realize the stability of the adjacent segments, and the setting of the arc-shaped groove and the auxiliary groove can increase the contact area between the pebble and the segment, thereby enhancing the bonding force between the segment and the surrounding rock, providing early support force, effectively reducing the displacement or deformation of the segment caused by settlement or formation pressure change, the cross section of the segment is arc-shaped structure, and the inner wall of the segment is provided with a grouting hole, and the grouting hole is provided with a grouting plug; the both ends of the segment are provided with mounting grooves, the cross section of the mounting groove is T-shaped structure, and the inner wall of the mounting groove is provided with a jack.

[0009] Further, in order to realize the stability of the adjacent segments, and the setting of the arc-shaped groove and the auxiliary groove can increase the contact area between the pebble and the segment, thereby enhancing the bonding force between the segment and the surrounding rock, providing early support force, effectively reducing the displacement or deformation of the segment caused by settlement or formation pressure change, the cross section of the segment is arc-shaped structure, and the inner wall of the segment is provided with a grouting hole, and the grouting hole is provided with a grouting plug; the both ends of the segment are provided with mounting grooves, the cross section of the mounting groove is T-shaped structure, and the inner wall of the mounting groove is provided with a jack.

[0010] Further, in order to realize the stability of the adjacent segments, and the setting of the arc-shaped groove and the auxiliary groove can increase the contact area between the pebble and the segment, thereby enhancing the bonding force between the segment and the surrounding rock, providing early support force, effectively reducing the displacement or deformation of the segment caused by settlement or formation pressure change, the cross section of the segment is arc-shaped structure, and the inner wall of the segment is provided with a grouting hole, and the grouting hole is provided with a grouting plug; the both ends of the segment are provided with mounting grooves, the cross section of the mounting groove is T-shaped structure, and the inner wall of the mounting groove is provided with a jack.

[0011] The utility model discloses the beneficial effect that:

[0012] 1, the utility model discloses a reasonable and reliable structure, the wall behind pebble filling device of shield type TBM passes through the wall behind pebble filling and grouting, can effectively support the surrounding formation, reduce formation settlement and deformation, protect the stability and safety of tunnel structure.

[0013] 2, through setting segment, thereby realized the stability of the adjacent segments, and the setting of the arc-shaped groove and the auxiliary groove can increase the contact area between the pebble and the segment, and then can enhance the bonding force between the segment and the surrounding rock, provide early support force, effectively reduce the displacement or deformation of the segment caused by settlement or formation pressure change.

[0014] 3、By setting the connecting mechanism, the stability of the connection between adjacent segments is realized, the accuracy of the installation between the segments is ensured, the rotation of the plug is driven by the driving rod, and the accurate alignment of the segments during the installation process can be ensured, the installation efficiency is improved, and the risk of ground subsidence or segment damage caused by installation errors is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0016] Figure 1 is a structural schematic view of a shield TBM wall back pea stone filling device according to an embodiment of the present application;

[0017] Figure 2 is a structural schematic view of a support structure in a shield TBM wall back pea stone filling device according to an embodiment of the present application;

[0018] Figure 3 is a structural schematic view of a segment in a shield TBM wall back pea stone filling device according to an embodiment of the present application;

[0019] Figure 4 is a structural schematic view of a segment in a shield TBM wall back pea stone filling device according to an embodiment of the present application;

[0020] Figure 5 is a sectional view of a connecting mechanism in a shield TBM wall back pea stone filling device according to an embodiment of the present application.

[0021] In the drawings:

[0022] 1, pea stone guniting machine; 2, support structure; 3, segment; 301, grouting hole; 302, grouting plug; 303, mounting groove; 304, jack; 305, arc-shaped groove; 306, auxiliary groove; 307, fixed column; 308, fixed plate; 4, connecting mechanism; 401, connecting column; 402, chamber; 403, driving rod; 404, bevel gear one; 405, driven rod; 4051, thread; 406, bevel gear two; 407, plug; 4071, threaded hole. DETAILED DESCRIPTION

[0023] To further illustrate the embodiments, the utility model provides has the drawing, these drawings are the utility model disclosure content a part, its mainly used for explaining the embodiment, and can cooperate the related description of the specification to explain the operation principle of the embodiment, cooperate with reference to these contents, the person skilled in the art should be able to understand other possible implementation ways and the advantages of the utility model, the components in the drawing are not drawn in proportion, and similar component symbols are usually used to represent similar components.

[0024] According to the embodiment of the utility model, a wall behind bean stone filling device of shield type TBM is provided.

[0025] The utility model will be further illustrated by combining with the specific embodiment and the drawing, as Figures 1-5 The wall behind bean stone filling device of shield type TBM according to the embodiment of the utility model, as shown in the drawing, comprises bean stone shotcreting machine 1 and supporting structure 2, wherein the supporting structure is formed by a plurality of segments 3, and the plurality of segments 3 are sequentially connected and form an annular shape, and the adjacent two groups of segments 3 are connected through connecting mechanism 4.

[0026] In addition, it should be noted that the bean stone shotcreting machine 1 is a device used for the wall behind bean stone filling operation in shield tunnel construction, and its main function is to mix bean stone (usually granular material with a certain particle size) and slurry, and then spray it into the gap between the segment and the surrounding rock, to form a supporting layer to improve the stability of the tunnel structure.

[0027] The bean stone shotcreting machine 1 mainly consists of the following key parts:

[0028] Hopper: used for storing aggregates such as bean stone, usually designed with large capacity to ensure continuous feeding, while avoiding blockage or overflow.

[0029] Conveying system: may include conveyor belt, rotor or other mechanical devices, used for uniform and continuous transmission of bean stone in the hopper to the spraying system. The speed and direction of the conveyor belt can be adjusted to adapt to different construction needs.

[0030] Spraying system: including nozzle, pump station, etc., responsible for spraying bean stone through high-pressure gas or mechanical force to the target surface. The design of the nozzle will consider factors such as spray angle, spray distance and spray volume to ensure construction effect.

[0031] Hydraulic system: in the bean gravel spraying machine, the hydraulic system is usually used to drive the conveying system and the spraying system, providing necessary power and stability.

[0032] Electronic control system: used to control the operation of the entire device, including the speed of the conveyor belt, the pressure and flow of the spraying system, etc., to realize automation and precise control.

[0033] Other auxiliary components: such as screening system (for screening qualified beans), safety valve, motor, etc. These components together ensure the normal operation and safety performance of the equipment.

[0034] The working principle of the bean stone guniting machine 1 mainly based on the following steps:

[0035] Hopper storage: The aggregate such as bean stone is stored in the hopper, waiting for transportation.

[0036] Transportation and screening: The bean stone in the hopper is uniformly and continuously conveyed to the screening system through the conveying system (such as conveyor belt or rotor). The screening system screens out the qualified bean stone and sends it to the pump station.

[0037] Hydraulic delivery: The pump station delivers the screened bean stone to the jetting system through the hydraulic system.

[0038] Jetting construction: Under the control of the electric control system, the jetting system sprays the bean stone to the target surface through high-pressure gas or mechanical force. During the spraying process, the electric control system can adjust the spraying pressure, flow and nozzle action as needed to achieve precise construction effect.

[0039] In one embodiment, for the above-mentioned segment 3, the cross section of the segment 3 is arc-shaped structure, and the inner wall of the segment 3 is provided with a grouting hole 301, and the inside of the grouting hole 301 is provided with a grouting plug 302; both ends of the segment 3 are provided with a mounting groove 303, the cross section of the mounting groove 303 is T-shaped structure, and the inner wall of the mounting groove 303 is provided with a insertion hole 304; the top and bottom of the outer side of the segment 3 are provided with an arc-shaped groove 305, and a plurality of auxiliary grooves 306 are provided on the outer side of the segment 3 and between the two groups of arc-shaped grooves 305, the inner wall of the auxiliary groove 306 is provided with a fixed column 307, one end of the fixed column 307 is provided with a fixed plate 308, and the cross section diameter of the fixed column 307 is smaller than the cross section diameter of the fixed plate 308, thereby realizing the stable installation between adjacent segments 3, and under the setting of the arc-shaped groove 305 and the auxiliary groove 306, the contact area between the bean stone and the slurry and the segment 3 can be increased, thereby the bonding force between the segment and the surrounding rock can be enhanced, the early support force can be provided, and the displacement or deformation of the segment caused by settlement or change of ground pressure can be effectively reduced.

[0040] In one embodiment, for the above connecting mechanism 4, the connecting mechanism 4 comprises a connecting column 401 arranged between two adjacent groups of segments 3, a cavity 402 is formed in the middle of the connecting column 401, a driving rod 403 is arranged inside the cavity 402 and penetrates through the side wall of one end of the connecting column 401, a bevel gear one 404 is arranged at one end of the driving rod 403, a driven rod 405 is arranged on both sides of the inside of the cavity 402 and penetrates through, a bevel gear two 406 is arranged on the outer side of one end of the driven rod 405, and in addition, the bevel gear one 404 and the bevel gear two 406 are engaged in specific applications; the plug block 407 matched with the jack 304 is embedded in the middle of both sides of the connecting column 401; the outer side of the end of the driven rod 405 away from the bevel gear two 406 is provided with a thread 4051; the cross section of the plug block 407 is a square structure, and the side wall of the plug block 407 is provided with a threaded hole 4071 matched with the thread 4051, so that the stability of the connection between the adjacent segments 3 is realized, the accuracy after installation between the segments 3 is ensured, the accurate alignment of the segments 3 in the installation process is ensured through the rotation of the plug block 407 driven by the driving rod 403, the installation efficiency is improved, and the risk of ground subsidence or segment damage caused by installation error is reduced.

[0041] In addition, it needs to be supplemented that the connecting mechanism 4 can be used for fixed installation between the segments 3, after the stable installation between the segments 3, the connecting mechanism 4 can be taken out from between the segments 3, and the pre-prepared slurry or other filling materials can be poured into the installation groove 303 in the segment 3, and the construction of the whole supporting structure is completed after solidification; the detachable design can effectively save the use cost of the connecting mechanism 4, because one connecting mechanism 4 can be repeatedly used for the installation of multiple groups of segments 3.

[0042] The working principle of the connecting mechanism 4 is that when two groups of segments 3 are spliced, the connecting column 401 is inserted into the installation groove 303 in the segment 3, then when inserted to the appropriate position, the bevel gear one 404 is rotated by rotating the driving rod 403, then the driven rod 405 is rotated under the action of the engagement of the bevel gear one 404 and the bevel gear two 406, then the plug block 407 is inserted into the jack 304 under the cooperation of the threaded hole 4071 and the thread 4051, and the splicing and fixing between the two groups of segments 3 are realized.

[0043] In order to facilitate the understanding of the above technical scheme of the utility model, the working principle or operation mode of the utility model in the actual process is described in detail below.

[0044] In actual application, firstly, the pipe segments 3 are spliced through the connecting mechanism 4, so that the annular supporting structure 2 is formed between the pipe segments 3, then the grouting plug 302 is removed from the pipe segment 3, the pisolitic rock is blown and filled into the gap between the pipe segment 3 and the surrounding rock through the grouting hole 301 by the pisolitic rock grouting machine 1, after the pisolitic rock is blown and filled, the slurry is continuously injected through the grouting hole. The slurry will penetrate and wrap the pisolitic rock, fill the remaining gap, and solidify within a certain time. The grouting layer after solidification will form a solid supporting layer, which will bear the ground pressure and deformation together with the pipe segment 3.

[0045] In summary, by means of the above technical scheme of the utility model, the utility model has reasonable and reliable structure, the wall-behind pisolitic rock blowing and filling device of the shield type TBM can effectively support the surrounding stratum, reduce stratum settlement and deformation, and protect the stability and safety of the tunnel structure. By arranging the pipe segment 3, the stable installation between adjacent pipe segments 3 is realized, and under the arrangement of the arc-shaped groove 305 and the auxiliary groove 306, the contact area between the pisolitic rock and the slurry and the pipe segment 3 can be increased, thereby the adhesion between the pipe segment and the surrounding rock can be enhanced, early support force can be provided, and the displacement or deformation of the pipe segment caused by settlement or stratum pressure change can be effectively reduced. By arranging the connecting mechanism 4, the stability during the connection between adjacent pipe segments 3 is realized, the accuracy after the installation between the pipe segments 3 is ensured, the accurate alignment of the pipe segment 3 during the installation process is ensured by driving the rotation of the plug 407 through the driving rod 403, not only the installation efficiency is improved, but also the risk of stratum settlement or pipe segment damage caused by installation error is reduced.

[0046] In the utility model, unless otherwise expressly specified and limited, the terms "mounting", "arrangement", "connection", "fixing", "screw connection" and the like should be understood broadly, for example, can be fixed connection, can be detachable connection, or integrated; can be mechanical connection, can be electrical connection; can be directly connected, can be indirectly connected through an intermediate medium, can be the communication between two elements or the interaction relationship between two elements, unless otherwise expressly limited, the above-mentioned terms in the utility model can be understood according to the specific meaning of the above-mentioned terms in the utility model by the person skilled in the art according to the specific situation.

[0047] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A wall back pea gravel placement device for a shielded TBM, characterized by, The utility model provides a kind of bean granule stone grouting machine (1) and supporting structure (2), wherein, The supporting structure is formed by a plurality of pipe pieces (3), and the plurality of pipe pieces (3) are sequentially connected and formed into a ring shape, and two adjacent groups of pipe pieces (3) are connected by a connecting mechanism (4).

2. A wall-behind-pick shield TBM pea stone placement apparatus according to claim 1, wherein, The pipe piece (3) is arc-shaped in cross section, and the inner wall of the pipe piece (3) is provided with a grouting hole (301), and the grouting hole (301) is provided with a grouting plug (302) inside. Both ends of the pipe piece (3) are provided with mounting grooves (303), which are T-shaped in cross section, and the inner wall of the mounting groove (303) is provided with a jack (304).

3. A wall-behind-pick shield TBM pea stone placement apparatus according to claim 2, wherein, The top and bottom of the outer side of the pipe piece (3) are provided with arc grooves (305), and the outer side of the pipe piece (3) between the two groups of arc grooves (305) is provided with a plurality of auxiliary grooves (306), and the inner wall of the auxiliary groove (306) is provided with a fixed column (307), and one end of the fixed column (307) is provided with a fixed plate (308).

4. A shield TBM wall post pea stone filling device according to claim 2, characterized in that, The connecting mechanism (4) includes a connecting column (401) disposed between two adjacent groups of pipe pieces (3), a cavity (402) is formed in the middle of the connecting column (401), a drive rod (403) is disposed inside the cavity (402) and penetrates one end of the side wall of the connecting column (401), one end of the drive rod (403) is provided with a bevel gear (404), and two sides of the cavity (402) are provided with a driven rod (405) penetratingly disposed inside, one end of the driven rod (405) is provided with a bevel gear (406) outside. The connecting column (401) is provided with an insertion block (407) in the middle of both sides, which cooperates with the jack (304).

5. A shield TBM wall post pea stone filling device according to claim 4, wherein, The end of the driven rod (405) away from the bevel gear (406) is provided with a thread (4051) outside.

6. A shield TBM wall post pea gravel filling device according to claim 5, characterized in that, The cross section of the insertion block (407) is square, and the sidewall of the insertion block (407) is provided with a threaded hole (4071) matched with the thread (4051).

7. A shield TBM wall post pea stone filling device according to claim 3, characterized in that, The cross-sectional diameter of the fixed column (307) is smaller than the cross-sectional diameter of the fixed plate (308).

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