Support system of shield type TBM (Tunnel Boring Machine) for crushed collapse and extrusion deformation strata

Abstract

The utility model discloses a shield type TBM (Tunnel Boring Machine) supporting system for crushing collapse and extrusion deformation strata, which relates to the technical field of rock tunnel boring machine construction and comprises a pipe shed support at a front shield position, a pipe shed support at a middle shield position, a duct piece support at a shield tail position and an anchor cable support at a shield outlet position. The pipe shed support at the anterior shield position is that a pipe shed hole is reserved through the anterior shield, and a handheld drilling machine is used for installing a pipe shed to reinforce surrounding rock; the pipe shed support at the middle shield position is that a pipe shed hole is reserved through the middle shield, and a machine-mounted drilling machine is used for installing a pipe shed to reinforce surrounding rock; the segment support at the shield tail position is characterized in that segments are mounted by using a segment erector, and rapid-hardening cement mortar and pea stones are filled behind the walls of the segments; the anchor cable support out of the shield position is to install a pre-stressed anchor cable by using an anchor cable drilling machine; the device has the beneficial effects that the safety of the shield type TBM equipment and the tunnel structure under the crushed collapse and extrusion deformation stratum can be effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to rock tunnel boring machine (TBM) construction technical field, in particular to a kind of support system of broken collapse and extrusion deformation stratum shield type TBM. BACKGROUND

[0002] With the comprehensive outbreak of major engineering construction in water conservancy, transportation, energy and other fields, more and more deep buried super long tunnels are in urgent need to be built, and the geology to be crossed by these tunnels is more and more complex, and the harsh working environment poses new challenges to rock tunnel boring machine (TBM) construction technology. In the construction of broken strong collapse stratum, the cutter head is stuck, and the shield is trapped. In the construction of extrusion large deformation stratum, the main machine and the rear supporting system are trapped, the supporting structure is damaged, and the tunnel section is invaded. Compared with open TBM, the shield length of shield TBM is longer, and the difficulty of getting out of trouble is greater. Compared with steel arch, the pipe piece of supporting structure is heavier, and the difficulty of replacement is greater. Once the shield TBM is stuck or the supporting structure is damaged, it seriously affects the construction period and structural safety of the tunnel.

[0003] Therefore, it is a technical problem that needs to be solved urgently for those skilled in the art to develop an effective supporting system for broken collapse and extrusion deformation stratum shield TBM. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to solve the above problems and provide a kind of support system of broken collapse and extrusion deformation stratum shield TBM.

[0005] The utility model realizes the above-mentioned purposes by the following technical solutions:

[0006] A kind of support system of broken collapse and extrusion deformation stratum shield TBM, including the pipe shed supporting system of front shield position, the pipe shed supporting system of middle shield position, the pipe piece supporting system of shield tail position, the anchor cable supporting system of out shield position.

[0007] Preferably, the pipe shed supporting system of front shield position includes hand-held drill, reserved pipe shed hole and pipe shed arranged on front shield, drill hole and install pipe shed in at least 8 pipe shed holes reserved by hand-held drill on front shield, grouting and reinforcing surrounding rock, the pipe shed hole reserved by front shield is arranged in the gap between dome hinged oil cylinder, covers at least 120 ° range of tunnel dome.

[0008] Preferably, the pipe shed supporting system of middle shield position includes machine-mounted drill, reserved pipe shed hole and pipe shed arranged on middle shield, drill hole and install pipe shed in at least 5 pipe shed holes reserved by machine-mounted drill on middle shield, grouting and reinforcing surrounding rock of dome, the pipe shed hole reserved by middle shield is arranged in the gap between dome advancing oil cylinder, covers at least 64 ° range of tunnel dome.

[0009] Preferably, the pipe segment support system at the tail shield position comprises a pipe segment erector, pipe segments, a synchronous grouting pipe and a pea stone pump, the pipe segment erector is used to install the whole ring pipe segments, the synchronous grouting pipe arranged at the tail shield is used to inject quick-setting cement mortar to the back of the pipe segment wall to fill the gap between the pipe segments and the surrounding rock in the range of at least 90° at the bottom of the tunnel, and the pea stone pump is used to blow pea stones to the back of the pipe segment wall to fill the gap between the pipe segments and the surrounding rock in the range of at least 270° at the top of the tunnel.

[0010] Preferably, the anchor cable support system at the tail shield position comprises an anchor cable drill and pre-stressed anchor cables, the anchor cable drill is used to drill holes and install the pre-stressed anchor cables through at least 12 anchor cable holes reserved on the pipe segments at the top of the tunnel, covering a range of at least 130° at the vault.

[0011] Preferably, the number of pipe shed holes reserved on the front shield is 8, which are arranged in the gaps between the articulated oil cylinders at the vault, covering a range of 120° at the vault of the tunnel.

[0012] Preferably, the number of pipe shed holes reserved on the middle shield is 5, which are arranged in the gaps between the pushing oil cylinders at the vault, covering a range of 64° at the vault of the tunnel.

[0013] Preferably, the gap between the pipe segments and the surrounding rock in the range of 90° at the bottom of the tunnel is filled, and the gap between the pipe segments and the surrounding rock in the range of 270° at the top of the tunnel is filled.

[0014] Preferably, 4 anchor cable holes are reserved on each standard pipe segment, and the 3 standard blocks at the vault have a total of 12 anchor cable holes, covering a range of 130° at the vault of the tunnel.

[0015] Compared with the prior art, the utility model has the beneficial effects that in the broken and collapsed stratum, the pipe shed plays a full role in protection, preventing the TBM from being stuck due to the lack of support in the range of the prior art shield, in the extruded and deformed stratum, the passive strong support of the pipe segment and the active deformation control of the pre-stressed anchor cable are both played, preventing the extrusion and damage caused by the passive support of the pipe segment in the prior art. The utility model can effectively ensure the safety of the shield TBM equipment and the tunnel structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor under the premise of not paying.

[0017] Figure 1 The shield TBM different part support method schematic view provided by the utility model;

[0018] Figure 2 The front shield reserved pipe shed hole and reinforcing range schematic view provided by the utility model;

[0019] Figure 3 The middle shield reserved pipe shed hole and reinforcing range schematic view provided by the utility model;

[0020] Figure 4 The pipe piece wall back filling schematic view provided by the utility model;

[0021] Figure 5 The anchor cable hole position and prestressed anchor cable coverage range schematic view provided by the utility model;

[0022] Figure 6 The pipe piece standard block anchor cable hole and bean stone hole schematic view provided by the utility model.

[0023] The signs of the drawings are as follows:

[0024] 1, front shield; 2, front shield reserved pipe shed hole; 3, pipe shed; 4, articulated oil cylinder; 5, hand-held drill; 6, middle shield; 7, middle shield reserved pipe shed hole; 8, advancing oil cylinder; 9, shield tail; 10, synchronous grouting pipe; 11, pipe piece assembling machine; 12, anchor cable hole; 13, pipe piece; 14, machine-mounted drill; 15, prestressed anchor cable; 16, anchor cable drill; 17, bean stone; 18, quick-setting cement mortar; 19, bean stone hole. DETAILED DESCRIPTION

[0025] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model, in addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features, therefore, the features with "first", "second" and the like can explicitly or implicitly include one or more of the features, in the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0026] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element internal communication, for ordinary skilled in the art, the above-mentioned term can be understood by concrete case concrete meaning in the utility model.

[0027] The utility model will be further explained in connection with the drawings below:

[0028] As Figures 1-6 The supporting system of the broken collapse and extrusion deformation stratum shield type TBM shown in the figure, including the pipe roof support system of front shield 1 position, the pipe roof support system of middle shield 6 position, the pipe piece support system of shield tail 9 position, the anchor cable support system of out shield position.

[0029] The pipe roof support system of front shield 1 position is composed of hand-held drill 5, front shield 1 reserved pipe roof hole and pipe roof 3;Through the 8 pipe roof 3 holes reserved on front shield 1, utilize hand-held drill 5 drilling, and install pipe roof 3 and grouting reinforcement surrounding rock;Front shield 1 reserved pipe roof hole is arranged in the gap between arch top hinged oil cylinder 4, covers the range of 120 ° of tunnel arch top.

[0030] The pipe roof support system of middle shield 6 position is composed of machine-mounted drill 14, middle shield 6 reserved pipe roof hole and pipe roof 3;Through the 5 pipe roof 3 holes reserved on middle shield 6, utilize machine-mounted drill 14 drilling, and install pipe roof 3 and grouting reinforcement surrounding rock;Middle shield 6 reserved pipe roof hole is arranged in the gap between arch top advancing oil cylinder 8, covers the range of 64 ° of tunnel arch top.

[0031] The pipe piece support system of shield tail 9 position is composed of pipe piece assembling machine 11, pipe piece 13, synchronous grouting pipe 10 and bean stone 17 pump;Utilize pipe piece assembling machine 11 to install whole ring pipe piece 13;Utilize the synchronous grouting pipe 10 configured on shield tail 9 to inject rapid-setting cement mortar 18 to the back of pipe piece 13 wall, fill the gap between pipe piece 13 and surrounding rock in the range of 90 ° of tunnel bottom;Utilize bean stone 17 pump to blow fill bean stone 17 to the back of pipe piece 13 wall, fill the gap between pipe piece 13 and surrounding rock in the range of 270 ° of tunnel top.

[0032] The anchor cable support system of out shield position is composed of anchor cable drill 16, pre-stressed anchor cable 15, through the 12 anchor cable holes 12 reserved in tunnel top pipe piece 13, utilize anchor cable drill 16 drilling and install pre-stressed anchor cable 15, can cover the range of 130 ° of arch top.

[0033] Working principle: through the front shield 1 reserved pipe shed hole, using handheld drill 5 drilling and installing pipe shed 3, through pipe shed 3 grouting reinforcement surrounding rock; The front shield 1 is reserved 8 pipe shed 3 holes, arranged in the gap between the arch hinge oil cylinder 4, cover 120 ° of the tunnel vault range; Through the middle shield 6 reserved pipe shed hole, using airborne drill 14 drilling and installing pipe shed 3, through pipe shed 3 grouting to the vault surrounding rock supplementary reinforcement; The middle shield 6 is reserved 5 pipe shed 3 holes, arranged in the gap between the arch pushing oil cylinder 8, cover 64 ° of the tunnel vault range; Using pipe segment assembling machine 11 installs whole ring pipe segment 13; Through the shield tail 9 on the configuration synchronous grouting pipe 10 to pipe segment 13 wall back injection of rapid-setting cement mortar 18, fill the tunnel bottom 90 ° range pipe segment 13 and surrounding rock gap; Through the pipe segment 13 on the reserved bean stone 17 hole to pipe segment 13 wall back blowing fill bean stone 17, fill the tunnel top 270 ° range pipe segment 13 and surrounding rock gap; Through the arch pipe segment 13 on the reserved anchor cable hole 12, using anchor cable drill 16 drilling and installing prestressed anchor cable 15; Each standard pipe segment 13 on the reserved 4 anchor cable hole 12, arch 3 standard block 12 anchor cable hole 12, can cover 130 ° of the tunnel vault range.

[0034] The basic principle, main features and advantages of the utility model are shown and described above, and the skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. A support system for a shield TBM breaking through a caving and squeezing ground formation, characterised in that: The pipe shed support system includes a front shield (1) position, a middle shield (6) position, a shield tail (9) position, and an anchor cable support system at the exit of the shield.

2. The support system of claim 1, wherein: The pipe shed support system at the front shield (1) position includes a handheld drill (5), a reserved pipe shed hole on the front shield (1), and a pipe shed (3). The pipe shed (3) is drilled and installed in at least 8 pipe shed holes reserved on the front shield (1) by the handheld drill (5), and the surrounding rock is grouted and reinforced. The pipe shed holes reserved on the front shield (1) are arranged in the gap between the dome hinge oil cylinders (4), covering at least 120° of the tunnel dome.

3. The support system of claim 1, wherein: The pipe shed support system at the middle shield (6) position includes an on-board drill (14), a reserved pipe shed hole on the middle shield (6), and a pipe shed (3). The pipe shed (3) is drilled and installed in at least 5 pipe shed holes reserved on the middle shield (6) by the on-board drill (14), and the surrounding rock is grouted and reinforced. The pipe shed holes reserved on the middle shield (6) are arranged in the gap between the dome pushing oil cylinders (8), covering at least 64° of the tunnel dome.

4. The support system of claim 1, wherein: The pipe segment support system at the shield tail (9) position includes a pipe segment assembler (11), a pipe segment (13), a synchronous grouting pipe (10), and a bean stone (17) pump. The whole ring pipe segment (13) is installed by the pipe segment assembler (11), the synchronous grouting pipe (10) arranged on the shield tail (9) is used to inject quick-setting cement mortar (18) behind the pipe segment (13) wall, fill the gap between the pipe segment (13) and the surrounding rock in the tunnel bottom for at least 90°, and the bean stone (17) pump is used to blow fill bean stone (17) behind the pipe segment (13) wall, filling the gap between the pipe segment (13) and the surrounding rock in the tunnel top for at least 270°.

5. The support system of claim 1, wherein: The anchor cable support system at the exit of the shield includes an anchor cable drill (16) and a pre-stressed anchor cable (15). At least 12 anchor cable holes (12) are reserved on the tunnel top pipe segment (13), and the pre-stressed anchor cable (15) is drilled and installed by the anchor cable drill (16), covering at least 130° of the dome.

6. The support system of claim 2, wherein: The number of pipe shed (3) holes reserved on the front shield (1) is 8, arranged in the gap between the dome hinge oil cylinders (4), covering 120° of the tunnel dome.

7. The support system of claim 3, wherein: The number of pipe shed (3) holes reserved on the middle shield (6) is 5, arranged in the gap between the dome pushing oil cylinders (8), covering 64° of the tunnel dome.

8. The support system of claim 4, wherein: The gap between the pipe segment (13) and the surrounding rock in the tunnel bottom for 90° is filled, and the gap between the pipe segment (13) and the surrounding rock in the tunnel top for 270° is filled.

9. The support system of claim 5, wherein: There are 4 anchor cable holes (12) reserved on each standard pipe segment (13), and there are 12 anchor cable holes (12) on 3 standard blocks of the dome, covering 130° of the tunnel dome.

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