Reaming equipment for tunnel main hole roof cleaning

Abstract

The utility model belongs to the technical field of tunnel top lifting construction, and relates to a reaming device for tunnel main hole top lifting, which comprises an expansion rod body, and the expansion rod body comprises an upper body, a lower body and a connecting assembly; the upper body and the lower body are connected through a connecting assembly. Each of the upper body and the lower body comprises a group of expansion components; the expansion rod body expands outwards and acts on the surrounding rock around the hole wall in the mode that pressure is generated through physical expansion, the surrounding rock around the hole wall gradually generates cracks and is broken under the extrusion effect along with continuous expansion of the expansion rod body, and therefore loosening of the surrounding rock is achieved; vibration and shock waves generated by the expansion rod body are small, disturbance to surrounding rock around the tunnel is reduced, and the overall stability of the tunnel can be kept in the surrounding rock loosening process; by adjusting the expansion pressure of the expansion rod body, the loosening range and depth of the surrounding rock are conveniently and accurately controlled, and then the over-excavation or under-excavation phenomenon is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel roof - lifting construction, and particularly relates to a hole - expanding device for tunnel main - hole roof - lifting. Background Technique

[0002] During the construction of extra - long tunnels, in order to improve the construction progress, auxiliary adits are usually constructed on the side of the mountain body to open up a heading face for tunneling. When the auxiliary adit is constructed to the position intersecting with the main hole, roof - lifting construction is required to break through and open up the heading face of the main hole. At present, roof - lifting construction mainly relies on construction workers cooperating with excavators, supplemented by a small - scale drill - and - blast method. Specifically: Drilling and blasting holes are carried out at the end of the auxiliary adit by the drill - and - blast method to form a preliminary opening, and then the excavator is used to clean up the slag blocks generated by the blasting; Through continuous excavation operations, the heading face of the main hole is gradually enlarged and shaped.

[0003] In the prior art, there is a certain research on the surrounding - rock loosening method related to tunnel main - hole roof - lifting. Refer to the patent document with the application number 201910822156.0, which discloses a construction method for the intersection section of a tunnel cross - adit and a main hole and a bench blasting method, including: cut holes, slot - expanding holes, and perimeter holes; When the cut holes are blasted, a cavity is formed in the surrounding rock to create a good free face for the subsequent blasting of the blast holes. The cut holes adopt enhanced - throw blasting; The slot - expanding holes are arranged on both sides of the cut holes, the hole mouth is not less than 70 cm away from the cut holes, the hole bottom inclines towards the cut - hole direction, and enhanced - loose - blasting charging is adopted; The perimeter holes are arranged along the tunnel excavation contour line. The perimeter holes adopt a detonating cord to connect the cartridge charges in a series - interval charging structure, and the number of simultaneously detonated perimeter holes is 5 - 6.

[0004] It can be seen from this that a cavity is formed in the surrounding rock by the blasting of the cut holes to create a free face for the subsequent blasting of the blast holes, and methods such as enhanced - throw blasting and enhanced - loose - blasting charging are adopted to loosen the surrounding rock around the hole wall. However, during the process of using blasting charges to loosen the surrounding rock, strong shock waves and vibrations will be generated. The shock waves and vibrations not only directly act on the surrounding rock around the hole wall, but also cause strong disturbances to the surrounding rock in a wider area around the tunnel, and the overall stability of the tunnel is seriously affected, which is extremely likely to lead to safety accidents such as collapses. Content of the Utility Model

[0005] In order to solve the technical problem that using blasting charges to loosen the surrounding rock in the background technique will generate strong shock waves and vibrations and is extremely likely to lead to safety accidents such as collapses, the utility model provides a hole - expanding device for tunnel main - hole roof - lifting.

[0006] The reaming device for tunnel crown excavation of the utility model is provided with an expansion rod body. By means of physical expansion to generate pressure, it expands outward and acts on the surrounding rock around the hole wall. As the expansion rod body continuously expands, cracks gradually appear in the surrounding rock of the hole wall and are broken under the extrusion effect, thereby realizing the loosening of the surrounding rock. During this process, the vibration and shock wave generated by the expansion rod body are small, reducing the disturbance to the surrounding rock of the tunnel, which is beneficial to maintaining the overall stability of the tunnel during the process of loosening the surrounding rock, and further reducing the safety risk of crown excavation construction; in addition, by using the expansion rod body to loosen the surrounding rock, it is convenient to adjust the expansion pressure of the expansion rod body according to actual needs, so that the expansion rod body can expand within a predetermined range and depth, and then accurately control the range and depth of the surrounding rock loosening, reduce overexcavation or under-excavation phenomena, and improve the overall construction quality of the tunnel.

[0007] To solve the above technical problems, the utility model provides the following technical solutions:

[0008] A reaming device for tunnel crown excavation includes: an expansion rod body, and the expansion rod body includes an upper body, a lower body and a connection assembly; the upper body and the lower body are connected by the connection assembly; each of the upper body and the lower body includes a set of expansion assemblies, and the expansion assemblies are used to generate an expansion effect on the corresponding upper body or lower body.

[0009] In a specific feasible implementation, the expansion assembly includes an expansion shell, an expansion driving member and a fixing seat; the expansion shell is connected to the expansion driving member; the expansion driving member is connected to the fixing seat, and the expansion driving member is used to drive the corresponding expansion shell to expand outward; the fixing seat is connected to the connection assembly.

[0010] In a specific feasible implementation, the expansion driving member includes a driving unit, a hydraulic pipe and a fluid supply device; one end of the driving unit is connected to the expansion shell, and the other end is connected to the fixing seat; the output end of the hydraulic pipe is communicated with the driving unit, and the input end of the hydraulic pipe is communicated with the fluid supply device; the fluid supply device is used to supply fluid to the driving unit.

[0011] In a specific feasible implementation, the driving unit is a jack.

[0012] In a specific feasible implementation, the expansion assembly further includes a connection platform and a first fastener; one end of the connection platform is connected to the expansion shell, and the other end is connected to the expansion driving member; the first fastener passes through the connection platform and is connected to the expansion driving member.

[0013] In a specific feasible implementation, an installation groove for accommodating the expansion driving member is provided at one end of the connection platform close to the expansion driving member.

[0014] In a specific feasible embodiment, the connection component includes a mounting member and a second fastener; the mounting member is located between the fixed seat of the upper body and the fixed seat of the lower body, and the mounting member is used for connecting with an external device; the second fastener sequentially passes through the fixed seat of the upper body, the mounting member and the fixed seat of the lower body, and the second fastener is used for connecting the fixed seat of the upper body, the mounting member and the fixed seat of the lower body.

[0015] In a specific feasible embodiment, the second fastener is a bolt.

[0016] In a specific feasible embodiment, the connection component further includes a clip; the clip is connected with the mounting member, and one side of the clip is connected with the fixed seat of the upper body, and the other side is connected with the fixed seat of the lower body.

[0017] In a specific feasible embodiment, a control valve is connected to the hydraulic pipe.

[0018] In summary, the utility model has the following beneficial technical effects:

[0019] 1. For the hole expanding device for tunneling in the main tunnel of the utility model, the expansion rod body is provided. By the way of generating pressure through physical expansion, it expands outward and acts on the surrounding rock around the hole wall. As the expansion rod body continuously expands, the surrounding rock of the hole wall gradually generates cracks and is broken under the extrusion effect, so as to realize the loosening of the surrounding rock. In this process, the vibration and shock wave generated by the expansion rod body are small, reducing the disturbance to the surrounding rock around the tunnel, which is beneficial to maintaining the overall stability of the tunnel during the process of loosening the surrounding rock, and further reducing the safety risk of the tunneling construction; in addition, by using the expansion rod body to loosen the surrounding rock, it is convenient to adjust the expansion pressure of the expansion rod body according to the actual needs, so that the expansion rod body can expand within a predetermined range and depth, and then accurately control the range and depth of the surrounding rock loosening, reduce the phenomenon of overexcavation or under-excavation, and improve the overall construction quality of the tunnel.

[0020] 2. For the hole expanding device for tunneling in the main tunnel of the utility model, when the expansion shell expands outward, the second fastener provided can effectively limit the excessive expansion of the expansion shell, ensure the stability and safety of the expansion rod body during the process of loosening the surrounding rock, and prevent the damage of the expansion rod body caused by the excessive expansion of the expansion shell; during the process of the expansion shell restoring to its original state, the clip provided can ensure the stability of the expansion shell during the contraction process, and avoid the damage or performance degradation of the expansion rod body caused by rapid or uncontrolled contraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural schematic diagram of the hole expanding device for tunneling in the main tunnel of the utility model.

[0022] Figure 2It is the end sectional view of the hole expanding device for tunnel roof lifting in the main tunnel of the utility model.

[0023] Figure 3 It is the schematic diagram of the actual application scenario of the hole expanding device for tunnel roof lifting in the main tunnel of the utility model.

[0024] Explanation of reference numerals: 1. Expanding rod body; 11. Upper body; 12. Lower body; 13. Connecting component; 131. Mounting part; 132. Second fastener; 133. Clamping piece; 14. Expanding component; 141. Expanding shell; 142. Expanding driving part; 1421. Driving unit; 1422. Hydraulic pipe; 143. Fixed seat; 144. Connecting platform; 145. First fastener; 146. Mounting groove; 2. Roof lifting construction face. Specific embodiments

[0025] The technical solutions of the utility model will be further explained below in conjunction with the drawings and embodiments, but the utility model is not limited to the embodiments described below.

[0026] In the utility model, during the construction of extra-long tunnels, auxiliary tunnels are usually constructed on the side of the mountain body to open up a face for tunneling. When the auxiliary tunnel is constructed to the position intersecting with the main tunnel, roof lifting construction is required to break through and open up the face of the main tunnel. In the prior art, explosive charges are used to loosen the surrounding rock around the hole wall. However, during the process of using explosive charges to loosen the surrounding rock, strong shock waves and vibrations will be generated. The shock waves and vibrations not only directly act on the surrounding rock around the hole wall, but also cause strong disturbances to the surrounding rock of the wider tunnel perimeter. The overall stability of the tunnel is seriously affected, and safety accidents such as collapses are extremely likely to occur.

[0027] Refer to Figure 1 , a hole expanding device for tunnel roof lifting in the main tunnel, comprising: an expanding rod body 1, and the expanding rod body 1 includes an upper body 11, a lower body 12 and a connecting component 13. The upper body 11 and the lower body 12 are connected by the connecting component 13; each of the upper body 11 and the lower body 12 includes a set of expanding components 14, and the expanding components 14 are used to generate an expanding effect on the corresponding upper body 11 or lower body 12.

[0028] Refer to Figure 1 , the expanding component 14 includes an expanding shell 141, an expanding driving part 142 and a fixed seat 143. The expanding shell 141 is connected to the expanding driving part 142; the expanding driving part 142 is connected to the fixed seat 143, and the expanding driving part 142 is used to drive the corresponding expanding shell 141 to expand outwards; the fixed seat 143 is connected to the connecting component 13.

[0029] Refer to Figure 1 and Figure 2, the expansion driving member 142 includes a driving unit 1421, a hydraulic pipe 1422, and a fluid supply device. One end of the driving unit 1421 is connected to the expansion shell 141, and the other end is connected to the fixed seat 143; the output end of the hydraulic pipe 1422 is communicated with the driving unit 1421, and the input end of the hydraulic pipe 1422 is communicated with the fluid supply device; the fluid supply device is used to supply fluid to the driving unit 1421.

[0030] In the present utility model, the driving unit 1421 can be a hydraulic piston rod, a jack, etc. By setting the driving unit 1421, the expansion shell 141 is driven to expand, and such a setting method is acceptable.

[0031] In the present utility model, the operator adjusts the output pressure of the fluid supply device according to actual needs, and then adjusts the expansion pressure of the expansion assembly 14, so that the expansion assembly 14 can expand within a predetermined range and depth, thereby precisely controlling the range and depth of surrounding rock loosening, reducing overexcavation or under-excavation phenomena, and improving the overall construction quality of the tunnel.

[0032] Refer to Figure 1 , the connection assembly 13 includes a mounting member 131 and a second fastener 132. The mounting member 131 is located between the fixed seat 143 of the upper body 11 and the fixed seat 143 of the lower body 12. The mounting member 131 is used to connect to an external device, where the external device is used to install the hole-expanding device for the tunnel roof pick-up; in the present utility model, the external device is a drill; the second fastener 132 sequentially passes through the fixed seat 143 of the upper body 11, the mounting member 131, and the fixed seat 143 of the lower body 12, and the second fastener 132 is used to connect the fixed seat 143 of the upper body 11, the mounting member 131, and the fixed seat 143 of the lower body 12.

[0033] Specifically, the second fastener 132 can be a bolt, a pin, etc. By setting the second fastener 132, the stable connection of the fixed seat 143 of the upper body 11, the mounting member 131, and the fixed seat 143 of the lower body 12 is realized, and such a setting method is acceptable.

[0034] In the present utility model, when the expansion shell 141 expands outwards, the provided second fastener 132 can effectively limit the excessive expansion of the expansion shell 141, ensure the stability and safety of the expansion rod body 1 during the process of loosening the surrounding rock, and prevent the damage of the expansion rod body 1 caused by the excessive expansion of the expansion shell 141.

[0035] Embodiment 1:

[0036] Refer to Figure 1 and Figure 3 , for the hole-expanding device for the tunnel roof pick-up in this embodiment, the driving unit 1421 is a jack.

[0037] In this embodiment, the driving unit 1421 is set as a jack, which can stably provide driving force to uniformly expand the expansion shell 141, facilitating the precise control of the construction range and depth, achieving the expected effect of loosening the surrounding rock. At the same time, it is convenient to reduce the disturbance to the surrounding rock, improve the stability of the tunnel during the process of loosening the surrounding rock, and further improve the safety of the roof excavation operation at the roof excavation face 2 of the tunnel.

[0038] Embodiment 2:

[0039] Referring to Figure 1 and Figure 2 In this embodiment of the reaming device for roof excavation of the main tunnel, the expansion assembly 14 further includes a connecting platform 144 and a first fastener 145. One end of the connecting platform 144 is connected to the expansion shell 141, and the other end is connected to the expansion driving member 142; the first fastener 145 passes through the connecting platform 144 and is connected to the expansion driving member 142.

[0040] Specifically, the first fastener 145 can be a bolt, a pin, etc. By setting the first fastener 145, a stable connection between the connecting platform 144 and the expansion driving member 142 is achieved, and such setting methods are all acceptable.

[0041] In this embodiment, the provided connecting platform 144 and first fastener 145 ensure a stable connection between the expansion shell 141 and the expansion driving member 142, improving the overall stability of the reaming device for roof excavation of the main tunnel.

[0042] Embodiment 3:

[0043] Referring to Figure 1 In this embodiment of the reaming device for roof excavation of the main tunnel, the connecting platform 144 is provided with an installation groove 146 for accommodating the expansion driving member 142 at one end close to the expansion driving member 142.

[0044] In this embodiment, the provided installation groove 146 enables the expansion driving member 142 to be stably installed on the connecting platform 144, reducing the risk of loosening or falling off due to vibration.

[0045] Embodiment 4:

[0046] Referring to Figure 1 In this embodiment of the reaming device for roof excavation of the main tunnel, the second fastener 132 is a bolt.

[0047] In this embodiment, the second fastener 132 is set as a bolt, facilitating the stable connection between the fixing seat 143 of the upper body 11, the mounting member 131, and the fixing seat 143 of the lower body 12.

[0048] Embodiment 5:

[0049] Referring to Figure 1, in the hole expanding device for tunnel roof jacking in this embodiment, the connecting component 13 further includes a collet 133. The collet 133 is connected to the mounting member 131, and one side of the collet 133 is connected to the fixed seat 143 of the upper body 11, and the other side is connected to the fixed seat 143 of the lower body 12.

[0050] In this embodiment, during the process of the expansion shell 141 returning to its original state, the provided collet 133 can ensure that the expansion shell 141 remains stable during the contraction process, avoiding damage or performance degradation of the expansion rod body 1 caused by rapid or uncontrolled contraction.

[0051] Embodiment 6:

[0052] Refer to Figure 1 , in the hole expanding device for tunnel roof jacking in this embodiment, a control valve is connected to the hydraulic pipe 1422.

[0053] In this embodiment, connecting a control valve to the hydraulic pipe 1422 facilitates adjusting the flow state of the fluid in the hydraulic pipe 1422, thereby achieving precise control of the expansion driving member 142.

[0054] The working principle of a hole expanding device for tunnel roof jacking of the present utility model is as follows: During tunnel construction, align the expansion rod body 1 with the tunnel roof jacking working face 2 and adjust the expansion rod body 1 into the hole; supply fluid to the hydraulic pipe 1422 through a fluid supply device, the fluid acts on the driving unit 1421, and the driving unit 1421 drives the expansion shell 141 to expand outwards. As the expansion shell 141 continuously expands, the surrounding rock of the hole wall gradually generates cracks and is broken under the extrusion effect, thereby realizing the loosening of the surrounding rock around the hole wall.

[0055] The above are all preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A hole-expanding device for tunnel crown jacking, characterized in that, Comprising: An expansion rod body (1), the expansion rod body (1) includes an upper body (11), a lower body (12) and a connection component (13); The upper body (11) and the lower body (12) are connected by the connection component (13); The upper body (11) and the lower body (12) each include a set of expansion components (14), and the expansion components (14) are used to generate an expansion effect on the corresponding upper body (11) or lower body (12).

2. The hole enlarging device for tunnel roof lifting according to claim 1, characterized in that: The expansion component (14) includes an expansion shell (141), an expansion driving member (142) and a fixing seat (143); The expansion shell (141) is connected to the expansion driving member (142); The expansion driving member (142) is connected to the fixing seat (143), and the expansion driving member (142) is used to drive the corresponding expansion shell (141) to expand outwards; The fixing seat (143) is connected to the connection component (13).

3. The hole-expanding device for tunnel roof lifting according to claim 2, wherein: The expansion driving member (142) includes a driving unit (1421), a hydraulic pipe (1422) and a fluid supply device; One end of the driving unit (1421) is connected to the expansion shell (141), and the other end is connected to the fixing seat (143); The output end of the hydraulic pipe (1422) is communicated with the driving unit (1421), and the input end of the hydraulic pipe (1422) is communicated with the fluid supply device; The fluid supply device is used to supply fluid to the driving unit (1421).

4. The hole expanding device for tunnel invert jacking according to claim 3, characterized in that: The driving unit (1421) is a jack.

5. The hole expanding device for tunnel roof lifting according to claim 3, characterized in that: The expansion component (14) further includes a connection platform (144) and a first fastener (145); One end of the connection platform (144) is connected to the expansion shell (141), and the other end is connected to the expansion driving member (142); The first fastener (145) passes through the connection platform (144) and is connected to the expansion driving member (142).

6. The hole expanding device for tunnel roof lifting according to claim 5, characterized in that: An installation groove (146) for accommodating the expansion driving member (142) is formed at one end of the connection platform (144) close to the expansion driving member (142).

7. The hole expanding device for tunnel roof lifting according to claim 6, characterized in that: The connection component (13) includes an installation member (131) and a second fastener (132); The installation member (131) is located between the fixing seats (143) of the upper body (11) and the lower body (12), and the installation member (131) is used to connect to an external device; The second fastener (132) sequentially passes through the fixing seat (143) of the upper body (11), the installation member (131) and the fixing seat (143) of the lower body (12), and the second fastener (132) is used to connect the fixing seat (143) of the upper body (11), the installation member (131) and the fixing seat (143) of the lower body (12).

8. The hole expanding device for tunneling roof raising according to claim 7, characterized in that: The second fastener (132) is a bolt.

9. The hole expanding device for tunnel roof lifting according to claim 7, characterized in that: The connection component (13) further includes a clip (133); The clip (133) is connected to the installation member (131), and one side of the clip (133) is connected to the fixing seat (143) of the upper body (11), and the other side is connected to the fixing seat (143) of the lower body (12).

10. The hole expanding device for tunneling crown jacking according to claim 3, characterized in that: A control valve is connected to the hydraulic pipe (1422).

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