Hydraulic tunnel profile steel supporting device and construction method

Abstract

The invention provides a hydraulic tunnel profile steel supporting device which comprises a plurality of supporting units which are arranged in the length direction of a tunnel. Each supporting unit comprises a base, a supporting rod and a supporting fork, the bases of every two adjacent supporting units are detachably connected, the supporting rods are arranged on the bases and extend in the direction away from the bases, and the supporting forks are arranged at the ends, away from the bases, of the supporting rods. The invention further provides a construction method of the hydraulic tunnel profile steel supporting device. The installation precision of the profile steel can be improved, and installation is easy and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of underground engineering construction, and particularly relates to a steel support device and construction method for a hydraulic tunnel.

Background Art

[0002] As an important support structure in underground engineering, the initial support of the tunnel widely uses steel sections in underground engineering. However, during the initial support process, due to measurement errors or operational mistakes, there are deviations between the installation positions of the steel sections and the designed positions (such as horizontal and vertical offsets), resulting in a reduction in the support effect and even causing tunnel deformation or collapse. At the same time, if the steel frames are not installed vertically according to the center line strictly, it will also affect the tunnel clearance and the stress effect, especially in complex geological conditions, it is more likely to cause structural instability, seriously affecting the stability and safety of the tunnel. These problems not only increase the construction cost and duration but also pose a serious threat to the safety and durability of the project.

[0003] Currently, the solutions to the problem of the installation accuracy of tunnel steel sections mainly include measures such as integrating positioning and verticality calibration functions. However, these methods are usually complex, costly, and often cannot be popularized on a large scale. The cross-sectional size of the tunnel is small, and large equipment cannot be used for construction. During tunnel support, manual erection construction is still adopted, making the construction difficult. Especially during the construction process, due to construction technology and equipment limitations, it is difficult to effectively control the installation accuracy of the steel sections, resulting in the problem that the initial support is unqualified and difficult to be completely solved.

[0004] Therefore, there is an urgent need to provide a simple and efficient device and construction method for improving the installation accuracy of steel sections to solve the problems existing in the prior art.

Summary of the Invention

[0005] The present invention aims to at least solve one of the above-mentioned technical problems, and provides a steel support device and construction method for a hydraulic tunnel, which can not only improve the installation accuracy of the steel sections but also be simply installed.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A steel support device for a hydraulic tunnel includes a plurality of support units arranged along the length direction of the tunnel; each support unit includes a base, a support rod, and a support fork. The bases of two adjacent support units are connected. The support rod is arranged on the base and extends away from the base, and the support fork is arranged at the end of the support rod away from the base.

[0008] Furthermore, the base includes a base rod and a connecting rod, the number of the base rods is two and they are arranged in parallel, and the connecting rod connects the two base rods; the base rods of the two adjacent support units are detachably connected and the total length of the two connected base rods can be adjusted; a support rod is installed on one base rod.

[0009] Furthermore, the total length of the connecting rod is adjustable and can be split into two sections; the length of a single base rod is adjustable.

[0010] Furthermore, the base rod and the connecting rod are both made of detachable telescopic steel pipes.

[0011] Furthermore, the detachable telescopic steel tube includes a slot rod, a locking piece and an insertion rod, the slot rod having a through slot extending through the length direction; the locking piece includes an elastic pressure block, a limiting flange, a sleeve ring, an eccentric pressure roller and an operating rod, the end of the slot rod is provided with a mounting opening, the elastic pressure block is clamped at the mounting opening, and the bottom of the elastic pressure block extends toward the through slot, and the top of the elastic pressure block extends toward the outside of the slot rod; the limiting flange is located at the opposite ends of the elastic pressure block and is connected to the elastic pressure block; the sleeve ring is sleeved on the end of the slot rod and covers the limiting flange therein, and a avoidance hole is provided on the sleeve ring for the elastic pressure block to extend outward; the eccentric pressure roller is rotatably provided on the sleeve ring and corresponds to the elastic pressure block; the operating rod is connected to the eccentric pressure roller; the insertion rod is adapted to the inner diameter of the through slot and is provided with a guide groove corresponding to the elastic pressure block, and the circumferential surface of the elastic pressure block contacts the inner wall of the guide groove.

[0012] Furthermore, the length of the support rod is adjustable, and the support fork is detachably connected to the support rod; the width of the support fork is adjustable.

[0013] Furthermore, the support rod adopts the above-mentioned detachable telescopic steel tube, and the locking parts are provided at the opposite ends of the slot rod. The detachable telescopic steel tube also includes an extension rod, an elastic plug block and a locking block. One of the extension rods is connected to an operating rod of the locking part and the extension rod extends toward the middle of the slot rod; the elastic plug block is provided at one end of the extension rod away from the operating rod; the locking block is provided in the middle of the slot rod, and the locking block is provided with a socket adapted to the elastic plug block, and the socket extends from the side of the locking block to the outside of the locking block.

[0014] Furthermore, there are three support units, the support rod of the support unit located in the middle is perpendicular to the base, and the support rods of the support units located on both sides are inclined relative to the base and form an inverted "eight" shape with each other.

[0015] A construction method for a steel support device for a hydraulic tunnel, applicable to the above-mentioned steel support device for a hydraulic tunnel, includes the following steps:

[0016] S1 Determine the installation position of the steel support device for the hydraulic tunnel at the initial support construction site of the tunnel, and carry out necessary site cleaning and preparation work;

[0017] S2 Initially install the components of the steel support device for the hydraulic tunnel at the construction site in sequence;

[0018] S3 Adjust the lengths of the base rod and the connecting rod to ensure that the device can accurately adjust the offsets in the horizontal and vertical directions; by adjusting the length of the connecting rod, increase or decrease the distance between the two base rods of the same base to adapt to the installation requirements of different spacings between two steel sections, and ensure that the steel support device for the hydraulic tunnel can accurately adjust the offset in the horizontal direction;

[0019] S4 Place the steel section on the support fork, and adjust the length of the support rod according to the actual situation to make the distance and contact area between the support fork and the steel section meet the predetermined requirements, and ensure that the steel support device for the hydraulic tunnel can accurately adjust the offset in the vertical direction;

[0020] S5 Monitor the position deviation and perpendicularity of the steel section according to the real-time measurement data, and reduce the position deviation and perpendicularity deviation by adjusting the length and angle of the support rod.

[0021] Furthermore, during the initial construction process of the steel support device for the hydraulic tunnel, continuously supervise and adjust the position deviation and perpendicularity of the steel section to ensure the stability and safety of the initial support.

[0022] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0023] 1. Effectively control the installation accuracy problem of the steel section: By adjusting the support device to accurately control the offsets in the horizontal and vertical directions, it can effectively reduce the problem of reduced support effect caused by the deviation between the installation position of the steel section and the designed position, and improve the stability and safety of the initial support.

[0024] 2. Reduce construction risks: The use of the device can reduce the risks brought by poor initial support effect during the construction process, reduce the probability of accidental events occurring during the project construction, and improve the safety of the construction site.

[0025] 3. Simple and efficient construction method: The construction method is simple and easy to implement, without complex operation processes and a large amount of manpower and material resources, and can quickly achieve the accuracy control of the steel section installation, improving the construction efficiency.

[0026] 4. Reduce maintenance costs: By effectively controlling the installation accuracy of the profiled steel, the service life of the initial support can be extended, the frequency and cost of maintenance and repair can be reduced, and the operation cost of the underground project can be lowered.

[0027] 5. Environmental protection and energy conservation: Optimize the energy consumption and material use during the construction process, reduce the environmental impact of the initial support construction, and meet the requirements of sustainable development.

Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the profiled steel support device for the hydraulic tunnel in the present invention.

[0029] Figure 2 is Figure 1 The enlarged view at A in

[0030] Figure 3 It is a schematic structural diagram of the base rod.

[0031] Figure 4 It is a schematic structural diagram of the support rod.

[0032] Figure 5 is Figure 4 The enlarged view at B in

[0033] In the drawings, 1 - base, 11 - base rod, 12 - connecting rod, 2 - support rod, 3 - support fork, 31 - T-shaped connecting rod, 32 - adjusting rod, 41 - groove rod, 410 - through groove, 411 - installation opening, 42 - locking part, 421 - elastic pressing block, 422 - limiting flange, 423 - socket ring, 4231 - vertical ear, 424 - eccentric pressing roller, 425 - operating rod, 426 - avoidance hole, 43 - insertion rod, 431 - guiding groove, 44 - extension rod, 45 - elastic insertion block, 46 - locking block, 461 - socket.

Detailed Embodiment

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] As Figures 1 to 5 shown, a preferred embodiment of the present invention provides a steel support device for a hydraulic tunnel, including a plurality of support units arranged along the length direction of the tunnel. Specifically, the number of support units is three. The support rod 2 of the support unit in the middle is perpendicular to the base 1, and the support rods 2 of the support units on both sides are inclined relative to the base 1 and are in an inverted "V" shape with each other. The support unit includes a base 1, a support rod 2 and a support fork 3. The bases 1 of two adjacent support units are detachably connected. The support rod 2 is disposed on the base 1 and extends away from the base 1. The support fork 3 is disposed at the end of the support rod 2 away from the base 1. Since the angles formed by the support rods 2 of the three support units with the ground are different, the support forks 3 can better adapt to the curvature of the steel in the tunnel. In addition, since the bases 1 of different support units are detachably connected, during actual construction, the constructor can select a suitable support unit for assembly construction according to the construction site, thereby increasing the flexibility of on-site construction.

[0038] In this embodiment, the base 1 includes a base rod 11 and a connecting rod 12. The number of base rods 11 is two and they are arranged in parallel. The connecting rod 12 connects the two base rods 11. The base rods 11 of two adjacent support units are detachably connected and the total length of the two connected base rods 11 can be adjusted; a support rod 2 is installed on one base rod 11. The total length of the connecting rod 12 can be adjusted and can be split into two sections. The length of a single base rod 11 can be adjusted. The foregoing features enable the steel support device for a hydraulic tunnel to adjust the size of the device according to the actual construction site, increasing its practicability. When the two adjacent base rods 11 are detached and the connecting rod 12 is split into two sections, each support rod 2 and the corresponding support fork 3 can be used alone as a support tool, increasing the flexibility of use of this device.

[0039] In this embodiment, both the base rod 11 and the connecting rod 12 are made of detachable telescopic steel pipes. Specifically, the detachable telescopic steel pipe includes a groove rod 41, a locking member 42, and an insertion rod 43. A through groove 410 is formed through the groove rod 41 in the length direction; the locking member 42 includes an elastic pressing block 421, a limiting flange 422, a socket ring 423, an eccentric pressing roller 424, and an operating rod 425. An installation opening 411 is formed at the end of the groove rod 41. The elastic pressing block 421 is clamped at the installation opening 411, and the bottom of the elastic pressing block 421 extends toward the through groove 410, and the top of the elastic pressing block 421 extends toward the outside of the groove rod 41; the limiting flange 422 is located at opposite ends of the elastic pressing block 421 and is connected to the elastic pressing block 421; the socket ring 423 is sleeved on the end of the groove rod 41 and wraps the limiting flange 422 therein. An avoidance hole 426 for the elastic pressing block 421 to extend outward is formed on the socket ring 423; the eccentric pressing roller 424 is rotatably arranged on the socket ring 423 and corresponds to the elastic pressing block 421. Specifically, rotating shafts are provided at opposite ends of the eccentric pressing roller 424. The rotating shafts are not shown in the figure. The rotating shafts are rotatably inserted into the lugs 4231 of the socket ring 423, and the rotating shafts are in frictional contact with the lugs 4231; the operating rod 425 is connected to the eccentric pressing roller 424; the insertion rod 43 is adapted to the inner diameter of the through groove 410 and is provided with a guiding groove 431 corresponding to the elastic pressing block 421. The peripheral surface of the elastic pressing block 421 is in contact with the inner wall of the guiding groove 431. When the operating rod 425 drives the eccentric pressing roller 424 to rotate and the larger-diameter side of the eccentric pressing roller 424 presses against the elastic pressing block 421, the elastic pressing block 421 presses against the inside of the guiding groove 431, playing a role in limiting the insertion rod 43; when the operating rod 425 drives the eccentric pressing roller 424 to rotate and the smaller-diameter side of the eccentric pressing roller 424 corresponds to the elastic pressing block 421, the elastic pressing block 421 is no longer pressed, and then the insertion rod 43 can move relative to the groove rod 41, thus playing a role in adjusting the entire detachable telescopic steel pipe.

[0040] In this embodiment, the length of the support rod 2 can be adjusted, and the support fork 3 is detachably connected to the support rod 2. Specifically, the support rod 2 is the aforementioned detachable telescopic steel pipe. The difference is that locking members 42 are provided at both opposite ends of the groove rod 41 of the detachable telescopic steel pipe. The detachable telescopic steel pipe further includes an extension rod 44, an elastic insert block 45, and a locking block 46. An extension rod 44 is connected to the operating rod 425 of a locking member 42 and the extension rod 44 extends towards the middle of the groove rod 41; the elastic insert block 45 is provided at the end of the extension rod 44 facing away from the operating rod 425; the locking block 46 is provided in the middle of the groove rod 41, and the locking block 46 is provided with a socket 461 adapted to each elastic insert block 45, and the socket 461 extends from the side of the locking block 46 to the outside of the locking block 46. When the operating rod 425 drives the extension rod 44 to rotate and the elastic insert block 45 is inserted into the socket 461, the elastic insert block 45 is deformed by the locking block 46 and then moves into the socket 461 and pops out from the side of the locking block 46. At this time, the extension rod 44 is further limited, so that the length of the entire support rod 2 is more stable.

[0041] In this embodiment, a groove for supporting the steel section is provided on the support fork 3, and this design is the same as the support structure in the prior art. An insertion rod 43 is provided on the side of the support fork 3 facing away from the groove, and the insertion rod 43 is used in cooperation with the corresponding locking member 42 on the support rod 2 to achieve the detachable connection between the support fork 3 and the support rod 2.

[0042] In this embodiment, the width of the support fork 3 can be adjusted. Specifically, the support fork 3 includes a T-shaped connecting rod 31 and two adjusting rods 32. An insertion rod 43 is provided below the T-shaped connecting rod 31 for detachably connecting with the support rod 2; the upper part of the T-shaped connecting rod 31 facing away from the insertion rod 43 is the groove rod 41 of the detachable telescopic steel pipe, and locking members 42 are provided at both opposite ends of the groove rod 41. The two adjusting rods 32 are provided with insertion rods 43 matching the corresponding locking members 42 to enclose a groove for supporting the steel section. When the two adjusting rods 32 move relative to the T-shaped connecting rod 31, the width of the groove of the support fork 3 can be adjusted.

[0043] This embodiment also provides a construction method for a steel section support device for a hydraulic tunnel, which is used for the above-mentioned steel section support device for a hydraulic tunnel, and includes the following steps:

[0044] S1 Determine the installation position of the steel section support device for the hydraulic tunnel at the initial support construction site of the tunnel, and carry out necessary site cleaning and preparation work;

[0045] S2 Install the components of the steel section support device for the hydraulic tunnel at the construction site in sequence. Specifically, place each component of the steel section support device for the hydraulic tunnel according to the site and the position of the pre-support steel section.

[0046] S3 adjusts the lengths of the base rods 11 and the connecting rod 12 to ensure that the device can accurately adjust the horizontal and vertical displacement sizes; by adjusting the length of the connecting rod 12, the distance between the two base rods 11 of the same base 1 is increased or decreased to meet the installation requirements for different spacings between two steel profiles, ensuring that the steel profile support device for the hydraulic tunnel can accurately adjust the horizontal displacement size;

[0047] S4 places the steel profile on the support fork 3 and adjusts the length of the support rod 2 according to the actual situation so that the distance and contact area between the support fork 3 and the steel profile meet the predetermined requirements, ensuring that the steel profile support device for the hydraulic tunnel can accurately adjust the vertical displacement size;

[0048] S5 monitors the position deviation and perpendicularity of the steel profile according to the real-time measurement data, and reduces the position deviation and perpendicularity deviation by adjusting the length and angle of the support rod 2.

[0049] In this embodiment, during the initial construction process of the steel profile support device for the hydraulic tunnel, the position deviation and perpendicularity of the steel profile are continuously supervised and adjusted to ensure the stability and safety of the initial support.

[0050] Using the device and method of this embodiment can achieve the following technical effects:

[0051] 1. Effectively control the installation accuracy problem of the steel profile: By precisely controlling the horizontal and vertical displacement amounts through the adjustment of the support device, the problem of reduced support effect caused by the deviation between the installation position of the steel profile and the designed position can be effectively reduced, improving the stability and safety of the initial support.

[0052] 2. Reduce construction risks: The use of the device can reduce the risks brought about by poor initial support effect during the construction process, reduce the probability of accidental events occurring during the project construction, and improve the safety of the construction site.

[0053] 3. Simple and efficient construction method: The construction method is simple and easy to implement, without complex operation processes and a large amount of manpower and material resources, and can quickly achieve the precision control of the steel profile installation, improving the construction efficiency.

[0054] 4. Reduce maintenance costs: By effectively controlling the installation precision of the steel profile, the service life of the initial support can be extended, the frequency and cost of maintenance and repair are reduced, and the operation cost of the underground project is lowered.

[0055] 5. Environmental protection and energy conservation: Optimize the energy consumption and material use during the construction process, reduce the impact of the initial support construction on the environment, and meet the requirements of sustainable development.

[0056] It can be understood that the detachable telescopic steel pipe is not limited to the structure in this embodiment. In other embodiments, the detachable telescopic steel pipe in the prior art can be adopted, such as the pipe fitting telescopic structure of a telescopic pipe disclosed in the utility model patent with the publication number CN218913389U, the telescopic steel pipe disclosed in the Chinese invention patent with the publication number CN112815156B, etc.

[0057] The above description is a detailed description of the preferred and feasible embodiment of the present invention. However, the embodiment is not used to limit the scope of the patent application of the present invention. Any equivalent changes or modifications completed under the technical spirit prompted by the present invention shall fall within the scope of the patent covered by the present invention.

Claims

1. A steel support device for a hydraulic tunnel, characterized in that: The invention comprises a plurality of support units, wherein the plurality of support units are arranged along the length direction of the tunnel; the support units comprise a base (1), a support rod (2) and a support fork (3); the bases (1) of two adjacent support units are detachably connected; the support rod (2) is arranged on the base (1) and extends in a direction away from the base (1); and the support fork (3) is arranged at the end of the support rod (2) away from the base (1).

2. The steel support device for a hydraulic tunnel according to claim 1, wherein: The base (1) comprises a base rod (11) and a connecting rod (12); the base rods (11) are two in number and are arranged in parallel; the connecting rod (12) connects the two base rods (11); the base rods (11) of two adjacent support units are detachably connected and the total length of the two connected base rods (11) is adjustable; and one support rod (2) is mounted on one base rod (11).

3. The steel support device for a hydraulic tunnel according to claim 2, characterized in that: The total length of the connecting rod (12) can be adjusted and can be split into two sections; the length of a single base rod (11) can be adjusted.

4. The steel support device for a hydraulic tunnel according to claim 3, characterized in that: The base rod (11) and the connecting rod (12) are both made of detachable telescopic steel pipes.

5. The steel support device for a hydraulic tunnel according to claim 4, characterized in that: The detachable telescopic steel tube includes a slot rod (41), a locking piece (42) and an insertion rod (43). The slot rod (41) is provided with a through slot (410) along the length direction; the locking piece (42) includes an elastic pressure block (421), a limiting flange (422), a sleeve ring (423), an eccentric pressure roller (424) and an operating rod (425). The end of the slot rod (41) is provided with a mounting opening (411). The elastic pressure block (421) is clamped at the mounting opening (411), and the bottom of the elastic pressure block (421) extends toward the through slot (410), and the top of the elastic pressure block (421) extends toward the outside of the slot rod (41); the limiting flange (422) is located on the elastic pressure block (421). The sleeve ring (423) is sleeved on the end of the slot rod (410) and covers the limiting flange (422) therein, and the sleeve ring (423) is provided with an avoidance hole (426) for the elastic pressure block (421) to extend outward; the eccentric pressure roller (424) is rotatably provided on the sleeve ring (423) and corresponds to the elastic pressure block (421); the operating rod (425) is connected to the eccentric pressure roller (424); the insertion rod (43) is adapted to the inner diameter of the through slot (410) and is provided with a guide groove (431) corresponding to the elastic pressure block (421), and the peripheral surface of the elastic pressure block (421) contacts the inner wall of the guide groove (431).

6. The steel support device for a hydraulic tunnel according to claim 5, characterized in that: The length of the support rod (2) is adjustable, and the support fork (3) is detachably connected to the support rod (2); the width of the support fork (3) is adjustable.

7. The steel support device for a hydraulic tunnel according to claim 6, characterized in that: The support rod (2) adopts the detachable telescopic steel pipe described in claim 5. The locking members (42) are provided at both opposite ends of the groove rod (41). The detachable telescopic steel pipe further includes an extension rod (44), an elastic insertion block (45), and a locking block (46). One extension rod (44) is connected to the operating rod (425) of one locking member (42), and the extension rod (44) extends towards the middle of the groove rod (41). The elastic insertion block (45) is provided at the end of the extension rod (44) facing away from the operating rod (425). The locking block (46) is provided in the middle of the groove rod (41). The locking block (46) is provided with a socket (461) adapted to the elastic insertion block (45), and the socket (461) extends from the side surface of the locking block (46) to the outside of the locking block (46).

8. The steel support device for a hydraulic tunnel according to claim 1, characterized in that: The number of the support units is three. The support rod (2) of the support unit in the middle is perpendicular to the base (1). The support rods (2) of the support units on both sides are inclined relative to the base (1) and form an inverted "V" shape with each other.

9. A construction method of a steel support device for a hydraulic tunnel, characterized in that, A method applicable to the steel section support device for a hydraulic tunnel described in claim 8 includes the following steps: S1 Determine the installation position of the steel section support device for the hydraulic tunnel at the initial support construction site of the tunnel, and carry out necessary site cleaning and preparation work; S2 Initially install the components of the steel section support device for the hydraulic tunnel at the construction site in sequence; S3 Adjust the lengths of the base rods (11) and the connecting rods (12) to ensure that the device can accurately adjust the offsets in the horizontal and vertical directions. By adjusting the length of the connecting rod (12), the distance between the two base rods (11) of the same base (1) is increased or decreased to meet the installation requirements for different spacings between two steel sections, and to ensure that the steel section support device for the hydraulic tunnel can accurately adjust the offset in the horizontal direction; S4 Place the steel section on the support fork (3), and adjust the length of the support rod (2) according to the actual situation to make the distance and contact area between the support fork (3) and the steel section meet the predetermined requirements, and ensure that the steel section support device for the hydraulic tunnel can accurately adjust the offset in the vertical direction; S5 Monitor the position deviation and verticality of the steel section according to the real-time measurement data, and reduce the position deviation and verticality deviation by adjusting the length and angle of the support rod (2).

10. The construction method of a steel support device for a hydraulic tunnel as described in claim 9, characterized in that: During the initial construction process of the steel section support device for the hydraulic tunnel, continuously supervise and adjust the position deviation and verticality of the steel section to ensure the stability and safety of the initial support.

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