Diversion tunnel plugging body structure

Abstract

The invention belongs to the technical field of diversion tunnel plugging bodies in water conservancy and hydropower engineering, and particularly discloses a diversion tunnel plugging body structure which comprises a plugging body, a prefabricated block and a moving unit, a hollow gallery is arranged in the plugging body, the prefabricated block is located in the hollow gallery, and the moving unit is located in the prefabricated block. And the moving unit is used for driving the prefabricated block to move in or out of the hollow gallery. According to the invention, the plugging body can have the condition of secondary treatment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of diversion tunnel plugging body in water conservancy and hydropower engineering, and particularly relates to a diversion tunnel plugging body structure. BACKGROUND

[0002] In the construction of water conservancy and hydropower engineering, the diversion tunnel is a very important building in the project, which is related to the construction progress and safety of the project. In particular, the diversion tunnel plugging body is an important part of the permanent project, and its design standard is the same as that of the dam. The long-term stability and maintainability of the plugging body directly affect the service life and flood control safety of the project.

[0003] The plugging body is commonly a columnar integral structure, and is arranged with surrounding rock consolidation grouting, top backfill grouting and peripheral joint joint grouting, which causes the plugging body construction to face the pressure of complex construction technology, tight construction period and heavy task, bringing great challenges to the rapid, safe, efficient and quality completion of the plugging construction task. The conventional scheme is to provide a temporary grouting gallery in the plugging body, which can reduce the interference with the concrete construction and facilitate the drilling and grouting construction in the gallery, meet the requirements of the project for impoundment and the construction progress of the plugging body, and then seal the gallery to form an integral structure after the construction is completed.

[0004] For the long-term operation of the plugging body, although backfill grouting, joint grouting and the like have been adopted, the grouting plugging effect may still be poor or cracks may occur at weak parts (such as construction joints) due to the thermal expansion and contraction performance of concrete, but the plugging body has been integrally poured, and the secondary treatment is costly and time-consuming. If the gallery gap is not sealed and the plugging body is not plugged as a channel for secondary treatment, the length of the plugging body will be increased to ensure the long-term safety and stability of the plugging body, the project investment will be increased, and the plugging period will be prolonged.

[0005] The existing patent technology with the patent number of "a plugging structure for diversion tunnel" proposes an olive-shaped plugging structure with a small end and a large middle in the longitudinal section, which reduces the plugging construction workload and improves the plugging effect. Although this technology optimizes the structure form, it still does not have the conditions for secondary treatment of the plugging body, i.e. it does not solve the core contradiction of being inspectable and repairable in the whole life cycle of the plugging body. Once leakage or damage occurs, it still can only rely on passive, inefficient and high-cost remedial measures such as external drilling and grouting. SUMMARY

[0006] The present application provides a diversion tunnel plugging body structure, which aims to enable the plugging body to have the conditions for secondary treatment.

[0007] The application is achieved by the following technical scheme: a diversion tunnel plugging body structure, comprising a plugging body, a prefabricated block and a moving unit, a hollow corridor is arranged in the plugging body, the prefabricated block is located in the hollow corridor, and the moving unit is used to drive the prefabricated block to move into or out of the hollow corridor.

[0008] Compared with the prior art, the present application has the following advantages and beneficial effects: The hollow corridor in the plugging body can be directly used as a grouting corridor during construction, without the need to additionally open a temporary passage, thereby reducing the mutual interference of concrete pouring and grouting construction and meeting the progress requirement of the project for storing water after the gate is closed; after the construction is completed, the prefabricated block is moved into the hollow corridor by the moving unit, which can quickly fill the space of the corridor, guarantee the overall structural stability of the plugging body, avoid the secondary construction cost and construction period consumption caused by the traditional temporary corridor plugging, and enable the plugging body to have the condition for secondary treatment.

[0009] The prefabricated block can be driven by the moving unit to move out of the hollow corridor, quickly empty the passage, and provide a safe and convenient internal working space for personnel and maintenance equipment, without the need to rely on passive methods such as external drilling, so that the concrete defects, construction joints, surrounding rock contact zones and other key parts of the plugging body can be directly inspected and accurately repaired at close range, and the passive post-event rescue repair is changed into proactive prevention and control.

[0010] In extreme cases (such as after an earthquake), the prefabricated block can be moved out to quickly enter the interior of the plugging body to evaluate the damage and implement repair, thereby improving the disaster resistance and rapid recovery ability of the project and the safety of the whole life cycle.

[0011] Further, the shape of the prefabricated block matches the shape of the hollow corridor, and an operating gap is reserved between the prefabricated block and the hollow corridor.

[0012] Beneficial effect: the prefabricated block matches the hollow corridor in shape, can tightly fill the space of the corridor during normal operation, avoids the problem of excessive gap or stress concentration caused by structural morphology misalignment, ensures that the plugging body and the prefabricated block form a synergistically stressed overall structure, meets the design standard of the dam level, resists the load of water pressure, surrounding rock stress and the like, guarantees the long-term stable operation of the plugging body, and does not affect the flood control safety and service life of the project.

[0013] The reserved operating gap provides necessary space for the movement of the prefabricated block as a whole, effectively avoiding the friction and jamming risk between the block and the corridor wall.

[0014] Further, a plurality of lifting rings are arranged on the top of the prefabricated block, and the plurality of lifting rings are distributed along the length direction of the prefabricated block.

[0015] Beneficial effect: The arrangement of the lifting rings facilitates hoisting and positioning of the prefabricated block, and facilitates later operation and maintenance. The multiple lifting rings are distributed along the length direction of the block, so that the stress points during hoisting are uniformly distributed on the top of the block, avoiding the inclination and overturning of the block caused by single-point or offset hoisting, and ensuring that the prefabricated block always maintains a horizontal posture during hoisting.

[0016] Further, the bottom of the prefabricated block is provided with a tray, the prefabricated block is located on the tray, and the bottom of the tray is provided with a roller.

[0017] Beneficial effect: The tray in this scheme provides a stable bearing foundation for the prefabricated block, and cooperates with the roller design at the bottom to convert the sliding friction between the block and the gallery track into rolling friction, greatly reducing the moving resistance.

[0018] Further, the bottom of the hollow gallery is provided with a track, the track is laid along the length direction of the hollow gallery, and the roller is in sliding cooperation with the track.

[0019] Beneficial effect: The track is accurately laid along the length direction of the hollow gallery, providing a clear moving path for the roller, which can strictly limit the moving track of the prefabricated block, avoiding the problems of deviation, inclination or blockage.

[0020] Further, the bottom of the hollow gallery is provided with a base, the track is provided with two tracks, the two tracks are arranged in parallel with each other, and a plurality of fixed fasteners are sequentially connected along the length direction of the track, the fixed fasteners are fixedly connected with the base, and the roller is provided with multiple groups, each group of the roller is symmetrically arranged on both sides of the tray, and multiple groups of the roller are sequentially arranged along the length direction of the tray.

[0021] Beneficial effect: The base at the bottom of the hollow gallery provides a stable installation foundation for the track, cooperates with the design of the double tracks arranged in parallel with each other, and combines the sequential fixation of the fixed fasteners along the length direction of the track (rigidly connected with the base), which can strictly control the parallelism, track gauge deviation and top elevation error of the track, avoid the deviation and looseness of the track due to long-term bearing or structural deformation, and ensure the cooperation accuracy of the track and the roller. The multiple groups of rollers symmetrically arranged on both sides of the tray are accurately matched with the double parallel tracks to form a multi-point symmetric support structure, which can effectively resist the lateral force during the movement of the prefabricated block and prevent the tray from tilting or overturning.

[0022] Further, the tray is provided with multiple trays, the multiple trays are laid along the length direction of the prefabricated block, and adjacent two trays are connected with each other.

[0023] Beneficial effects: Multiple trays are laid continuously along the length direction of the prefabricated blocks, which can fully cover the supporting surface of the block bottom and avoid local stress concentration caused by single tray support. Adjacent trays are connected to each other, so that multiple trays and corresponding prefabricated blocks form a complete train type moving unit instead of single block independent operation. The multi-tray modular design can adapt to prefabricated blocks of different lengths, without the need to customize large trays of special size, thereby improving the universality of components. Adjacent trays are connected to each other, and only need to be spliced and fixed at a preset interval during installation. Combined with the high-precision laying of the track, the assembly of the moving unit can be quickly completed, thereby shortening the construction period. During later maintenance, if a single tray or roller fails, it can be replaced individually without disassembling the entire unit, thereby reducing maintenance downtime and cost and improving operation convenience.

[0024] Further, each roller at the bottom of the tray is provided with multiple groups.

[0025] Beneficial effects: In this way, the tray can run smoothly along the track without jamming. Multiple groups of rollers at the bottom of each tray can further distribute the load, ensure that the prefabricated block does not tilt or deform when stationary, and ensure that the force is stable when moving, thereby protecting the structural integrity of the prefabricated block and the sealing body.

[0026] Further, a connecting seat is fixedly connected to each of the plurality of trays, and a connecting rod is detachably connected between the connecting seats of adjacent two trays.

[0027] Beneficial effects: The combination of the connecting seat and the detachable connecting rod allows multiple trays to be spliced flexibly according to the length of the prefabricated block and the size of the hollow corridor, without the need to customize an integral long tray. Adjacent trays are fixedly connected through the connecting rod and the connecting seat to form a rigid overall frame, which, in combination with the tray structure, can effectively transmit traction force to ensure that the entire train of trays and prefabricated blocks moves in and out synchronously under the drive of the moving unit, thereby avoiding the jamming problem caused by the deviation and misplacement of a single tray.

[0028] Further, the moving unit comprises a double-drum winch, a steel wire rope and a fixed pulley. The double-drum winch is arranged outside the hollow corridor. The fixed pulley is fixed to the lower side wall of the hollow corridor. One end of the steel wire rope is connected to the tail end of the tray, passes over the fixed pulley and is then introduced to the drum of the double-drum winch, and then extends to the head end of the tray to form a closed traction loop. The double-drum winch is used to synchronously wind and unwind the steel wire rope to drive the prefabricated block to move into or out of the hollow corridor.

[0029] Beneficial effects: When the double-drum winch is running, it synchronously winds up and unwinds the steel wire ropes connecting the first and last pallets, moving the entire row of precast blocks into or out of the hollow corridor via fixed pulleys. In this scheme, the closed-loop traction design achieves the movement of blocks in and out using only one set of double-drum winches and fixed pulleys, eliminating the need for additional reverse traction equipment, thus simplifying system composition and installation. The fixed pulleys are fixed to one side wall at the bottom of the hollow corridor, resulting in a compact layout that does not occupy corridor passage space. Combined with standardized steel wire rope winding methods, construction personnel can quickly complete system assembly and debugging, shortening the construction period and lowering the technical threshold.

[0030] Furthermore, the synchronous traction function of the dual-drum winch can quickly drive the entire row of precast blocks out, significantly shortening the time for the corridor to be cleared and saving valuable time for personnel and maintenance equipment to enter the sealed-off area. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a longitudinal cross-sectional view of the hollow corridor in an embodiment of the diversion tunnel sealing structure of the present invention; Figure 2 This is a structural diagram showing the arrangement of prefabricated blocks and tracks in an embodiment of a diversion tunnel sealing structure according to the present invention; Figure 3 This is a track layout diagram of an embodiment of a diversion tunnel sealing structure according to the present invention; Figure 4 This is a diagram showing the arrangement of the moving unit in an embodiment of a diversion tunnel sealing structure according to the present invention.

[0032] The attached diagram shows the markings and corresponding component names: 1. Block body; 2. Hollow corridor; 3. Rail; 4. Corridor entrance and exit; 5. Precast block; 6. Lifting ring; 7. Pallet; 8. Roller; 9. Connecting rod; 10. Connecting seat; 11. Base; 12. Fixing fastener; 13. Anchor bolt; 14. Double drum winch; 15. Wire rope; 16. Fixed pulley. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0034] As one embodiment of this application, such as Figures 1-2As shown, this embodiment provides a diversion tunnel sealing structure, including a sealing body 1, a precast block 5, and a moving unit. A hollow corridor 2 is provided inside the sealing body 1. In this embodiment, the right end of the hollow corridor 2 is the corridor entrance / exit 4. The precast block 5 is located inside the hollow corridor 2. The moving unit is used to drive the precast block 5 to move in or out of the hollow corridor 2. The corridor entrance / exit 4 provides passage space for the precast block 5 to move in and out.

[0035] In one embodiment, the sealing body 1 is made of C25 low-heat micro-expansion concrete. A permanent hollow corridor 2 is laid inside the sealing body 1 as a permanent maintenance passage and a grouting corridor during construction. The cross-section of the hollow corridor 2 is a city gate shape, with a minimum clearance size of not less than 2.0m × 3.5m (width × height) to meet the passage of small maintenance vehicles and equipment and provide sufficient space for internal operations.

[0036] In one embodiment, the precast block 5 is a precast concrete block with a concrete grade of not less than C30. The shape of the precast block 5 matches the shape of the hollow corridor 2, and a running gap is reserved between the precast block 5 and the hollow corridor 2. In this embodiment, the outline dimension of the precast block 5 is slightly smaller than that of the hollow corridor by 10 to 15 cm to reserve a running gap for easy movement of the whole structure. The length of the precast block 5 is 1.0 to 2.0 m to control the lifting weight.

[0037] In one embodiment, such as Figure 2 As shown, in this embodiment, the top of the precast block 5 is provided with multiple lifting rings 6. The multiple lifting rings 6 are distributed at intervals along the length direction of the precast block 5. In this embodiment, the lifting rings 6 are pre-embedded in the top of the precast block 5 for hoisting and positioning.

[0038] In one embodiment, such as Figure 2 As shown, in this embodiment, a tray 7 is provided at the bottom of the precast block 5, the precast block 5 is located on the tray 7, the tray 7 provides a supporting foundation for the precast block 5, and rollers 8 are provided at the bottom of the tray 7 to facilitate the removal or movement of the precast block 5.

[0039] In this embodiment, the pallet 7 is a rigid pallet 7 welded from Q355B high-strength steel to match the bottom of the precast block 5. ZG270-500 cast steel load-bearing rollers 8 are installed at the bottom of the pallet 7. The rated dynamic load of a single roller is ≥8t, and the diameter of the roller 8 is 200mm.

[0040] In one embodiment, such as Figure 2 and Figure 4 As shown, a track 3 is installed at the bottom of the hollow corridor 2. The track 3 is laid along the length of the hollow corridor 2, and the rollers 8 slide in cooperation with the track 3. Specifically: combined with Figure 3As shown, in this embodiment, the track 3 is made of Q235B steel. A base 10 is provided at the bottom of the hollow corridor 2. The base 10 is a concrete base formed by concrete pouring. There are two tracks 3, which are arranged parallel to each other. Multiple fixing fasteners 11 are connected to the track 3 along its length. In this embodiment, the fixing fasteners 11 are fixedly connected to the side wall of the track 3 by welding or bolting. The fixing fasteners 11 are fixedly connected to the base 10. In this embodiment, the fixing fasteners 11 and the base 10 are fixedly connected by anchor bolts 12.

[0041] In this embodiment, multiple sets of rollers 8 are provided. Each set of rollers 8 is symmetrically arranged on both sides of the tray 7. In this embodiment, each set of rollers 8 consists of two rollers. The two rollers 8 are symmetrically arranged on both sides of the tray 7 and slide in cooperation with the two tracks 3 respectively. Multiple sets of rollers 8 are arranged sequentially along the length of the tray 7, thereby providing multi-point support for the precast block 5 and ensuring the stability of the precast block 5.

[0042] In one embodiment, such as Figure 2 As shown, in this embodiment, multiple trays 7 are provided. The multiple trays 7 are laid along the length direction of the precast block 5, and adjacent two trays 7 are connected to each other. Specifically, each of the multiple trays 7 is fixedly connected to a connecting seat 901. In this embodiment, the connecting seat 901 is welded or bolted to the tray 7. A connecting rod 9 is detachably connected to the connecting seat 901 between adjacent two trays 7. In this embodiment, the connecting rod 9 is a solid alloy steel connecting rod 9. The trays 7 are connected in series through the connecting rod 9 to form a train-type unit structure that can be moved as a whole.

[0043] In this embodiment, the connecting seat 901 has pre-set bolt holes, and the connecting rod 9 has ear plates machined at both ends. The bolts are used to fix the connecting seat 901 by passing through the ear plates.

[0044] In one embodiment, such as Figure 2 As shown, each tray 7 has multiple sets of rollers 8 at its bottom. In this embodiment, each tray 7 has no fewer than four sets of rollers 8 at its bottom to ensure smooth operation along the track 3 without jamming, and to provide more stable support for the tray 7 and the precast block 5.

[0045] In one embodiment, combined Figure 4 As shown, the moving unit in this embodiment includes a double-drum winch 13, a wire rope 14, and a fixed pulley 15. The double-drum winch 13 is arranged outside the hollow corridor 2. The double-drum winch 13 has two drums to ensure mechanically synchronously winding and unwinding the wire rope 14. The double-drum winch 13 in this embodiment is model JML-100 / 2-5-BX, with a single rope rated tension of 100kN. The two drums (diameter ≥400mm) are mechanically synchronized to ensure synchronous winding and unwinding of the cable. In this embodiment, the fixed pulley 15 is fixed to the lower side wall of the hollow corridor 2 (located on the opposite side of the corridor entrance and exit 4), and one end of the wire rope 14 is connected to the tail end of the tray 7 (i.e. Figure 4 (at the left end of the middle), and after passing around the fixed pulley 15, it is led to the drum on the double drum winch 13, and then extends to the first end of the tray 7 (i.e., the left end of the tray 7). Figure 4 The right end of the structure forms a closed traction circuit, and the double-drum winch 13 is used to synchronously wind up and unwind the wire rope 14 to drive the precast block 5 to move in or out of the hollow corridor 2.

[0046] The specific implementation process is as follows: The precast block 5 is hoisted to the corridor entrance / exit 4 by connecting the pre-embedded lifting ring 6 on the top of the precast block 5 with the crane hook. The lifting angle is adjusted, and the block is slowly hoisted above the pallet 7. The precast block 5 is then slowly lowered onto the pallet 7. The double-drum winch 13 is started, and the moving speed is controlled to ≤0.5m / s. The pallet 7 is driven to move the precast block 5 along the track 3 into the hollow corridor 2. In case of extreme conditions, the double-drum winch 13 is immediately started to quickly move the precast block 5 out as a whole. The damage is assessed as soon as possible inside the sealing body 1. Emergency repairs are carried out based on the assessment results. After the repairs are completed, the precast block 5 is quickly reset to ensure the flood control safety of the project.

[0047] This invention incorporates a permanent hollow corridor within the sealing body, which also serves as a grouting corridor during construction, ensuring the sealing construction period. Furthermore, it allows for proactive access to the sealing body in the later stages to directly and closely inspect and repair concrete defects, construction joints, and surrounding rock contact zones, transforming reactive emergency repairs into proactive prevention and control.

[0048] During maintenance, there is no need for passive methods such as external drilling and grouting. Personnel and equipment can directly enter the defective area, achieving precise, efficient, and low-cost treatment, saving project investment and shortening the treatment period. In extreme situations (such as after an earthquake), it is possible to quickly enter the sealing body to assess the damage and carry out repairs, improving the project's disaster resilience and rapid recovery capabilities, as well as its safety throughout its entire life cycle.

[0049] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A structure for sealing a diversion tunnel, characterized in that, It includes a sealing body, prefabricated blocks, and a moving unit. The sealing body has a hollow corridor, the prefabricated blocks are located in the hollow corridor, and the moving unit is used to drive the prefabricated blocks to move in or out of the hollow corridor.

2. The diversion tunnel sealing structure according to claim 1, characterized in that, The shape of the prefabricated block matches the shape of the hollow corridor, and an operating gap is reserved between the prefabricated block and the hollow corridor.

3. The diversion tunnel sealing structure according to claim 1, characterized in that, The top of the precast block is provided with multiple lifting rings, which are spaced apart along the length of the precast block.

4. The diversion tunnel sealing structure according to claim 1, characterized in that, The bottom of the precast block is provided with a tray, the precast block is located on the tray, and the bottom of the tray is provided with rollers.

5. The diversion tunnel sealing structure according to claim 4, characterized in that, The hollow corridor is equipped with a track at the bottom, which is laid along the length of the hollow corridor, and the rollers slide in cooperation with the track.

6. The diversion tunnel sealing structure according to claim 5, characterized in that, The hollow corridor is provided with a base at the bottom. There are two tracks, which are arranged parallel to each other. Multiple fixing fasteners are connected to each track along its length. The fixing fasteners are fixedly connected to the base. Multiple sets of rollers are provided. Each set of rollers is symmetrically arranged on both sides of the tray. The multiple sets of rollers are arranged sequentially along the length of the tray.

7. The diversion tunnel sealing structure according to claim 4, characterized in that, Multiple pallets are provided, and the multiple pallets are laid along the length direction of the precast block, with adjacent pallets connected to each other.

8. The diversion tunnel sealing structure according to claim 7, characterized in that, Each of the trays has multiple sets of rollers at its bottom.

9. The diversion tunnel sealing structure according to claim 7, characterized in that, Each of the trays is fixedly connected to a connecting seat, and a connecting rod is detachably connected to the connecting seat between two adjacent trays.

10. A diversion tunnel sealing structure according to any one of claims 4-9, characterized in that, The moving unit includes a double-drum winch, a wire rope, and a fixed pulley. The double-drum winch is arranged outside the hollow corridor, and the fixed pulley is fixed to the lower side wall of the hollow corridor. One end of the wire rope is connected to the tail end of the tray, passes around the fixed pulley, and is led to the drum on the double-drum winch, and then extends to the head end of the tray to form a closed traction circuit. The double-drum winch is used to synchronously wind up and unwind the wire rope to drive the precast block to move in or out of the hollow corridor.

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