Prefabricated wall seat device for corrugated steel vertical shaft

Abstract

The utility model discloses a prefabricated wall seat device for a corrugated steel vertical shaft, and belongs to the technical field of ventilation vertical shaft engineering. A corrugated steel vertical shaft prefabricated wall base device comprises at least two prefabricated modules, each prefabricated module is provided with an internal supporting frame and is further provided with an anchoring system used for fixing the prefabricated modules to a vertical shaft wall, a sealing gasket is arranged between the contact faces of the prefabricated modules and the vertical shaft wall, and after a vertical shaft is excavated, the position where a wall base needs to be arranged is drilled. Meanwhile, the prefabricated modules are hoisted to the working platform, then the prefabricated modules are fixed to the surrounding rock of the shaft wall of the vertical shaft through the anchoring system and spliced into a ring, the self-weight load of the primary support of the vertical shaft is borne in time, and compared with a traditional cast-in-place reinforced concrete wall base, construction of the vertical shaft wall base can be completed without expanding excavation of the shaft wall of the vertical shaft; meanwhile, the device is mainly a prefabricated part, steel bar binding and concrete pouring are not needed, and the material consumption and the transportation cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of ventilation shaft engineering technology, and in particular to a prefabricated wall support device for corrugated steel shafts. Background Technology

[0002] In the field of ventilation shaft engineering for highway tunnels, constructing reinforced concrete walls to support the initial weight of the shaft in hard rock shafts requires enlarging the shaft walls. However, this enlargement increases the workload of shaft excavation and subsequent wall construction, as well as the amount of steel and concrete used for initial support. The construction process is complex and the construction period is long. Especially in hard rock shafts constructed using full-face tunnel boring machines, blasting methods cannot be used for enlargement due to limitations in protecting the machinery and working face. Mechanical excavation is inefficient in breaking rock in hard rock and is almost impossible. Therefore, designing a new structural form to replace the traditional cast-in-place reinforced concrete walls in ventilation shafts, avoiding the need for shaft wall enlargement, simplifying construction procedures, and improving construction efficiency has become an urgent problem to be solved. Utility Model Content

[0003] The purpose of this utility model is to solve the problems in the existing technology that firstly, it requires excavation before construction, and secondly, the construction process of cast-in-place reinforced concrete wall bases is complex and the construction period is long. Therefore, a corrugated steel shaft prefabricated wall base device is proposed.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A prefabricated wall support device for corrugated steel shafts includes at least two prefabricated modules for quickly forming a load-bearing ring. Each prefabricated module is provided with an internal support frame to enhance overall rigidity and is also equipped with an anchoring system to fix the prefabricated module to the shaft wall. A sealing gasket is provided between the contact surface between the prefabricated module and the shaft wall to prevent groundwater leakage.

[0006] In order to quickly bear the self-weight load of the initial support of the shaft, simplify the construction process and improve efficiency, preferably, the prefabricated module includes corrugated steel plates, adjacent corrugated steel plates are spliced ​​into a ring structure, and connectors to realize the rapid locking between adjacent corrugated steel plates.

[0007] In order to complete the installation in a short time and provide sufficient preload, the corrugated steel plate has plug-in interfaces on both sides, and the connector passes through the plug-in interfaces to align adjacent corrugated steel plates during installation.

[0008] To evenly distribute the pressure from the upper structure and prevent localized deformation or damage, the internal support frame is further composed of structural steel and is firmly connected to the corrugated steel plate by welding to form an integrated structure.

[0009] To provide excellent tensile and shear strength, the anchoring system preferably includes steel anchors and steel strands, the diameter of which and the number of the steel anchors and steel strands distributed in the circumferential direction of the shaft wall are proportional to the initial support thickness of the shaft.

[0010] In order to solidify and form a strong bond in a short time, the steel anchor rods and steel strands are firmly embedded in the rock. Furthermore, the steel anchor rods and steel strands are anchored with resin anchoring agent, and a normal preload is applied when fixing the corrugated steel plate.

[0011] To reduce local stress concentration and enhance the overall structural safety, the holes on the shaft wall for installing the high-strength steel strands are angled upwards.

[0012] Compared with the prior art, this utility model provides a prefabricated corrugated steel shaft wall support device, which has the following beneficial effects:

[0013] 1. This corrugated steel shaft prefabricated wall support device, through modular design, allows all components to be mass-produced in the factory, resulting in stricter quality control. It also facilitates transportation and on-site assembly. After the shaft is excavated, holes are drilled at the locations where the wall support needs to be installed. At the same time, the prefabricated modules are hoisted to the working platform and then fixed to the surrounding rock of the shaft wall through an anchoring system and spliced ​​into a ring to promptly bear the self-weight load of the initial support of the shaft. Compared with traditional cast-in-place reinforced concrete wall supports, this device can complete the construction of the shaft wall support without expanding the shaft wall. In addition, since the device is mainly composed of prefabricated components, there is no need for steel reinforcement binding and concrete pouring, reducing material usage and transportation costs.

[0014] 2. The corrugated steel shaft prefabricated wall support device enhances the overall rigidity of the prefabricated module by adding an internal support frame, and distributes the pressure from the upper structure more evenly, so that the entire wall support device can maintain shape stability when bearing large loads and will not undergo excessive deformation.

[0015] 3. The precast wall support device for corrugated steel shafts allows for adjustments to the diameter and quantity of steel anchor rods and strands based on the initial support thickness of the shaft. This enables the anchoring system to flexibly adapt to various construction conditions, improving its applicability and reliability. The use of resin anchoring agent reduces waiting time, and the application of normal pre-tightening force not only provides strong bonding force but also effectively transmits external loads, ensuring that the anchoring points do not loosen or fail.

[0016] 4. The prefabricated wall support device for the corrugated steel shaft features angled upward holes on the shaft wall for installing steel strands. This angle enhances the anchoring strength of the steel strands, making the entire anchoring system more stable and reliable. It effectively copes with complex geological conditions and large external loads, simplifies drilling operations, avoids drilling deviations that may occur with horizontal holes, improves construction accuracy and speed, effectively prevents groundwater infiltration, reduces maintenance workload, and extends the service life of the wall support device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a prefabricated corrugated steel shaft wall support device proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the prefabricated module structure of a corrugated steel shaft prefabricated wall support device proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the installation structure of a high-strength steel anchor bolt for a prefabricated corrugated steel shaft wall support device proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the high-strength steel strand installation structure of a prefabricated corrugated steel shaft wall support device proposed in this utility model.

[0021] In the diagram: 1. Prefabricated module; 101. Corrugated steel plate; 102. Connector; 103. Plug-in interface; 2. Internal support frame; 3. Anchoring system; 301. Rebar anchor; 302. Steel strand; 4. Sealing gasket. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Example:

[0025] Reference Figures 1-4A prefabricated wall support device for corrugated steel shafts includes at least two prefabricated modules 1 for rapidly forming a bearing ring. After the shaft excavation is completed, holes are drilled at the locations where the wall support needs to be installed. Then, the prefabricated modules 1 are hoisted onto a working platform and quickly assembled into a ring structure. This process eliminates the need for widening or pouring reinforced concrete on the shaft wall, significantly reducing on-site construction time and difficulty. The prefabricated modules 1 are equipped with an internal support frame 2, which is composed of shaped steel sections. These steel sections are precisely cut and processed according to design requirements to ensure dimensional accuracy and mechanical properties, and are welded to the corrugated steel plate 101. The prefabricated modules are securely connected to form an integrated structure, which enhances the overall rigidity and evenly distributes the pressure from the upper structure, preventing local deformation or damage. It is also equipped with an anchoring system 3 to firmly fix the prefabricated modules 1 to the shaft wall and improve the vertical bearing capacity of the prefabricated modules 1, ensuring that it can safely and reliably bear the initial support self-weight load. A sealing gasket 4 is provided between the contact surface between the prefabricated modules 1 and the shaft wall. The sealing gasket 4 is usually made of double or multi-layer composite material, which has good waterproof performance, can effectively prevent groundwater leakage, protect the internal structure from corrosion, and extend the service life.

[0026] This corrugated steel shaft prefabricated wall support device adopts a modular design, allowing all components to be mass-produced in the factory, resulting in stricter quality control. It also facilitates transportation and on-site assembly. After the shaft is excavated, holes are drilled at the locations where the wall support needs to be installed. Simultaneously, the prefabricated module 1 is hoisted onto the working platform and then fixed to the surrounding rock of the shaft wall using the anchoring system 3, and spliced ​​into a ring to promptly bear the self-weight load of the initial support of the shaft. Compared with traditional cast-in-place reinforced concrete wall supports, this device can complete the construction of the shaft wall support without expanding the shaft wall. Furthermore, since the device is mainly composed of prefabricated components, there is no need for rebar tying and concrete pouring, reducing material usage and transportation costs.

[0027] Prefabricated module 1 includes high-strength, corrosion-resistant corrugated steel plates 101. On the construction site, adjacent corrugated steel plates 101 are spliced ​​together to form a ring structure through designed interfaces. This ring structure can quickly bear the self-weight load of the initial support of the shaft without requiring excavation or reinforced concrete pouring of the shaft wall, simplifying the construction process and improving efficiency. It also includes connectors 102 to achieve rapid locking between adjacent corrugated steel plates 101, as detailed below:

[0028] Both sides of the corrugated steel plate 101 have plug-in interfaces 103. Preferably, the plug-in interfaces 103 are designed as a flange and groove mating structure. One side of the corrugated steel plate 101 has an outwardly extending flange, and the other side has a corresponding groove. The two can fit tightly together to ensure seamless connection between modules. The connector 102 passes through the plug-in interface 103. The connector 102 is a quick fastener, such as a bolt or a clip, preferably a bolt, to further strengthen the connection strength between adjacent corrugated steel plates 101. It can complete the installation in a short time, provide sufficient preload, and make adjacent corrugated steel plates 101 automatically aligned during the installation process.

[0029] The anchoring system 3 includes steel anchor bolts 301 and steel strands 302. The steel anchor bolts 301 are a key component ensuring the prefabricated module 1 is firmly fixed to the shaft wall, possessing excellent tensile and shear strength. The steel strands 302 further enhance the anchoring effect. The diameter of the steel anchor bolts 301 and steel strands 302, as well as their circumferential distribution on the shaft wall, are proportional to the initial support thickness of the shaft. Specifically, thicker initial support may require larger diameter anchor bolts and a greater number of strands to provide sufficient support; conversely, for thinner initial support,... Smaller diameter anchors and fewer anchors can be selected to better adapt to construction needs under different geological conditions, ensuring the safety and stability of the wall base device. High-strength steel anchors 301 and high-strength steel strands 302 are anchored with resin anchoring agent, which can cure in a short time and form a strong bond force, firmly embedding the steel anchors 301 and steel strands 302 into the rock. When fixing the corrugated steel plate 101, a normal preload is applied. This preload helps to improve the load-bearing capacity and stability of the anchoring system 3 and prevents loosening or slippage caused by external loads.

[0030] Furthermore, to improve the anchoring effect of the steel strand 302, the holes on the shaft wall for installing the steel strand 302 are angled upwards. This increases the contact area and friction between the steel strand 302 and the hole wall, making it less prone to slippage when under tension, thus improving the stability of the anchoring. At the same time, the angled upwards holes help to better transfer external loads to the surrounding rock, reducing local stress concentration and enhancing the safety of the overall structure. They also help prevent groundwater from seeping in along the borehole, thereby protecting the internal structure from corrosion and extending its service life.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A prefabricated wall support device for corrugated steel vertical shafts, characterized in that, It includes at least two prefabricated modules (1) for quickly forming a load-bearing ring. Each prefabricated module (1) is provided with an internal support frame (2) to enhance overall rigidity and is also equipped with an anchoring system (3) for fixing the prefabricated module (1) to the shaft wall. A sealing gasket (4) is provided between the prefabricated module (1) and the well wall contact surface to prevent groundwater leakage.

2. The prefabricated corrugated steel shaft support device according to claim 1, characterized in that, The prefabricated module (1) includes corrugated steel plates (101), adjacent corrugated steel plates (101) are spliced ​​to form a ring structure, and The connector (102) enables quick locking between adjacent corrugated steel plates (101).

3. The prefabricated corrugated steel shaft wall support device according to claim 2, characterized in that, Both sides of the corrugated steel plate (101) have plug-in interfaces (103), and the connector (102) passes through the plug-in interfaces (103) to align adjacent corrugated steel plates (101) during installation.

4. A prefabricated corrugated steel shaft support device according to claim 2, characterized in that, The internal support frame (2) is composed of steel profiles and is firmly connected to the corrugated steel plate (101) by welding to form an integrated structure.

5. A prefabricated corrugated steel shaft wall support device according to claim 1, characterized in that, The anchoring system (3) includes steel anchor rods (301) and steel strands (302). The diameter of the steel anchor rods (301) and the number of steel strands (302) distributed in the circumferential direction of the shaft wall are proportional to the initial support thickness of the shaft.

6. A prefabricated corrugated steel shaft support device according to claim 5, characterized in that, Both the steel anchor rod (301) and the steel strand (302) are anchored with resin anchoring agent, and a normal preload is applied when fixing the corrugated steel plate (101).

7. A prefabricated corrugated steel shaft support device according to claim 6, characterized in that, The wire holes on the shaft wall for installing the steel strand (302) are angled upwards.

Images