Prestressed steel lining structure and construction method thereof
Through the design of the prestressed steel lining structure, the buffer layer and damping layer are used to resist water flow vibration, which solves the problem of difficulty in sealing the pores between the steel lining and concrete, reduces the risk of damage to the steel lining structure, and realizes the safety and stability of the steel lining structure.
Patent Information
- Application Number
- CN202510754927.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-06
- Publication Date
- 2025-08-19
AI Technical Summary
In the prior art, the pores between the steel lining and concrete are difficult to be completely closed, resulting in the steel lining being easily damaged by vibration under erosion of high water heads, large flow rate, and high flow rate water flow, which increases the risk of damage and is complicated to grouting construction.
The prestressed steel lining structure is used, including concrete body, steel plate, prestressed rib, buffer layer and anchor head. It is connected by reserved holes and solid connection structures to avoid grouting construction, and the buffer layer and damping layer are used to resist water flow vibration, reducing the risk of steel lining damage.
Effectively resist water flow vibration, reduce the risk of concrete damage on the lower part of the steel liner, avoid safety hazards in traditional grouting construction, and ensure the safety and stability of the steel liner structure.
Smart Images
Figure CN120505925A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a prestressed steel lining structure and a construction method thereof, and is applicable to the technical field of tunnel construction. Background Art
[0002] Large hydropower station water intakes and diversion tunnel inlets often experience adverse operating conditions such as high head, high flow rates, and high velocity. Steel linings are an optimal design for combating erosion in river channels with high bedloads, but they often require grouting to seal the pores between the steel lining and the concrete. Grouting is complex, and it can be difficult to completely seal small pores.
[0003] During the operation of the inlet structure, water level fluctuations are inevitable, with transitions from unpressurized flow to pressurized flow, and potentially prolonged periods of semi-pressurized flow in between. The unstable nature of semi-pressurized flow can easily lead to localized pressure fluctuations. The cycling of positive and negative pressures at varying frequencies can cause vibrations in the inlet's steel lining, increasing the risk of damage to the underlying concrete. This, in turn, increases the vibration amplitude and accelerates the damage of the inlet's steel lining. If grouting fails to seal the gaps between the concrete and the steel lining, the risk of the steel lining yielding from vibrations will increase further. Summary of the Invention
[0004] The technical problem to be solved by the present invention is: In order to solve the above technical problems, the present invention provides a prestressed steel lining structure and a construction method thereof.
[0005] The technical solution adopted by the present invention is: a prestressed steel lining structure having: Concrete body, with prestressed tendons embedded in the concrete body, the prestressed tendons extending out of the concrete body; The steel plate is paved on the concrete body. Prestressed holes are made on the steel plate at the positions corresponding to the prestressed tendons. The prestressed tendons can extend out of the concrete body through the reserved holes. The prestressed tendons and the steel plate are connected by a fixed connection structure. A buffer layer is arranged on the side of the steel plate facing the concrete body; The concrete layer is formed by solidifying the concrete material that is filled between the steel plate and the concrete body through the reserved holes on the steel plate.
[0006] The buffer layer comprises an expansion layer laid on a steel plate and a damping layer laid on the expansion layer. Adhesive layers are laid between the expansion layer and the steel plate and between the expansion layer and the damping layer. The damping layer is made of rubber material and the adhesive layer is made of industrial flexible adhesive material.
[0007] A coupling layer consisting of butter brushed on the damping layer is laid on the damping layer.
[0008] A rib is fixedly installed on the side of the steel plate facing the concrete body. The ribs are meshed on the steel plate as a whole. A first reserved hole is made at the intersection of the meshed ribs on the steel plate, and a second reserved hole is made at the center of the mesh of the meshed ribs on the steel plate. The prestressed tendons passing through the first reserved holes are the first prestressed tendons, and the prestressed tendons passing through the second reserved holes are the second prestressed tendons. Concrete material is filled between the steel plate and the concrete body through the first reserved holes.
[0009] The end of the first prestressed tendon is threaded, and the fixed connection structure between the first prestressed tendon and the steel plate has a first anchor head that cooperates with the thread of the first prestressed tendon. A pre-buried pipe is mounted on the first prestressed tendon. The first anchor head can extend into the first reserved hole and abut against the pre-buried pipe. The first anchor head installed on the first prestressed tendon is welded to the steel plate.
[0010] The end of the second prestressed tendon is threaded, and the fixing structure between the second prestressed tendon and the steel plate has a second anchor head that cooperates with the thread of the second prestressed tendon. A reinforcement plate is fixedly installed at the corresponding position of the second reserved hole on the side of the steel plate facing the concrete body. The second anchor head can extend into the second reserved hole and abut against the reinforcement plate. The second anchor head installed on the second prestressed tendon is welded to the steel plate.
[0011] A rubber sleeve is sleeved on the prestressed tendon.
[0012] A construction method for a prestressed steel lining structure, using the above-mentioned prestressed steel lining structure, is characterized by: The construction of the concrete body is completed. During the construction of the concrete body, the first prestressed tendons and the second prestressed tendons are anchored at corresponding positions. During the anchoring process of the first prestressed tendons and the second prestressed tendons, rubber sleeves are installed on the first prestressed tendons and the second prestressed tendons. The ribs and the buffer layer are installed on the steel plate, and a first reserved hole and a second reserved hole are made at corresponding positions on the steel plate, wherein the buffer layer is arranged at a position on the steel plate where the ribs are not installed; The embedded pipe is installed on the first prestressed steel bar on the concrete body, and the steel plate is installed on the concrete body so that the first prestressed steel bar extends out of the steel plate through the first reserved hole and the second prestressed steel bar extends out of the steel plate through the second reserved hole; Filling concrete between the concrete body and the steel plate through the first reserved hole, and stopping pouring after the concrete overflows from the second reserved hole; The first anchor head is installed on the first prestressed tendon through threaded engagement and overlapped on the embedded pipe, and the second anchor head is installed on the second prestressed tendon through threaded engagement and overlapped on the reinforcement plate; Weld the first anchor head to the steel plate, weld the second anchor head to the steel plate, and grind off the excess prestressed tendons and anchor heads.
[0013] The present invention provides a prestressed steel lining structure and its construction method. The steel lining structure, composed of prestressed steel bars, steel plates, anchor heads, and a buffer layer, avoids the grouting procedures of traditional steel lining structures, thus avoiding the safety hazards associated with loose grouting. Furthermore, thanks to the buffer layer, the prestressed steel lining structure can effectively withstand negative pressure and vibration during operation, reducing the risk of damage to the concrete beneath the steel lining and ensuring the safety of the steel lining protection area. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 : The structural representation of the present invention.
[0015] Figure 2 : Figure 1 Schematic diagram of AA in the middle.
[0016] Figure 3 : Figure 1 Schematic diagram of the middle BB.
[0017] Figure 4 : Schematic diagram of the installation structure of the second prestressed tendon in the present invention.
[0018] Figure 5 : Schematic diagram of the installation structure of the first prestressed tendon in the present invention.
[0019] Figure 6 : Schematic diagram of the structure of the buffer layer in the present invention.
[0020] In the figure: 1. Concrete body; 2. Steel plate; 2-1. First reserved hole; 2-2. Second reserved hole; 3. Buffer layer; 3-1. Expansion layer; 3-2. Damping layer; 3-3. Adhesive layer; 3-4. Coupling layer; 4. Concrete layer; 5. Rib; 6. First prestressed tendon; 7. First anchor head; 8. Embedded pipe; 9. Second prestressed tendon; 10. Second anchor head; 11. Reinforcement plate; 12. Rubber sleeve. DETAILED DESCRIPTION
[0021] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.
[0022] The first embodiment is a prestressed steel lining structure, which has: A concrete body 1, wherein prestressed tendons are embedded in the concrete body 1 and extend out of the concrete body 1; The steel plate 2 is paved on the concrete body 1. Prestressed holes are formed on the steel plate 2 at positions corresponding to the prestressed tendons. The prestressed tendons can extend out of the concrete body 1 through the reserved holes. The prestressed tendons and the steel plate 2 are connected by a fixed connection structure. A buffer layer 3 is arranged on the side of the steel plate 2 facing the concrete body 1; The concrete layer 4 is formed by solidifying the concrete material that is filled between the steel plate 2 and the concrete body 1 through the reserved holes on the steel plate 2 .
[0023] A rubber sleeve 12 is mounted on the prestressed tendons to separate them from the concrete body 1 and concrete layer 4, allowing them to expand and contract when stressed and to regulate the tendons. The rubber sleeve 12 is positioned at a non-anchored position on the prestressed tendons. Thus, after the steel plate 2 is laid on the concrete body 1, the prestressed tendons on the concrete body 1 pass through the reserved holes in the steel plate 2, and concrete is filled between the steel plate 2 and the preconcrete body 1 through the reserved holes, the prestressed tendons and the pre-steel plate 2 are fixedly connected through the fixed structure. This ensures that the prestressed steel lining structure has good structural strength when local pressure vibrations occur at the tunnel water inlet due to changes in water flow under the action of the prestressed tendon pre-buffer layer 3.
[0024] Example 2 is a prestressed steel lining structure. Based on Example 1, in this embodiment, the buffer layer 3 has an expansion layer 3-1 laid on the steel plate 2 and a damping layer 3-2 laid on the expansion layer 3-1. A bonding layer 3-3 is laid between the expansion layer 3-1 and the steel plate 2 and between the expansion layer 3-1 and the damping layer 3-2. The damping layer 3-2 is made of rubber material, the bonding layer 3-3 is made of industrial flexible bonding material, and the expansion layer 3-1 is made of a 651 type expansion water stop strip.
[0025] A coupling layer 3-4 composed of butter applied on the damping layer 3-2 is laid on the damping layer 3-2. In this way, the expansion layer 3-1 adopts a water-swelling material, and a material with a relatively small water expansion rate can be used to closely fit the gap under the steel lining panel. During the installation and operation of the steel lining, there may be gaps, and the expansion material can fill the gaps in time and maintain the prestress of the steel lining. The damping layer 3-2 adopts rubber material. During the operation of the steel lining structure, it is affected by the vibration of water pressure, forming a corresponding damping area to prevent the steel plate 2 from directly vibrating the concrete area and prevent gradual damage. It also avoids the loss of prestress due to rigid vibration. The coupling layer 3-4 adopts a certain thickness of butter applied to strengthen the fit between the concrete and the damping layer 3-2.
[0026] Example three is a prestressed steel lining structure. Based on Example one, in this embodiment, a rib 5 is fixedly installed on the side of the steel plate 2 facing the concrete body 1. The rib 5 on the steel plate 2 is in a mesh shape as a whole. A first reserved hole 2-1 is made at the intersection of the meshed ribs 5 on the steel plate 2, and a second reserved hole 2-2 is made at the center of the mesh of the mesh rib 5 on the steel plate 2. The prestressed tendon passing through the first reserved hole 2-1 is the first prestressed tendon 6, and the prestressed tendon passing through the second reserved hole 2-2 is the second prestressed tendon 9. The concrete material is filled between the steel plate 2 and the concrete body 1 through the first reserved hole 2-1.
[0027] The end of the first prestressed tendon 6 is threaded, and the fixed connection structure between the first prestressed tendon 6 and the steel plate 2 has a first anchor head 7 that is threadedly matched with the first prestressed tendon 6. A pre-buried pipe 8 is mounted on the first prestressed tendon 6. The first anchor head 7 can extend into the first reserved hole 2-1 and abut against the pre-buried pipe 8. The first anchor head 7 installed on the first prestressed tendon 6 is welded to the steel plate 2.
[0028] The end of the second prestressed tendon 9 is threaded, and the connection structure between the second prestressed tendon 9 and the steel plate 2 has a second anchor head 10 that is threadedly matched with the second prestressed tendon 9. A reinforcement plate 11 is fixedly installed on the side of the steel plate 2 facing the concrete body 1 at the position corresponding to the second reserved hole 2-2. The second anchor head 10 can extend into the second reserved hole 2-2 and abut against the reinforcement plate 11. The second anchor head 10 installed on the second prestressed tendon 9 is welded to the steel plate 2. In this way, the first reserved holes 2-1 are evenly arranged around the second reserved holes 2-2. When concrete is filled between the steel plate 2 and the concrete body 1 through the first reserved holes 2-1, the concrete flows to the second reserved holes 2-2. When concrete overflows from the first reserved holes 2-1, the concrete is evenly filled between the concrete body 1 and the steel plate 2. After concrete pouring is stopped, install the first anchor head 7 onto the first prestressed tendon 6 and tighten it until it overlaps the embedded pipe 8. Install the second anchor head 10 onto the second prestressed tendon 9 and tighten it until it overlaps the reinforcement plate 11. The amount of prestress to be applied and the number of turns required to tighten the anchor heads should be determined in advance through testing, or the tightening force should be determined using a torque wrench. Prestressing should begin at the center of the steel lining, using each mesh rib 5 as a unit, and proceed gradually toward the edges of the steel lining.
[0029] The fourth embodiment is a prestressed steel lining structure, which has: A concrete body 1, wherein prestressed tendons are embedded in the concrete body 1 and extend out of the concrete body 1; The steel plate 2 is paved on the concrete body 1. Prestressed holes are formed on the steel plate 2 at positions corresponding to the prestressed tendons. The prestressed tendons can extend out of the concrete body 1 through the reserved holes. The prestressed tendons and the steel plate 2 are connected by a fixed connection structure. A buffer layer 3 is arranged on the side of the steel plate 2 facing the concrete body 1; The concrete layer 4 is formed by solidifying the concrete material that is filled between the steel plate 2 and the concrete body 1 through the reserved holes on the steel plate 2 .
[0030] The buffer layer 3 includes an expansion layer 3-1 laid on the steel plate 2 and a damping layer 3-2 laid on the expansion layer 3-1. An adhesive layer 3-3 is laid between the expansion layer 3-1 and the steel plate 2 and between the expansion layer 3-1 and the damping layer 3-2. The damping layer 3-2 is made of rubber material, and the adhesive layer 3-3 is made of industrial flexible adhesive material.
[0031] A coupling layer 3-4 consisting of butter applied on the damping layer 3-2 is laid on the damping layer 3-2.
[0032] A rib 5 is fixedly installed on the side of the steel plate 2 facing the concrete body 1. The rib 5 is meshed as a whole on the steel plate 2. A first reserved hole 2-1 is made at the intersection of the meshed ribs 5 on the steel plate 2. A second reserved hole 2-2 is made at the center of the mesh of the meshed rib 5 on the steel plate 2. The prestressed tendons passing through the first reserved holes 2-1 are the first prestressed tendons 6, and the prestressed tendons passing through the second reserved holes 2-2 are the second prestressed tendons 9. Concrete material is filled between the steel plate 2 and the concrete body 1 through the first reserved holes 2-1.
[0033] The end of the first prestressed tendon 6 is threaded, and the fixed connection structure between the first prestressed tendon 6 and the steel plate 2 has a first anchor head 7 that is threadedly matched with the first prestressed tendon 6. A pre-buried pipe 8 is mounted on the first prestressed tendon 6. The first anchor head 7 can extend into the first reserved hole 2-1 and abut against the pre-buried pipe 8. The first anchor head 7 installed on the first prestressed tendon 6 is welded to the steel plate 2.
[0034] The end of the second prestressed tendon 9 is threaded, and the fixed connection structure between the second prestressed tendon 9 and the steel plate 2 has a second anchor head 10 that is threadedly matched with the second prestressed tendon 9. A reinforcement plate 11 is fixedly installed at the corresponding position of the second reserved hole 2-2 on the side of the steel plate 2 facing the concrete body 1. The second anchor head 10 can extend into the second reserved hole 2-2 and abut against the reinforcement plate 11. The second anchor head 10 installed on the second prestressed tendon 9 is welded to the steel plate 2.
[0035] A rubber sleeve 12 is sleeved on the prestressed tendons.
[0036] The construction method of this embodiment is: The construction of the concrete body 1 is completed. During the construction of the concrete body 1, the first prestressed tendons 6 and the second prestressed tendons 9 are anchored at corresponding positions. During the anchoring process of the first prestressed tendons 6 and the second prestressed tendons 9, rubber sleeves 12 are installed on the first prestressed tendons 6 and the second prestressed tendons 9. The ribs 5 and the buffer layer 3 are installed on the steel plate 2, and a first reserved hole 2-1 and a second reserved hole 2-2 are made at corresponding positions on the steel plate 2, wherein the buffer layer 3 is arranged at the position on the steel plate 2 where the ribs 5 are not installed; The embedded pipe 8 is installed on the first prestressed steel bar on the concrete body 1, and the steel plate 2 is installed on the concrete body 1, so that the first prestressed steel bar extends out of the steel plate 2 through the first reserved hole 2-1 and the second prestressed steel bar extends out of the steel plate 2 through the second reserved hole 2-2; Fill the space between the concrete body 1 and the steel plate 2 through the first reserved hole 2-1, and stop pouring when the concrete overflows from the second reserved hole 2-2; The first anchor head 7 is installed on the first prestressed tendon 6 through threaded engagement and overlapped on the embedded pipe 8. The second anchor head 10 is installed on the second prestressed tendon 9 through threaded engagement and overlapped on the reinforcement plate 11. The first anchor head 7 is welded to the steel plate 2, the second anchor head 10 is welded to the steel plate 2, and the redundant prestressed tendons and anchor heads are ground flat.
[0037] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.
Claims
1. A prestressed steel lining structure, characterized by: have: A concrete body (1), wherein prestressed tendons are embedded in the concrete body (1), and the prestressed tendons extend out of the concrete body (1); A steel plate (2) is laid on the concrete body (1), and a reserved hole is formed on the steel plate (2) at a position corresponding to the prestressed tendon. The prestressed tendon can extend out of the concrete body (1) through the reserved hole, and the prestressed tendon and the steel plate (2) are connected by a fixed connection structure; A buffer layer (3) is arranged on the side of the steel plate (2) facing the concrete body (1); The concrete layer (4) is formed by solidifying the concrete material filled between the steel plate (2) and the concrete body (1) through the reserved holes on the steel plate (2).
2. The prestressed steel lining structure according to claim 1, characterized in that: The buffer layer (3) comprises an expansion layer (3-1) laid on a steel plate (2) and a damping layer (3-2) laid on the expansion layer (3-1); an adhesive layer (3-3) is laid between the expansion layer (3-1) and the steel plate (2) and between the expansion layer (3-1) and the damping layer (3-2); the damping layer (3-2) is made of rubber material, and the adhesive layer (3-3) is made of industrial flexible adhesive material.
3. The prestressed steel lining structure according to claim 2, characterized in that: A coupling layer (3-4) composed of butter applied on the damping layer (3-2) is laid on the damping layer (3-2).
4. The prestressed steel lining structure according to claim 1, characterized in that: A rib plate (5) is fixedly mounted on the side of the steel plate (2) facing the concrete body (1). The rib plate (5) on the steel plate (2) is in a mesh shape as a whole. A first reserved hole (2-1) is formed at the intersection of the meshed rib plates (5) on the steel plate (2). A second reserved hole (2-2) is formed at the center of the mesh of the meshed rib plates (5) on the steel plate (2). The prestressed tendons passing through the first reserved hole (2-1) are first prestressed tendons (6), and the prestressed tendons passing through the second reserved hole (2-2) are second prestressed tendons (9). Concrete material is filled between the steel plate (2) and the concrete body (1) through the first reserved hole (2-1).
5. The prestressed steel lining structure according to claim 4, characterized in that: The end of the first prestressed tendon (6) is threaded, and the fixed connection structure between the first prestressed tendon (6) and the steel plate (2) has a first anchor head (7) that is threadedly matched with the first prestressed tendon (6). A pre-buried pipe (8) is mounted on the first prestressed tendon (6), and the first anchor head (7) can be inserted into the first reserved hole (2-1) and abut against the pre-buried pipe (8). The first anchor head (7) installed on the first prestressed tendon (6) is welded to the steel plate (2).
6. The prestressed steel lining structure according to claim 4, characterized in that: The end of the second prestressed tendon (9) is threaded, and the fixed connection structure between the second prestressed tendon (9) and the steel plate (2) has a second anchor head (10) that is threadedly matched with the second prestressed tendon (9). A reinforcement plate (11) is fixedly installed at a position corresponding to the second reserved hole (2-2) on the side of the steel plate (2) facing the concrete body (1). The second anchor head (10) can extend into the second reserved hole (2-2) and abut against the reinforcement plate (11). The second anchor head (10) installed on the second prestressed tendon (9) is welded to the steel plate (2).
7. The prestressed steel lining structure according to claim 1, characterized in that: A rubber sleeve (12) is sleeved on the prestressed tendon.
8. A construction method for a prestressed steel lining structure, using the prestressed steel lining structure according to any one of claims 1 to 7, characterized in that: The construction of the concrete body (1) is completed, and during the construction of the concrete body (1), the first prestressed tendon (6) and the second prestressed tendon (9) are anchored at corresponding positions, and during the anchoring process of the first prestressed tendon (6) and the second prestressed tendon (9), the rubber sleeve (12) is mounted on the first prestressed tendon (6) and the second prestressed tendon (9); The ribs (5) and the buffer layer (3) are mounted on the steel plate (2), and a first reserved hole (2-1) and a second reserved hole (2-2) are formed at corresponding positions on the steel plate (2), wherein the buffer layer (3) is arranged at a position on the steel plate (2) where the ribs (5) are not mounted; A pre-buried pipe (8) is mounted on the first prestressed steel bar on the concrete body (1), and the steel plate (2) is installed on the concrete body (1), so that the first prestressed steel bar extends out of the steel plate (2) through the first reserved hole (2-1), and the second prestressed steel bar extends out of the steel plate (2) through the second reserved hole (2-2); Filling concrete material between the concrete body (1) and the steel plate (2) through the first reserved hole (2-1), and stopping pouring after the concrete material overflows from the second reserved hole (2-2); The first anchor head (7) is installed on the first prestressed tendon (6) through threaded engagement and overlapped on the embedded pipe (8); the second anchor head (10) is installed on the second prestressed tendon (9) through threaded engagement and overlapped on the reinforcement plate (11); The first anchor head (7) is welded to the steel plate (2), the second anchor head (10) is welded to the steel plate (2), and the redundant prestressed tendons and anchor heads are ground flat.