A tunnel arch anti-buoyancy device and anti-buoyancy structure
By using anti-floating devices with anti-floating pipes and anti-floating ribs in tunnel construction, the problems of high cost, high construction difficulty and low durability of traditional rebars are solved, and the effect of reducing material and construction costs and improving durability and stability is achieved.
Patent Information
- Application Number
- CN202421555832.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During tunnel construction, traditional rebars have high cost, high construction difficulty and low durability, especially in complex geological environments.
A tunnel arch anti-floating device is adopted, including an anti-floating tube and an anti-floating bar. The outer wall of the anti-floating tube is provided with grouting holes, and the anti-floating bars are welded to the outer wall of the anti-floating tube and grouting is applied in the anti-floating tube to combine with the soil layer.
It significantly reduces the material and construction costs, has strong adaptability and low construction difficulty, and improves the durability and long-term stability of the anti-floating device.
Smart Images
Figure CN222731553U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of tunnel construction, and in particular to a tunnel invert anti-floating device and an anti-floating structure. Background Art
[0002] The inverted arch is a reverse arch structure set at the bottom of the tunnel to improve the stress conditions of the upper supporting structure. It is one of the main components of the tunnel structure. The inverted arch not only effectively transfers the stratum pressure above the tunnel to the underground through the tunnel side wall structure or the load on the road surface, but also effectively resists the reaction force from the lower stratum of the tunnel. In tunnel construction, anti-floating anchor rods are often constructed to increase the anti-floating ability of the inverted arch. At present, the anti-floating anchor rods are often made of threaded steel.
[0003] Rebar provides the necessary support and stability for the invert with its high tensile strength, but it has certain limitations: 1. The cost of rebar is relatively high, and the large-scale use of rebar increases the cost of tunnel construction; 2. The construction of rebar has certain requirements on geological conditions. In some complex geological environments, the construction is difficult and the construction cost is high; 3. Rebar is in the underground environment for a long time and is easily affected by groundwater erosion, which affects its durability to a certain extent. Utility Model Content
[0004] The purpose of the present application is to provide a tunnel invert anti-floating device and an anti-floating structure to solve the problem of high tunnel construction costs.
[0005] The technical solution adopted by the present application to solve its technical problem is: a tunnel invert anti-floating device, including an anti-floating tube with at least one end open and anti-floating ribs fixed on the outer wall of the anti-floating tube, and the outer wall of the anti-floating tube is provided with grouting holes connected with its inner cavity.
[0006] Furthermore, a plurality of groups of anti-floating ribs are fixed on the outer wall of the anti-floating tube along its axial direction, and each group of anti-floating ribs includes at least two ribs evenly distributed along the circumference of the anti-floating tube.
[0007] Furthermore, the distance between two adjacent groups of the anti-floating ribs is 250 mm to 350 mm.
[0008] Furthermore, the anti-floating ribs include a connecting section and reinforcing sections fixed at both ends of the connecting section, and the connecting section is arranged along the axial direction of the anti-floating tube and is fixedly connected to the anti-floating tube.
[0009] Furthermore, the anti-floating reinforcement is formed by bending steel bars.
[0010] Furthermore, a plurality of groups of grouting holes are arranged on the outer wall of the anti-floating tube along its axial direction, and each group of grouting holes includes at least two grouting holes evenly distributed along the circumference of the anti-floating tube.
[0011] Furthermore, a water-stop steel plate is welded on the anti-floating tube.
[0012] Furthermore, an anti-rust layer is provided on the outer wall of the anti-floating tube.
[0013] A tunnel invert anti-floating structure comprises an invert and a tunnel invert anti-floating device, wherein the upper end of the anti-floating pipe is arranged in the invert, and the lower end of the anti-floating pipe is arranged in the soil layer below the invert, and the anti-floating pipe is filled with a grouting body, and the grouting body is combined with the soil layer below the invert through the grouting hole.
[0014] Furthermore, the anti-floating ribs on the anti-floating tube are fixedly connected to the inverted arch reinforcement bars in the inverted arch.
[0015] Beneficial effects of this application:
[0016] 1. The tunnel invert anti-floating device and anti-floating structure provided in the embodiments of the present application are used to transfer the buoyancy of the invert to the deep stable soil. Compared with traditional threaded steel bars, the use of anti-floating pipes can significantly reduce material costs and construction costs.
[0017] 2. The tunnel invert anti-floating device and anti-floating structure provided in the embodiments of the present application and the construction of the anti-floating pipe are more adaptable to different geological conditions, can provide stable support in a variable geological environment, have low construction difficulty and low construction cost.
[0018] 3. The tunnel invert anti-floating device and anti-floating structure provided in the embodiments of the present application are characterized in that the anti-floating tube is filled with grouting to form a grouting body, and the grouting body is tightly combined with the soil layer through the grouting holes to form a more uniform and stable supporting structure, thereby improving the durability and long-term stability of the anti-floating device. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 It is a structural schematic diagram of a tunnel invert anti-floating device provided in an embodiment of the present application;
[0021] Figure 2 is a schematic diagram of a tunnel invert anti-floating structure provided in an embodiment of the present application;
[0022] Figure 3 It is a structural schematic diagram of the connection between the anti-floating pipe and the invert arch.
[0023] Reference numerals:
[0024] 1- Anti-floating tube;
[0025] 11- Grouting hole;
[0026] 2- Anti-floating ribs;
[0027] 21-connecting section;
[0028] 22-Reinforcement section;
[0029] 3- Waterstop steel plate;
[0030] 4- inverted arch;
[0031] 41- Arch reinforcement. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.
[0033] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the embodiments and features in the embodiments of this application can be combined with each other without conflict.
[0034] In the description of the embodiments of the present application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or is the orientation or positional relationship in which the product of the application is usually placed when in use, or is the orientation or positional relationship commonly understood by those skilled in the art. The terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, and an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements.
[0035] See also Figure 1 An anti-floating device for a tunnel invert provided in an embodiment of the present application comprises an anti-floating tube 1 with at least one end open and anti-floating ribs 2 fixed on the outer wall of the anti-floating tube 1, and a grouting hole 11 communicating with the inner cavity of the anti-floating tube 1 is arranged on the outer wall of the anti-floating tube 1.
[0036] Exemplarily, the anti-floating tube 1 is made of a steel tube, and the anti-floating tube 1 can be a structure with one end open or a structure with two ends open. For example, the anti-floating tube 1 is made of a steel tube with an outer diameter of φ42. During construction, the upper end of the anti-floating tube 1 is used to connect with the invert 4, and the lower end of the anti-floating tube 1 is used to penetrate into the stable underground soil layer, so that the friction between the anti-floating tube 1 and the surrounding soil can be used to transfer the buoyancy of the invert 4 to the stable underground soil, thereby balancing the buoyancy of the groundwater and playing a role in resisting the floating of the invert 4. The anti-floating ribs 2 are welded to the outer wall of the anti-floating tube 1, and are used to improve the bonding force between the anti-floating tube 1 and the surrounding rock and soil, so as to more effectively play the anti-floating role of the anti-floating tube 1. A grouting hole 11 is provided on the outer wall of the anti-floating tube 1, so that the anti-floating tube 1 can be used as a grouting pipe. During construction, grouting can be injected into the anti-floating tube 1 from the open end of the anti-floating tube 1. The slurry is tightly combined with the soil around the anti-floating tube 1 through the grouting hole 11. After the slurry solidifies, a stable supporting structure is formed, which further improves the anti-floating effect of the anti-floating tube 1.
[0037] The embodiment of the present application provides a tunnel invert anti-floating device, which is used to transfer the buoyancy of the invert to a deep stable soil body, so as to resist the floating of the invert 4. Compared with the traditional solid structure of threaded steel, the use of the hollow structure anti-floating tube 1 can significantly reduce the material cost and construction cost; the construction of the anti-floating tube 1 is more adaptable to different geological conditions, and can provide stable support in a variable geological environment, with low construction difficulty and low construction cost; the anti-floating reinforcement 2 is fixed to the outer wall of the anti-floating tube 1, which improves the adhesion between the anti-floating tube 1 and the surrounding soil body, and further improves the anti-floating effect of the anti-floating tube 1; the anti-floating tube 1 is filled by grouting to form a grouting body, and the grouting body is tightly combined with the soil layer through the grouting hole 11 to form a more uniform and stable support structure, which not only reduces the influence of groundwater erosion on it, but also improves the durability and long-term stability of the anti-floating device, and can disperse the weight and buoyancy of the invert to a larger range of soil, thereby maintaining the stability and safety of the invert.
[0038] In some embodiments, see Figure 1 , multiple groups of anti-floating ribs 2 are fixed on the outer wall of the anti-floating tube 1 along its axial direction, and each group of anti-floating ribs 2 includes at least two groups uniformly arranged along the circumference of the anti-floating tube 1. Among them, multiple groups are at least two groups, and by setting multiple groups of anti-floating ribs 2, the adhesion between the anti-floating tube 1 and the surrounding soil is further improved, thereby improving the anti-floating effect of the anti-floating tube 1. Exemplarily, the distance between two adjacent groups of anti-floating ribs 2 is 250mm to 350mm.
[0039] In some embodiments, the anti-floating reinforcement 2 includes a connecting section 21 and a reinforcing section 22 fixed at both ends of the connecting section 21. The connecting section 21 is arranged along the axial direction of the anti-floating tube 1 and is fixedly connected to the anti-floating tube 1, so that the anti-floating reinforcement 2 is roughly U-shaped. Exemplarily, the connecting section 21 and the reinforcing section 22 can be welded or integrally formed. For example, the anti-floating reinforcement 2 is formed by bending φ8mm steel bars. Of course, in other embodiments, the anti-floating reinforcement 2 can also be other structures such as a straight line or a Y shape, which is not specifically limited here.
[0040] In some embodiments, see Figure 1 , multiple groups of grouting holes 11 are arranged on the outer wall of the anti-floating tube 1 along its axial direction, and each group of grouting holes 11 includes at least two holes evenly distributed along the circumference of the anti-floating tube 1. During grouting, the slurry can be evenly combined with the soil around the anti-floating tube 1 along the axial direction and circumferential direction of the anti-floating tube 1 to form a more uniform and stable support structure, further improving the durability and long-term stability of the anti-floating device. Exemplarily, the distance between two adjacent groups of grouting holes 11 is 200mm to 300mm, and the diameter of each grouting hole 11 is φ8mm.
[0041] In order to improve the waterproof performance of the anti-floating tube 1 at the junction with the underground rock layer, a water-stop steel plate 3 is welded on the anti-floating tube 1. In order to improve the anti-corrosion performance of the anti-floating tube 1, an anti-rust layer is provided on the outer wall of the anti-floating tube 1. The anti-rust layer may include anti-rust paint applied on the outer wall of the outer surface of the anti-floating tube 1.
[0042] See also Figure 2 An embodiment of the present application provides a tunnel invert anti-floating structure, including an invert 4 and a tunnel invert anti-floating device, wherein the upper end of an anti-floating pipe 1 is arranged in the invert 4, and the lower end of the anti-floating pipe 1 is arranged in the soil layer below the invert 4. The anti-floating pipe 1 is filled with grouting, and the grouting is combined with the soil layer below the invert 4 through a grouting hole 11.
[0043] The embodiment of the present application provides a tunnel invert anti-floating structure, and the specific construction process is: first determine the construction position of the anti-floating pipe 1 at the construction site, then drill a hole at each construction position and install the anti-floating pipe 1 in the hole, after adjusting the installation height of the anti-floating pipe 1, inject slurry into the anti-floating pipe 1 from the upper end opening of the anti-floating pipe 1, the slurry is filled in the space between the anti-floating pipe 1 and the hole wall through the grouting hole 11, and a grouting body is formed after the slurry solidifies. The grouting body tightly combines the anti-floating pipe 1 with the soil around it to form a stable supporting structure.
[0044] The embodiment of the present application provides a tunnel invert anti-floating structure. Compared with the traditional solid structure of threaded steel, the use of the hollow structure anti-floating tube 1 can significantly reduce the material cost and construction cost; the construction of the anti-floating tube 1 is more adaptable to different geological conditions, can provide stable support in a changeable geological environment, has low construction difficulty and low construction cost; the anti-floating reinforcement 2 is fixed to the outer wall of the anti-floating tube 1, which improves the adhesion between the anti-floating tube 1 and the surrounding soil, and further improves the anti-floating effect of the anti-floating tube 1; the anti-floating tube 1 is filled by grouting to form a grouting body, and the grouting body is tightly combined with the soil layer through the grouting hole 11 to form a more uniform and stable support structure, which reduces the influence of groundwater erosion on it and improves the durability and long-term stability of the anti-floating device.
[0045] In order to further improve the firmness of the connection between the anti-floating tube 1 and the inverted arch 4, the anti-floating ribs 2 on the anti-floating tube 1 are fixedly connected to the inverted arch reinforcement 41 in the inverted arch 4. Figure 3 The inverted arch 4 includes a primary lining inverted arch 42 and a secondary lining inverted arch 43 located above the primary lining inverted arch 42. The anti-floating reinforcement 2 at the upper end of the anti-floating tube 1 is fixedly connected to the inverted arch reinforcement 41 in the secondary lining inverted arch 43. The water stop steel plate 3 can be arranged in the primary lining inverted arch 42 or in the secondary lining inverted arch 43.
[0046] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Based on the technical essence of the present application and within the spirit and principles of the present application, any simple modification, equivalent replacement and improvement of the above embodiments shall still fall within the protection scope of the technical solution of the present application.
Claims
1. A tunnel invert anti-floating device, characterized in that: It comprises an anti-floating tube (1) with at least one end open and anti-floating ribs (2) fixed on the outer wall of the anti-floating tube (1); the outer wall of the anti-floating tube (1) is provided with a grouting hole (11) communicating with its inner cavity.
2. The tunnel invert anti-floating device according to claim 1, characterized in that: A plurality of groups of anti-floating ribs (2) are fixed on the outer wall of the anti-floating tube (1) along its axial direction, and each group of anti-floating ribs (2) comprises at least two ribs evenly distributed along the circumference of the anti-floating tube (1).
3. The tunnel invert anti-floating device according to claim 2, characterized in that: The distance between two adjacent groups of anti-floating ribs (2) is 250 mm to 350 mm.
4. The tunnel invert anti-floating device according to claim 1, 2 or 3, characterized in that: The anti-floating rib (2) comprises a connecting section (21) and reinforcing sections (22) fixed at both ends of the connecting section (21); the connecting section (21) is arranged along the axial direction of the anti-floating tube (1) and is fixedly connected to the anti-floating tube (1).
5. The tunnel invert anti-floating device according to claim 4, characterized in that: The anti-floating reinforcement (2) is formed by bending steel bars.
6. The tunnel invert anti-floating device according to claim 1, characterized in that: A plurality of groups of grouting holes (11) are arranged on the outer wall of the anti-floating pipe (1) along its axial direction, and each group of grouting holes (11) includes at least two grouting holes evenly distributed along the circumference of the anti-floating pipe (1).
7. The tunnel invert anti-floating device according to claim 1, characterized in that: A water-stop steel plate (3) is welded to the anti-floating pipe (1).
8. The tunnel invert anti-floating device according to claim 1, characterized in that: An anti-rust layer is provided on the outer wall of the anti-floating tube (1).
9. A tunnel invert anti-floating structure, characterized in that: The invention comprises an inverted arch (4) and a tunnel inverted arch anti-floating device according to any one of claims 1 to 8, wherein the upper end of the anti-floating pipe (1) is arranged in the inverted arch (4), the lower end of the anti-floating pipe (1) is arranged in the soil layer below the inverted arch (4), the anti-floating pipe (1) is filled with a grouting body, and the grouting body is combined with the soil layer below the inverted arch (4) through the grouting hole (11).
10. The tunnel invert anti-floating structure according to claim 9, characterized in that: The anti-floating ribs (2) on the anti-floating tube (1) are fixedly connected to the inverted arch reinforcement (41) in the inverted arch (4).