Urban rail underground excavation tunnel construction joint waterproof structure
By using a combined structure of water stops, support members and restriction components in the construction joints of urban rail concealed tunnels, combining expansion rubber strips and cement-based permeable crystal coating layers, the water leakage problem caused by inaccurate positioning of water stops in the construction joint is solved. , significantly improves the waterproof effect of the tunnel.
Patent Information
- Application Number
- CN202420094053.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-15
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-01-15
AI Technical Summary
The water stop belts in the construction joints of the urban rail tunnel are prone to inaccurate positioning and insolidity during the installation process, resulting in later leakage and affecting the waterproofing effect of the tunnel.
Using a combined structure of water stop belt, support member and restriction component, the water stop belt bent into a "V" shape under the cooperation of support member and restriction component, combining the expanded rubber strip and cement-based permeable crystal coating layer to enhance the waterproofing of the construction joints. performance.
It effectively reduces the displacement of the water stop belt during concrete construction, improves the waterproofing effect, increases the difficulty of water penetration, and significantly improves the waterproof performance of construction joints.
Smart Images
Figure CN222276684U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of tunnel construction waterproofing, and in particular to a waterproofing structure for construction joints of urban rail dark-cut tunnels. Background Art
[0002] Urban rails are mostly designed as tunnel underpass structures in railway stations. Taking a certain project as an example, the backfill on the top of the tunnel is made of Group A materials (Group A fillers are crushed stone soil and gravel soil with good gradation and fine particle content less than 15%). The backfill body composed of this material has good water permeability and has high requirements for tunnel waterproofing and drainage construction. However, tunnel leakage is a common quality problem of the project. One of the reasons is that the water stop belt of the construction joint is often inaccurately positioned and not firm during installation, resulting in water leakage in the later stage. Therefore, this application proposes a new technical solution. Utility Model Content
[0003] In order to improve the waterproofing ability of construction joints, the present application provides a waterproofing structure for construction joints of urban rail dark-cut tunnels.
[0004] The present application provides a waterproof structure for construction joints of urban rail tunnels, which adopts the following technical solutions:
[0005] A waterproof structure for construction joints of an urban rail dark-excavated tunnel, comprising:
[0006] The water stop has a length extending along the length direction of the construction joint and a width extending across the construction joint to the structure and extending on both sides to the two structures forming the construction joint;
[0007] The supporting member extends along the length of the construction joint and is located on the side of the water stop close to the structural reinforcement;
[0008] An expansion strip, which is located in the direction of the water stop away from the supporting member and has a side contacting the construction joint;
[0009] There are multiple support members, which are distributed along the length direction of the construction joint. The support members are fixed on the steel mesh of the structure forming the construction joint. A limiting component is movably connected to the support member. The limiting components are arranged in pairs on the support members and the two limiting components of the same pair are respectively located on both sides of the waterstop. The width between the two limiting components of the same pair is smaller than the width of the waterstop when it is unfolded. The width of the waterstop hits the support member in the middle and is far away from the support member on both sides. The limiting component is connected to the edge of the waterstop.
[0010] Optionally, the supporting member includes an angle steel, which is L-shaped with an inner angle facing one side of the waterstop.
[0011] Optionally, the limiting assembly includes a screw, a nut and a chuck, the screw penetrates the corner of the angle steel and is threadedly connected to a section inside / outside the angle steel with a nut, the chuck is fixed to a section of the screw located inside the angle steel and is formed with a clamp, and the width of the water stop extends laterally into the clamp of the chuck.
[0012] Optionally, the waterstop includes a rubber body located in the middle and hard side plates located on both sides of the width of the rubber body, the edge of the rubber body wraps the edge of the hard side plate, and the thickness of the connecting section between the rubber body and the hard side plate is greater than that of the non-connecting section.
[0013] Optionally, the board surface of the hard side board is provided with a plurality of water stop grooves, and the plurality of water stop grooves are arranged along the width direction of the hard side board.
[0014] Optionally, the hard side plate forms an angle with the supporting member and the angle ranges from 15° to 30°.
[0015] Optionally, it also includes a cement-based penetrating crystallization coating layer, wherein the cement-based penetrating crystallization coating layer is formed in the construction joint.
[0016] Optionally, a pull rope is provided between the screw rods of the two limiting assemblies of the same pair, the pull rope is located on the side of the water stop away from the supporting member, and the expansion rubber strip is fixed to the pull rope.
[0017] To summarize, the present application includes at least one of the following beneficial technical effects: the waterstop is positioned with the cooperation of the supporting structure and the limiting assembly, and is bent into a "V"-shaped structure, so on the one hand, the deterioration of the waterproof effect caused by the displacement of the waterstop during concrete construction can be reduced; on the other hand, the curved surface of the waterstop makes it more difficult for water to penetrate along the construction joint, so that this structure can be used to improve the waterproof effect of the construction joint. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the present invention.
[0019] Explanation of the reference numerals: 1. water stop; 11. rubber body; 12. hard side plate; 2. supporting member; 3. expansion rubber strip; 4. limiting assembly; 41. screw; 42. nut; 43. chuck; 44. pull rope. DETAILED DESCRIPTION
[0020] The following is combined with Figure 1 This application is described in further detail.
[0021] The embodiment of the present application discloses a waterproof structure for construction joints of a dark-cut tunnel for urban rail transit.
[0022] Reference Figure 1The waterproof structure of the construction joint of the urban rail dark-excavated tunnel includes: a waterstop 1, a supporting member 2 and an expansion rubber strip 3.
[0023] The water stop 1 extends along the length direction of the construction joint and its width spans the construction joint, with the two sides respectively extending to the two structures forming the construction joint, so as to achieve the purpose of sealing the construction joint from the depth direction of the construction joint for waterproofing.
[0024] In this embodiment, the water stop 1 is cast in the concrete structure, steel bars are laid in the structure forming the construction joint, and the side of the structure facing away from the tunnel cavity is the water-facing side.
[0025] The supporting member 2 includes angle steel. The advantages of choosing angle steel are: 1) it is relatively difficult to deform when the steel structure of the structure connecting the construction joint is poured, so as to ensure the supporting effect of the water stop 1; 2) the angle steel is L-shaped, and when the inner corner faces the water stop 1, two fulcrums are provided at both ends, and the support is more stable.
[0026] The length direction of the supporting member 2 is parallel to the width direction of the construction joint, and is located on the side of the waterstop 1 close to the structural steel bars, that is, the supporting member 2 is fixed to the structural steel bars by binding with wire or the like, and the waterstop 1 falls on the supporting member 2.
[0027] Since the water stop strip 1 is relatively long, there are multiple supporting members 2, and the multiple supporting members 2 are arranged along the length direction of the construction joint.
[0028] A limiting component 4 is movably connected to the supporting member 2. The limiting components 4 are arranged in pairs on the supporting member 2 and the two limiting components of the same pair are respectively located on both sides of the waterstop 1. The width between the two limiting components 4 of the same pair is smaller than the width of the waterstop 1 when it is unfolded. The width of the waterstop 1 touches the supporting member 2 in the middle and is away from the supporting member 2 on both sides. The limiting components 4 are connected to the edge of the waterstop 1.
[0029] According to the above arrangement, the waterstop 1 is positioned with the cooperation of the supporting member 2 and the limiting component 4, and is bent into a "V"-shaped structure. Therefore, on the one hand, the deterioration of the waterproof effect caused by the displacement of the waterstop 1 during the concrete construction process can be reduced; on the other hand, the curved surface of the waterstop makes it more difficult for water to penetrate along the construction joint, so that this structure can be used to improve the waterproof effect of the construction joint.
[0030] Reference Figure 1 The limiting assembly 4 includes a screw 41, a nut 42 and a clamp 43. The screw 41 penetrates the corner of the angle steel and is threadedly connected with nuts 42 on a section located inside / outside the angle steel, that is, after the screw 41 penetrates the angle steel, the two ends are connected with nuts 42 respectively, and the positioning and fixing is realized by a double nut structure.
[0031] The clamp 43 can be welded or formed on a section of the screw 41 located inside the angle steel. The clamp 43 is block-shaped and has a clamping opening. The width of the water stop 1 extends laterally into the clamping opening of the clamp 43.
[0032] According to the above, when the waterstop 1 is squeezed by the limiting components 4 on both sides, the two side edges are clamped and fixed with the clamps 43, so the installation operation is relatively simple; and because the screw 41 is fixed with the nut 42, its length inside / outside the angle steel is adjustable, that is, the position of the clamp 43 relative to the angle steel is adjustable, so that the limiting component 4 can meet the use requirements when the waterstop 1 is squeezed to form different angles.
[0033] Reference Figure 1 The water stop strip 1 includes a rubber body 11 located in the middle and hard side plates 12 located on both sides of the rubber body 11 in the width direction.
[0034] The hard side plate 12 may be a metal plate. The edge of the rubber body 11 wraps the edge of the hard side plate 12 , and the thickness of the connecting section between the rubber body and the hard side plate is greater than that of the non-connecting section.
[0035] According to the above arrangement, firstly, the construction joint is located at the rubber body 11, so the influence of thermal expansion and contraction of the structure on the change of the width of the construction joint will not affect the waterproof effect of the waterstop 1, because the middle part thereof can be deformed; secondly, what is connected to the above-mentioned clamp 43 at this time is the hard side plate 12, so the clamping effect is better; finally, because the thickness of the connection part between the rubber body 11 and the hard side plate 12 is larger, it can further hinder water from penetrating along the surface of the waterstop 1.
[0036] Furthermore, a plurality of water stop grooves are provided on the plate surface of the hard side plate 12, and the plurality of water stop grooves are arranged along the width direction of the hard side plate 12. This arrangement is to increase the connection strength between the water stop strip 1 and the concrete of the structure.
[0037] In one embodiment, the hard edge plate 12 forms an angle with the supporting member 2 and the angle ranges from 15° to 30°, which not only ensures the span width of the waterstop 1 but also forms a "V" structure to enhance the waterproof effect.
[0038] It also includes a cement-based penetrating crystallization coating layer, which is formed in the construction joint; the cement-based penetrating crystallization waterproof coating is a powdered rigid waterproof material made of silicate cement, selected quartz sand, special active chemicals, etc. It is a gray powder material, and its waterproof mechanism is to use water as a carrier, and through the guidance of water, with the help of strong permeability, it is transmitted and filled in the micropores and capillaries of the concrete, and a physical and chemical reaction occurs to form water-insoluble dendrite-like crystals; it is formed by applying it to the upper mouth of the construction joint and penetrating downward, and is used to further waterproof the construction joint.
[0039] In the present application, in order to improve the waterproof effect, an expansion strip 3 is also arranged, which is located in the direction of the water stop 1 away from the supporting member 2 and contacts the construction joint on the side. The expansion strip 3 can be a water-swellable rubber, and its length extends along the length direction of the construction joint.
[0040] In order to install the expansion strip 3, in addition to being lowered and fixed on the formwork structure at the construction joint position during pouring, the above structure can also be set as follows:
[0041] A pull rope 44 is arranged between the screw rods 41 of the two limiting components 4 of the same pair. The pull rope 44 is located on the side of the water stop 1 away from the supporting member 2. The expansion strip 3 is fixed to the pull rope 44. For example, the pull ropes 44 penetrate the expansion strip 3 to make it suspended in the air and placed in a suitable position.
[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A waterproof structure for construction joints of urban rail tunnels, characterized in that: include: The water stop (1) has a length extending along the length direction of the construction joint, and a width extending across the construction joint to the structure, and extending on both sides to two structures forming the construction joint; A supporting member (2) extending in the length direction of the construction joint and located on a side of the water stop strip (1) close to the structural reinforcement; An expansion rubber strip (3), which is located in the direction of the water stop strip (1) away from the supporting member (2) and has a side contacting the construction joint; There are a plurality of support members (2), and the plurality of support members (2) are distributed along the length direction of the construction joint. The support member (2) is fixed on a steel mesh frame of a structure forming the construction joint. A limiting component (4) is movably connected to the support member (2). The limiting components (4) are arranged in pairs on the support member (2), and the two limiting components (4) of the same pair are respectively located on both sides of the waterstop (1). The width between the two limiting components (4) of the same pair is smaller than the width of the waterstop (1) when it is unfolded. The width of the waterstop (1) contacts the support member (2) toward the middle and is away from the support member (2) on both sides. The limiting component (4) is connected to the edge of the waterstop (1).
2. The waterproof structure for construction joints of urban rail tunnels according to claim 1 is characterized in that: The supporting member (2) comprises an angle steel, which is L-shaped and has an inner angle facing one side of the water stop strip (1).
3. The waterproof structure for construction joints of urban rail tunnels according to claim 2 is characterized in that: The limiting assembly (4) comprises a screw rod (41), a nut (42) and a clamp (43); the screw rod (41) penetrates the corner of the angle steel and is located inside / outside the angle steel and is threadedly connected to a nut (42) respectively; the clamp (43) is fixed to a section of the screw rod (41) located inside the angle steel and is formed with a clamp; the width of the water stop strip (1) extends to the side into the clamp of the clamp (43).
4. The waterproof structure for construction joints of urban rail tunnels according to claim 1 is characterized in that: The water stop strip (1) comprises a rubber body (11) located in the middle and hard side plates (12) located on both sides of the rubber body (11) in a width direction, the edge of the rubber body (11) wraps around the edge of the hard side plate (12), and the thickness of the connecting section between the rubber body (11) and the hard side plate (12) is greater than that of the non-connecting section.
5. The waterproof structure for construction joints of urban rail tunnels according to claim 4 is characterized in that: The plate surface of the hard side plate (12) is provided with a plurality of water stop grooves, and the plurality of water stop grooves are arranged along the width direction of the hard side plate (12).
6. The waterproof structure for construction joints of urban rail dark-digging tunnels according to claim 4 is characterized by: The hard side plate (12) and the supporting member (2) form an angle, and the angle ranges from 15° to 30°.
7. The waterproof structure for construction joints of urban rail tunnels according to claim 1 is characterized in that: It also includes a cement-based penetrating crystallization coating layer, which is formed in the construction joint.
8. The waterproof structure for construction joints of urban rail tunnels according to claim 3 is characterized by: A pull rope (44) is provided between the screw rods (41) of the two limiting assemblies (4) of the same pair. The pull rope (44) is located on a side of the water stop (1) away from the supporting member (2), and the expansion rubber strip (3) is fixed to the pull rope (44).