Waterproof structure of tunnel open cut tunnel inverted arch deformation joint
By designing sealing layer, caulking layer, water stop belt and steel bar structure at the deformation joint of the tunnel's clear hole, the problem of water leakage caused by cracking and damage in the deformation joint is solved, and a more durable and safe waterproof effect is achieved.
Patent Information
- Application Number
- CN202421377478.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-17
AI Technical Summary
The deformation joints of the tunnel's open hole arch are prone to cracks, resulting in water leakage, affecting driving safety and durability of the tunnel structure.
A waterproof structure of the tunnel's open-hole arch deformation joint is designed, including a cushion layer, a first pouring section of the open-hole arch and a rear pouring section of the open-hole arch. A sealing layer, a caulking layer, a back-butting rubber water stop belt and a middle buried water stop belt are installed. The steel bars are connected to the pouring sections one after another to reduce settlement and maintain the stability of the structure.
Through multiple barriers and structural stability improvement, the durability of the waterproof structure is significantly improved, ensuring the safety of the tunnel and the long-term stability of the structure.
Smart Images
Figure CN222666880U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tunnel open hole inverted arch construction, in particular to a tunnel open hole inverted arch deformation joint waterproof structure. Background Art
[0002] When high-speed railways are laid in mountainous areas or sensitive urban areas, they have to pass through shallow buried strata due to the influence of terrain and existing ground buildings. When setting up tunnels in shallow buried strata, in order to ensure the safety of tunnel construction and reduce the impact of construction on the surrounding environment, it is usually necessary to adopt an open hole structure.
[0003] The deformation joints of open-cut tunnel inverts are weak spots prone to cracks and are prone to water leakage, which not only directly affects driving safety, but also affects the durability of the tunnel structure, seriously endangering driving safety. Therefore, it is necessary to strengthen the waterproof structure design of the deformation joints of open-cut tunnel inverts. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a waterproof structure for deformation joints of an open-cut tunnel invert arch, which solves the problems mentioned in the above background.
[0005] The utility model provides the following technical scheme: a waterproof structure of a tunnel open-hole inverted arch deformation joint, comprising: a cushion layer, an open-hole inverted arch first-cast section and an open-hole inverted arch post-cast section, the open-hole inverted arch first-cast section and the open-hole inverted arch post-cast section are both arranged on the cushion layer, a deformation joint is formed between the open-hole inverted arch first-cast section and the open-hole inverted arch post-cast section, sealing layers are arranged at both upper and lower ends of the deformation joint, a caulking layer is arranged between the two sealing layers, a back-sticked rubber waterstop is arranged at the bottom of the deformation joint, and an embedded waterstop and steel bars are respectively arranged in the deformation joint.
[0006] Preferably, the two sealing layers are both made of polysulfide sealant, and the filling thickness of the sealing layer in the deformation joint is 3 cm.
[0007] Preferably, the caulking layer is made of waterproof sealant.
[0008] Preferably, the embedded waterstop is a embedded self-adhesive rubber waterstop, the width of the embedded waterstop is 400 mm, the thickness of the embedded waterstop is 10 mm, and both sides of the embedded waterstop extend to the interior of the first cast section of the open hole invert arch and the later cast section of the open hole invert arch respectively.
[0009] Preferably, the width midline of the back-stick rubber waterstop is aligned with the width midline of the deformation joint, the width of the back-stick rubber waterstop is 400 mm, the thickness of the back-stick rubber waterstop is 10 mm, and the convex height of the back-stick rubber waterstop is 40 mm.
[0010] Preferably, the number of the steel bars is two, and the two steel bars are respectively arranged on both sides of the embedded waterstop, and the two steel bars are respectively located at the upper 1 / 3 and the lower 1 / 3 of the deformation joint, and the two ends of the steel bars extend to the interior of the first cast section of the open hole invert arch and the later cast section of the open hole invert arch respectively.
[0011] Preferably, the circumferential spacing between the two steel bars is 50 cm, and the diameter of the steel bars is 50 mm.
[0012] Preferably, the cushion layer is made of C20 concrete, and the thickness of the cushion layer is 10 cm.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] 1. The waterproof structure of the tunnel open-hole inverted arch deformation joint is equipped with a sealing layer, a caulking layer, a back-attached rubber waterstop and a buried waterstop. The sealing layer and the caulking layer fill the deformation joint, and the back-attached rubber waterstop and the buried waterstop provide multiple barriers to water, making the waterproof structure more durable.
[0015] 2. The waterproof structure of the tunnel open-cut inverted arch deformation joint is achieved by setting steel bars, which connect the first cast section of the open-cut inverted arch and the later cast section of the open-cut inverted arch, so as to reduce the settlement on both sides of the inverted arch, maintain the stability of the structure, and ensure the safety and durability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure of the utility model.
[0017] In the figure: 1. cushion layer; 2. first cast section of open hole inverted arch; 3. later cast section of open hole inverted arch; 4. back-bonded rubber waterstop; 5. steel bars; 6. embedded waterstop; 7. sealing layer; 8. caulking layer; 9. expansion joint. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] See also Figure 1The waterproof structure of the tunnel open-cut invert deformation joint comprises: a cushion layer 1, an open-cut invert first cast section 2 and an open-cut invert later cast section 3, the cushion layer 1 is made of C20 concrete, and the thickness of the cushion layer 1 is 10 cm, the open-cut invert first cast section 2 and the open-cut invert later cast section 3 are both arranged on the cushion layer 1, a deformation joint 9 is formed between the open-cut invert first cast section 2 and the open-cut invert later cast section 3, sealing layers 7 are arranged at both upper and lower ends of the deformation joint 9, a caulking layer 8 is arranged between the two sealing layers 7, a back-sticked rubber waterstop 4 is arranged at the bottom of the deformation joint 9, and an embedded waterstop 6 and a steel bar 5 are respectively arranged in the deformation joint 9.
[0020] Both sealing layers 7 are filled with polysulfide sealant, and the filling thickness of the sealing layer 7 in the deformation joint 9 is 3 cm. The polysulfide sealant has excellent properties such as oil resistance and weather resistance, and has a good bonding effect with concrete. The caulking layer 8 is filled with waterproof sealant.
[0021] The embedded waterstop 6 is an embedded self-adhesive rubber waterstop. The width of the embedded waterstop 6 is 400 mm, the thickness of the embedded waterstop 6 is 10 mm, and both sides of the embedded waterstop 6 extend to the interior of the open hole invert arch first cast section 2 and the open hole invert arch later cast section 3 respectively.
[0022] The width midline of the back-sticked rubber waterstop 4 is aligned with the width midline of the deformation joint 9, the width of the back-sticked rubber waterstop 4 is 400 mm, the thickness of the back-sticked rubber waterstop 4 is 10 mm, and the convex height of the back-sticked rubber waterstop 4 is 40 mm.
[0023] There are two steel bars 5, which are respectively arranged on both sides of the buried waterstop 6. The two steel bars 5 are respectively located at the upper 1 / 3 and the lower 1 / 3 of the deformation joint 9, and both ends of the steel bars 5 extend to the interior of the open hole invert arch first cast section 2 and the open hole invert arch post cast section 3 respectively. The circumferential spacing between the two steel bars 5 is 50 cm, and the diameter of the steel bars 5 is 50 mm.
[0024] The two sealing layers 7 seal the two ends of the deformation joint 9 and fill the deformation joint 9 with the caulking layer 8. The back-sticked rubber waterstop 4 and the embedded waterstop 6 provide double water blocking to make the waterproof structure more durable. The steel bars 5 connect the first cast section 2 of the open hole invert arch and the later cast section 3 of the open hole invert arch to reduce the settlement on both sides of the invert arch, maintain the stability of the structure, and ensure the safety and durability of the structure.
[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. The waterproof structure of the tunnel open hole inverted arch deformation joint is characterized by: include: A cushion layer (1), an open hole inverted arch first cast section (2) and an open hole inverted arch later cast section (3), wherein the open hole inverted arch first cast section (2) and the open hole inverted arch later cast section (3) are both arranged on the cushion layer (1), a deformation joint (9) is formed between the open hole inverted arch first cast section (2) and the open hole inverted arch later cast section (3), a sealing layer (7) is arranged at both upper and lower ends of the deformation joint (9), a caulking layer (8) is arranged between the two sealing layers (7), a back-sticking rubber water stop strip (4) is arranged at the bottom of the deformation joint (9), and an embedded water stop strip (6) and a steel bar (5) are respectively arranged in the deformation joint (9).
2. The waterproof structure of tunnel open hole inverted arch deformation joint according to claim 1 is characterized in that: The two sealing layers (7) are both made of polysulfide sealant, and the filling thickness of the sealing layer (7) in the deformation joint (9) is 3 cm.
3. The waterproof structure of tunnel open-hole inverted arch deformation joint according to claim 1 is characterized in that: The caulking layer (8) is made of waterproof sealant.
4. The waterproof structure of tunnel open hole inverted arch deformation joint according to claim 1 is characterized in that: The embedded waterstop (6) is an embedded self-adhesive rubber waterstop, the width of the embedded waterstop (6) is 400 mm, the thickness of the embedded waterstop (6) is 10 mm, and the two sides of the embedded waterstop (6) extend to the interior of the open hole invert arch first cast section (2) and the open hole invert arch post cast section (3) respectively.
5. The waterproof structure of tunnel open hole inverted arch deformation joint according to claim 1 is characterized in that: The width midline of the back-stick rubber waterstop (4) is aligned with the width midline of the deformation joint (9), the width of the back-stick rubber waterstop (4) is 400 mm, the thickness of the back-stick rubber waterstop (4) is 10 mm, and the convex height of the back-stick rubber waterstop (4) is 40 mm.
6. The waterproof structure of tunnel open hole inverted arch deformation joint according to claim 1 is characterized in that: The number of the steel bars (5) is two, and the two steel bars (5) are respectively arranged on both sides of the embedded water stop (6), and the two steel bars (5) are respectively located at the upper 1 / 3 of the deformation joint (9) and the lower 1 / 3 of the deformation joint (9), and the two ends of the steel bars (5) extend to the inside of the open hole invert arch first cast section (2) and the open hole invert arch post cast section (3).
7. The waterproof structure of tunnel open hole inverted arch deformation joint according to claim 6 is characterized in that: The circumferential spacing between the two steel bars (5) is 50 cm, and the diameter of the steel bars (5) is 50 mm.
8. The waterproof structure of tunnel open hole inverted arch deformation joint according to claim 1 is characterized in that: The cushion layer (1) is made by pouring C20 concrete, and the thickness of the cushion layer (1) is 10 cm.