Tunnel waterproof and drainage structure
By using water-expanding waterstops and sealing components in the tunnel drainage structure, the density problem when connecting the transverse drainage pipes and the prefabricated central drainage ditch during tunnel construction was solved, achieving stable connection and efficient construction.
Patent Information
- Application Number
- CN202423250831.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-12-27
AI Technical Summary
During tunnel construction, when the transverse drainage pipe is connected to the prefabricated central drainage ditch, it is difficult to fill the narrow space with concrete, making it difficult to ensure uniform density, which affects the stability of the connection.
Water-expanding waterstop strips and sealing components are used, fine stone concrete is injected through the grouting pipe, and the water-expanding waterstop strips expand to fill the gaps, ensuring the stability of the connection between the horizontal drainage pipe and the prefabricated central drainage ditch.
The density of the concrete filling is completely uniform, which ensures the connection stability between the horizontal drainage pipe and the prefabricated central drainage ditch and improves the construction efficiency and quality.
Smart Images
Figure CN223434388U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of tunnel waterproof and drainage, specifically relates to a tunnel waterproof and drainage structure. BACKGROUND
[0002] After building a tunnel, the original water system balance of the mountain is destroyed, and the tunnel becomes a channel for groundwater to gather near the mountain. When the tunnel is connected with the water-bearing stratum, and the waterproof and drainage facilities and methods of the lining are imperfect, tunnel water damage will inevitably occur.
[0003] Tunnel leakage is harmful, difficult to regulate, and high in cost, so it is very important to do a good job of tunnel waterproof and drainage, which can prevent problems from occurring and achieve a multiplier effect.
[0004] At present, in order to improve the construction efficiency and reduce the construction period, the central drainage ditch in the tunnel will use a factory-prepared central drainage ditch for on-site splicing.
[0005] When connecting the transverse drainage pipe with the prefabricated central drainage ditch, the transverse drainage pipe is usually inserted into the reserved hole, and then fine aggregate concrete is filled into the gap between the transverse drainage pipe and the reserved hole from one side. Because the gap between the prefabricated central drainage ditch and the trench is limited, it is difficult for workers to perform concrete filling work in a narrow space, and it is difficult to ensure that the filling density is completely uniform, which may cause voids or cavities, and the construction quality is difficult to guarantee. INVENTION CONTENTS
[0006] In view of the problem that when connecting the transverse drainage pipe with the prefabricated central drainage ditch, the gap between the prefabricated central drainage ditch and the trench is limited, and it is difficult for workers to perform concrete filling work in a narrow space, and it is difficult to ensure that the filling density is completely uniform, the utility model provides a tunnel waterproof and drainage structure.
[0007] The utility model solves the technical problems and adopts the scheme that a tunnel waterproof and drainage structure, including initial support layer, secondary lining layer, N parallel setting's annular drainage blind pipe, M parallel setting's longitudinal drainage pipe and located in the prefabricated central drainage ditch of tunnel bottom center, initial support layer sets up in the inside of tunnel excavation face, secondary lining layer is located inside initial support layer;
[0008] Annular drainage blind pipe sets up between initial support layer and secondary lining layer, longitudinal drainage pipe sets up in the tunnel side wall position and is connected with the bottom end of annular drainage blind pipe, prefabricated central drainage ditch and longitudinal drainage pipe between setting has transverse drainage pipe, one end of transverse drainage pipe and longitudinal drainage pipe are connected,
[0009] The left and right side walls of the prefabricated central drainage ditch are respectively provided with a reserved hole, the top of the reserved hole is provided with a grouting pipe, the lower end of the grouting pipe is communicated with the reserved hole, and the upper end of the grouting pipe extends to the top of the prefabricated central drainage ditch;
[0010] The reserved hole is provided with a water-swelling sealing strip, the other end of the transverse drainage pipe extends into the reserved hole and is in contact with the water-swelling sealing strip, and a gap for pouring concrete is formed between the transverse drainage pipe and the reserved hole;
[0011] The transverse drainage pipe is provided with two arc-shaped plates at the end close to the reserved hole, the two arc-shaped plates are detachably connected, one side of the arc-shaped plate close to the prefabricated central drainage ditch is integrally connected with a semicircular hole sealing plate, the semicircular hole sealing plate is in contact with the outer side of the prefabricated central drainage ditch and seals the reserved hole.
[0012] Preferably, the two arc-shaped plates are connected through a plurality of bolts.
[0013] Preferably, the semicircular hole sealing plate is provided with a concave cavity on the side close to the prefabricated central drainage ditch, the concave cavity is communicated with the reserved hole and forms a pouring cavity.
[0014] Preferably, the edge of the semicircular hole sealing plate is provided with a rubber pad.
[0015] Preferably, the grouting pipe is a PVC pipe or a PE pipe.
[0016] Compared with the prior art, the utility model has the advantages that:
[0017] 1、 the utility model discloses a water-swelling sealing strip is installed in the reserved hole, after the transverse drainage pipe is inserted into the reserved hole and is in contact with the water-swelling sealing strip, and a hole sealing assembly is installed on the outer side of the transverse drainage pipe, the other side of the reserved hole is sealed, fine stone concrete is injected into the reserved hole through the grouting pipe, the fine stone concrete can quickly fill the gap between the transverse drainage pipe and the reserved hole, the water-swelling sealing strip expands after meeting water, fills the gap, effectively prevents water permeation, ensures that the compactness of concrete filling is completely uniform, and there is no gap, thereby ensuring the stability of the connection between the transverse drainage pipe and the prefabricated central drainage ditch, and the construction is convenient, time and labor are saved, and construction efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a schematic view of the tunnel waterproof and drainage structure of the utility model;
[0019] Figure 2 It is a schematic view of the utility model Figure 1 It is an enlarged structure schematic view of the middle A of the utility model;
[0020] Figure 3 It is a three-dimensional structure schematic view of the hole sealing assembly of the utility model.
[0021] In the figure: 1 primary support layer, 2 secondary lining layer, 3 circumferential drainage blind pipe, 4 longitudinal drainage pipe, 5 transverse drainage pipe, 6 prefabricated central drainage ditch, 7 grouting pipe, 8 reserved hole, 91 arc plate, 92 half-round hole sealing plate, 93 bolt, 10 water-swelling waterstop. DETAILED DESCRIPTION
[0022] The utility model is further explained below in combination with the drawings and examples.
[0023] Please refer to Figures 1-3 The utility model provides a kind of tunnel waterproof and drainage structure technical scheme:
[0024] Example one:
[0025] According to Figures 1-3 As shown, including primary support layer 1, secondary lining layer 2, N parallelly arranged circumferential drainage blind pipe 3, M parallelly arranged longitudinal drainage pipe 4 and prefabricated central drainage ditch 6 located at the bottom of tunnel, primary support layer 1 is arranged at the inside of tunnel excavation face, for bearing surrounding rock pressure and groundwater pressure, guarantee tunnel construction safety, secondary lining layer 2 is located at the inside of primary support layer 1, for improving the overall bearing capacity and waterproof performance of tunnel structure.
[0026] Circumferential drainage blind pipe 3 is arranged between primary support layer 1 and secondary lining layer 2, for collecting and guiding groundwater in tunnel to flow to preset direction, longitudinal drainage pipe 4 is arranged at the side wall part of tunnel, and is connected with the bottom end of circumferential drainage blind pipe 3, for draining groundwater along tunnel longitudinal direction, prefabricated central drainage ditch 6 and longitudinal drainage pipe 4 are provided with transverse drainage pipe 5, one end of transverse drainage pipe 5 is connected with longitudinal drainage pipe 4, so that the water in longitudinal drainage pipe 4 can be discharged into prefabricated central drainage ditch 6 through transverse drainage pipe 5.
[0027] The left and right two side walls of prefabricated central drainage ditch 6 are provided with reserved hole 8, and the top of reserved hole 8 is provided with grouting pipe 7, grouting pipe 7 is PVC pipe or PE pipe, the lower end of grouting pipe 7 is communicated with reserved hole 8, and the upper end thereof extends to the top of prefabricated central drainage ditch 6, so as to facilitate workers to inject fine aggregate concrete into reserved hole 8 through grouting pipe 7.
[0028] Water-swelling waterstop 10 is arranged in reserved hole 8, the other end of transverse drainage pipe 5 extends into reserved hole 8 and contacts with water-swelling waterstop 10, water-swelling waterstop 10 expands after meeting water, fills gap, effectively prevents water permeation, and there is gap between transverse drainage pipe 5 and reserved hole 8 for pouring concrete.
[0029] Two arc-shaped plates 91 are sleeved on one end of the transverse drain pipe 5 close to the reserved hole 8, and the two arc-shaped plates 91 are connected through a plurality of bolts 93. By removing the bolts 93, the two arc-shaped plates 91 are removed from the transverse drain pipe 5. The arc-shaped plate 91 is integrally connected with a semicircular hole sealing plate 92 on the side close to the prefabricated central drainage ditch 6. The semicircular hole sealing plate 92 is in contact with the outer side of the prefabricated central drainage ditch 6 and blocks the reserved hole 8. The fine stone concrete is injected into the reserved hole 8 through the grouting pipe 7. The fine stone concrete can quickly fill the gap between the transverse drain pipe 5 and the reserved hole 8, ensure that the compactness of the concrete filling is completely uniform without gaps, thereby ensuring the stability of the connection between the transverse drain pipe 5 and the prefabricated central drainage ditch 6.
[0030] In specific use, the tunnel waterproof and drainage structure is first hung into the groove according to the design position, then the water-swelling sealing strip 10 is installed in the reserved hole 8, then one transverse drain pipe 5 is inserted into the reserved hole 8 and contacts with the water-swelling sealing strip 10, then the transverse drain pipe 5 is connected with the last transverse drain pipe 5, then the two arc-shaped plates 91 are sleeved on the transverse drain pipe 5, and the two semicircular hole sealing plates 92 are in close contact with the outer side of the prefabricated central drainage ditch 6. The upper and lower arc-shaped plates 91 are connected and fixed by using a plurality of bolts 93. Finally, the fine stone concrete is injected into the reserved hole 8 through the grouting pipe 7. The fine stone concrete can quickly fill the gap between the transverse drain pipe 5 and the reserved hole 8. The water-swelling sealing strip 10 expands after being contacted with water, fills the gap, effectively prevents water penetration, and ensures that the compactness of the concrete filling is completely uniform without gaps.
[0031] Embodiment two:
[0032] On the basis of the embodiment one, as shown in Figure 1 and Figure 2 The semicircular hole sealing plate 92 is provided with a recess on the side close to the prefabricated central drainage ditch 6. The recess is in communication with the reserved hole 8 and forms a pouring cavity, further improving the stability of the connection between the transverse drain pipe 5 and the prefabricated central drainage ditch 6. The edge of the semicircular hole sealing plate 92 is provided with a rubber pad, improving the sealing property of the connection between the semicircular hole sealing plate 92 and the prefabricated central drainage ditch 6.
Claims
1. A tunnel drainage structure comprising a primary support layer, a secondary lining layer, N parallel annular drainage blind pipes, M parallel longitudinal drainage pipes, and a prefabricated central drainage ditch located at the center of the tunnel bottom. The primary support layer is located inside the tunnel excavation face, and the secondary lining layer is located inside the primary support layer. The annular drainage blind pipe is set between the primary support layer and the secondary lining layer. The longitudinal drainage pipe is set at the tunnel side wall and connected to the bottom end of the annular drainage blind pipe. A transverse drainage pipe is set between the prefabricated central drainage ditch and the longitudinal drainage pipe. One end of the transverse drainage pipe is connected to the longitudinal drainage pipe. It is characterized by: The left and right side walls of the prefabricated central drainage ditch are respectively provided with reserved holes, and the tops of the reserved holes are provided with grouting pipes, the lower ends of the grouting pipes are connected to the reserved holes, and the upper ends of the grouting pipes extend to the top of the prefabricated central drainage ditch; A water-swelling waterstop strip is provided in the reserved hole, the other end of the transverse drainage pipe extends into the reserved hole and contacts the water-swelling waterstop strip, and a gap for pouring concrete exists between the transverse drainage pipe and the reserved hole; The end of the horizontal drainage pipe close to the reserved hole is sleeved with two arc-shaped plates, which are detachably connected. A semicircular sealing plate is integrally connected to the side of the arc-shaped plate close to the prefabricated central drainage ditch. The semicircular sealing plate contacts the outer side of the prefabricated central drainage ditch and seals the reserved hole.
2. The tunnel waterproofing and drainage structure according to claim 1, characterized in that: The two arc-shaped plates are connected by a plurality of bolts.
3. The tunnel waterproofing and drainage structure according to claim 1, characterized in that: A concave cavity is provided on one side of the semicircular sealing plate close to the prefabricated central drainage ditch. The concave cavity is communicated with the reserved hole to form a casting cavity.
4. The tunnel waterproofing and drainage structure according to claim 1 or 3, characterized in that: The edge of the semicircular sealing plate is provided with a rubber pad.
5. The tunnel waterproofing and drainage structure according to claim 1, characterized in that: The grouting pipe is a PVC pipe or a PE pipe.