A sunken tunnel open section drainage and seepage prevention integrated structure and construction method

Abstract

The application discloses a sinking type tunnel open section drainage and anti-seepage integrated structure and a construction method. The structure comprises an anti-seepage plate, the top of the anti-seepage plate is symmetrically connected with a limiting assembly, the inner side right-angle edge of a vertical plate is in contact with the top of a limiting plate, the horizontal plate assembly comprises a connecting plate corresponding to a corner trapezoidal groove, a plurality of horizontal vertical grooves are uniformly formed in the connecting plate, and the groove bottom of the vertical groove is communicated with a square groove formed in the connecting plate. The anti-seepage plate structure is designed, the anti-seepage plate structure is connected with the limiting assembly, the problem of space influence installation is reduced, the whole adopts an insertion covering installation mode, the gap at the connecting position is effectively position adjusted and liquid closed, and the seepage caused by the too large gap or the too low connecting position is reduced.

Description

Technical Field

[0001] This invention belongs to the field of road engineering technology, and more specifically, relates to an integrated structure and construction method for drainage and seepage prevention in the open section of a sunken tunnel. Background Technology

[0002] The open section of a sunken tunnel is part of the sunken tunnel and is usually located at the tunnel entrance and exit. It connects with the buried section and the surface road and has unique structural features and functions. There is a drainage structure between it and the closed section, which is mainly used to divert water on the slope of the sunken road to prevent water from entering the tunnel and causing water accumulation or other situations that affect traffic.

[0003] The installation of drainage structures in the open sections of sunken tunnels is hampered by installation conditions, making it difficult to install them as a single unit at the drainage ditch location. Instead, individual components must be spliced ​​together. Due to the limited installation space, the waterproofing performance of the drainage structure and the roadbed is affected by the installation method, making it prone to seepage during rainy weather. Furthermore, the reverse seepage of groundwater can affect the settlement of the roadbed near the drainage section of the sunken tunnel, causing a difference in elevation between the drainage structure and the road surface, ultimately leading to damage to the drainage structure. Therefore, we propose an integrated drainage and seepage prevention structure and construction method for the open sections of sunken tunnels. Summary of the Invention

[0004] To address the aforementioned deficiencies or improvement needs of the prior art, according to a first aspect of the present invention, the present invention provides an integrated drainage and seepage prevention structure for the open section of a sunken tunnel, comprising a seepage prevention plate, with limiting components symmetrically connected to the top of the seepage prevention plate, a positioning component connected to the top of the limiting component, and a horizontal plate assembly connected to opposite sides of the two positioning components. The limiting component includes a limiting plate, with a seepage prevention groove in the middle of the limiting plate that engages with the seepage prevention plate. The positioning component includes an L-shaped vertical plate, with a plurality of corner trapezoidal grooves evenly distributed on the outer right-angled side of the vertical plate, and the inner right-angled side of the vertical plate contacting the top of the limiting plate. The horizontal plate assembly includes a connecting plate corresponding to the corner trapezoidal grooves, with a plurality of horizontal vertical grooves evenly distributed on the connecting plate, the bottom of which communicates with a square groove on the connecting plate.

[0005] Preferably, the two sides of the seepage barrier are vertically inserted into the seepage barrier trench, the middle part of the seepage barrier is horizontal and has a curved part between it and the two vertical structures, and the limiting plate has an arc-shaped groove that matches the curved part.

[0006] Preferably, the vertical structure of the seepage barrier is provided with several outward-facing semi-circular positioning plates, and the seepage barrier groove is provided with a circular groove that cooperates with the positioning plates. When the bottom of the seepage barrier is in contact with the seepage barrier groove, its height is higher than the height of the limiting plate.

[0007] Preferably, a positive trapezoidal plate is provided on one bottom side of the limiting plate, and a plurality of positioning blocks for limiting the bottom of the vertical plate are evenly provided on the positive trapezoidal plate, and the top of the positive trapezoidal plate is inclined downward on the side away from the limiting plate.

[0008] Preferably, the bottom of the other side of the limiting plate is provided with a side trapezoidal plate, and the side trapezoidal plate has several horizontal grooves. The top of the grooves is filled with road construction material, and the cross-section of the grooves is triangular.

[0009] Preferably, the vertical plate has a side positioning groove on the side of the plate near the limiting plate, which corresponds to the bottom of the corner trapezoidal groove. The groove wall of the side positioning groove has an isosceles trapezoidal shape. The top of the vertical plate and the limiting plate are provided with a reverse chamfer.

[0010] Preferably, the top of the connecting plate is provided with a positioning frame, the side of the positioning frame away from the connecting plate corresponds to the side positioning groove, the middle of the square groove is raised, the top and bottom of the groove wall of the vertical groove are outwardly expanded, and the groove opening of the square groove is inclined downward.

[0011] According to a second aspect of the present invention, a construction method for an integrated drainage and seepage prevention structure for an open section of a sunken tunnel is provided, comprising any one of the above-mentioned integrated drainage and seepage prevention structures for an open section of a sunken tunnel, the construction steps of which are as follows:

[0012] Step 1: Insert the vertical structures on both sides of the seepage barrier into the seepage grooves on the two limiting plates, aligning the positioning plates with the circular grooves;

[0013] Step 2: Excavate an inverted trapezoidal drainage ditch, lay blind drains on both sides of the bottom and fill them, then install permeable geotextile on top of the blind drains. Material needs to be reserved on both sides of the geotextile that is higher than the height of the vertical slab after installation. At the same time, spray quick-setting rubber on the surface of the geotextile. After spraying, lay a waterproof layer according to the length of the geotextile and fill the waterproof layer with concrete.

[0014] Step 3: Place the structure installed in Step 1 into the drainage ditch in Step 2. After horizontal installation, the bottom of the anti-seepage board and the limiting plate should be in contact with the concrete. Then, pour the road construction material on the outer side trapezoidal plate and wait for it to solidify.

[0015] Step 4: Insert the vertical plate into the limiting plates on both sides. At this time, the bottom of the vertical plate is restricted by the positioning block, and the top is in contact with the limiting plate. At the same time, the reverse chamfer is inclined to fit the top of the limiting plate.

[0016] Step 5: Place several connecting plates in the corresponding positions of the corner trapezoidal groove, and press down at both ends. The positioning plate at the bottom of the connecting plate will be squeezed down and enter the side positioning groove, and the installation will be completed.

[0017] Preferably, during the construction of step three, it is necessary to ensure that space is reserved on the side of the drainage ditch in step two for the installation of the side trapezoidal plate, and the installation needs to be carried out simultaneously with the concrete pouring in step two.

[0018] Preferably, in step four, the vertical plate needs to be installed while the road construction material is still in a state of being uncured and having connection properties, and the top of the vertical plate needs to be in contact with and connected to the road construction material based on the protruding position of the limiting plate.

[0019] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0020] 1. This invention designs a seepage-proof board structure that connects to a limiting component. The seepage-proof board is fixed in position via a seepage-proof groove. A vertical plate is installed on the limiting plate to position and cover its inner side, reducing direct contact between the limiting plate's sides and the liquid. The L-shaped vertical plate also serves to wrap and position the board inwards, completely covering its inner structure and reducing seepage. A corner trapezoidal groove connects to the connecting plate for rapid installation, minimizing space constraints. The overall installation uses a plug-in covering method, effectively adjusting the position and sealing the liquid at the joints, reducing seepage caused by excessively large gaps or low joints. This solves the technical problem of seepage easily occurring after installation of drainage structures in open sections of sunken tunnels.

[0021] 2. The present invention also utilizes a prefabricated and then installed construction method for the drainage structure. The anti-seepage plate is inserted into the anti-seepage groove on the limiting plate, then installed in the drainage ditch, and finally filled. This eliminates the need for individual structure installation, effectively reducing the likelihood of gaps caused by bottom structure installation. Simultaneously, after the vertical plate contacts the limiting plate, its bottom is fixed to the positioning block, improving the connection stability of the vertical plate. Furthermore, by connecting the connecting plate to the corner trapezoidal groove, and inserting the bottom positioning frame into the side positioning groove, the connecting plate is fixed. The entire structure eliminates the need for individual structure construction in confined spaces, improving construction efficiency while reducing water seepage during construction, thus solving the drainage problem and preventing water seepage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an integrated drainage and seepage prevention structure for an open section of a sunken tunnel according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the overall unfolded structure of an integrated drainage and seepage prevention structure for an open section of a sunken tunnel according to an embodiment of the present invention;

[0024] Figure 3 This is a front view schematic diagram of an integrated drainage and seepage prevention structure for an open section of a sunken tunnel according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a seepage-proof plate structure for an integrated drainage and seepage-proof structure in the open section of a sunken tunnel, according to an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of a limiting component structure for an integrated drainage and seepage prevention structure in the open section of a sunken tunnel, according to an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of a positioning component structure for an integrated drainage and seepage prevention structure in the open section of a sunken tunnel, according to an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of a horizontal plate assembly structure for an integrated drainage and seepage prevention structure in the open section of a sunken tunnel, according to an embodiment of the present invention.

[0029] Figure 8 This is a schematic cross-sectional view of a horizontal plate component of an integrated drainage and seepage prevention structure for an open section of a sunken tunnel, according to an embodiment of the present invention.

[0030] Figure 9 This is a schematic diagram of the construction process of an integrated drainage and seepage prevention structure for an open section of a sunken tunnel, according to an embodiment of the present invention.

[0031] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 100-proof board, 110-positioning plate, 120-bend, 200-limiting assembly, 210-limiting plate, 220-side trapezoidal plate, 230-front trapezoidal plate, 240-positioning block, 250-proof trench, 300-positioning assembly, 310-vertical plate, 320-reverse chamfer, 330-corner trapezoidal groove, 340-side positioning groove, 400-horizontal plate assembly, 410-connecting plate, 420-vertical groove, 430-square groove, 440-positioning frame. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other. Example

[0033] like Figures 1 to 9As shown, this embodiment of the invention provides an integrated drainage and seepage prevention structure and construction method for an open section of a sunken tunnel, including a seepage prevention plate 100. A limiting component 200 is symmetrically connected to the top of the seepage prevention plate 100. A positioning component 300 is connected to the top of the limiting component 200. A horizontal plate component 400 is connected to one side of each of the two positioning components 300. The limiting component 200 includes a limiting plate 210, and a seepage prevention groove 2 is formed in the middle of the limiting plate 210 to engage with the seepage prevention plate 100. 50. The positioning component 300 includes a vertical plate 310 with an L-shaped structure. Several corner trapezoidal grooves 330 are evenly opened on the outer right-angled edge of the vertical plate 310. The inner right-angled edge of the vertical plate 310 contacts the top of the limiting plate 210. The horizontal plate component 400 includes a connecting plate 410 corresponding to the corner trapezoidal grooves 330. Several horizontal vertical grooves 420 are evenly opened on the connecting plate 410. The bottom of the vertical grooves 420 communicates with the square grooves 430 opened on the connecting plate 410.

[0034] This invention designs a seepage-proof plate 100 structure, which is connected to the limiting component 200. The seepage-proof groove 250 fixes the overall position of the seepage-proof plate 100. At the same time, a vertical plate 310 is installed on the limiting plate 210 to position and cover the inner side of the limiting plate 210, reducing the direct contact between the side of the limiting plate 210 and the liquid. The L-shaped vertical plate 310 also serves to wrap and position the inner side of the vertical plate 310, thus reducing water seepage. In addition, a corner trapezoidal groove 330 is used to connect with the connecting plate 410 to achieve rapid installation and reduce the problem of space affecting installation. The overall installation adopts a plug-in covering method, which effectively adjusts the position of the gaps at the connection and seals the liquid, reducing the occurrence of water seepage caused by excessively large gaps or excessively low connection points. This solves the technical problem of water seepage that easily occurs after the installation of drainage structures in the open section of sunken tunnels.

[0035] This invention also utilizes the prefabrication and installation method of the drainage structure's construction steps. The seepage-proof plate 100 is inserted into the seepage-proof groove 250 on the limiting plate 210, then installed in the drainage ditch and filled. This eliminates the need for individual structure installation, effectively reducing the likelihood of gaps caused by bottom structure installation. Simultaneously, after the vertical plate 310 contacts the limiting plate 210, its bottom is fixed to the positioning block 240, improving the connection stability of the vertical plate 310. Furthermore, by connecting the connecting plate 410 to the corner trapezoidal groove 330, and inserting the bottom positioning frame 440 into the side positioning groove 340, the connecting plate 410 is fixed. The entire structure eliminates the need for individual structure construction in confined spaces, improving construction efficiency while reducing water seepage during construction. This solves the drainage problem and prevents water seepage.

[0036] The two sides of the seepage barrier 100 are vertically inserted into the seepage barrier 250. The middle of the seepage barrier 100 is horizontal and has a bend 120 between it and the two vertical structures. The limiting plate 210 has an arc-shaped groove that matches the bend 120. Several outwardly facing semi-circular positioning plates 110 are provided at the vertical structure positions of the seepage barrier 100. The seepage barrier 250 has a circular groove that matches the positioning plate 110. When the bottom of the seepage barrier 100 contacts the seepage barrier 250, its height is higher than the height of the limiting plate 210. The two sides of the seepage barrier 100 are inserted into the seepage barrier 250, which increases the height of the connection gap between the seepage barrier 100 and the seepage barrier 250, reducing liquid seepage. At the same time, the bend 120 reduces the possibility of water accumulation between the seepage barrier 100 and the vertical structure, improving the seepage barrier 100's performance. The semi-circular positioning plate 110 corresponds to the circular groove in the seepage prevention channel 250. After the limiting plate 210 is inserted into the seepage prevention plate 100, the installation connection of the seepage prevention plate 100 can be known by the connection between the positioning plate 110 and the circular groove. Based on the positioning plate 110 and the circular groove, the connection stability between the seepage prevention plate 100 and the limiting plate 210 is improved. The main body of the seepage prevention plate 100 is preferably made of high-density polyethylene (HDPE) material. HDPE material has excellent chemical corrosion resistance (can withstand industrial wastewater with acid and alkali concentration ≤15% and soil erosion), anti-aging performance (outdoor service life can reach 15-20 years) and low temperature impact resistance (no risk of brittleness in -40℃ environment). It also has low density (0.941-0.965g / cm³) and light weight, which is convenient for transportation and installation.

[0037] A positive trapezoidal plate 230 is provided on one bottom side of the limiting plate 210. Several positioning blocks 240 are evenly distributed on the positive trapezoidal plate 230 to restrict the bottom of the vertical plate 310. The top of the positive trapezoidal plate 230 slopes downwards away from the limiting plate 210. A side trapezoidal plate 220 is provided on the bottom side of the limiting plate 210. Several horizontal grooves are formed on the side trapezoidal plate 220, and the top of the grooves is filled with road construction material. The cross-section of the grooves is triangular. The positive trapezoidal plate 230 is used to restrict the inner position of the impermeable plate 100. To further extend and reduce the direct exposure of the curved portion 120 of the impermeable board 100, internal water seepage or backflow is prevented. The installation of the side trapezoidal plate 220 facilitates integration with external road construction materials, improving the installation stability of the side trapezoidal plate 220 and enhancing the integration of the limiting plate 210 with the road surface. This reduces the risk of groundwater seepage due to gaps or instability after installation. The limiting plate 210 is integrally injection molded from modified polypropylene (PP + 30% glass fiber). This material has a tensile strength of up to 45 MPa and a hardness (Rockwell R) ≥ 110, effectively resisting external liquid seepage pressure.

[0038] On one side of the vertical plate 310 near the limiting plate 210, there is a side positioning groove 340 corresponding to the bottom of the corner trapezoidal groove 330. The groove wall of the side positioning groove 340 has an isosceles trapezoidal shape. A reverse chamfer 320 is provided at the top contact position between the vertical plate 310 and the limiting plate 210. The side positioning groove 340 is located directly below the corner trapezoidal groove 330. It adopts an isosceles trapezoidal structure, which facilitates limiting while reducing the possibility of side slippage of the contact structure, thereby improving the overall structural restraint capability. The reverse chamfer 320 on the vertical plate 310 reduces the possibility of groundwater seepage and improves the impermeability. The vertical plate 310 is preferably made of Q235B hot-dip galvanized steel plate, and the recommended plate thickness is 4-6mm. The material has a tensile strength of 375-500MPa and a yield strength of ≥235MPa, and can withstand the lateral load caused by soil lateral pressure and structural settlement. The surface hot-dip galvanized layer is ≥85μm thick, which can effectively resist electrochemical corrosion in underground humid environments, and the outdoor service life can reach 20-30 years.

[0039] The top of the connecting plate 410 is equipped with a positioning frame 440. The side of the positioning frame 440 away from the connecting plate 410 corresponds to the side positioning groove 340. The middle of the square groove 430 is raised, and the top and bottom of the vertical groove 420 are outwardly flared. The opening of the square groove 430 is inclined downward. The positioning frame 440 is connected to the bottom of the connecting plate 410 to correspond with the side positioning groove 340, thereby supporting the bottom of the connecting plate 410 and improving the compressive strength when vehicles come into contact on both sides, thus improving the overall integrity. The connecting plate is made of high-strength aluminum alloy plate (6061-T6) with a thickness of 4-6mm. This material has a density of only 2.7g / cm³, which is 1 / 3 that of steel, making it easy to transport and install on site. After T6 heat treatment, the tensile strength reaches 310MPa, and the yield strength is ≥276MPa, which can meet the load-bearing requirements of lightweight waterproof structures. Example

[0040] A construction method for an integrated drainage and seepage prevention structure for an open section of a sunken tunnel, comprising any one of the above-mentioned integrated drainage and seepage prevention structures for an open section of a sunken tunnel, wherein the construction steps are as follows:

[0041] Step 1: Insert the vertical structures on both sides of the seepage barrier 100 into the seepage barrier grooves 250 on the two limiting plates 210 respectively, with the positioning plate 110 corresponding to the circular groove;

[0042] This operating method fundamentally solves the pain points of "difficult positioning and low accuracy" in the installation of traditional seepage prevention structures. The semi-circular structure of the positioning plate 110 forms a "shape-locking" positioning relationship with the circular groove in the seepage prevention trench 250. Combined with the guiding effect of the vertical structure of the seepage prevention plate 100, construction personnel do not need to rely on complex measuring tools and can achieve preliminary positioning by visual alignment alone. The positioning error can be controlled within ±0.5mm. Compared with the traditional bolt fixing or welding positioning method, the installation efficiency is improved by more than 40%.

[0043] Step 2: Excavate an inverted trapezoidal drainage ditch, lay blind drains on both sides of the bottom and fill them, then install permeable geotextile on top of the blind drains. Material needs to be reserved on both sides of the geotextile to be higher than 310mm of the vertical slab after installation. At the same time, spray quick-setting rubber on the surface of the geotextile. After spraying, lay a waterproof layer according to the length of the geotextile and fill the waterproof layer with concrete.

[0044] This construction method utilizes a layered drainage system consisting of an inverted trapezoidal channel, blind drains, and permeable geotextile to significantly improve drainage efficiency. Firstly, the inverted trapezoidal channel structure possesses natural drainage advantages; the sloping walls on both sides (angle 30°-45°) guide water towards the channel bottom, reducing dead zones for water stagnation compared to rectangular channels and increasing water flow velocity by over 30%. Secondly, the blind drains (filled with 20-50mm gravel) laid on both sides of the channel bottom form "lateral drainage channels," quickly collecting seepage water from the channel bottom and surrounding soil, preventing structural erosion caused by water accumulation at the channel bottom. The permeability coefficient of the blind drains can reach 1×10⁻⁶. -3 For drainage channels with a flow rate of cm / s or higher, groundwater level control efficiency is improved by 50% compared to drainage ditches without blind drains. The application of permeable geotextile (unit area mass ≥ 200g / ㎡) further optimizes drainage performance, with a permeability ≥ 5×10⁻⁶. -3 The flow rate is m / s, which can filter mud and impurities in the water, prevent blind drains from being blocked, and guide the accumulated water into the blind drains evenly, avoiding blind drain erosion caused by excessive local water flow; the quick-setting rubber spray coating (1-2mm thick) forms an elastic permeable membrane on the surface of the geotextile, which does not hinder water infiltration, but also enhances the geotextile's erosion resistance, ensuring smooth drainage in the long term. It is suitable for heavy rainfall scenarios such as rainstorms and flood seasons, effectively reducing the risk of waterlogging.

[0045] Step 3: Place the structure installed in Step 1 into the drainage ditch in Step 2. After horizontal installation, the bottom of the anti-seepage board 100 and the limiting plate 210 should be in contact with the concrete. Then, pour the road construction material on the outer side trapezoidal plate 220 and wait for it to solidify. During construction, it is necessary to ensure that space is reserved on the side of the drainage ditch in Step 2 for the installation of the side trapezoidal plate 220, and the installation should be carried out simultaneously with the concrete pouring in Step 2.

[0046] Step 4: Insert the vertical plate 310 onto the limiting plates 210 on both sides. At this time, the bottom of the vertical plate 310 is restricted by the positioning block 240, and the top is in contact with the limiting plate 210. At the same time, the reverse chamfer 320 is inclined to fit against the top of the limiting plate 210. When installing the vertical plate 310, it is necessary to ensure that the road construction material is not solidified and still has the ability to connect. It is necessary to ensure that the top of the vertical plate 310 is in contact with and connected to the road construction material based on the protruding position of the limiting plate 210.

[0047] Step 5: Place several connecting plates 410 at the corresponding positions of the corner trapezoidal groove 330, and press down at both ends. The positioning plate 110 at the bottom of the connecting plate 410 is pressed down and enters the side positioning groove 340, and the installation is finally completed. Example

[0048] On-site construction:

[0049] A transverse drainage ditch is excavated in the open section of the tunnel, and vertical water diversion channels are set up on both sides of the road and connected to the transverse drainage ditch. The construction method of the transverse drainage ditch is as follows:

[0050] The drainage ditch is set up in an inverted trapezoidal structure. After the bottom is filled and leveled, a blind drain is laid. The blind drain is filled and leveled with sand and gravel. Then, geotextile is installed in the leveled area. Quick-setting rubber is sprayed on the surface of the geotextile. Then, a waterproof layer is laid on top of the quick-setting rubber. After the quick-setting rubber has solidified, concrete is filled on top of the waterproof layer.

[0051] Structural installation:

[0052] Before filling the drainage ditch with concrete, insert the anti-seepage plate 100 into the limiting plate 210 and fix it. After filling the drainage ditch with concrete, place the fixed limiting plate 210 and the anti-seepage plate 100 horizontally on the slow-setting soil, keeping the top of the limiting plate 210 at a distance that is level with the road surface after the vertical plate 310 is installed. Then, fill the road construction material, including asphalt, on the outside of the limiting plate 210, i.e., the side trapezoidal plate 220. Before the road construction material has solidified, install the vertical plate 310. The bottom of the vertical plate 310 needs to be located between the positioning block 240 and the limiting plate 210. The reverse chamfer 320 of the top of the vertical plate 310 needs to fit against the side of the limiting plate 210. After the vertical plate 310 is installed, insert the connecting plate 410 based on the corner trapezoidal groove 330 and press it down, so that the positioning frame 440 is fixed with the side positioning groove 340.

[0053] External equipment installation:

[0054] A liquid level sensor is installed in the drainage ditch composed of a seepage-proof plate 100 and a limiting plate 210, and a drainage pump is installed in conjunction with the output information of the liquid level sensor. That is, the start and stop of the drainage pump are automatically controlled according to the liquid level. This linkage method is existing technology and will not be described in detail.

[0055] A drain outlet is installed at the connection between the vertical water intake channel and the horizontal drainage channel. A detachable grating is installed at the location of the drain outlet. The grating and its installation method are existing technologies and will not be described in detail.

[0056] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. An integrated drainage and seepage prevention structure for the open section of a sunken tunnel, characterized in that, It includes a seepage barrier board (100), with a limiting component (200) symmetrically connected to the top of the seepage barrier board (100), a positioning component (300) connected to the top of the limiting component (200), and a horizontal plate component (400) connected to the opposite side of the two positioning components (300). The limiting component (200) includes a limiting plate (210) for improving the side seepage prevention capability, and the limiting plate (210) has a seepage prevention groove (250) in the middle that engages with the seepage prevention plate (100). The positioning component (300) includes a vertical plate (310) with an L-shaped structure for connecting the horizontal plate component (400). The outer right-angled edge of the vertical plate (310) is evenly provided with a plurality of corner trapezoidal grooves (330), and the inner right-angled edge of the vertical plate (310) contacts the top of the limiting plate (210). The horizontal plate assembly (400) includes a connecting plate (410) corresponding to the corner trapezoidal groove (330). The connecting plate (410) has several horizontal vertical grooves (420) evenly distributed on it to increase drainage performance. The bottom of the vertical grooves (420) is connected to the square grooves (430) on the connecting plate (410). The seepage-proof plate (100) is connected to the limiting plate (210) to form a bottom seepage-proof structure. The seepage-proof performance is increased by installing the vertical plate (310) on the limiting plate (210). The connecting plate (410) is installed on the top of the vertical plate (310) to increase the compressive strength and reduce the impact of drainage.

2. The integrated drainage and seepage prevention structure for the open section of a sunken tunnel according to claim 1, characterized in that, The two sides of the seepage barrier (100) are vertically inserted into the seepage barrier trench (250). The middle part of the seepage barrier (100) is horizontal and has a curved part (120) between it and the vertical structure on both sides. The limiting plate (210) has an arc-shaped groove that matches the curved part (120).

3. A submersible tunnel open section drainage and seepage prevention integrated structure according to any one of claims 1-2, characterized in that, The vertical structure of the seepage-proof board (100) is provided with several outward semi-circular positioning plates (110), and the seepage-proof groove (250) is provided with a circular groove that cooperates with the positioning plate (110). When the bottom of the seepage-proof board (100) contacts the seepage-proof groove (250), its height is higher than the height of the limiting plate (210).

4. The integrated drainage and seepage prevention structure for the open section of a sunken tunnel according to claim 3, characterized in that, The bottom side of the limiting plate (210) is provided with a positive trapezoidal plate (230), and a plurality of positioning blocks (240) for limiting the bottom of the vertical plate (310) are evenly provided on the positive trapezoidal plate (230). The top of the positive trapezoidal plate (230) is inclined downward on the side away from the limiting plate (210).

5. The integrated drainage and seepage prevention structure for the open section of a sunken tunnel according to claim 4, characterized in that, The bottom of the other side of the limiting plate (210) is provided with a side trapezoidal plate (220), and several horizontal grooves are opened on the side trapezoidal plate (220). The top of the grooves is filled with road construction material, and the cross section of the grooves is triangular.

6. The integrated drainage and seepage prevention structure for the open section of a sunken tunnel according to claim 5, characterized in that, The vertical plate (310) has a side positioning groove (340) on one side of the plate near the limiting plate (210) that corresponds to the bottom of the corner trapezoidal groove (330). The groove wall cross section of the side positioning groove (340) is an isosceles trapezoid. The top contact position between the vertical plate (310) and the limiting plate (210) is provided with a reverse chamfer (320).

7. The integrated drainage and seepage prevention structure for the open section of a sunken tunnel according to claim 6, characterized in that, The top of the connecting plate (410) is provided with a positioning frame (440). The side of the positioning frame (440) away from the connecting plate (410) corresponds to the side positioning groove (340). The middle part of the square groove (430) is raised. The top and bottom of the groove wall of the vertical groove (420) are outwardly expanded. The groove opening of the square groove (430) is inclined downward.

8. A construction method for an integrated drainage and seepage prevention structure for an open section of a sunken tunnel, implemented using an integrated drainage and seepage prevention structure for an open section of a sunken tunnel as described in any one of claims 6-7, characterized in that, Includes the following steps: Step 1: Insert the vertical structures on both sides of the seepage barrier (100) into the seepage barrier grooves (250) on the two limiting plates (210) respectively, with the positioning plate (110) corresponding to the circular groove; Step 2: Excavate an inverted trapezoidal drainage ditch, lay blind drains on both sides of the bottom and fill them, then install permeable geotextile on top of the blind drains. Material needs to be reserved on both sides of the geotextile that is higher than the height of the vertical plate (310) after installation. At the same time, spray quick-setting rubber on the surface of the geotextile. After spraying, lay a waterproof layer according to the length of the geotextile and fill the waterproof layer with concrete. Step 3: Place the structure installed in Step 1 into the drainage ditch in Step 2. After horizontal installation, the bottom of the anti-seepage board (100) and the limiting plate (210) will be in contact with the concrete. Then, pour the road construction material on the outer side trapezoidal plate (220) and wait for it to solidify. Step 4: Insert the vertical plate (310) into the limiting plates (210) on both sides. At this time, the bottom of the vertical plate (310) is restricted by the positioning block (240), and the top is in contact with the limiting plate (210). At the same time, the reverse chamfer (320) is inclined to fit against the top of the limiting plate (210). Step 5: Place several connecting plates (410) at the corresponding positions of the corner trapezoidal groove (330) and press down at both ends. The positioning plate (110) at the bottom of the connecting plate (410) is squeezed down and enters the side positioning groove (340), and the installation is finally completed.

9. The construction method of an integrated drainage and seepage prevention structure for an open section of a sunken tunnel according to claim 8, characterized in that, In step three, during construction, it is necessary to ensure that space is reserved on the side of the drainage ditch in step two for the installation of the side trapezoidal plate (220), and the installation should be carried out simultaneously with the concrete pouring in step two.

10. A construction method for an integrated drainage and seepage prevention structure for an open section of a sunken tunnel according to claim 8, characterized in that, In step four, when installing the vertical plate (310), it is necessary to ensure that the road construction material is in a state of not being solidified and still having connection performance, and to ensure that the top of the vertical plate (310) is in contact with and connected to the road construction material based on the protruding position of the limiting plate (210).

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