Drainage structure and construction method for coastal deep excavation embankment construction

Abstract

The application discloses a kind of coastal deep excavation embankment construction drainage structure, comprising: water intercepting ditch, it is located on the cutting slope above;Water-collecting pool, it is located in the one side of coastal deep excavation embankment;Slope surface torrent structure, it is located on the slope surface of cutting slope;Wherein, water intercepting ditch is equipped with sand layer and water intercepting layer, water intercepting layer is located below the sand layer, slope surface torrent structure includes waterproof layer and spiral flow guide layer, spiral flow guide layer is equipped on waterproof layer, waterproof layer and spiral flow guide layer are integrally formed, multiple through holes are spaced apart and arranged on spiral flow guide layer, multiple bolts are cooperated with multiple screw holes arranged on the slope surface of multiple cutting slopes by multiple through holes to tightly adhere slope surface torrent structure on the slope surface of cutting slope to form temporary water interception and drainage structure.The application effectively combines temporary water interception and permanent drainage, leads out the rainwater of cutting top and slope surface outside cutting, to prevent cutting slope from being washed, leading to slope instability, ensure the stability of embankment and reduce later quality hidden danger.

Description

Technical Field

[0001] This invention relates to the field of coastal deep-excavation roadbed construction technology. More specifically, this invention relates to a drainage structure and construction method for coastal deep-excavation roadbed construction. Background Technology

[0002] Coastal construction, due to its unique climate and abundant rainfall, is prone to slope erosion if rainwater is not promptly drained during excavation, affecting roadbed stability and posing potential quality risks later. For example, application number CN202322474092.4, entitled "Anti-clogging Roadbed Drainage Structure," includes a roadbed drainage tank. Inside the tank, a filter screen is horizontally installed. A cleaning component, including a scraper, is located on one side of the top of the filter screen. The scraper's bottom surface is in contact with the top surface of the filter screen. Multiple forked cones are evenly installed on one side of the scraper's lower end. A pulling component is installed near the forked cones on the scraper's end. A disposal port is located on the top side of the roadbed drainage tank near the pulling component, and a pressure plate is movable on the disposal port. While this structure filters water through the filter screen, trapping impurities, the cleaning component periodically scrapes and collects these impurities below the disposal port for centralized treatment, thus achieving the effect of filtering and centrally treating impurities in the water. However, it cannot introduce rainwater from the roadbed slope into the drainage tank, nor can it combine temporary water interception with permanent drainage. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0004] Another objective of this invention is to provide a drainage structure for deep-cut roadbed construction along the coast. Designed for the climatic characteristics of coastal areas with abundant rainfall, this structure diverts rainwater from the top of the cut and the slope outside the cut during deep-cut roadbed construction, effectively combining temporary water interception and permanent drainage. This prevents erosion of the roadbed cut slopes and avoids slope instability caused by prolonged exposure to unfavorable geological conditions, ensuring roadbed stability and reducing potential quality issues later on.

[0005] To achieve these objectives and other advantages according to the present invention, a drainage structure for deep-cut coastal roadbed construction is provided, comprising:

[0006] A drainage ditch is installed above the slope of a primary road cut. The drainage ditch is provided with a sedimentation layer and a water interception layer. The distance between the sedimentation layer and the uppermost opening of the drainage ditch is 30-50 cm, and the water interception layer is located below the sedimentation layer.

[0007] A water collection pool is located on one side of a deep-cut coastal roadbed, and the water collection pool is connected to the intercepting ditch via a water pipe.

[0008] A slope rapid flow structure is configured on the slope surface of a multi-stage road cut. The slope rapid flow structure includes a waterproof layer and a spiral guide layer. The waterproof layer is fitted into the road cut slope, and the spiral guide layer is disposed on the waterproof layer. The waterproof layer and the spiral guide layer are integrally formed. The spiral guide layer has multiple through holes spaced apart. Multiple bolts are connected to multiple threaded holes on the slope surface of the multi-stage road cut through the multiple through holes to tightly attach the slope rapid flow structure to the slope surface of the road cut to form a temporary water interception and drainage structure.

[0009] Preferably, the drainage structure for the construction of the coastal deep-excavation roadbed further includes:

[0010] A water guide platform is positioned between adjacent upper and lower road cut slopes;

[0011] The water guide platform includes a bottom surface, a first side surface, and a second side surface. The bottom surface connects the first side surface and the second side surface. Multiple buffer strips are provided on both the first side surface and the second side surface. One end of the first side surface and the second side surface are sealed, and the other end is open and connected to the water collection tank through a water guide pipe.

[0012] Preferably, the lower end of the spiral guide layer is flush with the lower end of the waterproof layer, and the upper end of the spiral guide layer is at a distance from the upper end of the waterproof layer, the length of which is greater than the diameter of one of the threaded holes.

[0013] Preferably, the spiral guide layer is provided with multiple spiral guide grooves, and each spiral guide groove is provided with a spiral water-blocking structure on both sides.

[0014] Preferably, the intercepting ditch is a concrete cuboid structure with a length of 100cm, a width of 60cm, and a height of 100cm.

[0015] Preferably, each buffer bar has the same structure, and the length of each buffer bar is the same as the length of the first side.

[0016] This invention is further realized through a construction method for a drainage structure in a deep-cut coastal roadbed, the construction method of which includes the following steps:

[0017] Step 1: Construction of the intercepting ditch: At the construction site of the deep excavation roadbed along the coast, a concrete cuboid structure with a length of 100cm, a width of 60cm, and a height of 100cm is poured on the top of the trench. Reinforcing bars are installed on opposite sides at a distance of 30-50cm from the top opening of the concrete cuboid structure to form a sand-sediment layer support structure. The sand-sediment layer is fixed on the support structure. The intercepting ditch is formed after the concrete cuboid structure has solidified.

[0018] Step 2, slope rapid flow structure protection: Combined with the structure of the intercepting ditch, excavate downward to form a primary road cut slope. At the position of the primary road cut slope near the intercepting ditch, drill multiple threaded holes at intervals. Through multiple bolts passing through multiple through holes and multiple threaded holes on the spiral guide layer, tighten them to lay the slope rapid flow structure.

[0019] Step 3: Construction of the water guide platform. The bottom surface of the water guide platform is excavated below the slope of the first-level road cut. Concrete grout is poured on the bottom surface to form the first and second sides of the water guide platform. Multiple buffer strips are poured on the first and second sides of the water guide platform. After the concrete grout has solidified, the water guide platform is formed.

[0020] Step 4: Excavate below the water guide platform to form a secondary road cut slope. Repeat steps 2 and 3 to form a multi-stage excavated roadbed. Excavate on one side of the multi-stage excavated roadbed to form a water collection pool.

[0021] Step 5: Connect the intercepting ditch and the water guide platform to the collection pool through the water guide pipe so that the water in the intercepting ditch and the water guide platform can be discharged into the collection pool.

[0022] The present invention has at least the following beneficial effects:

[0023] 1. In response to the climate characteristics of coastal areas with abundant rainfall, during the construction of deep-cut roadbeds along the coast, rainwater from the top of the cut and the slope is diverted outside the cut to effectively combine temporary water interception and permanent drainage. This prevents the roadbed cut slope from being eroded and prevents the slope from becoming unstable due to prolonged exposure of poor geological slopes, thus ensuring the stability of the roadbed and reducing potential quality problems in the later stages.

[0024] 2. A sedimentation layer is set in the intercepting ditch to deposit the sand and gravel washed by rainwater. After sedimentation, the rainwater is temporarily stored through the intercepting layer set below the sedimentation layer and then transported to the collection pool set on one side of the deep excavation roadbed along the coast through the water pipe.

[0025] 3. By setting up a slope jet stream structure on the slope surface of the multi-level road cut slope, and setting the surface of the slope jet stream structure as a spiral guide layer, when the rainfall is heavy, the water flow with high scouring energy is dissipated and the water flow speed is slowed down, thereby reducing its ability to scour and damage the slope surface of the road cut slope.

[0026] 4. By setting multiple buffer strips on the opposite sides of the water guide platform, rainwater flowing down from the slope rapid flow structure is prevented from directly rushing into the bottom surface of the water guide platform, which would cause the bottom surface to bear too much impact force and lead to the instability of the slope subgrade, thus playing a buffering role against rainwater erosion.

[0027] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a coastal deep-excavation roadbed slope as described in one technical solution of the present invention;

[0029] Figure 2 This is a schematic diagram of the intercepting ditch and the collection pool in another technical solution of the present invention;

[0030] Figure 3 This is a schematic diagram of the slope rapid flow structure in another technical solution of the present invention;

[0031] Figure 4 This is a schematic diagram of the water guiding platform in another technical solution of the present invention;

[0032] Reference numerals: 1: Interception ditch, 100: Sediment layer, 110: Interception layer, 120: Threaded hole, 2: Primary road cut slope, 3: Collection pool, 4: Slope rapid flow structure, 400: Waterproof layer, 410: Spiral guide layer, 411: Spiral guide channel, 412: Spiral water-blocking structure, 420: Through hole, 5: Water guide platform, 500: Bottom surface, 510: First side surface, 520: Second side surface, 530: Buffer strip, 6: Secondary road cut slope. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0034] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0035] like Figures 1-4 As shown, the present invention provides a drainage structure for deep-cut coastal roadbed construction, comprising:

[0036] Interception ditch 1 is configured above the primary road cut slope 2; the interception ditch 1 is provided with a sedimentation layer 100 and a water interception layer 110, the distance between the sedimentation layer 100 and the uppermost opening of the interception ditch 1 is 30-50cm, and the water interception layer 110 is located below the sedimentation layer 100.

[0037] A water collection pool 3 is located on one side of a deep-cut roadbed along the coast; the water collection pool 3 is connected to the intercepting ditch 1 via a water pipe;

[0038] Slope rapid flow structure 4, which is configured on the slope surface of multi-stage road cut slope;

[0039] In this structure, multiple threaded holes 120 are spaced apart on the first-level road cut slope 2 near the intercepting ditch 1. The slope rapid flow structure 4 includes a waterproof layer 400 and a spiral guide layer 410. The waterproof layer 400 is fitted to the slope surface of the first-level road cut slope 2, and the spiral guide layer 410 is disposed on the waterproof layer 400. The waterproof layer 400 and the spiral guide layer 410 are integrally formed. Multiple through holes 420 are spaced apart on the spiral guide layer 410. Multiple bolts cooperate with the multiple through holes 420 and the multiple threaded holes 120 to tightly attach the slope rapid flow structure 4 to the slope surface of the multi-level road cut slope to form a temporary water interception and drainage structure.

[0040] In the above technical solutions, such as Figure 1The diagram shows a schematic of the slope structure of a two-stage deep-cut coastal roadbed. Due to the special geological characteristics of the coast, slope drainage must be carried out immediately after excavation during the construction of deep-cut coastal roadbeds, with a waterproof structure installed at each excavation stage. This technical solution employs a intercepting ditch 1 at the top of the slope, which is excavated and poured before the roadbed excavation. Before construction, the cement, sand, and stone materials used for pouring are tested and their mix proportions verified to ensure they meet construction standards. The intercepting ditch 1 is designed as a two-layer structure. The upper sediment layer 100 filters the silt and sand in the rainwater at the top of the trench. The filtered rainwater enters the lower intercepting layer 110. When the water level in the intercepting layer 110 reaches a certain height, the rainwater stored in the intercepting layer 110 is promptly transported through a water pipe to a collection pool 3 located on one side of the deep-cut coastal roadbed, achieving timely drainage of the roadbed slope structure. A slope rapid flow structure 4 is arranged on the slope surfaces of the primary road cut slope 2 and the secondary road cut slope 6. The slope rapid flow structure 4 includes a waterproof layer 400 and a spiral guide layer 410. The waterproof layer 400 is attached to the primary road cut slope 2 and the secondary road cut slope 6, and the spiral guide layer 410 is disposed on the waterproof layer 400. The waterproof layer 400 and the spiral guide layer 410 are integrally formed. By setting the surface of the slope rapid flow structure 4 into a spiral structure, when there is heavy rainfall, it dissipates the energy of the water flow with high scouring energy, slows down the water flow velocity, and reduces its scouring damage to the slope surface. The slope rapid flow structure 4 is detachably installed on the intercepting ditch 1 through bolt and screw hole connection to form a temporary water interception and drainage structure, which is easy to disassemble and can realize the reuse of slope waterproofing and drainage. The waterproof layer 400 is made of waterproof material, and the spiral guide layer 410 is also made of waterproof material. It is integrally formed with the waterproof layer 410. For example, the waterproof layer 400 is made of plastic material, and the spiral guide layer 410 is made of plastic material on the waterproof layer 400. The spiral water-blocking structure 412 on both sides of the spiral guide groove 411 in the spiral guide layer 410 can be formed by plastic inflatable spiral strips. To prevent water leakage at the connection between the slope rapid flow structure 4 and the intercepting ditch 1, the waterproof layer 410 can be designed so that one end is slightly longer than the spiral guide layer 410. When multiple bolts are tightened through multiple through holes 420 on the spiral guide layer 410 and multiple threaded holes 120 spaced apart on the primary road cut slope 2 near the intercepting ditch 1, and on the secondary road cut slope 6 near the water guide platform 5, the portion of the waterproof layer 410 that is longer than the spiral guide layer 410 is inserted below the bolt thread connection to prevent rainwater from entering the slope surface of the primary road cut slope 2 or the secondary road cut slope 6 through the gap between the two. When construction is completed and the slope no longer requires waterproofing, the slope rapid flow structure 4 can be removed from the primary road cut slope 2 and the secondary road cut slope 6 by loosening multiple bolts. The multiple threaded holes 120 on the slope surface of the primary road cut slope 2 and the secondary road cut slope 6 can then be filled and leveled by pouring concrete.Among them, the structure of the water collection pool 3 is a rectangular pool, and its length, width and height can be set according to the actual terrain, and are not limited here.

[0041] In the above technical solution, the construction method of the drainage structure for deep-cut coastal roadbed construction includes the following steps:

[0042] Construction of Interception Ditch 1: At the top of the deep excavation site of the coastal roadbed, a concrete cuboid structure with a length of 100cm, a width of 60cm, and a height of 100cm is poured. Reinforcing bars are installed on opposite sides at a distance of 30-50cm from the top opening of the concrete cuboid structure to form a support structure for the sedimentation layer 100. The sedimentation layer 100 (made of stainless steel structural filter mesh) is fixed on the support structure. After the concrete cuboid structure has solidified, the interception ditch 1 is formed.

[0043] Protection of the slope rapid flow structure 4: Combined with the structure of the intercepting ditch 1, a primary road cut slope 2 is formed by excavation downwards. Multiple threaded holes 120 are drilled at intervals on the primary road cut slope 2 near the intercepting ditch 1. Multiple bolts are passed through multiple through holes 420 on the spiral guide layer 410 and tightened with multiple threaded holes to lay the slope rapid flow structure 4.

[0044] In another technical solution, such as Figure 4 As shown, the drainage structure for the construction of the coastal deep-excavation roadbed also includes:

[0045] Water guide platform 5 is positioned between adjacent upper and lower road cut slopes;

[0046] The water guide platform 5 includes a bottom surface 500, a first side surface 510, and a second side surface 520. The bottom surface 500 connects the first side surface 510 and the second side surface 520. Multiple buffer strips 530 are provided on both the first side surface 510 and the second side surface 520. One end of the first side surface 510 and the second side surface 520 is sealed, and the other end is open and communicates with the water collection tank 3.

[0047] In the above technical solution, multiple buffer strips 530 are provided on both the first side 510 and the second side 520 of the water guide platform. These prevent rainwater flowing down from the slope rapid flow structure 4 from directly entering the bottom surface 500 of the water guide platform 5, thus avoiding excessive impact on the bottom surface 500 and causing instability of the slope subgrade. This serves as a buffer against rainwater erosion. Rainwater flowing directly down from the upper level of the slope rapid flow structure 4 into the water guide platform 5 is transported to the collection pool 3 through an opening at one end via a water pipe, thus intercepting and draining water from the roadbed slope during deep excavation.

[0048] In the above technical solution, the construction of the water guide platform 5 includes: excavating below the first-level road cut slope 2 to form the bottom surface 500 of the water guide platform 5; pouring concrete slurry on the bottom surface 500 to form the first side surface 510 and the second side surface 520 of the water guide platform 5; pouring multiple buffer strips 530 on the first side surface 510 and the second side surface 520 of the water guide platform 5 (the buffer strips 530 are formed by erecting steel pipes to form the structural outline of the buffer strips 530 before pouring); and forming the water guide platform 5 after the concrete slurry has solidified.

[0049] In another technical solution, such as Figure 4 As shown, the lower end of the spiral flow guiding layer 410 is flush with the lower end of the waterproof layer 400, and the upper end of the spiral flow guiding layer 410 is a distance away from the upper end of the waterproof layer 400, the length of which is greater than the diameter of one of the threaded holes 120.

[0050] In the above implementation scheme, taking the slope surface of the first-level road cut slope 2 as an example, in order to prevent rainwater from leaking into the slope surface of the first-level road cut slope 2 from the connection position between the slope rapid flow structure 4 and the intercepting ditch 1, the other end of the spiral guide layer 410 and the other end of the waterproof layer 400 are a certain distance apart, the length of which is greater than the diameter of one of the threaded holes 120. When multiple bolts are tightened through multiple through holes 420 on the spiral guide layer 410 and multiple threaded holes 120 set near the intercepting ditch 1 on the first-level road cut slope 2, the part of the waterproof layer 410 that is longer than the spiral guide layer 410 is inserted into the position of the threaded hole 120 below the connection, covering the connection position between the slope rapid flow structure 4 and the intercepting ditch 1, and preventing rainwater from entering the slope surface of the road cut slope 2 through the gap between the two and eroding the slope surface.

[0051] In another technical solution, such as Figure 3 As shown, the spiral guide layer 410 is composed of multiple spiral guide grooves 411, and each spiral guide groove 411 has a spiral water-blocking structure 412 on both sides.

[0052] In the above implementation scheme, each spiral guide channel 411 has a spiral water-blocking structure 412 on both sides, which is a raised waterproof structure, forming a spiral guide channel 411 between them. This allows rainwater to flow into the water guide platform 5 along each spiral guide channel 411. The spiral guide channel 411 guides the rainwater, and when the rainwater is heavy, it dissipates the energy of the water flow with high scouring energy, slowing down the water flow speed and reducing its scouring damage to the slope surfaces of the primary road cut slope 2 and the secondary road cut slope 6. The spiral guide layer 410 can be made of waterproof plastic material, and the spiral water-blocking structures 412 on both sides of the spiral guide channel 411 in the spiral guide layer 410 can be formed by plastic inflatable spiral strips.

[0053] In another technical solution, such as Figure 2As shown, the intercepting ditch 1 is a concrete cuboid structure with a length of 100cm, a width of 60cm, and a height of 100cm.

[0054] In the above implementation plan, for coastal construction projects with high rainfall, when the surface runoff flowing into the roadbed above the cut slope is large, a intercepting ditch is installed at the top of the slope to intercept water and prevent water from accumulating on the cut slope. The intercepting ditch is a 60cm wide and 100cm deep concrete cuboid structure. The location and size of the intercepting ditch can be adjusted according to the actual terrain.

[0055] In another technical solution, such as Figure 4 As shown, each buffer strip 530 has the same structure. Taking the first side 510 as an example, the length of each buffer strip 530 on the first side 510 is the same as the length of the first side 510. The structure of the second side 520 is symmetrical to that of the first side 510, and the structure of the multiple buffer strips provided on it is the same as that of the buffer strips on the first side.

[0056] This technical solution may also include the following technical details to better achieve the technical effect:

[0057] A construction method for drainage structures in deep-cut coastal roadbeds includes:

[0058] Step 1: Construction of the intercepting ditch: At the construction site of the deep excavation roadbed along the coast, a concrete cuboid structure with a length of 100cm, a width of 60cm, and a height of 100cm is poured on the top of the trench. Reinforcing bars are installed on opposite sides at a distance of 30-50cm from the top opening of the concrete cuboid structure to form a sand-sediment layer support structure. The sand-sediment layer is fixed on the support structure. The intercepting ditch is formed after the concrete cuboid structure has solidified.

[0059] Step 2, slope rapid flow structure protection: Combined with the structure of the intercepting ditch, excavate downward to form a primary road cut slope. At the position of the primary road cut slope near the intercepting ditch, drill multiple threaded holes at intervals. Through multiple bolts passing through multiple through holes and multiple threaded holes on the spiral guide layer, tighten them to lay the slope rapid flow structure.

[0060] Step 3: Construction of the water guide platform. The bottom surface of the water guide platform is excavated below the slope of the first-level road cut. Concrete grout is poured on the bottom surface to form the first and second sides of the water guide platform. Multiple buffer strips are poured on the first and second sides of the water guide platform. After the concrete grout has solidified, the water guide platform is formed.

[0061] Step 4: Excavate below the water guide platform to form a secondary road cut slope. Repeat steps 2 and 3 to form a multi-stage excavated roadbed. Excavate on one side of the multi-stage excavated roadbed to form a water collection pool.

[0062] Step 5: Connect the intercepting ditch and the water guide platform to the collection pool through the water guide pipe so that the water in the intercepting ditch and the water guide platform can be discharged into the collection pool.

[0063] To enable those skilled in the art to better understand the technical solution of the present invention, the following embodiments are provided for illustration:

[0064] like Figure 1-4 As shown, a drainage structure for deep-cut coastal roadbed construction includes:

[0065] Interception ditch 1 is configured above the first-level road cut slope 2; the interception ditch 1 is a concrete cuboid structure with a length of 100cm, a width of 60cm, and a height of 100cm; wherein, the interception ditch 1 is provided with a sedimentation layer 100 and a water interception layer 110, the distance between the sedimentation layer 100 and the uppermost opening of the interception ditch 1 is 30-50cm, and the water interception layer 110 is located below the sedimentation layer 100;

[0066] A water collection pool 3 is located on one side of a deep-cut roadbed along the coast; the water collection pool 3 is connected to the intercepting ditch 1 via a water pipe;

[0067] The slope rapid flow structure 4 is configured on the slope surfaces of the primary road cut slope 2 and the secondary road cut slope 6.

[0068] In this design, multiple threaded holes 120 are drilled at intervals on the primary road cut slope 2 near the intercepting ditch 1 and on the secondary road cut slope 6 near the guide platform 5. The slope rapid flow structure 4 includes a waterproof layer 400 and a spiral guide layer 410. The waterproof layer 400 is fitted to both the primary and secondary road cut slopes 2 and 6. The spiral guide layer 410 is disposed on the waterproof layer 400. The waterproof layer 400 and the spiral guide layer 410 are integrally formed. Multiple through holes 420 are spaced apart on the spiral guide layer 410. Multiple bolts engage with the multiple through holes 420 and the multiple threaded holes 120 to tightly attach the slope rapid flow structure 4 to the slope surface of the road cut slope 2 to form a... A temporary water interception and drainage structure; the lower end of the spiral guide layer 410 is flush with the lower end of the waterproof layer 400, and the upper end of the spiral guide layer 410 is a distance from the upper end of the waterproof layer 400, the length of which is greater than the diameter of one of the threaded holes 120; the spiral guide layer 410 is composed of multiple spiral guide grooves 411, and each spiral guide groove 411 has a spiral water-blocking structure 412 on both sides; wherein, the waterproof layer 400 is made of plastic material, and the spiral guide layer 410 is made of plastic material on the waterproof layer 400, and the spiral water-blocking structure 412 on both sides of the spiral guide groove 411 in the spiral guide layer 410 can be formed by plastic inflatable spiral strips;

[0069] A water guide platform 5 is configured between adjacent upper and lower road cut slopes. The water guide platform 5 includes a bottom surface 500, a first side surface 510, and a second side surface 520. The bottom surface 500 connects the first side surface 510 and the second side surface 520. Multiple buffer strips 530 are provided on both the first and second side surfaces 510 and 520. One end of each side surface 510 and 520 is sealed, while the other end is open and connected to the water collection tank 3 via a water guide pipe. Each buffer strip 530 has the same structure; for example, on the first side surface 510, the length of each buffer strip 530 is the same as the length of the first side surface 510. The structure of the second side surface 520 is symmetrical to that of the first side surface 510, and the multiple buffer strips on it have the same structure as those on the first side surface.

[0070] The construction method for the drainage structure in the coastal deep-excavation roadbed construction of this embodiment includes the following steps:

[0071] Step 1, Construction of Interception Ditch 1: A 100mm long concrete ditch is constructed at the top of the trench at the coastal deep-excavation roadbed construction site.

[0072] A concrete cuboid structure with a diameter of 1 cm, a width of 60 cm, and a height of 100 cm is provided. Reinforcing bars are installed on opposite sides at a distance of 30-50 cm from the top opening of the concrete cuboid structure to form a support structure for a sedimentation layer 100. The sedimentation layer 100 (made of stainless steel structural filter mesh) is fixed on the support structure. After the concrete cuboid structure has solidified, a drainage ditch 1 is formed.

[0073] Step 2, Protection of the Slope Rapid Flow Structure 4: In conjunction with the structure of the intercepting ditch 1, excavate downwards to form the primary road cut slope 2. On the primary road cut slope 2, near the intercepting ditch 1, drill multiple threaded holes 120 at intervals. Through multiple bolts passing through multiple through holes 420 on the spiral guide layer 410 and tightening them with the multiple threaded holes, the slope rapid flow structure 4 is laid. At the same time, the part of the waterproof layer 410 that is longer than the spiral guide layer 410 is inserted into the position below the connection point corresponding to the threaded hole 120, covering the connection point between the slope rapid flow structure 4 and the intercepting ditch 1, preventing rainwater from entering the slope surface of the primary road cut slope 2 through the gap between the two and eroding the slope surface.

[0074] Step 3, the construction of the water guide platform 5 includes: excavating below the first-level road cut slope 2 to form the bottom surface 500 of the water guide platform 5; pouring concrete slurry on the bottom surface 500 to form the first side 510 and the second side 520 of the water guide platform 5; pouring multiple buffer strips 530 on the first side 510 and the second side 520 of the water guide platform 5 (the buffer strips 530 are formed by erecting steel pipes to form the structural outline of the buffer strips 530 before pouring, wherein the diameter of the steel pipes is 48mm and the thickness is 3.5mm, and right-angle fasteners are used to fix the joints between the steel pipes); and the water guide platform 5 is formed after the concrete slurry has cured.

[0075] Step 4: Excavate below the water guide platform 5 to form a secondary roadbed slope. Drill multiple threaded holes 120 at intervals on the secondary roadbed slope 6 near the water guide platform 5. Repeat the remaining steps in Step 2 and Step 3 to form a multi-stage excavated roadbed. Excavate on one side of the multi-stage excavated roadbed and away from it to form a water collection pool 3. The water collection pool 3 is located at the side ditch outside the roadbed.

[0076] Step 5: Connect the intercepting ditch 1 and the water guiding platform 5 to the water collection tank 3 through the water guiding pipe so that the water in the intercepting ditch 1 and the water guiding platform 5 is discharged into the water collection tank 3.

[0077] The number of devices and processing scale described herein are for simplification of the invention. Applications, modifications, and variations of the drainage structure for coastal deep-excavation roadbed construction according to this invention will be readily apparent to those skilled in the art.

[0078] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A drainage structure for deep-excavation roadbed construction along the coast, characterized in that, include: A water interception ditch is installed above the slope of a primary road cut. The water interception ditch is provided with a sedimentation layer and a water interception layer. The distance between the sedimentation layer and the uppermost opening of the water interception ditch is 30-50 cm, and the water interception layer is located below the sedimentation layer. A water collection pool is located on one side of a deep-cut coastal roadbed, and the water collection pool is connected to the intercepting ditch via a water pipe. A slope rapid flow structure is configured on the slope surface of a multi-stage road cut. The slope rapid flow structure includes a waterproof layer and a spiral guide layer. The waterproof layer is fitted into the road cut slope, and the spiral guide layer is disposed on the waterproof layer. The waterproof layer and the spiral guide layer are integrally formed. The spiral guide layer has multiple through holes spaced apart. Multiple bolts are connected through the through holes to multiple threaded holes on the slope surface of the multi-stage road cut to tightly attach the slope rapid flow structure to the slope surface of the road cut to form a temporary water interception and drainage structure. The spiral guide layer has multiple spiral guide grooves, and each spiral guide groove has spiral water-blocking structures on both sides. The lower end of the spiral guide layer is flush with the lower end of the waterproof layer, and the upper end of the spiral guide layer is separated from the upper end of the waterproof layer by a distance greater than the diameter of one of the threaded holes.

2. The drainage structure for deep-cut coastal roadbed construction as described in claim 1, characterized in that, Also includes: A water guide platform is positioned between adjacent upper and lower road cut slopes; The water guide platform includes a bottom surface, a first side surface, and a second side surface. The bottom surface connects the first side surface and the second side surface. Multiple buffer strips are provided on both the first side surface and the second side surface. One end of the first side surface and the second side surface are sealed, and the other end is open and connected to the water collection tank through a water guide pipe.

3. The drainage structure for deep-cut coastal roadbed construction as described in claim 1, characterized in that, The intercepting ditch is a concrete cuboid structure with a length of 100 cm, a width of 60 cm, and a height of 100 cm.

4. The drainage structure for deep-cut coastal roadbed construction as described in claim 2, characterized in that, Each buffer bar has the same structure, and the length of each buffer bar is the same as the length of the first side.

5. A construction method for a drainage structure in a deep-cut coastal roadbed as described in claim 4, characterized in that, Includes the following steps: Step 1, Interception Ditch Construction: At the top of the deep excavation roadbed construction site along the coast, a concrete cuboid structure with a length of 100 cm, a width of 60 cm, and a height of 100 cm is poured. Reinforcing bars are installed on opposite sides at a distance of 30-50 cm from the top opening of the concrete cuboid structure to form a sand-sediment support structure, and the sand-sediment layer is fixed on the support structure. Wait for the concrete cuboid structure to solidify and form a drainage ditch; Step 2, slope rapid flow structure protection: Combined with the structure of the intercepting ditch, excavate downward to form a primary road cut slope. At the position of the primary road cut slope near the intercepting ditch, drill multiple threaded holes at intervals. Through multiple bolts passing through multiple through holes and multiple threaded holes on the spiral guide layer, tighten them to lay the slope rapid flow structure. Step 3: Construction of the water guide platform. The bottom surface of the water guide platform is excavated below the slope of the first-level road cut. Concrete grout is poured on the bottom surface to form the first and second sides of the water guide platform. Multiple buffer strips are poured on the first and second sides of the water guide platform. After the concrete grout has solidified, the water guide platform is formed. Step 4: Excavate below the water guide platform to form a secondary road cut slope. Repeat steps 2 and 3 to form a multi-stage excavated roadbed. Excavate on one side of the multi-stage excavated roadbed to form a water collection pool. Step 5: Connect the intercepting ditch and the water guide platform to the collection pool through the water guide pipe so that the water in the intercepting ditch and the water guide platform can be discharged into the collection pool.

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