Coastal drainage plate structure and construction method

Abstract

The invention discloses a coast drainage plate structure which comprises a water conveying plate body which is arranged above a sand cushion layer and is provided with a plurality of through holes penetrating into the sand cushion layer, an insertion hole is formed beside each through hole, an elastic clamping piece is arranged on the inner side of each insertion hole, a cavity is formed in the water conveying plate body, each insertion hole is communicated with the cavity, and each insertion hole is communicated with the corresponding elastic clamping piece. A water delivery hole communicated with the cavity is formed in the right side of the water delivery plate body and communicated with a water suction pump through a water delivery pipe, and a water retaining structure is arranged between each insertion hole and the bottom of the corresponding through hole; the composite drainage plates are arranged below the water conveying plate body and comprise drainage plate cores and coats covering the outsides of the drainage plate cores, the top ends of the composite drainage plates are inserted into the insertion holes and the cavities, and the bottom ends of the composite drainage plates penetrate into the coast soft soil base layer in the vertical direction; and the pressing component comprises a right-angle pressing plate and a T-shaped pressing plate. The invention further discloses a construction method of the coast drainage plate structure. Multiple pipeline joints, short pipelines and long pipelines do not need to be arranged, and time and labor are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of coastal construction, and more specifically, to a coastal drainage board structure and a construction method. Background Art

[0002] The construction environment of coastal engineering projects is relatively poor. The foundation of coastal engineering projects is mostly soft soil. During the construction process, the soft soil foundation needs to be reinforced to improve the foundation. The reinforcement methods include the traditional bagged manhole reinforcement method and the plastic drainage board reinforcement method.

[0003] The plastic drain board method is an underwater soft soil foundation treatment method that has emerged since the 1980s. Compared with the traditional bagged manhole reinforcement method, it has the advantages of light weight, strong toughness, high strength, uniform specifications, smooth drainage, low cost, and high construction efficiency. At present, the construction of the plastic drain board method includes: inserting the plastic drain board into the plug-in machine casing, using the specially customized bayonet at the lower end of the casing to clamp the lower end of the plastic drain board exposed, and at the same time tightening the upper end of the plastic drain board to make it taut and further produce vertical straightening phenomenon, moving the plug-in machine casing to make the casing and the plug-in number position vertically align with the predetermined setting position, slowly raising the specially made bayonet at the lower end of the plug-in machine casing will automatically open and automatically insert the plastic drain board in the pre-set soft soil base, cutting the upper end of the plastic drain board to expose the sand cushion layer for about 20 cm, and finally connecting the plastic drain board in the relative position with multiple pipes through the pipe connector to form a water supply pipe until the pipe is connected to the water collection tank or pump. However, since plastic drainage boards are set at multiple locations on the soft soil foundation, multiple pipe connectors and short pipes are required to connect all the plastic drainage pipes to each other, and a long pipe is formed between every two rows of plastic drainage boards. A pump is connected to each long pipe to pump water. This operation requires manual construction, which is time-consuming and labor-intensive. For example, the patent with application number 201520861709.0 discloses a direct-discharge differential vacuum preloading foundation treatment structure, which is composed of a sealing system, a vacuum treatment system and a soft soil foundation treatment system; the sealing system includes a sealing membrane and a geotextile; the vacuum treatment system includes a sand cushion layer, a filter tube and a vacuum pump; the soft soil foundation treatment system includes a soft soil foundation, a drainage board, an interlocking geogrid and a curtain wall. The geotextile is divided into three layers: upper, middle and lower, covering the sand cushion layer; the drainage board is connected to the filter tube through a connecting pipe, the filter tube is horizontally arranged in the sand cushion layer, and is connected to the vacuum pump through a main pipe. In this patent, the drainage board is connected to the filter pipe through a connecting pipe, the filter pipe is horizontally arranged in the sand cushion layer, and is connected to the vacuum pump through a main pipe. The construction of this structure requires a lot of manpower and material resources. Summary of the invention

[0004] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0005] Another object of the present invention is to provide a coastal drainage board structure, which is provided with a water conveying board body on a sand cushion layer, and the bottom ends of a plurality of composite drainage boards are inserted into a plurality of through holes of the water conveying board body and driven into the coastal soft soil base layer, and the top ends are inserted into the insertion holes to communicate with the cavity for drainage and water conveyance, thereby avoiding the problem of the traditional method of forming a long pipe between each drainage pipe through a plurality of pipe joints, short pipes, and between every two rows of plastic drainage boards, and each long pipe is connected to a water pump for pumping water, which is time-consuming and labor-intensive.

[0006] In order to achieve these purposes and other advantages according to the present invention, there is provided a coastal drainage board structure, comprising: A water conveying plate body is arranged above the sand cushion layer, and a plurality of through holes penetrating into the sand cushion layer are arranged on the water conveying plate body at intervals, wherein an insertion hole is opened on one side beside each through hole, and elastic clamping parts are arranged around the inner side of each insertion hole, and a cavity is arranged in the water conveying plate body, and each insertion hole is communicated with the cavity, and the bottom of the cavity gradually decreases from the left side to the right side of the water conveying plate body in a stepped manner, and a water conveying hole is arranged on the right side of the water conveying plate body, which is communicated with the cavity, and the water conveying hole is communicated with a water pump through a water conveying pipe, and a water retaining structure is arranged between each insertion hole and the bottom of each through hole, and the water retaining structure is arranged around the bottom of each through hole; A plurality of composite drain boards, which are distributed below the water conveying plate body, each composite drain board comprises a drain board core and an outer coat, the drain board core comprises a plurality of drain pipes, the outer coat is coated on the periphery of the plurality of drain pipes, the top end of each composite drain board passes through the sand cushion layer and each corresponding through hole and extends into the cavity through the insertion hole, the bottom end of each composite drain board is vertically penetrated and extends into the coastal soft soil base layer, so that the water in the coastal soft soil base layer is discharged into the cavity through the plurality of drain pipes, and the top end and the bottom end of each composite drain board are not closed; The pressing component includes a pair of right-angle pressing plates and a T-shaped pressing plate. The top of each right-angle pressing plate is pressed on two adjacent edges of the water conveying plate body, and the bottom is inserted into the coastal soft soil base tightly against the water conveying plate body. The two ends of the horizontal part of the T-shaped pressing plate are fixed to the opposite edges of a pair of right-angle pressing plates by bolts, and the vertical part is fixed on the water conveying plate body.

[0007] Preferably, wherein Multiple drain pipes include: A plurality of concave drainage pipes are distributed in the middle of the drainage board core, and each concave drainage pipe has a concave cross-section with openings at both ends; A pair of straight drain pipes are symmetrically distributed on both sides of the plurality of concave drain pipes; A pair of cross-shaped drainage pipe groups, which are symmetrically distributed on both sides of a pair of linear drainage pipes, each cross-shaped drainage pipe group includes a plurality of cross-shaped drainage pipes whose vertical parts are connected end to end from top to bottom, one end of the horizontal part of each cross-shaped drainage pipe is connected to the coastal soft soil base, and the other end is connected to the adjacent linear drainage pipe; Among them, the concave drain pipe and the straight drain pipe, as well as adjacent concave drain pipes are connected by flexible connectors, and the outer coat is wrapped around the periphery of multiple concave drain pipes, a pair of straight drain pipes and a pair of cross-shaped drain pipe groups so that the multiple drain pipes and the outer coat form an integrated structure to form a composite drainage board.

[0008] Preferably, each drainage board core further comprises: A pair of mud-retaining and water-permeable components are distributed on both sides of the drainage board core and connected to a plurality of cross-shaped drainage pipes to cover one end of the horizontal portion of each cross-shaped drainage pipe to prevent the soft soil of the coastal soft soil base from blocking the cross-shaped drainage pipe.

[0009] Preferably, a pair of cross-shaped drainage pipe groups, a pair of straight-line drainage pipes, and the bottom ends of the plurality of concave drainage pipes are all provided with a water-permeable membrane.

[0010] Preferably, an exhaust hole is also provided on the water conveying plate body, and the exhaust hole is connected to the air pump through an exhaust valve.

[0011] Preferably, a load-bearing layer is provided on the top of the T-shaped pressure plate, and the load-bearing layer is a concrete layer, and the thickness of the concrete layer is 80 cm.

[0012] The present invention is further implemented by a construction method of a coastal drainage board structure, and the construction method of the coastal drainage board structure comprises the following steps: Step 1: Lay a sand cushion layer on the soft coastal base to a thickness of 50 cm, and lay a water conveying plate on the sand cushion layer; Step 2: Insert the composite drainage board into the casing from the casing opening of the board inserting machine. The bottom end of the composite drainage board is fixed on the pin at the bottom of the casing. At the same time, tighten the composite drainage board, align the board inserting machine with a through hole, drive the composite drainage board vertically downward toward the coastal soft soil base through the casing until the designed depth, pull up and withdraw the casing, and the composite drainage board remains in the coastal soft soil by relying on the pressure of the coastal soft soil. Cut off the top of the composite drainage board so that it is exposed 15 cm from the sand cushion layer, insert the top of the composite drainage board into the insertion hole corresponding to the through hole, and clamp it with an elastic clamp. Repeat the above operation until all through holes on the water supply plate body are inserted with composite drainage boards, wherein the verticality of the board inserting machine is not greater than 1.5%; Step 3, a pair of right-angled pressing plates are fixed around the water conveying plate body, the top of each right-angled pressing plate is pressed on two adjacent edges of the water conveying plate body, and is fixed to the water conveying plate body by bolts, and the bottom of each right-angled pressing plate is inserted into the coastal soft soil base closely against the water conveying plate body, and the vertical part of the T-shaped pressing plate is fixed by bolts at the center position of the water conveying plate body, and the horizontal part of the T-shaped pressing plate is fixed by bolts on the opposite sides of a pair of right-angled pressing plates; Step 4: Arrange a load layer on the top of the T-shaped pressing plate, wherein the length of the load layer is the same as the length of the horizontal portion of the T-shaped pressing plate; Step 5: connect the water delivery hole on the water delivery plate body to the water pump through the water delivery pipe, and connect the exhaust hole on the water delivery plate body to the air pump through the exhaust pipe and the exhaust valve.

[0013] The present invention has at least the following beneficial effects: 1. The coastal drainage board structure of the present invention is provided with a water conveying board body on a sand cushion layer, and the bottom ends of a plurality of composite drainage boards are inserted into a plurality of through holes of the water conveying board body and driven into the coastal soft soil base layer, and the top ends are inserted into the insertion holes to communicate with the cavity for drainage and water delivery, thereby avoiding the time-consuming and labor-intensive problem that a plurality of pipe joints and short pipes are required between each drainage pipe, and a long pipe is formed between every two rows of plastic drainage boards, and each long pipe is connected to a water pump for pumping water.

[0014] 2. The composite drainage board in the coastal drainage board structure of the present invention has a cross-shaped drainage pipe group on both sides of the drainage board core and a concave drainage pipe in the middle, which can not only improve the transverse and longitudinal water permeability of the composite drainage pipe, but also improve the compressive resistance of the composite drainage board.

[0015] 3. Mud-retaining and water-permeable components are arranged on both sides of the composite drainage board in the coastal drainage board structure of the present invention, and a water-permeable membrane is arranged at the bottom to prevent mud in the soft coastal soil from clogging the drainage pipe and affecting the permeability and water flow.

[0016] 4. The coastal drainage board structure of the present invention improves the bearing capacity of the coastal soft soil foundation by arranging the pressing components and the load layer, accelerates the drainage and consolidation of the coastal soft soil base, shortens the consolidation time, and improves the construction efficiency.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a coastal drainage board structure in a technical solution of the present invention; Figure 2 It is a structural schematic diagram of a drainage board core in a technical solution of the present invention; Figure 3 It is a structural schematic diagram of a water delivery plate body in a technical solution of the present invention; Figure 4 It is a transverse cross-sectional view of the position of the through hole on the water conveying plate body in another technical solution of the present invention; Figure 5 It is a vertical cross-sectional view at the position of the through hole on the water conveying plate body in another technical solution of the present invention; Figure 6 It is a structural schematic diagram of a cross-shaped drainage pipe group in another technical solution of the present invention; Figure numerals: 1: water delivery plate body, 100: through hole, 110: insertion hole, 120: cavity, 130: water delivery hole, 140: exhaust hole, 2: sand cushion layer, 3: composite drainage board, 300: drainage board core, 301: cross-type drainage pipe group, 302: straight drainage pipe, 303: concave drainage pipe, 305: mud-retaining water-permeable component, 306: water-permeable membrane, 307: flexible connector, 308: cross-type drainage pipe, 4: pressed component, 400: right-angle pressure plate, 410: T-type pressure plate, 5: exhaust valve, 6: vacuum pump, 7: load layer, 8: water retaining structure. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0020] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0021] like Figures 1 to 5 As shown, the present invention provides a coastal drainage board structure, comprising: A water conveying plate body 1 is arranged above the sand cushion layer 2. A plurality of through holes 100 penetrating into the sand cushion layer 2 are arranged at intervals on the water conveying plate body 1, wherein an insertion hole 110 is opened on one side of each through hole 100, and elastic clamping members are arranged around the inner side of each insertion hole 110. A cavity 120 is arranged in the water conveying plate body 1, and each insertion hole 110 is communicated with the cavity 120. The bottom of the cavity 120 gradually decreases from the left side to the right side of the water conveying plate body 1 in a stepped manner. A water conveying hole 130 is arranged on the right side of the water conveying plate body 1, which is communicated with the cavity 120. The water conveying hole 130 is communicated with a water pump through a water conveying pipe. A water retaining structure 8 is arranged between each insertion hole 110 and the bottom of each through hole 100, and the water retaining structure 8 is arranged around the bottom of each through hole 100; A plurality of composite drain boards 3 are distributed below the water conveying board body 1. Each composite drain board 3 includes a drain board core 300 and an outer layer. The drain board core 300 includes a plurality of drain pipes. The outer layer is wrapped around the periphery of the plurality of drain pipes. The top of each composite drain board 3 passes through the sand cushion layer 2 and each corresponding through hole 100 and extends into the cavity 120 through the insertion hole 110. The bottom of each composite drain board 3 is vertically penetrated and extends into the coastal soft soil base layer, so that the water in the coastal soft soil base layer is discharged into the cavity 120 through the plurality of drain pipes. The top and bottom of each composite drain board 3 are not closed. The pressing member 4 includes a pair of right-angle pressing plates 400 and a T-shaped pressing plate 410. The top of each right-angle pressing plate 400 is pressed on two adjacent edges of the water conveying plate body 1, and the bottom is inserted into the coastal soft soil base close to the water conveying plate body 1. The two ends of the horizontal part of the T-shaped pressing plate 410 are fixed to the opposite edges of a pair of right-angle pressing plates 400 by bolts, and the vertical part is fixed on the water conveying plate body 1.

[0022] In the above technical solution, the coastal drainage board structure includes a water conveying board body 1, a plurality of composite drainage boards 3 and a pressing member 4. The bottom of each composite drainage board 3 is inserted vertically downward into the coastal soft soil base after passing through a through hole 100 on the water conveying board body 1, and the top is inserted into the insertion hole 110 to communicate with the cavity 120. The top and bottom ends of each composite drainage board 3 are not closed, so that the composite drainage board has good drainage and water permeability, so that multiple good drainage channels are formed in the coastal soft soil base. By continuously pressurizing the sand cushion layer 2, part of the water in the coastal soft soil base is discharged into the cavity 120 through the plurality of composite drainage boards 3, and the other part is discharged through the sand cushion layer 2 to absorb moisture, thereby accelerating the drainage and consolidation of the coastal soft soil base, so that the bearing capacity of the coastal soft soil base is enhanced. This technical solution avoids the problem that each drainage pipe needs to be connected through multiple pipe joints, short pipes, and a long pipe is formed between every two rows of plastic drainage boards. Each long pipe is connected to a water pump for pumping water, which not only consumes a lot of materials but is also time-consuming and labor-intensive.

[0023] Among them, the water conveying plate body 1 can be made of pressure-resistant plastic material, such as a hard PVC board structure made of polyvinyl chloride material. The water conveying plate body 1 is a hollow cubic structure. The thickness of each side board of the water conveying plate body 1 is 20 to 30 mm. According to the requirements of compressive performance, multiple layers of hard PVC boards, such as two or three layers, can be used on each side of the water conveying plate body 1. The water conveying plate body 1 is provided with a plurality of through holes 100 at intervals, each through hole 100 penetrates from the top of the water conveying plate body 1 to the sand cushion layer 2, an insertion hole 110 is provided on one side of each through hole 100, a water retaining structure 8 is provided between each insertion hole 110 and the bottom of each through hole 100, and the water retaining structure 8 is arranged around the bottom of each through hole 100; the water retaining structure 8 can also be made of the same pressure-resistant plastic material as the water conveying plate body 1, and is arranged around the bottom of each through hole 100 to prevent the water discharged from the composite drainage board 3 from flowing into the outside of the water conveying plate body 1 through the through hole 100, so that the water discharged from the composite drainage board 3 is in the cavity 120, and due to the characteristic of the cavity 120 being higher on the left and lower on the right, the water automatically flows from the left side of the cavity 120 into the water conveying hole on the right side, and then is pumped out of the cavity through the water conveying pipe. The drainage board core 300 is a plastic structure formed of hardened polyvinyl chloride or polypropylene material, and the outer layer is a fiber structure, which does not affect the drainage performance of the drainage board core 300, but can play a role in retaining soil.

[0024] During construction, the site is first cleaned, garbage and other debris are removed, and the settlement observation equipment is photographed to conduct horizontal displacement and settlement observation. The sand cushion layer 2 is laid to a thickness of 50 cm and then leveled. The sand cushion layer is made of coarse gravel sand with a bearing capacity of 240 KPa and a mud content of less than 4%. The water delivery plate body 1 is laid on the sand cushion layer 2, and the composite drainage board 3 is inserted into the casing from the casing opening of the plate plugging machine. The bottom end of the composite drainage board 3 is fixed to the pin at the bottom of the casing. At the same time, the composite drainage board 3 is tightened, and the plate plugging machine is aligned with a through hole 100. The composite drainage board 3 is driven vertically downward toward the coastal soft soil base through the casing. The vibration hammer is started to insert and hit, and the insertion speed is controlled at 10 m / min until the designed depth is reached. The casing is pulled up and pulled out, and the pin at the bottom of the casing will open automatically. The composite drainage board 3 relies on the pressure of the coastal soft soil to remain in the coastal soft soil. The top of the composite drainage board 3 is cut off so that the length exposed from the sand cushion layer 2 is 15 cm, insert the top of the composite drainage board 3 into the insertion hole 110 of the corresponding through hole 100, clamp it with an elastic clamp, and repeat the above operation until all the through holes 100 on the water conveying plate body 1 are inserted with the composite drainage board 3, wherein the verticality of the plate inserting machine is not greater than 1.5%; fix a pair of right-angle pressing plates 400 around the water conveying plate body 1, the top of each right-angle pressing plate 400 is pressed on two adjacent edges of the water conveying plate body 1, and is fixed to the water conveying plate body 1 by bolts, and the bottom of each right-angle pressing plate 400 is closely attached to the water conveying plate body 1 and inserted into the coastal soft soil base, and the vertical part of the T-shaped pressing plate 410 is fixed by bolts at the center position of the water conveying plate body 1, and the horizontal part of the T-shaped pressing plate 410 is fixed by bolts on the opposite sides of a pair of right-angle pressing plates 400; connect the water conveying hole 130 on the water conveying plate body 1 with the water pump through a water conveying pipe. Wherein, a pair of right-angled pressing plates 400 and a T-shaped pressing plate 410 are made of reinforced concrete.

[0025] In another technical solution, the plurality of drainage pipes include: A plurality of concave drainage pipes 303 are distributed in the middle of the drainage board core 300, and each concave drainage pipe 303 has a concave cross-section with openings at both ends; A pair of straight drainage pipes 302, which are symmetrically distributed on both sides of the plurality of concave drainage pipes 303; A pair of cross-shaped drainage pipe groups 301, which are symmetrically distributed on both sides of a pair of straight-line drainage pipes 302, each cross-shaped drainage pipe group 301 includes a plurality of cross-shaped drainage pipes 308 with vertical parts connected end to end from top to bottom, one end of the horizontal part of each cross-shaped drainage pipe 308 is connected to the coastal soft soil base, and the other end is connected to the adjacent straight-line drainage pipe 302; Among them, the concave drain pipe 303 and the straight drain pipe 302, as well as the adjacent concave drain pipes 303 are connected by a flexible connector 307, and the outer coat is wrapped around the outer circumference of multiple concave drain pipes 303, a pair of straight drain pipes 302 and a pair of cross-shaped drain pipe groups 301, so that the multiple drain pipes and the outer coat form an integrated structure to form a composite drainage board 3.

[0026] In the above technical solution, the two sides of the drainage board core 300 are cross-shaped drainage pipe groups 301 and the middle is a concave drainage pipe 303. Each cross-shaped drainage pipe group 301 includes multiple cross-shaped drainage pipes 308 from top to bottom. One end of the horizontal part of the cross-shaped drainage pipe 308 is connected to the coastal soft soil base, and the other end is connected to the adjacent straight drainage pipe 302, so that the formed composite drainage board 3 can not only discharge the water flowing in the vertical direction of the coastal soft soil base, but also discharge the water flowing in the horizontal direction of the coastal soft soil base through the horizontal parts of the multiple cross-shaped drainage pipes 308, thereby improving the transverse and longitudinal permeability and water permeability of the composite drainage pipe. By arranging multiple concave drainage pipes in the middle and cooperating with the cross-shaped drainage pipe groups 301 on both sides, the horizontal and vertical compressive resistance of the composite drainage board is improved. The concave drainage pipe 303, the straight drainage pipe 302, the cross drainage pipe group 301, and the drainage board core 300 are all plastic structures formed by specially treated hardened polyvinyl chloride or polypropylene materials. The longitudinal water permeability of the composite drainage board 3 is higher than 30×10 3 mm 3 / s, and the lateral water permeability is higher than 10×10 3 mm 3 / s.

[0027] In another technical solution, each drainage board core 300 further includes: A pair of mud-retaining water-permeable components 305 are distributed on both sides of the drainage board core 300 and connected to a pair of cross-shaped drainage pipe groups 301 to cover one end of the horizontal part of each cross-shaped drainage pipe 308 to prevent the soft soil of the coastal soft soil base from clogging the cross-shaped drainage pipe 308.

[0028] In the above technical solution, mud-retaining and water-permeable components 305 are provided on both sides of the drainage board core 300 of the composite drainage board 3 to cover one end of the horizontal portion of each cross-shaped drainage pipe 308, thereby preventing mud in the soft coastal soil from clogging the cross-shaped drainage pipe 308 and affecting the permeability and water flow. The mud-retaining and water-permeable components 305 are mud-retaining and water-permeable structures made of propylene or polyester materials, which are glued to one end of the horizontal portion of the cross-shaped drainage pipe 308 to cover one end of the horizontal portion of multiple cross-shaped drainage pipes 308.

[0029] In another technical solution, a pair of cross-shaped drainage pipes 301 , a pair of straight-line drainage pipes 302 , and a plurality of concave drainage pipes 303 are all provided with a water-permeable membrane 306 at their bottom ends.

[0030] In the above technical solution, a water-permeable membrane 306 is provided at the bottom of the plurality of drainage pipes to prevent the mud in the soft soil of the coast from clogging the drainage pipes and affecting the water permeability and water flow. The water-permeable membrane 306 is a water-permeable geotextile synthetic material with a breaking elongation of 30-60%.

[0031] In another technical solution, an exhaust hole is further provided on the water conveying plate body 1 , which is connected to the air pump 6 through the exhaust valve 5 .

[0032] In the above technical solution, in order to accelerate the consolidation speed of the coastal soft soil base and shorten the construction period, the exhaust valve 5 can be opened, and the vacuum pump 6 can be used to vacuum the cavity 120, so that the water in the coastal soft soil base can be quickly discharged into the cavity 120 through the composite drainage board 3, thereby accelerating the settlement and consolidation speed of the coastal soft soil base. If vacuuming is not used to accelerate consolidation, the exhaust valve 5 can be closed.

[0033] In another technical solution, a load layer 7 is provided on the top of the T-shaped pressure plate 410. The load layer 7 is a concrete layer, and the thickness of the concrete layer is 80 cm.

[0034] In the above technical solution, by setting the load layer 7 on the top of the T-shaped pressure plate 410, the bearing capacity of the coastal soft soil foundation is improved, the drainage and consolidation of the coastal soft soil base is accelerated, the consolidation time is shortened, and the construction efficiency is improved.

[0035] This technical solution may also include the following technical details to better achieve the technical effect: A construction method of a coastal drainage board structure comprises the following steps: Step 1: Lay a sand cushion layer 2 on the soft coastal base to a thickness of 50 cm, and lay a water conveying plate body 1 on the sand cushion layer 2; Step 2: insert the composite drainage board 3 into the casing from the casing opening of the board inserting machine, fix the bottom end of the composite drainage board 3 on the pin at the bottom of the casing, tighten the composite drainage board 3 at the same time, align the board inserting machine with a through hole, drive the composite drainage board 3 vertically downward toward the coastal soft soil base through the casing until the designed depth, pull up and extract the casing, the composite drainage board 3 remains in the coastal soft soil by relying on the pressure of the coastal soft soil, cut off the top of the composite drainage board 3, so that the length exposed from the sand cushion layer 2 is 15 cm, insert the top of the composite drainage board 3 into the insertion hole 110 corresponding to the through hole 100, clamp it with an elastic clamp, repeat the above operation until all the through holes 100 on the water conveying plate body 1 are inserted with the composite drainage board 3, wherein the verticality of the board inserting machine is not greater than 1.5%; Step 3, a pair of right-angled pressing plates 400 are fixed around the water conveying plate body 1, the top of each right-angled pressing plate 400 is pressed on two adjacent edges of the water conveying plate body 1, and is fixed to the water conveying plate body 1 by bolts, and the bottom of each right-angled pressing plate 400 is closely attached to the water conveying plate body 1 and inserted into the coastal soft soil base, and the vertical part of the T-shaped pressing plate 410 is fixed by bolts at the center position of the water conveying plate body 1, and the horizontal part of the T-shaped pressing plate 410 is fixed by bolts on the opposite sides of a pair of right-angled pressing plates 400; Step 4: Arrange a load layer 7 on the top of the T-shaped pressing plate 410 , wherein the length of the load layer 7 is the same as the length of the horizontal portion of the T-shaped pressing plate 410 ; Step 5: connect the water delivery hole 130 on the water delivery plate body 1 to the water pump through the water delivery pipe, and connect the exhaust hole on the water delivery plate body 1 to the air pump 6 through the exhaust pipe and the exhaust valve 5.

[0036] In the above technical solution, the bottom of the composite drainage board 3 is inserted vertically downward into the coastal soft soil base after passing through a through hole 100 on the water conveying plate body 1, and the top is inserted into the insertion hole 110 to communicate with the cavity 120, so that multiple good drainage channels are formed in the coastal soft soil base. By pressing a right-angle pressure plate 400 and a T-shaped pressure plate 410 on the water conveying plate body 1, and arranging a load layer 7 on the T-shaped pressure plate 410, the water conveying plate body 1 is continuously pressurized to increase the bearing capacity of the coastal soft soil base, accelerate the rapid discharge of water in the coastal soft soil base from the composite drainage board 3, accelerate the drainage and consolidation of the coastal soft soil base, shorten the consolidation time, and improve the construction efficiency. At the same time, the exhaust hole is opened through the exhaust valve 5 and the cavity 120 is vacuumed by the vacuum pump 6, which further accelerates the drainage rate of the composite drainage board 3 and the drainage and consolidation of the coastal soft soil base. The water discharged into the cavity 120 is pumped out from the water delivery hole 130 by the water pump for other construction water or discharged into the collection pool around the construction.

[0037] Among them, in step 2, strict control should be exercised to avoid the phenomenon of composite drainage board back-drafting, and the back-draft length should be controlled not to exceed 4% of the total insertion length. The settlement and displacement conditions caused by drainage consolidation of the coastal soft soil base after ballasting should be observed regularly through settlement equipment, and the measurement and control data formed by the observation should be analyzed to optimize the construction process.

[0038] The number of equipment and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the coastal drainage board structure of the present invention will be obvious to those skilled in the art.

[0039] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Coastal drainage board structure, characterized in that: include: A water conveying plate body is arranged above the sand cushion layer, and a plurality of through holes penetrating into the sand cushion layer are arranged on the water conveying plate body at intervals, wherein an insertion hole is opened on one side beside each through hole, and elastic clamping parts are arranged around the inner side of each insertion hole, and a cavity is arranged in the water conveying plate body, and each insertion hole is communicated with the cavity, and the bottom of the cavity gradually decreases from the left side to the right side of the water conveying plate body in a stepped manner, and a water conveying hole is arranged on the right side of the water conveying plate body, which is communicated with the cavity, and the water conveying hole is communicated with a water pump through a water conveying pipe, and a water retaining structure is arranged between each insertion hole and the bottom of each through hole, and the water retaining structure is arranged around the bottom of each through hole; A plurality of composite drain boards, which are distributed below the water conveying plate body, each composite drain board comprises a drain board core and an outer coat, the drain board core comprises a plurality of drain pipes, the outer coat is coated on the periphery of the plurality of drain pipes, the top end of each composite drain board passes through the sand cushion layer and each corresponding through hole and extends into the cavity through the insertion hole, the bottom end of each composite drain board is vertically penetrated and extends into the coastal soft soil base layer, so that the water in the coastal soft soil base layer is discharged into the cavity through the plurality of drain pipes, and the top end and the bottom end of each composite drain board are not closed; The pressing component includes a pair of right-angle pressing plates and a T-shaped pressing plate. The top of each right-angle pressing plate is pressed on two adjacent edges of the water conveying plate body, and the bottom is inserted into the coastal soft soil base tightly against the water conveying plate body. The two ends of the horizontal part of the T-shaped pressing plate are fixed to the opposite edges of a pair of right-angle pressing plates by bolts, and the vertical part is fixed on the water conveying plate body.

2. The coastal drainage board structure according to claim 1, characterized in that: Multiple drain pipes include: A plurality of concave drainage pipes are distributed in the middle of the drainage board core, each concave drainage pipe has a concave cross-section and is open at both ends; A pair of straight drain pipes are symmetrically distributed on both sides of the plurality of concave drain pipes; A pair of cross-shaped drainage pipe groups, which are symmetrically distributed on both sides of a pair of linear drainage pipes, each cross-shaped drainage pipe group includes a plurality of cross-shaped drainage pipes whose vertical parts are connected end to end from top to bottom, one end of the horizontal part of each cross-shaped drainage pipe is connected to the coastal soft soil base, and the other end is connected to the adjacent linear drainage pipe; Among them, the concave drain pipe and the straight drain pipe, as well as adjacent concave drain pipes are connected by flexible connectors, and the outer coat is wrapped around the periphery of multiple concave drain pipes, a pair of straight drain pipes and a pair of cross-shaped drain pipe groups so that the multiple drain pipes and the outer coat form an integrated structure to form a composite drainage board.

3. The coastal drainage board structure according to claim 2, characterized in that: Each drainage board core also includes: A pair of mud-retaining and water-permeable components are distributed on both sides of the drainage board core and connected to a plurality of cross-shaped drainage pipes to cover one end of the horizontal portion of each cross-shaped drainage pipe to prevent the soft soil of the coastal soft soil base from blocking the cross-shaped drainage pipe.

4. The coastal drainage board structure according to claim 3, characterized in that: A pair of cross-shaped drainage pipe groups, a pair of straight-line drainage pipes, and the bottom ends of a plurality of concave drainage pipes are all provided with water-permeable membranes.

5. The coastal drainage board structure according to claim 4, characterized in that: An exhaust hole is also provided on the water conveying plate body, and the exhaust hole is communicated with the air pump through an exhaust valve.

6. The coastal drainage board structure according to claim 5, characterized in that: A load layer is provided on the top of the T-shaped pressure plate, and the load layer is a concrete layer, and the thickness of the concrete layer is 80 cm.

7. The construction method of the coastal drainage board structure according to claim 6, characterized in that: The steps include: Step 1: Lay a sand cushion layer on the soft coastal base to a thickness of 50 cm, and lay a water conveying plate on the sand cushion layer; Step 2: Insert the composite drainage board into the casing from the casing opening of the board inserting machine. The bottom end of the composite drainage board is fixed on the pin at the bottom of the casing. At the same time, tighten the composite drainage board, align the board inserting machine with a through hole, drive the composite drainage board vertically downward toward the coastal soft soil base through the casing until the designed depth, pull up and withdraw the casing, and the composite drainage board remains in the coastal soft soil by relying on the pressure of the coastal soft soil. Cut off the top of the composite drainage board so that it is exposed 15 cm from the sand cushion layer, insert the top of the composite drainage board into the insertion hole corresponding to the through hole, and clamp it with an elastic clamp. Repeat the above operation until all through holes on the water supply plate body are inserted with composite drainage boards, wherein the verticality of the board inserting machine is not greater than 1.5%; Step 3, a pair of right-angled pressing plates are fixed around the water conveying plate body, the top of each right-angled pressing plate is pressed on two adjacent edges of the water conveying plate body, and is fixed to the water conveying plate body by bolts, and the bottom of each right-angled pressing plate is inserted into the coastal soft soil base closely against the water conveying plate body, and the vertical part of the T-shaped pressing plate is fixed by bolts at the center position of the water conveying plate body, and the horizontal part of the T-shaped pressing plate is fixed by bolts on the opposite sides of a pair of right-angled pressing plates; Step 4: Arrange a load layer on the top of the T-shaped pressing plate, wherein the length of the load layer is the same as the length of the horizontal portion of the T-shaped pressing plate; Step 5: connect the water delivery hole on the water delivery plate body to the water pump through the water delivery pipe, and connect the exhaust hole on the water delivery plate body to the air pump through the exhaust pipe and the exhaust valve.

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