A shore-approaching drainage pipe system and a construction method thereof

Abstract

The application provides a kind of coastal water drainage pipeline system and its construction method, the system includes: base leveling foundation, dike cofferdam, partition, filler, underwater pile foundation, positioning pile head, platform beam plate, pier, pipeline, drainage head; Base leveling foundation is built on underwater foundation; Dike cofferdam is built on base leveling foundation, and dike cofferdam is composed of several caissons; Partition is arranged in the caisson, and the internal space of the caisson is divided into several areas, and at least one pipeline installation area is included in the several areas, and the pipeline installation area forms a through channel from the land side to the water side by opening a door hole on the partition and the caisson wall; The filler is filled in the non-pipeline installation area; The platform beam plate is erected on the underwater pile foundation through the positioning pile head, and one side of the platform beam plate is connected with the through channel; The platform beam plate forms a guide path area; The pipeline is arranged along the through channel to the guide path area, and a plurality of drainage heads are connected on the underwater pipeline section.

Description

Technical Field

[0001] This invention relates to the field of onshore water intake and drainage technology, and in particular to an onshore water intake and drainage pipeline system and its construction method. Background Technology

[0002] Many engineering projects, such as power plants and waterworks, require significant water intake and drainage from water bodies during operation. Therefore, these projects are often located along riverbanks or coastlines to secure a stable water source. Current technologies for onshore water intake pipelines typically involve constructing them using dikes, submerged pipe installations, or tunnel boring machines (TBMs) to jack up the pipeline within the underwater soil. These existing onshore water intake pipeline systems are suitable for areas with gentle geological profiles and soft strata. However, some areas along rivers or coastlines have steep slopes and hard geological conditions, such as the rocky coastlines found along my country's coastlines from south to north. These geological areas are not suitable for the current methods of constructing pipelines within the underwater soil. From a safety perspective, these geological areas are suitable for the main body of the project, but not for constructing water intake and drainage structures using conventional methods such as submerged pipe installations, tunnel boring machines, or TBMs. This poses challenges to design and construction and may even affect project site selection. Summary of the Invention

[0003] This invention was developed to address the aforementioned problems, and aims to provide a shore-based water intake and drainage pipeline system and its construction method suitable for areas with steep slopes and hard geology.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This invention provides a shore-based water intake and drainage pipeline system, characterized by comprising: a leveling foundation, a protective dike and cofferdam, a partition wall, fill material, underwater pile foundations, positioning pile heads, platform beams and slabs, piers, pipelines, and water intake / drainage heads; wherein, the leveling foundation is constructed on an underwater foundation; the protective dike and cofferdam are constructed on the leveling foundation and are composed of several box-type structures arranged side by side; the partition wall is located within the box-type structures, dividing the internal space of the box-type structures into several areas, including at least one pipeline installation area, the pipeline installation area being formed by opening doorways in the partition wall and the box-type structure walls to allow access from land. A through-passage extends from the side to the water side; filler is placed in the non-pipeline installation area inside the box-type structure; several underwater pile foundations are arranged in several rows on the water side and inserted into the underwater foundation; the platform beam is erected on the underwater pile foundations through positioning pile heads, and one side of the platform beam is connected to the through-passage; several piers are arranged in two rows on the platform beam, so that the platform beam forms a guide channel area between the two rows of piers; the pipeline is set along the through-passage to the guide channel area, the end of the pipeline on the water side is the sealed end, the end of the pipeline on the land side is the open end, and several water intake and drainage heads are connected to the pipeline section on the underwater side.

[0006] Furthermore, the onshore water intake and drainage pipeline system provided by the present invention may also have the following feature: the pipeline section set on the platform beam is fixed by a limiting component.

[0007] Furthermore, the onshore intake and drainage pipeline system provided by the present invention may also have the following features: wherein the limiting component includes a pressing structure pressing on the surface of the pipeline and bolt fasteners fixing the two sides of the pressing structure to the platform beam plate.

[0008] Furthermore, the onshore water intake and drainage pipeline system provided by the present invention may also have the following features: the pipeline is composed of several pipe sections, the last pipe section located on the water side is a pipe section with one end sealed, and adjacent pipe sections are connected by flanges and bolts.

[0009] Furthermore, the onshore water intake and drainage pipeline system provided by the present invention may also have the following feature: wherein a sealing and water-stopping device is provided at each doorway of the pipeline.

[0010] 7. The present invention provides a construction method for the above-mentioned onshore water intake and drainage pipeline system, characterized by comprising the following steps:

[0011] Step 1: Construct a level foundation on the underwater ground to create a flat upper surface;

[0012] Step 2: Construct a protective dike and cofferdam on a leveled foundation. The protective dike and cofferdam consists of several box-shaped structures arranged side by side. Partition walls are built inside the box-shaped structures to separate them. Door openings are reserved for corresponding through passages on the partition walls and box-shaped structures. The door openings are temporarily sealed.

[0013] Step 3: Fill the non-pipe installation area inside the box structure with filler;

[0014] Step 4: Install a sealing and waterproofing device at the doorway.

[0015] Step 5: Construct underwater pile foundations, reserving installation positions for positioning pile heads at the head of the underwater pile foundations;

[0016] Step 6: Precast slabs and precast beams that form the platform beams and slabs, and then cast them on site to complete the erection and installation of the platform beams and slabs;

[0017] Step 7: Install the supporting equipment for pipe jacking on the land side;

[0018] Step 8, Install the landside pipeline: The pipeline passes through the doorways one by one. When it passes through a doorway facing the water, the temporary underwater blockage is broken from the outside.

[0019] Step 9, Install the water-side pipe: The pipe continues to be pushed forward in the water;

[0020] Step 10: After jacking is completed, install the water intake and drainage heads on the water-side pipe section and limit the pipe movement.

[0021] Furthermore, the construction method provided by the present invention may also have the following feature: the box structure is constructed by casting in place in a water-filled foundation pit using caissons or steel sheet piles and steel pipe piles.

[0022] Furthermore, the construction method provided by the present invention may also have the following feature: step 6, when manufacturing the precast slab, further includes performing a friction reduction process on the surface of the precast slab.

[0023] Furthermore, the construction method provided by the present invention may also have the following feature: when installing the water-side pipe in step 9, a counterweight is added inside the pipe.

[0024] The function and effects of this invention:

[0025] The shore-based water intake and drainage pipeline system provided by this invention eliminates the need for submerged pipe laying from underwater soil layers. Instead, the underwater pipeline section is erected using underwater pile foundations, positioning pile heads, and platform beams. Piers and limiting components ensure the pipeline's structural stability in the water, preventing displacement due to water flow. Furthermore, a stable dike is constructed on the landside using a leveled foundation, revetment, cofferdam, partition walls, and fill material. The partition walls' zoned design allows for containment of seepage within designated areas in case of leakage. These structural features make this shore-based water intake and drainage pipeline system well-suited for areas with steep slopes and hard geology, such as coastal rock foundations. Additionally, this system is also applicable to areas with softer geology, such as soil and sand foundations, demonstrating its wide applicability.

[0026] This invention provides a construction method, including the implementation of concrete structure embankments, underwater platforms, and multiple water-stopping processes, to ensure that pipelines on steep slopes can be safely jacked into the water directly. This construction method can be applied to situations where conventional underground pipe jacking and shield tunneling are not feasible. Attached Figure Description

[0027] Figure 1 This is a schematic elevation view of the onshore water intake and drainage pipeline system in an embodiment of the present invention.

[0028] Figure 2 This is a plan view of the onshore water intake and drainage pipeline system in an embodiment of the present invention;

[0029] Figure 3 This corresponds to the onshore water intake and drainage pipeline system in this embodiment of the invention. Figure 1 A schematic diagram of the cross-section of BB.

[0030] Figure 4 This is a schematic diagram of the construction process of the construction method in an embodiment of the present invention (I);

[0031] Figure 5 This is a schematic diagram (II) of the construction process of the construction method in this embodiment of the invention. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the technical solution of this invention.

[0033] <Example 1>

[0034] See Figures 1 to 3 This embodiment provides a shore-based water intake and drainage pipeline system, which includes: a leveling foundation 1, a protective embankment 2, a partition wall 3, fill material 4, underwater pile foundation 7, positioning pile head 8, platform beam 9, pier 16, pipeline 12, water intake and drainage head 18, limiting component 17, and sealing and water-stopping device 6.

[0035] The onshore water intake and drainage pipeline system in this embodiment is a water intake structure located near the coast. In this embodiment, the foundation in the seawater is rock, such as... Figure 1 As shown, Figure 1 In the diagram, 14 represents a land rock surface and 15 represents an underwater rock surface. However, this is not a limitation. The onshore water intake and drainage pipeline system of the present invention can also be implemented in waters near rivers and lakes, and the foundation is not limited to a rock foundation, but can also be a soil foundation, a sand foundation, etc.

[0036] The base leveling foundation 1 is constructed on an underwater rock surface. The main body of the base leveling foundation 1 is a weir constructed using building materials, and the weir is surrounded by a cofferdam using steel sheet piles.

[0037] The protective dike 2 is constructed on a leveled foundation 1. The protective dike 2 consists of several box-type structures arranged side-by-side, such as... Figure 2 As shown, in this embodiment, the box structure uses a prefabricated caisson. A partition wall 3 is constructed inside the caisson 2a, dividing the internal space of the box structure into several areas. These areas include at least one pipe installation area, which forms a through-passage from the land side to the water side by creating doorways in the partition wall 3 and the walls of the caisson 2a. This embodiment... Figure 2 The middle indicates that Figure 2 The central area of ​​the caisson 2a shown is configured as a through passage. Filler 4 is installed in the non-pipeline installation area inside the caisson structure. Additionally, a cover structure 19 can be installed on top of the cofferdam 2.

[0038] Several underwater pile foundations (7) are arranged in several rows along the water's edge and inserted into the underwater rock. The underwater pile foundations (7) employ a steel pipe pile configuration with internal concrete piles, ensuring the pile foundation's construction and subsequent durability. In this embodiment, as shown... Figure 2 The several underwater pile foundations shown are arranged in two rows, but this is not a limitation. In other embodiments, they can be arranged in multiple rows as needed.

[0039] The platform beam 9 is erected on the two-row drainage pile foundation 7 via positioning pile heads 8, and one side of the platform beam 9 is connected to the through passage. The platform beam 9 is composed of several precast beams or precast slabs, which are connected by concrete pouring. Figure 3 The diagram illustrates the precast beam 9b and precast slab 9a of the platform beam slab 9. Several piers 16 are cast in two rows on the platform beam slab 9, forming a guideway area between the two rows of piers 16.

[0040] like Figure 1 As shown, pipe 12 is installed along the through channel to the guide channel area. One end of pipe 12 is located on the land side, and the other end is located on the water side (sea side in this embodiment). Several intake / discharge heads 18 are connected to the underwater section of pipe 12 for drawing or draining water from the water body. Each intake / discharge head 18 is a head pipe equipped with an inlet valve or a outlet valve. The end of pipe 12 on the water side is a sealed end, and the end of pipe 12 on the land side is an open end. Pipe 12 consists of several pipe sections, with the last pipe section on the water side being a sealed section at one end (e.g., ...). Figure 1 As shown in 12a), adjacent pipe sections are connected by flanges and bolts. The last pipe section located on the landside is used to connect to the water supply or drainage pipeline of the adjacent water intake project.

[0041] Pipe 12 can be a round pipe or a square pipe, such as Figure 3 This embodiment uses a square tube structure.

[0042] like Figure 3 As shown, the pipe section 12, which is mounted on the platform beam 9, is fixed in place by a limiting assembly. The limiting assembly 17 includes a pressing structure that presses against the surface of the pipe and bolt fasteners that fix the two sides of the pressing structure to the platform beam. The pressing structure can be a plate-shaped pressing structure such as a metal plate or a precast concrete slab, or a rope-shaped pressing structure such as a metal rope lock or a nylon rope.

[0043] like Figure 1 and Figure 2 As shown, the pipe 12 is equipped with a sealing and water-stopping device 6 at each doorway, so that the entire system forms multiple seals. The sealing and water-stopping device 6 is a sealing ring or a sealing sleeve.

[0044] <Example 2>

[0045] This embodiment provides a construction method for the above-mentioned onshore water intake and drainage pipeline system, including the following steps:

[0046] Step 1: Construct a flat base on the underwater rock surface to create a smooth upper surface.

[0047] Step 2: Construct a protective dike and cofferdam on a leveled foundation. The protective dike and cofferdam consists of several box-type structures arranged side by side. The box-type structures are constructed by casting in the water using caissons or steel sheet piles and steel pipe piles.

[0048] The interior of the box-type structure is divided by partition walls, with corresponding door openings reserved in the partition walls and the box-type structure for the through passageways. These door openings are then temporarily sealed. For example... Figure 4 The temporary sealing 5 shown can be made using sealing plates, sealing plastic sleeves, etc., depending on the actual situation.

[0049] Step 3: Fill the non-pipeline installation area inside the box structure with filler.

[0050] Step 4: Install a sealing and waterproofing device at the doorway.

[0051] Step 5: Construct underwater pile foundations, reserving installation positions for positioning pile heads at the top of the underwater pile foundations.

[0052] Step 6: Precast the precast slabs and beams that form the platform beams, and perform a friction-reducing process on the surface of the precast slabs. Then, cast the concrete on-site to complete the erection and installation of the platform beams.

[0053] Step 7: Install the supporting equipment for pipe jacking on the land side.

[0054] Step 8: Install the landside pipeline: See Figure 3 The pipeline passes through the doorways one by one. When it passes through a doorway facing the water, the temporary underwater blockage is broken from the outside.

[0055] Step 9: Install the water-side pipes, see [link / reference] Figure 4 The pipe continued to be pushed forward in the water.

[0056] In step 9, when the pipe's buoyancy resistance is insufficient, a counterweight can be added inside the pipe. Figure 5 Figure 13 shows a counterweight.

[0057] In step 9, if water seepage occurs at the joints of the pipe sections during the installation of the water-side pipes, the seepage can first be controlled within the partitioned area by using a partition wall. Then, the construction personnel need to take measures such as backfilling and reinforcement in a timely manner.

[0058] Step 10: After jacking is completed, install the intake and drainage heads on the water-side pipe section and limit the pipe using the limiting components.

[0059] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A near shore sewer system, characterized in that, The system comprises: a foundation leveling base, a dike cofferdam, a partition wall, a filler, underwater pile foundations, positioning pile heads, platform beam plates, piers, pipelines, water intake and discharge heads; The foundation leveling base is built on an underwater foundation. The dike cofferdam is built on the foundation leveling base and comprises a plurality of box structures arranged side by side. The partition wall is arranged in the box structure to divide the interior space of the box structure into a plurality of areas, at least one pipeline installation area is included in the plurality of areas, and the pipeline installation area is formed by opening a door hole in the partition wall and the wall of the box structure to form a through channel from the land side to the water side. The filler is filled in the non-pipeline installation area inside the box structure. A plurality of underwater pile foundations are arranged in a plurality of rows on the water side and inserted into the underwater foundation, the platform beam plate is erected on the underwater pile foundations through the positioning pile heads, and one side of the platform beam plate is connected with the through channel. A plurality of piers are arranged in two rows on the platform beam plate, so that the platform beam plate forms a guide path area between the two rows of piers. The pipeline is arranged along the through channel to the guide path area, the end of the pipeline on the water side is a blocked end, the end of the pipeline on the land side is an open end, and a plurality of water intake and discharge heads are connected to the pipeline section under water. The pipeline section arranged on the platform beam plate is fixed by a limiting assembly. The pipeline is composed of a plurality of pipe sections, the last pipe section on the water side is a pipe section with one end blocked, and the adjacent pipe sections are connected by flanges and bolts. The pipeline is provided with a sealing water stop device corresponding to each door hole.

2. The temporary water intake and discharge pipeline system according to claim 1, wherein: wherein The limiting assembly comprises a pressure covering structure that is pressed on the surface of the pipeline and a bolt fixing member that fixes the two side edges of the pressure covering structure on the platform beam plate.

3. The method of installing a land drainage system according to claim 1 or 2, wherein, The method comprises the following steps: Step 1: building a foundation leveling base on an underwater foundation to construct a flat upper surface; Step 2: building a dike cofferdam on the foundation leveling base, the dike cofferdam comprising a plurality of box structures arranged side by side, building a partition wall inside the box structure to divide it, reserving door holes for through channels on the partition wall and the box structure, and temporarily blocking the door holes; Step 3: filling the filler in the non-pipeline installation area inside the box structure; Step 4: installing a sealing water stop device at the door hole position; Step 5: constructing underwater pile foundations in water, and reserving installation positions of positioning pile heads on the heads of the underwater pile foundations; Step 6: precasting precast plates and precast beams to constitute platform beam plates, and completing the erection and installation of the platform beam plates on site; Step 7: installing a rear matching device for pipeline jacking on the land side; Step 8: installing a land-side pipeline: the pipeline passes through the door holes step by step, and when passing through the water-side door hole, the temporary underwater unblocking is performed from the outside; Step 9: installing a water-side pipeline: the pipeline continues to be jacked in water; Step 10: after jacking is completed, installing water intake and discharge heads on the pipeline section on the water side, and limiting the pipeline.

4. The construction method according to claim 3, wherein: wherein, The box structure is completed by sinking a caisson or cast in situ in a water foundation pit by steel sheet piles and steel pipe piles.

5. The construction method of claim 3, wherein: wherein Step 6 of manufacturing the precast slab further comprises performing friction-reducing processing on the surface of the precast slab.

6. The construction method of claim 3, wherein: wherein, Step 9 of installing the water-side pipeline further comprises adding a counterweight inside the pipeline.

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