Steel cable reinforcing structure for water supply pipe of water plant in underwater large-depth complex terrain

Abstract

The utility model relates to a steel cable reinforcing structure for a water supply pipe of a water plant in an underwater large-depth complex terrain, which solves the problem that the safe use of the water supply pipe is difficult to guarantee in the construction of the underwater water supply pipe in the large-depth complex terrain. Hoops are arranged on the outer wall of a water supply pipeline at intervals of clamping, anchor blocks are poured on the bank at the corresponding positions of the two water outlet ends of the water supply pipeline, the upper surfaces of the anchor blocks are obliquely arranged, the water outlet ends of the water supply pipeline are fixed through the anchor blocks, each hoop is formed by splicing two half hoops, the two half hoops are symmetrical in structure, and the two ends of each half hoop extend outwards to form splicing arms respectively. The splicing arms at the two ends of the two half hoops are aligned and locked through locking bolts, the splicing arms of the two half hoops are oppositely provided with steel cable clamping grooves, and steel cables are clamped in the steel cable clamping grooves. The steel cables are arranged along the two sides of the underwater section of the water supply pipeline in a full-length mode, the steel cables are symmetrically arranged on the two sides of the water supply pipeline, steel cable fixing seats are symmetrically arranged on the two sides of the lower portion of the upper surface of the anchor block, and the ends of the steel cables are fixed to the steel cable fixing seats. The full-length steel cables are arranged on the two sides of the underwater section of the water supply pipeline so as to bear gravity, impact force and pulling force which are originally borne by the pipeline, the stress of the pipeline can be greatly reduced, and the service life of the water supply pipeline is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering construction, and relates to a submerged pipe installation structure for underwater water supply pipes, in particular to a steel cable reinforcement structure for water supply pipes of a water plant with large underwater depth and complex terrain. Background Art

[0002] At present, the construction methods used for water supply pipelines crossing rivers, lakes and other water bodies are usually the following: pipe erection with the bridge, pipe erection with a separate pipe bridge, traction construction, pipe jacking construction and immersed pipe construction.

[0003] Pipe installation along the bridge requires considering the load of the pipeline when designing the bridge. This method is relatively inexpensive and convenient for maintenance and inspection in the later stage. It is most widely used in municipal projects. If the waters where the pipeline needs to cross happen to have plans to lay a road or bridge, pipe installation along the bridge is a relatively better solution.

[0004] A separate pipe bridge needs to be built to carry pipes. Although it is convenient for maintenance and inspection in the later stage, the cost is very high. It is generally suitable for large-diameter pipelines crossing narrow rivers and when high pipeline safety requirements are required.

[0005] Pulling, jacking, and immersed tube construction methods bury pipelines beneath the riverbed, making subsequent maintenance and inspection inconvenient, requiring high construction quality, and compromising safety. Pulling and jacking have specific requirements for the width of the water area and geology, and long distances cannot be completed in one go. Immersed tube construction has few restrictions on water width and underwater geology, but traditional immersed tube construction is significantly affected by the depth of the water area, with the cost increasing exponentially with deeper depth.

[0006] The traditional immersed tube construction process involves the following steps: construction preparation → surveying and positioning → dredging vessel placement → underwater pipeline trench excavation → pipeline foundation soft foundation treatment → pipeline cushion foundation laying → floating the connected pipeline to the top of the trench by boat → pipeline sinking and installation → construction of pipeline ancillary structures → pipeline pressure testing → trench backfilling and weighting → embankment repair → project acceptance.

[0007] Traditional immersed tube construction requires the use of dredgers to dig trenches for the pipelines. Deep waters require long-reach excavators and large vessels to facilitate construction. After the pipelines are lowered and installed, backfilling and weighting are required to prevent them from shifting. Traditional immersed tube construction techniques require demanding conditions and a long construction period, with a significant portion of the work performed underwater. This makes the construction more difficult and expensive.

[0008] For the layout of cross-lake water supply pipelines in waters with long spans, great depths and complex underwater terrain, such as Qiandao Lake, there are basically no bridges suitable for laying pipes on such lakes; the span of a separate pipe bridge is large, the cost is high, and it will affect the navigation of ships; because the lake depth is more than 30 meters, the towing method and the jacking method are not applicable; and traditional immersed pipe construction is difficult to implement because it exceeds the maximum depth of dredger trenching construction.

[0009] The applicant's previous Chinese patent application, with publication number CN113175017A and publication date July 27, 2021, discloses a deep-sea water supply pipe sinking construction process. This solution addresses the deep water along the water supply pipe, where the dredger's excavation depth is insufficient. The solution employs a construction method in which counterweights are laid on both sides of the water supply pipe to ensure the stability of the underwater water supply pipe and resist lateral impacts. This reduces underwater operations and reduces construction difficulty and cost. However, due to the great depth of the lake, the connecting section of the water supply pipe extending from the shore to the bottom is long and heavy. The pipe is subject to significant stress due to its own weight and is easily broken. Furthermore, the underwater terrain is complex, and no matter which pipe route is chosen, there will inevitably be cliffs or gullies along the pipe, which will cause part of the pipe to be unable to contact the bottom and remain suspended. This makes it susceptible to pressure from the turning of the water flow in the pipe and to lateral impacts from underwater undercurrents. Moreover, in such deep and complex terrain, once the water supply pipe breaks, it is almost impossible to repair it. Therefore, how to ensure the safe use of the water supply pipe is the focus of water supply pipe installation in such terrain. Utility Model Content

[0010] The purpose of the utility model is to solve the problem that underwater water supply pipes at great depths and complex terrains are affected by the weight of the water supply pipes and the complex underwater terrain, the water supply pipes are subjected to great forces and the force conditions are complex, and the existing construction methods are difficult to ensure the safe use of the water supply pipes. The utility model provides a steel cable reinforcement structure for water supply pipes in water plants at great depths and complex underwater terrains, which distributes the force of the water supply pipes themselves to the steel cables on both sides to achieve reinforcement and extend the service life of the water supply pipes.

[0011] The technical solution adopted by the utility model to solve its technical problems is: a steel cable reinforcement structure for a water supply pipe of a water plant with a large underwater depth and complex terrain, comprising a water supply pipe, an outer wall of the water supply pipe is provided with a clamp at every interval, anchor piers are cast on the shore at corresponding positions of the two water outlet ends of the water supply pipe, the upper surface of the anchor pier is inclined, and the water outlet end of the water supply pipe is fixed by the anchor pier, the clamp is formed by splicing two half hoops, the two half hoops are symmetrical in structure, and the two ends of the half hoops are respectively extended outward with splicing arms, the splicing arms at the two ends of the two half hoops are respectively aligned and locked by locking bolts, the splicing arms of the two half hoops are relatively provided with steel cable clamp grooves, and a steel cable is clamped in the steel cable clamp groove; the steel cable is arranged along the full length of both sides of the underwater section of the water supply pipe, and the steel cable is symmetrically arranged on both sides of the water supply pipe, and steel cable fixing seats are symmetrically provided on both sides of the lower part of the upper surface of the anchor pier, and the ends of the steel cable are fixed on the steel cable fixing seats.

[0012] The traditional water supply pipe structure has never had a structure in which reinforced steel cables are laid on both sides of the water supply pipe. This structure is applicable to waters with great depth and complex underwater terrain to solve the following three problems: 1. The sinking of the water supply pipe requires the use of the pipe's own weight. If the pipe's own weight is insufficient, a counterweight needs to be set on the outside of the water supply pipe to help the pipe sink smoothly and ensure that the pipe will not float up when it is empty. When the water depth is large, the gravity of the water supply pipe and the gravity of the counterweight in the distance difference from the river bank to the bottom of the water will generate a huge tensile load on the water supply pipe. If the water supply pipe cannot withstand the gravity load, it will be broken; 2. After the construction of the water supply pipe, since the water supply pipe is not directly and completely in contact with the bottom of the water, it will continue to sink during long-term use. However, the anchor pier can only fix the water outlet of the water supply pipe after waiting for a limited time. The long-term continuous sinking of the pipe will generate more and more tension on the water supply pipe. Therefore, the steel cables on both sides of the water supply pipe can be To share this kind of continuous pulling force and prevent the water supply pipe from being damaged; 3. When the terrain of the water area is complex, especially in artificial reservoirs such as Qiandao Lake, there are gullies and cliffs in the terrain of the water area. The layout route of the water supply pipe can hardly avoid these terrains. When the water supply pipe passes through these terrains, part of the pipe will not be able to touch the bottom, but will be in a suspended state. This section of the water supply pipe is suspended, not only under the influence of gravity to form a curvature, but also in the curved section due to the pressure generated by the internal water flow, and will be impacted by irregular underwater undercurrents. The situation is very complicated and can easily lead to pipe cracking. This structure lays full-length steel cables on both sides of the underwater section of the water supply pipe to withstand the gravity, impact force and tension originally borne by the pipe itself, which can greatly reduce the stress on the pipe and extend the service life of the water supply pipe.

[0013] Preferably, the clamp includes a stainless steel clamp and a concrete clamp. The stainless steel clamp is used to fix the steel cable, and the concrete clamp mainly acts as a counterweight to assist the water supply pipe in sinking and prevent it from floating.

[0014] Preferably, the stainless steel clamp splicing arm is provided with locking bolts on the inner and outer sides of the cable clamping groove respectively.

[0015] Preferably, the concrete hoop is provided with a locking bolt on the outside of the steel cable clamping groove.

[0016] Preferably, a rubber gasket is provided between the inner wall of the steel cable clamping groove and the steel cable.

[0017] Preferably, a rubber gasket is provided between the inner wall of the clamp and the outer wall of the water supply pipe.

[0018] Preferably, the steel cable fixing seat is a T-shaped support with the horizontal side on top and the straight side facing downward for fixing the steel cable. The steel cable fixing seat is made of steel plate, and the steel cable fixing seat is anchored on the anchor pier with steel bars.

[0019] Preferably, a turnbuckle with adjustable tightness is provided between the end of the steel cable and the steel cable fixing seat.

[0020] Preferably, the water supply pipeline adopts a wire mesh skeleton PE pipe, and the joints of adjacent water supply pipelines are hot-melt welded.

[0021] Preferably, at least one stainless steel expansion joint is provided in the water supply pipe above the anchor pier.

[0022] The utility model arranges full-length steel cables on both sides of the underwater section of the water supply pipeline to bear the gravity, impact force and tension originally borne by the pipeline itself, which can greatly reduce the stress on the pipeline and extend the service life of the water supply pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 The utility model is a schematic diagram of the structure of the water outlet end of a water supply pipe.

[0025] Figure 2 It is a side view of a pier structure of the utility model.

[0026] Figure 3 It is a plan view of a pier structure of the utility model.

[0027] Figure 4 It is a schematic diagram of a stainless steel clamp on a water supply pipe of the utility model.

[0028] Figure 5 It is a cross-sectional view of the position of a stainless steel clamp of the present invention.

[0029] Figure 6 The utility model is a schematic diagram of a concrete clamp on a water supply pipe.

[0030] Figure 7 It is a cross-sectional view of the position of a concrete hoop of the utility model.

[0031] In the figure: 1. Anchor pier, 2. Water supply pipe, 3. Pipe guide groove, 4. Stainless steel expansion joint, 5. Steel cable fixing seat, 6. Basket bolt, 7. Steel cable, 8. Water supply pipe joint, 9. Stainless steel clamp, 10. Rubber gasket, 11. Steel cable clamp groove, 12. Locking bolt, 13. Concrete clamp, 14. Embedded clamp, 15. Hot melt welding device. DETAILED DESCRIPTION

[0032] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0033] Example: A steel cable reinforcement structure for water supply pipes in a water plant with large depth and complex terrain, such as Figure 1-7 This example has been implemented and continues to operate normally in the Qiandao Lake water supply project. This structure is suitable for laying water supply pipelines in deep waters with complex bottom terrain, such as Qiandao Lake.

[0034] This structure includes a water supply pipe 2 arranged across the Qiandao Lake waters. The outer wall of the water supply pipe 2 is provided with a clamp at intervals. Anchor piers 1 are cast on the shore at the corresponding positions of the two water outlet ends of the water supply pipe 2. The upper surface of the anchor pier is inclined. The water outlet end of the water supply pipe is fixed by the anchor pier 1. Figure 1 、 2 As shown in Figures 3 and 4, a semicircular pipe guide groove 3 is centrally located on the top surface of the anchor pier. The water supply pipe 2 is installed along the guide groove 3. Pre-embedded clamps 14 are evenly distributed on the bottom surface of the guide groove 3. These clamps are half-hoops. After the water supply pipe 2 is installed and allowed to settle naturally for 1-3 months, another half-hoop is used to secure the pipe 2. At least one stainless steel expansion joint 4 is installed in the water supply pipe above the anchor pier 1 to accommodate minor sinking of the pipe.

[0035] The clamp on the outer wall of the water supply pipe 2 is formed by joining two symmetrical halves. Each half has a splicing arm extending outward from each end. These arms are aligned and locked together by a locking bolt 12. The splicing arms on each half are positioned opposite each other, with cable clamping grooves 11 positioned within them. A rubber gasket 10 is positioned between the inner wall of the clamp and the outer wall of the water supply pipe 2. The cables 7 run symmetrically along the length of the underwater section of the water supply pipe 2. Cable fixing brackets 5 are symmetrically positioned on the lower portion of the upper surface of the anchor block 1. The ends of the cables 7 are secured to these brackets. These brackets are T-shaped, with the horizontal side facing upward and the straight side facing downward, for securing the cables 7. They are made of steel plate and anchored to the anchor block 1 with rebar. A turnbuckle 6 with adjustable tightness is provided between the end of the steel cable 7 and the steel cable fixing seat 5 .

[0036] The clamps on the outer wall of the water supply pipe 2 include a stainless steel clamp 9 and a concrete clamp 13. Figure 4 、 5 As shown, the stainless steel hoop 9 is provided with locking bolts 12 on the inner and outer sides of the cable clamping groove 11. Figure 6 、 7 As shown, the concrete hoop 13 is provided with a locking bolt 12 on the outside of the cable clamping groove 11 .

[0037] The water supply pipe 2 adopts a wire mesh skeleton PE pipe, such as Figure 4 As shown, adjacent water supply pipe joints 8 are heat-melted by a heat-melting welding device 15. The closest distance between the clamp and the water supply pipe joint 8 is not less than 1 meter.

[0038] The stainless steel clamps 9 are arranged on the water supply pipe 2 at intervals of 2-4 meters, and the concrete clamps 13 are arranged on the water supply pipe 2 at intervals of 4-6 meters.

Claims

1. A steel cable reinforcement structure for a water supply pipe in a waterworks located underwater at great depths and in complex terrain, comprising a water supply pipe, wherein the outer wall of the water supply pipe is provided with a clamp at intervals, and anchor blocks are cast on the shore at positions corresponding to the two outlet ends of the water supply pipe, wherein the upper surfaces of the anchor blocks are inclined, and the outlet ends of the water supply pipe are fixed by the anchor blocks, characterized in that: The clamp is formed by splicing two half hoops, and the two half hoops have symmetrical structures. Splicing arms are respectively extended outward at both ends of the half hoops. The splicing arms at both ends of the two half hoops are respectively aligned and locked by locking bolts. The splicing arms of the two half hoops are relatively provided with steel cable clamping grooves, and steel cables are clamped in the steel cable clamping grooves; the steel cables are arranged along the full length of both sides of the underwater section of the water supply pipeline, and the steel cables are symmetrically arranged on both sides of the water supply pipeline, and steel cable fixing seats are symmetrically provided on both sides of the lower part of the upper surface of the anchor pier, and the ends of the steel cables are fixed on the steel cable fixing seats.

2. The steel cable reinforcement structure for water supply pipes in a water plant with deep and complex underwater terrain according to claim 1 is characterized by: The clamps include stainless steel clamps and concrete clamps.

3. The steel cable reinforcement structure for water supply pipes in a water plant with deep and complex underwater terrain according to claim 2 is characterized by: The stainless steel clamping arm is provided with locking bolts on the inner side and the outer side of the cable clamping groove respectively.

4. The steel cable reinforcement structure for water supply pipes in a water plant with deep and complex underwater terrain according to claim 2 is characterized by: The concrete hoop is provided with a locking bolt on the outer side of the steel cable clamping groove.

5. The steel cable reinforcement structure for water supply pipes in a water plant with deep and complex underwater terrain according to claim 1 is characterized by: A rubber gasket is provided between the inner wall of the steel cable clamping groove and the steel cable.

6. The steel cable reinforcement structure for water supply pipes in a water plant with deep and complex underwater terrain according to claim 1 is characterized by: A rubber gasket is provided between the inner wall of the clamp and the outer wall of the water supply pipe.

7. The steel cable reinforcement structure for water supply pipes in a water plant with deep and complex underwater terrain according to claim 1 is characterized by: The steel cable fixing seat is a T-shaped support with the horizontal side on top and the straight side facing downward for fixing the steel cable. The steel cable fixing seat is made of steel plate and is anchored on the anchor pier with steel bars.

8. The steel cable reinforcement structure for water supply pipes in a water plant with deep and complex underwater terrain according to claim 1 is characterized by: A turnbuckle with adjustable tightness is provided between the end of the steel cable and the steel cable fixing seat.

9. The steel cable reinforcement structure for water supply pipes in a water plant with deep and complex underwater terrain according to claim 1 is characterized by: The water supply pipeline adopts a wire mesh skeleton PE pipe, and the joints of adjacent water supply pipelines are welded by hot melt welding.

10. The steel cable reinforcement structure for water supply pipes in a water plant with deep and complex underwater terrain according to claim 1, characterized in that: At least one stainless steel expansion joint is provided in the water supply pipe above the pier.

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