Underwater double-pipe parallel laying construction structure

Abstract

The utility model discloses an underwater double-pipe parallel laying construction structure. The underwater double-pipe parallel laying construction structure comprises a pipe groove, the pipe groove is a trapezoidal groove channel, the bottom face of the groove is composed of the top face of a first sand gravel layer, and two steel pipes are laid on the bottom face of the groove in parallel; a second sand gravel layer, a gabion layer, a sand bag layer and a third sand gravel layer are sequentially laid in the pipe groove from bottom to top. The middle part of the gabion layer is formed by laying a single layer of gabion gabion, and gaps between two sides of the gabion gabion and the slope surface are filled with sand bags; the two steel pipes are arranged in the second sand gravel layer at intervals; and the surface of the third sand gravel layer is an original riverbed surface. The device can be suitable for various river-crossing immersed tube construction conditions, the whole construction structure frame is fixed, design verification is carried out only for specific parameters of all layers during use, and the time period is greatly shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater submerged pipes, in particular to an underwater double-pipe parallel laying construction structure. Background Art

[0002] During the construction of water pipelines, it is often necessary to carry out immersed pipe construction across rivers. As underwater projects are easily affected by various factors such as water level and geology, the construction risk is high and the quality requirements are high. Therefore, the construction of immersed pipes across rivers is a key node and a difficult point in the entire project. At present, in the field of immersed pipe construction across rivers, there are many construction structures, most of which are specially designed according to specific circumstances and are different from each other. It takes a lot of design verification time, which affects the project cycle. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an underwater double-pipe parallel laying construction structure, the overall construction structure frame is fixed, and during construction, only the design verification is required for specific parameters of each layer, which greatly saves time and cycle.

[0004] The utility model provides an underwater double-pipe parallel laying construction structure, comprising a pipe trough, wherein the pipe trough is a trapezoidal trough, the bottom surface of the trough is composed of the top surface of a first gravel layer, and two steel pipes are laid in parallel on the bottom surface of the trough; a second gravel layer, a gabion stone cage layer, a sandbag layer and a third gravel layer are laid in sequence from bottom to top in the trough of the pipe trough; the middle part of the gabion stone cage layer is paved with a single layer of gabion stone cages, and the gaps between the two sides of the gabion stone cages and the slope surface are filled with sandbags; the two steel pipes are arranged in the second gravel layer at intervals; the top surface of the sandbag layer is flush with the lowest point of the original riverbed surface at the top of the trough, and the surface of the third gravel layer is the original riverbed surface.

[0005] In the above-mentioned underwater double-pipe parallel laying construction structure, the pipe trench is backfilled in layers, with reliable performance, and can be applied to various cross-river immersed pipe construction. The overall construction structure frame is fixed, and when in use, only the design verification of the specific layer parameters is required, which greatly saves time and cycle.

[0006] Furthermore, each of the steel pipes is spaced apart from the slope surface on the corresponding side at the same spacing distance, so that the steel pipes are symmetrically arranged in the channel, and the two sides and the top of each steel pipe are buried in the same condition and are evenly stressed.

[0007] Furthermore, the gabion cage is composed of a rectangular cage mesh filled with stones, and the stone particle size is 150-250mm.

[0008] Furthermore, the gabion stone cages are placed with their long sides in the same direction as the water flow direction of the river, and are placed in a staggered manner perpendicular to the water flow direction of the river. The long sides are placed in the same direction as the water flow direction of the river, so that the gabion stone cages are less affected by the water flow during construction, and the staggered placement increases the durability and scouring resistance of the gabion stone cages.

[0009] Furthermore, the diameters of the two steel pipes are both 1600 mm, and they are laid in parallel on the bottom surface of the pipe trench.

[0010] Furthermore, the bottom width of the pipe trench is 5200-7700 mm, the height from the bottom of the trench to the lowest point of the original riverbed surface at the top of the channel is 3600-4100 mm, and the slope of the side slopes is not greater than 1:3.5.

[0011] Furthermore, the thickness of the first gravel layer is 200-400 mm.

[0012] Furthermore, the thickness of the second gravel layer is 2100-2350 mm.

[0013] Furthermore, the thickness of the gabion cage layer is 1000-1150 mm.

[0014] Furthermore, the thickness of the sandbag layer is 500-600 mm.

[0015] In summary, by adopting the above-mentioned underwater double-pipe parallel laying construction structure, the overall construction structure framework is fixed, and during construction, only the design verification of the specific parameters of each layer is required, which greatly saves time and period. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the attached picture:

[0017] Figure 1 It is a cross-sectional view of the pipe trench of the underwater double-pipe parallel laying construction structure of the utility model.

[0018] In the figure, 1, pipe groove; 2, first gravel layer; 3, second gravel layer; 4, gabion cage layer; 5, sandbag layer; 6, third gravel layer; 7, steel pipe; 8, original riverbed surface. DETAILED DESCRIPTION

[0019] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation modes is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0020] Example 1

[0021] Figure 1 The utility model shows an underwater double-pipe parallel laying construction structure. Figure 1As shown, the underwater double-pipe parallel laying construction structure includes a pipe groove 1, which is a trapezoidal groove. The bottom surface of the groove is composed of the top surface of the first gravel layer 2, and two steel pipes 7 are laid in parallel on the bottom surface of the groove; the second gravel layer 3, the gabion cage layer 4, the sandbag layer 5 and the third gravel layer 6 are laid in sequence from bottom to top in the pipe groove 1; the middle part of the gabion cage layer 4 is paved with a single layer of gabion cages, and the gaps between the two sides of the gabion cages and the slope are filled with sandbags; the two steel pipes 7 are arranged at intervals in the second gravel layer 3; the top surface of the sandbag layer 5 is flush with the lowest point of the original riverbed surface 8 at the top of the groove, and the surface of the third gravel layer 6 is the original riverbed surface 8.

[0022] Optionally, each steel pipe 7 is spaced apart from the slope surface on the corresponding side at the same spacing distance, so that the steel pipes are symmetrically arranged in the channel, and the two sides and the top of each steel pipe are buried in the same condition and are evenly stressed.

[0023] Optionally, the gabion cage is composed of a rectangular cage mesh filled with stones, and the stone particle size is 150-250mm.

[0024] Optionally, the gabion cages are placed with their long sides aligned with the direction of the river flow, and staggered vertically along the direction of the river flow. The long sides are aligned with the direction of the river flow, so that the construction is less affected by the river flow, and staggered placement increases the durability and scouring resistance of the gabion cages.

[0025] Optionally, the diameters of the two steel pipes 7 are both 1600 mm, and they are laid in parallel on the bottom surface of the pipe trench 1 .

[0026] Optionally, the bottom width of the pipe trench 1 is 5200-7700 mm, the height from the bottom surface of the trench to the lowest point of the original riverbed surface 8 at the top of the channel is 3600-4100 mm, and the slope of the side slopes is not greater than 1:3.5.

[0027] Optionally, the thickness of the first gravel layer 2 is 200-400 mm, preferably 300 mm, and the backfill is made of natural graded gravel with a gravel particle size of not less than 20 mm and not more than 40 mm.

[0028] Optionally, the second gravel layer 3 has a thickness of 2100-2350 mm, preferably 2100 mm, and the dumping adopts natural graded gravel, and the gravel diameter is not more than 50 mm.

[0029] Optionally, the thickness of the gabion cage layer 4 is 1000-1150 mm.

[0030] Optionally, the sandbag layer 5 has a thickness of 500-600 mm.

[0031] When in use, firstly, design verification is carried out for specific parameters of each layer such as thickness and width, and then construction is carried out. The specific process of construction is: first, a trapezoidal foundation pit of the pipe trench 1 is dug; then, gravel is dumped and leveled to form a first gravel layer 2 as a cushion layer; then, two steel pipes 7 are put in, and then gravel is dumped to form a second gravel layer 3; then, gabion cages and sand belts are dumped to form a gabion cage layer 4 and a sand belt layer 5; finally, gravel is dumped to the original riverbed surface 8 to complete the construction. In addition, the sand and gravel ratio of the first gravel layer 2, the second gravel layer 3 and the third gravel layer 6 is set according to actual needs.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit its protection scope. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the utility model, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the utility model, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the utility model.

Claims

1. An underwater double-pipe parallel laying construction structure, characterized in that: The invention comprises a pipe trough (1), wherein the pipe trough (1) is a trapezoidal channel, the bottom surface of the trough being formed by the top surface of a first gravel layer (2), and two steel pipes (7) are laid in parallel on the bottom surface of the trough; a second gravel layer (3), a gabion cage layer (4), a sandbag layer (5) and a third gravel layer (6) are laid in sequence from bottom to top in the trough of the pipe trough (1); the middle part of the gabion cage layer (4) is paved with a single layer of gabion cages, and the gaps between the two sides of the gabion cages and the slope surface are filled with sandbags; the two steel pipes (7) are arranged in the second gravel layer (3) at intervals; the top surface of the sandbag layer (5) is flush with the lowest point of the original riverbed surface (8) at the top of the channel, and the surface of the third gravel layer (6) is the original riverbed surface (8).

2. The underwater double-pipe parallel laying construction structure according to claim 1, characterized in that: Each of the steel pipes (7) is spaced apart from the slope surface on the corresponding side, and the spacing distance is the same.

3. The underwater double-pipe parallel laying construction structure according to claim 1, characterized in that: The gabion stone cage is composed of a rectangular cage mesh filled with stones, and the stone particle size is 150-250mm.

4. The underwater double-pipe parallel laying construction structure according to claim 3 is characterized in that: The gabion stone cages are placed with their long sides aligned with the direction of the water flow in the river channel, and are staggered vertically along the direction of the water flow in the river channel.

5. The underwater double-pipe parallel laying construction structure according to claim 1, characterized in that: The diameters of the two steel pipes (7) are both 1600 mm, and they are laid in parallel on the bottom surface of the pipe groove (1).

6. The underwater double-pipe parallel laying construction structure according to claim 5, characterized in that: The bottom width of the pipe trough (1) is 5200-7700 mm, the height from the bottom surface of the trough to the lowest point of the original riverbed surface (8) at the top of the channel is 3600-4100 mm, and the slope of the side slopes is not greater than 1:3.

5.

7. The underwater double-pipe parallel laying construction structure according to claim 5, characterized in that: The first gravel layer (2) has a thickness of 200-400 mm.

8. The underwater double-pipe parallel laying construction structure according to claim 5, characterized in that: The second gravel layer (3) has a thickness of 2100-2350 mm.

9. The underwater double-pipe parallel laying construction structure according to claim 5, characterized in that: The thickness of the gabion cage layer (4) is 1000-1150 mm.

10. The underwater double-pipe parallel laying construction structure according to claim 5, characterized in that: The thickness of the sandbag layer (5) is 500-600 mm.

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