Steel pipe pile cofferdam enclosure type in high-water-level operation reservoir

Abstract

The utility model discloses a steel pipe pile cofferdam enclosure type in a high-water-level operating reservoir, which comprises a first-stage enclosure and a second-stage enclosure, the first-stage enclosure comprises a first lock catch pile cofferdam which is vertically lapped with a shoreside, and a second lock catch pile cofferdam is arranged at one end, far away from the shoreside, of the first-stage enclosure and is parallel to the shoreside; one end of the second buckling pile cofferdam is connected with the first buckling pile cofferdam, and the other end of the second buckling pile cofferdam is vertically provided with a third buckling pile cofferdam in the direction close to the shore; the second-stage enclosure comprises a fourth lock catch pile cofferdam arranged in the extending direction of the first lock catch pile cofferdam. The other end of the fourth lock catch pile cofferdam is connected with a fifth lock catch pile cofferdam, the fifth lock catch pile cofferdam is parallel to the shoreside, and the fifth lock catch pile cofferdam and the second lock catch pile cofferdam are arranged on the same side of the first lock catch pile cofferdam. According to the steel pipe pile cofferdam enclosure type in the high-water-level operating reservoir, the problems of water retaining in construction and deep foundation pit enclosure in the reservoir are solved, materials are saved, the occupied area of the cofferdam and the work amount are reduced, and construction is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy and hydropower engineering design, and specifically relates to a steel pipe pile cofferdam protection type in a reservoir operating at a high water level. Background Art

[0002] Under the high water level operation conditions of reservoirs with complex geology and topography, if underwater excavation, blasting and concrete pouring and other construction technologies are used for the water intake in the reservoir, there will be problems such as high construction technology requirements, high construction safety risks, high construction costs and impact on reservoir water quality; if ordinary steel sheet pile cofferdams are used for enclosure, there will be problems such as deep pile driving, large foundation pit dewatering depth, and high water side pressure inside and outside the cofferdam, resulting in the steel sheet pile bending modulus far from meeting the design requirements; if steel box cofferdams are used, there will be a problem of high steel consumption, and the site does not have the conditions for large-scale transportation, lifting equipment to enter and assemble. Utility Model Content

[0003] The utility model aims to provide a steel pipe pile cofferdam protection type in a high water level operating reservoir, which solves the problems of water retaining and deep foundation pit protection in reservoir construction, saves materials, reduces the area occupied by the cofferdam and the amount of engineering, and is convenient for construction.

[0004] The technical scheme adopted by the utility model is a steel pipe pile cofferdam enclosure type in a reservoir operating at a high water level, including a first-stage enclosure and a second-stage enclosure, the first-stage enclosure including a first locking pile cofferdam vertically overlapped with the shore, a second locking pile cofferdam is arranged parallel to the shore at one end of the first locking pile cofferdam away from the shore, one end of the second locking pile cofferdam is connected to the first locking pile cofferdam, and the other end is vertically arranged with a third locking pile cofferdam along the direction close to the shore; the second-stage enclosure includes a fourth locking pile cofferdam arranged along the extension direction of the first locking pile cofferdam, the fourth locking pile cofferdam is connected to the end of the first locking pile cofferdam away from the shore; the other end of the fourth locking pile cofferdam is connected to a fifth locking pile cofferdam, the fifth locking pile cofferdam is arranged parallel to the shore, and the fifth locking pile cofferdam and the second locking pile cofferdam are arranged on the same side of the first locking pile cofferdam.

[0005] The utility model is also characterized in that:

[0006] The first phase of the enclosure also includes a first purlin arranged between the second locking pile cofferdam and the shore. The first purlin is arranged in close contact with the first locking pile cofferdam, the second locking pile cofferdam, and the third locking pile cofferdam. A concrete layer is poured between the first purlin and the first locking pile cofferdam, the second locking pile cofferdam, and the third locking pile cofferdam.

[0007] The second phase enclosure also includes a second purlin arranged between the second locking pile cofferdam and the fifth locking pile cofferdam, the second purlin is arranged in close proximity to the fourth locking pile cofferdam and the fifth locking pile cofferdam, and a concrete layer is poured between the second purlin and the fourth locking pile cofferdam and the fifth locking pile cofferdam.

[0008] A plurality of mutually parallel inner support rods are arranged on the first enclosure purlin which is in contact with the first locking pile cofferdam and the second locking pile cofferdam, and both ends of each inner support rod are respectively welded to the first enclosure purlin through a connecting plate;

[0009] A plurality of mutually parallel inner support rods are arranged on the first enclosure purlin which is in contact with the second locking pile cofferdam and the third locking pile cofferdam, and both ends of each inner support rod are respectively welded to the first enclosure purlin through a connecting plate;

[0010] A plurality of mutually parallel inner support rods are arranged on the second enclosure purlin which is in contact with the fourth locking pile cofferdam and the fifth locking pile cofferdam, and both ends of each inner support rod are respectively welded to the second enclosure purlin through a connecting plate;

[0011] Each of the inner support rods is connected with a column, and the other end of the column is vertically inserted into the foundation pit; a connection system is arranged between adjacent inner support rods.

[0012] The connection system comprises at least two first channel steels, each of which is vertically connected between adjacent inner support rods; a second channel steel is connected between the two first channel steels, and both ends of the second channel steel are respectively connected to two adjacent inner support rods.

[0013] The fifth locking pile cofferdam adopts Spiral tube, Seamless steel pipe and 28a I-steel are welded and connected by CT type; the first lock pile cofferdam, the second lock pile cofferdam, the third lock pile cofferdam and the fourth lock pile cofferdam are all made of Spiral tube, The seamless steel pipe is welded with 28a I-beam and connected with CT type.

[0014] The beneficial effects of the utility model are:

[0015] The utility model discloses a steel pipe pile cofferdam protection type in a reservoir with high water level operation. Under the condition that the reservoir is not emptied, the cofferdam structure and the foundation pit protection structure are combined to form a dry foundation pit. At the same time, the problems of water retaining and deep foundation pit protection in the reservoir are solved, materials are saved, the land occupation and engineering workload of the cofferdam are reduced, the construction is convenient, and it has better engineering adaptability than other types of cofferdam plus foundation pit support. The water intake layout plan in the reservoir is implemented safely and effectively, and the smooth implementation of the entire water diversion project is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a steel pipe pile cofferdam protection structure in a high water level operating reservoir.

[0017] In the figure: 1. first locking pile cofferdam; 2. second locking pile cofferdam; 3. third locking pile cofferdam; 4. fourth locking pile cofferdam; 5. fifth locking pile cofferdam; 6. first purlin; 7. second purlin; 8. inner support rod; 9. connecting plate; 10. column; 11. first channel steel; 12. second channel steel; 13. concrete layer. DETAILED DESCRIPTION

[0018] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0019] The utility model is a steel pipe pile cofferdam protection type in a high water level operating reservoir, such as Figure 1 As shown, the overall layout is "F" type, which realizes the isolation of the construction area from the reservoir water area. Specifically, it includes the first-phase enclosure and the second-phase enclosure, wherein the first-phase enclosure is set in the general section, and the second-phase enclosure is set in the deep water section; the first-phase enclosure includes a first locking pile cofferdam 1 vertically overlapped with the shore, and a second locking pile cofferdam 2 is set parallel to the shore at the end of the first locking pile cofferdam 1 away from the shore, and one end of the second locking pile cofferdam 2 is connected to the first locking pile cofferdam 1, and the other end is vertically set with a third locking pile cofferdam 3 close to the shore; the second-phase enclosure is "L" shaped, including a fourth locking pile cofferdam 4 set along the extension direction of the first locking pile cofferdam 1, and the fourth locking pile cofferdam 4 is connected to the end of the first locking pile cofferdam 1 away from the shore; the other end of the fourth locking pile cofferdam 4 is connected to the fifth locking pile cofferdam 5, and the fifth locking pile cofferdam 5 is set parallel to the shore, and the fifth locking pile cofferdam 5 and the second locking pile cofferdam 2 are set on the same side of the first locking pile cofferdam 1. Among them, because the first-phase and second-phase enclosures are set up in different foundation pit areas, the fifth lock pile cofferdam 5 in the deep water section adopts Spiral tube, Seamless steel pipe and 28a I-beam are welded and connected by CT type; the first lock pile cofferdam 1, the second lock pile cofferdam 2, the third lock pile cofferdam 3 and the fourth lock pile cofferdam 4 in the general section are all made of Spiral tube, The seamless steel pipe is welded with 28a I-beam and connected with CT type.

[0020] The first phase of the enclosure also includes a first purlin 6 arranged between the second locking pile cofferdam 2 and the shore. The first purlin 6 is arranged in close contact with the first locking pile cofferdam 1, the second locking pile cofferdam 2, and the third locking pile cofferdam 3. A fine-grained concrete layer 13 is poured between the first purlin 6 and the first locking pile cofferdam 1, the second locking pile cofferdam 2, and the third locking pile cofferdam 3.

[0021] The second phase enclosure also includes a second purlin 7 arranged between the second locking pile cofferdam 2 and the fifth locking pile cofferdam 5. The second purlin 7 is arranged in close contact with the fourth locking pile cofferdam 4 and the fifth locking pile cofferdam 5. A fine-grained concrete layer 13 is poured between the second purlin 7 and the fourth locking pile cofferdam 4 and the fifth locking pile cofferdam 5.

[0022] A plurality of mutually parallel inner support rods 8 are arranged on the first enclosure purlin 6 to which the first locking pile cofferdam 1 and the second locking pile cofferdam 2 are attached, and both ends of each inner support rod 8 are respectively welded to the first enclosure purlin 6 through connecting plates 9;

[0023] A plurality of mutually parallel inner support rods 8 are arranged on the first enclosure purlin 6 which is in contact with the second locking pile cofferdam 2 and the third locking pile cofferdam 3, and both ends of each inner support rod 8 are respectively welded to the first enclosure purlin 6 through a connecting plate 9;

[0024] A plurality of mutually parallel inner support rods 8 are arranged on the second enclosure purlin 7 which is in contact with the fourth locking pile cofferdam 4 and the fifth locking pile cofferdam 5, and both ends of each inner support rod 8 are respectively welded to the second enclosure purlin 7 through connecting plates 9;

[0025] The internal support rods 8 are arranged in four layers from top to bottom, that is, along the direction from the top of the steel pipe pile to the foundation pit. According to the structural calculation, the number and position of the internal support rods in each layer are different. Each internal support rod 8 is connected to a vertical column 10 as a support point, and the other end of the column 10 is vertically inserted into the foundation pit;

[0026] A connection system is provided between adjacent inner support rods 8. The connection system includes at least two first channel steels 11, each of which is vertically connected between adjacent inner support rods 8; a second channel steel 12 is connected between the two first channel steels 11, and both ends of the second channel steel 12 are respectively connected to two adjacent inner supports 8. The connection system ensures the stability between the inner support rods 8.

[0027] The cofferdam lock and water stop are filled with clay balls.

[0028] Combined with the "F" type cofferdam layout and water intake construction plan, different internal support designs were carried out, and the structural safety and stability analysis was carried out by combining the finite element local model with the formula method and the overall finite element calculation method. Finally, a steel pipe pile cofferdam protection plan that meets the actual engineering requirements and is safe, effective, and economically reasonable was selected. This utility model realizes the safe and reliable construction of the water intake in the reservoir under complex geological, topographical, and high water level operating conditions of the reservoir.

[0029] Embodiment 1:

[0030] The present embodiment provides a steel pipe pile cofferdam enclosure type in a reservoir operating at a high water level, including a first-stage enclosure and a second-stage enclosure. The first-stage enclosure includes a first locking pile cofferdam 1 vertically overlapped with the shore, a second locking pile cofferdam 2 is arranged parallel to the shore at one end of the first locking pile cofferdam 1 away from the shore, one end of the second locking pile cofferdam 2 is connected to the first locking pile cofferdam 1, and the other end is vertically arranged with a third locking pile cofferdam 3 along the direction close to the shore; the second-stage enclosure includes a fourth locking pile cofferdam 4 arranged along the extension direction of the first locking pile cofferdam 1, the fourth locking pile cofferdam 4 is connected to the end of the first locking pile cofferdam 1 away from the shore; the other end of the fourth locking pile cofferdam 4 is connected to a fifth locking pile cofferdam 5, the fifth locking pile cofferdam 5 is arranged parallel to the shore, and the fifth locking pile cofferdam 5 and the second locking pile cofferdam 2 are arranged on the same side of the first locking pile cofferdam 1.

[0031] The fifth locking pile cofferdam 5 adopts Spiral tube, Seamless steel pipe and 28a I-beam are welded and connected by CT type; the first locking pile cofferdam 1, the second locking pile cofferdam 2, the third locking pile cofferdam 3 and the fourth locking pile cofferdam 4 are all made of Spiral tube, The seamless steel pipe is welded with 28a I-beam and connected with CT type.

[0032] Embodiment 2:

[0033] The present embodiment provides a steel pipe pile cofferdam enclosure type in a reservoir operating at a high water level, including a first-stage enclosure and a second-stage enclosure. The first-stage enclosure includes a first locking pile cofferdam 1 vertically overlapped with the shore, a second locking pile cofferdam 2 is arranged parallel to the shore at one end of the first locking pile cofferdam 1 away from the shore, one end of the second locking pile cofferdam 2 is connected to the first locking pile cofferdam 1, and the other end is vertically arranged with a third locking pile cofferdam 3 along the direction close to the shore; the second-stage enclosure includes a fourth locking pile cofferdam 4 arranged along the extension direction of the first locking pile cofferdam 1, the fourth locking pile cofferdam 4 is connected to the end of the first locking pile cofferdam 1 away from the shore; the other end of the fourth locking pile cofferdam 4 is connected to a fifth locking pile cofferdam 5, the fifth locking pile cofferdam 5 is arranged parallel to the shore, and the fifth locking pile cofferdam 5 and the second locking pile cofferdam 2 are arranged on the same side of the first locking pile cofferdam 1.

[0034] The fifth locking pile cofferdam 5 adopts Spiral tube, Seamless steel pipe and 28a I-beam are welded and connected by CT type; the first locking pile cofferdam 1, the second locking pile cofferdam 2, the third locking pile cofferdam 3 and the fourth locking pile cofferdam 4 are all made of Spiral tube, The seamless steel pipe is welded with 28a I-beam and connected with CT type.

[0035] The first phase of the enclosure also includes a first purlin 6 arranged between the second locking pile cofferdam 2 and the shore. The first purlin 6 is arranged in close contact with the first locking pile cofferdam 1, the second locking pile cofferdam 2, and the third locking pile cofferdam 3. A concrete layer 13 is poured between the first purlin 6 and the first locking pile cofferdam 1, the second locking pile cofferdam 2, and the third locking pile cofferdam 3.

[0036] The second phase enclosure also includes a second purlin 7 arranged between the second locking pile cofferdam 2 and the fifth locking pile cofferdam 5. The second purlin 7 is arranged in close contact with the fourth locking pile cofferdam 4 and the fifth locking pile cofferdam 5. A concrete layer 13 is poured between the second purlin 7 and the fourth locking pile cofferdam 4 and the fifth locking pile cofferdam 5.

[0037] The first purlin 6 and the second purlin 7 are both made of HM588×300×12 / 20 steel; the concrete layer 13 is made of C30 concrete.

[0038] Embodiment 3:

[0039] The present embodiment provides a steel pipe pile cofferdam enclosure type in a reservoir operating at a high water level, including a first-stage enclosure and a second-stage enclosure. The first-stage enclosure includes a first locking pile cofferdam 1 vertically overlapped with the shore, a second locking pile cofferdam 2 is arranged parallel to the shore at one end of the first locking pile cofferdam 1 away from the shore, one end of the second locking pile cofferdam 2 is connected to the first locking pile cofferdam 1, and the other end is vertically arranged with a third locking pile cofferdam 3 along the direction close to the shore; the second-stage enclosure includes a fourth locking pile cofferdam 4 arranged along the extension direction of the first locking pile cofferdam 1, the fourth locking pile cofferdam 4 is connected to the end of the first locking pile cofferdam 1 away from the shore; the other end of the fourth locking pile cofferdam 4 is connected to a fifth locking pile cofferdam 5, the fifth locking pile cofferdam 5 is arranged parallel to the shore, and the fifth locking pile cofferdam 5 and the second locking pile cofferdam 2 are arranged on the same side of the first locking pile cofferdam 1.

[0040] The fifth locking pile cofferdam 5 adopts Spiral tube, Seamless steel pipe and 28a I-beam are welded and connected by CT type; the first locking pile cofferdam 1, the second locking pile cofferdam 2, the third locking pile cofferdam 3 and the fourth locking pile cofferdam 4 are all made of Spiral tube, The seamless steel pipe is welded with 28a I-beam and connected with CT type.

[0041] The first phase of the enclosure also includes a first purlin 6 arranged between the second locking pile cofferdam 2 and the shore. The first purlin 6 is arranged in close contact with the first locking pile cofferdam 1, the second locking pile cofferdam 2, and the third locking pile cofferdam 3. A concrete layer 13 is poured between the first purlin 6 and the first locking pile cofferdam 1, the second locking pile cofferdam 2, and the third locking pile cofferdam 3.

[0042] The second phase enclosure also includes a second purlin 7 arranged between the second locking pile cofferdam 2 and the fifth locking pile cofferdam 5. The second purlin 7 is arranged in close contact with the fourth locking pile cofferdam 4 and the fifth locking pile cofferdam 5. A concrete layer 13 is poured between the second purlin 7 and the fourth locking pile cofferdam 4 and the fifth locking pile cofferdam 5.

[0043] The first purlin 6 and the second purlin 7 are both made of HM588×300×12 / 20 steel; the concrete layer 13 is made of C30 concrete.

[0044] A plurality of mutually parallel inner support rods 8 are arranged on the first enclosure purlin 6 to which the first locking pile cofferdam 1 and the second locking pile cofferdam 2 are attached, and both ends of each inner support rod 8 are respectively welded to the first enclosure purlin 6 through connecting plates 9;

[0045] A plurality of mutually parallel inner support rods 8 are arranged on the first enclosure purlin 6 which is in contact with the second locking pile cofferdam 2 and the third locking pile cofferdam 3, and both ends of each inner support rod 8 are respectively welded to the first enclosure purlin 6 through a connecting plate 9;

[0046] A plurality of mutually parallel inner support rods 8 are arranged on the second enclosure purlin 7 which is in contact with the fourth locking pile cofferdam 4 and the fifth locking pile cofferdam 5, and both ends of each inner support rod 8 are respectively welded to the second enclosure purlin 7 through a connecting plate 9;

[0047] The inner support rods 8 are arranged in four layers from the top of the steel pipe pile to the foundation pit, with four rods arranged in each layer;

[0048] Each of the inner support rods 8 is connected to a column 10, and the other end of the column 10 is vertically inserted into the foundation pit; the column is made of Q235Bh400×400 steel.

[0049] A connection system is provided between adjacent inner support rods 8. The connection system includes at least two first channel steels 11, each of which is vertically connected between adjacent inner support rods 8; a second channel steel 12 is connected between the two first channel steels 11, and both ends of the second channel steel 12 are respectively connected to two adjacent inner support rods 8. The first channel steel 11 and the second channel steel 12 are made of Q235b20 channel steel.

Claims

1. The steel pipe pile cofferdam protection type in the high water level reservoir is characterized by: The invention comprises a first-stage enclosure and a second-stage enclosure, wherein the first-stage enclosure comprises a first locking pile cofferdam (1) vertically overlapped with the shore, a second locking pile cofferdam (2) is arranged parallel to the shore at one end of the first locking pile cofferdam (1) away from the shore, one end of the second locking pile cofferdam (2) is connected to the first locking pile cofferdam (1), and the other end is vertically arranged with a third locking pile cofferdam (3) along the direction close to the shore; the second-stage enclosure comprises a fourth locking pile cofferdam (4) arranged along the extension direction of the first locking pile cofferdam (1), the fourth locking pile cofferdam (4) is connected to the end of the first locking pile cofferdam (1) away from the shore; the other end of the fourth locking pile cofferdam (4) is connected to a fifth locking pile cofferdam (5), the fifth locking pile cofferdam (5) is arranged parallel to the shore, and the fifth locking pile cofferdam (5) and the second locking pile cofferdam (2) are arranged on the same side of the first locking pile cofferdam (1).

2. The steel pipe pile cofferdam protection type in a high water level reservoir according to claim 1 is characterized in that: The first-stage enclosure also includes a first purlin (6) arranged between the second locking pile cofferdam (2) and the shore, the first purlin (6) being arranged in close contact with the first locking pile cofferdam (1), the second locking pile cofferdam (2), and the third locking pile cofferdam (3), and a concrete layer (13) is poured between the first purlin (6) and the first locking pile cofferdam (1), the second locking pile cofferdam (2), and the third locking pile cofferdam (3).

3. The steel pipe pile cofferdam protection type in a high water level reservoir according to claim 2 is characterized in that: The second-stage enclosure also includes a second purlin (7) arranged between the second locking pile cofferdam (2) and the fifth locking pile cofferdam (5); the second purlin (7) is arranged in close contact with the fourth locking pile cofferdam (4) and the fifth locking pile cofferdam (5); and a concrete layer (13) is poured between the second purlin (7) and the fourth locking pile cofferdam (4) and the fifth locking pile cofferdam (5).

4. The steel pipe pile cofferdam protection type in a high water level reservoir according to claim 3 is characterized in that: A plurality of mutually parallel inner support rods (8) are arranged on the first enclosure purlin (6) which is in contact with the first locking pile cofferdam (1) and the second locking pile cofferdam (2), and both ends of each inner support rod (8) are respectively welded to the first enclosure purlin (6) through a connecting plate (9); A plurality of mutually parallel inner support rods (8) are arranged on the first enclosure purlin (6) which is in contact with the second locking pile cofferdam (2) and the third locking pile cofferdam (3), and both ends of each inner support rod (8) are respectively welded to the first enclosure purlin (6) through a connecting plate (9); A plurality of mutually parallel inner support rods (8) are arranged on the second enclosure purlin (7) which is in contact with the fourth locking pile cofferdam (4) and the fifth locking pile cofferdam (5), and both ends of each inner support rod (8) are respectively welded to the second enclosure purlin (7) through a connecting plate (9).

5. The steel pipe pile cofferdam protection type in a high water level reservoir according to claim 4 is characterized in that: Each of the inner support rods (8) is connected to a column (10), and the other end of the column (10) is vertically inserted into the foundation pit; a connection system is provided between adjacent inner support rods (8).

6. The steel pipe pile cofferdam protection type in a high water level reservoir according to claim 5 is characterized in that: The connection system comprises at least two first channel steels (11), each of which is vertically connected between adjacent inner support rods (8); a second channel steel (12) is connected between the two first channel steels (11), and both ends of the second channel steel (12) are respectively connected to two adjacent inner support rods (8).

7. The steel pipe pile cofferdam protection type in a high water level reservoir according to claim 1 is characterized in that: The fifth locking pile cofferdam (5) adopts Spiral tube, The seamless steel pipe is welded with 28a I-beam and connected in CT type; the first locking pile cofferdam (1), the second locking pile cofferdam (2), the third locking pile cofferdam (3) and the fourth locking pile cofferdam (4) are all Spiral tube, The seamless steel pipe is welded with 28a I-beam and connected with CT type.

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