Box soil cofferdam supporting structure

Abstract

The utility model relates to a box soil cofferdam supporting structure which comprises a steel box, a plurality of inner jet grouting piles arranged on a riverbed on the inner side of the steel box and outer jet grouting piles arranged on a riverbed on the outer side of the steel box, an outer supporting assembly is arranged between the outer side of the steel box and the outer jet grouting piles, and an inner supporting assembly is arranged between the inner side of the steel box and the inner jet grouting piles. The inner supporting assembly comprises waterproof cloth, the waterproof cloth is arranged on the inner wall of an included angle between the inner side of the steel box and the inner bottom of the cofferdam, a plurality of longitudinal steel bars are embedded in the top of the inner jet grouting pile, a plurality of transverse steel bars corresponding to the longitudinal steel bars are arranged on the inner wall of the steel box, and the longitudinal steel bars and the transverse steel bars are welded to form a steel reinforcement cage. A plurality of pairs of first screws are pre-embedded in the top of the concrete base platform, and a plurality of pairs of second screws corresponding to the first screws are pre-embedded in the side wall, away from the steel box, of the concrete base platform. The cofferdam is stable, good in anti-seepage effect and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy project cofferdam structures, in particular to a box-earth cofferdam supporting structure. Background Art

[0002] With the rapid development of water conservancy and hydropower engineering, cofferdam support technology, as an important means of ensuring project safety, has received widespread attention. As a new type of cofferdam technology, box-earth cofferdam support offers advantages such as structural stability, convenient construction, and low cost, and has broad application prospects in water conservancy and hydropower engineering construction.

[0003] At present, during the construction of cofferdams, a support structure is required to reinforce the cofferdam. At present, inclined rods are often set between the cofferdam and the ground for support and reinforcement. However, the adaptability of the inclined rod support structure to geological conditions and hydrological conditions is limited, especially in environments with soft foundations or large water flows, the effect is not good; the inclined rod support structure has limited improvement on the anti-seepage performance of the cofferdam, and leakage is prone to occur. Summary of the Invention

[0004] The utility model aims to solve the deficiencies of the prior art and provides a box-earth cofferdam supporting structure.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a box-earth cofferdam support structure, comprising a steel box, and also comprising a plurality of inner rotary jet piles arranged on the riverbed inside the steel box and an outer rotary jet pile arranged on the riverbed outside the steel box, an outer support component is arranged between the outer side of the steel box and the outer rotary jet pile, an inner support component is arranged between the inner side of the steel box and the inner rotary jet pile, the inner support component comprises a waterproof cloth, the waterproof cloth is arranged on the inner wall of the angle between the inner side of the steel box and the inner bottom of the cofferdam, a plurality of longitudinal steel bars are pre-embedded on the top of the inner rotary jet pile, a plurality of transverse steel bars corresponding to the longitudinal steel bars are arranged on the inner wall of the steel box, and the longitudinal steel bars and the transverse steel bars are arranged on the inner wall of the steel box. It is welded into a steel cage, and a concrete base is cast on the outside of the steel cage. Several pairs of first screws are embedded in the top of the concrete base, and several pairs of second screws corresponding to the first screws are embedded on the side wall away from the steel box. A first pad is installed on a pair of first screws, and a second pad is installed on a pair of second screws. A vertical support rod is fixed on the first pad, and a first horizontal support rod is fixed on the second pad. The second horizontal support rod is fixed to the upper part of the vertical support rod by a cross buckle, and an oblique support rod is fixed between the second horizontal support rod and the end of the first horizontal support rod by a cross buckle. Several groups of fixing components are provided between the vertical support rod and the steel box from top to bottom.

[0006] In particular, the external support assembly includes anchor seats correspondingly installed on the outside of the steel box and on the top of the external rotary jet pile, and an anchor cable is installed between the corresponding two anchor seats.

[0007] In particular, the external support assembly includes anchor seats correspondingly installed on the outside of the steel box and the top of the external rotary jet pile, and an anchor rod is installed between the corresponding two anchor seats.

[0008] In particular, the top of the inner rotary jet pile passes through the waterproof cloth, and a sealing ring sleeve for pressing the waterproof cloth is provided on the outer side of the inner rotary jet pile.

[0009] Particularly, the first pad is sleeved on the first screw rod and is fixed by being pressed by a nut, and the second pad is sleeved on the second screw rod and is fixed by being pressed by a nut.

[0010] In particular, the fixing assembly includes a horizontal fixing plate, a vertical fixing plate, a third screw, and a fourth screw. The vertical fixing plate is fixed to one end of the horizontal fixing plate. The horizontal fixing plate is provided with a strip hole, and the vertical support rod passes through the strip hole. The fourth screw is fixed to the inner side of the steel box, and the fourth screw passes through the vertical fixing plate and is tightened and fixed by a nut. The third screw is fixed to the side of the vertical support rod away from the steel box, and the third screw passes through the horizontal fixing plate and is tightened and fixed by a nut.

[0011] Particularly, a reinforcing rod is connected between two adjacent oblique support rods.

[0012] The beneficial effect of the present invention is that the present invention can significantly improve the overall stability and pressure resistance of the cofferdam by arranging internal rotary jet piles, external rotary jet piles, internal support components, and external support components, thereby ensuring the safety of the construction process. At the same time, it can also effectively prevent water from seeping into the construction area, ensuring the dryness of the construction environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A structural diagram of the utility model;

[0014] Figure 2 This is another structural schematic diagram of the utility model;

[0015] Figure 3 This is a schematic diagram of the fixing assembly structure of the utility model;

[0016] In the figure: 1-steel box; 2-inner-rotating jet pile; 3-outer-rotating jet pile; 4-anchor seat; 5-anchor cable; 6-anchor rod; 7-waterproof cloth; 8-longitudinal reinforcement; 9-transverse reinforcement; 10-sealing ring; 11-concrete base; 12-first screw; 13-second screw; 14-first pad; 15-second pad; 16-vertical support rod; 17-first horizontal support rod; 18-second horizontal support rod; 19-oblique support rod; 20-horizontal fixing plate; 21-vertical fixing plate; 22-third screw; 23-strip hole; 24-fourth screw;

[0017] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] like Figure 1-Figure 3 As shown, a box-soil cofferdam support structure includes a steel box 1, and also includes a plurality of inner rotary jet piles 2 arranged on the riverbed inside the steel box 1 and outer rotary jet piles 3 arranged on the riverbed outside the steel box 1. An outer support component is arranged between the outer side of the steel box 1 and the outer rotary jet piles 3. The outer support component includes anchor seats 4 correspondingly installed on the outer side of the steel box 1 and the top of the outer rotary jet piles 3, and an anchor cable 5 is installed between the corresponding two anchor seats 4; or an anchor rod 6 is installed between the corresponding two anchor seats 4.

[0020] The inner rotary jet piles 2 and the outer rotary jet piles 3 cast in concrete when the bottom of the steel box 1 is sealed are connected as a whole; the anchor cables 5 or anchor rods 6 connect the outer rotary jet piles 3 and the outside of the steel box 1 to form an integral support system, further enhancing the compressive resistance of the cofferdam; the combination of the outer rotary jet piles 3 and the anchor cables 5 / anchor rods 6 provides multiple support points, making the force on the cofferdam more uniform, reducing local stress concentration, and improving the overall stability; the anchor cables 5 / anchor rods 6 fix the outer rotary jet piles 3 and the steel box 1 together, enhancing the lateral and longitudinal stability of the cofferdam, and preventing the cofferdam from displacement or tilting under the impact of water flow; the solidified body formed by the outer rotary jet piles 3 has good anti-seepage performance, which can effectively prevent water from seeping into the construction area from the bottom or side wall of the cofferdam.

[0021] An inner support assembly is provided between the inner side of the steel box 1 and the inner rotary jet pile 2. The inner support assembly includes a waterproof cloth 7, which is provided on the inner wall of the angle between the inner side of the steel box 1 and the inner bottom of the cofferdam. The top of the inner rotary jet pile 2 passes through the waterproof cloth 7, and a sealing ring 10 is provided on the outer side of the inner rotary jet pile 2 to press the waterproof cloth 7. A plurality of longitudinal steel bars 8 are pre-embedded in the top of the inner rotary jet pile 2, and a plurality of transverse steel bars 9 corresponding to the longitudinal steel bars 8 are provided on the inner wall of the steel box 1. The longitudinal steel bars 8 and the transverse steel bars 9 are welded into a steel cage. A concrete base 11 is cast on the outside of the steel cage, and several pairs of first screws 12 are embedded in the top of the concrete base 11. Several pairs of second screws 13 corresponding to the first screws 12 are embedded on the side wall away from the steel box 1. A first pad 14 is installed on a pair of first screws 12, and a second pad 15 is installed on a pair of second screws 13. The first pad 14 is sleeved on the first screw 12 and fixed by a nut, and the second pad 15 is sleeved on the second screw 13 and fixed by a nut.

[0022] The solidified body formed by the inner rotary jet pile 2 has good anti-seepage performance, which can effectively prevent water from seeping into the construction area from the bottom or side wall of the cofferdam; a concrete base 11 is set at the inner angle of the inner rotary jet pile 2 and the steel box 1 to form a firm connection, ensuring a close connection between the inner rotary jet pile 2 and the steel box 1, preventing water from seeping into the gap, and a waterproof cloth 7 is set at the bottom of the concrete base to effectively prevent water from seeping into the construction area from the bottom of the cofferdam, thereby ensuring the dryness of the construction area.

[0023] A vertical support rod 16 is fixed to the first pad 14, a first horizontal support rod 17 is fixed to the second pad 15, a second horizontal support rod 18 is fixed to the upper part of the vertical support rod 16 through a cross buckle, an oblique support rod 19 is fixed between the second horizontal support rod 18 and the end of the first horizontal support rod 17 through a cross buckle, and a plurality of fixing components are arranged between the vertical support rod 16 and the steel box 1 from top to bottom; the fixing components include a horizontal fixing plate 20, a vertical fixing plate 21, a third screw 22, and a fourth screw 24. The vertical fixing plate 21 is fixed to one end of the horizontal fixing plate 20. The horizontal fixing plate 20 is provided with a strip hole 23. The vertical support rod 16 passes through the strip hole 23. The fourth screw 24 is fixed to the inner side of the steel box 1, and the fourth screw 24 passes through the vertical fixing plate 21 and is tightened and fixed by a nut. The third screw 22 is fixed to the side of the vertical support rod 16 away from the steel box 1, and the third screw 22 passes through the horizontal fixing plate 20 and is tightened and fixed by a nut. A reinforcing rod is connected between two adjacent oblique support rods 19.

[0024] The arrangement of the vertical support rods 16, the first horizontal support rods 17, the second horizontal support rods 18, the oblique support rods 19, the reinforcing rods and the fixing components can provide additional support force and further enhance the compressive resistance of the cofferdam; geological adaptability: the combination of the internal rotary jet piles 2 and the internal support components can adapt to different geological conditions, and can provide effective support for both soft foundations and hard foundations; it can also effectively cope with different hydrological conditions, and can maintain the stability of the cofferdam even when the water flow is large or the water level changes frequently.

[0025] The utility model can significantly improve the overall stability and pressure resistance of the cofferdam and ensure the safety of the construction process by arranging inner rotary jet piles 2, outer rotary jet piles 3, inner support components and outer support components. At the same time, it can also effectively prevent water from seeping into the construction area and ensure the dryness of the construction environment.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A box-earth cofferdam support structure, comprising a steel box (1), characterized in that: The invention also includes a plurality of inner rotary jet piles (2) arranged on the riverbed inside the steel box (1) and an outer rotary jet pile (3) arranged on the riverbed outside the steel box (1); an outer support assembly is arranged between the outer side of the steel box (1) and the outer rotary jet pile (3); an inner support assembly is arranged between the inner side of the steel box (1) and the inner rotary jet pile (2); the inner support assembly includes a waterproof cloth (7); the waterproof cloth (7) is arranged on the inner wall of the angle between the inner side of the steel box (1) and the inner bottom of the cofferdam; a plurality of longitudinal steel bars (8) are pre-buried on the top of the inner rotary jet pile (2); a plurality of transverse steel bars (9) corresponding to the longitudinal steel bars (8) are arranged on the inner wall of the steel box (1); the longitudinal steel bars (8) and the transverse steel bars (9) are welded into a steel cage; a concrete base (11) is poured on the outer side of the steel cage; the concrete base (11) ) A plurality of pairs of first screw rods (12) are embedded in the top, and a plurality of pairs of second screw rods (13) corresponding to the first screw rods (12) are embedded in the side wall away from the steel box (1). A first pad (14) is installed on a pair of first screw rods (12), and a second pad (15) is installed on a pair of second screw rods (13). A vertical support rod (16) is fixed on the first pad (14), and a first horizontal support rod (17) is fixed on the second pad (15). A second horizontal support rod (18) is fixed to the upper part of the vertical support rod (16) through a cross buckle. An oblique support rod (19) is fixed between the ends of the second horizontal support rod (18) and the first horizontal support rod (17) through a cross buckle. A plurality of groups of fixing components are provided from top to bottom between the vertical support rod (16) and the steel box (1).

2. The box-earth cofferdam support structure according to claim 1, characterized in that: The external support assembly comprises anchor seats (4) correspondingly installed on the outside of the steel box (1) and on the top of the external rotary jet pile (3), and an anchor cable (5) is installed between the two corresponding anchor seats (4).

3. The box-earth cofferdam support structure according to claim 1, characterized in that: The external support assembly comprises anchor seats (4) correspondingly installed on the outside of the steel box (1) and on the top of the external rotary jet pile (3), and an anchor rod (6) is installed between the two corresponding anchor seats (4).

4. The box-earth cofferdam support structure according to claim 1, characterized in that: The top of the inner rotary jet pile (2) passes through the waterproof cloth (7), and a sealing ring sleeve (10) for pressing the waterproof cloth (7) is provided on the outer side of the inner rotary jet pile (2).

5. The box-earth cofferdam support structure according to claim 1, characterized in that: The first pad (14) is sleeved on the first screw rod (12) and is fixed by pressing with a nut, and the second pad (15) is sleeved on the second screw rod (13) and is fixed by pressing with a nut.

6. The box-earth cofferdam support structure according to claim 1, characterized in that: The fixing assembly comprises a horizontal fixing plate (20), a vertical fixing plate (21), a third screw rod (22), and a fourth screw rod (24). The vertical fixing plate (21) is fixed to one end of the horizontal fixing plate (20). The horizontal fixing plate (20) is provided with a strip hole (23). The vertical support rod (16) passes through the strip hole (23). The fourth screw rod (24) is fixed to the inner side of the steel box (1), and the fourth screw rod (24) passes through the vertical fixing plate (21) and is fixed by a nut. The third screw rod (22) is fixed to the side of the vertical support rod (16) away from the steel box (1), and the third screw rod (22) passes through the horizontal fixing plate (20) and is fixed by a nut.

7. The box-earth cofferdam support structure according to claim 1, characterized in that: A reinforcing rod is connected between two adjacent oblique support rods (19).

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