A riverside steel sheet pile cofferdam and construction method

Abstract

The present invention provides a riverside steel sheet pile cofferdam and construction method, wherein filling gaps are provided between single-layer linear cofferdams, and two single-layer linear cofferdams are connected by a support plate, and a filler is provided in the filling gaps, and an anti-corrosion layer is provided on the side of the single-layer linear cofferdam that contacts the water body; each single-layer linear cofferdam comprises a plurality of steel sheet pile bodies connected end to end, and a sealing plug is provided between two adjacent steel sheet pile bodies, and the sealing plug is used to prevent water from seeping into the filling gaps, and the sealing plug is located on the side of the steel sheet pile body that contacts the water body, and one end of the support plate is connected to the other side of the steel sheet pile body. The riverside steel sheet pile cofferdam and construction method described in the present invention, wherein the filling gaps are filled with a filler in order to support the structural strength of the single-layer linear cofferdams on both sides, a road can be formed between the two single-layer linear cofferdams by the filler, and the sealing plug can prevent water from seeping into the filling gaps by the sealing plug, so as to cut off the water in the river.

Description

Technical Field

[0001] The invention belongs to the field of riverside cofferdams, and in particular relates to a riverside steel sheet pile cofferdam and a construction method. Background Art

[0002] There are many types of traditional cofferdams, including earth-rock cofferdams, concrete cofferdams, steel sheet pile cofferdams, grass-soil cofferdams, rock cofferdams, etc. When traditional cofferdams are used, the unbalanced head pressure on both sides will cause water to seep and leak through the cofferdam, resulting in production safety hazards when constructing on one side of the cofferdam. In addition, the cost of regularly discharging water is high, which affects the construction period. In application conditions that require water protection and surrounding ecological environment protection, water that seeps into the construction area is likely to cause environmental pollution when discharged. Summary of the invention

[0003] In view of this, the present invention aims to propose a riverside steel sheet pile cofferdam to solve the problem that the riverside cofferdam in the prior art is affected by the head pressure and has leakage.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A riverside steel sheet pile cofferdam comprises two single-layer linear cofferdams, the two single-layer linear cofferdams are arranged parallel to each other and opposite to each other, a filling gap is arranged between the two single-layer linear cofferdams, and the two single-layer linear cofferdams are connected by a supporting plate, a filling material is filled in the filling gap, and an anti-corrosion layer is arranged on the side of the single-layer linear cofferdam contacting the water body;

[0006] Furthermore, each of the single-layer linear cofferdams comprises a plurality of steel sheet pile bodies connected end to end, a sealing plug is arranged between two adjacent steel sheet pile bodies, the sealing plug is used to prevent water from seeping into the filling gap, and the sealing plug is located on the side of the steel sheet pile body contacting the water body, and one end of the support plate is connected to the other side of the steel sheet pile body;

[0007] Furthermore, the steel sheet pile body comprises a supporting body, and a first sealing plate and a second sealing plate are respectively arranged on both sides of the supporting body, and the first sealing plate and the second sealing plate between two adjacent supporting bodies abut against each other, and the abutment between the first sealing plate and the second sealing plate is a rough sealing structure of the two adjacent supporting bodies;

[0008] Furthermore, the supporting body is a U-shaped structure, the open end of the U-shaped structure faces the filling gap, and the first sealing plate and the second sealing plate are respectively located on the outer walls of both sides of the open end;

[0009] Further, the cross section of the first sealing plate is an L-shaped structure, the cross section of the second sealing plate is a J-shaped structure, and the L-shaped structure and the J-shaped structure are interlocked;

[0010] Furthermore, the support body, the first sealing plate and the second sealing plate are an integral structure;

[0011] Furthermore, a structural groove is provided between two adjacent supporting bodies, and a sealing plugging object is filled in the structural groove to be a supplementary sealing structure between the two supporting bodies, the cross section of the structural groove is a trapezoidal structure, the first sealing plate and the second sealing plate abutting each other are the short side bottoms of the trapezoidal structure, the long side bottom of the trapezoidal structure is close to the water body, and the cross section of the sealing plugging object matches the cross section of the structural groove, so that the water body can press the sealing plugging object into the structural groove;

[0012] Furthermore, the support plate is connected to one side of the support body through a support block, the cross section of the support block is a trapezoidal structure, and one end of the support plate is mounted to the upper slope of the support block.

[0013] Compared with the prior art, the riverside steel sheet pile cofferdam described in the present invention has the following beneficial effects:

[0014] (1) In the steel sheet pile cofferdam along a river described in the present invention, fillers are arranged in the filling gaps to support the structural strength of the single-layer linear cofferdams on both sides. The fillers can form a road between the two single-layer linear cofferdams, and the sealing plugs can prevent water from seeping into the filling gaps, so as to cut off the water in the river.

[0015] (2) In the steel sheet pile cofferdam along a river described in the present invention, the first sealing plate and the second sealing plate abut against each other to form a rough sealing structure of two adjacent supporting bodies. The rough sealing structure can temporarily cut off the water body, but in the case of head pressure, the rough sealing structure cannot hinder the seepage of the water body. At this time, the rough sealing structure is compensated and sealed by the sealing plug to prevent the seepage of the water body.

[0016] (3) The steel sheet pile cofferdam along a river described in the present invention has a supporting body that is a U-shaped structure, the open end of the U-shaped structure faces the filling gap, the first sealing plate and the second sealing plate are respectively located on the outer walls on both sides of the open end, and the filler can compact the U-shaped structure to prevent the steel sheet pile body from being deformed due to water pressure.

[0017] (4) In the steel sheet pile cofferdam along the river described in the present invention, the water body can press the long side bottom of the sealing plugging material, forcing the short side bottom to be in close contact with the structural groove to prevent seepage in this part. The sealing plugging material is an elastic foam rubber. The sealing plugging material is adhered to the inside of the structural groove when it is laid. The crimping structure can prevent the sealing plugging material from breaking with the structural groove, thereby increasing the reliability of the seal.

[0018] (5) In the steel sheet pile cofferdam along the river described in the present invention, the support block with a trapezoidal structure is used to facilitate the rapid installation of the support plate, and the lower slope of the support block does not affect the pile sinking. During installation, the support plate can be positioned by the staff by naturally placing it on the support block. By welding the support block and the support plate, the two can be fixedly connected.

[0019] Another object of the present invention is to propose a construction method for a riverside steel sheet pile cofferdam to solve the problem that it is inconvenient to seal the steel sheet pile interface under water in the prior art.

[0020] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0021] A construction method for a riverside steel sheet pile cofferdam comprises the following steps:

[0022] S1. Insert the lower end of the steel sheet pile body into the hard foundation under the water body by static pressure piling;

[0023] S2. The steel sheet pile bodies are stacked in sequence to form a single-layer linear cofferdam, and two single-layer linear cofferdams are arranged opposite to each other;

[0024] S3. Use a lifting device to hoist an underwater spraying device and fill the structural groove between two adjacent steel sheet pile bodies with sealing plugging materials;

[0025] S4. After the steel sheet piles are filled and sealed, support plates are set beyond the water body;

[0026] S5. Lay planks on the support plate to form a temporary construction road for lifting equipment;

[0027] S6. Pumping out water from the filling gap between the two single-layer linear cofferdams that have completed the sealing and plugging operations, and setting up support plates as the water level drops;

[0028] S7. Fill the filling gap with filler.

[0029] Furthermore, the underwater operation spraying device includes a support frame and an underwater operation box, and the support frame and the underwater operation box are arranged opposite to each other, and a hydraulic telescopic rod is respectively arranged on the support frame and the underwater operation box, and the upper ends of the hydraulic telescopic rod are connected to the lifting equipment through a cross beam, one side of the support frame can be abutted to one side of the steel sheet pile body, one side of the underwater operation box can be sealed and connected to the other side of the steel sheet pile body, and an outlet pipe is provided on the underwater operation box, and the water in the underwater operation box can be discharged through the outlet pipe, and a first nozzle is arranged in the underwater operation box, and the first nozzle is used to spray the sealing plugging material into the structural groove.

[0030] Furthermore, the support frame includes a first frame body, a roller is arranged at one end of the first frame body, the outer periphery of the roller is rollingly connected to one side of the steel sheet pile body, the other end of the first frame body is connected to the execution end of the first push rod, the first push rod is fixedly connected to the execution end of the hydraulic telescopic rod, and the first push rod is used to push the first frame body and the roller close to or away from the steel sheet pile body.

[0031] Furthermore, one side of the underwater working box is connected to the execution end of the second push rod, the second push rod is connected to the execution end of the hydraulic telescopic rod, and the other side of the underwater working box is provided with an opening, and a sealing rubber pad is provided on the outer edge of the opening. The second push rod is used for the side of the underwater working box close to or away from the steel sheet pile body, and the steel sheet pile body is sealed to the underwater working box through the sealing rubber pad. A sliding sealing plate is provided at each end of the underwater working box, each sliding sealing plate can be inserted into the structural groove, and the outer periphery of the sliding sealing plate can be sealed and connected to the trapezoidal structure of the structural groove.

[0032] Furthermore, a slide groove is respectively provided at both ends of the underwater operation box, and a sliding sealing plate is arranged in each slide groove. The cross-section of the sliding sealing plate is a trapezoidal structure. The outer contour dimension of the sliding sealing plate is smaller than the inner circle contour dimension of the structural groove. An airbag is arranged on the periphery of the sliding sealing plate. The external inflation device can fill the inflatable airbag with compressed medium. The compressed medium is used for the inflation of the airbag. The inflated airbag constitutes a sealing structure between the sliding sealing plate and the structural groove.

[0033] Furthermore, one end of the sliding blocking plate is connected to the execution end of the third push rod through a floating assembly, and the third push rod is fixedly installed on the underwater operation box. The floating assembly includes a first support rod, a floating support rod, a second support rod and a first touch switch. One end of the first support rod is fixedly connected to the sliding blocking plate, and the other end of the first support rod is provided with a floating support rod for installation. One end of the floating support rod is slidably connected to the inner ring of the second support rod, and one end of the second support rod is fixedly connected to the execution end of the third push rod. A first spring is arranged on the periphery of the floating support rod, and the two ends of the first spring are respectively fixedly connected to one end of the first support rod and one end of the second support rod. A first baffle is arranged on the inner ring of the second support rod, and a first sliding hole is arranged in the middle of the first baffle. The first sliding hole is slidably connected to the first sliding rod, and the first touch switch is installed on one end of the first sliding rod. The execution end of the first touch switch can contact one end of the floating support rod, and the other end of the first sliding rod is threadedly connected to the first nut. A second spring is arranged on the periphery of the first sliding rod, and the two ends of the second spring are respectively fixedly connected to one end of the first nut and one end of the first baffle.

[0034] Furthermore, a bottoming assembly is arranged under the underwater operation box, and the bottoming assembly includes a downward pressure head, a third support rod is arranged at one end of the downward pressure head, a second sliding hole is arranged on the underwater operation box, the periphery of the third support rod is sealed and connected to the second sliding hole, and the periphery of the third support rod can slide axially along the second sliding hole, a second baffle is installed at one end of the third support rod, a third spring is arranged at the periphery of the third support rod, and two ends of the third spring are respectively fixedly connected to the side wall of the underwater operation box and one end of the second baffle, a third baffle is arranged inside the underwater operation box body, a third sliding hole is arranged on the third baffle, a second sliding rod is slidably connected in the third sliding hole, a second touch switch is installed at one end of the second sliding rod, and one end of the second baffle can contact the execution end of the second touch switch, a second nut is installed at the other end of the second sliding rod, a fourth spring is arranged at the periphery of the second sliding rod, and two ends of the fourth spring are respectively fixedly connected to one end of the second nut and one end of the third baffle.

[0035] Furthermore, the cross section of the pressing head is a trapezoidal structure.

[0036] Furthermore, a linear drive assembly is arranged in the underwater operation box, and a first nozzle, a second nozzle, a CCD camera and a pressure sensor are respectively installed on the execution end of the linear drive assembly. The second nozzle is used to spray compressed air into the structural groove, and the compressed air is used to clean the structural groove. The first nozzle is used to spray sealing plugging materials into the cleaned structural groove. The CCD camera is used to observe the state of the structural groove, and the pressure sensor is used to detect the air pressure in the underwater operation box.

[0037] Furthermore, an air injection pipe and an air release pipe are respectively arranged above the underwater operation box, a water outlet pipe is arranged below the underwater operation box, and a pressure relief valve is installed on the air release pipe.

[0038] Compared with the prior art, the construction method of a riverside steel sheet pile cofferdam described in the present invention has the following advantages:

[0039] (1) In the construction method of a riverside steel sheet pile cofferdam described in the present invention, the hydraulic telescopic rod of the underwater operation spraying device is used to adjust the relative height of the underwater operation box and the support frame. By clamping the underwater operation box and the support frame, the steel sheet pile body is ensured not to fall during construction, and the underwater operation box and the steel sheet pile body are simultaneously sealed.

[0040] (2) The construction method of a riverside steel sheet pile cofferdam described in the present invention ensures the seal between the underwater working box and the steel sheet pile body by using a sealing rubber pad. At the same time, the structural groove on one side of the steel sheet pile body is sealed by two sliding sealing plates to ensure that there is no water disturbance in the underwater working box during underwater spraying operations.

[0041] (3) In the construction method of a riverside steel sheet pile cofferdam described in the present invention, a water outlet pipe arranged below an underwater working box is connected to the external environment through a pipeline. After the underwater working box is attached to the steel sheet pile body, air pressure is injected into the underwater working box through an air injection pipe, and water is discharged from the water outlet pipe arranged below. As the pressure is continuously injected, the water is emptied, and then the water outlet pipe is closed and the underwater working box is pressurized to prevent water from entering the box. During the pressure maintenance process, if the pressure inside the box is too high, the pressure is released through the air release pipe.

[0042] (4) In the construction method of a riverside steel sheet pile cofferdam described in the present invention, when the sliding sealing plate slides into the structural groove, the airbag does not contact the structural groove to prevent scratches on the airbag, and the airbag can fit tightly to the side wall of the structural groove after being expanded by gas injection to ensure the sealing of this part.

[0043] (5) In the construction method of a riverside steel sheet pile cofferdam described in the present invention, the first touch switch is a sliding sealing plate bottom stop switch. When the third push rod drives the sliding sealing plate to slide to the bottom of the structural groove, the sliding sealing plate is interfered and cannot move. At this time, the end of the floating support rod moves relative to the first touch switch and gradually contacts the first touch switch. At this time, it means that the sliding sealing plate has moved into place, and the third push rod stops pushing the sliding sealing plate. The first spring is used for elastic reset of the floating support rod, and the second spring is used for elastic reset of the first touch switch. The first touch switch can slide along the axial direction of the first slide rod when squeezed, so as to prevent hard contact from causing damage to parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0045] Figure 1 This is a schematic structural diagram of a riverside steel sheet pile cofferdam according to an embodiment of the present invention;

[0046] Figure 2 This is a schematic structural diagram of a steel sheet pile body according to an embodiment of the present invention;

[0047] Figure 3 It is a top view schematic diagram of a steel sheet pile body according to an embodiment of the present invention;

[0048] Figure 4 It is a schematic top view of a riverside steel sheet pile cofferdam according to an embodiment of the present invention;

[0049] Figure 5 This is a schematic diagram of the structure of the underwater operation spraying device according to an embodiment of the present invention;

[0050] Figure 6It is a structural schematic diagram of a support frame according to an embodiment of the present invention;

[0051] Figure 7 This is a schematic structural diagram of a sliding blocking plate according to an embodiment of the present invention;

[0052] Figure 8 It is a cross-sectional schematic diagram of a floating assembly according to an embodiment of the present invention;

[0053] Fig. 9 This is a schematic structural diagram of an underwater operation box according to an embodiment of the present invention;

[0054] Fig.10 It is a structural schematic diagram of the assembly of the underwater operation box and the bottom contact component according to an embodiment of the present invention.

[0055] Description of reference numerals:

[0056] 100-single-layer linear cofferdam; 101-structural groove; 102-short side bottom; 200-filling gap; 300-support plate; 400-sealing plugging material; 500-underwater operation spraying device; 1-steel sheet pile body; 11-support body; 12-first sealing plate; 13-second sealing plate; 14-support block; 2-support frame; 21-first frame; 22-roller; 23-first push rod; 3-underwater operation box; 31-water outlet pipe; 32-first nozzle; 33-second push rod; 34-sealing rubber pad; 3 5-linear drive assembly; 36-deflation pipe; 37-injection pipe; 4-hydraulic telescopic rod; 5-crossbeam; 6-sliding blocking plate; 61-airbag; 62-third push rod; 63-first support rod; 64-floating support rod; 65-second support rod; 66-first spring; 67-first baffle; 68-first slide rod; 69-first nut; 610-second spring; 7-bottoming assembly; 71-down pressure head; 72-third support rod; 73-second baffle; 74-third baffle; 75-third spring; 76-fourth spring. DETAILED DESCRIPTION

[0057] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0060] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0061] like Figure 1-Figure 4 As shown, a riverside steel sheet pile cofferdam includes two single-layer linear cofferdams 100, which are parallel to each other and opposite to each other. A filling gap 200 is provided between the two single-layer linear cofferdams 100, and the two single-layer linear cofferdams 100 are connected by a supporting plate 300. Fillers are filled in the filling gap 200, and an anti-corrosion layer is provided on the side of the single-layer linear cofferdam 100 that contacts the water body. The anti-corrosion layer is an aluminized layer or an organic coating in the prior art. The filler is filled in the filling gap 200 to support the structural strength of the single-layer linear cofferdams 100 on both sides, and a road can be formed between the two single-layer linear cofferdams 100 through the filler.

[0062] Each single-layer linear cofferdam 100 includes a plurality of steel sheet pile bodies 1 connected end to end, and a sealing plug 400 is arranged between two adjacent steel sheet pile bodies 1. The sealing plug 400 is used to prevent water from seeping into the filling gap 200, and the sealing plug 400 is located on the side of the steel sheet pile body 1 contacting the water body, and one end of the support plate 300 is connected to the other side of the steel sheet pile body 1. The sealing plug 400 can prevent water from seeping into the filling gap 200, so as to cut off the water in the river, and the sealing plug 400 of this embodiment is a polyurethane elastic foam according to the prior art.

[0063] The steel sheet pile body 1 includes a supporting body 11, and a first sealing plate 12 and a second sealing plate 13 are respectively arranged on both sides of the supporting body 11. The first sealing plate 12 and the second sealing plate 13 between two adjacent supporting bodies 11 abut against each other, and the first sealing plate 12 and the second sealing plate 13 abut against each other, which is a rough sealing structure of two adjacent supporting bodies 11. The rough sealing structure can temporarily cut off the water body, but in the case of water head pressure, the rough sealing structure cannot hinder the seepage of the water body. At this time, the rough sealing structure is compensated and sealed by the sealing plug 400 to prevent water seepage. The supporting body 11 is a U-shaped structure, and the open end of the U-shaped structure faces the filling gap 200. The first sealing plate 12 and the second sealing plate 13 are respectively located on the outer walls of both sides of the open end. The filler can compact the U-shaped structure to prevent the steel sheet pile body 1 from deforming due to water pressure.

[0064] like Figure 3 and Figure 4 As shown, the cross-section of the first sealing plate 12 is an L-shaped structure, and the cross-section of the second sealing plate 13 is a J-shaped structure, and the L-shaped structure and the J-shaped structure are interlocked with each other; rough sealing is achieved by mutual support and blocking, and in order to facilitate the production of the steel sheet pile body 1, the support body 11, the first sealing plate 12 and the second sealing plate 13 are a bent integrated structure.

[0065] A structural groove 101 is provided between two adjacent supporting bodies 11. A sealing plugging object 400 is filled in the structural groove 101 to serve as a supplementary sealing structure between the two supporting bodies 11. The cross-section of the structural groove 101 is a trapezoidal structure. The first sealing plate 12 and the second sealing plate 13 abutting each other are the short side bottom 102 of the trapezoidal structure. The long side bottom of the trapezoidal structure is close to the water body, and the cross-section of the sealing plugging object 400 matches the cross-section of the structural groove 101. The water body can crimp the sealing plugging object 400 in the structural groove 101. The water body can crimp the long side bottom of the sealing plugging object 400, forcing the short side bottom 102 to be in close contact with the structural groove 101 to prevent this part from seeping. In this embodiment, the sealing plugging object 400 is an elastic foam glue. The sealing plugging object 400 is adhered to the inside of the structural groove 101 when it is laid. The crimping structure can prevent the sealing plugging object 400 from breaking with the structural groove 101, thereby increasing the reliability of the seal.

[0066] The support plate 300 is connected to one side of the support body 11 through the support block 14. The cross-section of the support block 14 is a trapezoidal structure. One end of the support plate 300 is installed to the upper slope of the support block 14. The trapezoidal support block 14 is used to facilitate the rapid installation of the support plate 300, and the lower slope of the support block 14 does not affect the pile driving. During installation, the staff can naturally place the support plate 300 on the support block 14 to achieve the positioning of the support plate 300. By welding the support block 14 and the support plate 300, the fixed connection between the two can be completed.

[0067] A construction method for a riverside steel sheet pile cofferdam comprises the following steps:

[0068] S1. By using the existing technology, the lower end of the steel sheet pile body 1 is inserted into the hard foundation under the water body in a static pressure pile planting manner. The insertion depth is based on the actual working conditions, and the working platform for pile planting can be a ship hull.

[0069] S2, stacking the steel sheet pile bodies 1 in sequence to form a single-layer linear cofferdam 100, and arranging two single-layer linear cofferdams 100 opposite to each other;

[0070] S3, hoisting the underwater operation spraying device 500 by a lifting device, the lifting device is a prior art, and filling the sealing plug 400 in the structural groove 101 between two adjacent steel sheet pile bodies 1;

[0071] S4. The steel sheet piles of the sealing plug 400 are filled and the support plates 300 are arranged beyond the water body to provide preliminary support for the two single-layer linear cofferdams 100;

[0072] S5. Laying a paving board on the support plate 300 to form a temporary construction road for the lifting equipment. With the filling of the sealing plug 400, the temporary construction road covers the entire cofferdam;

[0073] S6. After the filling process of the cofferdam sealing plugging material 400 is completed, the temporary road is dismantled, and then the filling gap 200 is pumped out, and the support plate 300 is set up as the water level drops. The number of layers of the support plate 300 is based on the actual working conditions;

[0074] S7. Fill the filling gap 200 with filler, so that the filler is flush with the upper end of the steel sheet pile body 1, and a road is formed between the two single-layer linear cofferdams 100.

[0075] like Figure 5-Figure 10 As shown, the underwater operation spraying device 500 includes a support frame 2 and an underwater operation box 3, and the support frame 2 and the underwater operation box 3 are arranged opposite to each other, and a hydraulic telescopic rod 4 is respectively arranged on the support frame 2 and the underwater operation box 3, and the upper ends of the hydraulic telescopic rod 4 are connected to the lifting equipment through the crossbeam 5, one side of the support frame 2 can abut against one side of the steel sheet pile body 1, one side of the underwater operation box 3 can be sealed and connected to the other side of the steel sheet pile body 1, and an outlet pipe 31 is provided on the underwater operation box 3, and the water in the underwater operation box 3 can be discharged from the outlet pipe 31, and a first nozzle 32 is arranged in the underwater operation box 3, and the first nozzle 32 is used to spray the sealing plugging material 400 into the structural groove 101, and the hydraulic telescopic rod 4 is used to adjust the relative height of the underwater operation box 3 and the support frame 2, and the steel sheet pile body 1 is ensured not to fall over during construction by clamping the underwater operation box 3 and the support frame 2, and the underwater operation box 3 and the steel sheet pile body 1 are simultaneously ensured to be sealed.

[0076] An air injection pipe 37 and an air release pipe 36 are respectively arranged above the underwater working box 3, a water outlet pipe 31 is arranged below the underwater working box 3, and a pressure relief valve is installed on the air release pipe 36. The water outlet pipe 31 arranged below the underwater working box 3 is connected to the external environment through a pipeline. After the underwater working box 3 is attached to the steel sheet pile body 1, air pressure is injected into the underwater working box 3 through the air injection pipe 37, and the water is discharged from the water outlet pipe 31 arranged below. As the pressure is continuously injected, the water is emptied, and then the water outlet pipe 31 is closed and the underwater working box 3 is pressurized to prevent water from entering the box. During the pressure maintaining process, if the pressure inside the box is too high, the pressure is released through the air release pipe 36, and a pressure relief valve of the prior art is arranged on the air release pipe 36, and its rated pressure relief pressure is adjustable to ensure that the pressure inside the box is controllable.

[0077] The support frame 2 includes a first frame body 21, and a roller 22 is arranged at one end of the first frame body 21. The periphery of the roller 22 is rollingly connected to one side of the steel sheet pile body 1. The other end of the first frame body 21 is connected to the execution end of the first push rod 23. The first push rod 23 is fixedly connected to the execution end of the hydraulic telescopic rod 4. The first push rod 23 is used to push the first frame body 21 and the roller 22 to approach or move away from the steel sheet pile body 1. The roller 22 is rollingly connected in the U-shaped groove of the steel sheet pile body 1 to facilitate movement without scratching the steel sheet pile body 1.

[0078] One side of the underwater working box 3 is connected to the execution end of the second push rod 33, and the second push rod 33 is connected to the execution end of the hydraulic telescopic rod 4. The other side of the underwater working box 3 is provided with an opening, and a sealing rubber pad 34 is provided on the outer edge of the opening. The second push rod 33 is used for the underwater working box 3 to approach or move away from one side of the steel sheet pile body 1, and the steel sheet pile body 1 is sealed and connected to the underwater working box 3 through the sealing rubber pad 34. A sliding sealing plate 6 is provided at each end of the underwater working box 3, each sliding sealing plate 6 can be inserted into the structural groove 101, and the outer periphery of the sliding sealing plate 6 can be sealed and connected to the trapezoidal structure of the structural groove 101. The sealing between the underwater working box 3 and the steel sheet pile body 1 is ensured by the sealing rubber pad 34. At the same time, the structural groove 101 on one side of the steel sheet pile body 1 is sealed by two sliding sealing plates 6 to ensure that there is no water disturbance in the underwater working box 3 during underwater spraying operations.

[0079] A slide groove is provided at each end of the underwater operation box 3, and a sliding sealing plate 6 is provided in each slide groove. The cross-section of the sliding sealing plate 6 is a trapezoidal structure. The outer contour size of the sliding sealing plate 6 is smaller than the inner circle contour size of the structural groove 101. An airbag 61 is provided on the periphery of the sliding sealing plate 6. An external inflation device can fill the inflatable airbag 61 with a compressed medium, and the compressed medium is used for the inflation of the airbag 61. The inflated airbag 61 constitutes a sealing structure between the sliding sealing plate 6 and the structural groove 101. When the sliding sealing plate 6 slides into the structural groove 101, the airbag 61 does not contact the structural groove 101 to prevent scratches on the airbag 61. After the airbag 61 is inflated by air injection, it can fit tightly to the side wall of the structural groove 101 to ensure the sealing of this part.

[0080] One end of the sliding blocking plate 6 is connected to the execution end of the third push rod 62 through a floating assembly, and the third push rod 62 is fixedly installed on the underwater operation box 3. The floating assembly includes a first support rod 63, a floating support rod 64, a second support rod 65 and a first touch switch. One end of the first support rod 63 is fixedly connected to the sliding blocking plate 6, and the other end of the first support rod 63 is provided with a floating support rod 64 for installation. One end of the floating support rod 64 is slidably connected to the inner ring of the second support rod 65, and one end of the second support rod 65 is fixedly connected to the execution end of the third push rod 62. A first spring 66 is arranged on the periphery of the floating support rod 64, and the two ends of the first spring 66 are respectively fixedly connected to one end of the first support rod 63 and one end of the second support rod 65. A first baffle 67 is arranged on the inner ring of the second support rod 65, and a first sliding hole is arranged in the middle of the first baffle 67. A first sliding hole is slidably connected to a first sliding rod 68 in the first sliding hole, and a first touch switch is installed on one end of the first sliding rod 68. The first touch switch is a push-type micro-touch switch in the prior art. The execution end of a touch switch can contact one end of the floating support rod 64, and the other end of the first slide rod 68 is threadedly connected to the first nut 69. A second spring 610 is arranged on the periphery of the first slide rod 68, and the two ends of the second spring 610 are respectively fixedly connected to one end of the first nut 69 and one end of the first baffle 67. The first touch switch is a bottom stop switch for the sliding blocking plate 6. When the third push rod 62 drives the sliding blocking plate 6 to slide to the bottom in the structural groove 101, the sliding blocking plate 6 is interfered and cannot move. At this time, the end of the floating support rod 64 moves relative to the first touch switch and gradually contacts the first touch switch. At this time, it represents that the sliding blocking plate 6 moves into place, and the third push rod 62 stops pushing the sliding blocking plate 6. The first spring 66 is used for the elastic reset of the floating support rod 64, and the second spring 610 is used for the elastic reset of the first touch switch. The first touch switch is squeezed and can slide axially along the first slide rod 68 to prevent hard contact from causing damage to the parts.

[0081] A bottoming assembly 7 is arranged below the underwater operation box 3, and the bottoming assembly 7 includes a downward pressure head 71, and a third support rod 72 is arranged at one end of the downward pressure head 71. A second sliding hole is arranged on the underwater operation box 3, and the periphery of the third support rod 72 is sealed and connected to the second sliding hole, and the periphery of the third support rod 72 can slide axially along the second sliding hole, and a second baffle plate 73 is installed at one end of the third support rod 72, and a third spring 75 is arranged at the periphery of the third support rod 72, and the two ends of the third spring 75 are respectively fixedly connected to the side wall of the underwater operation box 3 and one end of the second baffle plate 73, and a third baffle plate 74 is arranged inside the underwater operation box 3, and a third sliding hole is arranged on the third baffle plate 74, and the second sliding rod is slidably connected in the third sliding hole, and the second sliding rod A second touch switch is installed at one end, one end of the second baffle plate 73 can contact the execution end of the second touch switch, the second touch switch is a push-type micro-touch switch of the prior art, a second nut is installed at the other end of the second slide rod, a fourth spring 76 is arranged on the periphery of the second slide rod, and both ends of the fourth spring 76 are respectively fixedly connected to one end of the second nut and one end of the third baffle plate 74. Like the principle of the first touch switch, the second touch switch is a stop switch for the bottoming assembly 7 to bottom out. After the second touch switch is touched, the hydraulic telescopic rod 4 stops probing the underwater working box 3. The third spring 75 is used for elastic reset of the downward pressure head 71, and the fourth spring 76 is used for elastic reset of the second touch switch. Fig. 9 As shown, the cross section of the lower pressure head 71 is a trapezoidal structure, and the hydraulic telescopic rod 4, the first push rod 23, the second push rod 33 and the third push rod 62 in this embodiment are all hydraulic cylinders in the prior art.

[0082] A linear drive assembly 35 is arranged in the underwater operation box 3. The linear drive assembly 35 is a trackless cylinder or a linear motor in the prior art. A first nozzle 32, a second nozzle, a CCD camera and a pressure sensor are respectively installed on the execution end of the linear drive assembly 35. The first nozzle 32 is externally connected to a foaming device, and the second nozzle is externally connected to an air compressor. The second nozzle is used to spray heated compressed air into the structural groove 101. The heated compressed air forms an air knife, and cleans and dries the structural groove 101. After cleaning and drying, the first nozzle 32 is used to spray polyurethane foam glue or other sealing glue into the structural groove 101. The air pressure in the underwater operation box 3 is detected by a pressure sensor and the pressure is maintained for a certain period of time. The surface sealing glue is solid, and the state of the structural groove 101 can be observed by a CCD camera to ensure the construction quality. During the process, the first nozzle 32, the second nozzle, the CCD camera and the pressure sensor are driven by the linear drive component 35 to slide axially in the underwater operation box 3. In this embodiment, a sealed serial interface is arranged on the underwater operation box 3, and the signal line and the medium tube are connected to the external device through the sealed serial interface. The control method of this embodiment is controlled by a controller, and the control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field, and this article is mainly used to protect mechanical devices. The control method and circuit connection are not explained in detail in this article.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction method for a riverside steel sheet pile cofferdam, characterized in that: The riverside steel sheet pile cofferdam comprises two single-layer linear cofferdams (100), the two single-layer linear cofferdams (100) are arranged parallel to each other and opposite to each other, a filling gap (200) is arranged between the two single-layer linear cofferdams (100), and the two single-layer linear cofferdams (100) are connected by a support plate (300), a filler is filled in the filling gap (200), and an anti-corrosion layer is arranged on the side of the single-layer linear cofferdam (100) contacting the water body; Each single-layer linear cofferdam (100) comprises a plurality of steel sheet pile bodies (1) connected end to end, a sealing plug (400) is arranged between two adjacent steel sheet pile bodies (1), the sealing plug (400) is used to prevent water from seeping into the filling gap (200), and the sealing plug (400) is located on the side of the steel sheet pile body (1) contacting the water body, and one end of the support plate (300) is connected to the other side of the steel sheet pile body (1); The steel sheet pile body (1) comprises a supporting body (11), a first sealing plate (12) and a second sealing plate (13) are respectively arranged on both sides of the supporting body (11), the first sealing plate (12) and the second sealing plate (13) between two adjacent supporting bodies (11) are in contact with each other, and the contact between the first sealing plate (12) and the second sealing plate (13) is a rough sealing structure of the two adjacent supporting bodies (11); The supporting body (11) is a U-shaped structure, the open end of the U-shaped structure faces the filling gap (200), and the first sealing plate (12) and the second sealing plate (13) are respectively located on the outer walls of both sides of the open end; The cross section of the first sealing plate (12) is an L-shaped structure, and the cross section of the second sealing plate (13) is a J-shaped structure, and the L-shaped structure and the J-shaped structure are interlocked; The supporting body (11), the first sealing plate (12) and the second sealing plate (13) are an integral structure; A structural groove (101) is provided between two adjacent supporting bodies (11); a sealing plugging object (400) is filled in the structural groove (101) to form a supplementary sealing structure between the two supporting bodies (11); the cross section of the structural groove (101) is a trapezoidal structure; the first sealing plate (12) and the second sealing plate (13) abutting against each other are the short side bottom (102) of the trapezoidal structure; the long side bottom of the trapezoidal structure is close to the water body; and the cross section of the sealing plugging object (400) matches the cross section of the structural groove (101); the water body can press the sealing plugging object (400) into the structural groove (101); The construction method includes the following steps: S1, inserting the lower end of the steel sheet pile body (1) onto a hard foundation below the water body by static pressure piling; S2, stacking the steel sheet pile bodies (1) in sequence to form a single-layer linear cofferdam (100), and arranging two single-layer linear cofferdams (100) opposite to each other; S3, hoisting the underwater operation spraying device (500) by means of a lifting device, and filling the sealing plugging object (400) in the structural groove (101) between two adjacent steel sheet pile bodies (1); S4, setting a support plate (300) on the portion of the steel sheet pile that has been filled with the sealing plug (400) and exceeds the water body; S5, laying a deck on the support plate (300) to form a temporary construction road for the lifting equipment; S6, pumping water from the filling gap (200) between the two single-layer linear cofferdams (100) that have completed the sealing plugging operation (400), and setting up a support plate (300) as the water level drops; S7, filling the filling gap (200); The underwater operation spraying device (500) comprises a support frame (2) and an underwater operation box (3), wherein the support frame (2) and the underwater operation box (3) are arranged opposite to each other, and a hydraulic telescopic rod (4) is respectively arranged on the support frame (2) and the underwater operation box (3), and the upper ends of the hydraulic telescopic rod (4) are connected to the lifting equipment through a crossbeam (5), one side of the support frame (2) can abut against one side of the steel sheet pile body (1), one side of the underwater operation box (3) can be sealed and connected to the other side of the steel sheet pile body (1), and the underwater operation box (3) is provided with a water outlet pipe (31), and the water in the underwater operation box (3) can be discharged through the water outlet pipe (31), and a first spray head (32) is arranged in the underwater operation box (3), and the first spray head (32) is used to spray the sealing plugging material (400) into the structural groove (101); One side of the underwater working box (3) is connected to the execution end of the second push rod (33), and the second push rod (33) is connected to the execution end of the hydraulic telescopic rod (4). The other side of the underwater working box (3) is provided with an opening, and a sealing rubber pad (34) is provided on the outer edge of the opening. The second push rod (33) is used for the underwater working box (3) to be close to or away from the side of the steel sheet pile body (1), and the steel sheet pile body (1) is sealed and connected to the underwater working box (3) through the sealing rubber pad (34). A sliding sealing plate (6) is provided at each end of the underwater working box (3), and each sliding sealing plate (6) can be inserted into the structural groove (101), and the outer periphery of the sliding sealing plate (6) can be sealed and connected to the trapezoidal structure of the structural groove (101); A slide groove is provided at each end of the underwater operation box (3), and a sliding sealing plate (6) is provided in each slide groove. The cross section of the sliding sealing plate (6) is a trapezoidal structure. The outer contour size of the sliding sealing plate (6) is smaller than the inner circle contour size of the structural groove (101). An air bag (61) is provided on the periphery of the sliding sealing plate (6). An external inflation device can fill the air bag (61) with a compressed medium. The compressed medium is used for expanding the air bag (61). The expanded air bag (61) constitutes a sealing structure between the sliding sealing plate (6) and the structural groove (101).

2. The construction method of a riverside steel sheet pile cofferdam according to claim 1, characterized in that: The support plate (300) is connected to one side of the support body (11) through a support block (14); the cross section of the support block (14) is a trapezoidal structure; one end of the support plate (300) is mounted on the upper slope of the support block (14).

3. The construction method of a riverside steel sheet pile cofferdam according to claim 1, characterized in that: One end of the sliding blocking plate (6) is connected to the execution end of the third push rod (62) through a floating assembly, and the third push rod (62) is fixedly installed on the underwater operation box (3). The floating assembly includes a first support rod (63), a floating support rod (64), a second support rod (65) and a first touch switch. One end of the first support rod (63) is fixedly connected to the sliding blocking plate (6), and the other end of the first support rod (63) is installed with a floating support rod (64). One end of the floating support rod (64) is slidably connected to the inner ring of the second support rod (65), and one end of the second support rod (65) is fixedly connected to the execution end of the third push rod (62). A first spring (66) is arranged on the periphery of the floating support rod (64). The first spring (66) 6) are respectively fixedly connected to one end of the first support rod (63) and one end of the second support rod (65); a first baffle (67) is arranged on the inner circle of the second support rod (65); a first sliding hole is arranged in the middle of the first baffle (67); a first sliding rod (68) is slidably connected in the first sliding hole; a first touch switch is installed on one end of the first sliding rod (68); an execution end of the first touch switch can contact one end of the floating support rod (64); the other end of the first sliding rod (68) is threadedly connected to a first nut (69); a second spring (610) is arranged on the periphery of the first sliding rod (68); and the two ends of the second spring (610) are respectively fixedly connected to one end of the first nut (69) and one end of the first baffle (67).

4. The construction method of a riverside steel sheet pile cofferdam according to claim 1 is characterized in that: A bottoming assembly (7) is arranged below the underwater operation box (3), the bottoming assembly (7) comprising a downward pressure head (71), one end of which is provided with a third support rod (72), a second sliding hole is arranged on the underwater operation box (3), the periphery of the third support rod (72) is sealed and connected to the second sliding hole, and the periphery of the third support rod (72) can slide axially along the second sliding hole, a second baffle (73) is installed at one end of the third support rod (72), a third spring (75) is arranged at the periphery of the third support rod (72), and both ends of the third spring (75) are respectively fixedly connected to the underwater operation box (3). The side wall of the box (3) and one end of the second baffle (73), a third baffle (74) is arranged inside the underwater operation box (3), a third sliding hole is arranged on the third baffle (74), a second sliding rod is slidably connected in the third sliding hole, a second touch switch is installed at one end of the second sliding rod, one end of the second baffle (73) can contact the execution end of the second touch switch, a second nut is installed at the other end of the second sliding rod, a fourth spring (76) is arranged on the periphery of the second sliding rod, and two ends of the fourth spring (76) are respectively fixedly connected to one end of the second nut and one end of the third baffle (74); The cross section of the pressing head (71) is a trapezoidal structure.

5. The construction method of a riverside steel sheet pile cofferdam according to claim 1, characterized in that: A linear drive assembly (35) is arranged in the underwater operation box (3); a first nozzle (32), a second nozzle, a CCD camera and a pressure sensor are respectively installed on the execution end of the linear drive assembly (35); the second nozzle is used to spray compressed air into the structure groove (101); the compressed air is used to clean the structure groove (101); the first nozzle (32) is used to spray a sealing plugging material (400) into the cleaned structure groove (101); the CCD camera is used to observe the state of the structure groove (101); and the pressure sensor is used to detect the air pressure in the underwater operation box (3); An air injection pipe (37) and an air release pipe (36) are respectively arranged above the underwater operation box (3), a water outlet pipe (31) is arranged below the underwater operation box (3), and a pressure relief valve is installed on the air release pipe (36).

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