Inclined rock surface bearing platform steel sheet pile cofferdam combined reinforcing system and construction method

Abstract

The invention relates to an inclined rock surface bearing platform steel sheet pile cofferdam combined reinforcing system and a construction method. The construction method comprises the following steps that a cofferdam reinforcing mechanism is hoisted in a cofferdam structure; the telescopic assemblies are expanded through the electric hydraulic rods and drive the middle plates, the side plates, the side plates and the angle plates to synchronously move to abut against the inner side of the cofferdam structure; and the self-limiting type fixing pipe is hoisted and placed, hoisting equipment is dismounted, and the end of the self-limiting type fixing pipe is self-locked. The cofferdam reinforcing device has the beneficial effects that hoisting equipment can hoist steel pipes through the hoisting rings, the third sliding blocks are completely embedded into the third guide rails from top to bottom, the hoisting equipment and the hoisting rings are detached, the steel pipes can support the positions of side plates, angle plates, middle plates and side plates, stress supporting points are increased, and therefore the reinforcing stability of a cofferdam structure can be improved; and after the steel pipe is stabilized, the spring can drive the movable plate to reset, the bolt is inserted into the fixing opening, the position of the steel pipe can be locked at the moment, and the stability of the steel pipe can be kept.

Description

Technical Field

[0001] The invention belongs to the technical field of steel sheet pile cofferdam reinforcement, and particularly relates to a combined reinforcement system and construction method for a steel sheet pile cofferdam of a tilted rock surface cap. Background Technique

[0002] In projects such as bridges, ports, and water conservancy, the construction of caps often faces complex geological conditions, such as tilted rock surfaces, high water level differences, or highly permeable strata. Traditional cofferdam structures such as earth-rock cofferdams and concrete cofferdams are prone to problems such as poor sealing and insufficient anti-slip ability on tilted rock foundations, resulting in leakage, structural instability, and even collapse. Steel sheet pile cofferdams have become the mainstream solution due to their high strength, rapid construction, and reusability.

[0003] For some low-pile caps, in order to reinforce the steel sheet pile cofferdam, multiple internal supports need to be set up for the steel sheet pile cofferdam. As the main support structure inside the steel sheet pile cofferdam, the internal support can withstand the earth pressure, water pressure, and hydrodynamic pressure under tidal action inside the cofferdam, thereby ensuring the overall stability and safety of the cofferdam structure. And under tidal conditions, the change of water flow impact and hydrodynamic pressure is likely to cause the deformation of the cofferdam structure. The internal support can reduce the deformation of the steel sheet piles by providing effective constraints, preventing water leakage or instability of the cofferdam;

[0004] However, the common internal support structures in the prior art generally only simply fix the spiral welded pipe by welding to achieve the internal support of the steel sheet pile cofferdam. The structure is simple, and there are obvious deficiencies not only in terms of support stability but also in support uniformity. More critically, these structures usually lack a special fixing mechanism that is convenient for installation and disassembly, resulting in a cumbersome installation and disassembly process. This not only greatly increases the difficulty of installation and maintenance but also prolongs the time cycle of foundation operations, and significantly increases the operation risk during high tide operations. Therefore, it is of great significance to study a new combined reinforcement system and construction method for a steel sheet pile cofferdam of a tilted rock surface cap to solve the above problems. Summary of the Invention

[0005] The purpose of the invention is to overcome the deficiencies in the prior art and provide a combined reinforcement system and construction method for a steel sheet pile cofferdam of a tilted rock surface cap.

[0006] Such a combined reinforcement system for a steel sheet pile cofferdam of a tilted rock surface cap includes a cofferdam structure, and a cofferdam reinforcement mechanism is internally supported in the cofferdam structure;

[0007] The cofferdam reinforcement mechanism includes an intermediate plate, side plates, corner plates and edge plates. The corner plates are arranged at the four corners of the cofferdam reinforcement mechanism, the intermediate plate is arranged at the center of the long side of the cofferdam reinforcement mechanism, the edge plates are arranged at the center of the short side of the cofferdam reinforcement mechanism, and the side plates are arranged between the intermediate plate and the corner plates; there are cross arms slidably hinged between adjacent plates on the perimeter of the cofferdam reinforcement mechanism, and sliding openings are provided on the sides of adjacent plates; one end of the cross arm is hinged to the top of the adjacent plate, and the other end is slidably connected to the sliding opening; the intermediate pile is located in the middle of the cofferdam reinforcement mechanism; telescopic components are assembled between the intermediate pile and the intermediate plate, and between the intermediate pile and the edge plate, and the telescopic components are connected to be driven by an electric hydraulic rod; self-limiting fixed pipes are assembled between the edge plate and the side plate, and between the side plate and the intermediate pile.

[0008] Preferably, the cross arms include a second cross arm, a fourth cross arm and a fifth cross arm. A set of first sliding openings are provided on both sides of the intermediate plate and the side plates. The top end of the second cross arm is hinged to the top ends of the intermediate plate and the side plates, and the bottom end is slidably connected in the two sets of first sliding openings; a set of third sliding openings are provided on both sides of the corner plate and the side plates. The top end of the fourth cross arm is hinged to the top ends of the corner plate and the side plates, and the bottom end is respectively slidably connected in the two sets of third sliding openings; a set of fourth sliding openings are provided on both sides of the edge plate and the corner plate. The top end of the fifth cross arm is hinged to the top ends of the edge plate and the corner plate, and the bottom end slides in the two sets of fourth sliding openings respectively.

[0009] Preferably, a first telescopic component is assembled between the two sides of the intermediate pile and the intermediate plate. The first telescopic component is connected to a first electric hydraulic rod. The first telescopic component includes two first guide rails and a first cross arm. The two first guide rails are respectively fixed on the opposite surfaces of the intermediate plate and the intermediate pile. A first slider slides on the first guide rail. The first sliders are respectively hinged to the first cross arm. The top end of the first cross arm is hinged to the first guide rail. The bottom end of the first guide rail is fixed to the bottom end of the first electric hydraulic rod. The first electric hydraulic rod is fixed on the first slider.

[0010] Preferably, a second telescopic component is assembled between the intermediate pile and the edge plate. The second telescopic component includes a second guide rail, a second electric hydraulic rod, a movable frame and a telescopic frame. The second guide rails are respectively fixed on the intermediate pile, the movable frame and the edge plate. The upper ends of the second guide rails are respectively hinged to the upper ends of the telescopic frame. A second slider is slidably connected to the second guide rail. The second slider is hinged to the lower end of the telescopic frame. The telescopic frame is hinged with a connecting piece and a fixing piece; the second electric hydraulic rod is fixed between the connecting piece and the fixing piece; the movable frame is sleeved on the middle part of the telescopic frame, and a ring buckle is fixed above the movable frame.

[0011] Preferably, the cross arm includes a third cross arm, and the sliding opening includes a second sliding opening; the third cross arms are hinged to both sides of the movable frame perpendicular to the length direction of the second telescopic assembly, the other ends of the third cross arms are hinged to the side plates, and two groups of second sliding openings are provided in the middle of both sides of the movable frame and the side plates, and both ends of the third cross arms are slidably connected in the two groups of second sliding openings.

[0012] Preferably, the self-limiting fixed pipe includes a third guide rail and a steel pipe; the third guide rails are respectively fixed on the middle pile, the side plate and the edge plate, the third guide rail is provided with a fixing opening, a third slider is slidably connected on the third guide rail, and the end of the steel pipe is fixed on the third guide rail through the third slider.

[0013] Preferably, the self-limiting fixed pipe includes a movable plate disposed inside the steel pipe; two ring seats are installed on the steel pipe, a lifting ring is slidably disposed inside the ring seat, cavities are respectively provided at both ends of the steel pipe for installing the movable plate, an inclined opening is provided in the movable plate, and the bottom end of the lifting ring is slidably connected in the inclined opening in the movable plate; a bolt is fixed on one side of the movable plate, the bolt passes through the steel pipe and the third slider, a fixing opening is provided on the third guide rail, and the sizes of the end face of the bolt and the fixing opening are adapted to each other; a telescopic rod is fixed on the side of the movable plate away from the bolt, a spring is sleeved on the telescopic rod, and one ends of the telescopic rod and the spring are fixed on the inner wall of the cavity of the steel pipe.

[0014] The construction method of this combined reinforcement system for the cofferdam of the inclined rock surface bearing platform steel sheet pile includes the following steps:

[0015] Step 1: After vertically inserting the cofferdam structure into the construction position, hoist the cofferdam reinforcement mechanism into the cofferdam structure.

[0016] Step 2: Extend the telescopic assembly through the electric hydraulic rod and drive the middle plate, the edge plate, the side plate and the corner plate to move synchronously until they abut against the inner side of the cofferdam structure.

[0017] Step 3: Hoist the self-limiting fixed pipe and place the self-limiting fixed pipe between the edge plate and the side plate, and between the side plate and the middle pile.

[0018] Step 4: Remove the hoisting equipment, and the end of the self-limiting fixed pipe is self-locked.

[0019] Preferably, the self-limiting fixed pipe includes a third guide rail, a steel pipe and a movable plate; the third guide rail is fixed to the middle pile, the side plate and the edge plate respectively, the third guide rail is provided with a fixing opening, a third slider is slidably connected to the third guide rail, and the movable plate is arranged inside the steel pipe; two ring seats are installed on the steel pipe, a lifting ring is slidably arranged inside the ring seat, cavities are respectively arranged at both ends of the steel pipe for installing the movable plate, an inclined opening is formed in the movable plate, and the bottom end of the lifting ring is slidably connected to the inclined opening in the movable plate; a bolt is fixed to one side of the movable plate, and the bolt passes through the steel pipe and the third slider; a telescopic rod is fixed to the side of the movable plate away from the bolt, a spring is sleeved on the telescopic rod, and one ends of the telescopic rod and the spring are fixed to the inner wall of the cavity of the steel pipe.

[0020] Preferably, a fixing opening is formed in the third guide rail, and the size of the end face of the bolt is adapted to the size of the fixing opening; in step three, the self-limiting fixed pipe is lifted by the lifting ring, so that the movable plate drives the bolt to retract into the third slider, and the retraction of the bolt of the self-limiting fixed pipe causes the spring to deform. After adjusting the position of the self-limiting fixed pipe so that the third slider slides to the position of the fixing opening of the third guide rail, the hoisting equipment is removed, and the bolt is inserted into the fixing opening by the restoring force of the spring to lock the position of the self-limiting fixed pipe.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1) The combined reinforcement system of the inclined rock surface caisson steel sheet pile cofferdam proposed by the present invention can directly hoist the cofferdam reinforcement mechanism into the internal space of the cofferdam structure through the hoisting equipment, and then through the expansion of the first telescopic component and the second telescopic component, the second cross arm, the third cross arm, the fourth cross arm and the fifth cross arm follow to expand, and then the middle plate, the side plate, the corner plate and the edge plate synchronously expand outwards. After expansion, they can smoothly abut against the inner side of the cofferdam structure, so as to play a role in reinforcing the cofferdam structure, prevent the problem of deformation of the cofferdam structure under external pressure, and at the same time adopt a structural method, which can quickly realize the reinforcement of the cofferdam structure, reduce the operation difficulty, and shorten the construction period, thereby reducing the risk of high tide operation.

[0023] 2) After the combined reinforcement system of the inclined rock surface caisson steel sheet pile cofferdam proposed by the present invention abuts the middle plate, the side plate, the edge plate and the corner plate against the inner side of the cofferdam structure, at this time, the hoisting equipment can hoist the steel pipe through the lifting ring, so that the third slider is completely embedded into the third guide rail from top to bottom. At this time, the hoisting equipment and the lifting ring are removed, so that the steel pipe can brace the positions of the edge plate, the corner plate, the middle plate and the side plate, increase the force-bearing support points, thereby improving the reinforcement stability of the cofferdam structure. After the steel pipe is stable, the spring can drive the movable plate to complete the reset, so that the bolt is inserted into the fixing opening. At this time, the position of the steel pipe can be locked, so as to maintain the stability of the steel pipe. Moreover, by adopting a self-locking method, the construction process can be effectively accelerated, and the reinforcement construction operation of the cofferdam structure is more convenient.

[0024] 3) The combined reinforcement system of the inclined rock surface caisson steel sheet pile cofferdam proposed by the present invention is deployed through the first telescopic component and the second telescopic component, so that the second cross arm, the third cross arm, the fourth cross arm and the fifth cross arm follow to be deployed, enabling the middle plate, the side plate, the corner plate and the edge plate to smoothly abut against the periphery of the well-constructed cofferdam structure. Then, the steel pipes are hoisted and installed. After installation, the steel pipes, the second cross arm, the third cross arm, the fourth cross arm and the fifth cross arm cooperate with each other to form a well-proportioned and tightly structured support network, thereby providing all-round and multi-angle reinforcement support for the cofferdam. And through the oblique setting of the steel pipes and the staggered design between the structures, multiple triangular structures can be formed, thus forming a firm and flexible support network, improving the overall bearing capacity and strength. Secondly, under the push of the second cross arm, the third cross arm, the fourth cross arm and the fifth cross arm, the middle plate, the side plate, the corner plate and the edge plate quickly unfold and fit against the inner side of the cofferdam structure. This design not only improves the construction efficiency but also ensures the tight fit and stability between the cofferdam reinforcement mechanism and the cofferdam structure. Description of the Drawings

[0025] Figure 1 is a three-dimensional structural schematic diagram of the combined reinforcement system of the inclined rock surface caisson steel sheet pile cofferdam;

[0026] Figure 2 is a three-dimensional structural schematic diagram of the cofferdam reinforcement mechanism in the combined reinforcement system of the inclined rock surface caisson steel sheet pile cofferdam;

[0027] Figure 3 is a three-dimensional structural schematic diagram of the first telescopic component in the combined reinforcement system of the inclined rock surface caisson steel sheet pile cofferdam;

[0028] Figure 4 is a three-dimensional structural schematic diagram of the second telescopic component in the combined reinforcement system of the inclined rock surface caisson steel sheet pile cofferdam;

[0029] Figure 5 is a three-dimensional sectional structural schematic diagram of the second telescopic component in the combined reinforcement system of the inclined rock surface caisson steel sheet pile cofferdam;

[0030] Figure 6 is a three-dimensional structural schematic diagram of the self-limiting fixed pipe in the combined reinforcement system of the inclined rock surface caisson steel sheet pile cofferdam;

[0031] Figure 7 is a structural schematic diagram of the separation of the first guide rail and the first slider in the combined reinforcement system of the inclined rock surface caisson steel sheet pile cofferdam;

[0032] Figure 8 is in the combined reinforcement system of the inclined rock surface caisson steel sheet pile cofferdam Figure 7 enlarged structural schematic diagram at position A;

[0033] Figure 9 It is a structural schematic diagram of the three-dimensional section of the self-limiting fixed pipe in the combined reinforcement system of the steel sheet pile cofferdam for the inclined rock surface cap;

[0034] Figure 10 It is a structural schematic diagram of the connection between the lifting ring and the inclined opening in the combined reinforcement system of the steel sheet pile cofferdam for the inclined rock surface cap;

[0035] Figure 11 It is a three-dimensional structural schematic diagram of the lifting ring in the combined reinforcement system of the steel sheet pile cofferdam for the inclined rock surface cap.

[0036] Explanation of reference numerals: 100, cofferdam structure; 200, cofferdam reinforcement mechanism; 201, intermediate pile; 202, first telescopic assembly; 2021, first guide rail; 2022, first slider; 2023, first cross arm; 2024, first electro-hydraulic rod; 203, intermediate plate; 204, side plate; 205, corner plate; 206, self-limiting fixed pipe; 2061, steel pipe; 2062, third guide rail; 2063, lifting ring; 2064, third slider; 2065, fixed opening; 2066, bolt; 2067, movable plate; 2068, telescopic rod; 2069, spring; 20610, ring seat; 20611, inclined opening; 207, second cross arm; 208, second telescopic assembly; 2081, telescopic frame; 2082, fixing piece; 2083, connecting piece; 2084, second electro-hydraulic rod; 2085, second guide rail; 2086, second slider; 2087, ring buckle; 2088, third cross arm; 2089, second sliding opening; 20810, movable frame; 209, third sliding opening; 210, side plate; 211, fourth cross arm; 212, fifth cross arm; 213, fourth sliding opening; 214, first sliding opening. Detailed implementation manners

[0037] The present invention will be further described below in conjunction with embodiments. The description of the following embodiments is only for helping to understand the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0038] Embodiment 1

[0039] As an embodiment, as Figures 1 to 11 shown, this combined reinforcement system of the steel sheet pile cofferdam for the inclined rock surface cap includes a cofferdam structure 100, and a cofferdam reinforcement mechanism 200 is arranged inside the cofferdam structure 100;

[0040] The cofferdam reinforcement mechanism 200 includes an intermediate pile 201, two intermediate plates 203, four side plates 204, four corner plates 205 and two side plates 210. The intermediate pile 201 is located in the middle of the space formed by enclosing the four side plates 204, two intermediate plates 203, four corner plates 205 and two side plates 210. A set of first sliding openings 214 are provided on both sides of the intermediate plate 203 and the side plates 204. The two ends of the second cross arm 207 are slidably connected in the two sets of first sliding openings 214. The first sliding openings 214 can play a guiding role for the second cross arm 207, enabling the second cross arm 207 to smoothly perform telescopic movement. The number of each set of first sliding openings 214 is two. A set of third sliding openings 209 are provided between each corner plate 205 and the side plate 204. The two ends of the fourth cross arm 211 are respectively slidably connected in the two sets of third sliding openings 209. The number of each set of third sliding openings 209 is two. The two ends of the fourth cross arm 211 can perform longitudinal sliding in the third sliding openings 209, enabling the fourth cross arm 211 to smoothly complete telescopic movement. A set of fourth sliding openings 213 are provided between the side plate 210 and the corner plate 205. The two ends of the fifth cross arm 212 are respectively slidably connected in the two sets of fourth sliding openings 213. The number of each set of fourth sliding openings 213 is two. The fourth sliding openings 213 can guide the two ends of the fifth cross arm 212, enabling the fifth cross arm 212 to smoothly perform telescopic movement. A first telescopic assembly 202 is assembled between both sides of the intermediate pile 201 and the two intermediate plates 203. The first telescopic assembly 202 includes two first guide rails 2021. The two first guide rails 2021 are respectively fixed between the intermediate plate 203 and the intermediate pile 201. A first slider 2022 slides on the first guide rail 2021. The first guide rail 2021 can guide the first slider 2022, enabling the first slider 2022 to smoothly slide up and down along the first guide rail 2021, so that the first cross arm 2023 can smoothly perform telescopic movement. The two first sliders 2022 are hinged to the two first cross arms 2023. The first cross arm 2023 is also hinged above the first guide rail 2021. The lower part of the first guide rail 2021 is fixed to one end of the first electro-hydraulic rod 2024, and the first electro-hydraulic rod 2024 is also fixed to the first slider 2022. The first electro-hydraulic rod 2024 can drive the first cross arm 2023 to perform telescopic movement, and further can adjust the outward expansion of the intermediate plate 203. And a second telescopic assembly 208 is assembled between the intermediate pile 201 and the two side plates 210. The second telescopic assembly 208 includes three second guide rails 2085. The three second guide rails 2085 are respectively fixed on the intermediate pile 201, the movable frame 20810 and the side plate 210. The upper parts of the three second guide rails 2085 are hinged to the three end parts of the telescopic frame 2081. And a second slider 2086 slides on the second guide rail 2085. The second slider 2086 can smoothly slide on the second guide rail 2085, enabling the telescopic frame 2081 to smoothly perform telescopic movement. The three second sliders 2086 are hinged to the telescopic frame 2081.The telescopic frame 2081 is hinged to the connecting member 2083 and the fixing member 2082. A second electro-hydraulic rod 2084 is fixed between the connecting member 2083 and the fixing member 2082. The second electro-hydraulic rod 2084 can be used as a power driving source, so as to drive the telescopic frame 2081 to expand and contract, enabling the telescopic frame 2081 to drive the side plate 210 to extend outward, facilitating the subsequent rapid reinforcement and support of the cofferdam structure 100. Both sides of the movable frame 20810 are hinged with third cross arms 2088. The third cross arms 2088 can be smoothly extended and contracted through the second sliding openings 2089, and then can drive the side plates 204 to extend outward. The third cross arms 2088 are hinged to the side plates 204. A group of second sliding openings 2089 are provided in both sides of the movable frame 20810 and the middle part of the side plates 204. The two ends of the third cross arms 2088 slide in the two second sliding openings 2089. The number of each second sliding opening 2089 is two. Two buckle rings 2087 are fixed above the movable frame 20810. The buckle rings 2087 can provide lifting points, so as to smoothly lift the cofferdam reinforcement mechanism 200 for construction operations. The second telescopic assembly 208 is also connected to the two side plates 204.,

[0041] As Figure 2 shown, self-limiting fixed pipes 206 are assembled between the side plate 210 and the two side plates 204, and between the two side plates 204 and the middle pile 201.

[0042] As Figure 3 shown, both sides of the middle plate 203 are respectively hinged to the two second cross arms 207. The second cross arms 207 are also hinged to the side plates 204. The side plates 204 and the corner plates 205 are respectively hinged to the two fourth cross arms 211. Through the arrangement of the second cross arms 207, third cross arms 2088, fourth cross arms 211 and fifth cross arms 212, when the side plate 210 and the middle plate 203 extend outward, a linkage effect can be smoothly achieved, so that the side plates 204 and the corner plates 205 can be unfolded outward. Both sides of the side plate 210 are respectively hinged to the two fifth cross arms 212. One end of the fifth cross arm 212 is also hinged to one side of the corner plate 205.

[0043] In this embodiment, the cofferdam reinforcement mechanism 200 can be directly hoisted into the internal space of the cofferdam structure 100 by a hoisting device. Then, by controlling the operation of the first electro-hydraulic rod 2024 and the second electro-hydraulic rod 2084, the first cross arm 2023 and the telescopic frame 2081 are unfolded, and the second cross arm 207, the third cross arm 2088, the fourth cross arm 211, and the fifth cross arm 212 follow to unfold. As a result, the intermediate plate 203, the side plate 204, the corner plate 205, and the side plate 210 are synchronously extended outward and can smoothly abut against the inner side of the cofferdam structure 100, thereby playing a role in reinforcing the cofferdam structure 100, preventing the problem of deformation of the cofferdam structure 100 under external pressure. At the same time, by adopting a structural method, the reinforcement of the cofferdam structure 100 can be quickly realized, the operation difficulty can be reduced, and the construction period can be shortened, thereby reducing the risk of high-tide operation.

[0044] Embodiment 2

[0045] As another embodiment, this Embodiment 2 is proposed based on Embodiment 1, and a more specific combined reinforcement system for a steel sheet pile cofferdam on an inclined rock surface is as Figures 6 to 11 shown:

[0046] As Figure 6 shown, the self-limiting fixed pipe 206 includes two third guide rails 2062. Four of the third guide rails 2062 are fixed on the intermediate pile 201, and the remaining two third guide rails 2062 are respectively fixed on the side plate 204 and the side plate 210. A fixing port 2065 is provided on the third guide rail 2062, and a third slider 2064 slides on the third guide rail 2062. By embedding the third slider 2064 into the third guide rail 2062, a limiting effect can be achieved to maintain the stability of the steel pipe 2061 and prevent the steel pipe 2061 from falling off.

[0047] As Figures 9 to 11As shown in the figure, cavities are respectively provided at both ends of the steel pipe 2061 for installing the movable plate 2067. The steel pipe 2061 is fixed between two third sliders 2064. Two ring seats 20610 are installed on the steel pipe 2061. A lifting ring 2063 is slidably arranged inside the ring seat 20610. The lifting ring 2063 can provide a lifting point, so that the steel pipe 2061 can be smoothly lifted, which is convenient for the hoisting construction operation of the steel pipe 2061. The lower part of the lifting ring 2063 is arranged in the inclined opening 20611. Due to the inclined setting of the inclined opening 20611, when the lifting ring 2063 is stressed upward for lifting, the movable plate 2067 can be driven to move through the inclined opening 20611, so that the movable plate 2067 drives the bolt 2066 to retract smoothly. At the same time, the movable plate 2067 can drive the spring 2069 to deform to store elastic potential energy. The inclined opening 20611 is opened on the movable plate 2067, and a bolt 2066 is fixed on one side of the movable plate 2067. The bolt 2066 passes through the steel pipe 2061 and the third slider 2064, and the size of the bolt 2066 is adapted to the size of the fixing opening 2065. A telescopic rod 2068 and a spring 2069 are fixed on the other side of the movable plate 2067. When the lifting ring 2063 is removed from the hoisting equipment, the spring 2069 can drive the movable plate 2067 to reset, and then the bolt 2066 is inserted into the fixing opening 2065 to lock the position of the steel pipe 2061. One ends of the telescopic rod 2068 and the spring 2069 are fixed on the inner wall of the cavity of the steel pipe 2061.

[0048] In this embodiment: After the middle plate 203, the side plate 204, the edge plate 210 and the corner plate 205 are abutted against the inner side of the cofferdam structure 100, the hoisting equipment can lift the steel pipe 2061 through the lifting ring 2063 at this time, so that the third slider 2064 is completely embedded in the third guide rail 2062 from top to bottom. At this time, the hoisting equipment and the lifting ring 2063 are removed, so that the steel pipe 2061 can brace the positions of the edge plate 210, the corner plate 205, the middle plate 203 and the side plate 204, increasing the force-bearing support points, thereby improving the reinforcement stability of the cofferdam structure 100. And after the steel pipe 2061 is stable, the spring 2069 can drive the movable plate 2067 to complete the reset, so that the bolt 2066 is inserted into the fixing opening 2065. At this time, the position of the steel pipe 2061 can be locked, thereby maintaining the stability of the steel pipe 2061. Moreover, by adopting a self-locking method, the construction process can be effectively accelerated, making the reinforcement construction operation of the cofferdam structure 100 more convenient.

[0049] It should be noted that the same or similar parts in this embodiment and Embodiment 1 can be referred to each other and will not be repeated in this application.

[0050] Embodiment 3

[0051] As another embodiment, this Embodiment 3 is proposed on the basis of Embodiment 2, a more specific combined reinforcement system for a steel sheet pile cofferdam with an inclined rock surface cap:

[0052] As Figures 1 to 5 shown, the cofferdam reinforcement mechanism 200 includes an intermediate pile 201, two intermediate plates 203, two side plates 204, four corner plates 205 and two side plates 210. The intermediate pile 201 is located in the middle of the space formed by enclosing the two side plates 204, two intermediate plates 203, four corner plates 205 and two side plates 210. A first telescopic assembly 202 is assembled between both sides of the intermediate pile 201 and the two intermediate plates 203. A second telescopic assembly 208 is assembled between the intermediate pile 201 and the two side plates 210. The second telescopic assembly 208 is also connected to the two side plates 204.

[0053] Self-limiting fixed pipes 206 are assembled between the side plates 210 and the two side plates 204 and between the two side plates 204 and the intermediate pile 201.

[0054] Both sides of the intermediate plate 203 are respectively hinged to two second cross arms 207. The second cross arms 207 are also hinged to the side plates 204. Both sides of the side plates 204 and the corner plates 205 are respectively hinged to two fourth cross arms 211. Both sides of the side plates 210 are respectively hinged to two fifth cross arms 212. One end of the fifth cross arm 212 is also hinged to one side of the corner plate 205.

[0055] In this embodiment: By the expansion of the first telescopic assembly 202 and the second telescopic assembly 208, the second cross arms 207, third cross arms 2088, fourth cross arms 211 and fifth cross arms 212 follow to expand, so that the intermediate plates 203, side plates 204, corner plates 205 and side plates 210 can smoothly abut against the periphery of the cofferdam structure 100. Then, the steel pipe 2061 is hoisted and installed. After installation, the steel pipe 2061, second cross arms 207, third cross arms 2088, fourth cross arms 211 and fifth cross arms 212 cooperate with each other to form a well - arranged and tightly - structured support network, thereby providing all - around and multi - angle reinforcement support for the cofferdam. And by the oblique setting of the steel pipe 2061 and the staggered design between the structures, multiple triangular structures can be formed, thus forming a support network that is both firm and flexible, improving the overall bearing capacity and strength. Secondly, the intermediate plates 203, side plates 204, corner plates 205 and side plates 210 are quickly expanded and attached to the inner side of the cofferdam structure 100 under the push of the second cross arms 207, third cross arms 2088, fourth cross arms 211 and fifth cross arms 212. This design not only improves the construction efficiency but also ensures the tight fit and stability between the cofferdam reinforcement mechanism 200 and the cofferdam structure 100.

[0056] It should be noted that the same or similar parts in this embodiment and Embodiment 2 can be referred to each other and will not be elaborated in this application.

[0057] Embodiment 4

[0058] As another embodiment, on the basis of the third embodiment, this fourth embodiment proposes a construction method for the combined reinforcement system of the inclined rock surface bearing platform steel sheet pile cofferdam, including the following steps:

[0059] S1. First, vertically insert the cofferdam structure 100 into the construction position. After the cofferdam structure 100 is inserted, a construction space is formed. At this time, cooperate with the sling 2087 through the hoisting equipment to hoist the cofferdam reinforcement mechanism 200 into the construction space;

[0060] S2. After the cofferdam reinforcement mechanism 200 is hoisted, operate the first electro-hydraulic rod 2024 and the second electro-hydraulic rod 2084 to extend the first cross arm 2023 and the telescopic frame 2081 respectively. The first cross arm 2023 drives the middle plate 203 to move, and the telescopic frame 2081 drives the side plate 210 to move. Due to the movement of the middle plate 203 and the side plate 210, the third cross arm 2088, the fourth cross arm 211 and the fifth cross arm 212 follow and extend, and then the corner plate 205 and the side plate 204 follow and extend outwards, so that the middle plate 203, the side plate 210, the side plate 204 and the corner plate 205 can move synchronously and abut against the inner side of the cofferdam structure 100 to keep the cofferdam structure 100 stable;

[0061] S3. Then, cooperate with the lifting ring 2063 through the hoisting equipment to lift the steel pipe 2061, so that the force on the lifting ring 2063 can exert a force on the movable plate 2067 through the inclined opening 20611, so that the movable plate 2067 drives the pin 2066 to retract into the third slider 2064. At the same time, the movable plate 2067 drives the spring 2069 to deform. When the third slider 2064 corresponds to the third guide rail 2062 and slides down into the third guide rail 2062, the pin 2066 corresponds to the fixed opening 2065.

[0062] S4. Remove the connection between the hoisting equipment and the lifting ring 2063. At this time, drive the movable plate 2067 to move by the restoring force of the spring 2069, so that the pin 2066 is inserted into the fixed opening 2065 to lock the position of the steel pipe 2061, and install the remaining steel pipes 2061 in this installation method in turn. After the installation is completed, the cofferdam structure 100 is further strengthened.

[0063] It should be noted that the same or similar parts in this embodiment and the third embodiment can be referred to each other and will not be elaborated in this application.

[0064] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

Claims

1. A steel sheet pile cofferdam combined reinforcement system for an inclined rock surface cap, characterized by: It includes a cofferdam structure, and the internal support of the cofferdam structure has a cofferdam reinforcement mechanism; The cofferdam reinforcement mechanism includes an intermediate plate, a side plate, an angle plate and a side plate. The angle plates are arranged at the four corners of the cofferdam reinforcement mechanism, the intermediate plate is arranged at the center of the long side of the cofferdam reinforcement mechanism, the side plate is arranged at the center of the short side of the cofferdam reinforcement mechanism, and the side plate is arranged between the intermediate plate and the angle plate; cross arms are slidably hinged between adjacent plates on the perimeter of the cofferdam reinforcement mechanism, and sliding openings are opened on the sides of adjacent plates; one end of the cross arm is hinged to the top of the adjacent plate, and the other end is slidably connected to the sliding opening; the intermediate pile is located in the middle of the cofferdam reinforcement mechanism; telescopic components are installed between the intermediate pile and the intermediate plate, and between the intermediate pile and the side plate, and the telescopic components are connected to an electric hydraulic rod drive; self-limiting fixed pipes are installed between the side plate and the side plate, and between the side plate and the intermediate pile.

2. The inclined rock face cap steel sheet pile cofferdam combined reinforcement system according to claim 1, characterized in that: The cross arm includes a second cross arm, a fourth cross arm and a fifth cross arm, and a group of first sliding openings are opened on both sides of the middle panel and the side panel, the top end of the second cross arm is hinged at the top end of the middle panel and the side panel, and the bottom end is slidably connected in the two groups of first sliding openings; a group of third sliding openings are opened on both sides of the angle panel and the side panel, the top end of the fourth cross arm is hinged at the top end of the angle panel and the side panel, and the bottom end is slidably connected in the two groups of third sliding openings respectively; a group of fourth sliding openings are opened on both sides of the side panel and the angle panel, the top end of the fifth cross arm is hinged at the top end of the side panel and the angle panel, and the bottom end slides in the two groups of fourth sliding openings respectively.

3. The inclined rock face cap steel sheet pile cofferdam combined reinforcement system according to claim 1, characterized in that: A first telescopic assembly is installed between the two sides of the middle pile and the middle plate, and the first telescopic assembly is connected to a first electric hydraulic rod. The first telescopic assembly includes two first guide rails and a first cross arm. The two first guide rails are respectively fixed on the opposite surfaces of the middle plate and the middle pile. A first slider slides on the first guide rail, and the first slider is hinged to the first cross arm respectively. The first cross arm is hinged to the top end of the first guide rail, and the bottom end of the first guide rail is fixed to the bottom end of the first electric hydraulic rod, and the first electric hydraulic rod is fixed on the first slider.

4. The inclined rock face cap steel sheet pile cofferdam combined reinforcement system according to claim 1, characterized in that: A second telescopic assembly is installed between the middle pile and the side plate, and the second telescopic assembly includes a second guide rail, a second electric hydraulic rod, a movable frame and a telescopic frame. The second guide rail is respectively fixed on the middle pile, the movable frame and the side plate, and the upper ends of the second guide rails are respectively hinged to the upper ends of the telescopic frames. A second slider is slidably connected to the second guide rail, and the second slider is hinged to the lower end of the telescopic frame. The telescopic frame is hinged with a connecting piece and a fixing piece; the second electric hydraulic rod is fixed between the connecting piece and the fixing piece; the movable frame is sleeved in the middle part of the telescopic frame, and a buckle is fixed on the top of the movable frame.

5. The inclined rock face cap steel sheet pile cofferdam combined reinforcement system according to claim 4, characterized in that: The cross arm includes a third cross arm, and the slide includes a second slide; the movable frame is hinged with a third cross arm on both sides perpendicular to the length direction of the second telescopic component, and the other end of the third cross arm is hinged on the side panel, and two groups of second slides are opened on both sides of the movable frame and the middle of the side panel, and the two ends of the third cross arm are slidably connected in the two groups of second slides.

6. The inclined rock face cap steel sheet pile cofferdam combined reinforcement system according to claim 1, characterized in that: The self-limiting fixed pipe includes a third guide rail and a steel pipe; the third guide rail is fixed on the middle pile, the side plate and the side plate respectively, the third guide rail is provided with a fixing opening, the third guide rail is slidably connected with a third slider, and the end of the steel pipe is fixed on the third guide rail through the third slider.

7. The inclined rock face cap steel sheet pile cofferdam combined reinforcement system according to claim 6, characterized in that: The self-limiting fixed tube includes a movable plate, which is arranged inside a steel tube; two ring seats are installed on the steel tube, and a lifting ring is slidably provided inside the ring seats. A cavity is respectively provided at both ends of the steel tube for installing the movable plate, and an oblique opening is provided in the movable plate, and the bottom end of the lifting ring is slidably connected to the oblique opening in the movable plate; a latch is fixed on one side of the movable plate, and the latch passes through the steel tube and the third slider, and a fixed opening is provided on the third guide rail, and the size of the end face of the latch is matched with the size of the fixed opening; a telescopic rod is fixed on the side of the movable plate away from the latch, and a spring is sleeved on the telescopic rod, and one end of the telescopic rod and the spring is fixed on the inner wall of the steel tube cavity.

8. The construction method of the inclined rock face cap steel sheet pile cofferdam combined reinforcement system according to claim 1, characterized in that: The steps include: Step 1: After the cofferdam structure is vertically inserted into the construction position, the cofferdam reinforcement mechanism is hoisted into the cofferdam structure; Step 2: The telescopic assembly is extended by an electric hydraulic rod and drives the middle plate, the side plate, the side plate and the corner plate to move synchronously to the inner side of the cofferdam structure; Step 3: Lift the self-limiting fixed pipe and place it between the side plate and the side plate, and between the side plate and the middle pile; Step 4: Remove the lifting equipment and lock the end of the self-limiting fixed pipe.

9. The construction method of the inclined rock surface cap steel sheet pile cofferdam combined reinforcement system according to claim 8 is characterized in that: The self-limiting fixed tube comprises a third guide rail, a steel tube and a movable plate; the third guide rail is respectively fixed on the middle pile, the side plate and the side plate, the third guide rail is provided with a fixed opening, the third guide rail is slidably connected with a third slider, and the movable plate is arranged inside the steel tube; two ring seats are installed on the steel tube, and a lifting ring is slidably provided inside the ring seat, and a cavity is respectively provided at both ends of the steel tube for installing the movable plate, an oblique opening is opened in the movable plate, and the bottom end of the lifting ring is slidably connected to the oblique opening in the movable plate; a latch is fixed on one side of the movable plate, and the latch passes through the steel tube and the third slider; a telescopic rod is fixed on the side of the movable plate away from the latch, and a spring is sleeved on the telescopic rod, and one end of the telescopic rod and the spring is fixed on the inner wall of the steel tube cavity.

10. The construction method of the inclined rock surface cap steel sheet pile cofferdam combined reinforcement system according to claim 9, characterized in that: A fixing opening is provided on the third guide rail, and the size of the end face of the latch pin matches the size of the fixing opening. In step three, the self-limiting fixing tube is lifted by the lifting ring, so that the movable plate drives the latch pin to retract and enter the third slider. The retraction of the latch pin of the self-limiting fixing tube causes the spring to deform. After the position of the self-limiting fixing tube is adjusted to make the third slider slide to the position of the fixing opening of the third guide rail, the lifting equipment is removed, and the latch pin is inserted into the fixing opening by the reset force of the spring to lock the position of the self-limiting fixing tube.

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