Spatial isolation mold for underwater corrosion repair operation of bridge pier and construction method

Abstract

The invention relates to the technical field of bridge pier repair, in particular to a bridge pier underwater corrosion repair operation space isolation mold and a construction method. An isolation formwork is arranged on the periphery of the pier, and a water pumping mechanism is arranged in the isolation formwork. The isolation formwork is formed by connecting a plurality of sections of annular formworks in the longitudinal direction, each section of annular formwork comprises two opposite butt-joint steel plates, and a bottom plate is arranged at the bottom of the lowermost annular formwork. A clamping ring is arranged on the inner edge of the top of the annular template, and an upper fixing mechanism and a lower fixing mechanism which are used in cooperation with the clamping ring are arranged above the operation platform. The upper portion of the pier is provided with a hoisting mechanism used in cooperation with the isolation formwork. A sliding supporting mechanism is arranged between the inner side of each section of annular formwork and the pier. Sliding supporting mechanisms are arranged between the isolation formworks and the bridge piers, deformation of the formworks caused by too large deepwater pressure is prevented, life safety of operators in the formworks is protected, and the isolation formworks are prevented from deviating from the bridge piers in the process of sinking into water through the sliding supporting mechanisms in the hoisting process.

Description

Technical Field

[0001] The invention relates to the technical field of bridge pier repair, and in particular to a bridge pier underwater corrosion repair operation space isolation mold and a construction method. Background Art

[0002] Underwater bridge piers are extremely susceptible to long-term scouring and erosion, which can cause great damage to the concrete strength, reduce the concrete strength and thus affect the bearing capacity of the bridge piers. Therefore, the space platform for repairing the underwater corrosion of the bridge piers is one of the main technical difficulties currently faced.

[0003] Prior art 202221004180.7 discloses a pedestal cofferdam system suitable for repairing bridge piers of existing bridges, including a cofferdam box, a steel structure prefabricated part arranged on the top of the existing caisson foundation and connected to the hanger, and a cast-in-place bottom plate sealed and connected to the existing piers and the existing caisson foundation, an anti-floating support is arranged between the cast-in-place bottom plate and the support frame, and the bottom plate sealed and connected to the existing caisson foundation and the existing piers is formed by cast-in-place concrete, and an anti-floating support is arranged between the bottom plate and the support frame of the suspension mechanism, which is used to prevent the cofferdam box from being displaced under the action of buoyancy, reasonably utilize permanent structure pile foundations, and reduce project costs. However, since the bottom of the cofferdam needs to be cast-in-place and fixed during the installation of the pedestal cofferdam, it is easily restricted by the environment during the construction process, and can only be repaired in the dry season river piers, and cannot be repaired under turbulent water conditions. Summary of the invention

[0004] The present invention aims to solve the above-mentioned problem, thereby providing a space isolation mold and a construction method for underwater corrosion repair work of piers that do not require cast-in-place fixing.

[0005] The present invention solves the above-mentioned problem by adopting the following technical solution: A space isolation mold for underwater corrosion repair of bridge piers, comprising an operating platform fixed on the bridge pier and located above the water surface, an isolation template is arranged on the periphery of the bridge pier, and a pumping mechanism is arranged in the isolation template; The isolation template is composed of several sections of annular templates connected in the longitudinal direction. Each section of the annular template includes two opposite butt-jointed steel plates. A bottom plate is provided at the bottom of the lowest annular template. A clamping ring is arranged at the inner edge of the top of the annular template, and an upper fixing mechanism and a lower fixing mechanism used in conjunction with the clamping ring are arranged above the operating platform; A hoisting mechanism used in conjunction with the isolation formwork is provided on the upper part of the pier; A sliding support mechanism is provided between the inner side of each section of the annular formwork and the bridge pier.

[0006] A construction method for a space isolation mold for underwater corrosion repair of bridge piers, comprising the following steps: S1: Install the lifting device and operating platform on the bridge pier above the water surface.

[0007] S2: The hoisting device lifts the lowest annular formwork, and the annular formwork moves downward along the pier through the sliding support mechanism until the clamping ring is placed on the lower fixing mechanism.

[0008] S3: The hoisting device lifts the upper annular formwork, connects the two adjacent sections of the annular formwork, then loosens the fixing structure and the clamping ring, lowers the two sections of the annular formwork until the uppermost clamping ring is clamped on the lower fixing mechanism, and repeats the above operation until the isolation formwork is installed on the lower side of the pier to be repaired.

[0009] S4: The lower fixing mechanism and the upper fixing mechanism jointly clamp and fix the uppermost clamping ring.

[0010] S5: The pumping mechanism drains the water in the isolation formwork.

[0011] S6: Repair the bridge piers inside the isolation formwork by chiseling.

[0012] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: A sliding support mechanism is provided between the isolation formwork and the bridge pier to prevent deformation of the formwork due to excessive deep water pressure and to protect the lives of workers inside the formwork. During the hoisting process, the sliding support mechanism prevents the isolation formwork from deviating from the pier position during the sinking process. The construction speed is fast, the cost is low, and it can be reused. The multi-section formwork structure can fix the mold in the middle section of the pier, reducing the investment in the mold. The cooperation of the fixing mechanism and the clamping ring prevents the isolation formwork from floating up and down.

[0013] Preferably, a further technical solution of the present invention is: Furthermore, a sealing air-filled strip is provided between the bottom plate and the bridge pier.

[0014] Furthermore, an oblique support is provided between the bottom of the operating platform and the bridge pier, and the bottom of the oblique support is commonly connected with a fixing sleeve sleeved on the bridge pier.

[0015] Furthermore, the lower fixing mechanism comprises a lower casing fixed on the bridge pier at intervals along the annular direction and located below the clamping ring, and a lower fixing rod is inserted into the lower casing and abuts against the bottom of the clamping ring.

[0016] Furthermore, the upper fixing mechanism comprises an upper sleeve fixed on the bridge pier at intervals along the annular direction and located above the clamping ring, and an upper fixing rod is inserted into the upper sleeve and abuts against the top of the clamping ring.

[0017] Furthermore, the lifting mechanism includes a fixed platform fixed on the upper part of the pier, a winch is arranged on the fixed platform, a fixed pulley used in conjunction with the winch wire rope is arranged at the edge of the fixed platform, and lifting ears are symmetrically arranged on the outer edge of the top of the annular template.

[0018] Furthermore, the sliding support mechanism includes a sliding sleeve which is mounted on the pier and slidably connected to the pier. The sliding sleeve is composed of a number of splicing plates. Support rods are respectively arranged on the back sides of the splicing plates. The outer ends of the support rods are fixed to the middle of the annular template.

[0019] Furthermore, a detection bracket is provided downwardly extending from the bottom of the base plate, and an ultrasonic detector is provided at the bottom of the detection bracket.

[0020] Furthermore, the water pumping mechanism comprises a water pump located on the top of the base plate, and the water pump is connected to a water pumping pipe extending from the top of the isolation template. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main cross-sectional structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the top view of the ring template according to an embodiment of the present invention; Marked in the figure are: operating platform 1, annular formwork 2, base plate 3, bridge pier 4, clamping ring 5, lower fixing mechanism 6, upper fixing mechanism 7, winch 8, lifting lug 9, sliding sleeve 10, support rod 11, detection bracket 12, ultrasonic detector 13, water pump 14, water pumping pipe 15, sealing and inflatable strip 16. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0023] A space isolation mold for underwater corrosion repair of bridge piers, comprising an operating platform 1 fixed on the bridge pier 4 and located above the water surface, an isolation template is arranged on the periphery of the bridge pier 4, and a pumping mechanism is arranged in the isolation template; The isolation formwork is composed of several sections of annular formwork 2 connected in the longitudinal direction, each section is 2 meters high, each section of the annular formwork 2 includes two opposite butt-jointed steel plates, the butt joints of the butt-jointed steel plates are oppositely provided with connecting ear plates and connected by bolts, and adjacent annular formworks 2 are connected by flanges, and a bottom plate 3 is provided at the bottom of the lowest annular formwork 2, and the bottom plate 3 is located at the periphery of the pier 4; A snap ring 5 is provided at the inner edge of the top of the annular template 2, and an upper fixing mechanism 6 and a lower fixing mechanism 7 used in conjunction with the snap ring 5 are provided above the operating platform 1; The upper part of the pier 4 is provided with a hoisting mechanism used in conjunction with the isolation formwork; A sliding support mechanism is provided between the inner side of each section of the annular formwork 2 and the bridge pier 4 .

[0024] A construction method for a space isolation mold for underwater corrosion repair of bridge piers, comprising the following steps: S1: Install the lifting device and the operating platform 1 on the bridge pier 4 above the water surface, and the construction personnel stand on the operating platform 1 to connect the lifting device with the annular formwork 2.

[0025] S2: The hoisting device lifts the lowest annular formwork 2, and the annular formwork 2 moves downward along the pier 4 through the sliding support mechanism until the clamping ring 5 is placed on the lower fixing mechanism.

[0026] S3: The hoisting device lifts the upper annular formwork 2, connects the two adjacent sections of the annular formwork 2, then loosens the fixing structure and the clamping ring 5, lowers the two sections of the annular formwork 2 until the uppermost clamping ring 5 is clamped on the lower fixing mechanism, and repeats the above operation until the isolation formwork is installed on the lower side of the pier 4 to be repaired.

[0027] S4: The lower fixing mechanism 6 and the upper fixing mechanism 7 jointly clamp and fix the uppermost clamping ring 5 to prevent the mold from floating up or sinking.

[0028] S5: The pumping mechanism drains the water in the isolation formwork and clears a water-free space around the bridge pier 4.

[0029] S6: Chisel and repair the bridge pier 4 in the isolation formwork.

[0030] Furthermore, a sealing air-filled strip 16 is provided between the bottom plate 3 and the pier 4. When the isolation template is lowered to a designated position, air is inflated into the sealing air-filled strip 16 to fill the gap between the bottom plate 3 and the pier 4, thereby separating the water area inside the isolation template from the water area outside.

[0031] Furthermore, an oblique support is provided between the bottom of the operating platform 1 and the bridge pier 4 , and the bottom of the oblique support is commonly connected with a fixing sleeve which is sleeved on the bridge pier, so as to enhance the stability of the operating platform 1 .

[0032] Furthermore, the lower fixing mechanism 6 includes a lower casing fixed on the pier 4 at an annular interval and located below the clamping ring 5, and a lower fixing rod is inserted into the lower casing and rests against the bottom of the clamping ring. After the lower fixing rod is inserted into the lower casing, the two are fixed by bolts. Before the single-section annular formwork 2 is lowered, the lifting mechanism lifts the annular formwork 2 slightly and then takes out the lower fixing rod to prevent affecting the lowering of the annular formwork. The lower fixing mechanism 6 and the clamping ring 5 cooperate to avoid sinking.

[0033] Furthermore, the upper fixing mechanism 7 includes an upper sleeve fixed on the pier 4 at an annular interval and located above the clamping ring 5, and an upper fixing rod is inserted into the upper sleeve and rests on the top of the clamping ring 5. The structure is similar to that of the lower fixing mechanism 6. The upper fixing mechanism 7 and the clamping ring 5 cooperate to avoid floating.

[0034] Furthermore, the lifting mechanism includes a fixed platform fixed on the upper part of the pier 4, a winch 8 is arranged on the fixed platform, a fixed pulley used in conjunction with the steel wire rope of the winch 8 is arranged at the edge of the fixed platform, and lifting ears 9 are symmetrically arranged on the outer edge of the top of the annular formwork 2. The construction personnel stand on the operating platform 1 and tie the steel wire rope of the winch 8 to the lifting ears 9, driving the annular formwork 2 to move up and down.

[0035] Furthermore, the sliding support mechanism includes a sliding sleeve 10 which is mounted on the pier 4 and is slidably connected to the pier. The sliding sleeve 10 is composed of a number of splicing plates. Support rods 11 are respectively arranged on the back sides of the splicing plates. The outer ends of the support rods 11 are fixed to the middle of the annular formwork 2. The support rods 11 can prevent the deep water pressure from being too large, causing deformation of the annular formwork 2, and protect the lives of workers in the annular formwork 2. The shape of the sliding sleeve 10 is adapted to the cross-section of the pier 4. The sliding sleeve 10 ensures that the annular formwork 2 moves longitudinally along the pier 4.

[0036] Furthermore, a detection bracket 12 is extended downward from the bottom of the base plate 3, and an ultrasonic detector 13 is provided at the bottom of the detection bracket 12, which can measure the degree of erosion of the pier 4 and determine the length of the isolation formwork to be installed, thereby avoiding waste of labor and materials due to unclear detection.

[0037] Furthermore, the water pumping mechanism includes a water pump 14 located on the top of the bottom plate 3 , and the water pump 14 is connected to a water pumping pipe 15 extending from the top of the isolation template.

[0038] A sliding support mechanism is provided between the isolation formwork and the bridge pier to prevent deformation of the formwork due to excessive deep water pressure and to protect the lives of workers inside the formwork. During the hoisting process, the sliding support mechanism prevents the isolation formwork from deviating from the pier position during sinking into the water. The construction speed is fast, the cost is low, and it can be reused. The multi-section formwork structure can fix the mold in the middle section of the pier, reducing the investment in the mold. The cooperation of the fixing mechanism and the clamping ring prevents the isolation formwork from floating up and down.

[0039] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A space isolation mold for underwater corrosion repair of bridge piers, characterized by: It includes an operating platform fixed on the bridge pier and located above the water surface, an isolation template is arranged on the periphery of the bridge pier, and a pumping mechanism is arranged in the isolation template; The isolation template is composed of several sections of annular templates connected in the longitudinal direction. Each section of the annular template includes two opposite butt-jointed steel plates. A bottom plate is provided at the bottom of the lowest annular template. A clamping ring is arranged at the inner edge of the top of the annular template, and an upper fixing mechanism and a lower fixing mechanism used in conjunction with the clamping ring are arranged above the operating platform; A hoisting mechanism used in conjunction with the isolation formwork is provided on the upper part of the pier; A sliding support mechanism is provided between the inner side of each section of the annular formwork and the bridge pier.

2. The space isolation mold for underwater corrosion repair of bridge piers according to claim 1 is characterized by: A sealing inflatable strip is provided between the bottom plate and the bridge pier.

3. The space isolation mold for underwater corrosion repair of bridge piers according to claim 1 is characterized by: An oblique support is arranged between the bottom of the operating platform and the bridge pier, and the bottom of the lower support is commonly connected with a fixed sleeve sleeved on the bridge pier.

4. The space isolation mold for underwater corrosion repair of bridge piers according to claim 1 is characterized by: The lower fixing mechanism comprises a lower casing fixed on the bridge pier at intervals along the annular direction and located below the clamping ring, and a lower fixing rod abutting against the bottom of the clamping ring is inserted into the lower casing.

5. The space isolation mold for underwater corrosion repair of bridge piers according to claim 1 is characterized by: The upper fixing mechanism comprises an upper sleeve fixed on the bridge pier at intervals along the annular direction and located above the clamping ring, and an upper fixing rod is inserted into the upper sleeve and abuts against the top of the clamping ring.

6. The space isolation mold for underwater corrosion repair of bridge piers according to claim 1 is characterized by: The hoisting mechanism includes a fixed platform fixed on the upper part of the pier, a winch is arranged on the fixed platform, a fixed pulley used in conjunction with the winch wire rope is arranged at the edge of the fixed platform, and lifting ears are symmetrically arranged on the outer edge of the top of the annular template.

7. The space isolation mold for underwater corrosion repair of bridge piers according to claim 1 is characterized by: The sliding support mechanism includes a sliding sleeve which is mounted on the pier and is slidably connected to the pier. The sliding sleeve is composed of a plurality of splicing plates. Support rods are respectively arranged on the back sides of the splicing plates. The outer ends of the support rods are fixed to the middle of the annular template.

8. The space isolation mold for underwater corrosion repair of bridge piers according to claim 1 is characterized by: A detection bracket is provided at the bottom of the bottom plate extending downward, and an ultrasonic detector is provided at the bottom of the detection bracket.

9. The space isolation mold for underwater corrosion repair of bridge piers according to claim 1 is characterized by: The water pumping mechanism comprises a water pump located on the top of the bottom plate, and the water pump is connected with a water pumping pipe extending from the top of the isolation template.

10. A construction method using the bridge pier underwater corrosion repair work space isolation mold according to any one of claims 1 to 9, characterized in that: The steps include: S1: Install the lifting device and operating platform on the bridge pier above the water surface; S2: The hoisting device lifts the lowest annular formwork, and the annular formwork moves downward along the pier through the sliding support mechanism until the clamping ring is placed on the lower fixing mechanism; S3: The hoisting device lifts the upper annular formwork, connects the two adjacent sections of the annular formwork, then loosens the fixing structure and the clamping ring, lowers the two sections of the annular formwork until the uppermost clamping ring is clamped on the lower fixing mechanism, and repeats the above operation until the isolation formwork is installed on the lower side of the pier position to be repaired; S4: The lower fixing mechanism and the upper fixing mechanism jointly clamp and fix the uppermost clamping ring; S5: The pumping mechanism drains the water in the isolation template; S6: Repair the bridge piers inside the isolation formwork by chiseling.

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