Underwater bridge pier corrosion repair operation space isolation mold and construction method

Abstract

The present application relates to the technical field of pier repair, in particular to a kind of underwater corrosion repair operation space isolation mould of pier and construction method.The outer periphery of pier is provided with isolation formwork, and water pumping mechanism is arranged in the isolation formwork;The isolation formwork is connected by a plurality of annular formworks along the longitudinal direction, each annular formwork includes two opposite butt joint steel plates, and the bottom of the lowermost annular formwork is provided with a bottom plate;The inner edge of the top of annular formwork is provided with a snap ring, and the upper fixed mechanism and the lower fixed mechanism matched with the snap ring are arranged above the operation platform;The upper part of pier is provided with hoisting mechanism matched with isolation formwork;Sliding support mechanism is arranged between the inner side of each annular formwork and pier.Sliding support mechanism is arranged between isolation formwork and pier, to prevent excessive deep water pressure, cause the deformation of formwork, and protect the life safety of the personnel in formwork, and the hoisting process is exempted from the deviation of isolation formwork from the position of pier in the process of sinking into water by sliding support mechanism.

Description

Technical Field

[0001] This invention relates to the field of bridge pier repair technology, specifically a space isolation mold and construction method for underwater corrosion repair of bridge piers. Background Technology

[0002] Underwater bridge piers are extremely susceptible to long-term erosion, which can severely damage the concrete strength and reduce its load-bearing capacity. Therefore, the construction of an underwater corrosion repair platform for bridge piers is one of the main technical challenges currently faced.

[0003] Existing technology 202221004180.7 discloses a cofferdam system suitable for repairing bridge piers of existing bridges, including a cofferdam box, a precast steel structure component set on top of the existing caisson foundation and connected to the lifting device, and a cast-in-place base plate sealed to the existing bridge pier and the existing caisson foundation. Anti-buoyancy supports are provided between the cast-in-place base plate and the support frame. The base plate is formed by cast-in-place concrete and is sealed to the existing caisson foundation and the existing bridge pier. Anti-buoyancy supports are provided between the base plate and the support frame of the suspension mechanism to prevent displacement of the cofferdam box under buoyancy. This system makes reasonable use of permanent structural pile foundations and reduces project costs. However, because the bottom of the cofferdam needs to be cast-in-place and fixed during installation, it is easily restricted by the environment during construction. Repairs can only be carried out on river piers during the dry season and cannot be performed in turbulent water conditions. Summary of the Invention

[0004] The present invention aims to solve the above problems, thereby providing a space isolation mold and construction method for underwater corrosion repair of bridge piers that does not require on-site casting and fixing.

[0005] The technical solution adopted by the present invention to solve the aforementioned problem is as follows:

[0006] An isolation mold for underwater corrosion repair of bridge piers includes an operating platform fixed on the bridge pier and located above the water surface, an isolation template is provided on the outer periphery of the bridge pier, and a pumping mechanism is provided in the isolation template;

[0007] The isolation template is composed of several ring templates connected longitudinally. Each ring template includes two opposite butt steel plates, and the bottom of the lowest ring template is provided with a base plate.

[0008] A retaining ring is provided at the inner edge of the top of the ring template, and an upper fixing mechanism and a lower fixing mechanism are provided above the operating platform to cooperate with the retaining ring;

[0009] The upper part of the bridge pier is equipped with a hoisting mechanism that works in conjunction with the isolation formwork;

[0010] Each section of the ring template is equipped with a sliding support mechanism between its inner side and the bridge pier.

[0011] A construction method for an isolation mold for underwater corrosion repair of bridge piers includes the following steps:

[0012] S1: Install the hoisting device and operating platform onto the bridge pier above the water surface.

[0013] S2: The hoisting device lifts the bottom ring template, and the ring template moves downward along the pier through the sliding support mechanism until the retaining ring is placed on the lower fixing mechanism.

[0014] S3: The hoisting device lifts the upper ring template, connects two adjacent ring template sections, then loosens the fixing structure and the retaining ring, lowers two ring template sections to the uppermost retaining ring, and locks them onto the lower fixing mechanism. Repeat the above operation until the isolation template is installed on the lower side of the pier to be repaired.

[0015] S4: The lower fixing mechanism and the upper fixing mechanism work together to clamp and fix the uppermost retaining ring.

[0016] S5: The pumping mechanism drains the water from the isolation template.

[0017] S6: Chisel and repair the bridge piers within the isolation template.

[0018] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art:

[0019] Sliding support mechanisms are installed 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 position of the bridge pier 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 bridge pier, reducing the investment in molds. The cooperation of the fixing mechanism and the retaining ring prevents the isolation formwork from floating up and down.

[0020] As a preferred embodiment, a further technical solution of the present invention is:

[0021] Furthermore, a sealing air strip is installed between the base plate and the pier.

[0022] Furthermore, diagonal supports are installed between the bottom of the operating platform and the bridge pier, and the bottom of the diagonal supports is connected to a fixing sleeve that fits onto the bridge pier.

[0023] Furthermore, the lower fixing mechanism includes a lower sleeve that is fixed to the bridge pier at intervals along the circumference and located below the retaining ring, and a lower fixing rod that abuts against the bottom of the retaining ring is inserted into the lower sleeve.

[0024] Furthermore, the upper fixing mechanism includes an upper sleeve that is fixed to the pier along the circumferential direction and located above the retaining ring, and an upper fixing rod that abuts against the top of the retaining ring is inserted inside the upper sleeve.

[0025] Furthermore, the hoisting mechanism includes a fixed platform fixed to the upper part of the bridge pier, a winch installed on the fixed platform, fixed pulleys for use with the winch wire rope at the edge of the fixed platform, and lifting lugs symmetrically installed on the outer edge of the top of the annular template.

[0026] Furthermore, the sliding support mechanism includes a sliding sleeve that is fitted onto the bridge pier and slidably connected to the bridge pier. The sliding sleeve is composed of several splicing plates, and support rods are respectively provided on the back side of the splicing plates. The outer ends of the support rods are fixed to the middle of the annular template.

[0027] Furthermore, a detection bracket is provided extending downward from the bottom of the base plate, and an ultrasonic detector is provided at the bottom of the detection bracket.

[0028] Furthermore, the pumping mechanism includes a pump located at the top of the base plate, and a pumping pipe connected to the pump that extends from the top of the isolation template. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the front cross-sectional structure of an embodiment of the present invention;

[0030] Figure 2 This is a top view of the annular template according to an embodiment of the present invention;

[0031] The components in the diagram are marked as follows: 1. Operating platform; 2. Ring template; 3. Base plate; 4. Pier; 5. Clamping ring; 6. Lower fixing mechanism; 7. Upper fixing mechanism; 8. Winch; 9. Lifting lug; 10. Sliding sleeve; 11. Support rod; 12. Detection bracket; 13. Ultrasonic detector; 14. Water pump; 15. Water pumping pipe; 16. Sealing air strip. Detailed Implementation

[0032] The present invention will be further described below with reference to embodiments, which are intended only to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0033] An isolation mold for underwater corrosion repair of bridge piers includes an operating platform 1 fixed on the bridge pier 4 and located above the water surface, an isolation template is provided on the outer periphery of the bridge pier 4, and a pumping mechanism is provided in the isolation template;

[0034] The isolation template is composed of several sections of ring template 2 connected longitudinally. Each section is 2 meters high. Each section of ring template 2 includes two opposite butt steel plates. The butt joint of the steel plates is provided with connecting ear plates and connected by bolts. Adjacent ring templates 2 are connected by flanges. The bottom of the lowest ring template 2 is provided with a bottom plate 3, which is located on the outer periphery of the pier 4.

[0035] A retaining ring 5 is provided at the inner edge of the top of the ring template 2, and an upper fixing mechanism 6 and a lower fixing mechanism 7 that cooperate with the retaining ring 5 are provided above the operating platform 1.

[0036] The upper part of pier 4 is equipped with a hoisting mechanism that works in conjunction with the isolation template;

[0037] Each section of the ring template 2 is equipped with a sliding support mechanism between its inner side and the pier 4.

[0038] A construction method for an isolation mold for underwater corrosion repair of bridge piers includes the following steps:

[0039] S1: Install the hoisting device and operating platform 1 onto the bridge pier 4 above the water surface. Construction workers stand on the operating platform 1 and connect the hoisting device to the ring template 2.

[0040] S2: The hoisting device lifts the bottom ring template 2, and the ring template 2 moves downward along the pier 4 through the sliding support mechanism until the retaining ring 5 is placed on the lower fixing mechanism.

[0041] S3: The hoisting device lifts the upper ring template 2, connects two adjacent ring template sections 2, then loosens the fixing structure and the retaining ring 5, lowers two ring template sections 2 to the uppermost retaining ring 5 and locks them onto the lower fixing mechanism, and repeats the above operation until the isolation template is installed on the lower side of the pier 4 that needs to be repaired.

[0042] S4: The lower fixing mechanism 6 and the upper fixing mechanism 7 together clamp and fix the uppermost retaining ring 5 to prevent the mold from floating or sinking.

[0043] S5: The pumping mechanism drains the water from the isolation template, clearing a waterless space around pier 4.

[0044] S6: Repair the bridge pier 4 within the isolation template by chiseling.

[0045] Furthermore, a sealing air-inflating strip 16 is provided between the base plate 3 and the pier 4. When the isolation template is lowered to the designated position, air is inflated into the sealing air-inflating strip 16 to fill the gap between the base plate 3 and the pier 4, thereby separating the water inside the isolation template from the water outside.

[0046] Furthermore, an inclined support is provided between the bottom of the operating platform 1 and the pier 4, and the bottom of the inclined support is connected to a fixing sleeve that is fitted on the pier, which enhances the stability of the operating platform 1.

[0047] Furthermore, the lower fixing mechanism 6 includes a lower sleeve that is fixed to the pier 4 at intervals along the circumference and located below the retaining ring 5. A lower fixing rod is inserted into the lower sleeve and abuts against the bottom of the retaining ring. After the lower fixing rod is inserted into the lower sleeve, the two are fixed by bolts. Before the single-section annular template 2 is lowered, the hoisting mechanism slightly lifts the annular template 2 and then removes the lower fixing rod to prevent it from affecting the lowering of the annular template. The lower fixing mechanism 6 and the retaining ring 5 cooperate to prevent sinking.

[0048] Furthermore, the upper fixing mechanism 7 includes an upper sleeve that is fixed to the pier 4 at intervals along the circumference and located above the retaining ring 5. An upper fixing rod that abuts against the top of the retaining ring 5 is inserted into the upper sleeve. The structure is similar to that of the lower fixing mechanism 6. The upper fixing mechanism 7 and the retaining ring 5 cooperate to prevent floating.

[0049] Furthermore, the hoisting mechanism includes a fixed platform fixed to the upper part of the pier 4, a winch 8 is installed on the fixed platform, and a fixed pulley for use with the wire rope of the winch 8 is installed at the edge of the fixed platform. Lifting lugs 9 are symmetrically arranged on the outer edge of the top of the ring template 2. Construction workers stand on the operating platform 1 and tie the wire rope of the winch 8 to the lifting lugs 9 to drive the ring template 2 to move up and down.

[0050] Furthermore, the sliding support mechanism includes a sliding sleeve 10 that is fitted onto the pier 4 and slidably connected to the pier. The sliding sleeve 10 is composed of several splicing plates. Support rods 11 are respectively provided on the back side of the splicing plates. The outer end of the support rod 11 is fixed to the middle of the annular template 2. The support rod 11 can prevent excessive deep water pressure from causing deformation of the annular template 2 and protect the life safety of the workers inside the annular template 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 template 2 can move longitudinally along the pier 4.

[0051] Furthermore, a detection bracket 12 is provided extending downward from the bottom of the base plate 3, and an ultrasonic detector 13 is provided at the bottom of the detection bracket 12. This can measure the degree of erosion of the pier 4 and determine the length of the isolation template to be installed, thus avoiding waste of materials and labor due to unclear detection.

[0052] Furthermore, the pumping mechanism includes a pump 14 located at the top of the base plate 3, and a pumping pipe 15 extending from the top of the isolation template is connected to the pump 14.

[0053] Sliding support mechanisms are installed 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 position of the bridge pier as it sinks 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 bridge pier, reducing the investment in molds. The cooperation of the fixing mechanism and the retaining ring prevents the isolation formwork from floating up and down.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A pier underwater corrosion repair work space isolation mold, characterized by: The bridge pier is provided with an isolation formwork, and the bridge pier is provided with a sliding support mechanism between the inside of each ring-shaped formwork and the bridge pier. The isolation formwork is longitudinally connected by a plurality of ring-shaped formworks, each ring-shaped formwork comprises two opposite butt-jointed steel plates, and the bottom of the lowermost ring-shaped formwork is provided with a bottom plate. The inner edge of the top of the ring-shaped formwork is provided with a snap ring, and the operating platform is provided with an upper fixing mechanism and a lower fixing mechanism which are used in cooperation with the snap ring. The upper part of the bridge pier is provided with a hoisting mechanism which is used in cooperation with the isolation formwork. The sliding support mechanism is arranged between the inside of each ring-shaped formwork and the bridge pier. The lower fixing mechanism comprises a lower sleeve which is fixed on the bridge pier in a ring shape and is located below the snap ring, and a lower fixing rod is inserted into the lower sleeve and abuts against the bottom of the snap ring. The upper fixing mechanism comprises an upper sleeve which is fixed on the bridge pier in a ring shape and is located above the snap ring, and an upper fixing rod is inserted into the upper sleeve and abuts against the top of the snap ring. The sliding support mechanism comprises a sliding sleeve which is sleeved on the bridge pier and is in sliding connection with the bridge pier, and the sliding sleeve is composed of a plurality of spliced plates, the back side of each spliced plate is provided with a support rod, and the outer end of the support rod is fixed to the middle part of the ring-shaped formwork. The bottom plate is provided with a detection support which extends downward from the bottom of the bottom plate, and an ultrasonic detector is arranged at the bottom of the detection support.

2. The pier underwater corrosion repair work space isolation mold of claim 1, wherein: A sealing air inflation strip is arranged between the bottom plate and the bridge pier.

3. The pier underwater corrosion repair work space isolation mold of claim 1, wherein: An inclined support is arranged between the bottom of the operating platform and the bridge pier, and a fixing sleeve is sleeved on the bridge pier.

4. The pier underwater corrosion repair work space isolation mold of claim 1, wherein: The hoisting mechanism comprises a fixing platform which is fixed on the upper part of the bridge pier, a winch is arranged on the fixing platform, a fixed pulley which is used in cooperation with the steel wire rope of the winch is arranged at the edge of the fixing platform, and lifting lugs are symmetrically arranged at the outer edge of the top of the ring-shaped formwork.

5. The pier underwater corrosion repair work space isolation mold of claim 1, wherein: The water pumping mechanism comprises a water pump which is arranged at the top of the bottom plate, and a water pumping pipe which extends out of the isolation formwork from the top of the water pump.

6. A construction method for using the space isolation mold for a pier underwater corrosion repair work according to any one of claims 1 to 5, characterized by: The method comprises the following steps: S1: installing the hoisting device and the operating platform on the bridge pier above the water surface; S2: lifting the lowermost ring-shaped formwork by the hoisting device, moving the ring-shaped formwork downward along the bridge pier through the sliding support mechanism, and placing the snap ring on the lower fixing mechanism; S3: lifting the ring-shaped formwork above by the hoisting device, connecting the two adjacent ring-shaped formworks, then loosening the fixing structure and the snap ring, and lowering the two ring-shaped formworks to the lowermost snap ring which is clamped on the lower fixing mechanism, and repeating the above operation until the isolation formwork is installed on the lower side of the bridge pier to be repaired; S4: clamping and fixing the uppermost snap ring by the lower fixing mechanism and the upper fixing mechanism; S5: draining the water in the isolation formwork by the water pumping mechanism; S6: chiseling and repairing the bridge pier in the isolation formwork.

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