Precise connection method for large eccentric sleeve box bottom plate reverse anchor bolt and pile foundation bracket top plate

Abstract

The invention belongs to the technical field of bridge construction, and particularly relates to a method for accurately connecting a large eccentric sleeve box bottom plate reverse anchor bolt and a pile foundation bracket top plate, which comprises the following steps of: 1, constructing a bottom plate supporting steel bracket, and performing cutting processing and field welding construction on a steel bracket structure in a steel bar field according to the requirements of a design drawing; according to the accurate connection method for the reverse anchor bolt of the large eccentric sleeve box bottom plate and the pile foundation bracket top plate, the step one to the step six are set, in the using process, the large eccentric sleeve box bottom plate is integrally divided into an A area, a B area and a C area, hoisting and assembling are conducted in batches, sleeve box assembling, guiding and positioning are conducted on the sleeve box bottom plate through a positioning and guiding mechanism, and the large eccentric sleeve box bottom plate is accurately connected with the pile foundation bracket top plate. And accurate and rapid connection of the bottom plate of the pouring jacket and the bracket reverse anchor bolt is ensured, so that the problems of large positioning error, difficulty in ensuring the connection strength and long construction period existing in the existing manual positioning and extensive connection process are solved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, in particular to a method for accurately connecting a large eccentric casing bottom plate anti-anchor bolt with a pile foundation bracket top plate. Background Art

[0002] In the construction of long-span bridge structures, the precise connection between the large eccentric box bottom plate and the pile foundation bracket top plate is the key to ensuring the safety and stability of the structure. Traditional connection methods often rely on manual positioning and extensive connection processes, which have the disadvantages of large positioning errors, difficult to ensure connection strength and long construction period. Therefore, a precise connection method between the large eccentric box bottom plate anti-anchor bolts and the pile foundation bracket top plate is needed. Summary of the invention

[0003] Based on the existing manual positioning and extensive connection technology, there are technical problems such as large positioning error, difficult to ensure connection strength and long construction period. The present invention proposes a precise connection method between the large eccentric casing bottom plate anti-anchor bolts and the pile foundation corbel top plate.

[0004] The invention provides a method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts with the pile foundation bracket top plate, comprising the following steps:

[0005] Step 1: Construction of bottom plate supporting steel brackets. The steel bracket structure is cut and processed in the steel bar yard and welded on site according to the design drawing requirements.

[0006] Step 2: Divide the large eccentric casing bottom plate into three areas: A, B, and C, and prefabricate them at the onshore prefabrication site;

[0007] Step 3: Positioning of embedded parts: Before pouring the top plate of the pile foundation corbel, accurately embed the positioning parts;

[0008] Step 4: Install the positioning guide mechanism in the installation area to perform hoisting, docking and positioning installation on the bottom plate of the casing;

[0009] Step 5: Hoisting construction, hoist the partitioned boxes one by one;

[0010] Step 6: Install the anti-anchor bolts. After hoisting the casing bottom plate to fit the pile foundation, use the anti-anchor bolts to connect it to the embedded parts of the pile foundation corbel top plate at the predetermined points on the casing bottom plate.

[0011] Preferably, when welding the steel corbels on site in step 1, the bottom welding operation platform is first constructed, and the construction platform is welded 1.9m below the bottom of the base plate. The platform is welded to the side wall of the pile foundation steel casing using ∠60 angle steel to form a triangular steel frame, T16 steel bars are welded on the steel frame, and wooden boards are laid as a construction platform. A 1.5m high green safety net is hung on the outside of the platform to protect the safety of operators.

[0012] Preferably, the positioning member in step three is a positioning function rod that is perpendicular to the top plane of the pile foundation at 90 degrees, and nine positioning function rods are distributed in a triangular shape at the installation positions of the bottom plates of the three zones A, B and C.

[0013] Preferably, the positioning guide mechanism in step four includes a positioning sleeve, the inner wall of the positioning sleeve is slidably connected to the surface of the positioning function rod, the top of the positioning sleeve is fixedly connected to a load-bearing support platform, the inner wall of the load-bearing support platform is rotatably connected to a positioning connecting plate through a pin shaft, and the three positioning connecting plates are distributed in a circular array with the axis of the load-bearing support platform as the center.

[0014] Preferably, the surface of the positioning connecting plate is in a U-shape, one end of the positioning connecting plate is rotatably connected to an arc-shaped positioning plate through a pin shaft, and the lower surface of the arc-shaped positioning plate is slidably connected to the surface of the bottom plate of the casing.

[0015] Preferably, the surface of the positioning connecting plate close to the arc-shaped positioning plate is fixedly connected to a limiting block, the surface of the limiting block is threadedly connected to a limiting bolt, and one end of the limiting bolt is plugged into the surface of the arc-shaped positioning plate.

[0016] Preferably, the other end of the positioning link is rotatably connected to the supporting link via a pin, one end of the supporting link is rotatably connected to the jacking bracket platform via a pin, the upper surface of the jacking bracket platform is fixedly connected to a conical sleeve, and the top of the conical sleeve is fixedly connected to a guide rod.

[0017] Preferably, a lifting hydraulic cylinder is fixedly connected to the upper surface of the load-bearing support platform, and the lifting hydraulic cylinder includes a lifting hydraulic rod, and one end of the lifting hydraulic rod is fixedly connected to the lower surface of the lifting support platform.

[0018] Preferably, the surface of the arc-shaped positioning plate is rotatably connected to an adjusting hydraulic cylinder via a pin shaft, the adjusting hydraulic cylinder includes an adjusting hydraulic rod, one end of the adjusting hydraulic rod is fixedly connected to a rotating seat, and the inner wall of the rotating seat is rotatably connected to the surface of the positioning connecting plate via a pin shaft.

[0019] Preferably, during the hoisting construction process in step 5, in order to avoid conflict between the steel wire rope and the steel pipe pile, the top of the steel pipe pile needs to be cut to the designed elevation of the bottom of the cap before the casing is hoisted.

[0020] The beneficial effects of the present invention are:

[0021] By setting steps one to six, when in use, the large eccentric casing bottom plate is divided into three areas A, B, and C, which are hoisted and assembled in batches, and the casing assembly is guided and positioned on the casing bottom plate by a positioning and guiding mechanism to ensure that the casing bottom plate and the corbel anti-anchor bolts are accurately and quickly connected, thereby solving the problems of existing manual positioning and extensive connection technology, such as large positioning errors, difficulty in ensuring connection strength, and long construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation corbel top plate proposed by the present invention;

[0023] Figure 2 A top view of the positioning function rod structure of the method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate proposed by the present invention;

[0024] Figure 3 A three-dimensional diagram of the guide rod structure of the method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate proposed by the present invention;

[0025] Figure 4 A top view of the guide rod structure of the method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate proposed by the present invention;

[0026] Figure 5 A three-dimensional diagram of the jacking support platform structure of the method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate proposed by the present invention;

[0027] Figure 6 A stereoscopic diagram of the positioning sleeve structure of the method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate proposed by the present invention;

[0028] Figure 7 A front view of a load-bearing support platform structure for a method of accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation corbel top plate proposed by the present invention.

[0029] In the figure: 1. positioning function rod; 2. positioning sleeve; 201. load-bearing support platform; 202. positioning connecting plate; 203. arc-shaped positioning plate; 204. limit block; 205. limit bolt; 206. supporting connecting plate; 207. jacking support platform; 208. conical sleeve; 209. guide rod; 210. jacking hydraulic cylinder; 211. jacking hydraulic rod; 212. adjusting hydraulic cylinder; 213. adjusting hydraulic rod; 214. rotating seat. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Reference Figure 1-Figure 7 The method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate includes the following steps:

[0032] Step 1: Construction of bottom plate supporting steel corbels. The steel corbel structure is cut and processed in the rebar yard and welded on site according to the requirements of the design drawings.

[0033] Specifically, when welding steel brackets on site, the bottom welding operation platform is constructed first. The construction platform is welded 1.9m below the bottom of the base plate. The platform is welded to the side wall of the pile foundation steel casing using ∠60 angle steel to form a triangular steel frame. T16 steel bars are welded on the steel frame, and wooden boards are laid as the construction platform. A 1.5m high green safety net is hung on the outside of the platform to protect the safety of operators. A 5cm thick wooden board is set up between the pile foundation and the pile foundation construction platform as a temporary aisle. The temporary aisle needs to be standardized, and protective railings need to be set on both sides of the aisle to prevent workers from falling. It is strictly forbidden to pile up construction materials in the aisle.

[0034] The on-site bracket welding adopts manual welding, and the welding seam meets the requirements of relevant specifications. Ensure the safety of construction personnel during welding, regularly check the welding point status of the construction platform, and promptly repair welding if there are dangerous conditions such as welding falling off. Construction personnel must abide by the welding precautions, take good personal safety protection, and wear safety helmets, safety belts, protective goggles, etc.

[0035] After the corbel belly plate welding is completed, the top of the belly plate is cut and polished according to actual measurement, and then the corbel top plate is welded to ensure that the top surface of the corbel is level and meets the design requirements.

[0036] Step 2: Divide the large eccentric casing bottom plate into three areas: A, B, and C, and prefabricate them at the onshore prefabrication site.

[0037] Step 3: Positioning of embedded parts: Accurately embed the positioning parts before pouring the top plate of the pile foundation corbel.

[0038] Furthermore, the positioning member is a positioning function rod 1 which is perpendicular to the top plane of the pile foundation at 90 degrees, and the nine positioning function rods 1 are distributed in a triangular shape at the installation positions of the bottom plates of the three zones A, B and C.

[0039] Step 4: Install the positioning guide mechanism in the installation area to perform hoisting, docking and positioning installation on the bottom plate of the casing.

[0040] Furthermore, the positioning guide mechanism includes a positioning sleeve 2, the inner wall of the positioning sleeve 2 is slidably connected to the surface of the positioning function rod 1, the top of the positioning sleeve 2 is fixedly connected to the load-bearing support platform 201, the inner wall of the load-bearing support platform 201 is rotatably connected to the positioning connecting plate 202 through a pin shaft, and the three positioning connecting plates 202 are distributed in a circular array with the axis of the load-bearing support platform 201 as the center.

[0041] The surface of the positioning connecting plate 202 is in a 7-shape, and one end of the positioning connecting plate 202 is rotatably connected to an arc-shaped positioning plate 203 via a pin shaft, and the lower surface of the arc-shaped positioning plate 203 is slidably connected to the surface of the bottom plate of the casing.

[0042] The surface of the positioning connecting plate 202 close to the arc-shaped positioning plate 203 is fixedly connected to the limiting block 204 , the surface of the limiting block 204 is threadedly connected to the limiting bolt 205 , and one end of the limiting bolt 205 is plugged into the surface of the arc-shaped positioning plate 203 .

[0043] When in use, the limiting bolt 205 cooperates with the limiting block 204 to adjust the limiting length of the limiting bolt 205, and one end of the limiting bolt 205 is plugged into the surface of the arc positioning plate 203 to limit the support angle of the arc positioning plate 203.

[0044] The other end of the positioning link plate 202 is rotatably connected to the supporting link plate 206 via a pin shaft, and one end of the supporting link plate 206 is rotatably connected to the jacking support platform 207 via a pin shaft. The upper surface of the jacking support platform 207 is fixedly connected to a conical sleeve 208, and the top of the conical sleeve 208 is fixedly connected to a guide rod 209.

[0045] A lifting hydraulic cylinder 210 is fixedly connected to the upper surface of the load-bearing support platform 201 . The lifting hydraulic cylinder 210 includes a lifting hydraulic rod 211 . One end of the lifting hydraulic rod 211 is fixedly connected to the lower surface of the lifting support platform 207 .

[0046] When in use, the lifting hydraulic rod 211 extends from the lifting hydraulic cylinder 210, driving the lifting support platform 207 to move upward, driving the supporting connecting plate 206 to move upward, and the supporting connecting plate 206 drives the positioning connecting plate 202 to move, driving the arc positioning plate 203 to move outward and open. After the three arc positioning plates 203 are opened, they are consistent with the diameter of the pile foundation steel pipe, so that it is convenient to connect the anti-anchor bolts of the casing bottom plate during the hoisting and assembly process to position and guide the casing bottom plate.

[0047] The surface of the arc-shaped positioning plate 203 is rotatably connected to an adjusting hydraulic cylinder 212 via a pin shaft. The adjusting hydraulic cylinder 212 includes an adjusting hydraulic rod 213. One end of the adjusting hydraulic rod 213 is fixedly connected to a rotating seat 214. The inner wall of the rotating seat 214 is rotatably connected to the surface of the positioning connecting plate 202 via a pin shaft.

[0048] When in use, the length of the hydraulic rod 213 extending from the hydraulic cylinder 212 is controlled to control the verticality of the arc-shaped positioning plate 203 to the horizontal, thereby ensuring better assembly and installation of the casing bottom plate.

[0049] Furthermore, when the positioning and guiding mechanism is performing hoisting and guiding on the casing bottom plate, the three arc-shaped positioning plates 203 are first adjusted according to the diameter of the steel pipe pile, so that the three arc-shaped positioning plates 203 form a guiding cover consistent with the outer diameter of the steel pipe pile.

[0050] During the adjustment process, the lifting hydraulic rod 211 is first extended from the lifting hydraulic cylinder 210 to drive the lifting support platform 207 to move upward, drive the supporting connecting plate 206 to move upward, and the supporting connecting plate 206 drives the positioning connecting plate 202 to move, and drives the arc positioning plate 203 to move outward and open. After the three arc positioning plates 203 are opened, they are consistent with the diameter of the pile foundation steel pipe, and the limiting bolt 205 cooperates with the limiting block 204 to adjust the limiting length of the limiting bolt 205, and one end of the limiting bolt 205 is plugged into the surface of the arc positioning plate 203 to limit the support angle of the arc positioning plate 203, and the verticality of the arc positioning plate 203 to the horizontal is controlled by controlling the length of the adjusting hydraulic rod 213 extending from the adjusting hydraulic cylinder 212.

[0051] When the casing bottom plate is hoisted, the sleeve hole groove opened on the casing bottom plate is sleeved with the guide rod 209, and then moves downward. After being guided by the conical sleeve 208 and contacting the arc positioning plate 203, the positioning sleeve 2 composed of three arc positioning plates 203 is slidably connected to the inner wall of the sleeve hole groove, so as to position and guide the casing bottom plate for downward movement and docking assembly.

[0052] Step 5: Lifting construction: lift the partitioned casings one by one. During the lifting construction process, in order to avoid conflict between the wire rope and the steel pipe piles, the top of the steel pipe piles needs to be cut to the designed elevation of the bottom of the pedestal before lifting the casings.

[0053] Furthermore, the crawler crane hook adopts a double-groove hook, and the wire rope and the lifting ring are connected by a shackle.

[0054] Step 6: Install the anti-anchor bolts. After hoisting the casing bottom plate to fit the pile foundation, use the anti-anchor bolts to connect it to the embedded parts of the pile foundation corbel top plate at the predetermined points on the casing bottom plate.

[0055] By setting steps one to six, when in use, the large eccentric casing bottom plate is divided into three areas A, B, and C, which are hoisted and assembled in batches, and the casing assembly is guided and positioned on the casing bottom plate by a positioning and guiding mechanism to ensure that the casing bottom plate and the corbel anti-anchor bolts are accurately and quickly connected, thereby solving the problems of existing manual positioning and extensive connection technology, such as large positioning errors, difficulty in ensuring connection strength, and long construction period.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A precise connection method between the large eccentric casing bottom plate anti-anchor bolt and the pile foundation bracket top plate, characterized in that: The following steps are involved: Step 1: Construction of bottom plate supporting steel brackets. The steel bracket structure is cut and processed in the steel bar yard and welded on site according to the design drawing requirements. Step 2: Divide the large eccentric casing bottom plate into three areas: A, B, and C, and prefabricate them at the onshore prefabrication site; Step 3: Positioning of embedded parts: Before pouring the top plate of the pile foundation corbel, accurately embed the positioning parts; Step 4: Install the positioning guide mechanism in the installation area to perform hoisting, docking and positioning installation on the bottom plate of the casing; Step 5: Hoisting construction, hoist the partitioned boxes one by one; Step 6: Install the anti-anchor bolts. After hoisting the casing bottom plate to fit the pile foundation, use the anti-anchor bolts to connect it to the embedded parts of the pile foundation corbel top plate at the predetermined points on the casing bottom plate.

2. The method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate according to claim 1 is characterized in that: When welding the steel corbels on site in step 1, first carry out the construction of the bottom welding operation platform. The construction platform is welded 1.9m below the bottom of the base plate. The platform is welded to the side wall of the pile foundation steel casing with ∠60 angle steel to form a triangular steel frame. T16 steel bars are welded on the steel frame, and wooden boards are laid as the construction platform. A 1.5m high green safety net is hung on the outside of the platform to protect the safety of operators.

3. The method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate according to claim 1 is characterized in that: The positioning member in step 3 is a positioning function rod (1) that is perpendicular to the top plane of the pile foundation at 90 degrees. The nine positioning function rods (1) are distributed in a triangular shape at the installation positions of the bottom plates of the three zones A, B and C.

4. The method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate according to claim 3 is characterized by: The positioning guide mechanism in step four includes a positioning sleeve (2), the inner wall of the positioning sleeve (2) is slidably connected to the surface of the positioning function rod (1), the top of the positioning sleeve (2) is fixedly connected to a load-bearing support platform (201), the inner wall of the load-bearing support platform (201) is rotatably connected to a positioning connecting plate (202) via a pin shaft, and three positioning connecting plates (202) are distributed in a circular array with the axis of the load-bearing support platform (201) as the center.

5. The method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate according to claim 4 is characterized in that: The surface of the positioning connecting plate (202) is in a 7-shaped shape. One end of the positioning connecting plate (202) is rotatably connected to an arc-shaped positioning plate (203) via a pin shaft. The lower surface of the arc-shaped positioning plate (203) is slidably connected to the surface of the casing bottom plate.

6. The method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate according to claim 5 is characterized in that: A limiting block (204) is fixedly connected to the surface of the positioning connecting plate (202) close to the arc-shaped positioning plate (203), a limiting bolt (205) is threadedly connected to the surface of the limiting block (204), and one end of the limiting bolt (205) is plugged into the surface of the arc-shaped positioning plate (203).

7. The method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate according to claim 6 is characterized in that: The other end of the positioning connecting plate (202) is rotatably connected to the supporting connecting plate (206) via a pin shaft, and one end of the supporting connecting plate (206) is rotatably connected to the jacking support platform (207) via a pin shaft. The upper surface of the jacking support platform (207) is fixedly connected to a conical sleeve (208), and the top of the conical sleeve (208) is fixedly connected to a guide rod (209).

8. The method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate according to claim 7 is characterized in that: A lifting hydraulic cylinder (210) is fixedly connected to the upper surface of the load-bearing support platform (201), and the lifting hydraulic cylinder (210) comprises a lifting hydraulic rod (211), and one end of the lifting hydraulic rod (211) is fixedly connected to the lower surface of the lifting support platform (207).

9. The method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate according to claim 8 is characterized in that: The surface of the arc-shaped positioning plate (203) is rotatably connected to an adjusting hydraulic cylinder (212) via a pin shaft, and the adjusting hydraulic cylinder (212) comprises an adjusting hydraulic rod (213), one end of which is fixedly connected to a rotating seat (214), and the inner wall of the rotating seat (214) is rotatably connected to the surface of the positioning connecting plate (202) via a pin shaft.

10. The method for accurately connecting the large eccentric casing bottom plate anti-anchor bolts and the pile foundation bracket top plate according to claim 1 is characterized in that: During the hoisting construction process of step 5, in order to avoid conflict between the wire rope and the steel pipe pile, the top of the steel pipe pile needs to be cut to the designed elevation of the bottom of the cap before the casing is hoisted.

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