Construction method for arrangement of large-diameter slide-resistant pile reinforcement cage

Abstract

The invention discloses a construction method, particularly discloses a construction method for arranging a large-diameter slide-resistant pile reinforcement cage, and belongs to the technical field of road engineering slide-resistant pile construction processes. According to the construction method for arranging the large-diameter slide-resistant pile reinforcement cage, construction operation is convenient, the construction safety coefficient is high, and the arranged reinforcement cage is not prone to deformation. The construction method comprises the steps that a supporting frame and hoisting equipment are arranged at a hole opening of a formed pile hole, then the hoisting equipment arranged on the supporting frame serves as a hoisting foundation, and on-site manufacturing and on-site installation of a reinforcement cage needing to be arranged are completed in the sequence that the reinforcement cage is manufactured section by section and lowered section by section from bottom to top. And the whole reinforcement cage is completely arranged in the formed pile hole.

Description

Technical Field

[0001] The invention relates to a construction method, in particular to a construction method for arranging a large-diameter anti-slide pile reinforcement cage, and belongs to the technical field of anti-slide pile construction technology for road engineering. Background Art

[0002] With the continuous expansion of the scale and speed of road traffic construction in my country, roadbed protection and support engineering has become a very important construction link. During the construction process, the assembly and hoisting of steel cages is one of the key processes of the entire anti-slip pile project. The construction of steel cages plays a key role in determining the completion of subsequent construction processes in the anti-slip pile protection and support project.

[0003] At present, the commonly used construction methods in China are to prefabricate the steel cage in the steel processing plant, use hoisting equipment to hoist it into the anti-slip pile hole, or use the anti-slip pile hole to manually assemble the steel cage. In addition, the large-diameter anti-slip pile steel cage has a large deadweight, and the hoisting construction process can easily cause the steel cage to deform to varying degrees. The construction operation in the artificial hole is cumbersome and the safety factor is low. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a construction method for arranging steel cages for large-diameter anti-sliding piles, which has the advantages of convenient construction operation, high construction safety factor and not easy deformation of the arranged steel cages.

[0005] The technical solution adopted to solve the above technical problems is: a construction method for arranging a large-diameter anti-sliding pile steel cage, the construction method first arranges a support frame and a lifting equipment at the hole mouth of the formed pile hole, and then uses the lifting equipment arranged on the support frame as the lifting basis, and completes the on-site production and installation of the steel cage in the order of manufacturing and lowering sections from bottom to top until the entire steel cage is completely arranged in the formed pile hole.

[0006] Furthermore, before arranging the support frame, the opening of the formed pile hole is first locked by pouring concrete, and at least two groups of embedded bolts are embedded in the process of pouring concrete, and then the support frame is locked on the opening of the formed pile hole by the embedded bolts.

[0007] A preferred embodiment of the above scheme is that the support frame is a lantern-shaped welded steel support truss, and the welded steel support truss includes at least two work surfaces in the vertical direction. The bottom work surface is a construction operation table for welding main steel bars and tying transverse steel bars to the main steel bars. Based on the bottom work surface, at least one assembly work surface is included upward for inserting vertical main steel bars from top to bottom during construction; and a guardrail is arranged at least on the outside of the assembly work surface along the circumferential direction.

[0008] Furthermore, a main reinforcement assembly positioning hole plate is provided in the middle and upper part of the welded steel support truss. When the main reinforcement is inserted from top to bottom in the vertical direction, the geometric position of each main reinforcement is determined by the main reinforcement assembly positioning hole plate.

[0009] The preferred embodiment of the above scheme is that the lifting equipment includes at least two winches with a lifting weight of not less than 5T, and each winch is symmetrically arranged in the middle and upper part of the welded steel support truss. Each winch is movably connected to the top of each section of the steel cage in the production process through the pulley block on its power output end.

[0010] Furthermore, before pouring concrete to lock the hole mouth of the formed pile hole, it is necessary to first conduct a quality inspection of the formed pile hole. After the verticality, hole diameter, hole wall protrusions and sediment accumulation layer of the formed pile hole meet the specification requirements, concrete pouring can be carried out to complete the locking construction.

[0011] The preferred method of the above scheme is that the steel cage is manufactured and arranged on site according to the following steps:

[0012] 1) The construction workers on the lantern frame assembly work surface wear safety protection equipment, lower the main reinforcement of the steel cage from the comb holes of the main reinforcement assembly positioning hole plate pre-set on the assembly work surface, and connect the main reinforcement according to the design requirements;

[0013] 2) After the main steel bars are lowered, the construction workers on the bottom work surface weld the main steel bars and the parts that need to be welded, and then tie the stirrups, and temporarily fix and support the four corners of the first section of the steel cage. Two 32mm diameter threaded steel bars are used to temporarily fix each corner of the steel cage;

[0014] 3) After the specified length of the steel cage is processed, start the winch, take out the temporary fixed supports at the four corners of the steel cage, lower the steel cage, and add temporary fixed supports at the four corners of the steel cage after the steel cage is lowered into place;

[0015] 4) Then repeat the construction process of steps 1-3 above until the construction of the steel cage meets the design requirements. After the last section of the steel cage is lowered, the temporary fixed supports at the four corners of the steel cage are retained and turned into permanent fixed supports. The steel bars are back-welded by welding to complete the on-site production and installation of the steel cage.

[0016] Furthermore, after the steel cage is arranged, tested and properly fixed, the anti-sliding pile concrete is poured.

[0017] The preferred embodiment of the above scheme is that the main frame of the welded steel support truss is composed of 20 cm I-beams, the scissors braces between adjacent main frames are composed of 5 cm angle steels, and the projection of the welded steel support frame composed of the main frame and the scissors braces in the horizontal plane is a regular quadrilateral, regular pentagon or regular hexagon.

[0018] Furthermore, the winch is welded to the middle and upper part of the welded steel support truss through a 10 cm I-beam support.

[0019] The beneficial effect of the present invention is as follows: the technical solution provided by the present application first arranges the support frame and the lifting equipment at the hole of the formed pile hole, and then takes the lifting equipment arranged on the support frame as the lifting basis, and adopts the order of making and lowering the steel cage from bottom to top in sections to complete the on-site production and installation of the steel cage, until the entire steel cage is completely arranged in the formed pile hole. The technical problem that the steel cage of the anti-sliding pile in the prior art is either made and hoisted on site in the factory, which causes the steel cage to be easily deformed, or is made directly in the anti-sliding pile hole, and the safety is not guaranteed, and safety accidents are prone to occur is solved. The above-mentioned technical solution of the present application is adopted. Since the hole of the anti-sliding pile forming hole is made and lowered from bottom to top in sections based on the support frame and the lifting equipment, the construction operation is all at the hole of the formed pile hole, and no person needs to enter the pile hole for construction, and there is no overall lifting operation of the steel cage, so that not only the construction operation is convenient, the construction safety factor is high, and the arranged steel cage is not easy to deform, while ensuring the layout quality, the layout efficiency can be improved, and the production cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the arrangement of a support frame and a hoisting device involved in the construction method for arranging a large-diameter anti-sliding pile reinforcement cage of the present invention;

[0021] Figure 2 for Figure 1 Top view of the .

[0022] Marked in the figure are: formed pile hole 1, support frame 2, steel cage 3, assembly work surface 4, guardrail 5, main steel bar assembly positioning hole plate 6, winch 7. DETAILED DESCRIPTION

[0023] like Figure 1 , Figure 2The present invention provides a construction method for arranging steel cages for large-diameter anti-sliding piles, which is convenient to operate, has a high safety factor, and the arranged steel cages are not easily deformed. The construction method first arranges a support frame 2 and a lifting device at the opening of the formed pile hole 1, and then uses the lifting device arranged on the support frame 2 as the lifting basis, and uses the order of manufacturing and lowering sections from bottom to top for the steel cages 3 to be arranged to complete the on-site manufacture and installation of the steel cages 3, until the entire steel cage is completely arranged in the formed pile hole. The technical solution provided in the present application first arranges a support frame and a lifting device at the opening of the formed pile hole, and then uses the lifting device arranged on the support frame as the lifting basis, and uses the order of manufacturing and lowering sections from bottom to top for the steel cages to be arranged to complete the on-site manufacture and installation of the steel cages, until the entire steel cage is completely arranged in the formed pile hole. The invention solves the technical problem that the steel cage of the anti-sliding pile in the prior art is either manufactured in the factory and hoisted on site, which causes the steel cage to be easily deformed, or is directly manufactured in the anti-sliding pile hole, which makes the safety not guaranteed and is prone to safety accidents. The above-mentioned technical scheme of the present application is adopted. Since the hole of the anti-sliding pile hole is manufactured and lowered from bottom to top based on the support frame and the hoisting equipment, all construction operations are carried out at the hole of the formed pile hole. There is no need for people to enter the pile hole for construction, and there is no overall hoisting operation of the steel cage. Therefore, not only the construction operation is convenient, the construction safety factor is high, but also the arranged steel cage is not easy to deform, which ensures the layout quality and improves the layout efficiency and reduces the production cost. Accordingly, in order to improve the stability of the assembly process, the present application first locks the hole of the formed pile hole by pouring concrete before arranging the support frame 2, and pre-buries at least two sets of embedded bolts during the pouring of concrete, and then locks the support frame 2 on the hole of the formed pile hole by the embedded bolts.

[0024] As the main component improved in this application, in order to improve its operability and ensure the manufacturing quality of the steel cage, the support frame 2 of this application is a lantern-shaped welded steel support truss. The welded steel support truss includes at least two work surfaces in the vertical direction. The bottom work surface is a construction operation table for welding the main steel bars and tying the transverse steel bars to the main steel bars. Based on the bottom work surface, it includes at least one assembly work surface 4 for inserting the vertical main steel bars from top to bottom for construction; guardrails 5 are arranged at least on the outside of the assembly work surface 4 along the circumferential direction. The hoisting equipment includes at least two winches 7 with a lifting weight of not less than 5T. Each winch 7 is symmetrically arranged in the middle and upper part of the welded steel support truss. Each winch 7 is movably connected to the top of each section of the steel cage 3 in the manufacturing process through the pulley block on its power output end.

[0025] More specifically, the present application further provides a main steel bar assembly positioning hole plate 6 in the middle and upper part of the welded steel support truss. When the main steel bars are inserted from top to bottom in the vertical direction, the geometric position of each main steel bar is determined by the main steel bar assembly positioning hole plate 6. The main frame of the welded steel support truss is composed of 20cm I-beams, and the scissor braces between adjacent main frames are composed of 5cm angle steels. The projection of the welded steel support frame composed of the main frame and the scissor braces in the horizontal plane is a regular quadrilateral, regular pentagon or regular hexagon. The winch 7 is welded to the middle and upper part of the welded steel support truss through a 10cm I-beam support.

[0026] Accordingly, in order to ensure the quality of the arrangement of the steel cage and thus the quality of the anti-sliding pile itself, the quality of the formed pile hole 1 needs to be checked before pouring concrete to lock the hole of the formed pile hole. After the verticality, hole diameter, protruding points of the hole wall and sediment accumulation layer of the formed pile hole 1 meet the standard requirements, the concrete pouring can be completed to complete the locking construction. And after the steel cage is arranged, tested and fixed properly, the anti-sliding pile concrete can be poured.

[0027] More specifically, the present application is carried out according to the following steps when making and arranging the steel cage on site:

[0028] 1) The construction workers on the lantern frame assembly work surface wear safety protection equipment, lower the main reinforcement of the steel cage from the comb holes of the main reinforcement assembly positioning hole plate pre-set on the assembly work surface, and connect the main reinforcement according to the design requirements;

[0029] 2) After the main steel bars are lowered, the construction workers on the bottom work surface weld the main steel bars and the parts that need to be welded, and then tie the stirrups, and temporarily fix and support the four corners of the first section of the steel cage. Two 32mm diameter threaded steel bars are used to temporarily fix each corner of the steel cage;

[0030] 3) After the specified length of the steel cage is processed, start the winch, take out the temporary fixed supports at the four corners of the steel cage, lower the steel cage, and add temporary fixed supports at the four corners of the steel cage after the steel cage is lowered into place;

[0031] 4) Then repeat the construction process of steps 1-3 above until the construction of the steel cage meets the design requirements. After the last section of the steel cage is lowered, the temporary fixed supports at the four corners of the steel cage are retained and turned into permanent fixed supports. The steel bars are back-welded by welding to complete the on-site production and installation of the steel cage.

[0032] In summary, in order to solve the above-mentioned problems existing in the existing construction, this application has developed a "lantern frame" device for placing a large-diameter anti-slip pile steel cage on site through theoretical research and on-site process application summary, and designed the device into a rectangular cuboid or a polygonal cube. This device can directly carry out steel cage construction at the large-diameter anti-slip pile hole mouth and can lower the steel cage into the hole during construction. The construction personnel assemble and weld the steel bars at the anti-slip pile locking position. After part of the construction is completed, the winches on both sides of the top of the device can be used to lower the steel cage to a certain position, and then continue to assemble and weld the steel cage. This reciprocating process can complete the processing and hoisting construction of the anti-slip pile steel cage. The construction personnel are all working at the hole mouth to avoid entering the hole for construction, which greatly enhances production safety work and avoids damage and deformation of the heavy-weight steel cage during transportation.

[0033] From the perspective of project construction benefits, in the construction of the anti-sliding piles at K41+000-K41+300 of a certain tree dam in the tenth work area of ​​a certain highway project, if the steel cage is constructed by general manual or prefabricated methods, the risk factor of high-altitude operations is relatively high; if the prefabricated steel cage is used, the damage and deformation of the steel cage is inevitable, affecting the overall project quality; while the lantern rack device is used for construction, the construction safety risk factor is relatively small, and the investment in other safety measures is greatly reduced. At the same time, the use of this device fully guarantees the safety of construction personnel and greatly reduces the expenditure of safety production costs. The practical effect is significant, which strengthens the safety and civilized construction on site, and the cost of making the lantern rack is relatively low, which reduces various safety production costs such as ventilation gas detection required for previous in-hole construction, and it can be reused. This has positive practical significance for safe operation, reducing construction cost investment, and ensuring that the construction schedule is carried out effectively according to plan.

[0034] From the perspective of social benefits, the technical solution of this application is adopted to ensure the safety of construction personnel by constructing and hoisting the steel cage through the lantern frame, control the quality of the steel cage well, and avoid the construction method with greater danger of personnel entering the anti-slip pile hole to the greatest extent, so that the personnel are well protected. It meets the requirements of the owner and related parties, ensures safety and reduces costs. It has been fully recognized by the owner, enhanced the reputation of the construction unit, and effectively improved the social benefits and core competitiveness of the construction unit in the market.

[0035] The technical solution of the present application is further described below through specific embodiments:

[0036] The process flow of anti-sliding pile reinforcement cage processing and hoisting is as follows:

[0037] Anti-slip pile lock construction → Pre-embed lantern frame anchor bolts before anti-slip pile lock concrete pouring → Anti-slip pile wall protection construction → Anti-slip pile hole acceptance → Lantern frame hoisted into the embedded parts and fixed with bolts → Lower the main reinforcement on the upper working surface of the lantern frame, the main reinforcement on the lower working surface, and tie the stirrups → Lower the steel cage with the winch, and use 2Φ32 threaded steel bars at each corner to temporarily fix the steel cage → Repeat the steel cage construction work until the steel cage meets the design requirements → Release the fixation of the anchor bolt embedded parts and the lantern frame → Lift the lantern frame → Anti-slip pile concrete pouring.

[0038] The main frame of the lantern stand is made of 20cm I-beam, the bottom of the column is anchored with embedded bolts into the lock, the scissors support is connected with 5cm angle steel, two 5-ton winches and 2 sets of pulleys are installed on the top, and the winch base is welded with 10cm I-beam.

[0039] This technology concentrates the construction and hoisting steps of the steel cage in one place, and directly processes the steel cage at the mouth of the anti-slip pile. The construction workers do not need to enter the anti-slip pile hole for construction. The device is divided into two working surfaces. The construction workers on the upper working surface will lower the vertical main reinforcement to the lower working surface according to the pre-designed steel bar size positioning hole. When encountering mechanical connection parts, the upper construction workers can directly connect and lower the steel bars. The construction workers on the lower working surface can directly weld the main bars, locate and install the stirrups, and tie them. The construction workers can operate conveniently and quickly. After a certain length of steel cage is processed, the winch on the lantern frame will work to lower the steel cage. After the lowering is completed, the steel cage will be temporarily fixed to enhance the stability of the steel cage. This process is repeated until the construction of the anti-slip pile steel cage is completed and the next step of the process is carried out.

[0040] The arrangement of construction equipment in anti-slip pile construction needs to be carried out according to the construction design requirements of the construction. In order to ensure the effective implementation of the anti-slip pile steel cage construction, the construction personnel should carefully study the construction drawings before construction. Because the large-diameter anti-slip pile steel cage has a large self-weight and the lantern frame has high load-bearing capacity requirements, preventive measures should be taken for problems that may be encountered during construction.

[0041] During the construction process of this technology, since the lantern frame does not require construction workers to enter the anti-slip pile hole for construction, the use of this technology greatly reduces the risk of falling from heights and saves labor costs.

[0042] In order to provide a safer steel cage construction environment and a faster method, before construction, the technical staff conducted actual surveys and analyses of the construction site. After continuous exploration, they finally developed a lantern frame device to solve the above problems, which has been fully verified in actual application projects. From the actual construction of the anti-sliding piles at K41+000-K41+300 of a certain tree dam in the tenth work area of ​​a certain highway project, the use of lantern frames for the construction of anti-sliding pile steel cages makes the operation process safer and reduces the possibility of deformation of large steel cages. This has positive practical significance for better controlling construction safety, reducing the occurrence of high-altitude falling accidents, reducing construction cost investment, and ensuring that the construction schedule is carried out effectively as planned.

[0043] Embodiment 1

[0044] 1) Before construction, reasonable planning is required first. The size of the lantern frame is determined according to the designed diameter of the anti-slip pile and the lock of the anti-slip pile. Generally, the inner diameter is designed to be the same size as the pile diameter. The main frame of the lantern frame is made of 20cm I-beam, and the bottom of the column is anchored into the lock with embedded bolts. The scissors support is connected with 5cm angle steel. Two 5-ton winches and 2 sets of pulleys are installed on the top. The winch base is welded with 10cm I-beam. The lantern frame is made according to the drawings, and the winch and other mechanical circuits have been tested and are operating normally.

[0045] 2) Hang the lantern frame at the anti-slip pile lock position where the steel cage construction will be carried out, and fix the lock embedded bolts into the bolt holes at the four corners of the lantern frame, and connect the electrical circuit required for the lantern frame.

[0046] 3) Construction workers on the upper working surface of the lantern frame wear safety protection equipment, lower the main reinforcement of the steel cage from the pre-set main reinforcement lowering comb on the upper working surface, and connect the main reinforcement according to the design requirements.

[0047] 4) After the main reinforcement of the upper working surface is lowered, the construction workers of the lower working surface will weld the main reinforcement and the parts that need to be welded, tie the stirrups, and temporarily fix and support the four corners of the initially completed steel cage. Two 32 diameter threaded steel bars are used to temporarily fix the steel cage at each corner.

[0048] 5) After a certain length of steel cage is processed, start the winch, take out the temporary fixed supports at the four corners of the steel cage, lower the steel cage, and add temporary fixed supports at the four corners of the steel cage after lowering.

[0049] 6) The subsequent process cycle 2-5 construction steps until the steel cage construction meets the design requirements. After the last section of the steel cage is lowered, the temporary fixed supports at the four corners are no longer removed. They are replaced with permanent fixed supports using back-welded steel bars to strengthen the support system.

[0050] 7) After the permanent support is fixed, disconnect the winch from lifting the steel cage, disconnect the electrical circuit of the lantern frame, loosen the connection of the embedded bolts at the four corners of the lantern frame, and move the lantern frame away.

[0051] 8) Anti-slide pile concrete pouring and other subsequent work.

Claims

1. A construction method for arranging a large diameter anti-sliding pile reinforcement cage, characterized in that: The construction method first arranges a support frame (2) and a lifting device at the opening of a formed pile hole (1), then uses the lifting device arranged on the support frame (2) as a lifting basis, and adopts a sequence of manufacturing and lowering sections from bottom to top to complete the on-site manufacturing and on-site installation of the steel cage (3) to be arranged, until the entire steel cage is completely arranged in the formed pile hole.

2. The construction method for arranging large-diameter anti-sliding pile reinforcement cage according to claim 1, characterized in that: Before arranging the support frame (2), the opening of the formed pile hole is first locked by pouring concrete, and at least two groups of embedded bolts are embedded in the process of pouring concrete, and then the support frame (2) is locked on the opening of the formed pile hole by the embedded bolts.

3. The construction method for arranging a large-diameter anti-sliding pile reinforcement cage according to claim 1 or 2, characterized in that: The support frame (2) is a lantern-shaped welded steel support truss, which includes at least two work surfaces in the vertical direction, wherein the bottom work surface is a construction operation table surface for welding main steel bars and tying transverse steel bars to the main steel bars, and based on the bottom work surface, it includes at least one assembly work surface (4) for inserting vertical main steel bars from top to bottom during construction; and a guardrail (5) is arranged at least on the outer side of the assembly work surface (4) in the circumferential direction.

4. The construction method for arranging large-diameter anti-sliding pile reinforcement cages according to claim 3 is characterized in that: A main steel bar assembly positioning hole plate (6) is also provided in the middle and upper part of the welded steel support truss. When the main steel bars are inserted from top to bottom in the vertical direction for assembly, the geometric positions of the main steel bars are determined by the main steel bar assembly positioning hole plate (6).

5. The construction method for arranging large-diameter anti-sliding pile reinforcement cages according to claim 4 is characterized in that: The hoisting equipment comprises at least two winches (7) each with a hoisting weight of not less than 5 tons. Each winch (7) is symmetrically arranged at the middle and upper part of the welded steel support truss. Each winch (7) is movably connected to the top of each section of the steel cage (3) in the manufacturing process through a pulley block on its power output end.

6. The construction method for arranging large-diameter anti-sliding pile reinforcement cages according to claim 5, characterized in that: Before pouring concrete to lock the hole mouth of the formed pile hole, the formed pile hole (1) needs to be quality checked. After the verticality, hole diameter, hole wall protrusions and sediment accumulation layer of the formed pile hole (1) meet the standard requirements, concrete pouring can be carried out to complete the locking construction.

7. The construction method for arranging large-diameter anti-sliding pile reinforcement cages according to claim 6, characterized in that: The following steps are followed when making and arranging the steel cage on site: 1) The construction workers on the lantern frame assembly work surface wear safety protection equipment, lower the main reinforcement of the steel cage from the comb holes of the main reinforcement assembly positioning hole plate pre-set on the assembly work surface, and connect the main reinforcement according to the design requirements; 2) After the main steel bars are lowered, the construction workers on the bottom work surface weld the main steel bars and the parts that need to be welded, and then tie the stirrups, and temporarily fix and support the four corners of the first section of the steel cage. Two 32mm diameter threaded steel bars are used to temporarily fix each corner of the steel cage; 3) After the specified length of the steel cage is processed, start the winch, take out the temporary fixed supports at the four corners of the steel cage, lower the steel cage, and add temporary fixed supports at the four corners of the steel cage after the steel cage is lowered into place; 4) Then repeat the construction process of steps 1-3 above until the construction of the steel cage meets the design requirements. After the last section of the steel cage is lowered, the temporary fixed supports at the four corners of the steel cage are retained and turned into permanent fixed supports. The steel bars are back-welded by welding to complete the on-site production and installation of the steel cage.

8. The construction method for arranging large-diameter anti-sliding pile reinforcement cages according to claim 7, characterized in that: After the steel cage is arranged, tested and properly fixed, the anti-sliding pile concrete can be poured.

9. The construction method for arranging large-diameter anti-sliding pile reinforcement cages according to claim 3, characterized in that: The main frame of the welded steel support truss is composed of 20cm I-beams, and the scissors braces between adjacent main frames are composed of 5cm angle steels. The projection of the welded steel support frame composed of the main frame and the scissors braces in the horizontal plane is a regular quadrilateral, regular pentagon or regular hexagon.

10. The construction method for arranging large diameter anti-sliding pile reinforcement cages according to claim 9, characterized in that: The hoist (7) is welded to the middle and upper part of the welded steel support truss through a 10 cm I-beam support.

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