Large-span rod piece traction sliding jacking installation method

Abstract

A large-span rod piece traction, sliding and jacking installation method comprises the steps that a rail fulcrum is arranged at the position to be installed, namely near a bracket of a main body structure, an auxiliary rail fulcrum is arranged according to the length of a large-span rod piece, namely, a reserved soil body is arranged, and the large-span rod piece supported between the rail fulcrum and the auxiliary rail fulcrum is transferred in combination with a pile plate machine in a rolling mode; the large-span rod piece is installed on a projection line of a position to be installed, then the large-span rod piece is inclined through combination of a sheet pile machine and a simple portal frame, meanwhile, latticed columns are adopted for auxiliary supporting, after prestress is applied, the large-span rod piece and a reserved steel plate on a bracket of a main body structure are welded and fixed, installation of the large-span rod piece is completed, and large hoisting instruments do not need to be adopted in the period. And the defect that the traditional hoisting method is difficult to hoist at the limited part of the construction operation is overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building construction, in particular to a large-span rod traction sliding jacking installation method. BACKGROUND

[0002] With the development of the construction industry, the foundation pit support of buildings is also more variable in form. Many projects with existing buildings on the edge will adopt the form of steel pipe bracing support. When the gap between the underground edge of the construction project and the permanent support is too narrow and too long, and steel pipe support construction needs to be carried out in this suspended space, the safety and stability of the bracing support between the underground structure and the adjacent building is a big problem, especially for narrow working surface with large span, the limited site conditions hinder the lifting and installation.

[0003] Nowadays, the traditional lifting and installation method is to segmentally lift the steel support in situ, and to complete the installation by assembling in the air. The disadvantage of this method is that the steel support assembly height is large, the high-altitude operation risk is high, and the lifting progress of each component is slow. In addition, the large tonnage of the crane and the large amount of scaffold materials will increase the construction cost. SUMMARY

[0004] The purpose of the present application is to provide a large-span rod traction sliding jacking installation method, which adopts a method of assembling first and then transporting to the installation position for installation. The process does not use large lifting equipment, and solves the problems mentioned in the background art.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: A large-span rod traction sliding jacking installation method, the total length of the large-span rod is more than 20m, and the large-span rod is connected obliquely between the top plate of the basement and the waist beam of the support pile, characterized in that: the large-span rod installation process comprises the following steps: S1. Measurement and setting out: measuring and setting the installation plane position and elevation of the large-span rod according to the design drawing; S2. Setting up the large-span rod assembly site: flattening and compacting the ground beside the foundation pit, and setting up a temporary steel pipe support yard by surrounding the steel pipe; S3. Track installation: setting up a concrete corbel on the top plate of the basement, planting a tendon on the top surface of the concrete corbel, and welding double-spliced I-beams on the tendon. The double-spliced I-beams are connected by connecting rods, the connecting rods are connected end to end to form a guide rail, the top surface of the guide rail is flush with the top surface of the reserved soil body, and the reserved soil body is located in the foundation pit inside the support pile; S5. Large-span rod hoisting: after the large-span rod is assembled, the automobile crane is used to hoist it from the assembly point to the starting point of the guide rail, the automobile crane legs are kept at a safe distance from the edge of the foundation pit, and a steel plate is set up for unloading; S6. Large-span rod transfer: one end of the large-span rod is placed on the guide rail, the other end is supported on the reserved soil, a steel wire rope is wound around the end of the large-span rod close to the reserved soil, the steel wire rope is pulled upward by the pile board machine clamp to pull, the large-span rod is rotated and rolled forward, the angle between the large-span rod and the guide rail is observed manually during pulling to ensure that the speeds of the two ends are the same, after transportation and positioning, the large-span rod is blocked with wooden boards to prevent rolling; S7. Large-span rod end fixing: combining the pile board machine and the simple gantry set on the basement roof, the end of the large-span rod close to the supporting pile is lifted, the guide rail is removed, the large-span rod is placed on the concrete bracket, and the end of the large-span rod is supported on the electric hoist on the simple gantry; The height of the large-span rod is adjusted by the pile board machine on the reserved soil side, and the loose joint is fixed so that it is located on the installed projection line, then the large-span rod is slowly lifted, the end of the large-span rod on the basement roof side is slid to connect with the bracket of the main structure, then it is lifted to the corresponding elevation of the waist beam, and a temporary support plate is welded under the connecting plate between the loose joint and the waist beam; S8. Pre-stress application: after the large-span rod is supported and positioned, pre-stress is applied to the loose joint by the hydraulic jack to make both ends of the loose joint tightly contact with the bracket of the main structure and the waist beam, the end of the large-span rod is welded with the reserved steel plate of the bracket of the main structure, and is tightly wedged with a steel wedge, finally, the large-span rod is sampled for axial force detection according to the design requirements.

[0006] Further preferably, step S1 further comprises a plurality of lattice columns installed in the foundation pit between the basement roof and the reserved soil along the direction of the interval of the plurality of large-span rods, the lattice columns are arranged on the projection line of the large-span rods, the plurality of lattice columns are connected by a connecting beam, the top surface elevation of the lattice column is less than or equal to the top surface elevation of the guide rail, and the guide rail, the reserved soil and the lattice column jointly support the large-span rod.

[0007] Further, after the temporary fixing of the large-span rod in step S7, the lattice column is connected to the waist of the large-span rod, and the bracket of the steel support at the lattice column is welded.

[0008] Further, after the lattice column is connected in step S7, a safety steel wire rope is arranged at the crown beam, one end of the safety steel wire rope is fixed with a steel wire ring embedded on the crown beam, and the other end is sleeved on the end of the large-span rod.

[0009] In addition, the simple gantry in step S7 is correspondingly arranged with the bracket of the main structure, and is arranged on the bracket of the main structure and the concrete bracket, the bracket of the main structure is provided with an electric hoist for assisting the installation of the large-span rod.

[0010] More preferably, step S2 further comprises segmentally assembling the large-span rod member at the steel pipe support temporary yard, and the steel pipe support lengthening adopts a flange plate connecting plate and high-strength bolts, and the flange plates between the steel pipe supports are connected by 16 high-strength bolts with a diameter of 24 mm and a length of 90 mm.

[0011] Compared with the prior art, the present application has the following characteristics and beneficial effects: The present application sets track support points near the corbel of the main structure in the position to be installed, sets auxiliary track support points, i.e., reserved soil bodies, according to the length of the large-span rod member, and combines a pile plate machine to roll and transfer the large-span rod member supported between the track support points and the auxiliary track support points to the projection line of the position to be installed, and then combines a simple gantry frame to make the large-span rod member inclined, while auxiliary support is provided by a lattice column, and after prestress is applied, the large-span rod member is welded and fixed to the reserved steel plate on the corbel of the main structure to complete the installation of the large-span rod member, without the need for large hoisting instruments during the installation, which remedies the defect of the traditional hoisting method in the limited site.

[0012] The present application differs from the in-situ hoisting and air splicing method in the prior art, and can be spliced in advance in the site and hoisted in whole, aiming to meet the installation of steel pipe supports in various complex working conditions, and the method saves 1 / 3 of the material used for traditional hoisting and stacking, and the present application is more applicable, economical and safe than the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The present application is a large-span rod member support structure between a guide rail and a reserved soil body; Figure 2 The present application relates to a pile plate machine pushing a large-span rod member structure diagram; Figure 3 The present application relates to a large-span rod member support in a simple gantry structure diagram; Figure 4 The present application relates to a large-span rod member installation completed diagram; Figure 5 The present application relates to a steel bar pull ring and a corbel position relationship diagram; Figure 6 The present application relates to a simple gantry structure diagram; Figure 7 The present application relates to a position relationship diagram of a steel bar, double-spliced I-beam and concrete corbel.

[0014] Reference numerals: 1-large span rod; 2-safety wire rope; 3-basement roof; 4-support pile; 5-waist beam; 6-reserved soil body; 7-steel pipe support temporary stockpile; 8-anchorage bar; 9-double I-beam; 10-connecting rod; 11-automobile crane; 12-pile board machine; 13-loose joint; 14-main structure bracket; 15-lattice column; 16-connecting beam; 17-crown beam; 18-reinforcing ring; 19-concrete bracket; 20-simple gantry. DETAILED DESCRIPTION

[0015] In order to make the technical means, innovative features, purposes and effects of the present application easy to understand, the present application is further described below.

[0016] The embodiments described herein are specific concrete embodiments of the present application, used to illustrate the concept of the present application, and are explanatory and exemplary, and should not be interpreted as limiting the embodiments of the present application and the scope of the present application. In addition to the embodiments described herein, those skilled in the art can also employ other technical solutions based on the disclosure of the claims and the specification of the present application, which include technical solutions that make any obvious substitutions and modifications to the embodiments described herein.

[0017] Embodiment 1 A large-span rod pulling and sliding jacking installation method, as shown in Figures 1-7 The large-span rod 1 is more than 20m in total length, is connected obliquely between the basement roof 3 and the waist beam 5 between the support piles 4, and comprises the following steps: S1. Measurement and line laying: measure and set the installation plane position and elevation of the large-span rod 1 according to the design drawing; step S1 also includes setting a plurality of lattice columns 15 in the foundation pit between the basement roof 3 and the reserved soil body 6 along the installation direction of the plurality of large-span rods 1 at intervals, the lattice columns 15 being arranged on the projection line of the large-span rod 1, the plurality of lattice columns 15 being connected by the connecting beam 16, the top surface elevation of the lattice column 15 being less than or equal to the top surface elevation of the guide rail, and the guide rail and the reserved soil body 6 jointly supporting the large-span rod 1 in step S6.

[0018] S2. Set up the large-span rod assembly site: level and compact the ground beside the foundation pit, and set up the steel pipe support temporary stockpile 7 by surrounding with steel pipes; segmentally assemble the large-span rod 1 in the steel pipe support temporary stockpile 7, the steel pipe supports being connected by flange plate and high-strength bolts, and the flanges of the steel pipe supports being connected by 16 high-strength bolts with a diameter of 24mm and a length of 90mm; S3. Track installation: Set up concrete corbels 19 on the basement roof 3, anchor on the top surface of the concrete corbels 19, and weld double I-beams 9 on the anchor 8. The double I-beams 9 are connected by connecting rods 10. The connecting rods 10 can be formed by arranging several channel steels side by side as long as they can support the large-span member 1. The connecting rods 10 are connected end to end to form a guide rail. The top surface of the guide rail is flush with the top surface of the reserved soil body 6. The reserved soil body 6 is located in the foundation pit inside the supporting pile 4; S5. Large-span member 1 hoisting: After the large-span member 1 is assembled, it is hoisted from the assembly point to the starting point of the guide rail by a truck crane 11. The truck crane 11 keeps a safe distance from the edge of the foundation pit and sets up a steel plate for unloading. S6. Large-span member 1 transfer: One end of the large-span member 1 is placed on the guide rail, and the other end is supported on the reserved soil body 6. Steel wire ropes are wound around the end of the large-span member 1 close to the reserved soil body 6. The pile driver 12 is used to pull the steel wire ropes upward to make the large-span member 1 rotate and roll forward. When pulling, manually observe the angle between the large-span member 1 and the guide rail to ensure that the speeds of both ends are the same. After transportation, the large-span member 1 is fixed with wood to prevent rolling. S7. Large-span member 1 end fixing: The pile driver 12 lifts one end of the large-span member 1 on the reserved soil body 6, removes the guide rail, and makes the end of the large-span member 1 fall on the concrete corbel 19. Then the end of the large-span member 1 is lifted by a simple gantry 20. On the side of the reserved soil body 6, the pile driver 12 is used to adjust the large-span member 1 and fix the loose joint 13 so that it is located on the installed projection line. Then the large-span member 1 is slowly lifted, the end of the large-span member 1 on the side of the basement roof 3 is slid to connect with the main structure corbel 14, and then it is lifted to the corresponding elevation of the waist beam 5. Temporary support plates are welded on the lower side of the connecting plate between the loose joint 13 and the waist beam 5. After the large-span member 1 is temporarily fixed, the high-rise lattice column 15 is connected to the waist of the large-span member 1, and the steel support of this section is welded to the corbel at the lattice column 15 to serve as auxiliary support for the large-span member 1. After the high-rise lattice column 15 is connected, safety steel wire ropes 2 are set at the corbel 17. One end of the safety steel wire ropes 2 is fixed to the steel reinforcement ring 18 embedded on the corbel 17, and the other end is sleeved on the end of the large-span member 1. A simple gantry 20 is set corresponding to the main structure corbel 14 between the main structure corbel 14 and the concrete corbel. An electric hoist is provided on the main structure corbel 14 to assist in lifting the large-span member 1.

[0019] S8. Prestress is applied: after the large-span rod 1 is supported in place, the hydraulic jack is used to apply prestress to the loose joint 13, so that the two ends are tightly contacted with the main structure corbel 14 and the waist beam 5, and the steel wedge is tightly wedged, the large-span rod end is welded with the reserved steel plate on the main structure corbel 14, and finally the sampling axial force detection is carried out on the large-span rod 1 according to the design requirements.

[0020] Example 2 Based on example 1, the large-span rod is taken as an example of a total length of 25.5m steel pipe support, 4 6m single steel pipe support units + loose joint = 25.45m are selected, the ejection is 0.05m, the steel pipe support connection adopts flange plate 4 + high-strength bolt 5, and the flange plates between the steel supports are connected by 16 high-strength bolts with a diameter of 24mm and a length of 90mm; The simple gantry 20 is a 1500×1500×4300 door-shaped frame body welded by 300×300 I-beams, the electric hoist is located on the door-shaped frame body, the double-spliced I-beams 9 and the connecting rods 10 are combined to form the track for the large-span rod transportation, the track is welded by 300×300×10×8 I-beams, the concrete corbel 19 is poured by concrete, which can be the support corbel for the super-long rod, the top elevations of all the corbels are consistent, the steel plate should be reserved on the concrete corbel for welding and fixing with the large-span rod, the simple track is adopted to avoid the risk of large mechanical lifting and transfer.

[0021] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for traction, sliding, and jacking installation of a large-span member, wherein the large-span member (1) has a total length exceeding 20m and is obliquely connected between the basement roof slab (3) and the upper waist beam (5) of the support pile (4), characterized in that: Includes the following steps: S1. Measurement and layout: Measure and set out the installation plane position and elevation of the large-span members (1) according to the design drawings; S2. Set up a large-span member assembly site: level and compact the ground next to the foundation pit, and set up a temporary steel pipe support storage area by using steel pipe enclosure (7). S3. Track installation: Concrete corbels (19) are installed on the basement roof slab (3), and steel bars are planted on the top surface of the concrete corbels (19). Double I-beams (9) are welded on the steel bars (8). The double I-beams (9) are connected by connecting rods (10). The connecting rods (10) are connected end to end to form a guide rail. The top surface of the guide rail is flush with the top surface of the reserved soil (6). The reserved soil (6) is located in the foundation pit inside the support piles (4). S5. Lifting of large span members (1): After the large span members (1) are assembled, a truck crane (11) is used to lift them from the assembly point to the starting point of the guide rail. The outriggers of the truck crane (11) maintain a safe distance from the edge of the pit and steel plates are set up for unloading. S6. Transfer of large span member (1): One end of the large span member (1) is placed on the guide rail, and the other end is supported on the reserved soil (6). A steel wire rope is wrapped around the end of the large span member (1) near the reserved soil (6). The steel wire rope is pulled upward by the clamp of the pile plate machine (12) to pull the large span member (1) so that it rotates and rolls forward. When pulling, the angle between the large span member (1) and the guide rail is observed manually to ensure that the speeds at both ends are the same. After the transport is in place, it is blocked with wooden blocks to prevent rolling. S7. Fixing the end of the large span member (1): Combine the pile plate machine (12) and the simple gantry frame (20) set on the basement roof slab (3), lift the end of the large span member (1) near the support pile (4), remove the guide rail, so that the large span member (1) falls on the concrete corbel (19), and then support the end of the large span member (1) on the electric hoist on the simple gantry frame (20); On the reserved soil (6) side, the pile plate machine (12) is used to adjust the height of the large span member (1) and fix the movable head (13) so that it is located at the installation completion projection line. Then, the large span member (1) is slowly lifted so that the end of the large span member (1) on the basement roof (3) side slides and connects with the main structure corbel (14). Then, it is lifted to the corresponding elevation of the waist beam (5). A temporary support plate is welded on the lower side of the connecting plate between the movable head (13) and the waist beam (5). S8. Applying prestress: After the large-span member (1) is supported in place, apply prestress to the movable head (13) by hydraulic jack, so that its two ends are pressed against the main structure bracket (14) and waist beam (5), weld the end of the large-span member (1) to the reserved steel plate on the main structure bracket (14), and wedge it with steel wedges. Finally, perform sampling axial force testing on the large-span member (1) according to the design requirements.

2. The method for traction, sliding, and jacking installation of large-span structural members as described in claim 1, characterized in that: Step S1 also includes a number of lattice columns (15) installed in the foundation pit between the basement top slab (3) and the reserved soil (6) along the installation direction of a number of large-span members (1). The lattice columns (15) are set on the projection line of the large-span members (1). The number of lattice columns (15) are connected by connecting beams (16). The top surface elevation of the lattice column (15) is less than or equal to the top surface elevation of the guide rail. Together with the guide rail and the reserved soil (6), they support the large-span members (1) in step S6.

3. The method for traction, sliding, and jacking installation of large-span structural members as described in claim 2, characterized in that: After the large-span member (1) is temporarily fixed in step S7, the high lattice column (15) is connected to the waist of the large-span member (1), and the corbel of the steel support section located at the lattice column (15) is welded.

4. The method for traction, sliding, and jacking installation of large-span members as described in claim 3, characterized in that: After connecting the high-grid column (15) in step S7, a safety wire rope (2) is installed at the cap beam (17). One end of the safety wire rope (2) is fixed to the steel bar pull ring (18) embedded on the cap beam (17), and the other end is sleeved at the end of the large-span member (1).

5. The method for traction, sliding, and jacking installation of large-span members as described in claim 1, characterized in that: In step S7, the simple gantry frame (20) is set up in correspondence with the main structure bracket (14) and is set on the main structure bracket (14) and the concrete bracket. An electric hoist is set on the main structure bracket (14) to assist in the installation of large span members (1).

6. The method for traction, sliding, and jacking installation of large-span structural members as described in claim 1, characterized in that: Step S2 also includes assembling the large-span members (1) in sections at the temporary steel pipe support storage area (7). The steel pipe supports are extended using flange connecting plates and high-strength bolts. The flanges between the steel pipe supports are connected by 16 high-strength bolts with a diameter of 24mm and a length of 90mm.

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