Construction technology of cast-in-place anchor beam hanger system

Abstract

A construction process for a cast-in-place anchor beam hanger system is to respectively erect mutually connected upper hanger supporting members and formwork platforms at the top and bottom of the connection between two prefabricated box beams, and erect an operating platform below the formwork platform, specifically including the following steps: erecting upper hanger supporting members, erecting formwork platforms, erecting operating platforms, laying formwork components, casting and maintaining box-type anchor beams, and dismantling. The present invention can solve the problem of cast-in-place beam formwork construction that cannot be constructed by conventional scaffolding due to the influence of terrain; the main materials and equipment required are extremely common in bridge engineering, and the operating cost is low; it effectively solves the problem of cast-in-place anchor beam bottom formwork support in special environments, and the construction method is not affected by terrain and other conditions; all personnel and mechanical operations are performed on the prefabricated box beams that have been erected, which is safer and more reliable than traditional construction techniques.

Description

Technical Field

[0001] The invention relates to the technical field of supporting component systems on hangers, and in particular to a construction process of a cast-in-place anchor beam hanger system. Background Art

[0002] With the further investment in my country's infrastructure and the improvement of construction technology, bridges have made great progress as a convenient structural form across rivers, valleys and road trunk lines. New bridges in cities must not only meet the requirements of practicality, but also have a certain aesthetics. Decorative cable-stayed bridges combine the advantages of economy, beauty, and practicality. When constructing bridges, we often encounter crossing rivers. After the prefabricated beams and slabs are installed, the cast-in-place anchor beams are affected by the terrain and cannot be set up in the water. The existing technology adopts large-scale pipe pile rack support construction. Large pile drivers and other machinery are required in pipe pile construction. The requirements for the mechanical working surface are high, the construction period is long, and the demolition operation is dangerous. During the installation process, the plane position and elevation of the pipe pile rack are difficult to control accurately, the construction quality is not easy to guarantee, and the cost is high, which has brought certain impacts to the construction. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a construction process for a cast-in-place anchor beam hanger system which can accurately control the construction, ensure the construction quality and has low cost.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a construction process of a cast-in-place anchor beam hanger system, which is to respectively set up mutually connected hanger upper supporting components and formwork platforms at the top and bottom of the connection between two prefabricated box beams, and set up an operating platform below the formwork platform, which specifically includes the following steps: 1) Setting up the hanger upper supporting components: respectively installing a plurality of support frames in parallel on the two prefabricated box beams at the connection, setting up a plurality of upper cross beams on the left and right support frames, and then installing hangers at the preset lifting holes at both ends of the upper cross beams, and the hangers pass downward through the wing plates of the box beam; 2) Setting up the formwork platform: installing the lower cross beam at the lower part of the hanger; 3) Setting up the operating platform: Install the bottom crossbeam at the bottom of the boom, lay multiple channel steels in parallel on several bottom crossbeams, and then set up the working basket on the channel steels; after the operation platform is set up, lay multiple lower longitudinal beams in parallel on several lower crossbeams; the operation platform is mainly used to solve the problems of installing the template assembly of the tooth block and the subsequent removal of the template assembly, as well as the final installation of the inclined cable; 4) Laying the template assembly: The staff lays the back ribs on the template platform, and then lays the template assembly on the back ribs; 5) Casting and curing the box anchor beam: Pour concrete into the template assembly twice, vibrate it with an inserted vibrator, cover it after the slurry is collected, and sprinkle water for insulation and curing; 6) Dismantling: Dismantle in sequence, first dismantle the template assembly, back ribs, and lower longitudinal beams, and then dismantle other components after completing the installation of the inclined cable; install the wire rope through the wire rope lifting hole, and use the wire rope to remove the lower crossbeam and bottom crossbeam by the swinging method.

[0005] Furthermore, the support frame includes a transition beam and a transition block. The bottom of the transition beam is installed on the box beam through the transition block, and the top of the transition beam supports the upper cross beam through the transition block.

[0006] Furthermore, the template assembly includes a bottom template, a side template and an inner template.

[0007] Furthermore, the back ribs are square wood.

[0008] Furthermore, the operating platform and the template assembly are both made of bamboo plywood.

[0009] Furthermore, the first pouring of concrete in step 5) is performed to the chamfer of the box-type anchor beam.

[0010] Furthermore, the hanger rod is a precision-rolled threaded steel bar, and the upper crossbeam, transition beam, transition block, lower crossbeam, lower longitudinal beam and bottom crossbeam are all I-beams.

[0011] Furthermore, according to the tensioning requirements of the anchor beam at a later stage, the tooth block is installed, and then sand is poured into the sand filling cavities on both sides of the tooth block.

[0012] The beneficial effects of the present invention are that it can solve the problem of cast-in-place beam formwork construction that cannot be constructed by conventional scaffolding due to the influence of terrain; the main materials and equipment required are extremely common in bridge engineering and have low operating costs; it effectively solves the problem of cast-in-place anchor beam bottom formwork support under special circumstances, and the construction method is not affected by terrain and other conditions; all personnel and mechanical operations are performed on the prefabricated box beam that has been erected, which is safer and more reliable than traditional construction technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] In the attached figure: 1. box beam, 11. box anchor beam, 12. wire rope lifting hole, 13. wing plate, 21. upper cross beam, 22. transition beam, 23. transition block, 24. hanging rod, 31. lower cross beam, 32. lower longitudinal beam, 33. tooth block, 34. sand filling cavity, 35. back rib, 36. formwork assembly, 41. bottom cross beam, 42. channel steel, 43. working basket. DETAILED DESCRIPTION

[0015] The specific implementation mode of the present invention is further described in detail below in conjunction with embodiments:

[0016] like Figure 1 As shown, an embodiment of the construction process of a cast-in-place anchor beam hanger system is to respectively set up mutually connected hanger upper supporting members and formwork platforms at the top and bottom of the connection between two prefabricated box beams 1, and set up an operating platform below the formwork platform, which specifically includes the following steps:

[0017] 1) Erection of the upper supporting components of the hanger: a number of support frames are installed in parallel on the two prefabricated box beams 1 at the connection, and 80 single 6m long double-piece I36b I-beam upper crossbeams 21 are installed on the left and right support frames, and then the hangers 24 are installed at the preset lifting holes at both ends of the upper crossbeam 21. The hangers 24 are φ32 fine-rolled threaded steel bars, and there are 80 hangers 24 in total. The hangers 24 all pass through the wing plates 13 of the box beam 1 downward; according to the later tensioning needs of the anchor beam 1, a tooth block 33 is installed between the middle part of the lower crossbeam 31 and the template 36, and then sand is poured into the sand filling cavity 34 on both sides of the tooth block 33; the support frame includes an I-beam transition beam 22 and an I-beam transition block 23. The bottom of the transition beam 22 is installed on the box beam 1 through the transition block 23, and the top of the transition beam 22 supports the upper crossbeam 21 through the transition block 23.

[0018] 2) Setting up the formwork platform: Install 80 double-piece I36b I-beam lower cross beams 31 with a length of 6 m each at the bottom of the hanger 24 . After the operation platform is set up, lay 4 single I20 I-beam lower longitudinal beams 32 with a length of 9 m each in parallel on the lower cross beams 31 .

[0019] 3) Setting up the operating platform: Install a double-jointed I20b I-beam bottom cross beam 41 at the lower part of a single 6m long hanger 24, lay multiple channel steels 42 in parallel on a number of bottom cross beams 41, and then set up a working basket 43 on the channel steels 42; the operating platform is made of bamboo plywood; the operating platform is mainly used to solve the problems of installing the formwork assembly 36 of the tooth block 33 and the subsequent removal of the formwork assembly 36, as well as the final installation of the inclined cable.

[0020] 4) Laying the formwork assembly: The staff uses the working basket 43 of the operating platform to lay the back rib 35 on the lower longitudinal beam 32. The back rib 35 is a square wood, and then lays the formwork assembly 36 on the back rib 35. The formwork assembly 36 includes a bottom form, a side form and an inner form; the formwork assembly 36 is made of bamboo plywood.

[0021] 5) Casting and curing the box anchor beam 11: Concrete is poured into the formwork assembly 36 in two batches. The first time, concrete is poured to the chamfer of the box anchor beam 11, and an inserted vibrator is used for vibrating. After the slurry is collected, it is covered and watered for thermal insulation curing.

[0022] 6) Dismantling: dismantle in order, first dismantle the formwork assembly 36 and the back rib 35, the lower longitudinal beam 32, and then dismantle other components after completing the installation of the inclined cable; install the wire rope through the wire rope lifting hole 12, and use the wire rope to dismantle the lower cross beam 31 and the bottom cross beam 41 by swinging method.

[0023] The contents not described in detail in the specification belong to the prior art well known to those skilled in the art.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A construction process for a cast-in-place anchor beam hanger system, characterized in that: To respectively set up mutually connected hanger upper supporting members and formwork platforms at the top and bottom of the connection between two prefabricated box beams, and set up an operating platform below the formwork platform, the specific steps include: 1) Install the upper supporting components of the hanger: install several support frames in parallel on the two prefabricated box beams at the connection, install several upper beams on the left and right support frames, and then install the hangers at the preset lifting holes at both ends of the upper beams. The hangers pass through the wing plates of the box beam downwards; 2) Set up the formwork platform: install the lower beam at the bottom of the hanger; 3) Setting up the operating platform: Install the bottom cross beam at the bottom of the boom, lay multiple channel steels in parallel on several bottom cross beams, and then set up the working basket on the channel steels; after the operating platform is set up, lay multiple lower longitudinal beams in parallel on several lower cross beams; 4) Laying the formwork components: The workers lay the back ribs on the formwork platform, and then lay the formwork components on the back ribs; 5) Casting and curing of box anchor beams: Pour concrete into the formwork assembly twice, vibrate with an insert vibrator, cover and sprinkle water for thermal insulation after the slurry is collected; 6) Dismantling: dismantle in sequence, first dismantle the formwork assembly, back ribs and lower longitudinal beam, and then dismantle other components after completing the installation of the inclined cable; install the wire rope through the wire rope lifting hole, and use the wire rope to remove the lower crossbeam and bottom crossbeam by swinging; the formwork assembly includes a bottom mold, a side mold and an inner mold; the first pouring of concrete to the chamfer of the box-type anchor beam in step 5); the hanging rod is a precision-rolled threaded steel bar, and the upper crossbeam, transition beam, transition block, lower crossbeam, lower longitudinal beam and bottom crossbeam are all I-beams; install the tooth block according to the later tensioning needs of the anchor beam, and then fill the sand filling cavity on both sides of the tooth block with sand; the support frame includes a transition beam and a transition block, the bottom of the transition beam is installed on the box beam through the transition block, and the top of the transition beam supports the upper crossbeam through the transition block.

2. The construction process of a cast-in-place anchor beam hanger system according to claim 1, characterized in that: The dorsal ribs are square wood.

3. The construction process of a cast-in-place anchor beam hanger system according to claim 2, characterized in that: The operating platform and the template assembly are both made of bamboo plywood.

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