Wharf type steel truss girder assembly field structure suitable for limited terrain

Abstract

The utility model provides a wharf type steel truss girder assembly field structure suitable for limited terrains. Comprising steel pipe supports and a transfer wharf. The transfer wharf comprises an area behind the cable bent tower bearing platform and an area in front of the cable bent tower bearing platform, a two-step or multi-step structure is formed between the two areas along with the terrain, support stand column foundation pits are dug in the area behind the cable bent tower bearing platform and the area in front of the cable bent tower bearing platform, and steel pipe supports are installed in the steel pipe support stand column foundation pits. The construction method has the advantages that the wharf type steel truss girder assembly site is arranged, limited construction sites on site are fully utilized, more assembly construction platforms are erected, the construction efficiency of steel truss girder assembly can be effectively improved, and the construction period of bridge construction is shortened; 2, by arranging a wharf type steel truss girder assembly field, the erection height and the construction difficulty of the steel pipe upright post bracket can be reduced, so that the safety risk of construction and the construction cost of field construction are reduced;

Description

Technical Field

[0001] The utility model relates to the field of bridge engineering, in particular to a wharf-type steel truss assembly site structure suitable for use in limited terrain. Background Art

[0002] As the expressway network extends to the western mountainous areas, large bridges spanning mountainous areas, river valleys, gullies, etc. emerge in an endless stream, and bridges with strong spanning capabilities such as suspension bridges, cable-stayed bridges, and arch bridges are constantly being used. However, due to the influence of mountainous sites and roads, mountainous bridge construction also faces many difficulties. This patent is mainly aimed at the construction and use of steel truss assembly sites for suspension bridges in mountainous areas. By adopting a "wharf-style" assembly site structure, it overcomes the difficulties of steep slopes and small sites in mountainous areas, rationally utilizes effective sites, creates more assembly areas, reduces safety risks of construction in mountainous areas, and reduces construction costs. Utility Model Content

[0003] The purpose of this application is to provide a "wharf-type" steel truss assembly site structure suitable for limited terrain. Combined with the on-site terrain and the cable tower pedestal structure, the steel pipe bracket is set up in the area behind the cable tower pedestal and in front of the pedestal as the steel truss plate assembly area, and then the original ground structure in front of the cable tower and the steel pipe bracket are reasonably used to form the steel truss rod assembly area. A "step-type" structure is formed between the two areas, thereby establishing more steel truss assembly areas. Finally, a transfer "wharf" is set up in front of the plate assembly area to complete the high and low transfer and assembly of the steel truss plates between the rods, which can effectively speed up the bridge construction process and reduce construction safety risks.

[0004] The present application is implemented by providing a dock-type steel truss assembly yard structure suitable for use in limited terrain, characterized in that it includes a steel pipe support and a transfer dock;

[0005] The transfer terminal includes the area behind the cable tower pedestal and the area in front of the cable tower pedestal. Two steps or more steps are formed between the two areas according to the terrain. Support column foundation pits are dug in the area behind the cable tower pedestal and the area in front of the cable tower pedestal, and steel pipe supports are installed in the steel pipe support column foundation pits.

[0006] Furthermore, the steel pipe support is a steel pipe Bailey beam steel support; the steel pipe support is composed of a steel pipe column, a steel main beam, a Bailey beam, a distribution beam, and a thin steel plate from bottom to top; the structures are connected by U-bolts or welding, and a diagonal brace in the force direction is set at the end steel pipe column to complete the erection of the steel pipe support assembly area.

[0007] Furthermore, a gantry crane for hoisting construction is arranged at the transfer terminal, and the gantry crane is installed on the Bailey beam.

[0008] Furthermore, concrete is poured on the leveled area behind the tower cap and in front of the tower cap, steel trusses are installed on the concrete, and drainage ditches are dug on the outermost side of the concrete to prevent the site from being eroded by rainwater and causing foundation sinking.

[0009] This application is implemented in the following ways:

[0010] Step 1: Site excavation and leveling

[0011] The area behind and in front of the cable tower foundation is backfilled, compacted and leveled to form a two-layer or multi-layer step structure between the two areas. The support column foundation pit is dug in the site according to the layout position of the steel pipe support.

[0012] Step 2: Steel pipe support foundation construction

[0013] The bearing capacity of the steel pipe foundation column pit should be checked before use, and it should meet the bearing capacity requirements. Make the foundation steel bars in the steel pipe support column pit, bury the steel pipe column connection embedded parts, and finally pour the foundation concrete.

[0014] Step 3: Site Concrete Pouring

[0015] Pour site concrete on the leveled site. The concrete strength in the site should meet the requirements of bearing the steel truss structure. At the same time, the site should be set with a cross slope to facilitate drainage.

[0016] Step 4: Erection of steel pipe support

[0017] According to the design drawings, steel pipe columns, transverse main beams, longitudinal Bailey beams, distribution beams and steel plates are erected in sequence to complete the erection of the steel pipe support assembly area.

[0018] Step 5: Pier Construction

[0019] Bailey beam supports are extended on both sides of the front end of the steel pipe support to serve as a gantry crane lifting dock to transfer large structures from the high platform to the low platform.

[0020] The advantages of this application are: 1. This application sets up a "wharf" type steel truss assembly site, fully utilizes the limited construction site on site, and sets up more assembly construction platforms, which can effectively improve the construction efficiency of steel truss assembly and speed up the construction period of bridge construction. 2. This patent sets up a "wharf" type steel truss assembly site, which can reduce the erection height and construction difficulty of steel pipe column brackets, thereby reducing the safety risk of construction and the construction cost of site construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the layout diagram of the dock-type steel truss assembly site.

[0022] Among them: the rear area of ​​the cable tower foundation 1, the front area of ​​the cable tower foundation 2, the support column foundation pit 3, the steel pipe support 4, the assembly area 5, the steel truss 6, and the gantry crane 7. DETAILED DESCRIPTION

[0023] The following will be combined with the attached Figure 1 The device is described in detail, and the technical solution in the embodiment of the device is described clearly and completely. Obviously, the described embodiment is only a part of the embodiment of this patent, not all of the embodiments. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0024] This utility model patent provides a "wharf-style" steel truss assembly site structure suitable for limited terrain; combined with the on-site terrain and the cable tower pedestal structure, the steel pipe bracket is set up in the area behind the cable tower pedestal and in front of the pedestal as the steel truss plate assembly area, and then the original ground structure in front of the cable tower and the steel pipe bracket are reasonably used to form the steel truss rod assembly area, forming a "step-type" structure between the two areas, thereby establishing more steel truss assembly areas. Finally, a transfer "wharf" is set up in front of the plate assembly area to complete the high and low transfer assembly of the steel truss plates between the rods, which can effectively speed up the bridge construction process and reduce construction safety risks.

[0025] like Figure 1 As shown, a dock-type steel truss assembly yard structure suitable for use in limited terrain includes a steel pipe support 4 and a transfer dock;

[0026] The transfer terminal includes an area 1 behind the cable tower pedestal and an area 2 in front of the cable tower pedestal. A "two-step" or "multi-step" structure is formed between the two areas according to the terrain. A support column foundation pit 3 is dug in the area 1 behind the cable tower pedestal and the area 2 in front of the cable tower pedestal, and a steel pipe support 4 is installed in the steel pipe support column foundation pit 3.

[0027] In the present application, the steel pipe support 4 is a steel pipe Bailey beam steel support; the steel pipe support 4 is composed of a steel pipe column, a steel main beam, a Bailey beam, a distribution beam, and a thin steel plate from bottom to top; the structures are connected by U-bolts or welding, and a diagonal brace in the force direction is set at the end steel pipe column to complete the erection of the assembly area 5 of the steel pipe support 4.

[0028] In the present application, a hoisting construction gantry crane 7 is provided at the transfer terminal, and the gantry crane 7 is installed on the Bailey beam.

[0029] In this application, the site concrete is poured on the leveled rear area 1 of the cable tower foundation and the rear front area 2 of the cable tower foundation, and the steel truss 6 is installed on the concrete. A drainage ditch is dug on the outermost side of the concrete to prevent the site from being eroded by rainwater and causing foundation sinking.

[0030] The following is combined with Figure 1 Further explain the specific implementation method of this patent:

[0031] Step 1: Excavation and leveling of the site; backfill, compact and level the original ground in the area 1 behind the cable tower cap and the area 2 in front of the cable tower cap, forming a "two-step" or "multi-step" structure between the two areas according to the terrain. According to the assembly site layout drawings, the surveying personnel will lay out the steel pipe support 4 in the area 1 behind the cable tower cap and the area 2 in front of the cable tower cap, and dig out the support column foundation pit 3 in the area 1 behind the cable tower cap and the area 2 in front of the cable tower cap.

[0032] Step 2: Construction of steel pipe support foundation; Check the bearing capacity of the steel pipe foundation column foundation pit 3 to test its bearing capacity. If it does not meet the construction requirements, it will be reinforced by replacement and compaction. Install the steel pipe support foundation steel bars in the steel pipe support column foundation pit 3, bury the steel pipe column steel plate embedded parts, and finally pour the foundation concrete.

[0033] Step 3: pouring site concrete; pour site concrete on the leveled area 1 behind the tower cap and area 2 in front of the tower cap. The strength of the concrete in the site should meet the requirements of bearing the structural force of the steel truss 6. When pouring site concrete, horizontal and vertical drainage slopes should be set, and drainage ditches should be dug on the outermost side to prevent the site from being eroded by rainwater and causing foundation subsidence.

[0034] Step 4: Erection of steel pipe support; erect steel pipe columns, transverse main beams, longitudinal Bailey beams, distribution beams and steel plates in sequence according to the design drawings. The structures are connected by U-bolts or welding. Diagonal braces are set at the end steel pipe columns in the force direction to complete the erection of steel pipe support 4 assembly area 5.

[0035] Step 5: Wharf construction: Extend the Bailey beam supports on both sides of the front end of the steel pipe support 4 to serve as the gantry crane 7 hoisting wharf to transfer the large structure of the high platform to the low platform.

[0036] The advantages of the utility model are as follows: 1. By setting up a "wharf" type steel truss assembly site, the patent makes full use of the limited construction site on site and sets up more assembly construction platforms, which can effectively improve the construction efficiency of steel truss assembly and speed up the construction period of bridge construction. 2. By setting up a "wharf" type steel truss assembly site, the patent can reduce the erection height and construction difficulty of the steel pipe column bracket, thereby reducing the safety risk of construction and the construction cost of site construction.

Claims

1. A dock-type steel truss assembly yard structure suitable for limited terrain, characterized by: include Steel pipe supports (4) and transfer docks; The transfer terminal includes a rear area (1) of the cable tower foundation and a front area (2) of the cable tower foundation. A two-step or multi-step structure is formed between the two areas according to the terrain. A support column foundation pit (3) is excavated in the rear area (1) of the cable tower foundation and the front area (2) of the cable tower foundation, and a steel pipe support (4) is installed in the steel pipe support column foundation pit (3).

2. According to claim 1, a wharf-type steel truss assembly yard structure suitable for limited terrain, characterized in that: The steel tube support (4) is a steel tube Bailey beam steel support; the steel tube support (4) comprises, from bottom to top, a steel tube column, a steel main beam, a Bailey beam, a distribution beam, and a thin steel plate; the structures are connected by U-bolts or welding, and a diagonal brace in the force direction is provided at the end of the steel tube column to complete the erection of the steel tube support (4) assembly area (5).

3. According to claim 1, a wharf-type steel truss assembly yard structure suitable for limited terrain is characterized by: A gantry crane (7) for hoisting construction is arranged at the transfer terminal, and the gantry crane (7) is installed on the Bailey beam.

4. According to claim 1, a wharf-type steel truss assembly yard structure suitable for use in limited terrain, characterized in that: Site concrete is poured on the leveled rear area (1) of the cable tower foundation and the front area (2) of the cable tower foundation, a steel truss (6) is installed on the concrete, and a drainage ditch is dug on the outermost side of the concrete to prevent the site from being eroded by rainwater and causing foundation sinking.

Images