Multifunctional gantry for construction of suspension bridge

Abstract

The utility model relates to a multifunctional gantry for construction of a suspension bridge, which comprises main trusses and a cross beam, the main trusses are arranged on two sides of the gantry, and the main trusses on the two sides are connected through the cross beam; a stand column of the main truss is supported above an anchorage foundation pit concrete foundation or a main tower, a main beam is arranged at the top of the main truss and horizontally extends to form a cantilever, and a walking track is laid on the main beam. The utility model has the beneficial effects that: a structural form of two main trusses and transverse bracings is adopted, all components adopt profile steel, and are connected and assembled into a whole through bolts, so that the truss can be used as an unearthed gantry in an anchorage foundation pit excavation project, and then, a small part of rod pieces can be changed and replaced to be transferred to a tower top for main cable saddle hoisting and main cable erection construction.

Description

Technical Field

[0001] The utility model relates to the technical field of suspension bridge construction, in particular to a multi-functional gantry for suspension bridge construction. Background Technique

[0002] The gantry has the advantages of simple assembly and disassembly, convenient movement, good load-bearing capacity, safe and reliable use, good economic benefits, etc., so it is a commonly used temporary structure in the construction of suspension bridges. However, the gantry in the prior art has a relatively single function after being built, and it is difficult to meet the construction requirements that change with the construction stage during the construction process of the suspension bridge. To meet various construction requirements, multiple gantries need to be built, resulting in high construction costs and large material consumption.

[0003] Therefore, there is an urgent need for a multi-functional gantry for suspension bridge construction to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a multi-functional gantry for suspension bridge construction.

[0005] This multi-functional gantry for suspension bridge construction includes: a main truss and a cross beam. The main trusses are arranged on both sides of the gantry, and the two main trusses on both sides are connected by a cross beam; the columns of the main truss are supported on the concrete foundation of the anchor foundation pit or above the main tower. A main beam is provided at the top of the main truss, and the main beam extends horizontally to form a cantilever. A walking track is laid on the main beam.

[0006] A walking trolley is arranged on the walking track, a lifting cross beam is provided on the walking trolley, and a lifting device is provided on the lifting cross beam. The lifting device is used to hang an object between the two main trusses on both sides.

[0007] Preferably, the main truss includes a cantilever large diagonal brace. One end of the cantilever large diagonal brace is fixedly connected to the lower part of the end of the main beam extending above the foundation pit, and the other end is fixed below the middle height of the column; a cross bar is horizontally fixed in the middle of the cantilever large diagonal brace, and the cross bar is fixedly connected to the column.

[0008] Preferably, a vertical bar is fixedly connected to the middle of the cantilever large diagonal brace, and the vertical bar is vertically connected to the bottom of the main beam; several small diagonal braces are provided between the cantilever large diagonal brace and the main beam, and between the column and the main beam. Below the cross bar between the columns, the two columns are connected by two small diagonal braces respectively.

[0009] Preferably, two cross beams are connected to each end of the main beam in the length direction, and the two cross beams at one end of the main beam are fixedly connected by a cross beam connecting rod.

[0010] Preferably, a diaphragm wall and an inner lining capping beam are provided at the edge of the anchor foundation pit; when the gantry is supported outside the anchor foundation pit, the cantilever extends above the anchor foundation pit; concrete foundations are poured above the inner lining capping beam of the foundation pit and outside the anchor foundation pit, and the columns are fixed above the concrete foundation through embedded parts.

[0011] Preferably, a guide wall outside the foundation pit is fixed to the outside of the concrete foundation above the inner lining capping beam of the foundation pit. A concrete hardened ground is poured above the guide wall outside the foundation pit and the concrete foundation outside the anchor foundation pit. A diagonal leg support is fixedly arranged on the side of one of the main trusses, and the diagonal leg support is arranged on the side of this main truss away from the other main truss.

[0012] The beneficial effects of the utility model are as follows:

[0013] The utility model adopts the structural form of "two main trusses + cross bracing". All components are made of section steel and assembled into a whole through bolt connection. It can be used as an earth excavation gantry in the anchor foundation pit excavation project, and then a small number of members can be changed and replaced and transferred to the top of the tower for the construction of main saddle hoisting and main cable erection; the structure is simple, the installation and disassembly are convenient, and it can be used for multiple purposes. By comprehensively considering various construction conditions of the suspension bridge, a multi-functional cantilever gantry is designed, which can complete the construction in different construction stages, reduce the construction cost, reduce the material consumption, improve the utilization rate of construction materials, and is applicable to the construction of the anchor and cable of the suspension bridge. Description of the Drawings

[0014] Figure 1 It is a side view of the earth excavation gantry for the anchor foundation;

[0015] Figure 2 It is a front view of the earth excavation gantry for the anchor foundation;

[0016] Figure 3 It is a side view of the gantry at the top of the tower;

[0017] Figure 4 It is a front view of the gantry at the top of the tower;

[0018] Figure 5 It is a top view of the gantry;

[0019] Figure 6 It is a schematic diagram of the first unit component of the main truss sheet of the gantry;

[0020] Figure 7 It is a schematic diagram of the second unit component of the main truss sheet of the gantry;

[0021] Figure 8 It is a schematic diagram of the third unit component of the main truss sheet of the gantry;

[0022] Figure 9 It is a schematic diagram of the bolt connection of the end plate of the member;

[0023] Figure 10 It is a schematic diagram of the embedded part of the gantry column foot.

[0024] Description of reference numerals: Column 01, cross bar 02, vertical bar 03, small diagonal brace 04, cantilever large diagonal brace 05, main beam 06, cross beam 07, cross beam connecting rod 08, inclined leg support 09, traveling track 11, traveling trolley 12, lifting cross beam 13, lifting equipment 14, hook 15, hopper 16, concrete hardened ground 21, concrete foundation 22, guide wall outside the foundation pit 23, diaphragm wall of the anchor foundation pit 24, lining capping beam 25, main tower 26, upper cross beam 27, end plate of the member 31, high-strength bolt 32, stiffening plate 41, embedded part 42, embedded part of the column foot 43. Detailed implementation manners

[0025] The following further describes the present utility model in conjunction with embodiments. The description of the following embodiments is only used to help understand the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

[0026] Embodiment 1

[0027] As an embodiment, this multi-functional gantry for suspension bridge construction, as Figure 1 and Figure 2 shown, includes: a main truss and a cross beam 07. The main truss is arranged on both sides of the gantry, and the two main trusses on both sides are connected by the cross beam 07.

[0028] Specifically, as Figure 5 shown, two cross beams 07 are respectively connected to both ends of the main beam 06 in the length direction. The two cross beams 07 at one end of the main beam 06 are fixedly connected by a cross beam connecting rod 08.

[0029] The main truss includes a column 01, a main beam 06 and a cantilever large diagonal brace 05; the main beam 06 is arranged at the top of the main truss, and the main beam 06 extends horizontally to form a cantilever.

[0030] A vertical bar 03 is fixedly connected to the middle of the cantilever large diagonal brace 05, and the vertical bar 03 is vertically connected to the bottom of the main beam 06; several small diagonal braces 04 are arranged between the column 01 and the main beam 06, and the cross bars 010 between the columns 01 are respectively connected to the two columns 01 through two small diagonal braces 04.

[0031] One end of the cantilever large diagonal brace 05 is fixedly connected to the lower part of the end of the main beam 06 extending above the foundation pit, and the other end is fixed below the middle height of the column 01; a cross bar 02 is horizontally fixed in the middle of the cantilever large diagonal brace 05, and the cross bar 02 is fixedly connected to the column 01.

[0032] The main truss is divided into three sheet frame unit components, respectively as Figures 6 to 8As shown in the figure, the main truss is divided into separate unit components, which are prefabricated in the factory. In each frame unit component, according to the design dimensions, a member end plate 31 is provided at the end where each unit component is connected to another unit component, and high-strength bolt 32 holes are reserved for convenient installation and disassembly. The components are assembled and used at the construction site. At the same time, the members within each frame unit component are also connected in the same way for convenient replacement and installation. During installation, after the three frame unit components are respectively assembled on the ground, the entire main truss is hoisted and installed.

[0033] The front and rear cross beams 07 are installed separately. After welding the cross beam connecting rods 08 between the two cross beams 07, the cross beams 07 are integrally installed on the main beam 06.

[0034] A walking track 11 is laid on the main beam 06; a walking trolley 12 is arranged on the walking track 11, a lifting cross beam 13 is provided on the walking trolley 12, a lifting device 14 is provided on the lifting cross beam 13, and a hook 15 is connected to the bottom of the lifting device 14 for hoisting and transporting objects between the two main trusses.

[0035] Embodiment 2

[0036] As another embodiment, this embodiment 2 is proposed based on embodiment 1. For this multi-functional gantry for suspension bridge construction, the column 01 of the main truss is supported outside the anchor foundation pit, and the cantilever extends above the anchor foundation pit. A hopper 16 is hung by the hook 15 at the bottom of the lifting device 14.

[0037] An anchor foundation pit diaphragm wall 24 and an inner lining capping beam 25 are provided at the edge of the anchor foundation pit; when the gantry is supported outside the anchor foundation pit, the cantilever extends above the anchor foundation pit; concrete foundations 22 are poured above the inner lining capping beam 25 of the foundation pit and outside the anchor foundation pit. During the construction of the gantry at the anchor, first, according to the measurement lofting points, the column base embedded parts 43 are accurately positioned and embedded in the concrete foundation 22. Among them, the concrete foundation 22 outside the anchor foundation pit also functions as a counterweight, and the column 01 is fixed above the concrete foundation 22 through the embedded parts 42.

[0038] A guide wall 23 outside the foundation pit is fixed to the outside of the concrete foundation 22 above the inner lining capping beam 26 of the foundation pit. A concrete hardened ground 21 is poured above the guide wall 23 outside the foundation pit and the concrete foundation 22 outside the anchor foundation pit to facilitate the movement of dump trucks. An inclined leg support 09 is fixedly provided on the side of one of the main trusses. The inclined leg support 09 is arranged on the side of this main truss away from the other main truss, and the bottom of the inclined leg support 09 is fixed on the concrete hardened ground 21.

[0039] During the construction of the anchor excavation, the counterweight concrete foundation 22 is first poured. Three sheet frames are lifted and installed by a crane. The first unit part of the sheet frame is welded to the position of the embedded part 42 of the concrete foundation, and then the second and third unit parts of the sheet frame are successively installed through high-strength bolts 32 until the overall main truss is assembled. After the first main truss is assembled on-site and the verticality and stability of one side of the main truss are ensured, the second main truss is installed according to the same steps, and then the cross beam 07 between the main trusses is installed, and finally the inclined leg support 09 is installed.

[0040] During the construction of the anchor excavation, the traveling track 11 is installed on the top of the gantry, and the traveling trolley 12 is arranged thereon. The lifting cross beam 13 is arranged on the traveling trolley 12, and the lifting equipment 14 is placed on the cross beam. The slag is removed by using the lifting bucket 16 in cooperation with the dump truck. The dump truck directly drives under the gantry outside the foundation pit. The excavator fills the muck into the lifting bucket 16 at the bottom of the pit. After the lifting bucket 16 is filled with muck from below the foundation pit, the lifting bucket 16 is lifted above the horizontal ground through the lifting equipment 14, then moved outside the foundation pit and directly unloaded into the dump truck and transported away, forming a set of high-efficiency foundation pit muck removal facilities.

[0041] It should be noted that the parts that are the same or similar to those in Embodiment 1 in this embodiment can be referred to each other and will not be elaborated in this application.

[0042] Embodiment 3

[0043] As another embodiment, this Embodiment 3 is proposed on the basis of Embodiment 1. This multi-functional gantry for the construction of the suspension bridge is installed above the main tower 26, as Figure 3 and Figure 4 shown. The column base embedded part 43 is pre-embedded in the main tower 26, and the embedded steel plate 42 at the top of the column base embedded part 43 is exposed on the surface of the main tower 26. The column 01 is supported on the main tower 26, and the column 01 is welded to the embedded steel plate 42. The height of the column 01 can be set as required.

[0044] On the top of the main tower 26, the top gantry is installed according to the same installation steps as the anchor gantry. The inclined leg support 09 is fixedly arranged on the side of one main truss. The inclined leg support 09 is arranged on the side of this main truss far from the other main truss, and the bottom of the inclined leg support 09 is fixedly arranged on the upper cross beam 27 on one side of the main tower 26.

[0045] Then, the crane traveling track 11 is installed on the main beam 06, and the traveling trolley 12 is arranged thereon. The lifting cross beam 13 is arranged on the traveling trolley 12, and the lifting equipment 14 is placed on the cross beam. The lifting hook 15 is used for hoisting the main and dispersion saddles at the top of the tower, the grating and its auxiliary facilities.

[0046] On the tower top gantry, during the erection of the catwalk, the erection of the cable strands, the transverse movement, and the saddle entry, it is achieved through the hoisting equipment 14 arranged on the tower top gantry and the corresponding guide wheels and pulleys. On the tower top gantry, during the cable compacting, the installation of the cable clip sling, and the wire winding work, the construction is completed by using the hoisting equipment 14 to tow the catwalk trolley, the cable compacting machine, and the wire winding machine.

[0047] It should be noted that the parts that are the same or similar to those in Embodiment 1 and Embodiment 2 in this embodiment can be referred to each other and will not be described in detail in this application.

[0048] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts between the various embodiments, reference can be made to each other.

Claims

1. A multifunctional gantry for suspension bridge construction, characterized in that: include: Main trusses and crossbeams. The main trusses are arranged on both sides of the portal frame, and the main trusses on both sides are connected by crossbeams. The columns of the main trusses are supported on the outside of the anchor pit or above the main tower. The top of the main trusses is provided with a main beam, which extends horizontally to form a cantilever, and a walking track is laid on the main beam. A traveling trolley is arranged on the traveling track, a lifting beam is arranged on the traveling trolley, a lifting device is arranged on the lifting beam, and the lifting device is used to hang the object between the main trusses on both sides.

2. The multifunctional gantry for suspension bridge construction according to claim 1, characterized in that: The main truss includes a large cantilevered diagonal brace, one end of which is fixedly connected to the bottom of the end of the main beam extending above the foundation pit, and the other end is fixed below the middle height of the column; the middle part of the large cantilevered diagonal brace is horizontally connected to the adjacent column through a cross bar, and a cross bar is also provided at the same height between the columns.

3. The multifunctional gantry for suspension bridge construction according to claim 2 is characterized in that: A vertical rod is fixedly connected to the middle part of the cantilever large diagonal brace, and the vertical rod is vertically connected to the bottom of the main beam; several small diagonal braces are arranged between the cantilever large diagonal brace and the main beam, and between the column and the main beam, and the two columns are connected to each other through two small diagonal braces under the cross bar between the columns.

4. The multifunctional gantry for suspension bridge construction according to claim 1, characterized in that: Two cross beams are respectively connected to the two ends of the main beam in the length direction, and the two cross beams at the end of one side of the main beam are fixedly connected by a cross beam connecting rod.

5. The multifunctional gantry for suspension bridge construction according to claim 1, characterized in that: Anchor pit ground connection walls and lining cap beams are provided at the edge of the anchor pit; when the portal frame is supported on the outside of the anchor pit, the cantilever extends above the anchor pit; concrete foundations are poured above the lining cap beams of the pit and outside the anchor pit, and columns are fixed above the concrete foundations by embedded parts.

6. The multifunctional gantry for suspension bridge construction according to claim 5, characterized in that: An outer guide wall of the foundation pit is fixed on the outside of the concrete foundation above the lining cap beam of the foundation pit, and a concrete hardened ground is poured above the outer guide wall of the foundation pit and the concrete foundation outside the anchor pit. An inclined leg support is fixed on the side of the main truss on one side, and the inclined leg support is arranged on the side of this main truss away from the other main truss.

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