Construction method of large span eight-shaped truss structure material yard

Abstract

The present invention relates to a large-span eight-shaped truss structure material yard construction method, which utilizes the corridor above the material yard to construct the large-span eight-shaped truss structure material yard, divides the large-span eight-shaped truss into three parts and hoists them separately, installs a mobile docking platform on the corridor, fixes the horizontal truss part that is first hoisted on the mobile docking platform, and then hoists the oblique truss parts on both sides separately and splices them with the horizontal truss parts to form a complete large-span eight-shaped truss structure. The present invention makes full use of the existing corridor structure above the material yard, reduces the difficulty of hoisting the large-span eight-shaped truss, and is easy to ensure the shape and position accuracy of the large-span eight-shaped truss structure, and the safety risk and cost of the construction process are low.

Description

Technical Field

[0001] The invention relates to a truss structure construction technology, in particular to a large-span figure eight truss structure material yard construction method. Background Art

[0002] The figure eight material yard is a common ore storage material yard structure in mine construction. It is composed of multiple large-span figure eight truss structures. The trusses are connected by a large number of supports and purlins, and a steel structure belt conveyor corridor is arranged above them. Due to the large span of the figure eight truss in the material yard, it is conventionally assembled on the ground and then lifted by multiple truck cranes to reduce high-altitude docking. However, it is difficult to assemble the figure eight truss on the ground as a whole. It can only be laid flat and then assembled, and then lifted by a crane and turned over. The assembled large-span figure eight truss affects the position of the crane, is difficult to move after lifting, and is prone to structural deformation, with many safety hazards and high costs. Summary of the invention

[0003] The purpose of the present invention is to provide a large-span figure-eight truss structure material yard construction method to solve the problems of difficult hoisting, easy deformation, high safety risk and high cost of the existing large-span figure-eight truss structure.

[0004] The present invention is achieved in this way: a large-span eight-shaped truss structure material yard construction method comprises the following steps.

[0005] a. First hoist the corridor above the material yard and fix the corridor on the brackets at both ends.

[0006] b. Install a mobile docking platform on the corridor, the mobile docking platform includes a mobile frame, the corridor is located in the mobile frame, and the corridor can move along the length direction of the corridor, a horizontal platform frame is installed at the lower end of the mobile frame, hangers are respectively provided at both ends of the platform frame, and fall chains are installed on the hangers.

[0007] c. The figure eight truss is divided into a middle horizontal truss part and two side oblique truss parts, which are prepared and moved to corresponding positions on the ground.

[0008] d. Move the mobile docking platform to the predetermined position of the figure-eight truss, lift the horizontal truss part to the bottom of the mobile docking platform by a crane, and fix the horizontal truss part to the bottom of the mobile docking platform with the fall chain on the mobile docking platform.

[0009] e. Use a crane to lift the oblique truss parts on both sides respectively, adjust the angle of the oblique truss parts and connect and fix them with the horizontal truss parts to form a complete figure eight truss.

[0010] f. Adjust the height of the figure eight truss by using the fall chain, and lower the figure eight truss to the ground or the supporting structure on the ground.

[0011] j. Repeat steps d~f to install all the figure eight trusses in the material yard.

[0012] h. After checking that the position and shape of the figure-eight trusses are correct, use the mobile docking platform to install the supports and purlin structures between the figure-eight trusses.

[0013] i. After the overall construction of the material yard is completed, the mobile docking platform will be removed.

[0014] Furthermore, the movable frame is a rectangular frame structure, the platform frame and the hanger are truss structures, and the hanger is located above the platform frame. Rollers are arranged on the top of the movable frame, and the rollers are in contact with the top surface of the corridor so that the rectangular frame can move along the length direction of the corridor.

[0015] Furthermore, in step e, when the crane is used to lift the inclined truss part, the hook of the crane is connected to the inclined truss through multiple ropes, and a fall chain is provided between the ropes and the inclined truss, and the angle of the inclined truss is adjusted by adjusting the length of each rope through the fall chain.

[0016] Furthermore, after the position of the mobile docking platform on the corridor is determined, the position of the mobile docking platform is fixed using a steel wire rope and a buckle.

[0017] Further, in step d, the horizontal truss portion is lifted by the fall chain on the mobile docking platform so that the top of the horizontal truss portion contacts the bottom of the mobile docking platform, thereby fixing the horizontal truss portion.

[0018] Furthermore, the fall chain is an electric fall chain.

[0019] The present invention utilizes the corridor above the material yard to construct the material yard with a large-span figure-eight truss structure, divides the large-span figure-eight truss into three parts and hoists them separately, installs a mobile docking platform on the corridor, fixes the horizontal truss part that is hoisted first on the mobile docking platform, and then hoists the oblique truss parts on both sides separately and splices them with the horizontal truss parts to form a complete large-span figure-eight truss structure.

[0020] Due to the use of split lifting and assembly methods, the tonnage requirement for the crane is relatively low, and after the large-span eight-shaped truss structure is split, it is not assembled as a whole on the ground. The placement and angle requirements are relatively random, which will not affect the position of the crane, and the process of turning over and standing up is eliminated, so the lifting difficulty is small.

[0021] Since the splicing of the horizontal truss part and the oblique truss parts on both sides is carried out after the horizontal truss is fixed on the mobile docking platform, the position and levelness of the horizontal truss part can be effectively guaranteed. The oblique truss is adjusted in position and angle by the crane, and the stress is small and no large deformation will occur. After being lowered and fixed and the support and purlins are built, the overall shape of the material yard can be guaranteed. The support and purlins can also be hoisted and installed using the mobile docking platform, and the crane can be used for other construction, which improves the utilization rate of the crane and reduces the construction cost.

[0022] The present invention makes full use of the existing corridor structure above the material yard, reduces the difficulty of hoisting the large-span figure-eight truss, and is easy to ensure the shape and position accuracy of the large-span figure-eight truss structure, and the safety risk and cost of the construction process are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the fixed horizontal truss part of the mobile docking platform of the present invention.

[0024] Figure 2 It is a schematic diagram of the splicing of the horizontal truss part and the oblique truss part of the present invention.

[0025] Figure 3 It is a structural diagram of the corridor of the present invention.

[0026] Figure 4 yes Figure 3 Left view of .

[0027] In the figure: 1. bracket; 2. corridor; 3. mobile docking platform; 4. horizontal truss part; 5. inclined truss part; 6. crane; 7. rope; 3-1. mobile frame; 3-2. platform frame; 3-3. hanger; 3-4. roller. DETAILED DESCRIPTION

[0028] It is a common layout to arrange a steel structure belt conveyor corridor 2 above the material yard. A truck crane is generally used for the construction of the corridor 2, and a truck crane is also needed for the construction of the material yard with a large-span figure-eight truss structure as the main body. Therefore, the construction of the two can be combined together. The corridor 2 structure located directly above the material yard can just serve as an auxiliary platform for the construction of the large-span figure-eight truss structure. The present invention utilizes the corridor 2 above the material yard and proposes a new large-span figure-eight truss structure material yard construction method.

[0029] like Figure 1 , Figure 2 As shown, the method includes the following steps.

[0030] a. First, hoist the corridor 2 above the material yard and fix the corridor 2 on the brackets 1 at both ends. For details on the structure of the corridor 2 and the bracket 1, see Figure 3 , Figure 4, both ends of the corridor 2 are fixed on the bracket 1.

[0031] b. A mobile docking platform 3 is installed on the corridor 2. The mobile docking platform 3 includes a mobile frame 3-1. The corridor 2 is located in the mobile frame 3-1, and the corridor 2 can move along the length direction of the corridor 2. A horizontal platform frame 3-2 is installed at the lower end of the mobile frame 3-1, and hangers 3-3 are respectively provided at both ends of the platform frame 3-2. A fall chain is installed on the hanger 3-3.

[0032] Among them, the moving frame 3-1 is a rectangular frame structure, the platform frame 3-2 and the hanger 3-3 are truss structures, and the hanger 3-3 is located above the platform frame 3-2. Rollers 3-4 are arranged on the top of the moving frame 3-1. The rollers 3-4 are in contact with the top surface of the corridor 2 so that the rectangular frame can move along the length direction of the corridor 2.

[0033] The mobile docking platform 3 is hoisted and installed by a crane 6. The mobile frame 3-1 and the platform frame 3-2 are detachably connected. In order to ensure the reliability of the connection, the two are connected by evenly distributed high-strength bolts and reinforced by temporary reinforcement devices.

[0034] After the position of the mobile docking platform 3 on the corridor 2 is determined, the position of the mobile docking platform 3 is fixed using a steel wire rope and a buckle.

[0035] c. The figure eight truss is divided into a middle horizontal truss part 4 and two side oblique truss parts 5 which are prepared and transferred to corresponding positions on the ground.

[0036] The horizontal truss part 4 and the oblique truss part 5 can be prefabricated in advance in the factory and transported to the construction site. The split figure-eight truss reduces the difficulty of lifting and is easy to adjust the position and angle.

[0037] d. Move the mobile docking platform 3 to the predetermined position of the figure eight truss, lift the horizontal truss part 4 to the bottom of the mobile docking platform 3 by the crane 6, and fix the horizontal truss part 4 to the bottom of the mobile docking platform 3 with the fall chain on the mobile docking platform 3.

[0038] Connect the two fall chains to the horizontal truss part 4, lift the horizontal truss part 4, and make the top of the horizontal truss part 4 contact the bottom of the mobile docking platform 3, so as to fix the horizontal truss part 4 and prevent the horizontal truss part 4 from shaking during the subsequent splicing process, which affects the splicing accuracy. At the same time, after the top of the horizontal truss part 4 contacts the bottom of the platform frame 3-2, the horizontality of the horizontal truss part 4 can be ensured.

[0039] e. Use the crane 6 to lift the oblique truss parts 5 on both sides respectively, adjust the angle of the oblique truss part 5 and dock and fix it with the horizontal truss part 4 to form a complete figure eight truss.

[0040] When the inclined truss part 5 is lifted by the crane 6, the hook of the crane 6 is connected to the inclined truss through multiple ropes 7, and a fall chain is provided between the ropes 7 and the inclined truss. The length of each rope 7 is adjusted by the fall chain to adjust the angle of the inclined truss.

[0041] During the docking process, the platform frame 3-2 serves as a transfer platform for high-altitude construction workers and a safety measure connection platform, which can effectively ensure the life safety of the construction workers and reduce the difficulty of high-altitude operations.

[0042] f. Adjust the height of the figure eight truss by using the fall chain, and lower the figure eight truss to the ground or the supporting structure on the ground.

[0043] During the lowering process, always check the position and angle of the figure eight truss and adjust it in time.

[0044] j. Repeat steps d~f to install all the figure eight trusses in the material yard.

[0045] h. After checking that the position and shape of the figure-eight trusses are correct, use the mobile docking platform 3 to install the support and purlin structure between the figure-eight trusses.

[0046] i. After the overall construction of the material yard is completed, the mobile docking platform 3 is dismantled.

[0047] Among them, the fall chain is an electric fall chain.

[0048] The present invention utilizes the corridor 2 above the material yard to construct a large-span figure-eight truss structure material yard, divides the large-span figure-eight truss into three parts and hoists them separately, installs a mobile docking platform 3 on the corridor 2, fixes the horizontal truss part 4 that is hoisted first on the mobile docking platform 3, and then hoists the inclined truss parts 5 on both sides separately and splices them with the horizontal truss part 4 to form a complete large-span figure-eight truss structure.

[0049] Due to the split lifting and assembly method, the tonnage requirement of the crane 6 is relatively low, and after the large-span eight-shaped truss structure is split, it is not assembled as a whole on the ground. The placement position and angle requirements are relatively random, which will not affect the position of the crane 6, and the process of turning over and standing up is eliminated, and the lifting difficulty is small.

[0050] Since the splicing of the horizontal truss part 4 and the oblique truss parts 5 on both sides is carried out after the horizontal truss is fixed on the mobile docking platform 3, the position and horizontality of the horizontal truss part 4 can be effectively guaranteed, and the oblique truss is adjusted in position and angle by the crane 6, and the stress is small and no large deformation occurs. After being lowered and fixed and the support and purlins are built, the overall shape of the material yard can be guaranteed. The support and purlins can also be hoisted and installed using the mobile docking platform 3, and the crane 6 can be used for other construction, thereby improving the utilization rate of the crane 6 and reducing the construction cost.

[0051] The present invention makes full use of the existing corridor 2 structure above the material yard, reduces the difficulty of hoisting the large-span figure-eight truss, and is easy to ensure the shape and position accuracy of the large-span figure-eight truss structure, and the safety risk and cost of the construction process are low.

Claims

1. A large-span eight-shaped truss structure material yard construction method, characterized in that: The following steps are involved: a. First, hoist the corridor above the material yard and fix it on the brackets at both ends; b. Install a mobile docking platform on the corridor, the mobile docking platform includes a mobile frame, the corridor is located in the mobile frame, and the corridor can move along the length of the corridor, a horizontal platform frame is installed at the lower end of the mobile frame, and hangers are respectively provided at both ends of the platform frame, and a fall chain is installed on the hanger; c. The figure eight truss is divided into a middle horizontal truss part and two side oblique truss parts, which are prepared and moved to the corresponding positions on the ground; d. Move the mobile docking platform to the predetermined position of the figure eight truss, lift the horizontal truss part to the bottom of the mobile docking platform by a crane, and fix the horizontal truss part to the bottom of the mobile docking platform with the fall chain on the mobile docking platform; e. Use a crane to lift the oblique truss parts on both sides respectively, adjust the angle of the oblique truss parts and connect and fix them with the horizontal truss parts to form a complete figure eight truss; f. Adjust the height of the figure eight truss by using the fall chain, and lower the figure eight truss to the ground or the supporting structure on the ground; j. Repeat steps d~f to install all the figure eight trusses in the material yard; h. After checking that the position and shape of the figure-eight trusses are correct, use the mobile docking platform to install the support and purlin structure between the figure-eight trusses; i. After the overall construction of the material yard is completed, the mobile docking platform will be removed.

2. The large-span eight-shaped truss structure material yard construction method according to claim 1 is characterized in that: The movable frame is a rectangular frame structure, the platform frame and the hanger are truss structures, and the hanger is located above the platform frame. Rollers are arranged on the top of the movable frame, and the rollers are in contact with the top surface of the corridor so that the rectangular frame can move along the length direction of the corridor.

3. The large-span eight-shaped truss structure material yard construction method according to claim 1 is characterized in that: In step e, when the crane is used to lift the inclined truss part, the hook of the crane is connected to the inclined truss through multiple ropes, and a fall chain is provided between the ropes and the inclined truss. The angle of the inclined truss is adjusted by adjusting the length of each rope through the fall chain.

4. The large-span eight-shaped truss structure material yard construction method according to claim 1 is characterized in that: After the position of the mobile docking platform on the corridor is determined, the position of the mobile docking platform is fixed using a steel wire rope and a buckle.

5. The large-span eight-shaped truss structure material yard construction method according to claim 1 is characterized in that: In step d, the horizontal truss section is lifted by the fall chain on the mobile docking platform so that the top of the horizontal truss section contacts the bottom of the mobile docking platform, thereby fixing the horizontal truss section.

6. The large-span eight-shaped truss structure material yard construction method according to claim 1 is characterized in that: The fall chain is an electric fall chain.

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