Construction method for safely and conveniently dismantling latticed column

Abstract

The invention discloses a safe and convenient dismantling construction method for a latticed column. The method comprises the steps that two hanging rings are installed on a floor slab above one side of a section of latticed column; a lifting device is installed on one hanging ring close to one section of latticed column, and a sling of the lifting device is connected to the upper end of one section of latticed column; obliquely cutting the upper end of one section of latticed column; the sling is tensioned, so that the sling of the lifting device is stressed and tied to the upper end of one section of the cut latticed column; the lower end of one section of latticed column is horizontally cut; the other lifting device is installed on the other hanging ring, and a sling of the other lifting device is stressed and tied to the lower end of the cut latticed column; lowering a sling of the lifting device; the sling of the other lifting device is shrunk, so that one section of the cut latticed column is horizontally arranged; the slings of the two lifting devices are lowered so that one section of latticed column can be placed on the next floor in a lying posture. The problem that a traditional latticed column dismantling method has large vibration influence on a main body structure is solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a safe and convenient dismantling construction method for a lattice column. Background Art

[0002] With the development of cities, more and more subways are being built to ease traffic pressure. During the construction of subway stations, in order to ensure safe construction, the use of temporary columns (lattice columns) is inevitable. The traditional lattice column removal on site adopts the method of laying down the whole column for construction, placing tires or rubber on the bottom plate or middle plate for buffering, and the vibration is large. This construction method has a certain impact on the main structure plate.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] In order to overcome the defects of the prior art, a safe and convenient lattice column removal construction method is provided to solve the problem that the traditional lattice column removal method has a significant impact on the vibration of the main structure.

[0005] In order to achieve the above object, a safe and convenient lattice column dismantling construction method is provided, comprising the following steps:

[0006] Installing two hanging rings on the floor slab above one side of a lattice column, wherein the two hanging rings are arranged along the radial direction of the lattice column;

[0007] Installing a lifting device on a hanging ring close to the one section of the lattice column, and connecting the sling of the lifting device to the upper end of the one section of the lattice column;

[0008] In the row direction of the two hanging rings, an oblique cut is made at the upper end of the one section of the lattice column, so that a lattice column buttress is formed at the bottom of the floor slab;

[0009] Tensioning the sling of the lifting device so that the sling of the lifting device is pulled and tied to the upper end of the cut section of the lattice column;

[0010] Cutting flatly at the lower end of the lattice column section;

[0011] Install another lifting device on another hanging ring, and tie the sling of the other lifting device to the lower end of the cut lattice column;

[0012] Lowering the sling of the lifting device so that the upper end of the cut lattice column section is turned toward the other side of the lattice column section;

[0013] Contracting the sling of the other lifting device so that the cut section of the lattice column is laid flat;

[0014] The slings of the two lifting devices are lowered to place the section of lattice column in a lying position on the floor slab of the next layer.

[0015] Furthermore, the lifting device is a hand winch.

[0016] Furthermore, the upper end of the lattice column section is cut obliquely upward at an angle of 45°.

[0017] Furthermore, the hanging ring is connected with an anchor rod, and the anchor rod is pre-buried in the floor slab.

[0018] The beneficial effect of the present invention is that the safe and convenient dismantling construction method of the lattice column of the present invention is suitable for the dismantling construction of lattice columns in underground projects. The safe and convenient dismantling construction method of the lattice column of the present invention avoids the vibration of the structural plate and reduces the damage to the structural plate. The safe and convenient dismantling construction method of the lattice column of the present invention can solve the problem of vibration damage to the structural plate caused by the traditional lattice column whole-piece dismantling construction method. When the construction of the middle plate or top plate of the station structure is completed, the traditional lattice column dismantling method is to place shock-absorbing facilities such as tires on the bottom plate and the middle plate, but the lattice column will inevitably cause vibration damage to the structural plate when it is laid down. However, by pre-embedding the hanging ring in advance and using an electric hoist to lift it, the vibration of the structural plate can be effectively avoided. Whether in subway station projects or other basement structure projects, the lattice column can be slowly lifted to the structural plate. In particular, it is recommended to use the method of the present invention in projects with large underground structure clearance, which can avoid damage to the structural plate and ensure the quality of the structural plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0020] Figure 1 The arrival Figure 4 The present invention is a schematic diagram of the steps of a safe and convenient lattice column removal construction method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the inventions. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Reference Figures 1 to 4 As shown, the present invention provides a safe and convenient lattice column dismantling construction method, comprising the following steps:

[0024] S1. Install two hanging rings 3 on the floor slab 2 above one side of a lattice column 1. The two hanging rings 3 are arranged along the radial direction of the lattice column 1.

[0025] As a preferred implementation, the hanging ring 3 is connected with an anchor rod, and the anchor rod is pre-buried in the floor slab 2 .

[0026] S2, installing a lifting device 5 on a hanging ring 3 close to a lattice column 1, and connecting the sling of the lifting device 5 to the upper end of a lattice column 1.

[0027] As a preferred embodiment, the lifting device 5 is a hand chain hoist or an electric hoist.

[0028] S3. In the row direction of the two hanging rings 3, an oblique cut is made at the upper end of a section of the lattice column 1, so that a lattice column pier 4 is formed at the bottom of the floor slab 2.

[0029] As a preferred embodiment, the upper end of a lattice column 1 is cut obliquely upward at an angle of 45°.

[0030] S4, tightening the sling of the lifting device 5 so that the sling of the lifting device 5 is tied to the upper end of the cut lattice column 1.

[0031] S5. Make a horizontal cut at the lower end of a lattice column 1.

[0032] S6. Install another lifting device 5 on another hanging ring 3, and tie the sling of the other lifting device 5 to the lower end of the cut lattice column 1.

[0033] S7, lowering the sling of the lifting device 5 so that the upper end of the cut lattice column section 1 is turned toward the other side of the lattice column section 1.

[0034] S8, retract the sling of another lifting device 5 so that the cut section of the lattice column 1 is laid flat.

[0035] 9. The slings of the two lifting devices 5 are lowered to place a section of the lattice column 1 in a lying position on the floor slab 2 of the next layer.

[0036] The safe and convenient dismantling construction method of the lattice column of the present invention reduces interference with the structural bottom plate and the middle plate, reduces safety hazards, improves construction efficiency, and ensures construction quality and progress by reasonably planning the construction sequence and technical measures of the dismantling. The construction method will be analyzed below.

[0037] A sling is pulled from the 2# electric hoist (the electric hoist far away from the lattice column) to pull the lower end of the lattice column. A hook is provided at the end of the sling. The lower end of the lattice column is also tied up with a wire rope, and the 2# electric hoist is put under stress. A sling is set on each side of the front and back of the lattice column to prevent it from tipping over. Then the 1# electric hoist is loosened by 30 to 50 cm to make the lattice column tip to the right.

[0038] The 1# electric hoist continues to be lowered for 10-20cm and remains motionless, and a sling is tightened on the front and rear sides of the lattice column to prevent it from tipping forward and backward. Then the 2# electric hoist pulls the bottom of the lattice column and pulls the bottom of the lattice column away from the top of the remaining lattice column, so that the lattice column is completely off the ground without support.

[0039] Keep the 2# electric hoist still, slowly lower the 1# electric hoist, and place 12cm×12cm square wood at the bottom. The height of the square wood should be the same as the cut lattice column head.

[0040] Continue to keep the 2# electric hoist stationary, lower the 1# electric hoist, and make the dismantled lattice column in a horizontal state; then lower the 1# electric hoist and the 2# electric hoist at the same time and speed, place them steadily on the supporting square timbers and then transport them away.

[0041] Re-erect the working scaffolding and dismantle the remaining top lattice columns using the method in (the first step); cut the remaining bottom lattice columns to complete the lattice column dismantling.

[0042] In order to reduce the impact of lattice column removal on the structure, two Φ32 steel bar hanging rings are embedded in the middle plate or top plate near the lattice column to be removed, and are slowly lowered by a hand winch "pulling and dragging" to reduce the impact on the structure.

[0043] The safe and convenient lattice column dismantling construction method of the present invention adopts a pre-buried hanging ring method for dismantling, thereby avoiding the vibration of the lattice column to the structural plate in the traditional dismantling method.

[0044] The safe and convenient lattice column dismantling construction method of the present invention adopts two electric hoists and two slings for dismantling, thereby avoiding the lattice column collapse accident, reducing safety hazards and improving the safety factor.

[0045] The lattice column safe and convenient dismantling construction method of the present invention adopts the method of dismantling the lattice columns of each layer in their entirety, thereby ensuring the integrity of the lattice columns, making them reusable, and improving the reuse rate of materials.

[0046] The safe and convenient lattice column dismantling construction method of the present invention embeds two Φ32 round steel hanging rings near the lattice columns during the construction of the middle plate top plate of the subway station structure, and simultaneously uses two electric hoists to slowly lower and dismantle the lattice columns in a "one-pull-one-drag" and "one-pull-one-release" manner, which can effectively reduce interference with the structural bottom plate and the middle plate, avoid damage to the structural plate, reduce safety hazards, improve construction efficiency, and ensure construction quality and progress.

[0047] The safe and convenient lattice column dismantling construction method of the present invention is suitable for the dismantling construction of temporary columns (lattice columns) in underground projects. The safe and convenient lattice column dismantling construction method of the present invention avoids vibration of the structural plate and reduces damage to the structural plate.

[0048] The safe and convenient lattice column removal construction method of the present invention can solve the problem of vibration damage to the structural plate caused by the traditional lattice column removal construction method of laying down the entire column. When the construction of the middle plate or top plate of the station structure is completed, the traditional lattice column removal method is to place shock-absorbing facilities such as tires on the bottom plate and the middle plate, but the lattice column will inevitably cause vibration damage to the structural plate when it is laid down. However, by pre-embedding the hanging ring in advance and using an electric hoist to lift it, the vibration of the structural plate can be effectively avoided. Whether in subway station projects or other basement structure projects, the lattice column can be slowly lifted to the structural plate. In particular, it is recommended to use the method of the present invention in projects with large underground structure clearance, which can avoid damage to the structural plate and ensure the quality of the structural plate.

[0049] The lattice column safe and convenient dismantling construction method of the present invention does not require the involvement of multiple people, thus reducing potential safety hazards.

[0050] The safe and convenient lattice column removal construction method of the present invention can solve the problem of damage to the structural plate while reducing the input of personnel. The safe and convenient lattice column removal construction method of the present invention adopts electric hoist pulling to reduce the risk of collapse of the lattice column after cutting is completed, and a sling is set on both sides of the lattice column to prevent the lattice column from tipping forward and backward when the electric hoist is lowered.

[0051] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A safe and convenient lattice column dismantling construction method, characterized in that: The following steps are involved: Installing two hanging rings on the floor slab above one side of a lattice column, wherein the two hanging rings are arranged along the radial direction of the lattice column; Installing a lifting device on a hanging ring close to the one section of the lattice column, and connecting the sling of the lifting device to the upper end of the one section of the lattice column; In the row direction of the two hanging rings, an oblique cut is made at the upper end of the one section of the lattice column, so that a lattice column buttress is formed at the bottom of the floor slab; Tensioning the sling of the lifting device so that the sling of the lifting device is pulled and tied to the upper end of the cut section of the lattice column; A flat cut is made at the lower end of the lattice column section; Install another lifting device on another hanging ring, and tie the sling of the other lifting device to the lower end of the cut lattice column; Lowering the sling of the lifting device so that the upper end of the cut lattice column section is turned toward the other side of the lattice column section; Contracting the sling of the other lifting device so that the cut section of the lattice column is laid flat; The slings of the two lifting devices are lowered to place the section of lattice column in a lying position on the floor slab of the next layer.

2. The safe and convenient lattice column dismantling construction method according to claim 1 is characterized in that: The lifting device is a hand chain hoist.

3. The safe and convenient lattice column removal construction method according to claim 1 is characterized in that: The upper end of the lattice column section is cut obliquely upward at an angle of 45 degrees.

4. The safe and convenient lattice column removal construction method according to claim 1 is characterized in that: The hanging ring is connected with an anchor rod, and the anchor rod is pre-buried in the floor slab.

Images