Method for unloading broken column in joist column pulling process

Abstract

The invention relates to a method for unloading a broken column in a joist column pulling process, which comprises the following steps of: arranging a fixed truss below a crane beam, and preliminarily supporting the crane beam; corbels are arranged at the first position and the second position of the latticed column to be cut, and the position to be cut is located between the first position and the second position; a jacking component is installed between the two brackets, and the jacking component is controlled to be gradually loaded to preset internal force; the to-be-cut position of the to-be-cut latticed column is cut; and the jacking component is gradually unloaded until the load is completely transferred to the fixed truss. According to the method for unloading the broken column in the joist column pulling process, construction of temporary supporting columns at the two ends is omitted, in the process of cutting off the to-be-cut latticed column, the internal force of the to-be-cut latticed column at the section cutting position is basically zero, the gravity of an upper structure of a plant after cutting is gradually converted into stress of a fixed truss, the whole process is safe and reliable, and the fixed truss is not prone to being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical steel structures, in particular to a method for unloading broken columns in the process of beam shoring and column pulling. Background Art

[0002] In recent years, with the environmental protection transformation and product structure adjustment, the steel industry needs to upgrade the original process equipment. The column distance of the original factory building is too small or the location is blocked, which brings difficulties to the installation of equipment. Some columns must be removed to form a larger column distance space.

[0003] Among them, in the column breaking process, in order to ensure the stability of the factory building and construction and installation, the conventional practice is to set up temporary supports about 2m away from the columns on both sides of the columns, use jacks to make the replacement trusses and temporary columns bear force at the temporary supports, then cut off the original factory building columns, and finally remove the temporary supports. This removal method is prone to stress mutation problems, which can easily lead to damage to the replacement trusses and temporary columns. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a method for unloading broken columns during the process of supporting beams and pulling out columns, which saves the construction of temporary pillars at both ends, and in the process of cutting the lattice columns to be cut, the internal force of the lattice columns to be cut at the cutting section is basically zero. After cutting, the gravity of the upper structure of the factory building is gradually transferred to the fixed truss to bear the force. The whole process is safe and reliable, and the fixed truss is not easily damaged.

[0005] The present invention provides a method for unloading broken columns during the process of beam joist and column extraction, comprising the following steps:

[0006] A fixed truss is set under the traveling beam to provide preliminary support for the traveling beam;

[0007] Corbels are arranged at the first position and the second position of the lattice column to be cut, wherein the position to be cut is located between the first position and the second position;

[0008] Installing a jacking member between the two corbels, and controlling the jacking member to be gradually loaded to a preset internal force;

[0009] Cutting the to-be-cut position of the to-be-cut lattice column;

[0010] The hydraulic jacks are gradually unloaded until the load is completely transferred to the fixed truss.

[0011] In one embodiment, the corbels are arranged at the first position and the second position of the lattice column to be cut, wherein the position to be cut is located between the first position and the second position, further comprising:

[0012] Determining the position to be cut on the lattice column to be cut;

[0013] Determine the first position and the second position according to the position to be cut;

[0014] Corbels are arranged at the first position and the second position.

[0015] In one embodiment, the step of installing a lifting member between the two corbels and controlling the lifting member to be gradually loaded to a preset internal force further comprises:

[0016] The lifting component is gradually loaded with internal force, and during the internal force loading process, the displacement of the corbel and the pressure acting on the corbel are monitored;

[0017] Until the lifting component is loaded to the preset internal force.

[0018] In one embodiment, the lifting member is gradually unloaded until the load is completely transferred to the fixed truss, further comprising:

[0019] Unload 30% of the internal force three times each time;

[0020] The internal force was unloaded by 5% each time for the last two times so that the load was completely transferred to the fixed truss.

[0021] In one embodiment, the method for unloading broken columns during the process of joist beam and column extraction further includes:

[0022] Reinforcement does not require cutting of lattice columns before cutting.

[0023] In one embodiment, the method for unloading broken columns during the process of joist beam and column extraction further includes:

[0024] While the corbels are being arranged, a lateral guide plate is also arranged on one of the corbels, and the guide plates are arranged in close contact on both sides of the guide plates.

[0025] The method for unloading broken columns during the process of beam support and column pulling provided by the present invention saves the construction of temporary pillars at both ends, and in the process of cutting the lattice columns to be cut, the internal force of the lattice columns to be cut at the cutting section is basically zero, and after cutting, the gravity of the upper structure of the factory building is gradually transferred to the fixed truss for stress bearing, the whole process is safe and reliable, and the fixed truss is not easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1A schematic diagram of a method for unloading broken columns during the process of beam support and column removal provided by the present invention.

[0028] Figure 2 The method for unloading broken columns in the process of beam support and column pulling provided by the present invention Figure 1 Top view of the . DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0032] The terms "first", "second", "third", etc. are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0033] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0034] Before understanding the method, a brief introduction is given to the structure of the crane beam. The crane beam consists of a crane track, which is used for the movement of the crane. A lattice column is connected between the crane and the ground. The lattice column is used to support the crane beam. The upper end of the lattice column can be welded to the crane beam, and the lower end of the lattice column can be pre-buried in a concrete foundation underground.

[0035] See also Figure 1 and Figure 2The method for unloading broken columns during the process of joist beam and column pulling provided by the present invention comprises the following steps:

[0036] S1, a fixed truss is set under the traveling beam to provide preliminary support for the traveling beam.

[0037] It can be understood that before the fixed truss is moved downward, the lattice columns do not need to be cut for reinforcement. The reinforcement method can be to reinforce the ground surface and the concrete foundation. At the same time, the lattice columns that do not need to be cut can be welded and reinforced with the traveling beam again to avoid overall instability after the subsequent lattice columns to be cut are cut. The initial support in this embodiment can be that the fixed truss is fitted under the traveling beam, but the weight of the traveling beam has not yet been transferred to the fixed truss.

[0038] S2, corbels are arranged at the first position and the second position of the lattice column 1 to be cut, wherein the position 3 to be cut is located between the first position and the second position.

[0039] It is understandable that the above steps may further include:

[0040] S201, determining a position 3 to be cut on a lattice column 1 to be cut.

[0041] It can be understood that the position 3 to be cut can be the position of the lattice column to be cut close to the traveling beam, and after being determined, it can be marked by drawing a line.

[0042] S202, determining a first position and a second position according to the position 3 to be cut.

[0043] It can be understood that the distances between the first position and the second position and the position to be cut 3 can be consistent.

[0044] S203, placing the corbels 2 at the first position and the second position, and placing a lateral guide plate 6 on one of the corbels while placing the corbels 2, and the guide plate 6 is placed close to both sides of the lattice column 1 to be cut.

[0045] It is understandable that the corbel 2 can be welded at the first position and the second position respectively, and the stiffening plate 5 can also be welded on the corbel to improve the strength of the corbel 2. The guide plate 6 can well limit the displacement of the lattice column 1 to be cut after cutting.

[0046] S3, installing the lifting member 4 between the two corbels 2, and controlling the lifting member 4 to be gradually loaded to a preset internal force,

[0047] It is understandable that the above steps may further include:

[0048] S301 , the lifting component 4 gradually loads internal force, and during the internal force loading process, monitors the displacement of the corbel 2 and the pressure acting on the corbel 2 .

[0049] It can be understood that the lifting component 4 is gradually loaded by controlling the computer human-machine interface. The lifting component 4 can be a hydraulic jack. The number of hydraulic jacks can be four, and the four are loaded synchronously. According to the theoretical value of the designed internal force, the internal force is loaded in the above 6 levels of 10%, 20%, 40%, 60%, 80% and 90%. After each level of loading is completed, it is observed for 5 to 10 minutes, and the relevant data is monitored by the pressure sensor and the displacement sensor. When the loading reaches 90%, the loading is stopped and the oil pump is locked.

[0050] S302, until the lifting component 4 is loaded to a preset internal force.

[0051] S4 is to cut the to-be-cut position 3 of the to-be-cut lattice column 1 .

[0052] It can be understood that the cutting may be performed by using flame cutting equipment until the lattice column 1 to be cut is cut off.

[0053] S5, the lifting member 4 is gradually unloaded until the load is completely transferred to the fixed truss.

[0054] It is understandable that the above steps may further include:

[0055] S501, unload 30% of the internal force three times each time.

[0056] S502, unload 5% of the internal force each time for the last two times so that the load is completely transferred to the fixed truss.

[0057] It can be known that when the load is unloaded, it can be divided into five times. The unloading can be 30%, 30%, 30%, 5% and 5% in sequence. After the unloading is completed, the load of the crane beam is completely located on the fixed truss. The pressure and displacement in each stage are controlled by the computer (out-of-tolerance alarm, automatic cutoff). After the unloading of each stage is completed, it is observed for 5 to 10 minutes and other relevant data are monitored. The monitoring data may include the deformation condition of the fixed truss, etc.

[0058] Repeat the above steps 1 to 5 to complete the unloading and cutting of other lattice columns to be cut. After unloading is completed, the hydraulic jack is separated from the structure, and the unloading system equipment and the lower temporary structure are removed.

[0059] From the above description, it can be known that the method for unloading broken columns during the process of supporting beams and pulling out columns provided by the present invention saves the construction of temporary pillars at both ends, and in the process of cutting the lattice columns to be cut, the internal force of the lattice columns to be cut at the cutting section is basically zero, and after cutting, the gravity of the upper structure of the factory building is gradually transferred to the fixed truss to bear the force, and the whole process is safe and reliable, and the fixed truss is not easily damaged.

[0060] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A method for unloading broken columns during the process of beam support and column extraction, characterized in that: The steps include: A fixed truss is set under the traveling beam to provide preliminary support for the traveling beam; Corbels are arranged at the first position and the second position of the lattice column to be cut, wherein the position to be cut is located between the first position and the second position; Installing a jacking member between the two corbels, and controlling the jacking member to be gradually loaded to a preset internal force; Cutting the to-be-cut position of the to-be-cut lattice column; The top of the lifting member is gradually unloaded until the load is completely transferred to the fixed truss.

2. The method for unloading broken columns during beam support and column removal as claimed in claim 1, characterized in that: The method of arranging corbels at the first position and the second position of the lattice column to be cut, wherein the position to be cut is located between the first position and the second position, further comprises: Determining the position to be cut on the lattice column to be cut; Determine the first position and the second position according to the position to be cut; Corbels are arranged at the first position and the second position.

3. The method for unloading broken columns during beam support and column removal as claimed in claim 1, characterized in that: The step of installing a jacking member between the two corbels and controlling the jacking member to be gradually loaded to a preset internal force further comprises: The lifting component is gradually loaded with internal force, and during the internal force loading process, the displacement of the corbel and the pressure acting on the corbel are monitored; Until the lifting component is loaded to the preset internal force.

4. The method for unloading broken columns during beam support and column removal as claimed in claim 1, characterized in that: The lifting member is gradually unloaded until the load is completely transferred to the fixed truss, further comprising: Unload 30% of the internal force three times each time; The internal force was unloaded by 5% each time for the last two times so that the load was completely transferred to the fixed truss.

5. The method for unloading broken columns during beam support and column removal as claimed in claim 1, characterized in that: The method for unloading broken columns during the process of beam support and column extraction also includes: Reinforcement does not require cutting of lattice columns before cutting.

6. The method for unloading broken columns during beam support and column removal as claimed in claim 1, characterized in that: The method for unloading broken columns during the process of beam support and column extraction also includes: While the corbels are arranged, a lateral guide plate is also arranged on one of the corbels, and the guide plate is arranged in close contact with both sides of the lattice column to be cut.

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