Load unloading structure and construction method based on cigarette factory reconstruction

Abstract

The present invention belongs to the technical field of factory building reconstruction, and particularly relates to a load-unloading structure based on the reconstruction of a cigarette factory. The structure includes new support columns, new trusses, flexible connectors and rigid connectors. A plurality of new support columns are arranged at intervals beside each old support column, and each new support column is fixed on the ground of the cigarette factory; the new trusses are fixedly laid on the top of each new support column; the flexible connector is arranged in the middle of the old support column, and the flexible connector is used to connect the first working surface of the old support column and the second working surface of the new support column; the rigid connector is arranged in the middle of the old support column, and the rigid connector is used to connect the first working surface of the old support column and the third working surface of the new support column. In addition, the present invention also discloses a construction method of a load-unloading structure based on the reconstruction of a cigarette factory. The present invention prolongs the service life of a cigarette factory building, while reducing the reconstruction cost, and provides an economical, efficient and practical solution for the reconstruction of old cigarette factories.

Description

Technical Field

[0001] The invention belongs to the technical field of factory building reconstruction, and in particular relates to a load unloading structure and a construction method based on the reconstruction of a cigarette factory. Background Art

[0002] As an important place for industrial production, the building structure design of cigarette factories usually needs to meet the long-term and efficient production needs. However, many old cigarette factories are built a long time ago, their service life exceeds the design life or they are facing the need to upgrade production equipment, and their building structures can no longer meet the current load requirements. Especially in the case of continuous upgrading of modern production processes, the new production equipment in cigarette factories is often heavier and larger than traditional equipment, which puts higher requirements on the bearing capacity of the factory roof structure.

[0003] ① Load issues of old buildings When the old support systems of many old cigarette factories were designed and built, their load standards were based on the production needs at the time, and they are difficult to cope with today's production and equipment upgrade needs. With the aging of building materials and the decline in structural performance, the bearing capacity of the support system gradually weakens, which may lead to the following problems. Structural safety hazards: The aging support system may crack, deform or even partially collapse, threatening the safety of the factory and production operations; Insufficient bearing capacity: When subjected to loads exceeding the design, the factory structure may experience significant settlement or deformation, which directly affects the stability of production equipment; Reduced seismic performance: The deterioration of aging materials and connectors leads to insufficient structural seismic resistance, which is especially dangerous in earthquakes or environments with strong vibrations. For special places such as cigarette factories, the existence of structural problems in the factory will directly affect production safety and efficiency, and may also increase maintenance costs. In severe cases, it may even threaten the lives of staff.

[0004] ②Restrictions on factory buildings not being demolished Unlike other industrial plants, cigarette factories are usually not allowed to shut down for a long time or demolish and rebuild on a large scale because of the complexity of continuous production and equipment installation layout. Although the traditional demolition and reconstruction method can solve the problem of insufficient bearing capacity, it will bring the following disadvantages that cannot be ignored. Loss of production suspension: Demolition and reconstruction requires a long suspension of production, which has a serious impact on the benefits of the enterprise; High cost: The cost of comprehensive demolition and reconstruction of new plants is usually higher than that of local reinforcement and reconstruction; Complex construction: When dismantling the plant, the production line equipment needs to be dismantled and reinstalled, which increases the difficulty of construction; Therefore, without affecting production, it is necessary to transform the plant through the design and construction technology of the new support system.

[0005] ③Deficiencies of traditional reinforcement solutions In the reinforcement and renovation of old industrial plants, existing technologies mainly focus on strengthening existing structures, such as using reinforced concrete to cover the original columns, increasing the foundation area around the supporting columns, or adding auxiliary steel structures under the old trusses. However, these methods have obvious limitations. Difficulty in load redistribution: Traditional reinforcement methods only increase the bearing capacity of a single structural component, fail to effectively transfer the load, and may still cause local structural overload; Limited effect: The bearing capacity of the old support system after reinforcement is still limited by the aging of raw materials, and it is difficult to meet long-term use requirements.

[0006] In order to solve the problem of insufficient bearing capacity of the old support system, designing and installing new support columns and new trusses inside the factory is an effective solution. The core idea of ​​this method is to transfer the load borne by the old support system to the new support system through the construction of the new support system, so as to achieve the purpose of "load unloading". It can be seen that the development of a load unloading structure and construction method specifically for the transformation of cigarette factories can not only solve the problem of insufficient bearing capacity of the old support system, but also realize the rapid transformation and safe upgrade of the factory, which has important technical value and practical significance. Summary of the invention

[0007] In order to solve the problem of insufficient bearing capacity of the old support system of old cigarette factories in the prior art, the present invention provides a load unloading structure and construction method suitable for the transformation of cigarette factories. By designing and installing a new support system, the load borne by the original structure is gradually transferred to the new support system, and the old support system is unloaded, thereby improving the overall bearing capacity and safety of the factory building. The present invention prolongs the service life of the cigarette factory building, while reducing the transformation cost and construction period, and provides an economical, efficient and practical solution for the transformation of old cigarette factories.

[0008] To achieve the above purpose, the technical solution adopted is: The present invention provides a load unloading structure based on the transformation of a cigarette factory, comprising: New support columns, wherein a plurality of new support columns are arranged at intervals beside each of the old support columns, and each of the new support columns is fixed on the ground of the cigarette factory; New trusses, which are fixed and laid on top of each new support column; A flexible connector, which is arranged in the middle of the old support column, and is used to connect the first working surface of the old support column and the second working surface of the new support column, and the flexible connector can be telescopically slidable in the vertical direction; And a rigid connector, which is arranged in the middle of the old support column, and the rigid connector is used to connect the first working surface of the old support column and the third working surface of the new support column.

[0009] According to the load-unloading structure based on the transformation of a cigarette factory of the present invention, further, the new support column is a square steel column, the old support column is a square concrete column, the first working surface of the old support column and the second working surface of the new support column are parallel to each other, and the second working surface and the third working surface of the new support column are perpendicular to each other.

[0010] According to the load unloading structure based on the transformation of the cigarette factory of the present invention, further, the flexible connector and the rigid connector are both located at the same height position of the first working surface of the old support column, and the rigid connector is located on the side of the flexible connector.

[0011] According to the load-unloading structure based on the transformation of the cigarette factory of the present invention, further, the flexible connecting member includes a first connecting plate and a second connecting plate, the first connecting plate is fixed on the first working surface of the old support column, the second connecting plate is fixed on the second working surface of the new support column, and the first connecting plate and the second connecting plate are slidably connected along the vertical direction.

[0012] According to the load unloading structure based on the transformation of the cigarette factory of the present invention, further, the first connecting plate is provided with a first strip hole in the vertical direction, the second connecting plate is provided with a second strip hole in the vertical direction, and the first strip hole and the second strip hole are connected by bolts.

[0013] According to the load unloading structure based on the transformation of a cigarette factory of the present invention, further, the first connecting plate is a T-shaped steel, and the second connecting plate is an I-shaped steel.

[0014] According to the load-unloading structure based on the transformation of the cigarette factory of the present invention, further, the rigid connecting member is an angle steel, one end of the angle steel is fixed on the first working surface of the old support column, and the other end is fixed on the third working surface of the new support column.

[0015] According to the load unloading structure based on the transformation of a cigarette factory of the present invention, further, the new truss is a multi-section structure.

[0016] The present invention also discloses a construction method applicable to the above-mentioned load unloading structure based on the transformation of a cigarette factory, comprising the following steps: a. Dismantle the existing pipelines in the cigarette factory; b. Accurately measure and determine the relative positions of the old and new support columns, as well as the positions of other details; c. Strengthen the ground, excavate to the base elevation, and pour reinforced concrete foundation; d. Fixing an anchor bolt on the ground next to the old support column; e. The new support column is vertically fixed to the anchor bolt next to the old support column by an anchor bolt; f. The one end of the flexible connector is fixed to the first working surface of the old support column, and the other end of the flexible connector is fixed to the second working surface of the new support column; g. One end of the rigid connector is fixed to the first working surface of the old support column, and the other end of the rigid connector is fixed to the third working surface of the new support column; h. Fix the new trusses to the top of each new support column in multiple times, and install the original pipelines to the new trusses.

[0017] The beneficial effects achieved by adopting the above technical solution are: The present invention effectively unloads the load of the old support system. By adding new support columns and new trusses, the load borne by the old support columns and trusses is transferred to the new support system, which significantly reduces the bearing pressure of the old support system, extends its service life, and avoids structural failure problems caused by excessive loads.

[0018] The flexible connection design of the present invention realizes the adaptive connection between the new and old support columns by sliding connection, which can alleviate the stress concentration problem caused by settlement or temperature change and ensure the coordination of the new and old support systems during the transformation process and subsequent use. The rigid connector provides additional fixed support, further enhancing the overall stability of the structure.

[0019] The structural design and construction method of the present invention take into account the limited construction space and complex pipeline layout inside the cigarette factory, and provide a flexible and efficient solution, making it suitable for the structural renovation needs of most old cigarette factories. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention, wherein the drawings are only used to illustrate some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0021] Figure 1 is a schematic diagram of the positional relationship between the old support column and the new support column of the present invention; Figure 2 is a partial side view of the connection relationship between the old support column and the new support column of the present invention; Figure 3 is a top view of the connection relationship between the old support column and the new support column of the present invention; The meanings of the numbers in the figure are: 1. old support column, 101. first connecting plate, 1011. first strip hole, 111. first working surface; 2. New support column, 201. Second connecting plate, 2011. Second strip hole, 211. Second working surface, 212. Third working surface; 3. Flexible connector, 4. Rigid connector, 5. Old truss, 6. New truss. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings of specific embodiments of the present invention to clearly and completely describe the exemplary scheme of the embodiment of the present invention. Unless otherwise defined, the technical terms or scientific terms used in the present invention should be the common meanings understood by people with ordinary skills in the field.

[0023] like Figure 1-Figure 2 As shown, the load-unloading structure based on the transformation of the cigarette factory of the present invention includes a new support column 2, a new truss 6, a flexible connector 3 and a rigid connector 4. A plurality of new support columns 2 are arranged at intervals beside each old support column 1, and each new support column 2 is fixed on the ground of the cigarette factory; the new truss 6 is fixed and laid on the top of each new support column 2 by bolts; the flexible connector 3 is welded to the middle of the old support column 1, and the flexible connector 3 is used to connect the first working surface 111 of the old support column 1 and the second working surface 211 of the new support column, and the flexible connector 3 can be telescopically slid in the vertical direction; the rigid connector 4 is welded to the middle of the old support column 1, and the rigid connector 4 is used to connect the first working surface 111 of the old support column 1 and the third working surface 212 of the new support column 2. In the present invention, the old support column 1 and the new support column 2 are cleverly connected together by the flexible connector 3 and the rigid connector 4, which significantly reduces the load-bearing pressure of the old support column 1 and the old truss structure 6, and improves the service life of the cigarette factory.

[0024] like Figure 3 As shown, it should be understood that the connection direction of the old support column 1 and the new support column 2 is the direction of the secondary force of the actual cigarette factory building, that is, the weak axis direction (i.e. Figure 3 The direction perpendicular to the weak axis in the horizontal plane is the main force direction of the actual cigarette factory building, that is, the strong axis direction (i.e. Figure 3 up and down directions in the image).

[0025] like Figure 3 As shown, the new support column 2 is a square steel column, the old support column 1 is a square concrete column, the first working surface 111 of the old support column 1 and the second working surface 211 of the new support column 2 are parallel to each other, and the second working surface 211 and the third working surface 212 of the new support column 2 are perpendicular to each other.

[0026] like Figure 3 As shown, further, the flexible connector 3 and the rigid connector 4 are both located at the same height position of the first working surface 101 of the old support column 1 , and the rigid connector 4 is located on the side of the flexible connector 3 .

[0027] like Figure 3 As shown, further, the flexible connecting member 3 includes a first connecting plate 10 and a second connecting plate 201, the first connecting plate 101 is fixed on the first working surface 111 of the old support column 1, the second connecting plate 201 is fixed on the second working surface 211 of the new support column 2, and the first connecting plate 10 and the second connecting plate 201 are slidably connected along the vertical direction.

[0028] like Figure 3 As shown, further, a first strip hole 1011 is opened on the first connecting plate 101 in the vertical direction, and a second strip hole 1011 is opened on the second connecting plate 101 in the vertical direction. The first strip hole 1011 and the second strip hole 2011 are connected by bolts.

[0029] like Figure 3 As shown, further, the first connecting plate 101 is a T-shaped steel, and the second connecting plate 101 is an I-shaped steel.

[0030] Installation of the flexible connector 3: Specifically, fix the wing plate of the T-steel (first connecting plate 101) to the first working surface 111 of the square concrete column (old support column 1) by bolts; weld the I-steel (first connecting plate 101) to the second working surface 211 of the square steel column (new support column 2); then use bolts to penetrate the first strip hole 1011 of the I-steel (first connecting plate 101) and the second strip hole 2011 on the web of the T-steel (first connecting plate 101), so as to realize the sliding connection between the I-steel (first connecting plate 101) and the T-steel (first connecting plate 101) in the vertical direction.

[0031] The installation of the rigid connector 4 is specifically done by fixing a steel plate on the first working surface 111 of the square concrete column (old support column 1) by bolts, welding one end of the angle steel (rigid connector 4) to the third working surface 212 of the square steel column (new support column 2), and welding the other end to the steel plate, thereby achieving fixed installation of the angle steel (rigid connector 4) between the square concrete column (old support column 1) and the square steel column (new support column 2).

[0032] Based on the above-mentioned load-unloading structure based on the transformation of a cigarette factory, the present invention also provides a construction method of the load-unloading structure based on the transformation of a cigarette factory, comprising the following steps: a. Dismantle the existing pipelines in the cigarette factory; b. Accurately measure and determine the relative positions of the old support column 1 and the new support column 2, as well as the positions of each other; c. Strengthen the ground, excavate to the base elevation, and pour reinforced concrete foundation; d. Fix and install anchor bolts on the ground next to the old support column 1; e. The new support column 2 is vertically fixed to the anchor bolt next to the old support column 1 by means of an anchor bolt; f. One end of the flexible connector 2 is fixed to the first working surface 111 of the old support column 1, and the other end of the flexible connector 2 is fixed to the second working surface 211 of the new support column 2; g. One end of the rigid connector 4 is fixed to the first working surface 111 of the old support column 1, and the other end of the rigid connector 4 is fixed to the third working surface 212 of the new support column 2; h. Fix the new truss 6 to the top of each new support column 2 in multiple times, and install the original pipelines on the new truss 6.

[0033] Furthermore, in step b, the measurement and control work strictly follows the principle of from the whole to the part, from high level to low level, step by step network layout, and hierarchical control.

[0034] Furthermore, before detailed measurement work, the measurement positioning conditions should be checked in time to ensure high accuracy of construction measurement.

[0035] Furthermore, lifting observation points are arranged at the four corners, columns, and along the outer walls of the cigarette factory. The location, quantity, and buried form of the formal observation points are generally determined by the designers. During construction, monitoring points are arranged according to needs. After the construction reaches the ground structure, the permanent observation points are buried and then moved to the formal points for observation.

[0036] Furthermore, in step c, the ground can be selectively reinforced according to the strength of the ground in actual conditions.

[0037] Furthermore, the anchor bolt used in step e is a chemical anchor bolt.

[0038] It should be understood that during the actual construction process, the production equipment on the ground needs to be moved to a safe location first, and then moved back to the cigarette factory building after the construction is completed.

[0039] It should be understood that before construction, various loads on the top of the cigarette factory (such as the above-mentioned pipelines) were applied to the old support columns 1 and the old trusses 5. Due to the long service time of the cigarette factory and the aging of the materials, the old support columns 1 and the old trusses 5 could no longer bear these loads, so that the cigarette factory was at serious safety risk. After the cigarette factory is renovated according to the present invention, various loads on the top of the cigarette factory (such as the above-mentioned pipelines) can be applied to the new support columns 2 and the new trusses 6.

[0040] It should be understood that the old support column 6 is connected to the new support column 2 via a rigid connector 4 (angle steel), which constrains the horizontal movement of the new support column 2 in the strong axis direction and ensures the stability of the steel structure in the cigarette factory.

[0041] In addition, the old support column 6 is connected to the new support column 2 through the flexible connector 3 (the first connecting plate 101 and the second connecting plate 201 connected in a sliding manner in the vertical direction). When the new support column 2 is subjected to a vertical force, the new support column 2 will deform downward (while sliding relative to the old support column 6 and avoiding applying a vertical force to the old support column 6), ensuring that the load on the new truss 6 is smoothly transferred to the ground through the new support column 2.

[0042] The technical solution of the present invention is described above in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

[0043] In the description of the present invention, it should be understood that the expressions “first” and “second” are used to describe the various elements of the present invention and do not represent any limitation of order, quantity or importance, but are only used to distinguish one component from another.

[0044] It should be noted that when one element is “connected”, “coupled” or “connected” to another element, it may mean that they are directly connected, coupled or connected, but it should be understood that there may be intermediate elements between the two; that is, the positional relationships of direct connection and indirect connection are covered.

[0045] It should be noted that the use of "a" or "an" and similar words does not necessarily indicate a quantitative limitation. "Include" or "comprising" and similar words mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects.

[0046] It should be noted that terms such as "up", "down", "left" and "right" indicating orientation or positional relationship are only used to indicate relative positional relationship. This is for the convenience of describing the present invention and does not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0047] The preferred embodiments for implementing the present invention have been described in detail above, but it should be understood that the role of these embodiments is only to exemplify, and is not intended to limit the scope, applicability or configuration of the present invention in any way. The protection scope of the present invention is defined by the attached claims and their equivalents. A person of ordinary skill in the art can make many changes to the above embodiments under the guidance of the present invention, and these changes all fall within the protection scope of the present invention.

Claims

1. A load unloading structure based on the transformation of a cigarette factory, characterized in that: include: New support columns, wherein a plurality of new support columns are arranged at intervals beside each of the old support columns, and each of the new support columns is fixed on the ground of the cigarette factory; New trusses, which are fixed and laid on top of each new support column; A flexible connector, which is arranged in the middle of the old support column, and is used to connect the first working surface of the old support column and the second working surface of the new support column, and the flexible connector can be telescopically slidable in the vertical direction; And a rigid connector, which is arranged in the middle of the old support column, and the rigid connector is used to connect the first working surface of the old support column and the third working surface of the new support column.

2. The load unloading structure based on cigarette factory transformation according to claim 1 is characterized in that: The new support column is a square steel column, the old support column is a square concrete column, the first working surface of the old support column and the second working surface of the new support column are parallel to each other, and the second working surface and the third working surface of the new support column are perpendicular to each other.

3. The load unloading structure based on cigarette factory transformation according to claim 2 is characterized in that: The flexible connector and the rigid connector are both located at the same height position of the first working surface of the old support column, and the rigid connector is located on the side of the flexible connector.

4. The load unloading structure based on cigarette factory transformation according to claim 2 is characterized in that: The flexible connector includes a first connecting plate and a second connecting plate, wherein the first connecting plate is fixed on the first working surface of the old support column, and the second connecting plate is fixed on the second working surface of the new support column, and the first connecting plate and the second connecting plate are slidably connected along the vertical direction.

5. The load unloading structure based on cigarette factory transformation according to claim 4 is characterized in that: The first connecting plate is provided with a first strip hole in the vertical direction, and the second connecting plate is provided with a second strip hole in the vertical direction. The first strip hole and the second strip hole are connected by bolts.

6. The load unloading structure based on cigarette factory transformation according to claim 4 or 5, characterized in that: The first connecting plate is a T-shaped steel, and the second connecting plate is an I-shaped steel.

7. The load unloading structure based on cigarette factory transformation according to claim 2 is characterized in that: The rigid connecting piece is an angle steel, one end of which is fixed on the first working surface of the old support column, and the other end of which is fixed on the third working surface of the new support column.

8. The load unloading structure based on cigarette factory transformation according to claim 1 is characterized in that: The new truss is a multi-section structure.

9. A construction method, characterized in that: Used in the construction process of a load-unloading structure based on the transformation of a cigarette factory as described in any one of claims 1 to 8, characterized in that it includes the following steps: a. Dismantle the existing pipelines in the cigarette factory; b. Accurately measure and determine the relative positions of the old and new support columns, as well as the positions of other details; c. Strengthen the ground, excavate to the base elevation, and pour reinforced concrete foundation; d. Fixing an anchor bolt on the ground next to the old support column; e. The new support column is vertically fixed to the anchor bolt next to the old support column by an anchor bolt; f. The one end of the flexible connector is fixed to the first working surface of the old support column, and the other end of the flexible connector is fixed to the second working surface of the new support column; g. One end of the rigid connector is fixed to the first working surface of the old support column, and the other end of the rigid connector is fixed to the third working surface of the new support column; h. Fix the new trusses to the top of each new support column in multiple times, and install the original pipelines to the new trusses.

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