A reconstruction method for preserving the appearance of a masonry belt corridor in an industrial heritage site and changing its use

Abstract

The invention relates to the technical field of construction measures for existing buildings, and discloses a reconstruction method for retaining the appearance of a masonry belt corridor of an industrial heritage site and changing its use. In the invention, by arranging additional double hidden columns in the side wall, the side wall is transformed into a structure hinged together at multiple ends, and then a one-way sliding hinge support with a sliding direction perpendicular to the belt corridor is arranged at the end of the belt corridor. The two points are combined to allow the belt corridor to swing, thereby greatly reducing the deformation caused by pre-arching and unloading, the uneven and constantly changing dynamic loads applied by people after the reconstruction is completed, and the influence of the wind load on the side wall caused by the larger span of the supporting beam and column pulling. Then, the side wall segment is wrapped with the additional double hidden columns and the board wall to ensure that the side wall segment does not crack during the swinging process; at the same time, the concrete of the board wall increases the original surface roughness, which is convenient for pasting a decorative layer to renovate the original worn surface of the belt corridor side wall.

Description

Technical Field

[0001] The invention relates to the technical field of construction measures for existing buildings, and in particular to a reconstruction method for retaining the appearance of a masonry belt corridor of an industrial heritage site and changing its use. Background Art

[0002] The fate of most old buildings is to be demolished to make way for the construction of new buildings, but there are some old buildings with special significance that need to be changed in use while retaining their original appearance, which requires in-depth renovation of the buildings.

[0003] Considering that the old building itself has been seriously aged, its structural strength has seriously declined, and its appearance is very shabby. These problems are difficult to solve without deep transformation of the building itself. Therefore, the transformation of old buildings often needs to be carried out by dismantling them into parts and reassembling them. During the dismantling process, the building parts can be tested separately and the parts that do not meet the strength standards or are seriously damaged can be replaced. The internal reinforcement treatment or the internal layout of the building can be changed to adapt to the changes in the use of the building. A typical case is a city tower in Beijing, which was transformed in this way after the founding of the People's Republic of China. It was transformed from its original old and shaky appearance to its current appearance that can stably carry a large number of people and equipment.

[0004] However, this type of renovation is not applicable to the masonry structure belt corridors that are common in industrial heritage sites (belt corridors are suspended corridors used to install conveyor belts). First, although the masonry side walls in the belt corridors mainly serve as enclosures and are not load-bearing, they are built with high-strength mortar to resist the vibration of the conveyor belts during the transportation of goods, making them difficult to dismantle without destroying them. Secondly, the structural characteristics of the belt corridors are not compatible with functions such as viewing. When viewing the scenery, people above will apply uneven and constantly changing dynamic loads to the belt corridors, which will cause cracks in the side walls (the side walls here are not located on a stable foundation like on the ground), and the support columns at the bottom of the belt corridors will hinder traffic.

[0005] Taking the Jinyu Xingfa Science Park project in the northern area of ​​Beijing Huairou Science City as an example, the project site is Xingfa Cement Factory, which was built in the early 1990s and contributed a large amount of building materials to Beijing's urban construction. It is an important industrial heritage site. The belt corridor is used to transport cement to the silo for storage. The Great Wall can be seen on the north side of the belt corridor, and the southern area of ​​the science park is on the south side. At the same time, the Yanqi Lake Scenic Area is also within its field of vision, which is very suitable for transformation into a viewing corridor. Therefore, it needs to be transformed into a viewing corridor for use by nearby universities and research institutes while retaining its appearance. Due to its high position (basically not subject to ground damage including collision and theft), and the materials used have good weather resistance, the main structure strength is better when the transformation is carried out. In the construction plan formulated in the early stage (see CN114482592A-Belt Corridor Support Beam and Column Reconstruction Method for Belt Corridor), it is planned to transform the support columns that hinder traffic with support beams and columns, and the rest of the parts are cleaned and repaired. However, in actual construction, it was found that there was a problem of cracking of brick walls during construction. After in-depth calculations, it was found that the pre-arching (during this process, the belt corridor will arch upward), unloading (during this process, the belt corridor will deflect) during the renovation process, and the dynamic load applied by people after the renovation (people will apply uneven and changing dynamic loads to the belt corridor) may cause damage to the brick wall. Even the wind load that was previously considered to have little effect and could not be considered (the belt corridor will sway from side to side during this process) caused a 55 mm deformation after the renovation (the maximum single span of the belt corridor became larger after the support beams and columns were removed), which is also a threat to the brick wall. Moreover, unlike brick walls on the ground, brick walls in the air are more risky if they crack. Summary of the invention

[0006] The invention provides a reconstruction method for retaining the appearance of a masonry belt corridor of an industrial heritage site and changing its use.

[0007] The technical problems to be solved are: the deformation caused by pre-arching and unloading during the transformation of the masonry belt corridor into a viewing corridor, and the uneven and constantly changing dynamic loads applied by people after the transformation are completed will cause damage to the brick walls; and because the maximum single span becomes larger after the support beams and columns are pulled out, the originally harmless wind load will also cause damage to the brick walls.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solution: a reconstruction method for retaining the appearance of the masonry belt corridor of the industrial heritage site and changing its use, which is used to convert the belt corridor into a viewing corridor, the belt corridor includes a bottom beam and a side wall of a masonry structure, and the reconstruction method includes the following steps:

[0009] Step 1: Select a section below one end of the belt corridor with a width and height sufficient to accommodate vehicle traffic, which is recorded as the traffic section. The original support column below the part other than the end of the traffic section is recorded as the interference traffic column; of the two ends of the traffic section, the end mounted on the end support structure of the belt corridor is recorded as the sliding end, and the other end is recorded as the newly added column end;

[0010] Step 2: Install a new support column below the new column end, install a new bottom steel beam between the new support column and the sliding end, disconnect the bottom beam plate from the end support structure, the new bottom steel beam is supported at the bottom of the bottom beam plate, one end is slidably set on the end support structure, and the sliding direction is perpendicular to the new bottom steel beam;

[0011] Step 3: Clean the side wall surface and then reinforce it to prevent bricks from falling off;

[0012] Step 4: Open a groove in the side wall and install a new double hidden column. The new double hidden columns are hidden columns arranged in pairs in the side wall and fixedly connected to the walls on both sides of the groove, and are arranged at intervals along the side wall; the two columns in each pair of hidden columns are hingedly connected to each other without play;

[0013] Step 5: Unload and transfer the load of the interfering traffic column to the newly added bottom steel beam, and then remove the interfering traffic column;

[0014] Step 6: Decorate the side walls and cover the newly added double concealed columns with decorative materials that are consistent with the appearance of the original wall in its new state.

[0015] Furthermore, the two columns in each pair of newly added double concealed columns are arranged along the extension direction of the side wall, and the two columns are hingedly connected to bolts vertically inserted in the ear plates through ear plates, and the ear plates are arranged at intervals on the newly added double concealed columns along the vertical direction and are fixedly connected to the newly added double concealed columns;

[0016] The newly added double concealed columns in the side walls on both sides of the belt corridor correspond and are aligned one by one.

[0017] Furthermore, the newly added double concealed columns are square steel columns covered with concrete, and the wall surface of the side wall is red brick surface;

[0018] The reinforcement method in step three is to hang steel mesh on the inner and outer wall surfaces of the side wall;

[0019] Step 4: During the slotting process, the steel mesh is disconnected at the slotting position, and the broken ends are respectively welded to the two columns of the newly added double concealed columns;

[0020] In step six, concrete is sprayed on the wall surface of the side wall to cover the wall surface and the square steel column to form a board wall close to the side wall. The board wall is disconnected at the position between the newly added double hidden columns to avoid affecting the hinge. After the concrete solidifies, PK bricks are pasted on the inner side of the side wall and imitation brick paint is sprayed on the outer side of the side wall.

[0021] Furthermore, an observation window is provided on the side wall, and a steel square frame is provided in the window hole to support the window hole, the steel mesh is disconnected at the window hole position, and the broken end is welded to the steel square frame.

[0022] Furthermore, in step three, before reinforcement, the side wall is first inspected, and if there are defects including cracks and looseness, the defective positions are reinforced by drilling holes and grouting.

[0023] Furthermore, the newly added bottom supporting steel beam includes two main beams parallel to the belt corridor and multiple secondary beams arranged between the main beams and fixedly connected to the main beams. The ends of the main beams are provided with one-way sliding hinge supports, and the one-way sliding hinge supports are anchored on the newly added reinforced concrete beams on the end support structure, and the sliding direction is perpendicular to the main beams; the newly added reinforced concrete beams are arranged perpendicular to the main beams.

[0024] Further, step five includes the following sub-steps:

[0025] Step 5.1: Install a temporary support platform on the side of the interfering traffic column;

[0026] Step 5.2: Install a jack on the temporary support platform to push up the newly added bottom steel beam, so that the newly added bottom steel beam is pre-arched;

[0027] Step 5.3: Remove the part of the interfering traffic column that is higher than the temporary support platform;

[0028] Step 5.4: The jack is retracted to transfer the load of the interfering traffic column to the newly added bottom steel beam;

[0029] Step 5.5: Remove the jack and dismantle the entire interfering traffic column.

[0030] Furthermore, in step 5, the deformation of the newly added bottom steel beam is visually monitored in the following manner:

[0031] Draw a marking line on the side of the newly added bottom steel beam, the marking line is parallel to the full length line of the newly added bottom steel beam; then install and tighten a reference rope between the newly added support column and the end support structure before pre-arching, the reference rope is set close to the marking line and has no connection with the newly added bottom steel beam;

[0032] During the pre-arching and jack retraction process, the deformation of the newly added bottom steel beam is monitored by means of the relative position change between the marking line and the reference rope.

[0033] Furthermore, the belt corridor has a slope, and the traffic section is arranged at the higher end of the belt corridor.

[0034] Compared with the prior art, the reconstruction method of the present invention for retaining the appearance of the industrial heritage masonry belt corridor and changing its use has the following beneficial effects:

[0035] In the present invention, by arranging additional double concealed columns in the side wall, the side wall is transformed into a structure hinged at multiple ends, and then a one-way sliding hinge support with a sliding direction perpendicular to the belt corridor is arranged at the end of the belt corridor. The two points are combined to allow the belt corridor to swing, thereby greatly reducing the deformation caused by pre-arching and unloading, the uneven and constantly changing dynamic loads applied by people after the transformation is completed, and the influence of the wind load on the side wall caused by the increase in the span of the supporting beam and column pulling is increased; the side wall segments are then wrapped with the additional double concealed columns and board walls to ensure that the side wall segments do not crack during the swinging process; at the same time, the concrete of the board wall increases the original surface roughness, making it convenient to paste the decorative layer to renovate the original worn surface of the belt corridor side wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a main view of a building to which a reconstruction method of the present invention for retaining the appearance of a masonry belt corridor of an industrial heritage site and changing its use is applied, and the figure includes the interfering traffic columns that have been removed after the construction;

[0037] Figure 2 A top view of a building to which a reconstruction method of the present invention for retaining the appearance of a masonry belt corridor of an industrial heritage site and changing its use is applied;

[0038] Figure 3 This is a schematic diagram of the connection method of the newly added double concealed columns. For the convenience of observation, the thickness of the decorative material in the figure is larger than the actual situation.

[0039] In the figure, 1-side wall, 11-new double concealed column, 2-interfering traffic column, 3-new supporting column, 4-new bottom steel beam, 5-end supporting structure, 6-one-way sliding hinge support, 7-steel mesh, 8-decorative material DETAILED DESCRIPTION

[0040] Take the belt corridor in the Jinyuxingfa Science Park project in the northern area of ​​Huairou Science City, Beijing, as an example. Figure 1-3 As shown, a reconstruction method for retaining the appearance of a masonry belt corridor of an industrial heritage site and changing its use is used to convert the belt corridor into a viewing corridor. The belt corridor includes a bottom beam and a side wall 1 of a masonry structure. The reconstruction method includes the following steps:

[0041] Step 1: A section with a width and height sufficient to accommodate vehicle traffic is selected below one end of the belt corridor, which is recorded as the traffic section. The original support column below the part other than the end of the traffic section is recorded as the interference traffic column 2; of the two ends of the traffic section, one end mounted on the end support structure 5 of the belt corridor is recorded as the sliding end, and the other end is recorded as the newly added column end;

[0042] The original location of the belt corridor was not considered open to traffic. The belt corridor itself is a very efficient transfer structure, so the setting of the columns below it often hinders traffic. After the renovation, it is no longer used as a belt corridor, and the problem of interfering with traffic must be solved. The solution here is to use the method of supporting beams and pulling out columns, that is, adding some steel beams to carry the load originally carried by the supporting columns that interfere with traffic. In addition, the parts of the original beam-column structure that need to be retained also need to be repaired and the cross-section expanded, because the original structure is no longer reliable after years of use.

[0043] Step 2: Install a new support column 3 below the new column end, install a new bottom steel beam 4 between the new support column 3 and the sliding end, disconnect the connection between the bottom beam plate and the end support structure 5, and support the new bottom steel beam 4 at the bottom of the bottom beam plate, with one end slidingly set on the end support structure 5, and the sliding direction is perpendicular to the new bottom steel beam 4;

[0044] The disconnection here refers to preventing the connection between the bottom beam and the end support structure 5 from affecting the sliding of the belt corridor end. If the bottom beam is not connected to the end support structure 5 but is erected on it, the disconnection operation does not need to be performed. The reason for adding a bottom steel beam 4 instead of simply expanding the size of the original bottom beam is, firstly, because the strength of the original bottom beam is no longer known, and it is impossible to know how large it should be to withstand the additional load after the support beam is pulled out; secondly, because the original bottom beam is a reinforced concrete structure, it is not suitable for replacement and unloading operations. The newly added bottom steel beam 4 after the modification of this embodiment can bear the force independently in the absence of a bottom beam in the same position.

[0045] Step 3: Clean the surface of the side wall 1 and then reinforce it to prevent the bricks from falling off;

[0046] The surface of the original side wall 1 has been very dirty after being abandoned for a long time, which will have an adverse effect on various reinforcement and decoration methods.

[0047] Step 4: A groove is opened in the side wall 1 to install a new double hidden column 11. The new double hidden columns 11 are hidden columns arranged in pairs in the side wall 1 and fixedly connected to the walls on both sides of the groove, and are arranged at intervals along the side wall 1; the two columns in each pair of hidden columns are hingedly connected to each other without play;

[0048] The modification process here, combined with the sliding modification of the end, allows the entire belt corridor to swing like a nine-section whip. However, there must be no play at the hinged position, which means that it can rotate but cannot move horizontally. Normally, the pin shaft at the hinge position is clearance-matched with the pin hole. These gaps are play, which allows translation. If translation occurs here, the sliding between the side walls 1 will cause a strong impact on the hinge, which will not only damage the hinge quickly, but also cause the side wall 1 to crack due to the impact.

[0049] Note that if two of the newly added double concealed columns 11 need to be connected to the bottom, they can be connected to the newly added bottom steel beam 4 through a connecting rod at the traffic section, and connected to the bottom beam plate at the remaining positions. Because there is a large swing at the traffic section, connecting with the bottom beam plate will affect the swing.

[0050] Step 5: Unload and transfer the load of the interfering traffic column 2 to the newly added bottom supporting steel beam 4, and then remove the interfering traffic column 2;

[0051] Unloading of steel structures is a relatively mature operation and will not be described in detail here.

[0052] Step 6: Renovate the side wall 1 and cover the newly added double hidden columns 11 with decorative materials 8 that are consistent with the original wall surface in a brand new state, so as to protect the hinged structure and renovate the originally damaged surface of the side wall 1.

[0053] The two columns in each pair of newly added double concealed columns 11 are arranged along the extension direction of the side wall 1, and the two columns are hingedly connected to the bolts vertically inserted in the ear plates through the ear plates, and the ear plates are arranged at intervals on the newly added double concealed columns 11 along the vertical direction and are fixedly connected to the newly added double concealed columns 11;

[0054] Bolts are used here instead of pins to avoid the occurrence of play.

[0055] The newly added double hidden columns 11 in the side walls 1 on both sides of the belt corridor correspond to each other and are aligned. That is to say, the corresponding two pairs of newly added double hidden columns 11 are located on the same cross section of the belt corridor to ensure that both sides are synchronized during the swinging process.

[0056] In this embodiment, the newly added double concealed columns 11 are square steel columns wrapped with concrete to facilitate welding;

[0057] The reinforcement method in step three is to hang a steel mesh 7 on the inner and outer wall surfaces of the side wall 1; before hanging the mesh, it is advisable to roughen it to facilitate subsequent concrete spraying. At the same time, some protrusions should be pre-welded on the sides of the newly added double concealed columns 11 to strengthen the connection with the sprayed concrete and facilitate welding with the steel mesh 7.

[0058] During the slotting process in step four, the steel mesh 7 is disconnected at the slotting position, and the broken ends are welded and connected to the two columns of the newly added double hidden columns 11; that is to say, the steel mesh 7 here is different from the conventional mesh hanging method, and its ends are also welded and tightened, forming a cage with the newly added double hidden columns 11 to wrap the bricks inside.

[0059] In step six, concrete is sprayed on the wall surface of the side wall 1 to cover the wall surface and the square steel columns to form a board wall close to the side wall 1. The board wall is disconnected at the position between the newly added double hidden columns 11 to avoid affecting the hinge; then, PK bricks are pasted on the inner side of the side wall 1 (that is, inside the belt corridor) before the concrete solidifies, and imitation brick paint is sprayed on the outer side of the side wall 1 (that is, outside the belt corridor) after the concrete solidifies.

[0060] The wall surface of the side wall 1 in this embodiment is a red brick surface, which is formed into a clear brick wall surface by grouting. PK bricks are a kind of ceramic tile that can create a surface texture similar to that of a clear brick wall, and can restore the original clear brick wall look and feel of the belt corridor side wall 1. Note that the PK bricks pasted between the newly added double hidden columns 11 should be replaced with flexible decorative panels of the same color to avoid the PK bricks being damaged during the swing of the belt corridor. If PK bricks are needed at this position, they can be installed on the newly added double hidden columns 11 by dry hanging without connecting them to the board wall, and some gaps are reserved inside for the swing of the belt corridor. However, it is dangerous to paste tiles on the high-altitude exterior walls because the tiles may also fall off. Therefore, the outer side of the side wall 1 is replaced with imitation brick paint. Its appearance is similar to a brick wall, but the feel is different. However, the outer side of the side wall 1 will not come into direct contact with tourists.

[0061] In addition, shotcrete solidifies quickly, and laying PK bricks requires a series of preparations such as laying out lines. Usually, it is too late to complete the preparations for laying out PK bricks before the shotcrete solidifies, so it is necessary to lay out PK bricks with tile mortar or tile adhesive after the concrete solidifies. Of course, if multiple laser levelers are used for laying out lines, it may be possible to complete the preparations for laying out PK bricks before the shotcrete solidifies, and directly lay PK bricks on the shotcrete. Sites with conditions can try this.

[0062] When the sprayed concrete is scraped, it is advisable to use a rough trowel to create a rough surface. If the bottom of the sprayed concrete on the outside of the side wall 1 is suspended, it is advisable to install steel edge strips on the outer edge of the bottom beam slab in advance by welding or planting reinforcement.

[0063] An observation window is provided on the side wall 1, and a steel square frame is provided in the window hole to support the window hole. The steel mesh 7 is disconnected at the window hole position, and the broken end is welded to the steel square frame.

[0064] If there is no window hole here, you can make a hole while making the groove in step 4, hang a complete steel mesh 7 when hanging the mesh, and dig out the corresponding position on the steel mesh 7 and weld it when making the groove and hole.

[0065] Step 3 Before reinforcement, the side wall 1 is inspected first. If there are defects including cracks and looseness, the defective positions are reinforced by drilling holes and grouting to further improve the strength of the side wall 1.

[0066] In this embodiment, the newly added bottom supporting steel beam 4 includes two main beams parallel to the belt corridor and multiple secondary beams arranged between the main beams and fixedly connected to the main beams. A one-way sliding hinge support is arranged at the end of the main beam. The one-way sliding hinge support is anchored on the newly added reinforced concrete beam on the end support structure 5, and the sliding direction is perpendicular to the main beam; the newly added reinforced concrete beam is arranged perpendicular to the main beam.

[0067] Step 5 includes the following sub-steps:

[0068] Step 5.1: Install a temporary support platform on the side of the interfering traffic column 2;

[0069] Step 5.2: Install a jack on the temporary support platform to push up the newly added bottom supporting steel beam 4, so that the newly added bottom supporting steel beam 4 is pre-arched;

[0070] Step 5.3: Remove the part of the interfering traffic column 2 that is higher than the temporary supporting platform;

[0071] Step 5.4: The jack is retracted to transfer the load of the interfering traffic column 2 to the newly added bottom supporting steel beam 4;

[0072] Step 5.5: Remove the jack and dismantle the entire interfering traffic column 2.

[0073] For more detailed beam-supporting and column-pulling processes and corresponding structures, such as foundation reinforcement, please refer to the early technical solution of the present invention: CN114482592A - Belt Corridor Beam-Pillar-Pulling Reconstruction Construction Method.

[0074] In step 5, the deformation of the newly added bottom steel beam 4 is visually monitored in the following manner:

[0075] Draw a marking line on the side of the newly added bottom steel beam 4, the marking line is parallel to the full length line of the newly added bottom steel beam 4; then install and tighten a reference rope between the newly added support column 3 and the end support structure 5 before pre-arching, the reference rope is set close to the marking line and has no connection with the newly added bottom steel beam 4;

[0076] During the pre-arching and jack contraction process, the deformation of the newly added bottom supporting steel beam 4 is monitored by means of the relative position change between the marking line and the reference rope.

[0077] Excessive deformation during construction will lead to a series of problems. There is a set of special instruments to monitor deformation, but those instruments are not intuitive enough and cannot monitor all positions on the entire steel beam. Therefore, another set of auxiliary monitoring structures is set up here, which allows construction workers on both sides of the scaffolding to directly see the deformation of the steel beam, which is convenient for risk control and makes construction more accurate.

[0078] The belt corridor has a slope, and the traffic segment is set at the higher end of the belt corridor. The higher end of the belt corridor is less likely to cause height restrictions on the vehicles below.

[0079] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A reconstruction method for preserving the appearance of a masonry belt corridor of an industrial heritage site and changing its use, for converting the belt corridor into a viewing corridor, the belt corridor comprising a bottom beam and a masonry structure side wall (1), characterized in that: The reconstruction method comprises the following steps: Step 1: Select a section below one end of the belt corridor with a width and height sufficient to accommodate vehicle traffic, which is recorded as the traffic section. The original support column below the part other than the end of the traffic section is recorded as the interference traffic column (2); of the two ends of the traffic section, one end mounted on the end support structure (5) of the belt corridor is recorded as the sliding end, and the other end is recorded as the newly added column end; Step 2: Install a new support column (3) below the new column end, install a new bottom steel beam (4) between the new support column (3) and the sliding end, disconnect the bottom beam plate from the end support structure (5), and the new bottom steel beam (4) is supported on the bottom of the bottom beam plate, one end of which is slidably arranged on the end support structure (5), and the sliding direction is perpendicular to the new bottom steel beam (4); Step 3: Clean the surface of the side wall (1) and then reinforce it to prevent the bricks from falling off; Step 4: A groove is opened in the side wall (1) to install a new double hidden column (11), wherein the new double hidden columns (11) are arranged in pairs in the side wall (1) and are respectively fixedly connected to the wall bodies on both sides of the groove, and are arranged at intervals along the side wall (1); the two columns in each pair of hidden columns are hingedly connected to each other without play; Step 5: Unloading, transferring the load of the interfering traffic column (2) to the newly added bottom supporting steel beam (4), and then removing the interfering traffic column (2); Step 6: Decorate the side wall (1) and cover the newly added double concealed columns (11) with decorative materials (8) that are consistent with the original wall in a brand new state.

2. The reconstruction method of the industrial heritage masonry belt corridor that retains its appearance and changes its use according to claim 1 is characterized by: The two columns in each pair of newly added double concealed columns (11) are arranged along the extension direction of the side wall (1) where they are located, and the two columns are hingedly connected to bolts vertically inserted in the ear plates through ear plates, and the ear plates are arranged at intervals on the newly added double concealed columns (11) along the vertical direction and are fixedly connected to the newly added double concealed columns (11); The newly added double concealed columns (11) in the side walls (1) on both sides of the belt corridor correspond to each other and are aligned.

3. The reconstruction method of retaining the appearance of the masonry belt corridor of an industrial heritage site and changing its use according to claim 1 is characterized by: The newly added double concealed columns (11) are square steel columns covered with concrete, and the wall surface of the side wall (1) is a red brick surface; The reinforcement method in step 3 is to hang a steel mesh (7) on the inner and outer side walls (1) of the side wall (1); Step 4: During the slotting process, the steel mesh (7) is disconnected at the slotting position, and the broken ends are respectively welded to two columns in the newly added double concealed columns (11); In step 6, concrete is sprayed on the wall surface of the side wall (1) to cover the wall surface and the square steel column, so as to form a board wall close to the side wall (1), and the board wall is disconnected at the position between the newly added double hidden columns (11) to avoid affecting the hinge; after the concrete solidifies, PK bricks are pasted on the inner side of the side wall (1) and imitation brick paint is sprayed on the outer side of the side wall (1).

4. The reconstruction method of retaining the appearance of the masonry belt corridor of an industrial heritage site and changing its use according to claim 3 is characterized by: An observation window is provided on the side wall (1), and a steel square frame is provided in the window hole to support the window hole. The steel mesh (7) is disconnected at the window hole position, and the disconnected end is welded to the steel square frame.

5. The reconstruction method of retaining the appearance of the masonry belt corridor of an industrial heritage site and changing its use according to claim 1 is characterized by: Step 3 Before reinforcement, the side wall (1) is first inspected. If there are defects including cracks and looseness, the defective positions are reinforced by grouting.

6. The reconstruction method of the industrial heritage masonry belt corridor retaining its appearance and changing its use according to claim 1 is characterized by: The newly added bottom supporting steel beam (4) comprises two main beams parallel to the belt corridor and a plurality of secondary beams arranged between the main beams and fixedly connected to the main beams, the ends of the main beams are provided with one-way sliding hinge supports, the one-way sliding hinge supports are anchored on the newly added reinforced concrete beams on the end support structure (5), and the sliding direction is perpendicular to the main beams; the newly added reinforced concrete beams are arranged perpendicular to the main beams.

7. The reconstruction method of retaining the appearance of the masonry belt corridor of an industrial heritage site and changing its use according to claim 1 is characterized by: Step 5 includes the following sub-steps: Step 5.1: Install a temporary support platform on the side of the interfering traffic column (2); Step 5.2: Install a jack on the temporary support platform to push up the newly added bottom supporting steel beam (4) so ​​that the newly added bottom supporting steel beam (4) is pre-arched; Step 5.3: Remove the portion of the interfering traffic column (2) that is higher than the temporary support platform; Step 5.4: The jack is retracted to transfer the load of the interfering traffic column (2) to the newly added bottom supporting steel beam (4); Step 5.5: Remove the jack and dismantle the entire interfering traffic column (2).

8. The reconstruction method of retaining the appearance of the masonry belt corridor of an industrial heritage site and changing its use according to claim 7 is characterized by: In step 5, the deformation of the newly added bottom supporting steel beam (4) is visually monitored in the following manner: A marking line is drawn on the side of the newly added bottom supporting steel beam (4), wherein the marking line is a full-length line parallel to the newly added bottom supporting steel beam (4); and then a reference rope is installed and tightened between the newly added support column (3) and the end support structure (5) before pre-arching, wherein the reference rope is arranged close to the marking line and is not connected to the newly added bottom supporting steel beam (4); During the pre-arching and jack contraction process, the deformation of the newly added bottom supporting steel beam (4) is monitored by means of the relative position change between the marking line and the reference rope.

9. The reconstruction method of retaining the appearance of the masonry belt corridor of an industrial heritage site and changing its use according to claim 1 is characterized by: The belt corridor has a slope, and the traffic section is arranged at the higher end of the belt corridor.

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