A device for pushing an ancient city wall

Abstract

The application relates to a kind of ancient city walls pushing device, including pushing device body, pushing device body is equipped with pushing frame, pushing device, moving system and lifting driving device constitute, moving system outside is equipped with driving motor, driving motor can drive pushing device to move up and down in pushing frame, when moving system moves to the ancient city wall surface to be repaired, pushing device moves to the height of ancient city wall that needs to be repaired, the lifting shovel of pushing device is inserted into the gap in the upper end of the position that needs to be repaired, the pressure of upper wall body on the outer drum part is removed, easy to push, then the outer drum of ancient city wall is pushed inwards and repaired by using the jack transverse pushing mode, the application removes the pressure of upper wall body on the outer drum by lifting system, then the outer drum wall body is repaired by transverse pushing, and the effect of repairing the outer drum city wall is realized by later reinforcement.

Description

Technical Field

[0001] This application relates to the technical field of civil engineering machinery, and in particular to a device for jacking up ancient city walls. Background Technology

[0002] City walls, as a type of military defense structure, played a vital role in ancient times, and most of the existing city walls are still in use today.

[0003] They have all been successively designated as national key cultural relics protection units or provincial cultural relics protection units, possessing extremely high value. However, this

[0004] After hundreds of years, these city walls have shown increasing signs of material deterioration and even structural damage.

[0005] Wall weathering, cracking, and bulging are among the common problems found in city walls, particularly in Cangnan County, Wenzhou City, Zhejiang Province.

[0006] The walls of several national key cultural relics sites, including Puzhuangsuo City in the county and Yongchangbao in Longwan District, have bulged outwards, and no effective solutions have been found to date.

[0007] Repair and maintenance.

[0008] Many factors can influence the bulging of the city wall, such as the growth of plants on the wall and temperature changes. In addition, due to the two sides of the city wall...

[0009] The sides were constructed using piled-up stones, with the center filled with rammed earth. As rainwater seeped into the city wall, the expansion of the earth caused damage.

[0010] The outer edge of the wall bulges.

[0011] If the outward bulging of the city wall is not addressed promptly, it can easily lead to partial collapse of the wall. To address this issue, repairs are currently underway.

[0012] The restoration methods are basically all about demolition and reconstruction, that is, after demolition, rebuilding according to the original shape, raw materials, original process, and original method.

[0013] However, this method is costly to construct and is not suitable for city walls of significant historical importance that require protection, especially...

[0014] If the city wall has a large area of ​​outward bulging, demolishing and rebuilding it would greatly reduce the value of the cultural relic.

[0015] The principle of cultural relic protection and restoration in my country is "not to alter the original state of the cultural relics," which is written in the "Law of the People's Republic of China on the Protection of Cultural Relics."

[0016] According to the "Law on the Protection of Cultural Relics," all cultural relic restoration projects must adhere to this principle, which is also the prevailing principle both internationally and domestically.

[0017] The process should be minimized. Therefore, a new method is needed that can reduce the impact on the restoration process to a minimum.

[0018] The disruption to the city wall allowed it to be restored to its original state, ensuring its safety while also facilitating construction and reducing costs.

[0019] In response to the aforementioned technical problems, the inventors believe there is a need for a jacking device for ancient city walls to address the outward bulging of the city walls.

[0020] The problem has been fixed. Summary of the Invention

[0021] To achieve the above objectives, this application provides a jacking device for ancient city walls, comprising a jacking device body, a jacking frame, a jacking device, a moving system, and a lifting drive device. Drive motors are installed on both outer sides of the moving system. These drive motors can drive the jacking device to move up and down within the jacking frame. When the moving system moves to the surface of the ancient city wall to be repaired, the jacking device moves to the height at which the wall needs to be repaired. The lifting blade of the jacking device is inserted into the gap at the upper end of the bulging position, lifting and maintaining the wall surface at the upper end of the bulging position. Then, a jack is used to jack the bulging wall inwards for repair. This application utilizes a method of vertically lifting the wall above the bulging position to be repaired, followed by jacking the bulging wall laterally to perform initial repair and subsequent consolidation, achieving the effect of repairing the bulging of the ancient city wall.

[0022] This application provides a jacking device for ancient city walls, which adopts the following technical solution:

[0023] A jacking device for an ancient city wall includes a jacking device body, which is composed of a jacking frame, a jacking device, a moving system and a lifting drive device.

[0024] The mobile system is equipped with a drive motor on its outer side, which can drive the jacking device to move up and down within the jacking frame.

[0025] When the mobile system moves to the ancient city wall to be repaired, the jacking device moves to the height at which the ancient city wall needs to be repaired. The lifting shovel of the jacking device is inserted into the gap at the upper end of the bulging position to be repaired. The lifting shovel relieves the pressure of the upper wall on the bulging part and is easy to push. Then, the jack is used to push the bulging of the ancient city wall inward to repair it.

[0026] By adopting the above technical solution, this application has the ability to perform preliminary repair by vertically lifting the city wall above the location to be repaired on the outer bulge of the ancient city wall, and then using jacks to horizontally push the outer bulge of the ancient city wall back, and then consolidate it in the later stage, so as to achieve the effect of repairing the outer bulge of the ancient city wall.

[0027] Optionally, the lower ends of the four frame columns included in the jacking frame are all fixed to the upper surface of the moving system, the upper ends of the frame columns are fixed to the top frame, and the frame columns fixed to the moving system at the bottom and to the top frame at the top form an upright cuboid component containing a cavity.

[0028] By adopting the above technical solutions, the strength is improved from the overall structural design, thus maintaining the rigidity and support strength of the structure.

[0029] Optionally, the lower end of the mobile system is provided with several casters and a bottom jack, with the bottom jack located on the outer side of the casters;

[0030] The casters can stably support the main body consisting of the jacking frame, jacking device, moving system and lifting drive device;

[0031] The bottom jack can stably support the main body consisting of the jacking frame, jacking device, moving system and lifting drive device;

[0032] Both ends of the outer side of the mobile system are provided with front support arms. The lower end of the head of the front support arm is provided with a third jack. The upper support arm of the front support arm is connected to the corresponding frame column by a connecting hinge. The lower arm of the front support arm is movably connected to the outer wall of the mobile system by a movable page. The front support arm can swing circumferentially with the connecting hinge and the movable page.

[0033] The mobile system has rear support arms and lower support blocks at both ends on the other side. The lower end of the head of the lower support block is equipped with a third jack. The upper end of the rear support arm is equipped with a lower support block. The upper end of the frame column at the same position is equipped with an upper support block. The upper end of the support frame is fixed to the upper support block, and the lower end of the support frame is fixed to the lower support block. The support frame forms an oblique support between the top pushing frame and the lower support block.

[0034] By adopting the above technical solution, it is beneficial to raise the hydraulic jack under the trackless universal trolley during actual construction, so that the trolley rollers are lifted off the ground. Since the actual jacking force is large, the support structure of the jacking device is formed as an oblique support between the jacking frame and the bottom support block.

[0035] Optionally, the first lifting frame, the second lifting frame, and the third lifting frame included in the jacking device are installed sequentially from bottom to top in the inner cavity of the upright jacking frame. All four frame columns of the jacking frame are provided with guide rail grooves. The edge ends of the first lifting frame, the second lifting frame, and the third lifting frame are embedded in the corresponding guide rail grooves of the frame columns, so that the first lifting frame, the second lifting frame, and the third lifting frame can all move up and down along the guide rail grooves of the frame columns.

[0036] By adopting the above technical solution, it is beneficial to adjust the corresponding jacking height according to the outward bulging position of the ancient city wall during construction.

[0037] Optionally, a second jack is provided at each of the four right-angle positions on the upper surface of the first lifting frame. The top rod of the second jack, which is fixed to the end face of the first lifting frame at its bottom, faces upward, and the upper end of the top rod of the second jack abuts against the lower surface of the second lifting frame.

[0038] The first lifting frame is equipped with several horizontally pushing jacks, the jacks' rods extend outwards and the rods extend to the same side as the front support arm.

[0039] The upper surface of the second lifting frame is provided with a first jack at each of the four right-angle positions. The top rod of the first jack, which is fixed to the end face of the second lifting frame at the bottom, faces upward, and the upper part of the top rod of the first jack abuts against the lower end face of the third lifting frame.

[0040] The second lifting frame is provided with several horizontally pushing jacks five, the jacks five having their jack rods extending outwards and the jack rods extending in the same direction as the front support arm;

[0041] The center lines of the first jack and the second jack are aligned.

[0042] By adopting the above technical solution, it is beneficial to adjust the corresponding jacking height according to the outward bulging position of the ancient city wall during construction operations, and to adjust the height of the second and third lifting frames according to the outward bulging position of the ancient city wall, so as to adjust the height of the fourth and fifth horizontal jacks.

[0043] Optionally, the third lifting frame is provided with a plurality of outwardly extending lifting blades, and the upper edge of the head of the lifting blades is provided with a bevel.

[0044] The extension direction of the lifting blade is consistent with the extension direction of the jack rods of jacks four and five.

[0045] By adopting the above technical solution, it is easy to insert into the gap at the upper end of the bulging position of the ancient city wall to be repaired, and use the lifting drive device to slightly lift the upper wall or offset the self-weight of the upper wall, which is conducive to the wall pushing repair and reduces external gravity interference.

[0046] Optionally, the lifting drive device includes a drive motor, which is fixed on both sides of the moving system.

[0047] The first lifting frame is provided with movable pulleys on both sides, and the installation direction of the movable pulleys is consistent with the direction of the drive motor.

[0048] The lower ends of both sides of the top frame are provided with stationary pulleys, and the installation direction of the stationary pulleys is consistent with the direction of the drive motor and the movable pulley;

[0049] A fixed ring is provided on one side of the stationary pulley. After one end of the pull rope is connected and fixed to the fixed ring, the other end of the pull rope extends downward and connects with the movable pulley around it before extending upward. The upward-extending pull rope connects with the stationary pulley and extends downward. The downward-extending pull rope is connected to the drive wheel on the rotating shaft of the drive motor.

[0050] The pull rope is wound several times around the drive wheel;

[0051] When the drive motor rotates in the forward direction, the drive wheel rotates and continuously coils the pull rope, pulling it down and retracting it. The pulled rope pulls down and retracts, causing the movable pulley to rise synchronously. The first lifting frame, which is fixed to the movable pulley, is also lifted synchronously. The lifted first lifting frame drives the second and third lifting frames to rise synchronously.

[0052] When the drive motor rotates in the reverse direction, the drive wheel rotates in the reverse direction to continuously release the pull rope coiled on the drive wheel. The released pull rope causes the movable pulley to descend, which in turn causes the first lifting frame to descend. The descending first lifting frame drives the second and third lifting frames to descend synchronously.

[0053] By adopting the above technical solution, the height of the jacking can be adjusted as needed, thus improving its applicability.

[0054] In summary, this application includes at least one of the following beneficial technical effects:

[0055] 1. This application utilizes a method of vertically lifting the city wall above the location to be repaired on the outer bulge of the ancient city wall, followed by horizontally pushing the outer bulge of the ancient city wall back for preliminary repair, and then consolidating it in the later stage, to achieve the effect of repairing the outer bulge of the ancient city wall.

[0056] 2. This application is equipped with a jack for fixed support at the bottom, and the vertical support provides positive stability;

[0057] 3. This application is equipped with casters at the bottom, which facilitates trackless movement;

[0058] 4. The lifting drive device of this application is driven by a drive motor, which makes it easy to adjust several lifting frames to the appropriate height of the outer bulge of the ancient city wall as needed, and the construction is highly flexible;

[0059] 5. In this application, several lifting frames are repaired by using jacks to adjust their respective heights and push them to different height positions on the ancient city wall surface to improve repair efficiency.

[0060] 6. The lifting blade 221 of the third lifting frame 220 of this application can be inserted into the gap at the upper end of the ancient city wall to be repaired, so as to offset and slightly lift the load at the upper end of the gap, which is conducive to pushing the bulging of the wall surface to be repaired. Attached Figure Description

[0061] Figure 1 This is a schematic diagram of an ancient city wall jacking device according to the present invention;

[0062] Figure 2 This is a front view of an ancient city wall jacking device according to the present invention;

[0063] Figure 3 This is a rear view of an ancient city wall jacking device according to the present invention;

[0064] Figure 4 yes Figure 2 The left view;

[0065] Figure 5 yes Figure 2 The right view;

[0066] Figure 6 yes Figure 2 Top view;

[0067] Figure 7 yes Figure 2 A bottom view;

[0068] Figure 8 This is a schematic diagram of an ancient city wall jacking device according to the present invention. Figure 1 ;

[0069] Figure 9 yes Figure 8 Left side view;

[0070] Figure 10 yes Figure 9 Top view of the rear side view.

[0071] Explanation of reference numerals in the attached drawings: 900, jacking device body; 100, jacking frame; 120, top frame; 130, frame column; 200, jacking device; 220, third lifting frame; 221, lifting blade; 222, bevel; 240, second lifting frame; 241, jack five; 260, first lifting frame; 261, jack four; 300, first jack; 310, second jack; 500 510. Moving system; 510. Front support arm; 5101. Connecting hinge; 520. Third jack; 530. Bottom jack; 540. Rear support arm; 550. Lower support block; 5501. Support stop; 560. Support frame; 570. Upper support block; 600. Lifting drive device; 610. Pull rope; 620. Moving pulley; 630. Drive motor; 640. Stationary pulley; 680. Universal wheel. Detailed Implementation

[0072] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0073] This application discloses an ancient city wall jacking device, including a jacking device body 900, which consists of a jacking frame 100, a jacking device 200, a moving system 500, and a lifting drive device 600. A drive motor 630 is provided on the outside of the moving system 500, which can drive the jacking device 200 to move up and down within the jacking frame 100. When the moving system 500 moves to the surface of the ancient city wall to be repaired, the jacking device 200 moves to the height at which the ancient city wall needs to be repaired. The lifting blade 221 of the jacking device 200 is inserted into the gap at the upper end of the bulging position to be repaired. The lifting blade 221 relieves the pressure of the upper wall on the bulging part and makes it easy to jack. Then, the bulging of the ancient city wall is jacked inward by a jack in a horizontal jacking manner to repair it. This application has the function of using the vertical jacking of the city wall above the bulging position to be repaired, and then using a jack in a horizontal jacking manner to perform preliminary repair and subsequent consolidation, so as to achieve the effect of repairing the bulging of the ancient city wall.

[0074] Example 1

[0075] Reference Figure 1 , Figure 2 , Figure 3 As shown, the lower ends of the four frame columns 130 included in the jacking frame 100 are all fixed to the upper end face of the moving system 500, the upper ends of the frame columns 130 are fixed to the top frame 120, and the frame columns 130, which are fixed to the moving system 500 at the bottom and to the top frame 120 at the top, form an upright cuboid component with a cavity inside, constituting a support frame with high overall strength.

[0076] The city wall has many bulges at various points, and their locations are scattered. To reduce the handling of the jacking device during construction, a trackless omnidirectional trolley is installed under the jacking device to facilitate its movement. In application, the trackless omnidirectional trolley can be a standalone device with pre-drilled bolt holes for reliable connection with the jacking device. Alternatively, several omnidirectional wheels 680 and bottom jacks 530 can be installed at the lower end of the moving system 500 of the jacking frame 100. The trackless omnidirectional trolley or the omnidirectional wheels 680 can stably support the main body consisting of the jacking frame 100, the jacking device 200, the moving system 500, and the lifting drive device 600.

[0077] The bottom jack 530 is located outside the caster wheel 680; it can stably support the main body consisting of the jacking frame 100, jacking device 200, moving system 500 and lifting drive device 600 after it is in place;

[0078] To ensure the stability of the jacking device, four support arms are installed, all of which extend outward at an angle to form a large support surface. When the jacking device body 900 is working, its center of gravity is located within the area formed by the four support arms. The lower end of the head of the front support arms 510 at both ends of the outer side of the moving system 500 is equipped with a third jack 520. The upper support arm of the front support arm 510 is connected to the corresponding frame column 130 by a connecting hinge 5101. The lower arm of the front support arm 510 is movably connected to the outer wall of the moving system 500 by a movable hinge. The front support arm 510 can swing circumferentially with the connecting hinge 5101 and the movable hinge, which is beneficial for shortening the straight distance between the lifting blade 221 and the wall to be repaired during jacking construction.

[0079] The mobile system 500 is equipped with rear support arms 540 and lower support blocks 550 at both ends on the other side. The lower end of the head of the lower support block 550 is equipped with a third jack 520. The support frame 560 forms an oblique support between the jacking frame 100 and the lower support block 550, which can effectively support and offset the reverse force generated during the jacking construction of the outer drum.

[0080] Example 2

[0081] like Figures 2-5 As shown, the jacking device 200 includes a first lifting frame 260, a second lifting frame 240, and a third lifting frame 220, which are installed sequentially from bottom to top in the inner cavity of the upright jacking frame 100. The four frame columns 130 of the jacking frame 100 are all provided with guide rail grooves. The edges of the first lifting frame 260, the second lifting frame 240, and the third lifting frame 220 are all embedded in the corresponding guide rail grooves of the frame columns 130, so that the first lifting frame 260, the second lifting frame 240, and the third lifting frame 220 can all move up and down along the guide rail grooves of the frame columns 130. The height of the first lifting frame 260 and the second lifting frame 240 can be adjusted according to the height of the outer bulge of the city wall to be repaired, which greatly improves the convenience and applicability during construction.

[0082] At each of the four right-angle positions on the upper surface of the first lifting frame 260, a second jack 310 is installed. The top rod of the second jack 310, which is fixed to the end face of the first lifting frame 260 at its bottom, faces upward, and the upper end of the top rod of the second jack 310 abuts against the lower surface of the second lifting frame 240. The first lifting frame 260 is equipped with several horizontally pushing jacks 261, which are usually set in two symmetrical pieces on the left and right. The top rods of the two jacks 261 extend outward, and the direction of the extension of the top rod is the same as that of the front support arm 510. After the top rod of the jack 261 abuts against the bulging of the ancient city wall, it slowly extends, which can push the bulging of the wall surface inward to reset and repair it. The second jacks 310 can effectively adjust the distance between the first lifting frame 260 and the second lifting frame 240, and support and disperse the downward gravity of the second lifting frame 240.

[0083] A first jack 300 is installed at each of the four right-angle positions on the upper surface of the second lifting frame 240. The top rod of the first jack 300, which is fixed to the end face of the second lifting frame 240 at its bottom, faces upward, and the upper part of the top rod of the first jack 300 abuts against the lower surface of the third lifting frame 220. The first jack 300 can effectively adjust the distance between the third lifting frame 220 and the second lifting frame 240, and support and disperse the downward gravity of the third lifting frame 220.

[0084] The second lifting frame 240 is equipped with several horizontally pushing jacks 241. The jack rods of the jacks 241 extend outward. The jack rods of the jacks 241 extend towards the same side as the front support arm 510 and push against the bulging wall surface of the ancient city wall. After slowly extending, they can push the bulging wall surface inward to reset and repair it.

[0085] The third lifting frame 220 is equipped with several outwardly extending lifting blades 221. In application, the lifting blades 221 include, but are not limited to, fixed, limited-position pull-out, and hydraulically extended types. The upper edge of the head of each lifting blade 221 has a bevel 222 for easier insertion into the gap in the city wall at the upper end of the outer bulge to be repaired. The extension direction of the lifting blades 221 is consistent with the extension direction of the jacks 261 (fourth jack) and 241 (fifth jack). During construction, before the moving jacking device body 900 reaches the ancient city wall, the bevel 222 of the lifting blades 221 is aligned with the gap in the city wall and inserted into the gap. Then, the lifting drive device 600 is driven, and the drive motor is activated. The 630 lifting rope 610 pulls the first lifting frame 260 upwards. Simultaneously, the second jack 310, the second lifting frame 240, and the first jack 300 lift the third lifting frame 220 upwards. The lifting blade 221 fixed on the third lifting frame 220 simultaneously lifts the upper part of the city wall above the gap in the ancient city wall to be repaired slightly upwards. This effectively counteracts the downward gravity of the upper part of the city wall above the gap and buffers the pressure and load on the lower part of the city wall to be repaired. This releases the load-bearing stress of the city wall to be repaired, which is conducive to the jacking and repair of the bulging wall surface in subsequent construction and eliminates external load-bearing and stress interference.

[0086] Example 3

[0087] like Figure 1 , Figures 4-6 As shown, the lifting drive device 600 includes a drive motor 630, which is fixed on both sides of the moving system 500. The two drive motors 630 start or stop synchronously. Movable pulleys 620 are provided on both sides of the first lifting frame 260, and stationary pulleys 640 are provided at the lower ends of both sides of the top frame 120. The installation direction of the movable pulleys 620 and the stationary pulleys 640 is consistent with the direction of the drive motors 630.

[0088] When connecting the various transmission links of the drive chain of the lifting drive device 600, the lower ends of both sides of the top frame 120 are provided with fixed rings on one side of the stationary pulley 640. After one end of the pull rope 610 is connected and fixed to the fixed ring, the other end of the pull rope 610 extends downward and connects with the movable pulley 620 around it before extending upward. The upward-extending pull rope 610 connects with the stationary pulley 640 and extends downward. The downward-extending pull rope 610 is connected to the drive wheel on the rotating shaft of the drive motor 630. The pull rope 610 is coiled several times on the drive wheel, forming a complete drive chain for lifting the first lifting frame 260 from the drive motor 630. When the drive motor 630 rotates in the forward direction, the rotation of the drive wheel keeps the pull rope 610 coiled and pulling. When rope 610 is pulled down and retracted, the pull rope 610 simultaneously causes the movable pulley 620 to rise, and the first lifting frame 260, which is fixed to the movable pulley 620, to rise simultaneously. The rising first lifting frame 260 drives the second lifting frame 240 and the third lifting frame 220 to rise simultaneously. When the drive motor 630 rotates in the opposite direction, the drive wheel rotates in the opposite direction to continuously release the pull rope 610 coiled on the drive wheel. The released pull rope 610 causes the movable pulley 620 to fall, and simultaneously causes the first lifting frame 260 to fall. The falling first lifting frame 260 drives the second lifting frame 240 and the third lifting frame 220 to fall simultaneously, thereby realizing the adjustment and corresponding position of the different heights of the bulging positions of the ancient city wall to be repaired.

[0089] Example 4

[0090] like Figures 8-10 As shown, for the repair of minor bulging of the ancient city wall, a small jacking device body 900 can be used. The lower support block 550 of the small jacking device body 900 uses a shorter support block 5501 to form a triangular support, which can satisfy the offset of the reaction force during the jacking construction.

[0091] Example 5

[0092] In specific implementation, the drive motor 630 can also be a single unit. The drive wheel of a single drive motor 630 is connected to one end of the two pull ropes 610. When the drive motor 630 rotates in the forward direction, the drive wheel of the drive motor 630 continuously coils the two pull ropes 610, pulling them down and gathering them. The pulled ropes 610 simultaneously cause the movable pulley 620 to rise, and the first lifting frame 260 fixed to the movable pulley 620 is simultaneously lifted. The lifted first lifting frame 260 drives the second lifting frame 240 and the third lifting frame 220 to rise simultaneously. When the drive motor 630 rotates in the reverse direction, the drive wheel rotates in the reverse direction to continuously release the pull ropes 610 coiled on the drive wheel. The released pull ropes 610 cause the movable pulley 620 to fall, simultaneously causing the first lifting frame 260 to fall. The falling first lifting frame 260 drives the second lifting frame 240 and the third lifting frame 220 to fall simultaneously, realizing the adjustment and corresponding position of the different heights of the bulging positions of the ancient city wall to be repaired.

[0093] The implementation principle of the ancient city wall jacking device in this application embodiment is as follows:

[0094] 1. The jacking device body 900 is moved to the front of the ancient city wall to be repaired and its position is adjusted appropriately. The front support arm 510 and the rear support arm 540 are opened for support. The bottom jack 530 works to lift the jacking device body 900 upward and maintain a balanced state. At this time, the casters 680 are lifted off the ground, and several bottom jacks 530 fully support the jacking device body 900 on the ground and keep it stable.

[0095] Extend the jack rods of the third jack 520 of the front support arm 510 and the rear support arm 540 to contact the ground, so as to provide auxiliary support for the jacking device body 900 on a larger area of ​​the ground and maintain the stable balance of the jacking device body 900.

[0096] 2. The drive motor 630 of the lifting drive device 600 is working. The drive motor 630 pulls the pull rope 610 to lift the position of the first lifting frame 260 to the lowest position of the wall where the outer bulge to be repaired is located. The top rod of the jack 4 261 is aligned horizontally with the position of the outer bulge to be repaired. The drive motor 630 stops working and self-locks.

[0097] Start the second jack 310 on the first lifting frame 260. The lifting rod of the second jack 310 is raised and lowered, which simultaneously drives the second lifting frame 240, which is in contact with the upper end of the lifting rod, to be raised and lowered to the height of the outer bulge to be repaired at the second lowest position on the wall, so that the lifting rod of the jack 241 is horizontally aligned with the position of the outer bulge to be repaired.

[0098] Start the first jack 300. Adjust the height of the third lifting frame 220 with the top rod of the first jack 300 so that the lifting blade 221 connected to the third lifting frame 220 is lifted to the gap position at the upper end of the bulge of the ancient city wall to be repaired. Use hydraulic or limit pull method to make the lifting blade 221 enter the gap. The lifting blade 221 inserted into the gap simultaneously constrains the upper and lower positions of the third lifting frame 220.

[0099] 1. Continue to start the first jack 300. The jack rod of the first jack 300 will lift the third lifting frame 220 slightly upward. At this time, the third lifting frame 220 will simultaneously drive the lifting shovel 221 in the gap of the city wall to lift upward, and simultaneously lift the part of the city wall at the upper end of the gap, so as to relieve and offset the self-weight of the upper city wall on the lower city wall, and simultaneously set the pressure and load-bearing stress of the lower city wall to be repaired.

[0100] 2. Start jacks 4.261 and jack 5.241. The jack rods of jacks 4.261 and jack 5.241 will extend forward and push the bulging wall surface inward to repair the work.

[0101] The construction method and steps adopted in the actual application of this technical solution's structural design are as follows:

[0102] 1.1 The jacking frame 100 consists of four long I-beam columns, two I-beam longitudinal beams at the bottom and top, and short I-beam crossbeams connected by bolts. The two sides of the middle part of the I-beam frame are also constructed by connecting crossbeams by bolts.

[0103] 1.2 The jacking system is operated by hydraulic jacks;

[0104] 1.3 The lifting system is connected to the stationary pulley 640 fixed to the first lifting frame 260 by the drive motor 630 through the pull rope 610, similar to the winch, to realize the lifting and moving of the jacking system. Four hydraulic jacks are placed in the gaps of each lifting frame, and the distance between the upper and lower lifting frames can be adjusted as needed.

[0105] 1.4 Preparation for jacking

[0106] 1. To prevent the jacking of the city wall during construction from causing other parts to bulge further, steel pipe supports need to be used to reinforce the exterior of the city wall within a certain range of the jacking. The supports are divided into 500×500mm grids, with diagonal braces at the back for support. During construction, the jacking is carried out in grids, and the steel pipe supports must be firmly anchored to the city wall. Any gaps between the supports and the city wall should be filled with hardwood.

[0107] 2. After the jacking device is assembled, raise the hydraulic jack under the trackless omnidirectional trolley to lift the trolley rollers off the ground and open the trolley guard arm. Since the actual jacking force is large, the back of the jacking device is also supported by 48mm scaffolding. The support is provided according to the actual site conditions and the support points set by the jacking device.

[0108] 1.5 Trial Push

[0109] Before the formal jacking operation, a trial jacking should be conducted, with the distance controlled at approximately 2cm. Relevant parameters during the jacking process should be accurately recorded and compared with theoretical parameters. Adjustments should be made to achieve optimal results. Parameters recorded during the trial jacking include the magnitude of the jacking force, equipment operation, deformation of the jacking device, and changes in the outer bulging wall. The data should be analyzed and compared with planned values. Any deviations should be adjusted promptly to ensure that the jacking parameters match the planned values, thus guaranteeing the smooth progress of the jacking operation.

[0110] 1.6 Top Push Method

[0111] Before the jacking operation, the jacking system must be thoroughly inspected to ensure it is functioning properly. The position of the jacking brackets should be adjusted using the upper, lower, left, and right sliding grooves. Once it is confirmed that there are no problems in the correct position, the on-site commander will issue an order to begin the jacking operation. The jacking force should be slowly applied by controlling the advancement of the jacks through the main control console. When the jacking force reaches 30%, 50%, 75%, and 100%, a comprehensive inspection of the load-bearing structure should be conducted to check for any deformation. Any problems found should be reported immediately.

[0112] 1.7 Key Operational Points

[0113] Depending on the situation on site, different jacking sequences need to be adopted because the extent and degree of the bulging of the city wall vary:

[0114] 1. For stones with a small degree of bulging (less than 1 / 2 the width of the stone block) and a length range of less than 2m, the position of the jacking jack is adjusted by using the upper, lower, left and right sliding grooves to sort the bulging degree and push the jacking jacks into place one by one from the grid with the largest degree of bulging.

[0115] 2. For stones with a small degree of bulging (less than 1 / 2 the width of the stone block) and a length range greater than 2m, the position of the jacking jacks is adjusted by moving the trolley and using the up, down, left, and right sliding grooves. The jacks are then arranged according to the degree of bulging, starting with the grid with the largest degree of bulging and jacking them into place one by one.

[0116] 3. When the bulge is large (greater than 1 / 2 the width of a stone block) and the length is less than 2m, start pushing from the point of maximum bulge. When pushing to 1 / 3 the width of a stone block, stop pushing and continue pushing from the point of maximum bulge to 1 / 3 the width of a stone block. Repeat this operation until the wall within this range is pushed into place. Adjust the position of the jacking jacks by using the up, down, left, and right sliding grooves. The specific pushing distance per push depends on the actual site conditions.

[0117] 4. When the bulge is large (greater than 1 / 2 the width of a stone block) and the length range is greater than 2m, start pushing from the point of maximum bulge within that range. Push to 1 / 3 the width of a stone block, then stop pushing. Adjust the position of the jacks by moving the trolley and using the up, down, left, and right sliding grooves, and continue pushing from the point of maximum bulge for another 1 / 3 the distance of a stone block. Repeat this operation until the wall within that range is pushed into place. The specific pushing distance per push depends on the actual site conditions.

[0118] To improve operational safety during the jacking process, effective monitoring measures need to be implemented, as follows:

[0119] 3.1 Monitoring Content and Methods

[0120] City Wall Monitoring

[0121] During the jacking process, changes in the city wall need to be monitored. Two monitoring points are set up at the top, middle, and bottom of the city wall on the opposite side of the outer wall corresponding to the jacking, for a total of six monitoring points. A laser rangefinder is used for real-time monitoring. The area around the city wall during the jacking is observed visually in real time during the jacking process.

[0122] Monitoring of the jacking device

[0123] When monitoring the deflection of the jacking beam during jacking using a total station, measuring points can be set up on the outer side of the beam, with one measuring point at the mid-span and one on each side of each beam. Measurements can be taken before jacking, during jacking, and after jacking into place.

[0124] 3.2 Monitoring Frequency

[0125] 1. City Wall Monitoring. Data is collected once before, during, and after each jacking operation at the location opposite the city wall's jacking range.

[0126] 2. Monitoring of the jacking device. During trial jacking and when encountering high bottom jacking pressure, data on the deflection of the steel beam must be collected before, during, and after jacking.

[0127] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for jacking up ancient city walls, characterized in that: It includes a jacking device body (900), which is composed of a jacking frame (100), a jacking device (200), a moving system (500) and a lifting drive device (600); The moving system (500) is equipped with a drive motor (630) on its outside, and the drive motor (630) can drive the jacking device (200) to move up and down within the jacking frame (100); When the moving system (500) moves to the ancient city wall to be repaired, the jacking device (200) moves to the height of the ancient city wall that needs to be repaired. The lifting shovel (221) of the jacking device (200) is inserted into the gap at the upper end of the bulging position that needs to be repaired. The lifting shovel (221) relieves the pressure of the upper wall on the bulging part and is easy to push. Then, the jack is used to push the bulging of the ancient city wall inward to repair it. The jacking device (200) includes a first lifting frame (260), a second lifting frame (240), and a third lifting frame (220), which are installed sequentially from bottom to top in the inner cavity of the upright jacking frame (100). The four frame columns (130) of the jacking frame (100) are all provided with guide rail grooves. The edges of the first lifting frame (260), the second lifting frame (240), and the third lifting frame (220) are all embedded in the corresponding guide rail grooves of the frame columns (130), so that the first lifting frame (260), the second lifting frame (240), and the third lifting frame (220) can all move up and down along the guide rail grooves of the frame columns (130). The first lifting frame (260) is provided with several horizontally pushing jacks (261), the jacks (261) extend outwards, and the jacks extend to the same side as the front support arm (510). The second lifting frame (240) is provided with several horizontally pushing jacks (241), the jacks (241) extend outwards, and the jacks extend to the same side as the front support arm (510). The third lifting frame (220) is provided with a plurality of outwardly extending lifting blades (221), and the upper edge of the head of the lifting blades (221) is provided with a bevel (222); The extension direction of the lifting blade (221) is consistent with the extension direction of the push rod of jack four (261) and jack five (241).

2. The ancient city wall jacking device as described in claim 1, characterized in that: The lower ends of the four frame columns (130) included in the jacking frame (100) are all fixed to the upper end of the moving system (500) with detachable bolts. The upper end of the frame column (130) is fixed to the top frame (120), and the frame column (130) with its bottom fixed to the moving system (500) and its top fixed to the top frame (120) forms an upright cuboid component with an internal cavity.

3. The ancient city wall jacking device as described in claim 1, characterized in that: The lower end of the mobile system (500) is provided with several casters (680) and a bottom jack (530), and the bottom jack (530) is located on the outside of the casters (680); The casters (680) can stably support the main body consisting of the jacking frame (100), the jacking device (200), the moving system (500), and the lifting drive device (600); The bottom jack (530) can stably support the main body consisting of the jacking frame (100), jacking device (200), moving system (500) and lifting drive device (600); The mobile system (500) is provided with front support arms (510) at both ends of its outer side. The lower end of the head of the front support arm (510) is provided with a third jack (520). The upper support arm of the front support arm (510) is connected to the corresponding frame column (130) by a connecting hinge (5101). The lower arm of the front support arm (510) is movably connected to the outer wall of the mobile system (500) by a movable page. The front support arm (510) can swing circumferentially with the connecting hinge (5101) and the movable page. The mobile system (500) is equipped with a rear support arm (540) and a lower support block (550) at both ends on the other side. The lower support block (550) has a third jack (520) at the lower end of its head. The rear support arm (540) has a lower support block (550) at its upper end. The frame column (130) at the same position has an upper support block (570) at its upper end. The upper end of the support frame (560) is fixed to the upper support block (570). The lower end of the support frame (560) is fixed to the lower support block (550). The support frame (560) forms an oblique support between the jacking frame (100) and the lower support block (550).

4. The ancient city wall jacking device as described in claim 1, characterized in that: A second jack (310) is provided at each of the four right-angle positions on the upper surface of the first lifting frame (260). The bottom of the second jack (310) is fixed to the end face of the first lifting frame (260). After the bottom of the second jack (310) is fixed, the top rod of the second jack (310) faces upward, and the upper end of the top rod of the second jack (310) abuts against the lower surface of the second lifting frame (240).

5. The ancient city wall jacking device as described in claim 1, characterized in that: The upper surface of the second lifting frame (240) is provided with four right-angle positions of the first jack (300). The top rod of the first jack (300) is fixed to the end face of the second lifting frame (240) at the bottom, and the upper part of the top rod of the first jack (300) abuts against the lower end face of the third lifting frame (220). The center lines of the first jack (300) and the second jack (310) are aligned.

6. The ancient city wall jacking device as described in claim 1, characterized in that: The lifting drive device (600) includes a drive motor (630), which is fixed to the outside of the moving system (500); The first lifting frame (260) is provided with movable pulleys (620) on both sides, and the installation direction of the movable pulleys (620) is consistent with the direction of the drive motor (630); The lower ends of both sides of the top frame (120) are provided with stationary pulleys (640), and the installation direction of the stationary pulleys (640) is consistent with the direction of the drive motor (630) and the movable pulley (620).

7. The ancient city wall jacking device as described in claim 6, characterized in that: A fixed ring is provided on one side of the stationary pulley (640). After one end of the pull rope (610) is connected and fixed to the fixed ring, the other end of the pull rope (610) extends downward and is connected to the movable pulley (620) around it before extending upward. The upward-extending pull rope (610) is connected to the stationary pulley (640) and extends downward. The downward-extending pull rope (610) is connected to the drive wheel on the rotating shaft of the drive motor (630). The pull rope (610) is wound around the drive wheel several times.

8. The ancient city wall jacking device as described in claim 6, characterized in that: When the drive motor (630) rotates in the forward direction, the drive wheel rotates and continuously coils the pull rope (610), pulling the pull rope (610) down and gathering it. The pulled rope (610) pulls down and gathers, and simultaneously causes the movable pulley (620) to rise. The first lifting frame (260) fixed to the movable pulley (620) is simultaneously lifted, and the lifted first lifting frame (260) drives the second lifting frame (240) and the third lifting frame (220) to be lifted simultaneously. When the drive motor (630) rotates in the reverse direction, the drive wheel rotates in the reverse direction to continuously release the pull rope (610) coiled on the drive wheel. The released pull rope (610) causes the movable pulley (620) to descend, which in turn causes the first lifting frame (260) to descend. The descending first lifting frame (260) drives the second lifting frame (240) and the third lifting frame (220) to descend synchronously.

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