A building jacking apparatus and method

Abstract

The application relates to the field of building lifting, in particular to a building lifting equipment and method. The building lifting equipment comprises a base support frame, an additional support frame for being additionally arranged above the base support frame and a jack, the bottom of the jack is provided with a support leg, the base support frame and the additional support frame are both provided with a support hole, the support leg has a contraction state of being in contact with the upper side wall of the support hole and relatively contracting and an expansion state of being expanded to make the support leg stop cooperating with the lower side wall of the support hole in the stroke of rotating relative to the jack. When the jack rises together with the support leg, the support leg will contract and will not become an obstacle, and when the support leg descends, the support leg will cooperate with the support hole to facilitate the jack to lift upward; and the problems of cost increase and large labor intensity of workers caused by the fact that two groups of jack equipment are needed and artificial pads and gaskets are needed to be laid in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building lifting, in particular to a building lifting device and method. BACKGROUND

[0002] In recent years, with the deepening of urban renewal, building lifting has become one of the important means for the renovation and protection of urban building heritage. Building lifting is a construction method of lifting the entire building or part of the structure from the original foundation to a certain height. Before building lifting, a underpinning structure (also known as a temporary support structure or conversion beam) is usually constructed. The main function of this structure is to evenly transfer the weight of the building to the new foundation and ensure that the building remains stable during the lifting process. After the completion of the foundation underpinning, two groups of jacks (A / B) are used to alternately lift the building. Specifically, before the lifting construction, the A group of jacks supports the underpinning structure, and the original foundation wall and beam are removed. The building is converted from the original foundation to the A group of jacks. During the lifting construction, the A group of jacks completes the first lifting to form a new elevation, and the B group of jacks continues the second lifting at the new elevation. At this time, the weight is transferred to the B group of jacks. Then the A group of jacks completes the third lifting after manually adding blocks, and then the A group of jacks completes the third lifting. In this way, the building is lifted to the design elevation, and finally the temporary steel structure is used to support the building, and the jacks are removed. Then the permanent reinforced concrete foundation beam or wall is constructed.

[0003] However, this lifting method has the following disadvantages: 1) two sets of lifting jacks are required, which requires a large amount of equipment; 2) the corresponding position of the underpinning structure (tray beam) lifting jack is pre-buried with anchor plates, which makes the construction of the underpinning structure node reinforcement difficult and requires high positioning of the anchor plates; 3) the A / B group of jacks alternately lifts the building, which requires manual addition of blocks and washers to change the elevation of the jacks, resulting in a large demand for materials and a long construction time; 4) after the completion of the lifting construction, the A / B group of jacks requires a large amount of equipment to be removed, which involves the construction of the temporary support structure, which is time-consuming and costly. SUMMARY

[0004] Therefore, the present application provides a building lifting device to solve the problem of increased cost and labor intensity caused by the need for two groups of jacks and manual addition of blocks and washers in the prior art. The present application also provides a building lifting method to solve the above technical problems.

[0005] The utility model provides a kind of building jacking equipment, including the base support frame for being arranged below underpinning structure, the additional support frame for being additionally installed above base support frame and jack, base support frame and additional support frame are separately arranged, jack bottom is provided with support leg, base support frame and additional support frame are all provided with the support hole for accommodating support leg and being arranged in upper and lower interval on the both sides of jack, two sides support hole is symmetrically arranged, support leg has two groups and is respectively hinged on the both sides of jack, support leg has the retracted state that upper side wall of support hole is contacted and relatively retracted to support leg to cross different height support hole in the stroke of rotating relative to jack and the unfolded state that support leg enters support hole and is stopped with the lower side wall of support hole, the upper surface of support leg has first guide surface for being contacted with the upper side wall of support hole.

[0006] Further, the bottom of the jack is provided with a hinge shaft, and the support legs are hingedly arranged on the hinge shaft. At least one group of support legs is provided with a limiting structure for abutting against the other group of support legs when switching from the retracted state to the unfolded state.

[0007] Further, one of the groups of support legs has a groove, and the other group of support legs is provided with a protrusion matched with the groove. The protrusion constitutes the limiting structure, and the limiting structure is located above the hinge shaft.

[0008] Further, the building jacking equipment further comprises lifting legs located above the jack. The lifting legs have two groups and are respectively hingedly arranged on the both sides of the jack. The lifting legs have a retracted state that the upper side wall of the support hole is contacted and relatively retracted to the lifting legs to cross different height support holes in the stroke of rotating relative to the jack and an unfolded state that the lifting legs enter the support hole and are stopped with the lower side wall of the support hole. The upper surface of the lifting legs has a second guide surface for being contacted with the upper side wall of the support hole.

[0009] Further, mounting plates are respectively arranged between the jack and the support legs and between the jack and the lifting legs.

[0010] Further, the base support frame is provided with a plurality of groups of horizontally arranged rollers. The upper side wall and the lower side wall of the support hole are composed of the rollers.

[0011] Further, the first guide surface is an inclined surface that extends obliquely downward from the center to the edge when the support leg is in the unfolded state, and the edge of the first guide surface has a circular arc transition.

[0012] Further, the base support frame comprises a left stand and a right stand arranged separately. The jack is arranged between the left stand and the right stand. A connecting rod is further connected between the left stand and the right stand.

[0013] Further, the building jacking-up device further comprises a support frame base arranged at the bottom of the foundation support frame, and the support frame base is provided with an indicating structure for indicating the positions of the left and right vertical frames.

[0014] The building jacking-up device has the advantages that the foundation support frame can provide initial support for the underpinned structure during jacking-up, the jacks are arranged to actively jacking-up the building, the additional support frame is arranged to provide secondary support for the underpinned structure after the jacking-up of the jacks, the support legs are arranged on the jacks, the support holes are arranged on the foundation support frame and the additional support frame, the jacks and the foundation support frame are matched with each other, the support holes are arranged at different heights, the jacks are arranged at different heights when the support legs enter the support holes, the foundation support frame can also serve as the support base of the jacks, the support legs are hingedly arranged on both sides of the jacks and have a certain degree of rotation freedom, the support legs have a retracted state and an expanded state during rotation, the support legs are in contact with the upper side walls of the support holes and are retracted during rotation, the support legs are in contact with the lower side walls of the support holes when in the expanded state, the support legs are retracted when the jacks and the support legs rise, and the support legs are in contact with the support holes when the support legs descend, thereby facilitating the upward jacking-up of the jacks.

[0015] A building jacking-up method using the building jacking-up device, the foundation support frame is arranged at the bottom of the underpinned structure before jacking-up, the jacks and the support legs are installed in the foundation support frame, the jacks are jacked up once, the underpinned structure is jacked up to a certain distance from the support surface of the foundation support frame, the additional support frame is installed at the top of the foundation support frame, the top of the jacks is limited on the additional support frame, the jacks are retracted, the jacks drive the support legs to rise and are matched with the support holes at the corresponding height, the jacking-up of the jacks and the installation of the additional support frame are repeated until the preset height is reached.

[0016] The building jacking-up method has the beneficial effects that: the building jacking-up method first supports the foundation support frame at the bottom of the underpinning structure, which facilitates subsequent jacking-up of the underpinning structure, the jack and the support leg are placed in the foundation support frame at the same time, which facilitates assembly; after the jack completes one jacking-up, the distance between the underpinning structure and the foundation support frame becomes larger, at this time, the additional support frame is installed in the distance, that is, the support surface for supporting the underpinning structure is raised, the support leg can be raised relative to the foundation support frame and the additional support frame, the additional support frame can support the underpinning structure during the rising process, thereby facilitating the transfer of the weight from the jack to the support frame, facilitating the use of the jack to rise and insert the support leg into the support holes with different heights, that is, the jack can climb up using the support leg at the bottom and the support hole, so that different support holes become jacking-up foundations, and a single group of jacks can also gradually raise the position of the jack, thereby solving the problems of cost increase and large labor intensity of workers caused by the need for two groups of jack devices and manual placement of pads and washers in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 The structural schematic diagram of the foundation support frame in the embodiment of the building jacking-up device in the present application;

[0019] Figure 2 The front view of the foundation support frame in the embodiment of the building jacking-up device in the present application;

[0020] Figure 3 The structural schematic diagram of the additional support frame in the embodiment of the building jacking-up device in the present application;

[0021] Figure 4 The front view of the additional support frame in the embodiment of the building jacking-up device in the present application;

[0022] Figure 5 The cooperation schematic diagram of the additional support frame and the top cover plate in the embodiment of the building jacking-up device in the present application;

[0023] Figure 6 The structural schematic diagram of the support frame base in the embodiment of the building jacking-up device in the present application;

[0024] Figure 7Assembling diagram of foundation support frame and additional support frame in the embodiment of the building jacking device in the application;

[0025] Figure 8 Structure diagram of self-climbing jack in the embodiment of the building jacking device in the application;

[0026] Figure 9 Cooperation diagram of self-climbing jack and foundation support frame in the embodiment of the building jacking device in the application (before jacking);

[0027] Figure 10 Cooperation diagram of self-climbing jack and foundation support frame in the embodiment of the building jacking device in the application (after jacking);

[0028] Figure 11 Assembling diagram of left and right vertical frames in the embodiment of the building jacking method in the application;

[0029] Figure 12 Assembling diagram of connecting rod in the foundation support frame in the embodiment of the building jacking method in the application;

[0030] Figure 13 First jacking diagram of self-climbing jack in the embodiment of the building jacking method in the application;

[0031] Figure 14 Assembling diagram of additional support frame after completing the first jacking in the embodiment of the building jacking method in the application;

[0032] Figure 15 Another view assembling diagram of additional support frame after completing the first jacking in the embodiment of the building jacking method in the application.

[0033] Meaning of the reference numerals in the figure: 1, foundation support frame; 11, left vertical frame; 12, right vertical frame; 13, support hole; 14, roller; 15, connecting rod; 2, support frame base; 21, indicating protrusion; 3, additional support frame; 31, left U-shaped frame; 32, right U-shaped frame; 33, stop recess; 34, stop protrusion; 35, top cover plate; 36, connecting pin; 4, support leg; 41, first mounting plate; 42, ear plate; 43, limiting protrusion; 44, limiting recess; 5, lifting leg; 51, second mounting plate; 6, jack; 7, underpinning structure. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the present application clearer, the following will describe the present application with specific embodiments shown in the drawings. However, it should be understood that the description is only exemplary but not intended to limit the scope of the present application. Moreover, in the following description, the description of the well-known structures and techniques is omitted to avoid unnecessary obscurity of the concept of the present application.

[0035] The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used in the present disclosure and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or," as used herein, refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0036] It should be understood that, although the terms first, second, third, etc. can be employed in this disclosure to describe various information, these information should not be limited to these terms, and should not be understood as indicating or implying that any or all of the information is of a certain rank or importance. These terms are used only to distinguish one type of information from another type of information. For example, without departing from the scope of the present disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information. Depending on the context, the word "if" as used herein can be interpreted as meaning "when" or "in response to determining" as used herein.

[0037] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and should not be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application.

[0038] In the description of the present application, unless otherwise specified and limited, it should be noted that the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be mechanical connection or electrical connection, or the communication between the internal elements, or direct connection, or indirect connection through intermediate medium, and the specific meaning of the above terms can be understood by the person skilled in the art according to the specific circumstances.

[0039] In the following description, the suffix such as "module", "part" or "unit" used to represent an element is only for the convenience of description of the present application, and has no specific meaning by itself. Therefore, "module" and "part" can be used interchangeably.

[0040] In order to better understand the technical solutions of the present application, the present application will be described in detail below with reference to the drawings.

[0041] In the embodiment 1 of the building jacking device in the present application:

[0042] The building jacking device in the present embodiment comprises a support frame arranged at the bottom of the underpinning structure, and a self-climbing jack is further arranged in the support frame. The self-climbing jack can be jacked based on the support frame. A support hole is arranged on the support frame. The support holes are arranged at intervals up and down. When the self-climbing jack is located in different support holes, the initial height of the self-climbing jack is different. This avoids manual setting of washers and pads and saves the setting of another group of jacks.

[0043] During the jacking of the building, the height of the building and the underpinning structure is constantly increasing. In order to enable the support frame to support the constantly increasing underpinning structure, it is necessary to keep the height of the support frame increasing. For example, Figures 1-4 As shown in the figure, the support frame in the present embodiment comprises a base support frame 1 and an additional support frame 3. The base support frame 1 and the additional support frame 3 are arranged separately. The additional support frame 3 is arranged on the top of the base support frame 1 to facilitate the increase of the height of the support frame.

[0044] The base support frame 1 comprises a left stand 11 and a right stand 12 arranged separately. The left stand 11 and the right stand 12 are in the form of a plate as a whole. The left stand 11 and the right stand 12 are arranged in parallel at intervals. The structures of the left stand 11 and the right stand 12 are opposite but symmetrical. The structure of one of the stands will be described. The left stand 11 comprises columns and partitions. Three columns are arranged vertically. The partitions are arranged between adjacent columns, thereby dividing the left stand 11 into a grid structure. The holes in the grid are support holes 13. In order to maintain the structural strength of the base support frame 1 during the supporting process, the columns and the partitions are integrally formed. In order to facilitate the connection of the left stand 11 and the right stand 12 into a whole, a connecting rod 15 is further arranged between the left stand 11 and the right stand 12. Connecting holes or connecting screws are further arranged at the ends of the left stand 11 and the right stand 12 for connecting with the connecting rod 15. The connecting rods 15 are arranged on both sides of the left stand 11 and the right stand 12. The connecting rods 15 on each side form a Z shape, thereby enabling the left stand 11, the right stand 12 and the connecting rod 15 to be combined into a base support frame 1 with high structural strength. Of course, in other embodiments, the connecting rod can be arranged in other forms, or the base support frame can be arranged in one piece.

[0045] In order to facilitate the installation, the left stand 11 and the right stand 12 are placed in place, the base support frame 1 is also provided with a support frame base 2 at the bottom, the support frame base 2 is plate-shaped, and four L-shaped indicating protrusions 21 are further provided on the upper plate surface of the support frame base 2, which define the installation positions of the left stand 11 and the right stand 12, that is, as long as the left stand 11 and the right stand 12 are arranged close to the L-shaped indicating protrusions 21, the left stand 11 and the right stand 12 can be guaranteed to meet the installation position, and the connecting rod 15 can be conveniently assembled to the base support frame 1. In order to improve the strength, the L-shaped indicating protrusions 21 are further provided with reinforcing ribs on the outside. Alternatively, in other embodiments, the form of the support frame base can be changed, and only marks are left on the upper side without protrusions, which only serve as an indication. Alternatively, in other embodiments, the support frame base can no longer be provided.

[0046] The added support frame 3 is provided in a split manner, which facilitates the installation of the added support frame 3 around the jack 6 when the jack 6 is in the state of resisting the support replacement structure 7. Specifically, the added support frame 3 includes a left U-shaped frame 31 and a right U-shaped frame 32 provided in a split manner. The U-shaped frames on both sides are the same structure and are arranged staggered at the port position, thereby being able to be assembled into a frame shape. Long holes are formed on the U-shaped side walls of the left U-shaped frame 31 and the right U-shaped frame 32, and the long holes on both sides cooperate with each other after the connecting pin 36 is inserted, so that the left U-shaped frame 31 and the right U-shaped frame 32 can be assembled together. In order to avoid the base support frame 1 and the added support frame 3 being assembled together and being staggered with each other in the horizontal plane, causing the support to fail, a plurality of stop recesses 33 are provided at the top end of the base support frame 1, and stop protrusions 34 adapted to the stop recesses 33 are provided at the bottom end of the added support frame 3, and the stop recesses 33 and the stop protrusions 34 cooperate with each other to limit the horizontal plane. Similarly, the stop recesses 33 are also provided at the top end of the added support frame 3, which facilitates the adaptation of the bottom end of another added support frame 3. In addition, on the uppermost added support frame 3, since it is no longer necessary to assemble other added support frames 3, a top cover plate 35 is provided on the uppermost added support frame 3, and the stop recesses 33 on the added support frame 3 are covered by using the top cover plate 35. Of course, in other embodiments, the stop recesses and the stop protrusions can no longer be provided, and the added support frame and the base support frame can be welded together after being connected.

[0047] The self-climbing jack comprises a jack 6, a supporting leg 4 arranged at the bottom of the jack 6 and a lifting leg 5 arranged at the top of the jack 6. Specifically, a mounting plate is arranged at the bottom of the self-climbing jack, which is referred to as a first mounting plate 41, and the plate surface of the first mounting plate 41 is perpendicular to the extension direction of the jack 6. The first mounting plate 41 is arranged between the jack 6 and the supporting leg 4, and an ear plate 42 is arranged at the bottom of the first mounting plate 41, and the supporting leg 4 is hingedly arranged on the ear plate 42, so that the supporting leg 4 is indirectly hingedly arranged on the jack 6. Meanwhile, a second mounting plate 51 is arranged at the top of the jack 6, and an ear plate 42 is arranged at the top of the second mounting plate 51, and the lifting leg 5 is hingedly arranged on the ear plate 42. The supporting leg 4 and the lifting leg 5 facilitate the climbing of the jack 6, that is, the jack 6, the supporting leg 4 and the lifting leg 5 jointly constitute the self-climbing jack.

[0048] The supporting leg 4 and the lifting leg 5 have the same structure, and the supporting leg 4 in the embodiment is taken as an example for structural description. The supporting leg 4 is provided with two groups, and the two groups of supporting legs 4 are arranged on the two sides of the jack 6, respectively, and have the same hinge shaft with the jack 6. The supporting leg 4 has a retracted state in which the supporting leg 4 is in contact with the upper side wall of the supporting hole 13 and is relatively retracted to support the supporting leg 4 to cross the supporting hole 13 of different heights, and an expanded state in which the supporting leg 4 enters the supporting hole 13 and is in stop cooperation with the lower side wall of the supporting hole 13. The one-way upward movement of the supporting leg 4 can be realized by switching the two states of the supporting leg 4. In order to realize stable support in the supporting state, a limiting structure for abutting to the other group of supporting legs 4 when the retracted state is converted to the expanded state is arranged on one group of supporting legs 4, specifically, one group of supporting legs 4 has a limiting recess 44, and the other group of supporting legs 4 is provided with a limiting protrusion 43 matched with the limiting recess 44, and the limiting protrusion 43 constitutes the limiting structure, and the limiting structure is located above the hinge shaft. When the supporting leg 4 moves upward, it will be in contact with the upper side wall of the supporting hole 13, so that the end of the supporting leg 4 is relatively close, so that the size of the supporting leg 4 in the horizontal plane is reduced, facilitating the upward movement, and when descending, the two groups of supporting legs 4 are in the expanded state, at this time, the supporting leg 4 is in stop cooperation with the lower side wall of the supporting hole 13, at this time, the supporting leg 4 can serve as the base of the jack 6 to lift the jack 6, that is, under the action of the supporting leg 4, the jack 6 can only rise but cannot descend.

[0049] In order to better let the jack 6 continue to rise, the lifting leg 5 is arranged in the same direction as the supporting leg 4. That is, the lifting leg 5 can only move upward and cannot move downward. When the telescopic rod of the jack 6 is elongated, the supporting leg 4 is matched with the lower side wall of the supporting hole 13, and the supporting leg 4 cannot descend. At this time, the lifting leg 5 is matched with the upper side wall of the supporting hole 13 to reach the retracted state, which is convenient for the lifting leg 5 to rise until the lifting leg 5 rises into a higher supporting hole 13. After the jack 6 completes a time of jacking, the telescopic rod of the jack 6 needs to be retracted. In the retraction process, the lifting leg 5 of the self-climbing jack is matched with the lower side wall of the supporting hole 13, so that only the supporting leg 4 can rise. At this time, the supporting leg 4 is matched with the upper side wall of the supporting hole 13, and after entering the retracted state, it rises into the upper supporting hole 13. When the telescopic rod of the jack 6 is elongated again, the jack 6 can take a new supporting hole 13 located higher as the lifting basis of the jack 6. That is, the two groups of jacks 6 do not need to be replaced manually, and a single group of jacks 6 can realize step-by-step rising.

[0050] In order to realize automatic switching between the expanded state and the retracted state, a roller 14 is arranged between the columns between the left stand 11 and the right stand 12 in the embodiment. The roller 14 is located on the inner side of the stand, which is convenient for directly cooperating with the supporting leg 4 and the lifting leg 5. The upper surface of the supporting leg 4 for contacting the upper side wall of the supporting hole 13 constitutes a first guide surface capable of guiding the supporting leg 4 during the two state switching processes. The first guide surface is an inclined surface extending obliquely downward from the center to the edge when the supporting leg 4 is in the expanded state, and the edge of the first guide surface has a circular arc transition. During the rising process of the supporting leg 4, through the first guide surface arranged obliquely and the circular arc transition at the edge position, the supporting leg 4 can be slightly deformed through extrusion and interference fit after cooperating with the roller 14. When the supporting leg 4 passes the roller 14, the stress on the supporting leg 4 disappears, and the deformation also disappears. At this time, the supporting leg 4 expands outward. Since the supporting leg 4 only has a circular arc transition upward, the supporting leg 4 cannot pass the roller 14 downward again after cooperating with the roller 14, thereby realizing one-way rising of the supporting leg 4. The roller 14 also constitutes the upper side wall or the lower side wall of the supporting hole 13. Of course, the lifting leg 5 and the supporting leg 4 have the same structure. Of course, in other embodiments, elastic members can be arranged between the two supporting legs 4. The elasticity of the elastic members themselves can make the two supporting legs 4 only become the retracted state under the action of external force. Or, in other embodiments, the roller 14 is not arranged. At this time, the supporting leg 4 directly contacts the side supporting hole 13.

[0051] In the embodiment of the building jacking method in the application:

[0052] In the building jacking method of the embodiment, first, the setting of the jacking foundation needs to be completed. Specifically, first, the foundation support frame 1 needs to be installed in place. The support frame base 2 is placed at the bottom of the building to be jacked, the left side stand 11 and the right side stand 12 of the foundation support frame 1 are respectively placed at the bottom of the building and the underpinning structure 7, the self-climbing jack (i.e. the jack 6 together with the support legs 4 at the bottom and the lifting legs 5 at the top) is placed between the left side stand 11 and the right side stand 12, and the connecting rod 15 is installed on the left side stand 11 and the right side stand 12, so that the foundation support frame 1 is formed. Then, the jack 6 is started, so that the telescopic rod of the jack 6 is extended, the overall size of the self-climbing jack is elongated, the jack 6 jacks up the underpinning structure 7, until the jack 6 is elongated to the preset height, at this time the support legs 4 are supported on the lower side wall of the support hole 13, the lifting legs 5 are retracted under the action of the upper side wall of the support hole 13, can move upward beyond the support hole 13, and at this time the lifting legs 5 pass through the foundation support frame 1, so that the foundation support frame 1 and the underpinning structure 7 keep a large gap.

[0053] When one jacking is completed, first, the additional support frame 3 is installed on the foundation support frame 1. Because the jack 6 has jacked up the underpinning structure 7 to a certain height, there is space to install the additional support frame 3. The left side U-shaped frame 31 and the right side U-shaped frame 32 of the additional support frame 3 are respectively arranged on both sides of the telescopic rod of the jack 6, and the support legs 4 are accommodated in the support holes 13 of the additional support frame 3. Then the two U-shaped frames are spliced, at this time the support legs 4 are limited in the support holes 13 of the additional support frame 3. Then the telescopic rod of the jack 6 is retracted, at this time the lifting legs 5 are stopped by the lower side wall of the support hole 13, and the support legs 4 can be retracted and move upward beyond the support hole 13 under the limitation of the upper side wall of the support hole 13. That is, during the extension and retraction of the jack 6, the lifting of the lifting legs 5 is first completed, and then the lifting of the support legs 4 is performed, so that the self-climbing jack can always move upward during the telescopic movement.

[0054] Finally, when reaching the preset height, the top cover plate 35 is installed on the uppermost additional support frame 3 to cover the top groove. Then the jack 6 needs to be removed, the support frame is made into a permanent support, the support legs 4 and the pin shaft on the climbing legs are pulled out, at this time the support legs 4 and the lifting legs 5 are separated from the jack 6 and can be taken out of the support hole 13 separately, and finally the jack 6 is taken out of the support hole 13, which is convenient for pouring and other operations.

[0055] It is worth noting that when the jack 6 is completed, the height of the supporting and replacing structure 7 is greater than the upper surface of the added support frame 3, and at this time, the lifting leg 5 is kept away from the lower surface of the supporting hole 13. When the added support frame 3 is installed, the added support frame 3 is not stressed, and then the jack 6 is retracted. At this time, since the lifting leg 5 is not in contact with the supporting hole 13, the top end of the telescopic rod of the jack 6 will drop until the supporting leg 4 is in contact with the lower side wall of the supporting hole 13. That is, the height of the supporting and replacing structure 7 rises with the extension of the jack 6. In the process of the jack 6 descending, the supporting and replacing structure 7 will first descend with the jack 6, and then the height remains unchanged. Through such a design, the installation of the added support frame 3 is facilitated.

[0056] It should be clear that the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

Claims

1. A building jacking apparatus characterised in that: The building jacking-up device comprises a foundation support frame arranged below a underpinning structure, an additional support frame arranged above the foundation support frame, and a jack, the foundation support frame and the additional support frame are arranged separately, the bottom of the jack is provided with support legs, the foundation support frame and the additional support frame are both provided with support holes arranged in an upper and lower interval on both sides of the jack for accommodating the support legs, the support holes on both sides are arranged symmetrically, the support legs have two groups and are respectively arranged on both sides of the jack in a hinged manner, the support legs have a retracted state in which the support legs are in contact with the upper side walls of the support holes and are retracted relatively to cross the support holes of different heights, and an expanded state in which the support legs enter the support holes and are in stop cooperation with the lower side walls of the support holes, the upper surfaces of the support legs have first guide surfaces for being in contact with the upper side walls of the support holes; the bottom of the jack is provided with a hinge shaft, the support legs are arranged on the hinge shaft in a hinged manner, at least one group of the support legs is provided with a limiting structure for abutting against the other group of the support legs when the retracted state is converted into the expanded state; one group of the support legs has a groove, the other group of the support legs is provided with a protrusion matched with the groove, the protrusion constitutes the limiting structure, and the limiting structure is located above the hinge shaft.

2. Building jacking apparatus according to claim 1, characterised in that: Mounting plates are arranged between the jack and the support legs and between the jack and the lifting legs.

3. The building jacking apparatus according to claim 1, wherein: The foundation support frame is provided with a plurality of groups of horizontally arranged rollers, and the upper side walls and the lower side walls of the support holes are both composed of the rollers.

4. Building jacking apparatus according to claim 3, characterised in that: The first guide surface is an inclined surface extending obliquely downward from the center to the edge when the support legs are in the expanded state, and the edge of the first guide surface has a circular arc transition.

5. The building jacking apparatus according to claim 1, wherein: The foundation support frame comprises a left stand and a right stand arranged separately, the jack is arranged between the left stand and the right stand, and a connecting rod is further connected between the left stand and the right stand.

6. Building jacking apparatus according to claim 5, characterised in that: The building jacking-up device further comprises a support frame base arranged at the bottom of the foundation support frame, and the support frame base is provided with an indicating structure for indicating the positions of the left stand and the right stand.

7. A method of jacking a building, characterised in that: The building jacking-up device is used to set the foundation support frame at the bottom of the underpinning structure before jacking-up, install the jack together with the support leg in the foundation support frame, complete one jacking-up of the jack, jacking-up the underpinning structure to a distance from the support surface of the foundation support frame, install the additional support frame at the top of the foundation support frame, limit the top of the jack on the additional support frame, then control the jack to shrink, make the jack drive the support leg to rise and adapt to the support hole of the corresponding height, and cyclically perform the jacking-up of the jack and the installation of the additional support frame until the preset height is reached.

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