Method for adjusting elevation and landing in place in building translation construction

Abstract

The invention belongs to the field of urban renewal construction, and relates to a method for adjusting elevation and landing in place in building translation construction. In the process that a building returns and resets to a newly-built basement top plate, firstly, a temporary platform composed of a heightening steel beam and a heightening steel cushion block is laid on the newly-built basement top plate in advance so as to solve the height difference problem existing between the newly-built basement top plate and a translation rail. Secondly, triangular haunching plates are additionally arranged at the corners of the wall clamping beams for supporting the building; and a landing jack is directly arranged below the haunching plate. By means of the arrangement mode, the eccentric bending moment borne by the underpinning structure is greatly reduced, and absolute safety in the landing process is ensured. And finally, a set of repeatable standardized circulating steps is designed, and the effect that the existing building is always reliably supported in the landing process is achieved. The invention aims to overcome the defects in the prior art, and provides the building translation landing method which is safe to operate, accurate to control and capable of effectively coordinating the foundation height difference and optimizing the landing stress path.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to a method for the overall translation and relocation of a building, and particularly a method that can effectively overcome the height difference of the foundation top slab and achieve safe and controllable descent during the translation, relocation and repositioning of a building. Background Technology

[0002] With economic and urban development and rising demands, urban renewal and the renovation of existing buildings are facing urgent needs. Central urban areas, especially historic districts in the city's core, often lack underground space due to their early construction, resulting in inadequate commercial facilities, parking difficulties, and a lack of vitality, thus facing urgent and arduous renovation tasks. Currently, with the acceleration of urban renewal in central urban areas, the demand for intensive land use and functional upgrading is increasingly pressing. Against this backdrop, developing underground space (such as underground parking lots, commercial facilities, and transportation hubs) beneath existing historical buildings or important structures while preserving them has become a key strategy for increasing the value of existing land and optimizing the city's functional layout. This "preservation above, development below" model can maximize the protection of the city's character and cultural heritage while efficiently expanding urban spatial capacity.

[0003] However, this model presents unprecedented challenges to engineering construction technology. The overall building relocation technology is an effective method for developing underground space in existing buildings. One of its core components is the need to lift and temporarily relocate the existing building as a whole, and then, after the underground structure construction is completed, precisely move it back and safely lower it onto the newly built basement roof. But this process faces multiple technical difficulties: (1) There is usually a significant height difference between the construction elevation of the new basement roof slab and the original foundation or temporary translation track. In addition, the surface of the basement roof slab is often uneven due to the needs of the building function.

[0004] (2) How to smoothly, controllably and without impact transfer the huge vertical load of the building from the temporary translation system to the permanent basement roof structure is the core issue concerning the structural safety of the building and the safety of the new substructure.

[0005] Existing conventional translation and placement technologies are mostly designed for flat ground or conditions with minimal elevation differences, lacking mature solutions for addressing complex elevation differences, precise load transfer, and stress optimization. Therefore, developing a construction method suitable for the specific scenario of "underground space development beneath existing buildings" in urban renewal, capable of overcoming significant elevation differences and achieving stable, ultra-low-level descent and precise load transfer, has become a critical technological bottleneck urgently needing to be overcome in this field. This invention is proposed based on this pressing engineering need. Summary of the Invention

[0006] This invention provides a method for adjusting elevation and lowering into position during building relocation construction, particularly suitable for developing underground space beneath existing buildings in central urban areas through reciprocating relocation. The purpose of this invention is to overcome the shortcomings of existing technologies and provide a building relocation and lowering method that is safe to operate, precisely controlled, effectively coordinates foundation elevation differences, and optimizes the landing force path.

[0007] The specific construction steps are as follows: Step 1: First, widen and reinforce the foundation of the existing building to form a wall beam structure supporting the entire building. Haunch plates are installed at the corners of the wall beam structure, and the bottom of the wall beam structure serves as a walking platform. Use the walking platform to move the existing building to the predetermined position on the roof of the new basement. Since there is usually a height difference between the original site and the roof of the new basement during the translation process, raised steel beams and raised steel blocks need to be installed on the roof of the new basement before the building is positioned. Raised steel beams are then installed on the raised steel blocks, serving as the translation track for the walking platform.

[0008] Step 2: After the existing building is moved to the predetermined position, a lowering jack and a first steel pad are installed below the haunch plate. The first steel pad is placed on the top slab of the new basement. The lowering jack is used to tighten the haunch plate. At this time, the load of the existing building is transferred to the lowering jack below the haunch plate. On this basis, the walking device, raised steel beam and raised steel pad under the wall beam structure are removed in sections.

[0009] Step 3: Install a second steel pad under the foundation of the existing building. The second steel pad is built up from the top of the new basement slab. The distance between the foundation of the existing building and the second steel pad is determined based on the descent stroke of the jack.

[0010] Step 4: Control the hydraulic system of the lowering jack to release pressure and lower the building. After one stroke, the existing building will land on the second steel pad directly below the foundation. At this time, the load of the existing building will be transferred to the second steel pad.

[0011] Step 5: Remove one section of the first steel pad below the lowering jack, extend the hydraulic cylinder of the lowering jack, and tighten the armhole plate again. At this time, the load of the existing building is transferred to the lowering jack below the armhole plate.

[0012] Repeat steps three through five until the existing building is lowered onto the roof of the new basement.

[0013] Step Six: Pour connecting material into the gap between the existing building's foundation and the wall beam structure and the new basement roof slab. After the connecting material reaches the design strength, remove the lowering jacks and the haunch plates.

[0014] Based on the above technical features, in step three, limiting devices are installed on both sides of the wall beam structure to prevent the accuracy of the landing position from being affected by factors such as wind load during the landing process.

[0015] Based on the above technical features, the connecting material in step six is ​​micro-expansion concrete or high-strength grout.

[0016] The development of underground space using a reciprocating translation method often faces the following challenges: there is a significant height difference between the new basement roof slab and the original ground level or translation track, and the new basement roof slab itself may also be uneven. The challenge lies in how to smoothly, without impact, and controllably transfer the building's massive load from a temporary translation system to the permanent basement roof structure, avoiding damage to the existing building and basement structure during the translation process.

[0017] The technical solution in this invention is conceived as follows: Adopting a general approach of "leveling and jacking – cyclic jacking and lowering – alternating load transfer," the one-time, high-risk, large-drop descent is broken down into multiple, small-step, and consistently controlled precision operation procedures. Based on this, the application point of the lowering jacks is optimized; specifically, by setting a triangular haunch plate at the corner of the wall beam as the application point of the lowering jacks, the stress on the existing building during the descent process can be significantly improved, enhancing the safety of the descent.

[0018] First, a temporary platform consisting of raised steel beams and heightened steel blocks is pre-laid on the roof slab of the newly constructed basement. This platform serves two purposes: first, it extends the translation track, allowing the building to "move" to the correct plane; second, it precisely levels the surface, eliminating the height difference between the roof slab of the newly constructed basement and the translation track.

[0019] Secondly, current methods for raising or lowering buildings in relocation projects typically involve using structural measures such as upward-facing corbels. However, this approach can lead to eccentric bending moments between the wall beams and the foundation of the relocated building, causing cracking or even separation of the wall beams and foundation, thus threatening the safety of the superstructure. This invention innovatively adds a triangular haunch plate at the angle of the "wall beams" supporting the building. The lowering jacks are then placed directly below the haunch plate. This arrangement is simple in construction, economical in cost, and significantly reduces the eccentric bending moment on the supporting structure, fundamentally preventing the most dangerous situation of the wall beams separating from the foundation during lowering, ensuring absolute safety during the process.

[0020] Finally, a set of repeatable standardized cyclic steps (i.e., the cycle of steps three to five) was designed to ensure that the existing building is always reliably supported during the landing process, thereby ensuring a gradual and safe landing. Attached Figure Description

[0021] Figure 1 This is a cross-sectional working condition diagram of step one in this invention.

[0022] Figure 2 This is a cross-sectional schematic diagram of step two in this invention.

[0023] Figure 3 This is a cross-sectional working condition diagram of step three in this invention.

[0024] Figure 4 This is a cross-sectional schematic diagram of step four in this invention.

[0025] Figure 5 This is a cross-sectional schematic diagram of the working condition of removing the steel pad block below the armhole plate in step five of this invention.

[0026] Figure 6 This is a cross-sectional schematic diagram of the jack below the top height and armhole plate in step five of this invention.

[0027] Figure 7 This is a cross-sectional schematic diagram of the process of repeating steps three through five in this invention until the existing building is lowered into place.

[0028] Figure 8 This is a cross-sectional schematic diagram of the casting of the connecting material in step six of this invention.

[0029] Figure 9 This is a cross-sectional schematic diagram of the dismantling of the lowering jack and the armhole plate in step six of this invention.

[0030] Figure 10 This is a schematic diagram of the plan layout of the existing building, the wall beam structure, the haunch plate, the steel pad block and the lowering jack in this invention.

[0031] The labels in the diagram are as follows: 1. Existing building; 2. Wall beam structure; 3. Armhole plate; 4. Walking device; 5. Elevated steel beam; 61. First steel pad; 62. Second steel pad; 7. New basement roof slab; 8. Lowering jack; 9. Connecting material; 10. Limiting device; 11. Elevated steel pad. Detailed Implementation

[0032] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0033] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0035] This invention provides a method for adjusting elevation and lowering a building into position during construction, particularly suitable for developing underground space beneath existing buildings in central urban areas through reciprocating relocation. The purpose of this invention is to overcome the shortcomings of existing technologies and provide a safe, precise, and effective method for building relocation and lowering that coordinates foundation elevation differences and optimizes the landing force path. A detailed description is provided below with reference to the accompanying drawings.

[0036] The construction steps of this invention are as follows: Figures 1-10 As shown, a method for adjusting elevation and lowering into position during building relocation construction is described. The existing building 1 has a shallow foundation. The specific construction steps are as follows: Step 1 as follows Figure 1 As shown, the foundation of the existing building 1 is first widened and reinforced to form a wall beam structure 2 that supports the entire existing building 1. A haunch plate 3 is installed at the corner of the wall beam structure 2, and a walking device 4 is located at the bottom of the wall beam structure 2. The walking device 4 is used to move the existing building 1 to the predetermined position on the roof slab of the new basement 7. Since there is usually a certain height difference between the original site and the roof slab of the new basement 7 during the translation process, a raised steel beam 5 and raised steel pads 11 need to be installed on the roof slab of the new basement 7 before the translation. The raised steel pads 11 are placed under the raised steel beam 5, so that the raised steel beam 5 serves as the translation track for the walking device 4.

[0037] like Figure 10 As shown, the armhole plate 3 is a triangular plate, and the two sides of the triangular plate are fixed to the two intersecting wall beams respectively.

[0038] Step Two Figure 2As shown, after the existing building 1 is moved to the predetermined position, a lowering jack 8 and a first steel pad 61 are installed below the armhole plate 3. The first steel pad 61 is installed on the top slab 7 of the newly built basement. The lowering jack 8 is used to tighten the armhole plate 3. At this time, the load of the existing building 1 is transferred to the lowering jack 8 below the armhole plate 3. On this basis, the walking device 4, the raised steel beam 5 and the raised steel pad 11 below the wall beam structure 2 are removed in sections.

[0039] Step 3 as follows Figure 3 As shown, a second steel pad 62 is installed below the foundation of the existing building 1. A certain distance is left between the foundation of the existing building 1 and the second steel pad 62. This distance is the distance of one descent of the lowering jack 8.

[0040] like Figure 10 As shown, limiting devices 10 can be installed on both sides of the wall beam structure 2 during the descent process to prevent the accuracy of the descent position from being affected by factors such as wind load. The limiting devices can be made of steel components with a certain rigidity, which are vertically fixed to the top slab of the newly built basement and arranged close to the wall beam. By using multiple sets of limiting devices 10, the building can be prevented from swaying due to wind load or vibration during the descent, ensuring both descent safety and accuracy of the descent position.

[0041] Step four as follows Figure 4 As shown, the hydraulic system controlling the lowering jack 8 depressurizes and lowers the building. After one stroke, the existing building 1 lands on the second steel pad 62 directly below its foundation. At this point, the load of the existing building 1 is transferred to the second steel pad 62.

[0042] Step 5 Figure 5 and Figure 6 As shown, one section of the first steel pad 61 below the lowering jack 8 is disassembled, the hydraulic cylinder of the lowering jack 8 is extended, and the armhole plate 3 is tightened again. At this time, the load of the existing building 1 is transferred to the lowering jack 8 below the armhole plate 3.

[0043] Repeat steps three through five until the existing building 1 is lowered onto the newly constructed basement roof slab 7, as follows. Figure 7 As shown.

[0044] Step Six Figure 8 and Figure 9 As shown, connecting material 9 is poured into the gap between the foundation and the wall beam structure 2 of the existing building 1 and the roof slab of the newly built basement 7. Connecting material 9 can typically be micro-expansion concrete or high-strength grout. After the connecting material 9 reaches its design strength, the lowering jack 8 and the haunch plate 3 can be removed.

[0045] In summary, this technology adopts the overall approach of "leveling and paving – cyclic jacking and lowering – alternating load transfer," breaking down the one-time, high-risk, large-drop descent into a precise operational process of multiple, small-step descents with consistently controlled loads. Based on this, the application point of the jacks is optimized by setting a triangular haunch plate at the corner of the wall beam as the application point, which significantly improves the stress on the existing building during descent and enhances the safety of the process. This achieves the goals of underground space development and building function enhancement while ensuring the safety of the existing building.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A method for adjusting elevation and lowering into position during building translation construction, characterized in that: Step 1: First, widen and reinforce the foundation of the existing building (1) to form a wall beam structure (2) to support the entire existing building (1). A haunch plate (3) is set at the corner of the wall beam structure (2), and a walking device (4) is set at the bottom of the wall beam structure (2). A heightening steel pad (11) is set on the top slab (7) of the new basement, and a raised steel beam (5) is set on the heightening steel pad (11) so that the raised steel beam (5) serves as the translation track of the walking device (4). The existing building (1) is translated to the predetermined position of the top slab (7) of the new basement using the walking device (4). Step 2: After the existing building (1) is moved to the predetermined position, a lowering jack (8) and a first steel pad (61) are installed below the armhole plate (3). The first steel pad (61) is installed on the top slab (7) of the newly built basement. The lowering jack (8) is used to tighten the armhole plate (3). At this time, the load of the existing building (1) is transferred to the lowering jack (8) below the armhole plate (3). On this basis, the walking device (4), the raised steel beam (5) and the raised steel pad (11) below the wall beam structure (2) are removed in sections. Step 3: A second steel pad (62) is installed below the foundation of the existing building (1). The second steel pad (62) is stacked above the top slab (7) of the newly built basement. There is a gap between the foundation of the existing building (1) and the second steel pad (62). The gap is determined according to the descent stroke of the jack (8). Step 4: Control the hydraulic system of the lowering jack (8) to release pressure and lower the building. After one stroke, the existing building (1) lands on the second steel pad (62) directly below the foundation. At this time, the load of the existing building (1) is transferred to the second steel pad (62). Step 5: Disassemble one section of the first steel pad (61) below the lowering jack (8), extend the cylinder of the lowering jack (8), and tighten the armhole plate (3) again. At this time, the load of the existing building (1) is transferred to the lowering jack (8) below the armhole plate (3). Repeat steps three through five until the existing building (1) is lowered onto the newly built basement roof slab (7); Step 6: Pour connecting material (9) into the gap between the foundation of the existing building (1) and the wall beam structure (2) and the top slab of the new basement (7). After the connecting material (9) reaches the design strength, remove the lowering jack (8) and the haunch plate (3).

2. The method for adjusting elevation and lowering into position during building translation construction according to claim 1, characterized in that: In step three, limiting devices (10) are set on both sides of the wall beam structure (2) to prevent the accuracy of the landing position from being affected by factors such as wind load during the landing process.

3. The method for adjusting elevation and lowering into position during building translation construction according to claim 1, characterized in that: The connecting material (9) in step six is ​​micro-expansion concrete or high-strength grout.

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