Efficient deep foundation pit brace replacement and super high-rise "super tower back doing" construction method
By dividing the basement construction area into tower and non-tower areas, and utilizing openings for support replacement and construction design optimization, the problems of difficult removal of turnover materials, low construction efficiency, and significant safety hazards in the construction of basements for super high-rise buildings have been solved, achieving an efficient and safe construction process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA CONSTR EIGHTH ENG BUREAU HUAZHONG CONSTR CO LTD
- Filing Date
- 2025-03-17
- Publication Date
- 2026-07-03
Smart Images
Figure CN120139230B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of building construction technology, and in particular to an efficient method for deep foundation pit support replacement and super high-rise "super tower post-construction" construction. Background Technology
[0002] In the construction of super high-rise buildings, the super high-rise tower and the surrounding podium are usually constructed simultaneously. While this significantly improves construction efficiency, it also brings a series of extremely difficult problems in basement construction. This is especially true in projects with complex surrounding environments, tight construction schedules, and large-scale underground engineering projects, where these basement construction challenges are even more severe.
[0003] Basement internal bracing replacement is a crucial step in deep foundation pit construction to ensure pit stability and construction safety. When basement construction uses a sequential method, the basement floor slabs are poured layer by layer after the internal bracing is completed. Once the entire structure is finished and the concrete strength meets design requirements, the bracing is removed. The basic principle for bracing replacement is "construct the structural floor slabs first, then remove the bracing." This traditional construction procedure presents the following three challenges:
[0004] 1. Dilemma of circulating materials
[0005] In the early stages of basement construction, the large floor area and integral pouring of the basement slabs necessitate a significant investment in formwork, scaffolding, and other temporary materials. Later in the construction phase, the complex structure and limited space of the super high-rise tower's basement make dismantling these materials extremely difficult, drastically increasing the operational complexity. The dismantling process not only consumes considerable time but also significantly increases labor and machinery costs, severely impacting project cost control and schedule planning. Particularly during the basement support replacement phase, the difficulty of dismantling these materials is further exacerbated. Because the supporting structure is intertwined with the main basement structure, precise operation is required during dismantling to avoid structural damage, undoubtedly increasing the complexity and risk of the demolition work.
[0006] 2. Construction obstacles in underground confined spaces
[0007] Underground spaces are enclosed and poorly ventilated, resulting in poor air circulation, dampness, and a long curing period for basement floor slabs, thus extending the construction cycle. Furthermore, the narrow space in underground areas hinders material transport due to limited access and open areas, affecting the scheduling of work processes and reducing construction efficiency. In the construction of multi-level basements in super high-rise towers, materials are transported multiple times, which is time-consuming and labor-intensive. Taking the construction of a super high-rise tower basement as an example, the transportation of building materials from the ground to the underground construction site often requires multiple transfers, each increasing time and labor costs and significantly slowing down the project progress. Simultaneously, the transportation of specialized materials and equipment required for support replacement within the confined space is even more difficult, further impacting construction efficiency and significantly reducing overall construction efficiency.
[0008] 3. Safety hazards related to lighting and ventilation
[0009] Underground enclosed spaces lack natural lighting and rely on artificial lighting, which can easily become insufficient if poorly maintained. Poor air circulation leads to the accumulation of harmful gases, increasing the risk of poisoning, fires, and other accidents. Furthermore, the enclosed construction areas for basement support replacement in super high-rise towers make it difficult for pollutants generated during construction to disperse, increasing safety hazards. Summary of the Invention
[0010] In view of this, in order to solve the above-mentioned problems in the construction of basements during the construction of super high-rise buildings, embodiments of the present invention provide an efficient deep foundation pit support replacement and super high-rise "post-tower construction" method.
[0011] Embodiments of the present invention provide an efficient method for deep foundation pit support replacement and super high-rise "post-tower construction" construction, comprising the following steps:
[0012] S1. Divide the basement construction area into a basement tower area and a basement non-tower area.
[0013] S2. Construct multi-story basement supports on the periphery of the basement area;
[0014] S3. Construct multiple basement floor slabs sequentially from bottom to top in the non-tower area of the basement. When constructing each basement floor slab, create openings in the basement tower area. After each basement floor slab is completed, remove the corresponding inner support of that basement floor slab and use the basement floor slab with the opening for replacement support.
[0015] S4. Construct multi-level basement floors in the basement tower area to seal the openings in the basement floors of each level in the non-tower area of the basement.
[0016] Furthermore, it also includes establishing a calculation model of the overall structure of the basement with openings in the non-tower area of the basement, inputting the soil pressure of the retaining structure according to the actual situation, analyzing and calculating the overall structure of the basement in the non-tower area of the basement based on the calculation model, and determining the construction design scheme of the basement "built after the tower".
[0017] Furthermore, when constructing multi-story basement slabs in the non-tower area of the basement, the basement tower area serves as a material storage and transportation site.
[0018] Furthermore, when constructing multi-story basement slabs in the non-tower area of the basement, the basement tower area serves as a site for arranging construction equipment.
[0019] Furthermore, the basement tower area is located in the central area of the basement non-tower area.
[0020] Furthermore, step S3 also includes setting inclined beams or floor slab haunches at the corners of openings in the basement floor slab in the non-tower area of the basement.
[0021] Furthermore, step S3 also includes reinforcing the perimeter frame beams adjacent to the opening outside the basement tower area as needed.
[0022] Furthermore, step S3 also includes reinforcing the floor slabs around the basement tower area as needed.
[0023] Furthermore, step S3 also includes reinforcing the frame columns outside the basement tower area as needed.
[0024] Furthermore, step S3 also includes reinforcing the shear walls outside the basement tower area as needed.
[0025] The beneficial effects of the technical solutions provided by the embodiments of the present invention are as follows:
[0026] 1. The present invention provides an efficient method for deep foundation pit support replacement and super high-rise “post-tower construction”, which divides the basement construction area into a basement tower area and a basement non-tower area. First, a basement floor slab with openings is constructed in the basement non-tower area, and the support in the basement is replaced using the floor slab. Then, a basement floor slab is constructed in the basement tower area to close the openings, that is, the basement floor slabs of each basement level are closed, thus realizing the support removal when the basement tower area is not closed.
[0027] 2. The present invention provides an efficient deep foundation pit replacement support and super high-rise “super tower post-construction” construction method, which constructs basement floor slabs with openings in the non-tower area of the basement, reducing the area of each basement floor slab pouring, and reducing the input of required formwork, scaffolding and other turnover materials as well as labor.
[0028] 4. The present invention provides an efficient deep foundation pit support replacement and super high-rise “super tower post-construction” construction method. When constructing basement floor slabs in the non-tower area of the basement, the basement tower area is used as the material storage and transportation site and the layout site for the construction equipment required for the pouring of basement floor slabs in the non-tower area. This avoids multiple transfers of building materials between the ground and the underground construction site, which can greatly improve the efficiency of construction organization and reduce the construction cycle of basement floor slab pouring in the non-tower area.
[0029] 5. The present invention provides an efficient deep foundation pit support replacement and super high-rise “post-tower construction” method, which constructs basement floor slabs with openings in the non-tower area of the basement. The openings can improve the ventilation performance under the basement floor slab, improve the lighting conditions, improve the good basement floor slab pouring environment, and shorten the solidification period of the basement floor slab during pouring; in addition, the openings can allow harmful gases in the basement to be discharged in time, avoid the accumulation of harmful gases, and reduce the safety hazards of basement support replacement construction. Attached Figure Description
[0030] Figure 1 This is a flowchart of an efficient deep foundation pit support replacement and super high-rise "post-tower construction" method according to the present invention;
[0031] Figure 2 This is a schematic diagram of the basement layout;
[0032] Figure 3 This is a schematic diagram of the support arrangement inside the basement;
[0033] Figure 4 This is a sectional view of the basement.
[0034] In the diagram: 1. Basement tower area; 2. Perimeter frame beams; 3. Perimeter frame columns; 4. Basement non-tower area; 5. Basement floor slab; 6. Basement internal supports; 7. Basement enclosure walls; 8. Inclined beams. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of the various possible embodiments of the present invention, intended to provide a basic understanding of the invention, but not intended to identify key or decisive elements of the invention or to limit the scope of protection sought.
[0036] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.
[0037] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.
[0038] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures. Also, it should be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale.
[0039] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0040] Please refer to Figure 1-4 The embodiments of the present invention provide an efficient method for deep foundation pit support replacement and super high-rise "post-tower construction" construction, including the following steps:
[0041] S1. Divide the basement construction area into basement tower area 1 and basement non-tower area 4.
[0042] S2. Construct a multi-story basement with internal support 6 on the periphery of the basement area.
[0043] S3. Construct multiple basement floor slabs from bottom to top in the non-tower area 4 of the basement. When constructing each basement floor slab, create an opening in the basement tower area 1. After each basement floor slab is completed, remove the corresponding inner support of that basement floor slab and use the basement floor slab with the opening for replacement support.
[0044] S4. Construct multi-level basement floors in basement tower area 1 to seal the openings in the basement floors of each level in basement non-tower area 4.
[0045] In actual super high-rise buildings, the super high-rise tower is generally built in the central area of the basement area, and the basement tower area 1 is located in the central area of the basement non-tower area 4. As in this embodiment, the basement area is quadrilateral, with basement enclosure walls 7 or external walls at the edges, and the basement area consists of the rectangular basement tower area 1 located in the center and the basement non-tower area 4 outside the basement tower area 1.
[0046] It should be noted that the basement internal support 6 in step S2 is completed according to the retaining structure design standards. Compared with the whole-floor pouring of basement floors, the feasibility of replacing the support for basement floor slabs with openings requires special verification. Therefore, the embodiment of the present invention provides an efficient deep foundation pit support replacement and super high-rise "super-tower post-construction" construction method, which also includes a calculation model of the overall structure of the basement with openings in the non-tower area 4 of the basement, and inputs the soil pressure of the retaining structure according to the actual situation. The overall structure of the basement in the non-tower area 4 of the basement is analyzed and calculated according to the calculation model. When analyzing and calculating the overall structure of the basement, the analysis is carried out from the perspectives of structural deformation and strength control, and the "super-tower post-construction" construction design scheme is determined in combination with the structural finite element calculation results.
[0047] In step S3, when constructing n basement floor slabs sequentially from bottom to top in the non-tower area 4 of the basement, n is generally an integer greater than or equal to 1. During the construction of each basement floor, the basement floor slab with openings is poured first. After the basement floor slab solidifies and reaches the design requirements for dismantling supports, the corresponding internal supports 6 above that basement floor slab are removed. For example, in this embodiment, if the basement has 5 floors, the 4th basement floor slab is constructed first above the basement floor slab 5. After the floor structure of the 4th basement floor slab reaches the design strength, the corresponding internal supports are removed. Then, the 3rd basement floor slab is constructed, and after the floor structure of the 3rd basement floor slab reaches the design strength, the corresponding internal supports are removed. This process is repeated layer by layer until all basement floor slabs in the non-tower area 4 are completed. During the layer-by-layer construction of the basement floor slabs in the non-tower area 4, deformation monitoring facilities can be pre-embedded as needed to monitor the stress and horizontal displacement of key areas.
[0048] When pouring the basement floor slab with openings in the non-tower area 4 of the basement, the tower area 1 of the basement is used as the material storage and transportation site and the site for the layout of construction equipment required for pouring the basement floor slab in the non-tower area 4 of the basement. This avoids multiple transfers of building materials between the ground and the underground construction site, which can greatly improve the efficiency of construction organization and reduce the construction cycle of pouring the basement floor slab in the non-tower area 4 of the basement.
[0049] When pouring basement floor slabs with openings in the non-tower area of the basement, the openings can improve the ventilation performance under the basement floor slab, improve lighting conditions, improve the good basement floor slab pouring environment, and shorten the solidification period of the basement floor slab during pouring; in addition, the openings can allow harmful gases in the basement to be discharged in time, avoid the accumulation of harmful gases, and reduce the safety hazards of basement dismantling and support construction operations.
[0050] In addition, when constructing the basement floor slab with openings in the non-tower area 4 of the basement, design and construction measures that meet the control requirements of structural strength, deformation, and cracking can be proposed based on the overall structural calculation model of the basement with openings in the non-tower area 4 of the basement. The beams, slabs, walls, columns, etc. can be designed and strengthened to alleviate the stress concentration phenomenon around the openings.
[0051] In some embodiments, based on the structural finite element calculation results, inclined beams 8 or floor slab haunches are installed at the corners of openings and uneven stress locations in the basement floor slab of the non-tower area 4 of the basement to ensure uniform stress distribution and avoid stress concentration. When the inclined beam 8 is a temporary inclined beam 8, it is removed when the basement floor slab of the basement tower area 1 is closed.
[0052] In some embodiments, based on the structural finite element analysis results, the portion of the basement floor slab adjacent to the opening in the non-tower area 4 of the basement is reinforced. For example, reinforcement is applied to the corners of the opening and the basement floor slab in the tension zone to ensure that floor slab cracking is controllable. The specific scope of the reinforcement design, excluding adjacent structures, should be determined based on the structural calculation results.
[0053] In some embodiments, based on the structural finite element analysis results, the perimeter frame beams 2 adjacent to the openings outside the basement tower area 1 are reinforced. Reinforcement methods include beam cross-section reinforcement, top reinforcement, bottom reinforcement, and web reinforcement; mechanical connections are recommended for longitudinal reinforcement. The specific scope of reinforcement design, excluding adjacent structures, should be determined based on the structural calculation results.
[0054] In some embodiments, the perimeter frame columns 3 adjacent to the opening, outside the basement tower area 1, are reinforced. The specific scope of the reinforcement design, excluding adjacent structures, should be determined based on the structural calculation results.
[0055] In some embodiments, the shear wall adjacent to the opening, outside the basement tower area 1, is reinforced. The specific scope of the reinforcement design, excluding adjacent structures, should be determined based on the structural calculation results.
[0056] In step S4, when constructing multi-level basement floor slabs in the basement tower area 1, construction proceeds layer by layer from bottom to top. Basement floor slabs are poured for each level in the basement tower area 1, specifically at the openings in the non-tower area 4 of the basement, thus sealing the openings in the non-tower area 4. After the next basement floor slab in the basement tower area 1 is poured and solidified to its design strength, the next floor slab is poured, and so on, layer by layer, until all basement floor slabs in the basement tower area 1 are completed, thus sealing each level of the basement sequentially.
[0057] It should be noted that the embodiments of the present invention provide an efficient deep foundation pit support replacement and super high-rise “super tower post-construction” construction method, which constructs basement floor slabs with openings in the non-tower area 4 of the basement. Compared with the whole floor of the basement being poured, the area of each basement floor slab being poured is reduced, which can effectively reduce the required formwork, scaffolding and other turnover materials, as well as the input of labor. It is especially suitable for basement construction with many basement floors, huge single basement area and narrow construction site.
[0058] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.
[0059] Where there is no conflict, the embodiments and features described above can be combined with each other. The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A highly efficient method for deep foundation pit support replacement and super high-rise "post-tower construction" construction, characterized in that, Includes the following steps: S1. Divide the basement construction area into a basement tower area and a basement non-tower area, wherein the basement tower area is located in the middle of the basement non-tower area; S2. Construct multi-story basement supports on the periphery of the basement area; S3. Construct multiple basement floor slabs sequentially from bottom to top in the non-tower area of the basement. When constructing each basement floor slab, create openings in the basement tower area. After each basement floor slab is completed, remove the corresponding inner support of that basement floor slab and use the basement floor slab with the opening for replacement support. When pouring basement floor slabs with openings in the non-tower area of the basement, the basement tower area shall be used as the material storage and transportation site and the site for the layout of construction equipment required for pouring basement floor slabs in the non-tower area of the basement. S4. Construct multi-level basement floors in the basement tower area to seal the openings in the basement floors of each level in the non-tower area of the basement.
2. The efficient deep foundation pit support replacement and super high-rise "super tower post-construction" construction method as described in claim 1, characterized in that: It also includes establishing a calculation model of the overall structure of the basement with openings in the non-tower area of the basement, inputting the soil pressure of the retaining structure according to the actual situation, analyzing and calculating the overall structure of the basement in the non-tower area of the basement based on the calculation model, and determining the construction design scheme of "building after the tower".
3. The efficient deep foundation pit support replacement and super high-rise "super tower post-construction" construction method as described in claim 1, characterized in that: Step S3 further includes installing inclined beams or floor slab armholes at the corners of openings in the basement floor slab in the non-tower area of the basement.
4. The efficient deep foundation pit support replacement and super high-rise "post-tower" construction method as described in claim 1, characterized in that: Step S3 also includes reinforcing the perimeter frame beams adjacent to the opening outside the basement tower area as needed.
5. The efficient deep foundation pit support replacement and super high-rise "post-tower" construction method as described in claim 1, characterized in that: Step S3 also includes reinforcing the floor slabs around the basement tower area as needed.
6. The efficient deep foundation pit support replacement and super high-rise "post-tower" construction method as described in claim 1, characterized in that: Step S3 also includes reinforcing the frame columns outside the basement tower area as needed.
7. The efficient deep foundation pit support replacement and super high-rise "post-tower" construction method as described in claim 1, characterized in that: Step S3 also includes reinforcing the shear walls outside the basement tower area as needed.