Construction method for applying prestress to assist structure translation of tall building

Abstract

The construction method for applying prestress to assist structure translation of the towering building is characterized in that a displacement system is composed of an underpinning bracket, a prestress rod, a bottom tray structure, a jack, a counter-force frame, a steel slide way and a steel rolling shaft, and bearing and jacking displacement of the towering building are achieved. Before displacement, a bottom tray structure is installed at the bottom of the building, underpinning brackets are installed at the 1 / 4 height position and the 1 / 8 height position of the building, prestress rods are installed between the underpinning brackets and the bottom tray structure, and prestress is applied to the prestress rods; the steel slideways are laid on the ground, the steel rollers are laid between the steel slideways and the bottom surface of the bottom tray structure, load sharing is achieved through the larger cross sectional area of the tray structure, the foundation stress is reduced, and the foundation treatment cost is reduced. The jack is started to push the bottom tray structure, the steel slide way provides support counterforce, and displacement of the building is achieved through rolling between the steel rolling shaft and the steel slide way.

Description

Technical Field

[0001] The invention relates to the technical field of building displacement, and in particular to a method for applying prestressed auxiliary structure translation to a high-rise building. Background Art

[0002] As the construction industry develops and usage plans continue to change, more and more buildings are located in locations or orientations that are no longer reasonable. It is usually too expensive and time-consuming to demolish and rebuild these buildings, or even irreparable buildings that cannot meet the needs of users. The need to relocate buildings as a whole is becoming more and more common.

[0003] A common building relocation solution is to cut off the building at a certain level, separate it from the foundation and turn it into a portable heavy object, pour concrete pallet beams on the level, with steel rollers under the pallet beams and tracks under the steel rollers, and then use traction equipment to move and fix it to the new foundation. Tall buildings have a high center of gravity, a small cross-sectional area at the bottom, and a large compressive stress at the bottom. Using traditional methods to translate tall buildings is prone to rollover and requires a high foundation bearing capacity for the soil under the track on the translation path. Summary of the invention

[0004] The core idea of ​​the present invention is to use the bottom tray structure to increase the bottom cross-sectional area of ​​the high-rise building, use prestressed rods to make the stress of the soil at the bottom of the steel slide more uniform, and use the steel slide to provide reaction force to push the building, so as to achieve the purpose of shifting the high-rise building.

[0005] To achieve the above-mentioned purpose, the present invention proposes a method for applying prestressed auxiliary structure translation to a high-rise building.

[0006] The invention discloses a method for applying prestressed auxiliary structure translation to a high-rise building, characterized in that a displacement system is formed by a support bracket, a prestressed rod, a bottom tray structure, a jack, a reaction frame, a steel slideway and a steel roller to realize the load-bearing and top-pushing displacement of the high-rise building. Before displacement, a bottom tray structure is installed at the bottom of the building, a support bracket is installed at one-quarter and one-eighth of the height of the building, a prestressed rod is installed between the support bracket and the bottom tray structure, and compressive prestress is applied to the prestressed rod; a steel slideway is laid on the ground, and steel rollers are laid between the steel slideway and the bottom surface of the bottom tray structure to cut off the high-rise building from the original foundation, and the gravity load of the high-rise building is converted from the original foundation to the transmission path of "upper load-bottom tray structure-steel roller-steel slideway-ground", so as to realize load sharing, reduce the base stress through the larger cross-sectional area of ​​the tray structure, and reduce the foundation treatment cost. The jack is started to push the bottom tray structure, and the steel slideway provides the support reaction force, and the displacement of the building is realized by the rolling between the steel roller and the steel slideway. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the overall arrangement of the components disclosed in the present invention.

[0008] Figure 2 It is a vertical stress distribution diagram of the soil at the bottom of the steel slideway before the prestressed rod of the present invention applies compressive prestress.

[0009] Figure 3 It is a vertical stress distribution diagram of the soil at the bottom of the steel slideway after the prestressed rod of the present invention applies compressive prestress. DETAILED DESCRIPTION

[0010] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described here are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] The present invention will be further described below in conjunction with the accompanying drawings. Figure 1 As shown, the present invention discloses a method for applying prestressed auxiliary structure translation to a high-rise building, which is characterized in that a displacement system is composed of a supporting bracket (2), a prestressed rod (3), a bottom tray structure (4), a jack (5), a reaction frame (6), a steel slideway (7) and a steel roller (8), so as to achieve the bearing and top-pushing displacement of the high-rise building.

[0012] The bottom tray structure (4) is characterized in that the minimum area of ​​the bottom tray structure (4) is calculated by the bearing capacity of the foundation, and the width / diameter of the bottom tray structure (4) needs to be greater than one-quarter of the height of the towering building (1).

[0013] The prestressed rod (3) needs to have a large lateral stiffness to avoid instability of the prestressed rod (3) after applying the compressive prestress. Figure 2 , after applying compressive prestress, the vertical stress distribution of the soil at the bottom of the steel slideway Figure 3 Applying compressive prestress can reduce the maximum vertical stress of the soil at the bottom of the steel slide, make the vertical stress distribution more uniform, and reduce the requirements for the bearing capacity of the soil.

[0014] A method for applying prestressed auxiliary structure translation to a high-rise building, comprising the following steps:

[0015] Step 1: Calculate the bearing capacity of the foundation, determine the size of the bottom tray structure (4), the number and arrangement of the steel rollers (8), and process the foundation as required;

[0016] Step 2: Install the bottom tray structure (4);

[0017] Step 3: Install the support bracket (2) at one quarter and one eighth of the height of the tall building (1), and install the prestressed rod (3) between the support bracket (2) and the bottom tray structure (4);

[0018] Step 4: applying compressive prestress to the prestressed rod (3);

[0019] Step 5: Lay a steel slideway (7) on the ground, and lay steel rollers (8) between the steel slideway (7) and the bottom tray structure (4);

[0020] Step 5: Fix a plurality of reaction frames (6) on the steel slideway (7), and install a jack (5) between the reaction frames (6) and the bottom tray structure (4);

[0021] Step 6: Cut off the high-rise building (1) from the original foundation, and the gravity load of the high-rise building (1) is converted from the original foundation to the bottom tray structure (4) - steel roller (8) - steel slideway (7) - ground;

[0022] Step 7: Start the jack (5) to push the bottom tray structure (4), and the steel slideway (7) provides a support reaction force, and the displacement of the building is achieved through the rolling between the steel roller (8) and the steel slideway (7);

[0023] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The present invention discloses a method for applying prestressed auxiliary structure translation to a high-rise building, which is characterized by: The displacement system is composed of a supporting bracket (2), a prestressed rod (3), a bottom tray structure (4), a jack (5), a reaction frame (6), a steel slideway (7) and a steel roller (8), thereby achieving the bearing and top-pushing displacement of a high-rise building.

2. The bottom tray structure (4) according to claim 1, characterized in that: The minimum area of ​​the bottom tray structure (4) is calculated by the bearing capacity of the foundation, and the width / diameter of the bottom tray structure (4) must be greater than one-quarter of the height of the towering building (1).

3. The prestressed rod (3) as described in claim 1 needs to have a large lateral stiffness to avoid instability of the prestressed rod (3) after the compressive prestress is applied.

4. A method for applying prestressed auxiliary structure translation to a high-rise building as claimed in claim 1, comprising the following steps: Step 1: Calculate the bearing capacity of the foundation, determine the size of the bottom tray structure (4), the number and arrangement of the steel rollers (8), and process the foundation as required; Step 2: Install the bottom tray structure (4); Step 3: Install the underpinning brackets (2) at one quarter and one eighth of the height of the tall building (1), and install the prestressed rods (3) between the underpinning brackets (2) and the bottom tray structure (4); Step 4: applying compressive prestress to the prestressed rod (3); Step 5: Lay a steel slideway (7) on the ground, and lay steel rollers (8) between the steel slideway (7) and the bottom tray structure (4); Step 5: Fix a plurality of reaction frames (6) on the steel slideway (7), and install a jack (5) between the reaction frames (6) and the bottom tray structure (4); Step 6: Cut off the high-rise building (1) from the original foundation, and the gravity load of the high-rise building (1) is converted from the original foundation to the bottom tray structure (4) - steel roller (8) - steel slideway (7) - ground; Step 7: Start the jack (5) to push the bottom tray structure (4), and the steel slideway (7) provides a support reaction force, and the displacement of the building is achieved through the rolling between the steel roller (8) and the steel slideway (7).

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