Newly-added elevator pit structure of existing building
By installing an elevator pit structure with reinforced concrete side walls and floor in the basement and using elastic materials to transfer the load, the problem of the impact of elevator loads on existing buildings was solved, efficient and reliable elevator additions were achieved, and reinforcement costs were reduced.
Patent Information
- Application Number
- CN202520073456.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2035-01-13
AI Technical Summary
When adding elevators with existing technology, the elevator load has a significant impact on the existing building structure, especially the impact load of the elevator pit, which can easily cause safety accidents. In addition, traditional methods require significant reinforcement of the beams around the shaft, affecting the existing building structure.
An elevator pit structure is set up in the basement of an existing building. The side walls and bottom plate are made of reinforced concrete. The bottom plate is supported by the side walls. The gap between the side walls and the basement top plate is filled with elastic material. The load is transferred to the foundation through the elastic material, reducing the vibration impact on the main structure.
Effectively reduce the impact of the elevator bottom impact load on the main structure, reduce reinforcement workload, improve reliability and economic benefits, and reduce disturbance to existing buildings.
Smart Images
Figure CN223358787U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an elevator pit structure, in particular to an elevator pit structure newly added to an existing building. Background Art
[0002] With the development of social economy, we have entered the era of urban renewal.
[0003] As demand for building functionality continues to increase, the renovation and upgrading of existing buildings has garnered widespread attention. This is particularly true for older, multi-story buildings designed and constructed over many years, often without elevators. With the advent of an aging society and increasing public demand for building comfort, the addition of elevators has become a crucial component of building renovation and upgrading. Elevators carry significant loads, significantly impacting existing building structures. This is particularly true for elevator pits, where impact loads and other factors can significantly impact building structures and must be handled with caution, as they can lead to serious safety incidents.
[0004] In response to the above situation, engineering and technical personnel have developed many methods to optimize the new pit structure of existing elevators and reduce its impact on existing buildings. Each method has its own characteristics and scope of application, and all need to be optimized based on the characteristics of the building where the elevator is to be added. Utility Model Content
[0005] In order to solve the technical problems existing in the known technology, the utility model provides a new elevator pit structure for an existing building, which can achieve the purpose of adding an elevator with as little disturbance to the existing structure as possible, and has high reliability, high efficiency and low cost.
[0006] The utility model adopts a technical solution to solve the technical problems existing in the known technology: a new elevator pit structure is added to an existing building, that is, a new elevator pit structure is set in the basement of the existing building, the elevator pit structure is composed of side walls and a bottom plate, the lower end of the side wall is supported by the basement foundation, the top end and the bottom of the beam around the elevator shaft at the top of the basement leave a gap filled with elastic material, and the bottom plate is supported by the side wall.
[0007] The side wall material is reinforced concrete.
[0008] The base plate material is reinforced concrete.
[0009] The gap between the top of the side wall and the bottom of the beam around the elevator shaft at the top of the basement is ≥5cm and not less than the deflection of the beam, and the gap filling material is an elastic deformable material.
[0010] The gap filling material can prevent load transfer between the beams surrounding the basement roof shaft and the top of the side walls.
[0011] The side wall is connected to the basement foundation by planting reinforcement.
[0012] The advantages and positive effects of the present invention are as follows: through the pit structure set up in the basement space, the impact load of the elevator bottom is directly transferred to the existing building foundation, which greatly reduces the impact load of the elevator bottom on the vibration of the main structure, and there is no load transfer between the pit side walls and the basement roof shaft peripheral beams, so the reinforcement amount of the elevator shaft peripheral beams is greatly reduced, and even when the weight of the concrete removed from the basement roof for shaft opening is equal to the weight of the newly added partition walls, it is not necessary to reinforce the existing beams around the shaft, thereby achieving greater social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic cross-sectional view of the basement top plate of the present invention;
[0014] Figure 2 It is a schematic cross-sectional view of the middle of the basement floor height of the present invention.
[0015] Figure 3 It is a side schematic diagram of the utility model.
[0016] In the figure: 1. Existing frame columns, 2. Existing or newly added beams around the basement ceiling and elevator car, 3. Elevator car, 4. Existing floor slab; 5. Elevator pit side walls, 6. Elevator pit floor, 7. Elastic filling material, 8. Existing building foundation. DETAILED DESCRIPTION
[0017] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:
[0018] See also Figure 1-3 A new elevator pit structure is added to an existing building. An elevator opening is opened on the basement roof 4 of the existing building. The size of the opening is determined according to the size of the elevator car 3. Existing or newly added beams 2 of the basement roof are arranged around the elevator car 3 to enclose the opening of the elevator car 3. The existing or newly added beams 2 of the basement roof transfer the basement roof load through the existing frame columns 1 to the existing building foundation 8.
[0019] In the basement, an elevator pit side wall 5 is set up and connected to the existing building foundation 8 by planting steel bars. The elevator pit floor 6 is supported on the pit side wall 5. A gap is set between the top of the elevator pit side wall and the bottom of the beam 4 around the elevator shaft above it, which is filled with elastic filling material 7. The gap is not less than 5 cm and not less than the deflection of the beam 4. No load transfer occurs between the beam 4 and the side wall 5, so that the impact load at the bottom of the elevator and most of the weight are directly transferred from the pit structure to the foundation.
[0020] This method achieves the goal of transferring the elevator's impact load and the majority of its weight directly from the elevator pit structure to the foundation. Compared to the commonly used method of suspending the elevator pit below the surrounding beams of the basement ceiling shaft, this method provides more direct force transmission and more reliable performance. It significantly reduces the disturbance to the existing building caused by the impact load of the new elevator and the reinforcement workload surrounding the basement ceiling shaft. This method provides a reference for upgrading and retrofitting existing buildings with new elevators, with significant social and economic benefits.
[0021] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.
Claims
1. A new elevator pit structure for an existing building, characterized in that A new elevator pit structure is set up in the basement of an existing building. The elevator pit structure consists of side walls and a bottom plate. The lower end of the side wall is supported on the basement foundation. There is a gap between the top and the bottom of the beam surrounding the elevator shaft at the top of the basement, which is filled with elastic material. The bottom plate is supported on the side wall.
2. The elevator pit structure for an existing building according to claim 1, characterized in that: The side wall material is reinforced concrete.
3. The elevator pit structure for an existing building according to claim 1, characterized in that: The base plate material is reinforced concrete.
4. The elevator pit structure for an existing building according to claim 1, characterized in that: The gap between the top of the side wall and the bottom of the beam around the elevator shaft at the top of the basement is ≥5cm and not less than the deflection of the beam, and the gap filling material is an elastic deformable material.
5. The elevator pit structure for an existing building according to claim 2, characterized in that: The side wall is connected to the basement foundation by planting reinforcement.
6. The elevator pit structure for an existing building according to claim 4, characterized in that: The gap filling material can prevent load transfer between the basement ceiling elevator shaft peripheral beams and the top of the side walls.