Overhanging type elevator foundation
The cantilevered elevator foundation uses cantilevered I-beams and steel wire ropes to form the load-bearing part, combined with a reinforcement mechanism, which solves the safety hazards caused by elevator foundation settlement, achieves stable construction, and is suitable for complex soil environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2026-03-20
AI Technical Summary
In soft soil environments, construction elevator foundations are prone to sinking, leading to safety hazards that are difficult to effectively address with existing technologies.
The elevator foundation adopts a cantilevered design, with the load-bearing part consisting of cantilevered I-beams and steel wire ropes, combined with a reinforcing mechanism including U-shaped anchor bolts, cover plates, thin steel plates and steel bars, installed above the basement floor slab. The cantilevered part is equipped with double I-beams and steel plates, which are connected by steel wire ropes to form a stable foundation structure.
It fundamentally solves the problem of elevator foundation subsidence, eliminates safety hazards, has a simple structure, is easy to operate and construct, and is suitable for diverse building environments.
Smart Images
Figure CN224016360U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of building construction, and in particular to a cantilevered elevator foundation. Background Technology
[0002] In recent years, with the diversification of building environments, the installation, use, and setup of elevators have become increasingly complex. As the foundation of construction elevators and the guarantee of overall stability, the installation of elevator foundations has also become more complex due to the diverse environments. During construction, projects often face tight schedules, deep excavations, and early backfilling of foundation pits. Construction elevators are typically placed on backfill soil; however, this construction method is not suitable for some environments with extremely poor soil conditions.
[0003] Our approach to the construction elevator foundation for the high-rise building includes one basement level and 20 above-ground levels. The basement floor height is 5.1m, the first and second floors are 5.95m / 6m high, the standard floor height is 3.8m, and the building height is 81.65m. A frame + core tube structure is adopted. Given the coastal sedimentary landform and relatively flat terrain, the soil layers involved in the foundation pit excavation are mainly plain fill, clay, and silt. Most of the soil within the excavation depth is soft soil with high compressibility and poor engineering properties. If the construction elevator is directly built on top, it is easy to cause settlement problems. Utility Model Content
[0004] The purpose of this utility model is to fundamentally solve the problem of construction elevator construction being affected by foundation settlement, thereby addressing the safety hazards that may be caused by elevator foundation settlement as mentioned in the background art.
[0005] This utility model provides a cantilevered elevator foundation, which adopts the following technical solution:
[0006] A cantilevered elevator foundation includes a cantilevered I-beam and steel wire ropes forming the load-bearing part of the foundation. A portion of the cantilevered I-beam is installed above the basement floor slab via a reinforcing mechanism. The reinforcing mechanism comprises U-shaped anchor bolts, a cover plate, a thin steel plate, and reinforcing bars. Multiple U-shaped anchor bolts are arranged parallel to the outer edge of the building's structural wall. A longitudinal connecting beam is laid on the cantilevered portion of the cantilevered I-beam. Double-section I-beams are provided at the bottom of the cantilevered portion of the cantilevered I-beam. Columns are provided on both sides of the middle portion of the cantilevered I-beam. Steel plates are circumferentially arranged on the columns, and I-beams are mounted on the steel plates. The double-section I-beams and the I-beams are connected by steel wire ropes.
[0007] Preferably, the U-shaped anchor bolt is wedged tightly to the cantilevered I-beam using a hardwood wedge.
[0008] Preferably, the bottom of the U-shaped anchor bolt is welded to a thin steel plate, the top of which passes through a cover plate and a nut, and a reinforcing bar is embedded inside the U-shaped anchor bolt.
[0009] Preferably, the steel plates are connected by butt welds, and the steel plates are anchored into the column by anchor rods.
[0010] Preferably, the double-I-beams are arranged vertically.
[0011] Preferably, all the I-beams are rigidly connected.
[0012] Preferably, the cantilevered I-beam is provided with a platform plate.
[0013] Preferably, the platform is equipped with a construction elevator.
[0014] In summary, this utility model has the following beneficial technical effects:
[0015] The cantilevered I-beam has double-sectioned I-beams at its bottom, with columns on both sides of the middle section. Steel plates are circumferentially mounted on these columns, and I-beams are mounted on the plates. The double-sectioned I-beams and the I-beams are connected by steel wire ropes, using the cantilevered I-beam as the foundation's load-bearing support. The cantilevered I-beam and steel wire ropes form the load-bearing part of the elevator foundation. The construction elevator foundation is then built upon this foundation using conventional reinforced concrete construction techniques. This method fundamentally solves the problem of construction elevator construction being affected by foundation settlement, and also eliminates potential safety hazards caused by foundation settlement. It features a simple structure, convenient operation, easy construction, and flexible use, making it easy to promote. Attached Figure Description
[0016] Figure 1 This is a cross-sectional structural diagram of the cantilevered elevator foundation of this utility model;
[0017] Figure 2 This is a top view of the cantilevered elevator foundation of this utility model.
[0018] Figure 3 This is a schematic diagram of the reinforcing mechanism of the cantilevered elevator foundation of this utility model;
[0019] Figure 4 This is a schematic diagram of the structure at point A of the cantilevered elevator foundation of this utility model;
[0020] Figure 5 This is a schematic diagram of the steel plate structure of the cantilevered elevator foundation of this utility model.
[0021] Explanation of reference numerals in the attached drawings: 1. Cantilevered I-beam; 2. Reinforcing mechanism; 201. U-shaped anchor bolt; 202. Cover plate; 203. Cover plate; 204. Reinforcing bar; 205. Nut; 206. Wooden wedge; 3. Basement floor slab; 4. Exterior wall of building structure; 5. Connecting beam; 6. Double-jointed I-beam; 7. Column; 8. Steel plate; 9. I-beam; 10. Steel wire rope; 11. Platform plate. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Example
[0024] Please see Figures 1 to 5 This utility model discloses a cantilevered elevator foundation, comprising a cantilevered I-beam and steel wire rope forming the load-bearing part of the elevator foundation. Part of the structure of the cantilevered I-beam 1 is installed above the basement floor slab 3 through a reinforcing mechanism 2. The reinforcing mechanism 2 consists of U-shaped anchor bolts 201, cover plates 202, thin steel plates 203, and reinforcing bars 204. Multiple U-shaped anchor bolts 201 are arranged parallel to the outer edge 4 of the building structure wall. A connecting beam 5 is laid longitudinally on the cantilevered part of the cantilevered I-beam 1. A double-jointed I-beam 6 is provided at the bottom of the cantilevered part of the cantilevered I-beam 1. Columns 7 are provided on both sides of the middle part of the cantilevered I-beam 1. Steel plates 8 are arranged around the columns 7. I-beams 9 are provided on the steel plates 8. The double-jointed I-beams 6 and I-beams 9 are connected by steel wire ropes 10.
[0025] In this embodiment, U-shaped anchor bolts 201 are welded onto thin steel plates 203, and two 1.5m long, 18mm diameter reinforcing bars 204 are embedded under the U-shaped anchor bolts 201. The top of the U-shaped anchor bolts 201 passes through the cover plate 203 and the nut 205, and the reinforcing bars 204 are embedded inside the U-shaped anchor bolts 201. The U-shaped anchor bolts 201 and the cantilevered I-beam 1 are wedged together with hardwood wedges 206. Before binding the reinforcing bars of the cantilever layer, the center line of the cantilever beam is first laid out on the formwork according to the designed step distance. Then, the U-shaped anchor bolts 201 are fixed to the formwork with nails to ensure that the center line of the cantilever beam coincides with the line connecting the midpoints of the U-shaped anchor bolts 201. The threaded part of the bolts is wrapped with warning tape to prevent pollution during construction and damage during reinforcing bar binding and concrete pouring. The first U-shaped anchor bolt (201) is 2110mm from the outer edge of the building structure, the second is 2000mm from the end of the H-beam, and the third is 1600mm from the end of the H-beam. If there are upward-turning beams or shear walls around the main structure affecting the bolt embedding, the first anchor point can be set further in according to the site conditions, but the anchoring length must be guaranteed. The double-section H-beam is arranged vertically and is formed by welding the upper and lower flanges of two 18# H-beams. The weld is a fillet weld, and stiffeners are added at the welding position. The dimensions of the processed double-section H-beam are 360*94*6.5*10.7. The stiffeners are 160*8. A steel plate surrounds the column, and the steel plates are connected by butt welds. The steel plate is anchored into the column by anchor rods. The steel plate is 22mm thick, and the anchor rod insertion depth shall not be less than 80mm.
[0026] The construction process of this utility model includes: erection of the basement roof formwork support → pre-embedding of U-shaped anchor bolts → binding of the reinforcement bars of the basement roof beams → concrete pouring → surveying and setting out → installation of the cantilevered I-beam main beam. After the cantilever layer concrete is poured, the center line of the cantilever beam is set out, and the I-beams are laid. The entry and exit positions are corrected, and then they are fixed by welding. The cantilever and load-bearing parts use double-channel steel. After the cantilever beam is fixed, in areas where connecting beams need to be erected, connecting beams are laid on it along the longitudinal direction of the frame. All I-beams are rigidly connected.
[0027] After the cantilevered I-beams are erected, the foundation beam reinforcement is tied. The beam reinforcement uses straight threaded sleeves for connection, while the slab reinforcement uses lap splices. The lap length is based on non-seismic considerations, and all intersections of the reinforcement are tied. Concrete pouring begins with the beams, followed by the slab, progressing from one side of the beam to the other. When pouring to the bottom of the slab, it is poured together with the slab. After concrete pouring, it is promptly covered with plastic film for curing, with a curing time of no less than 14 days. During the use of the construction elevator, displacement and deformation of the steel beams should be monitored. If the displacement at any point exceeds 26mm or the deformation is excessive, the construction elevator should be stopped immediately. The first section of the construction elevator's wall-mounted frame should be as close as possible to the bottom of the guide rail frame.
[0028] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.
Claims
1. A cantilevered elevator foundation, characterized in that, The elevator foundation is supported by cantilevered I-beams (1) and steel wire ropes (10); the cantilevered I-beams (1) are arranged side by side and installed above the basement floor slab (3) by a reinforcing mechanism (2); the reinforcing mechanism (2) consists of U-shaped anchor bolts (201), cover plates (202), thin steel plates (203) and reinforcing bars (204); the U-shaped anchor bolts (201) are arranged in multiple parallel rows from the outer edge (4) of the building structure wall; the cantilevered part of the cantilevered I-beams (1) is longitudinally laid with connecting beams (5); the bottom of the cantilevered part of the cantilevered I-beams (1) is provided with double-jointed I-beams (6); the two sides of the middle part of the cantilevered I-beams (1) are provided with columns (7); the columns (7) are circumferentially provided with steel plates (8); the steel plates (8) are provided with I-beams (9); the double-jointed I-beams (6) and the I-beams (9) are connected by steel wire ropes (10).
2. The cantilevered elevator foundation according to claim 1, characterized in that, The bottom of the U-shaped anchor bolt (201) is welded to a thin steel plate (203), and the top passes through a cover plate (202) and a nut (205). The U-shaped anchor bolt (201) has an embedded steel bar (204).
3. The cantilevered elevator foundation according to claim 1, characterized in that, The U-shaped anchor bolt (201) is wedged tightly to the cantilevered I-beam (1) by a hardwood wedge.
4. The cantilevered elevator foundation according to claim 1, characterized in that, The steel plates (8) are connected by butt welds, and the steel plates (8) are anchored into the column (7) by anchor rods.
5. The cantilevered elevator foundation according to claim 1, characterized in that, The double-I-beam (6) is arranged vertically.
6. The cantilevered elevator foundation according to claim 1, characterized in that, All the I-beams (9) are rigidly connected.
7. The cantilevered elevator foundation according to claim 1, characterized in that, A platform plate (11) is provided on the cantilevered I-beam (1).
8. The cantilevered elevator foundation according to claim 7, characterized in that, The platform plate (11) is equipped with a construction elevator.