Construction method of construction elevator foundation based on basement foundation bottom plate sinking

Abstract

This invention relates to the field of construction elevator foundation construction technology, aiming to solve the problems of material waste caused by existing technologies that separately set the construction elevator foundation on the basement roof slab or set it on the basement floor slab through the roof slab. This invention provides a construction elevator foundation construction method based on the settlement of the basement foundation slab, including the following steps: Step 1: Determine the installation point of the construction elevator; Step 2: Settle the basement foundation slab at the selected installation point, construct a cushion layer on the base layer, and then construct a waterproof structural layer on the surface of the cushion layer; Step 3: Tie the reinforcement of the basement foundation slab; Step 4: Pre-embed drainage pipes; Step 5: Pour concrete for the basement foundation slab, using the basement foundation slab in the settlement space as the construction elevator foundation; Step 6: Install and inspect the construction elevator; Step 7: Dismantle the construction elevator; Step 8: Backfill the settlement pit formed between the construction elevator foundation and the basement foundation slab outside the settlement space.

Description

Technical Field

[0001] This invention relates to the field of construction elevator foundation construction technology, and more specifically, to a construction elevator foundation construction method based on the settlement of the basement foundation slab. Background Technology

[0002] In modern construction projects, construction elevators are the core equipment for vertical transportation on site, playing a vital role in material transfer, personnel movement, and other operational processes. In actual construction, the use, operation, maintenance, and related work of construction elevators have received more attention from all parties involved in the project.

[0003] Currently, the technology for installing construction elevators on the basement roof slab or basement foundation slab is relatively mature. The conventional practice is to directly pour the construction elevator foundation on the basement roof slab or through the roof slab onto the foundation slab, and then fix the construction elevator foundation to the roof slab or foundation slab. However, this installation process has the following drawbacks: ① Installing construction elevators directly on the basement roof: This method requires the construction of protective passageways, increasing construction costs. During the mid-to-late stages of construction, when decoration and finishing work and overall site construction are underway, multiple tasks are conducted concurrently. Installing elevators on the basement roof will occupy the rooftop construction work surface, disrupt on-site transportation channels, and cause inconvenience in material handling. It is highly likely that the construction passageways required for transporting materials to upper floors will affect the overall site construction, causing inconvenience to construction organization.

[0004] ② Construction elevator installed directly on the foundation slab through the basement roof slab: After the construction elevator is installed through the basement roof slab, rainwater cannot be effectively collected and discharged in an organized manner on rainy days. The rainwater will spread to the basement and pose a risk, affecting the normal construction work in the basement.

[0005] ③ Both of the above methods exist: because the construction elevator foundation has a certain thickness and the bottom of the elevator car needs a certain space, the combination of the two causes the car floor to be much higher than the external top or bottom plate elevation, and a ramp needs to be set up to enter and exit the elevator car; this extra climbing operation not only increases the physical burden on workers, but also slows down the material turnover speed, which has an adverse effect on construction efficiency. Summary of the Invention

[0006] This invention aims to provide a construction method for construction elevator foundations based on the settlement of the basement foundation slab, in order to solve the problems of existing technologies that place the construction elevator foundation separately on the basement roof slab or place it through the roof slab on the foundation slab, resulting in waste of construction materials for the construction elevator foundation and protective shed, as well as the problems of the construction elevator being placed on the roof slab affecting the efficiency of material transfer on site, and the construction elevator being placed through the roof slab on the foundation slab resulting in the ineffective collection and organized discharge of rainwater.

[0007] This invention is achieved using the following technical solution: This invention provides a construction method for a construction elevator foundation based on the settlement of the basement foundation slab, comprising the following steps: Step 1: Layout planning before construction, determine the installation location of the construction elevator on the basement foundation slab; Step 2: The basement foundation slab at the installation point selected in Step 1 is settled, and a cushion layer is constructed on the settled base. Then, a waterproof structural layer is constructed on the surface of the cushion layer. Step 3: Tie the reinforcement bars for the basement foundation slab; Step 4: Pre-install drainage pipes; Step 5: Pour the concrete for the basement foundation slab, using the basement foundation slab in the sunken space as the foundation for the construction elevator. Step 6: Install and inspect the construction elevator; Step 7: After the construction elevator has been used, dismantle the construction elevator. Step 8: Backfill the sinkhole formed between the construction elevator foundation and the basement foundation slab outside the sinkhole.

[0008] As a preferred technical solution: Step 1 specifically includes: Based on the overall construction plan and the basement construction schedule, the maximum daily operating load and operating range of the construction elevator were calculated, and the installation point of the construction elevator was selected on the basement foundation slab. Calculate the bearing capacity of the basement foundation slab at this location to determine whether the basement foundation slab at this location can meet the long-term operating load requirements of the construction elevator. If it does not meet the requirements, then the basement foundation slab at this location should be reinforced.

[0009] As a preferred technical solution: Step 2 specifically includes: Based on the installation point selected in step 1, the basement foundation slab at that location is excavated to form a foundation pit; A concrete cushion layer is poured on the basement foundation slab after the basement has sunk. The concrete cushion layer is poured and sunk according to the shape of the foundation pit, forming a sunken space at this location. Then, a waterproof structural layer is constructed on the surface of the concrete cushion layer.

[0010] As a preferred technical solution: Step 3 specifically includes: Above the waterproof structural layer in step 2, the basement foundation slab reinforcement is tied. The basement foundation slab reinforcement covers the entire waterproof structural layer area and extends outward. The basement foundation slab reinforcement located in the sunken space serves as the construction elevator foundation reinforcement.

[0011] As a preferred technical solution: The reinforcement specifications for the construction elevator foundation steel bars in the sunken space shall be based on the higher reinforcement requirement of the two working conditions: the basement foundation slab reinforcement and the elevator foundation reinforcement.

[0012] As a preferred technical solution: Step 4 specifically includes: Based on the basement drawings and the outline of the construction elevator base, a drainage pipe is pre-embedded on one side of the sunken space formed in step 2, and the drainage slope of the drainage pipe is designed. The water collection end of the drainage pipe is located at the top elevation of the construction elevator foundation, and the drainage end of the drainage pipe is connected to the water collection pit.

[0013] As a preferred technical solution: Step 5 specifically includes: Anchor bolts for the construction elevator are pre-embedded in the sunken space, and the basement foundation slab concrete is poured above the waterproof structural layer. The basement foundation slab concrete inside and outside the sunken space is poured in layers simultaneously to form a whole sunken basement foundation slab. The basement foundation slab inside the sunken space is used as the foundation for the construction elevator. The top surface elevation of the construction elevator foundation is lower than the top surface elevation of the basement foundation slab outside the sunken space. A sunken pit for the installation of the construction elevator is formed between the construction elevator foundation and the basement foundation slab outside the sunken space.

[0014] As a preferred technical solution: Step 6 specifically includes: Hoist the construction elevator base to the designated installation position on the construction elevator foundation, level it, and fix it with the construction elevator anchor bolts. The construction elevator standard section splicing, wall-mounted component installation, car assembly, and electrical wiring and safety protection device layout were completed sequentially. The elevator car flap should be flush with the basement foundation slab. After the construction elevator is assembled, it is inspected and accepted.

[0015] As a preferred technical solution: Step 7 specifically includes: After the main structure, secondary structure and decoration works on the ground are completed and the construction elevator is no longer in use, the power supply system of the construction elevator is cut off and the electrical supporting equipment is removed; the car, wall-mounted frame, standard section and construction elevator base are dismantled in sequence from top to bottom.

[0016] As a preferred technical solution: Step 8 specifically includes: Clean up the sunken foundation pit and fill the inside of the drainage pipe with mortar to seal it; Then, concrete was backfilled into the sinkhole.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: Compared to traditional methods, this invention features a partial sinking design for the basement foundation slab. The concrete basement foundation slab formed within the sinking space serves as the foundation for the construction elevator, avoiding the need for secondary pouring of the elevator foundation. This results in better overall integrity of the basement foundation slab and higher construction efficiency. Furthermore, by leveraging the high load-bearing capacity and strong structural stability of the foundation slab, the load of the construction elevator is directly borne by the foundation. This not only ensures good installation stability for the construction elevator but also eliminates the need to pour a separate construction elevator foundation on the basement roof slab or basement foundation slab, thus avoiding the waste of labor and materials caused by the need to remove the foundation after the construction elevator is dismantled. Meanwhile, since this invention directly uses the basement foundation slab as the foundation for the construction elevator, it no longer occupies the working surface of the basement roof slab. This not only frees up all the working space of the basement roof slab and opens up the vertical transportation channel between the basement and the above-ground floors, but also enables efficient transfer of personnel, materials, and machinery, completely solving the problems of traffic congestion and limited transportation routes on site, and improving the efficiency of material transfer on site. This invention independently sets up the construction elevator in the basement foundation slab area, allowing the transportation of materials above ground to be transferred to the upper floors via the basement. This avoids the accumulation of reusable materials on the basement roof slab, which would affect all construction processes on the roof slab and outdoor landscaping work, maximizing overall construction efficiency, ensuring the orderly progress of indoor and outdoor processes, and improving the overall construction efficiency of the project. Moreover, there is no need to build a protective canopy on the roof slab, avoiding waste of labor and materials. This invention uses the sunken part of the basement foundation slab as the foundation of the construction elevator, so that the elevator car flap is flush with the top surface of the basement foundation slab outside the sunken space. Material transportation can be carried in without the need to build a ramp platform, which reduces the physical exertion of workers, makes it easier for materials to enter and exit the car, and improves the efficiency of material transportation. This invention embeds a drainage pipe in the basement foundation slab on one side of the sunken space, and sets the water collection end of the drainage pipe at the elevation of the top surface of the construction elevator foundation. A drainage slope is preset on the top surface of the construction elevator foundation facing the water collection end of the drainage pipe, and a drainage slope is preset on the basement foundation slab around the construction elevator foundation towards the sunken pit. Rainwater and construction water falling from the top slab opening are systematically drained into the sunken pit, and then drained to an adjacent sump through the drainage pipe. This prevents water accumulation in the sunken pit, avoids soaking the construction elevator base and foundation, and prevents water from spreading to other construction areas in the basement, thus affecting normal construction operations. Attached Figure Description

[0018] Figure 1 This is a flowchart of the construction method for construction elevator foundations based on the settlement of the basement foundation slab, as described in this invention.

[0019] Figure 2 This is a cross-sectional view of the sinkhole described in this invention.

[0020] Figure 3 This is a side view of the construction elevator foundation described in this invention.

[0021] Figure 4 This is a structural schematic diagram of the construction elevator anchor bolts described in this invention.

[0022] Icons: 1-Concrete foundation, 2-Drainage pipe, 3-Sump, 4-Basement foundation slab reinforcement, 5-Construction elevator foundation reinforcement, 6-Construction elevator, 7-Basement foundation slab, 8-Construction elevator foundation, 9-Construction elevator anchor bolts, 10-Waterproof sleeve, 11-Construction elevator car flap. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1 like Figures 1-3 As shown in the figure, this embodiment proposes a construction method for a construction elevator foundation based on the settlement of the basement foundation slab, including the following steps: Step 1: Layout planning before construction, determine the installation point of construction elevator 6 on the basement foundation slab 7; Based on the overall construction plan and the basement construction schedule, the maximum daily operating load and operating range of the construction elevator 6 were calculated, and the installation point of the construction elevator 6 was selected on the basement foundation slab 7. Based on the reinforcement and concrete strength of the base slab structure at this location, and in conjunction with the soil load, the bearing capacity of the base slab is calculated to determine whether the basement foundation slab 7 at this location can meet the long-term operating load requirements of the construction elevator 6. If it does not meet the requirements, the basement foundation slab 7 at this location will be reinforced to avoid the risk of structural damage to the basement foundation slab 7.

[0025] Step 2: The basement foundation slab 7 at the installation point selected in Step 1 is settled, and a cushion layer is constructed on the settled base layer. Then, a waterproof structural layer is constructed on the surface of the cushion layer. Based on the installation point selected in step 1, the basement foundation slab 7 base layer at that location is excavated to form a foundation pit; A concrete cushion layer 1 is poured on the base slab 7 of the basement after it has sunk. The concrete cushion layer 1 is poured and sunk according to the shape of the foundation pit, forming a sunken space at this location. Then, a waterproof structural layer is constructed on the surface of the concrete cushion layer 1. The waterproof structural layer can be formed by laying waterproof membrane.

[0026] Step 3: Tie the reinforcement bars of the basement foundation slab 4; Above the waterproof structural layer in step 2, the basement foundation slab reinforcement 4 is tied. The basement foundation slab reinforcement 4 covers the entire area above the waterproof structural layer and extends outward. The extension length meets the specification requirements. The basement foundation slab reinforcement 4 located in the sunken space serves as the construction elevator foundation reinforcement 5 and the basement foundation slab reinforcement 4 serves as the overall load-bearing structure.

[0027] Among them, the reinforcement specifications of the construction elevator foundation steel bar 5 in the sunken space shall be based on the higher reinforcement requirement of the two working conditions: the basement foundation slab reinforcement and the elevator foundation reinforcement.

[0028] When pouring the concrete for the basement foundation slab 7, the concrete inside and outside the sunken space is poured in layers simultaneously to form the sunken basement foundation slab 7. The basement foundation slab 7 in the sunken space is used as the foundation for the construction elevator 8. In this way, the basement foundation slab 7 is used as the foundation for the construction elevator 8, avoiding the need for secondary pouring of the construction elevator foundation 8. At the same time, the basement foundation slab 7 has a strong load-bearing capacity, and the load of the construction elevator can be directly transferred to the slab structure, which can effectively prevent cracking and settlement of the slab surface caused by the operation of the construction elevator later.

[0029] Step 4: Pre-buried drainage pipe 2; Based on the basement drawings and the outline of the basement of the construction elevator 6, a drainage pipe 2 is pre-embedded on one side of the sunken space formed in step 2, and the drainage slope of the drainage pipe 2 is designed. The water collection end of the drainage pipe 2 is located at the top elevation of the construction elevator foundation 8, and the drainage end of the drainage pipe 2 is connected to the water collection pit.

[0030] To avoid the drainage pipe 2 damaging the waterproofing of the base slab, the drainage pipe 2 is pre-embedded in the basement foundation slab 7 outside the sunken space. At the same time, the drainage pipe 2 is located above the bottom reinforcement of the basement foundation slab reinforcement 4.

[0031] Compared to the drainage pipes configured in traditional foundation slabs, the drainage pipe 2 of this invention is a sunken design. This is mainly because the top surface elevation of the construction elevator foundation 8 is lower than the top surface elevation of the basement foundation slab 7 outside the sunken space. Therefore, water is prone to accumulate on the top surface of the construction elevator foundation 8 in the later stages, causing the base of the construction elevator 6 to be soaked. The drainage pipe 2 can ensure that rainwater and construction water are drained away in time, avoiding long-term soaking of the base of the construction elevator 6 and ensuring a dry and stable working environment at the bottom of the construction elevator 6.

[0032] Among them, the drainage pipe 2 is made of galvanized steel pipe, and the drainage end of the drainage pipe 2 is connected to the nearest existing water collection pit 3 in the original design (if the water collection pit 3 is far away, a separate water collection pit 3 will be set up), and the pipe joint is sealed and waterproofed.

[0033] Step 5: Pour concrete for the basement foundation slab 7, and use the basement foundation slab 7 in the sunken space as the foundation for the construction elevator 8; Anchor bolts 9 for the construction elevator are pre-embedded in the sunken space. One end of the anchor bolt 9 extends beyond the top surface of the construction elevator foundation 8 to facilitate the later installation and fixing of the construction elevator 6 base. A waterproof sleeve 10 is fitted over the anchor bolt 9 to prevent corrosion from water flow. The anchor bolt 9 is as follows: Figure 4 As shown; The basement foundation slab 7 concrete is poured on top of the waterproof structural layer. The basement foundation slab concrete inside and outside the sunken space is poured in layers simultaneously to form the sunken basement foundation slab 7 as a whole. The basement foundation slab 7 inside the sunken space is used as the construction elevator foundation 8. The top surface elevation of the construction elevator foundation 8 is lower than the top surface elevation of the basement foundation slab 7 outside the sunken space (for example, 500mm lower). A sunken pit for the installation of the construction elevator 6 is formed between the construction elevator foundation 8 and the basement foundation slab 7 outside the sunken space. The concrete inside and outside the sunken space is poured in layers simultaneously to maintain the continuity of the concrete and make the basement foundation slab 7 a single piece. Strictly control the concrete mixing, transportation and pouring process, control the construction time and ensure uniform vibration. A 2% drainage slope is preset on the top surface of the construction elevator foundation 8, with the slope inclined towards the water collection end of the drainage pipe 2, to ensure that the water accumulated on the top surface of the construction elevator foundation 8 can be smoothly drained away from the drainage pipe 2. A 2% drainage slope is preset on the basement foundation slab 7 around the construction elevator foundation 8, with the slope inclined towards the construction elevator foundation 8, to ensure that the water falling from the top slab opening to the area around the construction elevator foundation 8 can be smoothly drained to the top surface of the construction elevator foundation 8 and discharged through the drainage pipe 2. After the basement foundation slab 7 is formed, the surface of the construction elevator foundation 8 is cleaned to remove laitance, debris and protruding hard blocks. Low-lying areas of the slab are leveled with cement mortar to ensure that the slab surface in the installation area of ​​the construction elevator 6 is flat and solid, providing good construction conditions for the installation of the construction elevator 6.

[0034] Figure 2 In the diagram, h represents the height difference between the top surface of the construction elevator foundation 8 and the top surface of the basement foundation slab 7 outside the sunken space; H1 represents the thickness of the construction elevator foundation 8; and H2 represents the thickness of the basement foundation slab 7 outside the sunken space.

[0035] Step 6: Install and inspect the construction elevator 6; The base of construction elevator 6 is hoisted to the designated installation position on the construction elevator foundation 8, precisely leveled, and secured with the construction elevator anchor bolts 9. The standard sections of construction elevator 6 are then assembled, wall-mounted components are installed, the car is assembled, and electrical wiring and safety devices are laid out. Assembly precision is strictly controlled according to installation specifications. The entire construction elevator foundation 8 assembly is completed, ensuring the construction elevator car flip-up plate 12 is flush with the basement foundation slab 7. After the construction elevator 6 is assembled, workers inspect each fastener, wall-mounted structure, braking system, lifting system, and other key components. It can only be used after passing inspection.

[0036] Step 7: After the construction elevator 6 has been used, the construction elevator 6 shall be dismantled. After the main structure, secondary structure and decoration works on the ground are completed and the construction elevator 6 is no longer in use, the power supply system of the construction elevator 6 is cut off and the electrical supporting equipment is removed; the car, wall-mounted frame, standard section and base of the construction elevator 6 are dismantled in sequence from top to bottom.

[0037] Step 8: Backfill the sinkhole formed between the construction elevator foundation 8 and the basement foundation slab 7 outside the sinkhole. Clean up the debris and waste materials in the sinking pit, and seal the drainage pipe 2. Specifically, fill the inside of the drainage pipe 2 with mortar to seal it. Then, backfill the sinking pit with C15 plain concrete to make the basement foundation slab 7 flat and meet the design functions.

[0038] Compared to traditional methods, this invention features a partial sinking design for the basement foundation slab. The concrete basement foundation slab formed within the sinking space serves as the foundation for the construction elevator, avoiding the need for secondary pouring of the elevator foundation. This results in better overall integrity of the basement foundation slab and higher construction efficiency. Furthermore, by leveraging the high load-bearing capacity and strong structural stability of the foundation slab, the load of the construction elevator is directly borne by the foundation. This not only ensures good installation stability for the construction elevator but also eliminates the need to pour a separate construction elevator foundation on the basement roof slab or basement foundation slab, thus avoiding the waste of labor and materials caused by the need to remove the foundation after the construction elevator is dismantled. Meanwhile, since this invention directly uses the basement foundation slab as the foundation for the construction elevator, it no longer occupies the working surface of the basement roof slab. This not only frees up all the working space of the basement roof slab and opens up the vertical transportation channel between the basement and the above-ground floors, but also enables efficient transfer of personnel, materials, and machinery, completely solving the problems of traffic congestion and limited transportation routes on site, and improving the efficiency of material transfer on site. This invention independently sets up the construction elevator in the basement foundation slab area, allowing the transportation of materials above ground to be transferred to the upper floors via the basement. This avoids the accumulation of reusable materials on the basement roof slab, which would affect all construction processes on the roof slab and outdoor landscaping work, maximizing overall construction efficiency, ensuring the orderly progress of indoor and outdoor processes, and improving the overall construction efficiency of the project. Moreover, there is no need to build a protective canopy on the roof slab, avoiding waste of labor and materials. This invention uses the sunken part of the basement foundation slab as the foundation of the construction elevator, so that the elevator car flap is flush with the top surface of the basement foundation slab outside the sunken space. Material transportation can be carried in without the need to build a ramp platform, which reduces the physical exertion of workers, makes it easier for materials to enter and exit the car, and improves the efficiency of material transportation. This invention embeds a drainage pipe in the basement foundation slab on one side of the sunken space, and sets the water collection end of the drainage pipe at the elevation of the top surface of the construction elevator foundation. A drainage slope is preset on the top surface of the construction elevator foundation facing the water collection end of the drainage pipe, and a drainage slope is preset on the basement foundation slab around the construction elevator foundation towards the sunken pit. Rainwater and construction water falling from the top slab opening are systematically drained into the sunken pit, and then drained to an adjacent sump through the drainage pipe. This prevents water accumulation in the sunken pit, avoids soaking the construction elevator base and foundation, and prevents water from spreading to other construction areas in the basement, thus affecting normal construction operations.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., 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 construction method for a construction elevator foundation based on the settlement of the basement foundation slab, characterized in that: Includes the following steps: Step 1: Layout planning before construction, determine the installation location of the construction elevator on the basement foundation slab; Step 2: The basement foundation slab at the installation point selected in Step 1 is settled, and a cushion layer is constructed on the settled base. Then, a waterproof structural layer is constructed on the surface of the cushion layer. Step 3: Tie the reinforcement bars for the basement foundation slab; Step 4: Pre-install drainage pipes; Step 5: Pour the concrete for the basement foundation slab, using the basement foundation slab in the sunken space as the foundation for the construction elevator. Step 6: Install and inspect the construction elevator; Step 7: After the construction elevator has been used, dismantle the construction elevator. Step 8: Backfill the sinkhole formed between the construction elevator foundation and the basement foundation slab outside the sinkhole.

2. The construction method for construction elevator foundation based on the settlement of the basement foundation slab according to claim 1, characterized in that: Step 1 specifically includes: Based on the overall construction plan and the basement construction schedule, the maximum daily operating load and operating range of the construction elevator were calculated, and the installation point of the construction elevator was selected on the basement foundation slab. Calculate the bearing capacity of the basement foundation slab at this location to determine whether the basement foundation slab at this location can meet the long-term operating load requirements of the construction elevator. If it does not meet the requirements, then the basement foundation slab at this location should be reinforced.

3. The construction method for construction elevator foundation based on the settlement of the basement foundation slab according to claim 1, characterized in that: Step 2 specifically includes: Based on the installation point selected in step 1, the basement foundation slab at that location is excavated to form a foundation pit; A concrete cushion layer is poured on the basement foundation slab after the basement has sunk. The concrete cushion layer is poured and sunk according to the shape of the foundation pit, forming a sunken space at this location. Then, a waterproof structural layer is constructed on the surface of the concrete cushion layer.

4. The construction method for construction elevator foundation based on the settlement of the basement foundation slab according to claim 3, characterized in that: Step 3 specifically includes: Above the waterproof structural layer in step 2, the basement foundation slab reinforcement is tied. The basement foundation slab reinforcement covers the entire waterproof structural layer area and extends outward. The basement foundation slab reinforcement located in the sunken space serves as the construction elevator foundation reinforcement.

5. The construction method for construction elevator foundation based on the settlement of the basement foundation slab according to claim 4, characterized in that: The reinforcement specifications for the construction elevator foundation steel bars in the sunken space shall be based on the higher reinforcement requirement of the two working conditions: the basement foundation slab reinforcement and the elevator foundation reinforcement.

6. The construction method for construction elevator foundation based on the settlement of the basement foundation slab according to claim 4, characterized in that: Step 4 specifically includes: Based on the basement drawings and the outline of the construction elevator base, a drainage pipe is pre-embedded on one side of the sunken space formed in step 2, and the drainage slope of the drainage pipe is designed. The water collection end of the drainage pipe is located at the top elevation of the construction elevator foundation, and the drainage end of the drainage pipe is connected to the water collection pit.

7. The construction method for construction elevator foundation based on the settlement of basement foundation slab according to claim 4, characterized in that: Step 5 specifically includes: Anchor bolts for the construction elevator are pre-embedded in the sunken space, and the basement foundation slab concrete is poured above the waterproof structural layer. The basement foundation slab concrete inside and outside the sunken space is poured in layers simultaneously to form a whole sunken basement foundation slab. The basement foundation slab inside the sunken space is used as the foundation for the construction elevator. The top surface elevation of the construction elevator foundation is lower than the top surface elevation of the basement foundation slab outside the sunken space. A sunken pit for the installation of the construction elevator is formed between the construction elevator foundation and the basement foundation slab outside the sunken space.

8. The construction method for construction elevator foundation based on the settlement of basement foundation slab according to claim 7, characterized in that: Step 6 specifically includes: Hoist the construction elevator base to the designated installation position on the construction elevator foundation, level it, and fix it with the construction elevator anchor bolts. The construction elevator standard section splicing, wall-mounted component installation, car assembly, and electrical wiring and safety protection device layout were completed sequentially. The elevator car flap should be flush with the basement foundation slab. After the construction elevator is assembled, it is inspected and accepted.

9. The construction method for construction elevator foundation based on the settlement of basement foundation slab according to claim 8, characterized in that: Step 7 specifically includes: After the main structure, secondary structure and decoration works on the ground are completed and the construction elevator is no longer in use, the power supply system of the construction elevator is cut off and the electrical supporting equipment is removed; the car, wall-mounted frame, standard section and construction elevator base are dismantled in sequence from top to bottom.

10. The construction method for construction elevator foundation based on the settlement of basement foundation slab according to any one of claims 7-9, characterized in that: Step 8 specifically includes: Clean the sunken foundation pit, fill the inside of the drainage pipe with mortar, and seal it. Then, concrete was backfilled into the sunken pit.

Images