On-site modular construction method for electric construction platform foundation

Abstract

The present invention discloses an on-site modular construction method for the foundation of an electric construction platform, comprising the following steps: S1) calculating the bearing capacity of the foundation according to the load characteristics, and obtaining the concrete strength grade and the reinforcement form; S2) determining the exact position of the platform foundation according to the layout form of the construction platform; S3) for hardened ground, only the base needs to be leveled on the ground; for non-hardened ground, the soil body is pre-treated and compacted; S4) then the line laying operation is performed; S5) then the cushion layer concrete is poured, and the calendering treatment is performed after the initial setting; S6) setting up the mold; S7) tying the foundation bottom plate steel cage; S8) pouring concrete to shape the concrete; S9) demoulding, watering and curing to the specified strength of the foundation. The on-site modular construction method for the foundation of the electric construction platform provided by the present invention can meet the requirements of foundation bearing capacity, anti-shearing, etc., adapt to the ground of different properties, and has a high value of promotion and application.

Description

Technical Field

[0001] The invention relates to an on-site modular construction method, in particular to an on-site modular construction method for an electric construction platform foundation. Background Art

[0002] At present, urban renewal projects are being carried out in full swing across the country, among which the repair and maintenance of building facades is one of the key contents. The traditional facade repair operation method mainly uses scaffolding or hanging baskets. However, these two construction processes have high safety risks, long erection time, low construction efficiency, and difficult quality inspection. They cannot fully meet the growing requirements of urban renewal and safe and civilized construction. In response to the many pain points of traditional construction methods, alternative products to scaffolding and hanging baskets, namely attached electric construction platforms, have also begun to be used. Attached electric construction platforms are a new type of work platform. It is raised and lowered by gears and racks, and has a very reliable electrical and mechanical safety system. The platform can rise automatically as the building rises, and can be lengthened or shortened as needed.

[0003] Electric construction platforms can be divided into single-column and double-column types according to the number of foundations, and can be divided into linear and special-shaped (L-shaped or T-shaped) according to the layout.

[0004] However, when there is a pile load at the corner end of the double-column special-shaped electric construction platform, the construction platform has a very large overturning moment, and a higher foundation bearing capacity is required as support, otherwise the overall stability of the electric construction will deteriorate. Referring to similar attached construction machinery, the foundation is generally a base cast with concrete. The length, height, width and reinforcement of the base need to meet the requirements of overturning stability, foundation bearing capacity and base crack resistance of the attached construction machinery. However, due to the influence of the shape of the construction platform legs, the foundation of the electric construction platform bears several circular uniformly distributed loads, and it is impossible to directly adopt a form similar to the foundation of attached construction machinery. Therefore, it is urgent to provide a foundation suitable for the electric construction platform according to the characteristics of the load form and a modular adaptation method based on the site. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an on-site modular construction method for the foundation of an electric construction platform, which can meet the requirements of foundation bearing capacity, shear resistance, etc., adapt to ground of different properties, and has high promotion and application value.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide an on-site modular construction method for the foundation of an electric construction platform, comprising the following steps: S1) calculating the bearing capacity of the foundation according to the load characteristics to obtain the concrete strength grade and the reinforcement form; S2) determining the exact position of the platform foundation according to the layout of the construction platform; S3) for hardened ground, only the base needs to be leveled on the ground; for non-hardened ground, the soil is pretreated and compacted; S4) then the line laying operation is performed; S5) then the cushion layer concrete is poured, and the calendering treatment is performed after the initial setting; S6) setting up the mold; S7) tying the foundation bottom plate steel cage; S8) pouring concrete to form the concrete; S9) demolding, watering and curing to the specified strength of the foundation.

[0007] Furthermore, the step S3 includes: S31) for the location of the residential patio, no pretreatment is performed and step S4 is directly entered; S32) for the flower bed or greening, the soil is compacted, and when the compaction degree reaches 94% and the design bearing capacity on the foundation is not less than 60kPa, step S4 is entered; S33) for the treated asphalt or concrete floor, the base is leveled on the ground and then step S4 is entered; S34) when encountering the walkway steps, four platform buffer devices are used to adjust and level the height difference and then step S4 is entered.

[0008] Furthermore, each platform buffer device in step S34 includes at least one square base, a sleeve is provided on the topmost square base, a central axis is provided in the sleeve, a return spring is provided at each of the upper and lower ends of the central axis, one end of the central axis extends into the sleeve together with a return spring, and the other end of the central axis is connected to an impact head.

[0009] Furthermore, a first return spring is arranged at one end of the central axis, the diameter of the first return spring is less than or equal to the diameter of the central axis, and one end of the central axis extends into the sleeve together with the first return spring; the other end of the central axis is an impact head and a second return spring is arranged, the second return spring is sleeved outside the central axis, one end of the second return spring is abutted against the sleeve, and the other end of the second return spring is abutted against the impact head.

[0010] Furthermore, the installation process of the four platform buffer devices is as follows: i) positioning and laying out according to the construction plan, determining the specific position of the platform buffer device and marking it; ii) calculating the height of the platform buffer device so that the height of the impact head of the platform buffer device is greater than the elevation of the chassis of the construction platform base; iii) welding the sleeve to the first square base; iv) assembling the impact head, central axis and return spring of the platform buffer device; v) stacking the square bases to a specified height; vi) using high-strength connecting bolts to connect the L-shaped grounding connector and the steel base to form a whole; vii) repeating steps iii to vi to complete the assembly of the four platform buffer devices; and fixing the four buffer devices at the ground mark of the chassis gap positioning line, where the positioning line is the projection position of the four corner points of the lifting device.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The on-site modular construction method of the electric construction platform foundation provided by the present invention has the following characteristics: (1) The cast-in-place concrete foundation and modular construction method developed for the electric construction platform can meet the bearing capacity requirements and shear resistance requirements of the foundation. (2) The cast-in-place concrete foundation and modular construction method developed for the electric construction platform can meet the requirements of the overall stability of the machinery. (3) The cast-in-place concrete foundation construction method of the electric lifting platform has good applicability and can be applied to road surfaces with different conditions. (4) The platform buffer device is used to adjust the height difference to meet the on-site modular construction requirements and is applicable to sites with different height differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a flowchart of the on-site modular construction of the electric construction platform foundation of the present invention;

[0013] Figure 2 This is a flow chart of the classification and processing of the stratum properties where the electric construction platform foundation of the present invention is located;

[0014] Figure 3 This is a schematic diagram of the assembly of the platform buffer device used in the present invention;

[0015] Figure 4 This is a schematic diagram of the structure of the platform buffer device after assembly used in the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 The present invention is a flowchart of on-site modular construction of the electric construction platform foundation.

[0018] See also Figure 1 The on-site modular construction method of the electric construction platform foundation provided by the present invention includes the following steps and contents:

[0019] S1) Calculate and design the foundation bearing capacity and other indicators according to the load characteristics to obtain the concrete strength grade and reinforcement form. Preferably, when a 2500mmx2500mm thick 250mm flat plate foundation is used, and double-layer bidirectional 12@150 steel bars are provided, the platform base force requirements are generally met.

[0020] S2) Determine the exact location of the foundation based on the layout of the construction platform.

[0021] S3) Conduct a field survey of the construction site and collect statistics based on the nature of the ground on which the foundation is located. The ground can be divided into hardened ground and non-hardened ground. Hardened ground includes cement pavement or asphalt pavement. Non-hardened ground includes flower beds, lawns, mud and other types. Hardened ground can basically meet the bearing capacity requirements of the foundation, and only the base needs to be leveled on the ground. Non-hardened ground requires some pretreatment to meet the paving requirements. When the foundation must be laid on a flower bed or greening, the greening under the base of the machine position can be removed if the soil has poor engineering properties. When the soil has good engineering properties, a butterfly tamping machine can be used to compact the soil. When the compaction degree reaches 94%, the design bearing capacity on the foundation is not less than 60kPa, which is considered to meet the requirements; see the specific flow chart. Figure 2 .

[0022] S4) Then the wire-releasing operation is performed.

[0023] S5) Then pour the cushion layer concrete, and perform calendering after initial setting.

[0024] S6) Setting up the mould.

[0025] S7) The foundation slab reinforcement cage should be laid according to the design drawing, and the connection position and size of the reinforcement should be taken into consideration.

[0026] S8) pouring concrete to form the concrete.

[0027] S9) Demoulding, watering and curing to the specified strength of the foundation.

[0028] The on-site modular construction method of the electric construction platform foundation provided by the present invention, step S3 comprises:

[0029] S31) For the location of the residential patio, no pre-processing is performed and the process directly proceeds to step S4;

[0030] S32) For flower beds or greening, compact the soil, and when the compaction degree reaches 94% and the designed bearing capacity on the foundation is not less than 60 kPa, proceed to step S4;

[0031] S33) For the treated asphalt or concrete floor, after the base is leveled on the ground, proceed to step S4;

[0032] S34) When the walkway steps are encountered, the height difference is adjusted and leveled using an I-beam or four dedicated platform buffer devices, and then the process proceeds to step S4.

[0033] In order to ensure the safety of construction workers, meet the requirements of modular construction on site, and be applicable to different height difference sites, it is preferred to use a platform buffer device to adjust the height difference. Each platform buffer device includes at least one square base 1. A sleeve 2 is arranged on the top square base 1. A central axis 3 is arranged in the sleeve 2. A return spring is arranged at each of the upper and lower ends of the central axis 3. One end of the central axis 3 extends into the sleeve 2 together with a return spring. The other end of the central axis 3 is connected to an impact head 6. Figure 4 shown.

[0034] The diameter of the central axis 3 is 80 mm and the length is 120 mm. The specifications of the return spring are as follows:

[0035] First return spring: YA type 14×95×60 (GB / T 2089)

[0036] Second return spring: YA type 14×65×20 (GB / T 2089)

[0037] Specifically, a first return spring 4 is provided at one end of the central axis 3, and a diameter of the first return spring 4 is less than or equal to a diameter of the central axis 3. One end of the central axis 3 extends into the sleeve 2 together with the first return spring 4. The other end of the central axis 3 is an impact head 6 and a second return spring 5 is provided. The second return spring 5 is sleeved outside the central axis 3, one end of the second return spring 5 abuts against the sleeve 2, and the other end of the second return spring 5 abuts against the impact head 6.

[0038] See also Figure 3 and Figure 4 The four platform buffer devices of the present invention are easy to disassemble and install. The installation process is as follows:

[0039] i) Position and lay out according to the construction plan, determine the specific location of the platform buffer device, and mark it with white chalk;

[0040] ii) Calculate the height of the platform buffer device so that the height of the impact head of the platform buffer device is greater than the elevation of the base chassis of the construction platform;

[0041] iii) welding the sleeve 2 to the first square base 1;

[0042] iv) Assembling the impact head 6, the middle shaft 3 and the return spring of the platform buffer device;

[0043] v) stacking the square base 1 to a specified height;

[0044] vi) Use high-strength connecting bolts to connect the L-shaped grounding connector 8 and the steel base to form a whole, such as Figure 4 As shown;

[0045] vii) Repeat steps iii to vi to complete the assembly of the four platform buffer devices; and fix the four buffer devices at the ground marks of the chassis gap positioning line, where the positioning line is the projection position of the four corner points of the lifting device.

[0046] The dismantling order is opposite to the above order and will not be repeated here.

[0047] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the claims.

Claims

1. A modular construction method for an electric construction platform foundation, characterized in that: The steps include: S1) Calculate the bearing capacity of the foundation according to the load characteristics to obtain the concrete strength grade and reinforcement form; S2) Determine the exact location of the platform foundation according to the layout of the construction platform; S3) For hardened ground, only the base needs to be leveled on the ground; for non-hardened ground, soil pretreatment and compaction are required; S4) then perform the wire-laying operation; S5) Then pour the cushion layer concrete, and perform calendering after initial setting; S6) Setting up the mould; S7) Tie the foundation slab reinforcement cage; S8) pouring concrete to form the concrete; S9) demoulding, watering and curing to the specified strength of the foundation; The step S3 comprises: S31) For the location of the residential patio, no pre-processing is performed and the process directly proceeds to step S4; S32) For flower beds or green areas, compact the soil. When the compaction degree reaches 94% and the designed bearing capacity of the foundation is not less than 60 kPa, proceed to step S4; S33) For the treated asphalt or concrete floor, after the base is leveled on the floor, proceed to step S4; S34) When the walkway steps are encountered, four platform buffer devices are used to adjust and level the height difference and then enter step S4; Each platform buffer device in step S34 includes at least one square base, a sleeve is provided on the uppermost square base, a central axis is provided in the sleeve, a return spring is provided at each of the upper and lower ends of the central axis, one end of the central axis extends into the sleeve together with the return spring, and the other end of the central axis is connected to an impact head; A first return spring is arranged at one end of the central axis, and the diameter of the first return spring is less than or equal to the diameter of the central axis. One end of the central axis extends into the sleeve together with the first return spring; the other end of the central axis is an impact head and a second return spring is arranged thereon, and the second return spring is sleeved outside the central axis, one end of the second return spring abuts against the sleeve, and the other end of the second return spring abuts against the impact head.

2. The on-site modular construction method of the electric construction platform foundation according to claim 1, characterized in that: The installation process of the four platform buffer devices is as follows: i) Position and lay out according to the construction plan, determine the specific location of the platform buffer device and mark it; ii) Calculate the height of the platform buffer device so that the height of the impact head of the platform buffer device is greater than the elevation of the base chassis of the construction platform; iii) welding the sleeve to the first square base; iv) Assemble the impact head, center shaft and return spring of the platform buffer device; v) Stack the square bases to a specified height; vi) Use high-strength connecting bolts to connect the L-shaped grounding connector and the steel base to form a whole; vii) Repeat steps iii to vi to complete the assembly of the four platform buffer devices; and fix the four buffer devices to the ground marks of the chassis gap positioning line, where the positioning line is the projection position of the four corner points of the lifting device.

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