Basement foundation platform steel plate wall moulding bed

Abstract

The utility model relates to a basement foundation platform steel plate wall moulding bed, and belongs to the field of building construction. The supporting structure comprises a plurality of inclined struts, a plurality of horizontal diagonal bracings and a plurality of angle bracings, the inclined struts are arranged on the side face of the inner side of a steel plate wall moulding bed, a supporting welding point is arranged at the 1 / 2 height position of a steel plate wall, and a stress point is arranged on a pile foundation; the steel plate wall moulding bed is provided with a plurality of horizontal diagonal bracings, a layer of diagonal bracings is arranged at the top of the steel plate wall and below the top every 2m, and each layer of diagonal bracings is arranged along the parallel short edge direction at an interval of 2m; a plurality of angle braces are arranged at the corners of the steel plate wall moulding bed, and angle braces are arranged at the top of the steel plate wall and below the top every 2m. The device is reasonable in structural design, safe and reliable, reduces the construction time of the on-site moulding bed, improves the soil side pressure resistance of the moulding bed, ensures the construction quality, reduces the labor intensity, is convenient to operate, and meets the use requirements.

Description

Technical Field

[0001] The utility model relates to a steel plate wall formwork, in particular to a basement foundation bearing platform steel plate wall formwork, and belongs to the field of building construction. Background Art

[0002] Traditionally, the formwork for basement pedestals, elevator shafts, water collection wells, etc. uses brick formwork, which has the following disadvantages: the work process is cumbersome, the efficiency is low, and the quality is difficult to guarantee. In addition, in an environment with soft soil and large changes in groundwater levels, brick formwork is prone to deformation or collapse, posing a safety hazard.

[0003] Therefore, it is particularly necessary to provide a safe and reliable foundation steel plate wall formwork that can reduce on-site formwork construction time, improve the soil side pressure resistance of the formwork, ensure construction quality, and reduce labor intensity. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a basement foundation cap steel plate wall formwork which has a reasonable structural design, is safe and reliable, reduces on-site formwork construction time, improves the formwork's ability to resist soil side pressure, ensures construction quality, reduces labor intensity, and is easy to operate.

[0005] The technical solution adopted by the utility model to solve the above-mentioned problem is: the basement foundation pedestal steel plate wall formwork includes multiple oblique braces, multiple horizontal braces and multiple angle braces, and is characterized in that: multiple oblique braces are arranged on the inner side of the steel plate wall formwork, the support welding point is arranged at 1 / 2 of the height of the steel plate wall, and the force point is arranged on the pile foundation; the steel plate wall formwork is arranged with multiple horizontal braces, a layer of braces is arranged every 2m at the top of the steel plate wall and downward from the top, and each layer of braces is arranged at a spacing of 2m in the direction parallel to the short side; multiple angle braces are arranged at the corners of the steel plate wall formwork, and a angle brace is arranged every 2m at the top of the steel plate wall and downward from the top.

[0006] Preferably, the single supporting platform of the utility model with a mold height in the range of 1.2m-3m has a template surface layer made of 2mm steel plate.

[0007] Preferably, for a single pedestal with a formwork height in the range of 3m-6m, or a large-span pedestal with a single side length exceeding 6m, the template surface layer is made of 3mm steel plate.

[0008] Preferably, the utility model further comprises ribs, the longitudinal and transverse spacing of the ribs of the steel plate wall is 1 m, and the ribs are made of 12# I-beams or 10# I-beams.

[0009] Preferably, the diagonal braces of the utility model are made of 10# I-beams, the horizontal braces are made of 10# I-beams, and the angle braces are made of 10# I-beams.

[0010] Compared with the prior art, the utility model has the following advantages and effects: the overall process is reasonable, safe and reliable, and easy to operate. According to the retaining height of the side form of the pedestal, suitable steel plate wall formwork specifications and sizes are designed; the steel plate wall formwork is used to replace the traditional bricklaying steps, which significantly improves the soil side pressure resistance of the formwork, ensures the construction quality of key structures such as the basement pedestal, elevator shaft, and water collection well, and reduces labor intensity; while ensuring construction safety and improving project quality, the construction period is significantly shortened; the steel plate wall formwork method adopts a combination of prefabricated steel plates and on-site construction finalization. This step greatly reduces the on-site formwork construction time, and has multiple advantages such as high efficiency, economy, safety, and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the assembly structure of the steel plate wall formwork according to an embodiment of the utility model.

[0012] Figure 2 It is a schematic structural diagram of a single-side steel plate component of a steel plate wall formwork according to an embodiment of the utility model.

[0013] Figure 3 The utility model is a schematic diagram of the large-span steel plate wall brick formwork structure of the embodiment of the utility model.

[0014] Figure 4 yes Figure 3 Schematic diagram of the AA cross-sectional structure.

[0015] Figure 5 yes Figure 3 Schematic diagram of the BB cross-section structure.

[0016] In the figure: diagonal brace 1, horizontal brace 2, angle brace 3, steel plate wall 4, I-beam 5, rib 6, 3mm thick steel plate 7, 100mm thick prefabricated porous plate 8. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0018] Example

[0019] See also Figures 1 to 5The steel plate wall formwork for the basement foundation pedestal implemented in this invention includes multiple diagonal braces 1, multiple horizontal braces 2 and multiple angle braces 3. Multiple diagonal braces 1 are arranged on the inner side of the steel plate wall formwork, the support welding point is arranged at 1 / 2 height of the steel plate wall, and the force point is arranged on the pile foundation; multiple horizontal braces 2 are arranged on the steel plate wall formwork, and a layer of braces 2 is arranged every 2m on the top of the steel plate wall and downward from the top, and each layer of braces is arranged at a spacing of 2m in the direction parallel to the short side; multiple angle braces 3 are arranged on the corners of the steel plate wall formwork, and a angle brace 3 is arranged every 2m on the top of the steel plate wall and downward from the top.

[0020] In this embodiment, the height of the mold is within the range of 1.2m-3m for a single support, and the template surface layer is made of 2mm steel plate.

[0021] In this embodiment, for a single pedestal with a formwork height in the range of 3m-6m, or a large-span pedestal with a single side length exceeding 6m, a 3mm steel plate is used as the template surface layer.

[0022] In this embodiment, the vertical and horizontal spacings of the ribs of the steel plate wall are 1m, and the ribs are made of 12# I-beams or 10# I-beams.

[0023] In this embodiment, the diagonal braces are made of 10# I-beams, the horizontal braces are made of 10# I-beams, and the angle braces are made of 10# I-beams.

[0024] The specific steps of the efficient construction of the steel plate wall formwork of the basement foundation cap in this embodiment are as follows:

[0025] (S0) Construction preparation

[0026] 1. Before construction, make a good construction organization design, prepare a construction plan, and clarify the construction steps, construction technology, and process flow.

[0027] 2. Conduct construction technology and safety briefings for the construction team, familiarize them with the construction drawings and related technical data, and conduct relevant training. The construction personnel carefully review the drawings and understand the relationship between the size of the foundation beam and the elevation, position and axis of the cap.

[0028] 3. Make good arrangements for construction equipment, materials, testing, monitoring, safety and quality management. Make good inspection and acceptance of AC welding machines, truck cranes and other construction equipment when they enter the site, and start construction after passing the acceptance.

[0029] 4. Organize drainage and rain prevention work to prevent slope collapse, water accumulation in foundation pits, etc., and make emergency preparations.

[0030] 5. The raft, pedestal, elevator and water collection well shall be excavated mechanically to 300mm above the bottom elevation and then manually excavated and trimmed to prevent disturbance of the base soil and cause instability of the base soil.

[0031] (S1) Steel plate wall formwork size design

[0032] According to the base plate drawings in the design and construction drawings, analyze the forces that the steel plate wall formwork may bear during construction and use (including deadweight, construction load, wind load, lateral earth pressure, etc.), design the formwork structure accordingly, comprehensively consider the restrictions of the construction site and transportation conditions, and select the appropriate customized module size:

[0033] 1. For a single pedestal with a formwork height in the range of 1.2m-3m, the steel plate wall formwork parameters are designed according to the specific conditions of the project: ① The template surface layer is made of 2mm steel plate, and the design is based on the pedestal size and the formwork height (for example, a 5000*6000*2800 pedestal with a bottom plate thickness of 800, then the steel plate wall formwork consists of 2 prefabricated steel plate components of 5000*2000 and 2 prefabricated steel plate components of 6000*2000); ② The back rib 6 adopts 10# I-beam 5, and the longitudinal and transverse spacing of the rib 6 is 1m; ③ A 10# I-beam diagonal brace 1 is set on the side of the steel plate wall 4, and the welding support point is set at about 1 / 2 of the height of the steel plate wall 4, and the force point is set on the pile foundation. The four sides of the steel plate wall 4 are prefabricated, and the corners of the steel plate wall 4 are welded on site.

[0034] 2. For single caps with formwork heights between 3m and 6m, or large-span caps with a single side length exceeding 6m, design the steel plate wall formwork parameters according to the specific conditions of the project: ① Use 3mm steel plate for the template surface layer, and design it according to the size of the cap and the formwork height: for example, a 38m*8.8m special-shaped cap with a bottom plate thickness of 800 and prefabricated steel plate components, see Figure 3-Figure 5 (3mm thick steel plate 7, 100mm thick prefabricated porous plate 8; ② The back rib 6 adopts 12# I-steel, and the vertical and horizontal spacing of the rib 6 is 1m; ③ A 10# I-steel diagonal brace 1 is set on the side of the steel plate wall 4, and the welding support point is set at about 1 / 2 of the height of the steel plate wall 4, and the force point is set on the pile foundation; ④ A layer of 10# I-steel horizontal brace 2 is set parallel to the short side direction and spaced 2m every 2m at the top of the steel plate wall 4 and the top downward; ⑤ A 10# I-steel angle brace 3 is set at the corner every 2m at the top of the steel plate wall 4 and the top downward; The surrounding steel plate wall 4 is prefabricated. If the length is too long, the length of the steel plate component can be divided according to the lifting and transportation restrictions, and the corners and butt joints of the steel plate wall 4 are welded on site;

[0035] Clarify the specifications, procedures, standards and regulations followed during the operation; the selection of main materials, welding materials, connectors, etc.; welding groove form, welding process, weld quality grade and non-destructive testing requirements; the geometric dimensions of components and allowable deviations; surface rust removal and spray painting.

[0036] (S2) Steel plate wall formwork factory prefabrication

[0037] During factory processing, the performance and model of the main processing equipment will be determined according to the design requirements of the structural components; a plan for the demand for production tools and equipment will be prepared according to the processing schedule; and factory processing and production of formwork steel plate components will be carried out based on the daily processing volume and the maximum weight of the components, the size of the processed components, the plate thickness, drawing requirements, and the on-site construction schedule.

[0038] (S3) Prefabricated components entering site

[0039] 1. According to the installation schedule, the steel plate wall formwork steel plate components will be transported to the site. After the components arrive at the site, check whether the quantity and number of the components are consistent with the freight list on the vehicle and whether the components are matched; if any problems are found, the supplier should take prompt measures to replace or supplement the components.

[0040] 2. According to the actual needs of the site, the precise time for each component and material to arrive at the site shall be clarified, and a detailed component arrival plan shall be prepared. The arrival plan shall be accurate to the date and component number. The components shall arrive at the site at least two days before the hoisting. The limited storage yard at the site during installation shall be fully considered, and the relationship between the installation site and the production and processing shall be coordinated as much as possible to ensure that the installation is carried out as planned;

[0041] 3. Component markings should be exposed and durable, and be able to withstand special conditions such as sunlight, wear, wind and rain erosion. If necessary, they can be stamped for easy identification and inspection. Bundled component markings should be in one direction, and there should be a component summary on the outer packaging. The summary should accurately include information on the components and materials in the bundle. The packed components should be numbered and there should be a detailed component summary outside the box. The summary mark should be clearly recognizable. Pay attention to the safety of hoisting and stacking of component loading and unloading to prevent accidents.

[0042] 4. Contact the on-site command center before the components enter the site, and coordinate and arrange the storage yard, unloading personnel, and equipment in a timely manner. For large quantities or multiple vehicles entering the site at one time, the entry order, entry time, and queue parking positions of all vehicles should also be clarified. After the components are transported to the site, the handover and acceptance procedures must be carried out in accordance with the prescribed procedures.

[0043] 5. The loading, unloading, transportation, and stacking of components must be explained to the workers and drivers so that each worker and driver knows the work content and precautions clearly to ensure the safe and efficient entry of components.

[0044] (S4) Inspection and acceptance of the previous process

[0045] When pouring the bottom slab cushion, full consideration should be given to the formwork thickness, protective layer, waterproof layer, and support replacement form. The raft slab is poured fully to the edge of the retaining piles, and the cap and elevator cushion extend 100mm outside the formwork components. After the cushion construction is completed, the lines are laid out according to the reference points and the axis of the design drawings. The laying results are checked to confirm whether the positions, sizes, and angles of all lines meet the design requirements and construction needs.

[0046] After acceptance, the positioning reinforcement for steel plate wall formwork installation is carried out on the cushion layer, with the positioning reinforcement being φ12@2000;

[0047] (S5) Steel plate component lifting

[0048] 1. Lifting and hoisting

[0049] Before lifting the steel plate, the installation site must be cleaned up, and the steel plate with the corresponding position and number must be found and hoisted to the corresponding foundation pit with a tower crane. When lifting, the lifting equipment and slings must be installed according to the reserved lifting rings of the steel plate. If the reserved lifting rings of the steel plate are damaged and the lifting equipment cannot be installed, the steel plate should be returned to the factory in time. When lifting the steel plate at two points, one point lifting is not allowed. Ensure that the steel plate is always in a vertical state during lifting, and lift the steel plate above the installation point safely and quickly;

[0050] 2. Positioning

[0051] The unhooking personnel should operate in the pit. According to the internal control line on the bottom, the steel plate is slowly lowered to determine the exact location of the steel plate in the building structure. When the steel plate is hoisted into the pit, the staff will pull it to the installation position according to the cushion positioning control line. The unhooking can only be carried out after the steel plate is hoisted to the designated position and temporarily fixed.

[0052] (S6) Pre-assembly of steel plate wall formwork on site

[0053] After the steel plate is in place, remove the tower crane, adjust the steel plate to make it precisely in place, and use steel bar bracing to fix it preliminarily. Temporary fixing measures should be safe and reliable. Spot welding is used between steel plate components to form a preliminary connection. After the frame is completed, check the installation conditions such as the position and elevation of the steel plate wall 4. Ensure that there is no tilt during placement, fine-tune the position and elevation, strictly control the verticality and elevation, and ensure that the installation position and installation accuracy of the steel plate wall 4 meet the design requirements. In this process, the tower crane can be used for hoisting to assist in adjusting the position of the steel plate wall formwork.

[0054] (S7) Steel plate wall formwork welding

[0055] After the pre-assembly of the steel plate is completed, the axis, elevation and size are checked. After the technicians confirm that they are correct, the construction workers weld and fix the steel plate wall 4 to the steel plate wall 4 and the steel plate wall 4 to the support to ensure the integrity and stability of the steel plate wall formwork.

[0056] (S8) Steel plate wall formwork support and reinforcement

[0057] After the steel plate wall formwork is installed and welded, first set the diagonal brace 1 on the inner side of the steel plate wall formwork. The diagonal brace 1 is made of 10# I-beam 5. The support welding point is set at about 1 / 2 of the height of the steel plate wall 4, and the force point is set on the pile foundation. Then set the horizontal brace 2 on the steel plate wall formwork. The horizontal brace 2 is made of 10# I-beam 5. A layer of horizontal brace 2 is set every 2m at the top of the steel plate wall 4 and the top downward. Each layer of horizontal brace 2 is set at a spacing of 2m in the direction parallel to the short side. Angle brace 3 is set at the corner of the steel plate wall formwork. Angle brace 3 is made of 10# I-beam 5. Angle brace 3 is set every 2m at the top of the steel plate wall 4 and the top downward.

[0058] (S9) Detailed processing of steel plate wall formwork

[0059] 1. Treat the 4 corner joints of the steel plate wall. First, use steel bars to assist in welding the 4 corners of the steel plate wall, and then use foaming agent to fill the gaps. Use foaming agent to fill the gaps and fix the connection, enhance the fixation and sealing between the steel plates, and prevent water leakage at the weld position.

[0060] 2. R-angle treatment at the bottom of the steel plate wall formwork. To prevent the mud outside the pedestal from seeping into the pedestal from the bottom and to facilitate the later waterproofing construction, the front and back sides of the bottom of the steel plate wall 4 are treated with R-angle treatment with waterproof mortar.

[0061] 3. Cut off the lifting ring.

[0062] In order to facilitate the later construction of the waterproof layer, the excess rings are cut off.

[0063] 4. Take drainage measures in the pit. In order to reduce the erosion and soaking of steel plates in the foundation pit by accumulated water, resulting in water accumulation, mud pollution and landslides in the foundation pit, drainage measures should be taken; at the bottom of the foundation pit, brick drainage ditches and water collection wells should be built along the periphery of the bottom plate; special personnel should be assigned to carry out drainage work, and it is strictly forbidden to soak the foundation for a long time with accumulated water. The accumulated water in the water collection pit should be pumped out in time.

[0064] Backfill of steel plate wall sidewall

[0065] First, remove the grass, tree roots, water, silt and debris in the side wall gaps, and take measures to prevent surface water from flowing into the filling area, soaking the foundation and causing the base soil to sink. Then backfill the gaps in the side wall of the steel plate wall formwork with soil, and use plain soil to compact the backfill in layers.

[0066] Use a small excavator to backfill the soil. During the backfill operation, pay attention to the condition of the steel plate wall formwork. If it is tilted or deformed, stop the operation immediately. After eliminating the danger, backfill the foundation pit. Backfill and compaction should be carried out on both sides or all around at the same time. When deep and shallow pits (trench) are connected, the deep pit (trench) should be filled first, and after they are leveled, they should be filled and compacted in layers with the shallow pit.

[0067] (S11) Construction of base slab cushion

[0068] After the backfill of the outer side of the steel plate wall formwork is completed, the steel plate wall is tied with φ12 steel bars between the adjacent steel plate wall formworks. The remaining bottom plate cushion layer is poured.

[0069] Inspect and accept the construction quality of the steel plate wall formwork before proceeding to the next construction process.

[0070] The technologies and solutions adopted in this embodiment are as follows:

[0071] 1. Material selection: Steel plates, angle steels, I-beams 5, etc. are selected as the main materials for the tire formwork because steel plates have high strength and rigidity, can effectively withstand soil side pressure and water pressure, and reduce the risk of deformation and collapse.

[0072] 2. Design optimization: The design of the steel plate wall formwork comprehensively considers factors such as the size of the pedestal, the depth of the formwork retaining soil and the surrounding environmental conditions. The specifications and sizes of the steel plate and the rib 6 are determined through force calculation to achieve the optimal structural stability.

[0073] 3. Prefabrication and on-site assembly: The steel plate components of the steel plate wall formwork can be prefabricated in the factory and then transported to the construction site for assembly; this prefabrication production method improves the processing accuracy of the material and reduces the complexity and uncertainty of on-site construction.

[0074] 4. Construction efficiency: The installation of steel plate wall formwork is simple and quick, which can greatly shorten the construction period.

[0075] 5. Improved safety: The use of steel plate wall formwork reduces the safety risks caused by unstable earthwork and provides a safer working environment for construction workers.

[0076] 6. Environmental protection: Compared with traditional masonry steps, the on-site construction process of steel plate wall formwork generates less waste and has less impact on the surrounding environment, which is in line with the concept of green building.

[0077] The specific embodiments of the steel plate wall formwork used in this embodiment and the traditional brick formwork are compared as follows:

[0078] 1. The brick formwork used in the general industry standard is cheap, but the construction time is long. Our steel plate wall formwork is expensive, but the construction is fast. The key point of the steel plate wall formwork is to save time. Considering the overall construction benefits, the cost-effectiveness of using brick formwork is slightly inferior to that of using steel plate wall formwork, especially for some key projects and projects with short construction periods. In addition, the steel plate wall formwork has the advantages of strong load-bearing capacity and stable foundation. In the future, the impact of surrounding demolition and settlement on the foundation will be small.

[0079] Cost comparison:

[0080] Take the second floor of a basement as an example. The bottom plate is divided into several construction blocks according to the post-cast joints. The formwork area of ​​the pedestal, water collection well and elevator shaft side wall in a certain block is 300 m2.

[0081] The cost of using steel plate wall formwork in this block:

[0082]

[0083] The cost of using traditional brick formwork in this area is:

[0084]

[0085] Comparison of the construction period of this block:

[0086]

[0087] The construction period of this block is reduced and the cost is saved:

[0088]

[0089] By adopting the construction steps of this embodiment, the overall cost reduction for the basement floor construction in this area is: 329,600-(301,500-58,830)=86,930 yuan, that is, the overall economic benefit is saved by 86,930 yuan.

[0090] 2. The traditional formwork is supported on the outside of the formwork, and the inside of the formwork is reinforced concrete, which mainly controls the force from the inside to the outside; the steel plate wall formwork is supported on the inside of the formwork, and in the initial stage it mainly bears the squeezing force of the outside soil pressure on the formwork to prevent overturning; when pouring concrete, the outside soil pressure mainly helps to bear the concrete pressure.

[0091] like Figure 4 As shown: due to the difference in the main force directions, the steel plate wall on the ground is supported on the outside of the template, and the steel plate wall formwork in this application is supported on the inside of the template.

[0092] Through the above description, those skilled in the art can already implement it.

[0093] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A steel plate wall formwork for a basement foundation cap, comprising a plurality of diagonal braces, a plurality of horizontal braces and a plurality of angle braces, characterized in that: A plurality of diagonal braces are arranged on the inner side of the steel plate wall formwork, the support welding point is arranged at 1 / 2 height of the steel plate wall, and the force point is arranged on the pile foundation; a plurality of horizontal braces are arranged on the steel plate wall formwork, a layer of braces is arranged every 2m at the top of the steel plate wall and downward from the top, and each layer of braces is arranged at a spacing of 2m in the direction parallel to the short side; a plurality of angle braces are arranged on the corners of the steel plate wall formwork, a angle brace is arranged every 2m at the top of the steel plate wall and downward from the top.

2. The basement foundation cap steel plate wall formwork according to claim 1, characterized in that: The single pedestal with a formwork height in the range of 1.2m-3m has a template surface layer made of 2mm steel plate.

3. The basement foundation cap steel plate wall formwork according to claim 1, characterized in that: For a single pedestal with a formwork height in the range of 3m-6m, or a large-span pedestal with a single side length exceeding 6m, the template surface layer is made of 3mm steel plate.

4. The basement foundation cap steel plate wall formwork according to claim 1, characterized in that: It also includes ribs, the longitudinal and transverse spacing of the ribs of the steel plate wall is 1m, and the ribs are made of 12# I-beams or 10# I-beams.

5. The basement foundation cap steel plate wall formwork according to claim 1, characterized in that: The diagonal braces are made of 10# I-steel, the horizontal braces are made of 10# I-steel, and the angle braces are made of 10# I-steel.

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