A steel plate caisson structure for building construction and use method thereof

Abstract

The present invention relates to the field of groundwater treatment in construction, specifically a steel plate caisson structure for construction and a method for using the same. The main application scenario is that under deep pebble strata, the large surface of the bottom of the foundation pit is above the groundwater level, and only the local deepening area (such as a sump, elevator shaft, etc.) is below the groundwater level. Groundwater control measures need to be taken in the deepening area. Since the deepening area is relatively scattered, conventional water stopping and precipitation schemes are costly and have a long construction period. A steel plate caisson structure for construction and a method for using the same, including a caisson bottom plate, a steel casing is fixed at the center of the upper surface of the caisson bottom plate, the steel casing passes through the caisson bottom plate and the bottom end is flush with the bottom surface of the caisson bottom plate, and a copper stop valve is installed on the inner side of the bottom end of the steel casing. The present invention is easy to process and manufacture on site, has a simple structure, and has a low manufacturing cost, which significantly saves costs and construction period, creates favorable conditions for structural construction, and improves work efficiency.

Description

Technical Field

[0001] The invention relates to the field of groundwater treatment in building construction, and in particular to a steel plate caisson structure for building construction and a use method thereof. Background Art

[0002] Groundwater refers to water that exists in the pores of rocks below the ground. In a narrow sense, it refers to water in the saturated aquifer below the groundwater surface. Before construction, foundation pit excavation is required. When the bottom elevation of the foundation pit is above the groundwater level, it cannot meet the requirements of dry trench operation of the structure, and groundwater control measures need to be taken for the construction foundation pit.

[0003] At present, there are two main measures for controlling groundwater in foundation pits, namely precipitation and water-stop curtain. Precipitation guides groundwater from the construction site to the periphery of the construction site through a certain number of precipitation wells, while water-stop curtain is a continuous water-stopping method that uses curtains to prevent or reduce groundwater from the side walls and bottom of the foundation pit from flowing into the foundation pit.

[0004] When the overall bottom elevation of the foundation pit is above the groundwater level, but the local deepening area is below the groundwater, and the thick pebble stratum has a large permeability coefficient, when the aquifer thickness is large, the cost of using conventional precipitation methods and water-stop curtains is high. At the same time, the local deepening area is more dispersed, resulting in a longer construction period and difficulty; therefore, it does not meet the existing needs. In this regard, we propose a steel plate caisson structure for construction and its use method. Summary of the invention

[0005] The object of the present invention is to provide a steel plate caisson structure for construction and a method of using the same, so as to solve the problems raised in the above-mentioned background technology that the deep pebble strata have a large permeability coefficient, and when the aquifer thickness is large, the cost of the local deepening area precipitation method and the water-stop curtain are high.

[0006] To achieve the above object, the present invention provides the following technical solution: a steel plate caisson structure for construction, comprising a caisson bottom plate, a steel casing is fixed at the center of the upper surface of the caisson bottom plate, the steel casing passes through the caisson bottom plate and the bottom end is flush with the bottom surface of the caisson bottom plate, a copper stop valve is installed inside the bottom end of the steel casing, and a quick-install caisson enclosure is installed above the caisson bottom plate;

[0007] The quick-install caisson enclosure includes two first enclosures and two second enclosures. The two first enclosures are parallel to each other, and the two second enclosures are parallel to each other. After the ends of the first enclosure and the second enclosure are attached to each other, three groove plates evenly spaced up and down are fixed on the outer walls of the first enclosure and the second enclosure, and multiple linearly arranged U-shaped hoops are installed above and below the groove plates.

[0008] Preferably, a plurality of positioning columns are fixed to the upper surface of the caisson bottom plate, and positioning holes are provided at the bottom ends of the first enclosure and the second enclosure, and the positioning columns are inserted in the positioning holes, and a plurality of plug-in holes are provided at both end surfaces of the first enclosure and the second enclosure, and a plurality of positioning plug-in grooves are provided on the outer surfaces of the first enclosure and the second enclosure, and the axes at both ends of the positioning plug-in groove on the outer surface of the first enclosure coincide with the axes of the plug-in holes at the end of the second enclosure, and the axes at both ends of the positioning plug-in groove on the outer surface of the second enclosure coincide with the axes of the plug-in holes at the end of the first enclosure, and the two ends of the U-shaped hoop are welded to the outer wall of the caisson bottom plate, and vertical sealing grooves are provided on both end surfaces of the second enclosure, and vertical sealing strips are inlaid on the inner side of the vertical sealing grooves.

[0009] Preferably, a C-shaped reinforcing plug rod is clamped on the inner side of the positioning plug slot, and two ends of the C-shaped reinforcing plug rod pass through the two end portions of the positioning plug slot and are plugged into the plug holes corresponding to the ends of the positioning plug slot.

[0010] Preferably, the C-shaped reinforcing plug-in rods clamped in the positioning plug-in grooves on the outer surfaces of the first and second enclosures are flush with each other, and the positions of the C-shaped reinforcing plug-in rods clamped on the outer surfaces of the first and second enclosures are staggered up and down.

[0011] Preferably, reinforcement plug-in grooves are provided on the upper surfaces at both ends of the first enclosure and the second enclosure, and the two reinforcement plug-in grooves at the ends where the first enclosure and the adjacent second enclosure are fitted together form a U-shaped groove, and reinforcement plug-in rods are plugged into the inner sides of the two reinforcement plug-in grooves. The reinforcement plug-in rods are U-shaped, and the single-side length of the reinforcement plug-in rods is half of the height of the first enclosure and the second enclosure.

[0012] Preferably, the first enclosure and the second enclosure are fixed by welding, and the first enclosure and the second enclosure are welded and fixed to the surface of the caisson bottom plate, the trough plate is welded to the outer walls of the first enclosure and the second enclosure and the ends extend beyond the side edges of the first enclosure and the second enclosure, and one side edge of the U-shaped hoop is fixed to the outer walls of the first enclosure and the second enclosure.

[0013] Preferably, a sealing filling ring is installed between the bottom ends of the two first enclosures and the two second enclosures and the surface of the caisson bottom plate, and the sealing filling ring includes a lower sealing gasket, and the lower sealing gasket is fixed to the surface of the caisson bottom plate, an upper sealing ring is installed above the lower sealing gasket, and a filling air bag is installed between the upper sealing ring and the lower sealing gasket.

[0014] Preferably, the outer edge of the lower sealing gasket is bent upward at 90 degrees, and a square connecting sealing strip is provided between the bent outer edge of the lower sealing gasket and the filling airbag, and the square connecting sealing strip is fixed to the bottom surface of the upper sealing ring.

[0015] Preferably, the material of the trough plate is 8# channel steel, the material of the U-shaped hoop is C14 steel bar, and the vertical and horizontal spacings of the U-shaped hoop are 300 mm.

[0016] A method for using a steel plate caisson structure for construction, the method comprising the following steps:

[0017] S1: First, assemble the steel plate caisson structure. During assembly, fix the lower sealing gasket on the surface of the caisson bottom plate, then place the filling airbag on the surface of the lower sealing gasket, and then cover the upper sealing ring on the filling airbag and fix it. Then, align the positioning holes at the bottom ends of the first and second enclosures with the positioning columns on the surface of the caisson bottom plate. After the positioning columns are aligned with the positioning holes, connect the bottom ends of the first and second enclosures with the caisson bottom plate and press them tightly.

[0018] S2: Then the staff squeezes the ends of the first and second enclosures so that the reinforcement plug-in grooves at the ends of the first and second enclosures are smoothly aligned without position deviation. At this time, the two ends of the reinforcement plug-in rod are respectively inserted into the reinforcement plug-in grooves at the ends of the first and second enclosures, and the reinforcement plug-in rod is knocked downward with a tool so that the reinforcement plug-in rod is completely inserted into the reinforcement plug-in groove and the upper surface of the reinforcement plug-in rod is flush with the upper surfaces of the first and second enclosures;

[0019] S3: After the ends of the first enclosure and the second enclosure are connected using the reinforcing plug-in rod, the C-shaped reinforcing plug-in rod is passed through the middle of the U-shaped hoops linearly arranged on the outer walls of the first enclosure and the second enclosure, and the two ends of the C-shaped reinforcing plug-in rod are aligned with the two ends of the positioning plug-in slot. Then, the C-shaped reinforcing plug-in rod is clamped in the positioning plug-in slot, and the C-shaped reinforcing plug-in rod is knocked with a tool so that the C-shaped reinforcing plug-in rod is completely inserted into the positioning plug-in slot. At this time, the end of the C-shaped reinforcing plug-in rod will pass through the positioning plug-in slot and be plugged into the corresponding plug-in hole of this positioning plug-in slot. The two first enclosures and the two second enclosures are surrounded and reinforced by the C-shaped reinforcing plug-in rod to complete the assembly of the steel plate caisson structure;

[0020] S4: Then, use an excavator to dig a foundation pit at the construction site and dig to the bottom mark height of the cushion layer, put the assembled steel plate caisson structure into the foundation pit, and the center of the steel plate caisson structure is consistent with the center of the foundation pit. After the steel plate caisson structure is placed, open the steel stop valve installed on the inner side of the bottom end of the steel casing;

[0021] S5: After the copper stop valve is opened, the steel plate caisson structure will slowly sink into the water due to its own gravity. At this time, the groundwater passively enters the steel casing due to the sinking of the steel plate caisson structure and enters the inside of the steel plate caisson structure along the steel casing. As the groundwater enters the inside of the steel plate caisson structure, the gravity of the steel plate caisson structure increases until the edge of the steel plate caisson structure is 150mm higher than the groundwater level. At this time, the copper stop valve is closed;

[0022] S6: After the steel plate caisson is placed, use a truck pump to continuously pour C40P8 concrete around the outside of the steel plate caisson. During pouring, it is necessary to ensure that the pouring process is continuous, uniform and symmetrical. After the pouring is completed, the slope is leveled around the steel plate caisson structure. After the slope is leveled around the surroundings, the accumulated water in the caisson is pumped out. The U-shaped hoop located in the concrete plays a role in improving the pull-out resistance. After the pumping is completed, the cushion layer and waterproof layer are constructed.

[0023] 1. The present invention adopts a steel plate caisson structure composed of a caisson bottom plate, a first enclosure plate and a second enclosure plate that can be quickly assembled, so that groundwater in the sand and gravel formation can be quickly removed or treated, effectively solving the problem of difficult construction of the bottom plate caused by groundwater in the sand and gravel formation. At the same time, it is easy to process and manufacture on site, has a simple structure and low manufacturing cost, saves costs and improves work efficiency;

[0024] 2. After the first enclosure plate and the second enclosure plate are positioned and installed on the bottom plate of the caisson, the present invention can use the C-shaped reinforcement plug-in rod and the reinforcement plug-in rod to quickly lock the first enclosure plate and ensure that when the steel plate caisson structure is in use, the first enclosure plate and the second enclosure plate will not easily separate or expand outward, thereby improving the overall strength of the steel plate caisson structure. When a problem occurs at a certain place in the steel plate caisson structure, only the problematic part needs to be replaced, effectively reducing the replacement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the caisson bottom plate of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the quick-install caisson coaming of the present invention;

[0028] Figure 4 For the present invention Figure 3 A magnified view of the structure at center A;

[0029] Figure 5 For the present invention Figure 3 A magnified view of the structure at B in the middle;

[0030] Figure 6It is a schematic diagram of the partial structure of the first enclosure of the present invention;

[0031] Figure 7 It is a schematic diagram of the partial structure of the second enclosure of the present invention;

[0032] Figure 8 It is a partial cross-sectional schematic diagram of the sealing filling ring of the present invention;

[0033] Fig. 9 FIG. 2 is a schematic diagram of the structure of the second embodiment of the present invention.

[0034] In the figure: 1. caisson bottom plate; 2. groove plate; 3. U-shaped hoop; 4. quick-install caisson enclosure; 401. first enclosure; 402. second enclosure; 403. reinforcement plug-in rod; 404. C-shaped reinforcement plug-in rod; 405. plug-in hole; 406. reinforcement plug-in groove; 407. positioning hole; 408. positioning plug-in groove; 409. vertical sealing groove; 410. vertical sealing strip; 5. sealing filling ring; 501. upper sealing ring; 502. lower sealing gasket; 503. filling airbag; 504. square connecting sealing strip; 6. steel casing; 7. positioning column. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] First embodiment: Figure 1 and Figure 2As shown, a steel plate caisson structure for building construction comprises a caisson bottom plate 1, a steel casing 6 is fixed at the center of the upper surface of the caisson bottom plate 1, the steel casing 6 penetrates the caisson bottom plate 1 and the bottom end is flush with the bottom surface of the caisson bottom plate 1, a copper stop valve is installed on the inner side of the bottom end of the steel casing 6, and a quick-install caisson enclosure 4 is installed above the caisson bottom plate 1. The quick-install caisson enclosure 4 comprises two first enclosures 401 and two second enclosures 402, the two first enclosures 401 are parallel to each other, the two second enclosures 402 are parallel to each other, and after the ends of the first enclosure 401 and the second enclosure 402 are attached to each other, three groove plates 2 with equal spacing distributed up and down are fixed on the outer walls of the first enclosure 401 and the second enclosure 402, and a plurality of linearly arranged U-shaped hoops 3 are installed above and below the groove plates 2, and the two ends of the U-shaped hoops 3 are welded to the caisson On the outer wall of the base plate 1, vertical sealing grooves 409 are provided on both end faces of the second enclosure 402, and vertical sealing strips 410 are embedded in the inner side of the vertical sealing grooves 409. The vertical sealing strips 410 embedded in the vertical sealing grooves 409 can ensure the sealing between the ends of the two adjacent second enclosures 402 after splicing. A plurality of positioning columns 7 are fixed to the upper surface of the caisson base plate 1, and positioning holes 407 are provided at the bottom ends of the first enclosure 401 and the second enclosure 402. The positioning columns 7 are inserted into the positioning holes 407, and the groundwater in the foundation pit can be introduced into the steel plate caisson structure through the steel casing 6, so that the steel plate caisson structure can be smoothly sunk into the foundation pit, and the overall rigidity of the first enclosure 401 and the second enclosure 402 can be ensured by the groove plate 2 and the U-shaped hoop 3.

[0037] The material of the channel plate 2 is 8# channel steel, the material of the U-shaped hoop 3 is C14 steel bar, and the vertical and horizontal spacing of the U-shaped hoop 3 is 300mm.

[0038] like Figure 3-Figure 7As shown, a plurality of plug-in holes 405 are provided on both end faces of the first enclosure 401 and the second enclosure 402, and a plurality of positioning plug-in grooves 408 are provided on the outer surfaces of the first enclosure 401 and the second enclosure 402. The axes at both ends of the positioning plug-in groove 408 on the outer surface of the first enclosure 401 coincide with the axes of the plug-in holes 405 at the ends of the second enclosure 402, and the axes at both ends of the positioning plug-in groove 408 on the outer surface of the second enclosure 402 coincide with the axes of the plug-in holes 405 at the ends of the first enclosure 401. A C-shaped reinforcing plug-in rod 404 is clamped on the inner side of the positioning plug-in groove 408, and both ends of the C-shaped reinforcing plug-in rod 404 pass through the two end ends of the positioning plug-in groove 408 and are plugged into the corresponding plug-in holes 408 at the ends of the positioning plug-in groove 408. 5, the C-shaped reinforcing plug-in rods 404 clamped in the positioning plug-in grooves 408 on the outer surfaces of the first enclosure 401 and the second enclosure 402 are flush with each other, and the C-shaped reinforcing plug-in rods 404 clamped on the outer surfaces of the first enclosure 401 and the second enclosure 402 are staggered up and down. The first enclosure 401 and the second enclosure 402 can be reinforced and connected by the C-shaped reinforcing plug-in rods 404 that are parallel and staggered up and down on the outer surfaces of the first enclosure 401 and the second enclosure 402, and when the inner walls of the first enclosure 401 and the second enclosure 402 are subjected to force, the C-shaped reinforcing plug-in rods 404 can offset the force applied to the first enclosure 401 and the second enclosure 402, thereby preventing the first enclosure 401 and the second enclosure 402 from expanding outward after being subjected to force.

[0039] Reinforcement plug-in grooves 406 are provided on the upper surfaces of both ends of the first enclosure 401 and the second enclosure 402. The two reinforcement plug-in grooves 406 at the ends where the first enclosure 401 and the adjacent second enclosure 402 fit together form a U-shaped groove. Reinforcement plug-in rods 403 are inserted into the inner sides of the two reinforcement plug-in grooves 406. The shape of the reinforcement plug-in rods 403 is U-shaped. The single-side length of the reinforcement plug-in rods 403 is half of the height of the first enclosure 401 and the second enclosure 402. By inserting the reinforcement plug-in rods 403 into the reinforcement plug-in grooves 406 at the ends of the first enclosure 401 and the second enclosure 402, the ends where the first enclosure 401 and the second enclosure 402 fit together can be reinforced to avoid gaps at the ends of the first enclosure 401 and the second enclosure 402.

[0040] like Figure 2 and Figure 8As shown, a sealing filling ring 5 is installed between the bottom ends of the two first enclosures 401 and the two second enclosures 402 and the surface of the caisson bottom plate 1, and the sealing filling ring 5 includes a lower sealing gasket 502, the lower sealing gasket 502 is fixed on the surface of the caisson bottom plate 1, an upper sealing ring 501 is installed above the lower sealing gasket 502, and a filling airbag 503 is installed between the upper sealing ring 501 and the lower sealing gasket 502, and the outer edge of the lower sealing gasket 502 is bent upward at 90 degrees, and the bent outer edge of the lower sealing gasket 502 and the filling airbag 503 are connected. A square connecting sealing strip 504 is provided in between, and the square connecting sealing strip 504 is fixed on the bottom surface of the upper sealing ring 501. After the first enclosure 401, the second enclosure 402 and the caisson bottom plate 1 are assembled, the upper sealing ring 501, the lower sealing gasket 502, the filling air bag 503 and the square connecting sealing strip 504 are used to fill the gap between the first enclosure 401, the second enclosure 402 and the caisson bottom plate 1 to prevent the groundwater entering the steel plate caisson structure from flowing back along the gap between the first enclosure 401, the second enclosure 402 and the caisson bottom plate 1.

[0041] Second embodiment: Fig. 9 As shown, it includes a caisson bottom plate (1), characterized in that: a steel casing (6) is fixed at the center of the upper surface of the caisson bottom plate (1), the steel casing (6) passes through the caisson bottom plate (1) and the bottom end is flush with the bottom surface of the caisson bottom plate (1), a copper stop valve is installed on the inner side of the bottom end of the steel casing (6), and a quick-install caisson enclosure (4) is installed above the caisson bottom plate (1), and the quick-install caisson enclosure (4) includes two first enclosures (401) and two second enclosures (402), the two first enclosures (401) are parallel to each other, the two second enclosures (402) are parallel to each other, and the first enclosure (401) and the second enclosure (402) are parallel to each other. 02) After the ends are attached to each other, three groove plates (2) with equal spacing up and down are fixed on the outer walls of the first enclosure (401) and the second enclosure (402), and a plurality of linearly arranged U-shaped hoops (3) are installed on the upper and lower parts of the groove plates (2). The first enclosure 401 and the second enclosure 402 are fixed by welding. The first enclosure 401 and the second enclosure 402 are welded and fixed to the surface of the caisson bottom plate 1. The groove plates 2 are welded to the outer walls of the first enclosure 401 and the second enclosure 402, and the ends of the two ends extend beyond the side edges of the first enclosure 401 and the second enclosure 402. One side edge of the U-shaped hoop 3 is fixed to the outer walls of the first enclosure 401 and the second enclosure 402.

[0042] A method for using a first embodiment of a steel plate caisson structure for building construction comprises the following steps:

[0043] S1: First, assemble the steel plate caisson structure. During assembly, fix the lower sealing gasket 502 on the surface of the caisson bottom plate 1, then place the filling airbag 503 on the surface of the lower sealing gasket 502, and then cover the upper sealing ring 501 on the filling airbag 503 and fix it. Then, align the positioning holes 407 at the bottom ends of the first and second enclosures 401 and 402 with the positioning columns 7 on the surface of the caisson bottom plate 1. After the positioning columns 7 are aligned with the positioning holes 407, connect the bottom ends of the first and second enclosures 401 and 402 with the caisson bottom plate 1 and press them tightly.

[0044] S2: Then the staff squeezes the ends of the first enclosure 401 and the second enclosure 402, so that the reinforcement plug-in grooves 406 at the ends of the first enclosure 401 and the second enclosure 402 are smoothly aligned without position deviation. At this time, the two ends of the reinforcement plug-in rod 403 are respectively plugged into the reinforcement plug-in grooves 406 at the ends of the first enclosure 401 and the second enclosure 402, and the reinforcement plug-in rod 403 is knocked downward with a tool, so that the reinforcement plug-in rod 403 is completely inserted into the reinforcement plug-in groove 406 and the upper surface of the reinforcement plug-in rod 403 is flush with the upper surfaces of the first enclosure 401 and the second enclosure 402;

[0045] S3: After the ends of the first enclosure 401 and the second enclosure 402 are connected using the reinforcing plug-in rod 403, the C-shaped reinforcing plug-in rod 404 is passed through the middle of the U-shaped hoop 3 linearly arranged on the outer walls of the first enclosure 401 and the second enclosure 402, and the two ends of the C-shaped reinforcing plug-in rod 404 are aligned with the two ends of the positioning plug-in slot 408. Then, the C-shaped reinforcing plug-in rod 404 is clamped in the positioning plug-in slot 408, and the C-shaped reinforcing plug-in rod 404 is knocked with a tool so that the C-shaped reinforcing plug-in rod 404 completely enters the positioning plug-in slot 408. At this time, the end of the C-shaped reinforcing plug-in rod 404 will pass through the positioning plug-in slot 408 and be plugged into the plug-in hole 405 corresponding to this positioning plug-in slot 408. The two first enclosures 401 and the two second enclosures 402 are surrounded and reinforced by the C-shaped reinforcing plug-in rod 404 to complete the assembly of the steel plate caisson structure;

[0046] S4: Then, an excavator is used to dig a foundation pit at the construction site and dig to the bottom mark height of the cushion layer, and the assembled steel plate caisson structure is placed in the foundation pit, and the center of the steel plate caisson structure is consistent with the center of the foundation pit. After the steel plate caisson structure is placed, the steel stop valve installed on the inner side of the bottom end of the steel casing 6 is opened;

[0047] S5: After the copper stop valve is opened, the steel plate caisson structure will slowly sink into the water due to its own gravity. At this time, the groundwater passively enters the steel casing 6 due to the sinking of the steel plate caisson structure and enters the interior of the steel plate caisson structure along the steel casing 6. As the groundwater enters the interior of the steel plate caisson structure, the gravity of the steel plate caisson structure increases until the edge of the steel plate caisson structure is 150mm higher than the groundwater level. At this time, the copper stop valve is closed;

[0048] S6: After the steel plate caisson is placed, a car pump is used to continuously pour C40P8 concrete around the outside of the steel plate caisson. During the pouring process, it is necessary to ensure that the pouring process is continuous, uniform and symmetrical. After the pouring is completed, the slope is leveled around the steel plate caisson structure. After the slope is leveled around the surroundings, the accumulated water in the caisson is pumped out. The U-shaped hoop 3 located in the concrete plays a role in improving the pull-out resistance. After the pumping is completed, the cushion layer and waterproof layer are constructed.

[0049] A second embodiment of a method for using a steel plate caisson structure for construction includes the following steps:

[0050] S1: First, the ends of the two first panels 401 and the two second panels 402 are attached to each other, and the two first panels 401 and the two second panels 402 are welded and sealed using a welding tool, and then the two first panels 401 and the two second panels 402 are placed on the surface of the caisson bottom plate 1 and fixed;

[0051] S2: After the two first enclosures 401 and the two second enclosures 402 are fixed to the caisson bottom plate 1, the slot plate 2 is attached to the outer walls of the two first enclosures 401 and the two second enclosures 402, and the attached slot plate 2 is fixed, and it is ensured that the two ends of the slot plate 2 extend out of the ends of the two first enclosures 401 and the two second enclosures 402 by the same distance;

[0052] S3: Finally, one side of the U-shaped hoop 3 is attached to the outer walls of the two first enclosures 401 and the two second enclosures 402, and the position of the U-shaped hoop is located above and below the groove plate 2, and the U-shaped hoop is fixed by a welding fixing tool;

[0053] S4: Place the assembled steel plate caisson into the foundation pit at the construction site for subsequent processes.

[0054] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A steel plate caisson structure for building construction, comprising a caisson bottom plate (1), characterized in that: A steel casing (6) is fixed at the center of the upper surface of the caisson bottom plate (1), the steel casing (6) passes through the caisson bottom plate (1) and the bottom end is flush with the bottom surface of the caisson bottom plate (1), a copper stop valve is installed inside the bottom end of the steel casing (6), and a quick-install caisson enclosure (4) is installed above the caisson bottom plate (1); The quick-install caisson enclosure (4) comprises two first enclosures (401) and two second enclosures (402), the two first enclosures (401) are parallel to each other, the two second enclosures (402) are parallel to each other, after the ends of the first enclosure (401) and the second enclosure (402) are attached to each other, three groove plates (2) are fixed on the outer walls of the first enclosure (401) and the second enclosure (402) at equal intervals, and a plurality of linearly arranged U-shaped hoops (3) are installed on the upper and lower parts of the groove plates (2); A plurality of positioning posts (7) are fixed on the upper surface of the caisson bottom plate (1); positioning holes (407) are provided at the bottom ends of the first enclosure plate (401) and the second enclosure plate (402); the positioning posts (7) are inserted into the positioning holes (407); a plurality of plug-in holes (405) are provided at both end surfaces of the first enclosure plate (401) and the second enclosure plate (402); a plurality of positioning plug-in grooves (408) are provided on the outer surfaces of the first enclosure plate (401); The axes at both ends of the positioning plug-in groove (408) coincide with the axes of the plug-in hole (405) at the end of the second enclosure (402); the axes at both ends of the positioning plug-in groove (408) on the outer surface of the second enclosure (402) coincide with the axes of the plug-in hole (405) at the end of the first enclosure (401); the two ends of the U-shaped hoop (3) are welded to the outer wall of the caisson bottom plate (1); the end surfaces of both ends of the second enclosure (402) are provided with vertical sealing grooves (409); the inner side of the vertical sealing groove (409) is inlaid with a vertical sealing strip (410); A C-shaped reinforcing plug-in rod (404) is clamped on the inner side of the positioning plug-in slot (408), and two ends of the C-shaped reinforcing plug-in rod (404) pass through the two end portions of the positioning plug-in slot (408) and are plugged into the plug-in holes (405) corresponding to the ends of the positioning plug-in slot (408); The C-shaped reinforcing plug-in rods (404) clamped in the positioning plug-in grooves (408) on the outer surfaces of the first enclosure (401) and the second enclosure (402) are flush with each other, and the positions of the C-shaped reinforcing plug-in rods (404) clamped on the outer surfaces of the first enclosure (401) and the second enclosure (402) are staggered up and down; The first enclosure (401) and the second enclosure (402) can be reinforced and connected by C-shaped reinforcing plug-in rods (404) which are parallel to and staggered up and down on the outer surfaces of the first enclosure (401) and the second enclosure (402), and when the inner walls of the first enclosure (401) and the second enclosure (402) are subjected to force, the C-shaped reinforcing plug-in rods (404) can offset the force applied to the first enclosure (401) and the second enclosure (402), thereby preventing the first enclosure (401) and the second enclosure (402) from expanding outwards after being subjected to force; The upper surfaces of both ends of the first enclosure (401) and the second enclosure (402) are provided with reinforcement plug-in grooves (406); the two reinforcement plug-in grooves (406) at the ends of the first enclosure (401) and the adjacent second enclosure (402) that fit each other form a U-shaped groove; the inner sides of the two reinforcement plug-in grooves (406) are plugged with reinforcement plug-in rods (403); the shape of the reinforcement plug-in rods (403) is U-shaped; the single side length of the reinforcement plug-in rods (403) is half of the height of the first enclosure (401) and the second enclosure (402); A sealing filling ring (5) is installed between the bottom ends of the two first enclosures (401) and the two second enclosures (402) and the surface of the caisson bottom plate (1), the sealing filling ring (5) comprising a lower sealing gasket (502), the lower sealing gasket (502) being fixed on the surface of the caisson bottom plate (1), an upper sealing ring (501) being installed above the lower sealing gasket (502), and a filling air bag (503) being installed between the upper sealing ring (501) and the lower sealing gasket (502); The outer edge of the lower sealing gasket (502) is bent upward at ninety degrees, and a square connecting sealing strip (504) is provided between the bent outer edge of the lower sealing gasket (502) and the filling airbag (503), and the square connecting sealing strip (504) is fixed to the bottom surface of the upper sealing ring (501).

2. The steel plate caisson structure for construction according to claim 1, characterized in that: The first enclosure (401) and the second enclosure (402) are fixed by welding. The first enclosure (401) and the second enclosure (402) are welded and fixed on the surface of the caisson bottom plate (1). The groove plate (2) is welded on the outer wall of the first enclosure (401) and the second enclosure (402) and the ends thereof extend beyond the side edges of the first enclosure (401) and the second enclosure (402). One side edge of the U-shaped hoop (3) is fixed on the outer wall of the first enclosure (401) and the second enclosure (402).

3. The steel plate caisson structure for construction according to claim 1, characterized in that: The material of the channel plate (2) is 8# channel steel, the material of the U-shaped hoop (3) is C14 steel bar, and the vertical and horizontal spacings of the U-shaped hoop (3) are 300 mm.

4. A method for using the steel plate caisson structure for construction according to any one of claims 1 to 3, characterized in that: The method of use comprises the following steps: S1: First, assemble the steel plate caisson structure. During assembly, fix the lower sealing gasket (502) on the surface of the caisson bottom plate (1), then place the filling airbag (503) on the surface of the lower sealing gasket (502), and then cover the upper sealing ring (501) on the filling airbag (503) and fix it. Then, align the positioning holes (407) at the bottom ends of the first enclosure (401) and the second enclosure (402) with the positioning columns (7) on the surface of the caisson bottom plate (1). After the positioning columns (7) and the positioning holes (407) are aligned, connect the bottom ends of the first enclosure (401) and the second enclosure (402) with the caisson bottom plate (1) and press them tightly. S2: Subsequently, the staff squeezes the ends of the first enclosure (401) and the second enclosure (402) so that the reinforcement plug-in grooves (406) at the ends of the first enclosure (401) and the second enclosure (402) are smoothly aligned without position deviation. At this time, the two ends of the reinforcement plug-in rod (403) are respectively plugged into the reinforcement plug-in grooves (406) at the ends of the first enclosure (401) and the second enclosure (402), and the reinforcement plug-in rod (403) is knocked downward with a tool so that the reinforcement plug-in rod (403) is completely inserted into the reinforcement plug-in groove (406) and the upper surface of the reinforcement plug-in rod (403) is flush with the upper surface of the first enclosure (401) and the second enclosure (402); S3: After the ends of the first enclosure (401) and the second enclosure (402) are connected using the reinforcing plug-in rod (403), the C-shaped reinforcing plug-in rod (404) is passed through the middle of the U-shaped hoop (3) linearly arranged on the outer wall of the first enclosure (401) and the second enclosure (402), and the two ends of the C-shaped reinforcing plug-in rod (404) are aligned with the two ends of the positioning plug-in groove (408), and then the C-shaped reinforcing plug-in rod (404) is clamped in the positioning plug-in groove (408), and the workpiece is used to fix the C-shaped reinforcing plug-in rod (404) and the U-shaped hoop (3) is inserted into the first enclosure (401) and the second enclosure (402). The tool is used to knock the C-shaped reinforcement plug-in rod (404) so ​​that the C-shaped reinforcement plug-in rod (404) completely enters the positioning plug-in slot (408). At this time, the end of the C-shaped reinforcement plug-in rod (404) passes through the positioning plug-in slot (408) and is plugged into the plug-in hole (405) corresponding to the positioning plug-in slot (408). The C-shaped reinforcement plug-in rod (404) is used to surround and reinforce the two first enclosures (401) and the two second enclosures (402), thereby completing the assembly of the steel plate caisson structure; S4: Then, a foundation pit is dug out at the construction site using an excavator and dug to the bottom mark height of the cushion layer, and the assembled steel plate caisson structure is placed in the foundation pit, with the center of the steel plate caisson structure being consistent with the center of the foundation pit. After the steel plate caisson structure is placed, the steel stop valve installed on the inner side of the bottom end of the steel casing (6) is opened; S5: After the copper stop valve is opened, the steel plate caisson structure will slowly sink into the water due to its own gravity. At this time, groundwater passively enters the steel casing (6) due to the sinking of the steel plate caisson structure and enters the interior of the steel plate caisson structure along the steel casing (6). As the groundwater enters the interior of the steel plate caisson structure, the gravity of the steel plate caisson structure increases until the edge of the steel plate caisson structure is 150 mm higher than the groundwater level. At this time, the copper stop valve is closed; S6: After the steel plate caisson is placed, a truck pump is used to continuously pour C40P8 concrete around the outside of the steel plate caisson. During the pouring process, it is necessary to ensure that the pouring process is continuous, uniform and symmetrical around the four sides. After the pouring is completed, the slope is leveled around the steel plate caisson structure. After the slope is leveled around the four sides, the accumulated water in the caisson is pumped out. The U-shaped hoop (3) located in the concrete plays a role in improving the pull-out resistance. After the pumping is completed, the cushion layer and waterproof layer are constructed.

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