Waterproof construction structure for water gushing sealing bottom and bottom plate of water collecting pit of deep foundation pit

Abstract

The utility model relates to a deep foundation pit sump gushing bottom sealing and bottom plate waterproof construction structure, a sump is formed in the bottom of a sump, thick gravel is laid at the bottom of the sump, and the deep foundation pit sump gushing bottom sealing and bottom plate waterproof construction structure comprises a sleeve body, a sealing assembly, a water stopping assembly and a waterproof assembly. A plurality of through holes allowing water to penetrate through are formed in the end, located in the collecting pit, of the steel sleeve, geotechnical cloth wraps the end, located in the collecting pit, of the steel sleeve, and the sealing assembly is connected to the end, away from the collecting pit, of the steel sleeve; the waterproof assembly comprises a waterproof roll and a bottom plate, the waterproof roll is laid at the bottom of the sump, the bottom plate is located on the side, away from the bottom of the sump, of the waterproof roll, a pouring hole is formed in the position, close to the top of the steel sleeve, of the bottom plate, and a specific distance is reserved between the top of the steel sleeve and the top of the bottom plate. The construction method has the effects that the construction time can be shortened, the construction cost is low, and construction operation is simple.

Description

Technical Field

[0001] This application relates to the field of construction technology, and in particular to a construction structure for sealing the water gushing from a sump in a deep foundation pit and waterproofing the bottom slab. Background Technique

[0002] During the construction of deep foundation pit projects in water-rich areas, it is required that the groundwater level be lowered to at least 0.5 m below the foundation pit during construction, and the foundation pit bottom needs to be kept dry. However, during the construction of foundation pit projects with a large area and a high dewatering depth, due to the damage of individual dewatering wells or the local design of sumps at the foundation pit bottom, when the local excavation depth is large, the water gushing volume of the sump is large, and it is impossible to seal the bottom smoothly, or after forcibly sealing the bottom with concrete, the water accumulation above the cushion layer is serious, which affects the construction of waterproof coiled materials, and further affects the overall waterproof effect of the structural bottom slab.

[0003] In the related technology, when the groundwater level is relatively high and the foundation pit bottom elevation is below the groundwater level, a drainage method needs to be set up. Usually, sumps are excavated at the bottom of the foundation pit. After the large-area dewatering of the foundation pit bottom is completed, the sumps are often below the water line. The construction period of this local project is short. If the original scheme of opening multiple sumps around the foundation pit is still used, the construction cost is high and the construction time is long.

[0004] In view of the above related technology, if the original scheme of opening multiple sumps around the foundation pit is still used, the construction cost is high and the construction time is long. Therefore, there is an urgent need for a simple, easy-to-implement device with low construction cost to solve the problem of sealing the bottom of the sump in the case of water gushing and the construction problem of waterproof coiled materials for the bottom slab. Utility Model Content

[0005] In order to overcome the above technical problems, this application provides a construction structure for sealing the water gushing from a sump in a deep foundation pit and waterproofing the bottom slab.

[0006] The construction structure for sealing the water gushing from a sump in a deep foundation pit and waterproofing the bottom slab provided by this application adopts the following technical solution:

[0007] A construction structure for sealing the water gushing from a sump in a deep foundation pit and waterproofing the bottom slab. A sump is opened at the bottom of the sump, and thick gravel is laid at the bottom of the sump. It includes a casing body, a sealing component, a water-stop component and a waterproof component. The casing body includes a steel casing. One end of the steel casing extends into the sump. A plurality of through holes for water to pass through are opened at one end of the steel casing located in the sump. A geotextile is wrapped around one end of the steel casing located in the sump. The sealing component is connected to the end of the steel casing away from the sump, and the sealing component is used to seal the steel casing;

[0008] The water stop assembly includes a water stop ring which is sleeved on the steel casing and fixed thereto. The water stop ring can reduce the water gushing out between the steel casing and the side wall of the sump. The waterproof assembly includes a waterproof coiled material and a bottom plate. The waterproof coiled material is laid on the bottom of the sump and is laid upward along the wall of the steel casing to the bottom of the water stop ring. The bottom plate is located on the side of the waterproof coiled material away from the bottom of the sump and is connected to the steel casing. A pouring hole is provided at the top of the bottom plate close to the steel casing, and a specific spacing is reserved between the top of the steel casing and the top of the bottom plate.

[0009] By adopting the above technical solution, the steel casing is prefabricated in the factory in advance, and the water stop ring is fixed at the designated position of the steel casing. When the bottom of the sump needs to be sealed, first, a sump with a size of 600*600*600 is excavated at the bottom of the sump where dewatering is required. 10 cm thick gravel or medium-coarse sand is laid at the bottom of the sump. The steel casing is transported to the construction site. The geotextile is wrapped around one end of the steel casing provided with a through hole. The end of the steel casing provided with the through hole is inserted into the sump. The steel casing is moved to a suitable position, and the periphery of the steel casing is filled with gravel or medium-coarse sand. The water gushing out of the sump enters the steel casing through the through hole. A water pump is installed in the steel casing to pump water. After the water at the bottom of the pit is pumped dry and the base meets the design requirements, a concrete cushion is poured. Subsequently, the waterproof coiled material is laid on the bottom of the sump, and then the bottom plate is poured. The water pump in the steel casing continuously pumps water before the concrete of the bottom plate is poured. When the bottom plate reaches the design strength, the steel casing is sealed through a sealing assembly, and then the pouring hole of the bottom plate is immediately sealed with micro-expansion concrete, and then the next construction operation is carried out. Compared with the related technology, in this application, only the steel casing needs to be extended into the sump, and the water gushing out of the sump can enter the steel casing. By pumping water through the water pump, the construction of laying the waterproof coiled material and the waterproof protective layer of the bottom plate can be carried out while pumping the water in the sump out through the water pump, which can shorten the construction time, has low construction cost, simple construction operation, and pumping the water in the sump out is beneficial to improving the problems of high construction cost and long construction time.

[0010] Optionally, the steel casing includes a plurality of sleeves, and all of the plurality of sleeves are located in the sump and are distributed along the depth direction of the sump;

[0011] The casing body further includes a plurality of fixing members. A plurality of the fixing members are provided between adjacent two sleeves, and the fixing members are used to fix the adjacent two sleeves into the steel casing.

[0012] By adopting the above technical solution, first, move multiple sleeves to the construction site. When it is necessary to extend the steel casing into the sump, select an appropriate number of sleeves according to the construction requirements, splice the selected number of sleeves into a steel casing, fix adjacent two sleeves through a fixing member, then wrap the geotextile around one end of the steel casing away from the water stop ring. After that, extend the end of the steel casing wrapped with the geotextile into the sump, move the steel casing to a suitable position, fill the periphery of the steel casing with gravel or medium-coarse sand, and then proceed with the next construction step. By setting multiple sleeves, the length of the steel casing can be adjusted according to the construction requirements, which is convenient for construction and can thus adapt to different construction requirements.

[0013] Optionally, the fixing member is a magnet. A plurality of embedding grooves are formed on both sides of the sleeve. The plurality of embedding grooves on the same side of the sleeve are evenly distributed along the circumferential direction of the sleeve. The magnets correspond to the embedding grooves one by one, and the magnets are in interference fit with the embedding grooves. When adjacent two sleeves are spliced, the magnets on the adjacent two sleeves are magnetically attracted to each other.

[0014] By adopting the above technical solution, the sleeves are prefabricated in the factory in advance. When it is necessary to connect adjacent two sleeves, take out two sleeves at the same time, move one end of the two sleeves closer to each other until the two magnets are magnetically attracted to each other, and adjacent two sleeves can be connected. By setting the magnets, it is convenient to fix the two sleeves and convenient for personnel to operate.

[0015] Optionally, the casing body further includes a plurality of sealing members. One sealing member is provided between adjacent two sleeves. The sealing member is connected to one of the sleeves, and the sealing member is used to seal the connection between adjacent two sleeves.

[0016] By adopting the above technical solution, by setting the sealing members, it is convenient to seal the connection between adjacent two sleeves.

[0017] Optionally, the casing body further includes a filter screen. The filter screen is fixed to one end of the steel casing located in the sump, and the filter screen covers the outer surface of the through hole.

[0018] By adopting the above technical solution, extend the end of the steel casing provided with the through hole into the sump. At this time, the filter screen is located in the sump. By setting the filter screen, the water gushing out of the sump can be filtered to prevent impurities from entering the steel casing.

[0019] Optionally, the closing assembly includes a circumferential steel plate and a steel cover plate. The circumferential steel plate is sleeved on one end of the steel casing away from the sump, the circumferential steel plate is fixed to the steel casing, the steel cover plate is located on the side of the circumferential steel plate away from the sump, the steel cover plate fits with the circumferential steel plate, and the steel cover plate is fixed to the circumferential steel plate to be used for blocking the steel casing.

[0020] By adopting the above technical solution, after the steel casing is installed and the base meets the design requirements, the concrete cushion is poured, and then the waterproof coiled material and waterproof protective layer of the bottom plate are laid. Subsequently, after the bottom plate concrete is poured and reaches the design strength, the steel casing is closed by fixing the steel cover plate and the circumferential steel plate. By setting the fixing of the steel cover plate and the circumferential steel plate, it is convenient to block the steel casing.

[0021] Optionally, it further includes a positioning assembly. The positioning assembly is located on the side of the water stop ring close to the sump. The positioning assembly includes two arc plates, two fasteners and a plurality of positioning rods. The two arc plates are spliced into a ring. One of the arc plates is connected with a fastener at each end. The fastener is used to fix the two arc plates. Both of the arc plates are attached to the outer wall of the steel casing. The plurality of positioning rods are evenly distributed on the two arc plates. The positioning rods are inclined. The positioning rods are inclined downward from the steel casing to the bottom of the sump. The higher end of the positioning rod is fixed to the arc plate, and the other end is inserted into the bottom of the sump to position the steel casing.

[0022] By adopting the above technical solution, first, take out the steel casing and wrap the end of the steel casing with a through hole with geotextile. Subsequently, take out the two arc plates in the positioning assembly, attach the two arc plates to the outer wall of the steel casing, and fix the two arc plates with fasteners. Extend the end of the steel casing wrapped with geotextile into the sump. At this time, the positioning rods are inserted into the bottom of the sump to position the steel casing. During the process of filling with crushed stone or medium coarse sand, there is no need for personnel to hold the steel casing by hand.

[0023] Optionally, the water stop assembly further includes a water swelling ring. The water swelling ring is located on the side of the water stop ring close to the sump. The water swelling ring is sleeved on the steel casing. The water swelling ring is fixed to the steel casing. The water swelling ring contacts the water stop ring. The water swelling ring reduces the situation that the water gushing out of the sump gushes out through the outer wall of the steel casing.

[0024] By adopting the above technical solution, by setting the water swelling ring, it is beneficial to reduce the situation that the water gushing out of the sump gushes out through the outer wall of the steel casing.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. Compared with the related technology, in the present application, only the steel casing needs to be extended into the sump, and the water gushing out of the sump can enter the steel casing and be pumped out by a water pump. It is possible to construct the waterproof coiled material and waterproof protective layer of the bottom plate while pumping out the water in the sump by the water pump, which can shorten the construction time, has low construction cost, simple construction operation, and pumping out the water in the sump is beneficial to improving the problems of high construction cost and long construction time.

[0027] 2. By setting multiple sleeves, the length of the steel casing can be adjusted according to construction requirements, facilitating construction and thus adapting to different construction requirements;

[0028] 3. By setting the positioning component, it is convenient to position the steel casing, and during the process of filling with crushed stone or medium-coarse sand, there is no need for personnel to hold the steel casing by hand. Description of the Drawings

[0029] Figure 1 is the schematic diagram of the overall structure in this embodiment;

[0030] Figure 2 is the sectional view from the first perspective in this embodiment;

[0031] Figure 3 is the sectional view of the steel casing in this embodiment;

[0032] Figure 4 is Figure 3 the enlarged view of A in

[0033] Figure 5 is the schematic diagram of the structure of the positioning component in this embodiment;

[0034] Figure 6 is the sectional view from the second perspective in this embodiment.

[0035] Description of the reference numerals: 1. Casing body; 11. Steel casing; 111. Sleeve; 1111. Groove; 1112. Through hole; 1113. Geotextile; 12. Fixing member; 13. Sealing member; 14. Filter screen; 2. Enclosure component; 21. Circumferential steel plate; 22. Steel cover plate; 3. Waterstop component; 31. Waterstop ring; 32. Water-swellable ring; 4. Positioning component; 41. Arc plate; 42. Fastening member; 43. Positioning rod; 5. Waterproof component; 51. Waterproof coiled material; 511. Waterproof protective layer; 52. Bottom plate; 521. Pouring hole. Detailed Description of the Invention

[0036] The following further describes the present application in detail with reference to the Figures 1-6 drawings.

[0037] The embodiment of the present application discloses a construction structure for sealing water gushing from a sump in a deep foundation pit and waterproofing the bottom plate. Referring to Figure 1 and Figure 2 , a construction structure for sealing water gushing from a sump in a deep foundation pit and waterproofing the bottom plate includes a casing body 1, an enclosure component 2 and a waterstop component 3, and the enclosure component 2 and the waterstop component 3 are both arranged on the casing body 1.

[0038] Referring to Figure 2 , Figure 3 and Figure 4, a sump pit is provided at the bottom of the sump. In this embodiment, the sump pit is a rectangular pit, and the size of the sump pit is preferably 600*600*600, which is convenient for effective water collection and installation operations. The bottom of the sump pit is paved with 10 cm thick gravel or medium coarse sand to filter the gushing water; the casing body 1 includes a steel casing 11, a plurality of fixing members 12, a plurality of sealing members 13 and a filter screen 14. The steel casing 11 includes a plurality of sleeves 111. The number of sleeves 111 can be one, two or more, and the number of sleeves 111 is determined according to the actual situation. A plurality of sleeves 111 are all located in the sump pit, and a plurality of sleeves 111 are distributed along the depth direction of the sump pit. A plurality of grooves 1111 are provided on both sides of the sleeve 111. The plurality of grooves 1111 located on the same side of the sleeve 111 are evenly distributed along the circumferential direction of the sleeve 111. The fixing members 12 correspond to the grooves 1111 one by one. In this embodiment, the fixing member 12 is a magnet, and the magnet is located in the groove 1111 and is in interference fit with the groove 1111. When the sleeves 111 are spliced, the magnets on adjacent two sleeves 111 are magnetically attracted to each other to fix the adjacent two sleeves 111. A plurality of sleeves 111 are fixed into the steel casing 11. The bottom of the steel casing 11 is designed to be 0.5 m deeper than the bottom of the sump pit to ensure sufficient water collection depth.

[0039] Refer to Figure 3 and Figure 4 , a sealing member 13 is provided between adjacent two sleeves 111. In this embodiment, the sealing member 13 is a sealing ring. The sealing ring is located at the connection of adjacent two sleeves 111. The sealing ring is fixedly bonded to one of the sleeves 111. The sealing ring seals the connection of adjacent two sleeves 111; one end of the steel casing 11 can extend into the sump pit, and a through hole 1112 is provided on the outer wall of the sleeve 111 of the steel casing 11 located in the sump pit as a water collection hole. The filter screen 14 is located in the sump pit. The filter screen 14 is fixedly connected to the outer wall of the steel casing 11 by screws, and the filter screen 14 covers the outer surface of the water collection hole to prevent impurities from entering the steel casing 11. A geotextile 1113 is fixedly connected to the outer wall of the sleeve 111 of the steel casing 11 located in the sump pit by screws. The geotextile 1113 can wrap the opening part of the sleeve 111; the gap between the steel casing 11 and the sump pit is filled with gravel or medium coarse sand, which not only enhances the structural stability, but also helps the water to penetrate and gather; when the gushing water enters the steel casing 11, the water in the steel casing 11 is pumped dry by a water pump.

[0040] Refer to Figure 2 and Figure 3, the closing component 2 is located at the end of the steel casing 11 away from the sump. The closing component 2 includes a circumferential steel plate 21 and a steel cover plate 22. The circumferential steel plate 21 is sleeved on the outer wall of the steel casing 11, and the circumferential steel plate 21 is fixedly connected to the steel casing 11 by screws. The steel cover plate 22 is located on the side of the circumferential steel plate 21 away from the sump. The steel cover plate 22 fits with the circumferential steel plate 21, and the steel cover plate 22 is fixedly connected to the circumferential steel plate 21 by bolts for blocking the steel casing 11; the steel casing 11 is filled with medium coarse sand during use until the top of the steel casing 11, and then, the steel cover plate 22 is used to block the steel casing 11.

[0041] Refer to Figure 2 and Figure 3 , the water stop component 3 is located on the side of the steel casing 11 close to the circumferential steel plate 21. The water stop component 3 includes a water stop ring 31 and a water swelling ring 32. The water stop ring 31 is sleeved on the steel casing 11, and the water stop ring 31 is welded to the steel casing 11. A specific distance is left between the water stop ring 31 and the circumferential steel plate 21 according to the needs of the personnel. The diameter of the sleeve 111 is A500, and the width of the water stop ring 31 is designed to be 20 cm to enhance the water stop effect; the water swelling ring 32 is located on the side of the water stop ring 31 close to the sump. The water swelling ring 32 is sleeved on the steel casing 11, and the water swelling ring 32 is fixedly connected to the steel casing 11 by screws, and the water swelling ring 32 is in contact with the water stop ring 31. When the water in the sump flows through the steel casing 11 and the side wall of the sump, the water swelling ring 32 swells when it encounters water, which is beneficial to reducing the situation that the water gushing out of the sump gushes out through the outer wall of the steel casing 11.

[0042] Refer to Figure 5 and Figure 6 , a deep foundation pit sump water gushing bottom sealing and floor waterproofing construction structure further includes a positioning component 4 and a waterproof component 5. The positioning component 4 is connected to the casing body 1, and the waterproof component 5 is arranged on the casing body 1.

[0043] Refer to Figure 5 , the positioning component 4 is located on the side of the water stop ring 31 close to the sump. The positioning component 4 includes two arc plates 41, two fasteners 42 and a plurality of positioning rods 43. The openings of the two arc plates 41 face each other. The two arc plates 41 are spliced into a ring. One of the arc plates 41 is connected with a fastener 42 at each end. In this embodiment, the fastener 42 is a screw. The screw passes through the two arc plates 41 in sequence, and the screw is threadedly connected to the two arc plates 41 in sequence. The two arc plates 41 are fixedly connected by screws. Both of the two arc plates 41 are attached to the outer wall of the steel casing 11. The plurality of positioning rods 43 are evenly distributed on the two arc plates 41. In this embodiment, the number of the positioning rods 43 is four, and two positioning rods 43 are connected to each arc plate 41. The positioning rods 43 are inclined. The positioning rods 43 are inclined downward from the steel casing 11 to the bottom of the sump. The higher end of the positioning rod 43 is welded to the arc plate 41, and the other end is inserted into the bottom of the sump for positioning the steel casing 11.

[0044] Refer to Figure 6 Figure 6 , the waterproof component 5 includes a waterproof coiled material 51 and a bottom plate 52. The waterproof coiled material 51 is laid on the bottom of the sump. The waterproof coiled material 51 is laid upward along the wall of the steel casing 11 to the bottom of the water stop ring 31. One side of the waterproof coiled material 51 close to the sleeve 111 is fixedly bonded to the outer wall of the sleeve 111. A waterproof protective layer 511 is provided on one side of the waterproof coiled material 51 away from the bottom of the sump. The waterproof protective layer 511 is 5 cm thick. The material of the waterproof protective layer 511 is preferably C20 fine aggregate concrete. The bottom plate 52 is located on one side of the waterproof coiled material 51 away from the bottom of the sump. The bottom plate 52 is formed by pouring concrete. A pouring hole 521 is provided at the top of the bottom plate 52 close to the steel casing 11. A space of 0.25 m is reserved between the top of the steel casing 11 and the top of the bottom plate 52 for subsequent construction operations. The pouring hole 521 is later poured with slightly expanded waterproof concrete with a strength grade one higher than the designed concrete grade of the bottom plate 52.

[0045] The implementation principle of the deep foundation pit sump water gushing bottom sealing and bottom plate waterproof construction structure in the embodiment of the present application is as follows: The sleeve 111 is prefabricated in the factory in advance. When the bottom sealing of the sump is required, first, a sump with a size of 600*600*600 is excavated at the bottom of the sump to be dewatered. 10 cm thick gravel or medium-coarse sand is laid at the bottom of the sump. The appropriate number of sleeves 111 is selected according to the construction requirements, and the selected number of sleeves 111 is spliced into the steel casing 11. One end of the steel casing 11 not connected to the closing component 2 is wrapped with geotextile 1113. Two arc plates 41 in the positioning component 4 are taken out, and the two arc plates 41 are attached to the outer wall of the steel casing 11 and fixed. The end of the steel casing 11 wrapped with geotextile 1113 is extended into the sump. At this time, the positioning rod 43 is inserted into the bottom of the sump to position the steel casing 11, and the periphery of the steel casing 11 is filled with gravel or medium-coarse sand; a water pump is installed in the steel casing 11 to pump water. After the water at the bottom of the pit is pumped dry and the base meets the design requirements, a concrete cushion is poured; the construction of the waterproof coiled material 51 and the waterproof protective layer 511 of the bottom plate 52 is carried out; the steel bars of the sump bottom plate 52 are tied; the concrete of the bottom plate 52 is poured, and the water pump in the steel casing 11 continuously pumps water before the concrete pouring of the bottom plate 52 is completed; after the concrete pouring of the bottom plate 52 is completed and reaches the design strength, the steel casing 11 is closed by fixing the steel cover plate 22 and the circumferential steel plate 21, and then the pouring hole 521 of the bottom plate 52 is immediately poured with slightly expanded concrete to seal it.

[0046] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A deep foundation pit sump water gushing bottom sealing and bottom plate waterproofing construction structure, a sump is opened at the bottom of the sump, and thick crushed stones are laid at the bottom of the sump, characterized in that: The invention comprises a casing body (1), a sealing component (2), a water-stop component (3) and a waterproof component (5), wherein the casing body (1) comprises a steel casing (11), one end of the steel casing (11) extends into a collection pit, one end of the steel casing (11) located in the collection pit is provided with a plurality of through holes (1112) for water to pass through, one end of the steel casing (11) located in the collection pit is wrapped with a geotextile (1113), the sealing component (2) is connected to the end of the steel casing (11) away from the collection pit, and the sealing component (2) is used to seal the steel casing (11); The water stop assembly (3) comprises a water stop ring (31), the water stop ring (31) is sleeved on the steel casing (11), the water stop ring (31) is fixed to the steel casing (11), the water stop ring (31) can reduce the water flowing out between the steel casing (11) and the side wall of the sump, the waterproof assembly (5) comprises a waterproof roll (51) and a bottom plate (52), the waterproof roll (51) is laid on the bottom of the sump, the waterproof roll (51) is laid upward along the wall of the steel casing (11) to the bottom of the water stop ring (31), the bottom plate (52) is located on the side of the waterproof roll (51) away from the bottom of the sump, the bottom plate (52) is connected to the steel casing (11), the bottom plate (52) is provided with a casting hole (521) near the top of the steel casing (11), and a specific distance is retained between the top of the steel casing (11) and the top of the bottom plate (52).

2. A deep foundation pit sump water gushing bottom sealing and bottom plate waterproof construction structure according to claim 1, characterized in that: The steel casing (11) comprises a plurality of sleeves (111), the plurality of sleeves (111) are all located in the sump, and the plurality of sleeves (111) are distributed along the depth direction of the sump; The casing body (1) further comprises a plurality of fixing members (12), two adjacent casings (111) are provided with the plurality of fixing members (12), and the fixing members (12) are used to fix the two adjacent casings (111) into the steel casing (11).

3. A deep foundation pit sump water gushing bottom sealing and bottom plate waterproof construction structure according to claim 2, characterized in that: The fixing member (12) is a magnet. A plurality of embedding grooves (1111) are provided on both sides of the sleeve (111). The plurality of embedding grooves (1111) located on the same side of the sleeve (111) are evenly distributed along the circumference of the sleeve (111). The magnets correspond to the embedding grooves (1111) one by one. The magnets are interference fit with the embedding grooves (1111). When two adjacent sleeves (111) are spliced, the magnets on the two adjacent sleeves (111) are attracted to each other.

4. A deep foundation pit sump water gushing bottom sealing and bottom plate waterproof construction structure according to claim 2, characterized in that: The sleeve body (1) further comprises a plurality of seals (13), wherein a seal (13) is provided between two adjacent sleeves (111), the seal (13) is connected to one of the sleeves (111), and the seal (13) is used to seal the connection between the two adjacent sleeves (111).

5. The deep foundation pit sump water gushing bottom sealing and bottom plate waterproof construction structure according to claim 1, characterized in that: The casing body (1) further comprises a filter screen (14), wherein the filter screen (14) is fixed to one end of the steel casing (11) located in the collection pit, and the filter screen (14) covers the outer surface of the through hole (1112).

6. A deep foundation pit sump water gushing bottom sealing and bottom plate waterproof construction structure according to any one of claims 1 to 5, characterized in that: The sealing assembly (2) comprises an annular steel plate (21) and a steel cover plate (22); the annular steel plate (21) is sleeved on the end of the steel casing (11) away from the collection pit; the annular steel plate (21) is fixed to the steel casing (11); the steel cover plate (22) is located on the side of the annular steel plate (21) away from the collection pit; the steel cover plate (22) fits with the annular steel plate (21); the steel cover plate (22) is fixed to the annular steel plate (21) to seal the steel casing (11).

7. A deep foundation pit sump water gushing bottom sealing and bottom plate waterproof construction structure according to claim 6, characterized in that: The invention also comprises a positioning assembly (4), wherein the positioning assembly (4) is located on the side of the water stop ring (31) close to the collection pit, and the positioning assembly (4) comprises two arc plates (41), two fasteners (42) and a plurality of positioning rods (43). The two arc plates (41) are spliced ​​into a circular ring, and one of the two ends of one of the arc plates (41) is connected to a fastener (42), and the fastener (42) is used to fix the two arc plates (41). The two arc plates (41) are both in contact with the outer wall of the steel casing (11). The plurality of positioning rods (43) are evenly distributed on the two arc plates (41). The positioning rods (43) are arranged obliquely, and the positioning rods (43) are arranged obliquely downward from the steel casing (11) to the bottom of the collection pit. The higher end of the positioning rod (43) is fixed to the arc plate (41), and the other end is plugged into the bottom of the collection pit so as to position the steel casing (11).

8. The deep foundation pit sump water gushing bottom sealing and bottom plate waterproof construction structure according to claim 1, characterized in that: The water-stop assembly (3) further comprises a water-expandable ring (32), the water-expandable ring (32) being located on a side of the water-stop ring (31) close to the collection pit, the water-expandable ring (32) being sleeved on the steel casing (11), the water-expandable ring (32) being fixed to the steel casing (11), the water-expandable ring (32) being in contact with the water-stop ring (31), and the water-expandable ring (32) reducing the water gushing out of the collection pit from the outer wall of the steel casing (11).

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