CN112392069A - Water pressure control system of underground space structure and construction method - Google Patents

Abstract

The invention relates to a water pressure control system of an underground space structure and a construction method thereof, which comprises a water collecting well, a sedimentation tank and a foundation slab covering the periphery of a wellhead of the water collecting well, and is characterized in that: one side in the sump pit is equipped with a plurality of water pressure control system, water pressure control system includes filter unit, water collection unit and drainage unit, is equipped with filter unit in water collection unit's collector pipe outside, and water collection unit's collector pipe one end intercommunication drainage unit. The advantages are that: underground water pressure in the underground space can be sensed, regulated and controlled and excreted in real time through the water pressure control system, the underground space structure is guaranteed not to work in an overload mode, the underground space structure in the building is prevented from being seriously damaged and potential safety hazards are avoided, and safe use of the building structure is guaranteed. The water pressure control system of the underground space structure is applicable to all underground space structures, and has wide application range.

Description

Water pressure control system of underground space structure and construction method

Technical Field

The invention belongs to the technical field of building construction, and particularly relates to a water pressure control system of an underground space structure and a construction method.

Background

At present, as civil and public buildings have increasingly complex underground space structures, the depth of the underground space structures is gradually increased. Because underground space structures in residential buildings are mostly used in underground parking lots, storage rooms and the like, the requirement on space is high. In the structure design process at the present stage, only the specification requirement factors are usually considered, and the following situations are ignored, for example, especially in areas with heavy rain, short rainstorm or serious low-lying water storage and high ground water level, the water level sudden change can greatly cause the change of water pressure, and the serious situations can seriously damage the bottom plate, the frame column and the like of the underground space structure, such as: the conditions of base bottom plate protrusion, cracking, frame column root, column top crushing and the like are serious, and the whole building can be collapsed due to serious conditions.

Disclosure of Invention

The invention provides a water pressure control system of an underground space structure and a construction method thereof, which can sense, regulate and discharge underground water pressure in real time and avoid the serious damage of the underground space structure in a building and the occurrence of potential safety hazards.

The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows:

underground space structure water pressure control system, including sump pit, sedimentation tank and cover at sump pit well head foundation plate all around, its characterized in that: one side in the sump pit is equipped with a plurality of water pressure control system, water pressure control system includes filter unit, water collection unit and drainage unit, is equipped with filter unit in water collection unit's collector pipe outside, and water collection unit's collector pipe one end intercommunication drainage unit.

The invention can also adopt the following technical scheme:

preferably, the filtering unit comprises a dense mesh net, a pebble filtering layer and a gravel filtering layer which are arranged below the foundation slab, a reinforcing steel bar net enclosure is arranged between the pebble filtering layer and the gravel filtering layer, a perforated cement pipe fixedly connected with the brick moulding bed is arranged in the gravel filtering layer on the inner side of the reinforcing steel bar net enclosure, a reinforcing steel bar net piece is arranged on the outer wall of the perforated cement pipe, the reinforcing steel bar net piece is fixed through a reinforcing steel bar sealing frame, and a plurality of water holes are formed in the pipe wall of the perforated cement pipe.

Preferably, the water collecting unit comprises a water collecting pipe, a pressure relief box, a water stop ring and a water diversion pipe, the water collecting pipe is arranged at the middle position in the porous cement pipe of the filtering unit and penetrates through the brick molding bed and the foundation slab to be communicated with the pressure relief box arranged in the water collecting well, the other end of the pressure relief box is communicated with the water diversion pipe, and the water stop ring is further arranged on the water collecting pipe.

Preferably, the pressure release box includes box body, spring, rubber buffer, spring coupling pole, steel connecting plate, steel connecting pipe and steel connection pad, be equipped with four at least springs in the box body, the curb plate rigid coupling of spring coupling pole and bolt and box body is passed through to spring coupling pole one end, and it is fixed with the steel connecting plate that the other end passes through the spring coupling pole, steel connecting plate opposite side is equipped with rubber buffer and valve port board and is fixed with the steel connecting plate through the bolt, open at valve port board middle part has the round hole, and the round hole system has the wedge incision, opens at the both sides board middle part of box body has the round hole concentric with valve port board round hole, and steel connecting pipe and steel connection pad rigid coupling.

Preferably, the drainage unit comprises a water pump and a drainage pipe, and the drainage pipe is connected with the underground space structure pipeline embedded part and is communicated with a municipal pipeline outside the underground space structure pipeline embedded part.

A construction method of a water pressure control system of an underground space structure is characterized in that: the method comprises the following steps:

s1, processing components of the on-site water pressure control system according to a design drawing and the size of a water collecting well according to the specific structure of the water collecting well on the construction site, and processing a water collecting pipe, a water guiding pipe, a pressure relief box, a steel bar mesh enclosure and a steel bar sealing frame;

A. the water collecting pipe is made of a steel pipe, the pipe diameter can be selected according to underground water and rainfall conditions of the site of the project, generally 10CM is selected, a strip-shaped hole is formed in the axial direction of the embedding section of the water collecting pipe, the width of the strip-shaped hole is larger than 2CM, the length and the structural style of the embedding section are designed according to the water collecting quantity requirement, a water stop ring is welded at the joint of the water collecting pipe and the wall of the water collecting pit, a steel connecting disc is welded at the end part of the water collecting pipe, and the water collecting pipe is coated with;

B. the water pipe is made of steel pipes, the whole shape of the water pipe is L-shaped, the length of a vertical section of the water pipe is set according to the depth of a water collecting well, a steel connecting disc is welded at the end part of a straight section of the water pipe and is connected with the vertical section in a welding way, and the water pipe is coated with an anticorrosive material;

C. the pressure relief box body is made of a steel plate with the strength grade of Q235, the thickness of the steel plate is not smaller than 5mm, batch cutting and punching are performed on the steel plate according to a design drawing and the size, circular holes are formed in the middle of the two side plates, the diameter of each circular hole is not smaller than 10CM, one end of each rubber plug is made into a wedge shape, holes are formed in the middle of each rubber plug, the circular holes in the middle of the valve port plate are made into wedge-shaped notches, and the diameter of each notch is matched with the corresponding rubber plug and a certain margin is reserved; the valve port plate is fixedly connected with the rubber plug and a steel connecting plate through bolts, the steel connecting plate is a circular plate, 4 spring connecting rods are uniformly welded on one side of the steel connecting plate, the spring connecting rods are welded at the end part of the other side plate of the box body, two ends of a spring are respectively connected with the spring connecting rods, steel connecting pipes are fixedly connected on the outer sides of two side plates of the box body respectively, a steel connecting plate is fixedly connected at the end part of the steel connecting pipe, and finally, an;

D. the steel bar mesh enclosure is composed of an L-shaped steel bar framework and a steel bar mesh, wherein the vertical section of the L-shaped steel bar framework is bound on the steel bar mesh, and the flat section is a free section; the height of the vertical section is consistent with the thickness of the gravel filter layer, the straight section meets the erection structural requirement, the L-shaped steel bar frameworks are uniformly arranged on the steel bar mesh sheet, the spacing meets the erection requirement, the diameter of the L-shaped steel bar frameworks meets the erection requirement, and the steel bar mesh can be cut automatically according to the requirement to meet the structural requirement;

E. the reinforcing steel bar sealing frame is formed by welding 2 longitudinal reinforcing steel bars and 2 transverse reinforcing steel bars respectively, and the end part of the reinforcing steel bar sealing frame is bent, wherein the bending interval of the reinforcing steel bar sealing frame meets the structural requirement of buckling the reinforcing steel bar sealing frame on the cement pipe with holes;

s2 excavation of foundation pit

Excavating a foundation pit according to the positioning line, and performing outward expansion and deepening treatment on the position of the water collecting well, wherein the outward expansion range is not smaller than the laying range of the filtering unit;

s3 mould for building bricks

The building process of the brick forming die is basically the same as that of the conventional method, the thickness of the forming die plate is more than 380mm, the building is suspended until the position of the cement pipe with holes is built, and the building is continued to the elevation position after the cement pipe with holes and the water collecting pipe are installed;

s4 laying pebble filter layer

Selecting pebbles with the diameter larger than 10CM, starting to lay a pebble filter layer when the strength of brick moulding bed mortar in the pebble laying height range reaches 100%, stopping laying until the position of about 1/2 of the lower skin of the perforated cement pipe, continuing to lay the pebbles layer by layer after the reinforcing bar net enclosure is installed and gravels with a certain thickness are laid, wherein the laying thickness is determined according to the anti-lateral pressure of the reinforcing bar net enclosure until the position of 10CM of the lower skin of the base bottom plate cushion layer, and installing the perforated cement pipe and the water collecting pipe;

s5, installing reinforcing mesh enclosure

Erecting the manufactured steel bar mesh enclosure along the boundary position of the pebble filter layer and the broken stone filter layer, wherein the whole steel bar mesh enclosure is annular, the tail end of the steel bar mesh enclosure is attached to and fixed with a brick moulding bed, the straight section of the L-shaped steel bar framework faces one side of the cement pipe with holes and is firmly pressed by broken stones to prevent toppling, and the lower part of the other side of the steel bar mesh enclosure is firmly pressed by pebbles;

s6 laying gravel filter layer

Selecting gravels with the diameter larger than 3CM, starting to lay the gravels in layers after the steel bar net enclosure is installed in place, wherein the laying thickness is determined according to the lateral pressure resistance of the steel bar net enclosure, pausing when the gravel is laid to the installation position of the cement pipe with holes, continuing to lay the gravel until the cushion layer lower skin of the foundation slab is within 10CM after the cement pipe with holes and the water collecting pipe are installed and the rest brick moulding beds are built to reach the construction strength;

s7, mounting the cement pipe with the hole and the water collecting pipe

At least wrapping 3 layers of perforated cement pipes by using a steel bar net piece, then installing one end of each perforated cement pipe perpendicular to the side surface of a brick moulding bed and ensuring that the end part of each perforated cement pipe is attached to the brick moulding bed, tightly fastening the other end of each perforated cement pipe by using a steel bar sealing frame and wrapping the other end of each perforated cement pipe by using at least 3 layers of steel wire meshes, covering and positioning by using a small amount of gravel, then starting to install a water collecting pipe, arranging one section of a water filtering hole of the water collecting pipe at the central position in the perforated cement pipe, installing a water stopping ring on the other section of the water collecting pipe, enabling the water stopping ring to be positioned at the central line position of the side wall of a water collecting well, enabling the water collecting pipe to penetrate through the brick moulding bed and be connected with a pressure relief;

s8 laying dense mesh net

Covering the dense mesh net on the upper parts of the pebble filter layer and the gravel filter layer, wherein the coverage range is larger than 40CM of the outer boundary of the pebble filter layer, the downward burial depth of one side close to the brick molding bed along the outer side wall of the brick molding bed is not less than 20CM, and the thickness is 10CM +/-;

s9, erecting a formwork and pouring concrete

Reserving holes in the template in advance, tightly plugging after penetrating through the water collecting pipe, and pouring concrete according to design requirements;

s10, mounting pressure relief box and water conduit

Connecting the processed pressure relief box to a steel connecting disc at the end part of a water collecting pipe through a bolt, placing a rubber ring between the steel connecting discs for sealing, and connecting the other end of the pressure relief box to a water diversion pipe through the steel connecting disc;

s11, mounting water pump and drain pipe

And selecting a water pump, a float switch and a drain pipe which are matched in power, connecting the drain pipe with an underground space structure pipeline embedded part, and communicating the drain pipe with an external municipal pipeline.

The invention has the advantages and positive effects that: by adopting the technical scheme, namely the water pressure control system is arranged in the water collecting well, the pressure of the pressure relief valve can be adjusted according to the maximum water pressure which can be borne by underground space structures of different projects, and the pressure relief valve is closed in time after the water pressure is reduced to a safe range, so that the overlarge water pressure can be controlled, and the condition of long-term running water can be avoided. The filtering unit is installed in the underground space structure water pressure control system, and by means of measures of paving the pebble filtering layer, the gravel filtering layer, wrapping the reinforcing mesh sheet on the cement pipe with the hole, paving the dense mesh net on the upper part of the filtering layer and the like, not only can sediment and sundries of underground water be effectively filtered, but also concrete aggregate and cement paste are reduced to flow, so that the filtering unit and the water collecting pipe are prevented from being blocked by the gravel, the service life of the system is prolonged, and the water collecting effect is ensured. The water collecting pipe is arranged in the cement pipe with the hole, so that the wind direction blocked by the water collecting hole can be reduced, enough operation space can be reserved for replacing the water collecting pipe after long-term use, and the integrity of the filtering unit can be effectively ensured. The water pump is opened and closed by a pressure relief box and a water pump with a float switch according to the liquid level in the water collecting well, when the water pressure reaches a set value, a spring compression piston is opened, underground water is discharged into the water collecting well through a water conduit, after simple precipitation, the liquid level reaches a certain position, a water pump float switch of a water discharging unit is closed, and water is discharged into a municipal rainwater pipeline through a water discharging pipe to prevent overflow; fully reduce groundwater pressure, guarantee that underground space structure can not overload work, ensure building structure's safe handling. The water pressure control system of the underground space structure is applicable to all underground space structures, and has wide application range.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of section I of FIG. 1;

FIG. 3 is a schematic view of the internal structure of the pressure relief box of the present invention;

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is a sectional view A-A of FIG. 3;

FIG. 6 is a cross-sectional view B-B of FIG. 3;

FIG. 7 is a cross-sectional view C-C of FIG. 3;

FIG. 8 is a view showing an assembly structure of the reinforcing bar sealing frame and the cement pipe with holes according to the present invention;

FIG. 9 is a right side view of FIG. 8;

FIG. 10 is a view showing the assembled structure of the water collecting pipe and the water stop ring according to the present invention;

FIG. 11 is a left side view of FIG. 10;

fig. 12 is a right side view of fig. 10.

In the figure: 1. a foundation slab; 2. a water collecting well; 3. a sedimentation tank; 4. a filtration unit; 401. a dense mesh net; 402. a pebble filtering layer; 403. a gravel filter layer; 404. reinforcing mesh sheets; 405. a reinforcing steel bar sealing frame; 406. a steel mesh enclosure; 407. cushion blocks; 408. a cement pipe with a hole; 5. a water collection unit; 501. a water collection pipe; 5011. a strip-shaped hole; 502. a pressure relief box; 5021. a box body; 5022. a spring; 5023. a rubber plug; 5024. a spring connecting rod; 5025. a steel connecting plate; 5026. a bolt; 5027. a valve port plate; 5028. a steel connecting disc; 5029. a steel connecting pipe; 503. a water stop ring; 504. a water conduit; 6. a drainage unit; 601. a water pump; 602. a drain pipe; 7. a brick molding bed; 8. municipal pipeline.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to figures 1-12 of the drawings,

underground space structure water pressure control system, including sump pit 2, sedimentation tank 3 and cover foundation plate 1 around the sump pit well head, one side is equipped with a plurality of water pressure control system side by side in the sump pit, water pressure control system includes filter unit 4, water collection unit 5 and drainage unit 6, is equipped with filter unit in the collector pipe 501 outside of water collection unit, and the collector pipe one end intercommunication drainage unit of water collection unit, drainage unit's drain pipe and outside municipal pipeline 8 intercommunication.

In order to reduce the mud content and other impurities of the introduced underground water and prevent the water collecting pipe from being blocked, a filtering unit is arranged around the water collecting pipe, the filtering unit consists of a pebble filtering layer, a reinforcing mesh enclosure, a gravel filtering layer, a cement pipe with holes, a reinforcing mesh sheet, a reinforcing bar sealing frame and a dense mesh net, and the pebble filtering layer is positioned at the outermost side.

Specifically, the filtering unit 4 includes a dense mesh net 401, a pebble filtering layer 402 and a gravel filtering layer 403 which are arranged below the foundation slab, a reinforcing mesh enclosure 406 is arranged between the pebble filtering layer and the gravel filtering layer, a perforated cement pipe 408 fixedly connected with the brick mould 7 is arranged in the gravel filtering layer positioned on the inner side of the reinforcing mesh enclosure, a reinforcing mesh sheet 404 is arranged on the outer wall of the perforated cement pipe, the reinforcing mesh sheet is fixed by a reinforcing seal frame 405, and a plurality of water holes are formed in the pipe wall of the perforated cement pipe.

Specifically, the pebble filter layer is made of pebbles with the diameter larger than 10CM, the pebble filter layer starts to be laid after the mortar strength of the brick bed mould 7 within the pebble laying height range reaches 100%, the pebble filter layer is laid until the position of about 1/2 below the perforated cement pipe 408, the pebbles are continuously laid in layers after the reinforcing bar net enclosure 406 is installed and crushed stones with a certain thickness are laid, the laying thickness of the pebble filter layer is determined according to the lateral pressure resistance of the reinforcing bar net enclosure, and the pebble filter layer is ensured not to have obvious bulging and inclination until the position of 10CM below the cushion layer of the foundation slab 1.

Specifically, the gravel filter layer 403 is made of gravel with a diameter larger than 3CM, the gravel is laid in layers after the steel bar mesh enclosure is installed in place, and the laying thickness is determined according to the lateral pressure resistance of the steel bar mesh enclosure, so that the steel bar mesh enclosure is ensured not to have obvious bulging or inclination. And when the cement pipes with holes are paved to the installation position of the cement pipes with holes and the water collecting pipes are suspended, the paving is continued until the residual brick moulding beds are built to reach the construction strength until the lower skin of the cushion layer of the foundation slab 1 is within 10 CM.

Concretely, wrap up 3 layers with reinforcing bar net piece 404 at least with foraminiferous cement pipe 408's the outside, foraminiferous cement pipe perpendicular to mould for brick mould side-mounting just guarantees the tip and can laminate with the mould for brick mould, and the other end seals the straining and wraps up with 3 layers above wire net pieces with the reinforcing bar and good, and the reuse is a small amount of broken stones and is covered and begin to install collector pipe 501 after the location, the collector pipe is located to have a plurality of bar holes on burying the pipe wall of section underground, and the intraductal central point of foraminiferous cement is arranged in to the one end in collector pipe bar hole puts, can adopt steel bar support or cushion 407 to carry out assistance-localization real, guarantees the degree of accuracy. And a water stop ring 503 is arranged on the water collecting pipe, is positioned at the central line of the side wall of the water collecting well, is reinforced after positioning is finished, and builds the rest brick moulding bed. The gap between the water collecting pipe and the brick moulding bed is filled with masonry mortar, so that the phenomena of slurry leakage and reverse flow during concrete pouring are prevented, and the waterproof performance of the concrete is prevented from being influenced.

Specifically, the dense mesh net 401 covers the upper parts of the pebble filter layer and the gravel filter layer, the coverage range exceeds the outer boundary of the pebble filter layer by more than 40CM, the depth of the dense mesh net close to one side of the brick molding bed is not less than 20CM along the outer side wall of the brick molding bed, the thickness of the dense mesh net is controlled to be about 10CM, and the mesh number can be selected according to actual conditions. The concrete filter unit has the advantages that the concrete is prevented from blocking the filter unit when the concrete is poured, the dense mesh net can be replaced by a water filtering plate, a heat insulation plate and the like, and the laying thickness meets the structural requirement.

Specifically, the steel bar mesh enclosure 406 is composed of an L-shaped steel bar framework and a steel bar mesh, wherein a vertical section of the L-shaped steel bar framework is bound on the steel bar mesh, and a flat section is a free section; the height of the vertical section is consistent with the thickness of the gravel filter layer, the straight section meets the erection structure requirement, the L-shaped steel bar frameworks are uniformly arranged on the steel bar mesh sheet, the distance meets the erection requirement, the diameter of the L-shaped steel bar frameworks meets the erection requirement, the steel bar mesh can be cut automatically according to the requirement, and the construction requirement is met.

Specifically, the reinforcing bar sealing frame 405 is formed by welding 2 longitudinal and transverse reinforcing bars, the end portion of the reinforcing bar sealing frame is bent, and the bending distance can meet the structural requirement of buckling the perforated cement pipe.

Specifically, water collecting unit 5 includes collector pipe 501, pressure release box 502, water stop ring 503 and leading pipe 504, the collector pipe sets up the position placed in the middle in filter unit's foraminiferous cement pipe 408 to pass brick molding bed 7 and soleplate 1 and set up the pressure release box intercommunication in the sump pit, the pressure release box other end intercommunication leading pipe 504, still be equipped with the water stop ring on the collector pipe. In order to meet the requirements of replacement and cleaning of the water collecting pipe within the reasonable service life of the building, the distance between the water collecting pipe and the inner wall of the cement pipe with the hole is larger than 10 CM.

Specifically, the water collecting pipe 501 is made of steel pipes, the pipe diameter can be selected according to underground water and rainfall conditions of the place where the project is located, 10CM is generally selected, the water collecting pipe is provided with strip-shaped holes 5011 in the burying section, the hole width is preferably controlled to be more than 2CM, the holes are not too small, and blockage is prevented. The length and the structural style of the embedded section can be designed according to the water receiving quantity requirement and can be set into a T shape, an L shape, an I shape and the like. A water stop ring 503 is welded at the joint of the water collecting pipe and the foundation slab 1, the water stop ring can be round or rectangular, and the water stop ring can be cut on site as required; the pipe wall of the water collecting pipe embedding section is provided with a strip-shaped hole for expanding the water collecting efficiency; the end of the water collecting pipe is welded with a steel connecting disc, 6 bolt holes are uniformly formed in the connecting disc, and the hole diameter of each bolt is consistent with that of the steel connecting disc of the pressure relief box. The water conduit 504 is made of steel pipes with the same specification, and is generally processed into an L shape, the length of the vertical section is set according to the depth of the water collecting well, a steel connecting disc is welded at the end of the straight section, and the specification and the style of the steel connecting disc are consistent with those of the water collecting pipe and are connected with the vertical section through welding. And (4) coating an anticorrosive material after the pipe fitting is processed.

Specifically, the pressure release box includes box body 5021, spring 5022, rubber buffer 5023, spring connecting rod 5024, steel connecting plate 5025, steel connecting pipe 5029 and steel connection pad 5028, be equipped with four at least springs in the box body, the curb plate rigid coupling of spring connecting rod and bolt 5026 and box body is passed through to spring connecting rod one end, and it is fixed with the steel connecting plate that the other end passes through the spring connecting rod, the steel connecting plate opposite side is equipped with rubber buffer and valve port board 5027 and is fixed with the steel connecting plate through the bolt, it has the round hole to open at valve port board middle part, and the round hole system has the wedge incision, opens at the both sides board middle part of box body has the round hole concentric with the valve port board round hole, and the round hole of both sides board is used for connecting the steel connecting pipe, passes.

Specifically, pressure release box body panel select for use intensity grade be Q235 the steel sheet can, thickness is greater than 5 mm. And cutting and punching the batch of plates according to the design drawing and the size. The middle parts of the two side plates of the box body are provided with round holes with the diameter larger than 10CM, and the diameter can be properly adjusted according to the water flow. The rubber buffer can purchase the finished product or process by oneself, and the rubber buffer middle part punches, its aperture cooperation bolt model can, the tip makes the wedge. The round hole in the middle of the valve port plate 5027 is made into a wedge-shaped notch, the caliber of the notch is matched with the wedge shape at the end part of the rubber plug, and a certain margin is left. Bolt 5026 should add the packing ring when passing the steel connecting plate and being connected with the rubber buffer, screws up with two nuts at the bolt tip, prevents to become flexible after long-time the use and drops. The steel connecting plate 5025 is a circular plate, 4 spring connecting rods 5024 are uniformly welded on one side of the steel connecting plate 5025, and the diameter of the steel connecting plate is slightly smaller than the inner diameter of a spring, so that the spring is convenient to mount. A bolt for fixed spring connecting rod should adopt the high carbon steel material, and the nut welding is in the inboard of box body curb plate, and the bolt bar passes the bolt hole of this curb plate and twists the nut, tip spring welding connecting rod, spring connecting rod grafting spring. The length of the steel connecting pipe on the outer side of the side plate is larger than that of the bolt rod, so that the screwing operation space of the bolt rod is ensured. The steel connecting disc 5028 is circular, 6 bolt holes are uniformly formed in the steel connecting disc 5028, and the aperture is larger than the diameter of the bolt rod by 1-2 mm. And after the parts of the pressure relief box are processed, performing anticorrosive treatment and assembling, wherein other parts except for bolt connection adopt a welding mode.

Specifically, the drainage unit 6 comprises a water pump 601 and a drainage pipe 602, and the drainage pipe is connected with the underground space structure pipeline embedded part and is communicated with the municipal pipeline 8 outside the underground space structure pipeline embedded part.

A construction method of a water pressure control system of an underground space structure comprises the following steps:

and S1, processing the components of the on-site water pressure control system according to the specific structure of the water collecting well on the construction site, the design drawing and the size of the water collecting well, and processing the water collecting pipe, the water guiding pipe, the pressure relief box, the steel bar mesh enclosure and the steel bar sealing frame.

A. The water collecting pipe is made of a steel pipe, the pipe diameter can be selected according to underground water and rainfall conditions of the location of an engineering, 10CM is selected under general conditions, a strip-shaped hole is formed in the axial direction of the embedded section of the water collecting pipe, the width of the strip-shaped hole is larger than 2CM, the embedded section length and the structure style are designed according to the water collecting quantity requirement, a water stop ring is welded at the joint of the water collecting pipe and the wall of a water collecting pit, a steel connecting disc is welded at the end part of the water collecting pipe, and the water collecting pipe is coated with.

B. The water pipe is made of steel pipes, the whole shape of the water pipe is L-shaped, the length of a vertical section of the water pipe is set according to the depth of a water collecting well, a steel connecting disc is welded at the end part of a straight section of the water pipe and is connected with the vertical section in a welding mode, and the water pipe is coated with an anticorrosive material.

C. The pressure relief box body is made of a steel plate with the strength grade of Q235, the thickness of the steel plate is not smaller than 5mm, batch cutting and punching are performed on the steel plate according to a design drawing and the size, circular holes are formed in the middle of the two side plates, the diameter of each circular hole is not smaller than 10CM, one end of each rubber plug is made into a wedge shape, holes are formed in the middle of each rubber plug, the circular holes in the middle of the valve port plate are made into wedge-shaped notches, and the diameter of each notch is matched with the corresponding rubber plug and a certain margin is reserved; the valve port plate is fixedly connected with the rubber plug and the steel connecting plate through bolts, the steel connecting plate is a circular plate, 4 spring connecting rods are uniformly welded on one side of the steel connecting plate, the spring connecting rods are welded on the end part of the other side plate of the box body, the two ends of the spring are respectively connected with the spring connecting rods, the steel connecting pipes are fixedly connected on the outer sides of the two side plates of the box body, and the steel connecting pipes are fixedly connected with the steel connecting plates on the end parts of the.

D. The steel bar mesh enclosure is composed of an L-shaped steel bar framework and a steel bar mesh, wherein the vertical section of the L-shaped steel bar framework is bound on the steel bar mesh, and the flat section is a free section; the height of the vertical section is consistent with the thickness of the gravel filter layer, the straight section meets the erection structure requirement, the L-shaped steel bar frameworks are uniformly arranged on the steel bar mesh sheet, the distance meets the erection requirement, the diameter of the L-shaped steel bar frameworks meets the erection requirement, the steel bar mesh can be cut automatically according to the requirement, and the construction requirement is met.

E. The reinforcing steel bar sealing frame is formed by welding 2 longitudinal reinforcing steel bars and 2 transverse reinforcing steel bars, the end part of the reinforcing steel bar sealing frame is bent, and the bending interval of the reinforcing steel bar sealing frame can meet the structural requirement of buckling the reinforcing steel bar sealing frame on the cement pipe with the hole.

S2 excavation of foundation pit

And excavating the foundation pit according to the positioning line, and performing outward expansion and deepening treatment on the position of the water collecting well, wherein the outward expansion range is not less than the laying range of the filtering unit.

S3 mould for building bricks

The building process of the brick forming die is basically the same as that of the conventional method, the thickness of the forming die plate is larger than 380mm, building is suspended until the position of the cement pipe with holes is built, and building is continued until the position of the elevation is built after the cement pipe with holes and the water collecting pipe are installed.

S4 laying pebble filter layer

Selecting pebbles with the diameter larger than 10CM, starting to lay a pebble filter layer when the strength of brick moulding bed mortar in the pebble laying height range reaches 100%, stopping laying until the position of about 1/2 of the lower skin of the perforated cement pipe, continuing to lay the pebbles in layers after the reinforcing bar net enclosure is installed and gravels with a certain thickness are laid, wherein the laying thickness is determined according to the anti-lateral pressure of the reinforcing bar net enclosure until the position of 10CM of the lower skin of the foundation slab cushion, and installing the perforated cement pipe and the water collecting pipe.

S5, installing reinforcing mesh enclosure

The manufactured steel bar net enclosure baffle is erected along the boundary position of the pebble filter layer and the broken stone filter layer, the whole body is annular, the tail end of the steel bar net enclosure baffle is attached to and fixed with the brick moulding bed, the straight section of the L-shaped steel bar framework faces one side of the cement pipe with the holes and is firmly pressed by broken stones to prevent toppling, and the lower part of the other side of the steel bar net enclosure baffle is firmly pressed by pebbles.

S6 laying gravel filter layer

Selecting gravels with the diameter larger than 3CM, starting to lay the gravels in layers after the steel bar net enclosure is installed in place, wherein the laying thickness is determined according to the lateral pressure resistance of the steel bar net enclosure, pausing when the cement pipe with holes is laid to the installation position of the cement pipe with holes, continuing to lay the cement pipe with holes and the water collecting pipe after the cement pipe with holes and the water collecting pipe are installed and the rest brick moulding beds are laid to reach the construction strength until the lower skin of the cushion layer of the foundation bottom plate is within 10 CM.

S7, mounting the cement pipe with the hole and the water collecting pipe

At least wrapping 3 layers of perforated cement pipes by using a steel bar net piece, installing one end of each perforated cement pipe perpendicular to the side surface of a brick moulding bed and ensuring that the end part of each perforated cement pipe is attached to the brick moulding bed, tightly fastening the other end of each perforated cement pipe by using a steel bar sealing frame and wrapping the other end of each perforated cement pipe by using at least 3 layers of steel wire net pieces, pressing and positioning by using a small amount of gravel, then starting to install a water collecting pipe, arranging one section of a water filtering hole of the water collecting pipe at the central position in the perforated cement pipe, installing a water stopping ring on the other section of the water collecting pipe, enabling the water stopping ring to be positioned at the central line position of the side wall of a water collecting well, enabling the water collecting pipe to penetrate through the brick moulding bed and be connected with a pressure relief box, positioning and reinforcing, and then finishing building the rest brick moulding beds.

S8 laying dense mesh net

The dense mesh net covers the upper parts of the pebble filter layer and the gravel filter layer, the coverage range is larger than 40CM of the outer boundary of the pebble filter layer, the downward burial depth close to one side of the brick molding bed along the outer side wall of the brick molding bed is not less than 20CM, the thickness is 10CM +/-the technical data can be selected according to the actual condition of the building, and the effect of the method is to prevent the filter unit from being blocked by concrete when the concrete is poured. The dense mesh net can be replaced by a water filtering plate, a heat insulation plate and the like, and the laying thickness of the dense mesh net can meet the structural requirement.

S9, erecting a formwork and pouring concrete

Reserving holes in the template in advance, tightly plugging after the holes penetrate through the water collecting pipes, pouring concrete according to design requirements, controlling the concrete slump during pouring, and timely maintaining after pouring is finished.

S10, mounting pressure relief box and water conduit

The processed and manufactured pressure relief box is connected to a steel connecting disc at the end part of the water collecting pipe through a bolt, a rubber ring is placed between the steel connecting discs for sealing, and the other end of the pressure relief box is connected with a water diversion pipe through the steel connecting disc.

S11, mounting water pump and drain pipe

And selecting a water pump with proper power, a float switch and a drain pipe, connecting the drain pipe with an underground space structure pipeline embedded part, and communicating with an external municipal pipeline.

This underground space structure water pressure control system can respond to water pressure in real time through the unit that catchments, and spring compression piston opens after water pressure reaches the setting value, and in passing through the leading water pipe drainage well with groundwater, the water pump float switch closure of drainage unit behind the liquid level reached a locating position through simple sediment, drains into municipal rainwater pipeline with water through the drain pipe.

The embodiments of the invention that are illustrated in the drawings are exemplary only and should not be taken as limiting the invention.

Claims (6)

1. The utility model provides an underground space structure water pressure control system, includes sump pit, sedimentation tank and covers at sump pit well head foundation plate all around, its characterized in that: one side in the sump pit is equipped with a plurality of water pressure control system, water pressure control system includes filter unit, water collection unit and drainage unit, is equipped with filter unit in water collection unit's collector pipe outside, water collection unit's collector pipe one end intercommunication drainage unit.

2. The underground space structure water pressure control system of claim 1, wherein: the filtering unit comprises a dense mesh net, a pebble filtering layer and a gravel filtering layer which are arranged below the foundation bottom plate, a reinforcing steel bar net enclosure is arranged between the pebble filtering layer and the gravel filtering layer, a perforated cement pipe fixedly connected with the brick moulding bed is arranged in the gravel filtering layer positioned on the inner side of the reinforcing steel bar net enclosure, a reinforcing steel bar net piece is arranged on the outer wall of the perforated cement pipe, the reinforcing steel bar net piece is fixed through a reinforcing steel bar sealing frame, and a plurality of water holes are formed in the pipe wall of the perforated cement pipe.

3. The underground space structure water pressure control system of claim 1, wherein: the water collecting unit comprises a water collecting pipe, a pressure relief box, a water stopping ring and a water diversion pipe, wherein the water collecting pipe is arranged at the middle position in a porous cement pipe of the filtering unit and penetrates through a brick mould and a water collecting well side wall to be communicated with the pressure relief box arranged in the water collecting well, the other end of the pressure relief box is communicated with the water diversion pipe, and the water stopping ring is further arranged on the water collecting pipe.

4. The underground space structure water pressure control system of claim 3, wherein: pressure release box includes box body, spring, rubber buffer, spring coupling pole, steel connecting plate, steel connecting pipe and steel connection pad, be equipped with four at least springs in the box body, the curb plate rigid coupling of spring coupling pole and bolt and box body is passed through to spring coupling pole one end, and it is fixed with the steel connecting plate that the other end passes through the spring coupling pole, steel connecting plate opposite side is equipped with rubber buffer and valve port board and is fixed with the steel connecting plate through the bolt, open at valve port board middle part has the round hole, the round hole system has the wedge incision, open at the both sides board middle part of box body have with the endocentric round hole of valve port board round hole, steel connecting pipe and steel connection pad rigid coupling.

5. The underground space structure water pressure control system of claim 1, wherein: the drainage unit comprises a water pump and a drainage pipe, and the drainage pipe is connected with the underground space structure pipeline embedded part and is communicated with a municipal pipeline outside the underground space structure pipeline embedded part.

6. A construction method of a water pressure control system of an underground space structure is characterized in that: the method comprises the following steps:

s1, processing components of the on-site water pressure control system according to a design drawing and the size of a water collecting well according to the specific structure of the water collecting well on the construction site, and processing a water collecting pipe, a water guiding pipe, a pressure relief box, a steel bar mesh enclosure and a steel bar sealing frame;

A. the water collecting pipe is made of a steel pipe, the pipe diameter can be selected according to underground water and rainfall conditions of the site of the project, generally 10CM is selected, a strip-shaped hole is formed in the axial direction of the embedding section of the water collecting pipe, the width of the strip-shaped hole is larger than 2CM, the length and the structural style of the embedding section are designed according to the water collecting quantity requirement, a water stop ring is welded at the joint of the water collecting pipe and the wall of the water collecting pit, a steel connecting disc is welded at the end part of the water collecting pipe, and the water collecting pipe is coated with;

B. the water pipe is made of steel pipes, the whole shape of the water pipe is L-shaped, the length of a vertical section of the water pipe is set according to the depth of a water collecting well, a steel connecting disc is welded at the end part of a straight section of the water pipe and is connected with the vertical section in a welding way, and the water pipe is coated with an anticorrosive material;

C. the pressure relief box body is made of a steel plate with the strength grade of Q235, the thickness of the steel plate is not smaller than 5mm, batch cutting and punching are performed on the steel plate according to a design drawing and the size, circular holes are formed in the middle of the two side plates, the diameter of each circular hole is not smaller than 10CM, one end of each rubber plug is made into a wedge shape, holes are formed in the middle of each rubber plug, the circular holes in the middle of the valve port plate are made into wedge-shaped notches, and the diameter of each notch is matched with the corresponding rubber plug and a certain margin is reserved; the valve port plate is fixedly connected with the rubber plug and a steel connecting plate through bolts, the steel connecting plate is a circular plate, 4 spring connecting rods are uniformly welded on one side of the steel connecting plate, the spring connecting rods are welded at the end part of the other side plate of the box body, two ends of a spring are respectively connected with the spring connecting rods, steel connecting pipes are fixedly connected on the outer sides of two side plates of the box body respectively, a steel connecting plate is fixedly connected at the end part of the steel connecting pipe, and finally, an;

D. the steel bar mesh enclosure is composed of an L-shaped steel bar framework and a steel bar mesh, wherein the vertical section of the L-shaped steel bar framework is bound on the steel bar mesh, and the flat section is a free section; the height of the vertical section is consistent with the thickness of the gravel filter layer, the straight section meets the erection structural requirement, the L-shaped steel bar frameworks are uniformly arranged on the steel bar mesh sheet, the spacing meets the erection requirement, the diameter of the L-shaped steel bar frameworks meets the erection requirement, and the steel bar mesh can be cut automatically according to the requirement to meet the structural requirement;

E. the reinforcing steel bar sealing frame is formed by welding 2 longitudinal reinforcing steel bars and 2 transverse reinforcing steel bars respectively, and the end part of the reinforcing steel bar sealing frame is bent, wherein the bending interval of the reinforcing steel bar sealing frame meets the structural requirement of buckling the reinforcing steel bar sealing frame on the cement pipe with holes;

s2 excavation of foundation pit

Excavating a foundation pit according to the positioning line, and performing outward expansion and deepening treatment on the position of the water collecting well, wherein the outward expansion range is not smaller than the laying range of the filtering unit;

s3 mould for building bricks

The building process of the brick forming die is basically the same as that of the conventional method, the thickness of the forming die plate is more than 380mm, the building is suspended until the position of the cement pipe with holes is built, and the building is continued to the elevation position after the cement pipe with holes and the water collecting pipe are installed;

s4 laying pebble filter layer

Selecting pebbles with the diameter larger than 10CM, starting to lay a pebble filter layer when the strength of brick moulding bed mortar in the pebble laying height range reaches 100%, stopping laying until the position of about 1/2 of the lower skin of the perforated cement pipe, continuing to lay the pebbles layer by layer after the reinforcing bar net enclosure is installed and gravels with a certain thickness are laid, wherein the laying thickness is determined according to the anti-lateral pressure of the reinforcing bar net enclosure until the position of 10CM of the lower skin of the base bottom plate cushion layer, and installing the perforated cement pipe and the water collecting pipe;

s5, installing reinforcing mesh enclosure

Erecting the manufactured steel bar mesh enclosure along the boundary position of the pebble filter layer and the broken stone filter layer, wherein the whole steel bar mesh enclosure is annular, the tail end of the steel bar mesh enclosure is attached to and fixed with a brick moulding bed, the straight section of the L-shaped steel bar framework faces one side of the cement pipe with holes and is firmly pressed by broken stones to prevent toppling, and the lower part of the other side of the steel bar mesh enclosure is firmly pressed by pebbles;

s6 laying gravel filter layer

Selecting gravels with the diameter larger than 3CM, starting to lay the gravels in layers after the steel bar net enclosure is installed in place, wherein the laying thickness is determined according to the lateral pressure resistance of the steel bar net enclosure, pausing when the cement pipe with holes is laid to the installation position of the cement pipe with holes, continuing to lay the cement pipe with holes and the water collecting pipe after the cement pipe with holes and the water collecting pipe are installed and the rest brick moulding beds are built to reach the construction strength until the bottom plate cushion layer is within 10 CM;

s7, mounting the cement pipe with the hole and the water collecting pipe

At least wrapping 3 layers of perforated cement pipes by using a steel bar net piece, then installing one end of each perforated cement pipe perpendicular to the side surface of a brick moulding bed and ensuring that the end part of each perforated cement pipe is attached to the brick moulding bed, tightly fastening the other end of each perforated cement pipe by using a steel bar sealing frame and wrapping the other end of each perforated cement pipe by using at least 3 layers of steel wire meshes, covering and positioning by using a small amount of gravel, then starting to install a water collecting pipe, arranging one section of a water filtering hole of the water collecting pipe at the central position in the perforated cement pipe, installing a water stopping ring on the other section of the water collecting pipe, enabling the water stopping ring to be positioned at the central line position of the side wall of a water collecting well, enabling the water collecting pipe to penetrate through the brick moulding bed and be connected with a pressure relief;

s8 laying dense mesh net

Covering the dense mesh net on the upper parts of the pebble filtering layer and the gravel filtering layer, wherein the covering range is more than 20CM for filtering the pebbles, and the thickness is 10CM +/-; the outer boundary of the layer is 40CM, and the downward burial depth of one side close to the brick molding bed along the outer side wall of the brick molding bed is not less than the thickness of 10CM +/-s;

s9, erecting a formwork and pouring concrete

Reserving holes in the template in advance, tightly plugging after penetrating through the water collecting pipe, and pouring concrete according to design requirements;

s10, mounting pressure relief box and water conduit

Connecting the processed pressure relief box to a steel connecting disc at the end part of a water collecting pipe through a bolt, placing a rubber ring between the steel connecting discs for sealing, and connecting the other end of the pressure relief box to a water diversion pipe through the steel connecting disc;

s11, mounting water pump and drain pipe

And selecting a water pump, a float switch and a drain pipe which are matched in power, connecting the drain pipe with an underground space structure pipeline embedded part, and communicating the drain pipe with an external municipal pipeline.

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