CN110468862B - Plugging structure for precipitation wellhead of subway station - Google Patents
Plugging structure for precipitation wellhead of subway station Download PDFInfo
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- CN110468862B CN110468862B CN201910843731.5A CN201910843731A CN110468862B CN 110468862 B CN110468862 B CN 110468862B CN 201910843731 A CN201910843731 A CN 201910843731A CN 110468862 B CN110468862 B CN 110468862B
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- 238000001556 precipitation Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 273
- 239000010959 steel Substances 0.000 claims abstract description 273
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 5
- 239000004567 concrete Substances 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 8
- 230000002265 prevention Effects 0.000 abstract description 2
- 239000011083 cement mortar Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000353135 Psenopsis anomala Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2450/00—Gaskets
- E02D2450/10—Membranes
- E02D2450/105—Membranes impermeable
- E02D2450/106—Membranes impermeable for liquids
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention provides a plugging structure for a precipitation wellhead of a subway station, which comprises a bottom plate positioned above a precipitation well, and further comprises steel pipes, reinforcing steel bars, steel plates, steel ring pieces and axillary angles; the steel pipe extends out of the dewatering well and enters the bottom plate; the steel bars comprise an upper layer of steel bars and a lower layer of steel bars which are respectively arranged in the bottom plate; the steel plate is covered on the upper part of the steel pipe and is positioned on the upper part of the upper layer of steel bars, and the steel plate is fixedly connected with the upper layer of steel bars; the steel ring piece is sleeved on the steel pipe and is sealed with the steel pipe; the armpit angle surrounds and clings to the steel pipe and is arranged below the bottom plate; the plugging structure also comprises a waterproof layer, and the plugging parts can be prefabricated, produced and assembled on site, so that the plugging structure is convenient to stack, improves the construction conditions and saves the construction period; the structural rigidity is high, and the bearing capacity and the seepage prevention capacity of the structure after the precipitation wellhead of the subway station is plugged are improved.
Description
Technical Field
The invention belongs to the technical field of precipitation wells, and particularly relates to a plugging structure for a precipitation well head of a subway station.
Background
Along with the large development of the underground space in China, a certain number of dry dredging wells and relief wells are generally arranged in the pit in advance before the foundation pit of the building engineering is excavated, so that the underground water level and the bearing water head at the bottom of the pit are reduced, the sudden surge at the bottom of the foundation pit is prevented, and the stability of the bottom of the pit during the excavation construction is ensured. In the subway station construction process, plugging of a subway station dewatering wellhead is generally carried out after a bottom plate is poured, and the bottom plate can be poured in a later period after leaving holes with diameters of about 600 mm.
At present, plugging of dewatering wells is mostly carried out by a plugging method of firstly filling melon seed slices in a well pipe and then grouting and then pouring concrete. On one hand, the bottom plate has larger thickness and is directly contacted with water, the bearing water pressure is large, the mouth part of the dewatering well of the subway station is not provided with stressed reinforcing steel bars, the joint surface of new and old concrete is weaker, and the integrity is poor; on the other hand, the bottom plate is immersed for a long time, and cracks are easy to generate due to stress concentration, so that the waterproof effect is poor, and the water leakage phenomenon is easy to occur. Therefore, a simple and reliable structure is necessary to be invented to reduce the harm caused by poor plugging quality of the precipitation wellhead of the subway station, improve the stress and waterproof performance of the structure and ensure the normal use of the building.
Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a plugging structure for a subway station precipitation wellhead, which is used for effectively plugging the subway station precipitation wellhead left by a subway station and a basement bottom plate.
In order to achieve the above object, the present invention provides the following technical solutions:
The plugging structure comprises a bottom plate positioned above a precipitation well, and further comprises a steel pipe, a steel bar, a steel plate, a steel ring piece and an axillary angle;
the steel pipes are vertically arranged in the dewatering well, extend out of the dewatering well and enter the bottom plate;
the steel bars comprise upper layer steel bars arranged on the upper layer inside the bottom plate and lower layer steel bars arranged on the lower layer inside the bottom plate, and the upper layer steel bars and the lower layer steel bars are arranged on the outer sides of the steel pipes;
The steel plate is covered at the upper end of the steel pipe and is positioned at the upper part of the upper layer of steel bars, and the steel plate is fixedly connected with the upper layer of steel bars;
The steel ring piece is sleeved on the steel pipe and sealed with the steel pipe, and the steel ring piece is arranged in the bottom plate;
the armpit angle surrounds and clings to the steel pipe and is arranged below the bottom plate;
And concrete is poured into the bottom plate, the steel pipes and the axillary corners.
In the plugging structure for a precipitation wellhead of a subway station, preferably, the number of the steel ring pieces is multiple, and the multiple steel ring pieces are uniformly distributed on the steel pipe up and down;
Preferably, the lowest layer of the steel ring piece is closely attached to the lower surface of the lower layer of the steel bar;
still preferably, the interval between any two steel ring pieces is 0.5m.
In the plugging structure for a precipitation wellhead of a subway station as described above, preferably, the plugging structure further includes a waterproof layer, the waterproof layer includes a horizontal waterproof layer and a vertical waterproof layer, the horizontal waterproof layer is laid in a horizontal direction between the lowermost layer of the steel ring sheet and the axillary angle, the vertical waterproof layer is laid in a vertical direction between the steel pipe and the axillary angle, and the horizontal waterproof layer is sealed with the vertical waterproof layer.
In the plugging structure for a precipitation wellhead of a subway station as described above, preferably, the horizontal waterproof layer comprises a waterproof coiled material and a water stopping flange, and the waterproof coiled material is tightly attached between the water stopping flange and the axillary angle; the length of the horizontal waterproof layer exceeds the outer edge of the steel ring piece, and the length of the vertical waterproof layer is the same as the lower edge of the armpit angle.
In the plugging structure for a precipitation wellhead of a subway station, preferably, the steel ring piece is provided with a plurality of through holes;
Preferably, the surface of the steel ring sheet is provided with a first rib, and the first rib protrudes out of the surface of the steel ring sheet.
In the plugging structure for a precipitation wellhead of a subway station as described above, preferably, the surface of the steel plate is provided with a second rib, and the second rib protrudes from the surface of the steel plate;
Preferably, the second rib protrudes 5mm from the surface of the steel plate.
In the plugging structure for the precipitation wellhead of the subway station, preferably, the axillary angle is in an inverted truncated cone shape.
In the plugging structure for the precipitation wellhead of the subway station, preferably, a rubber sealing gasket is arranged at the joint of the steel pipe and the steel ring piece;
preferably, the steel pipe and/or the steel ring piece and/or the steel plate are/is made of Q235-B steel;
still preferably, the length of the steel pipe below the bottom of the bottom plate is twice the diameter of the steel pipe.
In the plugging structure for the precipitation wellhead of the subway station, preferably, the upper layer of steel bars and the lower layer of steel bars comprise a plurality of steel bars, the steel bars are distributed in a crisscross mode to form a crossing area, and the area of the crossing area is not smaller than that of the steel plate.
In the plugging structure for a precipitation wellhead of a subway station as described above, preferably, the strength of concrete inside the axillary angle is higher than the strength of concrete inside the bottom plate;
Preferably, the concrete inside the axillary angle is micro-expansive concrete.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
According to the invention, crisscrossed steel bars are arranged on the upper layer and the lower layer of the bottom plate to improve the bearing capacity of the bottom plate, then a steel plate is arranged at the steel bar on the upper layer of the bottom plate, a plurality of layers of steel ring sheets are arranged below the steel plate, and axillary angles are arranged at the contact positions of the steel pipes and the bottom plate, so that the stability and bearing capacity of the structure are enhanced, and meanwhile, the waterproof layer and sealing gasket design improves the seepage-proofing capacity of the plugging structure.
The plugging structure for the precipitation wellhead of the subway station has the advantages that the plugging part can be prefabricated, produced and assembled on site, the transportation and stacking are convenient, the construction condition is improved, and the construction period is saved; and the structural rigidity is high, the overall performance is good, the bearing capacity and the seepage-proofing capacity of the structure after the precipitation wellhead of the subway station is plugged are improved, and the crack development and the damage of new and old bonding surfaces are reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. Wherein:
FIG. 1 is a cross-sectional view of a plugging structure of the present invention;
FIG. 2 is a schematic plan view of a plugging structure according to the present invention;
FIG. 3 is a schematic view of the steel ring of FIG. 1;
Fig. 4 is a partial enlarged view of fig. 1 at a.
In the figure: 1. a bottom plate; 2. an upper layer of reinforcing steel bars; 3. lower layer steel bars; 4. a steel plate; 5. a rubber gasket; 6. steel ring piece; 7. a waterproof layer; 71. a horizontal waterproof layer; 72. a vertical waterproof layer; 8. axillary angle; 9. a steel pipe; 10. concrete filled steel tube; 11. dewatering well; 12. and a water stopping flange.
Detailed Description
The invention will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. The terms "coupled" and "connected" as used herein are to be construed broadly and may be, for example, fixedly coupled or detachably coupled; either directly or indirectly through intermediate components, the specific meaning of the terms being understood by those of ordinary skill in the art as the case may be.
As shown in fig. 1 to 4, according to an embodiment of the present invention, there is provided a plugging structure for a precipitation wellhead of a subway station, which can effectively plug the precipitation wellhead of the subway station left over from a subway station and a basement floor.
The plugging structure comprises a bottom plate 1 positioned above a dewatering well 11, wherein the height of the bottom plate 1 can be 600-1000mm, a concrete cushion layer is arranged below the bottom plate 1, preferably, the concrete cushion layer can be C20 concrete with the thickness of 200mm, and the plugging structure further comprises a steel pipe 9, a steel bar, a steel plate 4, a steel ring piece 6 and an axillary angle 8.
The steel pipe 9 is vertically arranged in the dewatering well 11, the diameter of the steel pipe 9 is smaller than that of the dewatering well 11, the steel pipe 9 extends out of the dewatering well 11 and enters the bottom plate 1, namely the lower end of the steel pipe 9 is positioned in the dewatering well 11, and the upper end of the steel pipe is positioned in the bottom plate 1 above the dewatering well 11; in the specific embodiment of the invention, the steel pipe 9 is made of Q235-B steel, the outer diameter of the steel pipe 9 is 300mm smaller than the diameter of the water lowering well 11, the wall thickness of the steel pipe is 8mm, and the length dimension of the steel pipe 9 below the bottom of the bottom plate 1 is 2 times of the diameter of the steel pipe.
The reinforcing bar is including locating the upper reinforcing bar 2 of the inside upper strata of bottom plate 1 to locate the lower floor reinforcing bar 3 of the inside lower floor of bottom plate 1, upper reinforcing bar 2 and lower floor reinforcing bar 3 are the atress reinforcing bar of bottom plate 1 structure to form reinforced concrete structure after bottom plate 1 pours concrete, improve the bearing capacity of bottom plate 1. The upper layer steel bars 2 and the lower layer steel bars 3 are all a plurality of steel bars, the upper layer steel bars 2 and the lower layer steel bars 3 are all arranged in a crisscross manner, and are cut off at the positions of the steel pipes 9, namely, the steel bars are arranged in a crossed manner along the periphery of the steel pipes 9. The upper layer steel bars 2 and the next steel bars are arranged in a crisscross manner to form a crossing area, and the area of the crossing area is not smaller than that of the steel plate 4.
The steel plate 4 is covered and connected with the upper end of the steel pipe 9, namely, the steel plate covers the pipe orifice of the steel pipe 9 and is connected with the steel pipe 9, and the steel plate 4 is also covered and arranged at the center of the upper part of the upper layer steel bar 2 and fixedly connected with the upper layer steel bar 2; in the specific embodiment of the invention, the steel plate 4 is arranged closely above the upper layer steel bar 2 and the steel pipe 9, and the steel plate 4 is fully welded with the upper layer steel bar 2. The upper ends of the steel plate 4 and the steel pipe 9 are fixedly connected in a welt full-welding mode, and the distance between the uppermost end of the steel plate 4 and the top of the bottom plate 1 is 50mm.
In the specific embodiment of the invention, the steel plate 4 is Q235-B steel, the steel plate 4 is round, the diameter of the steel plate 4 is 3 times that of the dewatering well 11, the thickness of the steel plate 4 is 20mm, the surface of the steel plate 4 is provided with a second rib, and the second rib protrudes out of the surface of the steel plate 4; preferably, the second ribs protrude from the surface of the steel plate 4 by 5mm, and the steel plate 4 is provided with the second ribs to facilitate better combination with the concrete in the bottom plate 1 and enhance the curing effect.
The steel ring piece 6 is sleeved on the steel pipe 9 and is in sealing connection with the steel pipe 9, the steel ring piece 6 and the steel pipe 9 are welded in full, and the steel ring piece 6 is arranged in the bottom plate 1; in the specific embodiment of the invention, the steel ring piece 6 is made of Q235-B steel, the steel ring piece 6 is in a circular ring shape, the inner diameter of the steel ring piece 6 is the same as the outer diameter of the steel pipe 9, and the outer diameter of the steel ring piece 6 is equal to the diameter of the steel plate 4; the thickness of the steel ring pieces 6 is 10mm, a plurality of steel ring pieces 6 are arranged, the plurality of steel ring pieces 6 are uniformly distributed on the steel pipe 9 (not all shown in the figure) up and down along the height direction of the steel pipe 9, and the interval between any two steel ring pieces 6 is 0.5m; preferably, the lowest layer steel ring piece 6 is closely attached to the lower surface of the lower layer steel bar 3, and the overlapping section of the lowest layer steel ring piece 6 and the bottom layer steel bar is fixedly connected by full welding.
In the specific embodiment of the invention, the steel ring sheet 6 is provided with a plurality of through holes which are uniformly distributed along the circumferential direction, and the through holes have the functions of facilitating the concrete pouring compaction in the bottom plate 1 positioned below the steel plate 4, preventing the occurrence of bubbles and improving the bearing capacity of the bottom plate 1; 4 through holes are formed in each steel ring piece 6 at an annular interval of 90 degrees, and the aperture is 100mm. The surface of the steel ring piece 6 is provided with a first rib which protrudes out of the surface of the steel ring piece 6; preferably, the first ribs protrude out of the surface of the steel ring piece 6 by 3mm, and the first ribs arranged on the steel ring piece 6 have the same action as the second ribs arranged on the steel plate 4, so as to better combine with the concrete in the bottom plate 1 and enhance the curing effect. The arrangement of the steel ring pieces 6 effectively disperses the load applied to the dewatering well 11 from the steel plate 4, and the load is dispersed to the bottom plate 1 and the axillary angle 8 through the multi-layer steel ring pieces 6, so that the stress is effectively dispersed, and the stability of the structure is ensured; in addition, the rubber sealing gasket 5 is arranged between the steel ring piece 6 and the steel pipe 9, so that the sealing performance of the plugging structure is enhanced, and water seepage is prevented.
The armpit corners 8 are arranged below the bottom plate 1 in a surrounding and clinging manner to the steel pipes 9; the armpit angle 8 is in an inverted truncated cone shape, the bevel edge clamping angle between the upper bottom surface and the lower bottom surface edge of the armpit angle 8 is 45 degrees (namely, the oblique line inclination angle of the longitudinal section of the armpit angle 8 is 45 degrees), the lower bottom surface of the armpit angle 8 is abutted to the wellhead of the dewatering well 11, and the thickness of the armpit angle 8 is larger than that of the concrete cushion layer. The diameter of the upper bottom surface of the armpit angle 8 is 3 times that of the steel pipe 9, and the diameter of the lower bottom surface is the same as that of the steel pipe 9. The inside concreting of armpit angle 8, namely armpit angle 8 is the concrete structure, and concrete intensity is C35 grade, and waterproof grade is P10, and the concrete is little expansion concrete to further form sealedly to steel pipe 9 and bottom plate 1, prevent infiltration, the setting of armpit angle 8 has strengthened the shearing and the anti-cutting ability of structure.
The plugging structure of the plugging structure further comprises a waterproof layer 7, wherein the waterproof layer 7 comprises a horizontal waterproof layer 71 and a vertical waterproof layer 72, the horizontal waterproof layer 71 is horizontally paved between the lowest layer steel ring sheet 6 and the axillary angle 8, the vertical waterproof layer 72 is vertically paved between the steel pipe 9 and the axillary angle 8 and is closely attached to the steel pipe 9, and the joint between the horizontal waterproof layer 7 and the vertical waterproof layer 7 is sealed. The horizontal length of the waterproof layer 7 exceeds the outer edge of the steel ring sheet 6 by 0.5m, and the vertical length is the same as the lower edge of the armpit angle 8. The axillary angle 8 is arranged below the waterproof layer 7. The horizontal waterproof layer 71 comprises a waterproof coiled material and a water stopping flange 12, wherein the waterproof coiled material is tightly arranged between the water stopping flange and an axillary angle, and the water stopping flange 12 is tightly arranged below the lowest layer steel ring sheet 6; the vertical waterproof layer 72 is a waterproof coiled material, and forms a seal with the steel pipe 9 and the axillary angle 8 to prevent water seepage.
In the specific embodiment of the invention, the rubber sealing gasket 5 is arranged below the joint of the steel pipe 9 and the steel ring piece 6, and the water seepage prevention effect of the plugging structure is further improved by the arrangement of the rubber sealing gasket 5.
In the specific embodiment of the invention, concrete is poured into the bottom plate 1, the steel pipe 9 and the axillary angle 8; the strength of the concrete poured in the axillary angle 8 is one level higher than that of the concrete poured in the bottom plate 1, the concrete strength of the axillary angle 8 is C40-grade micro-expansion concrete, the concrete of the bottom plate 1 and the concrete-filled steel tube 10 are common concrete, the strength of the concrete-filled steel tube 10 is C30-grade, and the strength of the concrete poured in the bottom plate 1 is C35-grade. Compared with the bottom plate 1, the axillary angle 8 is mainly formed by adopting concrete with high primary strength, namely the axillary angle 8 is used as a main stress member, the concrete strength needs to be improved by one stage in consideration of stress concentration, the bottom plate 1 further comprises a cement mortar layer positioned above the upper layer steel bar 2 for improving the flatness of the plugging structure, the thickness of the cement mortar layer is 50mm, namely, the distance from the uppermost end of the steel plate 4 to the top of the bottom plate 1 (namely, the top of the cement mortar layer) is 50mm, namely, after the concrete is poured, cement mortar is smeared on the top of the bottom plate to form the cement mortar layer.
The part of the steel pipe 9 positioned in the dewatering well 11 is uniformly provided with penetrating holes on the pipe wall, when the steel pipe concrete 10 is poured in the steel pipe 9, the steel pipe concrete 10 overflows through the penetrating holes, the steel pipe 9 and the wellhead of the dewatering well 11 are poured and solidified, and the area of the lower part of the steel pipe 9 positioned in the dewatering well 11 is filled with clay balls.
The installation steps of the plugging structure for the 11 mouths of the dewatering wells of the subway station are as follows:
Firstly, prefabricating a plugging structure according to the diameter of a dewatering well 11, wherein the outer diameter of a steel pipe 9 is 30cm smaller than the diameter of the dewatering well 11, the wall thickness is 8mm, and the length of the steel pipe 9 is 2 times the diameter of the steel pipe 9 from an upper layer of reinforcing steel bar 2 to a position exceeding the bottom 2 times of the bottom of a bottom plate 1. The steel ring sheet 6 is fully welded after being aligned with the center of the steel pipe 9, and a ring is arranged every 0.5m until one steel ring sheet 6 is arranged under the lower layer steel bar 3. The manufactured structure is placed in a dewatering well 11, and the center of a steel pipe 9 is aligned with the center of the dewatering well 11 and is sunk to the designed depth.
Then the waterproof layer 7 is horizontally paved between the bottommost steel ring piece 6 and the armpit angle 8; the vertical direction is paved between the steel pipe 9 and the axillary angle 8, and the joint between the horizontal direction and the vertical direction is sealed. And then, pouring the concrete at the axillary angle 8, carrying out formwork supporting on the bottom plate 1 after the strength of the concrete at the axillary angle 8 meets the design requirement, placing the lower layer steel bars 3 in the bottom plate 1, fully welding the overlapped sections of the bottommost layer steel ring piece 6 and the lower layer steel bars 3, and arranging a rubber sealing gasket 5 at the joint of the steel pipe 9 and the steel ring piece 6.
After the pouring of concrete to the bottom plate 1 to the port position on the upper part of the steel pipe 9 is completed, the underground structure meets the anti-floating requirement, the opening of the dewatering well 11 of the subway station of the bottom plate 1 is plugged after the experience is collected, and the pouring of concrete to the bottom layer height of the steel pipe 9 is performed in the dewatering well 11. Then, an upper layer of steel bars 2 are paved outside the upper end of the steel pipe 9, and then the steel plate 4 is placed above the upper layer of steel bars 2 and the steel pipe 9, and the steel plate 4 is fully welded with the upper layer of steel bars 2 and the steel pipe 9 respectively. And finally, finishing the sealing process of the bottom plate 1 at the positions of the upper layer steel bars 2 and the steel plates 4, trowelling the sealing positions by using cement mortar, and finishing the well sealing work.
The plugging structure for the precipitation wellhead of the subway station has the advantages that the plugging structure is strong in structural integrity with a bottom plate, obviously enhanced in rigidity and improved in integral bending resistance through welding the steel plates, the steel ring sheets and the upper and lower layer steel bars; axillary angles are arranged at the lower parts of two sides between the bottom plate and the steel pipe, so that the shearing resistance and the anti-shearing resistance of the structure are enhanced. After the dewatering well is plugged, the load is transferred to the middle and lower steel ring pieces by the upper steel plate and then is diffused to the bottom plate and the axillary angle, so that the stress is effectively diffused, and the stability of the structure is ensured. The whole structure is provided with a plurality of waterproof structures from bottom to top, wherein the waterproof capability of the first waterproof structure, namely a waterproof layer, is strongest, and the impervious capability of the hole plugging is effectively improved.
In summary, the plugging structure for the precipitation wellhead of the subway station has the advantages that the plugging parts can be prefabricated, produced and assembled on site, the transportation and stacking are convenient, the construction conditions are improved, and the construction period is saved; and the structural rigidity is high, the overall performance is good, the bearing capacity and the seepage-proofing capacity of the structure after the precipitation wellhead of the subway station is plugged are improved, and the crack development and the damage of the new and old bonding surfaces are reduced.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. The plugging structure comprises a bottom plate positioned above a precipitation well, and is characterized by further comprising steel pipes, reinforcing steel bars, steel plates, steel ring pieces and axillary angles;
the steel pipes are vertically arranged in the dewatering well, extend out of the dewatering well and enter the bottom plate;
the steel bars comprise upper layer steel bars arranged on the upper layer inside the bottom plate and lower layer steel bars arranged on the lower layer inside the bottom plate, and the upper layer steel bars and the lower layer steel bars are arranged on the outer sides of the steel pipes;
The steel plate is covered at the upper end of the steel pipe and is positioned at the upper part of the upper layer of steel bars, and the steel plate is fixedly connected with the upper layer of steel bars;
The steel ring piece is sleeved on the steel pipe and sealed with the steel pipe, and the steel ring piece is arranged in the bottom plate;
the armpit angle surrounds and clings to the steel pipe and is arranged below the bottom plate;
concrete is poured into the bottom plate, the steel pipes and the axillary angles;
a rubber sealing gasket is arranged at the joint of the steel pipe and the steel ring piece;
the steel ring pieces are uniformly distributed on the steel pipe from top to bottom, the lowest layer of steel ring pieces cling to the lower surface of the lower layer of steel bars, and overlapping sections of the lowest layer of steel ring pieces and the lower layer of steel bars are fixedly connected by full welding;
The plugging structure further comprises a waterproof layer, wherein the waterproof layer comprises a horizontal waterproof layer and a vertical waterproof layer, the horizontal waterproof layer is paved between the lowest layer of the steel ring sheet and the axillary angle along the horizontal direction, the vertical waterproof layer is paved between the steel pipe and the axillary angle along the vertical direction, and the horizontal waterproof layer and the vertical waterproof layer are sealed;
the horizontal waterproof layer comprises a waterproof coiled material and a water stopping flange, and the waterproof coiled material is tightly arranged between the water stopping flange and the axillary angle; the length of the horizontal waterproof layer exceeds the outer edge of the steel ring piece, and the length of the vertical waterproof layer is the same as the lower edge of the armpit angle; the water stopping flange is tightly arranged below the steel ring piece at the lowest layer, and the vertical waterproof layer is made of waterproof coiled materials and seals the steel pipe and the axillary angle.
2. The plugging structure for a precipitation wellhead of a subway station according to claim 1, wherein the interval between any two steel ring pieces is 0.5m.
3. The plugging structure for a precipitation wellhead of a subway station according to any of claims 1-2, wherein the steel ring sheet is provided with a plurality of through holes.
4. A plugging structure for a precipitation wellhead of a subway station as claimed in claim 3, wherein the steel ring sheet surface is provided with a first rib protruding from the steel ring sheet surface.
5. The plugging structure for a precipitation wellhead of a subway station according to claim 1, wherein the surface of the steel plate is provided with a second rib protruding from the surface of the steel plate.
6. The plugging structure for a precipitation wellhead of a subway station according to claim 5, wherein the second ribs protrude 5mm from the surface of the steel plate.
7. The plugging structure for a precipitation wellhead of a subway station according to claim 1, wherein the axillary angle is in the shape of an inverted truncated cone.
8. The plugging structure for a precipitation wellhead of a subway station according to claim 1, wherein the steel pipe and/or the steel ring piece and/or the steel plate is/are made of Q235-B steel.
9. The plugging structure for a precipitation wellhead of a subway station according to claim 1, wherein the length of the steel pipe below the bottom of the bottom plate is twice the diameter of the steel pipe.
10. The plugging structure for a precipitation wellhead of a subway station according to claim 1, wherein the upper layer of steel bars and the lower layer of steel bars comprise a plurality of steel bars, the plurality of steel bars are arranged in a crisscross manner to form a crossing area, and the area of the crossing area is not smaller than that of the steel plate.
11. The plugging structure for a precipitation wellhead of a subway station according to claim 1, wherein the strength of the concrete inside the axillary angle is higher than the strength of the concrete inside the bottom plate.
12. The plugging structure for a precipitation wellhead of a subway station according to claim 1, wherein the concrete inside the axillary angle is micro-expansive concrete.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105951859A (en) * | 2016-05-31 | 2016-09-21 | 中国冶集团有限公司 | Treatment method of plugging water stop construction for foundation pit dewatering well to penetrate through concrete base plate of basement |
| CN207314370U (en) * | 2017-10-13 | 2018-05-04 | 中国新兴建筑工程总公司 | One kind sets basic drainage well extension tube structure |
| CN210658409U (en) * | 2019-09-06 | 2020-06-02 | 宁波市轨道交通集团有限公司建设分公司 | A block structure for subway station precipitation well head |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105951859A (en) * | 2016-05-31 | 2016-09-21 | 中国冶集团有限公司 | Treatment method of plugging water stop construction for foundation pit dewatering well to penetrate through concrete base plate of basement |
| CN207314370U (en) * | 2017-10-13 | 2018-05-04 | 中国新兴建筑工程总公司 | One kind sets basic drainage well extension tube structure |
| CN210658409U (en) * | 2019-09-06 | 2020-06-02 | 宁波市轨道交通集团有限公司建设分公司 | A block structure for subway station precipitation well head |
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