CN216788363U - Well head block structure of deep tube well - Google Patents

Well head block structure of deep tube well Download PDF

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Publication number
CN216788363U
CN216788363U CN202220312383.6U CN202220312383U CN216788363U CN 216788363 U CN216788363 U CN 216788363U CN 202220312383 U CN202220312383 U CN 202220312383U CN 216788363 U CN216788363 U CN 216788363U
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sand
coiled material
pipe well
cement pipe
layer
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陈旺
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China Construction Second Engineering Bureau Co Ltd
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China Construction Second Engineering Bureau Co Ltd
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Abstract

A wellhead plugging structure of a deep pipe well comprises a sand-free cement pipe well, a concrete cushion layer, a steel sleeve and a sealing cover; the sand-free cement pipe well is inserted into soil at the bottom of the foundation pit; the top of the sand-free cement pipe well is provided with waterproof sealing paste; sealing mortar is arranged at the joint of the sand-free cement pipe well and the top surface of the soil body; an SBS coiled material reinforcing layer and an asphalt waterproof coiled material layer are sequentially paved on the outer side of the sealing mortar from inside to outside; an SBS coiled material waterproof layer is arranged at the joint of the lower edge of the SBS coiled material reinforcing layer and the soil body; the concrete cushion is poured on the top of the soil body; the lower end of the steel sleeve is inserted into the sand-free cement pipe well, and waterproof mortar is filled in a gap between the steel sleeve and the asphalt waterproof coiled material layer; a support rod is arranged between the lowest water stop steel plate and the concrete cushion; a flange plate is arranged at the top of the steel sleeve; the sealing cover is plugged at the top of the flange plate, and a rubber ring is padded at the joint of the sealing cover and the flange plate. The utility model solves the technical problems of difficult foundation pit wellhead plugging and poor water stopping effect.

Description

Well head block structure of deep tube well
Technical Field
The utility model belongs to the technical field of civil engineering, and particularly relates to a wellhead plugging structure of a deep pipe well.
Background
In the deep foundation pit excavation of high-rise building basements, underground garages and civil air defense projects, the phenomena of quicksand and spring are possible to occur due to the permeation of underground water in soil, the soil at the bottom of the pit continuously surges along with the excavation, and side slopes continuously collapse, so that the earthwork excavation construction is influenced, the safety of adjacent buildings, structures and foundation pit supporting structures is influenced, and the normal construction and engineering quality of the building foundation is influenced.
At present, the deep foundation pit adopts the sand-free cement pipe deep well dewatering, and is widely applied to the fields of buildings, railways, culverts and the like, and the deep pipe well dewatering has the advantages of quick construction, large displacement, deep water lowering, good drainage effect and large well spacing. The deep pipe well is generally buried around the deep foundation pit, but when the area of the deep foundation pit is large, the deep pipe well is limited by the influence radius of the water-lowering depth, the buried depth of the pipe well and the precipitation, the pipe well needs to be buried in the foundation pit, but the plugging of the wellhead is the subject to be researched in the precipitation engineering of the deep pipe well.
Therefore, it is necessary to provide a construction method for plugging a wellhead of a deep tubular well to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a wellhead plugging structure of a deep pipe well, and aims to solve the technical problems of difficulty in plugging a foundation pit wellhead and poor water stopping effect.
In order to achieve the purpose, the utility model adopts the following technical scheme.
A wellhead plugging structure of a deep pipe well comprises a sand-free cement pipe well, a concrete cushion and a steel sleeve; also comprises a sealing cover; the sand-free cement pipe well is inserted into soil at the bottom of the foundation pit, and the top of the sand-free cement pipe well exceeds the top surface of the soil; the top of the sand-free cement pipe well is provided with waterproof sealing paste along the annular direction; sealing mortar is arranged at the joint of the top surfaces of the sand-free cement pipe well and the soil body; an SBS coiled material reinforcing layer and an asphalt waterproof coiled material layer are sequentially paved on the outer side of the sealing mortar from inside to outside; the lower edge of the SBS coiled material reinforcing layer extends to the top of the soil body; the upper edge of the asphalt waterproof coil material layer exceeds the top of the sand-free cement pipe well; an SBS coiled material waterproof layer is laid at the joint of the lower edge of the SBS coiled material reinforcing layer and the soil body along the annular direction; the inner edge of the SBS coiled material waterproof layer is connected with the lower edge of the asphalt waterproof coiled material layer; the concrete cushion layer is poured on the top of the soil body; the lower end of the steel sleeve is inserted into the sand-free cement pipe well, and waterproof mortar is filled in the gap between the steel sleeve and the asphalt waterproof coiled material layer and positioned at the top of the waterproof sealing paste; water stop steel plates are circumferentially arranged on the outer side of the steel sleeve at intervals in the vertical direction; support rods are arranged between the water stop steel plate at the lowest part and the concrete cushion layer at intervals along the circumferential direction; a flange plate is arranged at the top of the steel sleeve; the sealing cover is plugged at the top of the flange plate, and a rubber ring is arranged at the joint of the sealing cover and the flange plate in a padded mode.
Preferably, the section of the sealing mortar is in a right-angled triangle shape, the horizontal right-angled surface of the sealing mortar is arranged on the top surface of the soil body, and the vertical right-angled surface of the sealing mortar is attached to the side wall of the sand-free cement pipe well; the SBS coiled material reinforcing layer is laid on the inclined plane of the sealing mortar, and the upper edge of the SBS coiled material reinforcing layer is flush with the upper edge of the sealing mortar.
Preferably, the distance between the top of the sand-free cement pipe well and the concrete cushion layer is 200 mm-240 mm.
Preferably, the distance between the lower end of the steel sleeve and the sand-free cement pipe well is 200 mm-240 mm.
Preferably, the distance between the water stop steel plate positioned at the lowest part and the concrete cushion layer is 300 mm; the width of the water stop steel plate is not less than 100 mm.
Compared with the prior art, the utility model has the following characteristics and beneficial effects.
1. The wellhead plugging structure has simple construction process, adopts the prefabricated waterproof steel sleeve, welds the water-stopping steel plate and the water-stopping flange plate on the steel sleeve, inserts the waterproof steel sleeve into the sand-free cement pipe well before the construction of the reinforced concrete bottom plate under the condition of larger water inflow, and adopts sealing mortar, an SBS coiled material reinforced layer, an asphalt waterproof coiled material layer, waterproof sealing paste and waterproof mortar for comprehensive waterproofing; after the precipitation is stopped, the water is blocked at one time, the speed is high, the water stopping effect is good, the engineering construction quality is ensured, and the economic benefit and the social benefit are improved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Figure 1 is a schematic vertical section of a wellhead plugging structure of the present invention.
FIG. 2 is a schematic illustration of the present invention with a steel casing inserted in a sandless cement-lined well.
Fig. 3 is a schematic structural view of a support rod provided between a lowest water stop steel plate and a concrete pad in the present invention.
Reference numerals: 1-sealing cover, 2-rubber ring, 3-flange plate, 4-soil body, 5-steel sleeve, 6-water stop steel plate, 7-support rod, 8-sand-free cement pipe well, 9-concrete cushion layer, 10-bolt, 11-waterproof sealing paste, 12-asphalt waterproof coil layer, 13-waterproof mortar, 14-SBS coiled material reinforced layer, 15-SBS coiled material waterproof layer and 16-sealing mortar.
Detailed Description
As shown in fig. 1-3, the wellhead plugging structure of the deep pipe well comprises a sand-free cement pipe well 8, a concrete cushion 9 and a steel casing pipe 5; also comprises a sealing cover 1; the sand-free cement pipe well 8 is inserted into the soil body 4 at the bottom of the foundation pit, and the top of the sand-free cement pipe well 8 exceeds the top surface of the soil body 4; a waterproof sealant 11 is arranged on the top of the sand-free cement pipe well 8 along the annular direction; sealing mortar 16 is arranged at the joint of the sand-free cement pipe well 8 and the top surface of the soil body 4; an SBS coiled material reinforcing layer 14 and an asphalt waterproof coiled material layer 12 are sequentially paved on the outer side of the sealing mortar 16 from inside to outside; the lower edge of the SBS coiled material reinforcing layer 14 extends to the top of the soil body 4; the upper edge of the asphalt waterproof coil material layer 12 exceeds the top of the sand-free cement pipe well 8; an SBS coiled material waterproof layer 15 is laid at the joint of the lower edge of the SBS coiled material reinforcing layer 14 and the soil body 4 in the annular direction; the inner edge of the SBS coiled material waterproof layer 15 is connected with the lower edge of the asphalt waterproof coiled material layer 12; the concrete cushion 9 is poured on the top of the soil body 4; the lower end of the steel sleeve 5 is inserted into the sand-free cement pipe well 8, and waterproof mortar 13 is filled in the gap between the steel sleeve 5 and the asphalt waterproof coiled material layer 12 and positioned at the top of the waterproof sealing paste 11; the outer side of the steel sleeve 5 is provided with water stop steel plates 6 circumferentially at intervals in the vertical direction; support rods 7 are arranged between the water stop steel plate 6 at the lowest part and the concrete cushion 9 at intervals along the circumferential direction; the top of the steel sleeve 5 is provided with a flange 3; the sealing cover 1 is blocked at the top of the flange 3, and a rubber ring 2 is padded at the joint of the sealing cover 1 and the flange 3.
In the embodiment, the section of the sealing mortar 16 is in the shape of a right triangle, the horizontal right-angle surface of the sealing mortar 16 is arranged on the top surface of the soil body 4, and the vertical right-angle surface of the sealing mortar 16 is attached to the side wall of the sand-free cement pipe well 8; the SBS coil reinforcement layer 14 is laid on the slope of the sealing mortar 16, and the upper edge of the SBS coil reinforcement layer 14 is flush with the upper edge of the sealing mortar 16.
In this embodiment, the distance between the top of the sand-free cement pipe well 8 and the concrete cushion layer 9 is 200 mm to 240 mm.
In this embodiment, the distance between the lower end of the steel sleeve 5 and the sand-free cement pipe well 8 is 200 mm to 240 mm.
In this embodiment, the distance between the water-stop steel plate 6 positioned at the lowermost portion and the concrete cushion 9 is 300 mm; the width of the water stop steel plate 6 is not less than 100 mm.
In the embodiment, the flange plate 3 is connected with the sealing cover 1 through a bolt 10; the bolt 10 passes through the rubber ring 2.
In this embodiment, the outside diameter of the sand-free cement pipe well 8 is 380mm, the inside diameter is 320mm, and the outside diameter of the steel casing 5 is set to 300 mm.
In this embodiment, the waterproof sealant 11 is polyurethane waterproof sealant.
In this embodiment, the construction method of the wellhead plugging structure comprises the following steps.
Step one, constructing and maintaining the concrete cushion layer 9, and enabling the height of the 8-hole of the sand-free cement pipe well to be 220 mm higher than that of the concrete cushion layer 9 after the concrete cushion layer 9 has certain strength.
Step two, manufacturing a steel sleeve 5 on the ground outside the foundation pit, wherein the wall thickness of the steel sleeve 5 is 6.5 mm, inserting the lower part of the steel sleeve 5 into the sand-free cement pipe well 8, and welding two water stop steel plates 6 with the thickness of 4 mm on the outer side wall of the steel sleeve 5; the top of the steel sleeve 5 is welded with a flange plate 3 with the thickness of 10 mm, the width of the flange plate 3 is 100mm, 12 screw holes are formed in the flange plate 3, the diameter of each screw hole is 14 mm, and 10 matched bolts are arranged; a sealing cover 1 is arranged at the top of the steel sleeve 5, the thickness of the sealing cover 1 is 10 mm, a screw hole with the diameter of 14 mm is formed in the sealing cover 1, and the sealing cover is connected with the welded flange 3 through a bolt 10 during final well sealing; and a rubber ring 2 with the thickness of 6 mm is arranged between the sealing cover 1 and the flange plate 3.
And step three, after the steel sleeve 5 is manufactured, inserting the steel sleeve into an 8-port of the sand-free cement pipe well before binding the reinforcing steel bars of the foundation slab, welding a support rod 7 at the bottom of the water-stop steel plate 6 at the lowest side, enabling the distance between the water-stop steel plate 6 at the lowest side and the concrete cushion 9 to be 300mm, filling and embedding waterproof sealing paste 11 at the interface of the steel sleeve 5 and the sand-free cement pipe well 8 along the periphery, after the waterproof sealing paste 11 is dried, adopting waterproof mortar 13 to tightly fill the gap between the water-stop steel plate 6 and the sand-free cement pipe well 8, sealing the joint of the sand-free cement pipe well 8 and the concrete cushion 9 by using sealing mortar 16, and then manufacturing an SBS coiled material reinforcing layer 14 and an SBS coiled material waterproof layer 15.
And step four, after the SBS coiled material waterproof layer 15 around the pipe well is manufactured, manufacturing the asphalt waterproof coiled material layer 12 on the concrete cushion layer 9 to the position of the pipeline water stop steel plate 6 with the height of 300mm at the lowest side according to design requirements, sealing the head of the asphalt waterproof coiled material layer 12 by adopting hot melting, binding the reinforcing steel bars at the bottom of the foundation slab after the construction of the waterproof node structure of the joint part of the steel sleeve 5 and the sand-free cement pipe well 8 is completed, disconnecting the reinforcing steel bars at the bottom of the foundation slab at the pipe well, and arranging 2 phi 12 reinforcing ribs on each side until the construction is completed.

Claims (5)

1. A wellhead plugging structure of a deep pipe well comprises a sand-free cement pipe well (8), a concrete cushion layer (9) and a steel sleeve (5); the method is characterized in that: also comprises a sealing cover (1); the sand-free cement pipe well (8) is inserted into a soil body (4) at the bottom of the foundation pit, and the top of the sand-free cement pipe well (8) exceeds the top surface of the soil body (4); the top of the sand-free cement pipe well (8) is provided with waterproof sealing paste (11) along the annular direction; sealing mortar (16) is arranged at the joint of the top surfaces of the sand-free cement pipe well (8) and the soil body (4); an SBS coiled material reinforcing layer (14) and an asphalt waterproof coiled material layer (12) are sequentially paved on the outer side of the sealing mortar (16) from inside to outside; the lower edge of the SBS coiled material reinforcing layer (14) extends to the top of the soil body (4); the upper edge of the asphalt waterproof coiled material layer (12) exceeds the top of the sand-free cement pipe well (8); an SBS coiled material waterproof layer (15) is laid at the joint of the lower edge of the SBS coiled material reinforcing layer (14) and the soil body (4) along the annular direction; the inner edge of the SBS coiled material waterproof layer (15) is connected with the lower edge of the asphalt waterproof coiled material layer (12); the concrete cushion (9) is poured on the top of the soil body (4); the lower end of the steel sleeve (5) is inserted into the sand-free cement pipe well (8), and waterproof mortar (13) is filled in the gap between the steel sleeve (5) and the asphalt waterproof coiled material layer (12) and positioned at the top of the waterproof sealing paste (11); water stop steel plates (6) are circumferentially arranged on the outer side of the steel sleeve (5) at intervals in the vertical direction; supporting rods (7) are arranged between the water stop steel plate (6) at the lowest part and the concrete cushion (9) at intervals along the circumferential direction; the top of the steel sleeve (5) is provided with a flange plate (3); the sealing cover (1) is plugged at the top of the flange plate (3), and a rubber ring (2) is padded at the joint of the sealing cover (1) and the flange plate (3).
2. A wellhead plugging structure for a deep well according to claim 1, characterized in that: the section of the sealing mortar (16) is in a right-angled triangle shape, the horizontal right-angled surface of the sealing mortar (16) is arranged on the top surface of the soil body (4), and the vertical right-angled surface of the sealing mortar (16) is attached to the side wall of the sand-free cement pipe well (8); the SBS coiled material reinforcing layer (14) is laid on the inclined plane of the sealing mortar (16), and the upper edge of the SBS coiled material reinforcing layer (14) is flush with the upper edge of the sealing mortar (16).
3. A wellhead plugging structure for a deep well according to claim 1, characterized in that: the distance between the top of the sand-free cement pipe well (8) and the concrete cushion layer (9) is 200-240 mm.
4. A wellhead plugging structure for a deep well according to claim 1, characterized in that: the distance between the lower end of the steel sleeve (5) and the sand-free cement pipe well (8) is 200 mm-240 mm.
5. A wellhead plugging structure for a deep well according to claim 1, characterized in that: the distance between the water stop steel plate (6) positioned at the lowest part and the concrete cushion layer (9) is 300 mm; the width of the water stop steel plate (6) is not less than 100 mm.
CN202220312383.6U 2022-02-16 2022-02-16 Well head block structure of deep tube well Active CN216788363U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220312383.6U CN216788363U (en) 2022-02-16 2022-02-16 Well head block structure of deep tube well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220312383.6U CN216788363U (en) 2022-02-16 2022-02-16 Well head block structure of deep tube well

Publications (1)

Publication Number Publication Date
CN216788363U true CN216788363U (en) 2022-06-21

Family

ID=82018338

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220312383.6U Active CN216788363U (en) 2022-02-16 2022-02-16 Well head block structure of deep tube well

Country Status (1)

Country Link
CN (1) CN216788363U (en)

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