CN113718808A - Precipitation structure for preventing underground structure from floating and construction method thereof - Google Patents
Precipitation structure for preventing underground structure from floating and construction method thereof Download PDFInfo
- Publication number
- CN113718808A CN113718808A CN202110838052.6A CN202110838052A CN113718808A CN 113718808 A CN113718808 A CN 113718808A CN 202110838052 A CN202110838052 A CN 202110838052A CN 113718808 A CN113718808 A CN 113718808A
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- drain pipe
- water
- layer
- plate
- pipe
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- 238000001556 precipitation Methods 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 239000002689 soil Substances 0.000 claims abstract description 17
- 239000004746 geotextile Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000004575 stone Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Images
Classifications
-
- 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
- E02D31/10—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 soil pressure or hydraulic pressure
- E02D31/12—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 soil pressure or hydraulic pressure against upward hydraulic pressure
Abstract
A precipitation structure for preventing an underground structure from floating upwards and a construction method thereof; comprises a water drain pipe, a water stop plate and a gravel filter layer; the drain pipe is arranged at the bottom of the water collecting well, and the lower end of the drain pipe extends into a soil body below the cushion layer; drainage channels are arranged on the side wall of the drainage pipe and the part in the soil body at intervals; an expanded concrete core is filled in the pipeline of the water drain pipe, and the top surface of the expanded concrete core is lower than the top end of the water drain pipe; a plugging plate is arranged in the water drain pipe and positioned on the top surface of the expanded concrete core; the drain pipe above the plugging plate is filled with sealing paste; the water stop plate is annular and is welded on the outer side wall of the water drain pipe; the gravel filter layer is filled around the water drain pipe, and the top surface of the gravel filter layer is flush with the bottom surface of the cushion layer; the outer side of the gravel filtering layer is wrapped with geotextile. The invention solves the technical problems that the traditional construction process of the floor reserved dewatering pipe well is complex, the leakage is easy to occur in the later period, and the dewatering well is damaged or stops running during the construction of the basement main body structure.
Description
Technical Field
The invention belongs to the technical field of construction of constructional engineering, and particularly relates to a precipitation structure for preventing an underground structure from floating upwards and a construction method thereof.
Background
With the development speed of real estate projects being increased, accidents such as basement floating, bottom plate punching damage and the like caused by underground water problems during construction are frequent, and the accidents are usually caused by the following reasons: 1. the precipitation well is damaged due to construction reasons, and precipitation cannot be carried out; 2. after the post-pouring belt is closed and the foundation pit fertilizer groove is backfilled, no precipitation measure is provided, meanwhile, the top plate of the garage is not covered with soil, and the garage structure is insufficient in anti-floating; 3. the value of the anti-floating water level is wrong, and the actual water level exceeds the anti-floating design water level.
The conventional floor reservation precipitation well has the construction process complicacy, the later stage easily takes place seepage scheduling problem at present, simultaneously because the management problem, the foundation ditch stage precipitation well is often damaged or the bring to rest during basement major structure construction.
Disclosure of Invention
The invention aims to provide a precipitation structure for preventing an underground structure from floating, and aims to solve the technical problems that the traditional construction process of a bottom plate reserved precipitation pipe well is complex, leakage is easy to occur in the later period, and the precipitation well is damaged or stops running during the construction of a basement main body structure.
In order to achieve the purpose, the invention adopts the following technical scheme.
A precipitation structure for preventing an underground structure from floating upwards is used for reducing the underground water level below a foundation slab; a water collecting well is arranged in the foundation bottom plate, and a cushion layer is arranged at the bottom of the foundation bottom plate; the precipitation structure comprises a water drain pipe, a water stop plate and a gravel filter layer; the drain pipe is arranged at the bottom of the water collecting well, and the lower end of the drain pipe extends into a soil body below the cushion layer; drainage channels are arranged on the side wall of the drainage pipe and the part in the soil body at intervals; the pipeline of the water drain pipe is filled with an expanded concrete core, and the top surface of the expanded concrete core is lower than the top end of the water drain pipe; a plugging plate is arranged in the pipeline of the water drain pipe and positioned on the top surface of the expanded concrete core; sealing paste is filled in the drain pipe above the blocking plate; the water stop plate is annular and is welded on the outer side wall of the water drain pipe; the gravel filter layer is filled around the drain pipe, and the top surface of the gravel filter layer is flush with the bottom surface of the cushion layer; the outer side of the gravel filtering layer is wrapped with geotextile.
Preferably, the pipe diameter of the water drain pipe is not less than 100mm, and the length of the lower end of the water drain pipe extending into the soil body below the cushion layer is not less than 600 mm.
Preferably, the drainage duct is an inclined duct, and the side wall of the drainage pipe is gradually inclined upwards from outside to inside; the distance between adjacent water drainage channels is 30 mm-35 mm.
Preferably, the plugging plates are connected with the water drain pipe in a welding mode, and the distance between the top ends of the plugging plates ranges from 50mm to 100 mm.
Preferably, the width of the water stop plate is not less than 100mm, and the distance between the water stop plate and the bottom of the water collecting well is 1/2 base plate thickness; the distance between the water stop plate and the cushion layer is 1/2 the thickness of the base bottom plate.
Preferably, the difference between the outer diameter and the inner diameter of the gravel filter layer is not less than 200 mm.
A construction method of a precipitation structure comprises the following steps.
The method comprises the following steps: manufacturing a macadam filter layer 3: the geotechnical cloth is used for wrapping graded macadam with the diameter of 10 mm-50 mm to serve as a macadam filtering layer 3, the height of the macadam filtering layer is not less than 600mm, and the diameter of the macadam filtering layer is not less than 500 mm.
Step two, embedding a gravel filter layer: and wrapping the geotextile with a gravel filter layer, and embedding the geotextile into a soil body before pouring the cushion layer.
Step three, pre-burying of a drain pipe: and a water drain pipe is inserted into the gravel filtering layer and fixed.
And step four, pouring concrete of the cushion layer and concrete of the foundation slab.
Step five, draining and decompressing: during construction, the underground water is drained through the drain pipe and pumped out, and the elevation of the underground water level is reduced.
Step six: plugging the drain pipe: after the basement roof earthing is accomplished, the outlet pipe is blocked with the expanded concrete core to adopt shutoff board and outlet pipe welding, guarantee the water proof effect.
And seventhly, embedding sealing paste above the plugging plate, and finishing construction.
Compared with the prior art, the invention has the following characteristics and beneficial effects.
1. The dewatering structure is simple in construction, the water drain pipe is directly embedded in the foundation slab structure, and maintenance is not needed; the precipitation structure leads water at the bottom of the foundation into the basement sump pit, so that the anti-floating effect is direct and effective, the cost is low, and no leakage risk exists after plugging; the device can effectively avoid the problem of anti-floating damage of the basement during construction.
2. The filter layer is composed of geotechnical cloth wrapped with graded broken stones with the diameter of 10 mm-50 mm and is placed in soil on the outer side of the water drain pipe; the steel plate is sealed, and when the water drain pipe is sealed, a steel plate and steel pipe welding method is adopted after the core is filled with the expanded concrete, so that the water-resisting effect is ensured; the factice is fully embedded, and the factice is fully embedded above the closed steel plate, so that the steel plate is prevented from rusting, and water seepage is isolated.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a precipitation structure in the present invention.
FIG. 2 is a schematic view showing the structure of a downcomer according to the present invention.
FIG. 3 is a schematic view of a horizontal sectional structure of a drainage pipe arranged in a gravel filtering layer according to the present invention.
Reference numerals: 1-a water drain pipe, 2-a water stop plate, 3-a gravel filter layer, 4-an expanded concrete core, 5-sealant, 6-a plugging plate, 7-a foundation slab, 8-a water collecting well, 9-a cushion layer, 10-a water drain hole and 11-geotextile.
Detailed Description
As shown in fig. 1-3, the precipitation structure for preventing the underground structure from floating up is used for lowering the ground water level below the foundation bottom plate 7; a water collecting well 8 is arranged in the foundation bottom plate 7, and a cushion layer 9 is arranged at the bottom of the foundation bottom plate 7; the precipitation structure comprises a water drain pipe 1, a water stop plate 2 and a gravel filter layer 3; the drain pipe 1 is arranged at the bottom of the water collecting well 8, and the lower end of the drain pipe 1 extends into a soil body below the cushion layer 9; drainage channels 10 are arranged on the side wall of the drainage pipe 1 and the part in the soil body at intervals; the interior of the water drain pipe 1 is filled with an expanded concrete core 4, and the top surface of the expanded concrete core 4 is lower than the top end of the water drain pipe 1; a plugging plate 6 is arranged in the pipeline of the water drain pipe 1 and positioned on the top surface of the expanded concrete core 4; the sealing paste 5 is filled in the drain pipe 1 above the blocking plate 6; the water stop plate 2 is annular and is welded on the outer side wall of the water drain pipe 1; the gravel filter layer 3 is filled around the drain pipe 1, and the top surface of the gravel filter layer 3 is flush with the bottom surface of the cushion layer 9; the outside of the gravel filter layer 3 is wrapped with geotextile 11.
In this embodiment, the pipe diameter of the drain pipe 1 is not less than 100mm, and the length of the lower end of the drain pipe 1 extending into the soil below the cushion layer 9 is not less than 600 mm.
In this embodiment, the drainage channel 10 is an inclined channel, and is inclined upward gradually from outside to inside on the side wall of the drainage pipe 1; the distance between adjacent water drainage channels 10 is 30 mm-35 mm.
In this embodiment, welded connection between shutoff board 6 and the outlet pipe 1, the interval between 6 tops of shutoff board is 50mm ~100 mm.
In this embodiment, the width of the water stop plate 2 is not less than 100mm, the distance between the water stop plate 2 and the bottom of the water collecting well 8 is 1/2 the thickness of the foundation slab 7, and the distance between the water stop plate 2 and the cushion layer 9 is 1/2 the thickness of the foundation slab 7.
In this embodiment, the difference between the outer diameter and the inner diameter of the gravel filter layer 3 is not less than 200 mm.
In this embodiment, the diameter of graded rubble in rubble filter layer 3 is 10mm ~50mm, and the thickness of rubble filter layer 3 is 600mm, and the diameter is 500 mm.
The construction method of the precipitation structure comprises the following steps.
The method comprises the following steps: manufacturing a macadam filter layer 3: the geotextile 11 is used for wrapping graded broken stones with the diameter of 10 mm-50 mm to serve as broken stone filtering layers 3, the height is not less than 600mm, and the diameter is not less than 500 mm.
Step two, embedding the gravel filter layer 3: and wrapping the geotextile 11 with the gravel filter layer 3, and pre-embedding the geotextile into a soil body before pouring the cushion layer 9.
Step three, pre-burying of the water drain pipe 1: the water drain pipe 1 is inserted into the gravel filter layer 3 and fixed.
And step four, pouring concrete of the cushion layer 9 and concrete of the foundation slab 7.
Step five, draining and decompressing: during construction, the underground water is discharged through the drain pipe 1 and pumped out, and the elevation of the underground water level is reduced.
Step six: plugging the drain pipe 1: after the basement roof earthing is accomplished, the outlet pipe 1 is blocked with the expanded concrete core 4 to adopt shutoff board 6 and outlet pipe 1 welding, guarantee the water proof effect.
And step seven, embedding sealing paste 5 above the plugging plate 6 until the construction is finished.
In this embodiment, before the step three, the drain pipe 1 is pre-buried, the manufacturing of the drain pipe 1 is performed: taking a galvanized steel pipe with the diameter not less than 100mm, wherein the length of the water filtering section is not less than 600mm, and carrying out quincunx hole forming on the water filtering section, wherein the hole diameter is 10mm, and the hole center distance is 30-35 mm; and welding a water stop plate 2 with the thickness of 3mm and the width of not less than 100mm on the steel pipe.
The above embodiments are not intended to be exhaustive or to limit the invention to other embodiments, and the above embodiments are intended to illustrate the invention and not to limit the scope of the invention, and all applications that can be modified from the invention are within the scope of the invention.
Claims (7)
1. A precipitation structure for preventing an underground structure from floating is used for reducing the underground water level below a foundation bottom plate (7) and preventing the foundation bottom plate (7) from floating; a water collecting well (8) is arranged in the foundation bottom plate (7), and a cushion layer (9) is arranged at the bottom of the foundation bottom plate (7); the method is characterized in that: the precipitation structure comprises a water drain pipe (1), a water stop plate (2) and a gravel filter layer (3); the drain pipe (1) is arranged at the bottom of the water collecting well (8), and the lower end of the drain pipe (1) extends into a soil body below the cushion layer (9); drainage channels (10) are arranged on the side wall of the drainage pipe (1) and the part of the drainage pipe in the soil body at intervals; the pipeline of the water drain pipe (1) is filled with an expanded concrete core (4), and the top surface of the expanded concrete core (4) is lower than the top end of the water drain pipe (1); a plugging plate (6) is arranged in the pipeline of the water drain pipe (1) and positioned on the top surface of the expanded concrete core (4); the sealing paste (5) is filled in the drain pipe (1) above the blocking plate (6); the water stop plate (2) is annular and is welded on the outer side wall of the water drain pipe (1); the gravel filtering layer (3) is filled around the drain pipe (1), and the top surface of the gravel filtering layer (3) is flush with the bottom surface of the cushion layer (9); the outer side of the gravel filter layer (3) is wrapped with geotextile (11).
2. A precipitation structure for preventing uplift of an underground structure according to claim 1, wherein: the pipe diameter of the drain pipe (1) is not less than 100mm, and the length of the lower end of the drain pipe (1) extending into the soil body below the cushion layer (9) is not less than 600 mm.
3. A precipitation structure for preventing uplift of an underground structure according to claim 1, wherein: the water drainage pore passage (10) is an inclined pore passage and is gradually inclined upwards from outside to inside on the side wall of the water drainage pipe (1); the distance between adjacent water drainage channels (10) is 30-35 mm.
4. A precipitation structure for preventing uplift of an underground structure according to claim 1, wherein: the plugging plate (6) is connected with the drain pipe (1) in a welding mode, and the distance between the top ends of the plugging plates (6) ranges from 50mm to 100 mm.
5. A precipitation structure for preventing uplift of an underground structure according to claim 1, wherein: the width of the water stop plate (2) is not less than 100mm, and the distance between the water stop plate (2) and the bottom of the water collecting well (8) is 1/2 of the thickness of the foundation bottom plate (7); the distance between the water stop plate (2) and the cushion layer (9) is 1/2 the thickness of the foundation bottom plate (7).
6. A precipitation structure for preventing uplift of an underground structure according to claim 1, wherein: the difference between the outer diameter and the inner diameter of the gravel filtering layer (3) is not less than 200 mm.
7. A method of constructing a precipitation structure according to any one of claims 1-6, characterised in that it comprises the steps of:
the method comprises the following steps: manufacturing a macadam filter layer (3): the method comprises the following steps of wrapping graded macadam with the diameter of 10 mm-50 mm by using geotextile (11) to serve as a macadam filtering layer (3), wherein the height of the macadam filtering layer (3) is not less than 600mm, and the diameter of the macadam filtering layer (3) is not less than 500 mm;
step two, embedding a gravel filter layer (3): wrapping the geotextile (11) with the gravel filter layer (3), and pre-embedding the geotextile in a soil body before pouring the cushion layer (9);
step three, pre-burying of a drain pipe (1): a water drain pipe (1) is inserted into the gravel filtering layer (3) and fixed;
pouring concrete of the cushion layer (9) and concrete of the foundation slab (7);
step five, draining and decompressing: during construction, underground water is discharged through the drain pipe (1) and pumped out, and the elevation of the underground water level is reduced;
step six: plugging the drain pipe (1): after the basement roof is covered with soil, the water drain pipe (1) is blocked by the expanded concrete core (4), and the blocking plate (6) is welded with the water drain pipe (1) to ensure the water-resisting effect;
and seventhly, embedding sealing paste (5) above the plugging plate (6) until the construction is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110838052.6A CN113718808A (en) | 2021-07-23 | 2021-07-23 | Precipitation structure for preventing underground structure from floating and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110838052.6A CN113718808A (en) | 2021-07-23 | 2021-07-23 | Precipitation structure for preventing underground structure from floating and construction method thereof |
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|---|---|
| CN113718808A true CN113718808A (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110838052.6A Pending CN113718808A (en) | 2021-07-23 | 2021-07-23 | Precipitation structure for preventing underground structure from floating and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855846A (en) * | 2022-06-08 | 2022-08-05 | 贵州建工兴印建筑工程有限公司 | Underground seepage-proofing pressure-reducing anti-floating blind pipe structure and construction method thereof |
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2021
- 2021-07-23 CN CN202110838052.6A patent/CN113718808A/en active Pending
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| JP2004068485A (en) * | 2002-08-08 | 2004-03-04 | Sakamoto Shokai:Kk | Method of forcedly removing surface water in deep well construction method |
| CN102418380A (en) * | 2011-10-10 | 2012-04-18 | 四川大学 | Design for sludge deposition nest |
| CN204530733U (en) * | 2015-03-08 | 2015-08-05 | 青岛一建集团有限公司 | Underground construction deep-well precipitation well head plugging structure |
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| CN114855846A (en) * | 2022-06-08 | 2022-08-05 | 贵州建工兴印建筑工程有限公司 | Underground seepage-proofing pressure-reducing anti-floating blind pipe structure and construction method thereof |
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Application publication date: 20211130 |
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