CN115094930A - Auxiliary dewatering device and method for basement sump pit or elevator foundation pit - Google Patents
Auxiliary dewatering device and method for basement sump pit or elevator foundation pit Download PDFInfo
- Publication number
- CN115094930A CN115094930A CN202210850367.7A CN202210850367A CN115094930A CN 115094930 A CN115094930 A CN 115094930A CN 202210850367 A CN202210850367 A CN 202210850367A CN 115094930 A CN115094930 A CN 115094930A
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- Prior art keywords
- pit
- well pipe
- precipitation
- precipitation well
- basement
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001556 precipitation Methods 0.000 claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 47
- 239000010959 steel Substances 0.000 claims abstract description 47
- 240000004922 Vigna radiata Species 0.000 claims abstract description 15
- 235000010721 Vigna radiata var radiata Nutrition 0.000 claims abstract description 15
- 235000011469 Vigna radiata var sublobata Nutrition 0.000 claims abstract description 15
- 239000004576 sand Substances 0.000 claims abstract description 14
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 239000004677 Nylon Substances 0.000 claims description 15
- 229920001778 nylon Polymers 0.000 claims description 15
- 239000004927 clay Substances 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 11
- 239000003673 groundwater Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 2
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004078 waterproofing Methods 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses an auxiliary dewatering device and method for a basement sump or an elevator foundation pit, and relates to the technical field of foundation pit dewatering, wherein the auxiliary dewatering device comprises a steel sleeve, a dewatering well pipe and a water pump; the part of the wall of the steel sleeve below the substrate is provided with a plurality of first through holes; the precipitation well pipe is arranged in the steel sleeve, and a plurality of second through holes are formed in the part, below the substrate, of the pipe wall of the precipitation well pipe; mung bean sand is filled between the precipitation well pipe and the steel sleeve; the water pump is arranged in the precipitation well pipe, and the underground water in the well pipe can be discharged through the water pump pipe.
Description
Technical Field
The invention relates to the technical field of foundation pit dewatering, in particular to an auxiliary dewatering device and method for a basement sump or an elevator foundation pit.
Background
In the foundation ditch engineering field, to the condition that groundwater is located above the basement, can design precipitation well generally and reduce the water level of groundwater to be in a anhydrous environment in guaranteeing basement waterproofing and the major structure work progress. The basement is typically designed with a sump or pit that is lower in bottom than the basement floor. In actual engineering, under the influence of many-sided factors, the precipitation well of original design can fall groundwater to below the groundwater bottom plate, but can't fall groundwater to below sump pit or the elevator foundation ditch basement, leads to sump pit or elevator foundation ditch waterproof and major structure to be unable to be under construction then. Therefore, a method for treating the problems needs to be found out, and underground water at the position of a water collecting pit or an elevator foundation pit is pertinently drained.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an auxiliary precipitation device and an auxiliary precipitation method for a basement sump or an elevator foundation pit.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: an auxiliary precipitation device for a basement sump or an elevator foundation pit comprises a steel sleeve, a precipitation well pipe and a water pump; the part of the wall of the steel sleeve below the substrate is provided with a plurality of first through holes; the precipitation well pipe is arranged in the steel sleeve, and a plurality of second through holes are formed in the part, below the substrate, of the pipe wall of the precipitation well pipe; mung bean sand is filled between the precipitation well pipe and the steel sleeve; the water pump is arranged in the precipitation well pipe, and the underground water in the well pipe can be discharged through the water pump pipe.
On the basis of the technical scheme, the part of the pipe wall of the precipitation well pipe below the substrate is wrapped by a plurality of layers of nylon nets.
On the basis of the technical scheme, the nylon net is provided with three layers, and the mesh number is 40 meshes.
On the basis of the technical scheme, the nylon net is wrapped with the steel wire net.
On the basis of the technical scheme, the steel wire mesh is provided with a layer, and the mesh number is 10.
On the basis of the technical scheme, the ball float valve is arranged in the dewatering well pipe, and a water pump switch can be triggered according to the change of the water level in the dewatering well pipe to control underground water pumping.
On the basis of the technical scheme, clay balls are filled between the precipitation well pipe and the steel sleeve, and the clay balls are positioned above the mung bean sand; the top surface of the clay-filled ball portion is flush with the substrate.
On the basis of the technical scheme, the particle size of the mung bean paste is 2-3 mm.
The invention also provides an auxiliary precipitation method based on the auxiliary precipitation device, which comprises the following steps:
s1, drilling a hole downwards and digging soil on a basement base by using a handheld spiral drill or a digging-modified spiral drill;
s2, pressing the steel sleeve into the dug hole;
s3, installing a precipitation well pipe in the steel sleeve, wherein the part, below the substrate, of the pipe wall of the precipitation well pipe is sequentially wrapped by a nylon net and a steel wire net; mung bean sand and clay balls are sequentially filled between the precipitation well pipe and the steel sleeve;
s4, installing a water pump and a ball float valve in the dewatering well pipe, triggering a water pump switch by the ball float valve according to the water level change in the dewatering well pipe, controlling the pumping drainage of underground water, and lowering the underground water in a sump pit or an elevator foundation pit to be below a substrate;
and S5, excavating the earthwork in the water collecting pit or the elevator foundation pit by adopting small machinery or manpower.
The invention has the beneficial effects that:
(1) under the condition that an original precipitation system cannot meet precipitation requirements of a sump pit or an elevator foundation pit and cannot organize large precipitation well construction equipment for re-construction, the precipitation well is constructed by adopting a simple construction method, construction cost is low, and underground water level in the sump pit or the elevator foundation pit is effectively reduced.
(2) The sump pit or the elevator foundation pit is lower than the basement of a common basement, and the water can be lowered in a targeted manner, so that the construction of the sump pit or the elevator foundation pit in a waterless environment is ensured, the large-scale integral water lowering is avoided, and the construction cost is reduced. Meanwhile, transitional precipitation is avoided, and the safety influence on buildings, roads and pipelines around the foundation pit is reduced.
(3) Effectively reduce underground water in sump pit or elevator foundation ditch, provide dry environment for waterproof and main part construction, guaranteed construction quality.
(4) The steel sleeve on the outer side supports the hole wall after drilling, hole collapse can be avoided, and the steel sleeve has an especially obvious effect on sandy gravel stratum.
(5) The perforated steel sleeve, the dewatering well perforated pipe, the nylon net, the steel wire mesh and the mung bean sand construct a filtering system, and the sand content in water is well controlled on the premise of ensuring the dewatering effectiveness.
(6) The ball float valve in the precipitation well pipe can set the installation position according to the precipitation demand, then control groundwater precipitation position, also can realize automatic pump drainage.
Drawings
FIG. 1 is a schematic structural diagram of an auxiliary precipitation apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of the construction of a steel casing in an embodiment of the invention;
FIG. 3 is a schematic view of a construction of a precipitation well pipe according to an embodiment of the invention;
FIG. 4 is a diagram illustrating a state of step S1 in the auxiliary precipitation method according to the embodiment of the present invention;
FIG. 5 is a diagram illustrating a state of step S2 in the auxiliary precipitation method according to the embodiment of the present invention;
FIG. 6 is a state diagram illustrating the step S3 of the auxiliary precipitation method according to the embodiment of the present invention;
FIG. 7 is a state diagram illustrating the step S4 of the auxiliary precipitation method according to the embodiment of the present invention;
fig. 8 is a state diagram of step S5 of the auxiliary precipitation method according to the embodiment of the present invention.
Reference numerals are as follows:
1-basement;
2-a sump pit or an elevator pit;
3-steel casing pipe; 31-a first via; 32-mung bean paste; 33-clay balls;
4-a precipitation well pipe; 41-a second through hole; 42-nylon mesh; 43-steel wire mesh;
5, a water pump; 51-water pump pipes; 52-ball float valve.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout.
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a number" or "a number" means two or more unless explicitly specified otherwise.
The technical scheme and the beneficial effects of the invention are clearer and clearer by further describing the specific embodiment of the invention with the accompanying drawings of the specification. The embodiments described below are exemplary and are intended to be illustrative of the invention, but are not to be construed as limiting the invention.
Referring to fig. 1 to 3, an embodiment of the invention provides an auxiliary precipitation device for a basement sump or an elevator foundation pit, which comprises a steel casing pipe 3, a precipitation well pipe 4 and a water pump 5; the part of the pipe wall of the steel sleeve 3 below the base is provided with a plurality of first through holes 31, ∅ 25; it is ensured that groundwater enters the steel casing through the first through hole 31.
The precipitation well pipe 4 is arranged in the steel sleeve 3, and a part of the pipe wall of the precipitation well pipe 4 below the base is provided with a plurality of second through holes 41, ∅ 18; mung bean sand 32 is filled between the precipitation well pipe 4 and the steel sleeve 3 (the distance between the precipitation well pipe and the steel sleeve is 20 cm); specifically, the particle size of the mung bean paste 32 is 2-3 mm. Specifically, a clay ball 33 is filled between the precipitation well pipe 4 and the steel casing 3, and the clay ball 33 is positioned above the mung bean sand 32; the top surface of the portion filled with clay balls 33 is flush with the base. Referring to fig. 3, the part of the wall of the precipitation well pipe 4 below the base is wrapped with several layers of nylon mesh 42. Specifically, the nylon net 42 is provided with three layers, and the mesh number is 40 meshes. The nylon net 42 is wrapped with a steel wire mesh 43. In this embodiment, the steel wire mesh 43 is provided with a layer, and the mesh number is 10 meshes. The nylon net, the steel wire mesh and the mung bean sand construct a groundwater filtering system.
The water pump 5 is provided in the precipitation well pipe 4, and can discharge the groundwater in the well pipe through the water pump pipe 51. Specifically, a ball float valve 52 is arranged in the precipitation well pipe 4, and a switch of the water pump 5 can be triggered according to the water level change in the precipitation well pipe 4 to control the pumping and drainage of underground water.
The embodiment of the invention also provides an auxiliary precipitation method based on the auxiliary precipitation device, which comprises the following steps:
referring to fig. 4, step s1, drilling a hole downwards to dig soil on the basement 1 base by using a handheld auger or a digging-modified auger;
referring to fig. 5, step s 2. pressing the steel casing 3 into the dug hole;
referring to fig. 6, in step s3, installing a precipitation well pipe 4 in the steel sleeve 3, wherein the part of the pipe wall of the precipitation well pipe 4 below the substrate is sequentially wrapped with a nylon net 42 and a steel wire net 43; and mung bean sand 32 and clay balls 33 are sequentially filled between the precipitation well pipe 4 and the steel sleeve 3;
referring to fig. 7, step s4, installing a water pump 5 and a ball float valve 52 in the precipitation well pipe 4, wherein the ball float valve 52 triggers the water pump 5 to be switched according to the water level change in the precipitation well pipe 4, so as to control pumping drainage of underground water, and lower the underground water in the sump or the elevator foundation pit 2 to be below the substrate;
referring to fig. 8, step s5, excavating earth in the water collecting pit or the elevator pit 2 by using small machinery or manpower.
The method utilizes the original dewatering system to lower the underground water in the foundation pit to the position below the basement foundation plate, and the earthwork of the foundation pit is excavated to the basement foundation. And then, using an auxiliary dewatering method and an auxiliary dewatering device to drain underground water at the positions of the water collecting pit and the elevator foundation pit to the position below the foundation of the water collecting pit or the elevator foundation pit, and excavating earth to the bottom of the water collecting pit or the elevator foundation pit. After the groundwater is lowered below the foundation of the water collecting pit or the elevator foundation pit, the subsequent waterproof and main structure can be constructed in a dry environment.
In the description of the specification, reference to the description of "one embodiment", "preferably", "an example", "a specific example" or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention, and schematic representations of the terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (9)
1. The utility model provides an supplementary precipitation device for basement sump pit or elevator foundation ditch, includes steel casing pipe (3), its characterized in that: the device also comprises a precipitation well pipe (4) and a water pump (5); the part, below the substrate, of the pipe wall of the steel sleeve (3) is provided with a plurality of first through holes (31); the precipitation well pipe (4) is arranged in the steel sleeve (3), and a plurality of second through holes (41) are formed in the part, located below the base, of the pipe wall of the precipitation well pipe (4); mung bean sand (32) is filled between the precipitation well pipe (4) and the steel sleeve (3); the water pump (5) is arranged in the precipitation well pipe (4), and underground water in the precipitation well pipe can be discharged through the water pump pipe (51).
2. An auxiliary water lowering device for basement pit or elevator pit according to claim 1, characterized in that: the part of the pipe wall of the precipitation well pipe (4) below the base is wrapped with a plurality of layers of nylon nets (42).
3. An auxiliary water lowering device as defined in claim 2 for basement pit or pit of elevator, characterized in that: the nylon net (42) is provided with three layers, and the mesh number is 40 meshes.
4. An auxiliary precipitation device for basement sump or elevator pit as claimed in claim 2, wherein: the nylon net (42) is wrapped with a steel wire mesh (43).
5. An auxiliary precipitation device for basement sump or elevator pit as claimed in claim 4, wherein: the steel wire mesh (43) is provided with a layer, and the mesh number is 10 meshes.
6. An auxiliary water lowering device for basement pit or elevator pit according to claim 1, characterized in that: a float ball valve (52) is arranged in the precipitation well pipe (4), and a switch of a water pump (5) can be triggered according to the water level change in the precipitation well pipe (4) to control underground water pumping.
7. An auxiliary precipitation device for basement sump or elevator pit as claimed in claim 1, wherein: a clay ball (33) is filled between the precipitation well pipe (4) and the steel sleeve (3), and the clay ball (33) is positioned above the mung bean sand (32); the top surface of the portion filled with clay balls (33) is flush with the substrate.
8. An auxiliary water lowering device for basement pit or elevator pit according to claim 1, characterized in that: the particle size of the mung bean sand (32) is 2-3 mm.
9. An auxiliary precipitation method based on the auxiliary precipitation device of any one of claims 1 to 8, characterized by comprising the following steps:
s1, drilling a hole downwards to dig soil on the basement of the basement (1) by using a handheld spiral drill or a digging-changing spiral drill;
s2, pressing the steel sleeve (3) into the dug hole;
s3, installing a precipitation well pipe (4) in the steel sleeve (3), wherein the part, below the substrate, of the pipe wall of the precipitation well pipe (4) is sequentially wrapped with a nylon net (42) and a steel wire net (43); mung bean sand (32) and clay balls (33) are sequentially filled between the precipitation well pipe (4) and the steel sleeve (3);
s4, installing a water pump (5) and a ball float valve (52) in the precipitation well pipe (4), triggering a switch of the water pump (5) by the ball float valve (52) according to the water level change in the precipitation well pipe (4), controlling underground water pumping and draining, and reducing underground water in a water collecting pit or an elevator foundation pit (2) to be below a substrate;
and S5, excavating the earthwork in the water collecting pit or the elevator foundation pit (2) by adopting small machinery or manpower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210850367.7A CN115094930A (en) | 2022-07-19 | 2022-07-19 | Auxiliary dewatering device and method for basement sump pit or elevator foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210850367.7A CN115094930A (en) | 2022-07-19 | 2022-07-19 | Auxiliary dewatering device and method for basement sump pit or elevator foundation pit |
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| Publication Number | Publication Date |
|---|---|
| CN115094930A true CN115094930A (en) | 2022-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210850367.7A Pending CN115094930A (en) | 2022-07-19 | 2022-07-19 | Auxiliary dewatering device and method for basement sump pit or elevator foundation pit |
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| CN (1) | CN115094930A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050080022A (en) * | 2005-07-04 | 2005-08-11 | (주)도화구조 기술사무소 | Plumbing for draining underground water and controlled de-watering system with target water level using the plumbing |
| CN104452786A (en) * | 2014-11-14 | 2015-03-25 | 武汉一冶建筑安装工程有限责任公司 | Deep foundation pit elevator shaft sump dewatering construction method |
| CN205839779U (en) * | 2016-07-15 | 2016-12-28 | 中建八局第一建设有限公司 | A kind of sandy soil stratum base pit dewatering water level following catch pit structure |
| CN209066468U (en) * | 2018-10-31 | 2019-07-05 | 青岛建设集团有限公司 | A kind of base pit dewatering device |
| CN215857808U (en) * | 2021-09-10 | 2022-02-18 | 中电建建筑集团有限公司 | Foundation ditch drilling steel reinforcement cage precipitation well |
-
2022
- 2022-07-19 CN CN202210850367.7A patent/CN115094930A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050080022A (en) * | 2005-07-04 | 2005-08-11 | (주)도화구조 기술사무소 | Plumbing for draining underground water and controlled de-watering system with target water level using the plumbing |
| CN104452786A (en) * | 2014-11-14 | 2015-03-25 | 武汉一冶建筑安装工程有限责任公司 | Deep foundation pit elevator shaft sump dewatering construction method |
| CN205839779U (en) * | 2016-07-15 | 2016-12-28 | 中建八局第一建设有限公司 | A kind of sandy soil stratum base pit dewatering water level following catch pit structure |
| CN209066468U (en) * | 2018-10-31 | 2019-07-05 | 青岛建设集团有限公司 | A kind of base pit dewatering device |
| CN215857808U (en) * | 2021-09-10 | 2022-02-18 | 中电建建筑集团有限公司 | Foundation ditch drilling steel reinforcement cage precipitation well |
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