CN101936010B - Construction method of dewatering well in underground concrete structure - Google Patents
Construction method of dewatering well in underground concrete structure Download PDFInfo
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- CN101936010B CN101936010B CN2010102570694A CN201010257069A CN101936010B CN 101936010 B CN101936010 B CN 101936010B CN 2010102570694 A CN2010102570694 A CN 2010102570694A CN 201010257069 A CN201010257069 A CN 201010257069A CN 101936010 B CN101936010 B CN 101936010B
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- precipitation
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- dewatering
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Abstract
The invention discloses a closing method of a dewatering well in an underground structure, which is used for a dewatering well arranged at the bottom of the underground structure in a foundation pit. The method comprises the following steps of: arranging a dewatering pipe in the dewatering well, connecting the lower port of the dewatering pipe with a water pump, drawing out the upper port of the dewatering pipe from one side through the inside of a concrete base plate to be cast, moving the upper port of the dewatering pipe upwards along the foundation pit, and placing in a position higher than the underground water level; or drawing the upper port of the dewatering pipe through the inside of the concrete base plate to be cast, moving upwards with a concrete wall to be cast, which is connected with the concrete base plate into a whole, placing in a position higher than the underground water level, then starting a water pump to carry out dewatering operation, casting the concrete base plate and a side wall, stopping the dewatering operation after the concrete is set to a specified strength, and finally blocking the upper port of the dewatering pipe. The invention not only reduces the groundwater pressure at the closing part of the dewatering well, but also simplifies the closing process of the water drain pipe, thereby avoiding the water leakage of the structure as a result of the incorrect closing of the water drain pipe.
Description
Technical field
The present invention relates to keep in a kind of building trade the dry job practices of underground foundation structure, specifically, relate to keep the dry job practices of underground foundation structure through stoping and blocking underflow in the underground concrete structure.
Background technology
Along with the increase of highrise building, underground construction in the building operations now is because more and more, and a lot of construction point groundwater table are higher, and for satisfying construction requirement, well-points dewatering need be carried out in the job site.For realizing precipitation, in the underground concrete structure scope, arrange the precipitation well usually, and before underground structure has not been constructed, can not stop precipitation.The base plate construction of treating underground structure finishes, and promptly concrete reaches after certain intensity, can stop the precipitation operation in the precipitation well, then the precipitation well is carried out sealing operation.
At present conventional sealing operation method is: the downcomer of precipitation well (gutter) directly is drawn out to inside configuration from sole plate, treats that the back cover construction finishes, bottom board concrete reaches and begin to stop precipitation after certain intensity and carry out the occlusion catheter port again.Because the underground water bearing capacity is big, this job practices has careless omission to cause structure to leak because of gutter seals to deal with improperly slightly.Particularly when the high bearing capacity of underground water level is big, Chang Yin seals concrete and does not reach intensity and bear and do not live phreatic pressure, and perhaps the new and old concrete of sealing part connects stubble and closely do not cause structure to leak, and this situation is in case be difficult to handle perfect.
Summary of the invention
The technical problem that the present invention will solve provides the job practices of precipitation well in a kind of underground concrete structure; Not only can reduce the groundwater pressure of precipitation well sealing part; And make downcomer to seal processing simpler and easy, thereby avoided dealing with the structure drainage that occurs improperly because of downcomer seals.
In order to solve the problems of the technologies described above, the present invention is achieved through following technical scheme:
The job practices of precipitation well in a kind of underground concrete structure, this method is carried out according to following steps:
A, foundation ditch are put the slope excavation, and inner bottom part is established the precipitation well in the hole;
B, in said precipitation well, downcomer is set, the lower port of said downcomer is connected with water pump, and the port of said downcomer is along drawing to a side in the concrete floor to be cast, and the back upwards is arranged to along foundation ditch and is higher than place, groundwater table plane;
C, startup water pump carry out precipitation;
D, enforcement concrete floor and side wall cast;
E, treat concrete setting, stop precipitation after reaching prescribed strength;
F, shutoff downcomer port are carried out outside backfill.
The method is applicable to that working as building adopts underground independent wall, when promptly wall outer side and foundation ditch have certain space.
Another kind of technical scheme of the present invention is:
The job practices of precipitation well in a kind of underground concrete structure, this method is carried out according to following steps:
A, excavation of foundation pit, inner bottom part is established the precipitation well in the hole;
B, in said precipitation well, downcomer is set; The lower port of said downcomer is connected with water pump; The port of said downcomer is along in the concrete floor to be cast, with concrete wall to be cast that the concrete floor one is connected in upwards be provided with and be higher than the groundwater table plane and locate;
C, startup water pump carry out precipitation;
D, enforcement concrete floor and side wall are built;
E, treat concrete setting, stop precipitation after reaching prescribed strength;
F, shutoff downcomer port.
The method is applicable to when building adopts diaphragm wall or cantilever pile supporting and protection structure, and promptly the body of wall outer wall is that supporting and protection structure is when linking to each other.
Further qualification as above-mentioned two kinds of schemes:
Said precipitation well hole cover steel plate, welding is not higher than the steel sleeve of bottom board concrete upper surface on the said steel plate, and said downcomer is inserted in the said steel sleeve.
Said downcomer is a hard plastic tube.
The invention has the beneficial effects as follows:
The present invention is " dredging " through changing " blocking up "; With conduit the downcomer of precipitation well is drawn out to structural outer from inside configuration; Not only reduced the groundwater pressure of precipitation well sealing part; And make downcomer to seal processing simpler and easy, thereby avoided dealing with the structure drainage that occurs improperly because of downcomer seals.
Description of drawings
Fig. 1 is the method for blocking sketch map of precipitation well in the prior art;
Fig. 2 is the job practices sketch map of first kind of situation of the present invention;
Fig. 3 is the job practices sketch map of second kind of situation of the present invention;
Fig. 4 is the structural representation that the present invention adds steel plate.
Among the figure: 1: water pump, 2: downcomer, 3: concrete floor, 4: concrete side wall, 5: precipitation well, 6: supporting and protection structure, 7: steel plate, 8: steel sleeve, 9: asphalt cement.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is made further detailed description:
The invention discloses the guiding mouth-sealing method of precipitation well in a kind of underground structure; It is the outside of the downcomer 2 of precipitation well 5 being guided to underground concrete structure by the inside of underground concrete structure; And extend to and be not less than groundwater table plane place; Treat the concrete setting of underground structure, stop pumping after reaching desired strength, last downcomer 2 mouth of pipe simple process.
As shown in Figure 2, when building adopts underground independent wall, when promptly wall outer side and foundation ditch had certain space, the underground concrete structure outside can formwork.At first foundation ditch is put the slope excavation, in bottom, foundation ditch hole precipitation well 5 is set.Downcomer 2 is set in the precipitation well 5; The lower port of downcomer 2 is connected with water pump 1; The port of downcomer 2 is drawn to a side along concrete floor to be cast 3 inside earlier; In the space until between concrete floor 3 outsides and foundation ditch, extend up to along foundation ditch afterwards and be higher than groundwater table plane place.Downcomer 2 should be along optimal path in the spill process, and so-called optimal path is at the shortest path that gets around under the bar prerequisite.
Start water pump 1, draw water through water pump 1 and carry out precipitation, carry out the underground structure construction then, implement concrete floor 3 and concrete side wall 4 cast, treat concrete setting, stop precipitation after reaching prescribed strength.
At last, water pump 1 is abandoned in precipitation well 5, in the port of underground concrete structure outside shutoff downcomer 2, the simple shutoff of port is handled, and carries out outside backfill.
As shown in Figure 3, when building employing diaphragm wall or cantilever pile supporting, during underground concrete structure inwall one side formwork, underground concrete side wall 4 is connected with supporting and protection structure 6, and the situation of the foregoing description 1 is not suitable for this structure.
At first excavation of foundation pit is provided with precipitation well 5 in bottom, foundation ditch hole.Downcomer 2 is set in the precipitation well 5; The lower port of downcomer 2 is connected with water pump 1; The port of downcomer 2 is along drawing in the concrete floor 3 to be cast; Cause and the concrete wall to be cast 4 that are connected with concrete floor 3 one, extend upward along concrete side wall 4 inside again, extend to and be higher than groundwater table plane place.Downcomer 2 should be along optimal path when drawing, and so-called optimal path is at the shortest path that gets around under the bar prerequisite.
Start water pump 1, draw water through water pump 1 and carry out precipitation, carry out the underground structure construction then, implement concrete floor 3 and concrete side wall 4 cast, treat concrete setting, stop precipitation after reaching prescribed strength.
At last, water pump 1 is abandoned in precipitation well 5, in the port of underground concrete structure outside shutoff downcomer 2, the simple shutoff of port is handled.
As shown in Figure 4, in above-mentioned two embodiment, concrete pours into precipitation well 5 when preventing concreting, can adopt the thick steel plate of 4mm or 6mm to be placed on well head as cover plate, and side edge thereof is wide to go out well head 100mm.The compressing gutter 2 that vibrates when preventing concreting, one section caliber of welding is slightly larger than the steel sleeve 8 of downcomer 2 on the cover plate, and downcomer 2 is inserted in the steel sleeve 8.Steel sleeve 8 must not descend the upper surface of concrete floor 3 above Ground, and its termination uses asphalt cement 9 or fluid sealant to seal.
In addition, when burying downcomer 2 underground, should reduce joint as far as possible, and guarantee that downcomer 2 is not destroyed when assembling reinforcement and mounting template.
Although combine accompanying drawing that the preferred embodiments of the present invention are described above; But the present invention is not limited to the above-mentioned specific embodiment, and the above-mentioned specific embodiment only is schematically, is not restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, can also make the concrete conversion of a lot of forms, these all belong within protection scope of the present invention.
Claims (4)
1. the job practices of precipitation well in the underground concrete structure is characterized in that this method is carried out according to following steps:
A, foundation ditch are put the slope excavation, and inner bottom part is established the precipitation well in the hole;
B, in said precipitation well, downcomer is set, the lower port of said downcomer is connected with water pump, and the port of said downcomer is along drawing to a side in the concrete floor to be cast, and the back upwards is arranged to along foundation ditch and is higher than place, groundwater table plane;
C, startup water pump carry out precipitation;
D, enforcement concrete floor and side wall cast;
E, treat concrete setting, stop precipitation after reaching prescribed strength;
F, shutoff downcomer port are carried out outside backfill.
2. the job practices of precipitation well in the underground concrete structure is characterized in that this method is carried out according to following steps:
A, excavation of foundation pit, inner bottom part is established the precipitation well in the hole;
B, in said precipitation well, downcomer is set; The lower port of said downcomer is connected with water pump; The port of said downcomer is along in the concrete floor to be cast, with concrete wall to be cast that the concrete floor one is connected in upwards be provided with and be higher than the groundwater table plane and locate;
C, startup water pump carry out precipitation;
D, enforcement concrete floor and side wall are built;
E, treat concrete setting, stop precipitation after reaching prescribed strength;
F, shutoff downcomer port.
3. the mouth-sealing method of precipitation well is characterized in that in a kind of underground structure according to claim 1 and 2, said precipitation well hole cover steel plate, and welding is not higher than the steel sleeve of bottom board concrete upper surface on the said steel plate, and said downcomer is inserted in the said steel sleeve.
4. the mouth-sealing method of precipitation well is characterized in that in a kind of underground structure according to claim 1 and 2, and said downcomer is a hard plastic tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102570694A CN101936010B (en) | 2010-08-19 | 2010-08-19 | Construction method of dewatering well in underground concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102570694A CN101936010B (en) | 2010-08-19 | 2010-08-19 | Construction method of dewatering well in underground concrete structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101936010A CN101936010A (en) | 2011-01-05 |
| CN101936010B true CN101936010B (en) | 2012-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102570694A Expired - Fee Related CN101936010B (en) | 2010-08-19 | 2010-08-19 | Construction method of dewatering well in underground concrete structure |
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| CN (1) | CN101936010B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162253B (en) * | 2011-05-07 | 2012-09-19 | 山东新城建工股份有限公司 | Precipitation construction method employing pipe embedded in deep foundation pits |
| CN102345301A (en) * | 2011-07-08 | 2012-02-08 | 天津二十冶建设有限公司 | New method for plugging dewatering well in basement |
| CN102434718B (en) * | 2011-09-08 | 2013-07-03 | 广东省基础工程公司 | Method for reinforcing originating end of push bench |
| CN103161171B (en) * | 2011-12-13 | 2015-09-30 | 中国二十冶集团有限公司 | The band pump shut-in well method of Dewatering by pressure reduction well |
| CN103161172B (en) * | 2012-05-29 | 2016-01-20 | 中国二十二冶集团有限公司 | Elevator shaft bottom precipitation construction method |
| CN103061351B (en) * | 2012-12-24 | 2015-08-26 | 华蓝设计（集团）有限公司 | Prevent the device that basement bottom board swells, seeps water |
| CN103806473B (en) * | 2014-03-12 | 2015-12-09 | 中国建筑西南勘察设计研究院有限公司 | Sluicing release float Structure |
| CN104032762B (en) * | 2014-06-06 | 2016-05-04 | 中建三局集团有限公司 | A kind of dewatering well gug device for base pit dewatering construction |
| CN105804105A (en) * | 2016-04-11 | 2016-07-27 | 任江涛 | Precipitation well, well sealing structure for precipitation well and well covering burying and sealing method for precipitation well |
| CN109736340B (en) * | 2019-02-22 | 2021-03-05 | 宁蔚蔚 | Dewatering device and method for guaranteeing integrity of cushion layer by reserving dewatering well on foundation slab |
| CN111980075A (en) * | 2019-05-22 | 2020-11-24 | 深圳市佰邦建筑设计顾问有限公司 | Basement anti-floating structure and construction method thereof |
| CN112709247B (en) * | 2021-01-20 | 2022-05-31 | 北京城建道桥建设集团有限公司 | Subway construction dewatering system and method for complex ground |
| CN113774942A (en) * | 2021-10-13 | 2021-12-10 | 中国电建集团贵阳勘测设计研究院有限公司 | Construction method for underwater bottom sealing of open caisson |
| CN115492143A (en) * | 2022-09-27 | 2022-12-20 | 同济大学建筑设计研究院(集团)有限公司 | Confined water drainage system and construction method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4260334A (en) * | 1976-02-11 | 1981-04-07 | Kelley Contract Dewatering Company | Ground dewatering system |
| JP2006169900A (en) * | 2004-12-17 | 2006-06-29 | Hikari Kiden Kogyo Kk | Underground water draining device, connecting pipe and method for draining underground water |
| CN101768976A (en) * | 2009-12-29 | 2010-07-07 | 中建城市建设发展有限公司 | Base pit dewatering and water saving device and construction method thereof |
-
2010
- 2010-08-19 CN CN2010102570694A patent/CN101936010B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4260334A (en) * | 1976-02-11 | 1981-04-07 | Kelley Contract Dewatering Company | Ground dewatering system |
| JP2006169900A (en) * | 2004-12-17 | 2006-06-29 | Hikari Kiden Kogyo Kk | Underground water draining device, connecting pipe and method for draining underground water |
| CN101768976A (en) * | 2009-12-29 | 2010-07-07 | 中建城市建设发展有限公司 | Base pit dewatering and water saving device and construction method thereof |
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| CN101936010A (en) | 2011-01-05 |
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Granted publication date: 20120208 Termination date: 20130819 |