CN1053246C - Construction method and device using large open caisson lowering water level in high-storied buiding and under ground engineering - Google Patents
Construction method and device using large open caisson lowering water level in high-storied buiding and under ground engineering Download PDFInfo
- Publication number
- CN1053246C CN1053246C CN 94111862 CN94111862A CN1053246C CN 1053246 C CN1053246 C CN 1053246C CN 94111862 CN94111862 CN 94111862 CN 94111862 A CN94111862 A CN 94111862A CN 1053246 C CN1053246 C CN 1053246C
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- pit shaft
- well
- well casing
- cutting edge
- open caisson
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Earth Drilling (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The present invention relates to a construction method and a device using large open caisson for lowering a water level in high buildings and underground engineering. The cutting edge of an open caisson and a well casing are cast on a well point near a foundation pit in construction, earth in the well casing is dug, and the well casing is simultaneously dug and cast; underground seepage water in the well casing is pumped by a water pump; the well casing is dug for 2m to 3m below the foundation bottom surface; in corresponding devices, the inner side and the outer side of the lower end of the cutting edge are fixedly provided with steel plates to form a cutting edge shape; the outer side of the well casing forms a cone shape, and the inner side is vertical; the well casing and the cutting edge are provided with permeation holes. The present invention has the advantages of water-lowering investment saving, abandoned well prevention, convenient construction for small places, simple construction equipment, high efficiency and short construction period.
Description
The present invention relates to the job practices and the device of the salty greatly well precipitation of the job practices of precipitation in a kind of building operations and the underground construction, particularly highrise building and underground construction utilization.
At present, because urban land lacks, excavate more and more to highrise building, Tall Building Foundation embedding darker, generally below groundwater table, guarantee that soil excavation, sole plate and the body of wall cast and the waterproof construction etc. of these engineerings carry out smoothly, reliable dewatering measure must be arranged.Existing precipitation means are motor-pumped well precipitation, promptly at a lot of mouthfuls of motor-pumped wells of building arranged around.Because motor-pumped well bore and infiltration capacity are little, guarantee that dry season and wet season all can drop to groundwater table below the sole plate face, have only the many mouthfuls of precipitation motor-pumped wells of layout.Like this, the investment that not only digs a well is big, and in the place narrow or adjacent have building or underground have under the obstruction situation can't arrange the well point.
Simultaneously, the unshielded structure of motor-pumped well scrap motor-pumped well once meeting drift sand, have increased investment cost.
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art part, a kind of quantity, bore, degree of depth that open caisson can be set according to the situation of underground buried depth of highrise building and water yield is provided, to guarantee highrise building and the requirement of underground construction precipitation, make the investment of highrise building and underground construction precipitation little, anti-destructive power is strong, is not subjected to the job practices and the device of the big salty well precipitation of place restriction
Solution of the present invention is: the job practices of the salty greatly well precipitation of highrise building and underground construction utilization is carried out according to the following steps:
A, locate to arrange the precipitation well point at distance building 4～6;
B, on the well point of design arrangement, cast-in-place caisson cutting edge and pit shaft more than 2 meters carry out shoveling work then in pit shaft;
C, when excavation, adopt that the limit is dug, the cast-in-place pit shaft in limit, its method of digging is center balanced the bottom of a pan circular arc that scrapes out 20 °～36 ° around the sword pin in the pit shaft earlier;
In d, the pit shaft water pumper is set, pump drainage goes out the underground percolating water of building foundation, until pit shaft sinks to following 2～3 meters of bottom surface, building foundation.
The device that the job practices of the salty greatly well precipitation of highrise building of the present invention and underground construction utilization is used, be characterized in that this device comprises open caisson, the medial and lateral, caisson cutting edge lower end of being poured into a mould are fixed with steel plate, steel plate makes sword underfooting end form edge of a knife shape, its open caisson pit shaft outside is taper (up-small and down-big), it is inboard vertical, and sword pin and pit shaft are provided with the infiltration hole.Be the inboard fixing steel plate of sword pin, and make it become edge of a knife shape, help reducing sword foot head and soil contact friction force, be convenient to whole well-sinking.Make the open caisson pit shaft outside be taper (up-small and down-big), inboard vertical, reduce the borehole wall and soil friction resistance on the one hand, do not reduce the well head internal diameter on the other hand, be convenient to constructing operation.
The present invention's advantage compared with prior art: but since under the present invention base area water yield quantity, bore and the degree of depth of open caisson are set, adopt in the construction that the limit is dug, the cast-in-place pit shaft in limit, mainly operation in pit shaft of the process that digs a well, so overcome motor-pumped well precipitation deficiency, limited by the place, the shortcoming of easy subscription rate.The experiment proved that the present invention compares under equal project situation with motor-pumped well precipitation, has the following advantages:
A, open caisson quantity are few, can save the construction investment about 90% of precipitation;
B, salty greatly well head footpath and infiltration capacity are big, are convenient to observe groundwater table, are convenient to adjust flexibly the facility quantity of drawing water in wet season and dry season;
C, can effectively prevent drift sand and obstruction (big erratic boulder) disused well;
D, reduce well point quantity, though narrow and small and be adjacent under the situation of building in the place, also can the flexible arrangement well point, to closing on building depression can not take place thus;
E, construction equipment are simple, and facility and earth-moving equipment only need draw water.
Simultaneously, the pit shaft that the setting of sword of the present invention underfooting end and the outside are taper can reduce frictional resistance, improves work efficiency thereby help well-sinking, and the construction period is short, and sword pin and pit shaft are provided with the infiltration hole, make the open caisson seepage of water good.
Figure is the cross-sectional view of sword pin of the present invention and pit shaft.
The present invention can further specify in conjunction with the embodiments: the job practices of the salty greatly well precipitation of highrise building and underground construction utilization is carried out according to the following steps:
A, the well point is arranged at 4～6 meters around the high-rise building;
B, on the well point of arranging, cast-in-place caisson cutting edge and pit shaft more than 2 meters carry out shoveling work then in pit shaft;
C, when excavation, adopt that the limit is dug, the cast-in-place pit shaft in limit, its method of digging is center balanced the bottom of a pan circular arc that scrapes out 35 ° around the sword pin in the pit shaft earlier;
In d, the pit shaft water pumper is set, pump drainage goes out the underground percolating water of building foundation, until pit shaft sinks to following 2～3 meters of bottom surface, building foundation.
Sword pin and pit shaft embodiment be as shown in the figure: be fixed with steel plate 2 on the medial and lateral of sword pin 1 lower end, make sword pin 1 lower end form edge of a knife shape, inboard fixing steel plate 2 is 50 °～60 ° with the angle of horizontal plane; Pit shaft 3 outsides are taper, and taper is up-small and down-big, and are inboard vertical, have infiltration hole 4 on sword pin 1 and the pit shaft 3.
Claims (3)
1, the job practices of the salty greatly well precipitation of a kind of highrise building and underground construction utilization is characterized in that carrying out according to the following steps:
A, arrange the precipitation well point at 4～6 meters of distance building;
B, on the well point of design arrangement, cast-in-place caisson cutting edge and pit shaft more than 2 meters carry out shoveling work then in pit shaft;
C, excavation are right, adopt that the limit is dug, the cast-in-place pit shaft in limit, and its method of digging is center balanced the bottom of a pan circular arc that scrapes out 20 °～36 ° around the sword pin in the pit shaft earlier;
In d, the pit shaft water pumper is set, pump drainage goes out the underground percolating water of building foundation, until pit shaft sinks to following 2～3 meters of bottom surface, building foundation.
2, the device used of the job practices of the salty greatly well precipitation of a kind of highrise building as claimed in claim 1 and underground construction utilization, it is characterized in that this device comprises open caisson, this caisson cutting edge (1) medial and lateral, lower end are fixed with steel plate (2), make sword pin (1) lower end form edge of a knife shape, its open caisson pit shaft (3) outside be that up-small and down-big taper is inboard vertical, and sword pin (1) and pit shaft (3) are provided with the hole (4) of seeping water.
3, the device of using according to the job practices of described highrise building of claim 2 and the salty greatly well precipitation of underground construction utilization is characterized in that the inboard fixing steel plate (2) of sword pin (1) becomes 50 °～60 ° angles with horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111862 CN1053246C (en) | 1994-08-01 | 1994-08-01 | Construction method and device using large open caisson lowering water level in high-storied buiding and under ground engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111862 CN1053246C (en) | 1994-08-01 | 1994-08-01 | Construction method and device using large open caisson lowering water level in high-storied buiding and under ground engineering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1116262A CN1116262A (en) | 1996-02-07 |
| CN1053246C true CN1053246C (en) | 2000-06-07 |
Family
ID=5035691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94111862 Expired - Fee Related CN1053246C (en) | 1994-08-01 | 1994-08-01 | Construction method and device using large open caisson lowering water level in high-storied buiding and under ground engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1053246C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418573B (en) * | 2008-01-24 | 2012-09-05 | 丁慈鑫 | Caisson structure and method for smoothly and accurately sinking caisson structure into earth surface |
| CN106759372A (en) * | 2016-11-12 | 2017-05-31 | 中国二十二冶集团有限公司 | Deep basal pit bank protection, the construction method of precipitation integrated construction nearer apart from side slope |
| CN109487809B (en) * | 2018-12-06 | 2023-11-07 | 中信重工机械股份有限公司 | Open caisson cutting edge with sealing brush |
| CN110144881A (en) * | 2019-05-10 | 2019-08-20 | 中国建筑西南勘察设计研究院有限公司 | One kind is drowned oneself type precast hollow friction pile and its construction method |
| CN115341565A (en) * | 2022-08-08 | 2022-11-15 | 浙江大学建筑设计研究院有限公司 | Recyclable steel pipe dewatering well device with replaceable filter material and construction method |
-
1994
- 1994-08-01 CN CN 94111862 patent/CN1053246C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1116262A (en) | 1996-02-07 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |