CN107975055A - Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method - Google Patents
Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method Download PDFInfo
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- CN107975055A CN107975055A CN201810045084.9A CN201810045084A CN107975055A CN 107975055 A CN107975055 A CN 107975055A CN 201810045084 A CN201810045084 A CN 201810045084A CN 107975055 A CN107975055 A CN 107975055A
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- 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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- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to civil construction technical field, particularly a kind of Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method.Dewatering construction in constructing especially suitable for Red Sandstone stratum deep footing groove enclosing structure.The present invention is using the individual well that different depth is set in foundation pit, individual well sets depth according to stepped distribution, individual well sets one drainage of foundation pit amount of depth and quantity to determine, by the contrast with traditional construction technique, light-duty well-points dewatering construction method dewatering effect can substantially accelerate construction progress soon, corollary equipment of constructing is few, and construction input is small, it is similar under the conditions of this technique Steel-bar Pile pore-forming time there was only the 40% of traditional full-sleeve construction technology.By this dewatering effect more than 95% can be improved by the water-stagnating effect of the verification present invention.
Description
Technical field
The present invention relates to civil construction technical field, particularly a kind of Red Sandstone stratum deep basal pit light-duty well-points dewatering construction
Method.Dewatering construction in constructing especially suitable for Red Sandstone stratum deep footing groove enclosing structure.
Background technology
Traditional Method on Dewatering of Foundation Pit in the deep foundation pit construction of Red Sandstone stratum there are dewatering effect reduce and it is of high cost
Problem, Red Sandstone stratum impurities in water or chiltern cost content are high, and the easy blocking pipeline of silt, silt causes pipeline to wear, silt
Loss also easily causes the subsidence of foundations.There are security risk.
The content of the invention
The present invention solves prior art deficiency and provides the Red Sandstone that a kind of precipitation is stable, earth formation is stable, of low cost
Stratum deep basal pit light-duty well-points dewatering construction method.
Technical solution is used by the present invention solves prior art problem：
A kind of Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method, includes the following steps：
A, excavation of foundation pit
Excavation of foundation pit is to away from stopping at substrate 2m；
B, prefabricated well point material
Light well point includes multigroup collector pipe and point well casing, and collector pipe is equipped with 4-8 light well point connector, light well point
Connector punches, tube wall outer layer covers gauze with putting well casing unicom on point well casing tube wall；
C, first time light well point is constructed
Steel pipe produces hydraulic pressure by the pump housing, and steel pipe water outlet is Flat-mouth type, the red yarn rock Cheng Jing of steel pipe hydroblasting；
D, quick insertion point well casing
It is flushed to up to after projected depth, extracts insertion point well casing after steel pipe out, point well casing is connected with light well point connector；
E, point-by-point construction
Repeat step C and D put position and are flushed into well and insertion point well casing one by one, and point well casing is by light well point connector with catchmenting
Pipe connects, and collector pipe produces pressure precipitation by the pump housing.
The red yarn rock well depth 4m of steel pipe hydroblasting in the step E.
Diameter of steel tube Ф 300mm in the step C, rinse the pump housing and select 3KW slush pumps.
Rinsed in the step D and E during red yarn rock Cheng Jing and constantly move up and down steel pipe, moving range is more than 50cm.
2~4m of spacing between every group of collector pipe in the step B, every group of collector pipe are equipped with 6 light well point connectors.
Spacing in the step B between light well point connector is 1~2m.
Extract insertion point well casing in 1 minute after steel pipe in the step D out.
Punched on the step B midpoints well casing tube wall, punch density gradually increases tube body from top to bottom, tube wall outer layer covers
Nylon material gauze.
Described 1~3 layer of nylon material gauze of step B tube walls outer layer covers.
Point well casing height in the step E on every group of collector pipe is different, point well casing 4~5m of altitude range, between adjacent tubes
Difference in height 0.5m.
Beneficial effects of the present invention are：
For the present invention using the individual well that different depth is set in foundation pit, individual well sets depth according to stepped distribution, individual well
One drainage of foundation pit amount of depth and quantity of setting determines, by the contrast with traditional construction technique, light-duty well-points dewatering construction side
Method dewatering effect can substantially accelerate construction progress soon, construction corollary equipment it is few, construction input it is small, it is similar under the conditions of this technique reinforcing bar
The stake pore-forming time only has the 40% of traditional full-sleeve construction technology.By this precipitation can be improved by the water-stagnating effect of the verification present invention
Effect more than 95%.
Brief description of the drawings
Fig. 1 is the collector pipe structure diagram of the present invention；
Fig. 2 is the point well casing structure diagram of the present invention；
Fig. 3 is the multiple spot construction schematic diagram of the present invention.
Embodiment
A kind of Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method, includes the following steps：
A, excavation of foundation pit
Excavation of foundation pit is to away from stopping at substrate 2m；
B, prefabricated well point material
Light well point includes multigroup collector pipe and point well casing, and collector pipe is equipped with 4-8 light well point connector, light well point
Connector punches, tube wall outer layer covers gauze with putting well casing unicom on point well casing tube wall；
C, first time light well point is constructed
Steel pipe produces hydraulic pressure by the pump housing, and steel pipe water outlet is Flat-mouth type, the red yarn rock Cheng Jing of steel pipe hydroblasting；
D, quick insertion point well casing
It is flushed to up to after projected depth, extracts insertion point well casing after steel pipe out, point well casing is connected with light well point connector；
E, point-by-point construction
Repeat step C and D put position and are flushed into well and insertion point well casing one by one, and point well casing is by light well point connector with catchmenting
Pipe connects, and collector pipe produces pressure precipitation by the pump housing.
The red yarn rock well depth 4m of steel pipe hydroblasting in the step E.
Diameter of steel tube Ф 300mm in the step C, rinse the pump housing and select 3KW slush pumps.
Rinsed in the step D and E during red yarn rock Cheng Jing and constantly move up and down steel pipe, moving range is more than 50cm.
2~4m of spacing between every group of collector pipe in the step B, every group of collector pipe are equipped with 6 light well point connectors.
Spacing in the step B between light well point connector is 1~2m.
Extract insertion point well casing in 1 minute after steel pipe in the step D out.
Punched on the step B midpoints well casing tube wall, punch density gradually increases tube body from top to bottom, tube wall outer layer covers
Nylon material gauze.
Described 1~3 layer of nylon material gauze of step B tube walls outer layer covers.
Point well casing height in the step E on every group of collector pipe is different, point well casing 4~5m of altitude range, between adjacent tubes
Difference in height 0.5m.
During construction, individual well steel pipe rinses well depth stabilization in 4m or so, so drawing individual well maximum effective precipitation depth
It is as shown in table 1 for 4m.Therefore light well point well depth, since Red Sandstone has the characteristic for meeting water softening, using high pressure water Cheng Jing, use 3KW
Slush pump provides high pressure water, uses Ф 300mm steel pipes into well equipment, the extruding of steel pipe one end, easy to produce high pressure, is protected in Flat-mouth type
Enough water pressures are demonstrate,proved to go out outside well red yarn rock is softened.Continuous movable steel pipe is answered to ensure that hole diameter is more than 300mm as far as possible during into well
And improve Completed advance rate.Turn off slush pump after well reaches requirement depth and quickly extract steel pipe, in time by prefabricated well casing
It is inserted into well, whole process requires speed ratio very fast, and anti-fluid stopping modeling dress Red Sandstone, which is flowed into well, causes stifled well.It can solve Red Sandstone
Stratum has weak water penetration, and crack is various, and causing sand layers top earthwork unloading (excavation), underground water by being gushed on crack, is applied afterwards
Work mechanical execution difficulty lamp problem.
Specific construction place individual well sets depth to set depth and quantity to be shown in Table 1 according to stepped distribution, individual well.The earthwork is opened
Dig to away from light well point is arranged after substrate 2m for the first time, it is big to arrange that light well point position should be arranged in water yield as far as possible for the first time
Place, average every group of 2~4m of ponding tube spacing, 6 light well points of every group of arrangement, each well spacing 1~2m is big in water yield
Place encryption arrangement.
1 individual well of table sets depth and quantity
After whole foundation pit is all covered with light well point, is dug after 2~3d of precipitation with the examination of digging machine small area, ensure the foundation pit water surface
Absolute altitude below substrate after can carry out last layer of earth excavation operation.Last layer of earth excavation is most important, direct shadow
Ring foundation bearing capacity.Due to precipitation, to start to occur after 1-1.5h Pit Discharge big, using subregion block-by-block digging mode, subregion
Domain sequence of excavation is as shown in Figure 2：Due to Red Sandstone height weathering, original state Red Sandstone runs into air after-tack Cheng Sha, is excavated to base
To ensure that base bearing capacity meets design requirement after the above 30cm of bottom, the clear bottom of bottom cushion advance pedestrian's work is being poured, is being removed soft
Change rock stratum, should continue precipitation in scale removal process avoids substrate soaked, and pours bottom cushion in time and carry out foundation pit back cover.By upper
The situation that foundation bearing capacity is less prone to local collapse can be effectively ensured in the method for stating.Multiple spot can be illustrated when constructing according to Fig. 3
Point-by-point construction.
Claims (10)
- A kind of 1. Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method, it is characterised in that include the following steps：A, excavation of foundation pitExcavation of foundation pit is to away from stopping at substrate 2m；B, prefabricated well point materialLight well point includes multigroup collector pipe and point well casing, and collector pipe is equipped with 4-8 light well point connector, light well point connector With a well casing unicom, put and punched on well casing tube wall, tube wall outer layer covers gauze；C, first time light well point is constructedSteel pipe produces hydraulic pressure by the pump housing, and steel pipe water outlet is Flat-mouth type, the red yarn rock Cheng Jing of steel pipe hydroblasting；D, quick insertion point well casingIt is flushed to up to after projected depth, extracts insertion point well casing after steel pipe out, point well casing is connected with light well point connector；E, point-by-point constructionRepeat step C and D put position and are flushed into well and insertion point well casing one by one, and point well casing is connected by light well point connector and collector pipe Connect, collector pipe produces pressure precipitation by the pump housing.
- A kind of 2. Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method according to claim 1, it is characterised in that The red yarn rock well depth 4m of steel pipe hydroblasting in the step E.
- A kind of 3. Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method according to claim 1, it is characterised in that Diameter of steel tube Ф 300mm in the step C, rinse the pump housing and select 3KW slush pumps.
- A kind of 4. Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method according to claim 1, it is characterised in that Rinsed in the step D and E during red yarn rock Cheng Jing and constantly move up and down steel pipe, moving range is more than 50cm.
- A kind of 5. Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method according to claim 1, it is characterised in that 2~4m of spacing between every group of collector pipe in the step B, every group of collector pipe are equipped with 6 light well point connectors.
- A kind of 6. Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method according to claim 5, it is characterised in that Spacing in the step B between light well point connector is 1~2m.
- A kind of 7. Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method according to claim 1, it is characterised in that Extract insertion point well casing in 1 minute after steel pipe in the step D out.
- A kind of 8. Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method according to claim 1, it is characterised in that Punched on the step B midpoints well casing tube wall, punch density gradually increases tube body from top to bottom, tube wall outer layer covers nylon material Gauze.
- A kind of 9. Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method according to claim 1, it is characterised in that Described 1~3 layer of nylon material gauze of step B tube walls outer layer covers.
- A kind of 10. Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method according to claim 1, it is characterised in that Point well casing height in the step E on every group of collector pipe is different, point well casing 4~5m of altitude range, difference in height between adjacent tubes 0.5m。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045084.9A CN107975055A (en) | 2018-01-17 | 2018-01-17 | Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810045084.9A CN107975055A (en) | 2018-01-17 | 2018-01-17 | Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method |
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| CN107975055A true CN107975055A (en) | 2018-05-01 |
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| CN201810045084.9A Pending CN107975055A (en) | 2018-01-17 | 2018-01-17 | Red Sandstone stratum deep basal pit light-duty well-points dewatering construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109537608A (en) * | 2018-11-26 | 2019-03-29 | 五冶集团上海有限公司 | A kind of method of precipitation in artificial digging pile stake |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051886A (en) * | 2011-01-24 | 2011-05-11 | 惠州市水电建筑工程有限公司 | Light well point drainage construction technology |
| CN104775443A (en) * | 2015-04-28 | 2015-07-15 | 金中天集团建设有限公司 | Well point dewatering method and device |
| CN106958255A (en) * | 2016-01-08 | 2017-07-18 | 孔祥瑞 | A kind of architectural engineering pit precipitation self-punching type pressure reduction well |
| CN107354951A (en) * | 2017-08-18 | 2017-11-17 | 交通运输部天津水运工程科学研究所 | A kind of light well point collector pipe and its application method available for hydraulic flushing in hole |
-
2018
- 2018-01-17 CN CN201810045084.9A patent/CN107975055A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051886A (en) * | 2011-01-24 | 2011-05-11 | 惠州市水电建筑工程有限公司 | Light well point drainage construction technology |
| CN104775443A (en) * | 2015-04-28 | 2015-07-15 | 金中天集团建设有限公司 | Well point dewatering method and device |
| CN106958255A (en) * | 2016-01-08 | 2017-07-18 | 孔祥瑞 | A kind of architectural engineering pit precipitation self-punching type pressure reduction well |
| CN107354951A (en) * | 2017-08-18 | 2017-11-17 | 交通运输部天津水运工程科学研究所 | A kind of light well point collector pipe and its application method available for hydraulic flushing in hole |
Non-Patent Citations (1)
| Title |
|---|
| 姜大力: "沿海砂性土质自吸泵井点降水施工技术", 《铁道建筑技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109537608A (en) * | 2018-11-26 | 2019-03-29 | 五冶集团上海有限公司 | A kind of method of precipitation in artificial digging pile stake |
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Application publication date: 20180501 |
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