CN109083175A - The cushion cap foundation pit and its construction method for having continuous drainage function - Google Patents
The cushion cap foundation pit and its construction method for having continuous drainage function Download PDFInfo
- Publication number
- CN109083175A CN109083175A CN201810966687.2A CN201810966687A CN109083175A CN 109083175 A CN109083175 A CN 109083175A CN 201810966687 A CN201810966687 A CN 201810966687A CN 109083175 A CN109083175 A CN 109083175A
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- Prior art keywords
- cushion cap
- pit
- outlet pipe
- cap foundation
- foundation pit
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- 238000010276 construction Methods 0.000 title claims abstract description 33
- 238000001914 filtration Methods 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 57
- 239000000463 material Substances 0.000 claims description 33
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000011083 cement mortar Substances 0.000 claims description 11
- 238000002955 isolation Methods 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 claims description 5
- 238000007569 slipcasting Methods 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 230000002045 lasting effect Effects 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 10
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 10
- 101150054854 POU1F1 gene Proteins 0.000 description 7
- 239000008188 pellet Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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
-
- 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
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/20—Restraining of underground water by damming or interrupting the passage of underground water by displacing the water, e.g. by compressed air
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of cushion cap foundation pit for having continuous drainage function and its construction methods, the bottom of cushion cap foundation pit is provided with catch pit, catch pit is connect by outlet pipe with the draining pump outside cushion cap foundation pit, and outlet pipe is embedded in cushion cap pouring layer and water resistant plate pouring layer；Internal layer filtering screen is provided in the catch pit, the water inlet end of the outlet pipe is located inside internal layer filtering screen.The function of realizing the draining of cushion cap foundation pit overall process, effectively reduces construction cost, and improve construction efficiency, this arrangement and method for construction is small by natural environment influence, and construction quality also more preferably controls.
Description
Technical field
The invention belongs to technical field of building construction, in particular to a kind of cushion cap foundation pit for having continuous drainage function and its
Construction method.
Background technique
Cushion cap pit water accumulation be always room build in class basement construction need in face of the problem of, for cushion cap foundation pit Yield rainfall relation,
Traditional approach be drained using immersible pump, but the fitness that immersible pump changes operating condition is poor, once encounter rainy, cushion cap
Foundation pit can continuous ponding, it is therefore desirable to which continuous pump drainage, labour's consumption is big, and cost is also very high, and to cushion cap subsequent construction shadow
Sound is larger, if processing is bad, or even influences whether waterproof effect.How by effective measures, construction quality both can guarantee,
Cost can be reduced again, is accelerated construction progress, it appears very urgent.
Summary of the invention
It is an object of the invention to: in view of the above-mentioned problems of the prior art, providing one kind has continuous drainage function
The cushion cap foundation pit and its construction method of energy, realize the effect of cushion cap foundation pit overall process drains, effectively reduce construction cost, and
Improve construction efficiency.
The technical solution of the technology of the present invention is achieved in that a kind of cushion cap foundation pit for having continuous drainage function, is holding
The bottom in stylobate hole is provided with catch pit, and catch pit is connect by outlet pipe with the draining pump outside cushion cap foundation pit, and outlet pipe
It is embedded in cushion cap pouring layer and water resistant plate pouring layer；Internal layer filtering screen is provided in the catch pit, the outlet pipe
Water inlet end is located inside internal layer filtering screen；The fitros bed of material is filled between the internal layer filtering screen and catch pit inner wall.
The cushion cap foundation pit of the present invention for having continuous drainage function, internal layer filtering screen bottom to catch pit bottom
The distance in portion is the 1/3 of catch pit height, and the top of internal layer filtering screen is located under catch pit edge, the top of the fitros bed of material
It is flushed with the edge of catch pit.
The cushion cap foundation pit of the present invention for having continuous drainage function is stamped one layer of isolation steel at the top of catch pit
Plate, isolation steel plate are provided with the through-hole passed through for outlet pipe.
The cushion cap foundation pit of the present invention for having continuous drainage function, the crater wall for being close to catch pit are also equipped with outer layer mistake
Screen cover, to stop sedendary soil, the fitros bed of material is between internal layer filtering screen and outer filter mesh enclosure.
The cushion cap foundation pit of the present invention for having continuous drainage function, the outlet pipe are pvc material, stretch out foundation pit
Outer top is connected with elbow, and elbow water outlet picks out extension tube and connect with draining pump.
Have the cushion cap foundation ditch construction method of continuous drainage function, described method includes following steps:
S1: complete cushion cap foundation pit original hole is excavated；
S2: a catch pit is excavated again in the bottom Yuan Keng of cushion cap foundation pit；
S3: installing internal layer filtering screen in catch pit, and outlet pipe water inlet end is inserted into the internal layer filter screen in catch pit
In cover, the water outlet of outlet pipe is picked out outside cushion cap foundation pit, and the filling between internal layer filtering screen and catch pit crater wall
The fitros bed of material；
S4: starting lasting ponding outlet, after stylobate of entertaining hole is dry, the carry out waterproof protective layer construction of sequence, and foundation pit
Steel mesh and water resistant plate bar frame facility work, and outlet pipe is fixed on steel mesh；
S5: one-piece casting foundation pit and water resistant plate, and carry out the maintenance of concrete.
The cushion cap foundation ditch construction method of the present invention for having continuous drainage function completes supporting for concrete in step S5
After protecting and reaching corresponding design strength, reversed slip casting is carried out to outlet pipe using cement mortar, so that cement mortar filling is full
The gap of fitros material and outlet pipe, cement mortar and fitros material form permanent water-tight concrete, and outlet conduit permanently stays in
In suspended deck structure.
The cushion cap foundation ditch construction method of the present invention for having continuous drainage function, in step s3, the outlet pipe
It is installed perpendicular to horizontal plane, and is provided with stability of one or more the vertical vertical bar to reinforce outlet pipe.
The cushion cap foundation ditch construction method of the present invention for having continuous drainage function, in step s3, in installation internal layer
Before filter screen, the crater wall for being first close to catch pit installs outer filter mesh enclosure, and fitros material is filled in internal layer filter screen and outer layer mistake
Between strainer.
The cushion cap foundation ditch construction method of the present invention for having continuous drainage function, in step s3, the fitros bed of material
It is flushed at the top of top and catch pit, stone layer filling to be filtered finishes, and covers one layer of isolation steel plate at the top of catch pit.
The invention has the benefit that realizing the function of cushion cap foundation pit overall process draining, construction cost is effectively reduced,
And construction efficiency is improved, this arrangement and method for construction is small by natural environment influence, and construction quality also more preferably controls.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of cushion cap foundation pit of the present invention；
Fig. 2 is the isolation steel plate structure schematic diagram of cushion cap foundation pit of the present invention；
Fig. 3 is the top view of catch pit of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The technology of the present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
As shown, having the cushion cap foundation pit of continuous drainage function, the bottom of cushion cap foundation pit 1 is provided with catch pit 2, collects
Puddle 2 is connect by outlet pipe 4 with the draining pump 5 outside cushion cap foundation pit 1, and outlet pipe 4 can be embedded in cushion cap pouring layer and resist
In water plate pouring layer.
Specifically, being provided with internal layer filtering screen 21 in the catch pit 2, the water inlet end of the outlet pipe 4 is located at internal layer
Inside filtering screen 21；The fitros bed of material 22 is filled between 2 inner wall of the internal layer filtering screen 21 and catch pit.The fitros material
The fitros material of layer 22 is the diameter that uniformly-graded, partial size 10-15mm, and the eyelet of internal layer filtering screen 21 are less than fitros.
The distance of 21 bottom of internal layer filtering screen to 2 bottom of catch pit is the 1/3 of 2 height of catch pit, internal layer filtering
The top of mesh enclosure 21 is located under 2 edge of catch pit, and the top of the fitros bed of material 22 is flushed with the edge of catch pit 2.
It is stamped one layer of isolation steel plate 23 at the top of catch pit 2, isolation steel plate 23 is provided with the through-hole passed through for outlet pipe 4
231, it can be fallen into the fitros bed of material 22 to avoid sedendary soil from top, so that the gap between fitros material is blocked.
The crater wall for being close to catch pit 2 is also equipped with outer filter mesh enclosure 24, to stop sedendary soil, the fitros bed of material 22
Between internal layer filtering screen 21 and outer filter mesh enclosure 24.Outer filter mesh enclosure 24 can effectively keep the structure of catch pit
Stablize, and further plays the purpose of filtering sedendary soil.Further, internal layer filtering screen 21 and outer filter mesh enclosure 24
It is cylinder, maximum hoop rigidity can be kept in this way, avoids being collapsed.
The outlet pipe 4 is installed perpendicular to horizontal plane, and the vertical vertical bar (not shown) for being provided with one or more is used
To reinforce the stability of outlet pipe 4.Before cushion cap foundation pit 1 pours, the tube bottom of outlet pipe 4 has from 21 bottom of internal layer filtering screen
To the freedom of movement at top.Requirement herein is, when between outlet pipe 4 and vertical vertical bar and subsequent laying steel mesh
Connection, be not be fixed, and can guarantee outlet pipe 4 bottom nozzle can the bottom and top of internal layer filtering screen 21 it
Between freely move up and down, in this way can according to operating condition needs, adjust height, to take the ponding at different depth away, until complete
At pouring for armored concrete, and it must assure that the bottom of outlet pipe 4 is located at the center of internal layer filtering screen 21 when pouring.
The outlet pipe 4 is PVC material, and the top stretched out outside cushion cap foundation pit 1 is connected with elbow 41,41 water outlet of elbow
It picks out extension tube 42 to connect with draining pump 5, the setting of elbow 41, can be convenient the connection of pipeline, and work as and reversely pour in the later period
When note, it is also more convenient to disassemble remaining pipeline.
The construction method of the above-mentioned cushion cap foundation pit for having continuous drainage function includes the following steps:
S1: complete cushion cap foundation pit 1 is excavated；
S2: a catch pit 2 is excavated again in the bottom of cushion cap foundation pit 1；
S3: installing internal layer filtering screen 21 in catch pit 2, and 4 water inlet end of outlet pipe is inserted into the internal layer mistake in catch pit
In screen cover 21, the water outlet of outlet pipe 4 is picked out outside cushion cap foundation pit, and is connect with draining pump 3, in internal layer filtering screen 21
The fitros bed of material 22 is packed between 2 crater wall of catch pit；
S4: starting lasting ponding outlet, after stylobate of entertaining hole 1 is dry, the carry out waterproof protective layer construction of sequence, and foundation pit
Steel mesh and water resistant plate bar frame facility work, and outlet pipe 4 is fixed on steel mesh；
S5: one-piece casting cushion cap foundation pit 1 and water resistant plate 3, and carry out the maintenance of concrete.
After completing the maintenance of concrete in step S5 and reaching corresponding design strength, using cement mortar to outlet pipe 4
Reversed slip casting is carried out, the gap of water pipe 4 and the fitros bed of material 22 so that cement mortar filling is overfilled, cement mortar is formed with fitros material
Permanent water-tight concrete, outlet pipe 4 permanently stay in suspended deck structure.
In step s3, the outlet pipe 4 is installed perpendicular to horizontal plane, and is provided with one or more vertical vertical bar (figure
In be not shown) to reinforce the stability of outlet pipe.
In step s3, before installing internal layer filter screen 21, the crater wall for being first close to catch pit 2 installs outer filter mesh enclosure
24, fitros material is filled between internal layer filter screen 21 and outer filter net 24.
In step s3, the top of the fitros bed of material 22 is flushed with the top of catch pit 2, and the filling of stone layer 22 to be filtered finishes,
One layer of isolation steel plate 23 is covered at the top of catch pit 2.
The cement mortar of reversed slip casting is impervious, cement mortar, component condition are as follows:
Additive: high performance water reducing agent of polyocarboxy acid, volume 1.5%；DX cement expansive material, volume 10%；
Cement: P.O42.5R；
Fine aggregate: Machine-made Sand, fineness modulus: 2.6；
Admixture: II grade of flyash；Fiber is split in SY-A resistance.
Match ratio is specially following table:
Fitros material can be uniformly-graded pellet, can also be non-homogeneous gradation pellet.When for non-homogeneous gradation pellet,
Specification is 5-25mm；Gradation composition see the table below:
| Serial number | Square hole sieve size (mm) | It is accumulative to tail over (%) (in mass) |
| 1 | 4.75 | 90~100 |
| 2 | 9.50 | 70~90 |
| 3 | 16.0 | 50~70 |
| 4 | 19.0 | 25~40 |
| 5 | 25.5 | 0~5 |
The pressure of reversed slip casting: 0.5~1.5MPa；Outlet pipe is pvc pipe, while being also reversed Grouting Pipe, and caliber is
50-60mm。
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of cushion cap foundation pit for having continuous drainage function, it is characterised in that: the bottom of cushion cap foundation pit is provided with catch pit,
Catch pit is connect by outlet pipe with the draining pump outside cushion cap foundation pit, and outlet pipe is embedded in cushion cap pouring layer and water resistant plate pours
It builds in layer；Internal layer filtering screen is provided in the catch pit, the water inlet end of the outlet pipe is located inside internal layer filtering screen；
The fitros bed of material is filled between the internal layer filtering screen and catch pit inner wall.
2. the cushion cap foundation pit according to claim 1 for having continuous drainage function, it is characterised in that: the internal layer filter screen
Cover bottom to catch pit bottom distance be catch pit height 1/3, the top of internal layer filtering screen be located at catch pit edge it
Under, the top of the fitros bed of material is flushed with the edge of catch pit.
3. the cushion cap foundation pit according to claim 2 for having continuous drainage function, it is characterised in that: at the top of catch pit
It is stamped one layer of isolation steel plate, isolation steel plate is provided with the through-hole passed through for outlet pipe.
4. the cushion cap foundation pit according to claim 2 for having continuous drainage function, it is characterised in that: be close to the hole of catch pit
Wall is also equipped with outer filter mesh enclosure, and to stop sedendary soil, the fitros bed of material is located at internal layer filtering screen and outer filter net
Between cover.
5. the cushion cap foundation pit according to claim 1 for having continuous drainage function, it is characterised in that: the outlet pipe is
Pvc material, the top stretched out outside foundation pit are connected with elbow, and elbow water outlet picks out extension tube and connect with draining pump.
6. a kind of cushion cap foundation ditch construction method for having continuous drainage function, which is characterized in that described method includes following steps:
S1: complete cushion cap foundation pit original hole is excavated；
S2: a catch pit is excavated again in the bottom Yuan Keng of cushion cap foundation pit；
S3: installing internal layer filtering screen in catch pit, and outlet pipe water inlet end is inserted into the internal layer filtering screen in catch pit,
The water outlet of outlet pipe picks out outside cushion cap foundation pit, and the filling fitros material between internal layer filtering screen and catch pit crater wall
Layer；
S4: start lasting ponding outlet, after stylobate of entertaining hole is dry, the carry out waterproof protective layer construction of sequence is foundation pit reinforced
Net and water resistant plate bar frame facility work, and outlet pipe is fixed on steel mesh；
S5: one-piece casting foundation pit and water resistant plate, and carry out the maintenance of concrete.
7. the cushion cap foundation ditch construction method according to claim 7 for having continuous drainage function, it is characterised in that: step S5
The middle maintenance for completing concrete and after reaching corresponding design strength, carries out reversed slip casting to outlet pipe using cement mortar, makes
Gap and outlet pipe that cement mortar fills full fitros material are obtained, cement mortar and fitros material form permanent water-tight concrete, out
Waterpipe permanently stays in suspended deck structure.
8. the cushion cap foundation ditch construction method according to claim 7 for having continuous drainage function, it is characterised in that: in step
In S3, the outlet pipe is installed perpendicular to horizontal plane, and is provided with one or more vertical vertical bar to reinforce the steady of outlet pipe
Fixed degree.
9. the cushion cap foundation ditch construction method according to claim 7 for having continuous drainage function, it is characterised in that: in step
In S3, before installing internal layer filter screen, the crater wall for being first close to catch pit installs outer filter mesh enclosure, and fitros material is filled in internal layer
Between filter screen and outer filter net.
10. the cushion cap foundation ditch construction method according to claim 7 for having continuous drainage function, it is characterised in that: in step
It in rapid S3, is flushed at the top of the top of the fitros bed of material and catch pit, stone layer filling to be filtered finishes, and covers at the top of catch pit
One layer of isolation steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810966687.2A CN109083175A (en) | 2018-08-23 | 2018-08-23 | The cushion cap foundation pit and its construction method for having continuous drainage function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810966687.2A CN109083175A (en) | 2018-08-23 | 2018-08-23 | The cushion cap foundation pit and its construction method for having continuous drainage function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109083175A true CN109083175A (en) | 2018-12-25 |
Family
ID=64794301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810966687.2A Pending CN109083175A (en) | 2018-08-23 | 2018-08-23 | The cushion cap foundation pit and its construction method for having continuous drainage function |
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| Country | Link |
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| CN (1) | CN109083175A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718098A (en) * | 2022-04-08 | 2022-07-08 | 中铁建电气化局集团第三工程有限公司 | Drainage and water isolation structure and drainage and water isolation method in foundation pit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08135005A (en) * | 1994-11-15 | 1996-05-28 | Fujita Corp | Drain pit |
| CN104179189A (en) * | 2014-08-29 | 2014-12-03 | 上海建工七建集团有限公司 | Dewatering and drainage structure of foundation pit deep drop area and construction method thereof |
| 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 |
| CN104711994A (en) * | 2015-01-27 | 2015-06-17 | 江苏省华建建设股份有限公司 | Foundation pit deep well rainfall and plugging construction method |
| CN106223351A (en) * | 2016-07-26 | 2016-12-14 | 中国二十二冶集团有限公司 | Self priming pump reduces local groundwater level construction method |
| CN208844591U (en) * | 2018-08-23 | 2019-05-10 | 中国五冶集团有限公司 | It is a kind of can continuous drainage cushion cap foundation pit |
-
2018
- 2018-08-23 CN CN201810966687.2A patent/CN109083175A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08135005A (en) * | 1994-11-15 | 1996-05-28 | Fujita Corp | Drain pit |
| CN104179189A (en) * | 2014-08-29 | 2014-12-03 | 上海建工七建集团有限公司 | Dewatering and drainage structure of foundation pit deep drop area and construction method thereof |
| 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 |
| CN104711994A (en) * | 2015-01-27 | 2015-06-17 | 江苏省华建建设股份有限公司 | Foundation pit deep well rainfall and plugging construction method |
| CN106223351A (en) * | 2016-07-26 | 2016-12-14 | 中国二十二冶集团有限公司 | Self priming pump reduces local groundwater level construction method |
| CN208844591U (en) * | 2018-08-23 | 2019-05-10 | 中国五冶集团有限公司 | It is a kind of can continuous drainage cushion cap foundation pit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718098A (en) * | 2022-04-08 | 2022-07-08 | 中铁建电气化局集团第三工程有限公司 | Drainage and water isolation structure and drainage and water isolation method in foundation pit |
| CN114718098B (en) * | 2022-04-08 | 2024-04-19 | 中铁建电气化局集团第三工程有限公司 | Drainage and water-isolation structure in foundation pit and drainage and water-isolation method |
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Application publication date: 20181225 |