CN103821158B - Construction excavation drainage method under high groundwater condition - Google Patents
Construction excavation drainage method under high groundwater condition Download PDFInfo
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- CN103821158B CN103821158B CN201410109533.3A CN201410109533A CN103821158B CN 103821158 B CN103821158 B CN 103821158B CN 201410109533 A CN201410109533 A CN 201410109533A CN 103821158 B CN103821158 B CN 103821158B
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- 238000010276 construction Methods 0.000 title claims abstract description 25
- 238000009412 basement excavation Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003673 groundwater Substances 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 69
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000004062 sedimentation Methods 0.000 claims description 12
- 238000004078 waterproofing Methods 0.000 claims description 9
- 239000004567 concrete Substances 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 4
- 239000011083 cement mortar Substances 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 229920011532 unplasticized polyvinyl chloride Polymers 0.000 claims description 4
- 238000000502 dialysis Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 241000628997 Flos Species 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to the field of drainage and drainage of engineering construction, and discloses a drainage and drainage method for construction excavation under a high groundwater condition. Which comprises the following steps: dividing the foundation pit into at least two working surfaces, wherein the working surfaces are isolated from each other; measuring the position of a well point around a working face, then excavating the well point, and putting a steel bar protection cage and a well pipe; water pumps are respectively arranged on each well point and between each working surface, and matched generator sets and pipelines are arranged at the same time; carrying out preferential drainage on one or more working surfaces, and pumping water in the working surfaces with preferential drainage to the working surfaces with subsequent drainage; and pumping water from each well point to a water outlet for discharge. The method is used for treating water burst and dialysis under the condition of high groundwater of a deep foundation pit, and is beneficial to trench excavation, pad layer tamping, pipeline backfilling and engineering quality improvement; the method is simple and easy to implement, high in construction speed, capable of avoiding repeated reduction of drainage times, low in manpower, material and mechanical consumption and remarkable in economic benefit.
Description
Technical field
The present invention relates to the Yield rainfall relation field of engineering construction, the construction and excavation Yield rainfall relation method under especially a kind of high groundwater condition.
Background technology
For in project construction, because of its deep foundation ditch, i.e. the foundation ditch of cutting depth >=5m, in phreatic high situation, groundwater table distance natural terrain is comparatively near, in channel excavation process, easily occur large area water pouring or dialysis, causes excavation difficulty, measures difficulty; When channel excavation is to design plane, pipeline foundation cannot be tamped because of its underground water, be difficult to smooth sandstone, ensure its degree of compaction; Because underground water in pipe installation process, easily cause float tube, because of its pipeline valve, pipe fitting is out of shape, and affects its construction quality.
Domestic common way takes the mode of Yield rainfall relation completely, arranges water pump and pipeline along the line at pipe trench, and under such theory, the quantity of required pump, number of tubes is huge, completely the manpower of siphunculus, and machinery consumes large.Nor effectively can solve the Yield rainfall relation problem in work progress in timesaving.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of construction and excavation Yield rainfall relation method under high groundwater condition, and its duration is short and cost is low.
Construction and excavation Yield rainfall relation method under high groundwater condition disclosed by the invention, comprises the following steps:
A, will treat that Yield rainfall relation foundation ditch is divided at least two work planes, mutually isolated between each work plane;
B, around work plane, measure position, well point, measure after terminating, excavate well point according to projected depth, then descend reinforcing bar to protect cage and well casing;
C, on each well point and between each work plane, arrange water pump respectively, arrange supporting generating set and pipeline simultaneously;
D, preferential Yield rainfall relation is carried out to one or more work plane, the water in the work plane of preferential Yield rainfall relation is evacuated in the work plane of rear Yield rainfall relation;
E, draw water from each well point to outfall and discharge.
Preferably, before step e, first the water of each well point is evacuated in default grit chamber and carries out preliminary sedimentation, then the water after preliminary sedimentation is delivered to outfall discharge.
Preferably, described work plane is more than three or three, and the water in each work plane is evacuated to next work plane successively.
Preferably, undisturbed soil is reserved between described each work plane as the spacer between each work plane.
Preferably, described water pump is slush pump.
Preferably, described grit chamber adopts C20 element concrete or steel bar concrete base plate, and the brick pool wall of M7.5 cement mortar, inside and outside pool wall, two-layer waterproofing mortar is plastered, and adopts waterproofing work inside grit chamber.
Preferably, described pipeline is UPVC pipeline.
Preferably, the water in grit chamber drains into outfall by high pressure pumping station after preliminary sedimentation.
The invention has the beneficial effects as follows: the method processes for water burst and dialysis under the lower regimen shape in deep foundation ditch highland, and effective, contribute to channel excavation, bed course is tamped, pipeline backfill, raising workmanship; It is simple, and speed of application is fast, avoids repetition Yield rainfall relation number of times, and manpower, material and machinery consume less, contributes to reducing engineering cost, remarkable in economical benefits.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a preferred embodiment of the invention.
Mark in figure: 1-#1 work plane, 101-undisturbed soil, 2-#2 work plane, 3-grit chamber, A-slush pump A, B-slurry pump B, C-slush pump C, D-slush pump D, E-slush pump E, F-slush pump F, G-slush pump G, H-slush pump H.
In figure, arrow represents drainage direction, eliminates pipeline and generating set in figure.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
Construction and excavation Yield rainfall relation method under high groundwater condition disclosed by the invention, comprises the following steps:
A, will treat that Yield rainfall relation foundation ditch is divided at least two work planes, mutually isolated between each work plane;
B, around work plane, measure position, well point, measure after terminating, excavate well point according to projected depth, then descend reinforcing bar to protect cage and well casing;
C, on each well point and between each work plane, arrange water pump respectively, arrange supporting generating set and pipeline simultaneously;
D, preferential Yield rainfall relation is carried out to one or more work plane, the water in the work plane of preferential Yield rainfall relation is evacuated in the work plane of rear Yield rainfall relation;
E, draw water from each well point to outfall and discharge.
So, Yield rainfall relation construction is namely completed.
According to factors such as the distribution situations treating the shape of Yield rainfall relation foundation ditch, size and issue, be divided into multiple part, the foundation ditch part that these are separated out is work plane, will treat that each work plane of Yield rainfall relation is mutually isolated, thus water can be evacuated to another work plane from a work plane.B step is the step of arranging well point, need arrange position, well point according to actual conditions; Excavation depth as well point need be determined according to situations such as the groundwater table of reality, foundation depths.When excavating well point, digging machine or rig excavation to be selected according to actual geological conditions; Reinforcing bar protects the stability that cage can improve well point effectively; After well-point arrangement completes, then the accuracy of tested in well point correction thus raising construction.Water in the work plane of preferential Yield rainfall relation is drawn into the work plane of rear Yield rainfall relation, so can reduce duct length and pump power, wherein preferably between adjacent work plane, arrange that water pump draws water, meanwhile, drawn water in the well point be arranged at around work plane, to reach reducing and bailing effect.After the work of preferential Yield rainfall relation work plane Yield rainfall relation completes, need a period of time be observed, guarantee that Yield rainfall relation reaches requirement, can construct to it.When constructing to work plane, draw water in the well point that need continue around to work plane, to ensure in this work plane work progress, can keep always dry.In addition, the layout of water pump, generating set and outfall all will be determined according to actual conditions, and particularly the position of outfall needs the approval in advance by Ministry of Communications and Chinese Ministry of Environmental Protection.This scheme, compared to traditional Yield rainfall relation method, can effectively reduce pipeline, water pump and generator quantity, cost-saving, avoids repeatedly Yield rainfall relation thus the reduction of erection time simultaneously.
If the underground water extracted out is delivered directly to floss hole discharge possibility contaminated environment, so, as preferred embodiment, before step e, first the water of each well point is evacuated in default grit chamber and carries out preliminary sedimentation, then the water after preliminary sedimentation is delivered to outfall discharge.Water is discharged after sedimentation in grit chamber again, quantity of sand and mud in water can be reduced on the one hand, avoid the pollution for environment; On the other hand, if outfall position is comparatively far away, water after precipitation is more conducive to remote conveying.
This Yield rainfall relation method can be implemented according to actual subregion of taking, scene there being the foundation ditch of multiple water burst source point, and the mode that also series, parallel or series and parallel can be adopted to combine is implemented.So-called series connection refers to and the water of each work plane is drawn into next work plane successively; Namely so-called parallel connection refers to that the water water of multiple work plane being evacuated to same work plane or a work plane is evacuated to multiple work plane.So-called point of section enforcement is carries out Yield rainfall relation by multiple adjacent work plane by the serial or parallel connection composition Yield rainfall relation section that combines.And as preferred embodiment, described work plane is more than three or three, the water in each work plane is evacuated to next work plane successively.This is each work plane to be in series and carries out Yield rainfall relation.Such as, be provided with three work planes, be respectively #1 work plane, #2 work plane and #3 work plane, first hew out #1 work plane and #2 work plane, the water in #1 work plane is evacuated to #2 work plane, surge well point dewatering, to the Yield rainfall relation of #1 work plane; Then can open up #3 work plane, be generally after #3 work plane is opened up, and starts to construct to #1 work plane, can observe before this to #1 work plane, inspection reducing and bailing effect.After #3 work plane is opened up, the water of #2 work plane can be evacuated to #3 work plane, so series connection is drawn water, simple and in good order, can improve speed of application.
Need isolation between each work plane, so that the water in a work plane is evacuated to another work plane, and as preferred embodiment, between described each work plane, reserved undisturbed soil is as the spacer between each work plane.Reserved undisturbed soil between each work plane, can play a part to isolate work plane, on the other hand for water pump provides the workbench saving pipeline on the one hand.Compared to manually arranging spacer in order to isolate each work plane, it is more simple and practical, and construction cost is lower.
Water pump used herein can be stainless steel water pump, slush pump etc., and as preferred embodiment, described water pump is slush pump.Slush pump is more suitable for the extraction of this water containing a large amount of silt.
If the water extracted in foundation ditch directly discharge possibility contaminated environment, so need to be discharged again by the preliminary sedimentation of grit chamber, and for the setting of grit chamber, as preferred embodiment, described grit chamber adopts C20 element concrete or steel bar concrete base plate, the brick pool wall of M7.5 cement mortar, inside and outside pool wall, two-layer waterproofing mortar is plastered, and adopts waterproofing work inside grit chamber.Because grit chamber is generally positioned near foundation ditch, affect the construction safety of pattern foundation pit supporting structure body for anti-sealing permeates the ground again, so waterproofing work need be carried out to grit chamber.
The pipeline of conveying water has multiple choices, as steel pipe, and pvc pipe etc., and as preferred embodiment, described pipeline adopts UPVC pipe to lay.UPVC pipe has the advantages such as corrosion resistance is strong, fluid resistance is little, mechanical strength is high, quality is light, installation is convenient, watertightness is good, is specially adapted to the conveying of drainage of foundation pit.
Outfall may be arranged at comparatively distant positions as mentioned before, and in the case, as preferred embodiment, the water in grit chamber drains into outfall by high pressure pumping station after preliminary sedimentation.High pressure pumping station is applicable to the long distance delivery of water, water can be delivered to default outfall discharge.
Be one embodiment of the present of invention below:
As shown in Figure 1, the implementation step of this embodiment is as follows:
1, have chosen two work planes, be respectively #1 work plane 1 and #2 work plane 2, mid portion is undisturbed soil 101, wouldn't excavate, give over to pump working face, groundwater level is high, and flow is large, the water of #1 work plane 1 is evacuated to #2 work plane 2, can pipeline be effectively reduced like this, water pump and generator quantity, cost-saving, sequence of construction is as the same, by that analogy;
2., according to deployment, measure position, well point and note down.After measurement terminates, digging machine is in place, and excavate well point according to projected depth, after pore-forming, constructor answers in-site measurement depth of pore forming, after depth of pore forming reaches projected depth, stops creeping into.Otherwise must continue to creep into, to ensure depth of pore forming acceptance(check), then descend reinforcing bar to protect cage and well casing, measurement update is also noted down.
3, according to water yield, water pump disposal ability and real time node arrangement, reasonable Arrangement slush pump and generating set.Here arranged slush pump is respectively slush pump A, slurry pump B, slush pump C, slush pump D, slush pump E, slush pump F, slush pump G and slush pump H, totally 8 slush pumps.
4, by slush pump A and slurry pump B, the water of #1 work plane is evacuated to #2 work plane; By slush pump D, slush pump E, slush pump F, slush pump G and slush pump H, each well point water is evacuated to grit chamber 3, nearest outfall discharge is evacuated to through pumping plant after Preliminary sewage precipitation, according to the requirement of Chinese Ministry of Environmental Protection before discharge, carry out data to arrange, invite Chinese Ministry of Environmental Protection auditor site inspection, avoid because exhaust emission environment.
Wherein, slush pump G, slush pump H slush pump pipeline will extend to pipeline opposite bank, therefore arrange steel trestle in place, so that pipeline is transitioned into opposite bank from overhead.Dewatering well gutter adopts pipeline inner water drainage system, and 1 ~ 2 grit chamber 3 is built on drainage direction, grit chamber 3 position is determined according to actual measurement geographical environment, in advance by the approval of Ministry of Communications and Chinese Ministry of Environmental Protection, grit chamber 3 adopts C20 element concrete, thickness of slab 150 ~ 200mm, when sand trap position is less than 3.0 meters apart from hole back gauge, base plate needs arrangement of reinforcement, adopt arrangement of reinforcement φ 8200 × 200 steel mesh reinforcement, the brick pool wall of M7.5 cement mortar, inside and outside pool wall, two-layer waterproofing mortar is plastered one time, adopts waterproofing work inside pond.Grit chamber 3 and the strict antiseepage leakproof of drainage pipe are to ensure the safety of foundation pit supporting construction.Draw water and adopt every well every pump side-by-side tubes precipitation, ground comb focuses on grit chamber 3, and the water of extraction after grit chamber sedimentation and filtration, then is concentrated and entered default outfall.In addition, generator also wants supporting putting in place, needs to be equipped with 1-2 platform stand-by generator, so that start in time when breaking down.
Claims (7)
1. the construction and excavation Yield rainfall relation method under high groundwater condition, is characterized in that, comprise the following steps:
A, will treat that Yield rainfall relation foundation ditch is divided at least two work planes, mutually isolated between each work plane; Between described each work plane, reserved undisturbed soil is as the spacer between each work plane;
B, around work plane, measure position, well point, measure after terminating, excavate well point according to projected depth, then descend reinforcing bar to protect cage and well casing;
C, on each well point and between each work plane, arrange water pump respectively, arrange supporting generating set and pipeline simultaneously;
D, preferential Yield rainfall relation is carried out to one or more work plane, the water in the work plane of preferential Yield rainfall relation is evacuated in the work plane of rear Yield rainfall relation;
E, draw water from each well point to outfall and discharge.
2. the construction and excavation Yield rainfall relation method under high groundwater condition as claimed in claim 1, it is characterized in that: before step e, first the water of each well point is evacuated in default grit chamber and carries out preliminary sedimentation, then the water after preliminary sedimentation is delivered to outfall discharge.
3. the construction and excavation Yield rainfall relation method under high groundwater condition as claimed in claim 1 or 2, is characterized in that: described work plane is more than three or three, and the water in each work plane is evacuated to next work plane successively.
4. the construction and excavation Yield rainfall relation method under high groundwater condition as claimed in claim 1 or 2, is characterized in that: described water pump is slush pump.
5. the construction and excavation Yield rainfall relation method under high groundwater condition as claimed in claim 2, it is characterized in that: described grit chamber adopts C20 element concrete or steel bar concrete base plate, the brick pool wall of M7.5 cement mortar, inside and outside pool wall, two-layer waterproofing mortar is plastered, and adopts waterproofing work inside grit chamber.
6. the construction and excavation Yield rainfall relation method under high groundwater condition as claimed in claim 1, is characterized in that: described pipeline is UPVC pipeline.
7. the construction and excavation Yield rainfall relation method under high groundwater condition as claimed in claim 6, is characterized in that: the water in grit chamber drains into outfall by high pressure pumping station after preliminary sedimentation.
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| CN201410109533.3A CN103821158B (en) | 2014-03-21 | 2014-03-21 | Construction excavation drainage method under high groundwater condition |
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| CN201410109533.3A CN103821158B (en) | 2014-03-21 | 2014-03-21 | Construction excavation drainage method under high groundwater condition |
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| CN103821158A CN103821158A (en) | 2014-05-28 |
| CN103821158B true CN103821158B (en) | 2016-04-13 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009197411A (en) * | 2008-02-19 | 2009-09-03 | East Japan Railway Co | Construction method for lowering underground water level |
| CN101581090A (en) * | 2009-06-12 | 2009-11-18 | 中国科学院水利部成都山地灾害与环境研究所 | Water-fluctuation zone lowland water and soil conservation rapid water discharge method |
| CN101775810A (en) * | 2010-02-04 | 2010-07-14 | 天津大学 | Underground water control construction method in foundation pit dewatering project |
| CN102418347A (en) * | 2011-09-27 | 2012-04-18 | 天津住宅集团建设工程总承包有限公司 | Drainage construction method for blind drain and sump wells in deep foundation pit |
| CN102535626A (en) * | 2012-01-13 | 2012-07-04 | 邹杰 | Municipal drainage system |
| CN202809630U (en) * | 2012-09-11 | 2013-03-20 | 孔蕾蕾 | Drainage structure of deep foundation pit |
| CN203174616U (en) * | 2013-04-02 | 2013-09-04 | 中建城市建设发展有限公司 | Clay foundation rain falling and water saving system |
-
2014
- 2014-03-21 CN CN201410109533.3A patent/CN103821158B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009197411A (en) * | 2008-02-19 | 2009-09-03 | East Japan Railway Co | Construction method for lowering underground water level |
| CN101581090A (en) * | 2009-06-12 | 2009-11-18 | 中国科学院水利部成都山地灾害与环境研究所 | Water-fluctuation zone lowland water and soil conservation rapid water discharge method |
| CN101775810A (en) * | 2010-02-04 | 2010-07-14 | 天津大学 | Underground water control construction method in foundation pit dewatering project |
| CN102418347A (en) * | 2011-09-27 | 2012-04-18 | 天津住宅集团建设工程总承包有限公司 | Drainage construction method for blind drain and sump wells in deep foundation pit |
| CN102535626A (en) * | 2012-01-13 | 2012-07-04 | 邹杰 | Municipal drainage system |
| CN202809630U (en) * | 2012-09-11 | 2013-03-20 | 孔蕾蕾 | Drainage structure of deep foundation pit |
| CN203174616U (en) * | 2013-04-02 | 2013-09-04 | 中建城市建设发展有限公司 | Clay foundation rain falling and water saving system |
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| CN103821158A (en) | 2014-05-28 |
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