CN106149741A - For the deep collection water-stop in water-rich sand layer foundation pit construction - Google Patents
For the deep collection water-stop in water-rich sand layer foundation pit construction Download PDFInfo
- Publication number
- CN106149741A CN106149741A CN201610767328.5A CN201610767328A CN106149741A CN 106149741 A CN106149741 A CN 106149741A CN 201610767328 A CN201610767328 A CN 201610767328A CN 106149741 A CN106149741 A CN 106149741A
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- China
- Prior art keywords
- water
- stop
- flange
- splash guard
- foundation ditch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- E02D19/10—Restraining of underground water by lowering level of ground water
Abstract
A kind of for the deep collection water-stop in water-rich sand layer foundation pit construction, its structure includes: water flange, splash guard, water stop rubber pad, sealing steel loop, screen pack, casing.Present configuration advantages of simple, convenient processing and manufacture, low cost, water-pumping/draining effect is evident that advantage, and eliminates the pressure to concrete floor for the underground water, is finally reached the purpose of release sealing.
Description
Technical field
Patent of the present invention relates to a kind of for the deep collection water-stop in water-rich sand layer foundation pit construction.
Background technology
In recent years, with the underground engineering developments such as subway, tunnel, large hydraulic engineering, Tall Building Foundation, deep base
Hole construction has been increasingly becoming noticeable technological difficulties and hot issue in architectural engineering.How to control underground water well,
Reduce its negative effect to deep pit digging and concrete construction, become deep basal pit hypogee construction in one important and
More scabrous construction link.
In the higher regional deep pit excavation of level of ground water, owing to water-bearing layer is cut off, make at pressure reduction or underground crevice water
Under with, underground water constantly will necessarily enter foundation ditch by seepage flow, if do not carried out foundation ditch Yield rainfall relation work, it will cause foundation ditch to soak, make
Construction condition is deteriorated, and foundation bearing capacity declines, and is also possible to cause quicksand, piping and slope instability under flowing pressure effect
Etc. phenomenon, therefore, for guaranteeing security of foundation ditch construction, it is necessary to take effective precipitation and drainage measure.
At present, the Yield rainfall relation method of deep basal pit has many kinds, and generally speaking intercept water method, well-point dewatering method, curtain-draining
Method, sump bright row method four kinds.Choose suitable precipitation method, safety coefficient during construction can not only be greatly improved, and
And reduce construction costs, save substantial contribution.
West bank, Hong Gu tunnel, Nanchang engineering geology construction is mainly water-rich sand layer, and bottom is connected with Ganjiang River water level.?
NK1+182 ~+217 deep basal pit section, during tunnel excavation of foundation pit to designed elevation, pit water accumulation is more, and the displacement of foundation ditch every day reaches
To 150m3.It is due to construction period Nanchang weather a run of wet weather that its reason has three: one；Two is to close on Ganjiang River, after water level goes up,
Being about 17.2 meters through reality measurement Ganjiang River mean water elevation, substrate elevation is 7.1 meters, and underground water is gushed out by bottom foundation ditch；Three
Being lower sleeping rock stratum joints development, crevice water enriches, and above alters at the bottom of foundation ditch.The long 35m of this section of foundation ditch, wide 30m, deep 16.9m, circuit slope
Degree is 4.7, and the gradient is big, and ponding is more.According to design, being provided with dewatering well two in foundation ditch, it mainly makees to be to excavate
Journey reduces Water Level in Foundation Pit, after being excavated to substrate, two mouthfuls of dewatering wells need to be closed.Two dewatering wells close after, foundation ditch internal water accumulation without
Method is discharged, and causes agent structure to construct.Another this section of foundation ditch is last closure segment completely, if unreasonable solution ground water pressure,
Casting concrete will result in base plate floating or displacement by force, and heave, rising phenomenon once occurred in Nanchang City's Large Foundation Pit.
Case.
Content of the invention
It is an object of the invention to for prior art not enough, provide and a kind of stop for the collection in water-rich sand layer foundation pit construction
Hydrophone.
Collection water-stop structure of the present invention includes: water flange, splash guard, water stop rubber pad, sealing steel loop, filtration
Net, casing；
Waist hoop one water flange of welding of described collection water-stop, is close to hoop fixed installation below water flange complete
Splash guard, the upper water stop rubber pad of pad between water flange and splash guard, splash guard is below by bolt fixation clip and water flange；
Collect water-stop middle and upper part hoop one sealing steel loop of welding, collect water-stop bottom and bore several permeable holes, outside permeable hole
Use double-layer filtering net parcel, in preventing sandstone entrance water collector (according to foundation ditch water yield and pumping equipment quantity, water collector
Appearance and size can suitably adjust)；When base plate of foundation pit excavation completes, dig catch pit two at the relatively low mileage of elevation, at foundation ditch
Bottom surface is changed and is filled out gravel or cobble and be compacted, and as pervious bed, all drains into water burst in foundation ditch in catch pit, will make afterwards
Good water collector is fixed in catch pit, (elevation such as the water flange of waist and bed course end face)；Install in water collector and soar
Journey sewage pump, timing is drawn water.
Beneficial effects of the present invention: present configuration advantages of simple, convenient processing and manufacture, low cost, water-pumping/draining effect is bright
Show visible advantage, and eliminate the pressure to concrete floor for the underground water, be finally reached the purpose of release sealing.
Brief description
Fig. 1 is collection water-stop structural representation of the present invention；
In figure: 1. sealing cover plate 2. upper flange 3. sealing steel loop 4. lower flange 5. water stop rubber pad 6. splash guard 7. sealing pressure
Plate 8. casing 9. bottom；
Fig. 2 is collection water-stop scheme of installation of the present invention；
In figure: 10. collect water-stop 11. structure base slab.
Detailed description of the invention
Below in conjunction with the accompanying drawings patent of the present invention is further described.
Fig. 1 is the collection water-stop schematic diagram having concrete size, and unit is mm；
Fig. 2 is the collection water-stop installation diagram having concrete size, and unit is mm；
Collection water-stop structure of the present invention includes: water flange, splash guard, water stop rubber pad, sealing steel loop, screen pack, case
Body；
Waist hoop one water flange of welding of described collection water-stop, is close to hoop fixed installation below water flange complete
Splash guard, the upper water stop rubber pad of pad between water flange and splash guard, splash guard is below by bolt fixation clip and water flange；
Collect water-stop middle and upper part hoop one sealing steel loop of welding, collect water-stop bottom and bore several permeable holes, outside permeable hole
Use double-layer filtering net parcel, in preventing sandstone entrance water collector (according to foundation ditch water yield and pumping equipment quantity, water collector
Appearance and size can suitably adjust)；When base plate of foundation pit excavation completes, dig catch pit two at the relatively low mileage of elevation, at foundation ditch
Bottom surface is changed and is filled out gravel or cobble and be compacted, and as pervious bed, all drains into water burst in foundation ditch in catch pit, will make afterwards
Good water collector is fixed in catch pit, (elevation such as the water flange of waist and bed course end face)；Install in water collector and soar
Journey sewage pump, timing is drawn water.
Collection water-stop of the present invention is specifically installed and is produced as follows:
Embodiment all uses Q235 steel to make.
First, this section of deep basal pit section building enclosure construction, surrounding all uses construction of diaphragm wall technique.
2nd, dewatering well 2 in construction foundation pit.
3rd, carrying out precipitation in foundation ditch, stage excavation and supporting are to substrate.
When the 4th, being excavated to bottom base plate, dig out catch pit at 2s at base plate low side, change in substrate and fill out gravel or boulder bed.
5th, catch pit backfill gravel or cobble, be connected with substrate pervious bed.
6th, collection water-stop and pumping equipment are installed.
7th, pour the thick C20 plain concrete cushion layer of base plate 15cm, re-lay waterproof roll, waterproof roll and collection water-stop
The waterproof roll fixed is connected.
8th, casting concrete protective layer, assembling reinforcement, close template, pour underplate concrete.
9th, after agent structure and top board backfilling of earthwork finish, the reserved collection water-stop of closure base plate.
Claims (1)
1. the deep collection water-stop being used in water-rich sand layer foundation pit construction, it is characterised in that: its structure includes: water-stop method
Orchid, splash guard, water stop rubber pad, sealing steel loop, screen pack, casing；
Waist hoop one water flange of welding of described collection water-stop, is close to hoop fixed installation below water flange complete
Splash guard, the upper water stop rubber pad of pad between water flange and splash guard, splash guard is below by bolt fixation clip and water flange；
Collect water-stop middle and upper part hoop one sealing steel loop of welding, collect water-stop bottom and bore several permeable holes, outside permeable hole
Use double-layer filtering net parcel, prevent sandstone from entering in water collector, according to foundation ditch water yield and pumping equipment quantity, water collector
Appearance and size can suitably adjust；
When base plate of foundation pit excavation completes, dig catch pit two at the relatively low mileage of elevation, change in foundation ditch bottom surface and fill out gravel or cobble
And be compacted, as pervious bed, all drain into water burst in foundation ditch in catch pit, afterwards the water collector made is fixed on collection
In puddle, the elevation such as the water flange of waist and bed course end face；Installing high pump head sewage pump in water collector, timing is drawn water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610767328.5A CN106149741A (en) | 2016-08-31 | 2016-08-31 | For the deep collection water-stop in water-rich sand layer foundation pit construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610767328.5A CN106149741A (en) | 2016-08-31 | 2016-08-31 | For the deep collection water-stop in water-rich sand layer foundation pit construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106149741A true CN106149741A (en) | 2016-11-23 |
Family
ID=57344950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610767328.5A Pending CN106149741A (en) | 2016-08-31 | 2016-08-31 | For the deep collection water-stop in water-rich sand layer foundation pit construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106149741A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58185828A (en) * | 1982-04-23 | 1983-10-29 | Hitachi Ltd | Structure of sump pit bottom |
| CN201212148Y (en) * | 2008-07-07 | 2009-03-25 | 中建八局第二建设有限公司 | Precipitation Well seal structure in foundation slab |
| CN202280065U (en) * | 2011-09-22 | 2012-06-20 | 河北省第四建筑工程公司 | Local dewatering and drainage construction tool for deep foundation pit |
| CN206052749U (en) * | 2016-08-31 | 2017-03-29 | 中铁隧道集团二处有限公司 | For the deep collection water-stop in water-rich sand layer foundation pit construction |
-
2016
- 2016-08-31 CN CN201610767328.5A patent/CN106149741A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58185828A (en) * | 1982-04-23 | 1983-10-29 | Hitachi Ltd | Structure of sump pit bottom |
| CN201212148Y (en) * | 2008-07-07 | 2009-03-25 | 中建八局第二建设有限公司 | Precipitation Well seal structure in foundation slab |
| CN202280065U (en) * | 2011-09-22 | 2012-06-20 | 河北省第四建筑工程公司 | Local dewatering and drainage construction tool for deep foundation pit |
| CN206052749U (en) * | 2016-08-31 | 2017-03-29 | 中铁隧道集团二处有限公司 | For the deep collection water-stop in water-rich sand layer foundation pit construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161123 |
|
| WD01 | Invention patent application deemed withdrawn after publication |