CN206052749U - 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 PDF

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Publication number
CN206052749U
CN206052749U CN201620986289.3U CN201620986289U CN206052749U CN 206052749 U CN206052749 U CN 206052749U CN 201620986289 U CN201620986289 U CN 201620986289U CN 206052749 U CN206052749 U CN 206052749U
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China
Prior art keywords
water
stop
flange
splash guard
foundation pit
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Active
Application number
CN201620986289.3U
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Chinese (zh)
Inventor
李志军
刘国秀
赵宝锋
杨金庚
欧阳锦
张柯
何毅
彭再勇
刘敏
邵阳
未长青
王厚涛
蒋树峰
程斌
曹露平
安斌
李少贤
弋强
贺劲
张小莉
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China Railway Tunnel Group Erchu Co Ltd
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China Railway Tunnel Group Erchu Co Ltd
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Priority to CN201620986289.3U priority Critical patent/CN206052749U/en
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Abstract

A kind of deep collection water-stop in foundation pit construction for water-rich sand layer, its structure include:Water flange, splash guard, water stop rubber pad, sealing steel loop, drainage screen, casing.This utility model is simple and reasonable, convenient processing and manufacture, low cost, and water-pumping/draining effect is evident that advantage, and eliminates pressure of the subsoil water to concrete floor, is finally reached the purpose of release sealing.

Description

For the deep collection water-stop in water-rich sand layer foundation pit construction
Technical field
This utility model patent is related to the deep collection water-stop in a kind of foundation pit construction for water-rich sand layer.
Background technology
In recent years, as the underground engineerings such as subway, tunnel, large hydraulic engineering, Tall Building Foundation constantly develop, deep base Hole construction has been increasingly becoming a noticeable technological difficulties and hot issue in architectural engineering.How subsoil water is controlled, Which is reduced to deep pit digging and the negative effect of concrete construction, become deep basal pit hypogee construction in one it is important and More scabrous construction link.
In the higher regional deep pit excavation of level of ground water, as water-bearing layer is cut off, make in pressure reduction or underground crevice water With under, subsoil 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, to guarantee 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, four kinds of the bright row's method of sump.Suitable precipitation method is chosen, safety coefficient during construction can not only be greatly improved, and And construction costs is reduced, save substantial contribution.
Nanchang Hong Gu tunnels west bank engineering geology construction is mainly water-rich sand layer, and bottom is connected with Ganjiang River water level. The deep basal pit section of NK1+182 ~+217, tunnel excavation of foundation pit are more to pit water accumulation during designed elevation, and the daily displacement of foundation ditch reaches To 150m3.Its reason has three:One is due to construction period Nanchang weather a run of wet weather;Two is to close on Ganjiang River, after water level goes up, About 17.2 meters of the actual measurement Ganjiang River mean water elevations of Jing, substrate elevation is 7.1 meters, and subsoil water is gushed out by bottom of foundation ditch;Three It is lower sleeping rock stratum joints development, crevice water enriches, and above alters to foundation ditch bottom.The long 35m of this section of foundation ditch, wide 30m, deep 16.9m, circuit slope Spend for 4.7 ﹪, the gradient is big, and hydrops are more.According to design, dewatering well two in foundation ditch, is provided with, which mainly makees to be to excavate Water Level in Foundation Pit is reduced in journey, after being excavated to substrate, need to be to two mouthfuls of dewatering well closings.Two dewatering wells closing after, foundation ditch internal water accumulation without Method is discharged, and causes agent structure construct.Another this section of foundation ditch is completely last closure segment, if unreasonable solution ground water pressure, Casting concrete will cause base plate to float or shift by force, and heave, rising phenomenon once occurred in Nanchang City's Large Foundation Pit. Case.
Utility model content
The purpose of this utility model is not enough for prior art, provides the collection in a kind of foundation pit construction for water-rich sand layer Receive water-stop.
Collection water-stop structure described in the utility model includes:Water flange, splash guard, water stop rubber pad, sealing steel loop, mistake Filter screen, casing;
The waist ring for collecting water-stop welds one water flange, is close to ring fixed installation below water flange Complete splash guard, pads upper water stop rubber pad between water flange and splash guard, splash guard is below by bolt fixation clip and sealing Flange;Collect water-stop middle and upper part ring and weld one sealing steel loop, collect water-stop bottom and bore several permeable holes, permeable hole It is outside to be wrapped up using double-layer filtering net, prevent sandstone from entering in water collector(According to foundation ditch water yield and pumping equipment quantity, catchment The overall dimensions of device suitably can be adjusted);Base plate of foundation pit is excavated when completing, and digs catch pit two in the relatively low mileage of elevation, Foundation ditch bottom surface is changed and fills out gravel or cobble and be compacted, and as pervious bed, retention of excessive fluid in foundation ditch is all drained in catch pit, afterwards will The water collector made is fixed in catch pit,(The elevations such as the water flange and bed course top surface of waist);Install in water collector High pump head sewage pump, regularly draws water.
The beneficial effects of the utility model:This utility model is simple and reasonable, convenient processing and manufacture, low cost, pump drainage Water effect is evident that advantage, and eliminates pressure of the subsoil water to concrete floor, is finally reached the purpose of release sealing.
Description of the drawings
Fig. 1 is collection water-stop structural representation described in the utility model;
In figure:1. 2. upper flange of sealing cover plate, 3. sealing steel loop, 4. lower flange, 5. water stop rubber pad, 6. splash guard 7. stops 8. casing of hydraulic pressure plate, 9. bottom;
Fig. 2 is collection water-stop scheme of installation described in the utility model;
In figure:10. 11. structure base slab of water-stop is collected.
Specific embodiment
Below in conjunction with the accompanying drawings this utility model patent is further described.
Fig. 1 is the collection water-stop schematic diagram for having concrete size, and unit is mm;
Fig. 2 is the collection water-stop installation diagram for having concrete size, and unit is mm;
Collection water-stop structure described in the utility model includes:Water flange, splash guard, water stop rubber pad, sealing steel loop, mistake Filter screen, casing;
The waist ring for collecting water-stop welds one water flange, is close to ring fixed installation below water flange Complete splash guard, pads upper water stop rubber pad between water flange and splash guard, splash guard is below by bolt fixation clip and sealing Flange;Collect water-stop middle and upper part ring and weld one sealing steel loop, collect water-stop bottom and bore several permeable holes, permeable hole It is outside to be wrapped up using double-layer filtering net, prevent sandstone from entering in water collector(According to foundation ditch water yield and pumping equipment quantity, catchment The overall dimensions of device suitably can be adjusted);Base plate of foundation pit is excavated when completing, and digs catch pit two in the relatively low mileage of elevation, Foundation ditch bottom surface is changed and fills out gravel or cobble and be compacted, and as pervious bed, retention of excessive fluid in foundation ditch is all drained in catch pit, afterwards will The water collector made is fixed in catch pit,(The elevations such as the water flange and bed course top surface of waist);Install in water collector High pump head sewage pump, regularly draws water.
Collection sealing implement body described in the utility model is installed and is produced as follows:
Embodiment is made using Q235 steel.
First, this section of deep basal pit section building enclosure construction, surrounding adopt construction of diaphragm wall technique.
2nd, dewatering well 2 in construction foundation pit.
3rd, precipitation in foundation ditch is carried out, stage excavation and supporting are to substrate.
When the 4th, being excavated to bottom base plate, catch pit at 2 is dug out in base plate low side, change in substrate and fill out gravel or boulder bed.
5th, catch pit backfill gravel or cobble, are connected with substrate pervious bed.
6th, install and collect water-stop and pumping equipment.
7th, base plate 15cm thickness C20 plain concrete cushion layers are poured, waterproof roll, waterproof roll and collection water-stop is re-layed Fixed waterproof roll is connected.
8th, casting concrete protective layer, assembling reinforcement close template, pour underplate concrete.
9th, after agent structure and top board backfilling of earthwork are finished, block the reserved collection water-stop of base plate.

Claims (1)

1. the depth in a kind of foundation pit construction for water-rich sand layer collects water-stop, it is characterised in that:Its structure includes:Water-stop method Orchid, splash guard, water stop rubber pad, sealing steel loop, drainage screen, casing;
The waist ring for collecting water-stop welds one water flange, is close to ring fixed installation below water flange complete Splash guard, pads upper water stop rubber 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 ring and weld one sealing steel loop, collect water-stop bottom and bore several permeable holes, outside permeable hole Wrapped up using double-layer filtering net.
CN201620986289.3U 2016-08-31 2016-08-31 For the deep collection water-stop in water-rich sand layer foundation pit construction Active CN206052749U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620986289.3U CN206052749U (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
CN201620986289.3U CN206052749U (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
CN206052749U true CN206052749U (en) 2017-03-29

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Application Number Title Priority Date Filing Date
CN201620986289.3U Active CN206052749U (en) 2016-08-31 2016-08-31 For the deep collection water-stop in water-rich sand layer foundation pit construction

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106149741A (en) * 2016-08-31 2016-11-23 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106149741A (en) * 2016-08-31 2016-11-23 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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