CN203891044U - Model device for researching out-pit precipitation in presence of good water-insulating layer on outer side of foundation pit - Google Patents
Model device for researching out-pit precipitation in presence of good water-insulating layer on outer side of foundation pit Download PDFInfo
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- CN203891044U CN203891044U CN201420200288.2U CN201420200288U CN203891044U CN 203891044 U CN203891044 U CN 203891044U CN 201420200288 U CN201420200288 U CN 201420200288U CN 203891044 U CN203891044 U CN 203891044U
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Abstract
The utility model discloses a model device for simulating out-pit precipitation in the presence of a good water-insulating layer on the outer side of a foundation pit. The device mainly comprises a sample loading groove, an out-pit precipitation device, a water-insulating layer simulation device and a data acquisition system. A layer of soft clay coated with geotechnical cloth is formed inside the out-pit precipitation device to simulate the good water-insulating layer existing on the periphery underwater level of a practical foundation pit; the distance between an upper side water-insulating plate and the edge of the sample loading groove under the condition that the precipitation effect is optimal can be found out by horizontally moving a water blocking plate on the upper side of the water-insulating layer; the influences of practical foundation pit engineering water pumping flow and the depth of a precipitation tube well on foundation pit precipitation can be simulated by changing the water pumping flow of an intelligent water pumping system and the inserting depth of an organic glass water pumping pipe. In conclusion, the device is suitable for foundation pit engineering precipitation test research, offers guidance for the design and construction of practical engineering, and can be applied to the teaching and scientific research experiments of geotechnical engineering and hydraulic engineering.
Description
Technical field
The utility model relates to model tests of hydraulic engineering field, is a kind of experimental rig of studying soil mass of foundation pit precipitation specifically.
Background technology
High level, super highrise building and deep foundation ditch increase gradually in recent years, and dewatering project is more and more, and building foundation pit cutting depth, below waterline, in order to make to keep dry and be convenient to the construction of ground and Foundation Design in foundation ditch, need to be carried out precipitation around foundation ditch.But the character complexity of the outer soil body of foundation ditch and groundwater table, it is wherein a kind of in substrate, having good water barrier.For effective precipitation, can insert space enclosing structure by the pervious layer blocking-up on water barrier in foundation ditch outer rim, in the soil body, form drawdown curve, in the object that reaches groundwater table in reduction foundation ditch by pumping system.But because WATER LEVEL CHANGES is very complicated, outer rim is gone along with sb. to guard him the position of insertion, size of pipe well pump-out etc. can significantly affect dewatering effect in foundation ditch, and does not also have at present a kind of experimental facilities can accurately, effectively simulate above-mentioned foundation pit dewatering situation.
For the problem of these existence, the utility model is taked corresponding improvement, the dewatering effect of foundation ditch inside while making this model equipment can simulate more really and test foundation ditch both sides to have good water barrier.
Utility model content
For addressing the above problem, the utility model provides a kind of model equipment of the outer precipitation in hole when studying foundation ditch both sides and having good water barrier.Realize above-mentioned utility model object, the utility model adopts following technical scheme:
A kind of model equipment of cheating outer precipitation when foundation ditch outside exists good water barrier of studying, comprise the outer water-level control apparatus for supplying water, for filling the dress sample slot device of sample, for extracting the intelligent water plug of ponding in foundation ditch, for the data acquisition unit of data acquisition and processing, wherein, described outer water-level control apparatus is communicated with dress sample slot device by feed pipe; Described dress sample slot device is communicated with water plug by lucite tube one; Described dress sample slot device is connected with data acquisition unit by data wire; Described dress sample slot device comprises two parts: sample groove one and sample groove two, and the two separates by organic glass space enclosing structure; In described sample groove one, the water barrier vertical with organic glass space enclosing structure is installed, the chute vertical with organic glass space enclosing structure is installed on water barrier top, chute is arranged on the inwall of two relative side, and the water-stop sheet vertical with chute is installed on chute, and water-stop sheet is seated on water barrier; On described water barrier, offer by the through hole of lucite tube two, water barrier wraps up soft clay by geotextiles one and forms, the sizes such as the bottom of water barrier and sample groove one.
Intelligent water plug described in the utility model is externally connected to machine glass tube one, the other end socket lucite tube two of lucite tube one, the protruding sample groove one of lucite tube two, the other end parcel geotextiles of lucite tube two.
On lucite tube one described in the utility model, electronic grout flow meter and valve are installed.
Outer water-level control apparatus described in the utility model comprises:
For the yoke of fixed pulley is installed, for the mechanical driving device being made up of pulley, hawser of Liftable and movable water tank, for the portable tank of retaining, for the base plate of placed mobile water tank, wherein, pulley is fixedly installed on yoke; Base plate by cable suspended between pulley; Hawser one end is connected with base plate, and the other end is free end.
Data acquisition unit described in the utility model comprises and is uniformly distributed in the liquid level sensor that dress sample groove inwall arranges along short transverse, and liquid level sensor is connected with terminal.
There is water inlet in portable tank described in the utility model left side, and there is overfall gap on right side, and the delivery port that feed pipe is installed is arranged at bottom.
Compared with prior art, the beneficial effects of the utility model are:
This device can be when placing bury that one deck wraps up by geotextiles in dewatering device simulate the good water barrier existing under groundwater table around actual foundation ditch outside hole the actual working state of foundation pit dewatering; Can move horizontally the position of water barrier upside watertight shutter, upside water-stop sheet and the distance that fills sample groove edge while finding out dewatering effect the best; Also can simulate actual base pit engineering draw water flow and the impact of downcomer well depth on foundation pit dewatering by changing the insertion depth of flow that intelligent pumping system draws water and organic glass drinking-water pipe.To sum up, this device, in providing directive function for the design of dyke building and base pit engineering, also can be served as the teaching of geotechnical engineering and hydraulic engineering subject and the use of scientific experiment equipment.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is water barrier apparatus structure schematic diagram.
Water level, soil sample schematic diagram when Fig. 3 is model equipment work.
In Fig. 1: 1, long yoke 2, fixed pulley 3, portable feed tank 4, water inlet 5, overfall gap 6, hawser 7, feed pipe 8, chute 9, water-stop sheet 10, water barrier device 11, cuboid organic glass water level case 12, liquid level sensor 13, heavy caliber lucite tube 14, geotextiles 15, organic glass space enclosing structure 16, semicircle cylindricality sample groove 17, small-bore lucite tube 18, electronic grout flow meter 19, valve 20, intelligence water pumper 21, terminal, 22, soft clay 23, geotextiles one.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand these embodiment is only not used in and limits the scope of the invention for the present invention is described, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the amendment of the various equivalent form of values of the present invention.
As Fig. 1 shows, the utility model discloses a kind of model test apparatus of the outer precipitation in hole when studying both sides and having good water barrier, this device mainly comprises the dewatering device for supplying water, for filling the dress sample slot device of sample, for extracting the water plug 20 of ponding in foundation ditch, for the data acquisition unit of data sampling and processing.
As shown in Figure 1, dewatering device described in the utility model is communicated with dress sample slot device by feed pipe 7; Described dress sample slot device is communicated with water plug 20 by lucite tube 1; Described dress sample slot device is connected with data acquisition unit by data wire.
Dress sample slot device described in the utility model comprises two parts: sample groove 1 and sample groove 2 16, the two is communicated with by organic glass space enclosing structure 15, in described sample groove 1, the water barrier vertical with organic glass space enclosing structure 15 10 is installed, on water barrier 10 tops, the chute 8 vertical with organic glass space enclosing structure 15 is installed, chute 8 is arranged on the inwall of two relative side.
As shown in Figure 2, water barrier 10 described in the utility model is made up of the soft clay 22 of geotextiles one 23 parcel, can real simulation foundation ditch both sides be existed by the soft clay bag of geotextiles parcel densification reality good water barrier time precipitation state, the sizes such as the bottom of water barrier 10 and sample groove 1.On water barrier 10 tops, the water-stop sheet 9 vertical with chute 8 is installed on chute 8, water-stop sheet 9 is seated on water barrier 10, has so simulated actual foundation ditch and exist the situation of peripheral structure, and water-stop sheet 9 can be simulated foundation ditch from peripheral structure.Water-stop sheet 9 can level certainly move in chute 8, so can simulate the spacing between the sample groove two of foundation ditch and the water-stop sheet 9 of simulation enclosed structure by change, change the situation of the outer retaining of peripheral structure simultaneously, simulate the impact for precipitation outside hole under different far and near distances of foundation ditch peripheral structure.
Described water plug (20) is externally connected to machine glass tube one (17), the other end socket lucite tube two (13) of lucite tube one (17), the protruding sample groove one (11) of lucite tube two (13), the other end parcel geotextiles (14) of lucite tube two (13).
The utility model also comprises an intelligent water plug, comprise: a set of lucite tube (there is hole end and is wrapped in the lucite tube 2 13 of geotextiles 14, lucite tube 1), the intelligent water pumper 20 being connected with electronic grout flow meter 18, valve 19 forms.The other end socket lucite tube 2 13 of lucite tube 1, the protruding sample groove 1 of lucite tube 2 13.Can simulate the form of pipe well in actual base pit engineering by the assembling of lucite tube; The electronic grout flow meter 18 real time record flow that draws water, in the time that flow is less than boundary value, intelligent water pumper 20 quits work and valve-off 19, waits for that large-caliber glass tubes 13 water levels rise.
Sample groove groove body described in the utility model position is reserved liquid level sensor installing hole equidistantly, for the liquid level sensor 12 being uniformly distributed on dress sample groove inwall is installed, liquid level sensor 12 can be monitored water level height under the soil body in real time, and is simulated and drawn in real time groundwater table distribution map by terminal 21.
Outer water-level control apparatus described in the utility model comprises:
For the yoke 1 of fixed pulley 2 is installed, for the mechanical driving device being made up of pulley 2, hawser 9 of Liftable and movable water tank 3, for the portable tank 3 of retaining, for the base plate 24 of placed mobile water tank 3, wherein, pulley 2 is fixedly installed on yoke 1; Base plate 24 hangs between pulley 2 by hawser 7; Hawser 7 one end are connected with base plate 6, and the other end is free end; Portable tank 3 is fixedly installed on base plate 24, and there is water inlet 4 in described portable tank 3 left sides, and there is overfall gap 5 on right side, and the delivery port that feed pipe 7 is installed is arranged at bottom.
Make the portable tank 3 stable mobile head difference that produces up and down by hawser 7, under the effect of head difference, observe water and in the soil sample of dress sample groove, form seepage field through interlayer.The head difference that can also change according to the regularity that presets a kind of similar flood peak of lifting time interval simulation, observes the seepage field forming in soil sample, is then discharged by water plug.
As shown in Figure 3, as a preferred embodiment of the present utility model, the model test apparatus of precipitation outside have good water barrier as research foundation ditch both sides time hole, its concrete implementation step is as follows:
A, in cuboid organic glass water level case 11 and semicircle cylindricality sample groove 16, layering packs soil sample into, and carries out compacting, exhaust and saturated processing, and inserts organic glass fender structure 15 in the left side of semicircle cylindricality sample groove 16.Stable head provides system in cuboid organic glass water level case 11, to provide stable head by feed pipe 7.
The invariant position of b, maintenance water-stop sheet 9, by moving up and down lucite tube group (13,17), can simulate the impact of pipe well insertion depth on foundation pit dewatering.
The invariant position of c, maintenance lucite tube group (13,17), it is certain value that intelligent water pumper 20 is controlled the interior water level of lucite tube 2 13.In chute 8, move horizontally water-stop sheet 9, the impact of the insertion position of simulating actual base pit engineering outer rim space enclosing structure on foundation pit dewatering.
Data acquisition unit can carry out the hydraulic pressure in measurement mechanism according to the one group of liquid level sensor 12 being distributed on cuboid organic glass water level case 11 and semicircle cylindricality sample groove 16, and terminal 21 can be drawn the water level distribution map in this covering device in real time according to these data.
Claims (6)
1. study the model equipment of cheating outer precipitation when foundation ditch outside exists good water barrier for one kind, it is characterized in that, comprise the outer water-level control apparatus for supplying water, for filling the dress sample slot device of sample, for extracting the intelligent water plug (20) of ponding in foundation ditch, for the data acquisition unit of data acquisition and processing, wherein, described outer water-level control apparatus is communicated with dress sample slot device by feed pipe (7); Described dress sample slot device is communicated with water plug (20) by lucite tube one (17); Described dress sample slot device is connected with data acquisition unit by data wire; Described dress sample slot device comprises two parts: sample groove one (11) and sample groove two (16), and the two separates by organic glass space enclosing structure (15); The water barrier (10) vertical with organic glass space enclosing structure (15) is installed in described sample groove one (11), the chute (8) vertical with organic glass space enclosing structure (15) is installed on water barrier (10) top, chute (8) is arranged on the inwall of two relative side, the upper installation of chute (8) water-stop sheet (9) vertical with chute (8), water-stop sheet (9) is seated on water barrier (10); On described water barrier (10), offer by the through hole of lucite tube two (13), water barrier (10) wraps up soft clay (22) by geotextiles one (23) and forms, the sizes such as the bottom of water barrier (10) and sample groove one (11).
2. a kind of model equipment of cheating outer precipitation when foundation ditch outside exists good water barrier of studying according to claim 1, it is characterized in that, described intelligent water plug (20) is externally connected to machine glass tube one (17), the other end socket lucite tube two (13) of lucite tube one (17), the protruding sample groove one (11) of lucite tube two (13), the other end parcel geotextiles (14) of lucite tube two (13).
3. a kind of model equipment of cheating outer precipitation when foundation ditch outside exists good water barrier of studying according to claim 2, is characterized in that upper electronic grout flow meter (18) and the valve (19) installed of described lucite tube one (17).
4. a kind of model equipment of cheating outer precipitation when foundation ditch outside exists good water barrier of studying according to claim 1, is characterized in that, described outer water-level control apparatus comprises:
Be used for installing the yoke (1) of fixed pulley (2), for the mechanical driving device being formed by pulley (2), hawser (9) of Liftable and movable water tank (3), for the portable tank (3) of retaining, for the base plate (24) of placed mobile water tank (3), wherein, pulley (2) is fixedly installed on yoke (1); Base plate (24) hangs between pulley (2) by hawser (7); Hawser (7) one end is connected with base plate (6), and the other end is free end.
5. a kind of model equipment of cheating outer precipitation when foundation ditch outside exists good water barrier of studying according to claim 1, it is characterized in that, described data acquisition unit comprises and is uniformly distributed in the liquid level sensor (12) that dress sample groove inwall arranges along short transverse, and liquid level sensor (12) is connected with terminal (21).
6. a kind of model equipment of cheating outer precipitation when foundation ditch outside exists good water barrier of studying according to claim 4, it is characterized in that, there is water inlet (4) in described portable tank (3) left side, and there is overfall gap (5) on right side, and the delivery port of installation feed pipe (7) is arranged at bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420200288.2U CN203891044U (en) | 2014-04-23 | 2014-04-23 | Model device for researching out-pit precipitation in presence of good water-insulating layer on outer side of foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420200288.2U CN203891044U (en) | 2014-04-23 | 2014-04-23 | Model device for researching out-pit precipitation in presence of good water-insulating layer on outer side of foundation pit |
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| CN203891044U true CN203891044U (en) | 2014-10-22 |
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| CN201420200288.2U Expired - Fee Related CN203891044U (en) | 2014-04-23 | 2014-04-23 | Model device for researching out-pit precipitation in presence of good water-insulating layer on outer side of foundation pit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386430A (en) * | 2015-10-16 | 2016-03-09 | 上海交通大学 | Method for confirming water head of two sides of waterproof curtain under waterproof curtain effect |
| CN107436280A (en) * | 2017-09-26 | 2017-12-05 | 中国科学院武汉岩土力学研究所 | Curtain withdrawal device and curtain withdrawal system |
| CN107643376A (en) * | 2017-08-25 | 2018-01-30 | 中国地质大学（武汉） | It is a kind of to simulate experimental provision of the high-arsenic underground water irrigation to underground water environmental impact |
| CN108118725A (en) * | 2017-12-04 | 2018-06-05 | 上海交通大学 | The experimental rig and method of base pit dewatering in equivalent material simulating artesian aquifer |
| CN110221042A (en) * | 2019-06-27 | 2019-09-10 | 合肥工业大学 | A kind of device of simulating excavation stress field and Analysis of Ground-water Seepage Field coupling effect |
| CN110308082A (en) * | 2018-03-27 | 2019-10-08 | 北京交通大学 | A kind of indoor pit well pumping test method |
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2014
- 2014-04-23 CN CN201420200288.2U patent/CN203891044U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386430A (en) * | 2015-10-16 | 2016-03-09 | 上海交通大学 | Method for confirming water head of two sides of waterproof curtain under waterproof curtain effect |
| CN107643376A (en) * | 2017-08-25 | 2018-01-30 | 中国地质大学（武汉） | It is a kind of to simulate experimental provision of the high-arsenic underground water irrigation to underground water environmental impact |
| CN107436280A (en) * | 2017-09-26 | 2017-12-05 | 中国科学院武汉岩土力学研究所 | Curtain withdrawal device and curtain withdrawal system |
| CN108118725A (en) * | 2017-12-04 | 2018-06-05 | 上海交通大学 | The experimental rig and method of base pit dewatering in equivalent material simulating artesian aquifer |
| CN108118725B (en) * | 2017-12-04 | 2019-06-07 | 上海交通大学 | The experimental rig and method of base pit dewatering in equivalent material simulating artesian aquifer |
| CN110308082A (en) * | 2018-03-27 | 2019-10-08 | 北京交通大学 | A kind of indoor pit well pumping test method |
| CN110308082B (en) * | 2018-03-27 | 2020-12-18 | 北京交通大学 | Indoor foundation pit precipitation test method |
| CN110221042A (en) * | 2019-06-27 | 2019-09-10 | 合肥工业大学 | A kind of device of simulating excavation stress field and Analysis of Ground-water Seepage Field coupling effect |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20170423 |
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| CF01 | Termination of patent right due to non-payment of annual fee |