CN103487563B - Testing apparatus used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism - Google Patents
Testing apparatus used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism Download PDFInfo
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- CN103487563B CN103487563B CN201310292321.9A CN201310292321A CN103487563B CN 103487563 B CN103487563 B CN 103487563B CN 201310292321 A CN201310292321 A CN 201310292321A CN 103487563 B CN103487563 B CN 103487563B
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Abstract
The invention provides a testing apparatus used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism. The testing apparatus is used for solving a problem of lack of experiment equipment, which is used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism, and systematic researches on relating data and mechanism at present. The testing apparatus comprises a model casing, geotextile, permeable steel plates, underground diaphragm walls, a pumping well, a recharge well, measuring devices and data collecting devices. The model casing is divided into a water zone, a soil zone and a foundation pit zone; the measuring devices comprise a flowmeter, a stratum displacement meter, a water manometer, a contact electric displacement meter, a pore water pressure gauge, and the like, and is capable of realizing accurate measurement on flow displacement pressure; and the data collecting devices are connected with the measuring devices. The testing apparatus is capable of realizing researches on the mechanism of pumping depression cone and recharge lifting underground water level three-dimensional seepage effects, and the relationship between ground deformation and groundwater table fluctuation.
Description
Technical field
The present invention relates to Geological Engineering, Geotechnical Engineering and Urban Hydrologic geology, environmental geology field, particularly relate to a kind of simulation every-test unit of foundation ditch three dimensional fluid flow and stratum deformation mechanism under synergy falls-fills with.
Background technology
At present, every-foundation ditch three dimensional fluid flow rule and stratum deformation Mechanism Study field under synergy fall-fill with, there is no correlation test device; In foundation pit dewatering project, to be implemented and foundation construction is in dry safe condition for making excavation of foundation pit, underground water table in foundation ditch is reduced to below excavation face by the normal precipitation method that adopts; Because ground-connecting-wall can not intercept hydraulic connection inside and outside foundation ditch sometimes completely.Therefore along with the underground water table of foundation ditch inside reduces, the also corresponding impact be subject in various degree of the outside underground water table of foundation ditch, thus the effective weight stress of the soil body increases, soil solidifying, and then cause stratum to produce the phenomenons such as non-uniform settling, inclination, cracking, even jeopardize surrounding building safety and normal use time serious; In order to eliminate the impact of base pit dewatering on surrounding environment; usually outside foundation ditch, carry out the fluctuation of recharging the outer underground water table of the foundation ditch slowed down caused by base pit dewatering; thus to reduce and the outer underground water table of stable foundation ditch reduces and the stratum deformation that produces therefrom and sedimentation (non-uniform settling), be also conducive to water resource environment under protecting field simultaneously.Therefore, carry out every-fall-fill with foundation ditch three dimensional fluid flow rule and the experimental study of stratum deformation Mechanism Model under synergy there is very high theory and practice using value, and now also not relevant test unit, systematic study can not be carried out to related data and mechanism preferably.Therefore inventing a kind of device that can carry out testing to this is a urgent problem.
Summary of the invention
For above-mentioned situation, for overcoming the defect of existing research technique, the object of the present invention be just to provide a kind of simulation every-test unit of foundation ditch three dimensional fluid flow and stratum deformation mechanism under synergy falls-fills with, solve simulation at present every-fall-fill with the blank of foundation ditch three dimensional fluid flow rule and stratum deformation mechanism simulation experimental facilities under synergy and lack the problems such as systematic study are carried out to related data and mechanism.
Its technical scheme solved is, comprise model casing, model casing is cylindrical steel structure, model casing is inwardly distributed with the circumferentially distribute first permeable steel plate with model casing concentric successively, second permeable steel plate and the 3rd permeable steel plate, permeable steel plate there is multiple through hole, inside and outside permeable steel plate, two sides are fitted with drainage type geotechnique and weave cotton cloth, cut-pff wall is fitted with between geotechnique inside second permeable steel plate weaves cotton cloth and geotechnique outside the 3rd permeable steel plate weaves cotton cloth, identical soil layer is had with in the 3rd permeable steel plate between said first permeable steel plate and the second permeable steel plate, soil layer inside is provided with water-bearing zone, be water body district between said first permeable steel plate and model casing, be soil layer district between first permeable steel plate and the second permeable steel plate, be foundation ditch district in 3rd permeable steel plate, there is building model at soil layer area edge place, multiple pore pressure gauge is had in foundation ditch district, pumped well and inspection well, pumped well is connected with water-bearing zone, multiple pore pressure gauge is had in soil layer district, inverted well, inspection well, first contact electrical measurement displacement meter and strata division sedimentation mark, inverted well and pumped well are equipped with flowmeter, sedimentation mark protection cylinder is set with outside strata division sedimentation mark, strata division sedimentation is put on end and is connected with the second contact electrical measurement displacement meter, first contact electrical measurement displacement meter and the second contact electrical measurement displacement meter are connected with electrical measurement displacement data Acquisition Instrument through wire, pore pressure gauge is connected with pore water pressure data collecting instrument through wire, pore water pressure data collecting instrument and electrical measurement displacement data Acquisition Instrument are connected with host computer through wire respectively, host computer is connected with display screen.
The present invention draws water, recharge, ground-connecting-wall, multiple measuring instrument be in one, the experiment of water withdrawal single well reinjection can be carried out, the many wells of water withdrawal recharge experiment and many wells draw water, and many wells recharge experiment, thus study pumping depression funnel and recharge lifting underground water table three dimensional fluid flow action rule and the relation between stratum deformation and groundwater level fluctuation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the schematic diagram that strata division sedimentation mark and sedimentation mark protection cylinder match.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Provided by Fig. 1 and Fig. 2, the present invention includes model casing, model casing 1 is cylindrical steel structure, model casing 1 is inwardly distributed with and circumferentially distribute first of model casing 1 concentric the permeable steel plate 2 successively, second permeable steel plate 3 and the 3rd permeable steel plate 4, permeable steel plate there is multiple through hole, inside and outside permeable steel plate, two sides are fitted with drainage type geotechnique and weave cotton cloth 5, cut-pff wall 6 is fitted with between geotechnique inside second permeable steel plate 3 weaves cotton cloth and geotechnique outside the 3rd permeable steel plate 4 weaves cotton cloth, identical soil layer is had with in the 3rd permeable steel plate 4 between said first permeable steel plate 2 and the second permeable steel plate 3, soil layer inside is provided with water-bearing zone, be water body district 7 between said first permeable steel plate 2 and model casing 1, be soil layer district 8 between first permeable steel plate 2 and the second permeable steel plate 3, be foundation ditch district 9 in 3rd permeable steel plate 4, there is building model 10 in edge of soil layer district 8, multiple pore pressure gauge 11 is had in foundation ditch district 9, pumped well 12 and inspection well 13, pumped well 12 is connected with water-bearing zone, multiple pore pressure gauge 11 is had in soil layer district, inverted well 14, inspection well 13, first contact electrical measurement displacement meter 15 and strata division sedimentation mark 16, inverted well 14 and pumped well 12 are equipped with flowmeter 17, sedimentation mark protection cylinder 18 is set with outside strata division sedimentation mark 16, strata division sedimentation mark 16 upper end is connected with the second contact electrical measurement displacement meter 19, first contact electrical measurement displacement meter 15 and the second contact electrical measurement displacement meter 19 are connected with electrical measurement displacement data Acquisition Instrument 20 through wire, pore pressure gauge 11 is connected with pore water pressure data collecting instrument 21 through wire, pore water pressure data collecting instrument 21 and electrical measurement displacement data Acquisition Instrument 20 are connected with host computer 22 through wire respectively, host computer 22 is connected with display screen 23.
Said water body district 7 is connected with water tank 25 through water-supply-pipe 24, water-supply-pipe 24 is equipped with flowmeter 17, water pressure table 26 and valve 27, and water tank 25 uninterruptedly provides water for water body in foundation ditch district 9 periphery hydraulic boundary conditions, and output is calculated by flowmeter 17.
Said soil layer has five layers, is from up to down the first soil layer, the second soil layer, the 3rd soil layer, the 4th soil layer and the 5th soil layer successively.
Said inverted well 14 centered by foundation ditch district 9 radially blossom type arrange, said inverted well 14 is less than the distance of building model 10 to center, foundation ditch district 9 to the distance at center, foundation ditch district 9, arrangement pitch with single inverted well 14 effectively the radius of influence for minimum spacing.
Said pumped well 12 has drainage well and pressure reduction well respectively.
Said cut-pff wall 6 is made up of light plastic plate, is used for simulating ground-connecting-wall.
Said pore pressure gauge 11 is arranged in different soil layers respectively, is used for measuring the change of soil layer water pressure.
Said contact electrical measurement displacement meter is used for measuring the formation displacement change caused because of WATER LEVEL CHANGES.
Of the present invention recharging arranges inverted well 14 between foundation ditch district 9 and protected building model 10, while drawing water by inverted well 14 to groundwater recharge, and make the peripheral protected region groundwater level fluctuation amplitude in foundation ditch district 9 remain unchanged or control within allowed band, solve at present every-problem of the correlation test device blank in foundation ditch three dimensional fluid flow rule and stratum deformation Mechanism Study field under synergy is fallen-is filled with, this device not only can be used to research single well reinjection amount, inverted well space position and quantity are to foundation ditch three dimensional fluid flow action rule, and can study foundation ditch three dimensional fluid flow rule and stratum settlement be out of shape between interactively, simultaneously also can by changing the ground-connecting-wall degree of depth to the pump-out in the pumped well unit interval, foundation ditch three dimensional fluid flow rule and stratum settlement deformation mechanism are furtherd investigate.
The present invention draws water, recharge, ground-connecting-wall, multiple measuring instrument be in one, the experiment of water withdrawal single well reinjection can be carried out, the many wells of water withdrawal recharge experiment and many wells draw water, and many wells recharge experiment, thus study pumping depression funnel and recharge lifting underground water table three dimensional fluid flow action rule and the relation between stratum deformation and groundwater level fluctuation.
Claims (7)
1. a simulation every-test unit of foundation ditch three dimensional fluid flow and stratum deformation mechanism under synergy falls-fills with, comprise model casing, it is characterized in that, model casing (1) is cylindrical steel structure, model casing (1) is inwardly distributed with the circumferentially distribute first permeable steel plate (2) with model casing (1) concentric successively, second permeable steel plate (3) and the 3rd permeable steel plate (4), permeable steel plate there is multiple through hole, inside and outside permeable steel plate, two sides are fitted with drainage type geotechnique and weave cotton cloth (5), second permeable steel plate (3) inner side geotechnique weave cotton cloth and the 3rd permeable steel plate (4) outside geotechnique weave cotton cloth between be fitted with cut-pff wall (6), identical soil layer is had with in the 3rd permeable steel plate (4) between said first permeable steel plate (2) and the second permeable steel plate (3), soil layer inside is provided with water-bearing zone, be water body district (7) between said first permeable steel plate (2) and model casing (1), be soil layer district (8) between first permeable steel plate (2) and the second permeable steel plate (3), be foundation ditch district (9) in 3rd permeable steel plate (4), there is building model (10) in soil layer district (8) edge, multiple pore pressure gauge (11) is had in foundation ditch district (9), pumped well (12) and inspection well (13), pumped well (12) is connected with water-bearing zone, multiple pore pressure gauge (11) is had in soil layer district, inverted well (14), inspection well (13), first contact electrical measurement displacement meter (15) and strata division sedimentation mark (16), inverted well (14) and pumped well (12) are equipped with flowmeter (17), sedimentation mark protection cylinder (18) is set with outside strata division sedimentation mark (16), strata division sedimentation mark (16) upper end is connected with the second contact electrical measurement displacement meter (19), first contact electrical measurement displacement meter (15) and the second contact electrical measurement displacement meter (19) are connected with electrical measurement displacement data Acquisition Instrument (20) through wire, pore pressure gauge (11) is connected with pore water pressure data collecting instrument (21) through wire, pore water pressure data collecting instrument (21) and electrical measurement displacement data Acquisition Instrument (20) are connected with host computer (22) through wire respectively, host computer (22) is connected with display screen (23).
2. a kind of simulation according to claim 1 every-test unit of foundation ditch three dimensional fluid flow and stratum deformation mechanism under synergy falls-fills with, said water body district (7) is connected with water tank (25) through water-supply-pipe (24), water-supply-pipe (24) is equipped with flowmeter (17), water pressure table (26) and valve (27).
3. a kind of simulation according to claim 1 every-test unit of foundation ditch three dimensional fluid flow and stratum deformation mechanism under synergy falls-fills with, said inverted well (14) centered by foundation ditch district (9) radially blossom type arrange, effectively the radius of influence is for minimum spacing with single inverted well (14) for arrangement pitch, and said inverted well (14) is less than the distance of building model (10) to foundation ditch district (9) center to the distance at foundation ditch district (9) center.
4. a kind of simulation according to claim 1 every-test unit of foundation ditch three dimensional fluid flow and stratum deformation mechanism under synergy falls-fills with, said pumped well (12) has drainage well and pressure reduction well respectively.
5. a kind of simulation according to claim 1 every-test unit of foundation ditch three dimensional fluid flow and stratum deformation mechanism under synergy falls-fills with, said cut-pff wall (6) is made up of light plastic plate.
6. a kind of simulation according to claim 1 every-test unit of foundation ditch three dimensional fluid flow and stratum deformation mechanism under synergy falls-fills with, said soil layer has five layers, is from up to down the first soil layer, the second soil layer, the 3rd soil layer, the 4th soil layer and the 5th soil layer successively.
7. a kind of simulation according to claim 6 every-test unit of foundation ditch three dimensional fluid flow and stratum deformation mechanism under synergy falls-fills with, said pore pressure gauge (11) is arranged in different soil layers respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310292321.9A CN103487563B (en) | 2013-07-12 | 2013-07-12 | Testing apparatus used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310292321.9A CN103487563B (en) | 2013-07-12 | 2013-07-12 | Testing apparatus used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism |
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| CN103487563A CN103487563A (en) | 2014-01-01 |
| CN103487563B true CN103487563B (en) | 2015-06-03 |
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| CN201310292321.9A Expired - Fee Related CN103487563B (en) | 2013-07-12 | 2013-07-12 | Testing apparatus used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism |
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