CN205374435U - Soil layer seepage flow experimental apparatus with adjustable flood peak and seepage flow route - Google Patents
Soil layer seepage flow experimental apparatus with adjustable flood peak and seepage flow route Download PDFInfo
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- CN205374435U CN205374435U CN201521006971.3U CN201521006971U CN205374435U CN 205374435 U CN205374435 U CN 205374435U CN 201521006971 U CN201521006971 U CN 201521006971U CN 205374435 U CN205374435 U CN 205374435U
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Abstract
The utility model provides a soil layer seepage flow experimental apparatus with adjustable flood peak and seepage flow route is connected to form through three connecting catheters by a main part mold box and three flood peak regulating box. The main part mold box is the box structure, insidely separates for the middle room of banketing through the median septum, and is equipped with intake chamber that the water conservancy diversion connects respectively and goes out the hydroecium on, go out the hydroecium down to be equipped with and installed the sealed lid of room water proof that bankets of dismantling that the water conservancy diversion connects, can dismantle the sealed lid of intake chamber, can dismantle out the hydroecium and seal up and cover. The flood peak regulating box is the cylindricality case that sealed upper end opening, bottom, and tank wall top -down sets up the water conservancy diversion of intaking respectively and connects, and a play water water conservancy diversion connects to and a drainage water conservancy diversion connects. The intake chamber of main part mold box goes out the hydroecium on, goes out three water conservancy diversion on the hydroecium down to connect separately the drainage water conservancy diversion articulate with three different flood peak regulating box through a connecting catheters, constitutes whole experimental apparatuss, also can be played a role alone by the main part mold box when experiment needs. The utility model discloses simply, solid structure, low cost through adjusting, can make water only take place unidirectional one dimensional fluid flow in the experiment soil body, also can carry out two dimensional fluid flow to can adjust the flood peak on experiment soil body both sides and upper portion in in a big way, can carry out the experiment of multiple soil layer seepage flow, application scope is wider, provides testing method and equipment for scientific research, engineering design etc..
Description
Technical field
The utility model relates to the experimental simulation device in a kind of Geotechnical Engineering field, particularly relate to a kind of indoor experimental apparatus for soil layer seepage flow Study on Deformation direction.
Background technology
The disasters such as China's surface subsidence in recent years, surface collapse take place frequently, the life production of the people is caused tremendous influence, cause the attention of government and scholars, finding the many groundwater level fluctuations caused due to transition groundwater abstraction of its main cause, in particular, in that the seepage flow under pressure water top news part, current experimental facilities is difficult in a big way adjustment head size, to simulate practical adjustments better, also tending to, just for a kind of seepage direction, be not easy to regulate, applicable surface is narrower.
Summary of the invention
Purpose: design is a kind of simple and reliable for structure, for carrying out the experimental provision of soil layer seepage characteristic research, and makes this experimental provision can quantitatively regulate head size in the soil body by demand, and effectively regulates the percolation path of water.
Technical scheme: one head of the present invention and the adjustable soil layer permeability experimental facility of percolation path, is formed by connecting by three connection conduits by main body mould molding box and three head regulating boxs, and described main body mould molding box individually plays a role also dependent on experimental design.
Described main body mould molding box is box-structure, the internal upper water-out room that inner space is divided into the intake chamber in left side, middle room of banketing, right side by demarcation strip, and is positioned at four chamber such as the room lower water-supplying chamber with lower section, both upper water-out rooms of banketing；Dividing plate between adjacent chamber has water hole to connect, and water hole be square array arrangement, its gap uniformity；Indoor of banketing have the dividing plate place of water hole to be all equipped with permeable slabstone, be all provided with movable water proof rubber stopper, can clog water hole on one side, it is possible to open by upper water-out room and each water hole at the space bar place of lower water-supplying chamber；Equipped with water inlet flow guiding connector above intake chamber lateral wall, upper water-out outdoor sidewall is arranged below upper water-out flow guiding connector, lower water-supplying chamber lateral wall is arranged below lower water outlet flow guiding connector, main body mould molding box is also equipped with a dismountable room of banketing every water-tight lid, cover equipped with top cover flow guiding connector, and a dismountable intake chamber seals lid, one dismountable upper water-out room seals lid, and it is equipped with two water-stop sheets, it it is a square hard plastic board, one gluing and water hole quantity on both sides, the room dividing plate that bankets, position, the soft water proof rubber stopper that size and arrangement match, can according to experiment need in order to block banket between room and intake chamber or and upper water-out room between dividing plate on water hole, also may be used.
Described head regulating box is the cylindrical tank of upper end open, bottom seal, and tank wall upper end is provided with a water inlet flow guiding connector, and tank wall lower end is equipped with a drain flow guiding connector and a water outlet flow guiding connector.
Described connection conduit adopts PVC water pipe, and its two ends all can connect flow guiding connector or choke valve, and meets leakproof requirement after ensureing to connect.
The top cover flow guiding connector of described main body mould molding box, water inlet flow guiding connector, upper water-out flow guiding connector, lower water outlet flow guiding connector, and the water inlet flow guiding connector of head regulating box, drain flow guiding connector, water outlet flow guiding connector are the short pipe of steel, one end is connected on tank wall, the other end has female thread, choke valve can be installed, it is possible to dismounting.
The room of banketing of described main body mould molding box, intake chamber, upper water-out room upper end open place inside each cementing agent cohered a water proof rubber washer, can make to fit tightly every water-tight lid and model casing.
The front tank wall of described main body mould molding box is poly (methyl methacrylate) plate, poly (methyl methacrylate) plate is etched with master scale from bottom to top, can measure case indoor soil thickness or height of water level, and lucite tank wall periphery is provided with the spacing guardrail of " king " shape steel, can limiting the deformation of lucite tank wall, the tank wall of all the other sides is steel plate assembly and welds and make with internal partition；Be provided with three pieces of gripper shoes inside lower water-supplying chamber, in order to limit the room bottom deformation that bankets, gripper shoe also on be drilled with water hole.
Described head regulating box material is lucite, and lucite tank wall is etched with the scale of standard from bottom to top, and with bottom for zero point, can height of water level in measure case.
Stainless steel revolute pair component and a water proof rubber stopper that described movable water proof rubber stopper is fixed by an end connect and compose, by rotating revolute pair component, it is possible to water proof rubber stopper clogs water hole on one side, or is taken out from water hole by water proof rubber stopper.
The connected mode of described main body mould molding box and three head regulating boxs is: the water inlet flow guiding connector of main body mould molding box and the drain flow guiding connector of first head regulating box are connected by a connection conduit, the drain flow guiding connector of the top cover flow guiding connector of main body mould molding box and second head regulating box is connected by a connection conduit, and the upper water-out flow guiding connector of main body mould molding box or the drain flow guiding connector of lower water outlet flow guiding connector and the 3rd head regulating box are connected by a connection conduit.
The using method of the present invention is as follows: 1, when the height of water level of experimental design and amplitude of variation are in main body mould molding box altitude range, the main body mould that can be used alone molding box, and it is now detachable every water-tight lid without three of model casing top, only fill soil layer according to requirement of experiment in room banketing, bury corresponding test instrunment underground, and empirically require that intake chamber and upper water-out indoor at main body mould molding box are filled to specified altitude assignment, then test.
2, water inlet flow guiding connector on main body mould molding box, upper water-out flow guiding connector, lower water outlet flow guiding connector, one choke valve of each installation on top cover flow guiding connector, water inlet flow guiding connector, the choke valve that top cover flow guiding connector place installs is used for controlling water inlet flow velocity and flow, upper water-out flow guiding connector, the choke valve that lower water outlet flow guiding connector place installs is used for controlling Water discharge flow speed and flow, and according to the scale check and correction water level being etched on lucite tank wall, also intake chamber can be opened when without SEA LEVEL VARIATION is accurately controlled, banket room or upper water-out ceiling portion every the direct water filling of water-tight lid, the height of water level of fast approaching test requirements document；Water hole and permeable slabstone that current can pass through between room on median septum flows between each chamber, by regulate flow guiding connector of intaking, upper water-out flow guiding connector, lower water outlet flow guiding connector three place choke valve water-in and water-out make the to banket water level of soil body both sides, room reach designing requirement.
3, when being used alone horizontal seepage flow in main body mould molding box and the requirement of experiment water soil body in room of banketing, first open upper water-out room every water-tight lid, the movable water proof rubber stopper on the water hole side between upper water-out room and lower water-supplying chamber is shut, and fix, it is then shut off the choke valve that lower water outlet flow guiding connector place installs, by regulating the choke valve that water inlet flow guiding connector place installs, or top cover flow guiding connector place install throttle valve adjustment Water discharge flow speed and flow, thus produce water-head in soil body both sides, room of banketing and produce head, water can be made in the soil body from seepage flow horizontal between intake chamber and upper water-out room.
4, when being used alone vertical seepage flow in main body mould molding box and the requirement of experiment water soil body in room of banketing, first it is mounted and sealed the detachable every water-tight lid of room of banketing, open intake chamber and upper water-out room every water-tight lid, the movable water proof rubber stopper on the water hole side between upper water-out room and lower water-supplying chamber is blocked, and with water-stop sheet by intake chamber and room of banketing, upper water-out room blocks one by one with the water hole on the space bar of room of banketing, and fix, then the choke valve that water outlet flow guiding connector place installs cuts out, by regulating the throttle valve adjustment that water inlet flow guiding connector place installs, or the choke valve water outlet that top cover flow guiding connector place installs, thus producing head at the room soil body upper and lower that bankets, allow for water in the soil body between intake chamber and lower water-supplying chamber vertical seepage flow.
5, when being used alone two dimensional fluid flow in main body mould molding box and the requirement of experiment water soil body in room of banketing, do not block any water hole, and so as to keep clear, it is then shut off the choke valve that upper water-out flow guiding connector place installs, by regulating the choke valve that water inlet flow guiding connector place installs, or the throttle valve adjustment water outlet that lower water outlet flow guiding connector place installs, and level vertical at the room soil body that bankets all produces head, allowing for that water does in the soil body both can horizontal seepage flow, it is also possible to the two-dimensional flow of vertical seepage flow.
null6、When the height of water level of experimental design and amplitude of variation are more than main body mould molding box oneself height scope，Main body mould molding box needs to couple together one system of formation jointly to play a role with three head regulating boxs，First three head regulating boxs are put as design height，Empirically require to fill soil layer to indoor of banketing again，After burying corresponding test instrunment underground，Cover intake chamber respectively、Banket room、Upper water-out room every water-tight lid，And carry out sealing with water proof fluid sealant，Then conduit is connected by the water inlet flow guiding connector of main body mould molding box、The drain flow guiding connector of the head regulating box that top cover flow guiding connector is different from two respectively connects，Then the percolation path requirement according to experimental design，The drain flow guiding connector that the upper water-out flow guiding connector of main body mould molding box or lower water outlet flow guiding connector optionally connect conduit and the 3rd head regulating box connects.
7, respectively by three head regulating boxs by connecting after conduit is connected with main body mould molding box, water can pass through to connect conduit free-flow between head regulating box and main body mould molding box, at water inlet flow guiding connector and the water outlet flow guiding connector place of head regulating box, choke valve is installed, by regulating throttle valve adjustment flow of inlet water and the flow velocity that the water inlet flow guiding connector place on head regulating box installs, the throttle valve adjustment water flow installed by the water outlet flow guiding connector place of head regulating box and flow velocity, and by changing the difference in height between head regulating box and main body mould molding box, can make to banket in main body mould molding box in room the hydraulic pressure suffered by the soil body and head empirically requires accurately to regulate.
8, when main body mould molding box is connected use with head regulating box, control the method for water percolation path in the indoor soil body that bankets and step 3, operational approach when agent model case is used alone in 4,5 basically identical, only the choke valve on the main body mould molding box controlling water-in and water-out is changed the choke valve installed for the corresponding flow guiding connector place being connected on the head regulating box at this place.
This utility model advantage: device simple structure, material and spare and accessory parts are easily obtained, with low cost, easy to make, and various sizes of model can be fabricated to according to requirement of experiment.
By Selective plugging or open the water hole on main body mould molding box internal partition, and choose flow guiding connector water-in and water-out appropriate on main body mould molding box, can facilitate and the current percolation path in the Control release soil body quickly, meet different Research Requirements, save experimental facilities spending.
The main body mould molding box of device self can regulate hydrostatic pressure and the head of the laboratory experiment soil body that bankets in little scope, also main body mould molding box and head regulating box can be connected and composed system, by adjusting the relative altitude between head regulating box and main body mould molding box, and water level and the rate of change in adjustment head regulating box regulates the hydrostatic pressure testing the soil body and head in the larger context, comparing this type of conventional apparatus, its suitability is better.
The main body mould molding box side tank wall of device and the material of head regulating box are transparent organic glass, and are etched with scale, it is simple to determine height of water level, also allow for observing the change of the experiment soil body of indoor of banketing.
Accompanying drawing explanation
Fig. 1 is head of the present invention and the adjustable soil layer seepage experimental apparatus schematic diagram of percolation path.
Fig. 2 is agent model box structure and accessory schematic diagram.
Fig. 3 is that the internal view after water-tight lid installed by main body mould molding box.
Fig. 4 is head regulating box schematic diagram.
Fig. 5 is water-stop sheet side schematic view.
Fig. 6 is movable water proof rubber stopper schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, further illustrate specific embodiment of the invention situation, connect three head regulating boxs for main body mould molding box and control a kind of situation that water seepage direction is horizontal direction.
Referring to figs. 1 through Fig. 6, a kind of head and the adjustable soil layer seepage experimental apparatus of percolation path, it is connected to form by three connection conduits by the head regulating box 2,3,4 that main body mould molding box 1 is identical with three, it is possible to individually played a role by main body mould molding box 1.Described main body mould molding box 1 is box-structure, the internal upper water-out room 21 that by demarcation strip, inner space is divided into the intake chamber 13 in left side, middle room 14 of banketing, right side, and it is positioned at four chamber such as the room 14 lower water-supplying chamber 15 with lower section, both upper water-out rooms 21 of banketing；Dividing plate between adjacent chamber has water hole to connect, and water hole be square array arrangement, its gap uniformity；Indoor of banketing have the dividing plate place of water hole to be all equipped with permeable slabstone, be all provided with movable water proof rubber stopper 24, can clog water hole on one side, it is possible to open by upper water-out room 21 and each water hole at the space bar place of lower water-supplying chamber 15；Equipped with water inlet flow guiding connector 11 above intake chamber 13 lateral wall, upper water-out outdoor sidewall is arranged below upper water-out flow guiding connector 22, lower water-supplying chamber lateral wall is arranged below lower water outlet flow guiding connector 23, main body mould molding box is also equipped with a dismountable room of banketing every water-tight lid 17, cover equipped with top cover flow guiding connector 16, and a dismountable intake chamber seals lid 8, a dismountable upper water-out room seals lid 18, and is equipped with two water-stop sheets 7；Water-stop sheet 7 is a square hard plastic board, the water proof rubber stopper 29 that one gluing and water hole quantity, position, size and arrangement on both sides, room 14 dividing plate that bankets match, can according to experiment need in order to block banket between room 14 and intake chamber 13 or and upper water-out room 21 between dividing plate on water hole, it is possible to need not；Described head regulating box 2,3,4 is the cylindrical tank of upper end open, bottom seal, and tank wall upper end is provided with a water inlet flow guiding connector 27, and tank wall lower end is equipped with a drain flow guiding connector 26 and a water outlet flow guiding connector 27；Described connection conduit adopts PVC water pipe, and its two ends all can connect flow guiding connector or choke valve 6, and meets leakproof requirement after ensureing to connect.
The top cover flow guiding connector 16 of described main body mould molding box, water inlet flow guiding connector 11, upper water-out flow guiding connector 22, lower water outlet flow guiding connector 23, and the water inlet flow guiding connector 27 of head regulating box, drain flow guiding connector 26, water outlet flow guiding connector 28 are the short pipe of steel, one end is connected on tank wall, the other end has female thread, choke valve 6 can be installed, it is possible to dismounting.
The room 14 of banketing of described main body mould molding box, intake chamber 13, upper water-out room 21 upper end open place inside each cementing agent cohered a water proof rubber washer, can make each to fit tightly every water-tight lid and model casing.
The front tank wall of described main body mould molding box is poly (methyl methacrylate) plate, is etched with master scale from bottom to top on the right side of poly (methyl methacrylate) plate, can measure case indoor soil thickness or height of water level；Lucite tank wall periphery is provided with the spacing guardrail 12 of " king " shape steel, can limit the deformation of lucite tank wall, and the tank wall of all the other sides is steel plate assembly and welds and make with internal partition；Being provided with three pieces of gripper shoes 25 inside lower water-supplying chamber, gripper shoe 25 upper end is welded with the base plate of room 14 of banketing, and lower end is welded with the base plate of lower water-supplying chamber 15, in order to limit the room bottom deformation that bankets, gripper shoe also on be drilled with water hole.
Described head regulating box material is lucite, and lucite tank wall is etched with the scale of standard from bottom to top, and with bottom for zero point, can height of water level in measure case.
Stainless steel revolute pair component 32 and a water proof rubber stopper 31 that described movable water proof rubber stopper 24 is fixed by an end connect and compose, by rotating revolute pair component 32, water proof rubber stopper 31 can be clogged water hole on one side, or water proof rubber stopper 31 is taken out from water hole.
The connected mode of described main body mould molding box and three head regulating boxs is: the water inlet flow guiding connector of main body mould molding box and the drain flow guiding connector of first head regulating box are connected by a connection conduit, the drain flow guiding connector of the top cover flow guiding connector of main body mould molding box and second head regulating box is connected by a connection conduit, and the upper water-out flow guiding connector of main body mould molding box or the drain flow guiding connector of lower water outlet flow guiding connector and the 3rd head regulating box are connected by a connection conduit.
Experimental procedure: fill soil layer in indoor of banketing according to requirement of experiment, and bury underground and measure instrument accordingly, then close room of banketing, intake chamber, upper water-out room each corresponding every water-tight lid, and choke valve is installed at the lower water outlet flow guiding connector place on main body mould molding box.
Take three head regulating boxs, and choke valve is installed at the water inlet flow guiding connector on its tank wall and water outlet water conservancy diversion place respectively, respectively by the water inlet flow guiding connector of main body mould molding box, top cover flow guiding connector, the drain flow guiding connector of upper water-out flow guiding connector and three head regulating boxs couples together by connecting conduit, and respectively three head regulating boxs are placed according to requirement of experiment and to have certain height difference place with main body mould molding box, and the head regulating box being connected with intake chamber is compiled for head regulating box 2, the head regulating box being connected with the room of banketing is compiled as head regulating box 3, the head regulating box being connected with upper water-out room is compiled as head regulating box 4, as shown in Figure 1 finally.
It is first shut off the choke valve that the lower water outlet flow guiding connector place of main body mould molding box installs, and the choke valve that the water outlet flow guiding connector place on three head regulating boxs installs, then according to requirement of experiment, by the throttle valve control water inlet that the water inlet flow guiding connector place of three head regulating boxs installs, water level in head regulating box and main body mould molding box is made to reach experimental design water level, then according to the choke valve closing three head regulating box water inlet flow guiding connector places, open the choke valve that the water outlet flow guiding connector place of head regulating box 4 installs, and regulate to relevant position, the water level in head regulating box 3 is made empirically to require to decline, the height of water level that record declines and corresponding time, finally read in main body mould molding box the data of the instrument feedback buried underground indoor of banketing, complete experiment.
Claims (7)
1. a head and the adjustable soil layer seepage experimental apparatus of percolation path, it is connected to form by three connection conduits by the head regulating box that a main body mould molding box and three are same, also solely can be played a role by agent model packing list, it is characterized in that: described main body mould molding box is box-structure, the internal upper water-out room that by demarcation strip, inner space is divided into the intake chamber in left side, middle room of banketing, right side, and it is positioned at four chamber such as the room lower water-supplying chamber with lower section, both upper water-out rooms of banketing；Dividing plate between adjacent chamber has water hole to connect, and water hole be square array arrangement, its gap uniformity；Indoor of banketing have the dividing plate place of water hole to be all equipped with permeable slabstone, be all provided with movable water proof rubber stopper, can clog water hole on one side, it is possible to open by upper water-out room and each water hole at the space bar place of lower water-supplying chamber；Equipped with water inlet flow guiding connector above intake chamber lateral wall, upper water-out outdoor sidewall is arranged below upper water-out flow guiding connector, lower water-supplying chamber lateral wall is arranged below lower water outlet flow guiding connector, main body mould molding box is also equipped with a dismountable room of banketing every water-tight lid, cover equipped with top cover flow guiding connector, and a dismountable intake chamber seals lid, one dismountable upper water-out room seals lid, and it is equipped with two water-stop sheets, it it is a square hard plastic board, one gluing and water hole quantity on both sides, the room dividing plate that bankets, position, the water proof rubber stopper that size and arrangement match, can according to experiment need in order to block banket between room and intake chamber or and upper water-out room between dividing plate on water hole, also may be used；Described head regulating box is the cylindrical tank of upper end open, bottom seal, and tank wall upper end is provided with a water inlet flow guiding connector, and tank wall lower end is equipped with a drain flow guiding connector and a water outlet flow guiding connector；Described connection conduit adopts PVC water pipe, and its two ends all can connect flow guiding connector or choke valve, and meets leakproof requirement after ensureing to connect.
2. head according to claim 1 and the adjustable soil layer seepage experimental apparatus of percolation path, it is characterized in that: the top cover flow guiding connector of described main body mould molding box, water inlet flow guiding connector, upper water-out flow guiding connector, lower water outlet flow guiding connector, and the water inlet flow guiding connector of head regulating box, drain flow guiding connector, water outlet flow guiding connector are the short pipe of steel, one end is connected on tank wall, the other end has female thread, choke valve can be installed, it is possible to dismounting.
3. head according to claim 1 and the adjustable soil layer seepage experimental apparatus of percolation path, it is characterized in that: the room of banketing of described main body mould molding box, intake chamber, upper water-out room upper end open place inside each cementing agent cohered a water proof rubber washer, can make to fit tightly every water-tight lid and model casing.
4. head according to claim 1 and the adjustable soil layer seepage experimental apparatus of percolation path, it is characterized in that: the front tank wall of described main body mould molding box is poly (methyl methacrylate) plate, it is etched with master scale from bottom to top on the right side of poly (methyl methacrylate) plate, can measure case indoor soil thickness or height of water level；Lucite tank wall periphery is provided with the spacing guardrail of " king " shape steel, can limit the deformation of lucite tank wall, and the tank wall of all the other sides is steel plate assembly and welds and make with internal partition；Three pieces of gripper shoes it are provided with, in order to limit the room bottom deformation that bankets inside lower water-supplying chamber；Gripper shoe also on be drilled with water hole.
5. head according to claim 1 and the adjustable soil layer seepage experimental apparatus of percolation path, it is characterized in that: described head regulating box material is lucite, lucite tank wall is etched with the scale of standard from bottom to top, and with bottom for zero point, can height of water level in measure case.
6. head according to claim 1 and the adjustable soil layer seepage experimental apparatus of percolation path, it is characterized in that: stainless steel revolute pair component and a water proof rubber stopper that described movable water proof rubber stopper is fixed by an end connect and compose, by rotating revolute pair component, water proof rubber stopper can be clogged water hole on one side, or water proof rubber stopper is taken out from water hole.
7. head according to claim 1 and the adjustable soil layer seepage experimental apparatus of percolation path, it is characterized in that: the connected mode of described main body mould molding box and three head regulating boxs is, the water inlet flow guiding connector of main body mould molding box and the drain flow guiding connector of first head regulating box are connected by a connection conduit, the drain flow guiding connector of the top cover flow guiding connector of main body mould molding box and second head regulating box is connected by a connection conduit, the upper water-out flow guiding connector of main body mould molding box or the drain flow guiding connector of lower water outlet flow guiding connector and the 3rd head regulating box are connected by a connection conduit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015202689269 | 2015-04-29 | ||
| CN201520268926 | 2015-04-29 |
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| CN205374435U true CN205374435U (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521006971.3U Expired - Fee Related CN205374435U (en) | 2015-04-29 | 2015-12-08 | Soil layer seepage flow experimental apparatus with adjustable flood peak and seepage flow route |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198919A (en) * | 2015-05-29 | 2016-12-07 | 长沙理工大学 | A kind of head and percolation path adjustable soil layer seepage experimental apparatus |
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2015
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198919A (en) * | 2015-05-29 | 2016-12-07 | 长沙理工大学 | A kind of head and percolation path adjustable soil layer seepage experimental apparatus |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20161208 |