CN206905841U - Have bottom survey hole underground water level observation device and Observable level of ground water have bottom survey hole - Google Patents
Have bottom survey hole underground water level observation device and Observable level of ground water have bottom survey hole Download PDFInfo
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- CN206905841U CN206905841U CN201720425550.7U CN201720425550U CN206905841U CN 206905841 U CN206905841 U CN 206905841U CN 201720425550 U CN201720425550 U CN 201720425550U CN 206905841 U CN206905841 U CN 206905841U
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Abstract
The utility model discloses one kind to have bottom to survey hole underground water level observation device, and underground water level observation device includes observation well casing, elbow, horizontal tube, stainless steel tube, communicating valve, air bleeding valve, mud valve, U-shaped sediment deposition pipe, discharge pipeline and fluid level transmitter.Observation well casing is located at vertically and extremely surveyed at the loaded filter of hole；Stainless steel tube is embedded in the wall of survey hole, is connected by the horizontal tube and elbow that are laid in loaded filter with inspection well pipe end；It is laid on the horizontal tube surveyed in the gallery of hole and is sequentially provided with communicating valve, U-shaped sediment deposition pipe, air bleeding valve and fluid level transmitter, the discharge pipeline of U-shaped sediment deposition bottom of the tube connect band mud valve, constituting Observable has bottom to survey hole underground water level observation device, there is further disclosed herein Observable level of ground water has bottom to survey hole, the utility model observation device and Observable level of ground water have bottom to survey hole, it can effectively solve the problem that the problem of silt in underground water causes line clogging, it is small that well casing floor space is observed simultaneously, it is practical.
Description
Technical field
It the utility model is related to a kind of underground water level measurement device, and in particular to one kind has bottom to survey hole observation of groundwater levels dress
Put and Observable level of ground water have bottom survey hole, belong to hydraulic engineering and agriculture field.
Background technology
" having bottom to survey hole " is a kind of test facilities applied in agricultural sciences observational study, and it is built in field, the bottom of by
Portion and four walls are formed, waterproof, the hole of for example same rectangle of shape, therefore are called " surveying hole ".
There is bottom to survey the level of ground water in hole and refer to that having bottom to survey table distance in the soil of hole surveys the relative elevation for cheating native face.
The development of related irrigation experiment and research process, underground water equilibrium of supply and demand calculating is carried out to surveying when hole soil is poured water,
To ensure to survey hole irrigation water capacity, avoid causing crop waterflooding or water resource waste.Therefore, accurate understanding has bottom to survey hole underground water
Position change information, grasp have bottom to survey hole Changes in underground water changing rule, so as to there is bottom to survey hole level of ground water control optimal
In the range of be particularly important.
Have at present in agricultural water conservancy project using more underground water level observation device using laser ranging to obtain water level
The observation system of information, if Publication No. CN 106197614A are in invention disclosed patent " level of ground water on December 7th, 2016
Automatic observing system ", but the system cost is higher, and the clean of optical system need to be kept to ensure measurement result；Also there is utilization
The self-control underground water level measurement equipment of fixed pulley principle, if Publication No. CN 204154359U are disclosed on 2 11st, 2015
Utility model patent " underground water level observation device ", but the device is using measurement rope and float metering Decline or rise of groundwater level, measurement
As a result need manually to be identified, error is larger, and automaticity is relatively low；Also there is the automatic Observation of installation pressure type water gauge
Well, such as Publication No. CN 203785737U, " observation of groundwater levels is set utility model patent disclosed in August in 2014 20 days
Apply ", but pressure type water gauge is directly arranged in inspection well by the device, and the internal diameter tool of inspection well there are certain requirements, take and survey
Defect subspaces are big, it is difficult to meet have bottom to survey the needs that hole carries out small area irrigation tests.Further, since there is bottom to survey in the underground water in hole
Silt generally be present, clogging is easily caused using common pressure-measuring pipe, also can bring unfavorable shadow to the accuracy of measurement result
Ring.
Utility model content
In view of the deficienciess of the prior art, the utility model proposes one kind is simple in construction, metering is accurate, floor space
Small, can effectively solve the problem that pressure measurement pipeline blockage problem has bottom to survey hole underground water level observation device and Observable level of ground water to have
Hole is surveyed at bottom.
The utility model adopts the following technical scheme that：
One kind has bottom to survey hole underground water level observation device, including observation well casing, horizontal tube, communicating valve, U-shaped sediment deposition
Pipe, discharge pipeline and the fluid level transmitter and level digital display instrument being connected by data wire, vertical being located at of observation well casing are treated
Survey in the survey hole of level of ground water, inspection well bottom of the tube is connected by elbow with horizontal tube one end, and the horizontal tube other end passes through connection
Valve is connected with U-shaped sediment deposition pipe one end, and the U-shaped sediment deposition pipe other end is connected with fluid level transmitter, U-shaped sediment deposition
The U-shaped bottom of pipe is down-set, and discharge pipeline is located at the U-shaped bottom of U-shaped sediment deposition pipe, and spoil disposal is additionally provided with the middle part of the discharge pipeline
Valve, the observation well casing are provided with multiple densely covered permeable holes, and the observation well casing is externally provided with parcel and is covered on permeable hole
Filter screen.
As an improvement, the U-shaped sediment deposition pipe of the close fluid level transmitter is provided with air bleeding valve.
As an improvement, it is plum blossom type hole that the permeable hole of the observation well casing, which is only distributed in middle part and bottom, permeable hole, covering
Filter screen in plum blossom type hole is nylon wire.
As an improvement, the inspection well tube top portion is provided with plug, the filter screen being covered in plum blossom type hole that wraps up has 2-3
Layer.
A kind of Observable level of ground water has bottom to survey hole, including surveys hole, observation well casing, horizontal tube, communicating valve, U-shaped silt
Sediment tube, discharge pipeline and the fluid level transmitter and level digital display instrument being connected by data wire, interior be provided with survey hole are used for kind
The backfill of plant, survey to cheat gallery for the survey of artificial observation outside one side walls of hole, the observation well casing is vertical to be located at
Survey hole backfill in, inspection well bottom of the tube is connected by elbow with horizontal tube one end, by survey cheat gallery wall in provided with
The connected pre-buried stainless steel tube of horizontal tube, the U-shaped bottom of the U-shaped sediment deposition pipe is directed downwardly in the gallery of survey hole, U-shaped mud
Husky sediment tube one end is connected by communicating valve with the stainless steel tube being embedded in advance in wall, U-shaped the sediment deposition pipe other end and liquid
Position transmitter is connected, and discharge pipeline is located at the U-shaped bottom of U-shaped sediment deposition pipe, and mud valve is additionally provided with the middle part of the discharge pipeline；It is described
Observation well casing is provided with multiple densely covered permeable holes, and the observation well casing is externally provided with the filter screen that parcel is covered on permeable hole.Filter
Net is closely knit by observation well casing winding, and filter screen by permeable hole into the underground water progress observed in well casing to being filtered for first；U
Sunk part can be used for silt sediment to the U-shaped bottom of type sediment deposition pipe down, prevent silt from being made to fluid level transmitter
Into infringement, the mud valve mainly has two effects：First, the opening and closing by controlling mud valve, can not timing ejecting/collecting exist
A small amount of silt in U-shaped sediment deposition pipe, improve the degree of accuracy of measurement result；Second, when whole device is in not running status
When, by opening mud valve, the underground water surveyed in hole can be discharged, reaches the purpose of unloading, protects liquid level sensor and liquid level
Digital display instrument.
As an improvement, the backfill is up followed successively by loaded filter, soil horizon and arable layer from bottom, the arable layer
Permeable hole is not set on observation well casing, is avoided because rain infiltration impacts to surveying hole underground water level measurement result.
As an improvement, the horizontal tube is not set in loaded filter on the observation well casing of the horizontal tube and loaded filter
Water hole.Avoid when needing from when surveying hole bottom and being poured water, the water in loaded filter passes through the flow in horizontal pipe that is laid in loaded filter
Into observation well casing, water level improves rapidly, it is impossible to the level of ground water in true reflection soil.
As an improvement, the inspection well tube top portion is provided with the plug for preventing that rainwater from falling into, prevent rainwater from being seen to level of ground water
Survey interferes.
As an improvement, the air bleeding valve is cheated in gallery located at survey is laid on, positioned at liquid level sensor and U-shaped sediment deposition pipe
Between, for the air in discharge line, improve the degree of accuracy of measurement.
The beneficial effects of the utility model are：
1st, it is simple in construction, easy to operate, be easily installed implementation, precision instrument is placed on underground and surveyed in the gallery of hole, is easy to tie up
Shield.
2nd, by mud valve, efficiently solve the underground water in observation pipeline after filtering and still carry asking for a small amount of silt
Topic, line clogging is prevented, improve measurement accuracy；Unloaded simultaneously when device is not run, reduce the effect of long-time hydraulic pressure
Influence to measuring instrument.
3rd, it is small to observe well casing floor space, disclosure satisfy that bottom is surveyed and cheat the need that small area irrigation tests observe level of ground water
Want, be also applied for the observation of groundwater levels of universal property.
4th, level of ground water automatic measurement is carried out by liquid level sensor, and data is transmitted to level digital display instrument in time,
Manpower is saved, measurement result is accurately and reliably.
The utility model is described in further detail below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is that the utility model has bottom to survey hole underground water level observation device structural representation.
Fig. 2 be the utility model Observable level of ground water have bottom survey hole mounting structure schematic diagram.
Fig. 3 is that have bottom to survey hole underground water level observation device structural representation in Fig. 2.
In figure, 1- observation well casings, 2- plugs, 3- elbows, 4- horizontal tubes, 5- sleeve pipes, the pre-buried stainless steel tubes of 6-, 7- connections
Valve, 8-U type sediment deposition pipes, 9- mud valves, 10- discharge pipelines, 11- air bleeding valves, 12- fluid level transmitters, 13- level digital display instrument.
Embodiment
In order to deepen, to understanding of the present utility model, the utility model to be made with reference to the accompanying drawings and examples further detailed
Thin explanation.Following examples are only used for clearly illustrating the technical solution of the utility model, and can not be limited with this
The scope of protection of the utility model.
Embodiment 1
As shown in figure 1, one kind have bottom survey hole underground water level observation device, including observation well casing 1, horizontal tube 4, communicating valve 7,
U-shaped sediment deposition pipe 8, discharge pipeline 10 and the fluid level transmitter 12 and level digital display instrument 13 being connected by data wire, inspection well
In the vertical survey hole located at level of ground water to be measured of pipe 1, the observation bottom of well casing 1 is connected by elbow 3 with the one end of horizontal tube 4, water
The flat other end of pipe 4 is connected by communicating valve 7 with U-shaped one end of sediment deposition pipe 8, the U-shaped other end of sediment deposition pipe 8 and level transmitting
Device 12 is connected, and the U-shaped bottom of U-shaped sediment deposition pipe 8 is down-set, and discharge pipeline 10 is located at the U-shaped bottom of U-shaped sediment deposition pipe 8,
The middle part of discharge pipeline 10 is additionally provided with mud valve 9, and observation well casing 1 is provided with multiple densely covered permeable holes, and observation well casing 1 is externally provided with parcel
The filter screen being covered on permeable hole.
U-shaped sediment deposition pipe 8 close to fluid level transmitter 12 is provided with air bleeding valve 11.
It is plum blossom type hole that the permeable hole of observation well casing 1, which is only distributed in middle part and bottom, permeable hole, is covered in plum blossom type hole
Filter screen be nylon wire, filter screen has layer 2-3.
The top of observation well casing 1 is provided with plug 2.
In use, this underground water level observation device will be assembled according to Fig. 1, the device is then embedded to level of ground water to be measured
Survey in hole, device by the U-shaped sediment deposition pipe 8 of the present apparatus and downstream is outer located at hole is surveyed, you can mine water position is surveyed in observation.
Embodiment 2
Referring to Fig. 2 and Fig. 3, the present embodiment has bottom to survey hole for a kind of Observable level of ground water, including surveys hole, observation well casing
1st, plug 2, elbow 3, horizontal tube 4, sleeve pipe 5, stainless steel tube 6, communicating valve 7, U-shaped sediment deposition pipe 8, mud valve 9, discharge pipeline
10th, air bleeding valve 11, fluid level transmitter 12 and level digital display instrument 13.In specific implementation, survey in hole and be provided with for long-term cropping
Backfill, backfill are up followed successively by loaded filter, soil horizon and arable layer from bottom, and it is for manually seeing to survey outside one side walls of hole
The survey hole gallery of survey, vertical being located at of observation well casing are surveyed in the backfill in hole, and observation well casing 1 upper end exposes survey and cheats ground about
0.1m, lower end are extending vertically into survey hole loaded filter and underlayer soil intersection；Stainless steel tube 6 is embedded in the wall of survey hole, is led to
The horizontal tube 4 being laid in loaded filter and elbow 3 is crossed to be connected with observation well casing 1 end；It is laid on the level surveyed in the loaded filter of hole
The one end of pipe 4 is connected with observation well casing 1 by elbow, and the other end passes through sleeve pipe connection with stainless steel tube 6；It is laid in the gallery of survey hole
Communicating valve, air bleeding valve and fluid level transmitter are sequentially provided with horizontal tube 4；Communicating valve 7 is left by elbow 3 and U-shaped sediment deposition pipe 8
End is connected, and the U-shaped right-hand member of sediment deposition pipe 8 also connects an elbow 3, and the horizontal segment of the elbow 3 of the U-shaped right-hand member of sediment deposition pipe 8 connects
Fluid level transmitter 12 is connect, the air bleeding valve 11 of a upward opening is connected on the pipeline between elbow 3 and fluid level transmitter 12, it is U-shaped
The bottom low spot of sediment deposition pipe 8 is provided with discharge pipeline 10, and the middle part of discharge pipeline 10 is provided with mud valve 9；Fluid level transmitter 12 passes through circuit
It is connected to level digital display instrument 13.
Referring to Fig. 2 and Fig. 3, the material of plug 2 is plastics, diameter about 20mm, plays sealing process, prevents rainwater to level of ground water
Observation interferes.
Referring to Fig. 2 and Fig. 3, the property that observation well casing 1 cheats backfill according to surveying is divided into two different disposal sections：Embedment is surveyed
The type hole processing of brill plum blossom is carried out to the inspection well tube wall in soil horizon more than loaded filter below the arable layer of hole, and with 2~3 layers
Nylon wire pipeline section is wound it is closely knit, nylon wire to by plum blossom type hole enter pipe shaft underground water carry out first filtering；To burying
Do not make drilling processing to inspection well pipeline section more than arable layer surveying below hole earth's surface, avoid because rain infiltration cheats underground water to surveying
Position measurement result impacts.
Referring to Fig. 2 and Fig. 3, do not make drilling processing to being laid on the observation well casing 1 surveyed in the loaded filter of hole and horizontal tube 4, keep away
Exempt from when needing to be poured water from survey hole bottom, the reclaimed water of loaded filter is flowed to by being laid on the horizontal tube 4 surveyed in the loaded filter of hole
Observe in well casing, water level improves rapidly.
Referring to Fig. 2 and Fig. 3, the horizontal tube 4 surveyed in the loaded filter of hole is laid on the stainless steel tube 6 being embedded in wall by covering
Screw thread in pipe 5, which coordinates, to be connected.Ensure connection sealing effectiveness, prevent seepage in horizontal tube 4, influence measurement result.
Referring to Fig. 2 and Fig. 3, coupling cock 7 is connected with air bleeding valve 11 by the elbow 3 of left and right two into U shape, in elbow 3
Precipitation silt water pipe 8 is drawn vertically in joint.
Referring to Fig. 2 and Fig. 3, communicating valve 7 is located to be laid on and surveyed on the horizontal tube 4 in the gallery of hole, positioned at the wall for surveying hole gallery
On the left of wall and U shape between elbow 3, for the measurement system in the observation well casing 1 and gallery in UNICOM's survey hole, key is played
Property restraining effect.
Referring to Fig. 2 and Fig. 3, air bleeding valve 11 is located to be laid on and surveyed on the horizontal tube 4 in the gallery of hole, positioned at liquid level sensor 12
On the right side of U shape between elbow 3, for the air in discharge line, the degree of accuracy of measurement is improved.
Referring to Fig. 2 and Fig. 3, U-shaped sediment deposition pipe 8 is VERTICAL TUBE, for precipitating after nylon net filter in underground water still
The a small amount of silt contained.
Referring to Fig. 2 and Fig. 3, mud valve 9 is located at the U-shaped lower end of sediment deposition pipe 8, and mud valve 9 mainly has two effects：When
By controlling the opening and closing of mud valve 9, can a small amount of silt of the not timing ejecting/collecting in U-shaped sediment deposition pipe 8, improve measurement
As a result the degree of accuracy；Second, when whole device is in not running status, by opening mud valve 9, can discharge in survey hole
Underground water, reach the purpose of unloading, protect liquid level sensor 12 and level digital display instrument 13.
Referring to Fig. 2 and Fig. 3, discharge pipeline 10 is VERTICAL TUBE, is connected with mud valve 9.
Referring to Fig. 2 and Fig. 3, liquid level sensor 12 is connected with level digital display instrument 13 by circuit, and measurement result can be timely
Transmit to level digital display instrument 13, facilitate direct surveillance and data processing.
Workflow of the present utility model is as follows：
After once being poured water there is bottom to survey hole, survey hole level of ground water and rise, the underground water containing silt passes through 2~3
The observation pipeline section 1 for being drilled with plum blossom type hole is penetrated into after the filtration of layer nylon cloth.When starting to pour water, current are larger, open connection
Valve 7 and air bleeding valve 11, mud valve 9 is closed, current are quickly through the bend pipe 3 of left and right two, and after a period of time, underground water infiltrates change
It is slow, clean a small amount of silt is not filtered in underground water and is built up at U-shaped sediment deposition pipe 8, now opens mud valve 9, row
Go out the silt and fraction water of precipitation, and to the water for surveying supplementary irrigation same volume in hole.In certain observation period, level sensing
Device 12 transmits observed result to level digital display instrument 13, facilitates direct surveillance and data processing.In the period without observation
It is interior, communicating valve 7 and mud valve 9 are opened, the underground water surveyed in hole can be discharged, reaches the purpose of unloading.
In use, by accompanying drawing 2 each several part component should be installed successively.After the completion of assembling, pour water and can be had to surveying in hole
Hole observation of groundwater levels is surveyed at bottom.The present apparatus is simple in construction, easy to operate, efficiently solves underground after filtering in observation pipeline
Water still carries the problem of a small amount of silt, prevents line clogging, improves measurement accuracy, while it is small to observe well casing floor space, energy
Enough needs for meeting to have bottom to survey hole small area irrigation tests observation level of ground water, save manpower, experimental result is accurately and reliably.
The survey hole of survey hole observation well casing or fixed qty that the scope of protection of the utility model is not limited to fixed size is surveyed
It is fixed, meet more demands by changing corresponding parameter can.Obviously, those skilled in the art can be new to this practicality
Type carries out the change of some physical dimensions and number of components without departing from the scope of the utility model and spirit.If these change
Dynamic to belong in the range of the requirement of utility model right and its equivalent technologies, then the intention of utility model also exists comprising these changes
It is interior.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Claims (9)
1. one kind has bottom to survey hole underground water level observation device, it is characterised in that：Including observation well casing, horizontal tube, communicating valve, U-shaped
Sediment deposition pipe, discharge pipeline and the fluid level transmitter and level digital display instrument being connected by data wire, the observation well casing are vertical
Located at level of ground water to be measured survey hole in, inspection well bottom of the tube is connected by elbow with horizontal tube one end, the horizontal tube other end
It is connected by communicating valve with U-shaped sediment deposition pipe one end, the U-shaped sediment deposition pipe other end is connected with fluid level transmitter, U-shaped
The U-shaped bottom of sediment deposition pipe is down-set, and discharge pipeline is located at the U-shaped bottom of U-shaped sediment deposition pipe, is gone back in the middle part of the discharge pipeline
Provided with mud valve, the observation well casing is provided with multiple densely covered permeable holes, and the observation well casing is externally provided with parcel and is covered in
Filter screen on water hole.
2. one kind has bottom to survey hole underground water level observation device according to claim 1, it is characterised in that：The U-shaped silt sinks
Shallow lake pipe is provided with air bleeding valve.
3. one kind has bottom to survey hole underground water level observation device according to claim 1, it is characterised in that：The observation well casing
It is plum blossom type hole that permeable hole, which is only distributed in middle part and bottom, permeable hole, and the filter screen being covered in plum blossom type hole is nylon wire.
4. one kind has bottom to survey hole underground water level observation device according to claim 3, it is characterised in that：The inspection well tube top
Portion is provided with plug, and the filter screen being covered in plum blossom type hole that wraps up has layer 2-3.
5. a kind of Observable level of ground water has bottom to survey hole, it is characterised in that：Including surveying hole, observation well casing, horizontal tube, connection
Valve, U-shaped sediment deposition pipe, discharge pipeline and the fluid level transmitter and level digital display instrument being connected by data wire, it is described to survey in hole
Provided with the backfill for long-term cropping, survey outside one side walls of hole as the survey of artificial observation hole gallery, the observation well casing
In the vertical backfill cheated located at survey, inspection well bottom of the tube is connected by elbow with horizontal tube one end, and the wall of gallery is cheated by surveying
The pre-buried stainless steel tube being connected with horizontal tube is provided with wall, the U-shaped bottom of the U-shaped sediment deposition pipe is directed downwardly located at survey hole corridor
In road, U-shaped sediment deposition pipe one end is connected by communicating valve with the pre-buried stainless steel tube being embedded in advance in wall, and U-shaped silt sinks
The shallow lake pipe other end is connected with fluid level transmitter, and discharge pipeline is located at the U-shaped bottom of U-shaped sediment deposition pipe, is gone back in the middle part of the discharge pipeline
Provided with mud valve；The observation well casing is provided with multiple densely covered permeable holes, and the observation well casing is externally provided with parcel and is covered in
Filter screen on water hole.
6. a kind of Observable level of ground water as claimed in claim 5 has bottom to survey hole, it is characterised in that：The backfill is from bottom
Loaded filter, soil horizon and arable layer are up followed successively by, permeable hole is not set on the observation well casing of the arable layer.
7. a kind of Observable level of ground water as claimed in claim 6 has bottom to survey hole, it is characterised in that：The horizontal tube is located at anti-
In filtering layer, permeable hole is not set on the observation well casing of the horizontal tube and loaded filter.
8. a kind of Observable level of ground water as claimed in claim 5 has bottom to survey hole, it is characterised in that：The inspection well tube top portion
Provided with the plug for preventing rainwater from falling into.
9. a kind of Observable level of ground water as claimed in claim 5 has bottom to survey hole, it is characterised in that：The U-shaped sediment deposition
Pipe is provided with air bleeding valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720425550.7U CN206905841U (en) | 2017-04-21 | 2017-04-21 | Have bottom survey hole underground water level observation device and Observable level of ground water have bottom survey hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720425550.7U CN206905841U (en) | 2017-04-21 | 2017-04-21 | Have bottom survey hole underground water level observation device and Observable level of ground water have bottom survey hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206905841U true CN206905841U (en) | 2018-01-19 |
Family
ID=61290871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720425550.7U Expired - Fee Related CN206905841U (en) | 2017-04-21 | 2017-04-21 | Have bottom survey hole underground water level observation device and Observable level of ground water have bottom survey hole |
Country Status (1)
| Country | Link |
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| CN (1) | CN206905841U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490140A (en) * | 2018-06-04 | 2018-09-04 | 中国农业科学院农田灌溉研究所 | A kind of closed drainage testing of materials survey hole that the row of filling is dual-purpose |
| CN114293578A (en) * | 2021-12-31 | 2022-04-08 | 广西建工第五建筑工程集团有限公司 | Basement drainage and water level monitoring system and construction method thereof |
-
2017
- 2017-04-21 CN CN201720425550.7U patent/CN206905841U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490140A (en) * | 2018-06-04 | 2018-09-04 | 中国农业科学院农田灌溉研究所 | A kind of closed drainage testing of materials survey hole that the row of filling is dual-purpose |
| CN114293578A (en) * | 2021-12-31 | 2022-04-08 | 广西建工第五建筑工程集团有限公司 | Basement drainage and water level monitoring system and construction method thereof |
| CN114293578B (en) * | 2021-12-31 | 2023-10-20 | 广西建工第五建筑工程集团有限公司 | System for monitoring drainage and water level of basement and construction method thereof |
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Granted publication date: 20180119 Termination date: 20210421 |