CN202281742U - System for measuring osmotic coefficient of superficial layer sandy soil - Google Patents
System for measuring osmotic coefficient of superficial layer sandy soil Download PDFInfo
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- CN202281742U CN202281742U CN2011204246036U CN201120424603U CN202281742U CN 202281742 U CN202281742 U CN 202281742U CN 2011204246036 U CN2011204246036 U CN 2011204246036U CN 201120424603 U CN201120424603 U CN 201120424603U CN 202281742 U CN202281742 U CN 202281742U
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Abstract
The utility model discloses a system for measuring an osmotic coefficient of superficial layer sandy soil. The system for measuring the osmotic coefficient of the superficial layer sandy soil comprises a vertical pipe, a sensor, a central controller, a communication module and a data processing module, wherein the vertical pipe is arranged in a sandy soil layer to be measured, the sensor is arranged in the vertical pipe, a data variation value in the vertical pipe is sensed under the control of the central controller and is transmitted to the data processing module by the communication module; and the osmotic coefficient of the superficial layer sandy soil is calculated by the data processing module according to the sensed data of the sensor. The system for measuring the osmotic coefficient of the superficial layer sandy soil, provided by the utility model, can be used for obtain the osmotic coefficient of the superficial layer sandy soil under a natural condition without drilling holes, and has the advantages of convenience for carry and operation and low use cost.
Description
Technical field
The utility model belongs to the Geotechnical Engineering technical field, particularly a kind of sniffer of sandy soil infiltration coefficient.
Background technology
The quantitative test of sandy soil infiltration coefficient is related to problems such as the precipitation infiltration and the recharge of ground water; Especially in the arid area; The infiltration coefficient measurement of sandy soil is significant, and the method for existing many mensuration sandy soil infiltration coefficients mainly comprises lab analysis method and field measuring method at present.
The lab analysis method need be taken a sample from the field, tries to achieve open-air undisturbed soil infiltration coefficient in indoor application darcy theorem etc., and this method is bigger to the disturbance of soil, has destroyed the natural structure of the soil body, and can't measure in the open air.
The field test method mainly is to utilize the method for drawing water and setting-out to try to achieve the infiltration coefficient in water-bearing zone; Described taking out/setting-out mainly contain constant flow take out/setting-out, fall deeply and take out/setting-out etc. surely; Wherein, Constant flow takes out/and setting-out is to extract the water body (also being that constant flow injects water body in well logging) in the well logging with firm discharge, and the water movement between making the water-bearing zone and logging well reaches stable state, according to the flow of stable situation and fall the infiltration coefficient that dark relation is obtained the water-bearing zone; And fall deeply surely take out/setting-out be through take out/setting-out remains unchanged the drawdown in the well logging, according to flow with the infiltration coefficient that dark relation is tried to achieve the water-bearing zone falls.But loaded down with trivial details, the complicated operation of this kind method equipment needs to consume great amount of manpower and material resources and financial resources, and implementation cost is higher.
Foreign study goes out a kind of impulse test method, and it is a kind of field test method, during enforcement; Mainly be that sleeve pipe is set in well logging, the inwall of well logging isolated, and filtrator is set at the ad-hoc location of sleeve pipe; Utilize the variation of water level to test the infiltration coefficient in this water-bearing zone, place, yet the water-level fluctuation that this kind method of testing only is suitable for causing is positioned under the situation of upper filter part; If will be used for the screw test, perhaps whole hole all is provided with under the situation of filtrator, and will there be very mistake in the result; In addition, this kind method of testing must cooperate sleeve pipe to realize, thereby has limited its range of application.
Sum up the method for testing of above field trial, all need drilling measuring, take time and effort relatively, have much room for improvement.
Based on above analysis, the design people studies improvement to existing infiltration coefficient proving installation, and this case produces thus.
The utility model content
The utility model technical matters to be solved; Be to defective and deficiency in the aforementioned background art; A kind of shallow-layer sandy soil permeability coefficient measuring system and measuring method are provided, and this method of testing need not to hole and can try to achieve the infiltration coefficient of shallow-layer sandy soil under the native state, and test macro is easy to carry; Easy to operate, and use cost is low.
The utility model is for solving above technical matters, and the technical scheme that is adopted is:
A kind of shallow-layer sandy soil permeability coefficient measuring system; Comprise vertical tube, sensor, central controller, communication module and data processing module; Wherein, vertical tube is located in the sandy soil layer to be measured, and sensor is located in the vertical tube; Data variation value under the control of central controller in the sensing vertical tube, and be sent to data processing module through communication module; Data processing module calculates the infiltration coefficient that obtains the shallow-layer sandy soil according to the sense data of sensor.
Above-mentioned vertical tube is straight tube shape, square or 45 shape.
The sensor is a pressure transducer, and the change value of pressure in the sensing vertical tube is sent to data processing module through communication module.
After adopting such scheme, the utlity model has following characteristics:
(1) the utility model utilizes the vertical tube method to measure the husky gravel bed infiltration coefficient of high osmosis, belongs to field test, the natural characteristic of the soil that can maintain the original state preferably, and measurement result is more accurate;
When (2) utilizing the utility model to carry out parameter detection, operation such as need not hole, easy to operate, measuring period is short, and cost is low, has bigger engineering practical value;
(3) measure AQUIFER HYDRAULIC after traditional field test is holed; Not only cost is high; And the level of can only measuring is to infiltration coefficient; The utility model can be made different angles with vertical tube, measures the infiltration coefficient of different directions, and the infiltration coefficient that is particularly suitable for heterogeneous body, anisotropic sandy soil layer is measured;
(4) the utility model is surveyed water level based on the high sensitivity pressure transducer, has overcome the shortcoming that traditional vertical tube method can't be measured high osmosis medium osmosis coefficient, and measuring accuracy is high, has higher promotional value.
Description of drawings
Fig. 1 is the integrated stand composition of the utility model measuring system;
Fig. 2 is the schematic diagram that adopts the measuring method detection sandy soil layer vertical infiltration coefficient of the utility model;
Fig. 3 adopts the measuring method of the utility model to survey the schematic diagram of sandy soil layer level to infiltration coefficient;
Fig. 4 adopts the measuring method of the utility model to survey the sandy soil layer becomes miter angle direction infiltration coefficient with surface level schematic diagram;
Fig. 5 is the detection process flow diagram of the measuring method of the utility model.
Embodiment
Below will combine accompanying drawing, the technical scheme of the utility model will be elaborated.
As shown in Figure 1; The utility model provides a kind of shallow-layer sandy soil permeability coefficient measuring system, comprises vertical tube, sensor, central controller, communication module and data processing module, wherein; Vertical tube can adopt pvc pipe; According to the infiltration coefficient of need measurement different directions, its shape can be different, and said vertical tube is located in the sandy soil layer to be measured; Sensor is located in the vertical tube; Be used for the SEA LEVEL VARIATION in the sensing vertical tube under the control of central controller, in the present embodiment, can adopt the pressure transducer of high precision and high sensitivity; Its resolution speed is 1 per second; Precision reaches ± and more than the 0.05%FS, it can directly obtain the hydraulic pressure data in the vertical tube, and be sent to data processing module through communication module; Because the parameter that calculation permeability coefficient needs is the water level in the vertical tube; Therefore after data processing module electrical signal conversion that pressure transducer is obtained becomes corresponding hydraulic signal; Utilize the pressure formula to be scaled the water level in the vertical tube this moment, and calculate the infiltration coefficient of sandy soil.
Please refer to shown in Figure 5ly again, be based on the measuring method of the measuring system of the shallow-layer sandy soil infiltration coefficient that the utility model provides, comprise the steps:
(1) according to the direction of the infiltration coefficient of required measurement, select difform vertical tube to insert in the sandy soil layer, the residing degree of depth of this vertical tube is the degree of depth of required measurement infiltration coefficient;
Shown in the conjunction with figs.; When needs are measured vertical infiltration coefficient; Straight tube shape vertical tube (see figure 2) can be selected for use, when needs are measured level to infiltration coefficient, square vertical tube (see figure 3) can be selected for use; When the needs measurement becomes the infiltration coefficient of 45 direction with surface level, can select 45 shape vertical tube (see figure 4) for use.
In general, when sandy soil layer to be measured is more shallow,, improve the measuring accuracy of infiltration coefficient, can directly vertical tube be inserted in the sandy soil layer for preventing to destroy the original structure of sandy soil layer; And when sandy soil layer to be measured is dark, can dig a pitting at the position line to be measured, and then vertical tube is inserted, again that landfill around the vertical tube is solid.
(2) sensor is inserted in the vertical tube, and fills with water in this vertical tube fast, the data variation value of sensor this moment in can the sensing vertical tube, and finally obtain the water level in the vertical tube;
In the present embodiment, but adopts pressure sensor is surveyed the variation in water pressure value in the vertical tube, and according to following formula hydraulic pressure is scaled the water level in vertical tube this moment:
Wherein, h is a height of water level with respect to the horizontal plane, and p is the hydraulic pressure value that records, and ρ is the density of water, and g is an acceleration of gravity.
(3), calculate the infiltration coefficient of shallow-layer sandy soil with the expression formula of aforementioned waterlevel data substitution sandy soil vertical tube test model:
Wherein, K is the infiltration coefficient of sandy soil layer, and L is the length of sandy soil in the vertical tube, h
1, h
2Be respectively t in the vertical tube
1And t
2Moment height of water level value with respect to the horizontal plane.
Need to prove that vertical tube middle water level height with respect to the horizontal plane can be converted according to the placement height of pressure transducer again, formula is following:
h＝H+h
0
Wherein, h is a height of water level with respect to the horizontal plane, and H is the height of water level with respect to pressure transducer, h
0Be pressure transducer height with respect to the horizontal plane.
Above embodiment is merely the technological thought of explanation the utility model; Can not limit the protection domain of the utility model with this; Every technological thought that proposes according to the utility model, any change of on the technical scheme basis, being done all falls within the utility model protection domain.
Claims (3)
1. shallow-layer sandy soil permeability coefficient measuring system; It is characterized in that: comprise vertical tube, sensor, central controller, communication module and data processing module; Wherein, vertical tube is located in the sandy soil layer to be measured, and sensor is located in the vertical tube; Data variation value under the control of central controller in the sensing vertical tube, and be sent to data processing module through communication module; Data processing module calculates the infiltration coefficient that obtains the shallow-layer sandy soil according to the sense data of sensor.
2. shallow-layer sandy soil permeability coefficient measuring system as claimed in claim 1 is characterized in that: said vertical tube is straight tube shape, square or 45 shape.
3. shallow-layer sandy soil permeability coefficient measuring system as claimed in claim 1 is characterized in that: said sensor is a pressure transducer, and the change value of pressure in the sensing vertical tube is sent to data processing module through communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204246036U CN202281742U (en) | 2011-10-31 | 2011-10-31 | System for measuring osmotic coefficient of superficial layer sandy soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204246036U CN202281742U (en) | 2011-10-31 | 2011-10-31 | System for measuring osmotic coefficient of superficial layer sandy soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202281742U true CN202281742U (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204246036U Expired - Fee Related CN202281742U (en) | 2011-10-31 | 2011-10-31 | System for measuring osmotic coefficient of superficial layer sandy soil |
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| Country | Link |
|---|---|
| CN (1) | CN202281742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435540A (en) * | 2011-10-31 | 2012-05-02 | 河海大学 | Measurement system and method for permeability coefficient of shallow-layer sand soil |
-
2011
- 2011-10-31 CN CN2011204246036U patent/CN202281742U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435540A (en) * | 2011-10-31 | 2012-05-02 | 河海大学 | Measurement system and method for permeability coefficient of shallow-layer sand soil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20120620 Termination date: 20141031 |
|
| EXPY | Termination of patent right or utility model |