CN201955059U - Detecting device of soil body fissure depth - Google Patents
Detecting device of soil body fissure depth Download PDFInfo
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- CN201955059U CN201955059U CN2011200478918U CN201120047891U CN201955059U CN 201955059 U CN201955059 U CN 201955059U CN 2011200478918 U CN2011200478918 U CN 2011200478918U CN 201120047891 U CN201120047891 U CN 201120047891U CN 201955059 U CN201955059 U CN 201955059U
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- soil body
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- soil
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Abstract
The utility model discloses a detecting device of soil body fissure depth, comprising a conductivity apparatus and a plurality of groups of paired electrodes, wherein every pair of electrodes is identical in shape and size, the paired electrodes are respectively buried in soil bodies of different layers and respectively connected with an input end of the conductivity apparatus. The detecting device does not damage the internal structure of the soil body, and has more precise detection result.
Description
Technical field
The utility model belongs to Geotechnical Engineering parameter detection field, the particularly sniffer of the soil mass crack degree of depth.
Background technology
The Quantitative study in inside soil body crack, in research generally is in early days to adopt the method for resolving, adopt engineering mechanics (as theory of elasticity, fracturing mechanics etc.) to solve distribution, the degree of depth, aperture and the ductility in swelled ground crack, and the intensity of crack and surrounding soil thereof and deformation characteristic.But the developmental state in inside soil body crack and the growth of external crack are not one to one, and analytical method must comprise many supposition and simplification, and result's precision also is difficult to checking.
In addition, adopt the method for the broken soil body research soil mass crack degree of depth to destroy the inside soil body structure, the soil body is in case fragmentation can't be carried out follow-up test.
Therefore, the design people proposes a kind of detection method of novelty at the defective of prior art, and develops this sniffer based on this.
The utility model content
Technical problem to be solved in the utility model is at defective in the aforementioned background art and deficiency, and a kind of sniffer of the soil mass crack degree of depth is provided, and it can not destroy the inner structure of the soil body, and the result of detection accuracy is higher.
The utility model is for solving above technical matters, and the technical scheme that is adopted is:
A kind of sniffer of the soil mass crack degree of depth comprises conductivity meter and some compositions to electrode, and wherein, the shape of described every pair of electrode, size are all consistent, and each paired electrode is embedded in respectively in the soil body of different layers, and connects the input end of conductivity meter respectively.
After adopting such scheme, the utility model is by being embedded in paired electrode layering in the soil body, and pouring water after the boring between paired electrode, and measure the soil body in difference resistivity constantly in soil after irrigation, set up the curve of resistivity changes with depth, calculate the degree of depth of soil mass crack according to curvilinear motion.The utlity model has following beneficial effect:
(1) sniffer of the present utility model is cheap, and detection process realizes that easily operability is more intense;
When (2) utilizing sniffer of the present utility model to carry out parameter detection, can not destroy the inner structure of the soil body, help carrying out follow-up test, can carry out long test observation, have applicability widely sample;
(3) principle of the present utility model is to utilize the electric conductivity value and the variation thereof of the soil body, and passes through the curve of the electric conductivity value of foundation with soil body change in depth, calculates the degree of depth that obtains the inside soil body crack, and is more simple and efficient than existing mode, has incomparable superiority;
(4) the utility model can be by adopting the higher conductivity meter of precision, if the data processing that records is accurate, the curve of foundation is fit to, and promptly can record the soil mass crack degree of depth more accurately.
Description of drawings
Fig. 1 is based on the process flow diagram of the detection method that the utility model adopts;
Fig. 2 is a structural representation of the present utility model;
Fig. 3 is based on the resulting soil mass crack depth map of the utility model.
Embodiment
Below with reference to accompanying drawing structure of the present utility model and principle of work are elaborated.
The utility model provides a kind of sniffer that is used for the soil mass crack degree of depth, as shown in Figure 2, comprise conductivity meter 1 and some paired electrodes 2, wherein, each paired electrode 2 is embedded in respectively in the soil body of different layers, and connect the input end of conductivity meter 1 respectively, and the electric conductivity value that utilizes conductivity meter 1 to measure between every pair of paired electrode 2, thus the crack degree of depth of the soil body calculated according to the variation of soil after irrigation electric conductivity value; Wherein, conductivity meter 1 can adopt multirange, high-precision model, and has inner calibration function, thereby can carry out internal calibration according to the difformity and the size of paired electrode 2; Electrode 2 then can be made into difformity and size according to actual conditions in pairs, as long as it is consistent to satisfy size, the shape of every pair of electrode 2.
As shown in Figure 1, when using the utility model, needed step is:
(1) the paired electrode of layered arrangement in the soil body to be measured;
Specifically, cooperate shown in Figure 3ly, the soil body to be measured is carried out layering, and bury paired electrode respectively underground at each layer, described two electrodes are wired to the face of land respectively, and are connected to same conductivity meter, in order to measure the electric conductivity value between this paired electrode;
(2) utilize conductivity meter to measure the electric conductivity value between paired electrode in every layer soil body respectively;
When not having the crack in the soil body, the electric conductivity value that electric current is propagated in soil is very big, and this moment, the resistivity of the soil body was smaller, can equivalence be two small resistor series connection; And when the cranny development in the soil body,, causing the resistivity of the soil body to increase because the air that is full of in the crack can not be propagated electric current, can equivalence be the resistance that resistance is very big of connecting again between two small resistors this moment.
(3) in each layer soil body, pour water after the boring between paired electrode, and the electric conductivity value between use conductivity meter periodic measurement paired electrode;
When pouring water in the soil body, the moisture of the eminence soil body is past lower seepage flow in crack, deadweight effect lower edge, at the initial stage of pouring water, by the conductive capability of water, make the conductivity of the soil body have certain rising, and along with time lapse, moisture can be along the crack downward seepage flow, the conductivity of the soil body can descend once more; Therefore, if soil mass crack is grown, then the variation meeting of soil body conductivity is very big; If the trickle growth of soil mass crack, then the conductivity variations of the soil body can be very not big; If the basic agensis of soil mass crack, then the electric conductivity value of the soil body does not change substantially; Like this, can change at the electric conductivity value of soil after irrigation according to the soil body, push away the growth degree of depth of soil mass crack.
(4) according to every pair of interelectrode electric conductivity value of the aforementioned soil after irrigation that records, draw different soil body electric conductivity values constantly with the curve map of change in depth, obtain the degree of depth in crack according to the situation of change of electric conductivity value, the electric conductivity value vary within wide limits, grow in the crack of this degree of depth, and the electric conductivity value amplitude of variation is little, and then the cranny development of this degree of depth is trickle;
Cooperating shown in Figure 3ly, is to pour water the electric conductivity value of the back soil body in the present embodiment with the curve map of change in depth, and in the process of pouring water, the electric conductivity value at 10-20cm place increases fast, dissipates also soon as can be known, and the crack height growth at this degree of depth place is described; Though and the soil body electric conductivity value at the 30-40cm place has certain increase, over time, electric conductivity value to reduce amplitude limited, can think because due to water percentage changed in the soil body, the soil mass crack of this degree of depth had slight growth; And in the depth range below 40cm, the electric conductivity value of the soil body remains unchanged substantially, illustrates that the soil body of this degree of depth does not have cranny development substantially.
In sum, the sniffer of a kind of soil mass crack degree of depth of the utility model, focus on the soil body is carried out layering, and bury paired electrode underground at every layer, between every pair of paired electrode, hole and pour water, by measuring of the variation of this paired electrode, judge whether this place has crack and crack degree, thereby obtain the degree of depth of soil mass crack at the soil after irrigation electric conductivity value.It has more intense operability, and is cheap, and can not destroy the inner structure of the soil body, and applicability is extensive.
Above embodiment only is the utility model illustration, can not limit protection domain of the present utility model with this, and is every according to the technological thought that the utility model proposes, and any change of being done on the technical scheme basis all falls within the utility model protection domain.
Claims (1)
1. the sniffer of a soil mass crack degree of depth, it is characterized in that: comprise conductivity meter and some compositions to electrode, wherein, the shape of described every pair of electrode, size are all consistent, and each paired electrode is embedded in respectively in the soil body of different layers, and connects the input end of conductivity meter respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200478918U CN201955059U (en) | 2011-02-25 | 2011-02-25 | Detecting device of soil body fissure depth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200478918U CN201955059U (en) | 2011-02-25 | 2011-02-25 | Detecting device of soil body fissure depth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201955059U true CN201955059U (en) | 2011-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200478918U Expired - Fee Related CN201955059U (en) | 2011-02-25 | 2011-02-25 | Detecting device of soil body fissure depth |
Country Status (1)
| Country | Link |
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| CN (1) | CN201955059U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087093A (en) * | 2011-02-25 | 2011-06-08 | 河海大学 | Method for detecting soil mass cracking depth and detection device |
-
2011
- 2011-02-25 CN CN2011200478918U patent/CN201955059U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087093A (en) * | 2011-02-25 | 2011-06-08 | 河海大学 | Method for detecting soil mass cracking depth and detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20130225 |