CN218240441U - Device for detecting leakage hidden danger of foundation pit support structure - Google Patents
Device for detecting leakage hidden danger of foundation pit support structure Download PDFInfo
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- CN218240441U CN218240441U CN202222143394.9U CN202222143394U CN218240441U CN 218240441 U CN218240441 U CN 218240441U CN 202222143394 U CN202222143394 U CN 202222143394U CN 218240441 U CN218240441 U CN 218240441U
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Abstract
The application discloses detect device of foundation ditch envelope seepage hidden danger, include: the special protective pipes are arranged on the periphery of the ground wall structure; an electric field creation device that creates a stable electric field in the foundation pit, the electric field creation device comprising: a first feeding electrode; a second power supply electrode; a power supply, the power supply comprising: a power output connected to the first power supply electrode and the second power supply electrode; a potentiometric measuring device, comprising: a potential gradient observation control analyzer; one end of the potential gradient measurement measuring line is connected with the potential gradient observation control analyzer, and the other end of the potential gradient measurement measuring line is arranged at the bottom of the special protective tube; and the potential measuring sensors are arranged in the special protection pipe in series through the potential gradient measuring line.
Description
Technical Field
The application relates to a monitoring field of foundation pit retaining structure, especially relates to retaining structure's seepage hidden danger detection area.
Background
In the process of foundation pit enclosure construction, due to the influence of various uncontrollable factors, the enclosure structure after construction may have structural abnormalities such as mud inclusion, cavities, bifurcations and the like. In the process of excavation of the foundation pit, the abnormalities become main hidden dangers of leakage, if the abnormalities are not found out and repaired in advance, serious leakage can be formed in the process of excavation of the foundation pit, and huge loss is caused. Therefore, it is important to detect the structural abnormalities in advance before excavation of the foundation pit, and the structural abnormalities are often difficult to find due to the fact that the foundation pit support structure is deeply buried in the soil. In order to find out the abnormal condition of the structure, a single-hole potential gradient measurement detection means for detecting the quality of the front wall protection structure of foundation pit excavation is available at present.
However, the existing detection means for measuring the single-hole potential gradient for detecting the quality of the front enclosure structure for excavation of the foundation pit can only detect the potential gradient in a single hole and only approximately detect the leakage of the ground wall, so that the detection efficiency is low, the detected data is single, and the detection pertinence is insufficient, so that it is difficult to clearly judge whether the hidden danger exists the leakage risk and the classification of the leakage.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a device for detecting leakage hidden danger of a foundation pit support structure, solves the problem that in the prior art, single-hole potential gradient measurement can only roughly detect the leakage of a ground wall, and realizes more accurate judgment of the leakage hidden danger and classification of the leakage.
The application provides a detect device of foundation ditch envelope seepage hidden danger, include:
the special protective pipes are arranged in corresponding drill holes on the inner side of the foundation pit;
an electric field creation device that creates a stable electric field in a foundation pit, the electric field creation device comprising:
the first power supply electrode is arranged on the soil body outside the foundation pit;
the second power supply electrode is arranged on a soil body on the inner side of the foundation pit;
the power supply is electrically connected with the first power supply electrode and the second power supply electrode;
a potentiometric measuring device, comprising:
a potential gradient observation control analyzer;
one end of the potential gradient measurement measuring line is connected with the potential gradient observation control analyzer, and the other end of the potential gradient measurement measuring line is arranged in the special protective tube;
and the potential measuring sensors are arranged in the special protection tube in series through the potential gradient measuring line.
Preferably, the specially-made protection pipe is arranged close to a target ground wall gap of the ground wall structure.
Preferably, in the device for detecting the potential leakage hazard of the foundation pit support structure, the distance between the special protective pipe and the wall gap of the target ground wall is 0.5-1 m.
Preferably, the special protective pipe is 20 to 30 meters in length.
Preferably, the power supply has a positive electrode and a negative electrode.
Preferably, the positive electrode of the device for detecting the potential leakage hazard of the foundation pit support structure is connected with the first power supply electrode through a wire, and the negative electrode of the device is connected with the second power supply electrode through a wire.
Preferably, the positive electrode of the device for detecting the potential leakage hazard of the foundation pit support structure is connected with the second power supply electrode through a wire, and the negative electrode of the device is connected with the first power supply electrode through a wire.
Preferably, the potential measuring sensors are five in the device for detecting the potential leakage hazard of the foundation pit support structure.
Preferably, the device for detecting the potential leakage hazard of the foundation pit support structure is characterized in that the potential measurement sensors are arranged at intervals.
Preferably, the device for detecting the potential leakage hazard of the foundation pit support structure is characterized in that the potential measuring sensors are arranged at equal intervals.
The technical scheme provided in the embodiment of the application at least has the following technical effects or advantages:
because the specially-made protective pipes and the potential measuring sensors are arranged, the problem that only the ground wall leakage can be roughly detected in the prior art is effectively solved, the detection efficiency is improved, the reliability of detection of the ground wall leakage hidden danger is improved, the severity of the leakage hidden danger can be judged, the risk of leakage is reduced, and the wall body cannot be damaged.
Drawings
Fig. 1 is the utility model discloses preferred embodiment's detection foundation ditch enclosure seepage device's schematic diagram.
Reference numerals:
a ground wall structure-10;
target ground wall seam-11
Foundation pit soil-20;
foundation pit outer soil-21;
measuring a soil body-22 in the foundation pit;
drilling-30;
a special protective tube-40;
electric field set-up means-50;
a first power supply electrode-51;
a second power supply electrode-52;
a power supply-53;
potential measuring device-60;
potential gradient observation control analyzer-61;
potential gradient measurement line-62;
a potentiometric sensor-63;
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Further, it is noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are used in the description of the invention in a generic sense, e.g., connected as either a fixed connection or a removable connection or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements, and those skilled in the art can understand their specific meaning in this application according to the specific situation.
Preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Fig. 1 is this according to the utility model discloses preferred embodiment's detection foundation ditch enclosure seepage device's schematic diagram. The foundation pit soil 20 is divided into an outer foundation pit soil 21 and an inner foundation pit soil 22 by the ground wall structure 10, and at least two (four shown in the figure) target ground wall seams 11 are formed in the ground wall structure 10. The number of the target wall seams 11 is determined according to the construction and design data of the wall. And drilling at the position with the vertical distance of 0.5-1 meter of the target ground wall seam 11, wherein the drilling depth can be adjusted according to the field conditions of the target ground wall seam 11 and the like. Preferably, at least two (four shown) bores 30 are provided, the bores 30 having a depth of 20 to 30 meters, the bores 30 being sized to receive a specially made shroud 40. The specially made protective tube 40 can ensure the current to flow in. The position of the special guard pipe 40 approximately corresponds to the drill hole 30, and the distance between the special guard pipe and the target wall seam is 0.5 m to 1 m. The length of the tailored guard tube 40 corresponds approximately to the depth of the borehole 30, being 20 to 30 meters.
An electric field creating device 50 is provided in the foundation pit soil 20, and the electric field creating device 50 can create a stable electric field inside and outside the foundation pit. The electric field establishing means 50 comprises: the first power supply electrode 51, the first power supply electrode 51 is set up on the outer soil body 21 of foundation ditch; a second power supply electrode 52 arranged on the soil body on the inner side 22 of the foundation pit; and a power supply 53 electrically connected to the first power supply electrode 51 and the second power supply electrode 52. Preferably, the power supply 53 has a positive electrode and a negative electrode, and the positive electrode and the negative electrode are connected to the first power supply electrode 51 or the second power supply electrode 52 by a wire, respectively. The power supply 53, the first power supply electrode 51 and the second power supply electrode 52 together form a potential difference and establish a stable electric field. The potential measuring device 60 can determine the accurate depth of the ground wall leakage hidden danger 12 of the target ground wall gap 11 by observing the potential gradient curve form and the magnitude of the potential gradient curve at the same depth position.
The potential measuring device 60 includes: the potential gradient observation control analyzer 61 is used for displaying the form and the value of a potential gradient curve by the potential gradient observation control analyzer 61; at least two (four are shown in the figure) potential gradient measuring wires 62, one end of each potential gradient measuring wire 62 is connected with the potential gradient observation control analyzer 61, and the other end is arranged in the special protective tube 40. In the special guard tube 40, at least two (four are shown in the figure) potentiometric sensors 63 are connected in series on the potentiometric gradient measurement line 62. The number of the electric potential measuring sensors 63 can be set according to the depth of the special-made protective tube 40, and preferably, five electric potential measuring sensors 63 are arranged as shown in the figure, and the five electric potential measuring sensors 63 are arranged at a certain distance from each other and are connected in series in the special-made protective tube 40 through the electric potential gradient measuring line 62. More preferably, five potentiometric sensors 62 are equally spaced in the tailored sheath 40.
When the potential gradient measuring instrument is used, potential gradient measurement is simultaneously carried out on the target ground wall seam 11 from bottom to top at an interval of 0.5 meter through each potential sensor 63 arranged in each special protective tube 40, the potential gradient measurement is stored and recorded in the potential gradient observation control analyzer 61, the depth position of the hidden leakage danger is judged by comprehensively analyzing the forms and the values of potential gradient curves of the positions of different depths in the same special protective tube 40, and the plane position of the hidden leakage danger of the ground wall is determined according to the plane position of the special protective tube 40. The severity of the potential wall leakage hazard is determined by comparing and analyzing the forms and values of the potential gradient curves at the same depth positions in different special protective tubes 40.
The utility model provides a detect device of foundation ditch retaining structure seepage hidden danger, its detection efficiency that can promote the diaphragm wall seepage, improve the reliability of the detection of diaphragm wall seepage hidden danger to and judge the severity of seepage hidden danger, reduce the risk that the seepage takes place, and can not cause the destruction to the wall body.
The preferred embodiments and examples of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the embodiments and examples described above, and various changes can be made within the knowledge of those skilled in the art without departing from the concept of the present application.
Claims (5)
1. The utility model provides a detect device of foundation ditch envelope seepage hidden danger which characterized in that includes:
the special protective pipes are arranged in corresponding drilled holes on the inner side of the foundation pit;
an electric field creation device that creates a stable electric field in the foundation pit, the electric field creation device comprising:
the first power supply electrode is arranged on a soil body outside the foundation pit;
the second power supply electrode is arranged on the soil body on the inner side of the foundation pit;
the power supply is electrically connected with the first power supply electrode and the second power supply electrode;
a potentiometric measuring device, comprising:
a potential gradient observation control analyzer;
one end of the potential gradient measurement measuring line is connected with the potential gradient observation control analyzer, and the other end of the potential gradient measurement measuring line is arranged in the special protective tube;
and the potential measuring sensors are arranged in the special protection pipe in series through the potential gradient measuring line.
2. The device for detecting the potential leakage hazard of the foundation pit enclosure structure as claimed in claim 1, wherein the specially-made protection pipe is arranged close to a target ground wall gap of the ground wall structure.
3. The device for detecting the potential leakage hazard of the foundation pit enclosure structure as claimed in claim 2, wherein the distance between the special protection pipe and the target ground wall gap is 0.5-1 m.
4. The device for detecting the potential leakage hazard of the foundation pit enclosure structure as claimed in claim 1, wherein the length of the special protection pipe is 20-30 m.
5. The device for detecting the potential leakage hazard of the foundation pit enclosure structure as claimed in claim 1, wherein the power supply has a positive electrode and a negative electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222143394.9U CN218240441U (en) | 2022-08-15 | 2022-08-15 | Device for detecting leakage hidden danger of foundation pit support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222143394.9U CN218240441U (en) | 2022-08-15 | 2022-08-15 | Device for detecting leakage hidden danger of foundation pit support structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218240441U true CN218240441U (en) | 2023-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222143394.9U Active CN218240441U (en) | 2022-08-15 | 2022-08-15 | Device for detecting leakage hidden danger of foundation pit support structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218240441U (en) |
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2022
- 2022-08-15 CN CN202222143394.9U patent/CN218240441U/en active Active
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