Device and method for detecting the segregation degree of tailing bubble lightweight soil in situ

Abstract

The present application relates to the technical fields of segregation degree detection, in particular to a device and method for in-situ detection of segregation degree of tailing bubble lightweight soil, which comprises a fixing assembly, a detection assembly, a positive soil pressure cell host and a lateral soil pressure cell host; the positive soil pressure cell host and the lateral soil pressure cell host are electrically connected with the detection assembly; the fixing assembly comprises a sleeve capable of filling tailing bubble lightweight soil inwardly; the detection assembly comprises an adjusting frame which is slidingly connected to the inside of the sleeve; the adjusting frame is internally provided with a positive soil pressure cell, and the adjusting frame is internally provided with a lateral soil pressure cell. The positive soil pressure and the lateral soil pressure of the tailing bubble lightweight soil at different filling positions are obtained through the detection assembly, and the change amplitudes are calculated respectively, so as to evaluate the segregation degree of the tailing bubble lightweight soil. The present application has strong operability, is simple and convenient, can freely adjust the position to be detected according to the field requirements, and has wide application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection, in particular to a device and method for detecting the segregation degree of tailing bubble lightweight soil in situ. BACKGROUND

[0002] Tailing bubble lightweight soil is a new type of lightweight building material containing a large number of closed pores, which is formed by using waste tailings as admixture, fully foaming the foaming agent by the foaming system of the foaming machine, uniformly mixing the foam with tailings and cement slurry, and then pouring in situ or forming by mold through the pumping system of the foaming machine, and naturally curing. It is widely used in roadbed filling. In actual roadbed filling, the method of layered filling is adopted, about one layer per two meters. However, due to gravity, tailing aggregates will slowly sink after tailing bubble lightweight soil is poured, causing segregation and affecting construction quality. Therefore, after filling, it is necessary to evaluate whether the filled layer is segregated to judge the filling effect.

[0003] Chinese invention patent (publication number: CN114859024A) discloses a C60 high-strength self-compacting concrete high-throw segregation test device, and Chinese invention patent (publication number: CN217133169U) discloses a large-drop free-falling pouring concrete anti-segregation performance detection device. The objects of these two patents are to detect the segregation of concrete, which is not applicable to bubble lightweight soil. For example, Chinese invention patent (publication number: CN112014276A) discloses a method and model construction method for detecting the segregation degree of layered filling body, which evaluates the segregation degree by drilling and sampling the filling body and analyzing the average particle size of tailings. In addition, Chinese invention patent (publication number: CN115015110A) provides a foam lightweight soil layered detection device and detection method, which accurately detects whether the foam lightweight soil has layered defects according to the acceleration curve. However, for tailing bubble lightweight soil filling engineering, it is necessary to accurately evaluate the segregation degree of filling in real time on site, so as to timely adjust the proportioning and process of tailing bubble lightweight soil and ensure the construction quality. SUMMARY

[0004] In order to solve the above problems, the present application provides a device and method for detecting the segregation degree of tailing bubble lightweight soil in situ, which can detect the in-situ pouring of tailing bubble lightweight soil and evaluate the segregation of filling.

[0005] The present application achieves the above-mentioned purposes through the following technical solutions.

[0006] The application provides a device for detecting the segregation degree of tailing bubble lightweight soil in situ, which comprises a fixing assembly, a detection assembly, a forward soil pressure cell host and a lateral soil pressure cell host.

[0007] Further, the forward soil pressure cell is arranged in the middle of the inner bottom surface of the adjusting frame, and the lateral soil pressure cell is arranged on the lower section of the inner side surface of the adjusting frame.

[0008] Further, the horizontal surface of the lateral soil pressure cell is arranged above the forward soil pressure cell.

[0009] Further, a groove is arranged on the left and right side surfaces of the adjusting frame, respectively, the lateral soil pressure cell is arranged in the left groove, and the right groove is provided with a groove cover plate; a first signal line is fixedly arranged on the upper left side surface of the adjusting frame and electrically connected with the lateral soil pressure cell, and a second signal line is fixedly arranged on the upper right side surface of the adjusting frame and electrically connected with the forward soil pressure cell.

[0010] Further, a connecting rod is fixedly arranged between the upper portions of the adjusting frames, and a handle is fixedly arranged on the upper end of the connecting rod.

[0011] Further, a sliding groove is arranged on the inner side surface of the sleeve, the adjusting frame is vertically and slidably connected in the sliding groove, a limiting rod is fixedly arranged on the top of the sleeve, and the limiting rod crosses the adjusting frame so that the adjusting frame cannot be separated from the sleeve.

[0012] Further, a lifting ring is fixedly arranged on the upper end of each corner of the sleeve, a communication hole is arranged on each side surface of the sleeve, the side surface of the communication hole is away from the side surface of the sliding groove, and the communication hole is in communication with the interior of the sleeve.

[0013] Further, a limiting screw is arranged on each side surface of the upper portion of the sleeve, one end of the limiting screw extends into the interior of the sleeve to the sliding groove, and the other end of the limiting screw is abutted against the adjusting frame.

[0014] Further, a mounting ear is fixedly arranged on the top side surface of the adjusting frame, and a laser range finder is vertically and fixedly arranged on the mounting ear.

[0015] The application further provides a method for detecting the segregation degree of tailing bubble lightweight soil in situ, which is performed according to the device for detecting the segregation degree of tailing bubble lightweight soil in situ, and the steps are as follows:

[0016] Step one, first by laser range finder on the detection components inserted in the depth of the casing to adjust, so that the detection components between the vertical equidistant distribution, a total of 5 layers, from top to bottom in turn for the first 5 layers, each layer is fixed by limiting screw;

[0017] Step two, the casing is placed vertically in the detection site, the lateral earth pressure cell host and the first signal line connection, and the positive earth pressure cell host and the second signal line connection;

[0018] Step three, filling tailings bubble lightweight soil, tailings bubble lightweight soil through the communication hole into the inside of the casing, until completely filled. At this time by the positive earth pressure cell host to obtain the i layer positive earth pressure cell in the initial filling time t0 positive earth pressure By lateral earth pressure cell host to obtain the i layer lateral earth pressure cell in the initial filling time t0 lateral earth pressure

[0019] Step four, when the tailings bubble lightweight soil initial setting time t, again record the i layer positive earth pressure cell positive earth pressure σ vi,t And the i layer lateral earth pressure cell lateral earth pressure σ hi,t ;

[0020] Step five, calculate the initial filling time t0 and initial setting time t i layer tailings bubble lightweight soil positive earth pressure change amplitude Δ σ,vi And lateral earth pressure change amplitude Δ σ,hi , the calculation formula is as follows:

[0021]

[0022]

[0023] Step six, if the i layer tailings bubble lightweight soil positive earth pressure change amplitude Δ σ,vi And lateral earth pressure change amplitude Δ σ,hi All within 10%, then the filling of tailings bubble lightweight soil does not separate; if the positive earth pressure change amplitude Δ σ,vi And lateral earth pressure change amplitude Δ σ,hi One or both are greater than 10%, then the filling of tailings bubble lightweight soil appears to separate;

[0024] Step seven, after data acquisition is completed, by lifting ring fixed components and detection components pull out, clean, and the detection position is backfilled tailings bubble lightweight soil, complete detection.

[0025] The technical effect of the present application: when in use, by adopting the detection assembly, the positive earth pressure and the lateral earth pressure at different positions in the filled layer are detected, and then the in-situ detection and analysis of the segregation degree of the tailing bubble lightweight soil are carried out, which facilitates the analysis, and facilitates the free adjustment of the point to be detected according to the requirement, has strong applicability, and is convenient for use in the filling of the tailing bubble lightweight soil. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0027] Figure 2 It is a schematic diagram of the overall structure of the present application from another angle;

[0028] Figure 3 It is a schematic diagram of the overall structure of the present application after the fixed assembly is cut in half;

[0029] Figure 4 It is a schematic diagram of the structure of the fixed assembly in the present application;

[0030] Figure 5 It is a schematic diagram of the structure of the fixed assembly in the present application from another angle;

[0031] Figure 6 It is a schematic diagram of the structure of the detection assembly in the present application;

[0032] Figure 7 It is a schematic diagram of the structure of the detection assembly in the present application from another angle;

[0033] Figure 8 It is a schematic diagram of the structure of the detection assembly in the present application after the local part A is enlarged;

[0034] Figure 9 It is a schematic diagram of the structure of the detection assembly in the present application after the local part B is enlarged;

[0035] In the figure: 1, fixed assembly; 101, sleeve; 102, chute; 103, limiting rod; 104, lifting ring; 105, communication hole; 106, limiting screw; 2, detection assembly; 201, adjusting frame; 202, mounting bracket; 203, positive earth pressure cell; 204, lateral earth pressure cell; 205, groove cover plate; 206, groove; 207, first signal line; 208, second signal line; 209, connecting rod; 2010, handle; 2011, mounting ear; 2012, laser range finder; 3, lateral earth pressure cell host; 4, positive earth pressure cell host. DETAILED DESCRIPTION

[0036] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0037] Embodiment 1

[0038] Please refer to Figures 1-9 As shown in the figure, a device for detecting the segregation degree of tailing bubble lightweight soil in situ, comprising a fixing assembly 1 and a detection assembly 2. The fixing assembly 1 comprises a sleeve 101 capable of filling tailing bubble lightweight soil inwardly, and the detection assembly 2 is slidably connected inside the sleeve 101 and arranged in an array between the detection assemblies 2. The detection assembly 2 comprises an adjusting frame 201 slidably connected to the inside of the sleeve 101 on both sides, a positive earth pressure cell 203 is installed in the middle of the bottom surface of the adjusting frame 201, or the bottom of the adjusting frame 201 is empty, a mounting bracket 202 is installed, a positive earth pressure cell 203 is fixedly installed in the middle of the mounting bracket 202, and a lateral earth pressure cell 204 is fixedly installed on the left lower segment inside the adjusting frame 201. When in use, the position of each detection assembly 2 inside the sleeve 101 is adjusted, so that the positions of the lateral earth pressure cell 204 and the positive earth pressure cell 203 are adjusted, which is suitable for detecting different detection points, and after adjustment, the technical solution is placed on the construction site to fill the tailing bubble lightweight soil, and when filling, the tailing bubble lightweight soil is filled inside the sleeve 101, and after filling, the filled tailing bubble lightweight soil is detected by the external lateral earth pressure cell 3 and the positive earth pressure cell host 4, the change range of the detection results is compared, the segregation condition is judged, and after detection is completed, the technical device is taken out when the tailing bubble lightweight soil is in the initial setting state, and the detection is completed.

[0039] As a technical optimization scheme of the present application, the horizontal plane of the lateral earth pressure cell 204 is located above the upward earth pressure cell 203, a groove 206 is formed in the left and right sides of the lower section of the adjusting frame 201 respectively, and the lateral earth pressure cell 204 is installed inside the left groove 206, the right groove 206 is a reserved groove for subsequent addition of detection equipment, and the right groove 206 is provided with a groove cover plate 205; a first signal line 207 is fixedly installed on the left side of the adjusting frame 201, and the first signal line 207 is electrically connected with the lateral earth pressure cell 204; a second signal line 208 is fixedly installed on the right side of the adjusting frame 201, and the second signal line 208 is electrically connected with the upward earth pressure cell 203; a connecting rod 209 is fixedly installed between the upper ends of the adjusting frame 201, and the upper end of the connecting rod 209 is fixedly installed with a handle 2010; an installation ear 2011 is fixedly installed on one side of the upper end of the adjusting frame 201, and a laser range finder 2012 is vertically fixedly installed on the installation ear 2011; when in use, the height of the adjusting frame 201 is adjusted through the handle 2010, and the lateral earth pressure cell 204 and the upward earth pressure cell 203 are equidistantly distributed through the laser range finder 2012, so that the positions of the lateral earth pressure cell 204 and the upward earth pressure cell 203 are adjusted, and when collecting data, the external lateral earth pressure cell host 3 and the upward earth pressure cell host 4 are connected with the first signal line 207 and the second signal line 208 respectively, so that the data is collected, and the use is convenient.

[0040] As a technical optimization scheme of the present application, the inside of the sleeve 101 is provided with a chute 102 on both sides, and the adjusting frame 201 is vertically slidably connected in the chute 102, and the top of the sleeve 101 is fixedly installed with a limiting rod 103, the limiting rod 103 crosses the adjusting frame 201 so that the adjusting frame 201 cannot be separated from the sleeve, and the upper end of the sleeve 101 is fixedly installed with a lifting ring 104 at four corners, and the both sides of the sleeve 101 are provided with a communication hole 105, the side where the communication hole 105 is located is away from the chute side, and the communication hole 105 is in communication with the inside of the sleeve 101. The outside of the sleeve 101 is provided with a plurality of limiting screws 106 on both sides of the top, one end of the limiting screw 106 extends into the inside of the chute 102 to the chute, one end of the limiting screw 106 abuts against the adjusting frame 201, by adopting the limiting screw 106, the position of the detection assembly 2 is fixed and adjusted, and when adjusting, the adjusting frame 201 moves in the inside of the chute 102, which is convenient to use.

[0041] The present application also provides a method for in-situ detection of the segregation degree of tailing bubble lightweight soil, which is performed by the device for in-situ detection of the segregation degree of tailing bubble lightweight soil, and the method is as follows:

[0042] Step one, first by laser range finder 2012 on the detection components 2 inserted in the casing 101 inside the depth of adjustment, so that the detection components 2 between the vertical equidistant distribution, a total of 5 layers, from top to bottom in turn for the first 5 layers, each layer is fixed by limiting screw 106.

[0043] Step two, the casing 101 is placed vertically on the detection site, the lateral earth pressure cell host 3 and the first signal line 207 is connected, and the positive earth pressure cell host 4 and the second signal line 208 are connected.

[0044] Step three, filling tailings bubble lightweight soil, tailings bubble lightweight soil through the communication hole 105 into the inside of the casing 101, until completely filled. At this time, through the positive earth pressure cell host 4, the positive earth pressure of the i layer positive earth pressure cell 203 at the initial filling time t0 is obtained Through the lateral earth pressure cell host 3, the lateral earth pressure of the i layer lateral earth pressure cell 204 at the initial filling time t0 is obtained

[0045] Step four, when the initial setting time t of tailings bubble lightweight soil is reached, the positive earth pressure of the i layer positive earth pressure cell 203 is recorded again vi,t And the lateral earth pressure of the i layer lateral earth pressure cell 204 hi,t .

[0046] Step five, calculate the positive earth pressure change amplitude Δ σ,vi And the lateral earth pressure change amplitude Δ σ,hi of the i layer tailings bubble lightweight soil at the initial filling time t0 and the initial setting time t, the calculation formula is as follows:

[0047]

[0048]

[0049] Step six, if the positive earth pressure change amplitude Δ σ,vi And the lateral earth pressure change amplitude Δ σ,hi of the i layer tailings bubble lightweight soil are within 10%, it is considered that the filling tailings bubble lightweight soil does not segregate; if the positive earth pressure change amplitude Δ σ,vi And the lateral earth pressure change amplitude Δ σ,hi of one or both are greater than 10%, it is considered that the filling tailings bubble lightweight soil appears to segregate.

[0050] Step seven, after the data acquisition is completed, the fixed component 1 and the detection component 2 are pulled out through the lifting ring 104, cleaned, and the detection position is refilled with tailings bubble lightweight soil to complete the detection.

[0051] Example 2:

[0052] According to the embodiment 1, the device of the application is used in practice, the actual process and data are as follows:

[0053] The device is placed in the foundation pit where the tailing bubble lightweight soil is filled, and the height of the foundation pit is 2.0 m. The distance between the detection assemblies is adjusted by the laser range finder, so that the mutual distance is 0.4 m, and there are 5 layers from top to bottom, which are the 1st to 5th layers.

[0054] The tailing bubble lightweight soil is filled, and the filling is stopped when the height of the tailing bubble lightweight soil reaches 2 m. At this time, the normal soil pressure and lateral soil pressure data of the 1st to 5th layers of the tailing bubble lightweight soil are collected in sequence, and the results are as follows:

[0055] The 1st layer: at the initial time t0, the normal soil pressure is 2.41 kN / m 2 , and the lateral soil pressure is 0.27 kN / m 2 ;

[0056] The 2nd layer: at the initial state t0, the normal soil pressure is 4.83 kN / m 2 , and the lateral soil pressure is 0.54 kN / m 2 ;

[0057] The 3rd layer: at the initial state t0, the normal soil pressure is 7.22 kN / m 2 , and the lateral soil pressure is 0.82 kN / m 2 ;

[0058] The 4th layer: at the initial state t0, the normal soil pressure is 9.65 kN / m 2 , and the lateral soil pressure is 1.22 kN / m 2 ;

[0059] The 5th layer: at the initial state t0, the normal soil pressure is 12.11 kN / m 2 , and the lateral soil pressure is 1.46 kN / m 2 .

[0060] After 2 h, the initial setting time t of the tailing bubble lightweight soil is reached, and the soil pressure and wave velocity data of the 1st to 5th layers of the tailing bubble lightweight soil are collected again, and the results are as follows:

[0061] The 1st layer: at the initial setting time t, the normal soil pressure v1,t is 2.24 kN / m 2, lateral earth pressure σ h1,t is 0.25 kN / m 2 ;

[0062] Layer 2: initial setting time t, normal earth pressure σ v2,t is 4.63 kN / m 2 , lateral earth pressure σ h2,t is 0.57 kN / m 2 ;

[0063] Layer 3: initial setting time t, normal earth pressure σ v3,t is 7.51 kN / m 2 , lateral earth pressure σ h3,t is 0.84 kN / m 2 ;

[0064] Layer 4: initial setting time t, normal earth pressure σ v4,t is 10.12 kN / m 2 , lateral earth pressure σ h4,t is 1.20 kN / m 2 ;

[0065] Layer 5: initial setting time t, normal earth pressure σ v5,t is 12.87 kN / m 2 , lateral earth pressure σ h5,t is 1.41 kN / m 2 .

[0066] The normal earth pressure variation range Δ σ,vi and the lateral earth pressure variation range Δ σ,hi of the tailings bubble lightweight soil of the first to fifth layers at the initial filling time t0 and the initial setting time t are calculated as follows:

[0067] Layer 1: normal earth pressure variation range Δ σ,v1 is 7.1%, lateral earth pressure variation range Δ σ,h1 is 7.4%;

[0068] Layer 2: normal earth pressure variation range Δ σ,v2 is 4.1%, lateral earth pressure variation range Δ σ,h2 is 5.6%;

[0069] Layer 3: normal earth pressure variation range Δ σ,v3 is 4.0%, lateral earth pressure variation range Δ σ,h3 is 2.4%;

[0070] Layer 4: normal earth pressure variation range Δ σ,v4 is 4.9%, lateral earth pressure variation range Δ σ,h4 is 1.6%;

[0071] Layer 5: the amplitude of the normal earth pressure change Δ σ,v5 is 6.3%, the amplitude of the lateral earth pressure change Δ σ,h5 is 3.4%.

[0072] The degree of segregation is evaluated, the amplitude of the normal earth pressure change Δ σ,vi and the amplitude of the lateral earth pressure change Δ σ,hi of each layer of the tailing bubble lightweight soil at the initial stage of pouring and after 2h initial setting are all within 10%, indicating that the tailing bubble lightweight soil has good homogeneity and good stability of the slurry, and thus it is considered that the filled tailing bubble lightweight soil does not segregate.

[0073] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application should be defined by the appended claims rather than the above description, and it is intended to include all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to which the reference signs relate.

[0074] Furthermore, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A device for detecting the degree of segregation of tailings bubble light soil in situ, characterized by: The utility model provides a device for detecting the degree of segregation of tailing bubble lightweight soil in situ, which comprises a fixing assembly, a detection assembly, a forward earth pressure cell host and a lateral earth pressure cell host, wherein the forward earth pressure cell host and the lateral earth pressure cell host are electrically connected with the detection assembly; the fixing assembly comprises a sleeve capable of being filled with tailing bubble lightweight soil from inside; the detection assembly comprises an adjusting frame which is slidably connected to the inside of the sleeve; a forward earth pressure cell is installed on the bottom of the adjusting frame; a lateral earth pressure cell is fixed on the side of the adjusting frame; the adjusting frames are arranged in an array; the forward earth pressure cell is installed in the middle of the bottom of the adjusting frame; the lateral earth pressure cell is installed on the lower section of the side of the adjusting frame; the horizontal plane of the lateral earth pressure cell is above the forward earth pressure cell; a sliding groove is formed on the inside of the sleeve; the adjusting frame is slidably connected to the inside of the sliding groove; a limiting rod is fixedly installed on the top of the sleeve; the limiting rod passes through the adjusting frame so that the adjusting frame cannot be separated from the sleeve; a lifting ring is fixedly installed on the four corners of the upper end of the sleeve; a communication hole is formed on the side of the sleeve; the side of the communication hole is away from the side of the sliding groove; the communication hole is in communication with the inside of the sleeve; the depth of the detection assembly inserted into the sleeve is adjusted by a laser range finder; the detection assemblies are vertically and equidistantly distributed; the detection assemblies are divided into five layers from top to bottom, i.e., the first layer, the second layer, the third layer, the fourth layer and the fifth layer; each layer is fixed by a limiting screw.

2. A device for detecting the degree of segregation of tailings bubble light soil in-situ according to claim 1, characterized in that: A groove is formed on the left and right sides of the adjusting frame; the lateral earth pressure cell is installed in the left groove; the right groove is provided with a groove cover plate; a first signal line is fixedly installed on the left side of the adjusting frame; the first signal line is electrically connected with the lateral earth pressure cell; a second signal line is fixedly installed on the right side of the adjusting frame; the second signal line is electrically connected with the forward earth pressure cell.

3. The device for detecting the degree of segregation of tailings bubble light soil in-situ according to claim 1, characterized in that: A connecting rod is fixedly installed between the adjusting frames; a handle is fixedly installed on the upper end of the connecting rod.

4. The device for detecting the degree of segregation of tailings bubble light soil in-situ according to claim 1, characterized in that: Limiting screws are arranged on the two sides of the upper part of the sleeve; one end of the limiting screw extends into the inside of the sleeve to the sliding groove; the other end of the limiting screw is in abutment with the adjusting frame.

5. The device for detecting the degree of segregation of tailings bubble light soil in-situ according to claim 1, characterized in that: An installation ear is fixedly installed on the top side of the adjusting frame; a laser range finder is vertically fixedly installed on the installation ear.

6. A method of detecting the degree of segregation of tailings bubble light soil in situ on site, characterized by: The device for detecting the degree of segregation of tailing bubble lightweight soil in situ according to any one of claims 1-5 is used in the following method: Step one: the depth of the detection assembly inserted into the sleeve is adjusted by a laser range finder; the detection assemblies are vertically and equidistantly distributed; the detection assemblies are divided into five layers from top to bottom, i.e., the first layer, the second layer, the third layer, the fourth layer and the fifth layer; each layer is fixed by a limiting screw; Step two: the sleeve is vertically placed on the detection site; the lateral earth pressure cell host is connected with the first signal line; the forward earth pressure cell host is connected with the second signal line; Step three, filling tailings bubble lightweight soil, tailings bubble lightweight soil through the communication hole into the inside of the casing, until completely filled; at this time through the positive earth pressure cell host obtained the i layer positive earth pressure cell in the initial filling moment t0 positive earth pressure Through the lateral earth pressure cell host obtained the i layer lateral earth pressure cell in the initial filling moment t0 lateral earth pressure Step four, when the tailing bubble light soil initial setting time t is reached, the positive earth pressure of the i-th layer of the positive earth pressure cell is recorded again vi,t and the lateral earth pressure of the i-th layer of the lateral earth pressure cell hi,t ; Step five, calculate the positive earth pressure variation range Δ of the i th layer tailing bubble lightweight soil at initial filling time t0 and initial setting time t σ,vi and lateral earth pressure variation range Δ σ,hi , the calculation formula is as follows: Step 6: If the variation range Δ of the positive earth pressure on the i-th layer of tailings bubble-light soil is... σ,vi and the amplitude of change in lateral earth pressure Δ σ,hi If all values ​​are within 10%, it is considered that the lightweight soil containing tailings bubbles does not segregate. If the change amplitude Δ σ,vi and the change amplitude Δ σ,hi of the lateral earth pressure are both greater than 10%, it is considered that the tailing bubble lightweight soil appears segregation. Step seven: after data collection is completed, the fixing assembly and the detection assembly are pulled out and cleaned through the lifting ring; the detection position is refilled with tailing bubble lightweight soil; the detection is completed.

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