CN114674591A - Undisturbed rock-soil body sampling device and method - Google Patents
Undisturbed rock-soil body sampling device and method Download PDFInfo
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- CN114674591A CN114674591A CN202210174826.4A CN202210174826A CN114674591A CN 114674591 A CN114674591 A CN 114674591A CN 202210174826 A CN202210174826 A CN 202210174826A CN 114674591 A CN114674591 A CN 114674591A
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Abstract
The invention provides an undisturbed rock-soil body sampling device and method, which belong to the technical field of soil body sampling, and comprise a sample storage component and a separation component, wherein a first sampling box in the sample storage component is constructed to be used for wrapping a soil body sample, a second sampling box is sleeved on the outer side of the first sampling box, a gap between the first sampling box and the second sampling box is constructed to be used for filling buffer sand, a first sampling cover is clamped at one end part of the second sampling box, and a second sampling cover is clamped at the other end part of the second sampling box. First inserting grooves are formed in one ends of second sampling boxes in the separating assemblies, one ends of sample cutting reinforcing steel bars are inserted into the second sampling boxes through the first inserting grooves, the other ends of the sample cutting reinforcing steel bars are inserted between two limiting blocks, and the limiting blocks are fixed on first sampling covers. This device provides the assurance of obtaining its original state sample to the soil body that the structure easily scatters, the breakable rock mass of multi-structure face, and whole device simple structure, portable, disturbance and crowded native effect are little in the sampling process.
Description
Technical Field
The invention relates to the technical field of soil body sampling, in particular to an undisturbed rock-soil body sampling device and method.
Background
The original state sampling is carried out on soil bodies with easily scattered structures and rock bodies with fragile multi-structure surfaces, and a foundation is provided for researches on strength parameters, deformation parameters, consolidation compaction parameter tests and the like. The existing soil sampling methods mainly comprise a press-in method, a drive-in method and a rotary drive-in method, which greatly disturb the structure of the rock-soil mass, particularly sample the original state of the rock-soil mass which is easy to break and disperse. The boundary effect of the undisturbed sample in the mechanical test is eliminated, and the possibility of improving the accuracy of rock-soil body strength parameters and the like is provided.
At present, a reliable method for obtaining an original-state sample meeting the accuracy of strength mechanical parameters on site still does not exist, and the main reasons are that soil bodies with easily scattered structures and rock bodies with fragile multi-structural surfaces are easily disturbed in the sampling process, and the sample boundary is easily uneven, so that the sample generates a boundary effect in the stress process, namely, the boundary of a protruding part is stressed firstly, and the sample boundary is stressed integrally after the uneven phenomenon disappears and becomes flat. The boundary effect does not meet the requirement of strength mechanical parameter test because the soil body with the same underground depth is uniformly and equally stressed in engineering practice, which hinders the accuracy research of the stress state of the actual rock-soil body.
Disclosure of Invention
In order to make up for the defects, the invention provides an undisturbed rock-soil body sampling device and method, and aims to solve the problem that the existing soil body sampling device has large disturbance on a soil body structure and causes obstruction to the accuracy research of the stress state of an actual soil body.
The invention is realized in the following way: the invention provides an undisturbed rock-soil body sampling device which comprises a sample storage component and a separation component, wherein the separation component is arranged on the sample storage component, the sample storage component is used for storing a soil body sample, and the separation component is used for separating the soil body sample from the ground.
Store up appearance subassembly includes first sampling box, second sampling box, first sampling lid and second sampling lid, first sampling box is constructed and is used for the parcel soil body sample, the second sampling box cup joints the outside of first sampling box, first sampling box with clearance between the second sampling box is constructed and is used for pouring into the buffering sand, first sampling lid joint is in the one end tip of second sampling box, second sampling lid joint in the second sampling box is kept away from the one end tip of first sampling lid.
The separating assembly comprises a sample cutting reinforcing steel bar and limiting blocks, a plurality of first inserting grooves are uniformly formed in the end portion of one end of the second sampling box, one end of the sample cutting reinforcing steel bar is inserted into the second sampling box through the first inserting grooves, the other end of the sample cutting reinforcing steel bar is inserted between the two limiting blocks, and the limiting blocks are fixedly mounted on the first sampling cover.
In an embodiment of the present invention, mounting blocks are fixed on both sides of one end of the second sampling box away from the first sampling cover, a second insertion groove is formed on the mounting blocks, a cutting plate is inserted into the second insertion groove, a cutting seam is formed in the middle of the second sampling box, and connecting clips are arranged on both sides of the cutting seam and fixedly mounted on the second sampling box.
In one embodiment of the invention, a limiting plate is fixed at one end of the cutting plate, the limiting plate is arranged outside the mounting block, and a third handle is fixed on one surface of the limiting plate, which is far away from the cutting plate.
In one embodiment of the invention, the end part of the sample cutting plate, which is far away from the limit plate, is provided with a sharp corner.
In one embodiment of the present invention, first lifting rings are fixed at four corners of the top end of the first sampling box, and the first lifting rings are configured to lift the first sampling box.
In one embodiment of the invention, four second lifting rings are symmetrically fixed on the outer side of the second sampling box, and the second lifting rings are configured for lifting the second sampling box.
In one embodiment of the present invention, the four corners of the first sampling cap may be provided with a supporting seat configured to support the first sampling cap.
In one embodiment of the present invention, a first handle is fixed to both sides of the first sampling cap, and a second handle is fixed to both sides of the second sampling cap.
In one embodiment of the invention, both ends of the cut steel bar are provided with tapered angles.
The embodiment of the application further provides an undisturbed rock-soil mass sampling method, which is implemented by using the undisturbed rock-soil mass sampling device, and comprises the following steps:
the method comprises the following steps: firstly, vertically placing a first sampling box on a relatively flat foundation surface after cleaning, excavating outside rock and soil bodies along the peripheral boundary of the first sampling box, and vertically placing the first sampling box until the top surface of the first sampling box is equal to or slightly lower than the top surface of a pre-fetched original sample;
step two: then cutting and sawing the top surface of the pre-taken undisturbed sample along the top surface boundary of the first sampling box by using a wire saw, further storing a soil sample in the first sampling box, then vertically putting a second sampling box, wherein the second sampling box is sleeved on the outer side of the first sampling box, so that the second sampling box and the first sampling box are in the same depth and the same central position, and a gap of 0.5cm is formed between the second sampling box and the first sampling box;
Step three: filling buffer sand into a gap between the first sampling box and the second sampling box, mounting a first lifting ring on the first sampling box, fixing a lifting steel wire on the first lifting ring, slowly and vertically pulling out the first sampling box upwards by using lifting equipment, covering the top surface of the second sampling box with flat buffer sand with the thickness of 0.5cm, and covering the top end of a soil sample in the second sampling box with the buffer sand;
step four: then the first sampling cover is clamped at the top end of the second sampling box, one end of a sample cutting reinforcing steel bar is inserted into a first inserting groove at the bottom end of the second sampling box, the other end of the sample cutting reinforcing steel bar is inserted between two limiting blocks on the first sampling cover, two sides of the second sampling box are inserted with the sample cutting reinforcing steel bar, the bottom ends of the two sample cutting reinforcing steel bars realize the cutting off of a soil body sample in the second sampling box, the separation of the soil body sample from the ground is realized, and the distance between the sample cutting reinforcing steel bars is determined according to the structural stability of the soil body sample; when the cohesive force of the soil body sample is very small, the sample cutting reinforcing steel bars are not inserted, but the sample cutting plates are inserted into the mounting blocks at the two sides of the bottom end of the second sampling box, and the two sample cutting plates are inserted into the second sampling box, so that the soil body sample in the second sampling box is cut off, and further the soil body sample is separated from the ground;
Step five: then installing a second lifting ring outside the second sampling box, fixing a lifting steel wire on the second lifting ring, slowly and vertically pulling out the second sampling box upwards by using lifting equipment, further pulling out a soil body sample in the second sampling box simultaneously, installing a supporting seat on a first sampling cover, then integrally overturning the second sampling box, further downwards arranging the first sampling cover at the top end of the second sampling box, and abutting the supporting seat on the first sampling cover against the ground to support the second sampling box, wherein the soil body sample in the second sampling box is inversely placed on a plane;
step six: then take off from the second sample box and cut a kind reinforcing bar or cut a kind board, and then soil sample exposes the second sample box in the second sample box, the top surface at this moment at the second sample box is sawn flat with the scroll saw cutting, then covers a bed thickness and be 0.5cm and smooth buffering sand, then connects second sample lid joint on the second sample box, and then first sample lid, second sample box and second sample lid form airtight space and wrap up buffering sand and soil body sample, and then accomplish the sample of soil body sample.
The invention has the beneficial effects that: 1. the device provides guarantee for obtaining an undisturbed sample of the soil body with a scattered structure and the rock body with a fragile multi-structure surface;
2. The whole device has simple structure, is convenient to carry, has small disturbance and soil squeezing effect in the sampling process, saves time and labor, has low cost and simple and convenient operation, and improves the working efficiency;
3. the prepared original-state sample can avoid the boundary effect generated by the stress of the uneven boundary surface, so that the stress of the sample is closer to the actual engineering state, and the requirement of testing the strength mechanical parameters is met;
4. the prepared undisturbed sample has a stable structure, and the shape and the volume can be freely controlled according to the size of the sampling box;
5. the prepared undisturbed sample, the sample storage component and the buffering sand can be directly subjected to on-site or indoor mechanical tests, particularly direct shear tests.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram illustrating a positional relationship between a second sampling box, a first sampling cover and a sample cutting reinforcing bar according to an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1 taken at A in the present invention;
FIG. 3 is a schematic diagram illustrating a positional relationship between a first sampling box and a second sampling box according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the position relationship between the second sampling box and the first and second sampling covers according to the embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a sample-completed structure according to an embodiment of the present invention;
FIG. 6 is a schematic perspective view of a second sampling cap according to an embodiment of the present invention;
fig. 7 is a schematic perspective view of a second sampling box and a sample-cutting reinforcing steel bar after being turned over according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a second sampling box and a sample-cutting reinforcing steel bar after being turned over according to an embodiment of the present invention;
FIG. 9 is a schematic perspective view of a first sampling cap according to an embodiment of the present invention;
FIG. 10 is a schematic view of a state where a cutting plate is inserted into a second sampling box according to an embodiment of the present invention;
FIG. 11 is a schematic view of a sample cutting plate and a second sample box according to an embodiment of the present invention;
FIG. 12 is an enlarged view of FIG. 11 taken at B in the present invention;
FIG. 13 is a schematic view of the structure of the sample cutting plate inserted into the second sampling box according to the embodiment of the present invention;
fig. 14 is a schematic perspective view of a cutting plate according to an embodiment of the present invention.
In the figure: 100-a sample storage assembly; 110-a first sampling cassette; 111-a first lifting ring; 120-a second sampling box; 121-a first plug groove; 122-a mounting block; 1221-a second plug-in slot; 123-cutting the sample plate; 1231-limiting plate; 1232-third handle; 1233-sharp corner; 124-a second lifting ring; 125-cutting the seam; 130-a first sampling cap; 131-a support seat; 132-a first handle; 140-a second sampling cap; 141-a second handle; 150-a joining clip; 200-a separation assembly; 210-cutting the reinforcing steel bars; 211-cone angle; 220-a limiting block; 300-soil sample; 400-buffering sand.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Examples
Referring to fig. 1, the present invention provides a technical solution: an undisturbed rock-soil body sampling device comprises a sample storage assembly 100 and a separation assembly 200, wherein the separation assembly 200 is installed on the sample storage assembly 100, the sample storage assembly 100 is used for storing a soil body sample 300 (shown in figure 4), and the separation assembly 200 is used for separating the soil body sample 300 from the ground.
Referring to fig. 3, 4 and 5, the sample storage assembly 100 includes a first sampling box 110, a second sampling box 120, a first sampling cover 130 and a second sampling cover 140, the first sampling box 110 is configured to wrap a soil sample 300, the second sampling box 120 is sleeved outside the first sampling box 110, the second sampling box 120 and the first sampling box 110 are disposed at the same depth and the same center position, a 0.5cm gap is formed between the second sampling box 120 and the first sampling box 110, the gap between the first sampling box 110 and the second sampling box 120 is configured to be filled with buffering sand 400, the first sampling cover 130 is fastened to an end of the second sampling box 120, and the second sampling cover 140 is fastened to an end of the second sampling box 120 far from the first sampling cover 130. And then the first sampling cover 130, the second sampling box 120 and the second sampling cover 140 form a closed space to wrap the buffering sand 400 and the soil sample 300, thereby completing the storage of the soil sample 300.
Referring to fig. 3, in a specific use, the first lifting rings 111 are fixed to four corners of the top of the first sampling box 110 by screw threads, the first lifting rings 111 are configured to lift the first sampling box 110, when the first sampling box 110 needs to be taken out, the lifting steel wire is fixed to the first lifting rings 111, and the first sampling box 110 is slowly and vertically taken out by using a lifting device. Four second lifting rings 124 are symmetrically and threadedly fixed on the outer side of the second sampling box 120, and the second lifting rings 124 are configured to lift the second sampling box 120. When the second sampling box 120 and the soil sample 300 inside the second sampling box 120 need to be taken out, the lifting steel wire is fixed on the second lifting ring 124, the second sampling box 120 is slowly and vertically pulled out upwards by utilizing lifting equipment, and then the soil sample 300 in the second sampling box 120 is pulled out simultaneously, so that the operation is convenient, the first lifting ring 111 and the second lifting ring 124 are detachably mounted with the first sampling box 110 and the second sampling box 120 respectively, the first lifting ring 111 and the second lifting ring 124 can be detached when not needed, and the use of the first sampling box 110 and the second sampling box 120 is prevented from being influenced.
Referring to fig. 1 and 7, in an embodiment of the present invention, a support 131 may be installed at each of four corners of the first sampling cap 130, the support 131 is configured to support the first sampling cap 130, when the second sampling box 120 is turned over and the first sampling cap 130 faces downward, the support 131 faces downward together with the first sampling cap 130, and then the support 131 abuts against the ground, so as to support the first sampling cap 130, and improve the stability and firmness of the entire apparatus after turning over. When the sampling device is specifically arranged, the first handle 132 is fixed to two sides of the first sampling cover 130 through welding (as shown in fig. 9), the second handle 141 is fixed to two sides of the second sampling cover 140 through welding (as shown in fig. 6), so that a worker can conveniently clamp the first sampling cover 130 and the second sampling cover 140 into the second sampling box 120 or take the first sampling cover 130 and the second sampling cover 140 off the second sampling box 120 through the first handle 132 and the second handle 141 by hand, and the sampling device is convenient to work.
Referring to fig. 2, 7 and 8, the separating assembly 200 includes sample cutting bars 210 and limiting blocks 220, wherein a plurality of first inserting grooves 121 are uniformly formed on two sides of a lower end of the second sampling box 120, a lower end of the sample cutting bars 210 are inserted into the second sampling box 120 through the first inserting grooves 121, an upper end of the sample cutting bars 210 is inserted between the two limiting blocks 220, the limiting blocks 220 are fixedly mounted on the first sampling cover 130 by welding, it should be noted that the sample cutting bars 210 are Contraband-shaped, a length of the lower end bars of the sample cutting bars 210 is half of a length of the first sampling cover 130, a length of the upper end bars of the sample cutting bars 210 is 5-8cm, a height of the sample cutting bars 210 is equal to a height of the second sampling box 120, the lower end bars of the sample cutting bars 210 opposite to each other on two sides of the second sampling box 120 are inserted into the soil sample 300 in the second sampling box 120, and the lower end bars of the two sample cutting bars 210 are just abutted against each other, further, the bottom end of the soil sample 300 is cut off, the soil sample 300 and the ground are cut off through the multiple groups of sample cutting steel bars 210, and then the soil sample 300 is separated from the ground. When specifically setting up, the both ends tip of cutting appearance reinforcing bar 210 all is provided with taper angle 211, reduces the resistance that cuts appearance reinforcing bar 210 and insert in soil body sample 300, saves strength, makes things convenient for the insertion of cutting appearance reinforcing bar 210.
Referring to fig. 10, fig. 11 and fig. 12, in addition, in an embodiment of the present invention, both sides of one end of the second sampling box 120 away from the first sampling cover 130 are fixed with the mounting block 122 through bolts, the mounting block 122 is provided with a second inserting groove 1221, and the cutting plate 123 is inserted into the second inserting groove 1221. When the cohesive force of the soil sample 300 is very small, the sample cutting reinforcing steel bars 210 are not inserted, but the sample cutting plates 123 are inserted into the mounting blocks 122 on the two sides of the bottom end of the second sampling box 120, and the two sample cutting plates 123 are inserted into the lower end of the second sampling box 120, so that the soil sample 300 in the second sampling box 120 is cut off, and the soil sample 300 is separated from the ground.
Referring to fig. 4, a cutting slit 125 is formed in the middle of the second sampling box 120, connecting clips 150 are disposed on two sides of the cutting slit 125, the connecting clips 150 are fixedly mounted on the second sampling box 120, and the connecting clips 150 are directly removed to implement a cutting test.
Referring to fig. 11, 13 and 14, in a specific setting, a limiting plate 1231 is fixed to an end of the sample cutting plate 123 by welding, the limiting plate 1231 is disposed outside the mounting block 122 to limit the sample cutting plate 123, so that the sample cutting plate 123 is prevented from entering the mounting block 122 and being inconvenient to take out, a third handle 1232 is fixed to a surface of the limiting plate 1231 away from the sample cutting plate 123, and a worker can pull out or insert the sample cutting plate 123 from the mounting block 122 through the third handle 1232, thereby facilitating operation. The tip angle 1233 is arranged at the end part of the sample cutting plate 123 far away from the limiting plate 1231, so that the resistance of the sample cutting plate 123 when inserted into the soil sample 300 is reduced, the soil sample 300 can be conveniently cut off, and the labor is saved.
It should be noted that the main component of the buffering sand 400 is the ISO standard sand in china, which is a key receptor for making the stress state of the undisturbed rock-soil mass sample close to the actual engineering state. In view of the characteristics of convenient and easy obtaining, easy trimming, small grain diameter and light weight of the standard sand, the standard sand can be used as a medium for filling the uneven boundary of the sample, thereby solving the boundary effect of the sample. The technical index characteristics of the standard sand are as follows: the grain size is multistage (when the aperture of the square-hole sieve is 0.65mm, 0.40mm and 0.25mm, the cumulative screen residue is less than 3%, 35-45% and more than 94%), the grain size is 0.08-2.00 mm, and the density is about 2.67g/cm for carrying out the thin film cultivation.
The embodiment of the application further provides an undisturbed rock-soil mass sampling method, which is implemented by using the undisturbed rock-soil mass sampling device, and comprises the following steps:
the method comprises the following steps: firstly, vertically placing a first sampling box 110 on a relatively flat ground surface after cleaning, excavating outside rock and soil bodies along the peripheral boundary of the first sampling box 110 and keeping vertically placing the first sampling box 110 until the top surface of the first sampling box 110 is equal to or slightly lower than the top surface of a pre-fetched original sample;
step two: then, cutting and sawing the top surface of the pre-taken undisturbed sample along the boundary of the top surface of the first sampling box 110 by using a wire saw, further storing a soil sample 300 in the first sampling box 110, then vertically lowering the second sampling box 120, wherein the second sampling box 120 is sleeved outside the first sampling box 110, so that the second sampling box 120 and the first sampling box 110 are in the same depth and the same central position, and a gap of 0.5cm is formed between the second sampling box 120 and the first sampling box 110;
Step three: then filling buffer sand 400 into a gap between the first sampling box 110 and the second sampling box 120, then installing a first hoisting ring 111 on the first sampling box 110, fixing a hoisting steel wire on the first hoisting ring 111, slowly and vertically drawing out the first sampling box 110 upwards by using hoisting equipment, then covering the top surface of the second sampling box 120 with flat buffer sand 400 with the thickness of 0.5cm, and covering the top end of a soil sample 300 in the second sampling box 120 with the buffer sand 400;
step four: then the first sampling cover 130 is clamped at the top end of the second sampling box 120, then one end of a sample cutting reinforcing steel bar 210 is inserted into the first inserting groove 121 at the bottom end of the second sampling box 120, the other end of the sample cutting reinforcing steel bar 210 is inserted between the two limiting blocks 220 on the first sampling cover 130, the two sides of the second sampling box 120 are inserted with the sample cutting reinforcing steel bar 210, the bottom ends of the two sample cutting reinforcing steel bars 210 cut off the soil sample 300 inside the second sampling box 120, separation of the soil sample 300 from the ground is realized, and the distance between the sample cutting reinforcing steel bars 210 is determined according to the structural stability of the soil sample 300; when the cohesive force of the soil sample 300 is very small, the sample cutting reinforcing steel bars 210 are not inserted, but the sample cutting plates 123 are inserted into the mounting blocks 122 on the two sides of the bottom end of the second sampling box 120, and the two sample cutting plates 123 are inserted into the second sampling box 120, so that the soil sample 300 in the second sampling box 120 is cut off, and the soil sample 300 is separated from the ground;
Step five: then, a second lifting ring 124 is installed on the outer side of the second sampling box 120, a lifting steel wire is fixed on the second lifting ring 124, the second sampling box 120 is slowly and vertically pulled upwards by using lifting equipment, then the soil sample 300 in the second sampling box 120 is pulled out at the same time, a supporting seat 131 on a first sampling cover 130 is installed, then the second sampling box 120 is integrally turned over, further the first sampling cover 130 at the top end of the second sampling box 120 faces downwards, the supporting seat 131 on the first sampling cover 130 is abutted against the ground, the second sampling box 120 is supported, and at the moment, the soil sample 300 in the second sampling box 120 is inversely placed on a plane;
step six: then the cutting bar 210 or the cutting plate 123 is taken down from the second sampling box 120, and the soil sample 300 in the second sampling box 120 is exposed out of the second sampling box 120, the top surface of the second sampling box 120 is cut and sawn flat by a wire saw, and then a flat buffer sand 400 with the thickness of 0.5cm is covered, and then the second sampling cover 140 is clamped on the second sampling box 120, and then the first sampling cover 130, the second sampling box 120 and the second sampling cover 140 form a closed space to wrap the buffer sand 400 and the soil sample 300, thereby completing the sampling of the soil sample 300.
Specifically, this original state ground body sampling device's theory of operation: firstly, vertically placing a first sampling box 110 on a smooth foundation surface after cleaning, excavating outside rock-soil bodies along the peripheral boundary of the first sampling box 110 and vertically placing the first sampling box 110 until the top surface of the first sampling box 110 is equal to or slightly lower than the top surface of a pre-fetched original sample;
then, cutting and sawing the top surface of the prefetched undisturbed sample along the boundary of the top surface of the first sampling box 110 by using a wire saw, further storing a soil sample 300 in the first sampling box 110, then vertically putting down the second sampling box 120, sleeving the second sampling box 120 on the outer side of the first sampling box 110, enabling the second sampling box 120 and the first sampling box 110 to be in the same depth and the same central position, and forming a gap of 0.5cm between the second sampling box 120 and the first sampling box 110;
then filling buffer sand 400 into a gap between the first sampling box 110 and the second sampling box 120, then installing a first hoisting ring 111 on the first sampling box 110, fixing a hoisting steel wire on the first hoisting ring 111, slowly and vertically drawing out the first sampling box 110 upwards by using hoisting equipment, then covering the top surface of the second sampling box 120 with flat buffer sand 400 with the thickness of 0.5cm, and covering the top end of a soil sample 300 in the second sampling box 120 with the buffer sand 400;
Then the first sampling cover 130 is clamped at the top end of the second sampling box 120, then one end of a sample cutting reinforcing steel bar 210 is inserted into the first inserting groove 121 at the bottom end of the second sampling box 120, the other end of the sample cutting reinforcing steel bar 210 is inserted between the two limiting blocks 220 on the first sampling cover 130, the two sides of the second sampling box 120 are inserted with the sample cutting reinforcing steel bar 210, the bottom ends of the two sample cutting reinforcing steel bars 210 cut off the soil sample 300 inside the second sampling box 120, separation of the soil sample 300 from the ground is realized, and the distance between the sample cutting reinforcing steel bars 210 is determined according to the structural stability of the soil sample 300; when the cohesive force of the soil sample 300 is very small, the sample cutting reinforcing steel bars 210 are not inserted, but the sample cutting plates 123 are inserted into the mounting blocks 122 on the two sides of the bottom end of the second sampling box 120, and the two sample cutting plates 123 are inserted into the second sampling box 120, so that the soil sample 300 in the second sampling box 120 is cut off, and the soil sample 300 is separated from the ground;
then, installing a second lifting ring 124 on the outer side of the second sampling box 120, fixing a lifting steel wire on the second lifting ring 124, slowly and vertically pulling out the second sampling box 120 upwards by using lifting equipment, further pulling out the soil sample 300 in the second sampling box 120 simultaneously, installing a supporting seat 131 on a first sampling cover 130, then integrally turning over the second sampling box 120, further leading the first sampling cover 130 at the top end of the second sampling box 120 to face downwards, and leading the supporting seat 131 on the first sampling cover 130 to be abutted against the ground so as to support the second sampling box 120, and at the moment, inversely placing the soil sample 300 in the second sampling box 120 on a plane;
Then the sample cutting reinforcing steel bar 210 or the sample cutting plate 123 is taken down from the second sampling box 120, the soil sample 300 in the second sampling box 120 is exposed out of the second sampling box 120, the top surface of the second sampling box 120 at the moment is cut and sawn flat by a wire saw, then the buffering sand 400 with the thickness of 0.5cm and flatness is covered, then the second sampling cover 140 is clamped on the second sampling box 120, and then the first sampling cover 130, the second sampling box 120 and the second sampling cover 140 form a closed space to wrap the buffering sand 400 and the soil sample 300, thereby completing the sampling of the soil sample 300.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An undisturbed rock-soil body sampling device is characterized by comprising
The sample storage assembly (100) comprises a first sampling box (110), a second sampling box (120), a first sampling cover (130) and a second sampling cover (140), wherein the first sampling box (110) is configured to wrap a soil sample (300), the second sampling box (120) is sleeved outside the first sampling box (110), a gap between the first sampling box (110) and the second sampling box (120) is configured to be used for filling buffer sand (400), the first sampling cover (130) is clamped at one end of the second sampling box (120), and the second sampling cover (140) is clamped at one end of the second sampling box (120) far away from the first sampling cover (130);
The separating assembly (200) comprises sample cutting reinforcing steel bars (210) and limiting blocks (220), a plurality of first inserting grooves (121) are uniformly formed in the end portion of one end of the second sampling box (120), one end of each sample cutting reinforcing steel bar (210) is inserted into the second sampling box (120) through the corresponding first inserting groove (121), the other end of each sample cutting reinforcing steel bar (210) is inserted between the two limiting blocks (220), and the limiting blocks (220) are fixedly mounted on the first sampling cover (130).
2. The undisturbed rock-soil mass sampling device of claim 1, wherein both sides of one end of the second sampling box (120) far away from the first sampling cover (130) are fixed with mounting blocks (122), the mounting blocks (122) are provided with second insertion grooves (1221), the second insertion grooves (1221) are inserted with cutting plates (123), the middle of the second sampling box (120) is provided with a cutting slot (125), both sides of the cutting slot (125) are provided with connecting clamps (150), and the connecting clamps (150) are fixedly mounted on the second sampling box (120).
3. The undisturbed rock-soil sampling device of claim 2 wherein a limiting plate (1231) is fixed to one end of the sample cutting plate (123), the limiting plate (1231) is arranged outside the mounting block (122), and a third handle (1232) is fixed to one surface of the limiting plate (1231) far away from the sample cutting plate (123).
4. The undisturbed rock mass sampling device of claim 3 wherein the end of the template (123) remote from the limiting plate (1231) is provided with a sharp corner (1233).
5. The undisturbed rock-soil sampling device of claim 1 wherein four corners of the top of the first sampling box (110) are respectively provided with a first lifting ring (111), and the first lifting rings (111) are configured for lifting the first sampling box (110).
6. The undisturbed rock-soil sampling device of claim 1 wherein four second lifting rings (124) are symmetrically fixed to the outside of the second sampling box (120), and the second lifting rings (124) are configured for lifting the second sampling box (120).
7. The undisturbed rock-soil sampling apparatus of claim 1 wherein the four corners of the first sampling cap (130) are each provided with a support seat (131), the support seats (131) being configured to support the first sampling cap (130).
8. The undisturbed rock mass sampling apparatus of claim 1 wherein a first handle (132) is fixed to each side of the first sampling cap (130) and a second handle (141) is fixed to each side of the second sampling cap (140).
9. The undisturbed rock-soil sampling device of claim 1 wherein the ends of the cut steel bars (210) are each provided with a taper angle (211).
10. An undisturbed rock-soil mass sampling method which is carried out by using the undisturbed rock-soil mass sampling device of any one of claims 1 to 9, and is characterized by comprising the following steps:
the method comprises the following steps: firstly, vertically placing a first sampling box on a relatively flat foundation surface after cleaning, excavating outside rock and soil bodies along the peripheral boundary of the first sampling box, and vertically placing the first sampling box until the top surface of the first sampling box is equal to or slightly lower than the top surface of a pre-fetched original sample;
step two: then cutting and sawing the top surface of the pre-taken undisturbed sample along the top surface boundary of the first sampling box by using a wire saw, further storing a soil sample in the first sampling box, then vertically putting a second sampling box, wherein the second sampling box is sleeved on the outer side of the first sampling box, so that the second sampling box and the first sampling box are in the same depth and the same central position, and a gap of 0.5cm is formed between the second sampling box and the first sampling box;
step three: filling buffer sand into a gap between the first sampling box and the second sampling box, mounting a first lifting ring on the first sampling box, fixing a lifting steel wire on the first lifting ring, slowly and vertically pulling out the first sampling box upwards by using lifting equipment, covering the top surface of the second sampling box with flat buffer sand with the thickness of 0.5cm, and covering the top end of a soil sample in the second sampling box with the buffer sand;
Step four: then the first sampling cover is clamped at the top end of the second sampling box, one end of a sample cutting reinforcing steel bar is inserted into a first inserting groove at the bottom end of the second sampling box, the other end of the sample cutting reinforcing steel bar is inserted between two limiting blocks on the first sampling cover, two sides of the second sampling box are inserted with the sample cutting reinforcing steel bar, the bottom ends of the two sample cutting reinforcing steel bars realize the cutting off of a soil body sample in the second sampling box, the separation of the soil body sample from the ground is realized, and the distance between the sample cutting reinforcing steel bars is determined according to the structural stability of the soil body sample; when the cohesive force of the soil body sample is very small, the sample cutting reinforcing steel bars are not inserted, but the sample cutting plates are inserted into the mounting blocks at the two sides of the bottom end of the second sampling box, and the two sample cutting plates are inserted into the second sampling box, so that the soil body sample in the second sampling box is cut off, and further the soil body sample is separated from the ground;
step five: then installing a second lifting ring outside the second sampling box, fixing a lifting steel wire on the second lifting ring, slowly and vertically pulling out the second sampling box upwards by using lifting equipment, further pulling out a soil body sample in the second sampling box simultaneously, installing a supporting seat on a first sampling cover, then integrally overturning the second sampling box, further downwards arranging the first sampling cover at the top end of the second sampling box, and abutting the supporting seat on the first sampling cover against the ground to support the second sampling box, wherein the soil body sample in the second sampling box is inversely placed on a plane;
Step six: then take off from the second sample box and cut a kind reinforcing bar or cut a kind board, and then soil sample exposes the second sample box in the second sample box, the top surface at this moment at the second sample box is sawn flat with the scroll saw cutting, then covers a bed thickness and be 0.5cm and smooth buffering sand, then connects second sample lid joint on the second sample box, and then first sample lid, second sample box and second sample lid form airtight space and wrap up buffering sand and soil body sample, and then accomplish the sample of soil body sample.
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