Stress sensor assembly and method of installing a sensor assembly

Abstract

The embodiment of the present application provides a stress sensor assembly and a sensor assembly mounting method. The stress sensor assembly comprises a sensor body, a positioning rod, an elastic sleeve, a fluid anchor layer and a deformation expansion piece. The sensor body is arranged in a borehole, the positioning rod extends in a first direction, one end of the positioning rod is connected with the sensor body, the extension direction of the positioning rod in the first direction is arranged, the elastic sleeve is sleeved outside the positioning rod, the elastic sleeve has a gap with the positioning rod, the deformation expansion piece has an initial position and an extrusion position, the deformation expansion piece is sleeved on the positioning rod, the deformation expansion piece is arranged on the second end of the elastic sleeve in the initial position, and the deformation expansion piece is arranged in the elastic sleeve in the extrusion position. Therefore, the stress sensor assembly provided by the embodiment of the present application has the advantages of simple structure and high construction convenience.

Description

Technical Field

[0001] This invention relates to the field of high stress monitoring of rock masses, specifically to a stress sensor assembly and a method for installing the stress sensor assembly. Background Technology

[0002] The problems of high stress and engineering disturbances in deep rock masses are becoming increasingly prominent, with frequent disasters such as rock instability, rockbursts, rock bursts, and water inrushes occurring during deep engineering construction. Under high ground stress, rock masses experience localized stress concentration during excavation or other disturbances. When stress accumulates to a certain level, borehole deformation compresses the strain gauge. Strain gauges in strain sensors are either bonded to the surface of an elastic body or directly to the test specimen. The deformation of the elastic body or specimen is transmitted to the sensitive grid through the substrate and adhesive, causing a corresponding change in its resistance. This change is converted into a voltage or current change by a conversion circuit, allowing for strain measurement. This allows for the determination of the time, location, and energy of rock fracture, providing guidance for engineering projects and ensuring construction safety. During construction, the sensor needs to be mechanically fixed into the borehole, and grout is injected into the borehole to secure the stress sensor.

[0003] In related technologies, a hydraulic pump and grouting pipe are used to inject grout into the borehole to fix the sensor. Because rock stress detection typically requires multiple stress monitoring points to achieve comprehensive stress monitoring, and these monitoring points are spaced apart, installing the sensor at one monitoring point using a hydraulic pump and grouting pipe requires manual transport of the hydraulic pump and grouting pipe to the next monitoring point, resulting in high labor intensity and low construction efficiency. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a stress sensor assembly. This stress sensor assembly has the advantages of simple structure and high ease of construction.

[0005] Embodiments of the present invention also provide a method for installing sensor components.

[0006] The stress sensor assembly of this invention includes a sensor body, a positioning rod, an elastic sleeve, a fluid anchoring agent layer, and a deformation support.

[0007] The sensor body is inserted into the borehole. The positioning rod extends along a first direction, and one end of the positioning rod is connected to the sensor body. The positioning rod is positioned along the extension direction of the first direction. The elastic sleeve is sleeved on the positioning rod. The elastic sleeve has a first end and a second end that are opposite to each other along its extension direction. There is a gap between the elastic sleeve and the positioning rod. The first end of the elastic sleeve abuts against the sensor body. The elastic sleeve, the positioning rod, and the sensor body limit the accommodating cavity. The fluid anchoring agent layer fills the accommodating cavity. The deformable expansion member has an initial position and a compression position. The deformable expansion member is provided with a clearance guide. The positioning rod passes through the clearance guide. The deformable expansion member is movable relative to the positioning rod to rotate from the initial position to the compression position. In the initial position, the deformable expansion member rests on the second end of the elastic sleeve. In the compression position, the deformable expansion member contracts inside the elastic sleeve to deform the elastic sleeve.

[0008] The stress sensor assembly of this invention, by placing a fluid anchoring agent layer within a cavity formed by the elastic sleeve, the positioning rod, and the sensor body, allows the elastic sleeve to deform under the action of the deformable support member during installation. This causes the first end of the elastic sleeve to be opened and disengaged from the sensor body, allowing the fluid anchoring agent layer in the cavity to flow out from the first end and continue flowing downwards into the space between the borehole and the sensor body. After the fluid anchoring agent layer solidifies, the sensor body is fixed within the borehole, thus achieving the installation of the stress sensor assembly without the need for a hydraulic pump and grouting pipe (which requires additional grouting pumps, grouting pipelines, and grouting materials, involving long-distance transportation of materials and equipment, and necessitates water, electricity, or ventilation connections, material mixing, insertion of long-distance grouting pipes in the borehole, and retraction of the grouting pipes). Therefore, it has the advantages of simple structure and high construction convenience, significantly reducing the labor intensity of workers.

[0009] Therefore, the stress sensor assembly of the present invention has the advantages of simple structure and convenient construction.

[0010] In some embodiments, the deformable support includes a spring and a drive rod, one end of the drive rod is connected to the spring, and the other end of the drive rod extends out of the borehole in a direction away from the spring. A portion of the spring protrudes relative to the rest of the spring in a direction closer to the sensor body to form a protrusion, and the protrusion is provided with the avoidance guide portion.

[0011] In some embodiments, the spring sheet is provided with a plurality of through holes so that the fluid anchoring agent layer passes through the spring sheet during the process of the deformable expansion member changing from the initial position to the compression position.

[0012] In some embodiments, the spring sheet is provided with one of a limiting guide protrusion and a guide groove extending along the first direction, and the positioning rod is provided with the other of the limiting guide protrusion and the guide groove, wherein the limiting guide protrusion is movably disposed within the guide groove.

[0013] In some embodiments, the spring includes a hanging ring and a sliding rod, the hanging ring having a notch extending in a second direction, the drive rod abutting against the hanging ring, and the sliding rod being hung on the hanging ring to form the limiting guide protrusion, wherein the first direction is perpendicular to the second direction.

[0014] In some embodiments, the hanging ring includes a ring plate portion and a plurality of anti-tipping spikes, the notch is formed on the ring plate portion, the drive rod abuts against the ring plate portion, and the plurality of anti-tipping spikes are spaced apart and divergently arranged on the outer periphery of the ring plate portion.

[0015] In some embodiments, the outer diameter of the spring is 1.1 to 1.2 times the outer diameter of the elastic sleeve.

[0016] In some embodiments, the Shore hardness of the spring is greater than that of the elastic sleeve, wherein the Shore hardness of the elastic sleeve is 85-90HD and the Shore hardness of the spring is 92-95HD.

[0017] In some embodiments, the elastic sleeve is a rigid rubber sleeve.

[0018] In some embodiments, the drive rod includes a rod portion and a pressing ring portion, the pressing ring portion is disposed at one end of the rod portion, the pressing ring portion abuts against the spring piece, and the pressing portion is funnel-shaped.

[0019] In some embodiments, the rod portion includes multiple rod segments, which are detachably connected in a sequential direction with their ends joined together.

[0020] In some embodiments, the length of the drive rod is 5m-20m.

[0021] The method for installing a sensor assembly according to any one of the above embodiments involves pre-setting a fluid anchoring agent layer in the receiving cavity, placing the stress sensor assembly into the borehole, and using the deformable expansion member to expand the elastic sleeve so that the fluid anchoring agent layer in the receiving cavity flows into the borehole to achieve the installation of the stress sensor. Attached Figure Description

[0022] Figure 1 This is the assembly intention of the stress sensor assembly located inside the borehole in an embodiment of the present invention, with the deformable support member in its initial position.

[0023] Figure 2 This is the assembly intention of the stress sensor assembly located inside the borehole in an embodiment of the present invention, with the deformable support in a compressed position.

[0024] Figure 3 This is an assembly diagram of the stress sensor assembly located inside the borehole according to an embodiment of the present invention, and a schematic diagram of the removal of the drive rod.

[0025] Figure 4 This is a schematic diagram of the stress sensor assembly according to an embodiment of the present invention.

[0026] Figure 5 This is a structural schematic diagram of the deformable support member according to an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the structure of the spring sheet according to an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the hanging ring structure according to an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of the slide bar according to an embodiment of the present invention.

[0030] Figure label:

[0031] Stress sensor assembly 100; Drill hole 200;

[0032] Sensor body 1;

[0033] Positioning rod 2; guide groove 21;

[0034] Elastic sleeve 3; First end 31; Second end 32;

[0035] Fluid anchoring layer 4;

[0036] Deformable support 5; spring 51; hanging ring 511; ring plate 5111; anti-tipping spike 5112; protrusion 5113; clearance guide 5114; through hole 5115; notch 5116; slide rod 512; drive rod 52; rod 521; pressing ring 522;

[0037] Gap 6. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] The following is for reference. Figures 1-8 The stress sensor assembly 100 and the method for installing the sensor assembly according to an embodiment of the present invention are described.

[0040] The stress sensor assembly 100 of this invention includes a sensor body 1, a positioning rod 2, an elastic sleeve 3, a fluid anchoring agent layer 4, and a deformation support 5.

[0041] The sensor body 1 is inserted into the drill hole 200, and the positioning rod 2 is positioned along the first direction (i.e., the extension direction of the drill hole 200, for example, ...). Figure 1 Extending in the vertical direction shown, one end of the positioning rod 2 is connected to the sensor body 1. The positioning rod 2 is arranged along the extension direction of the drill hole 200. The elastic sleeve 3 is sleeved on the positioning rod 2. The elastic sleeve 3 has a first end 31 (e.g., in the direction of extension) that is opposite to the positioning rod 2. Figure 1 (as shown below) and the second end 32 (e.g., Figure 1 (As shown above), the elastic sleeve 3 and the positioning rod 2 have a gap 6. The first end 31 of the elastic sleeve 3 abuts against the sensor body 1. The elastic sleeve 3, the positioning rod 2, and the sensor body 1 limit the accommodating cavity. The fluid anchoring agent layer 4 fills the accommodating cavity. The deformable expansion member 5 has an initial position and a compression position. The deformable expansion member 5 is provided with a clearance guide 5114. The positioning rod 2 passes through the clearance guide 5114. The deformable expansion member 5 is movable relative to the positioning rod 2 so that the deformable expansion member 5 can be rotated from the initial position to the compression position (e.g., above). Figure 1 As shown in the diagram, in the initial position, the deformable support 5 rests on the second end 32 of the elastic sleeve 3, and in the compression position (e.g., Figure 2 As shown in the figure, the deformable support 5 contracts inside the elastic sleeve 3 to deform the elastic sleeve 3.

[0042] The stress sensor assembly 100 of this invention, by placing a fluid anchoring agent layer 4 in the receiving cavity formed by the elastic sleeve 3, the positioning rod 2, and the sensor body 1, allows the elastic sleeve 3 to deform under the action of the deformation support 5 during installation. This causes the first end 31 of the elastic sleeve 3 to be opened and disengaged from the sensor body 1, allowing the fluid anchoring agent layer 4 in the receiving cavity to flow out from the first end 31 and continue to flow downwards along the sensor body 1 between the borehole 200 and the sensor body 1. After the fluid anchoring agent layer 4 solidifies, the sensor body 1 is fixed in the borehole 200, thus realizing the installation of the stress sensor assembly 100 without the need for a hydraulic pump and grouting pipe (using a grouting pump requires additional grouting pumps, grouting pipelines, and grouting materials, involving long-distance transportation of materials and equipment. The equipment also requires water and electricity connections, material mixing, and the insertion and retraction of long-distance grouting pipes in the borehole 200). Therefore, the stress sensor assembly 100 of this invention has the advantages of simple structure and high construction convenience, which greatly reduces the labor intensity of workers.

[0043] Therefore, the stress sensor assembly 100 of this embodiment has the advantages of simple structure and convenient construction.

[0044] It should be noted that the first direction refers to the extension direction of the drill hole 200. In practical applications, the first direction can be... Figure 1 The vertical direction shown can be either horizontal or inclined.

[0045] For example, when the borehole 200 is inclined from at least the top, the fluid anchoring agent layer 4, after flowing out of the receiving cavity, can further flow into the gap between the borehole 200 and the sensor body 1, thereby fixing the sensor body 1 circumferentially and at the bottom. Therefore, the stress sensor assembly 100 of this embodiment of the invention has the advantage of good structural stability.

[0046] The distance between the drill hole 200 and the sensor body 1 can be 2mm-10mm.

[0047] The spacing between the drill holes 200 of the elastic sleeve 3 can be 4mm-12mm.

[0048] The volume of the receiving cavity can be 100mL-200mL.

[0049] The fluid anchoring agent layer is a slow-speed resin anchoring agent for mining.

[0050] Optionally, the sensor body 1 has a limiting groove on the surface that mates with the elastic sleeve 3 to ensure a tight seal of the receiving cavity in the initial position. Alternatively, the elastic sleeve 3 can be glued to the sensor body 1.

[0051] For example, Figure 1 As shown, the inner wall surface of the elastic sleeve 3, the outer wall surface of the positioning rod 2, and the upper surface of the sensor body 1 limit the accommodating cavity.

[0052] like Figure 1 , Figure 5 and Figure 6 As shown, the deformable support 5 includes a spring piece 51 and a drive rod 52. One end of the drive rod 52 is connected to the spring piece 51, and the other end of the drive rod 52 extends out of the drill hole 200 in a direction away from the spring piece 51. A portion of the spring piece 51 protrudes relative to the rest of the spring piece 51 in a direction closer to the sensor body 1 to form a protrusion 5113. The protrusion 5113 is provided with an avoidance guide portion 5114.

[0053] The stress sensor assembly 100 of this embodiment of the invention, by dividing the deformable expansion member 5 into a spring piece 51 and a driving rod 52, and relying on the driving rod 52 to drive the spring piece 51 to move between its initial position and the compression position, has the advantage of simple structure. Furthermore, a portion of the spring piece 51 protrudes relative to the rest of the spring piece 51 towards the sensor body 1 to form a protrusion 5113, which has the advantage of facilitating deformation at the protrusion 5113. Therefore, the stress sensor assembly 100 of this embodiment of the invention prevents the spring piece 51 from becoming misaligned, thereby affecting the expansion effect on the elastic sleeve 3.

[0054] like Figure 6 and Figure 7 As shown, the spring sheet 51 is provided with multiple through holes 5115 so that the fluid anchoring agent layer 4 can pass through the spring sheet 51 during the process of the deformation expansion member 5 changing from the initial position to the compression position.

[0055] The stress sensor assembly 100 of this embodiment of the invention has multiple through holes 5115 on the spring piece 51. During the movement of the spring piece 51, the fluid anchoring agent layer 4 flows into the side of the spring piece 51 opposite to the sensor body 1 through the through holes 5115. Therefore, during the movement of the spring piece 51, the fluid anchoring agent layer 4 will not be squeezed, preventing excessive pressure in the cavity and the problem of the fluid anchoring agent layer 4 splashing. In addition, the fluid anchoring agent layer 4 is prevented from causing resistance to the spring piece 51, reducing the driving force on the drive rod 52. Thus, the stress sensor assembly 100 of this embodiment of the invention has the advantages of saving time and effort.

[0056] Optionally, the spring piece 51 is a highly elastic thin iron grate. This results in a simple structure that requires no special processing or manufacturing, reducing the construction cost of the sensor assembly installation method.

[0057] like Figure 1 and Figure 6 As shown, the spring piece 51 has one of a limiting guide protrusion and a guide groove 21 extending in the first direction, and the positioning rod 2 has the other of the limiting guide protrusion and the guide groove 21. The limiting guide protrusion is movably disposed in the guide groove 21. In other words, the spring piece 51 has a limiting guide protrusion and the positioning rod 2 has a guide groove 21; or, the spring piece 51 has a limiting guide protrusion extending in the first direction and the positioning rod 2 has a guide groove 21.

[0058] In the stress sensor assembly 100 of this embodiment, the spring piece 51 and the positioning rod 2 are guided and engaged by a limiting guide protrusion and a guide groove 21, which can improve the guiding mobility of the spring piece 51, thereby allowing the spring piece 51 to move along a predetermined path. This prevents the spring piece 51 from rotating due to uneven force during movement, which could affect the deformation of the elastic sleeve 3. Therefore, the stress sensor assembly 100 of this embodiment helps to improve the uniformity of the flow of the fluid anchoring agent layer 4 and the anchoring effect on the sensor body 1.

[0059] like Figures 6 to 8 As shown, the spring piece 51 includes a hanging ring 511 and a sliding rod 512. The hanging ring 511 has a notch 5116 extending in a second direction. The drive rod 52 abuts against the hanging ring 511, and the sliding rod 512 is hung on the hanging ring 511 to form a limiting guide protrusion. The first direction is perpendicular to the second direction. It can be understood that the notch 5116 on the hanging ring 511 extends radially along the hanging ring 511.

[0060] The stress sensor assembly 100 of this embodiment of the invention divides the spring piece 51 into a hanging ring 511 and a sliding rod 512. The sliding rod 512 is hung on the hanging ring 511 to form the limiting guide protrusion. During construction, the hanging ring 511 can be installed first, and then the sliding rod 512 can be installed. Therefore, the stress sensor assembly 100 of this embodiment of the invention has the advantage of simple structure.

[0061] Optionally, when the spring piece 51 is a high-elasticity thin iron grate, a notch 5116 is cut into the high-elasticity thin iron grate during construction, and the slide rod 512 is hung on the notch 5116 of the hanging ring 511 to form a limiting guide protrusion. Thus, the stress sensor assembly 100 of this embodiment of the invention has the advantages of simple structure, low manufacturing cost, and low cost.

[0062] like Figures 6 to 8 As shown, the hanging ring 511 includes a ring plate portion 5111 and a plurality of anti-tipping spikes 5112. A notch 5116 is formed on the ring plate portion 5111, and the drive rod 52 abuts against the ring plate portion 5111. The plurality of anti-tipping spikes 5112 are spaced apart and divergently arranged on the outer periphery of the ring plate portion 5111.

[0063] The stress sensor assembly 100 of this embodiment of the invention divides the hanging ring 511 into a ring plate portion 5111 and a plurality of anti-tipping spikes 5112. The plurality of anti-tipping spikes 5112 are spaced apart and diffusely arranged on the outer periphery of the ring plate portion 5111. During the process of the ring plate portion 5111 being moved between the initial position and the compression position by the drive rod 52, a portion of the anti-tipping spikes 5112 will pass through the elastic sleeve 3, which can prevent the ring plate portion 5111 from retracting from the compression position to the initial position, without having to continuously apply force to the drive rod 52. Thus, the stress sensor assembly 100 of this embodiment of the invention improves the convenience of manual operation.

[0064] The outer diameter of the spring piece 51 is 1.1 to 1.2 times the outer diameter of the elastic sleeve 3. This prevents the spring piece 51 from being too large, which would cause excessive resistance during its movement from the initial position to the compression position, while also preventing the spring piece 51 from being too small, which would result in insufficient expansion of the elastic sleeve 3 and excessively slow flow of the fluid anchoring agent layer 4. Therefore, the stress sensor assembly 100 of this embodiment of the invention combines the advantages of moderate resistance and moderate flow of the fluid anchoring agent layer 4.

[0065] The Shore hardness of the spring piece 51 is greater than that of the elastic sleeve 3.

[0066] Furthermore, the Shore hardness of the elastic sleeve 3 is 85-90HD, and the Shore hardness of the spring piece 51 is 92-95HD.

[0067] The elastic sleeve 3 is a rigid rubber sleeve. Therefore, the stress sensor assembly 100 of this embodiment of the invention has the advantage of low manufacturing cost.

[0068] like Figure 1 and Figure 5 As shown, the drive rod 52 includes a rod portion 521 and a pressing ring portion 522. The pressing ring portion 522 is disposed at one end of the rod portion 521 and abuts against the spring piece 51. The pressing portion is in the shape of a trumpet.

[0069] The stress sensor assembly 100 of this embodiment is divided into a rod portion 521 and a pressing ring portion 522 by a drive rod 52. The pressing ring portion 522 abuts against the spring piece 51, which can improve the uniformity of the force on the spring piece 51. Thus, the stress sensor assembly 100 of this embodiment prevents the problem of poor opening effect caused by the spring piece 51 being misaligned.

[0070] like Figure 1 and Figure 5 As shown, the pole 521 comprises multiple pole segments, which are detachably connected sequentially in the direction of their end-to-end connection. This improves the ease of installation and disassembly of the pole 521.

[0071] Furthermore, the length of the drive rod 52 is 5m-20m.

[0072] The method for installing the sensor assembly according to this embodiment of the invention involves drilling a predetermined hole 200 in the stress sensor assembly 100 according to any of the above claims, pre-setting the fluid anchoring agent layer 4 in the receiving cavity, and placing the stress sensor assembly 100 into the hole 200. For example... Figure 1 As shown, the elastic sleeve 3 is expanded by the deformable expander 5 to allow the fluid anchoring agent layer 4 in the receiving cavity to flow into the borehole 200, for example... Figure 2 As shown, the stress sensor is installed.

[0073] Therefore, the method for installing sensor components according to the present invention has the advantages of simple structure and high ease of construction.

[0074] Optionally, after installation, a portion of the deformable support 5 can be removed from the drilled hole 200. For example, Figure 3 The drive rod 52 is shown.

[0075] In the description of this invention, it should 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," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0079] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A stress sensor assembly, characterized in that, include: Sensor body, which is inserted into the borehole; A positioning rod extends along a first direction, one end of which is connected to the sensor body, and the positioning rod is positioned along the extension direction of the first direction; An elastic sleeve is sleeved outside the positioning rod. The elastic sleeve has a first end and a second end that are disposed opposite each other along its extension direction. The elastic sleeve and the positioning rod have a gap. The first end of the elastic sleeve abuts against the sensor body. The elastic sleeve, the positioning rod and the sensor body limit the accommodating cavity. A fluid anchoring agent layer, the fluid anchoring agent layer filling the receiving cavity; A deformable support member has an initial position and a compression position. The deformable support member is provided with a clearance guide portion. A positioning rod passes through the clearance guide portion. The deformable support member is movable relative to the positioning rod to rotate from the initial position to the compression position. In the initial position, the deformable support member rests on the second end of the elastic sleeve. In the compression position, the deformable support member contracts into the elastic sleeve to deform the elastic sleeve.

2. The stress sensor assembly according to claim 1, characterized in that, The deformable support includes a spring and a drive rod. One end of the drive rod is connected to the spring, and the other end of the drive rod extends out of the drill hole in a direction away from the spring. A portion of the spring protrudes relative to the rest of the spring in a direction closer to the sensor body to form a protrusion. The protrusion is provided with the avoidance guide.

3. The stress sensor assembly according to claim 2, characterized in that, The spring sheet is provided with multiple through holes so that the fluid anchoring agent layer can pass through the spring sheet during the process of the deformable expansion member changing from the initial position to the compression position.

4. The stress sensor assembly according to claim 2, characterized in that, The spring sheet is provided with one of a limiting guide protrusion and a guide groove extending along the first direction, and the positioning rod is provided with the other of the limiting guide protrusion and the guide groove, and the limiting guide protrusion is movably disposed in the guide groove.

5. The stress sensor assembly according to claim 4, characterized in that, The spring includes a hanging ring and a sliding rod. The hanging ring has a notch extending in a second direction. The drive rod abuts against the hanging ring. The sliding rod is hung on the hanging ring to form the limiting guide protrusion. The first direction is perpendicular to the second direction.

6. The stress sensor assembly according to claim 5, characterized in that, The hanging ring includes a ring plate portion and a plurality of anti-tipping spikes. The notch is formed on the ring plate portion, and the drive rod abuts against the ring plate portion. The plurality of anti-tipping spikes are spaced apart and divergently arranged on the outer periphery of the ring plate portion.

7. The stress sensor assembly according to claim 2, characterized in that, The outer diameter of the spring piece is 1.1 to 1.2 times the outer diameter of the elastic sleeve; And / or, the Shore hardness of the spring is greater than the Shore hardness of the elastic sleeve; And / or, the elastic sleeve is a rigid rubber sleeve.

8. The stress sensor assembly according to claim 2, characterized in that, The drive rod includes a rod portion and a pressing ring portion. The pressing ring portion is disposed at one end of the rod portion and abuts against the spring piece. The pressing ring portion is funnel-shaped.

9. The stress sensor assembly according to claim 8, characterized in that, The pole includes multiple pole segments, which are detachably connected in a sequential direction from end to end. And / or, the length of the drive rod is 5m-20m.

10. A method for installing a sensor assembly, characterized in that, The stress sensor assembly according to any one of claims 1-9 is installed by pre-setting a fluid anchoring agent layer in the receiving cavity, placing the stress sensor assembly into the borehole, and using the deformable expansion member to expand the elastic sleeve so that the fluid anchoring agent layer in the receiving cavity flows into the borehole.

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