Roadbed arch stress measuring device and measuring method

Abstract

This invention provides a roadbed camber stress measuring device and method, relating to the field of roadbed camber stress measurement technology. It includes a base positioning component with two expansion limiting components installed at its bottom; these two expansion limiting components are used for hole enlargement; a firm verification component is installed inside the base positioning component; the firm verification component is used for elastically pushing the base positioning component; a measurement guide component is installed at the top of the base positioning component; a measurement compensation component is installed on the measurement guide component; the measurement compensation component is used to compensate for roadbed settlement. The measurement compensation component can be used to compensate for roadbed settlement. Because roadbed soil with strong rheological properties may settle first and then camber, if the roadbed settles first, the height of the settlement will cause a lack of camber monitoring, affecting the comprehensiveness of data monitoring. This invention solves the problem that current roadbed camber stress measuring devices are difficult to achieve firm monitoring of the anchoring end and are not convenient for automatically compensating for roadbed settlement.

Description

Technical Field

[0001] This invention relates to the field of roadbed arch stress measurement technology, and in particular to a roadbed arch stress measurement device and measurement method. Background Technology

[0002] In actual complex soil subgrade construction, when the subgrade soil has strong rheological properties, it is prone to arching deformation due to factors such as humidity. When the subgrade arches, it will generate a large jacking stress on the concrete pavement. If not dealt with in time, it can easily cause the concrete pavement to bulge, directly affecting the safety of the concrete pavement. At present, the measurement of subgrade arching stress is mainly carried out by anchoring rods in conjunction with anchor rod-specific force gauges. However, it is difficult to achieve firm monitoring of the anchoring end using traditional anchoring rods. Once the anchoring end slips, it will directly affect the accuracy of stress detection. At the same time, the subgrade settlement and arching are uncontrollable. Traditional force gauges are not convenient for automatically compensating for possible subgrade settlement when measuring stress. Once the subgrade settles, it will be difficult to detect changes in subgrade arching stress in a timely manner, resulting in a lack of monitoring. Summary of the Invention

[0003] This disclosure relates to a roadbed arching stress measuring device to solve the problems that current roadbed arching stress measuring devices are difficult to achieve firm monitoring of the anchoring end and are not convenient for automatically compensating for roadbed settlement.

[0004] In a first aspect, this disclosure provides a roadbed camber stress measuring device and method, specifically including a base positioning component. Two expansion limiting components are installed at the bottom of the base positioning component; the two expansion limiting components are used for enlarging the hole; a firm verification component is installed inside the base positioning component; the firm verification component is used for elastically pushing the base positioning component; a measuring guide component is installed at the top of the base positioning component; a measuring compensation component is installed on the measuring guide component; the measuring compensation component is used to compensate for roadbed settlement; a pre-embedded component is installed on the measuring guide component; the base positioning component includes: a positioning rod, a guide cylinder, and an installation cylinder; the guide cylinder is fixedly sleeved on the bottom inner side of the positioning rod, and a hexagonal hole is provided in the middle of the guide cylinder; an installation cylinder is fixedly installed at the bottom end of the positioning rod; a thread is provided at the top of the positioning rod; and a wire groove is provided on the positioning rod.

[0005] In at least some embodiments, the base positioning component further includes: a positioning shaft and a positioning tension spring; two positioning shafts are slidably inserted into the mounting cylinder, and the two positioning shafts are offset from each other; a positioning tension spring is sleeved on each of the two positioning shafts; one end of the positioning tension spring is fixedly connected to the mounting cylinder, and the other end of the positioning tension spring is fixedly connected to the positioning shaft.

[0006] In at least some embodiments, the expansion limiting member includes: an expansion block and a positioning hole, two expansion blocks are rotatably mounted on the mounting cylinder; each of the two expansion blocks is provided with a drill tooth, and the drill teeth of the two expansion blocks are in opposite directions; the bottom of the drill teeth on the two expansion blocks are respectively a bevel structure; the two expansion blocks are inclined; each of the two expansion blocks is provided with a positioning hole; the two positioning holes are offset from each other.

[0007] In at least some embodiments, the expansion limiting member further includes: limiting protrusions, with limiting protrusions fixedly installed on the tops of the two expansion blocks respectively; the two limiting protrusions are respectively located inside the mounting cylinder; two positioning shafts are respectively used to insert into two positioning holes to position the two expansion blocks, and when the positioning shafts are inserted into the positioning holes, the expansion blocks are in an expanded state.

[0008] In at least some embodiments, the secure verification component includes: a pressure rod, a pressure spring, a switch post, and a guide post. The pressure rod is threaded into the interior of a positioning rod. A hexagonal hole is formed at the top of the pressure rod. The pressure spring is sleeved inside the positioning rod. The switch post is slidably sleeved inside the positioning rod. The bottom end of the pressure spring is fixedly connected to the top of the switch post, and the top end of the pressure spring is fixedly connected to the pressure rod. A guide post is fixedly installed at the bottom of the switch post, and the guide post has a hexagonal column structure. The guide post is slidably sleeved on a guide cylinder. The end of the guide post protrudes from the bottom of the mounting cylinder.

[0009] In at least some embodiments, the robust verification component further includes: a micro switch, which is fixedly mounted on the top of the switch post; and a pressure rod for pressing down the micro switch.

[0010] In at least some embodiments, the measuring guide includes: a threaded mounting sleeve and a reinforcing nut, wherein the threaded mounting sleeve has threads on its inner and outer sides respectively; the threaded mounting sleeve is threadedly connected to the positioning rod; the threaded mounting sleeve has two through slots; the reinforcing nut is threadedly connected to the outer side of the threaded mounting sleeve; and the top of the threaded mounting sleeve has an internal thread.

[0011] In at least some embodiments, the measuring compensation component includes: a pressure stud, a stop plate, and a torsion spring. The pressure stud is threadedly connected to a threaded mounting sleeve. The top of the pressure stud has a hexagonal hole. The bottom of the pressure stud is fixedly mounted with a stop plate. The stop plate is located inside the threaded mounting sleeve. A torsion spring is sleeved inside the threaded mounting sleeve. One end of the torsion spring is fixedly connected to the inside of the threaded mounting sleeve, and the other end of the torsion spring is fixedly connected to the stop plate. The torsion spring is in a compressed state.

[0012] In at least some embodiments, the embedded component includes: an outer sleeve, an inner slider, a pressure sensor, a rubber ring, a sealing cap, and a support bolt. The outer sleeve is located outside the threaded mounting sleeve. The inner slider is fixedly installed inside the outer sleeve by bolts. The inner slider is slidably sleeved inside the threaded mounting sleeve. The two sides of the inner slider pass through two through slots on the threaded mounting sleeve. A pressure sensor is fixedly connected to the top of the inner slider. A rubber ring is fixedly sleeved at the bottom of the outer sleeve, and the rubber ring is sleeved outside the positioning rod. A sealing cap is threaded to the top of the outer sleeve. A support bolt is threaded to the outer sleeve. The pressure sensor is electrically connected to a micro switch. A stop plate is located above the pressure sensor. The pressure sensor is externally connected to a display. A wire groove is provided on the outer sleeve.

[0013] Methods for measuring the arch stress on the roadbed:

[0014] 1) When the concrete pavement generates upward stress under the action of the roadbed jacking, the concrete pavement drives the pressure sensor on the outer sleeve and the inner slider to move upward together, squeezing the bottom of the stop plate (502).

[0015] 2) The pressure value is displayed on the external monitor of the pressure sensor. The staff records the data. When the data exceeds the standard, the roadbed is subjected to arch suppression construction.

[0016] This invention provides a device and method for measuring the arch stress on a roadbed, which has the following beneficial effects:

[0017] This invention employs an expansion limiting component, utilizing two inclined expansion blocks to facilitate the enlargement of the end of the anchoring hole. Combined with a positioning shaft, the expanded expansion block is positioned, achieving a limiting and positioning rod. This ensures the accuracy of subsequent stress measurements and avoids the limitations of traditional expansion anchoring structures that primarily rely on an expandable anchor head conforming to the anchoring hole wall for limiting. In rock layers where anchoring holes are relatively smooth, this makes it difficult to guarantee the anchoring and anti-loosening effect. A robust verification component is used for the elastic jacking guide cylinder, assisting in detecting the anchoring reliability of the expansion block to the anchoring hole, further preventing the expansion block from loosening and ensuring the accuracy of the upward arch stress measurement. Simultaneously, a microswitch is used to easily indicate expansion block loosening. Upon detection of loosening, the pressure sensor is automatically powered off, providing a warning and ensuring timely maintenance by personnel.

[0018] Furthermore, the use of pre-embedded components in conjunction with measuring compensation components facilitates real-time monitoring and measurement of the roadbed's arching stress, enabling timely suppression of the arching. Simultaneously, the measuring compensation components can compensate for roadbed settlement. Since roadbed soils with high rheological properties tend to settle before arching, if the roadbed settles first, the height of that settlement will result in a lack of monitoring of the arching, affecting the comprehensiveness of data monitoring. The measuring compensation components can be automatically controlled to be attached to the top of the inner slider in real-time for monitoring, ensuring real-time monitoring of the roadbed's arching and preventing the failure to promptly alert when the roadbed's arching pushes the concrete pavement to bulge or cause microcracks. Additionally, this structure can be directly embedded in the concrete pavement, resulting in a more compact design. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0020] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0021] In the attached diagram:

[0022] Figure 1 A schematic diagram of the overall structure of the roadbed arch stress measuring device of this application is shown;

[0023] Figure 2 A cross-sectional view of the roadbed arch stress measuring device of this application after installation in the roadbed is shown;

[0024] Figure 3 A schematic diagram of the base positioning component structure of this application is shown;

[0025] Figure 4 This application shows Figure 3 Enlarged view of the structure of region B in the middle;

[0026] Figure 5 A cross-sectional view of the expansion limiting member structure of this application is shown;

[0027] Figure 6 A schematic diagram of the robust verification component structure of this application is shown;

[0028] Figure 7 This application shows Figure 3 Enlarged view of the structure of region D in the middle;

[0029] Figure 8 A schematic diagram showing the mounting position of the inner slider in this application is provided;

[0030] Figure 9 A schematic diagram of the measurement guide structure of this application is shown;

[0031] Figure 10A schematic diagram of the measurement compensation component structure of this application is shown.

[0032] Figure 11 A cross-sectional view of the embedded part structure of this application is shown.

[0033] Figure 12 This application shows Figure 3 Enlarged view of the structure of region E in the middle.

[0034] The attached figures are labeled as follows:

[0035] 1. Base positioning component; 101. Positioning rod; 1011. Guide cylinder; 1012. Mounting cylinder; 102. Positioning shaft; 103. Positioning tension spring; 2. Expansion limiting component; 201. Expansion block; 2011. Positioning hole; 202. Limiting protrusion; 3. Secure verification component; 301. Downward pressure rod; 302. Downward pressure spring; 303. Switch post; 3031. Guide post; 304. Micro switch; 4. Measurement guide component; 401. Threaded mounting sleeve; 402. Reinforcing nut; 5. Measurement compensation component; 501. Downward pressure stud; 502. Stop plate; 503. Torsion spring; 6. Embedded component; 601. Outer sleeve; 6011. Inner slider; 6012. Pressure sensor; 602. Rubber ring; 603. Sealing cover; 604. Support bolt. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figures 1 to 12 :

[0038] This invention proposes a roadbed arch stress measuring device, comprising a base positioning component 1, with two expansion limiting components 2 installed at the bottom of the base positioning component 1; the two expansion limiting components 2 are used for hole enlargement; a firm verification component 3 is installed inside the base positioning component 1; the firm verification component 3 is used for elastically pushing the base positioning component 1; a measuring guide component 4 is installed at the top of the base positioning component 1; a measuring compensation component 5 is installed on the measuring guide component 4; the measuring compensation component 5 is used to compensate for roadbed settlement; a pre-embedded component 6 is installed on the measuring guide component 4; the base positioning component 1 includes: a positioning rod 101, a guide cylinder 1011, and an installation cylinder 1012, the guide cylinder 1011 is fixedly sleeved on the bottom inner side of the positioning rod 101, and a hexagonal hole is provided in the middle of the guide cylinder 101; the installation cylinder 1012 is fixedly installed at the bottom end of the positioning rod 101; the top of the positioning rod 101 is provided with a thread; the positioning rod 101 is provided with a wire groove for passing through a wire harness.

[0039] In this embodiment, the base positioning component 1 further includes: a positioning shaft 102 and a positioning tension spring 103. Two positioning shafts 102 are slidably inserted into the mounting cylinder 1012, and the two positioning shafts 102 are offset from each other. A positioning tension spring 103 is respectively sleeved on the two positioning shafts 102. One end of the positioning tension spring 103 is fixedly connected to the mounting cylinder 1012, and the other end of the positioning tension spring 103 is fixedly connected to the positioning shaft 102. The expansion limiting component 2 includes: an expansion block 201 and a positioning hole 2011. Two expansion blocks 201 are rotatably mounted on the mounting cylinder 1012. Drill teeth are respectively provided on the two expansion blocks 201. The drill teeth of the two expansion blocks 201 are oriented in opposite directions; the bottom of the drill teeth on the two expansion blocks 201 are respectively inclined; the two expansion blocks 201 are inclined; positioning holes 2011 are respectively opened on the two expansion blocks 201; the two positioning holes 2011 are offset from each other; the expansion limiting member 2 also includes: limiting protrusions 202, the tops of the two expansion blocks 201 are respectively fixedly installed with limiting protrusions 202; the two limiting protrusions 202 are respectively located inside the mounting cylinder 1012; the two positioning shafts 102 are respectively used to insert into the two positioning holes 2011 to position the two expansion blocks 201, and the positioning shafts 102 are inserted into When positioning hole 2011 is in place, expansion block 201 is in an expanded state. Using expansion limiting component 2, the expansion block 201 with two inclined surfaces facilitates the enlargement of the end of the anchoring hole. Combined with positioning shaft 102, the expanded expansion block 201 can be positioned, thus limiting and positioning rod 101. This ensures the accuracy of subsequent stress measurements and avoids the problem of traditional expansion anchoring structures that mainly rely on expandable anchor heads to fit against the anchoring hole wall for limiting. In rock layers where anchoring holes are relatively smooth, it is difficult to guarantee the anchoring and anti-detachment effect. This structure directly enlarges the end of the anchoring hole, forming a staggered layer, making operation simple and quick. Meanwhile, the automatic locking mechanism of the positioning shaft 102 further ensures the stability of the limit and prevents loosening, resulting in strong stability. Utilizing the design of the inclined surface structure at the bottom of the drill teeth on the expansion block 201, an outward expansion force is generated after being resisted by the rock at the bottom of the hole. At this time, the two expansion blocks 201 will gradually expand outward to enlarge the hole and achieve hole enlargement. As the two expansion blocks 201 expand, they will drive the positioning hole 2011 to gradually rotate and approach the positioning shaft 102. At this time, under the pull of the positioning tension spring 103, the positioning shaft 102 can be driven to insert into the positioning hole 2011, and the expansion block 201 will be positioned and maintained in the expanded state.

[0040] In this embodiment, the secure verification component 3 includes: a pressing rod 301, a pressing spring 302, a switch post 303, and a guide post 3031. The pressing rod 301 is threaded into the positioning rod 101; a hexagonal hole is formed at the top of the pressing rod 301; the pressing spring 302 is sleeved inside the positioning rod 101; the switch post 303 is slidably sleeved inside the positioning rod 101; the bottom end of the pressing spring 302 is fixedly connected to the top of the switch post 303, and the top end of the pressing spring 302 is fixedly connected to the pressing rod 301; the guide post 3031 is fixedly installed at the bottom of the switch post 303, and the guide post 3031 has a hexagonal column structure; the guide post 3031 is slidably sleeved on the guide cylinder 1011; the guide post 3031... The end of 31 protrudes from the bottom of the mounting cylinder 1012; the secure verification component 3 also includes: a micro switch 304, which is fixedly installed on the top of the switch column 303; the pressure rod 301 is used to press down the micro switch 304; the secure verification component 3 can be used to elastically push the guide cylinder 1011, assist in detecting the anchoring reliability of the expansion block 201 to the anchoring hole, further prevent the expansion block 201 from loosening, ensure the accuracy of the upward arch stress measurement, and at the same time, in conjunction with the micro switch 304, it can be convenient to indicate that the expansion block 201 is loose. When loosening is detected, the pressure sensor 6012 can be automatically controlled to cut off the power to provide a prompt, ensuring that the staff can carry out maintenance and other work in a timely manner, and avoid erroneous pressure data being directly recorded.

[0041] In Example 2, based on Example 1, the measuring guide 4 includes: a threaded mounting sleeve 401 and a reinforcing nut 402. The threaded mounting sleeve 401 has threads on both its inner and outer sides. The threaded mounting sleeve 401 is threadedly connected to the positioning rod 101. Two through slots are provided on the threaded mounting sleeve 401. The reinforcing nut 402 is threadedly connected to the outer side of the threaded mounting sleeve 401. The top of the threaded mounting sleeve 401 has an internal thread. The measuring compensation component 5 includes: a pressing stud 501, a stop plate 502, and a torsion spring 503. The pressing stud 501 is threadedly connected to the threaded mounting sleeve 401. The top of the pressing stud 501 has a hexagonal hole. The stop plate 502 is fixedly installed at the bottom of the pressing stud 501. The stop plate 502 is located at the screw... The inner side of the threaded mounting sleeve 401 is fitted with a torsion spring 503; one end of the torsion spring 503 is fixedly connected to the inner side of the threaded mounting sleeve 401, and the other end of the torsion spring 503 is fixedly connected to the stop plate 502; the torsion spring 503 is in a compressed state; the pressure sensor 6012 is connected to an external display; an HZC-H1 type pressure sensor 6012 and its matching display can be used; the embedded part 6 includes: an outer sleeve 601, an inner slider 6011, a pressure sensor 6012, a rubber ring 602, a sealing cover 603, and a support bolt 604. The outer sleeve 601 is provided with a wire passage groove for passing through the wire harness; the outer sleeve 601 is located outside the threaded mounting sleeve 401; the inner side of the outer sleeve 601 is fixed by bolts. An inner slider 6011 is installed; the inner slider 6011 is slidably sleeved inside the threaded mounting sleeve 401; the two sides of the inner slider 6011 pass through two through slots on the threaded mounting sleeve 401 respectively; a pressure sensor 6012 is fixedly connected to the top of the inner slider 6011; a rubber ring 602 is fixedly sleeved at the bottom of the outer sleeve 601, and the rubber ring 602 is sleeved on the outside of the positioning rod 101; a sealing cover 603 is threadedly connected to the top of the outer sleeve 601; a support bolt 604 is threadedly connected to the outer sleeve 601; the pressure sensor 6012 is electrically connected to a micro switch 304; a stop plate 502 is located above the pressure sensor 6012; the use of embedded parts 6 in conjunction with measuring compensation parts 5 facilitates real-time monitoring and measurement of the camber stress on the roadbed. The force facilitates timely suppression of roadbed bulging. Simultaneously, the measuring compensation component 5 can compensate for roadbed settlement. Due to the high rheological properties of roadbed soil, there is a tendency for settlement before bulging. If the roadbed settles first, the height of the settlement will cause a lack of bulging monitoring, affecting the comprehensiveness of data monitoring. The measuring compensation component 5 can automatically control and be attached to the top of the pressure sensor 6012 in real time for monitoring, ensuring real-time monitoring of roadbed bulging and preventing the failure to promptly alert when roadbed bulging pushes the concrete pavement to bulge or cause microcracks. Under the elastic drive of the torsion spring 503, the downward pressure stud 501 will spiral downward, causing the stop plate 502 to remain in contact with the top of the pressure sensor 6012 in real time.

[0042] Methods for measuring the arch stress on the roadbed:

[0043] 1) When the concrete pavement generates upward stress under the action of the roadbed jacking, the concrete pavement drives the pressure sensor 6012 on the outer sleeve 601 and the inner slider 6011 to move upward together, squeezing the bottom of the stop plate 502.

[0044] 2) The pressure value is displayed on the external display of the pressure sensor 6012. The staff records the data. When the data exceeds the standard, the roadbed is subjected to arch suppression construction work.

[0045] The working principle of this embodiment is as follows: When installing the positioning rod 101, a standard depth anchoring hole is first drilled on the roadbed. The end of the anchoring hole passes through the rheological layer and is drilled to a stable rock layer. Then, the positioning rod 101 is inserted into the anchoring hole. At this time, the top of the positioning rod 101 is aligned with the drill rod of the anchor drilling machine. The drilling machine controls the positioning rod 101 to move down and rotate. At this time, the drill teeth at the ends of the two expansion blocks 201 will press against the bottom of the anchoring hole. As it continues to move down and rotate, the bottom of the drill teeth on the expansion blocks 201 is inclined. The surface structure design, when subjected to the resistance of the rock at the bottom of the hole, generates an outward expansion force. At this time, the two expansion blocks 201 will gradually expand outward to enlarge the hole during drilling. As the two expansion blocks 201 expand, they will drive the positioning hole 2011 to gradually rotate and approach the positioning shaft 102. Then, under the pull of the positioning tension spring 103, the positioning shaft 102 can be driven to insert into the positioning hole 2011. At this time, the expansion blocks 201 will be positioned and maintained in the expanded state for stop positioning; this will ensure subsequent arch deformation detection. Precision; then the positioning rod 101 can be removed from the drill rod of the drilling rig. At this time, a wrench can be used to rotate the pressure rod 301 to compress the pressure spring 302, which elastically pushes the switch column 303, causing the guide column 3031 to abut against the bottom of the hole. As the pressure rod 301 continues to move downward, when the expansion block 201 stops in the anchoring hole, the positioning rod 101 is limited. At this time, the pressure rod 301 will press down the micro switch 304, and the micro switch 304 controls the pressure sensor 6012 to be energized, so that the stress can be normally measured. Conversely, if the expansion block 201 fails to expand effectively due to insufficient strength of the anchor hole wall, the positioning rod 101 will not be effectively limited. Under the elastic compression of the lower spring 302, the positioning rod 101 will move upward. At this time, the lower rod 301 will also move upward and will no longer compress the micro switch 304. The micro switch 304 can then control the pressure sensor 6012 to be de-energized. Staff need to perform timely maintenance operations. If necessary, the anchor hole needs to be re-established to avoid the potential for stress measurement failure.

[0046] Then, threaded mounting sleeve 401 is threaded onto the top of positioning rod 101, and rubber ring 602 is fitted onto the outside of positioning rod 101. The torsion spring 503 needs to be kept in a pre-tightened state. You can use a wrench to rotate the downward pressing stud 501 to move it upward, and then manually pull the outer sleeve 601 to drive the pressure sensor 6012 to abut against the bottom of the stop plate 502. Then you can manually rotate the support bolt 604 to support it on the roadbed surface for temporary limit support adjustment. Then you can carry out the subsequent road concrete pouring work, ensuring that the position of the outer sleeve 601 is stable during the curing process of the poured concrete, keeping the torsion spring 503 in a pre-tightened state, and leaving a margin for subsequent settlement compensation.

[0047] After the concrete pavement has cured, once the concrete pavement generates upward stress under the jacking action of the subgrade, the concrete pavement will cause the outer sleeve 601 and inner slider 6011 to move upward, squeezing the pressure sensor 6012. The pressure value can be displayed using the external display of the pressure sensor 6012. If the concrete pavement settles due to subgrade subsidence, which is difficult to detect visually, the outer sleeve 601 will also be moved downward. Under the elastic drive of the torsion spring 503, it will drive the downward pressure stud 501 to spiral downward, causing the stop plate 502 to keep in contact with the top of the pressure sensor 6012 in real time. At the same time, due to the self-locking property of the thread axial direction, the downward pressure stud 501 can only move downward in one direction, ensuring that the pressure sensor 6012 can be squeezed and measured as soon as the subgrade arches upward. Meanwhile, the torsion spring 503 has a small torque, which only plays the role of pre-tightening the elastic drive of the downward pressure stud 501, and will not cause excessive pressure when the pressure sensor 6012 is in contact with the inner slider 6011.

[0048] The following points should be noted in this article:

[0049] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0050] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0051] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A roadbed arch stress measuring device, comprising a base positioning component (1), wherein two expansion limiting components (2) are installed at the bottom of the base positioning component (1); characterized in that: The two expansion limiting members (2) are used to enlarge the hole; a firm verification member (3) is installed inside the base positioning member (1); the firm verification member (3) is used to elastically push the base positioning member (1); The base positioning component (1) is equipped with a measuring guide (4) on top; the measuring guide (4) is equipped with a measuring compensation component (5); the measuring compensation component (5) is used to compensate for roadbed settlement; The measuring guide (4) is equipped with a pre-embedded part (6); The base positioning component (1) includes: a positioning rod (101), a guide tube (1011), and a mounting tube (1012). The guide tube (1011) is fixedly sleeved on the bottom inner side of the positioning rod (101); the mounting tube (1012) is fixedly installed at the bottom end of the positioning rod (101). The expansion limiting component (2) includes: an expansion block (201) and a positioning hole (2011). Two expansion blocks (201) are rotatably mounted on the mounting cylinder (1012). Drill teeth are provided on each of the two expansion blocks (201). The bottom of the drill teeth on the two expansion blocks (201) are respectively inclined structures. Positioning holes (2011) are opened on each of the two expansion blocks (201). The expansion limiting member (2) further includes: a limiting protrusion (202), and the two expansion blocks (201) are respectively fixedly installed with the limiting protrusion (202); the two limiting protrusions (202) are respectively located inside the mounting cylinder (1012); when the positioning shaft (102) is inserted into the positioning hole (2011), the expansion block (201) is in an expanded state; The secure verification component (3) includes: a pressure rod (301), a pressure spring (302), a switch post (303), a guide post (3031), and a micro switch (304); the measurement guide component (4) includes: a threaded mounting sleeve (401) and a reinforcing nut (402); the measurement compensation component (5) includes: a pressure stud (501), a stop plate (502), and a torsion spring (503), wherein the pressure stud (501) is threadedly connected to the threaded mounting sleeve (401); one end of the torsion spring (503) is fixedly connected to the inside of the threaded mounting sleeve (401), and the other end of the torsion spring (503) is fixedly connected to the stop plate (502); the embedded component (6) includes: an outer sleeve (601), an inner slider (6011), a pressure sensor (6012), a rubber ring (602), a sealing cap (603), and a support bolt (604).

2. The roadbed arch stress measuring device according to claim 1, characterized in that, The base positioning component (1) further includes: a positioning shaft (102) and a positioning tension spring (103). Two positioning shafts (102) are slidably inserted into the mounting cylinder (1012). Positioning tension springs (103) are respectively sleeved on the two positioning shafts (102). One end of the positioning tension spring (103) is fixedly connected to the mounting cylinder (1012), and the other end of the positioning tension spring (103) is fixedly connected to the positioning shaft (102).

3. The roadbed arch stress measuring device according to claim 1, characterized in that, The pressure rod (301) is threaded inside the positioning rod (101); a pressure spring (302) is sleeved inside the positioning rod (101); a switch post (303) is slidably sleeved inside the positioning rod (101); the bottom end of the pressure spring (302) is fixedly connected to the top of the switch post (303), and the top end of the pressure spring (302) is fixedly connected to the pressure rod (301); a guide post (3031) is fixedly installed at the bottom of the switch post (303), and the guide post (3031) is a hexagonal column structure; the guide post (3031) is slidably sleeved on the guide cylinder (1011); the end of the guide post (3031) protrudes from the bottom of the mounting cylinder (1012).

4. The roadbed arch stress measuring device according to claim 1, characterized in that, The micro switch (304) is fixedly installed on the top of the switch post (303); the pressure rod (301) is used to press down the micro switch (304).

5. The roadbed arch stress measuring device according to claim 1, characterized in that, The threaded mounting sleeve (401) is threadedly connected to the positioning rod (101); the threaded mounting sleeve (401) has two through slots; a reinforcing nut (402) is threadedly connected to the outer side of the threaded mounting sleeve (401).

6. The roadbed arch stress measuring device according to claim 1, characterized in that, The top of the pressing stud (501) is provided with a hexagonal hole; a stop plate (502) is fixedly installed at the bottom of the pressing stud (501); the stop plate (502) is located inside the threaded mounting sleeve (401); a torsion spring (503) is sleeved inside the threaded mounting sleeve (401); the torsion spring (503) is in a compressed state.

7. The roadbed arch stress measuring device according to claim 1, characterized in that, The outer sleeve (601) is located outside the threaded mounting sleeve (401); an inner slider (6011) is fixedly installed on the inner side of the outer sleeve (601) by bolts; the inner slider (6011) is slidably sleeved on the inner side of the threaded mounting sleeve (401); the two sides of the inner slider (6011) pass through two through slots on the threaded mounting sleeve (401); a pressure sensor (6012) is fixedly connected to the top of the inner slider (6011); a rubber ring (602) is fixedly sleeved at the bottom of the outer sleeve (601), and the rubber ring (602) is sleeved on the outside of the positioning rod (101); a sealing cap (603) is threadedly connected to the top of the outer sleeve (601); a support bolt (604) is threadedly connected to the outer sleeve (601); the pressure sensor (6012) is electrically connected to a micro switch (304); and the stop plate (502) is located above the pressure sensor (6012).

8. A method for measuring the camber stress of a roadbed, using the roadbed camber stress measuring device as described in claim 1, characterized in that, The steps include: 1) When the concrete pavement generates upward stress under the jacking action of the subgrade, the concrete pavement drives the pressure sensor (6012) on the outer sleeve (601) and the inner slider (6011) to move upward together, squeezing the bottom of the stop plate (502); 2) The pressure value is displayed on the external display of the pressure sensor (6012), and the staff records the data. When the data exceeds the standard, the roadbed is subjected to arch suppression construction work.

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