Filled roadbed cavity bearing capacity dynamic detection device and working method thereof

Abstract

The invention relates to the field of roadbed parameter detection, in particular to a fill roadbed cavity bearing capacity dynamic detection device and a working method thereof.The fill roadbed cavity bearing capacity dynamic detection device comprises a supporting frame, a geological paving device fixedly arranged on the supporting frame and a bearing capacity detection device fixedly arranged on the supporting frame; a lifting rotating wheel is rotatably arranged on the peripheral side surface of the support frame; the technical problem that a detection result deviates due to the fact that the road surface is uneven or cavities exist below the ground before an existing roadbed bearing capacity detection device conducts detection is solved.

Description

Technical Field

[0001] The present invention relates to the field of roadbed parameter detection, and in particular to a dynamic detection device for the bearing capacity of a fill roadbed cavity and a working method thereof. Background Art

[0002] In response to the demand for dynamic detection of voids and bearing capacity of fill roadbed, modern detection devices mainly achieve efficient and accurate diagnosis through the integration of multiple technologies, combining cutting-edge technologies and engineering practices.

[0003] The principle of the dynamic deformation modulus testing device is to use a free-falling hammer to impact the load plate and record the dynamic deformation modulus Evd value of the roadbed. Its advantages are fast and efficient. The test time for a single point usually only takes 3-5 minutes, and the bearing capacity index can be output in real time.

[0004] However, the above-mentioned dynamic deformation modulus test device also has technical limitations when conducting tests. Its test results are easily affected by the flatness of the ground. If the test ground is uneven, such as gravel or soft geology, manual sand replenishment is required to ensure that the load plate is in full contact with the ground. Otherwise, it is easy to cause errors in the settlement measurement results. The invention patent of Chinese patent application No. 202410645433.6 discloses a roadbed bearing capacity detection device, including a base plate, the top of the base plate is fixedly connected to two symmetrically arranged support columns by bolts, the tops of the two support columns are commonly fixedly connected to a top plate by bolts, the top of the top plate is fixedly connected to a mounting plate by bolts, a hydraulic cylinder is installed on the top of the mounting plate, the output end of the hydraulic cylinder is fixedly connected to a push rod, through the arrangement of structures such as a counterweight block and a bearing plate, the interior of the counterweight block is a cavity, and the weight of the counterweight block can be changed by adding a weight block inside, thereby adjusting the falling weight, which is more convenient to use. Then, in order to conveniently lift the counterweight block through the connecting block, no manual push is required, and the operation is more convenient. Through the above technical solution, the problems of easy damage to the ground and inconvenient operation in the prior art are solved. The technical solution proposed by the above invention mainly avoids the technical problem of the device damaging the ground. In actual use, since the test ground is a random ground, the flatness of the ground cannot be guaranteed before the test. The general practice is that workers arrive at the test location in advance to manually flatten the ground, and then the device directly performs the test. On the one hand, this increases labor costs. On the other hand, there are also limitations when manually paving the ground, that is, it is impossible to fully guarantee that the paved ground is parallel to the horizontal plane only by judging with the naked eye. Summary of the Invention

[0005] Therefore, in response to the above problems, the present invention proposes a dynamic detection device for the bearing capacity of embankment voids and its working method, which solves the technical problem that the existing roadbed bearing capacity detection device may cause deviations in the detection results due to uneven road surface or voids under the ground before detection.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solution: a dynamic detection device for the bearing capacity of a void in a fill roadbed, comprising a support frame, a geological paving device fixedly mounted on the support frame, and a bearing capacity detection device fixedly mounted on the support frame, wherein the support frame is rotatably provided with a lifting wheel on its peripheral side surface; The geological paving device includes a first lower probe plate and a second lower probe plate that are symmetrically arranged with each other, and a first toggle rod and a second toggle rod that are respectively arranged on the first lower probe plate and the second lower probe plate. The first lower probe plate and the second lower probe plate are pre-inserted into the geological layer before the bearing capacity test of the roadbed cavity is performed, and the geological layer is laterally toggled by the first toggle rod and the second toggle rod to fill the cavity. The bearing capacity detection device includes a load plate, a sinking drop hammer used in conjunction with the load plate, a vibration sensor integrated in the load plate, and a settlement measuring instrument integrated on the peripheral side of the load plate.

[0007] Furthermore, the support frame includes an inner frame and an outer frame which are nested with each other, the lifting wheel is arranged on the outer frame, the geological paving device is arranged on the outer frame, and the bearing capacity detection device is arranged on the inner frame.

[0008] Furthermore, the inner frame and the outer frame are connected by a guide rail, and the inner frame and the outer frame are displaced in the vertical direction by the guide rail. The outer frame includes an outer frame and a supporting base plate that are fixedly connected.

[0009] Furthermore, the supporting base plate is a columnar structure with a U-shaped vertical cross-section, and two long strip troughs are symmetrically arranged on the supporting base plate, which are defined as the first trough and the second trough. The first lower probe plate and the second lower probe plate are respectively embedded in the first trough and the second trough, and are respectively raised and lowered in the vertical direction in the first trough and the second trough by driving motors. The free ends of the first lower probe plate and the second lower probe plate are both provided with reciprocating soil-moving structures for loosening the soil.

[0010] Furthermore, the reciprocating soil-moving structure includes a reciprocating chain and a reciprocating roller that cooperates with the reciprocating chain. The reciprocating roller reciprocates along the path defined by the reciprocating chain under the drive of the reciprocating chain. The outer circumferential side of the reciprocating roller is provided with moving teeth for engaging with the reciprocating chain and moving the soil.

[0011] Furthermore, the first toggle rod is arranged on the first lower probe plate at intervals along the vertical direction, and the second toggle rod is arranged on the second lower probe plate at intervals along the vertical direction. Both the first toggle rod and the second toggle rod can be rotated in the horizontal direction. The setting positions of the first toggle rod and the second toggle rod on the vertical plane are staggered with each other, and the two are independent of each other during the horizontal rotation process and do not affect each other.

[0012] Furthermore, the first toggle lever and the second toggle lever can both rotate 360° along their own axes by rotating the motor, and toggle protrusions are provided on the outer circumferential side surfaces of the first toggle lever and the second toggle lever, and the toggle protrusions are arranged at intervals.

[0013] Furthermore, a compaction cavity is provided in the load plate, and a first connecting hole and several second connecting holes are provided on the load plate, the first connecting hole passes through the compaction cavity and the upper surface of the load plate, the second connecting hole passes through the compaction cavity and the lower surface of the load plate, and a compaction structure is provided in the compaction cavity, the compaction structure includes a compaction plate provided in the compaction cavity, an elastic clamping block provided on the inner side wall of the compaction cavity, and an elastic protrusion provided on the bottom surface of the compaction cavity, and a clamping groove cooperating with the elastic clamping block is provided on the compaction plate, a first top column is provided on the upper surface of the compaction plate, the first top column extends through the first connecting hole to protrude from the upper surface of the load plate, and a second top column is provided on the lower surface of the compaction plate, and the second top column extends through the second connecting hole to be flush with the lower bottom surface of the compaction plate.

[0014] Furthermore, the horizontal area of the sinking drop weight is larger than the horizontal area of the first connecting hole.

[0015] A working method of a dynamic detection device for bearing capacity of a fill roadbed cavity comprises the following steps: S1, pre-positioning arrival; the dynamic detection device for the bearing capacity of the fill roadbed cavity moves to the designated target position, the lifting wheel is raised, and the support frame contacts the ground; S2, preparatory work for paving the geological layer to be tested; the inner and outer frames of the support frame produce relative displacement, the inner frame rises, and the outer frame sinks until it contacts the geological surface; the geological paving device starts working, and the first and second probe plates are inserted into the geological layer. During the insertion process, the reciprocating soil-moving structure works synchronously to loosen the soil; S3, paving operation of the geological layer to be tested; based on step S2, after the first lower probe plate and the second lower probe plate are inserted into the geological layer, the first toggle rod and the second toggle rod are rotated horizontally, wherein the first toggle rod and the second toggle rod are rotated in opposite directions until they are parallel to each other and perpendicular to the first lower probe plate and the second lower probe plate, respectively. At this time, the first lower probe plate, the second lower probe plate, the first toggle rod and the second toggle rod form a rectangular structure in a horizontal plane projection; S4. Geological compaction: Before the geological bearing capacity test, geological compaction is performed in advance. The load plate is sunk until it touches the ground. The sinking hammer performs free fall motion and strikes the load plate. The initial fall of the sinking hammer hits the first top column, which in turn forces the compaction plate to sink. The second top column extends out of the second connecting hole and inserts into the geological layer. After the movement, the geological layer covered by the load plate is compacted after the voids are eliminated. S5. Dynamic bearing capacity detection: Based on the compaction of the geology in step S4, dynamic bearing capacity detection is performed. The sinking hammer continues to rise and then freely falls to hit the load plate. The sinking hammer weighs 10 kg and freely falls to impact the load plate, generating a peak instantaneous load of 7.07 kN. The settlement of the load plate under the impact is then recorded, and the dynamic deformation modulus is automatically calculated using the formula Evd = 22.5 / s, where s is the settlement value.

[0016] By adopting the above technical solution, the beneficial effects of the present invention are: 1. Compared with the existing roadbed bearing capacity detection device, the present invention has the advantages of conducting geological paving and screening out the voids in the geological layer before detection, thereby improving the measurement accuracy during subsequent detection; the wheel body on the support frame in the present invention adopts a lifting wheel, and its lifting method adopts a rotary lifting. When the device needs to move, the lifting wheel rotates downward until it contacts the ground and moves. When the device reaches the preset position and needs to measure, the lifting wheel rotates upward until it separates from the ground, and the support frame contacts the ground; before carrying out the bearing capacity measurement, the geological paving device will pre-divide a processing measurement area in the area to be measured, and conduct geological paving and screening out the voids in the geological layer for the processing measurement area; specifically, the first and second probe plates in the geological paving device can be pre-inserted into the geological layer, and in order to overcome the resistance of the geological layer during the insertion process, a reciprocating soil-moving structure is provided in the first and second probe plates, and the rolling of the reciprocating roller can move the soil, which is convenient for the first and second probe plates to deeply move. and when the first and second probe plates are inserted into the geological layer, the first and second toggle rods are further cooperated to perform a horizontal cavity screening and removal operation on the geological layer. The first and second toggle rods are respectively arranged on the second and second probe plates, and the two rotate on the horizontal plane. Similarly, in order to overcome the movement resistance in the geological layer, the first and second toggle rods are arranged to rotate along their own axes. At the same time, toggle protrusions are provided on the outer circumferential surfaces of the two. The toggle protrusions cooperate with the rotating first and second toggle rods to also play a toggle role on the surrounding soil. At the same time, the rotation of the first and second toggle rods is a horizontal rotation. During the rotation process, it can screen and eliminate possible cavities in the geological layer within the rotation range. The principle of exclusion is to disturb and loosen the originally compact geological layer, and the loose soil will fill the cavity. The disturbed geological layer is in a loose state. When the originally existing cavities have been filled in this process, the geological layer is in a uniform texture state at this time.

[0017] 2. In the present invention, the geological layer with different textures and voids is pre-treated through vertical and horizontal disturbances to make it uniform and stable, and then its bearing capacity is tested by a bearing capacity detection device. The test also includes a pre-treatment stage, in which the structure of the load plate can realize pre-treatment and formal measurement. When the sinking hammer falls freely for the first time, the load plate originally placed on the loose geological layer is forced to press down on the geological layer, compacting the geological layer and restoring the state before the disturbance. At the same time, in this process, the compaction plate in the load plate is forced to sink, and the second top column moves downward to extend out of the compaction cavity and insert into the geological layer. This not only compacts the geological layer, but also improves the coordination between the load plate and the geological layer. Because in the subsequent bearing capacity test, in order to ensure the test accuracy, it is necessary not only to eliminate the possible voids in the upper part of the geological layer, but also to ensure that the load plate keeps sinking vertically without deviation as the sinking hammer continuously strikes during the test. Therefore, after the pre-treatment, the second top column is inserted downward into the geological layer to ensure that the coordination between the load plate and the geological layer is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the present invention when viewed from above; Figure 3 This is a schematic structural diagram of the first lower probe plate in the present invention; Figure 4 This is a schematic diagram of the structure of the second lower probe plate in the present invention; Figure 5 This is a schematic diagram of the working states of the first toggle lever and the second toggle lever of the present invention; Figure 6 This is a structural diagram of the bearing capacity detection device of the present invention; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 It is a flow chart of the working method of the present invention. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] See also Figures 1-8, the present invention provides a dynamic detection device for the bearing capacity of voids in a filled subgrade, which includes a support frame 1, a geological spreading device 3 fixedly arranged on the support frame 1, and a bearing capacity detection device 4 fixedly arranged on the support frame 1. An elevating wheel 2 is rotatably arranged on the circumferential side surface of the support frame 1; The geological spreading device 3 includes a first down-exploring plate 31 and a second down-exploring plate 32 which are symmetrically arranged, and a first shifting rod 311 and a second shifting rod 321 respectively arranged on the first down-exploring plate 31 and the second down-exploring plate 32. Before detecting the bearing capacity of the voids in the subgrade, the first down-exploring plate 31 and the second down-exploring plate 32 are pre-inserted into the geological layer, and the geological layer is laterally shifted by the first shifting rod 311 and the second shifting rod 321 to fill the voids; The bearing capacity detection device 4 includes a load plate 41, a sinking drop hammer 42 used in conjunction with the load plate 41, a vibration sensor integrated in the load plate 41, and a settlement measuring instrument integrated on the circumferential side surface of the load plate. The vibration sensor and the settlement measuring instrument are both well-known electronic components, and they are arranged on the load plate 41 in an integrated manner, which will not be elaborated here.

[0021] The support frame 1 includes an inner frame body 11 and an outer frame body 12 which are sleeved with each other. The elevating wheel 2 is arranged on the outer frame body 12, the geological spreading device 4 is arranged on the outer frame body 12, and the bearing capacity detection device 4 is arranged on the inner frame body 11; the inner frame body 11 and the outer frame body 12 are connected by guide rails, and the inner frame body 11 and the outer frame body 12 generate displacements in the vertical direction through the guide rails. The outer frame body 12 includes a fixedly connected outer frame and a support bottom plate 121. The support bottom plate 121 is a columnar structure with a rectangular cross-section in the vertical direction. Two long strip-shaped grooves are symmetrically arranged on the support bottom plate 121, defined as the first groove 122 and the second groove 123. The first down-exploring plate 31 and the second down-exploring plate 32 are respectively embedded in the first groove 122 and the second groove 123, and are respectively lifted and lowered in the first groove 122 and the second groove 123 along the vertical direction by a driving motor. Reciprocating soil-loosening structures 5 are arranged at the free ends of the first down-exploring plate 31 and the second down-exploring plate 32. The reciprocating soil-loosening structure 5 includes a reciprocating chain 51 and a reciprocating roller 52 that cooperates with the reciprocating chain 51. The reciprocating roller 52 reciprocates along the path defined by the reciprocating chain 51 under the drive of the reciprocating chain 51. A shifting tooth 521 for meshing with the reciprocating chain 51 and shifting the soil mass is arranged on the outer circumferential side surface of the reciprocating roller 52.

[0022] The first toggle lever 311 is vertically spaced apart on the first lower probe plate 31, and the second toggle lever 321 is vertically spaced apart on the second lower probe plate 32. Both the first toggle lever 311 and the second toggle lever 321 are horizontally rotatable. The first toggle lever 311 and the second toggle lever 321 are vertically staggered, and are independent of each other during horizontal rotation. Both the first toggle lever 311 and the second toggle lever 321 can be rotated 360° along their own axes by a rotating motor. The outer circumferential side surfaces of the first toggle lever 311 and the second toggle lever 321 are each provided with toggle protrusions 6, which are spaced apart.

[0023] A compaction cavity 411 is provided in the load plate 41, and a first connecting hole 412 and a plurality of second connecting holes 413 are provided on the load plate 41. The first connecting hole 412 passes through the compaction cavity 411 and the upper surface of the load plate 41, and the second connecting hole 413 passes through the compaction cavity 411 and the lower surface of the load plate 41. A compaction structure is provided in the compaction cavity 411, and the compaction structure includes a compaction plate 7 provided in the compaction cavity 411, an elastic clamping block 415 provided on the inner side wall of the compaction cavity 411, and a plurality of second connecting holes 413 provided on the inner side wall of the compaction cavity 411. 411 has an elastic protrusion 414 on the inner bottom surface, and the compacting plate 7 is provided with a clamping groove 73 cooperating with the elastic clamping block 415, and the upper surface of the compacting plate 7 is provided with a first top column 71, and the first top column 71 extends through the first connecting hole 412 to the upper surface protruding from the load plate 41, and the lower surface of the compacting plate 7 is provided with a second top column 72, and the second top column 72 extends through the second connecting hole 413 to be flush with the lower bottom surface of the compacting plate 7, and the horizontal plane area of the sinking drop hammer 42 is larger than the horizontal plane area of the first connecting hole 412, specifically three times as large.

[0024] This embodiment simultaneously proposes a working method of the above-mentioned device, a working method of a dynamic detection device for bearing capacity of a fill roadbed cavity, comprising the following steps: S1, pre-positioning arrival; the dynamic detection device for bearing capacity of fill roadbed cavity moves to the designated target position, the lifting wheel 2 is raised, and the support frame 1 contacts the ground; S2, pre-operation of paving the geological layer to be tested; the inner frame 11 and the outer frame 12 of the support frame produce relative displacement, the inner frame 11 rises, and the outer frame 12 sinks until it contacts the geological surface; the geological paving device 3 starts working, the first lower probe plate 31 and the second lower probe plate 32 are inserted into the geological layer, and the reciprocating soil excavation structure 5 works synchronously during the insertion process to perform the loosening operation; S3, paving operation of the geological layer to be tested; on the basis of step S2, after the first lower probe plate 31 and the second lower probe plate 32 are inserted into the geological layer, the first toggle rod 311 and the second toggle rod 321 are rotated horizontally, wherein the first toggle rod 311 and the second toggle rod 321 are rotated in opposite directions until they are parallel to each other and perpendicular to the first lower probe plate 31 and the second lower probe plate 32, respectively. At this time, the first lower probe plate 31, the second lower probe plate 32, the first toggle rod 311 and the second toggle rod 321 form a rectangular structure with a horizontal plane projection; S4. Geological compaction: Before the geological bearing capacity test, geological compaction is performed in advance. The load plate 41 sinks until it rests against the ground. The sinking hammer 42 performs free fall motion, striking the load plate 41. The initial fall of the sinking hammer 42 strikes the first top column 71, causing the compaction plate 7 to sink under force. The second top column 72 extends out of the second connecting hole 413 and penetrates the geological layer. After the movement, the geological layer covered by the load plate 41 is compacted after the voids are eliminated. S5. Dynamic bearing capacity detection: Based on the compaction of the geology in step S4, dynamic bearing capacity detection is performed. The sinking hammer 42 is further lifted and then freely falls to hit the load plate 41. The sinking hammer weighs 10 kg and freely falls to impact the load plate 41, generating a peak instantaneous load of 7.07 kN. The settlement of the load plate 41 under the impact is then recorded, and the dynamic deformation modulus is automatically calculated using the formula Evd=22.5 / s, where s is the settlement value.

[0025] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0026] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A dynamic detection device for bearing capacity of voids in fill roadbed, characterized by: It includes a support frame, a geological paving device fixedly arranged on the support frame, and a bearing capacity detection device fixedly arranged on the support frame, wherein the support frame is rotatably provided with a lifting wheel on its peripheral side surface; The geological paving device includes a first lower probe plate and a second lower probe plate that are symmetrically arranged with each other, and a first toggle rod and a second toggle rod that are respectively arranged on the first lower probe plate and the second lower probe plate. The first lower probe plate and the second lower probe plate are pre-inserted into the geological layer before the bearing capacity test of the roadbed cavity is performed, and the geological layer is laterally toggled by the first toggle rod and the second toggle rod to fill the cavity. The bearing capacity detection device includes a load plate, a sinking drop hammer used in conjunction with the load plate, a vibration sensor integrated in the load plate, and a settlement measuring instrument integrated on the peripheral side of the load plate.

2. The dynamic detection device for bearing capacity of voids in fill roadbed according to claim 1, characterized in that: The support frame includes an inner frame and an outer frame which are nested with each other, the lifting wheel is arranged on the outer frame, the geological paving device is arranged on the outer frame, and the bearing capacity detection device is arranged on the inner frame.

3. The dynamic detection device for bearing capacity of voids in fill roadbed according to claim 2, characterized in that: The inner frame and the outer frame are connected via guide rails, and the inner frame and the outer frame are displaced in a vertical direction via the guide rails. The outer frame includes an outer frame and a supporting base plate that are fixedly connected.

4. The dynamic detection device for bearing capacity of voids in fill roadbed according to claim 3, characterized in that: The supporting base plate is a columnar structure with a U-shaped vertical cross-section. Two long strip troughs are symmetrically arranged on the supporting base plate, which are defined as the first trough and the second trough. The first lower probe plate and the second lower probe plate are respectively embedded in the first trough and the second trough, and are respectively raised and lowered in the vertical direction in the first trough and the second trough by driving motors. The free ends of the first lower probe plate and the second lower probe plate are both provided with reciprocating soil-loosening structures for loosening the soil.

5. The dynamic detection device for bearing capacity of voids in fill roadbed according to claim 4, characterized in that: The reciprocating soil-moving structure includes a reciprocating chain and a reciprocating roller that cooperates with the reciprocating chain. The reciprocating roller reciprocates along the path defined by the reciprocating chain under the drive of the reciprocating chain. The outer circumferential side of the reciprocating roller is provided with moving teeth for engaging with the reciprocating chain and moving the soil.

6. The dynamic detection device for bearing capacity of voids in fill roadbed according to claim 4, characterized in that: The first toggle rod is arranged on the first lower probe plate at intervals along the vertical direction, and the second toggle rod is arranged on the second lower probe plate at intervals along the vertical direction. Both the first toggle rod and the second toggle rod can be rotated in the horizontal direction. The setting positions of the first toggle rod and the second toggle rod on the vertical plane are staggered with each other. During the horizontal rotation, the two are independent of each other and do not affect each other.

7. The dynamic detection device for bearing capacity of voids in fill roadbed according to claim 6, characterized in that: The first toggle lever and the second toggle lever can both rotate 360 degrees along their own axes by rotating the motor. The outer circumferential sides of the first toggle lever and the second toggle lever are both provided with toggle protrusions, and the toggle protrusions are arranged at intervals.

8. The dynamic detection device for bearing capacity of voids in fill roadbed according to claim 7, characterized in that: A compaction cavity is provided in the load plate, and a first connecting hole and several second connecting holes are provided on the load plate, the first connecting hole passes through the compaction cavity and the upper surface of the load plate, and the second connecting hole passes through the compaction cavity and the lower surface of the load plate, and a compaction structure is provided in the compaction cavity, and the compaction structure includes a compaction plate provided in the compaction cavity, an elastic clamping block provided on the inner side wall of the compaction cavity, and an elastic protrusion provided on the bottom surface of the compaction cavity, and a clamping groove cooperating with the elastic clamping block is provided on the compaction plate, and a first top column is provided on the upper surface of the compaction plate, and the first top column extends through the first connecting hole to protrude from the upper surface of the load plate, and a second top column is provided on the lower surface of the compaction plate, and the second top column extends through the second connecting hole to be flush with the lower bottom surface of the compaction plate.

9. The dynamic detection device for bearing capacity of voids in fill roadbed according to claim 8, characterized in that: The horizontal area of the sinking drop weight is larger than the horizontal area of the first communicating hole.

10. A method for operating the device for dynamic detection of bearing capacity of voids in fill roadbed according to claim 9, characterized in that: The following steps are involved: S1, pre-positioning arrival; the dynamic detection device for the bearing capacity of the fill roadbed cavity moves to the designated target position, the lifting wheel is raised, and the support frame contacts the ground; S2, preparatory work for paving the geological layer to be tested; the inner and outer frames of the support frame produce relative displacement, the inner frame rises, and the outer frame sinks until it contacts the geological surface; the geological paving device starts working, and the first and second probe plates are inserted into the geological layer. During the insertion process, the reciprocating soil-moving structure works synchronously to loosen the soil; S3, paving operation of the geological layer to be tested; based on step S2, after the first lower probe plate and the second lower probe plate are inserted into the geological layer, the first toggle rod and the second toggle rod are rotated horizontally, wherein the first toggle rod and the second toggle rod are rotated in opposite directions until they are parallel to each other and perpendicular to the first lower probe plate and the second lower probe plate, respectively. At this time, the first lower probe plate, the second lower probe plate, the first toggle rod and the second toggle rod form a rectangular structure in a horizontal plane projection; S4. Geological compaction: Before the geological bearing capacity test, geological compaction is performed in advance. The load plate is sunk until it touches the ground. The sinking hammer performs free fall motion and strikes the load plate. The initial fall of the sinking hammer hits the first top column, which in turn forces the compaction plate to sink. The second top column extends out of the second connecting hole and inserts into the geological layer. After the movement, the geological layer covered by the load plate is compacted after the voids are eliminated. S5. Dynamic bearing capacity detection: Based on the compaction of the geology in step S4, dynamic bearing capacity detection is performed. The sinking hammer continues to rise and then freely falls to hit the load plate. The sinking hammer weighs 10 kg and freely falls to impact the load plate, generating a peak instantaneous load of 7.07 kN. The settlement of the load plate under the impact is then recorded, and the dynamic deformation modulus is automatically calculated using the formula Evd = 22.5 / s, where s is the settlement value.

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