A highway subgrade settlement monitoring device

Abstract

This application relates to a roadbed settlement monitoring device, specifically within the technical field of roadbed settlement detection. The device includes a foundation settlement plate, guide rods, settlement magnetic rings, and a wing plate structure. Multiple sets of settlement magnetic rings are slidably fitted onto the outside of the guide rods. The wing plate structure is located within the layered roadbed and connected to the settlement magnetic rings. The wing plate structure allows the settlement magnetic rings to slide along the guide rods as the layered roadbeds settle. The guide rods are hollow, allowing a settlement meter probe to pass through and detect the position of each settlement magnetic ring. This application achieves dynamic expansion of the monitoring system as the roadbed is filled, with multiple connecting rods extending the guide rod layer by layer via threaded joints. Multiple sets of settlement magnetic rings are embedded in each fill layer through the wing plate structure and slide along the guide rods. The settlement meter probe detects changes in the magnetic ring position via the hollow guide rod. This allows the monitoring system to dynamically expand as the roadbed is filled, with the magnetic rings settling freely with each fill layer, directly acquiring layered settlement data. Simultaneously, the guide rods protect the internal probe channels.

Description

Technical Field

[0001] This application relates to the technical field of roadbed settlement detection, and in particular to a roadbed settlement monitoring device for highway embankments. Background Technology

[0002] In highway construction, settlement control is particularly important for high embankment roads due to their large fill volume and heavy load, and settlement is often uneven. In order to effectively monitor construction quality, predict post-construction settlement, and prevent potential problems, settlement monitoring needs to begin during the layered filling construction period.

[0003] Currently, the equipment widely used for roadbed settlement monitoring mainly consists of settlement plates and magnetic ring-type layered settlement meters. However, under the special working conditions of layered filling construction of high embankment roadbeds, these traditional devices have the following key problems that limit their effective application:

[0004] 1. Inability to dynamically adapt to the filling process: Traditional settlement pipes or settlement markers with magnetic rings usually need to be pre-embedded to the design depth in one go before or in the early stages of roadbed filling. This makes it impossible to easily lengthen the monitoring markers or add monitoring points at the height of newly added filling layers as the filling surface rises during subsequent layer-by-layer filling. The equipment structure does not have the ability to "grow" with the roadbed.

[0005] 2. Difficulty in achieving true layered settlement monitoring: The magnetic rings in one-time pre-embedded magnetic ring settlement meters are typically positioned at several fixed depths. This structure cannot immediately install a dedicated magnetic ring near the interface height of each newly filled layer after compaction to monitor the subsequent settlement of the soil in and below that layer. Therefore, it is impossible to conveniently and directly obtain the self-settlement data of each filled layer during subsequent construction and compaction; only the absolute displacement at a preset depth or the total settlement at the top can be measured.

[0006] The aforementioned problems make it difficult for existing equipment to provide real-time, effective, and especially layer-by-layer settlement monitoring data during the layered filling construction of high embankment subgrades, failing to meet the urgent needs for refined control of the construction process and research on settlement mechanisms. Therefore, there is an urgent need for a new type of subgrade settlement monitoring equipment that can overcome the above-mentioned deficiencies, especially one that can be dynamically installed and heightened as the filling progresses, effectively resist construction interference, and conveniently set monitoring points at the height of each filling layer. Utility Model Content

[0007] In order to enable dynamic installation and heightening during the filling process, effectively resist construction interference, and facilitate the setting of monitoring points at each filling layer height, this application provides a highway subgrade settlement monitoring device.

[0008] This application provides a highway subgrade settlement monitoring device, which adopts the following technical solution:

[0009] A roadbed settlement monitoring device includes a foundation settlement plate, guide rods, settlement magnetic rings, and a wing plate structure. The foundation settlement plate is embedded in the roadbed layer. The guide rods are vertically mounted on the foundation settlement plate and consist of multiple sets of connecting rods. The first connecting rod is perpendicular to the foundation settlement plate, and adjacent connecting rods are detachably connected by threaded joints. Multiple sets of settlement magnetic rings are slidably sleeved on the outside of the guide rods. The wing plate structure is set inside the layered roadbed and connected to the settlement magnetic rings. The wing plate structure is used to allow the settlement magnetic rings to slide on the guide rods as the layered roadbeds settle. The guide rods are hollow inside, allowing the settlement meter probe to pass through and detect the position of each settlement magnetic ring.

[0010] By adopting the above technical solution, the settlement plate is fixed to the subgrade layer, and the multi-section connecting rod is extended layer by layer through threaded joints. Multiple sets of settlement magnetic rings are embedded in each filling layer through the wing plate structure and slide along the guide rod. The settlement meter probe detects the position change of the magnetic ring through the hollow guide rod, realizing the dynamic expansion of the monitoring system with the subgrade filling. The magnetic ring settles freely with each filling layer, directly obtaining the layered settlement data. At the same time, the guide rod protects the internal probe channel.

[0011] Furthermore, a permanent magnet is embedded inside the settling magnetic ring, and the magnetic field direction of the permanent magnet is parallel to the axis of the guide rod.

[0012] By adopting the above technical solution, the magnetic field generated by the permanent magnet is parallel to the axis of the guide rod, thereby enhancing the sensitivity of the sedimentation meter probe to identify the sedimentation magnetic ring and improving the accuracy of sedimentation data measurement.

[0013] Furthermore, the wing structure includes:

[0014] A connecting ring is slidably mounted on a guide rod, and a placement groove is provided on the side of the connecting ring near the guide rod to facilitate the placement of a settling magnetic ring;

[0015] An annular wing plate is welded onto the outer wall of the connecting ring. The annular wing plate is used to increase the contact area between the connecting ring and the layered roadbed. Multiple sets of through holes are opened at intervals on the annular wing plate. The annular wing plate causes the settling magnetic ring to settle together with the layered roadbed.

[0016] By adopting the above technical solution, the connecting ring fixes the settlement magnetic ring through the placement groove, and the annular wing plate with through holes is welded to the outside of the connecting ring. This increases the contact area between the annular wing plate and the layered roadbed, while the through holes form a soil nail effect between the soil layer and the soil layer, ensuring that the settlement magnetic ring settles synchronously with the soil layer and improving the accuracy of the settlement magnetic ring in detecting the settlement of the layered roadbed.

[0017] Furthermore, the bottom of the annular wing plate is provided with multiple sets of ribs that are connected to the side wall of the connecting ring.

[0018] By adopting the above technical solution, the rib plate is used to enhance the compressive strength of the annular wing plate, prevent deformation caused by heavy machinery, and ensure that the settlement force is stably transmitted to the settlement magnetic ring.

[0019] Furthermore, the connecting ring is provided with a magnetic ring locking component for temporarily locking the connecting ring at a specified height of the guide rod. The magnetic ring locking component includes an annular clamp and a fastening bolt. The annular clamp is slidably connected to the connecting ring, and the fastening bolt is used to make the annular clamp hold the guide rod tightly. The magnetic ring locking component releases the lock on the settlement magnetic ring after the subgrade is filled in this layer.

[0020] By adopting the above technical solution, the fastening bolt drives the ring clamp to hold the guide rod, thereby fixing the connecting ring on the guide rod and accurately settling the initial height of the magnetic ring. After filling, the fastening bolt is rotated in the opposite direction to separate the ring clamp from the guide rod, thereby releasing the degree of freedom of the settling magnetic ring and avoiding constraining the actual settlement position.

[0021] Furthermore, a protective cover is detachably provided on the top of the guide rod, and the protective cover can be connected to the top of any set of connecting rods. A sealing ring with an interference fit to the hollow top of the guide rod is provided at the bottom of the protective cover.

[0022] By adopting the above technical solution, the protective cover can be detachably connected to the top of any set of connecting rods, thereby preventing the backfill soil from blocking the hollow channel of the guide rod, protecting the integrity of the probe path, and facilitating quick opening of the cover for testing.

[0023] Furthermore, the outer wall of the guide rod is provided with scale lines to facilitate the installation of multiple sets of settling magnetic rings.

[0024] By adopting the above technical solution, the installation height of the settling magnetic ring can be easily and intuitively located through the scale lines on the guide rod, reducing manual measurement errors.

[0025] Furthermore, a sliding layer is provided on the outer surface of the guide rod to reduce the friction between the settling magnetic ring and the guide rod.

[0026] By adopting the above technical solution, the slip layer significantly reduces the frictional resistance between the settlement magnetic ring and the guide rod, prevents soil compression from causing jamming, and ensures the authenticity of settlement location data.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] By burying foundation settlement plates and first guide rods from the bottom layer, and then, after each layer of subgrade is compacted, a settlement magnetic ring with a wing plate structure is fitted onto the guide rod at the top surface of that layer and temporarily fixed with a magnetic ring locking device. The soil around the wing plate structure is then compacted, and the magnetic ring is unlocked to allow it to settle freely. The guide rod is then extended and protected with a protective cover. This process is repeated until the top layer is reached. Finally, the settlement data of each layer is obtained by detecting the positional changes of each settlement magnetic ring in the hollow channel of the guide rod using a settlement meter probe. This method achieves dynamic installation and heightening as the filling process progresses, effectively resists construction interference, and allows for convenient setting of monitoring points at the height of each filling layer. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of the roadbed settlement detection equipment of this application;

[0030] Figure 2 yes Figure 1 Enlarged diagram of section A in the middle;

[0031] Figure 3 This is a cross-sectional view of the roadbed settlement detection equipment of this application, showing the roadbed settlement detection equipment installed inside the roadbed;

[0032] Figure 4 yes Figure 3 Enlarged schematic diagram of section B.

[0033] Reference numerals in the attached drawings: 1. Foundation settlement plate; 2. Guide rod; 21. Connecting rod; 3. Settlement magnetic ring; 4. Wing plate structure; 41. Connecting ring; 411. Placement groove; 42. Annular wing plate; 421. Through hole; 43. Rib plate; 5. Magnetic ring locking component; 51. Annular clamp; 52. Fastening bolt; 6. Protective cover; 61. Sealing ring. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0035] This application discloses a roadbed settlement monitoring device.

[0036] Reference Figure 1 and Figure 2A roadbed settlement monitoring device includes a foundation settlement plate 1, a guide rod 2, settlement magnetic rings 3, and a wing structure 4. The foundation settlement plate 1 is embedded in the subgrade layer. The guide rod 2 is vertically installed on the foundation settlement plate 1 and is composed of multiple sets of connecting rods 21. The first connecting rod 21 is perpendicular to the foundation settlement plate 1, and adjacent connecting rods 21 are detachably connected. Multiple sets of settlement magnetic rings 3 are slidably sleeved on the outside of the guide rod 2. The wing structure 4 is installed in the layered subgrade and connected to the settlement magnetic rings 3. The wing structure 4 is used to allow the settlement magnetic rings 3 to slide on the guide rod 2 as the layered subgrade settles. The guide rod 2 is hollow inside, allowing the settlement meter probe to pass through and detect the position of each settlement magnetic ring 3.

[0037] Reference Figure 1 and Figure 3 The adjacent connecting rods 21 are detachably connected by threaded joints; the guide rod 2 formed by them is hollow inside, and the inner diameter of the guide rod 2 is larger than the outer diameter of the settlement meter probe, so that the settlement meter probe can slide freely along the inside of the guide rod 2; the outer wall of the guide rod 2 is laser-engraved with scale lines, the zero point of which corresponds to the mounting surface of the foundation settlement plate 1, and the scale lines on multiple sets of connecting rods 21 are interconnected to facilitate recording the initial installation height of the settlement magnetic ring 3; a sliding layer is provided on the outer surface of the guide rod 2 to reduce the friction between the settlement magnetic ring 3 and the guide rod 2, and the sliding layer is made of polytetrafluoroethylene or ultra-high molecular weight polyethylene spraying; the scale lines in this embodiment are short and in a concave state, thereby ensuring that the settlement magnetic ring 3 slides on the guide rod 2.

[0038] Reference Figure 3 The settlement magnetic ring 3 has a ring-shaped structure and is slidably sleeved on the outside of the guide rod 2, so that the settlement magnetic ring 3 slides along the axis of the guide rod 2. A permanent magnet is embedded inside the settlement magnetic ring 3, and the magnetic field direction of the permanent magnet is parallel to the axis of the guide rod 2. Multiple sets of settlement magnetic rings 3 are arranged at intervals on the guide rod 2. The multiple sets of settlement magnetic rings 3 are located in each layer of roadbed, so that the settlement magnetic rings 3 slide on the guide rod 2 as each layer of roadbed settles. By inserting the settlement meter probe into the guide rod 2, the position of the multiple sets of settlement magnetic rings 3 on the guide rod 2 can be detected, and finally the settlement of the multi-layer roadbed can be detected.

[0039] Reference Figure 1 and Figure 3 The wing structure 4 is set inside the layered roadbed and is connected to the settlement magnetic ring 3. The wing structure 4 increases the contact area so that when the layered roadbed settles, the settlement magnetic ring 3 is driven to slide on the guide rod 2 through the wing structure 4, and finally the settlement magnetic ring 3 settles with the layered roadbed.

[0040] Reference Figure 2 and Figure 4The wing structure 4 includes a connecting ring 41 and an annular wing plate 42. The connecting ring 41 is slidably installed on the outer wall of the guide rod 2. The connecting ring 41 has a placement groove 411 on the side near the guide rod 2 to facilitate the placement of the settlement magnetic ring 3, thereby reducing the probability of damage to the settlement magnetic ring 3 by the subgrade aggregate. The annular wing plate 42 is welded to the outer wall of the connecting ring 41. The annular wing plate 42 is used to increase the contact area between the connecting ring 41 and the layered subgrade, so that when the layered subgrade settles, it will cause the settlement magnetic ring 3 inside the connecting ring 41 to settle together. Multiple sets of through holes 421 are opened at intervals on the annular wing plate 42, so that the backfill soil on the top of the annular wing plate 42 can be squeezed into the holes and reach the bottom of the annular wing plate 42, forming a soil nailing effect, so that the annular wing plate 42 settles together with the layered subgrade.

[0041] Reference Figure 2 and Figure 4 Multiple sets of ribs 43 are welded and installed on the bottom of the annular wing plate 42. The adjacent side of the ribs 43 is welded and installed on the side wall of the connecting ring 41. The multiple sets of ribs 43 are used to improve the connection strength between the annular wing plate 42 and the connecting ring 41, thereby facilitating the movement of the settlement magnetic ring 3 when the layered roadbed settles.

[0042] Reference Figure 2 and Figure 4 The connecting ring 41 is provided with a magnetic ring locking component 5 for temporarily locking the settling magnetic ring 3 at a specified height on the guide rod 2. The magnetic ring locking component 5 includes an annular clamp 51 and a fastening bolt 52. The bottom of the annular clamp 51 is slidably installed on the top of the connecting ring 41 along the direction close to or away from the axis of the guide rod 2, and the annular clamp 51 is sleeved on the guide rod 2. The fastening bolt 52 is rotatably installed on the annular clamp 51. When the fastening bolt 52 rotates, it drives the annular clamp 51 to move on the connecting ring 41. The ring slides and eventually abuts against the side wall of the guide rod 2. When it is necessary to lock the settlement magnetic ring 3 at a specified height on the guide rod 2, the fastening bolt 52 is rotated to make the annular clamp 51 abut against the side wall of the guide rod 2, thereby locking the connecting ring 41 onto the guide rod 2. In order to improve the clamping effect between the annular clamp 51 and the guide rod 2, anti-slip texture is provided on the side of the annular clamp 51 near the guide rod 2. After the subgrade of this layer is filled, the magnetic ring locking part 5 releases the lock on the settlement magnetic ring 3.

[0043] Reference Figure 4 A protective cover is detachably installed on the top of the guide rod 2. The protective cover can seal the top of each connecting rod 21. The bottom of the protective cover is threaded to the top of the connecting rod 21. A sealing ring 61 that is interference-fitted with the hollow top of the guide rod 2 is fixedly installed on the bottom of the protective cover, so that the protective cover is sealed and detachably installed on the top of the guide rod 2.

[0044] Reference Figures 1-4Specifically, a foundation pit is excavated on the compacted subgrade layer, and a foundation settlement plate 1 is installed. The first guide rod 2 is vertically installed on the center of the settlement plate, with the top of the rod 30 cm above the fill surface. The verticality of the guide rod 2 is calibrated using a total station, and then the protective cover 6 is installed on the top of the guide rod 2. After the Nth layer of subgrade is filled and compacted, the working surface around the guide rod 2 is cleaned, the settlement magnetic ring 3 is installed inside the connecting ring 41, and the connecting ring 41 is fitted onto the guide rod 2. The position of the magnetic ring is adjusted so that the top of the connecting ring 41 is aligned with the guide rod 2. Align the scale lines of guide rod 2 so that the settlement magnetic ring 3 is aligned with the design elevation of the Nth layer of subgrade. Then tighten the fastening bolt 52 so that the ring clamp 51 grips the guide rod 2. Manually cover and compact the annular wing plate 42 with soil to ensure that the soil is embedded in the through hole. After it is completely compacted, rotate the fastening bolt 52 to release the lock between the annular clamp 51 and the guide rod 2. Then install a new connecting rod 21 above the guide rod 2 and cover it with the protective cover 6 to fill the next layer of soil and compact it.

[0045] Reference Figure 3 When collecting settlement data, the protective cover 6 is removed, the settlement meter probe is inserted into the guide rod 2, and the settlement meter probe descends at a constant speed along the axis of the guide rod 2. When the settlement meter probe passes through the settlement magnetic ring 3, the Hall sensor captures the peak value of the axial magnetic field and records the depth of the settlement meter probe corresponding to the peak value. Finally, the settlement meter probe descends continuously and the position of each settlement magnetic ring 3 is recorded in sequence to obtain the settlement value of each layer of roadbed.

[0046] The working principle of this application embodiment is as follows:

[0047] Starting from the bottom layer, the foundation settlement plate 1 and the first guide rod 2 are buried. After each layer of subgrade is compacted, the settlement magnetic ring 3 with wing plate structure 4 is put on the guide rod 2 at the top surface of the layer and temporarily fixed by the magnetic ring locking piece 5. The soil around the wing plate structure 4 is compacted, and then the settlement magnetic ring 3 is unlocked to allow it to settle freely. The guide rod 2 is extended and protected by the protective cover 6. This process is repeated until the top layer. Finally, the settlement data of each layer is obtained by detecting the position change of each settlement magnetic ring 3 in the hollow channel of the guide rod 2 through the settlement meter probe. In the end, the dynamic installation and heightening with the filling process is realized, which can effectively resist construction interference and conveniently set monitoring points at the height of each filling layer.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A roadbed settlement monitoring device, characterized in that: The system includes a foundation settlement plate (1), a guide rod (2), a settlement magnetic ring (3), and a wing plate structure (4). The foundation settlement plate (1) is buried on the subgrade layer. The guide rod (2) is vertically set on the foundation settlement plate (1). The guide rod (2) is composed of multiple sets of connecting rods (21). The first connecting rod (21) is perpendicular to the foundation settlement plate (1). Adjacent connecting rods (21) are detachably connected. Multiple sets of settlement magnetic rings (3) are slidably sleeved on the outside of the guide rod (2). The wing plate structure (4) is set in the layered subgrade and connected to the settlement magnetic rings (3). The wing plate structure (4) is used to allow the settlement magnetic rings (3) to slide on the guide rod (2) as the layered subgrade settles. The guide rod (2) is hollow inside and allows the settlement meter probe to pass through and detect the position of each settlement magnetic ring (3).

2. The roadbed settlement monitoring device according to claim 1, characterized in that: The settling magnetic ring (3) is embedded with a permanent magnet, and the magnetic field direction of the permanent magnet is parallel to the axis of the guide rod (2).

3. The roadbed settlement monitoring device according to claim 2, characterized in that: The wing structure (4) includes: Connecting ring (41), the connecting ring (41) is slidably disposed on the guide rod (2), and the connecting ring (41) has a placement groove (411) on the side of the guide rod (2) to facilitate the placement of the sinking magnetic ring (3). The annular wing plate (42) is welded to the outer wall of the connecting ring (41). The annular wing plate (42) is used to increase the contact area between the connecting ring (41) and the layered roadbed. Multiple sets of through holes (421) are opened at intervals on the annular wing plate (42). The annular wing plate (42) causes the settling magnetic ring (3) to settle together with the layered roadbed.

4. The roadbed settlement monitoring device according to claim 3, characterized in that: The bottom of the annular wing plate (42) is provided with multiple sets of ribs (43) that are connected to the side wall of the connecting ring (41).

5. The roadbed settlement monitoring device according to claim 3, characterized in that: The connecting ring (41) is provided with a magnetic ring locking component (5) for temporarily locking the connecting ring (41) at a specified height of the guide rod (2). The magnetic ring locking component (5) includes an annular clamp (51) and a fastening bolt (52). The annular clamp (51) is slidably connected to the connecting ring (41). The fastening bolt (52) is used to make the annular clamp (51) hold the guide rod (2). The magnetic ring locking component (5) releases the lock on the settlement magnetic ring (3) after the subgrade is filled.

6. The roadbed settlement monitoring device according to claim 1, characterized in that: The top of the guide rod (2) is detachably provided with a protective cover (6), which can be connected to the top of any set of connecting rods (21). The bottom of the protective cover (6) is provided with a sealing ring (61) that is interference-fitted with the hollow top of the guide rod (2).

7. The roadbed settlement monitoring device according to claim 6, characterized in that: The guide rod (2) has scale lines on its outer side wall, which facilitates the installation of multiple sets of settling magnetic rings (3).

8. The roadbed settlement monitoring device according to claim 3, characterized in that: The outer surface of the guide rod (2) is provided with a sliding layer for reducing the friction between the settling magnetic ring (3) and the guide rod (2).

Images