Settlement detection device

Abstract

The utility model provides a settlement detection device which comprises a plurality of settlement detection units which are sequentially buried in a backfill soil layer from bottom to top and are movably connected with one another, each settlement detection unit comprises a settlement plate and a connecting cylinder assembly, a through hole is formed in the center of each settlement plate in a penetrating mode, and the bottom end of each connecting cylinder assembly is fixed in the corresponding through hole and can stretch out and draw back in the vertical direction. The settlement detection unit comprises a settlement plate and a through hole, the settlement plate is arranged at the bottom of the settlement detection unit, the connecting piece is detachably connected to the upper end of the connecting cylinder assembly and used for connecting adjacent settlement detection units in series, and the magnetic ring is arranged at the upper end of the settlement plate and is coaxial with the through hole. According to the utility model, the settlement detection units can be pre-buried layer by layer during the layered filling of the backfill soil without drilling and burying, the settlement plate and the magnetic ring synchronously settle with the soil layer, the settlement change of each soil layer can be detected in real time during the filling process, and the construction efficiency is improved. The accuracy and the reliability of a settlement detection result are further improved.

Description

Technical Field

[0001] This utility model belongs to the field of settlement detection technology, and specifically relates to a settlement detection device. Background Technology

[0002] In civil engineering, settlement detection of layered filling structures such as roadbeds, embankments, and embankment slopes is an important means of assessing the safety and stability of the project. By detecting the vertical settlement of different soil layers, the compression contribution of each soil layer can be accurately identified, providing key data support for construction quality control, post-construction settlement prediction, and risk warning.

[0003] Currently, the most common method for detecting layered settlement is the magnetic ring-type layered settlement meter method. This method involves drilling to a specified depth at the observation point after filling is completed, then burying a magnetic ring and protective casing. The spring plates on the magnetic ring are engaged with the surrounding soil layers, ensuring the ring settles synchronously with them. During testing, a probe and measuring scale are used to measure the positional changes of the magnetic ring using the principle of magnetic induction, thus calculating the settlement of each soil layer. However, drilling in the magnetic ring-type layered settlement meter method damages the soil structure, and the backfill compaction is difficult to match the original soil density, leading to distorted monitoring data. Furthermore, this method can only detect secondary settlement after filling is completed and cannot detect the layered settlement of soil layers during the construction period. Utility Model Content

[0004] The purpose of this invention is to provide a settlement detection device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A settlement detection device includes multiple settlement detection units sequentially embedded in a backfill soil layer from bottom to top and movably connected to each other. Each settlement detection unit includes: a settlement plate with a through hole in the center; a connecting cylinder assembly with its bottom end fixed in the through hole and capable of vertical extension and retraction; a connector detachably connected to the upper end of the connecting cylinder assembly for connecting adjacent settlement detection units in series; and a magnetic ring disposed on the upper end of the settlement plate and coaxial with the through hole. The settlement plate of the bottommost settlement detection unit is fixed to the foundation stable layer. The connecting cylinder assemblies of the multiple settlement detection units are sequentially connected to form a continuous through channel from the top layer to the stable layer.

[0007] Preferably, the connecting cylinder assembly includes: a first connecting cylinder with its bottom end fixedly connected to the through hole, a second connecting cylinder coaxially slidably sleeved inside the first connecting cylinder, and a corrugated pipe sleeved on the outside of the first and second connecting cylinders and connected to the first and second connecting cylinders respectively at both ends by hose clamps.

[0008] Preferably, the connecting cylinder assembly further includes: a sealing plug with external threads on its outer side that can be connected to the internal threads at the top of the second connecting cylinder, and a sealing cap disposed on the top surface of the sealing plug and having a diameter larger than that of the second connecting cylinder.

[0009] Preferably, the top surface of the sealing cover is provided with an inverted T-shaped groove, and the opening of the top surface of the groove is provided with a pressing plate adapted to the size of the opening. A spring is provided between the lower end of the pressing plate and the bottom end of the groove. When the spring is in its natural state, the top surface of the pressing plate is flush with the top surface of the sealing cover.

[0010] Preferably, the inner wall of the first connecting cylinder is provided with a plurality of grooves around the axis, and the outer wall of the second connecting cylinder is provided with protrusions that are adapted to the grooves.

[0011] Preferably, the connector includes: a connecting rod extending vertically through the connecting rod, and a frustum-shaped rubber ring fixedly sleeved on the outer wall of the connecting rod. The outer wall of the bottom end of the connecting rod has an external thread that can be threaded into the internal thread of the second connecting cylinder. The larger diameter end of the rubber ring is close to the external thread on the connecting rod. When the connecting rod is threaded into the second connecting cylinder, the bottom end of the rubber ring contacts the upper end of the second connecting cylinder. The larger diameter end of the rubber ring is the same as the inner diameter of the first connecting cylinder, and the smaller diameter end is smaller than the diameter of the second connecting cylinder.

[0012] Preferably, the settlement detection unit further includes a ground gripping mechanism, which includes multiple mounting holes through the settlement plate and ground nails that can be inserted into the mounting holes. The ground nails have an inverted conical lower end and a limiting cap at the upper end.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] 1. This utility model can pre-embed settlement detection units layer by layer during backfilling, without the need for drilling, thus avoiding damage to the original soil structure and data distortion caused by insufficient backfill compaction. The settlement plate is in direct contact with the soil layer, and the magnetic ring settles synchronously with the soil layer, further improving the accuracy and reliability of settlement detection results. In addition, this device can detect the settlement changes of each soil layer in real time during the filling process, thereby providing key data for construction quality control and risk warning, filling the gap of traditional detection methods.

[0015] 2. This utility model, through the coordinated deformation of the telescopic connecting cylinder assembly and the corrugated pipe, enables the overall height of the device to adaptively adjust with the compression of the soil layer during the filling and compaction process. The top surface of the sealing cover is eventually flush with the surface of the soil layer, thereby allowing the compaction equipment to directly pass through the detection point, avoiding damage to the device by the compaction equipment, ensuring that the compaction process does not need to avoid the monitoring point, significantly improving construction efficiency and ensuring the uniformity of the overall compaction quality of the filling layer.

[0016] 3. This utility model uses hose clamps to seal and connect both ends of the corrugated pipe to the first connecting cylinder and the second connecting cylinder respectively. This can not only adapt to the height changes caused by soil settlement and absorb the compression stress of backfill soil and rolling vibration, preventing deformation of the connecting cylinder, but also effectively prevent soil particles and water from entering the through channel, ensuring the smoothness of probe detection; the groove on the inner side of the first connecting cylinder and the protrusion on the outer side of the second connecting cylinder cooperate to restrict the two to slide only in the vertical direction, avoiding deviation or jamming caused by lateral force during rolling.

[0017] 4. This utility model uses multiple settlement detection units connected in series by connectors. The frustum structure of the rubber ring can fill the gap between the connecting rod and the first connecting cylinder, preventing soil and water from entering. This allows the connecting cylinder assemblies of each settlement detection unit to be connected vertically to form a continuous sealed channel, ensuring that the probe can reach the reference point of the stable layer and achieve full-depth settlement measurement, avoiding probe obstruction or data interference during detection.

[0018] 5. This utility model uses ground nails inserted into the installation holes of the settlement plate to penetrate the soil layer and provide anchoring force, which enhances the settlement plate's resistance to horizontal displacement, reduces lateral displacement caused by rolling, ensures coordinated deformation between the settlement plate and the soil layer, avoids relative sliding or separation between the settlement plate and the soil layer, and further improves the accuracy of the detection data. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a settlement detection device;

[0021] Figure 2 A schematic diagram of the settlement detection unit structure of a settlement detection device;

[0022] Figure 3 An exploded view of a settlement detection unit (excluding connectors) of a settlement detection device;

[0023] Figure 4 This is a schematic diagram of the structure of a settlement detection unit (with a sealing plug and a sealing cap) of a settlement detection device;

[0024] Figure 5 A cross-sectional view of a sealing plug and sealing cap for a settlement detection device.

[0025] Figure 6A schematic diagram of the structure of a connector for a settlement detection device;

[0026] Reference numerals: 1-Settling plate, 2-Connecting cylinder assembly, 3-Connector, 4-Magnetic ring, 5-First connecting cylinder, 6-Second connecting cylinder, 7-Hose clamp, 8-Bellwall, 9-Sealing plug, 10-Sealing cap, 11-Groove, 12-Pressing plate, 13-Spring, 14-Groove, 15-Protrusion, 16-Connecting rod, 17-Rubber ring, 18-Mounting hole, 19-Ground nail. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0031] Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0034] like Figure 1 As shown, a settlement detection device includes multiple settlement detection units that are sequentially buried in the backfill soil layer from bottom to top and are movably connected to each other. Each settlement detection unit includes: a settlement plate 1 with a through hole in the center; a connecting cylinder assembly 2 with its bottom end fixed in the through hole and capable of vertical extension and retraction; a connector 3 detachably connected to the upper end of the connecting cylinder assembly 2 for connecting adjacent settlement detection units in series; and a magnetic ring 4 disposed on the upper end of the settlement plate 1 and coaxial with the through hole. The settlement plate 1 of the bottommost settlement detection unit is fixed to the foundation stable layer. The connecting cylinder assemblies 2 of the multiple settlement detection units are sequentially connected to form a continuous through channel from the top layer to the stable layer.

[0035] It should be noted that: the settlement plate 1 is preferably made of aluminum alloy, stainless steel, or high-strength plastic material; the length of the connecting cylinder assembly 2 can be set according to the length of the backfill soil layer; the maximum length of the connecting cylinder assembly 2 should be greater than or equal to the loose thickness of the soil layer, and the minimum length should be less than the thickness of the soil layer after compaction; the magnetic ring 4 is a ring magnet, which can be coaxially placed on the top surface of the settlement plate 1 by adhesive fixing; in practice, the bottom end of the settlement plate 1 of the settlement detection unit at the bottom should be sealed; the settlement plate 1 can be fixed to the foundation stable layer by pouring concrete or by chemical anchoring, serving as the reference zero point of the entire monitoring system, ensuring that the bottom magnetic ring 4 does not move with the settlement of the backfill soil layer, and providing an absolute settlement reference; when installing the settlement detection unit at the top layer, a pit matching the size of the settlement plate 1 can be manually opened after the surface soil layer is compacted, so that the settlement plate 1 is fixed in the top layer of soil, and then the pit is backfilled and compacted, without the need to install the connecting parts 3 on it;

[0036] During installation and use, first assemble the settlement plate 1 and connecting cylinder assembly 2. Then, fix the settlement plate 1 of the bottom settlement detection unit to the stable foundation layer. Adjust the extension height of the connecting cylinder assembly 2 according to the loose soil thickness. Then lay the loose soil layer, ensuring the top surface of the connecting cylinder assembly 2 is flush with the top surface of the loose soil layer. When the compaction equipment operates, the soil layer is compressed vertically, causing the connecting cylinder assembly 2 to contract. This allows the overall height of the device to adaptively adjust with the soil compression, enabling the compaction equipment to pass directly through the detection points without needing to avoid them. This significantly improves construction efficiency and ensures the uniformity of the overall compaction quality of the fill layer. After the soil layer is backfilled and compacted, install the connector 3 on the upper end of the connecting cylinder assembly 2. Then, attach the upper settlement plate 1 and connecting cylinder assembly 2 to adjust the level. Repeat the above steps to perform the settlement detection of the uppermost layer. During the installation of the measuring unit, after the surface soil layer is compacted, a pit matching the size of the settlement plate 1 needs to be manually dug so that the settlement plate 1 is fixed in the uppermost soil layer. Then the pit is backfilled and compacted, and no connecting parts 3 need to be installed on it. After the device is installed, each layer of settlement plate 1 deforms vertically with the soil layer it is in, and the magnetic ring 4 moves synchronously. The connecting cylinder assembly 2 of each layer forms a channel. The probe is inserted into the channel through the opening of the top sealing cover 10 and lowered down to the position of each layer of magnetic ring 4. The distance change of the magnetic ring 4 relative to the reference point (bottom magnetic ring 4) is measured by the principle of magnetic induction. The displacement difference between two adjacent magnetic rings 4 is the settlement of the soil layer between the two layers. The displacement difference between the bottom magnetic ring 4 and the ground surface is the total settlement. By comparing the position of the magnetic ring 4 at each stage of construction, the dynamic settlement data of each soil layer during the filling process can be obtained in real time.

[0037] like Figure 2 As shown, the connecting cylinder assembly 2 includes: a first connecting cylinder 5 with its bottom end fixedly connected to the through hole, a second connecting cylinder 6 coaxially and slidably sleeved inside the first connecting cylinder 5, and a corrugated pipe 8 sleeved on the outside of the first connecting cylinder 5 and the second connecting cylinder 6, with its two ends connected to the first connecting cylinder 5 and the second connecting cylinder 6 respectively by hose clamps 7.

[0038] In order to limit the circumferential rotation of the first connecting cylinder 5 and the second connecting cylinder 6 and allow only axial sliding, and also to avoid deviation or jamming caused by lateral force during the rolling process, a plurality of grooves 14 are provided on the inner side wall of the first connecting cylinder 5 around the axis, and a protrusion 15 adapted to the grooves 14 is provided on the outer side wall of the second connecting cylinder 6.

[0039] It should be noted that the settling plate 1 and the first connecting cylinder 5 are integrally formed, and the second connecting cylinder 6 inside the first connecting cylinder 5 can be made of aluminum alloy, stainless steel or high-strength plastic.

[0040] During the layered filling construction, when the loose soil layer is laid, the top surface of the top sealing cover 10 is flush with the top surface of the loose soil layer by adjusting the telescopic height of the connecting cylinder assembly 2. When the compaction equipment is operating, the soil layer is compressed vertically. At this time, the second connecting cylinder 6 slides vertically along the groove 14 on the inner wall of the first connecting cylinder 5, and the outer corrugated pipe 8 folds and shrinks synchronously. During this process, the overall height of the device is adaptively adjusted with the compression of the soil layer. The sealing cover 10 always remains flush with the top surface of the compacted soil layer after compaction. The compaction equipment can directly pass through the detection point, avoiding damage to the device by the compaction equipment. This ensures that the compaction process does not need to avoid the monitoring point, significantly improving construction efficiency and ensuring the uniformity of the overall compaction quality of the filling layer.

[0041] like Figure 3 As shown, the connecting cylinder assembly 2 further includes: a sealing plug 9 with external threads on its outer side and which can be connected to the internal threads at the top of the second connecting cylinder 6, and a sealing cap 10 disposed on the top surface of the sealing plug 9 and having a diameter larger than that of the second connecting cylinder 6; the sealing cap 10 completely covers the channel opening to prevent soil, sand or crushed debris from falling into the channel and affecting the detection structure during construction.

[0042] The sealing cover 10 has an inverted T-shaped groove 11 on its top surface. A pressing plate 12, which is adapted to the size of the opening, is provided at the top opening of the groove 11. A spring 13 is provided between the lower end of the pressing plate 12 and the bottom of the groove 14. When the spring 13 is in its natural state, the top surface of the pressing plate 12 is flush with the top surface of the sealing cover 10. The concave handle design makes it easy to manually rotate the sealing plug 9, thereby quickly opening and closing the detection passage without the need for special tools. The pressing plate 12 also prevents dirt and sand from entering the groove 11, which would make it difficult to open and close the sealing plug 9.

[0043] like Figure 4 As shown, the connecting member 3 includes: a connecting rod 16 that runs vertically through the top and bottom, and a rubber ring 17 that is fixedly sleeved on the outer wall of the connecting rod 16 and is in the shape of a frustum. The outer wall of the bottom end of the connecting rod 16 can be threaded with the internal thread of the second connecting cylinder 6. The larger diameter end of the rubber ring 17 is close to the external thread on the connecting rod 16. When the connecting rod 16 is threadedly connected to the second connecting cylinder 6, the bottom end of the rubber ring 17 contacts the upper end of the second connecting cylinder 6. The larger diameter end of the rubber ring 17 is the same as the inner diameter of the first connecting cylinder 5, and its smaller diameter end is smaller than the diameter of the second connecting cylinder 6.

[0044] After the soil layer is spread and compacted, remove the sealing plug 9 on the second connecting cylinder 6, and then thread the connecting rod 16 onto the second connecting cylinder 6 so that the bottom surface of the rubber ring 17 presses against the top of the second connecting cylinder 6. Then, the upper settlement plate 1 and the connecting cylinder assembly 2 are fitted onto the connecting rod 16. Since the rubber ring 17 has a frustum structure, it can fill the gap between the connecting rod 16 and the first connecting cylinder 5, preventing soil and water from entering. This allows the connecting cylinder assemblies 2 of each settlement detection unit to be connected vertically to form a continuous sealed channel, ensuring that the probe can reach the reference point of the stable layer and achieve full-depth settlement measurement, avoiding probe obstruction or data interference during detection.

[0045] like Figure 1 As shown, the settlement detection unit also includes a ground gripping mechanism, which includes multiple mounting holes 18 that penetrate the settlement plate 1 and ground nails 19 that can be inserted into the mounting holes 18. The lower end of the ground nail 19 is inverted conical and the upper end is provided with a limiting cap. Each layer of settlement plate 1 is inserted into the mounting holes 18 and driven into the soil layer through the ground nails 19, which enhances the horizontal displacement resistance of the settlement plate 1, reduces the lateral displacement caused by rolling, ensures that the settlement plate 1 and the soil layer deform together, avoids relative sliding or separation between the settlement plate 1 and the soil layer, and further improves the accuracy of the detection data.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail can be made thereto without departing from the spirit and scope of this utility model as defined in the appended claims.

Claims

1. A settlement detection device, characterized in that: The system includes multiple settlement detection units that are sequentially buried in the backfill soil layer from bottom to top and are movably connected to each other. Each settlement detection unit includes: a settlement plate (1) with a through hole in the center; a connecting cylinder assembly (2) with its bottom fixed in the through hole and capable of vertical extension and retraction; a connector (3) detachably connected to the upper end of the connecting cylinder assembly (2) for connecting adjacent settlement detection units in series; and a magnetic ring (4) set on the upper end of the settlement plate (1) and coaxial with the through hole. The settlement plate (1) of the settlement detection unit at the bottom is fixed on the foundation stable layer. The connecting cylinder assemblies (2) of the multiple settlement detection units are sequentially connected to form a continuous through channel from the top layer to the stable layer.

2. The settlement detection device according to claim 1, characterized in that: The connecting cylinder assembly (2) includes: a first connecting cylinder (5) with its bottom end fixedly connected in the through hole, a second connecting cylinder (6) coaxially and slidably sleeved in the first connecting cylinder (5), and a corrugated pipe (8) sleeved on the outside of the first connecting cylinder (5) and the second connecting cylinder (6) and connected to the first connecting cylinder (5) and the second connecting cylinder (6) respectively by hose clamps (7).

3. A settlement detection device according to claim 2, characterised in that: The connecting cylinder assembly (2) further includes: a sealing plug (9) with external threads on its outer side and which can be connected to the internal threads at the top of the second connecting cylinder (6), and a sealing cap (10) disposed on the top surface of the sealing plug (9) and having a diameter larger than that of the second connecting cylinder (6).

4. The settlement detection device according to claim 3, characterized in that: The top surface of the sealing cover (10) is provided with an inverted T-shaped groove (11). The top opening of the groove (11) is provided with a pressing plate (12) that matches the size of the opening. A spring (13) is provided between the lower end of the pressing plate (12) and the bottom end of the groove (11). When the spring (13) is in its natural state, the top surface of the pressing plate (12) is flush with the top surface of the sealing cover (10).

5. The settlement detection apparatus of claim 2, wherein: The inner wall of the first connecting cylinder (5) is provided with a plurality of grooves (14) around the axis, and the outer wall of the second connecting cylinder (6) is provided with protrusions (15) that are adapted to the grooves (14).

6. A settlement detection device according to claim 2, characterized in that: The connector (3) includes: a connecting rod (16) that runs vertically through the top and bottom, and a rubber ring (17) that is fixedly sleeved on the outer wall of the connecting rod (16) and is in the shape of a frustum. The outer wall of the bottom end of the connecting rod (16) is provided with an external thread that can be threadedly connected to the internal thread of the second connecting cylinder (6). The larger diameter end of the rubber ring (17) is close to the external thread on the connecting rod (16). When the connecting rod (16) is threadedly connected to the second connecting cylinder (6), the bottom end of the rubber ring (17) is in contact with the upper end of the second connecting cylinder (6). The larger diameter end of the rubber ring (17) is the same as the inner diameter of the first connecting cylinder (5), and its smaller diameter end is smaller than the diameter of the second connecting cylinder (6).

7. A settlement detection device according to claim 1, characterized in that: The settlement detection unit also includes a ground gripping mechanism, which includes multiple mounting holes (18) that penetrate the settlement plate (1) and ground nails (19) that can be inserted into the mounting holes (18). The lower end of the ground nail (19) is inverted cone-shaped and the upper end is provided with a limiting cap.

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