A self-expanding surveying tube fixing device suitable for loose formation

Abstract

The utility model relates to a kind of self-expanding inclinometer casing fixing device suitable for loose formation.The traditional means for backfilling the gap between inclinometer casing and hole wall has poor coupling, complex construction, and cannot completely backfill and compact the hole wall. The utility model includes water-swelling rubber, further includes base ring and multiple coupling components;The base ring is sleeved on the outer wall of inclinometer casing, the coupling components are arranged on the base ring at intervals, and the coupling components are located between the base ring and the hole wall of drilling hole, the water-swelling rubber is arranged between the inclinometer casing and the coupling components.The utility model can rigidly couple the inclinometer casing with the surrounding formation to ensure the absolute synchronization of inclinometer casing and formation deformation, multiple arc-shaped wing plates move independently, can adapt to the uneven condition of drilling hole wall, ensure uniform distribution of pressure, realize full-area contact;The structure is extremely simple, the manufacturing cost is low, without manual handling of filling materials such as mud, construction is simple.

Description

Technical Field

[0001] This utility model relates to the field of slope safety monitoring technology, specifically to a self-expanding inclinometer fixing device suitable for loose strata. Background Technology

[0002] In the safety monitoring of slope engineering, deep displacement monitoring is a crucial means. By drilling and burying inclinometer tubes, and using equipment such as inclinometers and array displacement gauges, the displacement changes at different depths of the slope are obtained in the inclinometer tubes to identify potential slip surfaces, judge the trend of change, and the rate of change. Therefore, the accuracy of inclinometer tube data depends on its coupling degree with the surrounding rock and soil, that is, the two must deform synchronously.

[0003] The borehole diameter is usually larger than the diameter of the inclinometer tube, requiring backfilling of the gap between the inclinometer tube and the borehole wall to improve the coupling between the tube wall and the surrounding soil and rock. However, in loose strata such as loose deposits, fractured rock masses, or soft soil, the borehole wall is often uneven after drilling. Traditional grouting backfilling methods have poor compaction and cannot completely compact the borehole wall, which may result in the inclinometer tube not being completely fixed at a certain depth, causing data fluctuations and affecting monitoring judgment. Poor coupling means that the backfill material itself may be compressed or slip with the borehole wall, causing the soil and rock mass to shift, but the inclinometer tube does not respond in time, resulting in a "hysteresis effect" and severely distorted monitoring data. Construction is complex, the grouting process is cumbersome, requiring mixing and grouting equipment, and the slopes are mostly steep, requiring manual transport of materials such as cement and sand to the point, resulting in high backfilling costs and low efficiency. In addition, the complete solidification and stabilization of materials such as mud takes time, which has a significant impact on the monitoring schedule.

[0004] Therefore, there is an urgent need for a clinometer fixing device that can ensure tight coupling between the clinometer and loose strata, is easy to install, and can adapt to irregular borehole walls. Summary of the Invention

[0005] The purpose of this invention is to provide a self-expanding inclinometer fixing device suitable for loose formations, so as to at least solve the problems of poor coupling, complex construction and inability to completely compact the borehole wall in traditional backfilling methods.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A self-expanding inclinometer fixing device suitable for loose formations includes water-swellable rubber, a base ring, and multiple coupling components; The base ring is sleeved on the outer wall of the inclinometer tube, the coupling components are spaced apart on the base ring, and the coupling components are located between the base ring and the borehole wall. The water-swellable rubber is disposed between the inclinometer tube and the coupling components.

[0007] Furthermore, the base ring includes two semi-circular fasteners, the semi-circular fasteners Furthermore, the outer end of the base ring is uniformly provided with a plurality of radial guide grooves, and the coupling components are respectively disposed in the radial guide grooves.

[0008] Furthermore, the radial guide groove has a cuboid structure.

[0009] Furthermore, the coupling assembly includes a guide bump and an arc-shaped wing plate, the guide bump being disposed in the radial guide groove, and the arc-shaped wing plate being disposed at one end of the guide bump near the borehole wall.

[0010] Furthermore, the guide protrusion includes a guide rod and a connecting rod. The guide rod is vertically arranged, and the connecting rod is horizontally arranged in the middle of the guide rod. The arc-shaped wing plate is arranged at the end of the connecting rod away from the guide rod.

[0011] Furthermore, both the guide rod and the connecting rod are cuboid structures, and the width of the guide rod is the same as the width of the connecting rod.

[0012] Furthermore, an annular cavity is formed between the arc-shaped wing plate and the inclinometer tube.

[0013] Furthermore, the water-swellable rubber has a ring-shaped structure and fills the annular cavity.

[0014] Furthermore, the arc-shaped wing plate has serrations on the side near the borehole wall.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a self-expanding inclinometer fixing device suitable for loose strata. The activation of the device is directly related to the water content of the strata and requires no human intervention. In potential slip zones rich in groundwater, it can automatically trigger coupling to fix the inclinometer. As the water-swellable rubber continues to expand, the pressure gradually increases, ensuring that the arc-shaped wing plate can make close contact with the borehole wall with different flatness, forming an unbreakable "bonding" effect. This achieves the purpose of rigidly coupling the inclinometer with the surrounding strata, ensuring absolute synchronization between the inclinometer and the strata deformation.

[0016] 2. In this utility model, multiple arc-shaped wing plates move independently, which can adapt to the unevenness of the borehole wall, ensure uniform pressure distribution, and achieve full-area contact; and the water-swellable rubber can expand several times in volume after contact with water, generating extremely high expansion pressure, which is sufficient to form a reliable anchoring force in loose strata, effectively eliminating gaps and ensuring reliable coupling.

[0017] 3. This utility model requires no ground control equipment, pumps or pipelines. The device itself is composed of a small number of mechanical parts and rubber, with an extremely simple structure and low manufacturing cost. It does not require manual handling of filling materials such as mud, and construction is simple. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an axial cross-sectional view of the present invention before expansion; Figure 2 This is an axial cross-sectional view of the expanded version of this utility model; Figure 3 This is a radial cross-sectional view of the expanded version of this utility model; The diagram is labeled as follows: 1- Inclinometer tube, 2- Base ring, 21- Fastening bolt, 22- Radial guide groove, 23- Semi-circular fastener, 3- Coupling assembly, 31- Guide protrusion, 32- Arc-shaped wing plate, 4- Water-swellable rubber, 5- Drill hole wall. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In a specific implementation, Figure 1 The length direction of the inclinometer tube is defined as the axial direction. Figure 1 The direction perpendicular to the length of the inclinometer tube is defined as radial.

[0024] Example: like Figure 1 As shown, this embodiment provides a self-expanding inclinometer fixing device suitable for loose formations, including a water-swellable rubber 4, a base ring 2, and four coupling components 3. After the inclinometer 1 is installed, it can actively expand and tightly press against the borehole wall 5 to achieve a rigid connection between the inclinometer 1 and the formation, ensuring the real-time and accuracy of displacement transmission. At the same time, it has a simple structure, is easy to install, and is inexpensive.

[0025] Specifically, the base ring 2 is fitted onto the outer wall of the inclinometer tube 1. The base ring 2 includes two semi-circular fasteners 23, which are symmetrically wrapped around the outer wall of the inclinometer tube 1. At the joint of the two semi-circular fasteners 23, the end of one semi-circular fastener 23 is placed above the end of the other semi-circular fastener 23. The two semi-circular fasteners 23 are fixed at the overlapping ends by fastening bolts 21. The inner diameter of the semi-circular fasteners 23 matches the outer diameter of the inclinometer tube 1. The base ring 2 is fixed to the inclinometer tube 1 by the fastening force of the fastening bolts 21 and the friction between the semi-circular fasteners 23 and the inclinometer tube 1.

[0026] Four radial guide grooves 22 are evenly provided on the outer end of the base ring 2. The radial guide grooves 22 are cuboid structures. Three radial guide grooves 22 are provided on a semi-circular fastener 23. Two of the radial guide grooves 22 are distributed near the joint of the two semi-circular fasteners 23. One radial guide groove 22 is provided on the other semi-circular fastener 23. The coupling components 3 are respectively disposed in the radial guide grooves 22.

[0027] Specifically, the coupling components 3 are spaced apart on the base ring 2, and the coupling components 3 are located between the base ring 2 and the borehole wall 5. The coupling components 3 can slide radially on the base ring 2.

[0028] The coupling component 3 includes a guide protrusion 31 and an arc-shaped wing plate 32. In other embodiments, at least three arc-shaped wing plates 32 are provided. The guide protrusion 31 is engaged in the radial guide groove 22. The arc-shaped wing plate 32 is disposed at one end of the guide protrusion 31 near the borehole wall 5, and the arc of the arc-shaped wing plate 32 faces the borehole wall 5.

[0029] In this embodiment, the guide protrusion 31 includes a guide rod and a connecting rod. The guide rod is vertically arranged, and the connecting rod is horizontally and integrally arranged in the middle of the end of the guide rod near the borehole wall 5. An arc-shaped wing plate 32 is welded to the end of the connecting rod away from the guide rod.

[0030] Both the guide rod and the connecting rod are cuboid structures, and the width of the guide rod and the width of the connecting rod are the same, both slightly smaller than the width of the radial guide groove 22. Thus, the guide rod and the connecting rod can be fixed in the radial guide groove 22 by friction.

[0031] In this embodiment, the arc-shaped wing plate 32 is made of aluminum alloy. When the arc-shaped wing plate 32 is pushed radially by an external force, it can drive the guide rod and the connecting rod to slide radially in the radial guide groove 22. When the arc-shaped wing plate 32 is in close contact with the borehole wall 5, the guide protrusion 31 is still located in the radial guide groove 22, thereby realizing the rigid connection between the inclinometer tube 1 and the formation.

[0032] Specifically, the side of the arc-shaped wing plate 32 closest to the borehole wall 5 is provided with teeth to increase the friction between the arc-shaped wing plate 32 and the borehole wall 5. In other embodiments, the side of the arc-shaped wing plate 32 closest to the borehole wall 5 may also be rough. Multiple arc-shaped wing plates 32 can move independently, which can adapt to the unevenness of the borehole wall 5, ensure uniform pressure distribution, and achieve full-area contact.

[0033] Specifically, the water-swellable rubber 4 is placed between the inclinometer tube 1 and the coupling component 3. The four arc-shaped wing plates 32 form an annular cavity with the inclinometer tube 1. The water-swellable rubber 4 has a ring structure and is filled in the annular cavity. The water-swellable rubber 4 is in a compressed state in the free state. After encountering water, it rapidly expands to several times its own volume, generating extremely high expansion pressure (up to several MPa), which is sufficient to form a reliable anchoring force in loose strata and effectively eliminate voids. In the initial dry state, the water-swellable rubber 4 is in an unexpanded state and is fixed in the annular cavity by the obstruction of the arc-shaped wing plates 32. At this time, the outer diameter of the entire device is small, which facilitates its smooth entry into the borehole with the inclinometer tube 1.

[0034] like Figure 2 and Figure 3As shown, the inclinometer tube 1 equipped with this device is lowered into the borehole. When groundwater seeps in or artificially injected activation water comes into contact with the water-swellable rubber 4, the water-swellable rubber 4 begins to absorb water and expand. Since the water-swellable rubber 4 is confined within the annular cavity, it generates a huge radial expansion pressure, which acts evenly on the inner side of all the arc-shaped flanges 32. This pushes the arc-shaped flanges 32 to slide radially toward the borehole wall 5. The strong expansion force causes the arc-shaped flanges 32 to embed into the loose soil layer of the borehole wall 5, ultimately firmly pressing them down. Tightly attached to the borehole wall 5, as the water-swellable rubber 4 continues to expand, the pressure gradually increases, ensuring that the arc-shaped wing plate 32 can achieve tight contact with the borehole wall with different flatness, forming an unbreakable "bonding" effect, thereby achieving the purpose of rigidly coupling the inclinometer tube 1 with the surrounding strata, ensuring absolute synchronization between the inclinometer tube 1 and the strata deformation. At the same time, this embodiment is an automatic trigger coupling, and the triggering condition is directly related to the strata water content. No human intervention is required. In potential slip zones rich in groundwater, it can automatically play a role in fixing the inclinometer tube 1.

[0035] In this embodiment, based on geological survey data, multiple devices are densely deployed along the length of the inclinometer tube 1 in key monitoring sections such as soil layer interfaces and potential slip zones, thereby forming a high-precision deep displacement monitoring system with no slippage throughout the entire process.

[0036] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A self-expanding inclinometer fixing device suitable for loose strata, comprising water-swellable rubber (4), characterized in that: It also includes a base ring (2) and multiple coupling components (3); The base ring (2) is sleeved on the outer wall of the inclinometer tube (1), the coupling component (3) is spaced on the base ring (2), and the coupling component (3) is located between the base ring (2) and the borehole wall (5), and the water-swellable rubber (4) is disposed between the inclinometer tube (1) and the coupling component (3).

2. The self-expanding inclinometer fixing device suitable for loose formations according to claim 1, characterized in that: The base ring (2) includes two semi-circular fasteners (23), which are symmetrically surrounding the outer wall of the inclinometer tube (1) and fixed by fastening bolts (21).

3. The self-expanding inclinometer fixing device suitable for loose strata according to claim 1, characterized in that: The outer end of the base ring (2) is provided with a plurality of radial guide grooves (22), and the coupling components (3) are respectively disposed in the radial guide grooves (22).

4. The self-expanding inclinometer fixing device suitable for loose formations according to claim 3, characterized in that: The radial guide groove (22) has a cuboid structure.

5. A self-expanding inclinometer fixing device suitable for loose formations according to claim 3, characterized in that: The coupling assembly (3) includes a guide bump (31) and an arc-shaped wing plate (32). The guide bump (31) is disposed in the radial guide groove (22), and the arc-shaped wing plate (32) is disposed at one end of the guide bump (31) near the borehole wall (5).

6. A self-expanding inclinometer fixing device suitable for loose formations according to claim 5, characterized in that: The guide protrusion (31) includes a guide rod and a connecting rod. The guide rod is vertically arranged, and the connecting rod is horizontally arranged in the middle of the guide rod. The arc-shaped wing plate (32) is arranged at the end of the connecting rod away from the guide rod.

7. A self-expanding inclinometer fixing device suitable for loose formations according to claim 6, characterized in that: Both the guide rod and the connecting rod are cuboid structures, and the width of the guide rod and the width of the connecting rod are the same.

8. A self-expanding inclinometer fixing device suitable for loose formations according to claim 5, characterized in that: An annular cavity is formed between the arc-shaped wing plate (32) and the inclinometer tube (1).

9. A self-expanding inclinometer fixing device suitable for loose formations according to claim 8, characterized in that: The water-swellable rubber (4) has a ring structure and is filled in the annular cavity.

10. A self-expanding inclinometer fixing device suitable for loose formations according to claim 5, characterized in that: The arc-shaped wing plate (32) has serrations on the side near the borehole wall (5).

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