Convergence measuring pile

Abstract

The utility model discloses a convergent measuring pile which comprises a rod body and a measuring head, the rod body comprises an anchoring rod, one end of the anchoring rod is anchored in a cavern rock wall, and the other end of the anchoring rod extends out of the cavern rock wall and is detachably connected with the measuring head through a connecting rod or is directly and detachably connected with the measuring head. According to the utility model, the damage probability of the convergence measuring points in the construction process can be greatly reduced, the repeated arrangement of the convergence measuring heads is reduced, and the working efficiency is improved; when the measuring head is damaged or the measuring head is covered in concrete lining construction, the convergence measuring pile can be conveniently recovered at the original position, and the continuity of monitoring data is ensured.

Description

Technical Field

[0001] This utility model relates to the field of cavern surrounding rock deformation monitoring, specifically to a convergence measuring pile. Background Technology

[0002] Convergence measurement is a simple and effective method for measuring the deformation of surrounding rock in underground caverns. It is widely used in water conservancy, hydropower, railway, and other engineering projects and is an essential measurement item for safety monitoring during underground cavern construction. Total station measurement is a commonly used method for convergence measurement because it offers fast observation speed, high accuracy, is not limited by tunnel height, and does not require climbing to heights.

[0003] Converging measuring points are typically arranged in cross-sections at the top, middle, or other locations within the tunnel. Reflecting prisms or reflectors are pre-installed at the points to be measured, forming a measuring line between every two points. A total station is used to measure the coordinates of the measuring points and calculate the distance between them. The relative displacement of the two measuring points at different times is converted into the difference in distance values, thus yielding the change in distance between the measured locations.

[0004] However, in the tunnel construction environment, convergence monitoring points are easily affected by on-site blasting, construction vehicles, etc., which often damages the monitoring points and forces the monitoring process to be interrupted. In tunnels that require lining, the concrete lining will cover the convergence monitoring points, and the monitoring points need to be re-embedded after lining, which not only increases costs but also leads to discontinuity in monitoring data.

[0005] Therefore, there is a need for a convergent measuring pile that can be easily restored to its original position when the measuring point is damaged or covered by lining construction, so as to ensure the continuity of monitoring data. Utility Model Content

[0006] The technical problem to be solved by this utility model is that, in view of the shortcomings of existing convergence measuring points which are often damaged in the tunnel construction environment or easily covered during lining construction, this utility model provides a convergence measuring pile that can be easily restored in its original position.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A convergence measuring stake includes a rod body and a measuring head. The rod body includes an anchor rod, one end of which is anchored to the rock wall of a cavern, and the other end extends out of the rock wall of the cavern and is detachably connected to the measuring head via a connecting rod, or is directly detachably connected to the measuring head.

[0009] This utility model of convergence measuring pile includes an anchor rod, one end of which is anchored inside the cavern rock wall, and the other end extends out of the cavern rock wall and can be detachably connected to the measuring head via a connecting rod, or can be directly detachably connected to the measuring head. In this way, when the measuring point is damaged or the measuring point is covered by concrete lining construction, the convergence measuring pile can be easily restored in the original position, thereby ensuring the continuity of monitoring data.

[0010] Preferably, the connecting rod is a single section or a multi-section structure connected in sequence.

[0011] Preferably, the probe and the connecting rod, the connecting rod and the anchor rod, the connecting rod and the anchor rod are all connected by threads.

[0012] Preferably, the end of the anchor rod extending out of the cavern rock wall is provided with a first threaded head, and the connecting rod is provided with a first threaded groove that matches the first threaded head, and the first threaded head and the first threaded groove are threadedly connected.

[0013] Preferably, one end of each connecting rod section has the first threaded groove, and the other end has a second threaded head, with the first threaded groove of one connecting rod section being threadedly connected to the second threaded head of another connecting rod section.

[0014] Preferably, the probe includes a measuring point connector and a reflector. One end of the measuring point connector is provided with a second threaded groove, and the other end is equipped with the reflector. The second threaded groove is threadedly connected to the first threaded head or the second threaded head.

[0015] Preferably, during the construction of concrete lining or shotcrete in the tunnel, a temporary spiral protective cap is screwed into the first threaded head or the second threaded head.

[0016] Preferably, the anchor rod and the connecting rod are made of metal, and the probe is made of PVC.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1) The anchor rod of this utility model can be detachably connected to the probe via the connecting rod, or can be directly detachably connected to the probe. When there is blasting construction near the probe point, the probe can be removed and reinstalled after the blasting is completed, thereby greatly reducing the probability of damage to the convergence probe during construction, reducing the repeated deployment of convergence probes, and improving work efficiency.

[0019] 2) When the measuring point is damaged or covered by concrete lining construction, the convergence measuring point can be easily restored at the original position by replacing the measuring head or adding connecting rods to extend the convergence measuring point, thus ensuring the continuity of monitoring data;

[0020] 3) The structure is simple, easy to install, and can be reused, saving costs. Attached Figure Description

[0021] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the arrangement of this utility model in cavern convergence measurement.

[0023] Figure 2 This is a schematic diagram of the structure of this utility model.

[0024] In the figure: 1-anchor rod, 11-first threaded head, 2-connecting rod, 21-second threaded head, 22-first threaded groove, 3-probe, 31-probe connector, 32-reflector, 4-epoxy resin adhesive, 5-rock mass, 6-concrete lining. Detailed Implementation

[0025] The present invention will be further described below with reference to specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; 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.

[0028] Please see Figure 1 , Figure 2 The present invention, in one embodiment of a convergence pile measuring device, mainly consists of an anchor rod 1, a connecting rod 2, and a measuring head 3.

[0029] The anchor rod 1 can be a ribbed steel bar or a threaded rod. One end of the anchor rod 1 is embedded in the cavern rock wall 5 for fixation, and the center position of the end extending out of the cavern rock wall is provided with a first threaded head 11. The outer surface of the first threaded head 11 is provided with a threaded part that matches the first threaded groove 22 provided in the center of the connecting rod 2.

[0030] The connecting rod 2 has a first threaded groove 22 at its center at one end, and an internal threaded portion therein. The connecting rod also has a second threaded head 21 at its center at the other end, with a threaded portion on its outer surface that matches the first threaded groove 22. When needed, multiple connecting rod sections 2 can be connected in series to form a connecting rod.

[0031] The probe 3 consists of a measuring point connector 31 and a reflector 32. One end of the measuring point connector 31 is provided with a second threaded groove, which can be threadedly connected to the first threaded head 11 on the anchor rod 1 or the second threaded head 21 on the connecting rod 2. The other end is equipped with the reflector 32.

[0032] The probe 3 and the connecting rod 2, the connecting rod 2 and the anchor rod 1, the connecting rod 2 and the connecting rod 2, and the probe 3 and the anchor rod 1 can all be connected by threads.

[0033] During the construction of concrete lining 6 or shotcrete in the tunnel, the first threaded head 11 or the second threaded head 21 can be protected with a temporary spiral protective cap (not shown in the figure) to prevent slurry contamination.

[0034] Anchor rod 1 and connecting rod 2 are preferably made of metal materials such as steel bars and round steel.

[0035] The probe 3 is preferably made of PVC material.

[0036] In use, the convergence measuring stake is anchored to the cavern rock wall 5 according to the designed position, and the measuring head 3 extends out of the concrete lining 6 through the anchor rod 1 and the connecting rod 2. The following describes the application of this utility model using a specific engineering project as an example.

[0037] During the construction of a tunnel project, total station measurements were used to monitor tunnel convergence deformation. One convergence measuring point was placed at the top and two sides of the monitoring section along the tunnel, for a total of three measuring points per monitoring section. To more effectively protect the measuring points, convergence measuring stakes of this invention were installed on-site.

[0038] The anchor rod 1, connecting rod 2, and probe 3 of the convergence monitoring pile are all manufactured according to fixed specifications. Anchor rod 1 and connecting rod 2 are made of Φ22mm steel bars, probe 3 is made of PVC, and reflector 32 is a purchased finished product. During on-site installation, holes are drilled along the monitoring section at the designed location, anchor rod 1 is inserted, and epoxy resin 4 is injected for consolidation. Before the construction of concrete lining 6, probe 3 is directly installed at the end of anchor rod 1 extending into the rock mass using a threaded connection for convergence monitoring. During the construction of concrete lining 6, probe 3 is removed, and connecting rod 2 is installed at the end of anchor rod 1 extending into the cavern rock wall using a threaded connection. The length of connecting rod 2 after installation is slightly less than the thickness of concrete lining 6. A protective tube of equal length can be fitted over connecting rod 2 inside concrete lining 6, allowing connecting rod 2 to move freely within the protective tube. The convergence monitoring pile can accurately represent the deformation of the cavern rock mass after lining, while also protecting the second threaded end 21 of connecting rod 2 to prevent grout contamination. After the concrete lining 6 is demolded, the probe 3 is installed on the connecting rod 2, and convergence monitoring can continue. In this case, during the construction of the concrete lining 6, the number of connecting rods 2 can be freely increased or decreased as needed to change the length of the measuring pile. After the construction of the concrete lining 6, the convergence measuring pile can be easily restored in the original position. By adding a fixed constant related to the length of the connecting rod, the continuity of the monitoring data can be guaranteed.

[0039] Because the material stiffness of probe 3 differs significantly from that of anchor rod 1 and connecting rod 2, when subjected to external impact or collision, only probe 3 will be damaged, while anchor rod 1 and connecting rod 2 will not undergo significant deformation. Simply replacing probe 3 will restore the measuring point.

[0040] By using the convergence measuring stake of this utility model, when the measuring head 3 is damaged or may be covered by the concrete lining 6 construction, the convergence measuring stake can be easily restored in its original position, reducing the repeated deployment of convergence measuring stakes, saving costs, and ensuring the continuity of monitoring data.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solution of this utility model should fall within the protection scope of the technical solution of this utility model.

Claims

1. A convergent measuring stake, comprising a rod and a measuring head, characterized in that: The rod body includes an anchor rod, one end of which is anchored to the cavern rock wall, and the other end extends out of the cavern rock wall and is detachably connected to the probe via a connecting rod, or can be directly detachably connected to the probe.

2. The convergence pile measurement according to claim 1, characterized in that, The connecting rod can be a single section or multiple sections connected sequentially.

3. The convergence pile measurement according to claim 2, characterized in that, The probe and the connecting rod, the connecting rod and the anchor rod, the connecting rod and the probe and the anchor rod are all connected by threads.

4. The convergence pile measurement according to claim 2, characterized in that, The end of the anchor rod extending out of the cavern rock wall is provided with a first threaded head, and the connecting rod is provided with a first threaded groove that matches the first threaded head. The first threaded head and the first threaded groove are threadedly connected.

5. The convergence pile according to claim 4, characterized in that, Each connecting rod section has a first threaded groove at one end and a second threaded head at the other end, with the first threaded groove of one connecting rod section being threadedly connected to the second threaded head of another connecting rod section.

6. The convergence pile according to claim 5, characterized in that, The probe includes a measuring point connector and a reflector. One end of the measuring point connector is provided with a second threaded groove, and the other end is equipped with the reflector. The second threaded groove is threadedly connected to the first threaded head or the second threaded head.

7. The convergence pile measurement according to claim 5, characterized in that, During the construction of concrete lining or shotcrete in the tunnel, a temporary spiral protective cap is placed on the first threaded head or the second threaded head.

8. The convergence stake according to any one of claims 1-7, characterized in that, The anchor rod and the connecting rod are made of metal, and the probe is made of PVC.

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