CN212747693U - Embedded measuring pile for monitoring tunnel deformation - Google Patents
Embedded measuring pile for monitoring tunnel deformation Download PDFInfo
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- CN212747693U CN212747693U CN202021427358.XU CN202021427358U CN212747693U CN 212747693 U CN212747693 U CN 212747693U CN 202021427358 U CN202021427358 U CN 202021427358U CN 212747693 U CN212747693 U CN 212747693U
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Abstract
The utility model discloses an embedded measuring pile for tunnel deformation monitoring, which comprises a measuring rod inserted into tunnel surrounding rock, wherein the tail end of the measuring rod is provided with a protective box with the bottom folded inwards, the inclination angle of an inclined plane of the protective box is consistent with the inclination angle of the tail end of the measuring rod after cutting, and the measuring rod and the protective box after cutting are fixedly connected to the center of the outer surface of the inclined plane through the inclined plane; the first light reflecting sticker is arranged at the center of the inner surface of the inclined plane and serves as an observation point; the protective box and the protective cover are arranged in an installation groove sunk into the tunnel wall, and isolation seams are formed between the protective box and the protective cover and the tunnel wall; the damage to the measuring pile caused by the impact of flying stones generated in the collision or blasting process of the excavator can be effectively prevented; the pile is convenient to stack in the transportation process, and has a very positive effect on solving the problem that the measuring pile is easy to damage in the actual construction process.
Description
Technical Field
The utility model relates to a tunnel construction measuring device field especially relates to an embedded measuring pile for tunnel deformation monitoring.
Background
Deformation monitoring of tunnel surrounding rocks is carried out during tunnel engineering construction, deformation information of the tunnel surrounding rocks is mastered in time, safety risks of tunnel construction can be reduced, construction parameters and construction technology processes are corrected, and engineering safety quality is guaranteed.
The existing tunnel deformation monitoring systems are many and mostly adopt three modes: firstly, an embedded stress-strain sensor is adopted, a deformation value of tunnel surrounding rock is collected through the sensor, the defects are that the function is single, the reliability is poor, and the sensor is buried in concrete, once the sensor is damaged, the recovery difficulty is high, so another two monitoring methods are generally adopted, one is that a total station is placed on an inverted arch of a tunnel, the three-dimensional coordinates of the total station are determined through modes such as freely building a station and the like, and then the total station is manually operated to align an observation point, namely a reflector or a prism on a measuring pile, so as to obtain the three-dimensional coordinates of the observation point; the third method is to obtain the distance between two points by means of laser distance measuring instrument correlation to obtain clearance change so as to obtain elevation change through calculation.
Usually, the measuring pile extends out of the tunnel wall by about 3 to 10cm to facilitate the alignment of the total station, but because the construction site environment is complicated, the measuring pile is very easy to be damaged or the position of a reflector or a prism is changed due to the impact of flying stones generated in the process of collision or blasting of an excavator in the use process, so that the deformation monitoring work cannot be carried out. At the moment, the measuring pile needs to be installed again, but the installing of the measuring pile brings a series of new problems, firstly, the distance between the installing position of the measuring pile and the ground of the tunnel is high, and if the arch crown measuring pile is more than 5m away from the ground of the tunnel, the installation is very difficult; secondly, after reinstallation, the accumulated deformation after the primary support construction cannot be accurately obtained.
Therefore, how to set a measuring pile which is not easy to damage and can accurately reflect the deformation condition of the surrounding rock is a problem to be solved urgently in tunnel engineering construction.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of how to set up a measuring pile which is not easy to damage and can accurately reflect the deformation condition of surrounding rocks; in order to solve the technical problem, the utility model provides an embedded measuring pile for tunnel deformation monitoring, including the measuring stick that inserts the outside end slope cutting in the tunnel country rock, be equipped with a protection box that draws in the bottom inwards at the end of measuring stick, the angle of inclination of the connecting inclined plane of protection box is unanimous with the measuring stick end angle of inclination after the cutting, and measuring stick after the cutting passes through connecting inclined plane fixed connection in inclined plane surface center department with the protection box; the first light reflecting sticker is arranged at the center of the inner surface of the connecting inclined plane and serves as an observation point; still include before the tunnel whitewashing overlap locate the outside protective cover of protection box, protection box and protective cover all set up in the mounting groove who is absorbed in the tunnel wall and all have the insulated joint between protection box and protective cover and the tunnel wall.
Particularly, a cutting groove is reserved on the contact surface of the inner side of the protective cover and the protective box.
Particularly, a second reflective sticker serving as a target point of the laser range finder is arranged on the inner side of the bottom surface of the protection box.
The utility model has the advantages that: the utility model can collect the first reflective sticker and the second reflective sticker as observation points into the side wall of the tunnel through the mounting groove, thereby preventing the damage of the measuring pile caused by the impact of flying stones generated in the process of collision or blasting of the excavator; make the device be convenient for pile up in the transportation through box-like design, device simple structure simultaneously, low cost, convenient to use has very positive effect to the fragile problem of measurement stake that meets in solving the actual work progress.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a usage state diagram of the present invention.
Fig. 3 is a state diagram of the laser range finder correlation mode of the present invention.
Wherein, the measuring rod-1; a protective box-2; a first reflective sticker-3; a second reflective sticker-31; a protective cover-4; cutting a groove-41; mounting a groove-5; and a separation slit-51.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
An embedded measuring pile for monitoring tunnel deformation comprises a measuring rod 1 inserted into tunnel surrounding rock and having an outer tail end subjected to inclined cutting, wherein a protective box 2 with the bottom folded inwards is arranged at the tail end of the measuring rod 1, the inclined angle of a connecting inclined plane of the protective box 2 is consistent with the inclined angle of the tail end of the measuring rod 1 after cutting, and the measuring rod 1 and the protective box 2 after cutting are fixedly connected to the center of the outer surface of the inclined plane through the connecting inclined plane; the first light reflecting sticker 3 is arranged at the center of the inner surface of the connecting inclined plane and serves as an observation point; still include before the tunnel whitewashing the cover locate protection box 2 outside protective cover 4, protection box 2 and protective cover 4 all set up in embedding tunnel wall in the mounting groove 5 and all have isolation gap 51 between protection box 2 and protective cover 4 and the tunnel wall.
As a preferred embodiment, the top surface of the protecting cover 4 is provided with a cut groove 41 on the outer side near the edge.
As a preferred embodiment, the inner side of the bottom surface of the protective box 2 is provided with a second reflective sticker 31 as a target point of the laser range finder.
The principle of the utility model is that: the transverse deformation generated in the surrounding rock is conducted to the tail end of the measuring rod 1 through the measuring rod 1 which is driven into the tunnel surrounding rock and is in close contact with the surrounding rock, and the deformation is conducted to the first light reflecting sticker 3 on the inner side of the connecting inclined plane fixedly connected with the measuring rod 1 of the protection box 2 through the fixing of the connecting inclined plane of the protection box 2; measuring the initial space coordinate of the first light reflecting sticker 3 in the initial state by using a total station; measuring the spatial coordinates of the first retro-reflective sticker 3 again after a period of time has elapsed yields the change in displacement of the first retro-reflective sticker 3 that occurred during the two measurements.
Because current measurement stake is for the convenience of measuring, need stretch out tunnel wall 3 to 10cm under the normal condition to it damages because the flying stone that excavator collision or blasting in-process produced strikes and leads to measuring the stake easily, consequently the utility model discloses a set up the terminal measuring point of measuring the stake in tunnel wall, can effectively reduce the emergence of above-mentioned condition, thereby can both gain better technological effect to practicing thrift measurement cost, reducing because a series of problems such as the unable accurate measurement of the accumulative total deflection that leads to because measuring the stake damage or warp. Simultaneously through establish protective cover 4 at the outside cover of protection box 2 before the tunnel whitewashing, can effectively protect the measuring point not influenced at the whitewashing in-process, treat that whitewashing process finishes after with protective cover 4 along digging groove 41 chisel brokenly and take off, can spill the measuring point. Meanwhile, the isolation slit 51 can prevent the problems of deformation resistance and inaccurate deformation conduction caused by the contact of the side surfaces of the protection box 2 and the protection cover 4 with the tunnel wall; the bottom of the protective box 2 is folded to facilitate stacking in the transportation process, so that the occupied space is reduced, and the transportation is facilitated.
The utility model discloses can also be used to use under the operating mode of laser range finder measurement deflection: through setting up in the utility model discloses laser range finder opposite measures laser range finder and the second reflects light and pastes the initial distance between 31, measures the distance between laser range finder and the second reflects light and pastes 31 again after measuring the interval, calculates the distance change.
The utility model discloses "connect", "fixed" that appear in the description can be fixed connection, machine-shaping, welding, also can mechanical connection, and particular case understands that the aforesaid belongs to the utility model provides a concrete meaning.
In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., are used, and their designated orientations or positional relationships are only for convenience of description and simplicity of description, but do not indicate or imply that the designated device or element must have a particular orientation, and therefore should not be construed as limiting the present invention.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (3)
1. The embedded measuring pile for monitoring the tunnel deformation is characterized by comprising a measuring rod (1) inserted into tunnel surrounding rock and obliquely cut at the outer tail end, wherein a protective box (2) with the bottom folded inwards is arranged at the tail end of the measuring rod (1), the inclined angle of a connecting inclined plane of the protective box (2) is consistent with the inclined angle of the tail end of the cut measuring rod (1), and the cut measuring rod (1) and the protective box (2) are fixedly connected to the center of the outer surface of the connecting inclined plane through the inclined plane; the system also comprises a first light reflecting sticker (3) which is arranged at the center of the inner surface of the inclined plane and is used as an observation point of the total station; still include before the tunnel whitewashing cover locate protection box (2) outside protective cover (4), protection box (2) and protective cover (4) all set up in embedding mounting groove (5) in the tunnel wall and all have separation joint (51) between protection box (2) and protective cover (4) and the tunnel wall.
2. An embedded measuring pile for tunnel deformation monitoring according to claim 1, characterized in that the top surface of the protecting cover (4) is provided with a cut groove (41) on the outside near the edge.
3. The embedded measuring pile for tunnel deformation monitoring as claimed in claim 1, characterized in that the inside of the bottom surface of the protective box (2) is provided with a second reflective sticker (31) as a target point of a laser range finder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021427358.XU CN212747693U (en) | 2020-07-20 | 2020-07-20 | Embedded measuring pile for monitoring tunnel deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021427358.XU CN212747693U (en) | 2020-07-20 | 2020-07-20 | Embedded measuring pile for monitoring tunnel deformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212747693U true CN212747693U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021427358.XU Active CN212747693U (en) | 2020-07-20 | 2020-07-20 | Embedded measuring pile for monitoring tunnel deformation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212747693U (en) |
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2020
- 2020-07-20 CN CN202021427358.XU patent/CN212747693U/en active Active
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