CN204532429U - A kind of detachable and that precision is high convergence monitoring is linked up with - Google Patents

Abstract

The utility model discloses a detachable and high-precision tunnel convergence monitoring hook. Closely connected, the deformation is consistent; there is a cover on the casing, and a slot is provided inside the casing, and the convergence tray is connected with the casing through the slot; The deformation of the surrounding rock at different depths is monitored by adjusting the length of the casing and the position of the casing slot; a compression spring is provided in the convergence tray. After the monitoring task is completed, the convergence tray can be taken out by moving the spring paddle to compress the spring and used for the next step. 1. Monitoring of monitoring sections. By adopting the utility model, the collision of the construction machinery to the convergence hook can be avoided, the repeated labor of the monitoring personnel can be reduced, and the monitoring and measurement accuracy can be improved; the corrosion of the hook by groundwater can be avoided, and the service life of the hook can be improved; the convergence tray can be used repeatedly, thus reducing the monitoring cost .

Description

A detachable and high-precision tunnel convergence monitoring hook

technical field

The utility model relates to the field of monitoring during tunnel construction, in particular to a detachable and high-precision tunnel convergence monitoring hook suitable for tunnel monitoring.

It can avoid the collision of construction machinery on the convergence hook; avoid the corrosion of groundwater on the hook; the hook can be repeated and used to improve the service life of the hook and reduce the monitoring cost.

Background technique

Tunnel monitoring and measurement is one of the three pillars of the new Austrian method, which plays an important role in the adjustment of construction technology, the selection of support structures and the selection of support structure parameters during tunnel construction. During tunnel construction, in order to ensure the stability of the surrounding rock around the tunnel and the safety of the tunnel itself, it is necessary to monitor and measure the tunnel during construction.

With the rapid development of urban subway tunnels, the monitoring work in tunnel construction has attracted more and more attention from the owners and construction parties. In tunnel monitoring and measurement work, tunnel convergence monitoring plays an important role in judging the stability of surrounding rock and the rationality of construction methods. Therefore, tunnel convergence is a must-test item in tunnel monitoring and measurement. At present, the tunnel convergence is mainly monitored by the tunnel convergence meter, and the tunnel convergence meter cooperates with the convergence hook to monitor. Convergence hooks are arranged on the side wall of the tunnel with expansion bolts with hooks. After the surrounding rock of the tunnel is excavated, shotcrete needs to be carried out; this results in the expansion bolts with hooks having to be laid after the shotcrete is completed, otherwise the expansion bolts will be covered by shotcrete . Expansion bolts with hooks are applied after sprayed concrete, which prevents the deformation of the tunnel from being monitored. According to engineering experience and related theories, the deformation of the tunnel surrounding rock is the largest between the completion of tunnel excavation and the application of shotcrete , the greater the impact on the stability of the tunnel.

Expansion bolts with hooks are arranged on the side wall of the tunnel. Since there are often construction machinery such as loaders and excavators in the tunnel, the expansion bolts are often touched by construction machinery; the slightest will cause the hook to tilt, and the severest will cause direct damage to the hook. According to the relevant monitoring specifications, the monitoring data should ensure continuity and reliability. However, if the hook is damaged by construction machinery, the continuity and reliability of monitoring data cannot be guaranteed. There is often groundwater in the tunnel, and the expansion bolt with hook is in a humid environment all the year round, which makes the hook display easy to rust, and the rust of the hook will easily lead to monitoring errors. At present, the tunnels under construction are relatively long. According to the monitoring regulations, a monitoring section should be arranged at an interval of 5-10m in the tunnel. After such a tunnel is built, many convergence hooks need to be laid. Most of the current convergence hooks are permanent and cannot be recovered. Greatly increased monitoring costs, resulting in a waste of resources.

The above-mentioned factors indicate that the current tunnel convergence monitoring work has various deficiencies in the convergence hook. These factors restrict the accuracy of the tunnel monitoring work and increase the monitoring cost. Therefore, there is an urgent need to develop a tunnel convergence hook with high monitoring accuracy, long service life, safety, reliability and economy.

Utility model content

(1) Technical problems to be solved

In order to solve the above problems, the utility model proposes a detachable and high-precision tunnel convergence monitoring hook. A protective sleeve is arranged around the convergence hook to improve the service life of the hook without increasing construction difficulty and project cost. Monitoring accuracy, in order to avoid damage to the convergence hook by construction machinery and groundwater; in addition, by setting a compression spring in the convergence tray, the convergence tray can be taken out and reused after the monitoring task is completed, thereby reducing the monitoring cost.

(2) Technical solution

The utility model provides a detachable and high-precision tunnel convergence monitoring hook, thereby reducing the collision of tunnel construction machinery on the convergence hook, ensuring the convergence monitoring accuracy, avoiding the corrosion of the hook by groundwater, and reducing the monitoring cost by repeating the convergence member.

The utility model adopts the following technical solutions to solve the above technical problems: a detachable and high-precision tunnel convergence monitoring hook, its main structure includes: connecting wire hook, flexible connecting wire, protective tube cover, protective tube, barb thorn , Convergence hook, Convergence tray, Casing slot, Retractable bayonet, Compression spring, Spring paddle, Spring slot, It is characterized in that: There are barbs on the casing; Connecting line hooks are set on one side of the casing; The protective tube cover is connected with a flexible connecting line; the protective tube cover is bound and connected with the connecting line hook through the flexible connecting line; the protective tube is provided with two protective tube slots;

The convergence hook and the convergence tray are connected by welding;

A compression spring is installed inside the convergence tray;

There are two spring grooves on one side of the convergent tray;

The end of the compression spring is provided with a retractable bayonet;

One side of the compression spring is provided with a spring plectrum.

The above-mentioned length of the casing and the position of the slot of the casing can be determined according to the position where the deformation needs to be monitored.

The top of the above-mentioned convergence hook can be connected to the convergence ruler joint in the tunnel convergence gauge.

The length of the above-mentioned spring groove is twice the length of the retractable chuck.

The above-mentioned converging tray is connected with the casing through a retractable chuck, and the converging tray can be recycled after the monitoring work is completed.

(3) Beneficial effects

Compared with the prior art, the utility model has the following beneficial effects:

The utility model cleverly improves the convergence hook of the tunnel, so as to realize the convergence hook from the influence of construction and ensure the accuracy of convergence monitoring; the protective tube is used to ensure the convergence hook is protected from groundwater erosion, making long-term monitoring possible; in addition, the detachable method is adopted The convergence hook is assembled so that the convergence hook can be used repeatedly with different monitoring sections, thereby reducing the monitoring cost. Above shows and described the basic structure and using method of the present utility model. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. On the premise of not departing from the spirit and scope of the utility model, the utility model also has various changes and improvements, and these changes and improvements all fall into the Within the scope of the utility model required to be protected, the utility model requires the scope of protection to be defined by the appended claims and their equivalents.

Description of drawings

Fig. 1 is a structural schematic diagram of a detachable tunnel convergence monitoring hook with high monitoring accuracy according to the present invention.

In the figure, 1-connecting line hook, 2-flexible connecting line, 3-casing cover, 4-casing, 5-barb thorn, 6-converging hook, 7-converging tray, 8-casing slot, 9 -Retractable bayonet, 10-compression spring, 11-spring pick, 12-spring slot.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in FIG. 1 , the embodiment of the present invention provides a detachable tunnel convergence monitoring hook with high monitoring accuracy. Its main structures are: connecting wire hook 1, flexible connecting wire 2, casing cover 3, casing 4, barb thorns 5, convergence hook 6, convergence tray 7, casing slot 8, retractable bayonet 9, compression Spring 10, spring paddle 11, spring groove 12, barb thorns 5 are provided on the protective tube 4; connecting line hook 1 is arranged on one side of the protective tube 4; flexible connecting line 2 is connected to the protective tube cover; The protective tube cover 3 is bound and connected with the connecting line hook 1 through the flexible connecting line 2; the protective tube 4 is provided with two protective tube slots 8;

The convergence hook 6 and the convergence tray 7 are connected by welding;

A compression spring 10 is installed inside the convergence tray 7;

Two spring grooves 8 are provided on one side of the convergent tray 7;

The end of the compression spring 10 is provided with a retractable bayonet 9;

One side of the compression spring 10 is provided with a spring plectrum 11 .

The length of described casing 4 and the position of casing clamping groove 8 can be determined according to the rock position that needs monitoring.

The top of the convergence hook 6 can be connected to the convergence ruler joint in the tunnel convergence gauge.

The length of the spring groove 12 is twice the length of the retractable chuck 9 .

The convergence tray 7 is connected with the casing 4 through the retractable chuck 9, and the convergence tray 7 can be recycled after the monitoring work is completed.

The connecting wire hook 1 is at an angle of 15-30° with the lower casing, and has a length of about 5 cm.

Described flexible connecting wire 2, one section is tied on the connecting wire hook, and the other end is bound and connected with casing cover 3.

The casing cover 3 is circular and made of plastic, and its diameter is consistent with that of the casing.

The casing 4 is a hollow cylindrical member and only the bottom is sealed. The diameter of the casing 4 is about 5cm, and the length can be determined according to the surrounding rock position to be monitored.

Barb thorns 5 are arranged on the casing 4, and the barb thorns can be firmly connected with the anchoring agent around the casing, so that the deformation of the casing is consistent with that of the surrounding rock around the tunnel. And the casing 4 is provided with two casing slots 8 near the body.

The barb thorns 5 are at an angle of 20-30° with the casing, the length is about 2cm, and the distance along the casing is 4cm.

The apex of the convergent hook 6 is arranged as an equilateral triangle, and the side length of the triangle is about 3 cm. The convergence hook adopts a 6-triangular structure to ensure that the hook on the tunnel convergence meter is hung at the same position every time, reducing the convergence monitoring error. It is connected with the convergence member 7 by welding.

A brief description will be given below for the operation of the utility model when it is used for tunnel convergence monitoring. First use the pneumatic drilling rig to drill holes on the side wall of the tunnel, the drilling depth is 3-4cm larger than the casing length, and the drilling diameter is 3-4cm larger than the casing diameter. After the borehole is drilled, the floating soil in the borehole is cleaned, and then the anchoring agent is used to fill the borehole, and then the casing is inserted into the borehole. At this time, the tunnel convergence member and the convergence hook can be installed, and the convergence member and the convergence hook have been connected by welding before. At this time, the retractable bayonet at the bottom of the convergent member is retracted into the convergent member, and the convergent member is put into the casing. Rotate the convergent member while pushing it in until the convergent member snaps into the groove of the casing. Thereafter, one end of the flexible cable is tied to the cable hook, and the other end is connected to the casing cover. After the anchoring agent around the casing reaches a certain strength, the tunnel convergence monitoring can be carried out. The hanger at one end of the steel ruler of the tunnel convergence gauge is connected to the convergence hook for monitoring. After each convergence monitoring work is completed, the casing cover is installed on the casing. On the top of the tube, open the cover for the next monitoring. After the section monitoring work is completed, use long tweezers to clamp the two spring picks of the spring so that the retractable bayonet retracts back to the convergence rod, and use the convergence gauge hook to connect the convergence hook to pull the convergence member out of the casing; The flexible connection line between the casing cover and the connection line hook; the convergence bar and the casing cover can be repeatedly used for convergence monitoring of other sections.

The above-mentioned embodiments are only descriptions of preferred implementations of the present utility model, and are not intended to limit the concept and scope of the present utility model. Under the premise of not departing from the design concept of the present utility model, various modifications and improvements made by ordinary persons in the art to the technical solution of the present utility model should fall into the protection scope of the present utility model, and the technology claimed by the utility model The contents are all described in the claims.

Claims (5)

1. A detachable and high-precision tunnel convergence monitoring hook, its main structure includes: connecting wire hook (1), flexible connecting wire (2), protective tube cover (3), protective tube (4), barb thorn (5), Convergence Hook (6), Convergence Tray (7), Casing Slot (8), Retractable Bayonet (9), Compression Spring (10), Spring Pick (11), Spring Slot (12) , is characterized in that: described casing (4) is provided with barb thorn (5); One side of casing (4) is provided with connecting wire hook (1); Described casing cover is connected with flexible connecting wire ( 2); the casing cover (3) is bound and connected with the connecting wire hook (1) through the flexible connection line (2); the casing (4) is provided with two casing slots (8); The convergence hook (6) is connected with the convergence tray (7) by welding; A compression spring (10) is installed inside the convergence tray (7); Two spring grooves (8) are opened on one side of the convergent tray (7); The end of the compression spring (10) is provided with a retractable bayonet (9); A spring plectrum (11) is arranged on one side of the compression spring (10). 2. A detachable and high-precision tunnel convergence monitoring hook according to claim 1, characterized in that the length of the casing (4) and the position of the casing slot (8) can be monitored as required The location of the rock is determined. 3. A detachable and high-precision tunnel convergence monitoring hook according to claim 1, characterized in that the top of the convergence hook (6) is arranged in an equilateral triangle. 4. A detachable and high-precision tunnel convergence monitoring hook according to claim 1, characterized in that the length of the spring groove (12) is twice the length of the retractable chuck (9). 5. A detachable and high-precision tunnel convergence monitoring hook according to claim 1, characterized in that the convergence tray (7) is connected with the casing (4) through a retractable chuck (9), After the monitoring work is completed, the convergence tray (7) can be recycled.