CN215218354U

CN215218354U - Be used for experimental detection device of tunnel embedded channel resistance to plucking

Info

Publication number: CN215218354U
Application number: CN202121082676.1U
Authority: CN
Inventors: 朱利明; 邵毅安; 卓静超; 徐松; 王刚; 刘良金
Original assignee: Nanjing Gongda Bridge And Tunnel And Rail Transit Research Institute Co ltd
Current assignee: Nanjing Gongda Bridge And Tunnel And Rail Transit Research Institute Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-12-17
Anticipated expiration: 2031-05-19

Abstract

The utility model discloses a detection device for a tunnel pre-buried channel uplift test, which comprises a pre-buried channel, wherein the bottom of the pre-buried channel is provided with a dovetail groove to be detected, and a second T-shaped bolt with a stud section extending out of the dovetail groove is connected in the dovetail groove; the top end of the connecting sleeve is in threaded connection with the stud section of the second T-shaped bolt, and the bottom end of the connecting sleeve is connected with a threaded extension rod; the screw thread extension rod penetrates through the mounting hole of the counter-force supporting device, and the bottom end of the screw thread extension rod extends out of the mounting hole; the body of rod external fixation that the screw extension bar stretches out the mounting hole is equipped with a punching formula and draws detection device, draws detection device and can push away counter-force strutting arrangement in order to draw the screw extension bar downwards, and then the screw extension bar draws second T type bolt through adapter sleeve to further transmit the pulling force for pre-buried channel. The utility model has the advantages of need not to weld extension bar and can carry out the withdrawal resistance to the pre-buried channel and detect.

Description

Be used for experimental detection device of tunnel embedded channel resistance to plucking

Technical Field

The utility model relates to a track traffic technical field especially relates to a be used for experimental detection device of tunnel pre-buried channel resistance to plucking.

Background

The overhead line system is used as a power supply line of a high-speed rail line, the electrified overhead line system needs to be supplied with power in the whole high-speed rail line, and the overhead line system also needs to be installed in a tunnel. Due to the limited space in the tunnel, the contact network cable can only be hung on the suspension arm at the top of the tunnel, and the suspension arm is arranged in the embedded channel. In the construction process of the modern high-speed rail, the technical scheme of the embedded channel does not need other operations during construction, and the tunnel structure cannot be damaged. Therefore, the technical scheme of installing the contact net in the high-speed rail tunnel by adopting the embedded channel is more and more accepted by railway departments and construction units.

Although the overhead line system suspension arm in the tunnel is fixed by adopting the overhead line system embedded channel, the problem that the anti-pulling performance of the embedded channel is insufficient is often found in construction, and the anti-pulling performance of the embedded channel directly influences the operation safety of the high-speed railway. Meanwhile, because the T-shaped bolt connected with the channel is short, the jack providing the drawing force cannot directly stretch the bolt, and the traditional detection method is to weld an extension bar at the end part of the exposed end of the bolt so as to facilitate the drawing of the jack. This method has high requirements on welding and also increases the risk. Therefore, it is urgently needed to develop a detection device for a tunnel embedded channel anti-pulling test.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of mentioning among the background art, provide a be used for tunnel embedded channel resistance to plucking test detection device, this detection device has and just can accomplish the advantage that the tensile strength of pulling out to embedded channel detects need not to weld the extension bar.

In order to realize the technical purpose, the utility model discloses the technical scheme who takes does:

a detection device for a tunnel embedded channel anti-pulling test comprises a vertical connecting sleeve, wherein an inner thread is arranged on the inner wall of a cylinder body of the connecting sleeve, a second T-shaped bolt and a threaded extension rod which are screwed between the inner walls of the connecting sleeve are correspondingly arranged at the upper end and the lower end of the connecting sleeve respectively, and the top of the second T-shaped bolt is connected to an embedded channel;

the counter-force supporting device is fixed below the embedded channel and is provided with a vertical mounting hole, and the threaded lengthening rod penetrates through the mounting hole of the counter-force supporting device and the bottom end of the threaded lengthening rod extends out of the mounting hole; the body of rod external fixation that the screw extension bar stretches out the mounting hole is equipped with a punching formula and draws detection device, draw detection device can push away counter-force strutting arrangement in order to draw the screw extension bar downwards, and then the screw extension bar passes through the adapter sleeve draws second T type bolt to further transmit the pulling force for pre-buried channel.

Preferably, the top of the pre-buried channel is provided with an anchoring piece, and the pre-buried installation of the pre-buried channel is completed by fixing the anchoring piece in reinforced concrete of the tunnel.

Preferably, the reaction force supporting device is a reaction frame, and the reaction frame is connected below the embedded channel in a hanging mode through a first T-shaped bolt and a third T-shaped bolt and is fixed through a nut.

Preferably, the bottom of the reaction frame is provided with two bilaterally symmetrical gradienters through gluing, and the two bilaterally symmetrical gradienters are used for monitoring whether the reaction frame is horizontally arranged.

Preferably, the top four corners of reaction frame all is equipped with an adjusting part, the adjusting part is including the square backing sheet that is fixed in screw rod and screw rod top on the reaction frame, the top surface of square backing sheet supports to lean on to connect in the tunnel on the secondary lining outer wall, through adjusting four the adjusting part can adjust the reaction frame and be in horizontal position.

Preferably, a rubber gasket is arranged between the square supporting sheet and the secondary lining.

Preferably, draw detection device including the punching jack, draw the appearance ground tackle and with the jack force (forcing) pump that the jack is connected, the jack sets up in the body of rod outside of screw thread extension bar, the bottom of jack is through drawing the anchor between appearance ground tackle and the screw thread extension bar, the top of jack sets up with bottom one side of reaction frame is relative, thereby the jack force (forcing) pump can be through adding oil pressure for the jack and make its top push up the reaction frame and exert decurrent pulling force to the screw thread extension bar.

Preferably, the material of screw extension pole is screw-thread steel, and screw extension pole slightly is greater than the length of jack.

The utility model has the advantages of it is following:

1. this detection device sets up connecting sleeve below the second T type bolt in the buried channel, and connect a screw extension bar in connecting sleeve's bottom, and it is fixed with the screw extension bar with the bottom of jack through drawing the appearance ground tackle, pull the screw extension bar with the reversal through the top pushing reaction frame, and then transmit the pulling force to the buried channel on, and then the tensile that detects buried channel and can bear pulls out the load, need not to weld the extension bar in addition, detection efficiency nature and security have been improved.

2. The detection device comprises a connecting sleeve, a threaded extension rod, a reaction frame and an anti-pulling detection device which are detachably arranged, is convenient and quick to install, can be conveniently detached when not needed, and does not occupy the land for a construction site.

3. This detection device is through setting up the reaction frame to can be in the horizontality through spirit level and adjusting part real-time adjustment reaction frame, and then provide reverse support for jack and screw extension bar, make the testing result more accurate.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic top view of the reaction frame of FIG. 1;

FIG. 3 is a schematic top view of the reaction frame of FIG. 1;

fig. 4 is a schematic side view of the present invention;

fig. 5 is a schematic view of the coupling sleeve and its components of fig. 1.

The label names in the figure: the device comprises a pre-buried channel 1, a first T-shaped bolt 2-1, a second T-shaped bolt 2, a third T-shaped bolt 2-2, a secondary lining 3, an adjusting piece 4, a rubber gasket 5, a connecting sleeve 6, a reaction frame 7, a jack 8, a drawing instrument anchorage device 9, a threaded lengthening rod 10, a level gauge 11 and a nut 12.

Detailed Description

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is to be understood that the described embodiments are merely illustrative of some, but not all embodiments of the invention.

Referring to fig. 1-5, the device for detecting the uplift resistance test of the tunnel embedded channel of the embodiment includes a connecting sleeve 6, a T-shaped bolt, a counter force supporting device, a threaded extension rod 10 and a pull-out detecting device.

Referring to fig. 1, the top of the pre-buried channel 1 is provided with an anchoring piece, and pre-buried installation of the pre-buried channel 1 is completed by fixing the anchoring piece in reinforced concrete of a tunnel; the bottom of embedded channel 1 is the dovetail, and second T type bolt 2 is connected in the dovetail and its stud section stretches out from the inslot, through the end that stretches out of drawing second T type bolt 2 and with the help of second T type bolt 2 with the pull-out force transmission for embedded channel 1, and then accomplish the detection of embedded channel 1 withdrawal resistance.

In the embodiment, the connecting sleeve 6 is a steel sleeve structure with threads arranged inside, the top end of the connecting sleeve is in threaded connection with a stud section of the second T-shaped bolt 2 arranged in a dovetail groove of the embedded channel 1, and the bottom end of the connecting sleeve is in threaded connection with the threaded extension rod 10; counter-force strutting arrangement is fixed in the below of embedded channel 1, be equipped with the mounting hole that a vertical link up on the counter-force strutting arrangement, screw extension bar 10 runs through counter-force strutting arrangement's mounting hole and its bottom stretches out the mounting hole, the body of rod external fixation that screw extension bar 10 stretched out the mounting hole is equipped with a punching type and draws detection device, push up counter-force strutting arrangement through drawing detection device, and then draw screw extension bar 10 downwards, and then screw extension bar 10 can draw second T type bolt 2 through connecting sleeve 6 and will draw the power transmission for embedded channel 1 through second T type bolt 2, thereby constantly exert detection load to embedded channel 1.

Referring to fig. 2-4, the counter force supporting device is a counter force frame 7, a first T-shaped bolt 2-1 and a third T-shaped bolt 2-2 are further connected in a dovetail groove of the embedded channel 1, and the counter force frame 7 is connected below the embedded channel 1 in a hanging mode through the first T-shaped bolt 2-1 and the third T-shaped bolt 2-2 and is fixed through a nut.

In this embodiment, the gradienters 11 are connected to the bottom of the reaction frame 7 through glue, and the number of the gradienters is preferably 2 and the gradienters are symmetrically arranged on the left side and the right side; the top four corners of reaction frame 7 all is equipped with an adjusting part 4, and adjusting part 4 is including being fixed in the square backing sheet at screw rod and the screw rod top on the reaction frame 7, and the top surface of square backing sheet supports to lean on connecting in the tunnel on 3 outer walls of secondary lining, can also set up rubber gasket 5 between square backing sheet and the secondary lining 3.

In this embodiment, draw detection device including punching jack 8, draw appearance ground tackle 9 and the jack force (forcing) pump that is connected with jack 8, jack 8 sets up in the body of rod outside of screw thread extension bar 10, the bottom of jack 8 is through drawing the anchor between appearance ground tackle 9 and the screw thread extension bar 10, the top of jack 8 sets up with bottom one side of reaction frame 7 relatively, start the jack force (forcing) pump, thereby jack 8 can exert decurrent pulling force to screw thread extension bar 10 through top thrust reaction frame 7.

Wherein the reaction frame 7 is formed by welding profile steels, and the reaction frame 7 is provided with a hollow inner cavity; the material of the screw extension rod 10 is screw steel, and the length of the screw extension rod 10 is slightly larger than that of the jack 8.

The operation steps of the utility model are as follows:

step 1: fixing the first T-shaped bolt 2-1 and the third T-shaped bolt 2-2 on the reaction frame 7 through nuts;

step 2: the second T-shaped bolt 2 is connected with the connecting sleeve 6 through threads and penetrates through a mounting hole of the reaction frame 7;

and step 3: the screw extension rod 10 passes through the jack 8 and is screwed with the connecting sleeve 6 through screw threads;

and 4, step 4: the exposed threaded extension bar 10 is anchored to the jack 8 using a puller anchorage 9.

And 5: and installing a first T-shaped bolt 2-1, a second T-shaped bolt 2 and a third T-shaped bolt 2-2 on a dovetail groove of the embedded channel 1.

Step 6: rubber spacers 5 are placed between the secondary lining 3 and the square support sheet on the adjusting screw 4.

And 7: the gradienters 11 are arranged at two sides of the bottom of the reaction frame 7.

And 8: the reaction frame 7 is leveled by adjusting the adjusting bolts 4 of the reaction frame 7 and observing the level gauge 11 at the same time.

And step 9: and (3) opening the jack 8, enabling the jack 8 to generate drawing force on the threaded extension rod 10, transmitting the force to the second T-shaped bolt 2 through the connecting sleeve 6, transmitting the drawing force to the embedded channel 1 by the second T-shaped bolt 2, and finishing loading when the allowable load of detection is reached.

Step 10: and waiting for a specified time, and observing whether the deformation conditions of the channel and the periphery of the channel meet the standard requirements or not.

Step 11: and (4) closing the jack 8, dismounting the anchor 9 of the drawing instrument, and taking out the whole device by taking out the T-shaped bolt, thereby completing the drawing force detection of the embedded channel.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.

Claims

1. The device for detecting the anti-pulling test of the tunnel embedded channel is characterized by comprising a vertical connecting sleeve (6), wherein an inner thread is arranged on the inner wall of a cylinder body of the connecting sleeve (6), a second T-shaped bolt (2) and a threaded extension rod (10) which are screwed between the inner walls of the connecting sleeve (6) are correspondingly arranged at the upper end and the lower end of the connecting sleeve (6) respectively, and the top of the second T-shaped bolt (2) is connected to the embedded channel (1);

the anti-force device is fixed below the embedded channel (1), a vertical mounting hole is formed in the anti-force support device, and the threaded extension rod (10) penetrates through the mounting hole of the anti-force support device and the bottom end of the threaded extension rod extends out of the mounting hole; the external fixation of the body of rod that threaded extension bar (10) stretched out the mounting hole is equipped with a punching type and draws detection device, draw detection device can push away counter-force strutting arrangement in order to draw threaded extension bar (10) downwards, and then threaded extension bar (10) pass through connecting sleeve (6) are drawn second T type bolt (2) to further transmit the pulling force for pre-buried channel (1).

2. The device for detecting the uplift test of the tunnel embedded channel according to claim 1, is characterized in that: the top of the embedded channel (1) is provided with an anchoring piece, and the anchoring piece is fixed in reinforced concrete of the tunnel to complete embedded installation of the embedded channel (1).

3. The device for detecting the uplift test of the tunnel embedded channel according to claim 2, is characterized in that: the reaction force supporting device is a reaction frame (7), and the reaction frame (7) is connected below the embedded channel (1) in a hanging mode through a first T-shaped bolt (2-1) and a third T-shaped bolt (2-2) and is fixed through a nut.

4. The device for detecting the uplift test of the tunnel embedded channel according to claim 3, characterized in that: the bottom of the reaction frame (7) is provided with two bilaterally symmetrical gradienters (11) through gluing, and the gradienters are used for monitoring whether the reaction frame (7) is horizontally arranged.

5. The device for detecting the uplift test of the tunnel embedded channel according to claim 4, is characterized in that: the top four corners of reaction frame (7) all is equipped with an adjusting part (4), adjusting part (4) are including being fixed in screw rod and the square backing sheet at screw rod top on reaction frame (7), the top surface of square backing sheet supports to lean on to connect in the tunnel on secondary lining (3) outer wall, through adjusting four adjusting part (4) can adjust reaction frame (7) and be in horizontal position.

6. The device for detecting the uplift test of the tunnel embedded channel according to claim 5, is characterized in that: and a rubber gasket (5) can be arranged between the square supporting sheet and the secondary lining (3).

7. The device for detecting the uplift test of the tunnel embedded channel according to any one of claims 3 to 6, wherein: draw detection device includes straight-through jack (8), draws appearance ground tackle (9) and the jack force (forcing) pump that is connected with jack (8), jack (8) set up in the body of rod outside of screw thread extension bar (10), the bottom of jack (8) is through drawing anchor (9) and screw thread extension bar (10) between the anchor, the top of jack (8) sets up with bottom one side of reaction frame (7) relatively, thereby jack force (forcing) pump can be through applying decurrent pulling force to screw thread extension bar (10) for jack (8) pressure oil makes its top push up reaction frame (7).

8. The device for detecting the uplift test of the tunnel embedded channel according to claim 7, is characterized in that: the screw thread extension rod (10) is made of screw thread steel, and the length of the screw thread extension rod (10) is slightly larger than that of the jack (8).