CN201753610U

CN201753610U - Connecting anchor bolt

Info

Publication number: CN201753610U
Application number: CN2009203101155U
Authority: CN
Inventors: 朱颖彦
Original assignee: Institute of Mountain Hazards and Environment IMHE of CAS
Current assignee: Institute of Mountain Hazards and Environment IMHE of CAS
Priority date: 2009-09-10
Filing date: 2009-09-10
Publication date: 2011-03-02
Anticipated expiration: 2019-09-10

Abstract

The utility model discloses a connecting anchor bolt, which aims to overcome the shortage that connecting anchor bolts in the prior art are inconvenient in use in narrow construction space. Different components of the anchor bolt are connected in a thread connection manner, and threads of the components which are connected in sequence are spaced mutually in different spiral directions, so that the components of the anchor bolt can be connected by means of rotating the connecting sleeves rather than rotating other components when in connection of the anchor bolt. Based on the connected anchor bolt, the utility model further provides an anchor bolt capable of being connected and provided with a grating sensor. When the anchor bolt is lengthened via connection, distributed measurement of stress can be realized conveniently by means of connecting corresponding optical fiber joints, thereby realizing long-term accurate monitoring of stress change of the anchor bolt. Compared with the prior art, the connecting anchor bolt is simple in structure and process, low in cost and convenient in operation and use.

Description

A kind of mountable anchor pole

Technical field

The utility model relates to a kind of anchor pole, particularly relates to a kind of extensible and can utilize fiber grating to detect the STRESS VARIATION anchor pole.

Background technology

Anchor pole is as one of main support form of underground construction and rock slope, and the maintenance of civil engineering stability is played an important role, and especially in the joint fissure rock mass, anchor pole is fairly obvious to the reinforcement effect of rock mass.

Because engineering-environment condition difference, the anchor pole that uses in the construction need different length usually, and might differ greatly.At present, solution to this problem is to use " anchor pole splicing sleeve " in the field.The anchor pole splicing sleeve has internal thread, and the anchor bar body termination has external screw thread, and anchor bar body is screwed in the splicing sleeve from mutual opposed both sides, promptly adopts the mode of straight thread butt joint to realize any cutting and spreading to anchor bar body.The termination external screw thread of this class anchor bar body is unidirectional, necessary revoling tube and anchor bar body simultaneously when connecting, and when needs shorten anchor bar body, must save anchor bar body from the last and take off.In narrower and small construction space, use not very convenient.

Reinforce in the engineering of country rock in the anchor pole method, must measure surrouding rock stress, the method of using is electricity consumption foil gauge principle gaging pressure and pulling force mostly now, the major defect of this method is, when long term monitoring is used, sensor can not play long-term monitoring in real time and the accurate purpose of measuring because humidity etc. are former thereby inefficacy.If anchor pole is connected to certain-length, the inconvenience that the shortcoming of this measuring method also is embodied in owing to distributed measurement makes the aspects such as strain dyscalculia that distribute on the anchor pole.

The utility model content

The purpose of this utility model is exactly at the deficiencies in the prior art, and a kind of mountable anchor pole is provided, and can either satisfy in the engineering needs to long anchor pole, the operation at convenient construction scene again.This mountable anchor pole also disposes fiber-optic grating sensor, in order to measure the stress distribution of long anchor pole.Fiber-optic grating sensor is anticorrosive, moisture resistance is wet, safe in utilization.

For achieving the above object, the technical solution of the utility model is as follows:

A kind of mountable anchor pole, comprise outer anchor head, anchor head, anchor bar body and splicing sleeve, the anchor bar body two ends have external screw thread, splicing sleeve is an individual components, inside pipe wall has internal thread, it is characterized in that: the front end of described outer anchor head and the rear end of anchor head have external screw thread respectively, and two parts hand of spiral is opposite; The external screw thread direction at described anchor bar body two ends is opposite; Described splicing sleeve inwall two ends internal thread direction is opposite.

Above-mentioned mountable anchor pole use splicing sleeve with each parts of anchor pole by being threaded, threaded portion by each parts that will link to each other successively is designed to the different hands of spiral separately, make when connecting anchor pole, only need be rotationally connected sleeve pipe and need not rotate miscellaneous part and just each parts of anchor pole can be coupled together.Therefore the attended operation method is easy, and the operating space that needs is very little.Owing to rotate anchor pole the optical fiber cable on the anchor pole is tangled when also having prevented simultaneously in the prior art anchor pole spreading.

Above-mentioned mountable anchor pole can also be installed supporting grating sensor as anchor pole strain measurement parts, is specially: keep somewhere an optical-fibre channel on anchor bar body, packaged optical fiber is fixed on optical-fibre channel with the grating sensor that is used for surveying strain.

The above-mentioned mountable anchor pole that grating sensor has been installed utilizes the measurement of grating sensor realization to anchor stress, displacement.Particularly under anchor pole spreading situation, connect corresponding fiber connector and just can realize the distributed measurement of stress easily, thereby realized the ess-strain of anchor pole is monitored for a long time accurately.

Compared with prior art, the beneficial effects of the utility model are: by changing the hand of spiral of mountable termination point of anchor rod in the prior art, make the operation of spreading anchor pole simpler, the action required space is littler, more adapts to the needs of the operation in the small space in the site operation.Can make the monitoring that anchor stress is changed long-term, stable by the attachable fiber-optic grating sensor of configuration on anchor pole, measurement result is more accurate.

Description of drawings

Fig. 1 is the three-dimensional diagrammatic sketch of mountable anchor pole.

Fig. 2 is the splicing sleeve cut-away view.

Fig. 3 is mountable anchor bar body and splicing sleeve assembling diagrammatic sketch.

Fig. 4 is mountable anchor pole and splicing sleeve assembling A-A cut-away view.

Fig. 5 is the mountable anchor pole cross section cut-away view that has groove.

Fig. 6 is the three-dimensional diagrammatic sketch of mountable anchor bar body that has groove.

Fig. 7 is that mountable fiber grating is measured anchor pole and splicing sleeve assembling schematic diagram.

Fig. 8 is the adapter protective cover schematic perspective view among the embodiment four.

Fig. 9 is an adapter protective cover vertical view.

Figure 10 is an adapter protective cover lateral view.

Figure 11 is the adapter protective cover schematic perspective view among the embodiment five.

Figure 12 is the adapter protective cover schematic perspective view among the embodiment six.

Number in the figure is as follows:

1 outer anchor head 7 fiber adapter

2 anchor heads, 8 adapter protective covers

3 anchor bar bodies, 81 auricles

32 grooves, 82 installing holes

4 splicing sleeves, 83 incoming lines

5 optical fiber, 831 breach

51 tail optical fibers, 832 circular holes

52 fiber connectors, 833 short pipes

834 long nicks

The specific embodiment

Below in conjunction with accompanying drawing, the utility model preferred embodiment is further described.

Embodiment one

As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, process a mountable anchor pole.

Select for use the reinforcing bar of diameter 23mm to process.

Processing anchor bar body 3 is selected the reinforcing bar of long 360mm for use, and the reinforcing bar two ends are processed with one section external screw thread respectively from the 5mm place; Outer anchor head 1 front end of processing has one section external screw thread; There is one section external screw thread anchor head 2 rear ends of processing.All screw thread specifications are external diameter 22mm, pitch 1.5mm, and long 50mm, promptly outer anchor head 1,

anchor head

2 and 3 of anchor bar bodies are threaded isometric.

Process splicing sleeve 4 separate parts simultaneously.Select long 96mm for use, the steel tubing of external diameter 30mm is respectively processed one section external diameter 22mm at the steel pipe inwall from two ends, pitch 1.5mm, and the internal thread of long 43mm, splicing sleeve 4 two ends internal threads are isometric.

Outer anchor head 1 front end of processing is opposite with anchor head 2 a rear ends threaded direction; The external screw thread direction at anchor bar body 3 two ends of processing is opposite; The internal thread direction at the splicing sleeve 4 inwall two ends of processing is opposite.

Can connect anchor head 2, anchor bar body 3 and outer anchor head 1 each several part successively by splicing sleeve 4.

In the present embodiment, the length of anchor pole 3 can be processed as 1～8m according to the needs of site operation.

Embodiment two

As Fig. 4, Fig. 5, shown in Figure 6, processed finished products among the embodiment one further is processed into a mountable fiber grating measures anchor pole, no longer repeat with same section among the embodiment one, difference is: optical-fibre channel of processing is used to arrange optical fiber 5 and grating sensor on anchor bar body 3.Optical-fibre channel is an axial notch 32 of anchor bar body 3 outer Monday of side, and be specially: Monday, side was opened a wide 4mm outside anchor bar body 3, the axial notch 32 of dark 3.2mm, and groove 32 length equate with anchor bar body 3.Place a packaged optical fiber 5 in the groove 32 and be used to survey the grating sensor of strain, and fill and lead up groove 32 with epoxy resin.The tail optical fiber 51 of respective length is left according to actual conditions in optical fiber 5 two ends, also can be welding together smoothly so that anchor bar body 3 connects back optical fiber 5.

Embodiment three

As shown in Figure 7, process a mountable fiber grating and measure anchor pole, no longer repeat with something in common among the embodiment two, its difference is: the two ends tail optical fiber 51 of optical fiber 5 is processed into fiber connector 52 fiber connectors 52 respectively and connects by fiber adapter 7.The connection of fiber connector 52 can be FC, SC or ST mode.

Embodiment four

As Fig. 8, Fig. 9, shown in Figure 10; process a mountable fiber grating and measure anchor pole; no longer repeat with something in common among the embodiment three; its difference is: adapter protective cover 8 is arranged outside the fiber adapter 7; the fiber adapter 7 that will protect covers, and prevents that the various interference in the external world from shining into fiber adapter 7 unstable or damages.

Adapter protective cover 8 is cuboid uncovered box like structure, and the auricle 81 of a pair of band installing hole 82 is respectively arranged on two long side surfaces, on two short sides an incoming line 83 is arranged respectively.Incoming line 83 is opening U type breach towards uncovered limit, short side.

Adapter protective cover 8 cuboids are of a size of long 230mm, wide 130mm, high 85mm; Auricle 81 is of a size of 50mm * 50mm; Distance is 40mm between incoming line 83U shape breach both sides.

Adapter protective cover 8 installation processes are as follows: screwed short steel column (position is corresponding with the protective cover installing hole) in welding around the fiber adapter 7 that needs protection, protective cover 8 is covered, and get final product with nut screwing clamping.Tail optical fiber 51 is drawn from incoming line 83.Also can be connected on the protective cover 8 with protection tail optical fiber 51 if desired with hose thread.

Embodiment five

As shown in figure 11, process a mountable fiber grating and measure anchor pole, no longer repeat with something in common among the embodiment four, its difference is: incoming line 83 is circular holes 832 that have breach 831, and breach 831 is towards uncovered limit, short side.

Embodiment six

As shown in figure 12, process a mountable fiber grating and measure anchor pole, no longer repeat with something in common among the embodiment five, its difference is: incoming line 83 has the short pipe 833 of an axial and short lateral vertical at circular hole 832 external fixation, short pipe 833 inner chambers are communicated with the box inner chamber, long nick 834 with axial equality is arranged on short pipe 833 sidewalls, and long nick 834 communicates with breach 831.

Claims

1. mountable anchor pole, comprise outer anchor head (1), anchor head (2), anchor bar body (3) and splicing sleeve (4), anchor bar body (3) two ends have external screw thread, splicing sleeve (4) is an individual components, inside pipe wall has internal thread, it is characterized in that: the rear end of the front end of described outer anchor head (1) and anchor head (2) has external screw thread respectively, and two parts hand of spiral is opposite; The external screw thread direction at described anchor bar body (3) two ends is opposite; Described splicing sleeve (4) inwall two ends internal thread direction is opposite.

2. anchor pole according to claim 1, it is characterized in that: 1 optical-fibre channel is arranged on the described anchor bar body (3), be fixed with packaged optical fiber (5) in the passage and be used to survey the grating sensor of strain, the tail optical fiber (51) of certain-length is left at optical fiber (5) two ends, perhaps be processed into fiber connector (52) respectively, fiber connector (52) can pass through fiber adapter (7) and connect.

3. anchor pole according to claim 2 is characterized in that: described optical-fibre channel is an axial notch (32) of anchor bar body (3) outer Monday of side, and groove (32) length equates with anchor bar body (3).

4. according to claim 1,2,3 arbitrary described anchor poles, it is characterized in that: described anchor bar body (3) length is 1～8m.

5. according to claim 1,2,3 arbitrary described anchor poles, it is characterized in that: described outer anchor head (1), anchor head (2) and anchor bar body (3) institute are threaded isometric.

6. according to claim 1,2,3 arbitrary described anchor poles, it is characterized in that: described splicing sleeve (4) two ends internal thread is isometric.

7. according to claim 2 or 3 described anchor poles, it is characterized in that: described fiber connector (52) can be FC, SC or ST mode.

8. according to claim 2 or 3 described anchor poles, it is characterized in that: adapter protective cover (8) is arranged outside the described fiber adapter (7).

9. anchor pole according to claim 3 is characterized in that: described groove (32) is filled and led up with epoxy resin.

10. anchor pole according to claim 7; it is characterized in that: described adapter protective cover (8) is a cuboid uncovered box like structure; the auricle (81) that a pair of band installing hole (82) is respectively arranged on two long side surfaces respectively has an incoming line (83) on two short sides.