CN206600179U - A kind of end expansion type locks pin anchor tube - Google Patents

Abstract

The utility model provides a kind of end expansion type and locks pin anchor tube, including body and cause expansion core material, the one end of the body circumferentially-spaced offers some pipe seams along its, the cause expansion core material is hollow tube structure, it is described to cause expansion core material to be divided into the permanent section that external diameter is less than internal diameter of tube body along its axial direction, variable cross-section section and external diameter that external diameter gradually increases, which are more than on the heavy wall pipeline section of internal diameter of tube body, the permanent section, is provided with position-limit mechanism.The end expansion type lock pin anchor tube utilizes the principle of expansion bolt, by being cracked to conventional lock pin anchor tube end and coordinating cause expansion core material so that lock pin anchor tube bottom effectively expands, effectively improve the bearing capacity of lock pin anchor tube and effectively suppress the sedimentation deformation of tunnel arch wall pin, deformation allowance is excavated so as to effectively mitigate influence and reduction of the constructing tunnel to surrounding enviroment, is had a extensive future.

Description

A kind of end expansion type locks pin anchor tube

Technical field

The utility model belongs to weak surrounding rock tunnel technical field of construction equipment, and in particular to a kind of end expansion type locks pin anchor Pipe.

Background technology

During tunnel line route selection, limited by objective condition, tunnel inevitably passes through some weaknesses and enclosed Rock location（Such as texture stratum, crushed zone, serious weathered zone）, constructing tunnel is carried out in these weak surrounding rock locations, often The problem of tunnel deformation is excessive can be produced.Monitoring During The Access and Three-dimensional simulation result show, because the major part in tunnel becomes Shape amount be as caused by the sedimentation of tunnel arch wall pin, thus to suppress tunnel produce excessive deformation, just must effectively control tunnel The sedimentation deformation of arch wall pin.

Reply technical measures when occurring deforming excessive in usual Modelling of Tunnel Excavation in Soft Rock are exactly in steelframe underlay channel-section steel And lock pin anchor tube is set, and belong to interim measure in steelframe underlay channel-section steel, it will be failed when excavating bottom Rock And Soil, and set Lock pin anchor tube then belongs to essential measure.However, traditional lock pin anchor tube is steel-tube construction, its end construction is fixed, and is setting lock During pin anchor tube, locking can not be in close contact between the end of pin anchor tube and drilling, the anchoring effect of reduction lock pin anchor tube, accordingly, it would be desirable to The structure of traditional lock pin anchor tube is improved to improve its anchoring effect and bearing capacity.

Utility model content

The purpose of this utility model is to overcome anchoring effect and bearing capacity in existing lock pin anchor tube practice of construction limited, no The problem of tunnel arch wall pin is settled can effectively be suppressed.

Therefore, the utility model, which provides a kind of end expansion type, locks pin anchor tube, including body and cause expansion core material, the pipe The one end of body along its it is circumferentially-spaced offer some pipe seams, the cause expansion core material is hollow tube structure, and the cause is swollen Core is divided into the permanent section that external diameter is less than internal diameter of tube body along its axial direction, and the variable cross-section section and external diameter that external diameter gradually increases are big In being provided with position-limit mechanism on the heavy wall pipeline section of internal diameter of tube body, the permanent section.

Further, some pipe seams are around circumferential equidistantly distributed.

Further, the pipe seam has three, and the central angle between pipe seam is 120 ° two-by-two.

Further, the pipe seam is shaped as Trapezoidal structure, and the minimum widith of the pipe seam is less than position-limit mechanism Minimum diameter, the Breadth Maximum of pipe seam is more than or equal to the maximum gauge of position-limit mechanism.

Further, the pipe seam is the wide structure in middle narrow, two ends, and pipe seam is in flaring along the middle direction to two ends Shape.

Further, the position-limit mechanism include being arranged on limited screw hole on the outer wall of permanent section and with it is spacing The supporting limited screw of screw hole, the position in the limited screw hole is corresponding with pipe seam position, and the limited screw is through pipe Stitch and be fixed in limited screw hole.

Compared with prior art, the beneficial effects of the utility model：

(1) this end expansion type lock pin anchor tube that the utility model is provided utilizes the principle of expansion bolt, by normal Rule lock pin anchor tube end is cracked and coordinates cause expansion core material and effectively expanded so that locking pin anchor tube bottom, effectively improves holding for lock pin anchor tube Loading capability and the sedimentation deformation for effectively suppressing tunnel arch wall pin, so as to effectively mitigate influence of the constructing tunnel to surrounding enviroment and subtract Small excavation deformation allowance, has a extensive future.

(2) this end expansion type lock pin anchor tube that the utility model is provided can be tied using traditional lock pin anchor tube Structure is improved, and is economized on resources, and saves cost.

The utility model is described in further details below with reference to accompanying drawing.

Brief description of the drawings

Fig. 1 is the structural representation that the utility model end expansion type locks pin anchor tube；

Fig. 2 is the structural representation that the utility model end expansion type locks pin anchor tube middle tube body；

Fig. 3 is the sectional view along A-A directions in Fig. 2；

Fig. 4 is the structural representation of cause expansion core material in the expansion type lock pin anchor tube of the utility model end；

Fig. 5 is that Fig. 4 is sectional view along B-B directions.

Description of reference numerals：1st, body；2nd, pipe seam；3rd, limited screw；4th, permanent section；5th, variable cross-section section；6th, thick-walled pipe Section；7th, limited screw hole.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The all other embodiment obtained, belongs to the scope of the utility model protection.

As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5, a kind of end expansion type lock pin anchor tube is present embodiments provided, including Body 1 and cause expansion core material, the one end of the body 1 along its it is circumferentially-spaced offer some pipe seams 2, the cause expansion core material is Hollow tube structure, the hollow region for causing expansion core material is grouting serous fluid passage, and the cause expansion core material is divided into along its axial direction External diameter is less than the permanent section 4 of the internal diameter of body 1, and variable cross-section section 5 and external diameter that external diameter gradually increases are more than the heavy wall of the internal diameter of body 1 Pipeline section 6, the permanent section 4 is socketed in body 1, causes expansion core material to be coaxially disposed with body 1, is set on the permanent section 4 Limited location mechanism.

Wherein, the position-limit mechanism include being arranged on limited screw hole 7 on the outer wall of permanent section 4 and with spacing spiral shell The supporting limited screw 3 in silk hole 7, the position in the limited screw hole 3 is corresponding with the position of pipe seam 2, and the limited screw 3 runs through Pipe seam 2 and it is fixed in limited screw hole 7.

When assembling body 1 and causing expansion core material, the permanent section 4 for causing expansion core material is first offered into pipe seam 2 from body 1 One end is inserted into body 1, causes the variable cross-section section 5 and heavy wall pipeline section 6 of expansion core material to be located at outside body 1, while by permanent section 4 Limited screw hole 7 it is corresponding with the position of pipe seam 2 on body 1, and limited screw hole 7 exposes at pipe seam 2, finally will be spacing Screw 3 is through pipe seam 2 and is fixed in limited screw hole 7, so as to expansion core material will be caused spacing on body 1.

In construction, drilled first by the projected depth of lock pin anchor tube, bit diameter is bigger than lock pin anchor tube 1 diameter of body Cleaning hole bottom scum silica frost after the completion of 8mm or so, drilling；Then the above-mentioned end expansion type assembled is locked to the inflatable end of pin anchor tube Insert in drilling, and the exposed one end end of lock pin anchor tube body 1 is impacted with pneumatic pick, now, cause the change of expansion core material to cut in drilling Gradually wedging is offered in the body 1 of pipe seam 2 face section 5, realizes the preliminary expansion of the end of body 1；Body 1 is connected into Grouting Pipe again Slip casting is carried out, the inside of body 1 and the space between body 1 and borehole wall is each filled with grouting serous fluid；It is finally that body 1 is exposed Firmly it is connected with protection steelframe in the part outside drilling；As subsequent tunnel is constructed, protection steelframe further will bear it Pressure from surrounding rock passes to the lock pin anchor tube, now, and the cause expansion core material in drilling will be wedged further in body 1, so that lock pin The bearing capacity of anchor tube is further improved, and reaches the purpose for effectively suppressing the sedimentation of tunnel arch wall pin.

The embodiment of refinement, as shown in Figures 2 and 3, in order that it is each when bearing protection steelframe pressure to obtain the end of body 1 Point uniform force, some pipe seams 2 are around circumferential equidistantly distributed, so that causing expansion core material uniformly to wedge in body 1. Pipe seam 2 described in the present embodiment has three, and the central angle between pipe seam 2 is 120 ° two-by-two.

And due to install lock pin anchor tube boring direction be obliquely, thus install lock pin anchor tube when in order to prevent cause Expansion core material is deviate from out of body 1, the shape of the pipe seam 2 is designed as into Trapezoidal structure, the minimum widith of the pipe seam 2 is less than The minimum diameter of position-limit mechanism, the Breadth Maximum of pipe seam 2 is more than or equal to the maximum gauge of position-limit mechanism.Specifically, in assembling The position of limited screw hole 7 is crossed at the minimum widith of pipe seam 2 when body 1 and cause expansion core material, limited screw 3 and pipe seam 2 is utilized Minimum widith, it is to avoid cause expansion core material to deviate from out of body 1 when lock pin anchor tube is installed.It is preferred that, the pipe seam 2 for it is middle it is narrow, The wide structure in two ends, and direction of the pipe seam 2 along centre to two ends is in flaring shape, it is ensured that limited screw 3 can be in pipe seam 2 vertically Can smoothly it move, causing the variable cross-section section 5 of expansion core material can gradually wedge in body 1.

In summary, this end expansion type lock pin anchor tube that the utility model is provided utilizes the principle of expansion bolt, leads to Cross that conventional lock pin anchor tube end is cracked and coordinates cause expansion core material and effectively expanded so that locking pin anchor tube bottom, effectively improve lock pin anchor The bearing capacity of pipe and the sedimentation deformation for effectively suppressing tunnel arch wall pin, so as to effectively mitigate shadow of the constructing tunnel to surrounding enviroment Ring and reduce and excavate deformation allowance, have a extensive future.

Exemplified as above is only for example, not constituting to protection domain of the present utility model to of the present utility model Limitation, it is every to be belonged to the same or analogous design of the utility model within protection domain of the present utility model.

Claims (6)

1. a kind of end expansion type locks pin anchor tube, it is characterised in that：Including body (1) and cause expansion core material, the one of the body (1) End along its it is circumferentially-spaced offer some pipe seams (2), the cause expansion core material is hollow tube structure, the cause expansion core material Be divided into the permanent section (4) that external diameter is less than body (1) internal diameter along its axial direction, variable cross-section that external diameter gradually increases section (5) and External diameter is more than the heavy wall pipeline section (6) of body (1) internal diameter, and the permanent section (4) is socketed in body (1), the permanent section (4) position-limit mechanism is provided with.

2. end expansion type as claimed in claim 1 locks pin anchor tube, it is characterised in that：Some pipe seams (2) are around circumference Equidistantly distributed.

3. end expansion type as claimed in claim 2 locks pin anchor tube, it is characterised in that：The pipe seam (2) has three, manages two-by-two It is 120 ° to stitch the central angle between (2).

4. end expansion type as claimed in claim 1 locks pin anchor tube, it is characterised in that：Being shaped as of the pipe seam (2) broadens Structure is spent, the minimum widith of the pipe seam (2) is less than the minimum diameter of position-limit mechanism, and the Breadth Maximum of pipe seam (2) is more than or waited In the maximum gauge of position-limit mechanism.

5. end expansion type as claimed in claim 4 locks pin anchor tube, it is characterised in that：The pipe seam (2) is middle narrow, two ends Wide structure, and direction of the pipe seam (2) along centre to two ends is in flaring shape.

6. end expansion type as claimed in claim 1 locks pin anchor tube, it is characterised in that：The position-limit mechanism includes being arranged on perseverance Limited screw hole (7) and the limited screw (3) supporting with limited screw hole (7) on the outer wall of section (4), it is described spacing The position of screw hole (7) is corresponding with pipe seam (2) position, and the limited screw (3) is through pipe seam (2) and is fixed on limited screw In hole (7).