CN206034436U - Half camber centering supporting structure of deep hole mortar stock - Google Patents

Abstract

The utility model discloses a half camber centering supporting structure of deep hole mortar stock, it includes centering support (5) that set up on the outer wall of stock (3), these centering support (5) are the half camber supports of making with the reinforcing bar, these centering support (5) comprise two horizontal pole (7) at both ends and circular arc section (8) of middle part transition, one of them horizontal pole (7) welded connection is on the outer wall of stock (3), circular arc section (8) and one piece other horizontal pole (7) of middle part transition are outwards opened and are formed the outer supporting structure. The utility model discloses a welding arc support that supports the stock reaches the stock and hugs closely petrosal foramen limit wall at downthehole purpose placed in the middle, the effectual long anchor rod bending deformation under the dead weight effect that has prevented on the stock, through setting up the centering support, can make the stock in the same direction as straight in the petrosal foramen, and the mortar can even parcel stock, has improved the stress condition of stock, has improved anchoring effect.

Description

A kind of half camber centering supporting structure of deep hole grouting rock bolt

Technical field

This utility model is related to Hydraulic and Hydro-Power Engineering technical field, more particularly, to a kind of half camber pair of deep hole grouting rock bolt Medium-height trestle structure.

Background technology

In the engineering slope stabilization and reinforcement of water conservancy and hydropower station, grouting rock bolt is a kind of more universal support pattern, general to unite Grouting rock bolt installs anchor pole (3) in hole (2) as shown in figure 1, its technical scheme is mainly drills (2) in side slope (1), Mortar is filled between hole (2) and anchor pole (3) in cavity, mortar is the power transmission medium between anchor pole and side slope.The stress of anchor pole is Mortar is delivered load to by side slope, mortar passes to anchor pole, after rockbolt stress, resistance is passed to into mortar again, mortar is again Side slope is passed to, the purpose of bolt anchorage side slope is reached by this circulation, so, the stressed effect of anchor pole and mortar chymoplasm Can amount, be to ensure the key that play one's part to the full of anchor pole.When rock-bolt length is longer, under the Gravitative Loads of anchor pole, anchor pole Curved state (as shown in Figure 1), the anchor pole back segment body of rod can be contacted with hole wall, and now, mortar is difficult to fully wrap up anchor pole, anchor Bar stress is poor, reduces significantly the supporting effect of anchor pole, it is also possible to cause slope instability.

Utility model content

The purpose of this utility model be in order to solve rock-bolt length it is longer when as Gravitative Loads cause anchor pole in bolthole In curved state cause the anchor pole back segment body of rod to contact with hole wall, the problem for making mortar be difficult to fully wrap up anchor pole, there is provided Plant half camber centering supporting structure of deep hole grouting rock bolt.

This utility model is achieved by following technical solution：

A kind of half camber centering supporting structure of deep hole grouting rock bolt, the structure is for anchor pole centering is fixed in side slope In bolthole, it be included in arrange on the outer wall of anchor pole to medium-height trestle, this pair of medium-height trestle is with half camber made by reinforcing bar Frame, this pair of medium-height trestle are made up of two cross bars at two ends and the arc section of middle part transition, and wherein one cross bar is welded to connect in anchor On the outer wall of bar, the arc section of middle part transition is flared outwardly to create outer support structure with an other cross bar.

On anchor pole every 2～4m one group of spacing interval setting to medium-height trestle.

On anchor pole per three to medium-height trestle constitute one group, with three between group between medium-height trestle with anchor pole as collar To being uniformly arranged, in same group, any two is 120 ° to the spacing angle of medium-height trestle.

The beneficial effects of the utility model：This utility model is by welding a kind of arc of support anchors on anchor pole Frame, reaches anchor pole purpose placed in the middle in hole, is effectively prevented the flexural deformation under Gravitative Loads of long anchor pole and is close to petrosal foramen side Wall, by arranging to medium-height trestle, can make anchor pole straight in petrosal foramen, and mortar can uniformly wrap up anchor pole, improve anchor pole Stress condition, improves anchoring effect.This utility model structural shape is simple, easy construction, and strong applicability, with preferable Jing Ji advantage.

Description of the drawings

Fig. 1 is the existing deep hole grouting rock bolt schematic diagram without centering structure；

Fig. 2 is the deep hole grouting rock bolt schematic diagram arranged to medium-height trestle of the present utility model；

Fig. 3 is the part A drawing in Fig. 2；

Fig. 4 is the a-a sectional views in Fig. 3；

Fig. 5 is of the present utility model to medium-height trestle drawing.

Description of reference numerals：1- side slopes, 2- boltholes, 3- anchor poles, 4- mortars, to medium-height trestle, 6- weld parts, 7- are horizontal for 5- Bar, 8- arc sections.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and examples.

Referring initially to Fig. 1, Fig. 1 illustrates the existing deep hole grouting rock bolt schematic diagram without centering structure；It can be seen that As anchor pole 3 is not provided with centering structure, after the bolthole 2 in the insertion side slope 1 of anchor pole 3, due to effect of weight, after anchor pole 3 Half section can nature to tenesmus, cause the bending of anchor pole 2, make mortar 4 be difficult to completely envelope anchor pole 2, so as to dotted line in FIG The B areas of frame scope form the poor area of rockbolt stress.

In view of the foregoing, this utility model has carried out such improvement, as shown in Fig. 2 in bolthole 2, along anchor The trend of bar 3, just arranges one group to medium-height trestle 5 at interval of a segment distance, by the outer support structure to medium-height trestle 5, makes anchor pole 3 exist It is fixed in bolthole 2, then passes through mortar 4 again to anchor pole 3 and medium-height trestle 5 is coated, reliably receive so as to be formed Power structure.

As shown in figure 3, it is of the present utility model it is this medium-height trestle 5 is welded on anchor pole 3 by weld part 6, and formed Outer support structure.As shown in figure 4, this pair of medium-height trestle 5 constitutes one group per three, three equal in ring by axle of anchor pole 3 to medium-height trestle 5 Cloth, interval angles are 120 ° two-by-two.The maximum outside diameter of its outer support structure is slightly less than the internal diameter of bolthole 2, then will by mortar 4 This pair of medium-height trestle 5 and anchor pole 3 fill closely knit together.

As shown in figure 5, this pair of medium-height trestle 5 is with half camber support made by reinforcing bar, this pair of medium-height trestle 5 two by two ends The arc section 8 at cross bar 7 and middle part is constituted, and wherein one cross bar 7 is weldingly fixed on anchor pole 3 by weld part 6, another cross bar 7 together with arc section 8 are flared out propping up.Two 7 positions of cross bar are parallel, but not on one wire, between two cross bars 7 Vertical dimension is little, it is ensured that the cross bar 7 for opening will not be hindered by hole wall in bolthole 2.

This utility model is implemented：

As shown in Fig. 2 first, the drilling in side slope 1 forms bolthole 2, is made to medium-height trestle using bar bending welding 5, medium-height trestle 5 will be welded on anchor pole 3 by weld part 6 and be squeezed in bolthole 2, then perfusion mortar 4 is closed.

Petrosal foramen is inserted smoothly for the ease of anchor pole 3, to the construction of medium-height trestle 5 it should be noted that problems with：1. to medium-height trestle 5 and anchor The body of rod radius that bar 3 is formed after welding need to be less than 2 radius of bolthole.2. it is for reducing to the frictional force between medium-height trestle 5 and crag, right Medium-height trestle 5 should be in support structure outside circular arc, to unsuitable long, the 5cm～10cm length of 7 length of cross bar on medium-height trestle 5, centering Two 7 arc-shaped transitions of cross bar are formed and are supported by the arc section 8 of support 5.When 3. welding, should be with anchor pole to 5 circular arc direction of medium-height trestle 3 direction of insertion are consistent, can so prevent from being blocked medium-height trestle 5 by crag.4. be readily bent I grade of reinforcing bar is preferably used to medium-height trestle 5 Make, bar diameter 8mm or so is advisable, its stiffness energy support anchors weight.

The patterns such as dowel beam of the anchor pole of the present utility model 3 comprising 3 or many compositions of anchor pole 3 of single anchor rod.

Certainly, it is more than concrete application example of the present utility model, this utility model also has other embodiments, all The technical scheme formed using equivalent or equivalent transformation, is all fallen within the protection domain required by this utility model.

Claims (3)

1. half camber centering supporting structure of a kind of deep hole grouting rock bolt, the structure is for being fixed on side slope (1) by anchor pole (3) centering On bolthole (2) in, it is characterised in that：It is included in arrange on the outer wall of anchor pole (3) to medium-height trestle (5), the centering Frame (5) is with half camber support made by reinforcing bar, two piece cross bars (7) and the circle of middle part transition of this pair of medium-height trestle (5) by two ends Segmental arc (8) is constituted, and wherein one cross bar (7) is welded to connect on the outer wall of anchor pole (3), the arc section (8) of middle part transition with it is another An outer cross bar (7) is flared outwardly to create outer support structure.

2. half camber centering supporting structure of deep hole grouting rock bolt according to claim 1, it is characterised in that：In anchor pole (3) On every 2～4m one group of spacing interval setting to medium-height trestle (5).

3. half camber centering supporting structure of deep hole grouting rock bolt according to claim 2, it is characterised in that：In anchor pole (3) On one group is constituted to medium-height trestle (5) per three, with three between group to being collar to equal with anchor pole (3) between medium-height trestle (5) Cloth is arranged, and in same group, any two is 120 ° to the spacing angle of medium-height trestle (5).