CN102182480A

CN102182480A - Mortar anchor constructing method

Info

Publication number: CN102182480A
Application number: CN2011101140744A
Authority: CN
Inventors: 辛振省; 郑保才
Original assignee: China Railway No 3 Engineering Group Co Ltd
Current assignee: China Railway No 3 Engineering Group Co Ltd
Priority date: 2011-05-04
Filing date: 2011-05-04
Publication date: 2011-09-14
Anticipated expiration: 2031-05-04
Also published as: CN102182480B

Abstract

The invention belongs to the technical field of mortar anchor construction in tunnel and underground engineering and side slope engineering, in particular to a mortar anchor constructing method. By the method, the problem that the mortar anchor constructing method has difficulty in ensuring engineering quality in the prior art is solved. The method accomplishes mortar anchor construction by using a frustum-shaped location plug consisting of an upper part and a lower part; the upper part of the location plug has a hard wedge structure; the lower part of the location plug is made of elastic material; and a through hole is formed in the lower part of the location plug along the mortar-injecting direction. The method disclosed by the invention is low in cost, simple and easy in operation and easy in popularization; the economic benefit and social benefit of the method are outstanding in the current large-scale tunnel and underground engineering and side slope engineering; and the popularization value of the method is very high.

Description

A kind of grouting rock bolt job practices

Technical field

The invention belongs to the technical field of tunnel and underground construction and slope project grouting rock bolt construction, be specifically related to a kind of grouting rock bolt job practices.

Background technology

Along with the day of land resources is becoming tight, the planning of increasing traffic route can not occupy cultivated land in a large number again, so traffic engineering often need be built in the mountain region, inevitably need in the engineering construction to adopt the mode of tunnel or side slope to carry out design and construction, in the engineering construction field, the proportion that tunnel and underground construction and slope project account for is increasing.In numerous tunnels and side slope construction project, all need to adopt grouting rock bolt to realize the stable of country rock, so grouting rock bolt support at present is the support system of widespread usage in tunnel or the slope project as support system.

The grouting rock bolt system main construction method of using is at present: arrange the position, hole of anchor pole earlier, and according to position of designing and angle boring, the grouting pump pipeline is connected again that the wetting pipeline of water and thin pulp is inserted to Grouting Pipe at the bottom of the square more then.Slowly open valve and begin slip casting.Under pressure promoted, water was preceding, mortar after, the moistening pump housing of water and pipeline, the guiding mortar enters in the anchor hole, along with mortar constantly is pressed into the eyeground, Grouting Pipe and then slowly withdraws from eyelet, after mortar is filled with eyelet.Immediately anchor pole is inserted eyelet, then, anchor pole is inserted to the eyeground with the method that pushes away, thumps.Stop up the aperture with timber wedge then, prevent that mortar runs off.

But in the site operation process, anchor pole needs hammering in the location, and the hammering vibrations cause the mortar segregation and the mortar outflow of anchor pole easily, and locate failure under a lot of situation, the secondary location makes the mortar of initial set and the bond stress of anchor pole lose efficacy, and makes the support system of whole grouting rock bolt lose efficacy; Moreover hammering is bigger to original unsettled country rock disturbance, causes that easily country rock caves in; In addition it is lack of standardization to stop up the employed timber wedge size in aperture, can not play due effect.The lighter need do over again, and weight person causes engineering accident.

Summary of the invention

There are the problems referred to above in the present invention in order to solve existing grouting rock bolt job practices, be difficult to guarantee workmanship, a kind of grouting rock bolt job practices is provided, with easy method anchor pole is accurately located during insertion, the seal anchors aperture prevents the slurries outflow simultaneously, reaches the purpose of construction safely and fast when guaranteeing workmanship.

The present invention adopts following technical scheme to realize:

The grouting rock bolt job practices, step is as follows:

1), arrange the position, hole of anchor pole, and form anchor hole according to the position and the angle boring of design;

2), slip casting in anchor hole;

3), prepare limit plug, limit plug is made of the upper and lower two parts that can form the frustum shape, limit plug top is divided into the wedge structure of hard, the limit plug lower part is made by elastomeric material, the limit plug lower part is along having through hole on the slip casting direction;

4), slip casting is about to extract Grouting Pipe when full out, Grouting Pipe filled in the through hole of limit plug lower part, then the anchor hole mouth is filled in the limit plug lower part, and compresses;

5), continue slip casting, treat that slurries flow out from the wedge shape space of top, limit plug lower part, Grouting Pipe is extracted on the limit plug top of wedge structure beyond the Great Wall, inserts anchor pole simultaneously;

6), treat that slurries solidify the construction of then finishing grouting rock bolt.

The present invention has following beneficial effect: it is set to two parts up and down to the positioner that seals that the present invention adopts dexterously, and top is divided into hard, the bottom is divided into elastic body, so in the work progress that it is finished, when being about to the nature outflow, mortar fills in the fullness degree that the bottom elastic part has in time guaranteed slurries, guaranteed the construction quality of grouting rock bolt, the top wedge structure further guarantees mortar construction enforcement as interim exhaust plant simultaneously; Simultaneously a whole set of closure system can be so that anchor bolt construction be just can be in design attitude through the external force vibrations, and is in the slurries centre position, the common fault of avoiding disturbance that the hammering in the conventional method brings to country rock and stopper to be difficult to the jam-pack aperture; So the present invention guarantees construction quality to greatest extent from construction technology or from the construction angle of mechanics.This method is cheap, and is simple to operation, very easily promotes, and its economic benefit and social benefit are particularly outstanding, of far-reaching significance in current extensive tunnel and underground construction and slope project, and high promotional value is arranged.

Description of drawings

Fig. 1 is the schematic diagram that becomes anchor hole according to the bolthole position

Fig. 2 is the schematic diagram of slip casting in anchor hole

Fig. 3 is the structural representation of limit plug

Fig. 4 fills in the schematic diagram that continues slip casting behind the limit plug

Fig. 5 is sealing anchor hole aperture and the schematic diagram that inserts anchor pole

Among the figure: 1-country rock, 2-anchor hole, 3-Grouting Pipe, 4-slurries, 5-limit plug top, 6-limit plug lower part, 7-through hole, 8-anchor pole.

The specific embodiment

The specific embodiment to invention is described further in conjunction with the accompanying drawings.

The grouting rock bolt job practices, step is as follows:

1, arranges the position, hole of anchor pole 8 earlier, and hole, as shown in Figure 1 according to the position and the angle of design.

2, the grouting pump pipeline is connected, the wetting pipeline of water and thin pulp then is inserted to Grouting Pipe 3 the anchor hole bottom more again, slowly open valve and begin slip casting, on one side slip casting slowly extract Grouting Pipe 3 out according to the slurries amount on one side, full until slurries.

3, prepare limit plug, limit plug is made of the upper and lower two parts that can form the frustum shape, and limit plug top 5 is the wedge structure of hard, and limit plug lower part 6 is made by elastomeric material, limit plug lower part 6 is along having through hole 7, as shown in Figure 3 on the slip casting direction.Whole limit plug rear portion diameter is more bigger than anchor hole mouth.

4, slip casting is about to extract out when full Grouting Pipe 3, Grouting Pipe 3 is filled in the through hole 7 of limit plug lower part 6, the anchor hole mouth is filled in limit plug lower part 6 and compress, limit plug top 5 is not filled in earlier, continue slip casting then, the gas that slip casting is got rid of is discharged from the wedge shape space of 5 tops, limit plug lower part, as shown in Figure 4.

5, treat that slurries 4 flow out from the top wedge shape space, illustrate that slurries are full, beyond the Great Wall the limit plug top 5 of hard wedge structure, insert ready anchor pole 8 when extracting Grouting Pipe 4, then anchor pole is positioned and fills in the location, as shown in Figure 5, treats that slurries solidify the construction of then finishing grouting rock bolt.

Claims

1. grouting rock bolt job practices is characterized in that step is as follows:

1), arrange the position, hole of anchor pole (8), and form anchor hole (2) according to the position and the angle boring of design;

2), slip casting in anchor hole (2);

3), prepare limit plug, limit plug is made of the upper and lower two parts that can form the frustum shape, limit plug top (5) is the wedge structure of hard, and limit plug lower part (6) are made by elastomeric material, and limit plug lower part (6) are along having through hole (7) on the slip casting direction;

4), slip casting is about to extract Grouting Pipe (3) when full out, Grouting Pipe (3) filled in the through hole (7) of limit plug lower part (6), then limit plug lower part (6) are filled in the anchor hole mouth, and compress;

5), continue slip casting, treat that slurries (4) flow out from the wedge shape space of limit plug lower part (6) top, Grouting Pipe (3) is extracted on the limit plug top (5) of wedge structure beyond the Great Wall, inserts anchor pole (8) simultaneously;

6), treat that slurries (4) solidify the construction of then finishing grouting rock bolt.