CN113756336B - Device and method for reinforcing rock slope containing weak interlayer - Google Patents

Abstract

The invention discloses a device and a method for reinforcing a rock slope containing a soft interlayer, and relates to the technical field of slope reinforcement. According to the invention, the concrete column after the anchor cable is grouted and formed is reinforced, and the local strength performance is enhanced, so that the effect of well internally reinforcing the rock slope containing the weak interlayer in the mining area is achieved, the situation that the vertical plane at the intersection of the concrete column and the rock slope is sheared and damaged due to uneven stress is further avoided, the shearing force direction of the sliding surface is changed, which is beneficial to the slope, meanwhile, the device has the advantages of simple manufacture, convenience for determining the actual length of the device according to the depth of the weak interlayer, and in addition, after short-term reinforcement is carried out, the device can be recycled, and the use efficiency is improved.

Description

Device and method for reinforcing rock slope containing weak interlayer

Technical Field

The invention relates to the technical field of slope reinforcement, in particular to a device and a method for reinforcing a rock slope with a weak interlayer.

Background

The rock slope has various reinforcing measures due to complex lithology, structure and hydrogeology conditions and different damage modes, but the rock slope with the weak interlayer is difficult to be effective for a long time by adopting a conventional reinforcing method.

The reason is that the rock slope damage is characterized in that: the weak interlayer is slowly extruded towards the direction of facing the sky under the pressure effect of the hard rock mass in upper portion, and along with the weak interlayer is extruded towards the slope face of facing the sky and drops, the support on upper portion is weakened and the production is pulled and cracked and destroyed, leads to the weak interlayer rock mass to take place to extrude and peel off, and the hard rock mass in upper portion takes place to pull and crack and destroy, and for mining area side slope, under the vibration that takes place to explode, the aggravation weak interlayer is extruded towards the direction of facing the sky and is dropped, very easily takes place danger, produces danger to mining area safety work.

For the slope engineering, under the action of the gravity of the upper rock mass, a single anchor cable is adopted for reinforcement treatment, the rock structure is greatly changed at the intersection of the weak interlayer and the rock slope, and the vertical plane of the single anchor cable structure at the intersection is subjected to sudden change and uneven stress compared with the whole anchor cable, so that shearing damage is easily caused.

Therefore, it is necessary to invent a rock slope reinforcement device with a weak interlayer to solve the above problems.

Disclosure of Invention

The invention aims to provide a rock slope reinforcing device with a weak interlayer to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a side slope reinforcing apparatus who contains weak intermediate layer rock matter which characterized in that: the slope reinforcing device consists of a shell mechanism and a drawing reinforcing mechanism,

the shell mechanism comprises a sleeve, a lower fixing ring, a lower supporting rod, a cross-shaped blocking rod, an upper fixing ring and an upper supporting rod; the lower fixing ring is positioned at the lowest end of the inner side of the shell mechanism, the number of the lower supporting rods is four, the lower supporting rods are uniformly and fixedly arranged on the outer side of the lower blocking ring and are all fixedly connected with the inner wall of the sleeve, the cross-shaped blocking rod is fixedly arranged at the upper part of the lower fixing ring, the upper fixing ring is positioned at the uppermost end of the inner side of the shell mechanism, the number of the upper supporting rods is four, the upper supporting rods are uniformly and fixedly arranged on the outer side of the upper fixing ring and are all fixedly connected with the inner wall of the sleeve; four guide mechanisms are uniformly distributed on the inner wall of the top of the sleeve;

the pull reinforcing mechanism comprises a central pull rod ring, a central pull rod, a connecting sleeve ring and a reinforcement body, wherein the connecting sleeve ring is fixed at the center of the cross-shaped stop rod, the central pull rod ring is fixed on the upper portion of the central pull rod, the central pull rod penetrates through a central hole of the upper stop ring and extends into the sleeve, the lower portion of the central pull rod is fixedly connected with the connecting sleeve ring, universal joints are evenly distributed on the outer wall of the connecting sleeve ring, the reinforcement body is four, the lower end of the reinforcement body is movably connected with the universal joints, the upper portion of the reinforcement body is respectively abutted to four guide mechanisms, and the top of the reinforcement body is respectively provided with a tip portion.

Preferably, guiding mechanism includes mounting bracket and direction concave wheel, mounting bracket and sleeve inner wall fixed connection, the direction concave wheel rotates through the round pin axle and sets up in the mounting bracket inboardly, and four add muscle body upper portions laminate with four direction concave wheels respectively.

Preferably, a plurality of circular holes which are communicated up and down are formed on the periphery of the sleeve at equal intervals along the length direction.

The invention discloses a method for reinforcing a rock slope with a weak interlayer, which is characterized in that a rock slope reinforcing device with a weak interlayer is adopted to reinforce the rock slope with the weak interlayer, and the method comprises the following specific steps:

step 1, firstly, measuring the position of the joint of the weak interlayer and the rock slope as a potential sliding surface 5,

step 2, selecting two identical side slope reinforcing devices A and B, connecting the two side slope reinforcing devices in series by respectively penetrating through upper and lower through round holes of two sleeves of the two side slope reinforcing devices A and B by using a plurality of steel strands, connecting central pull rod rings of the two side slope reinforcing devices A and B in series by using anchor cables to form a side slope reinforcing component, and binding the steel strands penetrating out of the bottom ends of sleeve holes by using iron wires to prevent the steel strands from falling off;

step 3, anchor cable installation

Step 3.1, calibrating the drilling position of the side slope anchor cable, and marking the installation position of the anchor cable according to design requirements according to the drilling central line determined by measurement;

step 3.2, drilling an anchor cable hole by using a drilling machine, and connecting a center pull rod ring of the slope reinforcement device A after being connected in series with a center pull rod ring of the slope reinforcement device B through a pre-stressed anchor cable;

3.3, taking the slope reinforcement device A as an anchor cable head, penetrating into an anchor cable hole for anchoring, so that the reinforcement device A is anchored into a hard rock body after the slope reinforcement component is unfolded, and a sleeve of the slope reinforcement device B is arranged on a latent sliding surface;

step 4, grouting

Step 4.1, before grouting, pulling a central pull rod ring of a sleeve of a side slope reinforcing device B, and stretching an anchor cable for the first time, so that the anchor cable at the upper part of the sleeve of the side slope reinforcing device B drives the central pull rod to ascend, and simultaneously drives the anchor cable at the upper part of the sleeve of the side slope reinforcing device A to drive the central pull rod of the device A to ascend, so that two central pull rods drive respective connecting lantern rings to ascend at the inner sides of two sleeves, four reinforcement bodies stretch by taking the central pull rod as a center under the limitation of an upper fixing ring, in the stretching process of the reinforcement bodies, a guide concave wheel limits and supports the reinforcement bodies, and simultaneously the guide concave wheel rotates to drive the reinforcement bodies to move, so that the top part of the side slope reinforcing device A is fixed with the deep geological part, and meanwhile, the top part of the side slope reinforcing device B is fixed by penetrating the interlayer;

and 4.2, grouting an inner anchor section into the anchor cable hole, anchoring the slope reinforcement device A at a reserved position, performing secondary tensioning when the mortar of the anchor section and the anchor pier concrete meet the design strength requirement, and finally performing free end grouting to finish the anchor cable construction.

The invention has the technical effects and advantages that:

the invention is provided with the shell mechanism and the drawing reinforcing mechanism, so that when the side slope is excavated to meet the design requirement, the anchor cable and the device are placed into the anchor cable hole for anchoring, the end part of the anchor cable is connected with the device for convenient anchoring to a hard rock body, then the anchor cable is stretched once before concrete is poured, so that the anchor cable drives the rod piece to ascend, and further the rod piece drives the connecting lantern ring to ascend at the inner side of the sleeve, because of the limitation of the upper fixing ring, the four reinforcing bodies stretch out by taking the rod piece as the center, and penetrate into the deep geological depth through the sharp part, then the concrete is poured, at the moment, the anchor cable is stretched again, and then the anchor cable is anchored at the fixed position, compared with the same type device in the prior art, the invention achieves the effect of good internal reinforcement of the rock side slope containing a soft interlayer in a mining area by reinforcing the concrete column formed by grouting the anchor cable, and reinforcing the local strength performance, the device has the advantages that the device is simple to manufacture, the actual length of the device can be conveniently determined according to the depth of the soft interlayer, and after short-term reinforcement is carried out, the device can be disassembled for recycling by taking out the concrete column formed by the anchor cable due to the fact that the device and the anchor cable structure are movable interfaces, and the use efficiency is improved.

Drawings

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

Fig. 2 is an overall sectional front view of the present invention.

Fig. 3 is an overall top view of the present invention.

FIG. 4 is a schematic bottom view of the sleeve, the lower fixing ring and the lower supporting rod according to the present invention.

Fig. 5 is a schematic structural view of the guide mechanism of the present invention.

Figure 6 is a schematic view of two identical slope reinforcement devices a and B joined together.

FIG. 7 is a schematic diagram of the effect of the invention in the interior of a weak interlayer and a rock slope.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a slope reinforcing device containing weak interlayer rock shown in figures 1-7, which is characterized in that: the slope reinforcing device consists of a shell mechanism and a drawing reinforcing mechanism,

the shell mechanism comprises a sleeve 11, a lower fixing ring 12, a lower support rod 13, a cross blocking rod 14, an upper fixing ring 15 and an upper support rod 16; the lower fixing rings 12 are located at the lowest end of the inner side of the shell mechanism, the number of the lower support rods 13 is four, the lower support rods are uniformly and fixedly arranged on the outer side of the lower fixing rings 12 and are fixedly connected with the inner wall of the sleeve 11, the cross-shaped blocking rods 14 are fixedly arranged at the upper portions of the lower fixing rings 12, the upper fixing rings 15 are located at the highest ends of the cross-shaped blocking rods 14 on the inner side of the shell mechanism, and the number of the upper support rods 16 is four, and the upper support rods are uniformly and fixedly arranged on the outer side of the upper fixing rings 15 and are fixedly connected with the inner wall of the sleeve 11; four guide mechanisms are uniformly distributed on the inner wall of the top of the sleeve 11 and are distributed in a rectangular shape;

pull reinforcing mechanism includes central pull rod 21, the link ring 22, adds muscle body 23, sharp-pointed part 24 and central pull rod ring 25, the link ring 22 fix at the cross center that blocks pole 14, central pull rod 21 passes upper fixed ring 15 centre bore, stretches into in sleeve 11, lower part and link ring 22 fixed connection, the equipartition has universal joint on the outer wall of link ring 22, add muscle body 23 be four, lower extreme and universal joint swing joint, upper portion lean on with four guiding mechanism respectively and connect, are equipped with apical portion 24 respectively at the top that adds muscle body 23, central pull rod upper portion has central pull rod ring 25 to make things convenient for the anchor rope to carry out stretch-draw once.

In the above structure, the cross-shaped blocking rod 14 is used for blocking the central pull rod 21 in the drawing reinforcement mechanism, so as to prevent the central pull rod 21 from falling out of the bottom of the sleeve 11.

The guide mechanism 3 comprises an installation frame 31 and guide concave wheels 32, wherein the installation frame 31 is fixedly connected with the inner wall of the sleeve 11, the guide concave wheels 32 are rotatably arranged on the inner side of the installation frame 31 through pin shafts, and the upper parts of the four reinforcing bodies 23 are respectively attached to the four guide concave wheels 32.

The invention is provided with a plurality of circular holes which are communicated up and down at equal intervals along the length direction on the periphery of the sleeve 11.

The invention discloses a method for reinforcing a rock slope with a weak interlayer, which is characterized in that a rock slope reinforcing device with a weak interlayer is adopted to reinforce the rock slope with the weak interlayer, and the method comprises the following specific steps:

step 1, firstly, measuring the position of the joint of the weak interlayer and the rock slope as a potential sliding surface 5,

step 2, selecting two identical side slope reinforcing devices A and B, connecting the two side slope reinforcing devices in series by respectively penetrating through upper and lower through round holes of two sleeves of the two side slope reinforcing devices A and B by using a plurality of steel strands, connecting central pull rod rings of the side slope reinforcing devices A and B in series by using an anchor cable 6 to form a side slope reinforcing component, and binding the steel strands penetrating out of the bottom ends of sleeve holes by using iron wires to prevent the steel strands from falling off; as shown in figures 6 and 7 of the drawings,

step 3, anchor cable installation

Step 3.1, calibrating the drilling position of the side slope anchor cable, and marking the installation position of the anchor cable according to design requirements according to the drilling central line determined by measurement;

step 3.2, drilling an anchor cable hole by using a drilling machine, and connecting a central pull rod ring of the side slope reinforcing device A after the side slope reinforcing device A is connected in series with a central pull rod ring of the side slope reinforcing device B through a prestressed anchor cable;

3.3, taking the slope reinforcement device A as an anchor cable head, penetrating into an anchor cable hole for anchoring, so that the reinforcement device A is anchored into a hard rock body after the slope reinforcement assembly is unfolded, and a sleeve of the slope reinforcement device B is arranged at the joint of the soft interlayer and the hard rock body;

step 4, grouting

Step 4.1, before grouting, pulling a central pull rod ring 25 of a sleeve of a side slope reinforcing device B, tensioning an anchor cable for the first time, enabling the anchor cable on the upper part of the sleeve of the side slope reinforcing device B to drive the central pull rod to ascend, driving the anchor cable on the upper part of the sleeve of the side slope reinforcing device A at the same time, driving a central pull rod 21 of a device A to ascend, further enabling two central pull rods to drive respective connecting lantern rings to ascend at the inner sides of two sleeves, opening four reinforcement bodies by taking the central pull rod as a center under the limitation of an upper fixing ring, limiting and supporting the reinforcement bodies by a guide concave wheel in the opening process of the reinforcement bodies, rotating the guide concave wheel to drive the reinforcement bodies to move, enabling the top tip part of the side slope reinforcing device A to be fixed with the deep geological region, and enabling the top tip part of the side slope reinforcing device B to penetrate into an interlayer for fixing;

and 4.2, grouting an inner anchor section into the anchor cable hole, anchoring the slope reinforcement device A at a reserved position, performing secondary tensioning when the mortar of the anchor section and the anchor pier concrete meet the design strength requirement, and finally performing free end grouting to finish the anchor cable construction.

Finally, it should be noted that: in the description of the present invention, it is to be understood that the terms "center", "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Claims (1)

1. A method for reinforcing a rock slope with a weak interlayer is characterized in that a slope reinforcing device is adopted to reinforce the rock slope with the weak interlayer, the slope reinforcing device consists of a shell mechanism and a drawing reinforcing mechanism,

the shell mechanism comprises a sleeve (11), a lower fixing ring (12), a lower support rod (13), a cross blocking rod (14), an upper fixing ring (15) and an upper support rod (16); the lower fixing rings (12) are located at the lowest end of the inner side of the shell mechanism, the number of the lower support rods (13) is four, the lower support rods are uniformly and fixedly arranged on the outer side of the lower fixing rings (12) and are fixedly connected with the inner wall of the sleeve (11), the cross-shaped blocking rods (14) are fixedly arranged on the upper portions of the lower fixing rings (12), the upper fixing rings (15) are located at the highest end of the inner side of the shell mechanism (1), the number of the upper support rods (16) is four, the upper support rods are uniformly and fixedly arranged on the outer side of the upper fixing rings (15) and are fixedly connected with the inner wall of the sleeve (11); four guide mechanisms (3) are uniformly distributed on the inner wall of the top of the sleeve (11);

the drawing and reinforcing mechanism comprises a central pull rod (21), a connecting sleeve ring (22), a reinforcement body (23), a reinforcement body tip (24) and a central pull rod ring (25), wherein the connecting sleeve ring (22) is fixed at the center of the cross-shaped blocking rod (14), the central pull rod ring (25) is connected with an external anchor cable, the central pull rod (21) penetrates through a central hole of the upper fixing ring (15) and extends into the sleeve (11), the lower part of the central pull rod is fixedly connected with the connecting sleeve ring (22), universal joints are uniformly distributed on the outer wall of the connecting sleeve ring (22), the reinforcement bodies (23) are four, the lower ends of the reinforcement bodies are movably connected with the universal joints, the upper parts of the reinforcement bodies are respectively abutted against four guide mechanisms, and tip parts (24) are respectively arranged at the top of the reinforcement bodies (23);

the guide mechanism (3) comprises an installation frame (31) and guide concave wheels (32), the installation frame (31) is fixedly connected with the inner wall of the sleeve (11), the guide concave wheels (32) are rotatably arranged on the inner side of the installation frame (31) through pin shafts, and the upper parts of the four reinforcement bodies (23) are respectively attached to the four guide concave wheels (32);

a plurality of circular holes which are communicated up and down are formed on the periphery of the sleeve (11) at equal intervals along the length direction;

the method comprises the following specific steps:

step 1, firstly, measuring the position of the joint of the weak interlayer and the rock slope as a potential sliding surface (5),

step 2, selecting two identical slope reinforcing devices A and B, connecting the two slope reinforcing devices in series by respectively penetrating through vertically-through round holes of two sleeves (11) of the two slope reinforcing devices A and B through a plurality of steel strands, connecting the two devices in series by a central pull rod ring (25) through an anchor rope (6) to form a slope reinforcing component, and binding the steel strands penetrating out of the bottom ends of the sleeves (11) through iron wires to prevent the steel strands from falling off;

step 3, anchor cable installation

Step 3.1, calibrating the drilling position of the side slope anchor cable, and marking the installation position of the anchor cable according to design requirements according to the drilling central line determined by measurement;

step 3.2, drilling an anchor cable hole by using a drilling machine, and connecting a central pull rod ring (25) of the side slope reinforcing device A and a central pull rod ring (25) of the side slope reinforcing device B which are connected in series with a prestressed anchor cable;

3.3, taking a sleeve (11) of the slope reinforcement device A as an anchor cable head, penetrating into an anchor cable hole for anchoring, so that the slope reinforcement device A is anchored into a hard rock body after the slope reinforcement component is unfolded, and the sleeve (11) of the slope reinforcement device B is placed on a potential sliding surface;

step 4, grouting

Step 4.1, before grouting, pulling a central pull rod ring (25) of a slope reinforcement device B, tensioning an anchor cable for the first time, so that the anchor cable on the upper part of a sleeve (11) of the slope reinforcement device B drives the central pull rod (21) to ascend, and simultaneously drives the anchor cable on the upper part of the sleeve (11) of the slope reinforcement device A to drive the central pull rod (21) to ascend, so that two central pull rods (21) drive respective connecting sleeve rings (22) to ascend inside the two sleeves, under the limitation of an upper fixing ring (15), four reinforcement bodies (23) are opened by taking the central pull rod (21) as the center, in the process of opening the reinforcement bodies (23), a guide concave wheel (32) limits and supports the reinforcement bodies (23), and simultaneously the guide concave wheel (32) rotates to drive the reinforcement bodies (23) to move, so that a top tip part (24) of the slope reinforcement device A is fixed with the deep geological part, simultaneously, the top tip part (24) of the slope reinforcing device B is penetrated into the interlayer for fixing;

and 4.2, grouting an inner anchor section into the anchor cable hole, anchoring the slope reinforcement device A at a reserved position, performing secondary tensioning when the mortar of the anchor section and the anchor pier concrete meet the design strength requirement, and finally performing free end grouting to finish the anchor cable construction.

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