CN217632521U - Upward type orifice anchoring device mounted after underground engineering clings to surrounding rock - Google Patents

Abstract

The utility model discloses an upward-looking type orifice anchoring device installed after surrounding rock is tightly attached to underground engineering, which comprises an anchor rope, an anchor backing plate and a tensioning jack for tensioning the anchor rope, wherein a through hole for the anchor rope to pass through is arranged on the anchor backing plate, one side of the anchor backing plate is provided with a transverse grouting hole communicated with the through hole, the transverse grouting hole is connected with an orifice grouting pipe, and the outer end of the orifice grouting pipe is bent downwards; the tensioning jack is equipped with the tensioning bracket who fixes on the operation platform, the tensioning bracket is the multilayer frame construction that a plurality of reinforcing bars were built, the tensioning jack is located the region that multilayer frame construction encloses, the tensioning bracket activity is provided with two at least levels and builds taking out in multilayer frame construction's region and insert fixed steel bar, the tensioning jack is placed taking out and is inserted fixed steel bar, be provided with solid fixed ring on every layer of all horizontal reinforcing bar of tensioning bracket, take out and insert fixed steel bar one end and insert in the fixed ring, the other end overlap joint is on opposite horizontal reinforcing bar, can realize the quick prestressing force of formula of rising and stretch out and drill way mud jacking, reach and consolidate the country rock mesh.

Description

Upward-looking type orifice anchoring device installed after underground engineering clings to surrounding rock

Technical Field

The utility model relates to a construction tool technical field, concretely relates to formula drill way anchor that upwards leans on of installation behind the country rock is hugged closely to underground works.

Background

The construction of roads and railways in China is fast, in order to ensure the safety of the roads and the railways, the application of prestressed products is absolutely not necessary, the prestressed anchor used in a concrete structure mainly comprises parts such as an anchor backing plate, an anchor plate, a clamping piece and the like, in the construction process of a beam plate of the roads and the railways, firstly, the anchor backing plate and reinforced spiral steel bars are pre-embedded in beam plate concrete, then, prestressed steel strands penetrate through the anchor backing plates at two ends of the beam plate, the prestressed steel strands are fixed through the anchor plate and the clamping piece, and then, the prestressed steel strands are tensioned through a tensioning machine to enable the beam plate to generate certain radian, so that the beam plate has certain prestress, and the effects of impact resistance and earthquake resistance can be achieved. The anchor backing plate is used as an important construction in the anchorage device, is directly embedded in concrete, mainly plays a role in load transmission and stress dispersion, and transmits the prestress applied by the anchorage device to the structure by the anchor backing plate so as to bear huge stress. At present, the prestressed anchor cable is widely applied to foundation pits, roadbed slopes and underground supporting engineering, and force is transmitted from the surface of a rock-soil body to a stable stratum mainly in a given direction and load, so that the rock-soil body is kept stable. The anchor backing plate is a device for locking the tensile force of the anchor cable on an external structure, and is usually locked on a pile, a waist beam or a surrounding rock alignment plane on a foundation pit, a side slope or an underground engineering support. And finally, performing tensioning operation by adopting an inner-penetrating jack.

At present, a round anchor backing plate is mainly cast iron or a cast steel piece integrally formed by casting, a round hole is formed in the middle of a square steel plate, the aperture is slightly smaller than a working anchorage device, the anchor backing plate is mainly used for a downward-inclined anchor cable to be used more, the anchor backing plate is used for a slope upward anchor cable, the anchor end and the free end need to be separately grouted for reinforcement, grouting is performed from bottom to top, an exhaust pipe needs to be embedded at the tail end of a functional section, a targeted anchor backing plate, especially an anchor cable which exceeds 9 bundles, is installed on the market of the upward-inclined anchor cable or vertically upward anchor cable, the exhaust pipe, the grouting pipe and an anchor cable steel strand are added, and the existing anchor backing plate is not provided with a drilling space and can be used (13 holes can be formed in the anchor backing plate with the diameter of 150 phi at most).

At present, a lot of methods are used for uniformly filling fine yarn clusters or towels coated with polyurethane into upward holes, the hole sealing length is more than 1m, and then a wooden plug is driven into an orifice so as to tightly block the upward holes and prevent the polyurethane from foaming and expanding under excessive pressure and then from flowing out of the orifice, so that the hole sealing fails. In field operation, the stability degree of the wooden plugs can not meet the requirements, gaps among the wooden plugs can be large, and polyurethane in the upward hole often overflows from the hole after being expanded, so that hole sealing of the hole fails and the next grouting operation can not be carried out. It is therefore desirable to develop a device that prevents the polyurethane from expanding and escaping through the orifice.

If the traditional air bag type grout stopping ring is adopted during upward hole grouting, a block is easily scraped and hung with a hole wall in the anchoring process, anchoring construction is influenced, the dropped rock blocks damage an air bag, the grout stopping ring fails, and pressure boosting screen grout cannot be performed. The two grout stopping rings have high manufacturing cost and complex operation process or are too simple and easy to completely lose efficacy in practical application, the purpose of boosting and shielding grout cannot be achieved according to the technical requirements of multi-hydropower-station design, and the grout is easily mixed in a tensioning section, so that the construction quality of the whole anchor cable is influenced. In addition, in the process of tensioning the upward-looking anchor cable, due to the fact that the operation space is small (the platform only accommodates 1-2 people for construction), the anchor cable tensioning tool is heavy (the anchor cable tensioning tool is of a straight-through type and weighs more than 120 kilograms), and the tensioning tool is difficult to install manually.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the technical problem who exists among the prior art, creatively provide a formula drill way anchor device that rises of installation behind the country rock is hugged closely to underground engineering very much, simple structure can realize that prestressing force stretch-draw and drill way mud jacking reach and consolidate the country rock purpose.

In order to realize the above purpose of the utility model, the utility model provides an upward orifice anchoring device installed after the underground engineering clings to the surrounding rock, which comprises an anchor cable, an anchor backing plate and a tensioning jack for tensioning the anchor cable, wherein the anchor backing plate is provided with a through hole for the anchor cable to pass through, one side of the anchor backing plate is provided with a transverse grouting hole communicated with the through hole, the transverse grouting hole is connected with an orifice grouting pipe, and the outer end of the orifice grouting pipe is bent downwards;

the utility model discloses a multi-layer framework structure of multi-layer framework structure, including the jack-draw, the jack-draw is equipped with the stretch-draw support of fixing on the operation platform, the multi-layer framework structure that the jack-draw was built for a plurality of reinforcing bars, the jack-draw is located the region that multi-layer framework structure encloses, the jack-draw activity is provided with two at least levels and builds taking out and insert fixed reinforcing bar in multi-layer framework structure's region, the jack-draw is placed and is being taken out and insert fixed reinforcing bar on, be provided with solid fixed ring on every layer of all horizontal reinforcing bar of jack-draw support, take out and insert fixed reinforcing bar one end and insert fixed intra-annular, the other end overlap joint is on opposite horizontal reinforcing bar, thereby it realizes the anchor-draw to take out to insert fixed reinforcing bar through the adjustment and adjust the jack-draw on the solid fixed ring that inserts different layers.

In the scheme, the method comprises the following steps: one end of the pulling and inserting fixed steel bar is provided with a rectangular abutting block which is abutted to the fixed ring, so that the pulling and inserting fixed steel bar is T-shaped. Can support on solid fixed ring through the rectangle, avoid taking out to insert fixed reinforcing bar other end and control the skew, lead to two to take out to insert the distance of fixed reinforcing bar other end too big and cause the tensioning jack to drop.

In the scheme, the method comprises the following steps: all solid fixed rings all lie in same one side of stretch-draw support, the horizontal reinforcing bar of stretch-draw support opposite side also is equipped with the solid fixed ring that is used for fixed taking out to insert the fixed reinforcing bar other end, take out the both ends of inserting fixed reinforcing bar and all lie in the solid fixed ring, can fix the both ends of inserting fixed reinforcing bar taking out, avoid taking out to insert fixed reinforcing bar and slide.

In the scheme, the method comprises the following steps: the drawing and inserting fixed steel bars are even and in a group, when the drawing and inserting fixed steel bars are located on the bottommost layer, a group of drawing and inserting fixed steel bars are always built on the lower side of the drawing and inserting jack except the drawing and inserting jack, and the drawing and inserting fixed steel bars can be located on the lower side to ensure that the drawing and inserting jack does not fall out.

In the scheme, the method comprises the following steps: the transverse grouting holes are arranged close to the side slope sections of the surrounding rocks.

Since the technical scheme is used, the beneficial effects of the utility model are that: the anchor cable has the advantages of simple processing, less material consumption, labor saving, low cost, simple structure, capability of realizing prestress tensioning and orifice grouting and achieving the purpose of reinforcing surrounding rock, and the application range of the anchor cable is expanded. On the basis of the original anchor backing plate, an orifice grouting pipe is additionally arranged, so that the upward type full-length bonding type anchor cable free section grouting pipe is convenient to install, and free end grouting is convenient to carry out. The tensioning support of the multilayer frame structure form that sets up can protect the tensioning jack wherein, combines the drawing and inserting fixed steel bar and solid fixed ring that set up, supports the tensioning jack from the bottom to can adjust the position of tensioning jack, realize the tensioning anchor, convenient and fast.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of the present invention in use;

FIG. 2 is a schematic view of the structure of the tension bracket and the inserted and fixed steel bar;

FIG. 3 is a schematic view of the construction of the steel bar insertion and extraction fixture;

FIG. 4 is a schematic view of an anchor pad;

figure 5 is a schematic view of an alternate view of the anchor pad.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1-5, an overhead type hole anchoring device installed after underground engineering clings to surrounding rock comprises an anchor cable 1, an anchor backing plate 2 and a tensioning jack 3 for tensioning the anchor cable 1. The anchor backing plate 2 is provided with a through hole 2b for the anchor cable 1 to pass through, one side of the anchor backing plate 2 is provided with a transverse grouting hole communicated with the through hole 2b, and preferably, the transverse grouting hole is arranged close to a side slope section of the surrounding rock. The transverse grouting hole is connected with an orifice grouting pipe 2a, and the outer end of the orifice grouting pipe 2a is bent downwards.

The tensioning jack 3 is provided with a tensioning support 4 fixed on the operation platform B, the tensioning support 4 is a multi-layer frame structure built by a plurality of steel bars, and the tensioning jack 3 is located in an area surrounded by the multi-layer frame structure. The frame structure is arranged, so that shielding of the tensioning jack 3 can be reduced as much as possible, and the left, right, front and rear positions of the tensioning jack 3 can be adjusted conveniently. The tensioning support 4 is movably provided with two pulling and inserting fixed steel bars 5 which are horizontally built in the area of the multi-layer frame structure, the tensioning jack 3 is placed on the pulling and inserting fixed steel bars 5, and the two pulling and inserting fixed steel bars 5 are arranged in parallel. Each layer of the horizontal reinforcing steel bars of the tensioning support 4 is provided with a fixing ring 4a, one end of the pulling and inserting fixing reinforcing steel bar 5 is inserted into the fixing ring 4a, the other end of the pulling and inserting fixing reinforcing steel bar is lapped on the opposite horizontal reinforcing steel bar, and the pulling and inserting fixing reinforcing steel bar 5 is inserted into the fixing rings 4a on different layers through adjustment, so that the tensioning jack 3 is adjusted to achieve tensioning and anchoring.

Preferably, one end of the pull-insert fixing steel bar 5 is provided with a rectangular abutting block 5a for abutting against the fixing ring 4a, so that the pull-insert fixing steel bar 5 is T-shaped. Can support block 5a through the rectangle and support on solid fixed ring 4a, avoid taking out and insert 5 other ends of fixed reinforcing bar and control the skew, lead to two to take out and insert 5 other ends of fixed reinforcing bar apart from too big and cause tensioning jack 3 to drop.

Preferably, all solid fixed rings 4a all lie in the same one side of stretch-draw support 4, and the horizontal reinforcing bar of stretch-draw support 4 opposite side also is equipped with the solid fixed ring 4a that is used for the fixed reinforcing bar 5 other end of inserting of taking out, and the both ends of inserting fixed reinforcing bar 5 of taking out all lie in solid fixed ring 4a, can fix the both ends of inserting fixed reinforcing bar 5 of taking out, avoid inserting fixed reinforcing bar 5 of taking out and slide.

Preferably, the number of the drawing and inserting fixed steel bars 5 is even, and every two fixed steel bars are in a group. Except that when the tensioning jack 3 is located at the bottommost layer, a group of pulling and inserting fixed steel bars 5 are always built on the lower side of the tensioning jack 3, and the tensioning jack 3 can be ensured not to fall out through the group of pulling and inserting fixed steel bars 5 located on the lower side.

Claims (5)

1. The utility model provides an up-looking type drill way anchor that underground works hug closely behind country rock installation, stretch-draw jack (3) including anchor rope (1), anchor backing plate (2) and taut anchor rope (1), be equipped with on anchor backing plate (2) and be used for supplying through-hole (2 b) that anchor rope (1) passed, its characterized in that: one side of the anchor backing plate (2) is provided with a transverse grouting hole communicated with the through hole (2 b), the transverse grouting hole is connected with an orifice grouting pipe (2 a), and the outer end of the orifice grouting pipe (2 a) is bent downwards;

stretch-draw jack (3) are equipped with stretch-draw support (4) of fixing on operation platform (B), stretch-draw support (4) are the multilayer frame structure that a plurality of reinforcing bars were built, stretch-draw jack (3) are located the region that multilayer frame structure encloses, stretch-draw support (4) activity is provided with two at least levels and builds drawing and inserting fixed reinforcing bar (5) in multilayer frame structure's region, stretch-draw jack (3) are placed on drawing and inserting fixed reinforcing bar (5), be provided with solid fixed ring (4 a) on the horizontal reinforcing bar of stretch-draw support (4), draw and insert fixed reinforcing bar (5) one end and insert solid fixed ring (4 a), the other end overlap joint is on the horizontal reinforcing bar opposite, thereby insert solid fixed ring (4 a) on different layers through the adjustment and adjust stretch-draw jack (3) and realize stretch-draw anchoring.

2. The overhead hole anchoring device for underground works mounted next to surrounding rocks according to claim 1, wherein: one end of the pull-plug fixed steel bar (5) is provided with a rectangular abutting block (5 a) which is abutted against the fixed ring (4 a), so that the pull-plug fixed steel bar (5) is T-shaped.

3. An uphole port anchoring device installed in the immediate vicinity of surrounding rock in a subterranean work according to claim 1 or 2, wherein: all solid fixed ring (4 a) all lie in the same one side of stretch-draw support (4), the horizontal reinforcing bar of stretch-draw support (4) opposite side also is equipped with and is used for fixed solid fixed ring (4 a) of inserting fixed reinforcing bar (5) the other end of taking out, the both ends of inserting fixed reinforcing bar (5) all lie in solid fixed ring (4 a) taking out.

4. The overhead hole anchoring device for underground works mounted next to surrounding rocks according to claim 3, wherein: the pulling and inserting fixed steel bars (5) are even in number and are grouped pairwise, and except for the fact that the tensioning jack (3) is located on the bottommost layer, a group of pulling and inserting fixed steel bars (5) are always built on the lower side of the tensioning jack (3).

5. The overhead hole anchoring device for underground works mounted next to surrounding rocks according to claim 1, wherein: the transverse grouting holes are arranged close to the side slope sections of the surrounding rocks.

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