CN216110517U - Full-casing pipe following drilling equipment for loose stone filling slope anchor cable eccentric down-the-hole hammer - Google Patents

Abstract

The utility model relates to the technical field of anchor cable construction, and discloses loose rock-filling slope anchor cable eccentric down-the-hole hammer full-casing pipe-following drilling equipment, which comprises an eccentric down-the-hole hammer arranged on a scaffold on a slope, wherein a support frame is arranged on a workbench and provided with a guide surface, and a drilling machine is arranged on the support frame; the eccentric down-the-hole hammer is arranged on the guide surface and comprises a drilling drill rod and a drilling drill bit, wherein the drilling drill rod is sleeved with a full sleeve, and the drilling drill rod is provided with a front edge section penetrating through the front end of the full sleeve; the front section is sleeved with an eccentric round block with the diameter smaller than that of the full sleeve, the eccentric round block is provided with an eccentric strip groove, the inner end of the eccentric strip groove starts from the center of the eccentric round block, the outer end of the eccentric strip groove extends along the radial direction of the eccentric round block, and the width of the eccentric strip groove is larger than that of the front section; the drilling bit is driven by a drilling machine to drill into the side slope to form an anchor cable hole, and the whole sleeve is embedded into the anchor cable hole; the drilling equipment has the advantages of high rock breaking efficiency, good anchoring quality, simple and convenient operation and low comprehensive cost.

Description

Full-casing pipe following drilling equipment for loose stone filling slope anchor cable eccentric down-the-hole hammer

Technical Field

The utility model relates to the technical field of anchor cable construction, in particular to a full-casing pipe-following drilling device for an eccentric down-the-hole hammer of an anchor cable for a loose stone-filling side slope.

Background

When anchor cable drilling construction is carried out on a loose stone-filling side slope, the following problems exist, 1) the crawler-type anchor cable drilling machine is heavy, and a common scaffold operation platform is difficult to meet the operation requirement; 2) the rock filling distribution is more, the block size is large, the hardness is high, the hole forming and rock breaking efficiency of a common anchor cable drilling machine is low, the drilling speed is low, and the comprehensive cost is high; 3) when a drilling machine drills, the loose filling soil of the loose filling stone side slope is easy to collapse, so that the hole forming is difficult, and the quality of the formed hole and the anchor body is greatly influenced.

In Shenzhen salt pan resource utilization environment garden slope support engineering, the slope is a loose stone filling slope, is formed when a road is built on the top of the slope, and is mainly formed by building mountain-opening stone filling and loose filling, the minimum distance between the slope bottom and a garden building is less than 4m, a slope toe is provided with a stone-building retaining wall, and the slope support design adopts prestressed anchor cables, lattice beams and concrete baffles for support.

In actual construction, in the anchor hole drilling process, a steel pipe scaffold is set up for construction, the operation space is narrow and can only meet the requirement of small-size equipment operation, drilling needs to penetrate through a side slope masonry retaining wall and a deep rockfill stratum, a common rotary drill bit is stuck when drilling meets irregular rockfill, a sleeve is broken, and drilling is very difficult; meanwhile, hole collapse occurs in the drilling process of loose filling of the side slope, and the construction efficiency and quality are greatly influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide full-casing pipe-following drilling equipment for an anchor cable eccentric down-the-hole hammer of a loose rockfill side slope, and aims to solve the problems of low construction efficiency and poor quality when anchor cable construction is carried out in the loose rockfill side slope in the prior art.

The utility model is realized in this way, the loose stone-filling side slope anchor cable eccentric down-the-hole hammer full casing pipe following drilling equipment comprises an eccentric down-the-hole hammer arranged on a scaffold on a side slope, a support frame is arranged on a workbench, the support frame is provided with a guide surface which is vertically arranged with the side slope, and a drilling machine is arranged on the support frame;

the eccentric down-the-hole hammer is arranged on the guide surface and comprises a drilling drill rod and a drilling drill bit, the drilling drill bit is connected to the front end of the drilling drill rod, and the rear end of the drilling drill rod is connected with a drilling machine; the drilling drill rod is sleeved with a full casing, the drilling drill bit is arranged in front of the front casing, and the drilling drill rod is provided with a front edge section penetrating through the front end of the full casing;

the front edge section is sleeved with an eccentric round block with the diameter smaller than that of the full sleeve, the eccentric round block is provided with an eccentric strip groove, the inner end of the eccentric strip groove starts from the center of the eccentric round block, the outer end of the eccentric strip groove extends along the radial direction of the eccentric round block, and the width of the eccentric strip groove is larger than that of the front edge section; the drilling drill bit is aligned with the anchor cable hole position on the side slope, the drilling machine is driven to drill into the side slope to form the anchor cable hole, and the full sleeve is embedded into the anchor cable hole.

Furthermore, the support frame is provided with a guide rail, the guide rail and the guide surface extend in the same direction, the guide rail is provided with a moving seat, the drilling machine is connected to the moving seat, and when the drilling bit drills, the moving seat moves along the guide rail.

Further, a longitudinal plate is arranged on the guide surface of the support frame, and the longitudinal plate is perpendicular to the guide surface; the anchor cable hole site is characterized in that a positioning hole aligned with the anchor cable hole site is formed in the longitudinal plate, embedding strips extending forwards are convexly arranged on the upper portion and the lower portion of the longitudinal plate respectively, the embedding strips are perpendicular to the longitudinal plate, two embedded grooves are formed in the retaining wall of the side slope respectively and are arranged above and below the anchor cable hole site respectively, and the embedding strips are correspondingly embedded into the two embedded grooves respectively.

Further, the longitudinal plate abuts against the retaining wall; and a connecting strip which is arranged up and down is arranged between the two embedding strips, and the upper end and the lower end of the connecting strip are respectively and correspondingly connected with the two embedding strips.

Further, the full sleeve comprises a pipe body and a pipe shoe, and the pipe shoe is in threaded connection with the front end of the pipe body; the inside wall of pipe shoe is equipped with the first step ring of arranging outwards, first step ring encircles the circumference of pipe shoe arranges, the periphery of boring the drilling rod is equipped with the second step ring of arranging inwards, the circumference of second step ring encircles the drilling rod arranges, second step ring from outside to inside butt is in on the first step ring.

Furthermore, the periphery of the drilling drill rod is provided with a transition step ring which is obliquely arranged, the transition step ring is circumferentially arranged around the drilling drill rod, the outer end of the transition step ring is in butt joint with the inner end of the second step ring, the inner end of the transition step ring is obliquely arranged towards the drilling drill rod, and the inclination angle of the transition step ring is larger than that of the second step ring.

Further, the width of the eccentric strip groove is gradually reduced along the direction from the inside to the outside of the eccentric strip groove.

Further, along the extending direction of the eccentric strip groove, the outer end of the eccentric strip groove is sunken outwards to form an outward-expanded groove, and the diameter of the outward-expanded groove is smaller than the width of the inner end of the eccentric strip groove and smaller than the diameter of the front edge section.

Furthermore, the inner end of the eccentric strip groove is inwards recessed to form an inner expanding groove, and the diameter of the inner expanding groove is larger than the width of the inner end of the eccentric strip groove.

Furthermore, the periphery of the outer end of the eccentric round block is provided with a plurality of cutting grooves, the cutting grooves are arranged along the circumferential direction of the eccentric round block at intervals, and cutting blocks are formed between the adjacent cutting grooves.

Compared with the prior art, the full-casing pipe-following drilling equipment for the eccentric down-the-hole hammer of the anchor cable for the loose stone filling slope, provided by the utility model, has the following technical advantages:

1) the rock breaking efficiency is high, the rock filling layer and the soil body are subjected to high-frequency reciprocating impact by adopting an eccentric down-the-hole hammer for drilling, the rock breaking efficiency is high, the drilling speed is high, and the construction efficiency is greatly improved;

2) the anchoring quality is good, the rock breaking efficiency is improved, hole collapse in the hole forming process is effectively prevented at the same time by adopting the eccentric down-the-hole hammer full-casing retaining wall drilling construction, and the quality of a formed hole and an anchoring body is ensured by pulling out the retaining wall full casing after primary grouting;

3) the pipe drawing device is simple and convenient to operate, can operate on a common scaffold platform, and is simple and convenient to operate as long as the drilling machine is simply fixed on the support frame, and meanwhile, the pipe drawing speed of the sleeve is high.

4) The comprehensive construction cost is low, the drilling construction of the anchor cable holes has low requirements on the workbench of the scaffold, the drilling efficiency is high, the construction period is greatly shortened, and the total comprehensive construction cost is low.

Drawings

FIG. 1 is a cut-away schematic view of an eccentric down-the-hole hammer provided by the present invention in cooperation with a full casing;

FIG. 2 is an enlarged schematic view of FIG. 1;

FIG. 3 is a cut-away schematic view of a pipe boot provided by the present invention;

FIG. 4 is a schematic front view of the pulling apparatus of the present invention in cooperation with a full cannula;

FIG. 5 is a schematic front view of the support frame of the present invention in cooperation with a slope;

fig. 6 is a front view schematically illustrating an eccentric round block according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

Referring to fig. 1-6, preferred embodiments of the present invention are shown.

The full-casing pipe-following drilling equipment for the eccentric down-the-hole hammer of the anchor cable of the loose stone-filling side slope is suitable for the drilling construction of the anchor cable hole of the high side slope 304, which is narrow in construction site and implemented on a scaffold platform; the anchor cable hole drilling construction method is suitable for anchor cable hole drilling construction of crossing a masonry retaining wall, loose filling stone or a hard rock stratum; the anchor cable hole drilling method is suitable for anchor cable hole construction with the drilling depth not greater than 40m (the length of a pipe following full sleeve is not greater than 40m) and the hole diameter not greater than 300 mm.

The full-casing pipe following drilling equipment for the anchor cable eccentric down-the-hole hammer of the loose stone-filling side slope comprises an eccentric down-the-hole hammer arranged on a scaffold on a side slope 304, wherein the scaffold is provided with a horizontally arranged workbench, the workbench is provided with a support frame 300, the support frame 300 is provided with a guide surface, the guide surface is inclined and vertical to a slope surface, and a drilling machine 301 is arranged at the rear end of the support frame 300;

the eccentric down-the-hole hammer is arranged on the guide surface and comprises a drilling rod 102 and a drilling bit 104, wherein a full casing is sleeved outside the drilling rod 102, the rear end of the drilling rod 102 is connected with a drilling machine 301, the drilling bit 104 is connected with the front end of the drilling rod 102, the drilling bit 104 penetrates through the full casing and extends to the front of the full casing, the front part of the drilling rod 102 is provided with a front edge section penetrating through the front end of the full casing, an eccentric round block 103 with the diameter smaller than that of the full casing is sleeved on the front edge section, the eccentric round block 103 is provided with an eccentric strip groove 1031, the inner end of the eccentric strip groove 1031 is arranged at the center of the eccentric round block 103, the outer end of the eccentric strip groove 1031 extends along the radial direction of the eccentric round block 103, and the width of the eccentric strip groove 1031 is larger than the diameter of the front edge section;

the drilling bit 104 is aligned and vertical to the anchor cable hole site, the drilling drill rod 102 rotates forwards to drive the drilling bit 104 to drill the rock filling layer and the soil layer of the side slope 304 inwards to form an anchor cable hole, and the whole sleeve is inserted into the anchor cable hole;

when the drilling machine 301 rotates forward, the drilling bit 104 and the drilling rod 102 rotate along with the rotation, under the action of centrifugal force, at the moment, the drilling rod 102 penetrates through the outer end of the eccentric bar groove 1031, the eccentric round block 103 is arranged eccentrically, when the drilling machine 301 rotates reversely, the drilling rod 102 penetrates through the inner end of the eccentric bar groove 1031, at the moment, the eccentric arrangement is avoided, and therefore the drilling rod 102, the drilling bit 104 and the eccentric round block 103 can outwards exit out of the full casing.

The full-casing pipe-following drilling equipment for the eccentric down-the-hole hammer of the anchor cable for the loose stone filling side slope has the following technical advantages:

1) the rock breaking efficiency is high, the rock filling layer and the soil body are subjected to high-frequency reciprocating impact by adopting an eccentric down-the-hole hammer for drilling, the rock breaking efficiency is high, the drilling speed is high, and the construction efficiency is greatly improved;

2) the anchoring quality is good, the rock breaking efficiency is improved, hole collapse in the hole forming process is effectively prevented at the same time by adopting the eccentric down-the-hole hammer full-casing retaining wall drilling construction, and the quality of a formed hole and an anchoring body is ensured by pulling out the retaining wall full casing after primary grouting;

3) the pipe drawing device is simple and convenient to operate, can operate on a common scaffold platform, and is simple and convenient to operate as long as the drilling machine 301 is simply fixed on the support frame 300, and meanwhile, the pipe drawing speed of the sleeve is high.

4) The comprehensive construction cost is low, the drilling construction of the anchor cable holes has low requirements on the workbench of the scaffold, the drilling efficiency is high, the construction period is greatly shortened, and the total comprehensive construction cost is low.

A guide rail is arranged on the support frame 300, the guide rail and the guide surface extend in the same direction, a moving seat is arranged on the guide rail, and the drilling machine 301 is connected to the moving seat; as the drill bit 104 drills, the movable carriage moves along the guide rails to drive the drill rod 102 forward or backward.

A longitudinal plate 302 is arranged on the guide surface of the support frame 300, and the longitudinal plate 302 is vertical to the guide surface; a positioning hole 305 is formed in the longitudinal plate 302, embedding strips 303 extending forwards are respectively and convexly arranged at the upper part and the lower part of the longitudinal plate 302, the embedding strips 303 are perpendicular to the longitudinal plate 302, two embedding grooves are respectively arranged on a retaining wall of the side slope 304, and the two embedding grooves are respectively arranged above and below the anchor cable hole;

the two embedding strips 303 are correspondingly embedded into the two embedding grooves respectively, the longitudinal plate 302 abuts against the retaining wall, and the positioning holes 305 are aligned with the anchor cable hole positions; during the process of drilling the rock-fill layer and the soil layer by the drilling bit 104, the eccentric block 103, the drilling rod 102 and the full casing pipe pass through the positioning hole 305.

Like this, vertical board 302 butt is on the barricade, and imbeds respectively in the embedded groove through two embedding strips 303, can make to be connected firmly between vertical board 302 and the slope body, and in the in-process that the drilling machine 301 drove to creep into drilling rod 102 and creeps into, avoid the support frame 300 to vibrate too greatly, lead to the problem of drilling off normal.

In this embodiment, the connecting strips are vertically arranged between the two embedding strips 303, and the upper ends and the lower ends of the connecting strips are respectively and correspondingly connected with the two embedding strips 303, so that when one of the embedding strips 303 is displaced due to vibration, the other embedding strip 303 can be pulled through the connecting strip, and the structure that the embedding strips 303 are stably embedded in the embedding groove is further ensured.

The full sleeve comprises a pipe body 100 and a pipe shoe 101, wherein the pipe shoe 101 is in threaded connection with the front end of the pipe body 100; the inner side wall of the pipe shoe 101 is provided with a first step ring 1011 which is arranged outwards, the first step ring 1011 is arranged around the circumference of the pipe shoe 101, the periphery of the drilling rod 102 is provided with a second step ring 1021 which is arranged inwards, and the second step ring 1021 is arranged around the circumference of the drilling rod 102; in the construction step 3), the second step ring 1021 is abutted against the first step ring 1011 from outside to inside.

In this way, during the process of drilling by the drilling bit 104 in the slope, the first step ring 1011 and the second step ring 1021 are abutted and limited, and the whole sleeve follows the anchor cable hole to play a wall protection role.

During actual installation, the front end of the full casing with the casing shoe 101 is inserted into the anchor cable hole, then the drilling rod 102 of the eccentric down-the-hole hammer is extended into the full casing from the tail part of the full casing, the drilling bit 104 and the front edge section are extended from the front end of the full casing, and the first step ring 1011 is in abutting fit with the second step ring 1021.

The periphery of the drilling rod 102 is provided with an obliquely arranged transition step ring 1022, the transition step ring 1022 is arranged around the circumference of the drilling rod 102, the outer end of the transition step ring 1022 is butted against the inner end of the second step ring 1021, the inner end of the transition step ring 1022 is obliquely arranged towards the drilling rod 102, and the inclination angle of the transition step ring 1022 is greater than that of the second step ring 1021.

After the first step ring 1011 is matched with the second step ring 1021, the transition step ring 1022 is arranged on the periphery of the drilling rod 102, so that transition matching between the drilling rod 102 and the full casing pipe is facilitated, interference between the drilling rod 102 and the full casing pipe is avoided, and in the rotating process of the drilling rod 102, fluctuation of the drilling rod 102 with a certain size in the radial direction is facilitated, and the phenomenon that the drilling bit 104 is blocked is avoided.

Along the direction from inside to outside of the eccentric bar 1031, the width of the eccentric bar 1031 is gradually reduced, so that when the eccentric down-the-hole hammer is in a working state, the drilling rod 102 rotates forwards, the drilling rod 102 is matched with the outer end of the eccentric bar 1031, and the phenomenon that the eccentric round block 103 moves in a string mode in the eccentric rotation process is avoided.

Along the extending direction of the eccentric slots 1031, the outer ends of the eccentric slots 1031 are recessed outwards to form outward expansion slots 1032, the diameter of the outward expansion slots 1032 is smaller than the width of the outer ends of the eccentric slots 1031 and smaller than the diameter of the front edge section, thus, when the front edge section is matched with the outer ends of the eccentric slots 1031, the front edge section cannot be sunk into the outward expansion slots 1032, and the arrangement of the outward expansion slots 1032 can slow down the weight difference of the two sides of the front edge section to a certain extent, when the eccentric round block 103 is in the eccentric rotating process, under the condition of clamping, the eccentric round block cannot be clamped, and the eccentric round block 103 can be flexibly changed between the maximum eccentric diameter and the diameter of the eccentric block.

The inner end of the eccentric bar groove 1031 is recessed inward to form an inner expanded groove 1033, and the diameter of the inner expanded groove 1033 is larger than the width of the inner end of the eccentric bar groove 1031. Thus, when it is desired to withdraw the eccentric down-the-hole hammer from the full casing, the drill pipe 102 is reverse drilled and the leading section engages the inner end of the eccentric bar 1031, which facilitates withdrawal of the eccentric disc 103 from the full casing.

Because the drilling rod 102 may deflect to a certain degree during the drilling process, at this time, during the process of withdrawing the eccentric down-the-hole hammer, the drilling rod 102 may not be completely arranged coaxially with the full casing, so that when the eccentric down-the-hole hammer needs to be withdrawn from the full casing, in order to avoid the problem that the reversed eccentric round block 103 cannot be withdrawn, the adjustable range of the inner end of the eccentric bar groove 1031 is increased by providing the inner expanding groove 1033, even if the phenomena of the drilling rod 102 and the full casing deflecting occur, the position of the leading edge section between the inner end of the eccentric bar groove 1031 and the inner expanding groove 1033 can be adjusted by shaking the drilling rod 102, so as to facilitate the withdrawal of the eccentric round block 103 from the full casing.

The periphery of the outer end of the eccentric circular block 103 is provided with a plurality of cutting grooves which are arranged along the circumferential direction of the eccentric circular block 103 at intervals, and a cutting block is formed between the adjacent cutting grooves. Thus, when the eccentric round block 103 is in eccentric rotation, the soil body can be conveniently cut by utilizing the cutting speed.

In this embodiment, before the eccentric down-the-hole hammer is used for drilling, the concentric down-the-hole hammer is used for drilling through the retaining wall on the side slope, and then the eccentric down-the-hole hammer is replaced for continuous drilling until the anchor cable hole is formed.

Before drilling by using the eccentric down-the-hole hammer, the concentric down-the-hole hammer can be used for drilling through the retaining wall of the side slope firstly, which comprises the following steps:

the concentric down-the-hole hammer is arranged on the guide surface and comprises a concentric drill rod and a concentric drill bit, the concentric drill bit is connected to the front end of the concentric drill rod, the rear end of the concentric drill rod is connected with the drilling machine 301, and the concentric drill bit is aligned with and vertical to the anchor cable hole position; the drill 301 drives the concentric drill rod to rotate, meanwhile, the concentric drill bit is driven to rotate, and the concentric down-the-hole hammer is detached from the guide surface after the drill 301 is used for driving the concentric drill bit to drill through the retaining wall on the side slope 304.

After the full sleeve is sleeved in the anchor cable hole, the full sleeve in the anchor cable hole can be pulled out by using pulling-out equipment; the pulling-out equipment comprises a base 202 fixed on the retaining wall, a pulling-out hole aligned with the anchor cable hole site is formed in the base 202, hydraulic pumps perpendicular to the retaining wall are respectively arranged on two sides of the base 202, and the two hydraulic pumps are arranged on two sides of the pulling-out hole; the hydraulic pump has piston rods 201 that extend outwards, is connected with the cassette 200 with barricade parallel arrangement between two piston rods 201, and the both ends of cassette 200 are connected respectively on piston rod 201, are equipped with the card hole in the cassette 200, and the card hole aligns with the anchor rope hole site and arranges.

The base 202 is fixed on the retaining wall, the full sleeve pipe passes through the pulling hole and the clamping hole, the outer end of the clamping seat 200 is sleeved with the slip 204, the slip 204 is embedded into the gap 203 between the full sleeve pipe and the clamping hole to relatively fix the full sleeve pipe and the clamping hole, the piston rod 201 moves outwards to drive the clamping seat 200 to pull out the full sleeve pipe in the anchor cable hole.

The clamping seat 200 is fixedly arranged with the full casing by the slips 204, the base 202 is fixed on a retaining wall, at the moment, the piston rod 201 is extended, the distance between the clamping seat 200 and the base 202 is increased, the full casing can be pulled out from the anchor cable hole by a set distance, the set distance pulled out by the full casing is consistent with the extended distance of the piston rod 201, and the full casing is longer, so that the full casing needs to be pulled out for many times in order to realize the vertical pulling out of the full casing.

After the full casing is pulled out for a set distance, the slips 204 are taken down, the fixed connection between the clamping seat 200 and the full casing is loosened, the piston rod 201 retracts, the distance between the clamping seat 200 and the base 202 is shortened, then the slips 204 are used for fixedly connecting the clamping seat 200 with the full casing, the pulling-out operation is continued, and the full casing can be pulled out from the anchor cable hole after repeated operation for a plurality of times.

The slips 204 are in a ring sheet shape, the slips 204 are provided with outer side walls formed on the periphery and inner side walls perpendicular to the retaining wall, and the outer side walls are obliquely arranged towards the full casing along the direction from outside to inside;

the inner part of the slip 204 is embedded in the gap 203 between the full casing and the stuck hole, and the outer part of the slip 204 is exposed out of the gap 203 between the full casing and the stuck hole; the inside wall of the slip 204 is clamped to the outer circumference of the full casing and the edges of the slip holes abut against the outside wall of the slip 204.

The slip 204 is embedded into the gap 203 between the full casing and the clamping hole, the clamping seat 200 and the full casing are relatively fixed by the abutting action of the inner side wall and the outer side wall of the slip 204, and when the relative fixation between the clamping seat 200 and the full casing needs to be loosened, the slip 204 is directly withdrawn from the gap 203 between the full casing and the clamping hole.

After the whole sleeve is pulled out of the anchor cable hole by a set length, the whole sleeve is sleeved with a snap ring, the snap ring comprises a ring body sleeved outside the whole sleeve and a plurality of embedding strips 303 with adjustable lengths, the embedding strips 303 are arranged on the ring body and extend in the same direction, and the embedding strips 303 surround the ring body at intervals in the circumferential direction; the ring body is fixed on the retaining wall, the outer ends of a plurality of embedding strips 303 are embedded in a gap 203 between the full sleeve and the clamping hole, when the piston rod 201 drives the clamping seat 200 to move inwards, the outer ends of the embedding strips 303 abut against the inner end of the slips 204, and the slips 204 are ejected out of the gap 203 between the full sleeve and the clamping hole.

Like this, utilize the snap ring can withdraw from slips 204 from the clearance 203 between full sleeve pipe and the card hole to cassette 200 breaks away from fixed connection with full sleeve pipe, at this moment, shortens the length of embedding strip 303, readjusts cassette 200 in full sheathed tube position, carries out fixed connection with full sleeve pipe and cassette 200 through slips 204 again, thereby, can realize extracting the operation once more to full sheathed tube, the repeated operation, until will full sleeve pipe extract the position from the anchor rope hole.

Grouting can be carried out in the anchor cable hole by utilizing grouting equipment, the grouting equipment can be divided into two steps for grouting, after the anchor cable is placed in the anchor cable hole, grouting is carried out in the anchor cable hole under the first normal pressure, and the full sleeve is pulled out from the anchor cable hole; and then performing secondary high-pressure grouting in the anchor cable hole, and stretching the anchor cable and locking the anchor cable after the strength of the slurry in the anchor cable hole reaches the set requirement.

The first normal pressure grouting is carried out in a full casing, a BWF160/10 type grouting pump is adopted for grouting, the maximum flow is 160L, the maximum discharge pressure is 10MPa, a rubber pipe is connected with a hole grouting pipe from a grout outlet of the grouting pump, and the distance between a background and a grouting hole position is controlled to be not more than 50 m.

Before grouting, checking whether a power supply circuit, a grouting pump piston, a pressure gauge and the like of the pulping equipment are normal, and checking whether the connection of a slurry feeding pipeline and a grouting pipeline is smooth. And after the cement slurry is qualified, starting a grouting pump and injecting the cement slurry into the hole. And stopping grouting when the concentration of the slurry overflowing from the orifice of the anchor cable hole is consistent with that of the injected slurry.

And finishing the first normal pressure grouting of the anchor cable hole, after the full sleeve is pulled out, and curing the slurry in the anchor cable hole for 4-6 hours, and then carrying out the second high pressure grouting in the anchor cable hole.

And in the second high-pressure grouting, continuous grouting is kept, and when the slurry is leaked quickly when the loose filling stone layer is met, intermittent pump stopping is adopted for 2 hours, then grouting is carried out, and the process is repeatedly circulated until the pressure meets the design requirement.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The full-casing pipe following drilling equipment for the anchor cable eccentric down-the-hole hammer of the loose stone-filling side slope is characterized by comprising an eccentric down-the-hole hammer arranged on a scaffold on the side slope, wherein a support frame is arranged on a workbench and provided with a guide surface which is vertically arranged with the side slope, and a drilling machine is arranged on the support frame;

the eccentric down-the-hole hammer is arranged on the guide surface and comprises a drilling drill rod and a drilling drill bit, the drilling drill bit is connected to the front end of the drilling drill rod, and the rear end of the drilling drill rod is connected with a drilling machine; the drilling drill rod is sleeved with a full casing, the drilling drill bit is arranged in front of the front casing, and the drilling drill rod is provided with a front edge section penetrating through the front end of the full casing;

the front edge section is sleeved with an eccentric round block with the diameter smaller than that of the full sleeve, the eccentric round block is provided with an eccentric strip groove, the inner end of the eccentric strip groove starts from the center of the eccentric round block, the outer end of the eccentric strip groove extends along the radial direction of the eccentric round block, and the width of the eccentric strip groove is larger than that of the front edge section; the drilling drill bit is aligned with the anchor cable hole position on the side slope, the drilling machine is driven to drill into the side slope to form the anchor cable hole, and the full sleeve is embedded into the anchor cable hole.

2. The apparatus for drilling a casing of a loose fill rock slope anchor rope eccentric down-the-hole hammer as claimed in claim 1, wherein the support frame is provided with a guide rail, the guide rail and the guide surface extend in the same direction, the guide rail is provided with a movable seat, the drilling machine is connected to the movable seat, and the movable seat moves along the guide rail when the drilling bit drills.

3. The loose fill stone slope anchor rope eccentric down-the-hole hammer full casing pipe-following drilling equipment as claimed in claim 1, wherein a longitudinal plate is arranged on the guide surface of the support frame, and the longitudinal plate is perpendicular to the guide surface; the anchor cable hole site is characterized in that a positioning hole aligned with the anchor cable hole site is formed in the longitudinal plate, embedding strips extending forwards are convexly arranged on the upper portion and the lower portion of the longitudinal plate respectively, the embedding strips are perpendicular to the longitudinal plate, two embedded grooves are formed in the retaining wall of the side slope respectively and are arranged above and below the anchor cable hole site respectively, and the embedding strips are correspondingly embedded into the two embedded grooves respectively.

4. The loose fill stone slope anchor rope eccentric down-the-hole hammer full casing pipe drilling equipment of claim 3, wherein the longitudinal plate abuts against the retaining wall; and a connecting strip which is arranged up and down is arranged between the two embedding strips, and the upper end and the lower end of the connecting strip are respectively and correspondingly connected with the two embedding strips.

5. The loose fill slope anchor rope eccentric down-the-hole hammer full casing pipe drilling equipment as claimed in any one of claims 1 to 4, wherein the full casing comprises a pipe body and a pipe shoe, and the pipe shoe is in threaded connection with the front end of the pipe body; the inside wall of pipe shoe is equipped with the first step ring of arranging outwards, first step ring encircles the circumference of pipe shoe arranges, the periphery of boring the drilling rod is equipped with the second step ring of arranging inwards, the circumference of second step ring encircles the drilling rod arranges, second step ring from outside to inside butt is in on the first step ring.

6. The loose stone-filling slope anchor rope eccentric down-the-hole hammer full casing pipe following drilling device as claimed in claim 5, wherein the periphery of the drilling drill rod is provided with a transition step ring which is obliquely arranged, the transition step ring is circumferentially arranged around the drilling drill rod, the outer end of the transition step ring is butted with the inner end of the second step ring, the inner end of the transition step ring is obliquely arranged towards the drilling drill rod, and the inclination angle of the transition step ring is larger than that of the second step ring.

7. The loose-fill rock-fill slope anchor rope eccentric down-the-hole hammer full casing pipe drilling equipment as claimed in any one of claims 1 to 4, wherein the width of the eccentric strip groove is gradually reduced along the direction from inside to outside of the eccentric strip groove.

8. The loose-fill stone slope anchor cable eccentric down-the-hole hammer full casing pipe drilling equipment as claimed in claim 7, wherein along the extension direction of the eccentric strip groove, the outer end of the eccentric strip groove is recessed outwards to form an expanded groove, and the diameter of the expanded groove is smaller than the width of the inner end of the eccentric strip groove and smaller than the diameter of the leading section.

9. The loose stone-filling slope anchor cable eccentric down-the-hole hammer full casing pipe-following drilling device as claimed in claim 7, wherein the inner end of the eccentric strip groove is recessed inwards to form an inner expanding groove, and the diameter of the inner expanding groove is larger than the width of the inner end of the eccentric strip groove.

10. The loose stone-filling slope anchor rope eccentric down-the-hole hammer full casing pipe-following drilling equipment as claimed in any one of claims 1 to 4, wherein the outer end of the eccentric circular block is provided with a plurality of cutting grooves at the periphery, the plurality of cutting grooves are arranged at intervals along the circumference of the eccentric circular block, and cutting blocks are formed between adjacent cutting grooves.

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