阅读说明：本技术 卵石地层土钉钻孔设备 (Cobble stratum soil nail drilling equipment ) 是由 陈军 周少华 喻英帆 杨新都 冉全军 韩晓军 李四光 岳贤会 李学强 王华林 黄 于 2019-08-22 设计创作，主要内容包括：本发明涉及卵石地层土钉钻孔设备,涉及土钉施工的技术领域,包括水钻钻机、可拆卸连接在水钻钻机上的钻杆以及连接在钻杆上的钻头,所述钻杆设置多节,相邻所述钻杆之间螺纹连接；所述钻头包括杆体、固设在杆体周面上的多个钻齿以及固设在杆体端部的钻进部,所述钻进部呈U形,所述杆体远离钻进部的一端与钻杆连接。通过钻头将卵石块向四周挤压成孔,本发明具有结构简单、成本低、施工效率高以及易于在卵石层中成孔的优点。(The invention relates to cobble stratum soil nail drilling equipment, which relates to the technical field of soil nail construction and comprises a water drilling rig, a drill rod detachably connected to the water drilling rig and a drill bit connected to the drill rod, wherein the drill rod is provided with a plurality of sections, and the adjacent drill rods are in threaded connection; the drill bit includes the body of rod, sets firmly a plurality of brill teeth on the body of rod global and sets firmly the portion of driling at body of rod tip, the portion of driling is the U-shaped, the body of rod is kept away from the one end of the portion of driling and is connected with the drilling rod. The cobble blocks are extruded to the periphery to form holes through the drill bit, and the hole forming method has the advantages of simple structure, low cost, high construction efficiency and easiness in hole forming in the cobble layer.)

1. Cobble stratum soil nail drilling equipment, its characterized in that: the device comprises a water drilling machine (1), a drill rod (3) detachably connected to the water drilling machine (1) and a drill bit (4) connected to the drill rod (3), wherein the drill rod (3) is provided with a plurality of sections, and the adjacent drill rods (3) are in threaded connection; the drill bit (4) comprises a rod body (41), a plurality of drilling teeth (42) fixedly arranged on the circumferential surface of the rod body (41) and a drilling portion (43) fixedly arranged at the end portion of the rod body (41), the drilling portion (43) is U-shaped, and one end, far away from the drilling portion (43), of the rod body (41) is connected with the drill rod (3).

2. A pebble formation soil nail drilling apparatus according to claim 1, wherein: the water drilling machine is characterized in that the drill rod (3) is a hollow steel pipe, the water drilling machine (1) comprises an output shaft (2), the output shaft (2) is communicated with the inside of the drill rod (3), the rod body (41) is hollow inside, and overflow holes (411) are formed in the side wall of the rod body (41).

3. A pebble formation soil nail drilling apparatus according to claim 2, wherein: the output shaft (2) is in threaded connection with the drill rod (3), and the screwing direction of the threads is the same as the rotating direction of the output shaft (2).

4. A pebble formation soil nail drilling apparatus according to claim 1, wherein: the rod body (41) is in threaded connection with the drill rod (3).

5. a pebble formation soil nail drilling apparatus according to claim 1, wherein: the length of the drill rod (3) is 2-4 m.

6. A pebble formation soil nail drilling apparatus according to claim 1, wherein: drilling portion (43) include two intervals set up and creep into tooth (45), two the one side that creeps into tooth (45) back of the body mutually is the arc surface, the one end that creeps into tooth (45) and keep away from body of rod (41) has set firmly shrink platform (451).

7. A pebble formation soil nail drilling apparatus according to claim 2, wherein: the bottom of the drilling part (43) is provided with a water outlet hole (44) communicated with the inside of the rod body (41).

8. a pebble formation soil nail drilling apparatus according to claim 1, wherein: the drilling teeth (42) are arranged in a bending way towards the drilling part (43), and the end parts of the drilling teeth (42) are provided with conical sharp corners (421) towards the drilling direction.

9. A pebble formation soil nail drilling apparatus according to claim 1, wherein: and clamping grooves (5) are respectively formed in the two ends of the drill rod (3) and the side wall of one end, far away from the drilling part (43), of the rod body (41).

Technical Field

The invention relates to the technical field of soil nail construction, in particular to a cobble stratum soil nail drilling device.

Background

Soil nailing Wall (Soil Nail Wall) is an in-situ Soil body reinforcement technology. The slope of the foundation pit is reinforced by soil nails made of steel bars, a steel bar mesh is laid on the surface of the slope, and a layer of concrete surface layer is sprayed on the surface of the slope to combine with the soil slope. The construction is a complex formed by firmly bonding a reinforced rod piece (namely a soil nail or an anchor rod) arranged in a slope body with the surrounding soil body, and a supporting structure similar to a gravity retaining wall formed by surface layers.

At present, the soil nailing wall is drilled in the following three modes,

firstly, adopting a Luoyang shovel to form a hole, then inserting a steel floral tube or a steel bar into the hole, and grouting to form an anchoring body, wherein the depth of the formed hole is about 4m generally. In the pebble stratum, the stratum is hard, so that the excavation difficulty is high, and the hole forming is difficult.

and secondly, directly pressing the steel perforated pipe into the side slope by using an air pick, and then grouting the steel perforated pipe to form a soil nail. In a pebble stratum, a steel perforated pipe is easily blocked by pebbles in the pressing-in process, is hard in geology, is difficult to continuously drive when the steel perforated pipe is generally driven to about 1m, and is difficult to drive the steel perforated pipe to the designed depth

And thirdly, directly punching holes in the side slope by using an anchor rod drilling machine, then inserting steel perforated pipes into the holes, and grouting to form an anchoring body. Because stones exist in the pebble stratum, the jumbolter cannot drill holes smoothly. And the anchor rod drilling machine has high manufacturing cost and high cost.

There is therefore a need for an apparatus suitable for drilling a pebble bed formation.

disclosure of Invention

The invention aims to provide cobble stratum soil nail drilling equipment which has the advantages of simple structure, low cost, high construction efficiency and easiness in hole forming in a cobble stratum, and the problem that a traditional hole forming mode is not easy to drill in the cobble stratum is solved.

the above object of the present invention is achieved by the following technical solutions:

The cobble stratum soil nail drilling equipment comprises a water drilling rig, a drill rod detachably connected to the water drilling rig and a drill bit connected to the drill rod, wherein the drill rod is provided with a plurality of sections, and adjacent drill rods are in threaded connection; the drill bit includes the body of rod, sets firmly a plurality of brill teeth on the body of rod global and sets firmly the portion of driling at body of rod tip, the portion of driling is the U-shaped, the body of rod is kept away from the one end of the portion of driling and is connected with the drilling rod.

by adopting the technical scheme, the drill rod is arranged on the water drilling machine, the requirement on the drilling depth is met, 6-8m soil nail drilling holes can be drilled in the pebble stratum, the drilling depth can meet the requirements on the soil nail drilling holes in different geology, and the drilling depth can be controlled according to the drilling depth of the drill rod; when the drill bit is arranged to drill in a pebble stratum, the pebble blocks are shifted to two sides when the drilling part drills, so that the pebble blocks in the drilling part are extruded outwards to form guide holes with the diameter smaller than that of the soil nail holes, then pebbles in the guide holes are further extruded to two sides under the action of the drilling teeth, the guide holes are reamed, and the soil nail holes are formed and formed step by step, so that the hole forming difficulty in the pebble stratum is reduced, the construction efficiency is high, the stratum disturbance is small, and the stability is good; the soil nail holes are formed in the pebble stratum in a mode of extruding the drill bit to form the holes, the operation is simple, the construction efficiency is high, the machinery is simple, the cost is low, and the problem that drilling is difficult in the pebble stratum by adopting a traditional process is solved.

The invention is further configured to: the water drill rig comprises a drill rod, a drill rod and a water drill rig, wherein the drill rod is a hollow steel pipe, the water drill rig comprises an output shaft, the output shaft is communicated with the inside of the drill rod, the inside of the rod body is hollow, and the side wall of the rod body is provided with an overflow hole.

Through adopting above-mentioned technical scheme, hydroenergy can be through output shaft, drilling rod, spout in the spillway hole on the body of rod is to drilling, not only can cool down the drill bit, increases the durability of drill bit, can drop water in addition and spout to drilling in, soften the cobble stratum, make the cobble piece be stained with the water lubrication, the drill bit of being convenient for extrudees the cobble to both sides.

The invention is further configured to: the output shaft is in threaded connection with the drill rod, and the screwing direction of the threads is the same as the rotating direction of the output shaft.

By adopting the technical scheme, the problem that the drill rod is separated from the output shaft in the drilling process is avoided.

The invention is further configured to: the rod body is in threaded connection with the drill rod.

Through adopting above-mentioned technical scheme, simple to operate dismantles simply.

The invention is further configured to: the length of the drill rod is 2-4 m.

By adopting the technical scheme, the drill rods with different lengths can be selected according to different drilling depths.

The invention is further configured to: the drilling part comprises two drilling teeth arranged at intervals, the two surfaces of the drilling teeth, which are opposite to each other, are arc surfaces, and a contraction table is fixedly arranged at one end, far away from the rod body, of each drilling tooth.

by adopting the technical scheme, the contraction table is convenient to insert among the pebbles, so that the pebbles are extruded to two sides when rotating, and a drill bit is convenient to drill to form a drill hole; the circular arc surfaces on the two sides can reduce friction between the drill bit and the pebbles, so that the drill bit can conveniently drill and extrude the two sides.

The invention is further configured to: the bottom of the drilling part is provided with a water outlet hole communicated with the inside of the rod body.

Through adopting above-mentioned technical scheme, water is spout from the apopore, can make the pebble bed in the place ahead be stained with the water lubrication and make the stratum soften, and the portion of being convenient for creep into stirs the extrusion with the pebble to both sides.

The invention is further configured to: the drill teeth are arranged in a bending mode towards the drilling part, and conical sharp corners facing the drilling direction are arranged at the end parts of the drill teeth.

By adopting the technical scheme, the sharp corner part is convenient for separating pebble blocks in a pebble layer and extruding the pebble blocks to two sides, so that a soil nail hole is formed, the cambered surface at the outer side can reduce friction between the pebble blocks and the drilling teeth, and the phenomenon of drill jamming in the drilling process is avoided.

The invention is further configured to: and the two ends of the drill rod and the side wall of one end of the rod body far away from the drilling part are respectively provided with a clamping groove.

Through adopting above-mentioned technical scheme, when installation and dismantlement, can rotate drilling rod or drill bit in the centre gripping groove through the instrument centre gripping, convenient operation.

In conclusion, the beneficial technical effects of the invention are as follows:

1. The drill rod is arranged, so that the requirements of drilling depths under different geology are met, when the drill bit is arranged to drill in a pebble stratum, pebble blocks are shifted to two sides when the drilling part drills, the pebble blocks in the drilling part are extruded outwards, a guide hole with the diameter smaller than that of a soil nail hole is formed firstly, then pebbles in the guide hole are further extruded to two sides under the action of the drill teeth, the guide hole is reamed, soil nail holes are formed, the soil nail holes are formed step by step, the hole forming difficulty in the pebble stratum is reduced, the construction efficiency is high, the disturbance to the stratum is small, and the stability is good; the soil nail holes are formed in the pebble stratum in a manner of extruding the drill bit to form holes, so that the operation is simple, the construction efficiency is high, the machinery is simple, and the cost is low;

2. The drill bit can spray water in the drilling process, and water can pass through the output shaft and the drill rod and is sprayed out of the overflow hole on the rod body into the drill hole, so that the drill bit can be cooled to increase the durability of the drill bit, and the water can be reduced and sprayed into the drill hole to soften a pebble stratum, so that pebble blocks are wetted and lubricated, and the pebbles are conveniently extruded to two sides by the drill bit;

3. The drilling teeth are provided with the arc surfaces and the contraction table, and the contraction table is convenient to insert among the pebbles, so that the pebbles are extruded to two sides when rotating, and a drill bit is convenient to drill to form a drill hole; the circular arc surfaces on the two sides can reduce the friction between the drill bit and the pebbles, so that the drill bit can conveniently drill and extrude the two sides;

4. The sharp corner is arranged, so that pebble blocks in a pebble layer can be conveniently separated by the sharp corner and can be extruded towards two sides, soil nail holes are formed, the outer cambered surface can reduce friction between the pebble blocks and the drilling teeth, and the phenomenon of drill jamming in the drilling process is avoided;

5. Through set up the centre gripping groove on drilling rod and drill bit, be convenient for installation and dismantlement between them.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the construction of a highlighting drill of the present invention;

Fig. 3 is a schematic diagram of the explosive structure of the present invention.

In the figure, 1, a water drilling machine; 2. an output shaft; 21. a threaded segment; 3. a drill stem; 31. an internal thread section; 32. a screw section; 4. a drill bit; 41. a rod body; 411. an overflow hole; 42. drilling teeth; 421. a sharp corner portion; 43. a drilling section; 44. a water outlet hole; 45. drilling teeth; 451. a retraction stage; 5. a clamping groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

referring to fig. 1, the cobble stratum soil nail drilling equipment disclosed by the invention comprises a water drilling rig 1, wherein an output shaft 2 is connected to the water drilling rig 1 in a transmission mode, a drill rod 3 is connected to the output shaft 2 in a threaded mode, the drill rod 3 is in multiple sections, and each section of drill rod is 2-4m in length, so that the drill rods 3 in different lengths can be selected according to different drilling depths. The adjacent drill rods 3 are in threaded connection. And a drill bit 4 is connected to one end of the drill rod 3 far away from the water drilling machine 1 in a threaded manner.

Referring to fig. 2, the drill 4 includes a rod 41, a plurality of drill teeth 42 fixed on the circumference of the rod 41 at regular intervals, and a drilling portion 43 fixed on the end of the rod 41, wherein the number of the drill teeth 42 is at least three, the drilling portion 43 is U-shaped, and one end of the rod 41 far away from the drilling portion 43 is in threaded connection with the drill rod 3. The screwing direction of the threads in the threaded connection is the rotating direction of the drill rod 3.

The drill rod 3 is arranged on the water drilling machine 1, so that the requirement of the drilling depth is met, 6-8m soil nail drilling holes can be drilled in a pebble stratum, the drilling depth can meet the requirements of the soil nail drilling holes in different geology, and the drilling depth can be controlled according to the drilling depth of the drill rod 3; when the drill bit 4 is arranged to drill in a pebble stratum, the drilling part 43 shifts pebble blocks to two sides when drilling, so that the pebble blocks of the drilling part 43 are extruded outwards to form a guide hole with a diameter smaller than that of a soil nail hole, then pebbles in the guide hole are further extruded to two sides under the action of the drilling teeth 42, the guide hole is reamed, and thus the soil nail hole is formed, the soil nail hole is formed step by step, the hole forming difficulty in the pebble stratum is reduced, the construction efficiency is high, the stratum disturbance is small, and the stability is good; the soil nail holes are formed in the pebble stratum in a mode of extruding the drill bit 4 to form holes, the operation is simple, the construction efficiency is high, the machinery is simple, the cost is low, and the problem that drilling is difficult in the pebble stratum by adopting a traditional process is solved.

Referring to fig. 2 and 3, the drill rod 3 is a hollow steel pipe, and has high strength and low manufacturing cost. The output shaft 2 of the water drilling machine 1 is hollow and communicated with a water source, and a threaded section 21 is integrally formed at one end, far away from the water drilling machine 1, of the output shaft 2. The drill rod 3 is a hollow steel pipe, one end of the drill rod is provided with an internal thread section 3121 screwed on the thread section 21, and the other end of the drill rod is fixedly provided with a screw section 32 with the same size as the thread section 21. The internal thread section 3121 may be screwed onto the thread section 21 or the screw section 32 on adjacent drill rods 3 to connect the drill rods 3 to the water drill rig 1 or to connect adjacent drill rods 3 together. The rod body 41 is hollow and communicated with the output shaft 2 and the drill rod 3, and an overflow hole 411 is formed in the side wall of the rod body 41. During drilling, water can pass through the output shaft 2 and the drill rod 3 and is sprayed out of the overflow hole 411 on the rod body 41 into the drill hole, so that the drill bit 4 can be cooled, the durability of the drill bit 4 is improved, and the water can be sprayed into the drill hole to soften a pebble stratum, so that pebble blocks are wetted and lubricated, and the drill bit 4 can extrude pebbles to two sides conveniently.

Referring to fig. 2, a water outlet hole 44 communicated with the inside of the rod body 41 is further formed in the bottom of the drilling portion 43, water is sprayed out from the water outlet hole 44, a pebble layer in front can be wetted and lubricated, a stratum is softened, and the pebble is stirred and extruded towards two sides by the drilling portion 43 conveniently.

Referring to fig. 2, the drilling portion 43 includes two drilling teeth 45 disposed at an interval and vertically fixed at the end of the rod 41, the opposite surfaces of the two drilling teeth 45 are arc surfaces, and a contracting platform 451 is integrally formed at one end of the drilling teeth 45 away from the rod 41. The contracting table 451 is convenient to insert among the pebbles, so that the pebbles are pressed towards two sides when rotating, and the drill bit 4 is convenient to drill to form a drill hole; the circular arc surfaces on the two sides can reduce the friction between the drill bit 4 and the pebbles, so that the drill bit 4 can conveniently drill and extrude the two sides.

Referring to fig. 2, in order to facilitate forward drilling of the drill teeth 42, the drill teeth 42 are bent towards the drilling portion 43, the outer side surfaces of the drill teeth are provided with arc surfaces, the end portions of the drill teeth 42 are provided with sharp corners 421 towards the drilling direction, when drilling is performed, the sharp corners 421 facilitate separation of pebble blocks in a pebble layer and extrusion towards two sides, soil nail holes are formed, and the arc surfaces on the outer sides can reduce friction between the pebble blocks and the drill teeth 42, so that the phenomenon of drill sticking in the drilling process is avoided.

Referring back to fig. 1, as the water drilling machine 1, the drill rod 3 and the drill bit 4 are in threaded connection, in order to facilitate connection and detachment among the water drilling machine 1, the drill rod 3 and the drill bit 4, the side walls of the two ends of the drill rod 3 and the end, far away from the drilling part 43, of the rod body 41 are respectively provided with a clamping groove 5, and when the water drilling machine is installed and detached, the drill rod 3 or the drill bit 4 can be rotated in the clamping groove 5 through tool clamping, so that the operation is convenient.

The implementation principle of the embodiment is as follows: when the device is used, the drill bit 4 is directly screwed on the output shaft 2, a shallow soil nail hole is drilled at the position where the soil nail hole needs to be drilled, and then the drill bit 4 is withdrawn from the soil nail hole.

The method comprises the steps of detaching a drill bit 4 from an output shaft 2, enabling a drill rod 3 to be installed on the output shaft 2, installing the drill bit 4 on the drill rod 3, inserting the drill bit 4 into a soil nail hole which is punched in advance, starting a water drilling machine 1, connecting an external water source, drilling a pebble layer, keeping the drill rod 3 and the drill bit 4 in the soil nail hole when the drill rod 3 is drilled to the tail end, removing the connection between the drill rod 3 and the water drilling machine 1, adding the drill rod 3 between the drill rod 3 and the water drilling machine 1, and continuing drilling until drilling is completed.

After drilling is finished, the drill rod 3 and the drill bit 4 are pulled out of the soil nailing hole, the steel perforated pipe is rapidly inserted into the soil nailing hole by utilizing the self-stability of the pebble layer, and then grouting is carried out.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.