CN105986761A - Double-stand-column, large-torque and long-spiral rock-socketed drilling machine and construction method thereof - Google Patents

Abstract

A double-stand-column, large-torque and long-spiral rock-socketed drilling machine is characterized in that a chassis is erected on a walking-type or walking-crawler type traveling device; double stand columns are erected on the chassis and are fixed by double inclined struts; the chassis is further provided with an undercarriage, a control box and two to four winches; a power head is hung on a pulley set on the tops of the double stand columns; the power head is composed of four variable frequency motors of 75-110 kW, a frequency converter, a speed reducer, a driving pinion, a driven gearwheel and a hexagonal connector; the output rotating speed of the power head is 1-60 rpm, and the output torque of the power head is 20-100 tons/m; and the lower portion of the power head is connected with a long-spiral drilling rod, and the lower portion of the drilling rod is connected with a rock-socketed drilling bit. Compared with the prior art, the double-stand-column, large-torque and long-spiral rock-socketed drilling machine has obvious excellent, can output large-tonnage torque, can drive the spiral drilling rod and the hard-alloy drilling bit to move in stratums with hard rock or gravel-cobble layers of 60-120 MPa, can quickly construct high bearing capacity engineering piles, further can lower foundation engineering cost, and avoids mud contamination in construction.

Description

A kind of double embedding rock drilling machine of column high pulling torque long spire and construction method thereof

Technical field

The present invention relates to building machinery field, particularly relate to a kind of double embedding rock drilling machine of column high pulling torque long spire and construction thereof Method.

Background technology

It is known that long-spiral drilling machine is mainly used in northern China and west area, preferably native in soil mechanical properties Complete in Ceng to creep into-concrete perfusion-rear inserts steel reinforcement cage pile, has that speed of application is fast, mud-less pollution and engineering are made The advantages such as valency is relatively low.But, existing long-spiral drilling machine all uses single or double driven by motor, power of motor 45-75kw, turns round Square 3.5-8 ton rice.So, long-spiral drilling machine can only creep into soil layer or the compression strength value soft rock less than 20MPa.

At the building of China coast soft clay area, when upper soil horizon mechanical property is poor, designer can be by work Journey stake stake end embeds 1-3 times of stake footpath of the hard rock that compression strength value is 60-120MPa, to improve the bearing capacity of stake and antiskid Move.Embedding the hard rock more than 60MPa, cannot being constructed by existing long-spiral drilling machine, this type of pile foundation existing can only use Cost is high, have a percussive drill of mud contamination, or construction cost is higher, the down-hole hammer drilling machine construction that more consumes energy.

Content of the invention

The present invention provides a kind of double embedding rock drilling machine of column high pulling torque long spire, and its unit head can export large-tonnage moment of torsion, soon Speed, low cost complete a footpath 0.6-2 rice, the bored concrete pile piercing block stone gravel layer or hard rock of stake long 20-100 rice Construction.The compression strength value of hard rock described herein is 60-120MPa, mud-less pollution in construction.China's soft clay area stake End supporting course buried depth is in the majority with 50-80m, and the double pillar construction of employing can be after the drilling rod construction on earth of a column, separately Continuing construction on the drilling rod connecting of one column, it is to avoid single stand column pile machine extension bar, workman must up to pile frame top anchor tip.

The technical solution used in the present invention is: a kind of double embedding rock drilling machines of column high pulling torque long spire, it is characterised in that On walking or stride-cterpillar drive, setting up chassis, chassis being established double column, double column diclinics support Adjustable fixing, chassis is additionally provided with undercarriage, control cabinet and 2-4 platform hoist engine；Double column tops top sheave group hangs power Head, unit head is by 4 75-110 kilowatt of variable-frequency motors, frequency converter, reductor, driver pinion, driven gear wheel With hexagonal jointing composition；Power head device output speed is 1-60 rev/min, and output moment of torsion is 20-100 ton rice； Connect long screw drill rod under unit head, under drilling rod, connect embedding rock drill bit.Stride-cterpillar drive described herein is to protect Staying the long stride of walking, being replaced short stride by crawler unit, the action of purer walking is rapider.Compared with crawler belt Formula device, because contact area increases, pile frame construction is safer stable.

The construction method of the embedding rock drilling machine of a kind of pair of column high pulling torque long spire, comprises the following steps:

1. each for rig of the present invention parts are transported to job site to assemble；

2. by running gear mobile drill to stake position；

3. starting frequency converter and 2 motors, frequency converter leaves to 50HZ, and the rotating speed of motor is 960 revs/min, passes through Reductor, the little moment of torsion height rotating speed of unit head output, drive long screw drill rod and drill bit, creep in soil layer；

4., when drill bit gravel layer to be entered, gradually turn down frequency converter to 40-30HZ, the rotating speed of motor from 50HZ Also being gradually reduced, through reductor, unit head output moment of torsion increases, and drives long screw drill rod and drill bit, to boulder and cobble Layer creeps into；

5., when entering the hard rock of 60-120MPa, increase and start another 2 motors, then turn down frequency converter HZ, make rotating speed Being down to 2-4 rev/min, unit head output moment of torsion reaches 60-100 ton rice, it is ensured that drill bit creeps into hard rock until projected depth；

6. high slump concrete is pumped, from pump truck through conveying pipe, then through drilling rod center cavity, finally, from drill bit valve Door injects stake holes, bores the high slump concrete irrigating in stake holes to ground with carrying；

7. after auger stem and carbide drill lift-off stake holes, stake machine moves next position and goes round and begins again, and continues the 3. To 6. step construction；

8. hang steel reinforcement cage and be inserted into setting absolute altitude from the vibration of concrete center vibration hammer, i.e. complete this engineering long spire embedding Rock filling pile is constructed.

A kind of double embedding rock drilling machine of column high pulling torque long spire compared with prior art, has obvious superiority, can export big The moment of torsion of tonnage, drives auger stem and carbide drill on the stratum of 60-120MPa ragstone or gravel layer In, high-bearing capacity engineering pile of comparatively fast constructing out, also reduces mud-less pollution in foundation engineering cost and construction.

Brief description

Fig. 1 is embodiment of the present invention generalized section, and a. side elevational cross-section schematic diagram, b. faces generalized section.

Drawing illustrates: 1 top pulleys group, 2 columns, 3 unit head lifting wire ropes, 4 open frame steel wire rope, and 5 is oblique Support, 6 undercarriages, 7 hoist engines, 8 switch boards, 9 chassis, 10 long stride oil cylinders, 11 long strides, 12 short stride oil Cylinder, 13 short strides, 14 assembly pulleys, 15 embedding rock drill bits, 16 locators, 17 auger stems, 18 unit heads.

Detailed description of the invention

The invention will be further described below in conjunction with the accompanying drawings: the structure of the embedding rock drilling machine of a kind of pair of column high pulling torque long spire Composition and construction procedure are very clearly for those skilled in the art, comprise the following steps:

1. each for rig of the present invention parts are transported to job site to assemble, at field boundary on the ground, be first well placed the long stride of two pieces (11) Short stride (13) with two pieces, installation chassis (9) on it, install on chassis (9) double column (2), undercarriage (6), Diagonal brace (5), hoist engine (7), switch board (8), and column (2) is erected, by top pulleys group (1) With assembly pulley (14) and hoist engine (7), unit head (18), long screw drill rod (17) and drill bit (15) are hung over column (2) On；

2. walked by long stride (11) and short stride (13), on mobile drill to stake position；

3. starting frequency converter and 2 motors, frequency converter leaves to 50HZ, and the rotating speed of motor is 960 revs/min, through over subtraction Speed machine, unit head (18) exports little moment of torsion height rotating speed, drives long screw drill rod (17) and drill bit (15), creeps into soil layer；

4. when drill bit (15) gravel layer to be entered, gradually turning down frequency converter from 50HZ, the rotating speed of motor is also gradually Reducing, through reductor, unit head output moment of torsion increases, and drives long screw drill rod and drill bit, creeps into gravel layer；

5., when entering the hard rock of 60-120MPa, increase and start another 2 motors and turn down frequency converter, make rotating speed be down to 2-4 rev/min, the output of unit head moment of torsion reaches 60-100 ton rice, it is ensured that drill bit creeps into hard rock until projected depth；

6. pump high slump concrete and enter stake holes from drilling rod center cavity and by drill bit valve, bore to stake holes with carrying Irrigate high slump concrete to ground；

7. after auger stem and carbide drill lift-off stake holes, stake machine moves next position and goes round and begins again, and continues the 3. To 6. step construction；

8. hang steel reinforcement cage and be inserted into setting absolute altitude from the vibration of concrete center vibration hammer, i.e. complete this engineering long spire embedding Rock filling pile is constructed.

Claims (2)

1. double embedding rock drilling machine of column high pulling torque long spire, it is characterised in that on walking or stride-cterpillar drive, set up chassis, establishing double column on chassis, it is fixing that the support of double column diclinics is adjustable, and chassis is additionally provided with undercarriage, control cabinet and 2-4 platform hoist engine；Double column tops top sheave group hangs unit head, and unit head is made up of 4 75-110 kilowatt of variable-frequency motors, frequency converter, reductor, driver pinion, driven gear wheel and hexagonal jointing；Power head device output speed is 1-60 rev/min, and output moment of torsion is 20-100 ton rice；Connect long screw drill rod under unit head, under drilling rod, connect embedding rock drill bit.

2. a construction method for double embedding rock drilling machines of column high pulling torque long spire, comprises the following steps:

1. each for rig of the present invention parts are transported to job site to assemble；

2. by running gear mobile drill to stake position；

3. starting frequency converter and 2 motors, frequency converter leaves to 50HZ, and the rotating speed of motor is 960 revs/min, through reductor, the little moment of torsion height rotating speed of unit head output, drives long screw drill rod and drill bit, creeps in soil layer；

4. when drill bit gravel layer to be entered, gradually turning down frequency converter from 50HZ to 40-30HZ, the rotating speed of motor is also gradually reduced, and through reductor, unit head output moment of torsion increases, and drives long screw drill rod and drill bit, creeps into gravel layer；

5. when entering the hard rock of 60-120MPa, increasing and starting another 2 motors, then turn down frequency converter HZ, make rotating speed be down to 2-4 rev/min, unit head output moment of torsion reaches 60-100 ton rice, it is ensured that drill bit creeps into hard rock until projected depth；

6. pump high slump concrete, from pump truck through conveying pipe, then through drilling rod center cavity, finally, inject stake holes from drill bit valve, bore the high slump concrete irrigating in stake holes to ground with carrying；

7. after auger stem and carbide drill lift-off stake holes, stake machine moves next position and goes round and begins again, and continues the 3. to 6. step construction；

8. hang steel reinforcement cage and be inserted into setting absolute altitude from the vibration of concrete center vibration hammer, i.e. complete the construction of this engineering long spire piles set into rock.