CN113090192B - Complex stratum rotary drilling steel sleeve matched hole forming method - Google Patents
Complex stratum rotary drilling steel sleeve matched hole forming method Download PDFInfo
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- CN113090192B CN113090192B CN202110454960.5A CN202110454960A CN113090192B CN 113090192 B CN113090192 B CN 113090192B CN 202110454960 A CN202110454960 A CN 202110454960A CN 113090192 B CN113090192 B CN 113090192B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 444
- 239000010959 steel Substances 0.000 title claims abstract description 444
- 238000005553 drilling Methods 0.000 title claims abstract description 145
- 238000000034 method Methods 0.000 title claims abstract description 77
- 238000010276 construction Methods 0.000 claims abstract description 41
- 238000013461 design Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims description 57
- 239000000835 fiber Substances 0.000 claims description 24
- 239000011435 rock Substances 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 18
- 239000004927 clay Substances 0.000 claims description 13
- 239000000440 bentonite Substances 0.000 claims description 12
- 229910000278 bentonite Inorganic materials 0.000 claims description 12
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 12
- 239000001913 cellulose Substances 0.000 claims description 12
- 229920002678 cellulose Polymers 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 11
- 230000036346 tooth eruption Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910001868 water Inorganic materials 0.000 claims description 8
- 239000004575 stone Substances 0.000 claims description 7
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 4
- 230000001174 ascending effect Effects 0.000 claims description 3
- 229910052570 clay Inorganic materials 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000009918 complex formation Effects 0.000 claims 6
- 238000010586 diagram Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000019994 cava Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B27/00—Containers for collecting or depositing substances in boreholes or wells, e.g. bailers, baskets or buckets for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/003—Drilling with mechanical conveying means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses a complex stratum rotary drilling steel sleeve matched hole forming method, which comprises the following steps: firstly, leveling a construction site and measuring and placing a pile position; secondly, manufacturing a hoisting frame; thirdly, drilling the rotary drilling rig on the upper stratum and lowering the steel sleeve in the following way; and fourthly, drilling the rotary drilling rig in the karst stratum at the lower part and then descending the steel sleeve. The method has simple steps and reasonable design, can realize the construction of the rotary drilling rig and the follow-up lowering of the steel sleeve by arranging the sleeve lowering power piece on the rotary drilling rig, effectively adapts to the hole forming of the drilling pile in the complex stratum, prevents hole collapse, and has the advantages of small required construction equipment, high equipment utilization rate, high hole forming speed, high construction efficiency and low cost.
Description
Technical Field
The invention belongs to the technical field of bored pile hole forming, and particularly relates to a hole forming method for complex stratum rotary drilling and steel sleeve matching.
Background
At present, the upper part of a complex stratum is a water-rich stratum, the lower part of the complex stratum is a karst stratum, the construction of a karst stratum drilled pile is mainly based on impact drilling construction, and a karst cave adopts main treatment measures such as backfilling rubbles, clay and concrete or grouting. In addition, if casing follow-up is adopted, hole collapse can be prevented, but at present, the casing is lowered and all is hoisted by adopting a crawler crane, and a jacketing machine is lowered, so that not only are a plurality of construction equipment and a plurality of procedures required, but also the efficiency is low, and is not economical.
Therefore, the complex stratum rotary drilling steel sleeve matched pore-forming method is lacked, the power part is transferred through the sleeve arranged on the rotary drilling rig, the construction of the rotary drilling rig can be realized, the follow-up transfer of the steel sleeve can be realized through the power part transferred through the sleeve, the hole forming of the bored pile in the complex stratum is effectively adapted, the required construction equipment is small, the equipment utilization rate is high, the pore-forming speed is high, the construction efficiency is high, and the cost is low.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a hole forming method for complex stratum rotary drilling and steel sleeve matching, the method has simple steps and reasonable design, the construction of the rotary drilling can be realized by arranging a sleeve downward-placing power piece on the rotary drilling rig, the follow-up downward placing of the steel sleeve can also be realized by arranging the sleeve downward-placing power piece on the rotary drilling rig, the hole forming method is effectively suitable for the hole forming of the bored pile in the complex stratum, the required construction equipment is small, the equipment utilization rate is high, the hole forming speed is high, the construction efficiency is high, and the cost is low.
In order to solve the technical problems, the invention adopts the technical scheme that: a hole forming method for matching a steel sleeve in rotary drilling of a complex stratum is characterized by comprising the following steps:
leveling a construction site and measuring and placing a pile position:
101, clearing and leveling obstacles in a region to be constructed so as to keep the ground surface of the region to be constructed at the same elevation; the region to be constructed comprises an upper stratum and a lower karst stratum from top to bottom;
102, measuring and placing pile positions in a ground surface area of a region to be constructed according to a construction design drawing;
step two, manufacturing a hoisting frame:
manufacturing a hoisting frame;
step three, drilling of the rotary drilling rig for the upper stratum and follow-up lowering of the steel sleeve:
301, installing a sleeve pipe at the bottom of a power head in the rotary drilling rig and lowering a power part; wherein, the casing lowering power part is of a hollow structure; the sliding frame in the rotary drilling rig is connected with the power head;
step 302, drilling of a drilling machine and construction of a first section of steel sleeve, wherein the concrete process is as follows:
step 3021, a rotary excavating bucket is installed at the bottom of a power part, which is placed downwards by a drill rod in the rotary drilling rig through a power head and a sleeve, a sliding frame on the rotary drilling rig is operated to vertically descend along a mast, meanwhile, the power head rotates to drive the drill rod to rotate, so that the drill rod descends while rotating to drive the rotary excavating bucket to carry out rotary excavating at the pile position for the section 1, and a section 1 drilling hole is formed; the depth of the 1 st section of drilling hole is smaller than the length of the first section of steel sleeve;
step 3022, hoisting the first section of steel sleeve by the rotary drilling rig through the hoisting frame, and lowering the first section of steel sleeve into the section 1 of the drill hole;
step 3023, connecting the top end of the first section of steel sleeve with a sleeve lowering power part, and coaxially arranging the first section of steel sleeve, the drill rod and the section 1 drill hole;
step 3024, operating the sliding frame to vertically descend along the mast, driving the rotary excavating bucket to rotate by the sliding frame and the vertical power head to rotate through the drill rod, and simultaneously driving the first section of steel sleeve to vertically descend along the section 1 drilling rotary cutting by the sliding frame and the vertical power head to rotate through the sleeve descending power part until the height from the top of the first section of steel sleeve to the ground surface of the area to be constructed where the pile position is located is 30-50 cm, and completing the installation of the first section of steel sleeve;
step 3025, removing the connection between the first section of steel sleeve and the casing lowering power part;
step 3026, operating the sliding frame on the rotary drilling rig to vertically ascend along the mast, and driving the rotary drilling bucket to move upwards by the power head through the drill rod until the rotary drilling bucket lifts the first section of steel sleeve for dumping soil;
step 303, drilling of the digging and drilling machine and construction of the ith section of steel sleeve, wherein the concrete process is as follows:
3031, operating the sliding frame to vertically descend along the mast, and simultaneously rotating the power head to drive the drill rod to rotate so that the drill rod descends while rotating to drive the rotary excavating bucket to perform the ith section of rotary excavation at the pile position to form the ith section of drilled hole; the depth of the ith section of drilling hole is smaller than the length of the ith section of steel sleeve;
3032, hoisting the ith section of steel sleeve by the rotary drilling rig through the hoisting frame, lowering the ith section of steel sleeve to the top of the (i-1) section of steel sleeve, and connecting the bottom of the ith section of steel sleeve with the top of the (i-1) section of steel sleeve; wherein i is a positive integer, and i is more than or equal to 2;
3033, connecting the top end of the ith section of steel sleeve with a sleeve lowering power part, and coaxially arranging the ith section of steel sleeve, a drill rod and the ith section of drill hole;
3034, operating the sliding frame to vertically descend along the mast, vertically descending the sliding frame and rotating the vertical power head to drive the rotary digging bucket to rotate in a rotary mode through the drill rod, simultaneously vertically descending the sliding frame and rotating the vertical power head to drive the ith section of steel sleeve to rotate and cut along the ith section of drilled hole to be vertically lowered through the sleeve lowering power part until the height from the top of the ith section of steel sleeve to the ground surface of the area to be constructed where the pile position is located is 30-50 cm, and completing the follow-up lowering of the ith section of steel sleeve;
3035, dismantling the connection between the ith section of steel sleeve and the casing lowering power part;
3036, operating the sliding frame on the rotary drilling rig to vertically ascend along the mast, and driving the rotary drilling bucket to move upwards by the power head through the drill rod until the rotary drilling bucket lifts the ith section of steel sleeve for dumping soil;
3037, recording the steel sleeves from the first section to the ith section as installed steel sleeves, and injecting wall protection slurry into the installed steel sleeves until the liquid level of the wall protection slurry is flush with the ground surface of the area to be constructed;
step 304, repeating step 303 for multiple times, and carrying out follow-up lowering of the next section of steel sleeve;
step four, drilling of the rotary drilling machine in the karst stratum at the lower part and following-up lowering of a steel sleeve:
step 401, when the wall protection slurry in the installed steel sleeve runs off, the liquid level of the wall protection slurry is lowered, and the wall protection slurry enters a first layer of karst cave in a karst stratum; the karst stratum is divided into a first karst cave, a first rock stratum, a second karst cave and a second rock stratum from top to bottom in sequence, wherein the jth karst cave and the jth rock stratum are arranged in sequence; wherein j is a positive integer;
402, when the liquid level of the wall protection slurry in the installed steel sleeve descends, if the sleeve lowering power piece is connected with the steel sleeve, disconnecting the current steel sleeve from the sleeve lowering power piece, and executing 403; if the casing lowering power member is not connected with the steel casing, executing step 403;
step 403, operating the sliding frame to vertically ascend along the mast, and driving the rotary bucket to move upwards by the power head through the drill rod until the rotary bucket lifts out the installed steel sleeve;
step 404, after the wall protection slurry in the installed steel sleeve runs off, injecting backfill soil through the installed steel sleeve until the fiber maintenance wall slurry is injected into the installed steel sleeve, wherein the fiber wall protection slurry does not run off;
step 405, operating the upper sliding frame of the rotary drilling rig to vertically descend along the mast, and driving the rotary drilling bucket to move downwards by the power head through the drill rod until the rotary drilling bucket extends into the installed steel sleeve;
step 406, operating the current steel sleeve to rotate, cut and vertically lower the steel sleeve according to the method in the step 303 until the height from the top of the current steel sleeve to the ground surface of the area to be constructed where the pile is located is 30-50 cm, and completing the following lowering of the current steel sleeve;
step 407, in the process of the following lowering of the next section of steel casing, when the liquid level of the wall protection slurry in the installed steel casing is lowered, the following lowering of the next section of steel casing is completed according to the method from the step 402 to the step 406; otherwise, completing the following lowering of the next section of the steel sleeve according to the method in the step 303; injecting fiber wall-protecting slurry into the installed steel sleeve until the liquid level of the fiber wall-protecting slurry is flush with the ground surface of the area to be constructed;
step 408, repeating step 407 for multiple times until the bottom of the installed steel casing passes through the first layer of karst cave and extends into the first rock stratum;
409, in the process that the bottom of the installed steel sleeve penetrates through the first layer of karst cave and extends into the first rock stratum, and when the bottom of the installed steel sleeve cannot be cut in a rotating and vertical mode, executing the steps 40A to 40C; otherwise, go to step 40D;
step 40A, disconnecting the current steel sleeve and the casing lowering power piece; then operating the sliding frame to vertically descend along the mast, vertically descending the sliding frame and rotating the vertical power head to drive the rotary drilling bucket to perform rotary drilling through the drill rod, and when the wall protection slurry in the installed steel sleeve runs off, the liquid level of the wall protection slurry descends, which indicates that the wall protection slurry enters a second layer karst cave;
step 40B, after the fiber wall protection slurry in the installed steel sleeve runs off, firstly backfilling broken stones through the installed steel sleeve, then extending into the bottom of the installed steel sleeve through a guide pipe, and pouring C20 concrete until the fiber wall protection slurry is injected into the installed steel sleeve, wherein the fiber wall protection slurry does not run off;
step 40C, repeating the method from the step 405 to the step 408 until the bottom of the installed steel sleeve extends into a second stratum through a second layer karst cave;
step 40D, repeating the method from the step 406 to the step 407 until the bottom of the installed steel casing pipe passes through the second karst cave and extends into a second rock stratum;
and step 40E, according to the method in the steps 409 to 40D, enabling the bottom of the installed steel sleeve to penetrate through the jth karst cave and extend into the jth rock stratum until the depth of the steel sleeve matched with the hole forming meets the hole forming design depth of the bored pile, and finishing the construction of the hole forming of the bored pile.
The complex stratum rotary drilling steel sleeve matched hole forming method is characterized by comprising the following steps: in the step 302, an upper connecting part is arranged at the top of a first section of steel sleeve, a plurality of cutting teeth uniformly distributed along the circumferential side wall are arranged at the bottom of the first section of steel sleeve, and the cross sections of the cutting teeth are gradually reduced from top to bottom;
in the step 303, an upper connecting part is arranged at the top of the ith section of steel sleeve, a lower connecting part is arranged at the bottom of the ith section of steel sleeve, an upper connecting hole and an upper positioning clamping groove are arranged on the upper connecting part, a lower connecting hole and a lower positioning lug are arranged on the lower connecting part, the outer diameter of the lower connecting part is smaller than that of the ith section of steel sleeve, and the inner diameter of the lower connecting part is the same as that of the ith section of steel sleeve, so that an outer step part is formed at the connecting position of the lower connecting part and the bottom of the ith section of steel sleeve; the outer diameter of the upper connecting portion is the same as that of the ith section of steel sleeve, and the inner diameter of the upper connecting portion is larger than that of the ith section of steel sleeve, so that an inner step portion is formed at the connecting position of the top of the upper connecting portion and the top of the ith section of steel sleeve.
The complex stratum rotary drilling steel sleeve matched hole forming method is characterized by comprising the following steps: in the step 3032, the bottom of the ith section of steel sleeve is connected with the top of the (i-1) th section of steel sleeve, and the specific process is as follows:
step A01, operating the ith section of steel sleeve to be lowered to the top of the (i-1) th section of steel sleeve until the ith section of steel sleeve extends into the (i-1) th section of steel sleeve in place; the outer side wall of the lower connecting part in the ith section of steel sleeve is attached to the inner side wall of the upper connecting part of the ith-1 section of steel sleeve, and the lower positioning lug is clamped in the upper positioning clamping groove;
step A02, penetrating connecting nuts into each lower connecting hole of the ith steel sleeve and each upper connecting hole of the (i-1) th steel sleeve, and penetrating connecting bolts into the connecting nuts; the connecting bolt comprises a connecting bolt body, a connecting bolt and a tool, wherein the extending end of the connecting bolt body is not protruded from the inner side walls of the ith steel sleeve section and the first steel sleeve section, the outer end of the connecting bolt body is provided with a tool mounting hole, and the connection of the bottom of the ith steel sleeve section and the top of the (i-1) th steel sleeve section is completed.
The complex stratum rotary drilling steel sleeve matched hole forming method is characterized by comprising the following steps: the hoisting frame in the step two comprises two parallel hoisting frame cross beams and two parallel first longitudinal beams which are arranged on the hoisting frame cross beams, and the length between the two first longitudinal beams is matched with the length between the two lifting lugs; the end part of any first longitudinal beam and the end part of the hanging bracket cross beam are arranged in a cross manner, so that the joint of the end part of the first longitudinal beam and the end part of the hanging bracket cross beam is marked as a hanging point, two second longitudinal beams which are arranged in parallel are arranged between the two hanging bracket cross beams, the distance between the two second longitudinal beams is smaller than that between the two first longitudinal beams, and two hanging holes are arranged on any second longitudinal beam.
The complex stratum rotary drilling steel sleeve matched hole forming method is characterized by comprising the following steps: the method for hoisting the first section of steel sleeve by the rotary drilling rig through the hoisting frame in the step 3022 is the same as the method for hoisting the ith section of steel sleeve by the rotary drilling rig through the hoisting frame in the step 3032, and the method comprises the following specific steps:
step I, operating a sliding frame on the rotary drilling rig to vertically ascend along a mast, and simultaneously driving a rotary drilling bucket to upwards move by a power head through a drill rod until the rotary drilling bucket lifts out an installed steel sleeve; operating a sliding frame on the rotary drilling rig to deviate from the installed steel sleeve;
step II, respectively penetrating first steel wire ropes into lifting holes of two lifting lugs symmetrically distributed on the outer side wall of the sliding frame, respectively penetrating two ends of the two first steel wire ropes through lifting points, and fixing the two ends of the two first steel wire ropes by using steel wire rope clamps; wherein, the hoisting frame is arranged in a horizontal state;
step III, enabling one end of a second steel wire rope to penetrate through the hoisting hole and be fixedly connected with an upper steel wire rope clamp, and enabling the other end of the second steel wire rope to penetrate through an upper connecting hole in the first section of steel sleeve or the ith section of steel sleeve and be fixedly connected with a lower steel wire rope clamp;
IV, operating a sliding frame in the rotary drilling rig to vertically ascend along the mast, and vertically ascending the sliding frame to drive a first section of steel sleeve or an ith section of steel sleeve to be hoisted through a first steel wire rope and a second steel wire rope until the bottom of the first section of steel sleeve or the ith section of steel sleeve is flush with the top of the installed steel sleeve;
step V, operating the sliding frame in the rotary drilling rig to move until a first section of steel sleeve lifted by a second steel wire rope is superposed with the central line of the section 1 drill hole or the central line of the section i steel sleeve is superposed with the central line of the installed steel sleeve;
and VI, operating the sliding frame in the rotary drilling rig to vertically descend along the mast, and vertically descending the sliding frame to drive the first section of steel sleeve or the ith section of steel sleeve to vertically descend through the first steel wire rope and the second steel wire rope until the first section of steel sleeve is placed in the 1 st section of drill hole or the ith section of steel sleeve extends into the ith-1 steel sleeve to be in place.
The complex stratum rotary drilling steel sleeve matched hole forming method is characterized by comprising the following steps: in the third step, the casing lowering power part comprises a first section of cylinder, a second section of cylinder, a third section of cylinder, a fourth section of cylinder and a fifth section of cylinder which are molded at one time from bottom to top, the outer diameter of the first section of cylinder is the same as that of the third section of cylinder, the outer diameter of the second section of cylinder is larger than that of the first section of cylinder, the outer diameter of the fourth section of cylinder is gradually reduced from bottom to top, the outer diameter of the fifth section of cylinder is the same as the minimum outer diameter of the fourth section of cylinder, the fifth section of cylinder extends into the bottom of the power head, the bottom of the fifth section of cylinder is connected with the bottom of the power head through a bolt, and a through hole is formed in the third section of cylinder;
the method for connecting the top end of the first section of steel sleeve with the sleeve lowering power part in the step 3023 and the method for connecting the top end of the ith section of steel sleeve with the sleeve lowering power part in the step 3033 are the same, and the specific processes are as follows:
step B01, arranging bottom connecting holes on the first section of cylinder;
b02, penetrating connecting nuts into the bottom connecting holes and the upper connecting hole in the first section of steel sleeve or the ith section of steel sleeve, and penetrating connecting bolts into the connecting nuts; wherein, the end that stretches into of connecting bolt is not protruding in the inside wall of first section of thick bamboo, connecting bolt's outer end is provided with the instrument mounting hole, accomplishes the connection of first section of thick bamboo and first section of steel casing pipe or ith section of steel casing pipe.
The complex stratum rotary drilling steel sleeve matched hole forming method is characterized by comprising the following steps: the backfill in step 404 is comprised of clay, bentonite, and cellulose, and the clay: bentonite: the cellulose accounts for 70-85% by weight: (10-20%): (5-10%);
the fiber wall-protecting slurry is composed of water, bentonite, clay, caustic soda and cellulose, and the weight ratio of water to bentonite is as follows: clay: caustic soda: the mass ratio of the cellulose is 1000: (100-120): (10-30): (2.5-4): 0.6;
in the step 40B, the particle size of the crushed stone is less than 25 mm.
Compared with the prior art, the invention has the following advantages:
1. the construction method for forming the hole of the bored pile by rotary drilling in the complex stratum has the advantages of simple steps, convenience in realization and simplicity and convenience in operation, and ensures good hole forming quality of the bored pile.
2. The construction method for drilling the hole of the complicated stratum rotary drilling bored pile is simple and convenient to operate and good in using effect, firstly, a construction site and a pile position are leveled, secondly, a hoisting frame is manufactured, then drilling of the rotary drilling machine for the upper stratum, follow-up lowering of the steel sleeve and drilling of the rotary drilling machine for the lower karst stratum and follow-up lowering of the steel sleeve are carried out, the problems of repeated hole collapse and low drilling speed of the karst stratum can be solved, and the construction method is suitable for drilling the complicated karst stratum hundred-meter overlong bored pile.
3. The hoisting frame is connected with the hoisting frame through the first steel wire rope and then connected with the first steel sleeve or the ith steel sleeve through the second steel wire rope, so that the hoisting of the first steel sleeve and the ith steel sleeve is realized, and the touching damage of a casing lowering power part in the hoisting process of the first steel sleeve or the ith steel sleeve is avoided.
4. According to the sleeve lowering power piece, the sleeve lowering power piece is connected with the bottom of the power head through the sleeve lowering power piece, so that the power of the power head is transmitted to the sleeve lowering power piece, the sleeve lowering power piece rotates to drive the first section of steel sleeve and the ith section of steel sleeve to rotate, cut and vertically lower, and the steel sleeve is lowered in a follow-up mode.
5. According to the invention, the cutting teeth are arranged at the bottom of the first section of steel sleeve, the upper connecting part is arranged at the top of the ith section of steel sleeve, and the lower connecting part is arranged at the bottom of the ith section of steel sleeve, so that the lower part of the integral sleeve can be conveniently and rotatably cut through the cutting teeth, and the connection of two adjacent steel sleeves can be conveniently realized through the arrangement of the upper connecting part and the lower connecting part.
6. When the steel casing in the karst stratum at the lower part of the invention is lowered through a plurality of karst caves and terraces along with advancing, the steel casing can be vertically lowered according to the condition that the steel casing can not rotate to cut, thus the holes of a plurality of karst caves are plugged by backfill soil or broken stones and C20 concrete, the construction is convenient according to the actual condition, and the construction quality is improved.
In conclusion, the method has simple steps and reasonable design, can realize the construction of the rotary drilling rig and the follow-up lowering of the steel sleeve by arranging the sleeve lowering power part on the rotary drilling rig, effectively adapts to the hole forming of the bored pile in the complex stratum, and has the advantages of small required construction equipment, high equipment utilization rate, high hole forming speed, high construction efficiency and low cost.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic view of the construction structure of the present invention.
FIG. 2 is a schematic diagram of the hoisting frame and the first section of steel casing pipe.
FIG. 3 is a schematic structural view of a first section of steel casing according to the present invention.
FIG. 4 is a schematic structural diagram of the ith section of steel casing according to the present invention.
FIG. 5 is a schematic view of the connection of two adjacent lengths of steel casing according to the present invention.
Fig. 6 is a schematic structural view of the hoisting frame of the present invention.
FIG. 7 is a block flow diagram of the present invention.
Description of reference numerals:
1-a first section of steel casing; 1-1-upper connecting part; 1-1-1-upper connecting hole;
1-1-2-positioning clamping grooves; 1-2-lower connecting portion; 1-2-1-lower connecting hole;
1-2-2-lower positioning bumps; 2-a rotary excavator bucket; 3-hoisting frame;
3-1-hanger beam; 3-2-a first stringer; 3-3-a second stringer;
3-4-hoisting holes; 4-casing the lowering power part; 4-1-first stage cartridge;
4-1-1-bottom connection hole; 4-2-a second stage drum; 4-3-a third stage drum;
4-3-1-via; 4-4-a fourth section of drum; 4-5-a fifth section of drum;
5-1-lifting lug; 5-2-lifting a hole; 5-3-a first wire rope;
5-4-steel wire rope clamping; 6-1-a second wire rope; 6-2-lower steel wire rope clamp;
6-3-installing a steel wire rope clamp; 7-a power head; 8-sliding frame;
9-a mast; 10-a drill rod; 11-
Detailed Description
The method for forming the hole by matching the rotary drilling and steel sleeve in the complex stratum as shown in the figures 1 to 7 comprises the following steps:
leveling a construction site and measuring and placing a pile position:
step 101, clearing and leveling obstacles in a region to be constructed so as to keep the ground surface of the region to be constructed at the same elevation; the region to be constructed comprises an upper stratum and a lower karst stratum from top to bottom;
102, measuring and placing pile positions in a ground surface area of a region to be constructed according to a construction design drawing;
step two, manufacturing a hoisting frame:
manufacturing a hoisting frame 3;
step three, drilling of the rotary drilling rig for the upper stratum and follow-up lowering of the steel sleeve:
301, installing a sleeve pipe at the bottom of a power head 7 in the rotary drilling rig and lowering a power part 4; wherein, the casing lowering power part 4 is a hollow structure; wherein, a sliding frame 8 in the rotary drilling rig is connected with a power head 7;
step 302, drilling of the drilling machine and construction of the first section of steel sleeve 1, wherein the concrete process is as follows:
step 3021, in the rotary drilling rig, a rotary excavating bucket 2 is installed at the bottom of a drill rod 10 penetrating through a power head 7 and a sleeve pipe downward-placing power part 4, a sliding frame 8 on the rotary drilling rig is operated to vertically descend along a mast 9, meanwhile, the power head 7 rotates to drive the drill rod 10 to rotate, so that the drill rod 10 descends while rotating to drive the rotary excavating bucket 2 to carry out rotary excavating at the pile position for section 1, and a section 1 drilling hole is formed; wherein the depth of the 1 st section of drilling is less than the length of the first section of steel sleeve 1;
step 3022, hoisting the first section of steel sleeve 1 by the rotary drilling rig through the hoisting frame 3, and lowering the first section of steel sleeve 1 into the section 1 of the drill hole;
step 3023, connecting the top end of the first section of steel casing 1 with the casing lowering power part 4, and coaxially arranging the first section of steel casing 1, the drill rod 10 and the section 1 of drill hole;
step 3024, operating the sliding frame 8 to vertically descend along the mast 9, vertically descending the sliding frame 8 and rotating the vertical power head 7 to drive the rotary excavating bucket 2 to rotatably dig through the drill rod 10, and simultaneously vertically descending the sliding frame 8 and rotating the vertical power head 7 to drive the first steel sleeve 1 to vertically descend along the 1 st section of drilled hole by the power piece 4 through lowering the sleeve until the height from the top of the first steel sleeve 1 to the ground surface of the area to be constructed where the pile is located is 30-50 cm, so that the first steel sleeve 1 is installed;
step 3025, dismantling the connection between the first section of steel sleeve 1 and the casing lowering power part 4;
step 3026, operating the sliding frame 8 on the rotary drilling rig to vertically ascend along the mast 9, and driving the rotary excavating bucket 2 to move upwards by the power head 7 through the drill rod 10 until the rotary excavating bucket 2 lifts the first section of steel sleeve 1 for dumping soil;
step 303, drilling of the digging and drilling machine and construction of the ith section of steel sleeve, wherein the concrete process is as follows:
step 3031, operating the sliding frame 8 to vertically descend along the mast 9, and simultaneously rotating the power head 7 to drive the drill rod 10 to rotate, so that the drill rod 10 descends while rotating to drive the rotary excavating bucket 2 to carry out the ith section of rotary excavation at the pile position, and forming an ith section of drilling hole; the depth of the ith section of drilling hole is smaller than the length of the ith section of steel sleeve;
3032, hoisting the ith section of steel sleeve by the rotary drilling rig through the hoisting frame 3, lowering the ith section of steel sleeve to the top of the ith-1 section of steel sleeve, and connecting the bottom of the ith section of steel sleeve with the top of the ith-1 section of steel sleeve; wherein i is a positive integer, and i is more than or equal to 2;
3033, connecting the top end of the ith section of steel sleeve with a sleeve lowering power part 4, and coaxially arranging the ith section of steel sleeve, the drill rod 10 and the ith section of drill hole;
3034, operating the sliding frame 8 to vertically descend along the mast 9, vertically descending the sliding frame 8 and rotating the vertical power head 7 to drive the rotary excavating bucket 2 to rotatably dig through the drill rod 10, simultaneously vertically descending the sliding frame 8 and rotating the vertical power head 7 to drive the ith section of steel sleeve to rotate and cut vertically along the ith section of drilled hole through the sleeve pipe descending power part 4 until the height from the top of the ith section of steel sleeve to the ground surface of the area to be constructed where the pile position is located is 30 cm-50 cm, and completing the follow-up descending of the ith section of steel sleeve;
3035, dismantling the connection between the ith section of steel sleeve and the sleeve lowering power part 4;
3036, operating the sliding frame 8 on the rotary drilling rig to vertically ascend along the mast 9, and driving the rotary excavating bucket 2 to move upwards by the power head 7 through the drill rod 10 until the rotary excavating bucket 2 lifts the ith section of steel sleeve 1 for dumping soil;
3037, recording the first section of steel sleeve 1 to the ith section of steel sleeve as an installed steel sleeve, and injecting wall protection slurry into the installed steel sleeve until the liquid level of the wall protection slurry is flush with the ground surface of the area to be constructed;
step 304, repeating step 303 for multiple times, and carrying out follow-up lowering of the next section of steel sleeve;
step four, drilling of the rotary drilling machine in the karst stratum at the lower part and following-up lowering of a steel sleeve:
step 401, when the wall protection slurry in the installed steel sleeve runs off, the liquid level of the wall protection slurry is lowered, and the wall protection slurry enters a first layer of karst cave in a karst stratum; the karst stratum is divided into a first karst cave, a first rock stratum, a second karst cave and a second rock stratum from top to bottom in sequence, wherein the jth karst cave and the jth rock stratum are arranged in sequence; wherein j is a positive integer;
step 402, when the liquid level of the wall protection slurry in the installed steel sleeve descends, if the sleeve lowering power part 4 is connected with the steel sleeve, disconnecting the current steel sleeve from the sleeve lowering power part 4, and executing step 403; if the casing lowering power member 4 is not connected with a steel casing, executing step 403;
step 403, operating the sliding frame 8 to vertically ascend along the mast 9, and simultaneously driving the rotary excavating bucket 2 to move upwards by the power head 7 through the drill rod 10 until the rotary excavating bucket 2 lifts out the installed steel sleeve;
step 404, after the wall protection slurry in the installed steel sleeve runs off, injecting backfill soil through the installed steel sleeve until the fiber maintenance wall slurry is injected into the installed steel sleeve, wherein the fiber wall protection slurry does not run off;
step 405, operating the sliding frame 8 on the rotary drilling rig to vertically descend along the mast 9, and simultaneously driving the rotary excavating bucket 2 to move downwards by the power head 7 through the drill rod 10 until the rotary excavating bucket 2 extends into the installed steel sleeve;
step 406, operating the current steel sleeve to rotate, cut and vertically lower the steel sleeve according to the method in the step 303 until the height from the top of the current steel sleeve to the ground surface of the area to be constructed where the pile is located is 30-50 cm, and completing the following lowering of the current steel sleeve;
step 407, in the process of the following lowering of the next section of steel casing, when the liquid level of the wall protection slurry in the installed steel casing is lowered, the following lowering of the next section of steel casing is completed according to the method from the step 402 to the step 406; otherwise, completing the following lowering of the next section of the steel sleeve according to the method in the step 303; injecting fiber wall-protecting slurry into the installed steel sleeve until the liquid level of the fiber wall-protecting slurry is flush with the ground surface of the area to be constructed;
step 408, repeating step 407 for multiple times until the bottom of the installed steel casing passes through the first layer of karst cave and extends into the first rock stratum;
409, in the process that the bottom of the installed steel sleeve penetrates through the first layer of karst cave and extends into the first rock stratum, and when the bottom of the installed steel sleeve cannot be cut in a rotating and vertical mode, executing the steps 40A to 40C; otherwise, go to step 40D;
step 40A, disconnecting the current steel sleeve and the sleeve lowering power part 4; then the sliding frame 8 is operated to vertically descend along the mast 9, the sliding frame 8 vertically descends and the vertical power head 7 rotates to drive the rotary excavating bucket 2 to carry out rotary excavating through the drill rod 10, when the wall protection slurry in the installed steel sleeve runs off, the liquid level of the wall protection slurry descends, and the wall protection slurry enters a second layer of karst cave;
step 40B, after the fiber wall protection slurry in the installed steel sleeve runs off, firstly backfilling broken stones through the installed steel sleeve, then extending into the bottom of the installed steel sleeve through a guide pipe, and pouring C20 concrete until the fiber wall protection slurry is injected into the installed steel sleeve, wherein the fiber wall protection slurry does not run off;
step 40C, repeating the method from the step 405 to the step 408 until the bottom of the installed steel sleeve extends into a second stratum through a second layer karst cave;
step 40D, repeating the method from the step 406 to the step 407 until the bottom of the installed steel casing pipe passes through the second karst cave and extends into a second rock stratum;
and step 40E, according to the method in the steps 409 to 40D, enabling the bottom of the installed steel sleeve to penetrate through the jth karst cave and extend into the jth rock stratum until the depth of the steel sleeve matched with the hole forming meets the hole forming design depth of the bored pile, and finishing the construction of the hole forming of the bored pile.
In the embodiment, in the step 302, an upper connecting part 1-1 is arranged at the top of a first section of steel casing 1, a plurality of cutting teeth 1-3 uniformly distributed along the circumferential side wall are arranged at the bottom of the first section of steel casing 1, and the cross sections of the cutting teeth 1-3 are gradually reduced from top to bottom;
in the step 303, an upper connecting part 1-1 is arranged at the top of the ith steel sleeve, a lower connecting part 1-2 is arranged at the bottom of the ith steel sleeve, an upper connecting hole 1-1-1 and an upper positioning clamping groove 1-1-2 are arranged on the upper connecting part 1-1, a lower connecting hole 1-2-1 and a lower positioning lug 1-2-2 are arranged on the lower connecting part 1-2, the outer diameter of the lower connecting part 1-2 is smaller than the outer diameter of the ith steel sleeve, and the inner diameter of the lower connecting part 1-2 is the same as the inner diameter of the ith steel sleeve, so that an outer step part is formed at the connecting part of the lower connecting part 1-2 and the bottom of the ith steel sleeve; the outer diameter of the upper connecting part 1-1 is the same as that of the ith section of steel sleeve, and the inner diameter of the upper connecting part 1-1 is larger than that of the ith section of steel sleeve, so that an inner step part is formed at the connecting position of the upper connecting part 1-1 and the top of the ith section of steel sleeve.
In this embodiment, in step 3032, the bottom of the ith section of steel casing is connected to the top of the (i-1) th section of steel casing, and the specific process is as follows:
step A01, operating the ith section of steel sleeve to be lowered to the top of the (i-1) th section of steel sleeve until the ith section of steel sleeve extends into the (i-1) th section of steel sleeve in place; the outer side wall of a lower connecting part 1-2 in the ith section of steel sleeve is attached to the inner side wall of an upper connecting part 1-1 of the ith-1 section of steel sleeve, and a lower positioning lug 1-2-2 is clamped into an upper positioning clamping groove 1-1-2;
step A02, penetrating a connecting nut 15 into each lower connecting hole 1-2-1 of the ith steel sleeve and each upper connecting hole 1-1-1 of the ith-1 section steel sleeve, and penetrating a connecting bolt 16 into the connecting nut 15; the extending end of the connecting bolt 16 is not protruded from the inner side walls of the ith section of steel sleeve and the first section of steel sleeve 1, the outer end of the connecting bolt 16 is provided with a tool mounting hole 17, and the connection between the bottom of the ith section of steel sleeve and the top of the (i-1) th section of steel sleeve is completed.
In the embodiment, the hoisting frame 3 in the second step comprises two parallel hoisting frame cross beams 3-1 and two parallel first longitudinal beams 3-2 which are arranged on the hoisting frame cross beams 3-1, and the length between the two first longitudinal beams 3-2 is adapted to the length between the two lifting lugs 5-1; the end parts of any first longitudinal beam 3-2 and the end parts of the hanger beams 3-1 are arranged in a cross manner, so that the joint of the end part of the first longitudinal beam 3-2 and the end part of the hanger beam 3-1 is marked as a hoisting point, two second longitudinal beams 3-3 which are arranged in parallel are arranged between the two hanger beams 3-1, the distance between the two second longitudinal beams 3-3 is smaller than the distance between the two first longitudinal beams 3-2, and two hoisting holes 3-4 are arranged on any second longitudinal beam 3-3.
In this embodiment, the method for the rotary drilling rig to lift the first section of steel casing 1 through the hoisting frame 3 in the step 3022 is the same as the method for the rotary drilling rig to lift the ith section of steel casing through the hoisting frame 3 in the step 3032, which is specifically as follows:
step I, operating a sliding frame 8 on the rotary drilling rig to vertically ascend along a mast 9, and simultaneously driving a rotary excavating bucket 2 to move upwards by a power head 7 through a drill rod 10 until the rotary excavating bucket 2 lifts out an installed steel sleeve; operating a sliding frame 8 on the rotary drilling rig to deviate from the installed steel sleeve;
step II, respectively penetrating first steel wire ropes 5-3 into lifting holes 5-2 of two lifting lugs 5-1 symmetrically distributed on the outer side wall of the sliding frame 8, respectively penetrating two ends of the two first steel wire ropes 5-3 through lifting points and fixing the two ends by using steel wire rope clamps 5-4; wherein, the hoisting frame 3 is arranged in a horizontal state;
step III, enabling one end of a second steel wire rope 6-1 to penetrate through a hoisting hole 3-4 and be fixedly connected with an upper steel wire rope clamp 6-3, and enabling the other end of the second steel wire rope 6-1 to penetrate through a first section of steel sleeve 1 or an upper connecting hole 1-1-1 in an ith section of steel sleeve and be fixedly connected with a lower steel wire rope clamp 6-2;
IV, operating a sliding frame 8 in the rotary drilling rig to vertically ascend along a mast 9, and vertically ascending the sliding frame 8 to drive a first section of steel sleeve 1 or an ith section of steel sleeve to be hoisted through a first steel wire rope 5-3 and a second steel wire rope 6-1 until the bottom of the first section of steel sleeve 1 or the ith section of steel sleeve is flush with the top of the installed steel sleeve;
step V, operating a sliding frame 8 in the rotary drilling rig to move until the center lines of the first section of steel sleeve 1 lifted by the second steel wire rope 6-1 and the 1 st section of drill hole coincide or the center lines of the ith section of steel sleeve and the installed steel sleeve coincide;
and VI, operating the sliding frame 8 in the rotary drilling rig to vertically descend along the mast 9, and vertically descending the sliding frame 8 to drive the first section of steel sleeve 1 or the ith section of steel sleeve to vertically descend through the first steel wire rope 5-3 and the second steel wire rope 6-1 until the first section of steel sleeve 1 is placed in the 1 st section of drill hole or the ith section of steel sleeve extends into the ith-1 steel sleeve to be in place.
In the embodiment, the casing downward power lowering component 4 in the third step comprises a first section of cylinder 4-1, a second section of cylinder 4-2, a third section of cylinder 4-3, a fourth section of cylinder 4-4 and a fifth section of cylinder 4-5 which are formed from bottom to top at one step, the outer diameter of the first section of cylinder 4-1 is the same as that of the third section of cylinder 4-3, the outer diameter of the second section of cylinder 4-2 is larger than that of the first section of cylinder 4-1, the outer diameter of the fourth section of tube 4-4 is gradually reduced from bottom to top, the outer diameter of the fifth section of tube 4-5 is the same as the minimum outer diameter of the fourth section of tube 4-4, the fifth section of tube 4-5 extends into the bottom of the power head 7, the bottom of the fifth section of tube 4-5 is connected with the bottom of the power head 7 through a bolt 11, and a through hole 4-3-1 is formed in the third section of tube 4-3;
the method for connecting the top end of the first section of steel casing 1 with the casing running power part 4 in the step 3023 and the method for connecting the top end of the ith section of steel casing with the casing running power part 4 in the step 3033 are the same, and the specific process is as follows:
step B01, arranging each bottom connecting hole 4-1-1 on the first section of barrel 4-1;
b02, penetrating a connecting nut 15 into each bottom connecting hole 4-1-1 and the upper connecting hole 1-1-1 in the first section of steel sleeve 1 or the ith section of steel sleeve, and penetrating a connecting bolt 16 into the connecting nut 15; the extending end of the connecting bolt 16 is not protruded from the inner side wall of the first section of cylinder 4-1, and the outer end of the connecting bolt 16 is provided with a tool mounting hole 17 to complete the connection of the first section of cylinder 4-1 and the first section of steel sleeve 1 or the ith section of steel sleeve.
In this embodiment, the backfill soil in step 404 is composed of clay, bentonite, and cellulose, and the ratio of clay: bentonite: the cellulose accounts for 70-85% by weight: (10-20%): (5-10%);
the fiber wall-protecting slurry is composed of water, bentonite, clay, caustic soda and cellulose, and the weight ratio of water to bentonite is as follows: clay: caustic soda: the mass ratio of the cellulose is 1000: (100-120): (10-30): (2.5-4): 0.6;
in the step 40B, the particle size of the crushed stone is less than 25 mm.
In the embodiment, the depth of the 1 st section of drilling hole is 1/2-2/3 of the length of the first section of steel casing 1, and the depth of the ith section of drilling hole is 5/8-6/8 of the length of the ith section of steel casing.
In this embodiment, the upper formation is a water-rich formation.
In this embodiment, the length of the first section of steel casing 1 is 3m, the inner diameter of the first section of steel casing 1 is 1.25m, and the wall thickness of the first section of steel casing 1 is 4 cm.
In the embodiment, the length of the ith section of steel sleeve is 4m, the inner diameter of the ith section of steel sleeve is 1.25m, and the wall thickness of the ith section of steel sleeve is 4 cm;
in this embodiment, during the in-service use, adjust the length of last section steel casing pipe according to bored pile pore-forming design depth.
In this embodiment, in actual use, the first steel casing section 1 and the ith steel casing section are made of Q235 steel plates.
In conclusion, the method has simple steps and reasonable design, can realize the construction of the rotary drilling rig and the follow-up lowering of the steel sleeve by arranging the sleeve lowering power part on the rotary drilling rig, effectively adapts to the hole forming of the bored pile in the complex stratum, and has the advantages of small required construction equipment, high equipment utilization rate, high hole forming speed, high construction efficiency and low cost.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (7)
1. A complex stratum rotary drilling steel sleeve matched hole forming method is characterized by comprising the following steps:
leveling a construction site and measuring and placing a pile position:
step 101, clearing and leveling obstacles in a region to be constructed so as to keep the ground surface of the region to be constructed at the same elevation; the region to be constructed comprises an upper stratum and a lower karst stratum from top to bottom;
102, measuring and placing pile positions in a ground surface area of a region to be constructed according to a construction design drawing;
step two, manufacturing a hoisting frame:
manufacturing a hoisting frame (3);
step three, drilling of the rotary drilling rig for the upper stratum and follow-up lowering of the steel sleeve:
301, installing a sleeve pipe lower power part (4) at the bottom of a power head (7) in the rotary drilling rig; wherein the casing lowering power part (4) is of a hollow structure; wherein a sliding frame (8) in the rotary drilling rig is connected with a power head (7);
step 302, drilling of a drilling machine and construction of a first section of steel sleeve (1), wherein the concrete process is as follows:
step 3021, a rotary drilling bucket (2) is installed on the bottom of a drill rod (10) in the rotary drilling rig, the drill rod penetrates through a power head (7) and a sleeve to lower a power part (4), a sliding frame (8) on the rotary drilling rig is operated to vertically descend along a mast (9), and meanwhile, the power head (7) rotates to drive the drill rod (10) to rotate, so that the drill rod (10) rotates and descends to drive the rotary drilling bucket (2) to carry out rotary drilling at the pile position for the section 1, and the section 1 drilling hole is formed; wherein the depth of the 1 st section of drilling is less than the length of the first section of steel sleeve (1);
step 3022, hoisting the first section of steel sleeve (1) by the rotary drilling rig through the hoisting frame (3), and lowering the first section of steel sleeve (1) into the section 1 of the drilled hole;
step 3023, connecting the top end of the first section of steel sleeve (1) with a sleeve lowering power part (4), and coaxially arranging the first section of steel sleeve (1), the drill rod (10) and the 1 st section of drill hole;
step 3024, operating the sliding frame (8) to vertically descend along the mast (9), vertically descending the sliding frame (8) and rotating the vertical power head (7) to drive the rotary excavating bucket (2) to rotationally dig through the drill rod (10), and simultaneously vertically descending the sliding frame (8) and rotating the vertical power head (7) to drive the first section of steel sleeve (1) to rotationally cut and vertically descend along the 1 st section of drilled hole through the sleeve descending power part (4) until the height from the top of the first section of steel sleeve (1) to the ground surface of the area to be constructed where the pile is located is 30-50 cm, and completing the installation of the first section of steel sleeve (1);
step 3025, removing the connection between the first section of steel sleeve (1) and the casing lowering power part (4);
step 3026, operating the sliding frame (8) on the rotary drilling rig to vertically ascend along the mast (9), and driving the rotary excavating bucket (2) to move upwards by the power head (7) through the drill rod (10) until the rotary excavating bucket (2) lifts out the first section of steel sleeve (1) for dumping soil;
step 303, drilling of the digging and drilling machine and construction of the ith section of steel sleeve, wherein the concrete process is as follows:
3031, operating the sliding frame (8) to vertically descend along the mast (9), and simultaneously rotating the power head (7) to drive the drill rod (10) to rotate so that the drill rod (10) descends while rotating to drive the rotary excavating bucket (2) to carry out the ith section of rotary excavation at the pile position to form the ith section of drilled hole; the depth of the ith section of drilling hole is smaller than the length of the ith section of steel sleeve;
3032, hoisting the ith section of steel sleeve by the rotary drilling rig through the hoisting frame (3), and lowering the ith section of steel sleeve to the top of the (i-1) section of steel sleeve, wherein the bottom of the ith section of steel sleeve is connected with the top of the (i-1) section of steel sleeve; wherein i is a positive integer, and i is more than or equal to 2;
3033, connecting the top end of the ith section of steel sleeve with a sleeve lowering power part (4), and coaxially arranging the ith section of steel sleeve, a drill rod (10) and the ith section of drill hole;
step 3034, the sliding frame (8) is operated to vertically descend along the mast (9), the sliding frame (8) vertically descends, the vertical power head (7) rotates to drive the rotary excavating bucket (2) to rotationally dig through the drill rod (10), and meanwhile the sliding frame (8) vertically descends and the vertical power head (7) rotates to drive the ith section of steel sleeve to rotate and cut along the ith section of drilled hole through the sleeve lowering power part (4) and vertically descend until the height from the top of the ith section of steel sleeve to the ground surface of a region where the pile is located to be constructed is 30-50 cm, and the following-in descending of the ith section of steel sleeve is completed;
3035, dismantling the connection between the ith section of steel sleeve and the sleeve lowering power part (4);
3036, operating the upper sliding frame (8) of the rotary drilling rig to vertically ascend along the mast (9), and driving the rotary excavating bucket (2) to upwards move by the power head (7) through the drill rod (10) until the rotary excavating bucket (2) lifts the ith section of steel sleeve (1) for dumping soil;
3037, recording the steel sleeves from the first section of steel sleeve (1) to the ith section of steel sleeve as installed steel sleeves, and injecting wall protection slurry into the installed steel sleeves until the liquid level of the wall protection slurry is flush with the ground surface of the area to be constructed;
step 304, repeating step 303 for multiple times, and carrying out follow-up lowering of the next section of steel sleeve;
fourthly, drilling the rotary excavation drilling machine in the lower karst stratum and lowering the steel sleeve in the follow-up mode:
step 401, when the wall protection slurry in the installed steel sleeve runs off, the liquid level of the wall protection slurry is lowered, and the wall protection slurry enters a first layer of karst cave in a karst stratum; the karst stratum is divided into a first karst cave, a first rock stratum, a second karst cave and a second rock stratum from top to bottom in sequence, wherein the jth karst cave and the jth rock stratum are arranged in sequence; wherein j is a positive integer;
402, when the liquid level of the wall protection slurry in the installed steel sleeve descends, if the sleeve lowering power piece (4) is connected with the steel sleeve, disconnecting the current steel sleeve from the sleeve lowering power piece (4), and executing 403; if the casing lowering power part (4) is not connected with a steel casing, executing step 403;
step 403, operating the sliding frame (8) to vertically ascend along the mast (9), and simultaneously driving the rotary excavating bucket (2) to move upwards by the power head (7) through the drill rod (10) until the rotary excavating bucket (2) lifts out the installed steel sleeve;
step 404, after the wall protection slurry in the installed steel sleeve runs off, injecting backfill soil through the installed steel sleeve until the fiber maintenance wall slurry is injected into the installed steel sleeve, wherein the fiber wall protection slurry does not run off;
step 405, operating a sliding frame (8) on the rotary drilling rig to vertically descend along a mast (9), and simultaneously driving a rotary excavating bucket (2) to move downwards by a power head (7) through a drill rod (10) until the rotary excavating bucket (2) extends into an installed steel sleeve;
step 406, operating the current steel sleeve to rotate, cut and vertically lower the steel sleeve according to the method in the step 303 until the height from the top of the current steel sleeve to the ground surface of the area to be constructed where the pile is located is 30-50 cm, and completing the following lowering of the current steel sleeve;
step 407, in the process of the following lowering of the next section of steel casing, when the liquid level of the wall protection slurry in the installed steel casing is lowered, the following lowering of the next section of steel casing is completed according to the method from the step 402 to the step 406; otherwise, completing the following lowering of the next section of the steel sleeve according to the method in the step 303; injecting fiber wall-protecting slurry into the installed steel sleeve until the liquid level of the fiber wall-protecting slurry is flush with the ground surface of the area to be constructed;
step 408, repeating step 407 for multiple times until the bottom of the installed steel casing passes through the first layer of karst cave and extends into the first rock stratum;
409, in the process that the bottom of the installed steel sleeve penetrates through the first layer of karst cave and extends into the first rock stratum, and when the bottom of the installed steel sleeve cannot be cut in a rotating and vertical mode, executing the steps 40A to 40C; otherwise, go to step 40D;
step 40A, disconnecting the current steel sleeve and the sleeve lowering power piece (4); then the sliding frame (8) is operated to vertically descend along the mast (9), the sliding frame (8) vertically descends, the vertical power head (7) rotates to drive the rotary excavating bucket (2) to rotationally dig through the drill rod (10), when the wall protection slurry in the installed steel sleeve runs off, the liquid level of the wall protection slurry descends, and the situation that the wall protection slurry enters a second layer of karst cave is shown;
step 40B, after the fiber wall protection slurry in the installed steel sleeve runs off, firstly backfilling broken stones through the installed steel sleeve, then extending into the bottom of the installed steel sleeve through a guide pipe, and pouring C20 concrete until the fiber wall protection slurry is injected into the installed steel sleeve, wherein the fiber wall protection slurry does not run off;
step 40C, repeating the method from the step 405 to the step 408 until the bottom of the installed steel sleeve extends into a second stratum through a second layer karst cave;
step 40D, repeating the method from the step 406 to the step 407 until the bottom of the installed steel casing pipe passes through the second karst cave and extends into a second rock stratum;
and step 40E, according to the method in the steps 409 to 40D, enabling the bottom of the installed steel sleeve to penetrate through the jth karst cave and extend into the jth rock stratum until the depth of the steel sleeve matched with the hole forming meets the hole forming design depth of the bored pile, and finishing the construction of the hole forming of the bored pile.
2. The complex formation rotary drilling steel sleeve matched hole forming method according to claim 1, which is characterized in that: in the step 302, an upper connecting part (1-1) is arranged at the top of a first section of steel sleeve (1), a plurality of cutting teeth (1-3) uniformly distributed along the circumferential side wall are arranged at the bottom of the first section of steel sleeve (1), and the cross sections of the cutting teeth (1-3) are gradually reduced from top to bottom;
in the step 303, an upper connecting part (1-1) is arranged at the top of the ith steel sleeve, a lower connecting part (1-2) is arranged at the bottom of the ith steel sleeve, an upper connecting hole (1-1-1) and an upper positioning clamping groove (1-1-2) are arranged on the upper connecting part (1-1), a lower connecting hole (1-2-1) and a lower positioning lug (1-2-2) are arranged on the lower connecting part (1-2), the outer diameter of the lower connecting part (1-2) is smaller than the outer diameter of the ith steel sleeve, and the inner diameter of the lower connecting part (1-2) is the same as that of the ith steel sleeve, so that an outer step part is formed at the connecting part of the lower connecting part (1-2) and the bottom of the ith steel sleeve; the outer diameter of the upper connecting part (1-1) is the same as that of the ith section of steel sleeve, and the inner diameter of the upper connecting part (1-1) is larger than that of the ith section of steel sleeve, so that an inner step part is formed at the connecting position of the top parts of the upper connecting part (1-1) and the ith section of steel sleeve.
3. The complex formation rotary drilling steel sleeve matched hole forming method according to claim 2, which is characterized in that: in the step 3032, the bottom of the ith section of steel sleeve is connected with the top of the (i-1) th section of steel sleeve, and the specific process is as follows:
step A01, operating the ith section of steel sleeve to be lowered to the top of the (i-1) th section of steel sleeve until the ith section of steel sleeve extends into the (i-1) th section of steel sleeve in place; the outer side wall of a lower connecting part (1-2) in the ith section of steel sleeve is attached to the inner side wall of an upper connecting part (1-1) of the ith-1 section of steel sleeve, and a lower positioning lug (1-2-2) is clamped into an upper positioning clamping groove (1-1-2);
a02, penetrating a connecting nut (15) into each lower connecting hole (1-2-1) of the ith steel sleeve and each upper connecting hole (1-1-1) of the ith-1 section of steel sleeve, and penetrating a connecting bolt (16) into the connecting nut (15); the connecting bolt is characterized in that the extending end of the connecting bolt (16) does not protrude out of the inner side wall of the ith section of steel sleeve and the first section of steel sleeve (1), a tool mounting hole (17) is formed in the outer end of the connecting bolt (16), and the connection between the bottom of the ith section of steel sleeve and the top of the (i-1) th section of steel sleeve is completed.
4. The complex formation rotary drilling steel sleeve matched hole forming method according to claim 1, which is characterized in that: in the second step, the hoisting frame (3) comprises two parallel hoisting frame cross beams (3-1) and two parallel first longitudinal beams (3-2) which are arranged on the hoisting frame cross beams (3-1), and the length between the two first longitudinal beams (3-2) is matched with the length between the two lifting lugs (5-1); the end part of any first longitudinal beam (3-2) and the end part of the hanger beam (3-1) are arranged in a cross manner, so that the joint of the end part of the first longitudinal beam (3-2) and the end part of the hanger beam (3-1) is marked as a hoisting point, two second longitudinal beams (3-3) which are arranged in parallel are arranged between the two hanger beams (3-1), the distance between the two second longitudinal beams (3-3) is smaller than that between the two first longitudinal beams (3-2), and two hoisting holes (3-4) are arranged on any second longitudinal beam (3-3).
5. The complex formation rotary drilling steel sleeve matched hole forming method according to claim 4, which is characterized in that: the method for hoisting the first section of steel sleeve (1) by the rotary drilling rig through the hoisting frame (3) in the step 3022 is the same as the method for hoisting the ith section of steel sleeve by the rotary drilling rig through the hoisting frame (3) in the step 3032, and specifically comprises the following steps:
step I, operating an upper sliding frame (8) of the rotary drilling rig to vertically ascend along a mast (9), and simultaneously driving a rotary excavating bucket (2) to move upwards by a power head (7) through a drill rod (10) until the rotary excavating bucket (2) lifts out an installed steel sleeve; operating a sliding frame (8) on the rotary drilling rig to deviate from the installed steel sleeve;
step II, respectively penetrating first steel wire ropes (5-3) into lifting holes (5-2) of two lifting lugs (5-1) symmetrically distributed on the outer side wall of the sliding frame (8), and respectively enabling two ends of the two first steel wire ropes (5-3) to penetrate through lifting points and fixing the two ends by using steel wire rope clamps (5-4); wherein, the hoisting frame (3) is arranged in a horizontal state;
step III, enabling one end of a second steel wire rope (6-1) to penetrate through the hoisting hole (3-4) and be provided with an upper steel wire rope clamp (6-3) for fixedly connecting, and enabling the other end of the second steel wire rope (6-1) to penetrate through a first steel sleeve (1) or an upper connecting hole (1-1-1) in an ith steel sleeve and be fixedly connected through a lower steel wire rope clamp (6-2);
step IV, operating a sliding frame (8) in the rotary drilling rig to vertically ascend along a mast (9), and vertically ascending the sliding frame (8) to drive a first section of steel sleeve (1) or an ith section of steel sleeve to be lifted through a first steel wire rope (5-3) and a second steel wire rope (6-1) until the bottom of the first section of steel sleeve (1) or the ith section of steel sleeve is flush with the top of the installed steel sleeve;
step V, operating a sliding frame (8) in the rotary drilling rig to move until the center lines of a first section of steel sleeve (1) lifted by a second steel wire rope (6-1) and a section 1 of drill hole coincide or the center lines of an ith section of steel sleeve and an installed steel sleeve coincide;
and VI, operating a sliding frame (8) in the rotary drilling rig to vertically descend along a mast (9), and vertically descending the sliding frame (8) to drive a first section of steel sleeve (1) or an ith section of steel sleeve to vertically descend through a first steel wire rope (5-3) and a second steel wire rope (6-1) until the first section of steel sleeve (1) is lowered into the 1 st section of drill hole or the ith section of steel sleeve extends into the ith-1 steel sleeve to be in place.
6. The complex formation rotary drilling steel sleeve matched hole forming method according to claim 4, which is characterized in that: in the third step, the casing pipe downward power lowering part (4) comprises a first section of barrel (4-1), a second section of barrel (4-2), a third section of barrel (4-3), a fourth section of barrel (4-4) and a fifth section of barrel (4-5) which are formed from bottom to top in one step, the outer diameter of the first section of barrel (4-1) is the same as that of the third section of barrel (4-3), the outer diameter of the second section of barrel (4-2) is larger than that of the first section of barrel (4-1), the outer diameter of the fourth section of barrel (4-4) is gradually reduced from bottom to top, the outer diameter of the fifth section of barrel (4-5) is the same as the minimum outer diameter of the fourth section of barrel (4-4), the fifth section of barrel (4-5) extends into the bottom of the power head (7), and the bottom of the fifth section of barrel (4-5) is connected with the bottom of the power head (7) through a bolt (11), the third section of barrel (4-3) is provided with a through hole (4-3-1);
the method for connecting the top end of the first section of steel sleeve (1) with the sleeve lowering power part (4) in the step 3023 and the method for connecting the top end of the ith section of steel sleeve with the sleeve lowering power part (4) in the step 3033 are the same, and the specific processes are as follows:
step B01, arranging bottom connecting holes (4-1-1) on the first section of barrel (4-1);
b02, penetrating a connecting nut (15) into each bottom connecting hole (4-1-1) and the upper connecting hole (1-1-1) in the first section of steel sleeve (1) or the ith section of steel sleeve, and penetrating a connecting bolt (16) into the connecting nut (15); the extending end of the connecting bolt (16) is not protruded from the inner side wall of the first section of cylinder (4-1), the outer end of the connecting bolt (16) is provided with a tool mounting hole (17), and the connection between the first section of cylinder (4-1) and the first section of steel sleeve (1) or the ith section of steel sleeve is completed.
7. The complex formation rotary drilling steel sleeve matched hole forming method according to claim 1, which is characterized in that: the backfill in step 404 is comprised of clay, bentonite, and cellulose, and the clay: bentonite: the cellulose accounts for 70-85% by weight: (10-20%): (5-10%);
the fiber wall-protecting slurry is composed of water, bentonite, clay, caustic soda and cellulose, and the weight ratio of water to bentonite is as follows: clay: caustic soda: the mass ratio of the cellulose is 1000: (100-120): (10-30): (2.5-4): 0.6;
in the step 40B, the particle size of the crushed stone is less than 25 mm.
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| CN114320204B (en) * | 2021-12-31 | 2023-03-21 | 中国水利水电第三工程局有限公司 | Drill jamming treatment method for reverse-pulling hole expanding construction of inclined shaft in unfavorable geological section |
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| CN109555116A (en) * | 2018-11-08 | 2019-04-02 | 广东省第建筑工程有限公司 | A kind of high density karst intense development area fully-sleeved filled pile construction method |
| CN110424381A (en) * | 2019-08-19 | 2019-11-08 | 首钢水城钢铁(集团)赛德建设有限公司 | A kind of process for rotary digging drilling hole stake |
| CN111594041A (en) * | 2020-04-22 | 2020-08-28 | 中铁大桥局集团第五工程有限公司 | Rapid hole forming construction method for large-diameter deep hole pile foundation under karst geology |
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