CN112360344A - Shield type rapid hole forming construction method - Google Patents
Shield type rapid hole forming construction method Download PDFInfo
- Publication number
- CN112360344A CN112360344A CN202011151722.9A CN202011151722A CN112360344A CN 112360344 A CN112360344 A CN 112360344A CN 202011151722 A CN202011151722 A CN 202011151722A CN 112360344 A CN112360344 A CN 112360344A
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- pile
- concrete
- drilling
- hole
- pile casing
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- 238000010276 construction Methods 0.000 title claims abstract description 30
- 238000005553 drilling Methods 0.000 claims abstract description 60
- 230000002787 reinforcement Effects 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 239000002689 soil Substances 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 8
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 3
- 239000011435 rock Substances 0.000 abstract description 2
- 239000010802 sludge Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B33/138—Plastering the borehole wall; Injecting into the formation
Abstract
The invention discloses a shield type rapid pore-forming construction method, which comprises the following steps of; step (1), arranging a protective cylinder; step (2), positioning a drilling machine; step (3), drilling equipment; step (4), cleaning the hole; step (5), manufacturing a reinforcement cage; step (6), immediately installing a concrete pouring guide pipe after the reinforcement cage is placed to the designed depth, and avoiding the collision between the guide pipe and the reinforcement cage, wherein the guide pipe is made of a steel pipe with the diameter of 200 and 300 mm; and (7) pouring underwater concrete. According to the invention, soil and rock are cut into powder and then conveyed to the mud pit for filtering and separating, and the powder is circulated into the hole for wall protection, the construction process is similar to shield push type hole forming, the drill lifting is not needed, the construction efficiency is high, the application range is very wide, the technical problem that the flow plastic layer collapses all the time is overcome, the drill lifting is not needed in the hole forming process, and the construction efficiency is high.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a shield type rapid hole forming construction method.
Background
The mechanization degree of the bored concrete pile formed by the rotary drilling rig is high, and the method is a main trend of construction in the foundation and foundation industries in the future, but the rotary drilling construction can be carried out under the geological condition with complex geological conditions by matching with a deep pile casing, the difficulty of the rotary drilling under the condition of plastic soil and deep holes is high, the technical level and the benefit are low, and the shield type rapid hole forming construction method is provided.
Disclosure of Invention
The invention aims to provide a shield type rapid hole forming construction method to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a shield type rapid hole forming construction method comprises the following steps;
step (1), arranging a protective cylinder;
arranging a pile casing according to the pile site, wherein the inner diameter of the pile casing is 50-100mm larger than the diameter of the drill bit, the deviation between the center of the pile casing and the center of the pile site is not more than 50mm, the deviation of the inclination is not more than 0.5%, and the space between the pile casing and the pit wall is filled with clay;
step (2), positioning a drilling machine;
the drilling machine keeps stable and does not incline or displace, the drill bit is aligned with the hole position and the motor is started to open the hole, when the drill bit is aligned with the cross line of the center of the pile position, all data can be locked without adjustment, the center of the drill bit and the center of the pile are accurately aligned after the drilling machine is in place, and the error is controlled within 10 mm;
step (3), drilling equipment;
the drilling is started, the drilling speed is stable and cannot be too fast, a drilling machine is not forced to be pressurized when a rigid object, a steel bar and an old concrete foundation are met, the slurry construction is observed in the drilling process to meet the requirement of slurry wall protection, and a slurry blender and bentonite are added when necessary;
step (4), cleaning the hole;
a reverse circulation slurry drilling machine system is adopted, the hole bottom is very clean after the hole is formed, and after the slurry concentration is well mixed, the drill is slowly lifted through a valve;
step (5), manufacturing a reinforcement cage;
a reinforcement cage manufacturing machine is adopted, the reinforcement cage is ensured to be straight when being placed downwards, the steel reinforcement cage is strictly prevented from swinging and colliding with the hole wall, reinforcement protection blocks are added in the installation process, the set distance is 2 meters, and the thickness of the reinforcement cage protection layer is ensured;
step (6), immediately installing a concrete pouring guide pipe after the reinforcement cage is placed to the designed depth, and avoiding the collision between the guide pipe and the reinforcement cage, wherein the guide pipe is made of a steel pipe with the diameter of 200 and 300 mm;
pouring underwater concrete;
s1, when the concrete is poured, in order to discharge the water-proof bolt smoothly, the distance from the bottom of the guide pipe to the bottom of the hole is preferably 30-50cm, the guide pipe is buried more than 1.0m below the concrete surface once, the buried depth of the guide pipe is preferably 2-6m in the pouring process, the guide pipe is prevented from being lifted out of the concrete surface,
s2, continuously pouring concrete, wherein the height of the top of the poured pile is pre-increased by a certain height which is 50-100cm higher than the designed height, the pre-increased height can be chiseled after the foundation pit is excavated, and the pile body is prevented from being damaged during chiseling;
s3, the steel pile casing below the ground and the pile top can be lifted after the concrete is poured, and the influence on the quality of the pile body caused by the inclusion of filling sundries or silt into the concrete in the lifting process is prevented;
and S4, after the pouring is finished, finishing and flushing the site, and removing concrete deposits on equipment and tools.
Preferably, in the step (1), the embedding of the pile casing adopts a rotary drilling rig static pressure method to sink in sections, and the pile casing sinks to the designed depth in cooperation with a vibration hammer, and the concrete operation is as follows: and (3) correctly positioning the drilling machine to enable the perpendicularity of the machine body, the perpendicularity of the drill rod and the central line of the pile casing to be integrated, then bringing a cylindrical drill bit at the top of the drill rod, hoisting the pile casing by using a crane and correctly positioning, vertically pressing the pile casing into the soil body by using a rotary drilling rod, leading the pile position center back through four control pile casings after the pile casing is buried, enabling the center of the pile casing to coincide with the pile position center, and marking the position of the pile casing direction line by using red paint on the pile casing.
Preferably, in the step (2), the chassis of the rotary drilling rig is a telescopic automatic leveling device, and an instrument is arranged in an operation chamber to accurately display electronic readings.
Preferably, in the step (4), negative pressure is formed by avoiding too fast drilling of hands, so that the hole wall is shrunk, and the quality of formed holes cannot meet the requirement.
Preferably, in step (6), the inner wall surface of the conduit should be smooth and have sufficient strength and rigidity, and the joint of the pipe sections should be well sealed and easy to assemble and disassemble.
Preferably, the reverse circulation mud drilling machine system comprises the ground, a drilling machine, a mud pump, a drill rod, a drill bit, a conveying pipe, a mud storage cavity, a mud filtering device and a circulating pipe;
the drilling machine is arranged at the top end of the ground, a mud pump is arranged in the drilling machine, a driving end of the drilling machine drives a drill rod to move downwards, an input end of the mud pump is connected with the drill rod, a drill bit is assembled at the bottom end of the drill rod, an output end of the mud pump is connected with one end of a conveying pipe, the other end of the conveying pipe extends into a mud storage cavity formed in the upper surface of the ground, a mud filtering device is assembled on the side surface of the mud storage cavity, one end of a circulating pipe is assembled on the side surface of the mud filtering device, and the other end of.
The shield type rapid hole forming construction method provided by the invention has the beneficial effects that:
1. according to the invention, soil and rock are cut into powder and then conveyed to a mud pit for filtration and separation, and are circulated to the hole for wall protection, the construction process is similar to 'shield' push type hole forming, the drill lifting is not needed, and the construction efficiency is high;
2. the invention has wide application range, overcomes the technical problem of hole collapse of the flow plastic layer, does not need to lift a drill in the hole forming process and has high construction efficiency.
Drawings
FIG. 1 is a process flow diagram of a shield-type rapid hole-forming construction method according to the present invention;
FIG. 2 is a schematic diagram of a system mechanism of a reverse circulation mud drilling machine of the shield type rapid hole forming construction method.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1, please refer to fig. 1-2, the present invention provides a technical solution: a shield type rapid hole forming construction method comprises the following steps;
step (1), arranging a protective cylinder;
arranging a pile casing according to the pile site, wherein the inner diameter of the pile casing is 50-100mm larger than the diameter of the drill bit, the deviation between the center of the pile casing and the center of the pile site is not more than 50mm, the deviation of the inclination is not more than 0.5%, and the space between the pile casing and the pit wall is filled with clay;
the embedding of the pile casing adopts a rotary drilling rig static pressure method to sink in sections, the vibration hammer is matched to sink to the designed depth, and the concrete operation is as follows: a drilling machine is correctly positioned, the perpendicularity of a machine body, the perpendicularity of a drill rod and the central line of a pile casing are integrated, then a cylindrical drill bit is arranged at the top of the drill rod, the pile casing is hoisted by a crane and correctly positioned, the drill rod is rotationally dug to vertically press the pile casing into a soil body, the pile position center is led back through four control pile casings after the pile casing is buried, the center of the pile casing is coincided with the pile position center, and the position of the pile casing direction line is marked by red paint on the pile casing;
step (2), positioning a drilling machine;
the drilling machine keeps stable and does not incline or displace, the drill bit is aligned with the hole position and the motor is started to open the hole, when the drill bit is aligned with the cross line of the center of the pile position, all data can be locked without adjustment, the center of the drill bit and the center of the pile are accurately aligned after the drilling machine is in place, and the error is controlled within 10 mm;
the chassis of the rotary drilling rig is a telescopic automatic leveling device, and an instrument accurately displays electronic readings in an operation chamber;
step (3), drilling equipment;
the drilling is started, the drilling speed is stable and cannot be too fast, a drilling machine is not forced to be pressurized when a rigid object, a steel bar and an old concrete foundation are met, the slurry construction is observed in the drilling process to meet the requirement of slurry wall protection, and a slurry blender and bentonite are added when necessary;
step (4), cleaning holes:
by adopting a reverse circulation mud drilling machine system, the bottom of a hole is very clean after the hole is formed, and after the mud concentration is well regulated, the drill is slowly lifted by opening a valve, so that the situation that the hole wall is shrunk due to negative pressure formed by too fast lifting of the drill is avoided, and the hole forming quality cannot meet the requirements;
the reverse circulation mud drilling machine system comprises a ground 1, a drilling machine 2, a mud pump 3, a drill rod 4, a drill bit 5, a conveying pipe 6, a mud storage cavity 7, a mud filtering device 8 and a circulating pipe 9;
the top end of the ground 1 is provided with a drilling machine 2, a slurry pump 3 is arranged in the drilling machine 2, a driving end of the drilling machine 2 drives a drill rod 4 to move downwards, an input end of the slurry pump 3 is connected with the drill rod 4, the bottom end of the drill rod 4 is provided with a drill bit 5, an output end of the slurry pump 3 is connected with one end of a conveying pipe 6, the other end of the conveying pipe 6 extends into a sludge storage cavity 7 formed in the upper surface of the ground 1, the side surface of the sludge storage cavity 7 is provided with a sludge filtering device 8, the side surface of the sludge filtering device 8 is provided with one end of a circulating;
the mud produced by mechanical construction is utilized in the pore-forming process, and is circulated into the hole for wall protection after being filtered, so that the technical requirement of stability in the hole is met, the hole is cleaned after the hole is drilled to the designed hole depth, the drill bit is provided with a one-way opening and closing mud hole, negative pressure is avoided in the drill bit lifting process, the hole wall is ensured to be stable and not collapse, and then reinforcement cage installation and concrete pouring construction are carried out, so that a bored pile is formed;
step (5), manufacturing a reinforcement cage;
a reinforcement cage manufacturing machine is adopted, the reinforcement cage is ensured to be straight when being placed downwards, the steel reinforcement cage is strictly prevented from swinging and colliding with the hole wall, reinforcement protection blocks are added in the installation process, the set distance is 2 meters, and the thickness of the reinforcement cage protection layer is ensured;
step (6), immediately installing a concrete pouring guide pipe after the reinforcement cage is placed to the designed depth, so as to avoid the collision between the guide pipe and the reinforcement cage, wherein the guide pipe is made of a steel pipe with the diameter of 200 plus 300mm, the surface of the inner wall of the guide pipe is smooth and has enough strength and rigidity, and the joint of the pipe section is well sealed and convenient to assemble and disassemble;
pouring underwater concrete;
s1, when the concrete is poured, in order to discharge the water-proof bolt smoothly, the distance from the bottom of the guide pipe to the bottom of the hole is preferably 30-50cm, the guide pipe is buried more than 1.0m below the concrete surface once, the buried depth of the guide pipe is preferably 2-6m in the pouring process, the guide pipe is prevented from being lifted out of the concrete surface,
s2, continuously pouring concrete, wherein the height of the top of the poured pile is pre-increased by a certain height which is 50-100cm higher than the designed height, the pre-increased height can be chiseled after the foundation pit is excavated, and the pile body is prevented from being damaged during chiseling;
s3, the steel pile casing below the ground and the pile top can be lifted after the concrete is poured, and the influence on the quality of the pile body caused by the inclusion of filling sundries or silt into the concrete in the lifting process is prevented;
and S4, after the pouring is finished, finishing and flushing the site, and removing concrete deposits on equipment and tools.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A shield type rapid hole forming construction method is characterized in that: comprises the following steps;
step (1), arranging a protective cylinder;
arranging a pile casing according to the pile site, wherein the inner diameter of the pile casing is 50-100mm larger than the diameter of the drill bit, the deviation between the center of the pile casing and the center of the pile site is not more than 50mm, the deviation of the inclination is not more than 0.5%, and the space between the pile casing and the pit wall is filled with clay;
step (2), positioning a drilling machine;
the drilling machine keeps stable and does not incline or displace, the drill bit is aligned with the hole position and the motor is started to open the hole, when the drill bit is aligned with the cross line of the center of the pile position, all data can be locked without adjustment, the center of the drill bit and the center of the pile are accurately aligned after the drilling machine is in place, and the error is controlled within 10 mm;
step (3), equipment drilling:
the drilling is started, the drilling speed is stable and cannot be too fast, a drilling machine is not forced to be pressurized when a rigid object, a steel bar and an old concrete foundation are met, the slurry construction is observed in the drilling process to meet the requirement of slurry wall protection, and a slurry blender and bentonite are added when necessary;
step (4), cleaning holes:
a reverse circulation slurry drilling machine system is adopted, the hole bottom is very clean after the hole is formed, and after the slurry concentration is well mixed, the drill is slowly lifted through a valve;
step (5), manufacturing a reinforcement cage;
a reinforcement cage manufacturing machine is adopted, the reinforcement cage is ensured to be straight when being placed downwards, the steel reinforcement cage is strictly prevented from swinging and colliding with the hole wall, reinforcement protection blocks are added in the installation process, the set distance is 2 meters, and the thickness of the reinforcement cage protection layer is ensured;
step (6), immediately installing a concrete pouring guide pipe after the reinforcement cage is placed to the designed depth, and avoiding the collision between the guide pipe and the reinforcement cage, wherein the guide pipe is made of a steel pipe with the diameter of 200 and 300 mm;
pouring underwater concrete;
s1, when the concrete is poured, in order to discharge the water-proof bolt smoothly, the distance from the bottom of the guide pipe to the bottom of the hole is preferably 30-50cm, the guide pipe is buried more than 1.0m below the concrete surface once, the buried depth of the guide pipe is preferably 2-6m in the pouring process, the guide pipe is prevented from being lifted out of the concrete surface,
s2, continuously pouring concrete, wherein the height of the top of the poured pile is pre-increased by a certain height which is 50-100cm higher than the designed height, the pre-increased height can be chiseled after the foundation pit is excavated, and the pile body is prevented from being damaged during chiseling;
s3, the steel pile casing below the ground and the pile top can be lifted after the concrete is poured, and the influence on the quality of the pile body caused by the inclusion of filling sundries or silt into the concrete in the lifting process is prevented;
and S4, after the pouring is finished, finishing and flushing the site, and removing concrete deposits on equipment and tools.
2. The shield type rapid hole forming construction method according to claim 1, characterized in that: in the step (1), the embedding of the pile casing adopts a rotary drilling rig static pressure method to sink in sections, and the pile casing sinks to the designed depth in cooperation with a vibration hammer, and the concrete operation is as follows: and (3) correctly positioning the drilling machine to enable the perpendicularity of the machine body, the perpendicularity of the drill rod and the central line of the pile casing to be integrated, then bringing a cylindrical drill bit at the top of the drill rod, hoisting the pile casing by using a crane and correctly positioning, vertically pressing the pile casing into the soil body by using a rotary drilling rod, leading the pile position center back through four control pile casings after the pile casing is buried, enabling the center of the pile casing to coincide with the pile position center, and marking the position of the pile casing direction line by using red paint on the pile casing.
3. The shield type rapid hole forming construction method according to claim 1, characterized in that: in the step (2), the chassis of the rotary drilling rig is a telescopic automatic leveling device, and an instrument is arranged in an operation room to accurately display electronic readings.
4. The shield type rapid hole forming construction method according to claim 1, characterized in that: in the step (4), negative pressure is formed when the hands-free drill is avoided from being too fast, so that the hole wall is shrunk, and the hole forming quality cannot meet the requirement.
5. The shield type rapid hole forming construction method according to claim 1, characterized in that: in the step (6), the surface of the inner wall of the conduit is smooth and has enough strength and rigidity, and the joint of the pipe section is well sealed and convenient to assemble and disassemble.
6. The shield type rapid hole forming construction method according to claim 1, characterized in that: the reverse circulation mud drilling machine system comprises a ground (1), a drilling machine (2), a mud pump (3), a drill rod (4), a drill bit (5), a conveying pipe (6), a mud storage cavity (7), a mud filtering device (8) and a circulating pipe (9);
the top on ground (1) is provided with rig (2), be provided with slush pump (3) in rig (2), the drive end drive drilling rod (4) of rig (2) move down, the input and the drilling rod (4) of slush pump (3) are connected, the bottom of drilling rod (4) is equipped with drill bit (5), the output of slush pump (3) is connected with the one end of conveyer pipe (6), the other end of conveyer pipe (6) extends into storage mud chamber (7) that ground (1) upper surface was seted up, the side of storing up mud chamber (7) is equipped with mud filter equipment (8), the side of mud filter equipment (8) is equipped with the one end of circulating pipe (9), the other end of circulating pipe (9) is located the drill bit (5) and becomes downtheholely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011151722.9A CN112360344A (en) | 2020-10-23 | 2020-10-23 | Shield type rapid hole forming construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011151722.9A CN112360344A (en) | 2020-10-23 | 2020-10-23 | Shield type rapid hole forming construction method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080128172A1 (en) * | 2006-10-26 | 2008-06-05 | Tt Technologies, Inc. | Drill stem connection and method |
| CN203441414U (en) * | 2013-09-13 | 2014-02-19 | 中国海洋石油总公司 | Wide-area overshot |
| CN104120716A (en) * | 2013-04-28 | 2014-10-29 | 杨哲 | Slurry wall protection construction method for bored pile |
| CN110965937A (en) * | 2019-12-31 | 2020-04-07 | 福建建中建设科技有限责任公司 | Double-power whole-course pump suction reverse circulation punching equipment and construction process |
-
2020
- 2020-10-23 CN CN202011151722.9A patent/CN112360344A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080128172A1 (en) * | 2006-10-26 | 2008-06-05 | Tt Technologies, Inc. | Drill stem connection and method |
| CN104120716A (en) * | 2013-04-28 | 2014-10-29 | 杨哲 | Slurry wall protection construction method for bored pile |
| CN203441414U (en) * | 2013-09-13 | 2014-02-19 | 中国海洋石油总公司 | Wide-area overshot |
| CN110965937A (en) * | 2019-12-31 | 2020-04-07 | 福建建中建设科技有限责任公司 | Double-power whole-course pump suction reverse circulation punching equipment and construction process |
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Application publication date: 20210212 |