CN109252514A - Construction method of the high-pressure rotary jet grouting pile in artificial Backfilled Stone Layer - Google Patents
Construction method of the high-pressure rotary jet grouting pile in artificial Backfilled Stone Layer Download PDFInfo
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- CN109252514A CN109252514A CN201710574651.5A CN201710574651A CN109252514A CN 109252514 A CN109252514 A CN 109252514A CN 201710574651 A CN201710574651 A CN 201710574651A CN 109252514 A CN109252514 A CN 109252514A
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- drill bit
- pressure
- hole
- stone layer
- jet grouting
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- 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
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a kind of construction method of high-pressure rotary jet grouting pile in artificial Backfilled Stone Layer, it is smooth that this method carries out site elevation first, surveys fixed pile, while stake machine and background devices are in place；The preparation cement slurry that mobility is small, setting time is short；High spray booth vehicle or outdoor Down-hole rolling rig simultaneously drilling rod in place install air hammer, and drill bit is made to be directed at hole location center；Compressed air is provided by compressed air pump, starts high spray booth vehicle or outdoor Down-hole rolling rig by air hammer pilot hole, stops pilot hole after passing through Backfilled Stone Layer；Air hammer is changed to two-tube drill bit and simultaneously interviews spray, two-tube drill bit band low pressure cement slurry enters pilot hole；To projected depth, it is sent into compressed air and cement slurry, after slurries to be implanted are emerged, is promoted in injection from bottom to top until design height, stops supplying gas and starching, propose two-tube drill bit, complete construction.This method improves rod boring function, avoids equipment damage, reduces construction cost, effectively improves construction efficiency.
Description
Technical field
The present invention relates to a kind of construction method of high-pressure rotary jet grouting pile in artificial Backfilled Stone Layer.
Background technique
With the development of urban construction, coastal cities constantly carry out large-scale marine reclamation land, mostly former in reclaimation area domain
Place belongs to coastal tidal landforms, and the later period carries out extensive artificial sea reclamation, and landfill material is mainly granite block stone composition,
General block stone diameter is 20~80cm, and maximum gauge can exceed that 1m, volume content are about 55~80%, by broken between block stone
Stone, dust and cohesive soil filling, and thickness is uneven, it is loosely organized to slightly close.The pore ground water of artificial Backfilled Stone Layer is the same as week simultaneously
There are certain hydraulic connections for side river and seawater.When carrying out Foundation Pit Construction in such region, high pressure is revolved between support pile
The construction of churning pile water stopping curtain because block stone and underground water there are due to bring constructional difficulties.Conventional high-pressure rotary jet grouting pile rod boring
Function is limited, is suitble to carry out drilling construction in soil layer class, easily leads to equipment damage for artificial Backfilled Stone Layer, raising is constructed into
This, reduces construction efficiency.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of construction method of high-pressure rotary jet grouting pile in artificial Backfilled Stone Layer,
This method overcomes high-pressure rotary jet grouting pile drilling rod to be appropriate only for the defect of soil layer class drilling construction, improves rod boring function, avoids setting
Standby damage, reduces construction cost, effectively improves construction efficiency.
In order to solve the above technical problems, construction method of the high-pressure rotary jet grouting pile of the present invention in artificial Backfilled Stone Layer includes following step
It is rapid:
Step 1: preparation of construction, smooth site elevation is more than 30cm for pile crown height difference to whole pile crowns are exposed, will be overproof
Partial cutaway controls coordinate according to design, and the accurate measurement high-pressure rotary jet grouting pile position in scene is simultaneously marked, and stake machine is in place, and measures
High-pressure rotary jet grouting pile aperture elevation controls stake top absolute altitude, while stake machine backstage high-pressure pump, stirring stock tank and compressed air pump installation are adjusted
Examination is in place；
Step 2: the preparation cement slurry that mobility is small, setting time is short, the stirring resting period of striaght cement slurry, from preparation
It is less than 2.5 hours to the time being finished；
Step 3: drawing hole construction, high spray booth vehicle or outdoor Down-hole rolling rig are in place, and high spray booth vehicle or outdoor Down-hole rolling rig are placed in
Scene is accurately surveyed in the hole location set, is installed air hammer in high spray booth vehicle or outdoor Down-hole rolling rig drilling rod, is made drill bit alignment hole
Position center, and drill rod axis perpendicular alignmnet hole location center；
Step 4: providing compressed air by compressed air pump, starts high spray booth vehicle or outdoor Down-hole rolling rig, pass through air hammer
Pilot hole stops pilot hole after air hammer drill bit passes through Backfilled Stone Layer；
Step 5: jet groutinl, is changed to two-tube rotation for the air hammer that high spray booth vehicle or outdoor Down-hole rolling rig drilling rod are installed
Drill bit is sprayed, two-tube drill bit carries out compressed air, the examination spray of high pressure cement slurry, after ground interview spray is qualified, two-tube rotation on ground
Spray drill bit band low pressure cement slurry enters pilot hole；
Step 6: being sprayed after, to after projected depth, be sent into satisfactory compressed air and cement slurry under two-tube drill bit
1~3min, after slurries to be implanted are emerged, promotion speed as required promotes two-tube drill bit in injection from bottom to top, directly
To design height, stopping is supplied gas and is starched, and proposes two-tube drill bit, completes Construction of High Pressure Jet Grouting Pile.
Further, in the preparation of construction, Pile of High-pressure Spiral Jet position deviation≤50mm of measurement.
Further, the cement material of the cement slurry uses P.O.42.5R ordinary portland cement, the water of cement slurry
Gray scale is 1.5, is additionally incorporated the triethanolamine of 2wt ‰, and mixing time is no less than 180s.
Further, the verticality of the high spray booth vehicle or outdoor Down-hole rolling rig drilling rod and hole location is not more than 1.5%.
Further, the compressed air pump is screw air compressor, 0.7~0. 8MPa of air pressure, capacity be greater than 22 cubes/
min。
Further, the aspirated pressure of the two-tube drill bit is 0.7~0.8MPa, air demand is 1~2m3/ min, water
Slurry body pressure is 28~30MPa, stock volume is 80~120L/min, promotion speed of the two-tube drill bit in mud
It is 5~8cm/min for 4~5cm/min, in the promotion speed of Backfilled Stone Layer, the two-tube drill bit lifting process revolving speed is 5~
8r/min。
Since construction method of the high-pressure rotary jet grouting pile of the present invention in artificial Backfilled Stone Layer uses above-mentioned technical proposal, i.e. this method is first
Preparation of construction is first carried out, site elevation is smooth, surveys fixed pile, while stake machine and background devices are in place；Preparation mobility is small, condenses
Time short cement slurry；High spray booth vehicle or outdoor Down-hole rolling rig are in place, and high spray booth vehicle or outdoor Down-hole rolling rig drilling rod install gas
Dynamic impactor, makes drill bit be directed at hole location center；Compressed air is provided by compressed air pump, starts high spray booth vehicle or outdoor hidden hole drilling
Vehicle stops pilot hole after air hammer drill bit passes through Backfilled Stone Layer by air hammer pilot hole；Air hammer is changed to
Two-tube drill bit simultaneously interviews spray, and two-tube drill bit band low pressure cement slurry enters pilot hole；To projected depth, it is sent into pressure
Contracting air and cement slurry after slurries to be implanted are emerged, promote two-tube drill bit in injection from bottom to top, until design is high
Degree, stopping are supplied gas and are starched, and propose two-tube drill bit, complete Construction of High Pressure Jet Grouting Pile.This method overcomes high-pressure rotary jet grouting pile drilling rod
It is appropriate only for the defect of soil layer class drilling construction, rod boring function is improved, avoids equipment damage, reduce construction cost, have
Effect improves construction efficiency.
Specific embodiment
Construction method of the high-pressure rotary jet grouting pile of the present invention in artificial Backfilled Stone Layer includes the following steps:
Step 1: preparation of construction, smooth site elevation is more than 30cm for pile crown height difference to whole pile crowns are exposed, will be overproof
Partial cutaway controls coordinate according to design, and the accurate measurement high-pressure rotary jet grouting pile position in scene is simultaneously marked, and stake machine is in place, and measures
High-pressure rotary jet grouting pile aperture elevation controls stake top absolute altitude, while stake machine backstage high-pressure pump, stirring stock tank and compressed air pump installation are adjusted
Examination is in place；
Step 2: the preparation cement slurry that mobility is small, setting time is short, to accelerate the condensation of the cement slurry in Backfilled Stone Layer,
The stirring resting period of striaght cement slurry made the time being finished to the utmost by oneself less than 2.5 hours；
Step 3: drawing hole construction, high spray booth vehicle or outdoor Down-hole rolling rig are in place, and high spray booth vehicle or outdoor Down-hole rolling rig are placed in
Scene is accurately surveyed in the hole location set, is installed air hammer in high spray booth vehicle or outdoor Down-hole rolling rig drilling rod, is made drill bit alignment hole
Position center, and drill rod axis perpendicular alignmnet hole location center；
Step 4: providing compressed air by compressed air pump, starts high spray booth vehicle or outdoor Down-hole rolling rig, pass through air hammer
Pilot hole stops pilot hole after air hammer drill bit passes through Backfilled Stone Layer；
Step 5: jet groutinl, is changed to two-tube rotation for the air hammer that high spray booth vehicle or outdoor Down-hole rolling rig drilling rod are installed
Drill bit is sprayed, two-tube drill bit carries out compressed air, the examination spray of high pressure cement slurry, after ground interview spray is qualified, two-tube rotation on ground
Spray drill bit band low pressure cement slurry enters pilot hole；
Step 6: being sprayed after, to after projected depth, be sent into satisfactory compressed air and cement slurry under two-tube drill bit
1~3min, after slurries to be implanted are emerged, promotion speed as required promotes two-tube drill bit in injection from bottom to top, directly
To design height, stopping is supplied gas and is starched, and proposes two-tube drill bit, completes Construction of High Pressure Jet Grouting Pile.
Preferably, in the preparation of construction, Pile of High-pressure Spiral Jet position deviation≤50mm of measurement.
Preferably, the cement material of the cement slurry uses P.O.42.5R ordinary portland cement, the water of cement slurry
Gray scale is 1.5, is additionally incorporated the triethanolamine of 2wt ‰, and mixing time is no less than 180s.
Preferably, the verticality of the high spray booth vehicle or outdoor Down-hole rolling rig drilling rod and hole location is not more than 1.5%.
Preferably, the compressed air pump is screw air compressor, 0.7~0. 8MPa of air pressure, capacity be greater than 22 cubes/
min。
Preferably, the aspirated pressure of the two-tube drill bit is 0.7~0.8MPa, air demand is 1~2m3/ min, water
Slurry body pressure is 28~30MPa, stock volume is 80~120L/min, promotion speed of the two-tube drill bit in mud
It is 5~8cm/min for 4~5cm/min, in the promotion speed of Backfilled Stone Layer, the two-tube drill bit lifting process revolving speed is 5~
8r/min。
The revolving speed of cement slurry blender and the ability of mixing and stirring should be adapted with the plasma discharge amount of high-pressure injection pump in this method, and
Should ensure that uniformly, continuously mixing slurries, guarantee the continuous for starching demand of high pressure jet grouting.Drilling machine installation is positioned to standard
Really, horizontal, firm, to guarantee that drilling reaches the verticality of design requirement, level correction must be made after drilling machine is in place.Jet grouting mistake
Cheng Zhong, operating personnel must check whether the construction parameters such as flow, tolerance, pressure and the promotion speed of slip casting meet the moment and set
Meter requires, and makes a record at any time.It should be noted that slurry situation is returned on ground when jet groutinl in Backfilled Stone Layer, if ground is without emitting
Slurry or leakage amount are few, should reduce promotion speed, so that cement slurry can be sufficient filling with gap between block stone, guarantee sealing curtain
The construction effect of curtain.To solve to occur depressed phenomenon because of bleed at the top of concrement, whenever AEI After End of Injection, immediately in spray-hole
Interior progress static pressure filling grouting, until aperture liquid level no longer sinks.It, should be timely after being ejected into design height construction
Each flushing of pipeline is clean, must not there are residues, with anti-clogging.
This method for high spray booth vehicle or outdoor Down-hole rolling rig can not voluntarily drilling construction region of rockfilling, by using gas
Dynamic impactor pore-forming carries out Construction of High Pressure Jet Grouting Pile after passing through Backfilled Stone Layer, then using two-tube drill bit, is suitable for artificial
Extensive sea reclamation region carries out Construction of High Pressure Jet Grouting Pile, and especially there are the artificial Backfilled Stone Layers of larger thickness, block stone for solution
The construction problem of high-pressure rotary jet grouting pile pore-forming is carried out in layer.
Claims (6)
1. a kind of construction method of high-pressure rotary jet grouting pile in artificial Backfilled Stone Layer, it is characterised in that this method includes the following steps:
Step 1: preparation of construction, smooth site elevation is more than 30cm for pile crown height difference to whole pile crowns are exposed, will be overproof
Partial cutaway controls coordinate according to design, and the accurate measurement high-pressure rotary jet grouting pile position in scene is simultaneously marked, and stake machine is in place, and measures
High-pressure rotary jet grouting pile aperture elevation controls stake top absolute altitude, while stake machine backstage high-pressure pump, stirring stock tank and compressed air pump installation are adjusted
Examination is in place；
Step 2: the preparation cement slurry that mobility is small, setting time is short, the stirring resting period of striaght cement slurry, from preparation
It is less than 2.5 hours to the time being finished；
Step 3: drawing hole construction, high spray booth vehicle or outdoor Down-hole rolling rig are in place, and high spray booth vehicle or outdoor Down-hole rolling rig are placed in
Scene is accurately surveyed in the hole location set, is installed air hammer in high spray booth vehicle or outdoor Down-hole rolling rig drilling rod, is made drill bit alignment hole
Position center, and drill rod axis perpendicular alignmnet hole location center；
Step 4: providing compressed air by compressed air pump, starts high spray booth vehicle or outdoor Down-hole rolling rig, pass through air hammer
Pilot hole stops pilot hole after air hammer drill bit passes through Backfilled Stone Layer；
Step 5: jet groutinl, is changed to two-tube rotation for the air hammer that high spray booth vehicle or outdoor Down-hole rolling rig drilling rod are installed
Drill bit is sprayed, two-tube drill bit carries out compressed air, the examination spray of high pressure cement slurry, after ground interview spray is qualified, two-tube rotation on ground
Spray drill bit band low pressure cement slurry enters pilot hole；
Step 6: being sprayed after, to after projected depth, be sent into satisfactory compressed air and cement slurry under two-tube drill bit
1~3min, after slurries to be implanted are emerged, promotion speed as required promotes two-tube drill bit in injection from bottom to top, directly
To design height, stopping is supplied gas and is starched, and proposes two-tube drill bit, completes Construction of High Pressure Jet Grouting Pile.
2. construction method of the high-pressure rotary jet grouting pile according to claim 1 in artificial Backfilled Stone Layer, it is characterised in that: described to apply
During working drawing is standby, Pile of High-pressure Spiral Jet position deviation≤50mm of measurement.
3. construction method of the high-pressure rotary jet grouting pile according to claim 1 in artificial Backfilled Stone Layer, it is characterised in that: the water
The cement material of slurry body uses P.O.42.5R ordinary portland cement, and the ratio of mud of cement slurry is 1.5, is additionally incorporated
The triethanolamine of 2wt ‰, and mixing time is no less than 180s.
4. construction method of the high-pressure rotary jet grouting pile according to claim 1 in artificial Backfilled Stone Layer, it is characterised in that: the height
The verticality of spray booth vehicle or outdoor Down-hole rolling rig drilling rod and hole location is not more than 1.5%.
5. construction method of the high-pressure rotary jet grouting pile according to claim 1 in artificial Backfilled Stone Layer, it is characterised in that: the pressure
Contracting air pump is screw air compressor, and 0.7~0. 8MPa of air pressure, capacity is greater than 22 cubes/min.
6. construction method of the high-pressure rotary jet grouting pile according to claim 1 in artificial Backfilled Stone Layer, it is characterised in that: described double
The aspirated pressure of pipe drill bit is 0.7~0.8MPa, air demand is 1~2m3/ min, cement slurry pressure be 28~30MPa,
Stock volume is 80~120L/min, and the two-tube drill bit is 4~5cm/min, in Backfilled Stone Layer in the promotion speed of mud
Promotion speed be 5~8cm/min, the two-tube drill bit lifting process revolving speed be 5~8r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574651.5A CN109252514A (en) | 2017-07-14 | 2017-07-14 | Construction method of the high-pressure rotary jet grouting pile in artificial Backfilled Stone Layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574651.5A CN109252514A (en) | 2017-07-14 | 2017-07-14 | Construction method of the high-pressure rotary jet grouting pile in artificial Backfilled Stone Layer |
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| Publication Number | Publication Date |
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| CN109252514A true CN109252514A (en) | 2019-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710574651.5A Pending CN109252514A (en) | 2017-07-14 | 2017-07-14 | Construction method of the high-pressure rotary jet grouting pile in artificial Backfilled Stone Layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114352189A (en) * | 2022-01-07 | 2022-04-15 | 中铁二十局集团第六工程有限公司 | Construction method of jet grouting pile |
| CN114541375A (en) * | 2022-03-02 | 2022-05-27 | 广东水电二局股份有限公司 | Construction method of double-pipe jet grouting pile |
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| CN106320331A (en) * | 2016-09-23 | 2017-01-11 | 中交第航务工程局有限公司 | Construction method for penetrating block stone layer of pore-forming system of high-pressure jet grouting pile |
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2017
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104631470A (en) * | 2014-12-26 | 2015-05-20 | 合肥建工集团有限公司 | Deep foundation pit combination retaining and protecting construction method for geology with high water level and large particle size sand gravel |
| CN106320331A (en) * | 2016-09-23 | 2017-01-11 | 中交第航务工程局有限公司 | Construction method for penetrating block stone layer of pore-forming system of high-pressure jet grouting pile |
| CN107338789A (en) * | 2016-12-28 | 2017-11-10 | 福建建工集团有限责任公司 | A kind of construction method of down-the-hole percussion triple-pipe high pressure jet grouting stake |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114352189A (en) * | 2022-01-07 | 2022-04-15 | 中铁二十局集团第六工程有限公司 | Construction method of jet grouting pile |
| CN114352189B (en) * | 2022-01-07 | 2024-03-15 | 中铁二十局集团第六工程有限公司 | Construction method of jet grouting pile |
| CN114541375A (en) * | 2022-03-02 | 2022-05-27 | 广东水电二局股份有限公司 | Construction method of double-pipe jet grouting pile |
| CN114541375B (en) * | 2022-03-02 | 2023-08-11 | 广东水电二局股份有限公司 | Construction method of double-pipe jet grouting pile |
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Application publication date: 20190122 |