CN105862860A - Remanufacturing and constructing method of covering layer at deep water region where steel pile casings are tapped - Google Patents
Remanufacturing and constructing method of covering layer at deep water region where steel pile casings are tapped Download PDFInfo
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- CN105862860A CN105862860A CN201610222400.6A CN201610222400A CN105862860A CN 105862860 A CN105862860 A CN 105862860A CN 201610222400 A CN201610222400 A CN 201610222400A CN 105862860 A CN105862860 A CN 105862860A
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- jet grouting
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- rotary jet
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
-
- 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
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
-
- 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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/40—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds in open water
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0061—Production methods for working underwater
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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)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a remanufacturing and constructing method of a covering layer at a deep water region where steel pile casings are tapped. The remanufacturing and constructing method comprises the following steps of (1) putting sand bags; (2) guiding holes; (3) enabling a jet apparatus and a spray rod to extend; (4) performing rotary jet grouting; (5) lifting rotary jet to a predetermined height; (6) forming a first rotary jet grouting pile curtain layer; and (7) forming a second rotary jet grouting pile curtain layer, wherein rotary jet grouting piles of the first rotary jet grouting pile curtain layer and the second rotary jet grouting pile curtain layer are closely bonded to form a curtain ring layer. According to the constructing method, a manner of manually filling the sand bags to increase the buried depth of the steel pile casings and increase the curtain ring layers of the high-pressure rotary jet grouting curtains so as to reinforce and remanufacture the covering layer is adopted, so that the stability of the steel pile casings underwater is guaranteed; besides, the method is simple to operate and good in economic benefits, and the popularization and the application of a technique are facilitated.
Description
Technical field
The present invention relates to profundal zone construction technology, a kind of reproduce for the cover layer squeezing into steel pile casting in profundal zone
Construction method.
Background technology
Cover layer refers to the covering loosely-packed of the various origin causes of formation on basement rock, deposit, such as sand gravel stratum, sand
Layer and the rubble soil body etc. manually filled.And large diameter borehole pile driving construction at sea runs into the several of intectate or shallow overburden
Rate is very big, causes occurring during the situation that steel pile casting cannot be squeezed into or driving depth is inadequate, causes and leaks at the bottom of steel pile casting unstability or casing
The phenomenons such as slurry have a strong impact on pile foundation construction hole quality and efficiency.If steel pile casting cannot squeeze into basement rock in construction, bore hammer and enter
After fine sand layer, it is susceptible to perforation and connects with sea water, cause work progress pore-forming difficulty.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention provides a kind of and squeezes into the cover layer of steel pile casting again in profundal zone
Make construction method.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of reproduce construction method for the cover layer squeezing into steel pile casting in profundal zone, comprise the following steps:
1), after true fixed pile, hole is drawn to projected depth by drawing drilling machine rig at pre-fixed pile；
2) remove and draw drilling machine, and extend downwardly into ejector, spray boom at the bottom of hole by jet drill rig, connect air deflector；
3) rotary jet grouting is carried out from bottom to top；
4) by predetermined pressure, speed churning is promoted to designing at the desired height position of top, stake position；
5) completing a stake position churning job and form rotary churning pile, the churning that telephone-moving carries out another position to another churning position is executed
Work, the rotary churning pile completed becomes a circle to form the first curtain with rotary jet grouting piles layer around steel pile casting position；
6) periphery at the first curtain with rotary jet grouting piles layer proceeds to design stake position rotary-spraying construction, and the rotary churning pile completed is around the first rotation
Spray stake curtain layer position becomes a circle to form the second curtain with rotary jet grouting piles layer, described first curtain with rotary jet grouting piles layer and the second curtain with rotary jet grouting piles
Tight cementing formation curtain ring layer between each stake of rotary churning pile of layer；
7) throw in sand pocket and form sand pocket cover layer.
As a preference, in described step 5), churning promotes speed 15～18cm/min.
As a preference, described step 1) sand pocket in use sea sand.
As a preference, in described step 4), the pump pressure of rotary jet grouting process is 20～32Mpa, rotating speed be 700～
900r/min。
As a preference, in described step 4), the whitewashed liquid of rotary jet grouting process is cement mortar, water mixed serum.
As a preference, in described step 4), in the whitewashed liquid of rotary jet grouting process, cement mortar, the ratio of mud of water are
1:1。
As a preference, the slurry flow 70～90L/min of rotary jet grouting process in described step 4).
As a preference, outside each rotary churning pile centre-to-centre spacing steel pile casting of the first curtain with rotary jet grouting piles layer in step 6)
0.10～0.20m, it is evenly arranged along steel pile casting periphery by each rotary churning pile centre-to-centre spacing 0.3～0.5m.
As a preference, outside each rotary churning pile centre-to-centre spacing steel pile casting of the second curtain with rotary jet grouting piles layer in step 6)
0.50～0.60m, it is evenly arranged along the first curtain with rotary jet grouting piles layer periphery by each rotary churning pile centre-to-centre spacing 0.3～0.5m.
As a preference, described step 5) churning process aperture before final set at mend slurry in time to eliminate serosity
Shrink sinking situation.
The invention has the beneficial effects as follows: this construction method uses manually fills sand pocket increasing steel pile casting buried depth and high-pressure rotary-spray
Grouting curtain curtain ring layer carries out reinforcing the mode reproducing cover layer, it is ensured that the underwater steadiness of steel pile casting, and method behaviour
Making simple, economic benefit is good, the beneficially popularization and application of technology.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the rotary churning pile distribution schematic diagram in the present invention；
Fig. 2 is the jet grouting pile construction schematic diagram in the present invention.
Detailed description of the invention
In order to make the purpose of the application, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.For the thorough explanation present invention, following description can relate to some certain detail
Joint.And when not having these specific detail, the present invention then may still can realize, i.e. technical staff in art uses herein
These describe and statement others skilled in the art in art effectively introduce their work essence.Should be appreciated that
Specific embodiment described herein, only in order to explain the application, is not used to limit real protection scope.And for avoiding mixing
Confuse the purpose of the present invention, owing to other technology known is not it will be understood that therefore they are described in detail.With reference to figure
1, a kind of of Fig. 2 reproduces construction method for the cover layer squeezing into steel pile casting in profundal zone, comprises the following steps:
1) really hole is drawn to projected depth by drawing drilling machine rig at pre-fixed pile after fixed pile；
2) remove and draw drilling machine, and extend downwardly into ejector, spray boom at the bottom of hole by jet drill rig, connect air deflector；
3) rotary jet grouting is carried out from bottom to top；
4) by predetermined pressure, speed churning is promoted to designing at the desired height position of top, stake position；
5) completing a stake position churning job and form rotary churning pile 1, telephone-moving carries out the churning of another position to another churning position
Construction, the rotary churning pile 1 completed becomes a circle to form the first curtain with rotary jet grouting piles layer 3 around steel pile casting 2 position；
6) periphery at the first curtain with rotary jet grouting piles layer proceeds to design stake position rotary-spraying construction, and the rotary churning pile 1 completed is around first
Curtain with rotary jet grouting piles layer 3 position becomes a circle to form the second curtain with rotary jet grouting piles layer 4, described first curtain with rotary jet grouting piles layer 3 and the second churning
Tight cementing formation curtain ring layer between each stake of rotary churning pile of stake curtain layer 4；
7) throw in sand pocket and form sand pocket cover layer 5.
The really employing of this construction method is manually filled sand pocket increasing steel pile casting buried depth and is tied mutually with high pressure jet grouting curtain
Close and carry out reinforcing the process reproducing cover layer, it is desirable to this cover layer construction technology and the supporting enforcement of high pressure jet grouting curtain.?
Before construction, to first carry out the survey of stake position and set with true fixed pile position, specifically include, 1. surveying setting-out: executing according to design working drawing
Construction axis released by work platform；2. determine position, hole: determine churning stake holes position with axis of constructing and be numbered with pile No., Kong Hao, sequence number, survey
Measure each aperture elevation.
Boring procedure can use diameter Ф 91mm drilling tool perforate, uses premium mud retaining wall to creep into, and drilling depth to reach
Design requirement, the core barrel length of use should be greater than 2.5m, it is not recommended that uses three-wing bit to draw hole drill and enters.Once rig is in place,
Rig main drilling rod alignment position, hole, measures organism level, vertical shaft vertically with horizon rule, and rig to be leveled up steady firm.Want light during boring
Press, bore slowly, carry more, it is ensured that become hole perpendicularity.Boring bore should be greater than playpipe external diameter 50mm, normally returns during to ensure injection
Slurry, grout.
High-pressure rotary jet grouting pile can use interval to jump the construction of stake method.Boring procedure once has a large amount of spillage or collapse hole, it is impossible to toward hole
Inside add drilling rod, it is difficult to when down creeping into, layer and section from top to bottom can be taked successively to whitewash, drill after whitewashing 6～8 hours
Rotary churning pile cement induration, continues down drilling construction.
High-pressure rotary jet grouting pile is to utilize high-pressure pump that cement grout is passed through the special shower nozzle of drilling rod termination, sprays into high speed level
The soil body, by the impulsive force cutting coating of liquid, drilling rod one side rotates with certain speed simultaneously, and a low speed promotes slowly,
Make the soil body and mud be thoroughly mixed solidification, form the cylinder induration with some strength, i.e. rotary churning pile 1, so that ground
Base is reinforced.This programme Construction of High Pressure Jet Grouting Pile can use substance tube method.The pump pressure of rotary jet grouting process in described step 3)
Being 20～32Mpa, rotating speed is 700～900r/min, to ensure taking into account of efficiency of construction and construction effect.Described step 3) is revolved
The whitewashed liquid of preventing slurry injection process is cement mortar, water mixed serum, for example with P.O42.5 level Portland cement, it is ensured that execute
Work efficiency fruit, as preference, in described step 3), in the whitewashed liquid of rotary jet grouting process, cement mortar, the ratio of mud of water are 1:1, protect
Card rotary churning pile 1 is sufficiently solid.The slurry flow 70～90L/min of rotary jet grouting process in described step 3), it is ensured that rotary jet grouting
The efficiency of process.In described step 4), churning promotes speed 15～18cm/min, it is ensured that churning is fully enough to ensure rotary churning pile 1
Firm.
Owing to rotary churning pile requires that geological condition has a preferable coefficient of permeability, therefore it is preferred that, described step 7)
Sand pocket in use sea sand, as the backfilling material of man cover layer, utilize sea sand to have the characteristic of good water penetration.Throw in
Slack period should be selected in reduce the turbulent water impact for sand pocket placement position as far as possible during sand pocket.Sand pocket can after throwing in
Sending diver to detect under water and determine whether man cover layer reaches requirement, if defective part, diver accuses to technician
Know particular location in place of defect, platform continues to throwing in sand pocket at this.
It is exactly to arrange that in the outside of steel pile casting 2 two-layer high-pressure rotary jet grouting pile forms curtain, in step 5) in fact that cover layer reproduces
Each rotary churning pile 1 centre-to-centre spacing steel pile casting of the first curtain with rotary jet grouting piles layer 3 outside 0.10～0.20m, by each rotary churning pile 1 centre-to-centre spacing
0.3～0.5m is evenly arranged along steel pile casting 2 periphery, to ensure the intensity of the first curtain with rotary jet grouting piles layer 3.The second rotation in step 6)
Outside spray each rotary churning pile centre-to-centre spacing steel pile casting 2 of stake curtain layer 4 0.50～0.60m, by each rotary churning pile 1 centre-to-centre spacing 0.3～
0.5m is evenly arranged along the first curtain with rotary jet grouting piles layer 3 periphery, with the intensity of the second curtain with rotary jet grouting piles layer 4.First curtain with rotary jet grouting piles
Tight cementing formation curtain ring layer between layer 3 and the second curtain with rotary jet grouting piles layer 4 each stake of two-layer high-pressure rotary jet grouting pile, forms thickness at stake
The degree protective layer not less than 1m, protective layer intensity is not less than 4Mpa.After additionally the construction of two-layer curtain with rotary jet grouting piles terminates, site operation
In can draw, according to curtain boring, the practical situation understood in hole and effect that curtain produces be analyzed after decide whether to increase by the again
Three layers of curtain are constructed or increase a small amount of rotary churning pile 1 for local defective region.
After completing due to the high pressure jet grouting in each hole, the serosity in hole quickly can produce bleed precipitation, therefore, institute
State step 4) churning process aperture before final set at mend slurry in time and shrink sinking situation to eliminate serosity, i.e. should be in time to hole
Interior filling is in the milk, until full, till slurry face, aperture no longer sinks.Eventually after spray, filling grouting is a very important job,
That recharges good and bad will directly affect the quality of engineering, it is necessary to carries out filling and recharges work, specifically can include, 1. by feed pipe for mortar
Inserting below entoplasm face, hole 2m, serosity during input slip casting carries out filling grouting；2. filling grouting need to repeatedly be repeated,
The standard of recharging is: until full, till slurry face, aperture no longer sinks；3. should record the time of recharging, number of times, grouting amount, cement use
Measure and recharge quality.After the high pressure jet grouting in hole, each position completes, grouting pump and grout pipe line should be cleaned in time, prevent clear
Wash the most not thorough serosity deposit clumps in grout pipe line, blocking grout pipe line and nozzle, affect the construction in next hole.
Embodiment 1
" embodiment " the most referred to herein refers to special characteristic, the structure that may be included at least one implementation of the application
Or characteristic.Different in this manual local " in the embodiments " occurred not refer both to same embodiment, are not single
Or the embodiment the most mutually exclusive with other embodiments.Embodiment includes that the one with reference to Fig. 1, Fig. 2 is at deep water
District squeezes into the cover layer of steel pile casting and reproduces construction method, comprises the following steps:
1) really hole is drawn to projected depth by drawing drilling machine rig at pre-fixed pile after fixed pile；
2) remove and draw drilling machine, and extend downwardly into ejector, spray boom at the bottom of hole by jet drill rig, connect air deflector；
3) carrying out rotary jet grouting from bottom to top, the whitewashed liquid of rotary jet grouting process is cement mortar, water mixed serum, cement in serosity
Slurry, the ratio of mud of water are 1:1, the slurry flow 70L/min of rotary jet grouting process, are pumped as 20Mpa, and rotating speed is 700r/min；
4), at by predetermined pressure, lifting speed churning to design top, stake position desired height position, churning promotes speed 15cm/
Min, mends slurry in time and shrinks sinking situation to eliminate serosity at the aperture before final set；
5) completing a stake position churning job and form rotary churning pile 1, telephone-moving carries out the churning of another position to another churning position
Construction, the rotary churning pile 1 completed becomes a circle to form the first curtain with rotary jet grouting piles layer 3, described first rotary churning pile curtain around steel pile casting 2 position
0.10m outside curtain each rotary churning pile 1 centre-to-centre spacing steel pile casting of layer 3, equal along steel pile casting 2 periphery by each rotary churning pile 1 centre-to-centre spacing 0.3m
Even layout；
6) periphery at the first curtain with rotary jet grouting piles layer proceeds to design stake position rotary-spraying construction, and the rotary churning pile 1 completed is around first
Curtain with rotary jet grouting piles layer 3 position becomes a circle to form the second curtain with rotary jet grouting piles layer 4, described second each rotary churning pile of curtain with rotary jet grouting piles layer 4
0.50m outside centre-to-centre spacing steel pile casting 2, by each rotary churning pile 1 centre-to-centre spacing 0.3m along the first curtain with rotary jet grouting piles layer 3 uniform cloth of periphery
Put, tight cementing formation curtain circle between described first curtain with rotary jet grouting piles layer 3 and each stake of rotary churning pile of the second curtain with rotary jet grouting piles layer 4
Layer；
7) throw in sand pocket formed sand pocket cover layer 5, step 7) sand pocket in use sea sand.
Embodiment 2
A kind of with reference to Fig. 1, Fig. 2 reproduces construction method for the cover layer squeezing into steel pile casting in profundal zone, comprises the following steps:
1) really hole is drawn to projected depth by drawing drilling machine rig at pre-fixed pile after fixed pile；
2) remove and draw drilling machine, and extend downwardly into ejector, spray boom at the bottom of hole by jet drill rig, connect air deflector；
3) carrying out rotary jet grouting from bottom to top, the whitewashed liquid of rotary jet grouting process is cement mortar, water mixed serum, cement in serosity
Slurry, the ratio of mud of water are 1:1, the slurry flow 80L/min of rotary jet grouting process, are pumped as 26Mpa, and rotating speed is 800r/min；
4), at by predetermined pressure, lifting speed churning to design top, stake position desired height position, churning promotes speed 16cm/
Min, mends slurry in time and shrinks sinking situation to eliminate serosity at the aperture before final set；
5) completing a stake position churning job and form rotary churning pile 1, telephone-moving carries out the churning of another position to another churning position
Construction, the rotary churning pile 1 completed becomes a circle to form the first curtain with rotary jet grouting piles layer 3, described first rotary churning pile curtain around steel pile casting 2 position
0.15m outside curtain each rotary churning pile 1 centre-to-centre spacing steel pile casting of layer 3, equal along steel pile casting 2 periphery by each rotary churning pile 1 centre-to-centre spacing 0.4m
Even layout；
6) periphery at the first curtain with rotary jet grouting piles layer proceeds to design stake position rotary-spraying construction, and the rotary churning pile 1 completed is around first
Curtain with rotary jet grouting piles layer 3 position becomes a circle to form the second curtain with rotary jet grouting piles layer 4, described second each rotary churning pile of curtain with rotary jet grouting piles layer 4
0.55m outside centre-to-centre spacing steel pile casting 2, by each rotary churning pile 1 centre-to-centre spacing 0.4m along the first curtain with rotary jet grouting piles layer 3 uniform cloth of periphery
Put, tight cementing formation curtain circle between described first curtain with rotary jet grouting piles layer 3 and each stake of rotary churning pile of the second curtain with rotary jet grouting piles layer 4
Layer；
7) throw in sand pocket formed sand pocket cover layer 5, step 7) sand pocket in use sea sand.
Embodiment 3
A kind of with reference to Fig. 1, Fig. 2 reproduces construction method for the cover layer squeezing into steel pile casting in profundal zone, comprises the following steps:
1) really hole is drawn to projected depth by drawing drilling machine rig at pre-fixed pile after fixed pile；
2) remove and draw drilling machine, and extend downwardly into ejector, spray boom at the bottom of hole by jet drill rig, connect air deflector；
3) carrying out rotary jet grouting from bottom to top, the whitewashed liquid of rotary jet grouting process is cement mortar, water mixed serum, cement in serosity
Slurry, the ratio of mud of water are 1:1, the slurry flow 90L/min of rotary jet grouting process, are pumped as 32Mpa, and rotating speed is 900r/min；
4), at by predetermined pressure, lifting speed churning to design top, stake position desired height position, churning promotes speed 18cm/
Min, mends slurry in time and shrinks sinking situation to eliminate serosity at the aperture before final set；
5) completing a stake position churning job and form rotary churning pile 1, telephone-moving carries out the churning of another position to another churning position
Construction, the rotary churning pile 1 completed becomes a circle to form the first curtain with rotary jet grouting piles layer 3, described first rotary churning pile curtain around steel pile casting 2 position
0.20m outside curtain each rotary churning pile 1 centre-to-centre spacing steel pile casting of layer 3, equal along steel pile casting 2 periphery by each rotary churning pile 1 centre-to-centre spacing 0.5m
Even layout；
6) periphery at the first curtain with rotary jet grouting piles layer proceeds to design stake position rotary-spraying construction, and the rotary churning pile 1 completed is around first
Curtain with rotary jet grouting piles layer 3 position becomes a circle to form the second curtain with rotary jet grouting piles layer 4, described second each rotary churning pile of curtain with rotary jet grouting piles layer 4
0.60m outside centre-to-centre spacing steel pile casting 2, by each rotary churning pile 1 centre-to-centre spacing 0.5m along the first curtain with rotary jet grouting piles layer 3 uniform cloth of periphery
Put, tight cementing formation curtain circle between described first curtain with rotary jet grouting piles layer 3 and each stake of rotary churning pile of the second curtain with rotary jet grouting piles layer 4
Layer；
7) throw in sand pocket formed sand pocket cover layer 5, step 7) sand pocket in use sea sand.
According to above-mentioned principle, the present invention can also carry out suitable change and amendment to above-mentioned embodiment.Therefore, this
Bright it is not limited to detailed description of the invention disclosed and described above, some modifications and changes of the present invention be should also be as falling into this
In the scope of the claims of invention.
Through it was verified that the man cover layer method of sand pocket is filled in curtain grouting anchoring, by practice, it was demonstrated that
Method is feasible, is possible not only to effective consolidation pile primitive period and encloses unfavorable geology, solve under severe sea condition and complex geological condition over strait greatly
The couch collapse hole that occurs in bridge pier base boring procedure, the difficult problem such as spillage, be greatly improved offshore pile pore-forming efficiency and quality, and relatively
The conventional treatment process that in Yu Kong, throwing slabstone, cement, loess etc. process repeatedly and effect is not satisfactory, single stake at least saves
About 15 days durations.
Claims (10)
1. one kind is reproduced construction method for the cover layer squeezing into steel pile casting in profundal zone, it is characterised in that comprise the following steps:
1) really hole is drawn to projected depth by drawing drilling machine rig at pre-fixed pile after fixed pile；
2) remove and draw drilling machine, and extend downwardly into ejector, spray boom at the bottom of hole by jet drill rig, connect air deflector；
3) rotary jet grouting is carried out from bottom to top；
4) by predetermined pressure, speed churning is promoted to designing at the desired height position of top, stake position；
5) completing a stake position churning job and form rotary churning pile (1), telephone-moving carries out the rotation of another position to another churning position
Spraying construction, the rotary churning pile completed (1) becomes a circle to form the first curtain with rotary jet grouting piles layer (3) around steel pile casting (2) position；
6) periphery at the first curtain with rotary jet grouting piles layer proceeds to design stake position rotary-spraying construction, and the rotary churning pile completed (1) is around the
One curtain with rotary jet grouting piles layer (3) position become one circle formed the second curtain with rotary jet grouting piles layer (4), described first curtain with rotary jet grouting piles layer (3) and
Tight cementing formation curtain ring layer between each stake of rotary churning pile of the second curtain with rotary jet grouting piles layer (4)；
7) throw in sand pocket and form sand pocket cover layer (5).
The most according to claim 1 a kind of reproducing construction method for the cover layer squeezing into steel pile casting in profundal zone, it is special
Levy and be: in described step 4), churning promotes speed 15～18cm/min.
The most according to claim 1 a kind of reproducing construction method for the cover layer squeezing into steel pile casting in profundal zone, it is special
Levy and be: described step 7) sand pocket in use sea sand.
The most according to claim 1 a kind of reproducing construction method for the cover layer squeezing into steel pile casting in profundal zone, it is special
Levying and be: in described step 3), the pump pressure of rotary jet grouting process is 20～32Mpa, rotating speed is 700～900r/min.
The most according to claim 1 a kind of reproducing construction method for the cover layer squeezing into steel pile casting in profundal zone, it is special
Levy and be: in described step 3), the whitewashed liquid of rotary jet grouting process is cement mortar, water mixed serum.
The most according to claim 5 a kind of reproducing construction method for the cover layer squeezing into steel pile casting in profundal zone, it is special
Levy and be: in described step 3), in the whitewashed liquid of rotary jet grouting process, cement mortar, the ratio of mud of water are 1:1.
The most according to claim 5 a kind of reproducing construction method for the cover layer squeezing into steel pile casting in profundal zone, it is special
Levy and be: the slurry flow 70～90L/min of rotary jet grouting process in described step 3).
The most according to claim 1 a kind of reproducing construction method for the cover layer squeezing into steel pile casting in profundal zone, it is special
Levy and be: outside the first curtain with rotary jet grouting piles layer (3) each rotary churning pile (1) centre-to-centre spacing steel pile casting in step 5) 0.10～0.20m,
It is evenly arranged along steel pile casting (2) periphery by each rotary churning pile (1) centre-to-centre spacing 0.3～0.5m.
The most according to claim 1 a kind of reproducing construction method for the cover layer squeezing into steel pile casting in profundal zone, it is special
Levy and be: each rotary churning pile centre-to-centre spacing steel pile casting (2) outside 0.50～0.60m of the second curtain with rotary jet grouting piles layer (4) in step 6),
It is evenly arranged along the first curtain with rotary jet grouting piles layer (3) periphery by each rotary churning pile (1) centre-to-centre spacing 0.3～0.5m.
The most according to claim 1 a kind of reproducing construction method for the cover layer squeezing into steel pile casting in profundal zone, it is special
Levy and be: described step 4) churning process aperture before final set at mend slurry in time and shrink sinking situation to eliminate serosity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610222400.6A CN105862860A (en) | 2016-04-11 | 2016-04-11 | Remanufacturing and constructing method of covering layer at deep water region where steel pile casings are tapped |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610222400.6A CN105862860A (en) | 2016-04-11 | 2016-04-11 | Remanufacturing and constructing method of covering layer at deep water region where steel pile casings are tapped |
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| Publication Number | Publication Date |
|---|---|
| CN105862860A true CN105862860A (en) | 2016-08-17 |
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| CN201610222400.6A Pending CN105862860A (en) | 2016-04-11 | 2016-04-11 | Remanufacturing and constructing method of covering layer at deep water region where steel pile casings are tapped |
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| Country | Link |
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Application publication date: 20160817 |