CN107327314A - Super thick backfills layer pile base construction method - Google Patents
Super thick backfills layer pile base construction method Download PDFInfo
- Publication number
- CN107327314A CN107327314A CN201710443680.8A CN201710443680A CN107327314A CN 107327314 A CN107327314 A CN 107327314A CN 201710443680 A CN201710443680 A CN 201710443680A CN 107327314 A CN107327314 A CN 107327314A
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- China
- Prior art keywords
- steel pipe
- pipe casing
- super thick
- backfill
- mud
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
Abstract
Layer pile base construction method is backfilled the present invention relates to a kind of super thick, it comprises the following steps：The foundation ditch excavated on layer for burying steel pipe casing is backfilled in super thick using machinery, the depth of foundation ditch is more than 5 meters；It is more than 500mm block stone in backfill material containing particle diameter, returns more than lift thickness 11m；Argillic horizon is inserted in the bottom of foundation ditch, then vertically sets steel pipe casing in foundation ditch, the thickness of argillic horizon is more than 500mm；The top of steel pipe casing after backfill will basset；Mud is prepared using clay and water stirring, mud balance is more than 1.35；By in the slurry prime of preparation to steel pipe casing, mud is allowed to fill steel pipe casing；The backfill layer in steel pipe casing, mud off pore-forming are hammered using Driven Piles.The purpose is to provide one kind to improve super thick backfill layer pile foundation hole quality, make super thick backfill layer pile foundation pore-forming more convenient, efficient and quick, and then the construction period can be shortened, the super thick backfill layer pile base construction method of reduction construction cost.
Description
Technical field
Layer pile base construction method is backfilled the present invention relates to a kind of super thick.
Background technology
Coastal area forms the project of land-based area using backfill of cutting into a mountain, and it, which is backfilled in material, has more large-size rock fragment, field
Ground backfills Rotating fields relative loose without heavy tamping treatment；Formal sea wall is not formed typically when marine site is backfilled, and sea tidal level is to place
Effect of Underground Water Level is obvious；Some projects are relatively low due to former marine site base elevation, need to backfill a large amount of quarrel soil that cut into a mountain, form super thick
Backfill layer；Above mentioned problem causes many adverse effects to project construction construction, particularly pile foundation construction, causes pile foundation hole wall to collapse
Collapse, aperture is excessive, necking down, slurry coat method are lost in, stake machine be the problems such as can not normally creep into, and causes irremediable to construction quality
Harm.
The pile foundation construction of layer is backfilled for super thick, method more common at present mainly includes：
1st, Driven Piles pore-forming
Pore-forming is hammered using jump bit, using high specific gravity mud formation wall of hole, so as to penetrate backfill layer pore-forming；This work
Skill advantage：It is low to site requirements without large scale equipment input, vibrate small；Shortcoming：Long construction period, level of ground water to retaining wall into
Type influence is larger.
2nd, hammering is added to penetrate backfill layer using all steel casing
Using interior external mold form of tubes, internal mold pipe hammering is penetrated backfill layer, external mold pipe while through thickness by large-scale Driven Piles machine
Follow and taken out after sinking, pore-forming after internal mold pipe, pile using vibration mode taking-up external mold pipe.The technological advantage：Steel pipe can have enough to meet the need,
Speed of application is fast；Shortcoming：Heavy mechanical equipment is needed to be constructed, it is high to site requirements；Very noisy, vibration is big, and construction is also easy to produce
Soil compaction effect；Cost is higher.
The content of the invention
It is an object of the invention to provide one kind can improve super thick backfill layer pile foundation hole quality, make super thick backfill layer pile foundation into
Hole is more convenient, efficient and quick, and then can shorten the construction period, the super thick backfill layer pile foundation construction side of reduction construction cost
Method.
The super thick backfill layer pile base construction method of the present invention, it comprises the following steps：
A, backfilled using machinery in super thick and foundation ditch for burying steel pipe casing is excavated on layer, the depth of foundation ditch is more than 5 meters；
The super thick backfill layer refers to place close to sea wall, and the backfill of cutting into a mountain that place surface water is influenceed by sea tidal level is formed
Place, place do not carry out heavy tamping treatment, and backfill layer is closely knit by natural subsidence, internal structure relative loose；Contain in backfill material
There is the block stone that particle diameter is more than 500mm, return more than lift thickness 11m；
B, in the bottom of foundation ditch argillic horizon is inserted, then vertically set steel pipe casing in foundation ditch, argillic horizon
Thickness be more than 500mm；
The top of steel pipe casing after C, backfill will basset；
D, prepare mud using clay and water stirring, mud balance is more than 1.35；
E, by the slurry prime of preparation to steel pipe casing, allow mud to fill steel pipe casing；
F, the backfill layer hammered using Driven Piles in steel pipe casing, mud off pore-forming, hammering pore-forming is to level of ground water shadow
Ring below line；
G, portland cement is added into the steel pipe casing for being perfused with mud, and is sufficiently stirred for mud, form cement mortar,
Then more than 12 hours are stood, is further continued for the backfill layer in Driven Piles hammering steel pipe casing, is returned until hammering pore-forming penetrates super thick
Packing course.
Further, the speed of the hammering pore-forming is every 30 minutes penetration controls in 0.5-1.25m, the big particle diameter block of chance
Every 30 minutes penetration controls are in 0.1-0.35m during stone；
Further, the internal diameter of the steel pipe casing is 800mm, and a diameter of 600mm of tup of the Driven Piles, tup is long
2.7 meters, tup weighs 3 tons.
Further, when hammering pore-forming penetrates pool quarrel layer, use convolution instead and turn the progress holing with slurry wall protection operation of stake machine.
The super thick backfill layer pile base construction method of the present invention, using distinctive technique of the invention, can make super thick backfill layer stake
Base pore-forming is more convenient, efficient and quick, and then can shorten the construction period, reduces construction cost.Therefore, super thick of the invention is returned
Packing course pile base construction method has prominent substantive distinguishing features and significant progress.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, described in detail below with presently preferred embodiments of the present invention as after.
Embodiment
With reference to embodiment, the embodiment to the present invention is described in further detail.Following examples are used for
Illustrate the present invention, but be not limited to the scope of the present invention.
The present invention, which is applicable, does not carry out heavy tamping treatment, and backfill layer natural subsidence is closely knit, structure relative loose；Contain in backfill material
Particle diameter is more than 500mm block stone, returns more than lift thickness 11m；Active workings are close to sea wall, and place surface water is by sea tidal level shadow
The larger coastal area of sound, which is cut into a mountain, backfills the place of formation；Pile foundation type is cast-in-situ bored pile, and pile foundation spacing is more than 9m.
The super thick backfill layer pile base construction method of the present invention, it comprises the following steps：
A, backfilled using machinery in super thick and foundation ditch for burying steel pipe casing is excavated on layer, the depth of foundation ditch is more than 5 meters；
The super thick backfill layer refers to place close to sea wall, and the backfill of cutting into a mountain that place surface water is influenceed by sea tidal level is formed
Place, place do not carry out heavy tamping treatment, and backfill layer is closely knit by natural subsidence, internal structure relative loose；Contain in backfill material
There is the block stone that particle diameter is more than 500mm, return more than lift thickness 11m；
B, in the bottom of foundation ditch argillic horizon is inserted, then vertically set steel pipe casing in foundation ditch, argillic horizon
Thickness be more than 500mm；
The top of steel pipe casing after C, backfill will basset；
D, prepare mud using clay and water stirring, mud balance is more than 1.35；
E, by the slurry prime of preparation to steel pipe casing, allow mud to fill steel pipe casing；
F, the backfill layer hammered using Driven Piles in steel pipe casing, mud off pore-forming, hammering pore-forming is to level of ground water shadow
Ring below line；
G, portland cement is added into the steel pipe casing for being perfused with mud, and is sufficiently stirred for mud, form cement mortar,
Then more than 12 hours are stood, is further continued for the backfill layer in Driven Piles hammering steel pipe casing, is returned until hammering pore-forming penetrates super thick
Packing course.
As a further improvement on the present invention, the speed of above-mentioned hammering pore-forming is every 30 minutes penetration controls in 0.5-
1.25m, every 30 minutes penetration controls are in 0.1-0.35m when meeting large-size rock fragment；
As a further improvement on the present invention, the internal diameter of above-mentioned steel pipe casing is 800mm, the tup diameter of the Driven Piles
For 600mm, 2.7 meters of tup length, tup weighs 3 tons.
As a further improvement on the present invention, when hammering pore-forming penetrates pool quarrel layer, use convolution instead and turn stake machine progress mud
Retaining wall bore operation.
Described above is only the preferred embodiment of the present invention, is not intended to limit the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is some improvement and
Modification, these improvement and modification also should be regarded as protection scope of the present invention.
Claims (4)
1. super thick backfills layer pile base construction method, it is characterised in that comprise the following steps：
A, backfilled using machinery in super thick and foundation ditch for burying steel pipe casing is excavated on layer, the depth of foundation ditch is more than 5 meters；
The super thick backfill layer refers to the field that place is formed close to sea wall, the backfill of cutting into a mountain that place surface water is influenceed by sea tidal level
Ground, place does not carry out heavy tamping treatment, and backfill layer is closely knit by natural subsidence, internal structure relative loose；Contain grain in backfill material
Footpath is more than 500mm block stone, returns more than lift thickness 11m；
B, in the bottom of foundation ditch argillic horizon is inserted, then vertically set steel pipe casing in foundation ditch, the thickness of argillic horizon
Degree is more than 500mm；
The top of steel pipe casing after C, backfill will basset；
D, prepare mud using clay and water stirring, mud balance is more than 1.35；
E, by the slurry prime of preparation to steel pipe casing, allow mud to fill steel pipe casing；
F, the backfill layer hammered using Driven Piles in steel pipe casing, mud off pore-forming, hammering pore-forming is to Effect of Underground Water Level line
Below；
G, portland cement is added into the steel pipe casing for being perfused with mud, and be sufficiently stirred for mud, form cement mortar, then
More than 12 hours are stood, the backfill layer in Driven Piles hammering steel pipe casing is further continued for, until hammering pore-forming penetrates super thick backfill layer.
2. super thick according to claim 1 backfills layer pile base construction method, it is characterised in that：The speed of the hammering pore-forming
Be every 30 minutes penetration controls in 0.5-1.25m, every 30 minutes penetration controls are in 0.1-0.35m when meeting large-size rock fragment.
3. super thick according to claim 2 backfills layer pile base construction method, it is characterised in that：The internal diameter of the steel pipe casing
For 800mm, a diameter of 600mm of tup of the Driven Piles, 2.7 meters of tup length, tup weighs 3 tons.
4. the super thick backfill layer pile base construction method according to claim 1 or 2 or 3, it is characterised in that：When hammering pore-forming is worn
During saturating pool quarrel layer, use convolution instead and turn the progress holing with slurry wall protection operation of stake machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710443680.8A CN107327314B (en) | 2017-06-13 | 2017-06-13 | Construction method of ultra-thick backfill layer pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710443680.8A CN107327314B (en) | 2017-06-13 | 2017-06-13 | Construction method of ultra-thick backfill layer pile foundation |
Publications (2)
| Publication Number | Publication Date |
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| CN107327314A true CN107327314A (en) | 2017-11-07 |
| CN107327314B CN107327314B (en) | 2020-06-05 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3672304B1 (en) * | 2004-10-28 | 2005-07-20 | 株式会社高特 | Filling method of existing buried hollow pipe and backfilling method of existing structure |
| CN101289861A (en) * | 2008-04-10 | 2008-10-22 | 中交三航局第二工程有限公司 | Pile foundation construction method for foundation ditch in water |
| CN102518130A (en) * | 2011-12-29 | 2012-06-27 | 中铁上海工程局华海工程有限公司 | Reinforcement cage cement plaster pile casing for sea reclamation fill geological basement and construction process thereof |
| CN104120716A (en) * | 2013-04-28 | 2014-10-29 | 杨哲 | Slurry wall protection construction method for bored pile |
| CN104818712A (en) * | 2015-04-07 | 2015-08-05 | 浙江大华建设集团有限公司 | Construction method of cast-in-situ bored pile suitable for karst cave geology |
-
2017
- 2017-06-13 CN CN201710443680.8A patent/CN107327314B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3672304B1 (en) * | 2004-10-28 | 2005-07-20 | 株式会社高特 | Filling method of existing buried hollow pipe and backfilling method of existing structure |
| CN101289861A (en) * | 2008-04-10 | 2008-10-22 | 中交三航局第二工程有限公司 | Pile foundation construction method for foundation ditch in water |
| CN102518130A (en) * | 2011-12-29 | 2012-06-27 | 中铁上海工程局华海工程有限公司 | Reinforcement cage cement plaster pile casing for sea reclamation fill geological basement and construction process thereof |
| CN104120716A (en) * | 2013-04-28 | 2014-10-29 | 杨哲 | Slurry wall protection construction method for bored pile |
| CN104818712A (en) * | 2015-04-07 | 2015-08-05 | 浙江大华建设集团有限公司 | Construction method of cast-in-situ bored pile suitable for karst cave geology |
Non-Patent Citations (2)
| Title |
|---|
| 戴冰法: "填海地段应用大口径冲孔灌注桩的施工技术", 《福建建筑》 * |
| 王超雄 等: "在填海抛石棱体区冲击成孔的工艺探讨", 《土工基础》 * |
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| CN107327314B (en) | 2020-06-05 |
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