CN106545016A - Super-large diameter pressure bearing pile DLC underwater gliders method - Google Patents
Super-large diameter pressure bearing pile DLC underwater gliders method Download PDFInfo
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- CN106545016A CN106545016A CN201611015796.3A CN201611015796A CN106545016A CN 106545016 A CN106545016 A CN 106545016A CN 201611015796 A CN201611015796 A CN 201611015796A CN 106545016 A CN106545016 A CN 106545016A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/06—Placing concrete under water
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- 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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- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
The present invention discloses a kind of super-large diameter pressure bearing pile DLC underwater gliders method, it is characterised in that comprise the steps：Step a:A type underwater self-compaction concrete is researched and developed, the slump of the underwater self-compaction concrete is 280mm, and divergence is 750mm, and gradual loss is zero within two hours, and the presetting period reaches 10h ± 2h；Step b：A Large Copacity concrete hopper is designed, every piece of vertical plane plate lower end of the Large Copacity concrete hopper is correspondingly provided with one piece of skewback, and four pieces of skewback lower ends form a discharging opening；Step c:Well-head frame is set at stake mouth, and two conduits are arranged side by side on well-head frame；Step d：Underwater self-compaction concrete is prepared in concrete mixing plant, and the underwater self-compaction concrete for preparing is transported to job site；Step e：Pour the underwater self-compaction concrete that transport comes into two Large Copacity concrete hoppers.This method can complete super-large diameter pressure bearing pile filling concrete well, and pouring quality is high.
Description
Technical field
The invention belongs to pile foundation engineering field, is related to a kind of super-large diameter pressure bearing pile DLC underwater gliders side
Method.
Background technology
Due to being affected by geological conditions, part engineering adopts pile foundation, the now common general 2.5m in pile foundation stake footpath, stake bottom
3 ㎡ of area or so, the amount of concrete required for perfusion is in 5 ㎡ or so.Existing routine pours mode and adopts conventional concrete, and
Using low capacity hopper+mono- conduit feeding style, first watering concrete pipe laying height code requirement is 800mm, this conventional coagulation
Soil and feeding style can meet the perfusion of minor diameter pressure bearing pile well and require.Also, conventional subsea concrete adopts C40 under water certainly
Air-free concrete, its proportioning are as follows：
| Title material | Water | Cement | Flyash | Breeze | Fine aggregate | Coarse aggregate | Additive |
| Every cubic metre of consumption (Kg) | 150 | 377 | 60 | 30 | 632 | 1161 | 9.43 |
| Mass ratio | 0.398 | 1 | 0.159 | 0.08 | 1.676 | 3.080 | 0.025 |
, the 200 ± 20mm of the slump of conventional concrete, 6 ± 2h of presetting period do not do index request to gradual loss.Its
In, the slump is used for the mobility for representing concrete, and the bigger mobility for representing concrete of the slump is better；Gradual loss is referred to
Performance loss when concrete is from mixing plant to perfusion, performance when gradual loss is 0 expression concrete from mixing plant to perfusion
Loss, and the presetting period refers to concrete from the time for being poured into solidification, the presetting period, the longer the better.
As high-rise building is more and more, Pile Foundations Design diameter is also increasing, and such as club-footed pile footpath reaches 9.4m, maximum
Oval stake bellout diameter 6.4m, 48 ㎡ of stake floor space or so, the amount of concrete required for perfusion is in ㎡ Duo in the of 50.And area is received near a river
Influence on groundwater, stake ground swell water and pile lining Bedrock Crevice Water enrich, and cannot be protected using existing conventional concrete and casting method
Card pile foundation quality, need to be constructed using underwater concreting mode.Simultaneously as stake floor space is excessive, using single conduit
Feeding style, concrete performance cannot ensure that first watering concrete spreads over whole stake bottom, and conventional little hopper at short notice
First watering concrete specification requirement cannot be met.
The content of the invention
The technical problem to be solved is to provide a kind of super-large diameter pressure bearing pile DLC underwater concrete to fill
Injecting method, super-large diameter pressure bearing pile perfusion to be reliably completed.
Technical scheme is as follows：A kind of super-large diameter pressure bearing pile DLC underwater gliders method, which is special
Levy is to comprise the steps：
Step a:A type underwater self-compaction concrete is researched and developed, the underwater self-compaction concrete formula is water, cement, II grade of powder
Coal, S95 breezes, silicon ash, Machine-made Sand, natural sand, 0-1 rubbles, 132 rubbles and additive, per 1m3Contain in self-compacting concrete
Water 160kg, cement 270kg, II grade of fine coal 100kg, S95 breeze 80kg, silicon ash 15kg, Machine-made Sand 840kg, natural sand 100kg,
0-1 rubble 260kg, 132 rubble 600kg, additive 24.3kg；The underwater self-compaction concrete slump that above-mentioned formula makes
For 280mm, divergence is 750mm, and gradual loss is zero within two hours, and the presetting period reaches 10h ± 2h；
Step b：A Large Copacity concrete hopper is designed, the Large Copacity concrete hopper includes vertical plane plate (1) and conduit
Joint (5), wherein vertical plane plate (1) number are four pieces, and this four blocks of vertical plane plates surround rectangle frame, every piece of vertical plane plate (1) lower end correspondence
One piece of skewback (2) is provided with, this four pieces of skewbacks surround rectangular funnel structure, are provided with vertical outside vertical plane plate (1) and skewback (2)
The wrong hopper keel (20) of traversed by, and the cavity that vertical plane plate (1) and skewback (2) are collectively constituted is for containing the research and development of step a
Underwater self-compaction concrete；Welded by an end cap (3) respectively the junction of adjacent two pieces of skewback (2) outer plate surfaces
It is fixed, and four pieces of skewback (2) lower ends form a discharging opening, below discharging opening are welded with one by conduit welded plate (4)
The individual pipe joint (5), the pipe joint upper end is communicated with the discharging opening lower end；Adjacent two pieces of vertical plane plates (1)
Junction is respectively equipped with a root post (6), and the lower face of four pieces of skewbacks (2) is provided with middle standing pillar (7) and edge column
, and column (6), middle standing pillar (7) and edge column (8) lower end and bottom panel (9) are fixed (8)；
Step c:Well-head frame (10) is set at stake mouth, and two conduits (11) are arranged side by side on well-head frame (10), this
Two conduit lower ends are stretched in well, and the pipe laying of conduit (12) is highly 500mm；Two steps are supported on the well-head frame (10)
The Large Copacity concrete hopper designed in rapid b is big with corresponding by two conduits (11) by a catheter-fixing rack (13) respectively
Pipe joint (5) connection of capacity concrete hopper；
Step d：The underwater self-compaction concrete filled a prescription described in concrete mixing plant preparation steps a, and adopt tank car
The underwater self-compaction concrete for preparing is transported to job site；
Step e：Pour the underwater self-compaction concrete that transport comes into two Large Copacity concrete hoppers, and it is big by the two
The corresponding conduit of capacity concrete hopper (11) is while pour underwater self-compaction concrete into well, and then completes super-large diameter and hold
The filling concrete of piling.
In above-mentioned technical proposal, this method synthesis pile foundation overview, with reference to live place situation, from raising underwater concrete
Performance, design vast capacity hopper and formulate hopper scheme of architecture, optimization underwater concrete just irrigation technology this put forth effort in terms of three,
Specifically：
1st, the performance of underwater concrete is improved, by the formula for adjusting underwater self-compaction concrete, and changes matching somebody with somebody for formula
Than great changes will take place for the concrete performance after above-mentioned adjustment, is embodied in：The slump of underwater concrete is by original
200 ± 20mm improve 280mm till now, the presetting period is improved 10h ± 2h till now by 6 original ± 2h, and originally
Gradual loss index is not required, and two hours gradual loss of concrete are zero in this programme.It should be strongly noted that
The slump brings up to 280mm from 200 ± 20mm, thus significantly enhances the mobility of concrete, contributes to concrete quick
The stake bottom of super-large diameter pressure bearing pile is covered, and the slump just can be described as superelevation chutable concrete in the concrete of more than 220mm.Just
The solidifying time greatly improves 10h ± 2h, this makes it possible to ensure concrete pouring quality, it is to avoid the presetting period is too short and cause
The concrete for first irrigating has solidified, the concrete ot-yet-hardened for irrigating afterwards, in order to avoid pouring quality cannot be ensured.In addition, two is little
When gradual loss be zero to mean that concrete does not change from mixing plant is gone out to its performance in job site 2 hours, so
Can guarantee that pouring quality.To sum up, the performance indications of above-mentioned concrete than conventional concrete in prior art performance indications significantly
Improve, be particularly well-suited to irrigate super-large diameter pressure bearing pile.
2nd, as the stake floor space of super-large diameter pressure bearing pile is big, and existing low capacity hopper capacity is little, structural strength is low,
Low capacity hopper cannot meet the construction requirement of super-large diameter pressure bearing pile at all；The Large Copacity concrete material bucket structure of this case design
Intensity is high, and the side's amount for containing concrete is big, up to ㎡ Duo in the of 20, can meet super-large diameter pressure bearing pile needs concrete square well
The big requirement of amount.Also, two Large Copacity concrete hoppers are arranged side by side, while concrete perfusion, when so can improve unit
Between concrete groundwater increment, it is ensured that a bottom is completely covered within the presetting period；
3rd, optimize underwater concrete just irrigation technology, the pipe laying height of conduit is dropped by the 800mm of traditional minor diameter pressure bearing pile
It is low to 500mm, side's amount of filling concrete can be thus greatly reduced, such that it is able to reduce the structure of Large Copacity concrete hopper
Intensity and containing quantity are required.
Beneficial effect：This method can complete super-large diameter pressure bearing pile filling concrete well, and pouring quality is high, this
Filling concrete method is entirely different with existing minor diameter pressure bearing pile filling concrete, achieves good economic benefit and society
Can effect.
Description of the drawings
Fig. 1 is adopted the schematic diagram of Large Copacity concrete hopper by the present invention.
Accompanying drawings of the Fig. 2 for Fig. 1.
Fig. 3 is the A-A of Fig. 2 to sectional view.
Fig. 4 is the schematic diagram that Large Copacity concrete hopper is erected at well head in the present invention.
B-B direction sectional views of the Fig. 5 for Fig. 4.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples：
A kind of super-large diameter pressure bearing pile DLC underwater gliders method, it is characterised in that comprise the steps：
Step a:Research and develop a type underwater self-compaction concrete, as shown in table 1, the underwater self-compaction concrete formula be water,
Cement, II grade of fine coal, S95 breezes, silicon ash, Machine-made Sand, natural sand, 0-1 rubbles, 132 rubbles and additive, per 1m3Self-compaction
Containing water 160kg, cement 270kg in concrete, II grade of fine coal 100kg, S95 breeze 80kg, silicon ash 15kg, Machine-made Sand 840kg,
Natural sand 100kg, 0-1 rubble 260kg, 132 rubble 600kg, additive 24.3kg；The self-compaction under water that above-mentioned formula makes
Concrete slump is 280mm, and divergence is 750mm, and gradual loss is zero within two hours, and the presetting period reaches 10h ± 2h, and this case
The middle underwater self-compaction concrete strength grade for adopting is for C45.
1 C45 underwater self-compaction concrete match ratios (kg/m3) of table
In above-mentioned formula, the technical indicator of each composition is as follows：As shown in table 2, the specific surface area 340 of Lafarge cement
㎡/Kg, 3d 29 ± 3Mpa of intensity, 28d 50 ± 3Mpa of intensity, presetting period 175mm, final setting time 270mm.
2 Lafarge cement technology index of table
As shown in table 3, the loss on ignition 3.4% of II grade of flyash, moisture content 0.9%, fineness 16.2%.
3 II grades of flyash technical indicators of table
| Loss on ignition (%) | Moisture content (%) | Water demand ratio (%) | Fineness (%) |
| 3.4 | 0.9 | 98 | 16.2 |
As shown in table 4, grade S95 of breeze, 480 ㎡ of specific surface area/Kg, 7 days activity indexs 78%.
4 breeze technical indicator of table
| Grade | Specific surface area (m2/Kg) | 7d activity indexs/% | 28d activity indexs/% |
| S95 | 480 | 78 | 97 |
As shown in table 5, the moisture content 1.3% of silicon ash, loss on ignition 3.1%, SiO2 contents 92%, 7 days activity indexs 96%.
5 silicon ash technical indicator of table
| Moisture content/% | Loss on ignition/% | SiO2/ % | 7d activity indexs/% | 28d activity indexs/% |
| 1.3 | 3.1 | 92 | 96 | 115 |
As shown in table 6, clay content≤0.5% of rubble, clod content 0%, elongated particles≤3%, crush index≤
8%.
6 crushing technique index of table
| Kind | Clay content (%) | Clod content (%) | Elongated particles (%) | Crush index (%) |
| 5-20mm | ≤0.5 | 0 | ≤3 | ≤8 |
As shown in table 7, content of stone powder≤10% of machine sand (i.e. Machine-made Sand), MB value≤1.4%, modulus of fineness 2.8-3.2.
7 machine sand technical indicator of table
| Content of stone powder (%) | MB values | Modulus of fineness |
| ≤10 | ≤1.4 | 2.8-3.2 |
As shown in table 8, the solid content 15-18% of high performance water reducing agent of polyocarboxy acid (i.e. additive), water-reducing rate 25- are built
28%, volume 1.2-1.4%.
Table 8 builds high performance water reducing agent of polyocarboxy acid technical indicator
| Solid content (%) | Water-reducing rate (%) | Volume (%) |
| 15-18 | 25-28 | 1.2-1.4 |
Step b：A Large Copacity concrete hopper is designed, such as Fig. 1 -- shown in 3, the Large Copacity concrete hopper includes erecting
Panel 1 and pipe joint 5, wherein 1 number of vertical plane plate are four pieces, and this four blocks of vertical plane plates 1 surround rectangle frame, under every block of vertical plane plate 1
End is correspondingly provided with one piece of skewback 2, and this four pieces of skewbacks surround rectangular funnel structure, are provided with vertical outside vertical plane plate 1 and skewback 2
The wrong hopper keel 20 of traversed by, the hopper keel 20 are strip structure.The cavity that vertical plane plate 1 and skewback 2 are collectively constituted is used for
Contain the underwater self-compaction concrete of step a research and development.The junction of 2 outer plate surface of adjacent two pieces of skewbacks is respectively by an end cap
3 are welded and fixed, and four pieces of 2 lower ends of skewback form a discharging opening, below discharging opening are welded with one by conduit welded plate 4
Individual pipe joint 5, the pipe joint upper end are communicated with discharging opening lower end.The junction of adjacent two blocks of vertical plane plates 1 is respectively equipped with one
Root post 6, the lower face of four pieces of skewbacks 2 are provided with middle standing pillar 7 and edge column 8, and middle standing pillar 7 is located at the inner side of edge column 8,
Edge column 8 is located at the outward flange of skewback 2.Also, column 6, middle standing pillar 7 and 8 lower end of edge column are solid with the welding of bottom panel 9
It is fixed.
Step c:As shown in Figures 4 and 5, well-head frame 10 is set at stake mouth, the well-head frame 10 is by the I-steel for arranging in length and breadth
Constitute.Two conduits 11 are arranged side by side on well-head frame 10, this two conduit lower ends are stretched in well, and the pipe laying height of conduit 12
For 500mm.The Large Copacity concrete hopper designed during two steps b are supported on well-head frame 10, it is solid by a conduit respectively
Determine frame 13 two conduits 11 are connected with the pipe joint 5 of corresponding Large Copacity concrete hopper.
Step d：The underwater self-compaction concrete filled a prescription in concrete mixing plant preparation steps a, and will be matched somebody with somebody using tank car
The underwater self-compaction concrete for making is transported to job site.
Step e：Pour the underwater self-compaction concrete that transport comes into two Large Copacity concrete hoppers, and it is big by the two
The corresponding conduit of capacity concrete hopper 11 pours underwater self-compaction concrete simultaneously into well, and then completes super-large diameter pressure-bearing
The filling concrete of stake.
Presently preferred embodiments of the present invention is the foregoing is only, not with the present invention to limit, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (1)
1. a kind of super-large diameter pressure bearing pile DLC underwater gliders method, it is characterised in that comprise the steps：
Step a:Research and develop a type underwater self-compaction concrete, the underwater self-compaction concrete formula be water, cement, II grade of fine coal,
S95 breezes, silicon ash, Machine-made Sand, natural sand, 0-1 rubbles, 132 rubbles and additive, per 1m3Contain water in self-compacting concrete
160kg, cement 270kg, II grade of fine coal 100kg, S95 breeze 80kg, silicon ash 15kg, Machine-made Sand 840kg, natural sand 100kg, 0-
1 rubble 260kg, 132 rubble 600kg, additive 24.3kg；The underwater self-compaction concrete slump that above-mentioned formula makes is
280mm, divergence are 750mm, and gradual loss is zero within two hours, and the presetting period reaches 10h ± 2h；
Step b：A Large Copacity concrete hopper is designed, the Large Copacity concrete hopper includes vertical plane plate (1) and pipe joint
(5), wherein vertical plane plate (1) number is four pieces, and this four blocks of vertical plane plates surround rectangle frame, and every piece of vertical plane plate (1) lower end is correspondingly provided with
One piece of skewback (2), this four pieces of skewbacks surround rectangular funnel structure, be provided with hand over outside vertical plane plate (1) and skewback (2) in length and breadth
Wrong hopper keel (20), and the cavity that vertical plane plate (1) and skewback (2) are collectively constituted is for containing the research and development of step a under water
Self-compacting concrete；The junction of adjacent two pieces of skewback (2) outer plate surfaces is welded and fixed by an end cap (3) respectively,
And four pieces of skewback (2) lower ends form a discharging opening, are welded with described in one by conduit welded plate (4) below discharging opening
Pipe joint (5), the pipe joint upper end are communicated with the discharging opening lower end；The junction of adjacent two pieces of vertical plane plates (1)
A root post (6) is respectively equipped with, the lower face of four pieces of skewbacks (2) is provided with middle standing pillar (7) and edge column (8), and vertical
Post (6), middle standing pillar (7) and edge column (8) lower end and bottom panel (9) are fixed；
Step c:Well-head frame (10) is set at stake mouth, and two conduits (11) are arranged side by side on well-head frame (10), this two
Conduit lower end is stretched in well, and the pipe laying of conduit (12) is highly 500mm；Two steps b are supported on the well-head frame (10)
The Large Copacity concrete hopper of middle design, respectively by a catheter-fixing rack (13) by two conduits (11) and corresponding Large Copacity
Pipe joint (5) connection of concrete hopper；
Step d：The underwater self-compaction concrete filled a prescription described in concrete mixing plant preparation steps a, and will be matched somebody with somebody using tank car
The underwater self-compaction concrete for making is transported to job site；
Step e：Pour the underwater self-compaction concrete that transport comes into two Large Copacity concrete hoppers, and by the two Large Copacities
The corresponding conduit of concrete hopper (11) is while pour underwater self-compaction concrete, and then complete super-large diameter pressure bearing pile into well
Filling concrete.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611015796.3A CN106545016B (en) | 2016-11-07 | 2016-11-07 | Super-large diameter pressure bearing pile double duct underwater gliders method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611015796.3A CN106545016B (en) | 2016-11-07 | 2016-11-07 | Super-large diameter pressure bearing pile double duct underwater gliders method |
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| Publication Number | Publication Date |
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| CN106545016A true CN106545016A (en) | 2017-03-29 |
| CN106545016B CN106545016B (en) | 2018-09-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322300A (en) * | 2018-11-23 | 2019-02-12 | 中铁六局集团有限公司 | A kind of major diameter device for casting and major diameter method for filling |
| CN114105571A (en) * | 2021-12-23 | 2022-03-01 | 上海建工建材科技集团股份有限公司 | Machine-made sand self-compacting rock-fill concrete material and preparation method thereof |
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| JPH0925151A (en) * | 1995-07-11 | 1997-01-28 | Mitsui Sekika Sanshi Kk | Primer composition for underwater curing resin concrete and underwater curing resin mortal |
| CN101597899A (en) * | 2009-07-15 | 2009-12-09 | 交通部天津水运工程科学研究所 | The method for filling of underwater drilling castinplace pile |
| CN102277873A (en) * | 2011-05-06 | 2011-12-14 | 清华大学 | Underwater rock-fill concrete construction method |
| CN203113343U (en) * | 2012-12-18 | 2013-08-07 | 中建四局第一建筑工程有限公司 | Underwater concrete casting device for large-diameter cast-in-place pile |
| CN104032742A (en) * | 2014-05-16 | 2014-09-10 | 陕西建工机械施工集团有限公司 | Underground concrete pouring construction technology based on double guide tubes and four hoppers |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0925151A (en) * | 1995-07-11 | 1997-01-28 | Mitsui Sekika Sanshi Kk | Primer composition for underwater curing resin concrete and underwater curing resin mortal |
| CN101597899A (en) * | 2009-07-15 | 2009-12-09 | 交通部天津水运工程科学研究所 | The method for filling of underwater drilling castinplace pile |
| CN102277873A (en) * | 2011-05-06 | 2011-12-14 | 清华大学 | Underwater rock-fill concrete construction method |
| CN203113343U (en) * | 2012-12-18 | 2013-08-07 | 中建四局第一建筑工程有限公司 | Underwater concrete casting device for large-diameter cast-in-place pile |
| CN104032742A (en) * | 2014-05-16 | 2014-09-10 | 陕西建工机械施工集团有限公司 | Underground concrete pouring construction technology based on double guide tubes and four hoppers |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109322300A (en) * | 2018-11-23 | 2019-02-12 | 中铁六局集团有限公司 | A kind of major diameter device for casting and major diameter method for filling |
| CN114105571A (en) * | 2021-12-23 | 2022-03-01 | 上海建工建材科技集团股份有限公司 | Machine-made sand self-compacting rock-fill concrete material and preparation method thereof |
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|---|---|
| CN106545016B (en) | 2018-09-11 |
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