CN104612147B - A kind of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould and construction method thereof - Google Patents
A kind of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould and construction method thereof Download PDFInfo
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- CN104612147B CN104612147B CN201510022254.8A CN201510022254A CN104612147B CN 104612147 B CN104612147 B CN 104612147B CN 201510022254 A CN201510022254 A CN 201510022254A CN 104612147 B CN104612147 B CN 104612147B
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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
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D11/00—Methods or apparatus specially adapted for both placing and removing sheet pile bulkheads, piles, or mould-pipes
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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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0051—Including fibers
- E02D2300/0064—Including fibers made from metal
Abstract
The invention discloses a kind of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould and construction method thereof, stake mould comprises outer tube and inner tube and cavity structure between the two, vibration head, activity shoe and the charging aperture of concentric setting, outer tube bottom even is wound around stake loft circle, and its both positive and negative polarity lead-out wire is connected with DC power control device; The outside of stake loft circle and both positive and negative polarity lead-out wire is provided with coil protector. Construction method comprises the steps such as a loft circle is installed, coil protector is installed, the interior formation that produces axial magnetic field and cast-in-place directed steel fibre PCC stake of cavity structure. Said structure and method, overcome the random random distribution of existing PCC stake pile body horizontal bearing capacity steel fibre low, that steel fiber reinforced concrete moulding process causes, effectively low the and very most of steel fibre of utilization ratio can not be brought into play the shortcoming of due shearing resistance effect. Pile body shearing strength improves 50%～100%, or reach the required steel fibre of identical pile body shearing strength and can reduce 20%～? 60%.
Description
Technical field
The present invention relates to a kind of pipe pile mould and construction method thereof, particularly a kind of cast-in-place directed steel fiber reinforced concrete is straight greatlyFootpath pipe pile mould and construction method thereof.
Background technology
China is vast in territory, and weak soil is extensively distributed in coastal area, particularly economically developed Yangtze River Delta and the Zhujiang RiverDelta. Building highway, railway, bridge etc. in soft clay area need to carry out consolidation process to soft soil foundation, and pile foundation and multipleClosing foundation technical is the foundation treatment technology being most widely used. How in saving material usage expense, to improve pile body holdsThe power of carrying, improves foundation stabilization quality, is one of long-term hot subject of paying close attention to of researcher.
Before the present invention, in the application documents such as patent No. ZL02112538.4 and ZL01273182.X, to cast-in-placeConcrete large-diameter tubular pile (referred to as PCC stake) discloses. Due to PCC stake, obtain with less concrete amountTherefore large bearing capacity is the stake type that a kind of economical rationality, cost performance are superior. PCC stake is plain concrete pile, and it is anti-that it has levelCut the shortcomings such as insufficient strength is large, so the level that is difficult to is to the very large situation of load. Therefore, increasing pile body shearing strength isA research direction of PCC stake, as introducing of steel fibre concrete etc.
The moulding process of existing steel fiber reinforced concrete is that the raw material such as sand, stone, cement and steel fibre are mixed together, and addsEnter mixing water and stir, enter mould vibration compacting. According to the steel fiber reinforced concrete of this technological forming, steel fibre is in concreteRandom random distribution. In Practical Project, can effectively provide the distribution arrangement of the steel fibre of shearing strength should be axially consistent with stake, because ofAnd the steel fiber reinforced concrete that adopts traditional handicraft to prepare only has the fraction consistent or approaching with stake axial direction just to play increaseThe effect of pile body shearing strength. The shortcoming of existing moulding process is that in concrete, effective utilization ratio of steel fibre is very low, phaseCannot bring into play the shearing resistance effect of expectation when the steel fibre of part, also can cause preparing the raw material consumption of steel fiber reinforced concrete simultaneouslyGreatly increase.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, and provide a kind of shearing strength high,Steel fibre materials are few, cost is low cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould and construction method thereof.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould, comprises outer tube and the inner tube of concentric setting, outer tubeAnd between inner tube, form a cavity structure, and the top of this cavity structure is connected with vibration head, and the bottom of cavity structure is connected withActivity shoe, the top of outer tube is provided with the charging aperture communicating with cavity structure, it is characterized in that: the outer wall bottom of described outer tubeUniform winding has a loft circle, and the both positive and negative polarity lead-out wire of stake loft circle is connected with the DC power control device outside being arranged at a mouldConnect; The outside of described stake loft circle and both positive and negative polarity lead-out wire is provided with coil protector.
The number of turn of described stake loft circle is 500-800 circle.
The coil protector that is positioned at described stake loft circle outside is the protection steel being mainly made up of two semicircular ring steel discsSheet.
The coil protector that is positioned at described both positive and negative polarity lead-out wire outside is the guarantor who is welded on outer tube wall and is prismaticCorner protector steel.
A construction method for cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould, comprises the following steps:
The first step, stake loft circle is installed: be coated with one deck bonding insulated paint at the outer wall bottom even of outer tube, by equal stake loft circleEven being wound on bonding insulated paint, after insulated paint to be bonded is dry, then does at stake loft circle outside painting one deck covering insulated paintFor protective layer.
Second step, coil protector is installed: at the stake loft circle of first step installation and the both positive and negative polarity of stake loft circleCoil protector is installed in the outside of lead-out wire; Both positive and negative polarity lead-out wire passes from corresponding coil protector, and and direct currentPower-supply controller of electric is connected.
The 3rd step, a stake mould sinks to ground: Vibration on Start-up head, and vibration downwards, whole stake mould all under the drive of vibration head,Sink down into the degree of depth of setting; In sinking process, activity shoe is kept closed under soil pressure effect.
The 4th step, evenly inject steel fiber reinforced concrete: by steel fibre concrete by charging aperture in cavity structure evenlyInject.
The 5th step, produces axial magnetic field in cavity structure: open DC power control device, stake mould coil electricity, cavity knotProduce in structure along stake mold shaft to magnetic field.
The 6th step, stake mould is extracted: reach 1/3 o'clock of cavity structure cumulative volume wait the steel fibre concrete volume injecting, makeVibration head is upwards vibrated, and whole stake mould moves upward and extracts; In stake mould withdrawal process, activity shoe is because of steel fiber reinforced concreteGravitative Loads, opens automatically, and steel fiber reinforced concrete still continues even injection; Under vibrational state, in steel fiber reinforced concreteMagnetic direction in steel fibre distribution arrangement and the 5th step is consistent, and reaches directional profile.
The 7th step, the formation of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile: stake mould continues to move upward, until completelyExtract, at this moment, in ground, will form the cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile of annular.
In the described first step, the height of bonding insulated paint is from 1/2 At The Height to outer tube bottom the outer wall of outer tube.
In described the 4th step, steel fiber reinforced concrete is mainly mixed with by Binder Materials, sand, stone, water reducer and steel fibre.
In described the 4th step, the length of steel fibre is 5-6cm, and diameter is 0.8-1.2cm.
In described the 4th step, the slump scope of described steel fiber reinforced concrete is 100-150mm.
In described the 5th step, after DC power control device is opened, the DC current in stake loft circle is 10-50A, cavity knotIn structure, can produce magnetic induction intensity is 10 × 10-3T～50×10-3The magnetic field of T.
The present invention adopts after said structure and method, has following beneficial effect:
1. the present invention adopts the method that cast-in-place steel fiber reinforced concrete is applied to stabilizing magnetic field, utilizes magnetic induction effect to reachTo the object of steel fibre directional profile in concrete. Thereby, overcome existing armored concrete large-diameter tubular pile pile body levelThe random random distribution of steel fibre, effective utilization ratio that low bearing capacity, steel fiber reinforced concrete moulding process cause are low and very largePart steel fibre can not be brought into play the shortcoming of due shearing resistance effect.
2. utilize stake mould of the present invention and construction method, prepared cast-in-place directed steel fiber reinforced concrete large-diameter tubular pileThe steel fiber reinforced concrete large-diameter tubular pile that more original method and stake mould are built, pile body shearing strength improves 50%～100%, orCan reduce and reach the required steel fibre 20%～60% of identical pile body shearing strength.
3. pair traditional plain concrete PCC stake improves, the horizontal bearing capacity of directional profile steel fibre large-diameter tubular pileGreatly improve, can be used as the pile foundation of skyscraper, bridge, pattern foundation pit supporting structure etc., greatly expanded range of application.
4. only original mould construction equipment carried out to less improvement, increase a small amount of cost, still can bring into play large diameter pipeThe load-carrying properties that pile side friction is large, obtain higher bearing capacity with less concrete amount, have wide applyingProspect.
Brief description of the drawings
Fig. 1 has shown a kind of structure of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould construction method in the present inventionSchematic diagram, wherein, A is stake loft circle scheme of installation; B is coil protector scheme of installation; C is that stake mould sinks to illustratingFigure; D is steel fiber reinforced concrete perfusion schematic diagram; E is that a stake mould cavity structure internal magnetic field forms and schematic diagram is extracted in the vibration of stake mould; FFor stake mould is extracted and steel fiber reinforced concrete large-diameter tubular pile formation schematic diagram completely;
Fig. 2 has shown a kind of structural representation of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould in the present invention;
Fig. 3 has shown the schematic perspective view of coil protective device of the present invention;
Fig. 4 has shown the top view of the protection steel disc in the present invention;
Fig. 5 has shown the top view of the protection angle steel in the present invention;
Fig. 6 has shown the structural representation of the DC power control device using in the present invention.
Wherein have: 1. outer tube; 2. inner tube; 3. charging aperture; 4. activity shoe; 5. vibration head; 6. protection angle steel; 7. protection steelSheet; 8. bolt; 9. a loft circle; 10. both positive and negative polarity lead-out wire; 11. semicircular ring steel discs; 12. cavity structures; 13. dc source controlsDevice processed; 14. current adjusting knobs; 15. power switches; 16. cast-in-place directed steel fiber reinforced concrete large-diameter tubular piles; 17. steel fibresDistribution arrangement.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further detailed explanation with concrete preferred embodiments.
As shown in Figures 2 and 3, a kind of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould, comprises concentric settingOuter tube 1 and inner tube 2, form a cavity structure 12 between outer tube 1 and inner tube 2, the top of this cavity structure 12 is connected with vibration5, the bottom of cavity structure 12 is connected with activity shoe 4.
The top of outer tube 1 is provided with the charging aperture 3 communicating with cavity structure 12, is also preferably provided with coagulation in charging aperture 3Soil current divider, thus can make follow-up steel fiber reinforced concrete evenly pour into.
The outer wall bottom of above-mentioned outer tube 1, preferably 1/2 At The Height from outer wall bottom to outer tube 1, uniform winding has a loftCircle 9. The number of turn of stake loft circle 9 is preferably 500-800 circle; The both positive and negative polarity lead-out wire 10 of stake loft circle 9 be arranged at a mould outsideDC power control device 13 be connected.
DC power control device 13 is prior art, as shown in Figure 6, comprises power switch 15 and DC adjustment knob 14.Whether power switch 15 is controlled to the interior logical direct current of stake loft circle 9, and DC adjustment knob 14 is for controlling led to galvanic electricityStream size.
The outside of above-mentioned stake loft circle 9 and both positive and negative polarity lead-out wire 10 is provided with coil protector.
The preferred arrangement of coil protector is:
1. as shown in Figure 2, Figure 3 and Figure 4, be positioned at a coil protector in loft circle 9 outsides for mainly by two semicircles7, two protection steel discs 7 of protection steel disc that ring steel disc 11 forms are fixed on outer tube 1 by bolt 8.
2. as shown in Fig. 2, Fig. 3 and Fig. 5, be positioned at the coil protector in both positive and negative polarity lead-out wire 10 outsides for being welded in outer tubeOn 1 tube wall and be the protection angle steel 6 of prismatic.
The thickness of above-mentioned protection steel disc 7 and protection angle steel 6 is all preferably made up of the steel plate of 3mm.
As an alternative, stake loft circle 9 outsides coil protector can be also cylindrical sleeve or two semicircularThe compositions such as rigid plastics. The coil protector that is positioned at both positive and negative polarity lead-out wire 10 outsides can be also angle steel or the use of other shapesBeing bolted on outer tube 1, can be also the protection steel disc 7 that forms of two semicircle steel discs 11 etc., and these are simply out of shape, allWithin the application's protection domain.
A construction method for cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould, comprises the following steps:
The first step, a stake loft circle 9 is installed: as shown in the A figure in Fig. 1, in the outer wall bottom of outer tube 1, preferably to outer tube 11/2 At The Height, is evenly coated with the bonding insulated paint that the about 2mm of one deck is thick, by stake loft circle 9 uniform winding of 500-800 circle in bondingOn insulated paint, after insulated paint to be bonded is dry, stake loft circle 9 forms and is firmly connected with outer tube 1; Again in stake loft circle 9 outsidesBe coated with covering insulated paint that one deck about 1mm is thick as protective layer, prevent coil mechanical wear, increase the service life.
In this step, bonding insulated paint and covering insulated paint are all preferably self-drying type insulated paint, and temperature classification is E level.
Second step, coil protector is installed: as shown in the B figure in Fig. 1, at the stake loft circle 9 of first step installationAnd coil protector is installed in the outside of the both positive and negative polarity lead-out wire 10 of stake loft circle 9; Both positive and negative polarity lead-out wire 10 is from corresponding coilIn protective device, pass, and be connected with the output of DC power control device 13.
The 3rd step, a stake mould sinks to ground: as shown in the C figure in Fig. 1, Vibration on Start-up 5, and vibration downwards, whole stake mouldAll, under the drive of vibration head 5, sink down into the degree of depth of setting. In sinking process, activity shoe 4 keeps closing under soil pressure effectClose state. Before the in place and align piles position of stake mould, activity shoe 4 need be carried out to closure here.
The 4th step, evenly injects steel fiber reinforced concrete: as shown in the D figure of Fig. 1, steel fibre concrete is passed through to charging aperture3 to the interior even injection of cavity structure 12.
Above-mentioned steel fiber reinforced concrete, is mainly mixed and is prepared by Binder Materials, sand, stone, water reducer and steel fibre. Steel fibreThe length of dimension is 5-6cm, and diameter is 0.8-1.2cm. Its preferred preparation process is: load weighted Binder Materials, sand, stone are thrownEnter mixer siccative and stir, then drop into while stirring whole load weighted steel fibres to stirring, then add weighingGood mixing water and water reducer (as high efficiency water reducing agent), continue to stir 3min～5min, control steel fiber reinforced concrete mixtureThe slump is within the scope of 100mm～150mm, to reduce mixture viscosity resistance.
D figure from Fig. 1 can find out, due to now, does not start energising in cavity structure 12, and the steel fibre having poured into is mixedSteel fibre distribution arrangement 17 in solidifying soil is random random distribution state.
The 5th step, the interior generation axial magnetic field of cavity structure 12: open the power switch 15 in DC power control device 13, andControl size of current by current adjusting knob 14. Dc source in power supply power-supply controller of electric 13 is provided by battery, voltageBe generally 36V. Stake loft circle 9 is switched on, and the DC current in stake loft circle 9 is 10-50A, and cavity structure 12 is interior can produce magnetic strengthAnswering intensity is 10 × 10-3T～50×10-3The magnetic field of T, as shown in E figure and F figure in Fig. 1, the interior generation of cavity structure 12 edgeStake mold shaft to magnetic field.
The 6th step, stake mould is extracted: as shown in the E figure in Fig. 1, steel fibre concrete volume to be injected reaches cavity structure1/3 o'clock of 12 cumulative volumes, upwards vibrates vibration head 5, and whole stake mould moves upward and extracts; In stake mould withdrawal process, activityShoe 4, because of the Gravitative Loads of steel fiber reinforced concrete, is opened automatically, and steel fiber reinforced concrete still continues even injection; At vibration shapeUnder state, steel fiber reinforced concrete viscosity resistance is less, therefore in the steel fibre distribution arrangement 17 in steel fiber reinforced concrete and the 5th stepMagnetic direction is consistent, and reaches directional profile, forms the reinforced action of directed steel fibre. Upwards vibrate the mistake of extracting at stake mouldCheng Zhong, the magnetic field in cavity structure 12 also with on move, the steel fibre in whole pile body length all can be reached to directional profileEffect, and enter in ground by cavity structure 12.
The 7th step, the formation of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile 16: as shown in the F figure in Fig. 1, stake mould continuesContinuous moving upward, until extract completely, at this moment, will form the cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile of annular in ground16。
The present invention adopts the method that cast-in-place steel fiber reinforced concrete is applied to stabilizing magnetic field, utilizes magnetic induction effect to reach steelThe object of fiber directional profile in concrete. Thereby overcome the steel fibre that existing steel fiber reinforced concrete moulding process causesRandom random distribution, effectively low the and very most of steel fibre of utilization ratio can not be brought into play the shortcoming of due shearing resistance effect.
Confirm by experiment, utilize stake mould of the present invention and construction method, prepared cast-in-place directed steel fiber reinforced concreteThe steel fiber reinforced concrete large-diameter tubular pile that the more original method of large-diameter tubular pile and stake mould are built, pile body shearing strength improves 50%～100%, or can reduce and reach the required steel fibre 20%～60% of identical pile body shearing strength.
It should be appreciated by those skilled in the art that those skilled in the art can be real in conjunction with prior art and above-described embodimentExisting described variation example, does not repeat them here. Such variation example does not affect flesh and blood of the present invention, does not repeat them here.
Claims (6)
1. a construction method for cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould, pipe pile mould comprises concentric settingOuter tube and inner tube, form a cavity structure between outer tube and inner tube, the top of this cavity structure is connected with vibration head, cavity knotThe bottom of structure is connected with activity shoe, and the top of outer tube is provided with the charging aperture communicating with cavity structure, the outer wall of described outer tubeBottom even is wound with a loft circle, the both positive and negative polarity lead-out wire of stake loft circle be arranged at a DC power control device in mould outsideBe connected; The outside of described stake loft circle and both positive and negative polarity lead-out wire is provided with coil protector; It is characterized in that: comprise withLower step:
The first step, stake loft circle is installed: be coated with one deck bonding insulated paint at the outer wall bottom even of outer tube, stake loft circle is evenly twinedBe around on bonding insulated paint, after insulated paint to be bonded is dry, then be coated with one deck covering insulated paint in stake loft circle outside as guarantorSheath;
Second step, coil protector is installed: draw at the stake loft circle of first step installation and the both positive and negative polarity of stake loft circleCoil protector is installed in the outside of line; Both positive and negative polarity lead-out wire passes from corresponding coil protector, and and dc sourceController is connected;
The 3rd step, stake mould sinks to ground: Vibration on Start-up head, and vibration downwards, whole stake mould all, under the drive of vibration head, sinksTo the degree of depth of setting; In sinking process, activity shoe is kept closed under soil pressure effect;
The 4th step, evenly injects steel fiber reinforced concrete: steel fibre concrete is evenly injected in cavity structure by charging aperture;
The 5th step, produces axial magnetic field in cavity structure: open DC power control device, stake mould coil electricity, in cavity structureProduce along stake mold shaft to magnetic field;
The 6th step, stake mould is extracted: reach 1/3 o'clock of cavity structure cumulative volume wait the steel fibre concrete volume injecting, make vibrationHead is vibration upwards, and whole stake mould moves upward and extracts; In stake mould withdrawal process, activity shoe is because of the deadweight of steel fiber reinforced concreteEffect, automatically open, and steel fiber reinforced concrete still continues even injection; Under vibrational state, the steel fibre in steel fiber reinforced concreteMagnetic direction in dimension distribution arrangement and the 5th step is consistent, and reaches directional profile;
The 7th step, the formation of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile: stake mould continues to move upward, until pull out completelyGo out, meanwhile, in ground, will form the cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile of annular.
2. the construction method of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould according to claim 1, its featureBe: in the described first step, the height of bonding insulated paint is from 1/2 At The Height to outer tube bottom the outer wall of outer tube.
3. the construction method of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould according to claim 1, its featureBe: in described the 4th step, steel fiber reinforced concrete is mixed with by Binder Materials, sand, stone, water reducer and steel fibre.
4. the construction method of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould according to claim 1, its featureBe: in described the 4th step, the length of steel fibre is 5-6cm, and diameter is 0.8-1.2cm.
5. the construction method of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould according to claim 1, its featureBe: in described the 4th step, the slump scope of described steel fiber reinforced concrete is 100-150mm.
6. the construction method of cast-in-place directed steel fiber reinforced concrete large-diameter tubular pile stake mould according to claim 1, its featureBe: in described the 5th step, after DC power control device is opened, the DC current in stake loft circle is 10-50A, cavity structureThe interior magnetic induction intensity that can produce is 10 × 10-3T～50×10-3The magnetic field of T.
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| CN106378857B (en) * | 2016-11-08 | 2018-12-11 | 哈尔滨工业大学 | A kind of molding machine and its application method of steel fibre orientation enhancing ultra-high performance concrete |
| CN107604957B (en) * | 2017-10-13 | 2020-10-16 | 北京工业大学 | Complex heterogeneous soil-in-pipe pile longitudinal vibration analysis method based on viscous damping model |
| CN107620329B (en) * | 2017-10-13 | 2020-10-13 | 北京工业大学 | Vertical fluctuation effect considered longitudinal vibration analysis method for radial heterogeneous soil-in-pipe pile |
| CN109551611A (en) * | 2018-12-04 | 2019-04-02 | 佛山科学技术学院 | A kind of equipment preparing unidirectional distributive steel fiber beams of concrete |
| CN110468830A (en) * | 2019-09-10 | 2019-11-19 | 河海大学 | A kind of rapid anchor ingot stake and construction method |
| CN112028514B (en) * | 2020-09-03 | 2021-07-23 | 广东省建筑设计研究院有限公司 | Toughening method of ultra-high performance fiber reinforced cement-based material without coarse aggregate |
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| JPH11107273A (en) * | 1997-09-30 | 1999-04-20 | Taisei Corp | Construction method of cast-in-place pile |
| CN1816431A (en) * | 2003-05-22 | 2006-08-09 | 贝克控股索恩有限公司 | Method and apparatus for aligning magnetizable particles in a pasty material |
| CN101913188B (en) * | 2010-07-23 | 2011-11-30 | 河北工业大学 | Method and special equipment for preparing unidirectionally-distributed steel fiber reinforced concrete |
| CN201769264U (en) * | 2010-07-23 | 2011-03-23 | 河北工业大学 | Device for preparing steel fiber reinforced cement-based materials in one-way distribution |
| CN102296598B (en) * | 2011-06-20 | 2013-05-15 | 河海大学 | Construction method of PCC (cast-in-place concrete large-diameter pipe) pile |
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