CN110284516A - A kind of lightness prefabricated assembled concrete sheet-pile basis and its construction method - Google Patents
A kind of lightness prefabricated assembled concrete sheet-pile basis and its construction method Download PDFInfo
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- CN110284516A CN110284516A CN201910556503.XA CN201910556503A CN110284516A CN 110284516 A CN110284516 A CN 110284516A CN 201910556503 A CN201910556503 A CN 201910556503A CN 110284516 A CN110284516 A CN 110284516A
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- 239000004567 concrete Substances 0.000 title claims abstract description 114
- 238000010276 construction Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 230000002787 reinforcement Effects 0.000 claims abstract description 12
- 239000011178 precast concrete Substances 0.000 claims description 42
- 230000003014 reinforcing effect Effects 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 28
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 19
- 239000000945 filler Substances 0.000 claims description 17
- 239000004568 cement Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 12
- 239000010881 fly ash Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000011863 silicon-based powder Substances 0.000 claims description 10
- 239000002689 soil Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 3
- 210000000988 bone and bone Anatomy 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000002585 base Substances 0.000 description 8
- 230000006872 improvement Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000003756 stirring Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 210000003205 muscle Anatomy 0.000 description 4
- 229920005646 polycarboxylate Polymers 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000010257 thawing Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011371 regular concrete Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/35—Foundations formed in frozen ground, e.g. in permafrost soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/36—Foundations formed in moors or bogs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (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)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Foundations (AREA)
Abstract
The invention discloses a kind of lightness prefabricated assembled concrete sheet-pile basis and its construction methods, basis include prefabricated lightweight aggregate concrete column with can assembled lightweight aggregate concrete bottom plate, prefabricated stand column longitudinal reinforcement end is connected with connection sleeve, it is concordant with column concrete bottom to connect sleeve one end, prefabricated panel stretches out certain length reserved steel bar；Bottom plate is combined into entirety by connector group, and is connect by connection sleeve grouting with column.Basis of the present invention is remarkably improved the construction efficiency on basis, saves transportation cost, reduces construction hoisting difficulty；The ability that poor environment influences is resisted on enhancing basis, is prolonged its service life；Energy saving and resource reduces the pressure to environment.
Description
Technical field
The present invention relates to field of engineering technology, and in particular to a kind of lightness in the fields such as electric power, communication, building is prefabricated
Assemble type concrete slab column foundation and its construction method.
Background technique
The lifeline engineerings and important buildings or structures etc. such as more and more electric power, communications need guiding through desert, freeze for many years
The excavation of foundation pit such as soil, the network of waterways, mire, beach, littoral soft soil, concreting and maintenance difficult region；Severe cold and corrosion area
Concrete foundation be likely to occur the single and a variety of action breaks down such as freeze thawing, sulphate corrosion, steel bar corrosion, carbonization, abrasion, from
And threaten engineering safety；In addition, live mixing under adverse circumstances, pouring with curing concrete it is difficult to ensure that its quality.To overcome
The problems such as Special section constructional difficulties, quality are difficult to ensure and durability is poor, it is prefabricated assembled basis with its Rapid Excavation backfill,
Quality is easy to control, application gradually increases the good advantage of durability in engineering practice.
In recent years, since the scale of engineering construction and grade are increasing, basic role power is also gradually increased, prefabrication and assembly construction
Formula concrete foundation self weight is also continuously increased with size, increase transport, the difficulty of lifting and comprehensive cost, especially mountain area,
The areas such as plateau, network of waterways mire etc. have inconvenient traffic, execution conditions are severe, seriously constrained the popularization on prefabricated assembled basis with
Using；In addition, corrosion and severe cold freezing and defrosting area are more serious on the influence of the durability of concrete foundation, have become operation of engineering projects
With the main security risk used.To keep foundation construction more convenient economical, safe and reliable, a kind of lightness prefabrication and assembly construction is needed
Formula concrete slab column foundation.
There is the dress of precast concrete block assembling type base, concrete slab and shaped steel combination on existing prefabricated assembled basis
With formula basis etc., be related to following point: 1. precast concrete is all made of normal concrete and pours, and bulk density is generally
2350kg/m3~2400kg/m3, concrete gravity is larger, and transport can consume vast resources；2. prefabricated components self weight, volume compared with
Greatly, hoisting difficulty increases, and the transport difficulty for lifting required equipment is also increase accordingly；3. in corrosivity area, Steel section member is easy
Corrosion failure occurs, is unfavorable for engineering safety；Sulfate ion and chloride ion in corrosivity soil property can corrosion concrete bases；
And be affected suffered by normal concrete under freezing-thawing, shorten concrete service life, influences the safe operation of engineering；4. disliking
Freeze-thaw damage easily occurs for normal concrete under bad environment, and loss of strength is up to 16.2%；5. due to basic role power and geology item
Part variation multiplicity, causes the dimensions of basic engineering very much, and existing assembling type base batch production has difficulties, and cost is difficult to
It reduces；6. existing assembling type base mainly uses the connection of bolt progress prefabricated component, great in constructing amount and durable under corrosive environment
Property it is poor, influence connection reliability；7. normal concrete preparation need to largely consume a large amount of natural stones, it is unfavorable for environmental protection.
Summary of the invention
Present invention aims at above-mentioned the problems of the prior art are directed to, a kind of lightness prefabricated assembled concrete is provided
Sheet-pile basis and its construction method, the basis is with overall structure lightness, transportation cost is low, quick construction, structural integrity
Well, the features such as durability is high, can preferably solve the influence in bad nature of soil area, reach convenient economic, energy-saving and environment-friendly effect.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of lightness prefabricated assembled concrete sheet-pile basis, comprising:
Bottom plate, bottom plate are splicing structure；Plate upper surface is extended with reserved steel bar；
Column, the column are hollow or solid construction；The longitudinal reinforcement bottom of column is connected with connection sleeve, connector sleeve
Cylinder lower end is connect with reserved steel bar, is filled grouting material, column and bottom plate in connection sleeve and is connected by connection sleeve and grouting material
It is integral；
And concrete filler strip, the concrete filler strip are arranged on bottom plate and are located at column bottom periphery, concrete mats
The grouting material is filled in the region that item surrounds；
The bottom plate and column is formed by lightweight aggregate concrete and reinforcing bar are prefabricated.
As a further improvement of the present invention, the connection sleeve bottom end is concordant with column bottom end, and reserved steel bar protrudes into
It connects in sleeve.
As a further improvement of the present invention, the connection sleeve includes sleeve body, sleeve body upper end and longitudinal direction
Rebar junction is provided with sealing-plug, and sleeve body lower end opening is connected with reserved steel bar；Slurry outlet is provided in sleeve body
And injected hole.
As a further improvement of the present invention, the sleeve body inner wall is provided with the shear connector of interlaced arrangement.
As a further improvement of the present invention, the slurry outlet of the connection sleeve is arranged in sleeve body top, slip casting
Hole is arranged in sleeve body lower part.
As a further improvement of the present invention, the sleeve body both ends Bar Anchorage built-in length is not less than 8 times of steel
Muscle nominal diameter；Sleeve body overall length is not less than 18 times of reinforcing bar nominal diameters；Sleeve body outer diameter is not less than 2.5 times of reinforcing bar nominals
Diameter.
As a further improvement of the present invention, the bottom plate is splicing structure comprising can be assembled into cuboid knot
The first precast concrete and the second precast concrete of structure, the first precast concrete and the second precast concrete
Perforative presstressed reinforcing steel preformed hole is provided on component, the first precast concrete and the second precast concrete pass through
Presstressed reinforcing steel preformed hole carries out prestressing force connection.
As a further improvement of the present invention, first precast concrete is L-type, the second precast concrete structure
Part is inverted T shaped；The setting of second precast concrete is arranged in centre, the first precast concrete in the second precast concrete
Component two sides；The reserved steel bar is arranged in second precast concrete upper surface.
As a further improvement of the present invention, the density section of the lightweight aggregate concrete is 1500kg/m3~
1950kg/m3；According to units/kg/m3, lightweight aggregate concrete includes the raw material of following proportion:
Cement: fine aggregate: light coarse aggregate: flyash: silicon powder: water-reducing agent: water=(285~315): (645~675):
(630~660): (175~195): (45~55): (4.20~4.35): (155~172).
A kind of construction method on lightness prefabricated assembled concrete sheet-pile basis, comprising the following steps:
1) component of lightweight aggregate concrete pre-formed bottom plate and column is used, central post longitudinal reinforcement bottom side needs preparatory
Setting connection sleeve, the reserved steel bar of bottom plate should stretch out sufficient length；
2) first assembled bottom plate at the construction field (site), further according to the position of reserved steel bar, hoisting upright column make its with bottom plate whole group
It closes；And concrete filler strip is installed；
3) grouting material is perfused into connection sleeve, outflow is until fill up concrete mats after grouting material fills up connection sleeve inner
Region between item.
Compared with prior art, the present invention have it is following the utility model has the advantages that
Basis of the invention uses lightness prefabricated construction, is made of bottom plate and the column being arranged on bottom plate, in advance
Fabricated construction processed is remarkably improved the construction efficiency on basis, saves transportation cost, reduces construction hoisting difficulty；Connect sleeve pair
Column is reinforced with bottom plate, is enhanced basis and is resisted the ability that poor environment influences, prolongs its service life；Energy saving and money
The pressure to environment is reduced in source.Have in engineering practice using lightweight aggregate concrete and reduces dead load, improves component conveying
And the advantages such as lifting efficiency can reduce basis and weigh about 15% certainly compared with same volume conventional cast-in-place basis；Lightweight aggregate concrete
Self-curing ability, it is more closely knit after Behavior of Hardened Cement Paste can be made to harden, extend before concrete freezes curing period；There are more skies inside aggregate
Gap can reduce its macroscopic view expansion when concrete is endured cold, realize lightweight aggregate concrete under the harsh natural environment of cold district
High frost resistance, porous aggregate also can effectively reduce the huge stress that lightweight aggregate and concrete neutral and alkali substance reaction are formed；Light bone
Material is mostly process by industrial wastes such as flyash, slag, gangues, and it is corrosion-resistant that basis can be improved when applying in engineering practice
The demand of performance, reduction to natural stone, alleviates the pressure to environment.
Prefabricated panel applies prestressing force by presstressed reinforcing steel and is assembled into main body, makes its cooperative bearing, simple and quick construction.
Using connection sleeve connection prefabricated stand column and bottom plate, connects reinforcing bar in sleeve and be in homogeneous grouting material, stress performance is more preferable；Even
Existing gap between female connector cylinder and connection reinforcing bar, can correct the deviation of prefabricated components on the make, install convenient for component；Component
Lifting connect the separable progress of process with reinforcing bar, improves construction efficiency；Connect sleeve reliable performance, it is ensured that the connection of component
Quality and structure safety.
According to the concrete prefabricated column of high strength lightweight aggregate, the enlarged footing of variable cross-section can be used, at the top of column to guarantee
Enlarged footing part has enough sections meeting structure using foundation bolt or inserted angle steel connection superstructure, column other parts
Column sectional dimension can be minimized under the premise of part bearing capacity, reduce concrete amount.
Construction method of the invention compares common prefabricated assembled basis, due to common mixed using lightweight aggregate concrete substitution
Solidifying soil greatly reduces prefabricated components self weight；The transportation cost for reducing component, improves lifting and construction efficiency；It is porous light
Aggregate can resist the non-homogeneous stress of inside concrete generation, guarantee basic overall stability；Industrial waste is process light
Aggregate substitutes natural rubble, can reduce the pressure to environment, energy saving and resource is conducive to environmental protection；Freeze proof and corrosion resistant
Excellent ability is lost, the ruthless area such as severe cold, corrosion is passed through for engineering and provides condition；Using connection sleeve grouting connection work
Skill shapes in foundation pits such as desert, ever-frozen ground, the network of waterways, mire, beach, littoral soft soils or difficult place is maintained to realize fastly
Speed construction is conducive to construction operation and environmental protection, reduces security risk；Basic globality is preferable；For different basic roles
Power and geological environment can be used prefabricated lath overturning superposition in varying numbers and realize when needing to be arranged different key dimensions, and
The sizing of blocking criteria part can be used in prefabricated lath, is convenient for factory steady production, reduction cost in batch.
Detailed description of the invention
Below in conjunction with attached drawing, invention is further explained.
Fig. 1 is prefabricated lightweight aggregate concrete fabricated base structure schematic diagram；
Fig. 2 is the schematic diagram that sleeve is connected in Fig. 1；
Fig. 3 be prefabricated lightweight aggregate concrete can assembled floor diagram, (a) is main view, (b) splices bottom plate for bar shaped
Top view, (c) top view of blocky splicing bottom plate；
Fig. 4 is prefabricated lightweight aggregate concrete assembling type base reinforcing steel bar connecting sleeve tube connection schematic diagram；
Fig. 5 is that the prefabricated lightweight aggregate concrete of two kinds of forms combines base plate part detail drawing, and (a) is L-type Combined concrete bottom
Plate (b) is inverted T shaped Combined concrete bottom plate；
In attached drawing: 1- column；2- connection sleeve；3- bottom plate；4- concrete filler strip；5- presstressed reinforcing steel；6- reserved steel bar；7-
Prefabricated lightweight aggregate concrete lath；8- built-in fitting；9- presstressed reinforcing steel preformed hole；10- sealing-plug；11- grouting material；12- slurry outlet；
13- injected hole.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings.
As shown in Figures 1 to 5, a kind of lightness prefabricated assembled concrete sheet-pile basis of the present invention, comprising:
Bottom plate 3,3 upper surface of bottom plate are extended with reserved steel bar 6；Bottom plate 3 is splicing structure；
And column 1, the column 1 is hollow or solid construction；The longitudinal reinforcement bottom of column 1 is connected with connection sleeve 2,
Connection 2 lower end of sleeve is connect with reserved steel bar 6, and grouting material 11, column 1 and bottom plate 3 are filled in connection sleeve 2 and passes through connection sleeve
2 and grouting material 11 connect it is integral；
The bottom plate 3 and column 1 is formed by lightweight aggregate concrete and reinforcing bar are prefabricated.
Wherein, connection 2 bottom end of sleeve is concordant with 1 bottom end of column, and reserved steel bar 6 protrudes into connection sleeve 2.
Connecting sleeve 2 includes sleeve body, and sleeve body upper end and longitudinal reinforcement junction are provided with sealing-plug 10, sleeve
Ontology lower end opening is connected with reserved steel bar 6；Slurry outlet 12 and injected hole 13 are provided in sleeve body.Sleeve body inner wall is set
It is equipped with the shear connector of interlaced arrangement.The setting of slurry outlet 12 of sleeve 2 is connected on sleeve body top, injected hole 13 is arranged in sleeve
Body lower part.Sleeve body both ends Bar Anchorage built-in length is not less than 8 times of reinforcing bar nominal diameters；Sleeve body overall length is not less than
18 times of reinforcing bar nominal diameters；Sleeve body outer diameter is not less than 2.5 times of reinforcing bar nominal diameters.
Preferably, concrete filler strip 4 is provided on bottom plate 3, concrete filler strip 4 is arranged in 1 bottom periphery of column, concrete
The grouting material 11 is filled in the section that filler strip 4 surrounds.
The bottom plate 3 is splicing structure comprising can be assembled into the first precast concrete of rectangular parallelepiped structure
It is provided on 7a and the second precast concrete 7b, the first precast concrete 7a and the second precast concrete 7b
Perforative presstressed reinforcing steel preformed hole 9, the first precast concrete 7a and the second precast concrete 7b pass through presstressed reinforcing steel
Preformed hole 9 carries out prestressing force connection.Presstressed reinforcing steel preformed hole 9 is formed by bellows is prefabricated.
Preferably, the first precast concrete 7a be L-type, the second precast concrete 7b be it is inverted T shaped,
The Components Shape that he can be assembled into rectangular parallelepiped structure can also be with；Second precast concrete 7b setting is pre- in centre, first
Concrete component 7a processed is arranged in the second two sides precast concrete 7b；Institute is arranged in second upper surface precast concrete 7b
State reserved steel bar 6.
The density section of lightweight aggregate concrete is 1500kg/m3~1950kg/m3；According to units/kg/m3, lightweight aggregate coagulation
Soil includes the raw material of following proportion:
Cement: fine aggregate: light coarse aggregate: flyash: silicon powder: high efficiency water reducing agent: water=(285~315): (645~
675): (630~660): (175~195): (45~55): (4.20~4.35): (155~172), preferably 298:662:
645:187:50:4.28:165.
The present invention also provides a kind of construction methods on lightness prefabricated assembled concrete sheet-pile basis, including following step
It is rapid:
1) component of lightweight aggregate concrete pre-formed bottom plate 3 and column 1 is used, 1 longitudinal reinforcement bottom side of central post needs
Connection sleeve 2 is preset, the reserved steel bar 6 of bottom plate 3 should stretch out sufficient length；
2) first assembled bottom plate 3 at the construction field (site), further according to the position of reserved steel bar 6, hoisting upright column 1 keeps itself and bottom plate whole
3 combinations；Concrete filler strip 4 is installed；
3) grouting material 11 is perfused into connection sleeve 2, outflow is until fill up mixed after grouting material 11 fills up connection 2 inside of sleeve
Region between solidifying soil filler strip 4.
Specifically, referring to Fig. 1 and Fig. 2, the present invention mainly includes Hollow Lightweight Concrete Block or solid column 1 in structure
With lightweight aggregate concrete can assembled bottom plate 3, entirety is connected to become by the connection progress reinforcing bar of sleeve 2 between the two；The longitudinal steel of column 1
Muscle end is connected with connection sleeve 2, and connection 2 bottom end of sleeve is concordant with 1 concrete bottom of column；Variable cross-section can be done at the top of column 1
Enlarged footing has enough sections to connect using foundation bolt or inserted angle steel with top shaft tower convenient for enlarged footing part.
Referring to Fig. 5, concrete filler strip 4 is arranged symmetrically on bottom plate 3, at enclosing square；Bottom plate 3 is by the first precast concrete
Component 7a and the second precast concrete 7b are spliced, and carry out prestressing force connection by presstressed reinforcing steel preformed hole 9 therebetween；The
The reinforcing bar 6 of certain length is stretched out at two centers precast concrete 7b, and reinforcing bar extension elongation meets reinforcing bar connection request.
Referring to fig. 4, column is connect with connection tube-in-tube structure as shown, reserved steel bar 6 connect reinforcing bar with column 1 with bottom plate
It is attached by connecting sleeve 2；Slurry outlet 12 is located at column connection reinforcing bar side, and injected hole 13 is located at reserved steel bar side,
A sealing-plug 10 is installed between column 1, connection sleeve 2 and reinforcing bar.
Referring to fig. 4, bottom plate splicing is carried out using prefabricated lightweight aggregate concrete lath 7 as shown in the figure, wherein first is prefabricated
Concrete component 7a can also symmetrically be split as two parts again；Second precast concrete 7b is whole directly to be connected with basic stand column
It connects, is reserved with connection reinforcing bar 6；First precast concrete 7a is arranged symmetrically in the second two sides precast concrete 7b,
Ultimately form bottom plate entirety；Preformed hole 9 is along the lateral symmetry distribution of lath, wherein intermediate presstressed reinforcing steel reserves pitch of holes not less than vertical
Column dimension, presstressed reinforcing steel preformed hole are formed by bellows is prefabricated；After the completion of bottom plate splicing, carried out by presstressed reinforcing steel preformed hole 9
Presstressed reinforcing steel construction, makes bottom plate form reliable entirety.
Wherein, the longitudinal reinforcement bottom of precast hollow or solid column 1 be connected with connection sleeve 2, connection sleeve bottom end with
Column concrete bottom is held level with both hands together；Bottom plate 3 stretches out the reinforcing bar 6 of certain length, and be in the milk by connection sleeve connect into column it is whole
Body.
Lightweight aggregate concrete is by light coarse aggregate, light weight sand or normal sands, cement, cementitious material flyash, silicon powder or slag
Deng, the concrete that is formulated of high-performance water reducing agent and water.
Described 2 one end of connection sleeve is connect with column reinforcing bar, the other end and column concrete bottom are held level with both hands together, close to column
Bottom end is there are injected hole, and there are slurry outlets on top.
The bottom plate 3 is made of the prefabricated lath 7a and 7b of lightweight aggregate concrete of two kinds of patterns, and component 7b passes through reserved
Reinforcing bar 6 is directly connect with basic stand column, and component 7a is arranged symmetrically in the two sides 7b and splices integral, passes through presstressed reinforcing steel preformed hole
9 carry out presstressed reinforcing steel construction.
Prefabricated lath 7a and 7b have been arranged symmetrically the precast prestressed muscle preformed hole of bellows at the identical height in section, prefabricated
Different sole plate width can be arranged in such a way that continuous overturning is superimposed in lath 7a.
Hollow or solid 1 top cross-section of column is big compared with its lower section size, forms variable cross-section enlarged footing form.
The prefabricated assembled basic specific implementation process of lightness of the present invention is as follows:
(1) lightweight aggregate concrete element precast
The amount of lightweight aggregate concrete side needed for being calculated according to basic engineering drawing carries out material according to required strength grade and claims
Weight；Banding steel cage, support template are segmented according to basic engineering drawing；Column longitudinal reinforcement bottom side need to connect sleeve in advance, even
Sealing-plug is installed between female connector cylinder and column reinforcing bar, and holds connection sleeve bottom surface with pouring molding rear column concrete bottom level with both hands
Together；Bottom plate should ensure that assembling part coincide；Baseplate reinforcing bar should stretch out sufficient length, and should keep with column longitudinal reinforcement plan-position
Unanimously.
According to the prefabricated assembled basis lightweight aggregate concrete preparation method, prepares lightweight aggregate concrete and pour component
And it is conserved to required intensity.
(2) basic transport and assembling
Prefabricated lightweight aggregate concrete component conveying to construction site, excavation of foundation pit and levelling, hole bottom it is smooth it is closely knit after i.e.
It can start to assemble.Lifting concrete slab 7b first to just rear symmetrical lifting concrete slab 7a, and makes to bottom of foundation ditch center
Bottom plate each section closely leans on real, assembled outgoing interface to coincide；Carrying out the construction of presstressed reinforcing steel 5 makes bottom plate assembly become whole, guarantees bottom
Plate cooperative bearing；According to the position of reserved steel bar 6, hoisting upright column 1 combines it with bottom plate whole 3；Concrete filler strip 4 is installed.
Grouting should use special equipment, and strictly prepare grouting material 11 by regulation matching method, by prepared grouting material
It pours into special equipment after mixing evenly, guarantees the slump of grouting material；Grouting material should be finished in 0.5h after preparation.
Pressure grouting is carried out by injected hole 13 using grouting equipment, grouting material will be from pulp after filling up connection sleeve inner
It flows out in hole 12；To make to connect sleeve inner full of existing between grouting material, guarantee column 1 and bottom plate 3 without clear gap, should make to fill
Slurry is continuously outflowed from slurry outlet, until filling up region between concrete filler strip 4, surface is levelling.
Embodiment 1
A kind of lightness prefabricated assembled concrete sheet-pile basis of the present invention, including prefabricated lightweight aggregate concrete basic stand column
With sliceable bottom plate, assembled by presstressed reinforcing steel between bottom plate, bottom plate is entirely through the grouting of connection sleeve and basic stand column
Connection.
A kind of lightweight aggregate concrete on prefabricated assembled basis, intensity are not less than LC30 grades, and seepage-resistant grade is not less than P4, close
Degree section is 1500kg/m3~1950kg/m3.By taking LC35 grades of lightweight aggregate concretes as an example, match ratio is (unit: kg/m3):
Cement: fine aggregate: light coarse aggregate: flyash: silicon powder: high efficiency water reducing agent: water=298:662:645:187:50:
4.28:165.
The P.O 42.5R ordinary portland cement of the cement selection quality stabilization, better performances, needs and gathers before use
Carboxylic acid series high-performance dehydragent carries out compatibility test, and cement performance should be not less than " common portland cement " (GB 175-
2007) related request.
Thick river sand during the fine aggregate selection quality is hard, particle is round and smooth, gradation is good, quality should be not less than
" regular concrete sand, Shi Zhiliang and test method standard " (JC/T 52-2006) and " building sand " (GB/T 14684-
2011) related request.
The rubble haydite that the light coarse aggregate selection density rating is 800 grades, continuous size fraction, quality should be not less than
" light-weight aggregate and its test method part 1: light-weight aggregate " (GB/T 17431.1-2010) related request.
The flyash selects high-quality I grade of flyash of the advanced power plant's production of coal burning process, and quality should be not less than
" for the flyash in cement and concrete " (GB/T 1596-2017) related request.
The silicon powder selects the high-quality silicon powder of the advanced plant produced of smelting process, quality should not less than " mortar and
Concrete silicon ash " (GB/T 27690-2011) related request.
The high efficiency water reducing agent selects the polycarboxylate high performance water-reducing agent containing air entraining agent, and water-reducing rate should be not less than
25%, air content is not less than 8%, and its quality should be not less than " Technical code for application of admixture in concrete " (GB 50119-
2013) with " polycarboxylate high performance water-reducing agent " (JG/T 223-2017) related request.
The concrete mixing wet concentration tap water, quality should be not less than " concrete water standard " (JGJ 63-
2006) related request.
The component formula of other embodiments is given below:
| Embodiment | Cement | Fine aggregate | Light coarse aggregate | Flyash: | Silicon powder | High efficiency water reducing agent: | Water |
| Embodiment 2 | 285 | 675 | 630 | 195 | 55 | 4.20 | 172 |
| Embodiment 3 | 315 | 645 | 660 | 175 | 45 | 4.35 | 172 |
| Embodiment 4 | 286 | 660 | 650 | 180 | 50 | 4.25 | 160 |
| Embodiment 5 | 10 | 670 | 640 | 190 | 48 | 4.3 | 170 |
The present invention also provides a kind of lightweight aggregate concrete preparation methods on prefabricated assembled basis, and specific process step is such as
Under:
A) by the polycarboxylate high performance water-reducing agent 4.28kg/m containing air entraining agent3Admix load weighted water 165kg/m3In, and
It is slowly stirred two minutes；
B) 298kg/m is weighed according to weight ratio3Cement, 662kg/m3Fine aggregate, 645kg/m3Coarse aggregate,
187kg/m3Flyash and 50kg/m3Silicon powder；
C) load weighted cement, flyash and silicon powder are sequentially added into forced mixer, uniform stirring 3~4 minutes, added
Enter about 1/4 by the resulting mixture of step a, stir about 2~3 minutes；
D) load weighted fine aggregate is added, is added about 1/4 by the resulting mixture of step a, stirs 1~2 minute；
E) load weighted coarse aggregate is added, is added about 1/4 by the resulting mixture of step a, stirs 1~2 minute；
F) the remaining mixture of step a is added, uniform stirring 3~4 minutes, discharging obtained prepared concrete mix.
A kind of grouting for prefabricated assembled basis of the present invention connects sleeve, and inner wall is equipped with the shearing of interlaced arrangement
Key, connection sleeve one end are connected with the vertical muscle of prefabricated stand column and install sealing-plug, and open at one end is connected with reserved steel bar；With column
Connecting pin nearby sets slurry outlet, nearby sets injected hole with baseplate reinforcing bar connected end；Prefabricated stand column and prefabricated panel pass through connector sleeve
Cylinder, pours into high-strength grout and is attached.
The connection sleeve can be used spheroidal graphite cast-iron essence casting and form, and quality should be not less than " reinforcing bar connection grouting connects
Female connector cylinder " (JG/T 398-2012) related request, 1.2 times of connected Steel Bar Tensile Strengths should be not less than by connecting sleeve tensile strength,
And no less than 600MPa.
The connection sleeve both ends Bar Anchorage built-in length is not preferably less than 8 times of reinforcing bar nominal diameters；It is total to connect sleeve
It is long not to be preferably less than 18 times of reinforcing bar nominal diameters；It connects sleeve outer diameter and is not preferably less than 2.5 times of reinforcing bar nominal diameters.
Cement used in the grouting material is P.O 42.5R ordinary portland cement, and water-reducing agent used is containing air entraining agent
Polycarboxylate high performance water-reducing agent, quality should be identical as used in lightweight aggregate concrete.
Its 1d intensity of the grouting material should be not less than 35MPa, and 3d intensity should be not less than 60MPa.
Prefabricated assembled basis of the invention can assembled bottom plate, be made of the precast concrete lath of two kinds of patterns,
Transversal cross-section same position is arranged symmetrically four connecting holes, by the prefabricated formation of bellows.
The lightweight aggregate concrete that basis of the invention uses is greatly improved the endurance quality on basis, energy saving and resource,
Reduce the pressure to environment；By connecting sleeve connection prefabricated components, guarantees the globality of precast construction, construction effect can be improved
Rate；The whole weight reduction in present invention basis, prefabricated components size reduce, and save transportation cost and reduce hoisting difficulty；It adopts
With prefabricated components can shorten construction period, guarantee concrete pouring quality, and reduce unfavorable foundation foundation pit construction difficulty and
Security risk, broadening assembling type base are being had inconvenient traffic and the application range under severe environmental conditions.
Claims (10)
1. a kind of lightness prefabricated assembled concrete sheet-pile basis characterized by comprising
Bottom plate (3), bottom plate (3) are splicing structure；Bottom plate (3) upper surface is extended with reserved steel bar (6)；
Column (1), the column (1) is hollow or solid construction；The longitudinal reinforcement bottom of column (1) is connected with connection sleeve
(2), connection sleeve (2) lower end is connect with reserved steel bar (6), fills grouting material (11) in connection sleeve (2), column (1) and bottom
Plate (3) is connected integral by connection sleeve (2) and grouting material (11)；
And concrete filler strip (4), the concrete filler strip (4) are arranged on bottom plate (3) and are located at column (1) bottom periphery,
The grouting material (11) is filled in the region that concrete filler strip (4) surrounds；
The bottom plate (3) and column (1) is formed by lightweight aggregate concrete and reinforcing bar are prefabricated.
2. lightness prefabricated assembled concrete sheet-pile basis according to claim 1, which is characterized in that the connection
Sleeve (2) bottom end is concordant with column (1) bottom end, and reserved steel bar (6) protrudes into connection sleeve (2).
3. lightness prefabricated assembled concrete sheet-pile basis according to claim 1, which is characterized in that the connection
Sleeve (2) includes sleeve body, and sleeve body upper end and longitudinal reinforcement junction are provided with sealing-plug (10), sleeve body lower end
Opening is connected with reserved steel bar (6)；Slurry outlet (12) and injected hole (13) are provided in sleeve body.
4. lightness prefabricated assembled concrete sheet-pile basis according to claim 3, which is characterized in that the sleeve
Inner body wall is provided with the shear connector of interlaced arrangement.
5. lightness prefabricated assembled concrete sheet-pile basis according to claim 3, which is characterized in that the connection
On sleeve body top, injected hole (13) is arranged in sleeve body lower part for slurry outlet (12) setting of sleeve (2).
6. lightness prefabricated assembled concrete sheet-pile basis according to claim 3, which is characterized in that the sleeve
Ontology both ends Bar Anchorage built-in length is not less than 8 times of reinforcing bar nominal diameters；Sleeve body overall length is not less than 18 times of reinforcing bar nominals
Diameter；Sleeve body outer diameter is not less than 2.5 times of reinforcing bar nominal diameters.
7. lightness prefabricated assembled concrete sheet-pile basis according to claim 1, which is characterized in that the bottom plate
(3) be splicing structure comprising can be assembled into rectangular parallelepiped structure the first precast concrete (7a) and second it is prefabricated mix
Soil component (7b) is coagulated, is provided on the first precast concrete (7a) and the second precast concrete (7b) perforative pre-
Stress rib preformed hole (9), the first precast concrete (7a) and the second precast concrete (7b) are pre- by presstressed reinforcing steel
Box out (9) carry out prestressing force connection.
8. lightness prefabricated assembled concrete sheet-pile basis according to claim 7, which is characterized in that described first
Precast concrete (7a) is L-type, and the second precast concrete (7b) is inverted T shaped；Second precast concrete (7b)
Setting is arranged in centre, the first precast concrete (7a) in the two sides the second precast concrete (7b)；Second is prefabricated mixed
The reserved steel bar (6) is arranged in the solidifying soil component upper surface (7b).
9. lightness prefabricated assembled concrete sheet-pile basis according to claim 1, which is characterized in that the light bone
The density section for expecting concrete is 1500kg/m3~1950kg/m3；According to units/kg/m3, lightweight aggregate concrete includes matching below
The raw material of ratio:
Cement: fine aggregate: light coarse aggregate: flyash: silicon powder: water-reducing agent: water=(285~315): (645~675): (630~
660): (175~195): (45~55): (4.20~4.35): (155~172).
10. the construction method on lightness prefabricated assembled concrete sheet-pile as claimed in any one of claims 1 to 9 basis,
Characterized by comprising the following steps:
1) component of the pre-formed bottom plate of lightweight aggregate concrete (3) and column (1), central post (1) longitudinal reinforcement bottom side are used
Connection sleeve (2) need to be preset, the reserved steel bar (6) of bottom plate (3) should stretch out sufficient length；
2) first assembled bottom plate (3) at the construction field (site), further according to the position of reserved steel bar (6), hoisting upright column (1) keeps it whole with bottom plate
Body (3) combination；And concrete filler strip (4) are installed；
3) grouting material (11) are perfused into connection sleeve (2), outflow is until fill out after grouting material (11) fills up connection sleeve (2) inside
Region between full concrete filler strip (4).
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| CN112881141A (en) * | 2021-01-06 | 2021-06-01 | 清华大学 | Reinforced concrete member test model and test method thereof |
| CN113756357A (en) * | 2021-08-10 | 2021-12-07 | 山东电力工程咨询院有限公司 | Assembly type plate foundation adopting hollow bottom plate and method |
| WO2022088398A1 (en) * | 2020-10-27 | 2022-05-05 | 国网甘肃省电力公司经济技术研究院 | High-substitution-rate lightweight aggregate concrete for frozen soil area and preparation method therefor |
| CN115369910A (en) * | 2022-06-29 | 2022-11-22 | 安徽华电工程咨询设计有限公司 | Assembly type column lower independent foundation of post-tensioned pre-stressed assembled transformer substation and design method thereof |
| CN115680014A (en) * | 2022-12-21 | 2023-02-03 | 中国电建集团山东电力建设第一工程有限公司 | Mortise and tenon joint structure prestress assembly type foundation structure and construction method thereof |
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| CN115369910A (en) * | 2022-06-29 | 2022-11-22 | 安徽华电工程咨询设计有限公司 | Assembly type column lower independent foundation of post-tensioned pre-stressed assembled transformer substation and design method thereof |
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