CN109944240A - Prefabricated tubbiness foundation structure and its construction method and device are implanted into after large-diameter annual stirring grooving - Google Patents
Prefabricated tubbiness foundation structure and its construction method and device are implanted into after large-diameter annual stirring grooving Download PDFInfo
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- CN109944240A CN109944240A CN201910224139.7A CN201910224139A CN109944240A CN 109944240 A CN109944240 A CN 109944240A CN 201910224139 A CN201910224139 A CN 201910224139A CN 109944240 A CN109944240 A CN 109944240A
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Abstract
It is implanted into prefabricated tubbiness foundation structure and its construction method and device after stirring grooving the invention discloses a kind of large-diameter annual, belongs to foundation field.The foundation structure includes several cement mixing piles and the prefabricated circular ring shape tubular pole of a major diameter.All cement mixing piles are along circular arrangement on ground level, and adjacent cement mixing pile is mutually twisted linking, and the soft underground succeeding vat of end to end circular ring shape can be formed before cement does not solidify completely；Prefabricated circular ring shape tubular pole made of concrete is inserted in the succeeding vat of underground perpendicular to the ground；Prefabricated circular ring shape tubular pole outboard sidewalls are combined closely with mixing pile by filling concrete soil, and the waterproof tubbiness basis of closed entirety is formed after theing cement solidifies.The present invention also improves existing mixing pile machine, and the stirring drilling agitating device after improvement can form the soft underground succeeding vat of annular of major diameter in soft soil foundation.Foundation structure of the invention can greatly play the carrying effect of the soil body in closure range, compensate for that traditional prefabricated tubular pile diameter is small, defect of low bearing capacity simultaneously because cross-sectional area is larger has preferable anti-seismic performance relative to single-pile foundation.
Description
Technical field
The invention belongs to foundation fields, and in particular to be implanted into prefabricated tubbiness base after a kind of stirring grooving of large-diameter annual
Plinth structure and its construction method and device.
Background technique
Two kinds of pile foundations being most widely used in building trade at present are prefabricated tubular pile and cast-in-situ bored pile.Wherein,
Prefabricated tubular pile basis diameter is smaller, and bearing capacity of single pile is lower, generally within the scope of 400-500KN, the prefabricated tubular pile of major diameter by
It is more demanding and more rare in construction equipment.In order to improve the bearing capacity on prefabricated tubular pile basis, it has to increase tubular pole
Construction depth, the problems such as thus bringing again and be not easy piling, broken pile, or generate huge construction noise when piling.Drill-pouring
Stake is relatively large in diameter, and bearing capacity is higher, and generally in 1000-2000KN range, but its required duration of constructing is longer, operating expenses height,
The problems such as construction quality is not easy to control, and when concrete cast in situs is easy to appear isolation, necking down and pile bottom sediment are thick.Therefore,
Two kinds of current common pile-type are not easy to realize the requirement of major diameter high-bearing capacity, and certain defect is individually present.
All drilling rods of existing list (three) axis mixing pile machine are kelly (drive shaft), i.e., drilling rod is directly and motor
It is mutually connected in when drilling to weak foundation soil, the lesser single circular groove of diameter can only be drilled out, and the ring of major diameter can not be formed
Shape soil box, therefore the application of existing list (three) axis mixing pile machine has certain limitations.
For this purpose, the characteristics of combining existing pile foundation, a kind of prefabricated tubbiness basis of major diameter annular and construction method, energy are designed
Enough realize the tubbiness basis that major diameter high-bearing capacity requires, it can be from the aspect of following three:
First, in order to improve foundation bearing capacity, the interaction on basis with foundation soil is needed to be improved, plays the soil body as far as possible certainly
The carrying of body acts on, to improve foundation bearing capacity under the premise of not increasing construction material.Previous pile foundation, inter-pile soil hair
The carrying effect waved is extremely limited, main reason is that the soil body is being squeezed by easy lateral deformation, if it is possible to by the soil body
It is enclosed in basic internal, the carrying that inter-pile soil is greatly improved is acted on, while reducing soil body sedimentation.
Second, major diameter prefabricated tubular pile is generally difficult to dozen (pressure) and enters in ground, is due to resistance suffered during setting
Power is too big, if it is possible to pre-process before pile foundation is set to ground, form soft boundary, it will it is prefabricated to be conducive to major diameter
The work progress of pile foundation.
Third, uniaxial mixing pile machine or three axes agitating pile machine can pre-process foundation soil body, can stir foundation soil body
Soft, and sprayable cement simultaneously is mixed, is mixed with the soil body, can be improved the anti-permeability performance and load-carrying properties of the soil body.However, the two
Size specifically soft boundary can not be formed.By way of increasing drill bit, existing uniaxial mixing pile machine is suitably changed
Into can produce the annular soil box of ring-type of major diameter.
Summary of the invention
In view of the carrying effect of foundation soil plays not enough, ground integrated carrying can be improved by the closing soil body
Power devises a kind of major diameter ring seal tubbiness basis；Simultaneously, it is contemplated that major diameter basis is not easily accessible in foundation soil body,
Therefore a kind of constructing device and construction method for generating annular enclosed mollisol boundary is devised.The object of the invention is that solution
The defect that certainly existing foundation bearing capacity is insufficient, construction is inconvenient, and a kind of stirring grooving plug-in type Prefabricated composite case is provided
Foundation structure.
The present invention solve concrete technical problems the technical solution adopted is that:
Prefabricated tubbiness foundation structure is implanted into after a kind of stirring grooving of large-diameter annual comprising in several insertion grounds
Mixing pile, all mixing piles are along circular arrangement on ground level, and adjacent mixing pile is mutually twisted linking, forms head and the tail
The continuous slot structure in the underground of the circular ring shape to connect；It is inserted with perpendicular to the ground in the continuous slot structure in the underground pre- made of concrete
Rounding annular tubular pole, and the internal diameter of prefabricated circular ring shape tubular pole is greater than the internal diameter of the continuous slot structure in underground, prefabricated circular ring shape tubular pole
Outer diameter is less than the outer diameter of the continuous slot structure in underground；The prefabricated circular ring shape tubular pole outboard sidewalls and mixing pile boundary pass through filling water
Soil is combined closely.
Prefabricated circular ring shape tubular pole in the present invention refers to the tubular pole made in the factory in advance, and the cross section of tubular pole is
Circular ring shape.
Preferably, the seperated dress that the prefabricated circular ring shape tubular pole is composed of multiple precast concrete arc components
With formula tubular pole, one end of each precast concrete arc component is equipped with strip rectangular protrusions, and the other end is equipped with can be with the strip
The strip groove of rectangular protrusions cooperation, the multiple precast concrete arc component are sequentially engaged, and form end to end closing
Annular pile body.
Preferably, the prefabricated circular ring shape tubular pole has multiple, one end of each prefabricated circular ring shape tubular pole is equipped with ring-type
Protrusion, the other end are equipped with the annular recess that can cooperate with the circular protrusion, and multiple prefabricated circular ring shape tubular poles are suitable in short transverse
Secondary superposition connection.
Another object of the present invention is to provide one kind for manufacture be implanted into after the stirring grooving of above-mentioned large-diameter annual it is prefabricated
The cyclic annular stirring trough forming system of tubbiness foundation structure comprising kelly, drill bit, circular disk and driven drilling rod；Described
Kelly and driven drilling rod are circumferentially uniformly distributed along the disk body of circular disk, and the bottom of every kelly and driven drilling rod is respectively mounted
There is a drill bit；Two drill bits of two drilling rod bottoms of arbitrary neighborhood are in high infraversion malposition arrangement in short transverse, and two
Bit bore range is engaged in projecting direction part；Every kelly is sequentially connected with the output shaft of motor, and every driven
Drilling rod passes through bearing and is mounted on circular disk, and driven drilling rod constitutes cooperation transmission by driving member and kelly, by
Kelly drives remaining driven drilling rod to rotate synchronously.
Preferably, being cased with casing outside the kelly, the motor is installed on fixed bracket.
Preferably, the driving member is gear or chain.
Preferably, the drill bit is installed on kelly and driven drilling rod bottom with detachable form.
Preferably, the kelly is preferably not lower than 2 even numbers root, the disk body along circular disk is circumferentially uniform
The driven drilling rod quantity of distribution, the driving of every kelly is identical.
It is implanted into advance after stirring grooving another object of the present invention is to provide a kind of large-diameter annual using above-mentioned apparatus
Tubbing shape foundation structure construction method, its step are as follows:
Step 1 carries out spiral whitewashing to the target area soil body using the described cyclic annular stirring trough forming system from top to bottom and stirs
Drilling is mixed, mixes the foundation soil in stirring region with concrete mortar, each drill bit forms a filling water in ground
The mixing pile of soil, multiple mixing piles are mutually twisted, and form the continuous slot structure in underground of end to end circular ring shape；
Step 2, soil cement solidification before, multiple precast concrete arc components are sequentially inserted into the underground succeeding vat knot
In structure, combination forms closed prefabricated circular ring shape tubular pole；When depth direction has multiple prefabricated circular ring shape tubular poles, carry out one by one
Construction, and upper and lower two prefabricated circular ring shape tubular poles is made to pass through circular protrusion and annular recess snap-fit；
Step 3, after prefabricated circular ring shape tubular pole is inserted into scheduled soil body depth, in foundation surface casting concrete cushion cap,
It connect prefabricated circular ring shape tubular pole top with cushion cap integral, forms prefabricated tubbiness foundation structure after solidification.
Preferably, the prefabricated circular ring shape tubular pole sinks to the soil cement of the continuous slot structure in underground by self gravity
In, or by natural compression be pressed into the continuous slot structure in underground soil cement in.
Beneficial effects of the present invention are as follows:
1. the present invention, which can form a major diameter tubbiness basis, has bigger lateral stiffness relative to single-pile foundation,
Therefore the horizontal bearing capacity on basis can be improved；Relative to multi-column pier foundation, the present invention improves the overall stability on basis and resists
Shock stability.
2. the present invention improves traditional single (three) axis mixing pile machine, drill bit quantity is increased, can be drilled out in ground
The cyclic annular soil box of major diameter, increases the application range of mixing pile machine.
3. the present invention can give full play to the carrying effect for closing the soil body in ground, to reduce concrete amount, greatly
Basic vertical bearing capacity is improved, settlement of foundation is reduced.
4. the present invention compared with concrete solid tubular pole, not only can increase the contact area on basis with the soil body, but also cement
There is reinforcement effect to the native contact interface in basis-, while improving foundation bottom coefficient of bearing caoacity, greatly play the closing soil body
Carrying effect, greatly improves novel foundation vertical bearing capacity.Therefore, in the case where same bearer force request, institute of the present invention
The concrete amount needed greatly reduces, more energy conservation and environmental protection.
5. form of construction work of the invention is simple, concrete component can be prefabricated in the factory, easy to make；Main constructing device can
It is improved by traditional mixing pile machine, the technology maturation of Soil-cement grooving, difficulty of construction is smaller.
Detailed description of the invention
Fig. 1 is to be implanted into prefabricated tubbiness foundation structure schematic diagram after a kind of large-diameter annual stirs grooving；
Fig. 2 is that integrally formed prefabricated circular ring shape tubular pole is illustrated；
Fig. 3 is seperated fabricated prefabricated circular ring shape tubular pole signal；
Fig. 4 is longitudinal integrally formed prefabricated circular ring shape tubular pole signal；
Fig. 5 is the prefabricated circular ring shape tubular pole signal of longitudinal divisions assembly；
Fig. 6 is cyclic annular stirring trough forming system structural schematic diagram；
Fig. 7 is the circular disk structural schematic diagram (driving of four axis and transmission) being composed of 4 pieces of separate structures；
Fig. 8 is the drive mechanism schematic diagram of 20 drilling rods composition in embodiment；
Fig. 9 is to be implanted into prefabricated tubbiness foundation structure construction schematic diagram after large-diameter annual stirs grooving.
In figure: precast concrete arc component 1, prefabricated circular ring shape tubular pole 2, strip rectangular protrusions 3, strip groove 4, ring-type
Protrusion 5, annular recess 6, ring-type stirring trough forming system 7, motor 8, kelly 9, drill bit 10, driving member 11, bearing 12, set
Pipe 13, circular disk 14, driven drilling rod 15, fixed bracket 16, the kelly 17 of separate structure, separate structure driven drilling rod
18, mixing pile 19.
Specific embodiment
The present invention is further described with implementation steps with reference to the accompanying drawing.
The present invention devises a kind of major diameter annular precast concrete tubbiness basis, and the soil body is enclosed in ring foundation,
The carrying effect of the soil body can greatly be played；Meanwhile increasing basic cross-sectional area using the closing soil body, to expand basis
The contact area of side and the soil body, and then also increase the bearing capacity on basis.In terms of construction machinery, to traditional mixing pile machine into
Row improvement can form the annular enclosed boundary of the soft easy insertion foundation precast elements of a circle.In addition, to increase basis-soil body circle
The frictional force in face, equipment stir the soil body during simultaneously jet cement, formed and held within the scope of basis-soil body contact interface
The better cement Soil Interface of effect is carried, last casting concrete cushion cap forms prefabricated pipe section, the closing soil body, soil cement and holds jointly
Carry the composite foundation of top-out structure.Below to specific foundation structure, constructing device, construction method three in terms of do further
It illustrates.
As shown in Figure 1, it is implanted into prefabricated tubbiness foundation structure after stirring grooving for one of the present embodiment large-diameter annual,
Its main structure includes the mixing pile 19 in several insertion grounds, and mixing pile 19 can be set by stirrings such as list (three) axis mixing pile machines
For to made of ground jet mixing, each mixing pile 19 is in circle pile-type.In terms of grade level angle, all mixing piles 19
Along circular arrangement on ground level, and adjacent mixing pile 19 is mutually twisted linking, and the perforation of adjacent studs body portion forms head and the tail
The soft continuous slot structure in underground connect, circular ring shape.While mixing plant is stirred foundation soil body, using drill bit
The mouth spray of bottom jet cement in soil, make cement and former foundation soil be uniformly mixed formed it is impervious it is more preferable, cohesive strength is stronger
Soil cement.Cement not completely solidify before can be equivalent to form a circle circular ring shape, easily be inserted into concrete prefabricated element
Closed boundary, the soft foundation soil on the boundary closed by soil cement, and the waterproof tubbiness of closed entirety is formed after theing cement solidifies
In the continuous slot structure in underground of the invention of basis, it is inserted with prefabricated circular ring shape tubular pole 2 made of concrete, and pre- rounding perpendicular to the ground
The internal diameter of annular tubular pole 2 is greater than the internal diameter of the continuous slot structure in underground, and the outer diameter of prefabricated circular ring shape tubular pole 2 is less than underground succeeding vat knot
The outer diameter of structure enables prefabricated circular ring shape tubular pole 2 to be smoothly inserted perpendicularly into the continuous slot structure in underground.Moreover, because underground
There is a large amount of soil cement in continuous slot structure, and the cross sectional dimensions of prefabricated circular ring shape tubular pole 2 is less than underground succeeding vat knot
Structure cross section, therefore there are certain space between prefabricated 2 outboard sidewalls of circular ring shape tubular pole and the foundation soil on 7 boundary of mixing pile,
Soil cement is filled in the space, cement soil layer can be used as transition zone, improve between foundation soil and concrete integral structure
Contact relation.The top of prefabricated circular ring shape tubular pole 2, which can according to need, pours top structures, such as cushion cap etc..
In the prefabricated tubbiness foundation structure, by the way that the soil body to be enclosed in prefabricated circular ring shape tubular pole, greatly play
The carrying of the soil body acts on；Meanwhile increasing basic cross-sectional area using the closing soil body, to expand connecing for side of the base plate and the soil body
Contacting surface product, and then also increase the bearing capacity on basis.In addition, stirring soil in equipment to increase basis-soil body interface frictional force
During body simultaneously jet cement, within the scope of basis-soil body contact interface formed the better cement Soil Interface of supporting effect,
Top structures are finally poured based on this, are formed prefabricated circular ring shape tubular pole, the closing soil body, soil cement and are carried top jointly and build
The composite foundation of building structure.
In above-mentioned prefabricated tubbiness foundation structure, if the size on basis is smaller, prefabricated circular ring shape tubular pole 2 can be used
Integrally formed integrated component, as shown in Figure 2.But if the size on basis is larger, the ring structure of major diameter is needed to form
When, integral forming technique is more difficult, then it is contemplated that using seperated assembled tubular pole as shown in Figure 3.One section of seperated assembly
Formula tubular pole is composed of multiple precast concrete arc components 1, and one end of each precast concrete arc component 1 is equipped with strip
Rectangular protrusions 3, the other end are equipped with the strip groove 4 that can cooperate with strip rectangular protrusions 3, strip rectangular protrusions 3 and strip groove 4
It is capable of forming Tenon cooperation.Therefore, whole prefabricated circular ring shape tubular pole 2 is split as multiple precast concrete arc components 1, it can
To reduce whole manufacture difficulty, cost is saved.After the completion of each precast concrete arc component 1 is prefabricated in the factory, it can be transported to
Then assembled in situ in basis is successively squeezed into construction site, multiple precast concrete arc components 1 are sequentially engaged, and forms head and the tail
Connected closed ring pile body.Performance identical with component is integrally formed can be integrally played after soil cement solidification.Certainly, have
Depending on construction demand, the assembly connection structure of arc component can also be adjusted body formed mode as needed.Meanwhile
It is contemplated that carrying out slip casting filling to the gap between strip rectangular protrusions 3 and strip groove 4, make its connection more closely, most
End form is at stable closed ring structure.
Likewise, when depth of foundation is shallower, prefabricated circular ring shape tubular pole 2 can be directly pre- since the depth on basis is indefinite
Corresponding length is made, as shown in Figure 4.But when depth of foundation is deeper, the longer prefabricated circular ring shape of single length is directlyed adopt
Tubular pole 2 its manufacture, transportation cost it is all higher, it can be considered to using multistage connecting method assemble.As shown in figure 5, i.e. prefabricated
Circular ring shape tubular pole 2 is divided into multistage, and one end of every section of prefabricated circular ring shape tubular pole 2 is equipped with circular protrusion 5, and the other end is equipped with can be with ring-type
The annular recess 6 that protrusion 5 cooperates, circular protrusion 5 are inserted into constituting in annular recess 6 and be cooperatively connected.Each section of prefabricated circular ring shape
After the completion of tubular pole 2 is prefabricated in the factory, it can be transported to construction site, then successively squeeze into assembled in situ in basis, multiple pre- roundings
Annular tubular pole 2 is sequentially superimposed connection by circular protrusion 5 and annular recess 6 in short transverse, gradually increases length, after connection
Total height is met the requirements.
Above-mentioned prefabricated circular ring shape tubular pole 2 can be formed by making the mold casting concrete of specific dimensions, if needed may be used
Reinforcing bar is added, improves the anti-crack ability of concrete component.
Currently, the annular section of jurisdiction of major diameter is widely used in the lining projects such as subway, tunnel, technology is more mature, but
It is not applied to foundation field.Conventional list (more) axis mixing pile machine can not can only be formed one by one or multiple drillings
Annular bore, efficiency is lower, and hole quality is not easily controlled.Therefore in the present invention, to conventional list (more) axis mixing pile machine
It is improved, devises multi-shaft stirring stake machine, the main purpose of improvement is that form the specific annular of size soft for drilling in ground
Weak soil boundary forms a kind of cyclic annular stirring trough forming system 7 that can directly drill out annular groove.As shown in fig. 6, the ring-type stirs into
Slot device 7 is mainly by kelly 9, drill bit 10, motor 8, driving member 11, bearing 12, casing 13, circular disk 14, driven brill
The compositions such as bar 15, fixed bracket 16.Circular disk 14 is an annular disk body, is circumferentially uniformly provided with mounting hole on disk body.
Kelly 9 and driven drilling rod 15 are circumferentially uniformly distributed along the disk body of circular disk 14, are positioned across mounting hole.Every is actively bored
The bottom of bar 9 and driven drilling rod 15 is mounted on a drill bit 10.Drill bit 10 is preferably installed on kelly 9 with detachable form
With driven 15 bottom of drilling rod, it is easy to remove and repair.Drill bit 10 is equipped with the mouth spray of connection grouting device, in the same of the stirring soil body
When, using tri-axial stirring equipment in soil jet cement, make cement and former foundation soil be uniformly mixed formed it is impervious more preferable, viscous
The poly- stronger soil cement of power.It should be noted that the driving method of kelly 9 and driven drilling rod 15, mounting means are different
's.Every kelly 9 is sequentially connected with the output shaft of motor 8, and motor 8 is installed on fixed bracket 16, kelly 9
10 rotary drilling of drill bit for rotating and driving lower part is driven by motor 8.The portion of external set of the stretching circular disk 14 of kelly 9
There is casing 13 to be protected.And driven drilling rod 15 itself is without power motor, but need to drive by kelly 9.Often
The driven drilling rod 15 of item is mounted in the mounting hole of circular disk 14 by bearing 12, and driven drilling rod 15 by driving member 11 with
Kelly 9 constitutes cooperation transmission, drives remaining driven drilling rod 15 to rotate synchronously by kelly 9.Driving member 11 can be tooth
Wheel or chain etc., as long as can be realized the transmission between two bars.Further, since prefabricated circular ring shape tubular pole 2 has centainly
Thickness, this requires two neighboring drill bit 10 drilling ranges to be engaged in projecting direction part, forms the mixing pile formed after drilling
Also it can be engaged, the thickness of occlusal position can accommodate prefabricated circular ring shape tubular pole 2.In order to realize this requirement, present invention design
The vertical extension of adjacent drill pipes is different, and two drill bits 10 of two drilling rod bottoms of arbitrary neighborhood are in high in short transverse
Infraversion malposition arrangement, and two drill bits 10 drill range in the occlusion of projecting direction part.In the present embodiment, along one on circular disk 14
A direction counts, and singular drill bit 10 is located above, and at a certain distance from the drill bit 10 of even numbers is located below, makes adjacent drill bit 10 not
It can collide, but its range that drills has coincidence.Under this way, during all drilling rods with boring at present, it is ensured that shape
At with the continuous slot structure in certain thickness underground.
In order to keep the stability of transmission, kelly 9 is preferably not lower than 2 even numbers root, along the disk of circular disk 14
Body is circumferentially uniformly distributed, and 15 quantity of driven drilling rod of every kelly 9 driving is identical.If in addition, circular disk diameter compared with
Hour, can for using monolithic construction, if but circular disk when being relatively large in diameter, can also be fabricated structure, i.e., as shown in Figure 7
(this figure is only the top view of drilling rod and disk, and bit profile is omitted) combines shape by muti-piece separate structure (showing 4 pieces in figure)
Disk is circularized, there is the kelly 17 of 1 separate structure and the driven brill of 2 separate structures in figure in every piece of separate structure
Bar 18 facilitates partition, construction transport.
In the present embodiment, as shown in figure 8,20 drilling rods are devised altogether in cyclic annular stirring trough forming system 7, wherein 4 are
Kelly 9 can disposably form 20 mixing piles 19.In the device driving member 11 using gear realize, way be
Gear is respectively set in equal height and positions on kelly 9 and driven drilling rod 15, and the gear in adjacent two bar is mutually nibbled
It closes.
Trough forming system 7 is stirred based on the ring-type, is implanted into prefabricated tubbiness base after stirring grooving to large-diameter annual shown in FIG. 1
The method that plinth structure is constructed, its step are as follows:
Step 1 is filled according to bit map/bitmap shown in Fig. 9 left figure, design and the cyclic annular stirring grooving of pre-production suitable dimension
Set 7, prefabricated circular ring shape tubular pole 2.Prefabricated 2 component of circular ring shape tubular pole is formed by making the mold casting concrete of specific dimensions,
The anti-crack ability that reinforcing bar improves concrete component can be added.
Step 2 carries out spiral whitewashing stirring brill using ring-type stirring trough forming system 7 from top to bottom to the target area soil body
Hole, while agitating by the mouth spray on drill bit constantly into foundation soil shotcrete, make the ground in stirring region
Base soil is mixed with concrete mortar.Each drill bit 10 forms the mixing pile 19 of a filling concrete soil in ground, multiple to stir
It mixes stake 19 to be mutually twisted, the continuous slot structure in underground of end to end circular ring shape is formed, as shown in the middle figure of Fig. 9.At this point, ground
Continuous slot structure forms the annulus Shape closed mollisol boundary of a circle specific dimensions in ground down, facilitates insertion into precast concrete
Circular ring shape tubular pole.The depth of each mixing pile can pierce in supporting course when needing according to being actually adjusted, and improve whole stake
Hold bearing capacity.
Step 2, soil cement solidification before, multiple precast concrete arc components 1 are sequentially inserted into the continuous slot structure in underground
In, so that multiple precast concrete arc components 1 are engaged from beginning to end by strip rectangular protrusions 3 and strip groove 4, combination forms envelope
The prefabricated circular ring shape tubular pole 2 closed, as shown in Fig. 9 right figure.When depth direction have multiple prefabricated circular ring shape tubular poles 2 when, one by one into
Capable construction, and upper and lower two prefabricated circular ring shape tubular poles 2 is made to pass through 6 snap-fit of circular protrusion 5 and annular recess.Certainly if it is
Integrated prefabricated circular ring shape tubular pole 2, then can be inserted directly into, without assembly.
Inserted mode: if soft soil, being inserted into using by the self weight of prefabricated circular ring shape tubular pole 2, if soil layer relative rigid,
External force indentation can then be applied.
Step 3, after prefabricated circular ring shape tubular pole 2 is inserted into scheduled soil body depth, prefabricated circular ring shape tubular pole 2 extends slightly from ground
Table.Then prefabricated 2 top of circular ring shape tubular pole can be made to connect with cushion cap integral in foundation surface casting concrete cushion cap,
Prefabricated tubbiness foundation structure is formed after solidification.
The present invention is through the above technical solutions, design a kind of major diameter that can efficiently use closing soil body bearing capacity
Prefabricated tubbiness basis, can be greatly improved the vertical and horizontal direction bearing capacity on basis with ground, reduce concrete amount, and mention
The whole anti-seismic performance of higher baseline and top-out structure.Principle is simple and reliable, and construction method is easy, and applicable working condition is extensive, by
Construction condition influences smaller；It can be improved the safety and stability of building structure, and there is certain effects of energy conservation and environmental protection.
Above-mentioned embodiment is only a preferred solution of the present invention, so it is not intended to limiting the invention.Have
The those of ordinary skill for closing technical field can also make various changes without departing from the spirit and scope of the present invention
Change and modification.For example, shape, size, manner of prefabricated ring-type section of jurisdiction etc. can require to be changed according to Practical Project.
Therefore all mode technical solutions obtained for taking equivalent substitution or equivalent transformation, fall within the scope of protection of the present invention.
Claims (10)
1. being implanted into prefabricated tubbiness foundation structure after a kind of large-diameter annual stirring grooving, which is characterized in that including several insertions
Cement mixing pile (19) in ground, all mixing piles (19) on ground level along circular arrangement, and adjacent mixing pile
(19) it is mutually twisted linking, forms the continuous slot structure in underground of end to end circular ring shape；In the continuous slot structure in the underground
It is inserted with prefabricated circular ring shape tubular pole (2) made of concrete perpendicular to the ground, and the internal diameter of prefabricated circular ring shape tubular pole (2) connects greater than underground
The internal diameter of continuous slot structure, the outer diameter of prefabricated circular ring shape tubular pole (2) are less than the outer diameter of the continuous slot structure in underground；The prefabricated circular ring shape
Tubular pole (2) outboard sidewalls are combined closely with mixing pile (19) boundary by filling concrete soil.
2. being implanted into prefabricated tubbiness foundation structure after large-diameter annual stirring grooving as described in claim 1, which is characterized in that institute
The seperated assembled tubular pole that the prefabricated circular ring shape tubular pole (2) stated is composed of multiple precast concrete arc components (1), each
One end of precast concrete arc component (1) is equipped with strip rectangular protrusions (3), and the other end is equipped with can be with the strip rectangular protrusions
(3) strip groove (4) cooperated, the multiple precast concrete arc component (1) are sequentially engaged, and form end to end closing
Annular pile body.
3. being implanted into prefabricated tubbiness foundation structure after large-diameter annual stirring grooving as described in claim 1, which is characterized in that institute
The prefabricated circular ring shape tubular pole (2) stated has multiple, and one end of each prefabricated circular ring shape tubular pole (2) is equipped with circular protrusion (5), the other end
Equipped with can with the circular protrusion (5) cooperate annular recess (6), multiple prefabricated circular ring shape tubular poles (2) short transverse sequentially
Superposition connection.
4. a kind of for manufacturing the ring for being implanted into prefabricated tubbiness foundation structure after large-diameter annual as described in claim 1 stirring grooving
Shape stirs trough forming system, which is characterized in that including kelly (9), drill bit (10), circular disk (14) and driven drilling rod
(15)；The kelly (9) and driven drilling rod (15) is circumferentially uniformly distributed along the disk body of circular disk (14), every kelly
(9) and the bottom of driven drilling rod (15) is mounted on a drill bit (10)；Two drill bits of two drilling rod bottoms of arbitrary neighborhood
It (10) is in high infraversion malposition arrangement in short transverse, and two drill bit (10) drilling ranges are engaged in projecting direction part；Every
Kelly (9) is sequentially connected with the output shaft of motor (8), and every driven drilling rod (15) is mounted on ring by bearing (12)
On shape disk (14), and driven drilling rod (15) constitutes cooperation transmission by driving member (11) and kelly (9), by kelly
(9) remaining driven drilling rod (15) is driven to rotate synchronously.
5. cyclic annular stirring trough forming system as claimed in claim 4, which is characterized in that be cased with outside the kelly (9)
Casing (13), the motor (8) are installed on fixed bracket (16).
6. cyclic annular stirring trough forming system as claimed in claim 4, which is characterized in that the driving member (11) is gear or chain
Item.
7. cyclic annular stirring trough forming system as claimed in claim 4, which is characterized in that the drill bit (10) is with detachable form
It is installed on kelly (9) and driven drilling rod (15) bottom.
8. cyclic annular stirring trough forming system as claimed in claim 4, which is characterized in that the kelly (9) is preferably not
Even numbers root lower than 2, the disk body along circular disk (14) are circumferentially uniformly distributed, the driven drilling rod of every kelly (9) driving
(15) quantity is identical.
9. being implanted into prefabricated tubbiness foundation structure after a kind of large-diameter annual stirring grooving using device as claimed in claim 4 to apply
Work method, which is characterized in that steps are as follows:
Step 1 carries out spiral whitewashing stirring to the target area soil body using cyclic annular stirring trough forming system (7) from top to bottom
Drilling, mixes the foundation soil in stirring region with concrete mortar, each drill bit (10) forms a filling in ground
The mixing pile (19) of soil cement, multiple mixing piles (19) are mutually twisted, and form the underground succeeding vat knot of end to end circular ring shape
Structure；
Step 2, soil cement solidification before, multiple precast concrete arc components (1) are sequentially inserted into the underground succeeding vat knot
In structure, combination forms closed prefabricated circular ring shape tubular pole (2)；When depth direction has multiple prefabricated circular ring shape tubular pole (2), by
It is a to construct, and upper and lower two prefabricated circular ring shape tubular poles (2) is made to pass through circular protrusion (5) and annular recess (6) snap-fit；
Step 3 after prefabricated circular ring shape tubular pole (2) is inserted into scheduled soil body depth, in foundation surface casting concrete cushion cap, makes
It is connect with cushion cap integral at the top of prefabricated circular ring shape tubular pole (2), forms prefabricated tubbiness foundation structure after solidification.
10. construction method as claimed in claim 9, which is characterized in that the prefabricated circular ring shape tubular pole (2) passes through itself weight
Power is sunk in the soil cement of the continuous slot structure in underground, or is pressed into the soil cement of the continuous slot structure in underground by natural compression.
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| CN111005737A (en) * | 2019-12-28 | 2020-04-14 | 上海建旗建筑工程设计有限公司 | Tunnel type prestressed pipe curtain structure and construction method |
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| CN114134882A (en) * | 2021-11-12 | 2022-03-04 | 中国华能集团清洁能源技术研究院有限公司 | Wind power prefabricated sheet pile and application structure and construction method thereof |
| CN114892700A (en) * | 2022-03-23 | 2022-08-12 | 中交(寿光)投资有限公司 | Tidal barrier composite foundation structure for sea-bound weak foundation and construction method of tidal barrier composite foundation structure |
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