CN108425375A - A kind of basis prefabricated post and its connection structure and its construction method - Google Patents
A kind of basis prefabricated post and its connection structure and its construction method Download PDFInfo
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- CN108425375A CN108425375A CN201810381333.1A CN201810381333A CN108425375A CN 108425375 A CN108425375 A CN 108425375A CN 201810381333 A CN201810381333 A CN 201810381333A CN 108425375 A CN108425375 A CN 108425375A
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- 238000010276 construction Methods 0.000 title claims description 22
- 239000004567 concrete Substances 0.000 claims abstract description 71
- 238000009434 installation Methods 0.000 claims abstract description 23
- 238000005266 casting Methods 0.000 claims abstract description 22
- 239000003381 stabilizer Substances 0.000 claims abstract description 21
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 35
- 239000011178 precast concrete Substances 0.000 claims description 29
- 210000003205 muscle Anatomy 0.000 claims description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 230000010412 perfusion Effects 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 4
- 239000003351 stiffener Substances 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 239000011150 reinforced concrete Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 15
- 238000005253 cladding Methods 0.000 abstract description 3
- 230000002262 irrigation Effects 0.000 abstract 2
- 238000003973 irrigation Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 36
- 230000007704 transition Effects 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 241000469816 Varus Species 0.000 description 4
- 239000011083 cement mortar Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 206010016322 Feeling abnormal Diseases 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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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
- E02D27/42—Foundations for poles, masts or chimneys
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Foundations (AREA)
Abstract
The invention discloses a kind of basic prefabricated posts, its drip irrigation device includes cylinder and foundation bolt, the foundation bolt is poured vertically in cylinder, the foundation bolt include bar portion and perpendicular to bar portion and with the integrally formed stabilizer blade of the bar portion, cylinder is partly stretched out in the bar portion and is placed in above cylinder；The invention also discloses a kind of installation methods of basic prefabricated post, and drip irrigation device includes following installation steps：Step a, foundation pit is dug, bottom of foundation ditch pours concrete bed course and arranges bar-mat reinforcement on bed course；Step b, basic prefabricated post is vertically placed in foundation pit；Step c, basic prefabricated post position is adjusted, the bar portion of foundation bolt is made to keep vertical；Step d, bottom of foundation ditch casting concrete makes concrete cladding lower body part point；Step e, foundation pit backfill is carried out after bottom of foundation ditch concrete setting；Achieve the purpose that avoid foundation bolt position in basic casting process deviation occur.
Description
Technical field
The present invention relates to a kind of building foundation, more particularly to a kind of basic prefabricated post and its connection structure and its construction party
Method.
Background technology
Basis is the structure element being transmitted to the various effects that structure is born on ground.When basis top and steel
When structural column connects, the pre-embedded anchoring bolts in basis are needed.During common foundation construction, need first that foundation bolt is solid vertically
It is scheduled in foundation pit, then binds reinforcement foundation, installation form finally carries out concreting.When due to concreting, lower margin
Bolt is easy to shift and tilt under by External force interference, and the position deviation so as to cause the exposed screw rod in top has exceeded
Code requirement causes steel structure column difficult to install, and seriously affects the quality of connection with steel structure column.Even if the later stage is adjusted
It is whole, it is bothersome laborious when being also unable to reach intrinsic requirement for bearing capacity, and adjusting, it can also influence the duration.
Invention content
The object of the present invention is to provide a kind of basic prefabricated posts, can reduce foundation bolt position in basic casting process and go out
Existing deviation.
The present invention above-mentioned technical purpose technical scheme is that：A kind of basis prefabricated post, including
Cylinder and foundation bolt, the foundation bolt are poured vertically in cylinder, and the foundation bolt includes bar portion and perpendicular to bar portion
Stabilizer blade, cylinder is partly stretched out in the bar portion and is placed in above cylinder.
Second object of the present invention is to provide a kind of connection structure of basic prefabricated post, the foundation bolt position of the structure
More accurate, installation quality is high.
The present invention above-mentioned technical purpose technical scheme is that：A kind of basis prefabricated post, including
Cylinder and foundation bolt, the foundation bolt are poured vertically in cylinder, and the foundation bolt includes bar portion and perpendicular to bar portion
Stabilizer blade, cylinder is partly stretched out in the bar portion and is placed in above cylinder, cylinder bottom is embedded in cast-in-place base concrete.
By using above-mentioned technical proposal, foundation bolt is made not shift and tilt in concreting process,
It avoids causing to generate deviation.
Third object of the present invention is to provide a kind of construction methods of foundation structure, and this method installation steps are simple, apply
Work is efficient.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of installation method of basis prefabricated post, including following installation steps：
Step a, foundation pit is dug, bottom of foundation ditch pours concrete bed course；
Step b, basic prefabricated post is vertically placed in foundation pit；
Step c, basic prefabricated post position is adjusted, the bar portion of foundation bolt is made to keep vertical；
Step d, bottom of foundation ditch casting concrete makes concrete cladding lower body part point；
Step e, foundation pit backfill is carried out after bottom of foundation ditch concrete setting.
By using above-mentioned technical proposal, foundation bolt is made not shift and tilt in concreting process,
It avoids causing to generate deviation, and is not required to installation side form, construction is rapidly and efficiently.
In conclusion the present invention has the following technical effects：
1. foundation bolt is poured in advance in basic prefabricated post, when carrying out infrastructure, basic prefabricated post is placed on base vertically
In hole and in bottom of foundation ditch casting concrete, since foundation bolt is fixed in cylinder, can keep away when lower concrete pours
Exempt from that foundation bolt shifts and deviation occurs in inclination, while the construction for carrying out by basic prefabricated post basis is easy to construct, it can
Save the duration；
2. foundation bolt lower part is poured in can meet the needs of foundation bolt stress in cylinder, while can reduce foundation bolt
Dosage, it is cost-effective；Cylinder bottom setting spacer bar can be used as the support of pillar, be convenient for adjusting, while in foundation pit
Casting concrete rear support reinforcing bar can play the role of reinforcement basic stress ability and be adopted simultaneously as foundation bolt cost is higher
Foundation bolt dosage can be saved with such method, it is cost-effective；
3. the foundation structure connect with prefabricated ground beam/precast concrete column it is integral, have better stress, anti-seismic performance；
4. using this method, do not need installation form, construction rapidly and efficiently, save the duration.
Description of the drawings
Fig. 1 is basic prefabricated post structural schematic diagram；
Fig. 2 is basic prefabricated post scheme of installation；
Fig. 3 is basic prefabricated post schematic cross-section；
Fig. 4 is that basic prefabricated post foundation bolt stabilizer blade is located at structural schematic diagram in cylinder；
Fig. 5 is provided with the basic prefabricated post schematic diagram of internal reinforcing bar；
Fig. 6 is the basic prefabricated post schematic diagram that stabilizer blade is located at outside cylinder；
Fig. 7 is provided with the basic prefabricated post scheme of installation of location hole；
Fig. 8 is provided with the basic prefabricated post structural schematic diagram of location hole；
Fig. 9 is the basic prefabricated post structural schematic diagram that location hole is through-hole；
Figure 10 is the structural schematic diagram of first time casting concrete in through-hole；
Figure 11 is second of casting concrete and the structural schematic diagram for wrapping up bolt in through-hole；
Figure 12 is the basic prefabricated post structural schematic diagram of side setting cylinder dowel；
Figure 13 is the basic prefabricated post of side setting cylinder dowel and prefabricated ground beam connection diagram；
Figure 14 is the prefabricated post structural schematic diagram of cylinder dowel setting enlarged footing；
Figure 15 is the cylinder dowel that enlarged footing is arranged and prefabricated ground beam sleeve connection schematic diagram；
Figure 16 is the prefabricated foundation rod structure schematic diagram of side setting jack hole；
Figure 17 is that perforation muscle passes through the structural schematic diagram for connecting both sides ground beam after jack hole；
Figure 18 is the structural schematic diagram that sleeve connection is used after perforating muscle setting enlarged footing；
Figure 19 is that the ground beam dowel of enlarged footing is arranged directly with the structural schematic diagram of sleeve connection；
Figure 20 is that the high prefabricated ground beam in both sides is connected with each other structural schematic diagram；
Figure 21 is that the high prefabricated ground beam in both sides is connected with each other construction procedure one；
Figure 22 is that the high prefabricated ground beam in both sides is connected with each other construction procedure two；
Figure 23 is that the high prefabricated ground beam in both sides is connected with each other construction procedure three；
Figure 24 is that the high prefabricated ground beam in both sides is connected with each other construction procedure four；
Figure 25 is the prefabricated foundation rod structure schematic diagram for becoming enlarged footing after bar portion screw thread nutting；
Figure 26 is that nut enlarged footing connects muscle sleeve connection structure schematic diagram with precast concrete column bottom；
Figure 27 is the prefabricated foundation rod structure schematic diagram of bar portion end setting enlarged footing；
Figure 28 is that enlarged footing connects muscle sleeve connection structure schematic diagram with precast concrete column bottom；
Figure 29 is the prefabricated foundation rod structure schematic diagram that setting is affixed with foundation bottom；
Figure 30 is prefabricated foundation column and precast concrete column sleeve connection structure schematic diagram；
Figure 31 is the structural schematic diagram of installation vertical reinforcement in prefabricated foundation column through-hole；
Figure 32 is prefabricated foundation column and hollowcore precast concrete column attachment structure schematic diagram；
Figure 33 is prefabricated foundation column and hollowcore precast concrete column and prefabricated ground beam attachment structure schematic diagram；
Figure 34 is the structural schematic diagram of closed-entry reinforcing steel bar connecting sleeve tube middle cylinder body；
Figure 35 is the end view of necking；
Figure 36 is the cooperation schematic diagram of sleeve and connection reinforcing bar；
Figure 37 is the connection relationship diagram of closed-entry reinforcing steel bar connecting sleeve tube and prefabricated post；
Figure 38 is the structural schematic diagram of split type cylinder；
Figure 39 is the connection relationship diagram of split type cylinder and prefabricated post；
Figure 40 is the structural schematic diagram that sleeve is connected with two reinforcing bars of vertical state；
Figure 41 is the structural schematic diagram for stretching into fastening piece type sleeve outside；
Figure 42 is to stretch into fastening piece type sleeve and the assembling schematic diagram for connecting reinforcing bar outside.
Reference numeral：1, cylinder；11, cylinder dowel；12, jack hole；13, perforation muscle；14, filling tape is poured after；2,
Foot bolt；21, bar portion；22, stabilizer blade；3, spacer bar；4, location hole；41, stiffener；42, through-hole；5, foundation pit；51, concrete pad
Layer；52, the first pouring area；53, the second pouring area；6, cylinder；61, necking；611, transition circular conical surface；62, injected hole；63, even
Fishplate bar；631, connecting hole；64, barrier element；65, clamping block；651, blocked hole；66, shrapnel；7, H profile steel；71, steel plate；72、
Shear pile；8, prefabricated ground beam；81, ground beam dowel；9, precast concrete column；91, bottom connects muscle；92, hollow；101, sleeve；
102, reinforcing bar is connected；103, enlarged footing.
Specific implementation mode
Below in conjunction with attached drawing, invention is further described in detail.The identical reference numeral of wherein identical parts
It indicates.It should be noted that word "front", "rear" used in the following description, "left", "right", "upper", "lower", " bottom surface " and
" top surface " refers to that the direction in attached drawing, word "inner" and "outside" are referred respectively to towards or away from geometric center of specific component
Direction.
When being built to building foundation, it is necessary first to fix foundation bolt 2 vertically in foundation pit 5, then be propped up
Mould and concrete perfusion basis of formation, in concrete perfusion, foundation bolt 2, which is easily shifted and tilted, leads to foundation bolt 2
Deviation occurs for position, cannot be satisfied building requirements, and the later stage adjusts time-consuming and laborious and easily causes foundation bolt 2 and fix unstable feelings
Condition designs a kind of basic prefabricated post of 2 run-off the straight of avoidable foundation bolt and offset, concrete structure in order to solve the above problem
It is as follows：
Embodiment one：
A kind of basis prefabricated post, as shown in Figure 1, including cylinder 1 and foundation bolt 2, foundation bolt 2 is cast in inside cylinder 1, is wrapped
The bar portion 21 being vertically arranged and the stabilizer blade 22 perpendicular to bar portion 21 are included, bar portion 21 is an integral molding structure with stabilizer blade 22, bar portion 21
Upper end stretches out cylinder 1 and is placed in 1 top of cylinder, and the tip portion of bar portion 21 can be bolt head.The bar portion 21 of foundation bolt 2 to
The lower bottom surface for stretching out cylinder 1, stabilizer blade 22 are located at outside cylinder 1.
As shown in Fig. 2, when installation, pours bed course in 5 bottom of foundation pit and arrange bar-mat reinforcement, then lift basic prefabricated post
To foundation pit 5, after adjusting position and height, stabilizer blade 22 is connected and fixed with bar-mat reinforcement, finally carries out 5 lower concrete of foundation pit and pour
It builds, makes the bottom of the concrete poured cladding cylinder 1, foundation pit 5 is backfilled after concrete setting can complete the construction on basis.
Since foundation bolt 2 is embedded in advance inside cylinder 1, the relative position of bar portion 21 and bolt head when prefabricated
It is fixed, it is bound compared to scene by foundation bolt 2 is single, position precision higher.And after basic prefabricated post installation is fixed,
Stabilized structure, the external force in casting process is difficult to be impacted to its position, so after the completion of entire foundation construction, foundation bolt
2 position offset is well controlled, and precision is high, to improve the construction quality on basis.
In addition, in original base work progress, installation form ability casting concrete is needed, and due to the shape on basis
Structure is that lower part is big, and top is small, so template installation is complicated time-consuming.And this method is used, installation form is not needed, as long as will mix
Solidifying soil pours into 5 bottom of foundation pit, it is made to wrap up the bottom of cylinder 1.Also have in this way construction rapidly and efficiently, work can be saved
The advantages of phase.
As shown in figure 3, the forms such as prism or cylinder, the circumference centered on 1 axis of cylinder of foundation bolt 2 can be used in cylinder 1
Array has multiple.
When the height of foundation of design is larger, the height of cylinder 1 is needed accordingly to increase, but due to 2 material of foundation bolt
High compared to regular reinforcement price, stabilizer blade 22 is located at the waste that the setting outside cylinder 1 can cause material.So as shown in figure 4,
The lower part and stabilizer blade 22 of bar portion 21 may be contained within inside cylinder 1.Preferably, stabilizer blade 22 is arranged for varus.1 lower end of cylinder is fixed
Several spacer bars 3 are provided with, spacer bar 3 is vertically arranged, and the upper end is poured in cylinder 1, and 3 lower end of each spacer bar is protected
It holds and flushes.Spacer bar 3 can be straight muscle, can also be as shown in Figure 4, and the bottom of spacer bar 3 is turned up or varus, with convenient
Support is fixed.
Spacer bar 3 can also be as the inside vertical applied force reinforcing bar of cylinder 1.As shown in figure 5, cylinder 1 is reinforced concrete
Soil structure, inside setting vertical applied force reinforcing bar and stirrup, stirrup it may be said that there are two types of, it is a kind of (to be by vertical applied force reinforcing bar
Spacer bar 3) hoop is enclosed, it is a kind of that foundation bolt 2 is enclosed into hoop.
As shown in fig. 6, when the stabilizer blade 22 of foundation bolt 2 is located at the outside of cylinder 1, foundation bolt 2 can be served as column
The vertical applied force reinforcing bar of body 1 arranges stirrup in the surrounding of foundation bolt 2.
When the stabilizer blade 22 of foundation bolt 2 is located at 1 outside of cylinder, can be turn up or varus setting.Turn up setting when, by
Power structure is more preferable, and the processing and transport of more convenient basic prefabricated post is arranged in varus.
Embodiment two：
Fig. 2 is reviewed, basis top is threadedly coupled with the steel plate 71 for being fixed on 7 bottom of H profile steel to reach to H by foundation bolt 2
7 fixed purpose of shaped steel.Due to foundation bolt 2 in the case where bearing larger shear stress easily there is a situation where fractureing, because
This with 7 fixed steel plate of H profile steel, 71 lower end as shown in fig. 7, be welded with shear pile 72, which sets perpendicular to steel plate 71
It sets.In the prior art, it is corresponding with shear pile 72 to pour out mold to be placed in upper end center position when basis is poured
Location hole 4 stretches into shear pile 72 in location hole 4 when installing H profile steel 7, finally in gap and fixed between steel plate 71 and basis
Casting concrete in the hole 4 of position, to achieve the purpose that bear shear stress.
As shown in Figure 8 and Figure 9, for ease of coordinating with shear pile 72, the 1 upper end center position of cylinder in the present invention is preset with
42 two kinds of forms of counterbore and through-hole can be arranged in location hole 4, the location hole 4, and wherein counterbore can be directly used for carrying out with shear pile 72
Cooperation, through-hole 42 also act as the when of being poured to 5 bottom of foundation pit in addition to it can be coordinated with shear pile 72 and topple over concrete.
As shown in Figure 10, it in through-hole 42 after casting concrete, is connect with base foundation concrete integral, strengthens basis
The connection of prefabricated post and bottom cast-in-place concrete structure enhances the stress performance on basis.It can also be arranged in through-hole 42 vertical
Stiffener 41.In addition it should be pointed out that concrete is divided into two-step pouring in through-hole 42, when pouring for the first time, reserve
The part coordinated with shear pile 72；After the installation of H profile steel 7, then filling tape 14 is poured after being arranged between 1 top of steel plate 71 and cylinder
Carry out secondary pour.
As shown in figure 11, when secondary casting concrete, steel plate 71 and fixing bolt can be wrapped up into concrete, is prevented
It gets rusty.
Embodiment three：
Further include the prefabricated ground beam 8 for being set to 1 side of cylinder, in advance with embodiment one except that as shown in Figure 12 and Figure 13
Ground beam 8 processed connects adjacent two basic prefabricated posts.8 horizontal direction of prefabricated ground beam is embedded with ground beam dowel 81, and ground beam connects
Muscle 81 is connect to connect with basic prefabricated post.Basic post-cast strip is set between the end and cylinder 1 of prefabricated ground beam 8, after concreting,
By prefabricated ground beam 8 with basis connect it is integral.
Binding connection, welding, the connection of straight screw sleeve 101 etc. may be used often with cylinder dowel 11 in ground beam dowel 81
Rule are fixedly connected with mode.
As shown in figure 14,81 end of ground beam dowel of prefabricated ground beam 8 is arranged to enlarged footing 103, as shown in figure 15, cylinder
11 end of dowel is enlarged footing 103, and ground beam dowel 81 is connect with the sleeve 101 of cylinder dowel 11（101 structure of sleeve and
Its connection type is described in last paragraph）.
Example IV：
As shown in figure 16, described to wear with embodiment three except that offer several jack holes 12 in 1 upper portion side wall of cylinder
It is horizontally disposed through-hole or blind hole to connect hole 12.As shown in figure 17, foundation structure further includes the perforation muscle 13 across jack hole 12,
The both ends of perforation muscle 13 are affixed with the ground beam dowel 81 positioned at its both sides respectively.
When prefabricated ground beam 8 is T-shaped setting, the jack hole 12 of one side can be blind hole.
Not only facilitate the transport and installation of basic prefabricated post by the way that jack hole 12 is arranged, but also convenient for the connection of ground beam, together
When also make the connection of ground beam more flexible, facilitate adjustment.
As shown in figure 17,13 both ends of perforation muscle are set as enlarged footing 103, and as shown in figure 18,81 end of ground beam dowel is
Enlarged footing 103, perforation muscle 13 are connect with the sleeve 101 of ground beam dowel 81.
Embodiment five：
With embodiment three except that as shown in figure 19, filling tape 14, phase are poured after being arranged between 1 top of steel plate 71 and cylinder
The ground beam dowel 81 of adjacent two prefabricated ground beams 8 pours after to be connected inside filling tape 14.After pour 14 casting concrete of filling tape after,
Prefabricated ground beam 8 and basis connection is integral.
Further, 81 both ends of ground beam dowel of prefabricated ground beam 8 are set as enlarged footing 103, two neighboring prefabricated ground beam 8
Ground beam dowel 81 with sleeve 101 connect.
The foundation structure need not do any improvement to the side of basic prefabricated post cylinder 1, and equally may be implemented will be prefabricated
Ground beam 8 connect integral with basis.
Embodiment six：
With embodiment five except that as shown in figure 20, the height of prefabricated ground beam 8 is more than the height of cylinder 1,1 bottom of cylinder
Concrete is divided into two-step pouring, and what it is positioned at bottom is the first pouring area 52, and what it is positioned at top is the second pouring area 53；It is two neighboring
The part ground beam dowel 81 of prefabricated ground beam 8 is attached in the second pouring area 53.
Steps are as follows when construction：
As shown in figure 21, first basic prefabricated post is mounted on 5 inner cushion layer of foundation pit, and assembling reinforcement, basic prefabricated post is fixed；
As shown in figure 22,52 concrete of the first pouring area is poured；
As shown in figure 23, after 52 concrete setting of the first pouring area, prefabricated ground beam 8 is mounted on 52 concrete of the first pouring area
Top, and the ground beam dowel 81 that two neighboring prefabricated ground beam 8 is located to 1 upper and lower part of cylinder carries out welding or sleeve 101
Connection；
In conjunction with Figure 24 and Figure 20, the concrete between 53 concrete of the second pouring area and two neighboring prefabricated ground beam 8, coagulation are poured
Native top surface pours to stopping when 72 bottom of shear pile and pours；
Finally, as shown in figure 20, H profile steel 7 is installed, and the concrete for pouring by after filling tape 14 pours.
Embodiment seven：
The difference is that, as shown in figure 25, the part that the bar portion 21 exposes to 1 upper surface of cylinder offers with embodiment one
Screw thread, nut is screwed into after screw thread becomes enlarged footing 103 by 21 end of bar portion.As shown in figure 26, foundation structure further includes prefabricated mixed
Solidifying earth pillar 9,9 bottom of precast concrete column are embedded with the bottom extended downwardly and connect muscle 91, and the lower end that bottom connects muscle 91 is set as expanding
Major part 103；Bottom connects muscle 91 and is connect with the sleeve 101 of enlarged footing 103 of foundation bolt 2；9 bottom surface of precast concrete column and basis
Post-cast strip is arranged between top surface in prefabricated post.
As shown in figure 27, the bar portion 21 of foundation bolt 2 exposes to the end of 1 upper surface of cylinder and is set as enlarged footing 103.Such as
Shown in Figure 28,9 bottom of precast concrete column connects muscle 91 and is connect with the sleeve 101 of enlarged footing 103 of foundation bolt 2.
Embodiment eight：
The difference is that, as shown in figure 29, the stabilizer blade 22 of basic prefabricated post is located inside cylinder 1 with embodiment one, and basis is pre-
Column bottom surface processed is affixed with 5 bottom of foundation pit.The basic prefabricated post being arranged herein has bigger compared to basic prefabricated post above
Sectional dimension, 1 bottom of cylinder is not required in the concrete poured after embedment, but is directly placed in foundation pit 5, its own gravity is utilized
It is used based on advantage.
As shown in figure 30, the top of basic prefabricated post is connect with the sleeve 101 of precast concrete column 9.
Further, in conjunction with Figure 31 and 32, precast concrete column 9 is provided with upper and lower perforative hollow 92；It is filled in hollow 92
Note concrete is simultaneously connect with post-cast strip concrete；Perforative through-hole 42 up and down is arranged in cylinder 1, in through-hole 42 concrete perfusion and with
Post-cast strip concrete connection.
Preferably, the vertical reinforcement that hollow 92 interior settings of through-hole 42 and precast concrete column 9 are elongated, and it is vertical by more
Reinforcing bar is connected with stirrup.To further strengthen the connection between basic prefabricated post and precast concrete column 9.
As shown in figure 33, foundation structure can also include prefabricated ground beam 8, and the ground beam dowel 81 of prefabricated ground beam 8 uses sleeve
101 connections.
Embodiment nine,
A kind of construction method of foundation structure, including following installation steps：
Step a, Fig. 2 is reviewed, foundation pit 5 is dug, 5 bottom of foundation pit pours concrete bed course 51 and arranges bar-mat reinforcement on bed course；
Step b, basic prefabricated post is sling and is vertically placed in foundation pit 5；
Step c, basic prefabricated post position is adjusted, so that the bar portion 21 of foundation bolt 2 is kept vertical, passes through spacer bar 3 or lower margin
Bolt 2 is supported, and interim positioning can be arranged when necessary；
Step d, 5 bottom casting concrete of foundation pit makes concrete coat 1 lower part of cylinder, can be into when foundation pit 5 is in irregular shape
Row formwork pours, and directly can inject concrete by limit hole when limit hole is upper and lower through-hole form is poured；
Step e, the ground beam dowel 81 of prefabricated ground beam 8 is connected with each other, or by the ground beam dowel 81 and cylinder of prefabricated ground beam 8
Dowel 11 connects, or the ground beam dowel 81 of prefabricated ground beam 8 is connect with perforation muscle 13, and pours two neighboring prefabricated ground beam
Post-cast strip between 8；
Step f, foundation pit 5 is carried out after the solidification of 5 lower concrete of foundation pit to backfill.
Embodiment ten,
A kind of construction method of foundation structure, as shown in Figure 29-Figure 33, including following installation steps：
Step a, foundation pit 5 is dug, basic prefabricated post is vertically placed in foundation pit 5；
Step b, vertical reinforcement in the through-hole 42 of basic prefabricated post is installed, stirrup is bound；
Precast concrete column 9 is installed step c, above basic prefabricated post, vertical reinforcement is penetrated in hollow 92；Precast concrete
Column 9 can carry out temporary support with supporting blocks such as I-steel；
Step d, by the sleeve 101 of enlarged footing 103 of enlarged footing 103 and 9 lower part of precast concrete column at the top of basic prefabricated post
Connection；
Step e, the prefabricated ground beam 8 in both sides is installed, the sleeve 101 of ground beam dowel 81 of prefabricated ground beam 8 is connected；
Step f, by the post-cast strip casting concrete between at the top of basic prefabricated post and 9 bottom of precast concrete column.
Tube-in-tube structure and attaching method thereof is introduced：
Sleeve 101 may be used closed-entry reinforced bar sleeve and stretch into fastening piece type sleeve outside.
（Due to the company of the bar portion 21 and prefabricated ground beam 8 of ground beam dowel 11, perforation muscle 13, foundation bolt 2 above
The bottom for connecing reinforcing bar 81 and precast concrete column 9 connects muscle 91 and is both provided with enlarged footing 103, so connection reinforcing bar hereinafter
102, which represent all of above reinforcing bar, illustrates.The component of 101 both sides of sleeve is illustrated by taking prefabricated ground beam 8 as an example）
Closed-entry reinforced bar sleeve：
As shown in figure 34, closed-entry reinforced bar sleeve includes cylinder 6 and is integrally connected to the necking 61 at 6 both ends of cylinder, is opened on cylinder 6
Equipped with several equally distributed injected holes 62, flowed into inside cylinder 6 convenient for cement mortar；In conjunction with Figure 35, necking 61 is round mouth, contracting
Mouthful 61 inner walls are conical surface-shaped, and the larger one end of circular conical surface is towards the inside of cylinder 6；In conjunction with Figure 36, closed-entry reinforced bar sleeve
Connection structure is made of connection reinforcing bar 102 and cylinder 6, and 102 one end of connection reinforcing bar is pre-buried to be fixedly connected on inside prefabricated ground beam 8,
The other end is exposed at 8 outside of prefabricated ground beam and is connected with enlarged footing 103, enlarged footing in one end end far from prefabricated ground beam 8
103 outer wall radial dimension is more than the outer wall radial dimension of connection reinforcing bar 102 and the inner wall radial dimension less than necking 61, expands
First 103 can stretch into from necking 61 inside cylinder 6.
As shown in figure 37, cement mortar is after injected hole 62 flows into the inside of cylinder 6 and solidifies and form concrete, enlarged footing
103 can be fixed on inside cylinder 6, and the connection reinforcing bar 102 that can limit 6 both ends of cylinder is pulled out towards the direction movement being located remotely from each other
Go out cylinder 6, to the prefabricated ground beam 8 to both ends（Rectangular block shape structure of the reinforcing bar 102 far from 6 one end of cylinder is connected in Figure 37 is
The schematic diagram of prefabricated ground beam 8）It is attached, improves the bonding strength between two prefabricated ground beams 8.Enlarged footing 103 is close to connection
One end of reinforcing bar 102 is round platform planar, and enlarged footing 103 is less than the other end close to one end of prefabricated ground beam 8；For ease of narration, contracting
The circular conical surface of mouth 61 is defined as transition circular conical surface 611, and necking 61 and cylinder are integrally connected between 6 end by transition circular conical surface 611
It connects, after connection reinforcing bar 102 is by the active force for extracting cylinder 6 direction, round table surface squeezes concrete, and concrete is by squeezing action
Power（Such as the schematic diagram that the direction of F arrows meaning in Figure 37 is force direction）Pass to transition circular conical surface 611, transition circular conical surface
611 reaction forces generated have component radially to enlarged footing 103, radially compress enlarged footing 103, therefore, transition circle
The conical surface 611 can make the load of cylinder 6 and internal concrete carrying bigger, improve connection reinforcing bar 102 and enlarged footing 103 with
Bonding strength between cylinder 6.
Compared with existing grout sleeve, which does not need individual grouting operation, but in casting concrete, coagulation
Soil paste liquid enters the connection that cylinder 6 completes connection reinforcing bar 102, and operation is more convenient and does not need special grouting material,
It is cost-effective.It transmits further, since the program is depended on pressure, is stung by cohering between grouting material and reinforcing bar compared to grout sleeve
It closes, connection is relatively reliable.
The shape of necking 61 can be round, can also be the various shapes such as rectangular, strip and ellipse, enlarged footing
103 section is adapted with the shape of necking 61.It is effectively transferred to cylinder 6 in order to make the pressure of enlarged footing 103 pass through concrete
On, the size big 1 ~ 5mm, preferably 2 ~ 3mm of the size ratio enlarged footing 103 of necking 61.
As shown in Figure 38 and Figure 39, cylinder 6 has separate structure, can be split as two halves in an axial direction.Two halves cylinder 6 is mutual
Close one end outer surface has been fixedly connected with connecting plate 63, and connecting hole 631, two halves cylinder 6 are offered on connecting plate 63
After being mutually butted split, the connecting hole 631 on connecting plate 63 can be mutually aligned, can by will sell or the pin members such as bolt simultaneously insert
Enter in two connecting holes being mutually aligned 631, pin joints are carried out to two connecting plates 63, limitation two halves cylinder 6 is towards being located remotely from each other
Direction is separated from each other.
When the distance between two prefabricated ground beams 8 are smaller, 102 phase of connection reinforcing bar that is embedded in inside prefabricated ground beam 8
Mutually the distance between close end face of one end is also smaller, can cylinder 6 be split as two halves, first will wherein half cylinder 6
It is nested on one of connection reinforcing bar 102, then the other half cylinder 6 is socketed on connection reinforcing bar 102, finally by two halves cylinder
Body 6 is slided along the axial direction for connecting reinforcing bar 102 and towards direction close to each other, and the connecting hole 631 on connecting plate 63 is made to be mutually aligned,
Being inserted into connecting hole 631 by pin member keeps two halves cylinder 6 stitched together.
As shown in figure 40, when connection be two reinforcing bars of vertical state when, in order to by sleeve 101 before casting concrete
It can be more easily temporarily fixed at the docking location of two connection reinforcing bars 102, be unlikely to slide.So in the middle part of 6 inner wall of cylinder
Position is connected with the barrier element 64 for preventing enlarged footing 103 from running through sleeve 101.Barrier element 64 can be located among cylinder 6
Disk plate.Further, in order to allow cement mortar to be flowed freely in cylinder 6, barrier element 64 is arranged to hollow annulus
Shape, internal radius are less than the diameter of enlarged footing 103.Alternatively, barrier element 64 can also be one be radially arranged piece along cylinder 6
Rod piece.
Stretch into fastening piece type sleeve outside:
As shown in Figure 41 and Figure 42, it includes cylinder 6, clamping block 65, shrapnel 66 to stretch into fastening piece type sleeve outside, and the both ends of cylinder 6 are equal
The blocked hole 651 for 65 grafting of clamping block is offered, injected hole 62 is offered on cylinder 6.The outside of shrapnel 66 one end and cylinder 6
Face is mutually fixedly connected, and one end that the other end and the clamping block 65 of shrapnel 66 are located on the outside of cylinder 6 is mutually fixedly connected.
102 one end of connection reinforcing bar is fixedly connected with enlarged footing 103, and the radial dimension of enlarged footing 103 is more than connection reinforcing bar 102
Radial dimension, enlarged footing 103 can from the port of cylinder 6 be inserted into cylinder 6 inside.In insertion process, enlarged footing 103 pushes clamping
Flexible deformation occurs for band spring plate 66 when block 65 is moved towards the direction far from 6 central axis of cylinder, and clamping is crossed in enlarged footing 103
After block 65, shrapnel 66 gradually restores deformation and is inserted into the reset of cylinder 6, and limitation enlarged footing 103 extracts cylinder 6.
When post-cast strip casting concrete around cylinder 6, cement mortar can be flowed into from the two-port and injected hole 62 of cylinder 6
Inside cylinder 6, solid concrete is formed after cement slurry sets, so that connection reinforcing bar 102 is fixed on inside cylinder 6, to realize
The connection of two connection reinforcing bars 102.
In addition it should be pointed out that 4 sleeve correlations that the applicant submitted on April 8th, 2018 may be used in sleeve
Patent of invention, application number is respectively 201810306670.4,201810307419.X, 201810307420.2 and
201810307967.2。
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this
It is all protected by Patent Law in the right of invention.
Claims (39)
1. a kind of basis prefabricated post, which is characterized in that including cylinder（1）And foundation bolt（2）, the foundation bolt（2）Vertically
It pours in cylinder（1）It is interior, the foundation bolt（2）Including bar portion（21）With perpendicular to bar portion（21）Stabilizer blade（22）, the bar
Portion（21）Cylinder is stretched out in upper part（1）It is placed in cylinder（1）Top.
2. basis prefabricated post according to claim 1, which is characterized in that the foundation bolt（2）Bar portion（21）Downwards
Stretch out cylinder（1）Bottom surface, stabilizer blade（22）Positioned at cylinder（1）It is external.
3. basis prefabricated post according to claim 1, which is characterized in that the foundation bolt（2）Stabilizer blade（22）It is located at
Cylinder（1）Inside, the cylinder（1）Bottom is provided with several vertical spacer bars（3）, the spacer bar（3）It pours upper end
It builds in the cylinder（1）It is internal.
4. basis prefabricated post according to claim 1, which is characterized in that cylinder（1）For reinforced concrete structure, inside is set
It is equipped with reinforcing bar.
5. basis prefabricated post according to claim 1, which is characterized in that the stabilizer blade（22）Towards cylinder（1）Outside
Or inside.
6. basis prefabricated post according to claim 1, which is characterized in that the cylinder（1）Upper end center position offers
Location hole（4）.
7. basis prefabricated post according to claim 6, which is characterized in that the location hole（4）For the counterbore of upper end opening
Structure.
8. basis prefabricated post according to claim 6, which is characterized in that the location hole（4）To run through cylinder（1）It is logical
Pore structure.
9. basis prefabricated post according to claim 8, which is characterized in that be provided with vertical stiffener in through-hole
(41)。
10. basis prefabricated post according to claim 1, which is characterized in that the cylinder（1）Upper side horizontal direction is pre-
It is embedded with cylinder dowel（11）.
11. basis prefabricated post according to claim 10, which is characterized in that the cylinder dowel（11）Exposed end
It is set as enlarged footing（103）.
12. basis prefabricated post according to claim 1, which is characterized in that the cylinder（1）If being offered in upper portion side wall
Dry jack hole（12）, the jack hole（12）For horizontally disposed through-hole or blind hole.
13. basis prefabricated post according to claim 1, which is characterized in that the bar portion（21）Expose to cylinder（1）Upper table
The part in face offers screw thread, and nut is screwed into after screw thread becomes enlarged footing by bar portion end（103）.
14. basis prefabricated post according to claim 1, which is characterized in that the bar portion（21）Expose to cylinder（1）Upper table
The end in face is set as enlarged footing（103）.
15. a kind of foundation structure, which is characterized in that include the basic prefabricated post as described in any one of claim 1-14,
Cylinder（1）Bottom is embedded in cast-in-place base concrete.
16. foundation structure according to claim 15, which is characterized in that cylinder（1）Top is connect with steel column.
17. foundation structure according to claim 16, which is characterized in that steel column bottom surface is equipped with junction steel plate（71）, steel plate
（71）With cylinder（1）Top bolt connects.
18. foundation structure according to claim 17, which is characterized in that steel plate（71）Plane perpendicular is connected with shear pile
（72）, shear pile（72）Stretch into location hole（4）In.
19. foundation structure according to claim 18, which is characterized in that steel plate（71）With cylinder（1）It is arranged between top
After pour filling tape (14).
20. foundation structure according to claim 19, which is characterized in that steel plate（71）And coagulation is poured around fixing bolt
Soil wraps up connecting portion, prevents from getting rusty.
21. foundation structure according to claim 15, which is characterized in that location hole（4）In vertically arranged stiffener
And casting concrete (41),.
22. foundation structure according to claim 15, which is characterized in that further include being set to cylinder（1）Side it is prefabricated
Ground beam (8), prefabricated ground beam (8) connect adjacent two basic prefabricated posts.
23. foundation structure according to claim 22, which is characterized in that prefabricated ground beam（8）Horizontal direction is embedded with ground beam
Dowel（81）, ground beam dowel（81）(81) it is connect with basis prefabricated post.
24. foundation structure according to claim 23, which is characterized in that ground beam dowel（81）It is solid with cylinder dowel
It connects.
25. foundation structure according to claim 24, which is characterized in that cylinder dowel end is enlarged footing（103）, ground
Beam dowel（81）Enlarged footing is arranged in end（103）, ground beam dowel（81）With cylinder dowel sleeve（101）Connection.
26. foundation structure according to claim 23, which is characterized in that further include the perforation muscle across jack hole（13）,
Perforation muscle (13) and ground beam dowel（81）It is affixed.
27. foundation structure according to claim 26, which is characterized in that the perforation muscle（13）Both ends are set as enlarged footing
（103）, ground beam dowel（81）End is enlarged footing（103）, muscle of perforating（13）With ground beam dowel（81）Use sleeve（101）Even
It connects.
28. foundation structure according to claim 27, which is characterized in that further include precast concrete column (9), concrete
Earth pillar bottom surface setting bottom connects muscle (91), and end is enlarged footing（103）, the enlarged footing of precast concrete column（103）With cylinder（1）
The enlarged footing at top（103）Use sleeve（101）Connection.
29. foundation structure according to claim 23, which is characterized in that poured after being arranged between 1 top of steel plate 71 and cylinder
Filling tape（14）, two neighboring prefabricated ground beam（8）Ground beam dowel（81）Filling tape is poured after（14）Inside connection.
30. foundation structure according to claim 29, which is characterized in that prefabricated ground beam（8）Ground beam dowel（81）Two
End is set as enlarged footing（103）, two neighboring prefabricated ground beam（8）Ground beam dowel（81）Use sleeve（101）Connection.
31. foundation structure according to claim 23, which is characterized in that prefabricated ground beam（8）Height be more than cylinder（1）'s
Highly, cylinder（1）Lower concrete is divided into two-step pouring, and what it is positioned at bottom is the first pouring area (52), and what it is positioned at top is
Two pouring areas (53)；Two neighboring prefabricated ground beam（8）Part ground beam dowel（81）Connected in the second pouring area (63)
It connects.
32. a kind of foundation structure, which is characterized in that include the basic prefabricated post as described in any one of claim 13-14,
It further include precast concrete column（9）, precast concrete column（9）Bottom is embedded with the bottom extended downwardly and connects muscle（91）, bottom connects
Muscle（91）Lower end be set as enlarged footing（103）；Bottom connects muscle（91）With foundation bolt（2）Enlarged footing（103）Use sleeve
（101）Connection；Precast concrete column（9）Post-cast strip is set between bottom surface and basic prefabricated post top surface.
33. a kind of foundation structure, which is characterized in that include the basic prefabricated post as described in any one of claim 13-14,
It is characterized in that, stabilizer blade（22）Positioned at cylinder（1）Inside, basic prefabricated post bottom surface are affixed with bottom of foundation ditch.
34. foundation structure according to claim 33, which is characterized in that precast concrete column（9）It is provided with and runs through up and down
Hollow (92)；Hollow (92) interior concrete perfusion is simultaneously connect with post-cast strip concrete.
35. foundation structure according to claim 34, which is characterized in that cylinder（1）Perforative through-hole (42) above and below setting,
The interior concrete perfusion of through-hole (42) is simultaneously connect with post-cast strip concrete.
36. foundation structure according to claim 35, which is characterized in that cylinder（1）Through-hole (42) and precast concrete
Column（9）Hollow (92) in the elongated vertical reinforcement of setting.
37. a kind of construction method of foundation structure, it is characterised in that：Including following installation steps：
Step a, foundation pit is dug（5）, foundation pit（5）Bottom pours concrete bed course（51）；
Step b, basic prefabricated post is vertically placed on foundation pit（5）It is interior；
Step c, it adjusts basic prefabricated post position and reinforces, make foundation bolt（2）Bar portion（21）Keep vertical；
Step d, foundation pit（5）Bottom casting concrete makes concrete coat cylinder（1）Lower part；
Step e, foundation pit（5）Foundation pit is carried out after lower concrete solidification（5）Backfill.
38. according to a kind of construction method of foundation structure described in claim 37, which is characterized in that further include step d-1, incite somebody to action
Prefabricated ground beam（8）Ground beam dowel（81）It is connected with each other, or by prefabricated ground beam（8）Ground beam dowel（81）With prefabricated ground beam
（8）The connection of cylinder dowel, or by prefabricated ground beam（8）Ground beam dowel（81）With perforation muscle（13）Connection, and pour phase
Adjacent two prefabricated ground beams（8）Between post-cast strip.
39. a kind of construction method of foundation structure, it is characterised in that：Including following installation steps：
Step a, foundation pit is dug（5）, basic prefabricated post is vertically placed on foundation pit（5）It is interior；
Step b, precast concrete column is installed above basic prefabricated post（9）；
Step c, by the enlarged footing at the top of basic prefabricated post（103）With precast concrete column（9）The enlarged footing of lower part（103）With set
Cylinder（101）Connection；
Step d, by basic prefabricated post top and precast concrete column（9）Post-cast strip casting concrete between bottom.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810381333.1A CN108425375A (en) | 2018-04-25 | 2018-04-25 | A kind of basis prefabricated post and its connection structure and its construction method |
| PCT/CN2019/084136 WO2019206192A1 (en) | 2018-04-25 | 2019-04-24 | Prefabricated column/beam and connection structure thereof and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810381333.1A CN108425375A (en) | 2018-04-25 | 2018-04-25 | A kind of basis prefabricated post and its connection structure and its construction method |
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| Publication Number | Publication Date |
|---|---|
| CN108425375A true CN108425375A (en) | 2018-08-21 |
Family
ID=63161765
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|---|---|---|---|
| CN201810381333.1A Pending CN108425375A (en) | 2018-04-25 | 2018-04-25 | A kind of basis prefabricated post and its connection structure and its construction method |
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| CN (1) | CN108425375A (en) |
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| CN110258602A (en) * | 2019-06-27 | 2019-09-20 | 中铁第四勘察设计院集团有限公司 | Prefabricated water-blocking bank segment, the construction method from wall discharge structure and from wall ditch |
| WO2019206192A1 (en) * | 2018-04-25 | 2019-10-31 | Li Cangzhu | Prefabricated column/beam and connection structure thereof and construction method thereof |
| CN110820952A (en) * | 2019-10-17 | 2020-02-21 | 九州职业技术学院 | Steel structure column installation rapid positioning device and construction method |
| CN110965572A (en) * | 2019-12-31 | 2020-04-07 | 中国电建集团贵州电力设计研究院有限公司 | Street lamp foundation prefabricated structure and construction method |
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| US11293183B2 (en) * | 2017-06-02 | 2022-04-05 | China State Construction Engineering Corporation Limited | Precast column base joint and construction method therefor |
| WO2019206192A1 (en) * | 2018-04-25 | 2019-10-31 | Li Cangzhu | Prefabricated column/beam and connection structure thereof and construction method thereof |
| CN110258602A (en) * | 2019-06-27 | 2019-09-20 | 中铁第四勘察设计院集团有限公司 | Prefabricated water-blocking bank segment, the construction method from wall discharge structure and from wall ditch |
| CN110820952A (en) * | 2019-10-17 | 2020-02-21 | 九州职业技术学院 | Steel structure column installation rapid positioning device and construction method |
| CN110965572A (en) * | 2019-12-31 | 2020-04-07 | 中国电建集团贵州电力设计研究院有限公司 | Street lamp foundation prefabricated structure and construction method |
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