CN111851564A - Spliced bearing platform plate structure connected with pile foundation and construction method - Google Patents
Spliced bearing platform plate structure connected with pile foundation and construction method Download PDFInfo
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- CN111851564A CN111851564A CN202010606908.2A CN202010606908A CN111851564A CN 111851564 A CN111851564 A CN 111851564A CN 202010606908 A CN202010606908 A CN 202010606908A CN 111851564 A CN111851564 A CN 111851564A
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- 238000010276 construction Methods 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 90
- 239000010959 steel Substances 0.000 claims abstract description 90
- 239000000463 material Substances 0.000 claims abstract description 20
- 210000002435 tendon Anatomy 0.000 claims description 15
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 13
- 230000007704 transition Effects 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 description 15
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- Mining & Mineral Resources (AREA)
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- Piles And Underground Anchors (AREA)
Abstract
The invention provides an assembled bearing platform plate structure connected with a pile foundation and a construction method, and relates to the technical field of bridge construction. The spliced bearing plate structure comprises a bearing plate and a pile foundation, wherein the bearing plate comprises a first bearing plate precast block and a second bearing plate precast block, and a first bearing plate connecting key and a second bearing plate connecting key are respectively arranged on the first bearing plate precast block and the second bearing plate precast block; splicing the first bearing plate precast block and the second bearing plate precast block by pouring joint pouring materials; the pile foundation is characterized in that the pile foundation positions corresponding to the first bearing plate precast block and the second bearing plate precast block are provided with preformed holes, the top of the pile foundation is provided with vertical steel bars and a connecting plate, the top of the pile foundation is paved with splicing joints, the bearing plate is hoisted, the vertical steel bars and the connecting plate of the pile foundation are inserted into the corresponding preformed holes, concrete is poured after pouring, and the bearing plate is connected with the pile foundation. The bearing plate is fast in assembling speed, high in construction efficiency, reliable in connection and stress with the pile foundation, capable of solving the connection problem between the prefabricated bearing plates and the pile foundation and capable of realizing the prefabricated assembling of the bearing plate.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to an assembled bearing platform plate structure connected with a pile foundation and a construction method.
Background
The fabricated building has the advantages of small construction interference, high construction speed, high construction quality and the like, and is increasingly applied to bridge structures; in various structures of bridges, the application of assembled beam parts and prefabricated pipe piles is more, in recent years, the prefabricated assembled bridge piers begin to be popularized and applied in different projects, compared with the structures, the bearing platform plate is almost constructed by a cast-in-place method, and the development of the prefabricated assembling technology is lagged; compared with a cast-in-place bearing platform, the prefabricated assembled bearing platform plate is prefabricated in a partitioning mode, is transported to the site and is connected quickly, large quantities of steel bars are prevented from being bound on the site and concrete pouring is avoided, construction speed is high, the prefabricated assembled bearing platform plate can be used together with a prefabricated pipe pile and an assembled pier, and the assembly rate of the whole bridge can be improved.
The bearing platform plate structure needs to be connected with a lower pile foundation, the size is often large, the bearing platform plate structure needs to be prefabricated in blocks when the prefabricated assembly is adopted, the bearing platform plate structure is assembled again, the reliability of the connecting part directly influences the safety of the whole structure, the bearing platform plate structure is a key part of the structure, and key research is needed. Therefore, it is an urgent need to solve the problem of developing an assembled bearing platform structure connected with a pile foundation and a construction method thereof.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide an assembled bearing platform plate structure connected with a pile foundation and a construction method, so that the assembling speed between prefabricated blocks of the bearing platform plate is high, the construction efficiency is high, the connection and stress between the prefabricated bearing platform plate and a pile foundation are reliable, the connection problem between the prefabricated bearing platform plate and the pile foundation is solved, and the prefabricated assembling of the bearing platform plate is realized.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an assembled bearing plate structure connected with a pile foundation, which comprises a bearing plate and a pile foundation, wherein the bearing plate comprises a first bearing plate precast block and a second bearing plate precast block; the bearing plate precast block I and the bearing plate precast block II are spliced by pouring materials through pouring joints; the pile foundation structure is characterized in that preformed holes are formed in the positions, corresponding to the pile foundation, of the first bearing plate precast block and the second bearing plate precast block, vertical reinforcing steel bars and connecting plates are arranged at the top of the pile foundation, splicing joints are laid at the top of the pile foundation, the bearing plates are hoisted, the vertical reinforcing steel bars and the connecting plates of the pile foundation are inserted into the corresponding preformed holes, after-pouring concrete is poured, and connection of the bearing plates and the pile foundation is completed.
On the basis of the scheme, a first bearing plate connecting key is arranged above the splicing position of the first bearing plate precast block, a second bearing plate connecting key is arranged below the splicing position of the second bearing plate precast block, the part of the first bearing plate connecting key, extending out of the first bearing plate precast block, is mutually lapped with the part of the second bearing plate connecting key, extending out of the second bearing plate precast block, and the lapping part is connected through high-strength mortar.
On the basis of any scheme, furthermore, a first connecting steel bar extends out of the first bearing plate precast block and the first end face of the bearing plate connecting key, a second connecting steel bar extends out of the second bearing plate precast block and the second end face of the bearing plate connecting key, the first connecting steel bar and the second connecting steel bar are arranged in a staggered mode and are in lap joint with each other, and reinforcing stirrups are bound between the first connecting steel bar and the second connecting steel bar.
On the basis of any scheme, further, joint grouting materials are arranged between the first bearing plate precast block and the second bearing plate connecting key and between the second bearing plate precast block and the first bearing plate connecting key and are used for connecting the first connecting reinforcing steel bars and the second connecting reinforcing steel bars.
On the basis of any scheme, a prestressed tendon and a corrugated pipe are further embedded in the bearing plate connecting key I, the corrugated pipe is embedded in the corresponding position of the bearing plate connecting key II, when the bearing plate connecting key I and the bearing plate connecting key are assembled, the prestressed tendon in the bearing plate connecting key I penetrates into the corrugated pipe in the bearing plate connecting key II, and then the prestressed tendon is tensioned to connect.
On the basis of any scheme, further, the preformed hole is formed in the first bearing plate precast block and the second bearing plate precast block, the preformed hole is in a variable-diameter cylinder shape, the aperture of the upper portion of the preformed hole is gradually increased, the middle portion of the preformed hole is provided with a shear key, the shear key is in one or more concave-convex shapes, and the opening of the lower portion of the shear key is smaller than that of the transition section of the pile foundation.
The embedded steel bars are arranged around the preformed hole at the top of the bearing plate and extend into the preformed hole; in addition, set up vertical reinforcement in the pile foundation, vertical reinforcement stretches out the pile foundation top surface, sets up the hoop reinforcement on the vertical reinforcement.
On the basis of any one of the above schemes, further, the pile foundation is in one-to-one correspondence with the preformed hole, a transition section is arranged above the pile foundation, the diameter of the transition section is larger than the size of other positions of the pile foundation, and the diameter of the preformed hole at the joint is larger.
On the basis of any scheme, a connecting plate is further arranged in the pile foundation, extends out of the top surface of the pile foundation and is positioned on the inner side of the vertical steel bar;
the connecting plate is a straight or cross steel plate, a stud is arranged on the connecting plate, one side of the connecting plate is anchored in the pile foundation through the stud, and the other side of the connecting plate is connected with post-cast concrete through the stud;
the connecting plate top is provided with the reinforcing bar trompil, shear steel and embedded steel bar one-to-one, shear steel pass behind the reinforcing bar trompil with embedded steel bar connects.
On the basis of any one of the above schemes, further, the bearing plate comprises one or more bearing plate precast blocks;
when the bearing plate comprises a precast block, only the preformed hole is arranged on the precast block to be connected with the pile foundation;
when the bearing platform plate comprises a plurality of prefabricated blocks, the prefabricated blocks are assembled through connecting keys, connecting reinforcing steel bars and joint grouting materials in the same mode.
The invention provides a construction method of an assembled bearing platform plate structure connected with a pile foundation, which comprises the following steps:
Step one, pile foundation construction, namely prefabricating a bearing plate precast block I and a bearing plate precast block II;
secondly, laying splicing seams on the top surface of the pile foundation, hoisting a first pile cap plate precast block, penetrating vertical steel bars and connecting plates on the corresponding pile foundation into the reserved holes, and laying setting slurry on the first pile cap plate connecting keys;
step three, hoisting the bearing plate precast block II, and penetrating vertical steel bars and connecting plates on the corresponding pile foundations into the reserved holes; the corrugated pipe penetrates into the corresponding prestressed beam, and the bearing plate connecting key II is connected with the bearing plate connecting key I through the slurry; the first connecting steel bar and the second connecting steel bar are mutually lapped, and reinforcing stirrups are bound;
fourthly, penetrating the shear steel bars through the steel bar openings on the connecting plates and connecting the shear steel bars with the embedded steel bars; tensioning a prestressed tendon, grouting into the corrugated pipe, and constructing anchor sealing concrete;
and fifthly, pouring concrete into the reserved hole after pouring, pouring materials into the pouring joint, and finishing construction after maintenance.
The invention has the beneficial effects that:
the invention provides an assembled bearing platform plate structure connected with a pile foundation and a construction method, which can obtain the following effects:
1. the bearing plate is prefabricated in sections and transported to the site for assembly, so that a large amount of reinforcement and concrete pouring construction on the site is avoided, the assembly rate of the bearing plate is improved, and the construction period is shortened.
2. The bearing plate precast blocks are anchored and force-transmitting by joint filling materials, connecting keys are arranged to ensure shearing resistance between the bearing plate precast blocks, integrity is increased by tensioning prestress between the connecting keys, and the splicing scheme between the bearing plate precast blocks is reliable in connection, large in construction tolerance and rapid in splicing.
3. The bearing plate is provided with a preformed hole, and the preformed hole is provided with shear keys through diameter change, so that the anchoring between the post-cast concrete and the bearing plate precast block is enhanced.
4. The vertical force transmission mode between the pile foundation setting transition section and the pile cap plate is clear and definite, through pre-buried vertical steel bars and connecting plates, and set up the peg and the shear steel bar on the connecting plate, the reliability of being connected between pile foundation and post-cast concrete, pile cap plate prefabricated section has been showing and has been strengthened.
5. The connection structures between the prefabricated blocks of the bearing plate and between the bearing plate and the pile foundation are safe and reliable, the on-site assembly is rapid and convenient, and the problem of large-size bearing plate prefabrication, assembly and construction is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic elevation structure view of an assembled bearing platform plate structure connected with a pile foundation according to an embodiment of the present invention;
fig. 2 is a schematic plan structural view of an assembled bearing platform plate structure connected with a pile foundation according to an embodiment of the present invention;
fig. 3 is a schematic view of a bearing plate precast block of an assembled bearing plate structure connected with a pile foundation according to an embodiment of the present invention;
fig. 4 is a schematic view of a bearing plate precast block ii of an assembled bearing plate structure connected with a pile foundation according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a pile foundation provided by an embodiment of the invention;
fig. 6 is a schematic view of a connecting reinforcement of an assembled bearing platform structure connected to a pile foundation according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating a tendon according to an embodiment of the present invention.
Icon:
1-pile foundation;
11-a transition section;
2-splicing seams;
31-a first bearing plate precast block;
32-a bearing plate precast block II;
41-bearing plate connecting key I;
42-bearing plate connecting key II;
5-preparing a hole;
51-shear key;
52-post-pouring concrete;
6-pouring materials for joints;
61-connecting the first reinforcing steel bar;
62-connecting a second steel bar;
63-reinforcing the stirrup;
7-vertical steel bars;
71-hoop reinforcement;
8-connecting plates;
81-studs;
82-drilling holes on the steel bars;
83-shear reinforcement;
84-embedding reinforcing steel bars;
9-prestressed tendons;
91-a bellows;
92-sealing the anchor;
10-sitting in the slurry.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
As shown in fig. 1 to 7, the present invention is described with reference to the accompanying drawings for providing a structural schematic diagram of an assembled platform structure connected to a pile foundation 1 according to an embodiment of the present invention.
The spliced bearing platform plate structure connected with the pile foundation 1, provided by the embodiment of the invention, comprises a bearing platform plate and the pile foundation 1, wherein the bearing platform plate comprises a first bearing platform plate precast block 31 and a second bearing platform plate precast block 32, the first bearing platform plate precast block 31 is provided with a first bearing platform plate connecting key 41, and the second bearing platform plate precast block 32 is provided with a second bearing platform plate connecting key 42; splicing the first bearing plate precast block 31 and the second bearing plate precast block 32 through pouring joint pouring materials 6; corresponding pile foundation 1 position on bearing platform board prefabricated section 31 and the two 32 bearing platform board prefabricated sections is equipped with preformed hole 5, and 1 top of pile foundation is provided with vertical reinforcement 7 and connecting plate 8, lays splice joint 2 at 1 top of pile foundation, hoists the bearing platform board, inserts the vertical reinforcement 7 and the connecting plate 8 of pile foundation 1 in the preformed hole 5 that corresponds, pours back cast concrete 52 again, accomplishes being connected of bearing platform board and pile foundation 1.
Further, a first bearing plate connecting key 41 is arranged above the splicing position of the first bearing plate precast block 31, a second bearing plate connecting key 42 is arranged below the splicing position of the second bearing plate precast block 32, the part, extending out of the first bearing plate precast block 31, of the first bearing plate connecting key 41 is in lap joint with the part, extending out of the second bearing plate precast block 32, of the second bearing plate connecting key 42, the lap joint is connected through high-strength mortar setting slurry 10, and the first bearing plate connecting key 41 and the second bearing plate connecting key 42 are stressed through the mutual lap joint parts, so that shear force transmission between the first bearing plate connecting key 41 and the second bearing plate connecting key 42 is guaranteed, connecting reinforcing steel bars on the first bearing plate precast block 31 and the second bearing plate precast block 32 are staggered, stress is dispersed, and splicing reliability is improved.
Furthermore, the first connecting steel bar 61 extends out of the end faces of the first bearing plate precast block 31 and the first bearing plate connecting key 41, the second connecting steel bar 62 extends out of the end faces of the second bearing plate precast block 32 and the second bearing plate connecting key 42, the first connecting steel bar 61 and the second connecting steel bar 62 are arranged in a staggered mode, the first connecting steel bar 61 and the second connecting steel bar 62 are in lap joint with each other, the reinforcing stirrups 63 are bound between the first connecting steel bar 61 and the second connecting steel bar 62, the steel bars are convenient to penetrate into each other when the bearing plates are assembled, and force transmission between the first connecting steel bar 61 and the second connecting steel bar 62.
Furthermore, a joint grouting material 6 is arranged between the first bearing plate precast block 31 and the second bearing plate connecting key 42 and between the second bearing plate precast block 32 and the first bearing plate connecting key 41, the joint grouting material 6 connects the first connecting steel bar 61 and the second connecting steel bar 62, and the first connecting steel bar 61 and the second connecting steel bar 62 are connected with each other through the bond strength of the joint grouting material 6.
Furthermore, the prestressed tendons 9 and the corrugated pipes 91 are pre-embedded in the first bearing plate connecting key 41, the corrugated pipes 91 are pre-embedded in the corresponding positions of the second bearing plate connecting key 42, when the first bearing plate connecting key 41 and the second bearing plate connecting key 42 are assembled, the prestressed tendons 9 in the first bearing plate connecting key 41 penetrate into the corrugated pipes 91 in the second bearing plate connecting key 42, then the prestressed stress is tensioned for connection, the grouting material is pressed, the concrete is sealed, the connection between the first bearing plate connecting key 41 and the second bearing plate connecting key 42 is enhanced through the connection of the prestressed tendons 9, mutual occlusion between the first bearing plate connecting key 41 and the second bearing plate connecting key 42 is guaranteed through the prestress, mutual dislocation or slippage between the first bearing plate connecting key 41 and the second bearing plate connecting key is avoided, and therefore connection between the.
Furthermore, preformed hole 5 sets up in first 31 of bearing platform prefabricated section and second 32 of bearing platform prefabricated section, and preformed hole 5 adopts variable diameter cylindricly, and the top aperture increases gradually, and the mid portion is provided with shear force key 51, and shear force key 51 is one or more concave-convex type, and the below opening is littleer than pile foundation 1 transition segment 11. The diameter-variable upper part enhances the bonding force between the post-cast concrete 52 and the bearing plate, prevents the post-cast concrete 52 from being pulled out of the preformed hole 5, and simultaneously can ensure the extension length of the embedded steel bars 84 and ensure the connection operation space of the embedded steel bars 84 and the shear steel bars 83; the shear key 51 ensures the vertical shear-resisting action between the post-cast concrete 52 and the pile cap plate, and when the pile cap plate bears the pressure of the pile foundation 1, the transmission of the pressure is ensured through the action of the shear key 51.
It should be noted that the embedded steel bars 84 are arranged around the preformed hole 5 at the top of the bearing plate and extend into the preformed hole 5; in addition, set up vertical reinforcement 7 in the pile foundation 1, vertical reinforcement 7 stretches out pile foundation 1 top surface, sets up hoop reinforcement 71 on the vertical reinforcement 7.
Further, pile foundation 1 and preformed hole 5 one-to-one, pile foundation 1 top is provided with changeover portion 11, and the diameter of changeover portion 11 is big than the size of pile foundation 1 other positions, and is big than the preformed hole 5 diameter of department of being connected, when the bearing platform board is assembled with pile foundation 1, lays 2 high strength thick liquids of concatenation seam, and the bearing platform board is used in changeover portion 11 top, through 11 transmission vertical forces of changeover portion.
Further, a connecting plate 8 is arranged in the pile foundation 1, and the connecting plate 8 extends out of the top surface of the pile foundation 1 and is positioned on the inner side of the vertical steel bar 7; the connecting plate 8 is a straight or cross steel plate, the connecting plate 8 is provided with a stud 81, one side of the connecting plate 8 is anchored in the pile foundation 1 through the stud 81, and the other side of the connecting plate 8 is connected with the post-cast concrete 52 through the stud 81; the steel bar opening 82 is formed above the connecting plate 8, the shear steel bars 83 correspond to the embedded steel bars 84 one by one, the shear steel bars 83 penetrate through the steel bar opening 82 and then are connected with the embedded steel bars 84, the connecting plate 8, the shear steel bars 83 and the post-cast concrete 52 jointly form a perforated plate shear key (PBL) type connection, and the connecting strength is obviously improved. When the pile foundation 1 is subjected to tension, the pile foundation 1 is anchored in the post-cast concrete 52 of the preformed hole 5 through the vertical steel bars 7 and the connecting plates 8, and the connecting plates 8 act together through the studs 81 and the shear steel bars 83, so that the connection strength between the pile foundation 1 and the bearing plate is improved.
Further, the bearing plate comprises one or more bearing plate precast blocks; when the bearing platform plate comprises a precast block, only the preformed hole 5 is arranged on the precast block and connected with the pile foundation 1; when the bearing platform plate comprises a plurality of prefabricated blocks, the prefabricated blocks are assembled through connecting keys, connecting reinforcing steel bars and joint grouting materials 6 in the same mode.
The construction method of the assembled bearing platform plate structure connected with the pile foundation 1 provided by the embodiment of the invention comprises the following steps:
step one, pile foundation 1 construction, namely prefabricating a first bearing plate precast block 31 and a second bearing plate precast block 32;
secondly, laying a splicing seam 2 on the top surface of the pile foundation 1, hoisting a first bearing plate precast block 31, penetrating a vertical steel bar 7 and a connecting plate 8 on the corresponding pile foundation 1 into a reserved hole 5, and laying a setting slurry 10 on a first bearing plate connecting key 41;
step three, hoisting a second bearing plate precast block 32, and penetrating the vertical steel bars 7 and the connecting plates 8 on the corresponding pile foundation 1 into the preformed holes 5; the corrugated pipe 91 penetrates into the corresponding prestressed tendon 9, and the bearing plate connecting key II 42 is connected with the bearing plate connecting key I41 through the setting slurry 10; the first connecting steel bar 61 and the second connecting steel bar 62 are mutually lapped, and a reinforcing stirrup 63 is bound;
Fourthly, enabling the shear steel bars 83 to penetrate through the steel bar openings 82 in the connecting plate 8 and be connected with the embedded steel bars 84; tensioning the prestressed tendons 9, grouting into the corrugated pipe 91, and constructing concrete for sealing the anchor 92;
and fifthly, pouring post-cast concrete 52 into the preformed hole 5, pouring the joint pouring material 6, and finishing construction after maintenance.
The assembled bearing platform plate structure connected with the pile foundation 1 and the construction method provided by the embodiment of the invention can respectively obtain the following effects: the bearing plate is prefabricated in sections and transported to the site for assembly, so that a large amount of reinforcement and concrete pouring construction on the site is avoided, the assembly rate of the bearing plate is improved, and the construction period is shortened; the bearing plate precast blocks are anchored and force-transmitting by connecting reinforcing steel bars through joint grouting materials 6, connecting keys are arranged to ensure shearing resistance among the bearing plate precast blocks, integrity is increased among the connecting keys through tensioning prestress, and the bearing plate precast blocks are reliably connected in an assembling scheme, large in construction tolerance and quick to assemble; the bearing plate is provided with a preformed hole 5, and the preformed hole 5 enhances the anchoring between the post-cast concrete 52 and the bearing plate precast block by changing the diameter and arranging a shear key 51; the vertical force transmission mode between the transition section 11 and the bearing platform plate of the pile foundation 1 is clear, the vertical steel bars 7 and the connecting plates 8 are pre-embedded, and the studs 81 and the shear steel bars 83 are arranged on the connecting plates 8, so that the connection reliability between the pile foundation 1 and the post-cast concrete 52 and between the bearing platform plate precast blocks is obviously enhanced; the connection structures between the prefabricated blocks of the bearing plate and between the bearing plate and the pile foundation 1 are safe and reliable, the on-site assembly is rapid and convenient, and the problem of large-volume bearing plate prefabrication, assembly and construction is solved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a pin-connected panel cushion cap structure with pile foundation is continuous, includes cushion cap board and pile foundation, its characterized in that: the bearing plate comprises a first bearing plate precast block and a second bearing plate precast block, wherein a first bearing plate connecting key is arranged on the first bearing plate precast block, and a second bearing plate connecting key is arranged on the second bearing plate precast block; the bearing plate precast block I and the bearing plate precast block II are spliced by pouring materials through pouring joints; the pile foundation structure is characterized in that preformed holes are formed in the positions, corresponding to the pile foundation, of the first bearing plate precast block and the second bearing plate precast block, vertical reinforcing steel bars and connecting plates are arranged at the top of the pile foundation, splicing joints are laid at the top of the pile foundation, the bearing plates are hoisted, the vertical reinforcing steel bars and the connecting plates of the pile foundation are inserted into the corresponding preformed holes, after-pouring concrete is poured, and connection of the bearing plates and the pile foundation is completed.
2. The assembled bearing platform plate structure connected with the pile foundation as claimed in claim 1, wherein the first bearing platform plate precast block is provided with a first bearing platform plate connecting key above the splicing position, the second bearing platform plate precast block is provided with a second bearing platform plate connecting key below the splicing position, the part of the first bearing platform plate connecting key extending out of the first bearing platform plate precast block and the part of the second bearing platform plate connecting key extending out of the second bearing platform plate precast block are mutually overlapped, and the overlapping part is connected through high-strength mortar setting slurry.
3. The assembled bearing platform plate structure connected with the pile foundation of claim 1, wherein the first bearing platform plate precast block and the first bearing platform plate connecting key extend out of a first connecting steel bar, the second bearing platform plate precast block and the second bearing platform plate connecting key extend out of a second connecting steel bar, the first connecting steel bar and the second connecting steel bar are arranged in a staggered mode and are in lap joint with each other, and reinforcing stirrups are bound between the first connecting steel bar and the second connecting steel bar.
4. The assembled bearing platform plate structure connected with the pile foundation as claimed in claim 3, wherein joint grouting materials are arranged between the first bearing platform plate precast block I and the second bearing platform plate connecting key and between the second bearing platform plate precast block II and the first bearing platform plate connecting key, and the joint grouting materials are used for connecting the first connecting steel bars and the second connecting steel bars.
5. The assembled bearing platform plate structure connected with the pile foundation of claim 3, wherein the prestressed tendons and the corrugated pipes are embedded in the first bearing platform plate connecting key, the corrugated pipes are embedded in the corresponding positions of the second bearing platform plate connecting key, and the prestressed tendons in the first bearing platform plate connecting key penetrate into the corrugated pipes in the second bearing platform plate connecting key when the two bearing platform plate structures are assembled, and then the prestressed tendons are tensioned to connect the two bearing platform plate structures.
6. The assembled bearing platform plate structure connected with the pile foundation as claimed in claim 1, wherein the prepared holes are arranged in the first bearing platform precast block and the second bearing platform precast block, the prepared holes are cylindrical with variable diameters, the upper hole diameter is gradually increased, the middle part is provided with a shear key, the shear key is one or more concave-convex shapes, and the lower opening is smaller than the transition section of the pile foundation.
7. The assembled bearing platform plate structure connected with the pile foundation as claimed in claim 1, wherein the pile foundation is in one-to-one correspondence with the prepared holes, a transition section is arranged above the pile foundation, the diameter of the transition section is larger than the diameter of other positions of the pile foundation, and the diameter of the transition section is larger than the diameter of the prepared holes at the connection positions.
8. The assembled bearing platform plate structure connected with the pile foundation of claim 1, wherein a connecting plate is arranged in the pile foundation, extends out of the top surface of the pile foundation and is positioned inside the vertical steel bars;
The connecting plate is a straight or cross steel plate, a stud is arranged on the connecting plate, one side of the connecting plate is anchored in the pile foundation through the stud, and the other side of the connecting plate is connected with post-cast concrete through the stud;
the connecting plate top is provided with the reinforcing bar trompil, shear steel and embedded steel bar one-to-one, shear steel pass behind the reinforcing bar trompil with embedded steel bar connects.
9. A fabricated deck structure according to claim 6, wherein the deck comprises one or more deck precast blocks;
when the bearing plate comprises a precast block, only the preformed hole is arranged on the precast block to be connected with the pile foundation;
when the bearing platform plate comprises a plurality of prefabricated blocks, the prefabricated blocks are assembled through connecting keys, connecting reinforcing steel bars and joint grouting materials in the same mode.
10. A construction method of an assembled bearing platform plate structure connected with a pile foundation is characterized by comprising the following steps:
step one, pile foundation construction, namely prefabricating a bearing plate precast block I and a bearing plate precast block II;
secondly, laying splicing seams on the top surface of the pile foundation, hoisting a first pile cap plate precast block, penetrating vertical steel bars and connecting plates on the corresponding pile foundation into the reserved holes, and laying setting slurry on the first pile cap plate connecting keys;
Step three, hoisting the bearing plate precast block II, and penetrating vertical steel bars and connecting plates on the corresponding pile foundations into the reserved holes; the corrugated pipe penetrates into the corresponding prestressed beam, and the bearing plate connecting key II is connected with the bearing plate connecting key I through the slurry; the first connecting steel bar and the second connecting steel bar are mutually lapped, and reinforcing stirrups are bound;
fourthly, penetrating the shear steel bars through the steel bar openings on the connecting plates and connecting the shear steel bars with the embedded steel bars; tensioning a prestressed tendon, grouting into the corrugated pipe, and constructing anchor sealing concrete;
and fifthly, pouring concrete into the reserved hole after pouring, pouring materials into the pouring joint, and finishing construction after maintenance.
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