CN111827092A - Prefabricated assembled hollow pier suitable for being provided with diaphragm plate and construction method - Google Patents
Prefabricated assembled hollow pier suitable for being provided with diaphragm plate and construction method Download PDFInfo
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- CN111827092A CN111827092A CN202010606645.5A CN202010606645A CN111827092A CN 111827092 A CN111827092 A CN 111827092A CN 202010606645 A CN202010606645 A CN 202010606645A CN 111827092 A CN111827092 A CN 111827092A
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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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
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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Abstract
The invention provides a prefabricated assembled hollow pier with diaphragm plates and a construction method, and relates to the technical field of bridge construction. The foundation comprises a foundation, a general segment and a top cap segment from bottom to top, wherein the top of the foundation is provided with a foundation connecting steel bar and a foundation connecting column; common segmental diaphragm plates are arranged at the top and the bottom of the common segmental, a common segmental preformed groove is arranged on the common segmental diaphragm plate at the bottom, and a common segmental connecting steel bar is arranged on the common segmental diaphragm plate at the top; the bottom of the top cap section is provided with a top cap section diaphragm plate, and a top cap section preformed groove is formed in the top cap section diaphragm plate positioned at the bottom; during assembly, the connecting steel bars and the connecting columns which are positioned at the lower part are stretched into the corresponding preformed grooves which are positioned at the upper part, and high-strength slurry is poured into the preformed grooves; pre-burying prestressed pipelines in the foundation, the common sections and the top cap sections, and connecting by penetrating full-length prestressed bundles; by adopting the scheme, the prestress on the pier wall can be flexibly arranged and is simple and convenient to manufacture.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a prefabricated assembled hollow pier with diaphragm plates and a construction method.
Background
At present, when the bridge pier spans large rivers or oceans, the construction conditions are severe, the wind waves are large, the effective field operation time is short, the concrete pouring and curing are difficult, the bridge pier is not suitable for cast-in-place construction, the industrial and spliced construction has great advantages, the field operation time is greatly shortened, and the engineering quality is improved; the pier can be divided into large segments, and is assembled by large mechanical equipment, so that the pier is suitable for a hollow pier with a high height; the method is applied to bridge engineering in some water areas or sea areas at home and abroad.
Hollow pier often highly higher, the cross sectional dimension is big, and ordinary reinforcing bar has been arranged to the mound wall inside and outside equipartition, when adopting the prefabrication to assemble the construction, connects the degree of difficulty greatly between the intensive reinforcing bar, consequently adopts prestressing force to connect often, paints epoxy glue between each festival section promptly, and the connection between the rethread prestressing tendons realizes the festival. The sections of the connection mode are connected only through the prestressed tendons, so that the defects of insufficient energy consumption capacity, low ductility and the like exist, and the connection mode is not suitable for high-earthquake areas; the corrosion performance is high on the sea, the requirement on the durability is high, the prestressed tendons have corrosion risks, if the corrosion is serious, the connection failure can be caused, the structural safety is influenced, and the prestressed tendons are located in the duct and are not easy to inspect, repair and replace; meanwhile, when the height of the hollow pier is high and the length of the section is long, the problems of overall stability of the pier column, local stability of the pier wall and the like exist.
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 a prefabricated assembled hollow pier with a diaphragm plate and a construction method thereof, so as to solve the problems of insufficient energy consumption capability, low ductility and the like caused by only connecting through prestressed tendons in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a prefabricated assembled hollow pier suitable for a diaphragm plate, which sequentially comprises a foundation, a general segment and a top cap segment from bottom to top, wherein the top of the foundation is provided with foundation connecting steel bars and foundation connecting columns; common section diaphragm plates are arranged at the top and the bottom of the common section, common section preformed grooves are arranged on the common section diaphragm plate at the bottom, and common section connecting steel bars are arranged on the common section diaphragm plate at the top; the bottom of the top cap section is provided with a top cap section diaphragm plate, and a top cap section preformed groove is formed in the top cap section diaphragm plate positioned at the bottom; during assembly, the connecting steel bars and the connecting columns which are positioned at the lower part are stretched into the corresponding preformed grooves which are positioned at the upper part, and high-strength slurry is poured into the preformed grooves; the foundation, the common segments and the top cap segments are all pre-embedded with prestressed pipelines and are connected by penetrating full-length prestressed bundles, so that the connection performance among the segments is ensured; the prestressed tendon anchoring end is arranged in the foundation and is connected through a self-locking anchorage device, a full-length prestressed tendon penetrates through the top end of the foundation and then is locked in the foundation, and the prestressed tendon tensioning end at the top end of the top cap segment is tensioned to construct prestressed tendon sealing anchor; the outer protection is arranged around the joint of the foundation and the common segment, so that the durability of the seam of the pier bottom is enhanced.
In any of the above technical solutions, further, each diaphragm plate is located inside the hollow pier, the inner periphery of the pier wall is continuously or discontinuously arranged, the outer side of each diaphragm plate is connected with the inner side of the pier wall, and the joint is provided with a chamfer transition to reduce stress concentration; the segments are prefabricated together with the corresponding segments, so that the stress area below the segments is enlarged, and the stability during storage and assembly is enhanced.
In any of the above technical solutions, further the foundation connection steel bars and the general section connection steel bars are pre-embedded on the diaphragm plate and extend out of the surface of the corresponding section, the foundation stirrups and the general section stirrups are respectively arranged at the extending parts to reinforce the integrity between the connection steel bars and shorten the length of the connection steel bars, a plurality of steel reinforcement cages are respectively formed between the foundation connection steel bars and the foundation stirrups and between the general section connection steel bars and the general section stirrups and are arranged in a dispersed manner, and the steel reinforcement cages are circular or rectangular.
In any one of the above technical solutions, further, a gap is left between each of the preformed grooves and the outer contour of each of the corresponding connecting steel bars, the preformed grooves are conveniently penetrated into the gap, the peripheries of the preformed grooves are chiseled or corrugated pipes are pre-embedded, and the cross sections of the preformed grooves are circular or rectangular.
In any of the above technical solutions, further, the base connecting column and the general segment connecting column are both arranged on each diaphragm plate, prefabricated together with the corresponding segment and diaphragm plate, and internally provided with reinforcing steel bars to enhance the shear resistance, the outer contour diameter of each connecting column is smaller than the size of one side of the corresponding preformed groove, a gap is left between the base connecting column and the general segment connecting column for convenient penetration, the periphery of the base connecting column and the general segment connecting column is roughened, and the cross sections of the base connecting column and the general segment connecting column are circular or rectangular; the connecting column is used as a shearing-resistant structure among all the sections and has a positioning effect during section assembly; the connecting columns are dispersedly arranged above the transverse partition plates and are staggered with the connecting reinforcing steel bars.
In any of the above technical solutions, further, the high-strength slurry is ultra-high-performance concrete or high-strength grouting material, so that the preformed groove, the connecting bars and the connecting columns form a whole, the high-strength slurry can be ultra-high-performance concrete or high-strength grouting material, the required length of the connecting bars is shortened, and the connection safety is improved.
In any of the above technical solutions, further, an outer protection is provided around the joint of the foundation and the general section, a corrosion-resistant and wear-resistant UHPC is used, a foundation reserved steel bar joint and a general section reserved steel bar joint are respectively provided, after the assembly, a facing steel bar is bound, and the UHPC is poured, so that the outer protection is integrated with the foundation and the general section.
The invention provides a construction method suitable for a prefabricated assembled hollow pier with a diaphragm plate, which comprises the following steps:
step one, foundation construction, foundation connecting column construction, binding of foundation stirrups of foundation connecting steel bars, and prefabricating common sections and top cap sections to be assembled;
secondly, laying bottom joint high-strength mortar on the top surface of the foundation, hoisting general segments for installing by a mortar sitting method, penetrating foundation connecting steel bars and foundation connecting columns on the foundation into general segment preformed grooves on diaphragm plates of the general segments, and pouring high-strength mortar;
thirdly, laying middle joint epoxy resin glue on the top surface of the lower general segment, hoisting the upper general segment, penetrating the lower general segment connecting steel bar and the general segment connecting column into a top cap segment preformed groove on a top cap segment diaphragm plate, and pouring high-strength slurry;
laying epoxy resin glue with a middle joint seam on the top surface of the general segment, hoisting the top cap segment, penetrating the general segment connecting steel bar and the general segment connecting column into a top cap segment preformed groove on the transverse clapboard of the top cap segment, and pouring high-strength slurry;
step five, sequentially penetrating full-length prestressed tendons into the top cap segment, the general segment and the foundation pre-embedded prestressed pipeline from the top end of the top cap segment, tensioning the prestressed tendon tensioning end at the top end of the top cap segment, positioning the prestressed tendon anchoring end in the foundation, and constructing prestressed tendon sealing anchors;
sixthly, performing pipeline grouting on the pipeline with the full-length prestressed beam;
binding the facing steel bars with the reserved steel bar joints of the foundation and the reserved steel bar joints of the common sections, and pouring external protection.
The invention has the beneficial effects that:
the invention provides a prefabricated assembled hollow pier suitable for a diaphragm plate and a construction method, which have the following effects:
1. by additionally arranging the connecting steel bars, the defects of insufficient energy consumption and low ductility of the prestressed splicing piers are overcome, and the prestressed splicing piers can be suitable for high-seismic areas; the connecting steel bars do not occupy the space of the pier wall, and the prestress on the pier wall is flexibly arranged and is simple and convenient to manufacture; the construction of the connecting steel bar is not influenced by the severe conditions of the external environment, the construction is facilitated, and the appearance of the structure is not influenced; the connecting steel bars are positioned in the structure, so that the durability is good, and the connecting steel bars are suitable for the erosion environment;
2. by combining the prestressed steel bundles and the connecting steel bars, the connection performance of the joint is obviously improved, the risks of corrosion, failure and the like of the prestressed steel bundles existing in pure prestressed connection are compensated, the number of required prestressed forces is reduced, and the procedures of prestressed beam penetrating, tensioning and the like are simplified;
3. the transverse partition plates are arranged, so that the stability of the sections is improved, the section length of the pier column sections is increased, the number of joints is reduced, the overall stability of the pier and the local stability of the pier wall are improved, and the pier is particularly suitable for high piers in water areas or sea areas; when the cast-in-place construction of pier, receive influence such as inner formword creeping formwork, set up the cross slab and increase the construction degree of difficulty greatly, this scheme festival section adopts prefabricated construction, simple manufacture effectively solves the inconvenient problem of construction.
4. The connecting columns among the segments are also used as structural shear keys, and no shear key is arranged on the pier wall, so that the special template arrangement during segment manufacturing is simplified, the cost is saved, and the segment manufacturing progress is accelerated; and the accurate alignment of pier wall shear keys is not needed during assembly, so that the assembly speed is increased.
5. During the connecting reinforcement penetrated the reservation groove, construction tolerance was big, utilized the reservation groove to pour the template as high-strength slurry, construction convenience.
6. The connecting column is used as a positioning key for assembling the pier column, so that the positioning during assembling the segments is facilitated; the connecting column has large size, high construction quality and strong shearing resistance.
7. The pier wall diaphragm plate increases the area of the bottom of the segment, improves the stability of the storage and assembly process of the segment and facilitates temporary locking.
8. The bottom seam of the pier is usually positioned underwater and is easily influenced by water level change, scouring and the like, so that the durability of the seam is influenced.
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 structural diagram (one) of a vertical surface of a prefabricated assembled hollow pier suitable for being provided with diaphragm plates in the embodiment of the invention;
fig. 2 is a schematic structural view (two) of a vertical surface of a prefabricated assembled hollow pier provided by the embodiment of the invention and suitable for a diaphragm plate;
FIG. 3 is a schematic diagram of a foundation structure of a prefabricated assembled hollow pier with diaphragm plates according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a general segment of a prefabricated hollow pier suitable for being assembled with diaphragm plates according to an embodiment of the invention;
FIG. 5 is a schematic structural diagram of a top cap segment of a prefabricated assembled hollow pier provided by an embodiment of the invention and suitable for being used for a diaphragm;
fig. 6 is a schematic diagram (one) of joint assembly of a prefabricated assembled hollow pier with diaphragm plates according to an embodiment of the present invention;
fig. 7 is a schematic diagram (two) of joint assembly of a prefabricated assembled hollow pier with diaphragm plates according to the embodiment of the invention;
fig. 8 is a schematic diagram (three) of joint assembly of a prefabricated assembled hollow pier with diaphragm plates according to an embodiment of the present invention;
fig. 9 is a schematic view of an external protection structure suitable for a prefabricated assembled hollow pier with diaphragm plates, provided by the embodiment of the invention.
Icon:
1-a base;
101-foundation connecting steel bars;
102-a base stirrup;
103-a base connection column;
2-general section;
201-general section connecting steel bars;
202-general section stirrup;
203-a general segment connecting column;
204-general segmental diaphragms;
205-general segment reserve groove;
3-a top cap segment;
301-top cap segment diaphragm;
302-top cap segment pre-groove;
4-external protection;
401-foundation reserved steel bar joints;
402-general section reserved steel bar joint;
403-armor steel bars;
5-bottom seam;
6-middle joint;
7-prestressed pipe;
8-full length prestressed tendons;
801-prestressed tendon anchoring end;
802-prestressed tendon stretching end;
803-pre-stressed tendon sealing anchor;
9-grouting the pipeline;
10-high strength 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 9, for the corresponding structural schematic diagram of the prefabricated assembled hollow pier with diaphragm provided in this embodiment, the following description is made with reference to fig. 1 to 9:
the prefabricated assembled hollow pier suitable for the diaphragm plate comprises a foundation 1, a general segment 2 and a top cap segment 3 from bottom to top, wherein the top of the foundation 1 is provided with a connecting steel bar 101 and a connecting column 103; general section diaphragm plates 204 are arranged at the top and the bottom of the general section 2, general section preformed grooves 205 are arranged on the general section diaphragm plates 204 at the bottom, and connecting steel bars 201 are arranged on the general section diaphragm plates 204 at the top; a top cap section diaphragm plate 301 is arranged at the bottom of the top cap section 3, and a top cap section preformed groove 302 is arranged on the top cap section diaphragm plate 301 at the bottom; during assembly, the connecting steel bars and the connecting columns which are positioned at the lower part are stretched into the corresponding preformed grooves which are positioned at the upper part, and high-strength slurry 10 is poured into the preformed grooves; the foundation 1, the general segment 2 and the top cap segment 3 are all pre-embedded with prestressed pipelines 7, and are connected by penetrating through long prestressed tendons 8, so that the connection performance among the segments is ensured; the prestressed tendon anchoring end 801 is arranged in the foundation 1 and is connected through a self-locking anchorage device, a full-length prestressed tendon 8 penetrates from the top end and then is locked in the foundation 1, and the prestressed tendon tensioning end 802 at the top end of the top cap segment 3 is tensioned to seal the anchor 803 with the prestressed tendon; the joint of the foundation 1 and the general segment 2 is a bottom seam, and an outer protection 4 is arranged around the bottom seam, so that the durability of the bottom seam of the pier is enhanced.
Furthermore, all the diaphragm plates are positioned in the hollow pier, the periphery of the inner side of the pier wall is continuously or discontinuously arranged, the outer sides of all the diaphragm plates are connected with the inner side of the pier wall, and chamfer transition is arranged at the joint to reduce stress concentration; the segments are prefabricated together with the corresponding segments, so that the stress area below the segments is enlarged, and the stability during storage and assembly is enhanced.
Specifically, the general section diaphragm plates 204 and the top cap section diaphragm plates 301 are positioned in the hollow pier, the inner side circumference of the pier wall is continuously or discontinuously arranged, the outer sides of the diaphragm plates are connected with the inner side of the pier wall, and the joint is provided with chamfer transition; prefabricated together with the respective segments.
Further, foundation coupling bar 101, general section coupling bar 201 are all pre-buried on each cross slab to stretch out certain length, set up basic stirrup 102 on foundation coupling bar 101, set up general section stirrup 202 on general section coupling bar 201, strengthen the wholeness between the coupling bar, shorten coupling bar length, foundation coupling bar 101 and basic stirrup 102, general section coupling bar 201 and general section stirrup 202 respectively form a plurality of steel reinforcement cages, the dispersion is arranged, the steel reinforcement cage adopts circular or rectangle.
Further, the general segment preformed groove 205 and the top cap segment preformed groove 302 are respectively arranged on the transverse partition plates, the diameter size of each preformed groove is 5cm larger than one side of the outer contour of the corresponding connecting steel bar to form a gap, the gap is convenient to penetrate into the gap, roughening treatment or corrugated pipe pre-embedding is carried out on the periphery of each preformed groove, and the cross section of each preformed groove is circular or rectangular.
Furthermore, the basic connecting columns 103 and the general segment connecting columns 203 are arranged on the diaphragm plates, are prefabricated together with the corresponding segments and the diaphragm plates, are internally provided with reinforcing steel bars to enhance the shearing resistance, the outer contour diameter of each connecting column is 5cm smaller than one side of the corresponding reserved groove to form a gap, the connecting columns are convenient to penetrate, the periphery of each connecting column is roughened, and the cross section of each connecting column is circular or rectangular; each connecting column is used as a shearing-resistant structure between the segments and has a positioning effect during segment assembly; the connecting columns are dispersedly arranged above the transverse partition plates and are arranged in a staggered manner with the connecting steel bars.
Further, the high-strength slurry 10 adopts ultra-high performance concrete or high-strength grouting material, so that the preformed grooves, the connecting reinforcing steel bars and the connecting columns form a whole, the high-strength slurry 10 can adopt the ultra-high performance concrete or the high-strength grouting material, the required length of the connecting reinforcing steel bars is shortened, and the connection safety degree is improved.
Further, the outer protection 4 is located on the periphery of the bottom joint 5, corrosion-resistant and wear-resistant UHPC is adopted, a foundation reserved steel bar joint 401 and a general section reserved steel bar joint 402 are respectively arranged, after assembly, a protective face steel bar 403 is bound, and UHPC is poured, so that the outer protection 4, the foundation 1 and the general section 2 are connected into a whole.
The invention provides a construction method suitable for a prefabricated assembled hollow pier with a diaphragm plate, which comprises the following steps:
step one, constructing a foundation 1, constructing a foundation connecting column 103, binding a foundation stirrup 102 of a foundation connecting steel bar 101, and prefabricating a general segment 2 and a top cap segment 3 to be assembled;
step two, as shown in fig. 6-8, laying high-strength slurry 10 at the bottom joint 5 on the top surface of the foundation 1, hoisting the general segment 2 for installation by a mortar sitting method, penetrating the foundation connecting steel bar 101 and the foundation connecting column 103 on the foundation 1 into the general segment preformed groove 205 on the general segment diaphragm plate 204, and pouring the high-strength slurry 10;
thirdly, laying epoxy resin glue with a middle joint 6 on the top surface of the lower general segment 2, hoisting the upper general segment 2, penetrating the lower general segment connecting steel bar 201 and the general segment connecting column 203 into the top cap segment preformed groove 302 on the top cap segment diaphragm plate 301, and pouring high-strength slurry 10;
fourthly, laying epoxy resin glue with a middle joint 6 on the top surface of the common segment 2, hoisting the top cap segment 3, penetrating the common segment connecting steel bar 201 and the common segment connecting column 203 into a top cap segment preformed groove 302 on a top cap segment diaphragm 301, and pouring high-strength slurry 10;
fifthly, penetrating full-length prestressed tendons 8 into the pre-buried prestressed pipelines 7 of the top cap segment 3, the general segment 2 and the foundation 1 from the top end of the top cap segment 3 in sequence, tensioning the prestressed tendon tensioning end 802 at the top end of the top cap segment 3, positioning the prestressed tendon anchoring 801 end in the foundation 1, and constructing prestressed tendon seal anchors 803;
sixthly, performing pipeline grouting 9 on the pipeline with the full-length prestressed beam 8;
seventhly, binding the protective steel bars 403 with the reserved steel bar joints 401 of the foundation and the reserved steel bar joints 402 of the general sections, and pouring the outer protection 4 as shown in fig. 9.
The embodiment of the invention provides a prefabricated assembled hollow pier suitable for a diaphragm plate and a construction method, and the construction method has the following effects:
1. by additionally arranging the connecting steel bars, the defects of insufficient energy consumption and low ductility of the prestressed splicing piers are overcome, and the prestressed splicing piers can be suitable for high-seismic areas; the connecting steel bars do not occupy the space of the pier wall, and the prestress on the pier wall is flexibly arranged and is simple and convenient to manufacture; the construction of the connecting steel bar is not influenced by the severe conditions of the external environment, the construction is facilitated, and the appearance of the structure is not influenced; the connecting steel bars are positioned in the structure, so that the durability is good, and the connecting steel bars are suitable for the erosion environment;
2. by combining the prestressed steel bundles and the connecting steel bars, the connection performance of the joint is obviously improved, the risks of corrosion, failure and the like of the prestressed steel bundles existing in pure prestressed connection are compensated, the number of required prestressed forces is reduced, and the procedures of prestressed beam penetrating, tensioning and the like are simplified;
3. the transverse partition plates are arranged, so that the stability of the sections is improved, the section length of the pier column sections is increased, the number of joints is reduced, the overall stability of the pier and the local stability of the pier wall are improved, and the pier is particularly suitable for high piers in water areas or sea areas; when the cast-in-place construction of pier, receive influence such as inner formword creeping formwork, set up the cross slab and increase the construction degree of difficulty greatly, this scheme festival section adopts prefabricated construction, simple manufacture effectively solves the inconvenient problem of construction.
4. The connecting columns among the segments are also used as structural shear keys, and no shear key is arranged on the pier wall, so that the special template arrangement during segment manufacturing is simplified, the cost is saved, and the segment manufacturing progress is accelerated; and the accurate alignment of pier wall shear keys is not needed during assembly, so that the assembly speed is increased.
5. During the connecting reinforcement penetrated the reservation groove, construction tolerance was big, utilized the reservation groove to pour the template as high-strength slurry, construction convenience.
6. The connecting column is used as a positioning key for assembling the pier column, so that the positioning during assembling the segments is facilitated; the connecting column has large size, high construction quality and strong shearing resistance.
7. The pier wall diaphragm plate increases the area of the bottom of the segment, improves the stability of the storage and assembly process of the segment and facilitates temporary locking.
8. The bottom seam of the pier is usually positioned underwater and is easily influenced by water level change, scouring and the like, so that the durability of the seam is influenced.
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 (8)
1. The utility model provides a hollow pier is assembled in prefabrication suitable for take diaphragm, by down and on in proper order including basis (1), general festival section (2) and hood festival section (3), its characterized in that:
the top of the foundation (1) is provided with foundation connecting steel bars (101) and foundation connecting columns (103);
common segment diaphragm plates (204) are arranged at the top and the bottom of the common segment (2), common segment preformed grooves (205) are arranged on the common segment diaphragm plates (204) at the bottom, and common segment connecting steel bars (201) are arranged on the common segment diaphragm plates (204) at the top;
a top cap section diaphragm plate (301) is arranged at the bottom of the top cap section (3), and a top cap section preformed groove (302) is arranged on the top cap section diaphragm plate (301) positioned at the bottom;
during assembly, the connecting steel bars and the connecting columns which are positioned at the lower part are stretched into the corresponding preformed grooves which are positioned at the upper part, and high-strength slurry (10) is poured into the preformed grooves;
the foundation (1), the general sections (2) and the top cap sections (3) are all pre-embedded with prestressed pipelines (7) and are connected by penetrating full-length prestressed bundles (8);
an outer protection (4) is arranged around the joint of the foundation (1) and the general segment (2).
2. The prefabricated assembled hollow pier suitable for the diaphragm plates is characterized in that each diaphragm plate is positioned inside the hollow pier, the periphery of the inner side of the pier wall is continuously or discontinuously arranged, the outer side of each diaphragm plate is connected with the inner side of the pier wall, and the joint is provided with chamfer transition and is prefabricated together with the corresponding segment.
3. The prefabricated hollow pier suitable for the diaphragm plate is characterized in that the foundation connecting steel bars (101) and the general section connecting steel bars (201) are embedded in the diaphragm plate and extend out of the surface of the corresponding section, the foundation stirrups (102) and the general section stirrups (202) are respectively arranged at the extending parts, a plurality of steel reinforcement cages are respectively formed between the foundation connecting steel bars (101) and the foundation stirrups (102) and between the general section connecting steel bars (201) and the general section stirrups (202) and are distributed, and the steel reinforcement cages are circular or rectangular.
4. The precast assembled hollow pier suitable for the diaphragm plate according to claim 1, wherein a gap is left between each of the preformed grooves and the outer contour of each of the corresponding connecting steel bars, the peripheries of the preformed grooves are roughened or corrugated pipes are embedded, and the cross section of each of the preformed grooves is circular or rectangular.
5. The prefabricated hollow pier suitable for the diaphragm plates, as claimed in claim 1, wherein the foundation connecting column (103) and the general segment connecting column (203) are both arranged on each diaphragm plate, prefabricated together with the corresponding segment and the diaphragm plates, and internally provided with reinforcing steel bars, the outer contour diameter of each connecting column is smaller than the size of one side of each reserved groove, a gap is left between the outer contour diameter and the corresponding reserved groove, the peripheries of the foundation connecting column (103) and the general segment connecting column (203) are roughened, and the sections of the foundation connecting column (103) and the general segment connecting column (203) are circular or rectangular; the connecting columns are dispersedly arranged above the transverse partition plates and are staggered with the connecting reinforcing steel bars.
6. The prefabricated assembled hollow pier suitable for the diaphragm plate is characterized in that the high-strength slurry (10) is ultra-high-performance concrete or high-strength grouting material according to claim 1.
7. The prefabricated assembled hollow pier suitable for the diaphragm plate is characterized in that an outer protection part (4) is arranged around the joint of the foundation (1) and the general section (2), corrosion-resistant and wear-resistant UHPC is adopted, a foundation reserved steel bar joint (401) and a general section reserved steel bar joint (402) are respectively arranged, and a protective steel bar is bound after assembly.
8. A construction method suitable for a prefabricated assembled hollow pier with a diaphragm plate is characterized by comprising the following steps:
the method comprises the following steps of firstly, constructing a foundation (1), constructing a foundation connecting column (103), binding a foundation stirrup (102) of a foundation connecting steel bar (101), prefabricating a general segment (2) and a top cap segment (3) to be assembled;
secondly, paving high-strength mortar at a bottom joint (5) on the top surface of the foundation (1), hoisting the general sections (2) for installation by a mortar sitting method, penetrating foundation connecting steel bars (101) and foundation connecting columns (103) on the foundation (1) into general section preformed grooves (205) on the transverse partition plates (204) of the general sections, and pouring high-strength mortar (10);
thirdly, laying epoxy resin glue of a middle joint (6) on the top surface of the lower general segment, hoisting the upper general segment, penetrating the lower general segment connecting steel bar and the general segment connecting column (203) into a top cap segment preformed groove (302) on a top cap segment diaphragm plate (301), and pouring high-strength slurry (10);
fourthly, laying epoxy resin glue of a middle joint (6) on the top surface of the common segment (2), hoisting the top cap segment (3), penetrating the common segment connecting steel bar (201) and the common segment connecting column (203) into a top cap segment preformed groove (302) on a top cap segment diaphragm plate (301), and pouring high-strength slurry (10);
fifthly, penetrating full-length prestressed tendons (8) into pre-buried prestressed pipelines (7) of the top cap segment (3), the general segment (2) and the foundation (1) in sequence from the top end of the top cap segment (3), tensioning from a prestressed tendon tensioning end (802) at the top end of the top cap segment (3), positioning a prestressed tendon anchoring end (801) in the foundation (1), and constructing prestressed tendon sealing anchors (803);
sixthly, performing pipeline grouting (9) on the pipeline with the full-length prestressed tendon (8);
and seventhly, binding the protective steel bars (403) with the reserved steel bar joints (401) of the foundation and the reserved steel bar joints (402) of the common sections, and pouring the outer protection (4).
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| CN202010606645.5A CN111827092A (en) | 2020-06-29 | 2020-06-29 | Prefabricated assembled hollow pier suitable for being provided with diaphragm plate and construction method |
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| CN202010606645.5A CN111827092A (en) | 2020-06-29 | 2020-06-29 | Prefabricated assembled hollow pier suitable for being provided with diaphragm plate and construction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853983A (en) * | 2021-01-11 | 2021-05-28 | 山东高速建设管理集团有限公司 | Manufacturing and on-site assembling process of light segment prefabricated bridge pier |
| CN113123243A (en) * | 2021-04-16 | 2021-07-16 | 长江勘测规划设计研究有限责任公司 | Construction method for conveniently installing hollow pier diaphragm plate device |
| CN113481870A (en) * | 2021-08-11 | 2021-10-08 | 柳州欧维姆机械股份有限公司 | Prestressed anchoring structure system for assembling multi-segment bridge pier and assembling construction method of multi-segment bridge pier |
| CN113668367A (en) * | 2021-09-02 | 2021-11-19 | 中铁十一局集团第五工程有限公司 | Hollow pier diaphragm plate pouring construction method |
| CN113756193A (en) * | 2021-08-27 | 2021-12-07 | 中铁七局集团有限公司 | Hollow pier construction method |
| CN117005305A (en) * | 2023-07-05 | 2023-11-07 | 中国铁建港航局集团有限公司 | Construction method for constructing upper capping beam in prestressed concrete common pier section |
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2020
- 2020-06-29 CN CN202010606645.5A patent/CN111827092A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853983A (en) * | 2021-01-11 | 2021-05-28 | 山东高速建设管理集团有限公司 | Manufacturing and on-site assembling process of light segment prefabricated bridge pier |
| CN113123243A (en) * | 2021-04-16 | 2021-07-16 | 长江勘测规划设计研究有限责任公司 | Construction method for conveniently installing hollow pier diaphragm plate device |
| CN113123243B (en) * | 2021-04-16 | 2022-05-31 | 长江勘测规划设计研究有限责任公司 | Construction method for conveniently installing hollow pier diaphragm plate device |
| CN113481870A (en) * | 2021-08-11 | 2021-10-08 | 柳州欧维姆机械股份有限公司 | Prestressed anchoring structure system for assembling multi-segment bridge pier and assembling construction method of multi-segment bridge pier |
| CN113756193A (en) * | 2021-08-27 | 2021-12-07 | 中铁七局集团有限公司 | Hollow pier construction method |
| CN113756193B (en) * | 2021-08-27 | 2022-12-23 | 中铁七局集团有限公司 | Hollow pier construction method |
| CN113668367A (en) * | 2021-09-02 | 2021-11-19 | 中铁十一局集团第五工程有限公司 | Hollow pier diaphragm plate pouring construction method |
| CN117005305A (en) * | 2023-07-05 | 2023-11-07 | 中国铁建港航局集团有限公司 | Construction method for constructing upper capping beam in prestressed concrete common pier section |
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