CN111877140A - Connecting structure for segment prefabricated assembled pier combination and construction method - Google Patents
Connecting structure for segment prefabricated assembled pier combination and construction method Download PDFInfo
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- CN111877140A CN111877140A CN202010030383.2A CN202010030383A CN111877140A CN 111877140 A CN111877140 A CN 111877140A CN 202010030383 A CN202010030383 A CN 202010030383A CN 111877140 A CN111877140 A CN 111877140A
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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
- 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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Abstract
A connecting structure for a segment prefabricated assembly type pier combination is provided with a pier column and a base, wherein the pier column consists of a first segment and a second segment, the bottom of the first segment is connected with the base, the top of the first segment is connected with the bottom of the second segment, pipelines are respectively embedded in the first segment and the second segment, connecting steel bars and prestressed bundles are respectively arranged in the pipelines, a shear key is preset at the top of the first segment, a grouting pipe is preset at the bottom of the first segment, a shear key groove and a shear key are arranged at the bottom of the second segment and matched for use, one end of each prestressed bundle is tensioned at the top end of the second segment, and the other end of each prestressed bundle is anchored with the base; one end of the connecting steel bar is fixedly connected with the top of the second section, and the other end of the connecting steel bar is mechanically connected and fixed with the joint steel bar; meanwhile, the prefabricated assembled pier can meet the earthquake-resistant requirement of a high-earthquake area, the residual displacement is reduced, and the post-earthquake repair of the assembled pier is facilitated.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a connecting structure for a segment prefabricated assembled pier combination and a construction method.
Background
In recent years, with the active advancement and technical development of prefabricated assembled buildings, the research of constructing bridge substructure by adopting a segmental prefabricated assembling method at home and abroad becomes a hotspot, and in the fields of railways, urban rail transit, highways, municipal engineering and the like, the applicability of the connection form of the prefabricated assembled piers is different under the different influences of the stress requirements, the structural characteristics and the like of the piers.
In the municipal works field, the prefabricated pin-connected panel pier steel sleeve grout connection technology commonly used of festival section, this connection needs pre-buried grout sleeve and reserved steel bar joint in prefabricated section, it is high to installation accuracy and construction requirement, when pier height is high or cross section size is great, receive the restriction of section transportation size, a plurality of sections need to be divided along the direction of height to the pier, when adopting the sleeve grout to connect, every reinforcing bar sets up the joint, need set up a plurality of joints on the cross section, all need to connect grout sleeve when every section is assembled, it is big to cause the construction degree of difficulty, high cost, especially to the multisection section, jumbo size pier, this connection technology receives certain restriction.
In the field of highway engineering, segment prefabricated assembled piers are also connected by common prestressed tendons, prestressed ducts are reserved in segments, prestressed steel strands penetrate into the segments to form segment-to-segment connection, prestress needs to be tensioned in the connection, the prestress cost is high, loss and failure risks exist in the prestress, meanwhile, the assembled piers connected by the prestress have the problems of weak energy consumption capacity, insufficient ductility and the like according to theoretical research, experimental verification and practical experience at home and abroad, and are not suitable for high-earthquake areas.
Disclosure of Invention
The invention provides a connecting structure and a construction method for a segment prefabricated assembled pier combination, aims to solve the problems in the prior art, and provides a connecting structure and a construction method for a segment prefabricated assembled pier combination, which are used for assembling a multi-segment large-section pier, are reliable in connection, large in construction tolerance, low in precision requirement, strong in section shearing resistance and low in cost, can meet the seismic requirements of high-seismic regions, reduce residual displacement and are beneficial to post-seismic repair of assembled piers.
The technical scheme adopted by the invention for solving the problems is as follows:
the utility model provides a connection structure that is used for prefabricated pin-connected panel pier of festival section to make up has pier stud and base, and the pier stud is located the base top, with base fixed connection, its characterized in that: the pier column is composed of a first section and a second section, the bottom of the first section is connected with the base, the top of the first section is connected with the bottom of the second section, pipelines are respectively embedded in the first section and the second section, glue squeezing grooves are respectively arranged at the bottoms of the first section and the second section, a shear key is preset at the top of the first section, a grouting pipe is preset on the side wall of the lower part of the first section, a shear key groove is arranged at the bottom of the second section, the shear key groove is matched with the shear key for use, the position of the shear key groove corresponds to a shear key arranged at the top of the first section, and the shape and size of the shear key groove are matched with the shear key; a prestressed tendon is arranged in one part of the pipeline, one end of the prestressed tendon is tensioned from the top end of the second segment of the embedded pipeline, and the other end of the prestressed tendon penetrates out of the bottom of the first segment of the embedded pipeline and is anchored with the base; and continuous connecting steel bars are arranged in the other part of pipeline, the connecting steel bars are fixedly connected through mechanical connection, one ends of the connecting steel bars are positioned at the top of the second section and fixedly connected with the top of the second section, and the other ends of the connecting steel bars penetrate out of the bottom of the first section and are fixedly connected with joint steel bars arranged at the top of the base.
And one part of pipelines pre-embedded in the first section and the second section are corrugated pipe channels, the other part of pipelines are steel pipes, connecting steel bars penetrate through the corrugated pipe channels, prestress bundles penetrate through the steel pipes, and grouting materials are poured into the corrugated pipe channels.
The embedded bellows pore and the steel pipe position in first subsection and the second subsection correspond one-to-one respectively, the joint reinforcing bar position one-to-one that pre-buried bellows pore and base top were equipped with in the first subsection, the bellows pore at second subsection top is worn out to the fixed connecting reinforcement one end of mechanical connection, through the cooperation of reinforcing bar anchor bolt and reinforcing bar anchor backing plate and the top fixed connection of second subsection, the bellows pore bottom that the other end of connecting reinforcement passed in the first subsection is equipped with joint reinforcing bar mechanical connection with the base top, the diameter ratio connecting reinforcement's in bellows pore is 25cm big than the diameter.
The steel pipes are embedded in the base, the positions of the steel pipes embedded in the base and the positions of the steel pipes embedded in the first section are in one-to-one correspondence respectively, the other end of the prestressed tendon penetrates through the steel pipes embedded in the first section and the steel pipes embedded in the base, the end portion of each steel pipe embedded in the base is anchored, a prestressed grouting pipe is arranged on the base, and the prestressed grouting pipe is communicated with the steel pipes embedded in the base.
The base is a cast-in-place base, and the length of the joint reinforcing steel bars arranged at the top of the base is different.
The shear key is in a circular truncated cone shape, the vertical section of the shear key is in an isosceles trapezoid shape, the included angle between the inclined edge and the bottom edge of the trapezoid is 45 degrees, and the shear key is meshed with the shear key groove.
The glue extruding grooves are respectively positioned at the bottoms of the first section and the second section and divide the first section and the second section into a plurality of areas, the cross section of each glue extruding groove in the horizontal direction is square or rectangular, and the side length is 2-10 cm.
The corrugated pipe type steel pipe joint is characterized in that a heightening section is arranged between the first section and the second section, the positions of a corrugated pipe hole and a steel pipe in the heightening section are respectively in one-to-one correspondence with the positions of the corrugated pipe hole and the steel pipe in the first section and the second section, the bottom structure of the heightening section is the same as the bottom structure of the second section, and the top structure of the heightening section is the same as the top structure of the first section.
A construction method of a connecting structure for a segment prefabricated assembly type pier combination is characterized by comprising the following steps: comprises the following steps
Firstly, casting a base on site, wherein a first section and a second section are prefabricated in a factory;
hoisting the first section, penetrating a connecting steel bar into a pipeline pre-buried in the first section, and temporarily fixing the connecting steel bar on the top of the first section; supporting the first segment on a temporary jack, and adjusting the spatial position of the segment by the temporary jack; then removing the temporary fixation of the connecting steel bars, lowering the connecting steel bars to the joint positions, mechanically connecting and fixing the connecting steel bars and the joint steel bars in a one-to-one correspondence manner, roughening the top surface area of the base, laying a mortar cushion layer, removing the temporary jack, lowering the first section for mounting by a mortar sitting method, and extruding redundant slurry through a glue extruding groove to realize the connection between the first section and the base;
hoisting a second section, moving the temporary jack to the top surface of the first section, hoisting the second section, penetrating a connecting steel bar into a pipeline pre-buried in the second section, and temporarily fixing the connecting steel bar on the top of the second section; supporting the second section on a temporary jack, and adjusting the spatial position of the second section through the temporary jack; the temporary fixation of the connecting steel bars on the top of the second section is released, the connecting steel bars are lowered to the position connected with the top of the first section, the heads of the connecting steel bars on the top of the first section are mechanically connected and fixed with the connecting steel bars on the bottom of the second section in a one-to-one correspondence mode, epoxy resin glue is laid on the top of the first section, a temporary jack is removed, the second section is lowered, shear keys arranged on the top of the first section are in one-to-one correspondence with shear key grooves arranged on the bottom of the second section, the second section is installed and fixed with the first section through a glue squeezing method, and redundant glue is squeezed out through a glue squeezing groove, so that the fixed connection between the second section and the first section is realized;
step four, cleaning the slurry of the glue extruding groove after the sections are assembled, and filling joints after the cleaning is finished;
fifthly, grouting the grouting material into the pipeline where each connecting steel bar is located through the grouting pipe, and anchoring the connecting steel bars in the prefabricated sections;
step six, fixing one end of the connecting steel bar at the top of the second section;
step seven, when the prestressed tendons are arranged, penetrating the prestressed tendons into the pre-buried pipeline from the top of the second segment, when the prestressed tendons penetrate into the base, performing anchoring connection on the prestressed tendons and the base through an anchoring structure, tensioning the prestressed tendons one by one from the top of the second segment, and when bonding prestress is adopted, pouring prestressed grouting materials into the pre-buried pipeline through which the prestressed tendons penetrate;
and step eight, after the maintenance of all the slurry is finished, removing the grouting pipeline outside the structure, and finishing the construction.
A construction method of a connecting structure for a segment prefabricated assembly type pier combination is characterized by comprising the following steps: when a plurality of segments are used, a higher segment is added between the first segment and the second segment, a step b is added between the second step and the third step,
b, hoisting the heightened section, moving a temporary jack to the top surface of the first section, hoisting the heightened section, penetrating a connecting steel bar into a pipeline pre-embedded in the heightened section, and temporarily fixing the heightened section on the top of the heightened section; supporting the heightened sections on a temporary jack, and adjusting the spatial positions of the heightened sections through the temporary jack; the temporary fixation of the connecting steel bars on the top of the heightened section is released, the connecting steel bars are lowered to the position connected with the top of the first section, the head of the connecting steel bars on the top of the first section and the connecting steel bars on the bottom of the heightened section are mechanically connected and fixed in a one-to-one correspondence mode, epoxy resin glue is laid on the top of the first section, a temporary jack is removed, the heightened section is lowered, shear keys arranged on the top of the first section and shear key grooves arranged on the bottom of the heightened section are in one-to-one correspondence mode, the heightened section is installed and fixed with the first section through a glue squeezing method, and redundant glue is squeezed out through a glue squeezing groove, so that the fixed connection between the heightened section and the;
the third step is that: hoisting the second section, moving the temporary jack to the top surface of the heightened section, hoisting the second section, penetrating the connecting steel bar into the pipeline pre-buried in the second section, and temporarily fixing the connecting steel bar on the top of the second section; supporting the second section on a temporary jack, and adjusting the spatial position of the second section through the temporary jack; the temporary fixation of the connecting steel bars at the top of the second section is released, the connecting steel bars are placed to the position where the top of the heightened section is connected, the head of the connecting steel bars at the top of the heightened section is mechanically connected and fixed with the connecting steel bars at the bottom of the second section in a one-to-one correspondence mode, epoxy resin glue is laid at the top of the heightened section, the temporary jack is removed, the second section is placed, the shear keys arranged at the top of the heightened section are in one-to-one correspondence with the shear key grooves arranged at the bottom of the second section, the second section is installed and fixed with the heightened section through a glue squeezing method, and redundant glue is squeezed out through a glue squeezing groove, so that the fixed connection between the second section and.
The invention has the beneficial effects that: the connecting structure has the advantages of large construction tolerance, low precision requirement, strong section shearing resistance and low cost, and is suitable for splicing multi-section large-section piers; meanwhile, the prestress can be omitted or reduced, the energy consumption capability is strong, the prefabricated assembled pier can meet the earthquake resistant requirement of a high-earthquake area, the residual displacement is reduced, and the post-earthquake repair of the assembled pier is facilitated.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of an exploded structure of the present invention;
FIG. 3 is a top plan view of the first segment of the present invention;
FIG. 4 is a top plan view of a second segment of the present invention;
FIG. 5 is a schematic view of a shear key configuration of the present invention;
FIG. 6 is a schematic structural view of the first segment of the present invention before construction in conjunction with a foundation;
FIG. 7 is a schematic structural view of a first segment of the present invention in connection with a foundation;
FIG. 8 is a schematic pre-construction configuration of the first and second sections of the present invention;
FIG. 9 is a schematic structural diagram of a prestressed tendon construction process according to the present invention;
FIG. 10 is a schematic view of a heightened segment construction according to the present invention;
fig. 11 is a schematic structural view of the present invention with a section of elevated section added.
Wherein: 1. pier studs; 2. a base; 3. a first segment; 23. a first seam; 4. a second segment; 34. a second seam; 5. connecting reinforcing steel bars; 6. a bellows duct; 7. pre-stressing tendons; 8. a steel pipe; 9. jointing the reinforcing steel bars; 10. a glue extruding groove; 11. a shear key; 12. a mud jacking pipe; 13. a shear key groove; 14. a reinforcing steel bar anchoring bolt; 15. steel bar anchoring backing plates; 16. a prestressed mud jacking pipe; 17. a heightened segment; 18. a temporary jack; 19. prestressed grouting material; 20. pressing the slurry; 21. and (4) mechanically connecting.
Detailed Description
The invention is further described below with reference to the accompanying drawings and specific examples.
As shown in fig. 1-9, a connecting structure for a segment prefabricated assembly type pier combination comprises a pier stud 1 and a base 2, wherein the pier stud 1 is located above the base 2 and is fixedly connected with the base 2, the pier stud 1 is composed of a first segment 3 and a second segment 4, the bottom of the first segment 3 is connected with the base 2 in a splicing manner through a first seam 23, the top of the first segment 3 is connected with the bottom of the second segment 4 in a splicing manner through a second seam 34, pipelines are respectively pre-buried in the first segment 3 and the second segment 4, a corrugated pipe duct 6 passes through the connecting steel bar 5 in the pipeline, continuous connecting steel bars 5 are arranged in the corrugated pipe duct 6, the connecting steel bars 5 are fixed through a mechanical connection 21, the corrugated pipe with one end of the connecting steel bar 5 penetrating out of the top of the second segment 4 is fixedly connected with the top of the second segment 4 through the matching of a steel bar anchoring bolt 14 and an anchoring backing plate 15, the other end of the pre-stressed tendon 7 penetrates through the bottom of a corrugated pipe hole in the first section 3 and is fixed with a joint reinforcing steel bar 9 arranged at the top of the base 2 through a mechanical connection 21, a steel pipe 8 penetrates through the pipeline, one end of the pre-stressed tendon 7 is stretched from the top end of a pre-embedded steel pipe 8 in the second section 4, the other end of the pre-stressed tendon 7 penetrates through the bottom of the pre-embedded steel pipe 8 in the first section 3 and is anchored with the base 2, the positions of the corrugated pipe holes 6 pre-embedded in the first section 3 and the second section 4 are respectively in one-to-one correspondence, the positions of the steel pipes 8 pre-embedded in the first section 3 and the second section 4 are respectively in one-to-one correspondence, the corrugated pipe holes 6 pre-embedded in the first section 3 and the positions of the joint reinforcing steel bars 9 arranged at the top of the base 2 are in one-to-one correspondence, the bottoms of the first section 3 and the second section 4, the bottom of the second section 4 is provided with a shear key groove 13, the shear key groove 13 is matched with the shear key 11 for use, the position of the shear key groove 13 corresponds to the shear key 11 arranged at the top of the first section, the shape and the size of the shear key groove 13 are matched with the shear key 11, the steel pipes 8 are pre-embedded in the base 2, the positions of the steel pipes 8 pre-embedded in the base 2 and the positions of the steel pipes 8 pre-embedded in the first section 3 are respectively in one-to-one correspondence, the other end of the prestressed beam 7 passes through the steel pipes 8 pre-embedded in the first section 3 and the steel pipes 8 pre-embedded in the base 2, the end part of the steel pipe 8 pre-embedded in the base 2 is anchored, the base 2 is provided with a prestressed grouting pipe 16, the prestressed grouting pipe 16 is communicated with the steel pipe 8 pre-embedded in the base 2, the base 2 is a cast-in-place base, the length of a joint reinforcing steel bar 9 arranged at the top of the base 2 is different, and the diameter of the corrugated pipe pore passage 6 is 2-5cm larger than that of the connecting reinforcing steel bar 5.
The shear key 11 is in a circular truncated cone shape, the vertical section of the shear key 11 is in an isosceles trapezoid shape, the included angle between the inclined edge and the bottom edge of the trapezoid is 45 degrees, and the shear key 11 is meshed with the shear key groove 13.
The glue extruding grooves 10 are respectively located at the bottoms of the first section 3 and the second section 4, the first section 3 and the second section 4 are respectively divided into a plurality of areas, the cross section of the glue extruding grooves 10 in the horizontal direction is square or rectangular, the side length is 2-10cm, and when the two glue extruding grooves 10 are respectively arranged at the bottoms of the first section 3 and the second section 4, the bottoms of the first section 3 and the second section 4 are equally divided into three areas.
When a plurality of segments are adopted as shown in fig. 10 and 11, a heightened segment 17 is additionally arranged between the first segment 3 and the second segment 4, the positions of the corrugated pipe openings 6 and the steel pipes 8 arranged in the heightened segment 17 correspond to the positions of the corrugated pipe openings 6 and the steel pipes 8 arranged in the first segment 3 and the second segment 4 respectively one by one, the bottom structure of the heightened segment 17 is the same as the structure of the bottom of the second segment, and the top structure of the heightened segment is the same as the structure of the top of the first segment.
The heightened section 17 may be plural.
The specific steps for implementing the structure are as follows:
firstly, pouring a base 2 on site, and prefabricating a first section 3 and a second section 4 in a factory;
step two, when the first section 3 is hoisted, connecting steel bars 5 penetrate into a corrugated pipe pore passage 6 pre-buried in the first section and are temporarily fixed at the top of the first section 3; supporting the first segment 3 on a temporary jack 18, adjusting the spatial position of the first segment 3 by the temporary jack 18; then removing the temporary fixation of the connecting steel bars 5, lowering the connecting steel bars 5 to the joint position, enabling the connecting steel bars 5 and the joint steel bars 9 to be in one-to-one correspondence and fixed through mechanical connection 21, chiseling the top surface area of the base 2, laying a mortar cushion layer, removing the temporary jack 18, lowering the first section 3 for mounting by a mortar sitting method, and extruding redundant slurry through the glue extruding groove 10 to realize the connection between the first section 3 and the base 2;
step three, when the second section 4 is hoisted, the temporary jack 18 is moved to the top surface of the first section 3, the second section 4 is hoisted, the connecting steel bar 5 is penetrated into the corrugated pipe pore canal 6 pre-buried in the second section 4 and is temporarily fixed at the top of the second section 4; supporting the second segment 4 on a temporary jack 18, and adjusting the spatial position of the second segment 4 by the temporary jack 18; the temporary fixation of the connecting steel bars 5 on the top of the second section 4 is released, the connecting steel bars 5 are lowered to the position connected with the top of the first section 3, the heads of the connecting steel bars 5 on the top of the first section 3 are in one-to-one correspondence with the connecting steel bars 5 at the bottom of the second section 4 and are fixed through mechanical connection 21, epoxy resin glue is laid on the top of the first section 3, a temporary jack 18 is removed, the second section 4 is lowered, shear keys 11 arranged on the top of the first section 4 are in one-to-one correspondence with shear key grooves 13 arranged at the bottom of the second section 4, the second section 4 is installed and fixed with the first section 3 through glue squeezing, and redundant glue is squeezed out through a glue squeezing groove, so that the fixed connection between the second section 4 and the first section 3 is realized;
step four, cleaning the slurry of the glue extruding groove 10 after the sections are assembled, and filling joints after the cleaning is finished;
fifthly, grouting the grouting material 20 into the pipeline where each connecting steel bar is located through the grouting pipe 12, and anchoring the connecting steel bars 5 in the prefabricated sections;
step six, fixing one end of the connecting steel bar 5 at the top of the second section 4;
step seven, when the prestressed tendons 7 are arranged, penetrating the prestressed tendons 7 into the embedded steel pipes 8 from the top of the second section 4, when the prestressed tendons 7 penetrate into the base 2, performing anchoring connection on the prestressed tendons 7 and the base 2 through an anchoring structure, tensioning the prestressed tendons 7 one by one from the top end of the second section 4, and when bonding prestress is adopted, pouring prestressed grouting materials 19 into the embedded steel pipes 8 through which the prestressed tendons 7 penetrate through the prestressed grouting pipes 16;
and step eight, after all the slurry is cured, removing the grouting pipes 12 and the prestressed grouting pipes 16 outside the structure, and completing construction.
When a plurality of segments is used, a higher segment 17 is provided between the first segment 3 and the second segment 4, a step b is added between the above-mentioned second and third steps,
step b, when the heightened section 17 is hoisted, the temporary jack 18 is moved to the top surface of the first section 3, the heightened section 17 is hoisted, the connecting steel bars 5 penetrate into the corrugated pipe pore 6 pre-buried in the heightened section 17, and the connecting steel bars are temporarily fixed at the top of the heightened section; supporting the heightened section 17 on a temporary jack 18, and adjusting the spatial position of the heightened section 17 through the temporary jack 18; the temporary fixation of the connecting steel bars 5 on the top of the heightened section 17 is released, the connecting steel bars 5 are lowered to the position connected with the top of the first section 3, the heads of the connecting steel bars 5 on the top of the first section 3 are in one-to-one correspondence with the connecting steel bars at the bottom of the heightened section 17 and are mechanically connected 21, epoxy resin glue is laid on the top of the first section 3, a temporary jack 18 is removed, the heightened section 17 is lowered, shear keys 11 arranged on the top of the first section 3 are in one-to-one correspondence with shear key grooves 13 arranged at the bottom of the heightened section 17, the heightened section 17 is installed and fixed with the first section 3 by glue squeezing, and redundant glue is squeezed out through a glue squeezing groove, so that the fixed connection between the heightened section 17 and the first section 3 is realized;
the third step is that: hoisting the second section, moving the temporary jack 18 to the top surface of the heightened section 17, penetrating the connecting steel bars 5 into the corrugated pipe pore canal 64 pre-embedded in the second section 4, and temporarily fixing the connecting steel bars on the top of the second section; supporting the second section on a temporary jack 18, and adjusting the spatial position of the second section 4 through the temporary jack 18; the temporary fixation of the connecting steel bars 5 on the top of the second section is released, the connecting steel bars 5 are lowered to the position connected with the top of the heightened section 17, the heads of the connecting steel bars 5 on the top of the heightened section 17 correspond to the connecting steel bars 5 on the bottom of the second section 4 one by one and are fixed through mechanical connection 21, epoxy resin glue is laid on the top of the heightened section 17, the temporary jacks 18 are removed, the second section 4 is lowered, the shear keys 11 arranged on the top of the heightened section 17 correspond to the shear key grooves 13 arranged on the bottom of the second section one by one, the second section 4 is installed and fixed with the heightened section 17 through glue squeezing, and redundant glue is squeezed out through the glue squeezing grooves 10, so that the fixed connection between the second section 4 and the heightened section 17 is realized.
By adopting the structure and the construction method, the connection of the steel bars among the segments is reliable, the quality is easy to control, and the joints on the same section can be staggered. The lower parts of the pier reinforcing steel bars extend into the base, the upper parts of the pier reinforcing steel bars are reinforced by the anchoring plates, the connection and anchoring of the reinforcing steel bars are reliable, and the connection performance among all sections of the prefabricated spliced pier is ensured; meanwhile, the common steel bars provide a definite and reliable energy consumption effect for the spliced pier, the defects that the hysteretic curve of the prestressed spliced pier is not full and the energy consumption is insufficient are overcome, the scheme can be suitable for high-earthquake areas, and a solution is provided for applying the prefabricated spliced pier to the high-earthquake areas.
In order to reduce the weight of the large-size solid section, the sections can be made of lightweight concrete, so that the weight of the sections is reduced on the premise of meeting the requirements of strength and rigidity of the section assembled pier, and the transportation and the hoisting are convenient.
The reinforcing bar adopts the form of pre-buried bellows pore, and the construction tolerance is big, the required precision is low, and the on-the-spot reinforcing bar penetrates conveniently, and the cross-section adopts major diameter, big interval reinforcing bar, reduces reinforcing bar radical and connects the number under satisfying the structural force-carrying capacity condition, makes things convenient for the on-the-spot construction.
The cross section of the pier body is provided with the glue extruding grooves, the construction is carried out by adopting a bin-by-bin mortar sitting method, the compactness and the construction quality of a joint surface are favorably ensured, the connection problem between the sections of large-size piers is effectively solved, when two glue extruding grooves are arranged, the cross section of the pier is divided into three areas, when the mortar sitting construction is adopted, glue is ensured to be uniformly discharged from each area along four directions, and the quality and the compactness of a joint cementing material are ensured; if do not set up crowded groove of gluing, then easily lead to sitting pulp face hollowing, not closely knit scheduling problem to large tracts of land section concatenation, influence joint face quality.
The circular truncated cone type shear keys are arranged among the sections, the shear areas of the shear keys in all directions are equal, the provided shear resistance is equivalent, and the shear resistance requirements in earthquake action in different directions are met; the shear key is in the shape of a circular truncated cone, so that local concentrated stress borne by the shear key is reduced, the bending moment borne by the shear key is reduced due to the arc surface shape, the shear key is ensured to be mainly shear-resistant, and the shear key is prevented from losing resistance due to bending failure too early.
In the process of assembling the segments, the three-dimensional space positions of the segments are accurately adjusted by arranging the temporary jacks, when the segments are supported on the temporary jacks, the elevation and the plane positions of the segments are timely adjusted by pre-assembling, the temporary jacks are supported on the bottom surfaces of the segments, the external space is not occupied, embedded parts do not need to be arranged on the segments, the segment is convenient to install and disassemble, and the segment is accurately assembled.
A small number of prestressed tendons can be arranged in the segments as required, the joints are guaranteed not to crack under common working conditions through the prestress provided by the prestressed tendons, the durability of the joints is improved, meanwhile, the prestressed tendons can adopt unbonded prestress to provide self-resetting capability for the bridge pier, when the bridge pier swings under the action of an earthquake, the restoring force provided by the prestressed tendons can enable the bridge pier to restore to the initial position, so that residual displacement is reduced, the repairing after the earthquake of the assembled pier is facilitated, and the situation that the bridge pier has to be dismantled and rebuilt due to incapability of repairing even though the bridge pier does not collapse is avoided.
Claims (10)
1. The utility model provides a connection structure that is used for prefabricated pin-connected panel pier of festival section to make up has pier stud and base, and the pier stud is located the base top, with base fixed connection, its characterized in that: the pier column is composed of a first section and a second section, the bottom of the first section is connected with the base, the top of the first section is connected with the bottom of the second section, pipelines are respectively embedded in the first section and the second section, glue squeezing grooves are respectively arranged at the bottoms of the first section and the second section, a shear key is preset at the top of the first section, a grouting pipe is preset on the side wall of the lower part of the first section, a shear key groove is arranged at the bottom of the second section, the shear key groove is matched with the shear key for use, the position of the shear key groove corresponds to a shear key arranged at the top of the first section, and the shape and size of the shear key groove are matched with the shear key; a prestressed tendon is arranged in one part of the pipeline, one end of the prestressed tendon is tensioned from the top end of the second segment of the embedded pipeline, and the other end of the prestressed tendon penetrates out of the bottom of the first segment of the embedded pipeline and is anchored with the base; and continuous connecting steel bars are arranged in the other part of pipeline, the connecting steel bars are fixedly connected through mechanical connection, one ends of the connecting steel bars are positioned at the top of the second section and fixedly connected with the top of the second section, and the other ends of the connecting steel bars penetrate out of the bottom of the first section and are fixedly connected with joint steel bars arranged at the top of the base.
2. The connection structure for the segment prefabricated assembly type pier combination according to claim 1, wherein: and one part of pipelines pre-embedded in the first section and the second section are corrugated pipe channels, the other part of pipelines are steel pipes, connecting steel bars penetrate through the corrugated pipe channels, prestress bundles penetrate through the steel pipes, and grouting materials are poured into the corrugated pipe channels.
3. A connection structure for a segment precast pier composite as claimed in claim 1 or 2, wherein: the corrugated pipe hole pre-buried in first subsection and the second subsection corresponds to steel pipe position one-to-one respectively, the corrugated pipe hole pre-buried in the first subsection corresponds to the joint reinforcing steel bar position one-to-one that the base top was equipped with, the corrugated pipe hole at second subsection top is worn out to the fixed connecting reinforcement one end of mechanical connection, through the cooperation of reinforcing bar anchor bolt and reinforcing bar anchor backing plate and the top fixed connection of second subsection, the other end of connecting reinforcement passes the corrugated pipe hole bottom in the first subsection and is equipped with joint reinforcing steel bar mechanical connection with the base top, the diameter ratio of corrugated pipe hole is 2-5cm bigger than the diameter of connecting reinforcement.
4. A connection structure for a segment precast pier combination according to claim 3, wherein: the steel pipes are embedded in the base, the positions of the steel pipes embedded in the base and the positions of the steel pipes embedded in the first section are in one-to-one correspondence respectively, the other end of the prestressed tendon penetrates through the steel pipes embedded in the first section and the steel pipes embedded in the base, the end portion of each steel pipe embedded in the base is anchored, a prestressed grouting pipe is arranged on the base, and the prestressed grouting pipe is communicated with the steel pipes embedded in the base.
5. A connection structure for a segment precast pier composite as claimed in claim 1 or 3, wherein: the base is a cast-in-place base, and the length of the joint reinforcing steel bars arranged at the top of the base is different.
6. The connection structure for the segment prefabricated assembly type pier combination according to claim 1, wherein: the shear key is in a circular truncated cone shape, the vertical section of the shear key is in an isosceles trapezoid shape, the included angle between the inclined edge and the bottom edge of the trapezoid is 45 degrees, and the shear key is meshed with the shear key groove.
7. The connection structure for the segment prefabricated assembly type pier combination according to claim 1, wherein: the glue extruding grooves are respectively positioned at the bottoms of the first section and the second section and divide the first section and the second section into a plurality of areas, the cross section of each glue extruding groove in the horizontal direction is square or rectangular, and the side length is 2-10 cm.
8. The connection structure for the segment prefabricated assembly type pier combination according to claim 1, wherein: the corrugated pipe type steel pipe joint is characterized in that a heightening section is arranged between the first section and the second section, the positions of a corrugated pipe hole and a steel pipe in the heightening section are respectively in one-to-one correspondence with the positions of the corrugated pipe hole and the steel pipe in the first section and the second section, the bottom structure of the heightening section is the same as the bottom structure of the second section, and the top structure of the heightening section is the same as the top structure of the first section.
9. The construction method of the connection structure for the segment precast split pier combination according to claim 1, wherein: comprises the following steps
Firstly, casting a base on site, wherein a first section and a second section are prefabricated in a factory;
hoisting the first section, penetrating a connecting steel bar into a pipeline pre-buried in the first section, and temporarily fixing the connecting steel bar on the top of the first section; supporting the first segment on a temporary jack, and adjusting the spatial position of the segment by the temporary jack; then removing the temporary fixation of the connecting steel bars, lowering the connecting steel bars to the joint positions, mechanically connecting and fixing the connecting steel bars and the joint steel bars in a one-to-one correspondence manner, roughening the top surface area of the base, laying a mortar cushion layer, removing the temporary jack, lowering the first section for mounting by a mortar sitting method, and extruding redundant slurry through a glue extruding groove to realize the connection between the first section and the base;
hoisting a second section, moving the temporary jack to the top surface of the first section, hoisting the second section, penetrating a connecting steel bar into a pipeline pre-buried in the second section, and temporarily fixing the connecting steel bar on the top of the second section; supporting the second section on a temporary jack, and adjusting the spatial position of the second section through the temporary jack; the temporary fixation of the connecting steel bars on the top of the second section is released, the connecting steel bars are lowered to the position connected with the top of the first section, the heads of the connecting steel bars on the top of the first section are mechanically connected and fixed with the connecting steel bars on the bottom of the second section in a one-to-one correspondence mode, epoxy resin glue is laid on the top of the first section, a temporary jack is removed, the second section is lowered, shear keys arranged on the top of the first section are in one-to-one correspondence with shear key grooves arranged on the bottom of the second section, the second section is installed and fixed with the first section through a glue squeezing method, and redundant glue is squeezed out through a glue squeezing groove, so that the fixed connection between the second section and the first section is realized;
step four, cleaning the slurry of the glue extruding groove after the sections are assembled, and filling joints after the cleaning is finished;
fifthly, grouting the grouting material into the pipeline where each connecting steel bar is located through the grouting pipe, and anchoring the connecting steel bars in the prefabricated sections;
step six, fixing one end of the connecting steel bar at the top of the second section;
step seven, when the prestressed tendons are arranged, penetrating the prestressed tendons into the pre-buried pipeline from the top of the second segment, when the prestressed tendons penetrate into the base, performing anchoring connection on the prestressed tendons and the base through an anchoring structure, tensioning the prestressed tendons one by one from the top of the second segment, and when bonding prestress is adopted, pouring prestressed grouting materials into the pre-buried pipeline through which the prestressed tendons penetrate;
and step eight, after the maintenance of all the slurry is finished, removing the grouting pipeline outside the structure, and finishing the construction.
10. The construction method of a connection structure for a segment precast pier combination according to claim 9, wherein: when a plurality of segments are used, a higher segment is added between the first segment and the second segment, a step b is added between the second step and the third step,
b, hoisting the heightened section, moving a temporary jack to the top surface of the first section, hoisting the heightened section, penetrating a connecting steel bar into a pipeline pre-embedded in the heightened section, and temporarily fixing the heightened section on the top of the heightened section; supporting the heightened sections on a temporary jack, and adjusting the spatial positions of the heightened sections through the temporary jack; the temporary fixation of the connecting steel bars on the top of the heightened section is released, the connecting steel bars are lowered to the position connected with the top of the first section, the head of the connecting steel bars on the top of the first section and the connecting steel bars on the bottom of the heightened section are mechanically connected and fixed in a one-to-one correspondence mode, epoxy resin glue is laid on the top of the first section, a temporary jack is removed, the heightened section is lowered, shear keys arranged on the top of the first section and shear key grooves arranged on the bottom of the heightened section are in one-to-one correspondence mode, the heightened section is installed and fixed with the first section through a glue squeezing method, and redundant glue is squeezed out through a glue squeezing groove, so that the fixed connection between the heightened section and the;
the third step is that: hoisting the second section, moving the temporary jack to the top surface of the heightened section, hoisting the second section, penetrating the connecting steel bar into the pipeline pre-buried in the second section, and temporarily fixing the connecting steel bar on the top of the second section; supporting the second section on a temporary jack, and adjusting the spatial position of the second section through the temporary jack; the temporary fixation of the connecting steel bars at the top of the second section is released, the connecting steel bars are placed to the position where the top of the heightened section is connected, the head of the connecting steel bars at the top of the heightened section is mechanically connected and fixed with the connecting steel bars at the bottom of the second section in a one-to-one correspondence mode, epoxy resin glue is laid at the top of the heightened section, the temporary jack is removed, the second section is placed, the shear keys arranged at the top of the heightened section are in one-to-one correspondence with the shear key grooves arranged at the bottom of the second section, the second section is installed and fixed with the heightened section through a glue squeezing method, and redundant glue is squeezed out through a glue squeezing groove, so that the fixed connection between the second section and.
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| CN202010030383.2A CN111877140A (en) | 2020-01-10 | 2020-01-10 | Connecting structure for segment prefabricated assembled pier combination and construction method |
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| CN202010030383.2A CN111877140A (en) | 2020-01-10 | 2020-01-10 | Connecting structure for segment prefabricated assembled pier combination and construction method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541252A (en) * | 2022-04-07 | 2022-05-27 | 安徽省交通规划设计研究总院股份有限公司 | Segment prestress assembled pier with core column and construction method |
| CN115125867A (en) * | 2022-08-10 | 2022-09-30 | 北京城建设计发展集团股份有限公司 | Method for connecting prefabricated T-shaped piers through unbonded prestressed tendons and steel bars |
| CN115125866A (en) * | 2022-08-10 | 2022-09-30 | 北京城建设计发展集团股份有限公司 | Method for connecting prefabricated vase piers through unbonded prestressed tendons and steel bars |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040046673A (en) * | 2002-11-28 | 2004-06-05 | 동양종합건업 주식회사 | Precast Tall Pier for Bridge and Constructing Method therefor |
| CN103374881A (en) * | 2012-04-24 | 2013-10-30 | 上海市政工程设计研究总院（集团）有限公司 | Prefabricated segment assembling pier structure system and construction method thereof |
| CN105821978A (en) * | 2016-03-24 | 2016-08-03 | 天津住宅集团建设工程总承包有限公司 | Semi-bedding and semi-grouting vertical connection construction method of prefabricated wall plate |
| CN107268424A (en) * | 2017-07-06 | 2017-10-20 | 东南大学 | Can fast leveling precast assembly bridge pier structure and its construction method |
| CN107299588A (en) * | 2017-06-30 | 2017-10-27 | 东北大学 | Prefabricated concrete-filled steel tube and spiced by steel reinforced concrete bridge pier |
| CN108560423A (en) * | 2018-02-05 | 2018-09-21 | 四川动和工程咨询有限公司 | A kind of construction method of regular reinforcement and finish rolling deformed bar hybrid reinforcement assembly pier |
| CN108589514A (en) * | 2018-05-06 | 2018-09-28 | 北京工业大学 | Load-bearing and earth-quake resistant mechanism separate type precast assembly bridge pier system |
| CN110468694A (en) * | 2019-09-06 | 2019-11-19 | 郑州大学 | Spigot-and-socket Self-resetting multi-segmental precast pier and its assembly method |
| CN212103638U (en) * | 2020-01-10 | 2020-12-08 | 中国国家铁路集团有限公司 | A connection structure that is used for prefabricated pin-connected panel pier combination of segment |
-
2020
- 2020-01-10 CN CN202010030383.2A patent/CN111877140A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040046673A (en) * | 2002-11-28 | 2004-06-05 | 동양종합건업 주식회사 | Precast Tall Pier for Bridge and Constructing Method therefor |
| CN103374881A (en) * | 2012-04-24 | 2013-10-30 | 上海市政工程设计研究总院（集团）有限公司 | Prefabricated segment assembling pier structure system and construction method thereof |
| CN105821978A (en) * | 2016-03-24 | 2016-08-03 | 天津住宅集团建设工程总承包有限公司 | Semi-bedding and semi-grouting vertical connection construction method of prefabricated wall plate |
| CN107299588A (en) * | 2017-06-30 | 2017-10-27 | 东北大学 | Prefabricated concrete-filled steel tube and spiced by steel reinforced concrete bridge pier |
| CN107268424A (en) * | 2017-07-06 | 2017-10-20 | 东南大学 | Can fast leveling precast assembly bridge pier structure and its construction method |
| CN108560423A (en) * | 2018-02-05 | 2018-09-21 | 四川动和工程咨询有限公司 | A kind of construction method of regular reinforcement and finish rolling deformed bar hybrid reinforcement assembly pier |
| CN108589514A (en) * | 2018-05-06 | 2018-09-28 | 北京工业大学 | Load-bearing and earth-quake resistant mechanism separate type precast assembly bridge pier system |
| CN110468694A (en) * | 2019-09-06 | 2019-11-19 | 郑州大学 | Spigot-and-socket Self-resetting multi-segmental precast pier and its assembly method |
| CN212103638U (en) * | 2020-01-10 | 2020-12-08 | 中国国家铁路集团有限公司 | A connection structure that is used for prefabricated pin-connected panel pier combination of segment |
Non-Patent Citations (1)
| Title |
|---|
| 郭正兴等: "《装配整体式混凝土结构研究与应用》", 30 June 2018 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541252A (en) * | 2022-04-07 | 2022-05-27 | 安徽省交通规划设计研究总院股份有限公司 | Segment prestress assembled pier with core column and construction method |
| CN115125867A (en) * | 2022-08-10 | 2022-09-30 | 北京城建设计发展集团股份有限公司 | Method for connecting prefabricated T-shaped piers through unbonded prestressed tendons and steel bars |
| CN115125866A (en) * | 2022-08-10 | 2022-09-30 | 北京城建设计发展集团股份有限公司 | Method for connecting prefabricated vase piers through unbonded prestressed tendons and steel bars |
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