CN111962384A - Anti-seismic pier with built-in energy dissipation device and construction method thereof - Google Patents
Anti-seismic pier with built-in energy dissipation device and construction method thereof Download PDFInfo
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- CN111962384A CN111962384A CN202010766142.4A CN202010766142A CN111962384A CN 111962384 A CN111962384 A CN 111962384A CN 202010766142 A CN202010766142 A CN 202010766142A CN 111962384 A CN111962384 A CN 111962384A
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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
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
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- Bridges Or Land Bridges (AREA)
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Abstract
The invention discloses an anti-seismic pier with built-in energy dissipation devices and a construction method thereof, wherein the anti-seismic pier comprises a pier, pipe piles are arranged in the pier, a plurality of rows of shock-absorbing energy dissipation devices are arranged between the pier and the pipe piles, each row of shock-absorbing energy dissipation devices at least comprises a group of symmetrically arranged shock-absorbing energy dissipation devices, each shock-absorbing energy dissipation device comprises energy dissipation components which are distributed in a crossed mode, two ends of each energy dissipation component are respectively fixed on the inner walls of the pier and the pipe piles, each energy dissipation component comprises a group of symmetrically distributed cylinders and piston rods, pistons are arranged at the end parts of the piston rods, and air holes are. The invention has strong applicability; the shock resistance of the pier can be improved, the built-in damping energy dissipation device and the built-in steel pipe foam concrete pile can play a role in energy dissipation and shock absorption, reduce the displacement of the pier under the earthquake load and improve the shock resistance of the pier; when the earthquake is over, the air holes are removed or enter the air cylinder, so that the air pressure inside and outside the air cylinder is balanced, and no additional constant load is applied to the bridge pier.
Description
Technical Field
The invention relates to an anti-seismic pier and a construction method thereof, in particular to an anti-seismic pier with a built-in energy dissipation device and a construction method thereof.
Background
With the rapid development of socioeconomic performance in China, infrastructure construction is continuously extended to remote mountainous areas. The bridge engineering is built in traffic engineering and has the function of lifting the foot. The bridge construction cost is high, and once the bridge is damaged by an earthquake, huge loss is caused. According to the existing earthquake information, the bridge pier earthquake damage is the most common earthquake damage form in the bridge. The bridge pier is a key stress component of the bridge, and the deformation of the reinforced concrete bridge pier caused by an earthquake can cause the disasters such as bridge pier cracking, bridge falling, inter-beam collision and even bridge pier collapse, and the production and life of people are seriously influenced.
In the current bridge design, bridge earthquake resistance is an important design content and research direction, and the improvement of the earthquake resistance of the bridge is one of key technologies by increasing the shear strength, the plasticity capacity and the energy consumption capacity of a pier. In the existing anti-seismic design, the shear strength of the pier is improved by encrypting the reinforcing steel bars at the position with larger bearing bending moment, but the plasticity of the bridge is also reduced, the energy dissipation of the bridge during earthquake is reduced, and the danger of brittle failure is improved.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide an anti-seismic pier with a built-in energy consumption device and a construction method thereof, which can improve the anti-seismic performance of a bridge through an external device under the condition of not changing the plasticity of the bridge.
The technical scheme is as follows: the energy-consumption-reducing bridge comprises bridge piers, wherein pipe piles are arranged in the bridge piers, a plurality of rows of energy-consumption-reducing devices are arranged between the bridge piers and the pipe piles, each row of energy-consumption-reducing devices at least comprises a group of symmetrically-arranged energy-consumption-reducing devices, each energy-consumption-reducing device comprises energy-consumption components which are distributed in a crossed mode, two ends of each energy-consumption component are respectively fixed on the bridge piers and the inner walls of the pipe piles, each energy-consumption component comprises a group of symmetrically-distributed air cylinders and piston rods, pistons are arranged at the end portions of.
And a row of damping and energy-consuming devices are arranged at the position with the maximum slope of the pier deflection deformation diagram.
The part of the piston rod extending out of the cylinder is sleeved with a spring to assist the cylinder in dissipating energy and prevent the bottom of the piston rod from colliding with the cylinder.
And the two ends of the energy dissipation assembly are provided with hinged supports, and the hinged supports are welded with the pipe pile and connected with the bridge pier through bolts.
The tubular pile comprises a steel pipe pile, foam concrete is poured in the steel pipe pile, the foam concrete can be synchronously poured with concrete of a pier, and the construction period is not influenced.
The center of the steel pipe pile coincides with the center of the pier.
The bottom of the steel pipe pile is poured or welded with the pier foundation, and a rubber pad is arranged between the top of the steel pipe pile and the bridge support, so that the steel pipe pile can move along with the bridge panel, and energy dissipation is generated.
The diameter of the steel pipe pile is 1/3-2/3 of the minimum inner diameter of the pier.
The top of the bridge pier is provided with a bridge support, and the bottom of the bridge pier is fixed on the bridge pier foundation.
A construction method of an anti-seismic pier with a built-in energy dissipation device comprises the following steps:
(1) calculating and determining the minimum size D of the inner diameter of the pier, the pouring height H of each stage of the pier and the diameter D of the steel pipe pile according to engineering requirements and bearing capacity, and determining the size of the damping and energy dissipation device according to the size of a gap between the pier and the steel pipe pile;
(2) when the pier foundation is constructed, inserting the steel pipe pile into the pier foundation and pouring concrete, rigidly connecting the steel pipe pile with the pier foundation, wherein the height of the installed steel pipe pile is the same as that of the hollow pier poured at the first stage;
(3) determining the installation positions of the shock-absorbing and energy-consuming devices, wherein the distance between the upper row of shock-absorbing and energy-consuming devices and the lower row of shock-absorbing and energy-consuming devices is not less than (D-D) and not more than 3(D-D), and the distance between the shock-absorbing and energy-consuming devices positioned at the top or the bottom and the top or the bottom of the pier is not less than (D-D) and not more than 3 (D-D);
(4) constructing pier steel bars, installing a pier template, installing a hinged support on the template through a screw rod, pouring concrete into the template, pouring the hinged support into the concrete, pouring foam concrete into the steel pipe pile, and welding another hinged support at the corresponding position of the steel pipe pile;
(5) after the pier at the stage is demoulded, a damping and energy-consuming device is installed, so that when the pier is at an initial position, the piston is positioned in the middle of the cylinder;
(6) and (3) installing the next-stage steel pipe pile, repeating the steps (1) to (5), installing a rubber pad on the top of the steel pipe pile after the installation of the last-stage pier is completed, and finally pouring the bridge support.
Has the advantages that: the invention has strong applicability, is not only suitable for cylindrical hollow piers, but also suitable for hollow piers with other sections; the shock resistance of the pier can be improved, the built-in damping energy dissipation device and the built-in steel pipe foam concrete pile can play a role in energy dissipation and shock absorption, reduce the displacement of the pier under the earthquake load and improve the shock resistance of the pier; the air holes are removed or enter the air cylinder when the earthquake is finished, so that the air pressure inside and outside the air cylinder is balanced, and extra constant load cannot be applied to the bridge pier.
Drawings
Fig. 1 is a cross-sectional view of a pier of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of the damping and dissipating device of the present invention;
fig. 4 is a schematic view of the energy consuming components of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1 and 2, the bridge pier comprises a hollow pier 2, a bridge support 1 is arranged at the top of the hollow pier 2, a pier foundation 12 is arranged at the bottom of the hollow pier 2, the hollow pier 2 bears all loads transmitted by the bridge support 1 at the upper part, and a plurality of reinforcing steel bars 7 are poured inside the hollow pier 2. And a tubular pile is arranged in the hollow pier 2, is formed by combining a steel pipe pile 3 and cast-in-place foam concrete 4, is arranged in the hollow pier 2 and does not bear upper load, and the center of the steel pipe pile 3 is superposed with the center of the hollow pier 2. The foam concrete 4 is poured into the steel pipe pile 3 after being stirred, can be synchronously poured with the concrete of the hollow pier 2, and cannot influence the construction period. The bottom of the steel pipe pile 3 is fixedly connected with a pier foundation 12, and can be poured or welded; a rubber pad 6 is arranged between the top and the bridge support 1 in a padding mode, so that the steel pipe pile 3 can move along with a bridge panel, and energy dissipation is generated. The diameter of the steel pipe pile 3 is 1/3 to 2/3 of the smallest inner diameter of the hollow pier 2.
And a plurality of rows of damping and energy-consuming devices are arranged in a gap between the hollow pier 2 and the tubular pile, and the size of the selected damping and energy-consuming device 5 is determined according to the size of the gap. Each row of the shock and energy dissipation devices at least comprises a group of symmetrically arranged shock and energy dissipation devices 5, as shown in fig. 3, each shock and energy dissipation device 5 comprises an energy dissipation assembly which is hinged in a crossing manner, two ends of each energy dissipation assembly are respectively fixed on the inner walls of the pier and the steel pipe pile 3, as shown in fig. 4, each energy dissipation assembly comprises a group of symmetrically distributed cylinders 8 and piston rods 11, a piston 13 is arranged at the end part of each piston rod 11, and air holes are distributed in each piston 13. The cylinder 8 is hinged with a hinged support 12, a piston rod 11 is arranged in the cylinder 8 and can slide along the cylinder 8, and the length of the piston rod 11 is suitable for the depth of the cylinder 8 and cannot be too long or too short. The part of the piston rod 11 extending out of the cylinder 8 is sleeved with a high-rigidity spring 9 to assist the cylinder 8 to dissipate energy and prevent the bottom of the piston rod 11 from colliding with the cylinder 8. The two ends of the energy dissipation assembly are hinged with hinged supports 12, the hinged supports 12 are respectively fixed on the inner walls of the steel pipe pile 3 and the hollow pier 2 and can be welded with the steel pipe pile 3, and the hinged supports can be poured in concrete through the through bolts between the steel pipe pile 3 and the hollow pier 2.
A row of damping and energy-consuming devices 5 are arranged at the position with the maximum slope of the flexural deformation diagram of the pier, and the damping and energy-consuming devices 5 at the other positions are arranged according to the distance between the upper row and the lower row which is not less than (D-D) and not more than 3 (D-D); and the distance from the damping and energy dissipating device 5 positioned at the top or the bottom to the top or the bottom of the hollow pier 2 is not less than (D-D) and not more than 3 (D-D).
A certain volume of gas is sealed between the piston 13 and the cylinder 8, a small number of gas holes are distributed on the piston 13, and the gas holes are suitable, so that when the hinged support 10 transmits a dynamic load, the gas cannot be exhausted or enters the cylinder 8, the gas is compressed or stretched, the outside does work on the gas, and the energy is dissipated; when the hinged support 10 transmits large constant load, gas can be slowly discharged or enter the air cylinder 8 through the air holes, and finally the air pressure inside and outside the air cylinder 8 is almost the same, and no additional load is applied like the steel pipe pile 3 or the hollow pier 2.
The anti-seismic working principle of the invention is as follows: when an inertial force generated by an earthquake acts on the pier, the hollow pier 2 and the steel pipe pile 3 deform. Because the steel pipe pile 3 and the hollow pier 2 have different masses and different top construction modes, relative displacement is generated between the steel pipe pile 3 and the hollow pier 2 to cause the piston 13 to relatively slide in the cylinder 8, work is done on gas in the cylinder 8, and energy dissipation is generated; when the earthquake is over, the air is discharged or enters the air cylinder 8 through the air hole, so that the air pressure inside and outside the air cylinder 8 is balanced, and no additional constant load is applied to the bridge pier; in addition, the steel-pipe pile 3 swings, so that the foam concrete 4 in the steel-pipe pile 3 is crushed and moved, and energy dissipation occurs.
A construction method of an anti-seismic pier with a built-in energy dissipation device comprises the following steps:
(1) calculating and determining the minimum size D of the inner diameter of the pier, the pouring height H of each stage of the pier and the diameter D of the steel pipe pile according to engineering requirements and bearing capacity, and determining the size of the damping and energy dissipation device according to the size of a gap between the pier and the steel pipe pile;
(2) when the pier foundation is constructed, inserting the steel pipe pile into the pier foundation and pouring concrete, rigidly connecting the steel pipe pile with the pier foundation, wherein the height of the installed steel pipe pile is the same as that of the hollow pier poured at the first stage;
(3) determining the installation positions of the shock-absorbing and energy-consuming devices, wherein the distance between the upper row of shock-absorbing and energy-consuming devices and the lower row of shock-absorbing and energy-consuming devices is not less than (D-D) and not more than 3(D-D), and the distance between the shock-absorbing and energy-consuming devices positioned at the top or the bottom and the top or the bottom of the pier is not less than (D-D) and not more than 3 (D-D);
(4) constructing pier steel bars, installing a pier template, installing a hinged support on the template through a screw rod, pouring concrete into the template, pouring the hinged support into the concrete, pouring foam concrete into the steel pipe pile, and welding another hinged support at the corresponding position of the steel pipe pile;
(5) after the pier at the stage is demoulded, a damping and energy-consuming device is installed, so that when the pier is at an initial position, the piston is positioned in the middle of the cylinder;
(6) and (3) installing the next-stage steel pipe pile, repeating the steps (1) to (5), installing a rubber pad on the top of the steel pipe pile after the installation of the last-stage pier is completed, and finally pouring the bridge support.
Claims (10)
1. The utility model provides a built-in power consumption device's antidetonation pier, includes pier (2), pier (2) in be equipped with the tubular pile, a serial communication port, pier (2) and tubular pile between be equipped with multirow shock attenuation power consumption device, every row of shock attenuation power consumption device includes shock attenuation power consumption device (5) of a set of symmetric arrangement at least, shock attenuation power consumption device (5) including cross distribution's energy dissipation component, energy dissipation component's both ends are fixed respectively on pier (2) and tubular pile inner wall, energy dissipation component include cylinder (8) and piston rod (11) of a set of symmetric distribution, the tip of piston rod (11) is equipped with piston (13), piston (13) on laid the gas pocket.
2. An earthquake-resistant pier with built-in energy dissipation devices as recited in claim 1, wherein a row of energy dissipation devices (5) is installed at the position where the slope of the flexural deformation diagram of the pier (2) is maximum.
3. An earthquake-resistant pier with built-in energy dissipation devices as recited in claim 1, wherein the portion of the piston rod (11) extending out of the cylinder (8) is sleeved with a spring (9).
4. An anti-seismic pier with built-in energy dissipation devices according to claim 1, wherein hinged supports (10) are arranged at two ends of the energy dissipation assembly, and the hinged supports (10) are welded with pipe piles and connected with the pier (2) through bolts.
5. An earthquake-resistant pier with a built-in energy dissipation device according to claim 1, wherein the pipe piles comprise steel pipe piles (3), and foam concrete (4) is poured into the steel pipe piles (3).
6. An earthquake-resistant pier with a built-in energy dissipation device according to claim 5, wherein the center of the steel pipe pile (3) coincides with the center of the pier (2).
7. An earthquake-resistant pier with a built-in energy dissipation device as recited in claim 1 or 5, wherein the bottom of the steel pipe pile (3) is poured or welded with a pier foundation (12), and a rubber pad (6) is arranged between the top and the bridge support (1).
8. An earthquake-resistant pier with a built-in energy dissipation device as claimed in claim 7, wherein the diameter of the steel pipe pile (3) is 1/3-2/3 of the minimum inner diameter of the pier (2).
9. An earthquake-resistant pier with a built-in energy dissipation device as recited in claim 1, wherein the top of the pier (2) is provided with a bridge support (1), and the bottom of the pier is fixed on a pier foundation (12).
10. A construction method of an anti-seismic pier with a built-in energy dissipation device is characterized by comprising the following steps:
(1) calculating and determining the minimum size D of the inner diameter of the pier, the pouring height H of each stage of the pier and the diameter D of the steel pipe pile according to engineering requirements and bearing capacity, and determining the size of the damping and energy dissipation device according to the size of a gap between the pier and the steel pipe pile;
(2) when the pier foundation is constructed, inserting the steel pipe pile into the pier foundation and pouring concrete, rigidly connecting the steel pipe pile with the pier foundation, wherein the height of the installed steel pipe pile is the same as that of the hollow pier poured at the first stage;
(3) determining the installation positions of the shock-absorbing and energy-consuming devices, wherein the distance between the upper row of shock-absorbing and energy-consuming devices and the lower row of shock-absorbing and energy-consuming devices is not less than (D-D) and not more than 3(D-D), and the distance between the shock-absorbing and energy-consuming devices positioned at the top or the bottom and the top or the bottom of the pier is not less than (D-D) and not more than 3 (D-D);
(4) constructing pier steel bars, installing a pier template, installing a hinged support on the template through a screw rod, pouring concrete into the template, pouring the hinged support into the concrete, pouring foam concrete into the steel pipe pile, and welding another hinged support at the corresponding position of the steel pipe pile;
(5) after the pier at the stage is demoulded, a damping and energy-consuming device is installed, so that when the pier is at an initial position, the piston is positioned in the middle of the cylinder;
(6) and (3) installing the next-stage steel pipe pile, repeating the steps (1) to (5), installing a rubber pad on the top of the steel pipe pile after the installation of the last-stage pier is completed, and finally pouring the bridge support.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010766142.4A CN111962384A (en) | 2020-08-03 | 2020-08-03 | Anti-seismic pier with built-in energy dissipation device and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010766142.4A CN111962384A (en) | 2020-08-03 | 2020-08-03 | Anti-seismic pier with built-in energy dissipation device and construction method thereof |
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| CN111962384A true CN111962384A (en) | 2020-11-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699875A (en) * | 2021-09-03 | 2021-11-26 | 河海大学 | Super high shock attenuation pier structure of nearly fault railway |
| CN114293460A (en) * | 2022-02-15 | 2022-04-08 | 中南大学 | Railway swinging hollow high pier with damping and energy-consuming devices |
| CN114395977A (en) * | 2022-02-15 | 2022-04-26 | 中南大学 | Replaceable shear-resistant energy dissipation device for hollow swing pier of high-speed railway |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699875A (en) * | 2021-09-03 | 2021-11-26 | 河海大学 | Super high shock attenuation pier structure of nearly fault railway |
| CN114293460A (en) * | 2022-02-15 | 2022-04-08 | 中南大学 | Railway swinging hollow high pier with damping and energy-consuming devices |
| CN114395977A (en) * | 2022-02-15 | 2022-04-26 | 中南大学 | Replaceable shear-resistant energy dissipation device for hollow swing pier of high-speed railway |
| CN114293460B (en) * | 2022-02-15 | 2022-09-20 | 中南大学 | Railway swinging hollow high pier with damping and energy-consuming devices |
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Application publication date: 20201120 |