CN112942076A - Ice load suppressing device for cold region wading pier - Google Patents
Ice load suppressing device for cold region wading pier Download PDFInfo
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- CN112942076A CN112942076A CN202110416987.5A CN202110416987A CN112942076A CN 112942076 A CN112942076 A CN 112942076A CN 202110416987 A CN202110416987 A CN 202110416987A CN 112942076 A CN112942076 A CN 112942076A
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- 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
- E01D19/00—Structural or constructional details of 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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/0232—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means with at least one gas spring
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/30—Wind power
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides an ice load suppressing device for a cold-region wading pier, and belongs to the technical field of pier ice resistance. For the cold-region wading pier, an air bag device capable of generating large deformation is arranged around the pier so as to greatly reduce the unbalanced extrusion load of static ice and the impact load of dynamic ice, thereby effectively ensuring the safety, stability and durability of the structure. Compare in the anti ice device of current pier, this device advantage includes: the allowable deformation capacity is high, and the static ice squeezing load and the flow ice impact load are greatly reduced; the water level can automatically float up and down according to the change of the water level, and the volume of the soaked water can be adjusted by counterweight, so that the flexibility is high; the air bag can automatically adjust the internal air pressure through the air valve, so that the allowable deformation volume of the air bag can be adjusted, and the safety of the air bag can be ensured; simple structure, light weight, convenient assembly and disassembly, economy, high efficiency, reliability and practicability. The device can be almost used for ice-resistant load shedding of any wading buildings in cold regions, such as ocean platforms, offshore wind turbines, even ships and the like, and has wide application.
Description
Technical Field
The invention relates to an anti-ice device for a pier, in particular to a device which can greatly reduce static ice and dynamic ice loads and improve the safety of a wading pier in a cold freezing area.
Background
Millions of bridges are built at home and abroad, and the bridge piers, bridge towers and even some anchors of many bridges are built in rivers, lakes, reservoirs and seas. The substructure of a wading bridge in a cold freezing area (taking a bridge pier as an example) is often subjected to the huge effects of static ice and dynamic ice loads, and the safety of the bridge can be threatened. The ice load of the pier mainly comprises two types of extrusion static load generated by static or slowly displaced ice and dynamic load generated by flowing ice. In the freezing period, the water surface is iced, the thickness, the area and the volume of ice around the bridge pier are increased, and the ice layer may apply strong unbalanced static squeezing thrust to the rigid bridge pier under the restriction of the boundary of a water area, the restriction of an adjacent bridge pier or the influence of water level lifting, so that the bridge pier is excessively deformed or even damaged and collapsed, and related bridge accidents occur; during the ice melting period, the river and ocean large-block flowing ice can cause huge impact force to the bridge piers, and repeated flowing ice impacts to form dynamic ice loads to cause damage and even destruction of the bridge piers, which is also a common accident. Bridge ice load causes huge economic loss and serious social adverse effect. Therefore, it is necessary to take necessary economic, practical, safe and reliable protection measures for the cold-region wading bridge pier to prevent the bridge pier from being subjected to the excessive ice load so as to ensure the safety, stability and durability of the bridge structure.
The current protective measures can be mainly divided into three categories of ice breaking, ice melting and ice resistance. The danger of manual ice breaking is high, the flexibility is poor, the structure of a mechanical ice breaking device is complex, the equipment cost is high, the structure of a deicing device is also complex, and a large amount of energy is consumed. Therefore, most bridges employ ice-resistant protection. However, some existing anti-ice protection devices suffer from the following drawbacks to varying degrees: (1) the static ice unbalanced pushing load and the flowing ice dynamic impact load cannot be simultaneously and well reduced; (2) the static ice load resisting device has low self-adaptive capacity, small deformation capacity and small static ice load amplitude reduction; (3) partial devices are frozen due to lack of tightness, so that the load shedding effect is influenced; (4) the device is complicated in construction and is difficult to satisfy the requirements of convenience and economy. Therefore, research on an anti-icing protection device for a bridge pier, which has a wide application range, high flexibility, strong practicability and good economical efficiency, is urgently needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a reliable, practical, convenient and economic pier anti-ice protection device which has large deformation and self-adaptive capacity and can greatly reduce static ice load and dynamic ice load aiming at the engineering requirement of ice resistance of pier in cold regions.
The technical scheme of the invention is as follows:
an ice load suppressing device for a cold-region wading pier comprises an air bag 2 wrapped on the pier 1, a weight piece 3 used for adjusting the elevation, the immersion depth and the volume of the air bag 2, and a rope 4 used for suspending the weight piece 3 below the air bag 2. The top of the air bag 2 is provided with a plurality of control air valves 201 for inflating, pressurizing or exhausting and decompressing; before freezing, the closed-loop air bag is wrapped at the designated elevation position of the pier 1 by movably connecting the end parts of the air bag 2 into a whole, and then the air bag 2 is inflated to the designed air pressure; the weight 3 is hung on a lifting lug 203 at the bottom of the air bag 2 through a rope 4, and the depth and the volume of the air bag 2 immersed in water can be adjusted through the weight 3 with different weights; so that the ice bodies or the running ice 5 can be prevented from being in direct contact with the pier 1. When evenly icing around pier 1, gasbag 2 receives the extrusion of quiet ice load, because gasbag 2 is the flexible device, consequently can produce partial deformation, relative ice body direct action pier, can play certain uninstallation effect. Generally, the lower the temperature, the longer the ice season, the thicker the ice layer and the larger the ice body, the larger the deformation and pressure of the air bag 2, and the larger the radial pressure applied to the pier 1, but the symmetric pressure does not threaten the reinforced concrete or steel pipe concrete pier, and even if the air bag device 2 is not provided, the pier is irrelevant; in some cases, a huge static ice body may partially displace towards a certain direction due to some reasons, at this time, the fixed pier 1 is inevitably subjected to unbalanced static ice extrusion force, the air bag 2 can generate asymmetric extrusion deformation, and the ice body is allowed to partially displace, so that the ice load effect can be greatly reduced (the amplitude of reduction can reach 80% or even more, and is related to the parameters of the air bag 2 and the displacement of the ice body 5); when the air pressure in the air bag 2 reaches a design threshold value, the control air valve 201 can be automatically opened, and the control air valve is automatically closed after the released air reaches the rated air pressure, so that the pier 1 is always controlled not to be subjected to overlarge unbalanced extrusion thrust, and not to burst and fail due to the fact that the pressure bearing capacity of the air bag 2 is reached; due to the large-volume air bag 2, enough displacement space is reserved for the ice body 5 which can be displaced, so that the ice load suppression effect is realized. To the ice impact that flows, gasbag 2 can increase the striking effect time of the ice body 5 on the one hand, play the cushioning protection effect, and on the other hand also can increase the lifting surface area of pier 1 to reduce the impact by a wide margin, can also avoid the wearing and tearing of the pier 1 of ice 5 pair that flows, guarantee the security and the durability of bridge. The air bag 2 capable of floating up and down can also resist ice flow impact under different water level conditions in a self-adaptive mode.
The shape and size of the cross section of the pier 1 are not limited.
The movable connection mode of the end part of the air bag 2 is embedded buckle connection, bolt connection and buckle hinge connection; the inflated airbag 2 completely encloses the articulation point, insulating it from water and protecting it from crushing and impacts.
The shape and size of the air bag 2 are determined by various factors such as the section shape and size of the pier 1, the compression deformation amount of the air bag, the thickness of an ice layer, the possible impact load of ice blocks and the like. The height of the air bag 2 is designed according to the icing thickness of the water area where the air bag is located, so that the basic condition that the ice body and the flowing ice 5 can not touch the pier 1 all the time is ensured.
The air bag 2 is made of flexible materials and has certain rigidity, strength, hardness, abrasion resistance and weather resistance after being inflated. The rigidity should not be too large, otherwise the load shedding effect will be obviously reduced.
The control valve 201 can be used for inflation and constant pressure exhaust, belongs to a semi-automatic mechanical device, can be designed by referring to relevant data, and the specific structure is out of the scope of the invention.
The embedded buckle 202 has sufficient strength and rigidity, and is not limited to the buckle form, but may also be in the form of bolt connection, snap hinge, etc. The inflated airbag 2 may completely enclose the embedded insert 202, isolating it from the water source and protecting it from crushing and impacts.
The lifting lug 203 can be made of a galvanized steel ring, and the air bag 2 at the position where the lifting lug 203 is arranged is thickened to ensure reasonable stress.
The number and weight of the weight members 3 are mainly determined by the designed immersion depth and volume of the airbag 2. The weight 3 can be sand bag, stone bag or concrete block, etc. with better economy, but it is not limited to these materials. The weight members 3 should be arranged symmetrically in equal weight to ensure the stability of the air bag.
The rope 4 has enough strength, specific materials and forms are not limited, and the conditions of economy, durability, safety, reliability and the like are met as much as possible.
The device is installed before freezing in winter, can be placed for a long time after installation, also can be dismantled after the ice season, and its installation flow is: (1) an airbag 2 with designed related parameters and without inflation is wrapped around a pier 1 near the water surface by an embedded buckle 202; (2) inflating the air bag 2 to a designed pressure value; (3) the weight 3 is hung on the lifting lug 203 through the rope 4, and the air bag 2 sinks under the tension of the weight until the balance is static. The ice stage can adaptively resist and reduce static ice extrusion and flowing ice impact load, and the safety, stability and durability of the bridge are ensured.
The invention has the beneficial effects that: (1) the allowable deformation capacity is high, and the floating ice static squeezing thrust and the flowing ice dynamic impact load borne by the bridge pier can be greatly reduced; (2) the adaptability is strong, and the flexibility is high. The control air valve automatically adjusts the internal air pressure and can adjust the volume of the air bag to a certain degree. In the vertical direction, the air bag can automatically float up and down according to the water level change; (3) the structure is simple, the device is light, and the assembly and disassembly are simple and convenient; (4) economical, efficient, reliable and practical.
Drawings
Fig. 1 is a front view of an ice load suppressing device for a pier involved in water in a cold region.
Fig. 2 is a schematic view of an installation process of an ice load suppressing device for a pier in a cold region.
Fig. 3 is a sectional view of an ice load suppressing device for a pier involved in water in a cold region.
In the figure: 1, bridge piers; 2, an air bag; 201 control air valve; 202 embedding a buckle; 203, lifting lugs; 3 a weight member; 4, steel wire ropes; 5 ice bodies or running ice.
Detailed Description
The following detailed description of the embodiments of the invention is provided in connection with the accompanying drawings.
As shown in fig. 1 to 3, the ice load suppressing device for the pier in cold regions involved in water comprises an air bag 2 wrapped on the pier 1, a weight 3 for adjusting the elevation, the immersion depth and the volume of the air bag 2, and a rope 4 for suspending the weight 3 below the air bag 2. The air bag 2 comprises a plurality of control air valves 201, an embedded buckle 202 and a plurality of lifting lugs 203. The device is installed before freezing in winter, can be placed for a long time after installation, also can demolish after ice season, and its installation flow is: the designed uninflated air bag 2 is wrapped around the pier 1 near the water surface by the embedded buckle 202, the weight part 3 is hung on the lifting lug 203 through the rope 4 after the air bag is inflated to the designed air pressure value, and the air bag 2 sinks to the static balance position to complete the installation. When the pier 1 is subjected to static ice unbalanced extrusion thrust, the air bag 2 can generate asymmetric extrusion deformation to allow the ice body to partially displace, so that the ice load effect can be greatly reduced; when the air pressure in the air bag 2 reaches a design threshold value, the control air valve 201 is automatically opened, and the released air is automatically closed after reaching a rated air pressure, so that the pier 1 is always controlled not to be subjected to overlarge unbalanced extrusion force, and not to burst and fail due to the fact that the pressure bearing capacity of the air bag 2 is reached; due to the large-volume air bag 2, enough displacement space is reserved for the ice body 5 which can be displaced, so that the ice load suppression effect is realized. To the ice impact that flows, gasbag 2 can increase the striking effect time of the ice body 5 on the one hand, play the cushioning protection effect, on the other hand also can increase the lifting surface area of pier 1 to reduce the impact by a wide margin, can also avoid the wearing and tearing of pier 1 of ice 5 pair that flows. The air bag 2 capable of floating up and down can also resist ice flow impact under different water level conditions in a self-adaptive mode.
The whole set of device has strong practicability, high flexibility, simple structure, reliability, convenience, economy and high efficiency, and ensures the safety, stability and durability of the bridge.
The device is not limited to bridge pier ice resistance, can be almost used for ice resistance and load shedding of any wading buildings and structures in cold regions, such as ocean platforms, offshore wind turbines, even ships and the like, and therefore has very wide application.
The foregoing is merely exemplary of the preferred embodiments of the present invention and is not intended to limit the invention in any manner. Any equivalent alterations, modifications or improvements, etc. made to the above examples by those skilled in the art using the teachings of the present invention, are still within the scope of the present invention.
Claims (10)
1. The ice load suppressing device for the cold-region wading pier is characterized by comprising an air bag (2) wrapped on the pier (1), a counterweight (3) used for adjusting the elevation, the immersion depth and the volume of the air bag (2), and a rope (4) for suspending the counterweight (3) below the air bag (2); the top of the air bag (2) is provided with a plurality of control air valves (201) for inflating, pressurizing or exhausting and decompressing; before freezing, the end parts of the air bags (2) are movably connected into a whole, so that the closed-loop air bags (2) are wrapped at the designated elevation position of the pier (1), and then the air bags (2) are inflated to the designed air pressure; the weight piece (3) is hung on a lifting lug (203) at the bottom of the air bag (2) through a rope (4), and the depth and the volume of the air bag (2) immersed in water are adjusted through the weight pieces (3) with different masses, so that ice or running ice (5) is prevented from directly contacting the pier (1); when the pier (1) is subjected to static ice unbalanced squeezing force, the air bag (2) generates asymmetric squeezing deformation to allow partial displacement of the ice body or the flowing ice (5), so that the ice load effect is reduced; when the air pressure in the air bag (2) reaches a design threshold value, the control air valve (201) is automatically opened, and the released air is automatically closed after reaching a rated air pressure, so that the pier (1) is always controlled not to be subjected to overlarge unbalanced extrusion force, and not to burst and fail due to the fact that the pressure bearing capacity of the air bag (2) is reached; due to the existence of the air bag (2), enough displacement space is reserved for the ice body or the flowing ice (5) which can be displaced, so that ice load is suppressed.
2. The ice load suppressing device for pier in cold region by wading according to claim 1, wherein the air cell (2) is made of flexible material, and the shape and size of the air cell is determined by the factors of the shape and size of the cross section of the pier (1), the compression deformation of the air cell, the thickness of the ice layer, and the possible impact load of the ice block; the height of the air bag (2) is designed according to the icing thickness of the water area where the air bag is located, so that the basic condition that the ice body or the flowing ice (5) can not touch the pier (1) all the time is ensured.
3. The device for suppressing ice load on pier in cold region like water according to claim 1 or 2, wherein the control air valve (201) is a semi-automatic mechanical device for inflation and constant pressure exhaust.
4. The ice load suppressing device for the pier in the cold region involved in water according to claim 1 or 2, wherein the movable connection mode of the end part of the air bag (2) is embedded buckle connection, bolt connection, buckle hinge connection; the inflated airbag (2) completely covers the movable connection point, so that the movable connection point is isolated from water sources and is prevented from being extruded and impacted.
5. The ice load suppressing device for the pier in cold regions with wading into water according to claim 3, wherein the movable connection mode of the end part of the air bag (2) is embedded buckle connection, bolt connection, buckle hinge connection; the inflated airbag (2) completely covers the movable connection point, so that the movable connection point is isolated from water sources and is prevented from being extruded and impacted.
6. The device for suppressing ice load of pier in cold region involved in water according to claim 1, 2 or 5, wherein the lifting lug (203) is made of galvanized steel ring, and the air bag (2) at the position where the lifting lug (203) is arranged is thickened.
7. The ice load suppressing device for the cold-region wading pier according to claim 3, wherein the lifting lugs (203) are made of galvanized steel rings, and the air bags (2) arranged at the lifting lugs (203) are thickened.
8. The ice load suppressing device for the pier in the cold region as claimed in claim 4, wherein the lifting lugs (203) are made of galvanized steel rings, and the air bags (2) arranged at the lifting lugs (203) are thickened.
9. The cold region wading pier ice load suppressing device according to claim 1, 2, 5, 7 or 8, wherein the number and weight of the weight members (3) are mainly determined by the designed immersion depth and volume of the air bag (2); the counterweight (3) is a sand bag, a stone bag or a concrete block; the balance weights (3) are symmetrically arranged in an equal-weight mode, so that the stability of the air bag is guaranteed.
10. The cold region wading pier ice load suppressing device as claimed in claim 6, wherein the number and weight of the weight members (3) are mainly determined by the designed immersion depth and volume of the air bag (2); the counterweight (3) is a sand bag, a stone bag or a concrete block; the balance weights (3) are symmetrically arranged in an equal-weight mode, so that the stability of the air bag is guaranteed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110416987.5A CN112942076A (en) | 2021-04-19 | 2021-04-19 | Ice load suppressing device for cold region wading pier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110416987.5A CN112942076A (en) | 2021-04-19 | 2021-04-19 | Ice load suppressing device for cold region wading pier |
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| CN112942076A true CN112942076A (en) | 2021-06-11 |
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| CN202110416987.5A Pending CN112942076A (en) | 2021-04-19 | 2021-04-19 | Ice load suppressing device for cold region wading pier |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113463501A (en) * | 2021-07-20 | 2021-10-01 | 郜海根 | Building pier protective frame based on triangle-shaped location structure |
| CN113565067A (en) * | 2021-07-02 | 2021-10-29 | 湖北省电力勘测设计院有限公司 | Complementary photovoltaic prestressing force tubular pile anticollision protection device that prevents frostbite of fishing light |
| CN114775411A (en) * | 2022-04-25 | 2022-07-22 | 大连理工大学 | Anti-ice protection safety alarm device for pier in cold area water area and installation method |
| CN114777972A (en) * | 2022-04-25 | 2022-07-22 | 大连理工大学 | Cold region water area static ice pressure measuring device and installation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114777972B (en) * | 2022-04-25 | 2024-05-28 | 大连理工大学 | Device for measuring static ice pressure in cold region water area and mounting method |
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Application publication date: 20210611 |