CN114889755B - Self-floating conveying device and self-floating conveying method for steel pipe arch rib sections - Google Patents
Self-floating conveying device and self-floating conveying method for steel pipe arch rib sections Download PDFInfo
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- CN114889755B CN114889755B CN202210508859.8A CN202210508859A CN114889755B CN 114889755 B CN114889755 B CN 114889755B CN 202210508859 A CN202210508859 A CN 202210508859A CN 114889755 B CN114889755 B CN 114889755B
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- lower chord
- arch rib
- steel pipe
- main pipe
- propeller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Abstract
The invention provides a steel pipe arch rib section self-floating conveying device which comprises a water shutoff air bag, a propeller and a controller; the water blocking air bags are respectively arranged in the end pipes at the two ends of the upper chord main pipe, and can be inflated to seal the pipe orifice of the upper chord main pipe; the water blocking air bags with the same structure are respectively arranged in the end pipes at the two ends of the lower chord main pipe; the tail end of the lower chord main pipe is also provided with a lower chord propeller; the controller is arranged in the steel pipe arch rib section or the traction ship and is at least used for controlling the rotating speed of the lower chord propeller. The self-floating conveying method for the steel pipe arch rib sections is applied to the self-floating conveying device for the steel pipe arch rib sections, water blocking air bags arranged in pipe orifices at two ends of a main pipe are inflated through inflation, two ends of the main pipe are closed by friction force generated between the water blocking air bags and the inner wall of the main pipe, so that the self-floating of the steel pipe arch rib sections in water is realized, and the floating posture of the steel pipe arch rib sections is leveled by means of the upward floating lifting force provided by a lower chord propeller.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a self-floating conveying device and a self-floating conveying method for a steel pipe arch rib section.
Background
The steel pipe concrete arch bridge has its arch rib divided into several arch rib sections longitudinally along the bridge, and the arch rib sections are assembled and formed in the steel structure assembling field, and after being transported to bridge position, the arch rib sections are installed by means of cable crane.
For a concrete filled steel tube bridge crossing a water area, the arch rib segments generally need to be installed on a construction site in a shipping mode due to the limitation of topography and traffic conditions. The single arch rib section weighs two hundred tons, the overall dimension is generally larger, the gravity center is higher during transportation, the requirements on various aspects of ships are higher, and the transportation cost is higher.
Disclosure of Invention
Aiming at the defects in the prior art, the present steel pipe arch rib section provided by the invention is limited by the terrain and traffic conditions, and is inconvenient to transport.
In order to achieve the above object, the present invention is realized by the following technical scheme:
in a first aspect of the present invention, there is provided a steel pipe arch rib section self-floating transport device, which is disposed on a steel pipe arch rib section, the steel pipe arch rib section including two upper chord main pipes disposed side by side at intervals and two lower chord main pipes disposed side by side at intervals; the self-floating conveying device comprises a water shutoff air bag, a propeller and a controller; the water shutoff air bags are respectively arranged in the end pipes at the two ends of the upper chord main pipe, one end, far away from the upper chord main pipe, of each water shutoff air bag is provided with an air valve, and each air valve is communicated with an air pipe so as to facilitate the air inflation into the water shutoff air bag through an external air source device, so that the water shutoff air bags expand and the pipe orifice of the upper chord main pipe is closed; the water blocking air bags with the same structure are respectively arranged in the end pipes at the two ends of the lower chord main pipe; the tail end of the lower chord main pipe is also provided with a lower chord propeller at least used for providing a floating lift force for the tail end of the steel pipe arch rib section; the controller is arranged in the steel pipe arch rib section or the traction ship and is at least used for controlling the rotating speed of the lower chord propeller.
Optionally, the front end of the steel pipe arch rib section is further provided with a liquid level detection module electrically connected with the controller, and the liquid level detection module is used for detecting the depth of the front end of the steel pipe arch rib section immersed under the water surface, so that the controller can conveniently control the rotating speed of the lower chord propeller based on the detection result of the liquid level detection module.
Optionally, at least one liquid level detection module is arranged at the front end of each lower chord main pipe, and the controller is further used for respectively controlling the rotating speeds of the two lower chord propellers based on the difference of the detection results of the two liquid level detection modules.
Optionally, an inclination angle adjusting mechanism is further arranged between the lower chord propeller and the lower chord main pipe, so that the controller can respectively adjust the declination angles of the two lower chord propellers relative to the steel pipe arch rib sections through the inclination angle adjusting mechanism.
Optionally, an upper chord propeller electrically connected with the controller is arranged at the outer side of the tail end of the upper chord main pipe, and an included angle of 30-150 degrees is formed by the rotation centers of the upper chord propellers arranged at the outer sides of the upper chord main pipes.
Optionally, the upper chord propeller and the lower chord propeller are respectively communicated with an air pump arranged in the traction ship through air pipes.
In a second aspect of the present invention, there is provided a method of self-floating transport of steel pipe arch rib segments, comprising the steps of:
the water blocking air bags are respectively arranged at the pipe orifices at the two ends of the upper chord main pipe and the two ends of the lower chord main pipe of the steel pipe arch rib section, and the water blocking air bags are inflated to expand and close the corresponding pipe orifices;
hoisting the steel pipe arch rib section to water in a selected water area, and starting a lower chord propeller arranged at the tail end of a lower chord main pipe through a controller to adjust the suspension posture of the steel pipe arch rib section;
the suspended steel pipe arch rib segments are towed by a towing vessel and transported to a designated water area.
Optionally, the suspension gesture of steel pipe arch rib section is adjusted to lower chord screw that sets up at lower chord main pipe tail end through the controller start-up, includes:
the front end of the steel pipe arch rib section is provided with a liquid level detection module, and the controller controls the rotating speed of the lower chord propeller based on the detection result of the liquid level detection module.
Optionally, the liquid level detection module is arranged at the front end of the steel pipe arch rib section, and the liquid level detection module comprises:
at least one liquid level detection module is arranged at the front end of each lower chord main pipe, and the controller is used for respectively controlling the rotating speeds of the two lower chord propellers based on the difference of detection results of the two liquid level detection modules.
Optionally, the controller starts a lower chord propeller arranged at the tail end of the lower chord main pipe to adjust the suspension posture of the steel pipe arch rib section, and the method further comprises the following steps:
and an inclination angle adjusting mechanism is arranged between the lower chord propellers and the lower chord main pipe, and the controller respectively adjusts the declination angles of the two lower chord propellers relative to the arch rib sections of the steel pipe arch through the inclination angle adjusting mechanism.
According to the technical scheme, the beneficial effects of the invention are as follows:
1) The water blocking air bags arranged in the pipe orifices at the two ends of the main pipe are inflated by inflation, and the two ends of the main pipe are closed by utilizing the friction force generated by the water blocking air bags and the inner wall of the main pipe, so that the self-floating of the steel pipe arch rib section in water is realized;
2) The self-floating transportation has shallow draft, has very low requirements on a transportation channel and low transportation cost, and meets the transportation in a river channel without shipping conditions;
3) The floating force provided by the lower chord propeller is used for leveling the suspension posture of the steel pipe arch rib section, so that the exposed water surface height is small, most of river bridges can be passed, and the trafficability is good;
4) The steel pipe arch rib sections adopt self-floating transportation, so that the boarding link can be saved, and the time and the labor are saved;
5) By means of the lateral auxiliary thrust provided by the upper chord propeller, stable transportation of the steel pipe arch rib sections is guaranteed, and the gravity center is prevented from shifting and turning over.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a front view of a steel pipe arch rib segment self-floating conveyor;
FIG. 2 is a side view of a steel pipe arch rib segment self-floating transport device;
reference numerals:
1-upper chord main pipe, 2-lower chord main pipe, 3-web member steel pipe, 4-transverse connection steel pipe, 5-water shutoff air bag, 6-traction ship and 7-lower chord screw propeller.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
Referring to fig. 1-2, the self-floating conveying device for a steel pipe arch rib section provided by the invention is arranged on the steel pipe arch rib section, and the steel pipe arch rib section comprises two upper chord main pipes 1 arranged side by side at intervals and two lower chord main pipes 2 arranged side by side at intervals, wherein web member steel pipes are welded between the upper chord main pipes 1 and the lower chord main pipes 2, and transverse connection steel pipes are welded between the two upper chord main pipes 1 and between the two lower chord main pipes 2. The self-floating conveying device comprises a water shutoff air bag 5, a propeller and a controller; the water shutoff air bags 5 are respectively arranged in the end pipes at the two ends of the upper chord main pipe 1, and are plugged into the pipe orifices, one end, far away from the upper chord main pipe 1, of each water shutoff air bag 5 is provided with an air valve, and the air valves are communicated with an air pipe so as to facilitate inflation of the water shutoff air bags 5 through an external air source device, so that the water shutoff air bags 5 expand and seal the pipe orifices of the upper chord main pipe 1. Similarly, water blocking air bags 5 with the same structure are respectively arranged in the end pipes at the two ends of the lower chord main pipe 2. The two ends of the main pipe are sealed by using the friction force generated by the water shutoff air bags 5 and the inner wall of the main pipe, thereby realizing the self-floating of the arch rib section of the steel pipe. The tail end of the lower chord main pipe 2 is also provided with a lower chord propeller 7 at least used for providing a floating lift force for the tail end of the steel pipe arch rib section, and the lower chord propeller 7 is communicated with an air pump arranged in the traction ship through an air pipe; the controller is arranged in the steel arch rib segments or the towing vessel at least for controlling the rotational speed of the lower chord propeller 7. The prior steel pipe arch rib section has the defects that the gravity centers are all deviated to the tail ends of the rib sections due to the self structural reasons, the front ends of the rib sections are easy to tilt due to insufficient buoyancy of the tail ends, the head-tail balance is difficult to maintain, and the traction and the transportation are not facilitated. Therefore, the invention levels the suspension posture of the steel pipe arch rib section by means of the upward floating lift provided by the lower chord propeller 7, and adjusts the rotating speed of the lower chord propeller 7 through the controller to adjust the magnitude of the upward floating lift.
As a further improvement to the above scheme, the front end of the steel pipe arch rib section is further provided with a liquid level detection module (not shown in the figure) electrically connected with the controller, and the liquid level detection module is used for detecting the depth of the front end of the steel pipe arch rib section immersed under the water surface, so that the controller can control the rotating speed of the lower chord propeller 7 based on the detection result of the liquid level detection module. The liquid level detection module is arranged at the front end of the steel pipe arch rib section so as to be far away from a propeller arranged at the tail end of the steel pipe arch rib section, so that the phenomenon that water waves generated during the operation of the propeller excessively interfere with the detection result of the liquid level detection module is avoided, and the liquid level detection module can be a pontoon type liquid level sensor or a floating ball type liquid level sensor. In one embodiment, since the outline of the arch rib section of the steel pipe arch is approximately trapezoid, the two ends of the upper chord main pipe 1 are partially immersed in the water surface to form an ideal suspension posture, and the detection base point of the liquid level detection module is arranged at the lowest position of the front end of the arch rib section (namely the front end of the lower chord main pipe 2), when the arch rib section is in the ideal suspension posture, the detection value of the liquid level detection module is 1-1.1 times of the center distance between the front end of the upper chord main pipe 1 and the front end of the lower chord main pipe 2, so that the preset value is set. After the steel pipe arch rib section is hoisted into the water in the selected water area, if the detection value is smaller, the front end of the arch rib section sticks out of the water surface and the tail end of the arch rib section sinks, and the controller starts the lower chord propeller 7 and gradually increases the rotating speed so that the detection value reaches a preset value; after the steel pipe arch rib section is hoisted into water in a selected water area and before the lower chord propeller 7 works, if the detection value is larger, the buoyancy of the whole arch rib section is insufficient, and then a worker is required to add an air bag outside the arch rib section Zhou Ewai to increase the integral buoyancy, and then in the subsequent traction and transportation process, the liquid level change is continuously monitored and the feedback adjustment is carried out to maintain the suspension posture.
As a further improvement to the above solution, at least one liquid level detection module is provided at the front end of each lower chord main pipe 2, and the controller is further configured to control the rotation speeds of the two lower chord propellers 7 respectively based on the difference between the detection results of the two liquid level detection modules. Center of gravity shifting may also occur in the width direction of the rib segments, which is shown by a tendency of the rib segments to roll over, and thus the rotational speeds of the two lower chord propellers 7 need to be controlled differently to provide a lift force with pertinence.
As a further improvement of the above scheme, an inclination angle adjusting mechanism is further arranged between the lower chord propeller 7 and the lower chord main pipe 2, so that the controller can respectively adjust the declination angles of the two lower chord propellers 7 relative to the steel pipe arch rib sections through the inclination angle adjusting mechanism. The upward lift force provided by the lower chord propeller 7 is essentially a thrust force, and by adjusting the angle relation between the lower chord propeller 7 and the arch rib section, the arch rib section is prevented from being pushed to deviate from a route or form traction resistance when the lower chord propeller 7 works, so that the transportation difficulty is reduced.
As a further improvement to the scheme, an upper chord propeller (not shown in the figure) which is electrically connected with the controller is arranged on the outer side of the tail end of the upper chord main pipe 1, and the upper chord propeller is communicated with an air pump arranged in the traction ship through an air pipe. The rotation centers of the upper chord propellers arranged on the outer sides of the upper chord main pipes 1 form an included angle of 30-150 degrees, and preferably, the upper chord propellers arranged on the outer sides of the upper chord main pipes 1 are bilaterally symmetrical relative to the arch rib sections, and the lateral auxiliary thrust provided by the upper chord propellers ensures the stable transportation of the steel pipe arch rib sections and prevents the gravity center from shifting and turning over.
The invention also provides a self-floating conveying method of the steel pipe arch rib section, which comprises the following steps:
s1, respectively placing water shutoff air bags at the pipe orifices at the two ends of an upper chord main pipe and the two ends of a lower chord main pipe of a steel pipe arch rib section, and inflating the water shutoff air bags to expand the water shutoff air bags and close the corresponding pipe orifices;
s2, hoisting the steel pipe arch rib section into water in a selected water area, and starting a lower chord propeller arranged at the tail end of a lower chord main pipe through a controller to adjust the suspension posture of the steel pipe arch rib section;
s3, towing the suspended steel pipe arch rib sections through a towing ship and transporting the steel pipe arch rib sections to a designated water area.
The two ends of the main pipe are sealed by utilizing the friction force generated by the water shutoff air bags and the inner wall of the main pipe, so that the self-floating of the steel pipe arch rib section in water is realized; the floating force provided by the lower chord propeller is used for leveling the suspension posture of the arch rib section of the steel pipe arch, the arch rib section is mainly balanced head and tail, and the rotating speed of the lower chord propeller is adjusted by the controller to adjust the magnitude of the floating force.
As a further improvement to the above solution, the step of starting, by the controller, the lower chord propeller disposed at the tail end of the lower chord main pipe to adjust the suspension posture of the steel pipe arch rib section includes:
the front end of the steel pipe arch rib section is provided with a liquid level detection module, and the controller controls the rotating speed of the lower chord propeller based on the detection result of the liquid level detection module. The liquid level detection module is used for detecting the depth of the front end of the steel pipe arch rib section immersed below the water surface. Specifically, after the steel pipe arch rib section is hoisted into water in a selected water area, if the detection value is smaller, the front end of the arch rib section is tilted out of the water surface and the tail end of the arch rib section is sunk, and the controller starts the lower chord propeller and gradually increases the rotating speed so that the detection value reaches a preset value; after the steel pipe arch rib section is hoisted into water in a selected water area and before the lower chord propeller works, if the detection value is larger, the buoyancy of the whole arch rib section is insufficient, and a worker is required to add an air bag outside the arch rib section Zhou Ewai to increase the integral buoyancy, and then in the subsequent traction and transportation process, the liquid level change is continuously monitored and the feedback adjustment is carried out to maintain the suspension posture.
As a further improvement to the above solution, the liquid level detection module is disposed at the front end of the steel pipe arch rib segment, and includes:
at least one liquid level detection module is arranged at the front end of each lower chord main pipe, and the controller is used for respectively controlling the rotating speeds of the two lower chord propellers based on the difference of detection results of the two liquid level detection modules. The center of gravity shift may also occur in the width direction of the rib segments, which is shown as the rib segments having a tendency to roll over, and thus the rotational speeds of the two lower chord propellers need to be controlled differently to provide a lifting force in a targeted manner.
As a further improvement to the above solution, the controller starts a lower chord propeller disposed at the tail end of the lower chord main pipe to adjust the suspension posture of the steel pipe arch rib section, and further includes:
and an inclination angle adjusting mechanism is arranged between the lower chord propellers and the lower chord main pipe, and the controller respectively adjusts the declination angles of the two lower chord propellers relative to the arch rib sections of the steel pipe arch through the inclination angle adjusting mechanism. The upward buoyancy provided by the lower chord propeller is essentially a thrust, and by adjusting the angle relation between the lower chord propeller and the arch rib section, the arch rib section is prevented from being pushed to deviate from a route or form traction resistance when the lower chord propeller works, so that the transportation difficulty is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (4)
1. The steel pipe arch rib section self-floating conveying device is arranged on a steel pipe arch rib section, and the steel pipe arch rib section comprises two upper chord main pipes (1) arranged side by side at intervals and two lower chord main pipes (2) arranged side by side at intervals; the self-floating conveying device is characterized by comprising a water blocking air bag (5), a propeller and a controller; the water shutoff air bags (5) are respectively arranged in the end pipes at the two ends of the upper chord main pipe (1), one end, far away from the upper chord main pipe (1), of each water shutoff air bag (5) is provided with an air valve, and the air valves are communicated with an air pipe so as to facilitate the air inflation into the water shutoff air bags (5) through an external air source device, so that the water shutoff air bags (5) expand and seal the pipe orifice of the upper chord main pipe (1); water blocking air bags (5) with the same structure are respectively arranged in the end pipes at the two ends of the lower chord main pipe (2); the tail end of the lower chord main pipe (2) is also provided with a lower chord propeller (7) at least used for providing an upward floating lift force for the tail end of the steel pipe arch rib section; the controller is arranged in the steel pipe arch rib section or the traction ship and is at least used for controlling the rotating speed of the lower chord propeller (7); an inclination angle adjusting mechanism is further arranged between the lower chord propellers (7) and the lower chord main pipe (2), so that the controller can respectively adjust the declination angles of the two lower chord propellers (7) relative to the steel pipe arch rib sections through the inclination angle adjusting mechanism, and the declination angles are angles of rotation of the axes of the lower chord propellers around the axes of the lower chord main pipe;
the front end of the steel pipe arch rib section is also provided with a liquid level detection module electrically connected with the controller, and the liquid level detection module is used for detecting the depth of the front end of the steel pipe arch rib section immersed below the water surface so that the controller can control the rotating speed of the lower chord propeller (7) based on the detection result of the liquid level detection module;
the front end of each lower chord main pipe (2) is provided with at least one liquid level detection module, and the controller is also used for respectively controlling the rotating speeds of the two lower chord propellers (7) based on the difference of the detection results of the two liquid level detection modules.
2. The steel pipe arch rib section self-floating conveying device according to claim 1, wherein a winding screw electrically connected with a controller is arranged on the outer side of the tail end of the winding main pipe (1), winding screws are respectively arranged on the outer sides of the two winding main pipes (1), and an included angle of 30-150 degrees is formed by the axis of the winding screw around the rotation center of the axis of the winding main pipe.
3. The steel pipe arch rib segment self-floating transportation device according to claim 2, wherein the upper chord propeller and the lower chord propeller (7) are respectively communicated with an air pump arranged in a towing ship through air pipes.
4. The self-floating conveying method for the steel pipe arch rib section is characterized by comprising the following steps of:
the water blocking air bags are respectively arranged at the pipe orifices at the two ends of the upper chord main pipe and the two ends of the lower chord main pipe of the steel pipe arch rib section, and the water blocking air bags are inflated to expand and close the corresponding pipe orifices;
hoisting the steel pipe arch rib section to water in a selected water area, and starting a lower chord propeller arranged at the tail end of a lower chord main pipe through a controller to adjust the suspension posture of the steel pipe arch rib section, wherein the method comprises the following steps: an inclination angle adjusting mechanism is arranged between the lower chord propellers and the lower chord main pipe, and the controller respectively adjusts the declination angles of the two lower chord propellers relative to the steel pipe arch rib sections through the inclination angle adjusting mechanism, wherein the declination angles are angles at which the axes of the lower chord propellers rotate around the axes of the lower chord main pipe; a liquid level detection module is arranged at the front end of the arch rib section of the steel pipe arch, and a controller controls the rotating speed of the lower chord propeller based on the detection result of the liquid level detection module; at least one liquid level detection module is arranged at the front end of each lower chord main pipe, and the controller respectively controls the rotating speeds of the two lower chord propellers based on the difference of the detection results of the two liquid level detection modules;
the suspended steel pipe arch rib segments are towed by a towing vessel and transported to a designated water area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210508859.8A CN114889755B (en) | 2022-05-11 | 2022-05-11 | Self-floating conveying device and self-floating conveying method for steel pipe arch rib sections |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210508859.8A CN114889755B (en) | 2022-05-11 | 2022-05-11 | Self-floating conveying device and self-floating conveying method for steel pipe arch rib sections |
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| CN114889755A CN114889755A (en) | 2022-08-12 |
| CN114889755B true CN114889755B (en) | 2023-09-29 |
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