CN113832867A - Stability control system and method for steel truss girder floating towing - Google Patents
Stability control system and method for steel truss girder floating towing Download PDFInfo
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- CN113832867A CN113832867A CN202111274957.1A CN202111274957A CN113832867A CN 113832867 A CN113832867 A CN 113832867A CN 202111274957 A CN202111274957 A CN 202111274957A CN 113832867 A CN113832867 A CN 113832867A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses
- B63B39/03—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses by transferring liquids
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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
- B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
- B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
- B63B43/04—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability
- B63B43/06—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability using ballast tanks
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Abstract
The invention belongs to the technical field of bridge floating and towing construction, and particularly discloses a system and a method for controlling the stability of a steel truss girder floating and towing. The stability control system comprises a floating pontoon, an observation mark, an intelligent total station and a microcomputer control module; a front water tank and a rear water tank are respectively arranged at the front end and the rear end in the floating pontoon; a floating pier is arranged above the cabin of the floating pontoon. In the floating towing process of the steel truss girder, the front water tank and the rear water tank are respectively positioned on two sides of the floating towing end of the steel truss girder, the floating pier is used for towing the floating towing end of the steel truss girder, the intelligent total station is used for measuring the elevations of the two sides of the steel truss girder in real time and feeding back the elevations to the microcomputer control module, and the microcomputer control module is used for correspondingly adjusting the water amount of the front water tank or the rear water tank according to the elevation change of the two sides of the steel truss girder so as to adjust the balance of the two ends of the floating vessel, so that the floating vessel is kept stable, and the balance of the steel truss girder is ensured. The system has high feedback speed and high regulation accuracy, and is particularly suitable for occasions where the floating pontoon needs to be regulated in real time under the influence of water flow force, wind power, ship navigation and the like.
Description
Technical Field
The invention belongs to the technical field of bridge floating and towing construction, and particularly relates to a system and a method for controlling the stability of a steel truss girder floating and towing.
Background
The floating towing erection of the steel truss girder is an erection method for sliding the steel truss girder from a prefabricated site to a bridge foundation in a river along a slide rail by using a barge as a front supporting point during erection of the steel truss girder; compared with the conventional support assembly technology, the integral hoisting technology and the like, the floating frame of the steel truss girder has the obvious advantages of short construction period, good economy, short off-voyage time and the like, and is usually adopted on rivers with navigation requirements.
The floating frame of the steel truss girder is provided with a floating pier which is a floating support device needing to be arranged on the water and is used as a front supporting point of the floating frame of the bridge structure. Meanwhile, in the floating towing process, the steel truss girder needs to be supported by a floating pier, the number of sliding fulcrums of the steel truss girder changes, the steel truss girder floats, tows and slides, the steel truss girder falls into the pier, the floating boat is separated from the steel truss girder and the like, and in each working condition, the water quantity in the cabin of the floating boat needs to be adjusted through drainage or water inflow of the cabin of the floating boat so as to adjust the height of the floating boat. Due to the influence of pumping and drainage and the influence of factors such as water flow force, wind power, traction force, shore anchoring force, ship navigation and the like, the floating ship is in an unstable state in the floating and towing process, so that the elevations on two sides of the steel truss girder are deviated, the steel truss girder loses balance, and the steel truss girder can roll in serious cases. In order to ensure the balance of the steel truss girder, high requirements are provided for the stability of the floating pontoon in the construction process.
In the prior art, the stability of a floating vessel is kept by observing elevation changes of two sides of a steel truss girder and then pumping and draining water into a cabin, so that the balance of the steel truss girder is controlled; however, in the prior art, observation of the steel truss girder and control of the water quantity of the floating vessel are both manual operations, which has the problems of low adjustment accuracy and long feedback delay time among the steps, and particularly when the floating vessel is influenced by factors such as water flow force, wind power and vessel navigation, the state of the floating vessel changes continuously and irregularly, and the floating vessel needs to be adjusted in real time, so that the prior art cannot meet the requirement.
Based on the above defects and shortcomings, there is an urgent need in the art to make a further improved design for the existing stability control system for steel truss girder floating and towing, and to provide a stability control system and method thereof capable of realizing automatic monitoring and adjustment, so as to solve the problems of low adjustment accuracy and long feedback delay time between each step in the prior art, especially solve the problem that a floating vessel needs to be adjusted in real time when influenced by factors such as water flow force, wind power and vessel navigation, and ensure the balance of the steel truss girder in the floating and towing process.
Disclosure of Invention
Aiming at the defects and/or improvement requirements in the prior art, the invention provides a stability control system and a method for a steel truss girder floating trailer, which aim to solve the problems of low regulation accuracy and long feedback delay time among the steps in the prior art, particularly the problem that a floating ship needs to be regulated in real time when influenced by factors such as water flow force, wind power, ship navigation and the like, and provide a stability control system and a method capable of monitoring and automatically controlling in real time, so that the accuracy and the effectiveness of the stability regulation on the steel truss girder floating trailer are improved, the balance of the steel truss girder is ensured, and the system and the method are particularly suitable for application occasions of the steel truss girder floating trailer.
In order to achieve the above object, according to one aspect of the present invention, a stability control system for a steel truss girder float towing is provided, which includes a floating vessel, an observation target, an intelligent total station, and a microcomputer control module;
the floating pontoon comprises a floating pier, a front water tank, a rear water tank, a water pump and a pipeline;
the floating pier is fixed above the floating vessel, the top end of the floating pier is provided with two floating supporting points which are respectively positioned at the front end and the rear end of the floating vessel; in the steel truss girder floating and towing process, the floating pontoon is arranged perpendicular to the floating and towing direction of the steel truss girder, two floating and towing fulcrums are respectively supported on two sides of the floating and towing end of the steel truss girder to form two-point support, so that the steel truss girder is supported together with the fulcrums of the steel truss girder on the slide rail, the floating and towing slippage of the steel truss girder is realized, and meanwhile, the two-point support mode is more beneficial to the balance of two sides of the steel truss girder compared with the single-point support mode;
the front water tank and the rear water tank are respectively arranged at the front end and the rear end of the floating vessel, and at least one of the front water tank and the rear water tank is arranged; in the floating and towing process of the steel truss girder, the front water tank and the rear water tank respectively correspond to two sides of the floating and towing end of the steel truss girder, so that the lifting of the floating pontoon and the balance of the front end and the rear end of the floating pontoon can be controlled by adjusting the water amount of the front water tank and the rear water tank so as to maintain the balance of the two sides of the steel truss girder;
a plurality of water pumps are arranged in the floating pontoon and used for adjusting the water quantity of the front water cabin and the rear water cabin and separately adjusting the front water cabin and the rear water cabin;
the pipelines are connected with the water pumps one by one, and each pipeline is connected with the front water cabin or the rear water cabin through a branch pipe so as to realize the separate regulation of the front water cabin and the rear water cabin by the water pumps; each front water cabin or each rear water cabin is respectively connected with a branch pipe, and each branch pipe is provided with a valve for controlling the opening and closing of a branch pipe water channel;
the observation marks are provided with a plurality of floating and dragging ends for being fixed on the steel truss girder, and at least one observation mark is arranged on each of two sides of the floating and dragging end of the steel truss girder;
the intelligent total station is used for measuring the elevation of the observation target and transmitting information to the microcomputer control module;
the microcomputer control module is in electric signal connection with the water pump, the valve and the intelligent total station, receives information transmitted by the intelligent total station, judges a water tank needing water quantity adjustment and an adjusting mode of the water tank, and controls the corresponding water pump and the valve to act so as to adjust the water quantity of the corresponding water tank.
By the above conception, on one hand, the height of the steel truss girder is measured and fed back in real time through the intelligent total station so as to provide the adjusting basis and judge the adjusting effect; the height deviation of the steel truss girder is judged through the microcomputer control module, and the water tanks needing water quantity regulation and the required regulation mode are judged according to the arrangement of the front water tanks and the rear water tanks of the floating pontoon and the size of each water tank, so that the automation of control is realized, and the feedback speed is greatly improved; the front water tank and the rear water tank are respectively arranged at the two ends of the floating pontoon to correspond to the two sides of the steel truss girder, and are separately adjusted to pertinently cope with the deviation of one side of the steel truss girder, so that the adjustment accuracy of the floating pontoon is higher; two-point support is formed through two floating support points of the floating pier, and the stability of the floating pier for supporting the steel truss girder is improved.
Preferably, the floating piers are arranged at the front end and the rear end of the floating pontoon respectively, each floating pier is provided with a floating support point, and the contact surface of the floating piers with the floating pontoon is enlarged through the two floating piers so as to further improve the stability of the floating piers for supporting the steel truss girder.
Preferably, the floating piers are fixed to the hull of the vessel by welding, so as not to affect the structure of the vessel itself.
As a further preferred, the front and rear tanks are provided in plurality, respectively, and are arranged in sequence along the hull, so that the adjustment of the floating vessel is more fine and more accurate.
As a further preference, the vessel further comprises a high-elevation ballast tank and a ballast tank branch pipe; the high-pressure water tank is arranged in the middle of the ship body; one end of the water pressing cabin branch pipe is connected with the high-elevation water pressing cabin, the other end of the water pressing cabin branch pipe is connected with a pipeline, and the water pressing cabin branch pipe is provided with a valve; through setting up elevation pressurized-water tank, realize the fine setting to the steel truss girder elevation to make the regulation more meticulous.
Preferably, the valve is a regulating valve, and the flow rate of water can be controlled by the opening degree of the regulating valve, so that each water tank can be regulated more finely and accurately.
Preferably, the observation mark is arranged at the end of the diagonal web member at two sides of the floating and towing end of the steel truss girder.
According to another aspect of the present invention, there is provided a method of controlling the stability of a steel truss girder tow, comprising the steps of:
s1, recording initial values: before the steel truss girder floats and drags, the intelligent total station measures the initial value of each observation standard elevation and sends the information to the microcomputer control module; the microcomputer control module records the information;
in the floating and dragging process, the following steps are implemented:
s2, measuring the elevation: the intelligent total station measures the actual value of each observation mark elevation and sends the information of the actual value of the observation mark elevation to the microcomputer control module;
s3, determining deviation: the microcomputer control module receives the information of the actual value of the observed elevation range, compares the information with the initial value of the observed elevation range, judges whether deviation occurs or not, if yes, the step S4 is implemented, and if not, the step S2 is implemented;
s4, water quantity regulation: the microcomputer control module judges a water tank needing water quantity regulation and a required regulation mode and sends instructions to corresponding water pumps and valves; the water pump and the valve are opened according to the instruction to regulate the water quantity; the water quantity adjusting mode is as follows:
when the actual value of the observation standard elevation of any one side of the steel truss girder is higher than the initial value, the water tank of the ship end corresponding to the side is filled with water; when the actual value of the observation standard elevation of any one side of the steel truss girder is lower than the initial value, draining the water tank at the ship end corresponding to the side;
s5, measuring elevation again: the intelligent total station measures the actual value of each observation mark elevation again and sends the information of the actual value of the observation mark elevation to the microcomputer control module;
s6, judging deviation again: the microcomputer control module receives the information of the actual value of the observed elevation range, compares the information with the initial value of the observed elevation range, judges whether deviation occurs or not, if yes, the step S4 is implemented, and if not, the step S7 is implemented;
and S7, finishing adjustment: the microcomputer control module gives instructions to the water pump and the valve, the water pump and the valve are closed, and the adjustment is finished.
As an improvement of the above method, in step S4, if the actual values of the observed elevation at both sides of the steel truss are higher than the initial values, water is fed into the elevation pressurized water tank, that is, water is fed into the front water tank, the rear water tank and the elevation pressurized water tank at the same time, so as to quickly adjust the elevation of the floating and towing end of the steel truss; if the actual values of the observation standard elevations on the two sides of the steel truss girder are lower than the initial values, water is fed into the elevation water compressing cabin, namely the front water cabin, the rear water cabin and the elevation water compressing cabin are drained at the same time, so that the elevation of the floating and towing end of the steel truss girder is quickly adjusted.
As a further improvement of the above method, in step S4, if the actual values of the observed elevation on both sides of the steel truss are higher than the initial values, and the deviation values of the elevations on both sides of the steel truss are the same and smaller than a preset threshold value a1, only the elevation surge tank is filled with water to finely adjust the elevation of the floating and towing end of the steel truss; and if the elevations of the observation targets at the two sides of the steel truss girder are lower than the initial value, and the deviation values of the elevations at the two sides of the steel truss girder are the same and are smaller than a preset limit value a2, only the elevation pressurized water tank drains water so as to finely adjust the elevation of the floating and towing end of the steel truss girder.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the height of the steel truss girder is measured and fed back in real time through the intelligent total station, so that the adjusting basis is provided, the adjusting effect is judged, and the adjusting accuracy is high; the microcomputer control module judges the elevation deviation of the steel truss girder and determines the water tank needing water quantity adjustment and the needed adjustment mode, so that the automation of control is realized, and the feedback speed is greatly improved; the front water tank and the rear water tank are respectively arranged at the two ends of the floating pontoon to correspond to the two sides of the steel truss girder, and the front water tank and the rear water tank are separately adjusted to pertinently adjust the deviation of one side of the steel truss girder, so that the adjustment accuracy of the floating pontoon is higher; the two-point support of the floating pier improves the stability of the steel truss girder support of the floating pier.
2. Through setting up a plurality of preceding water tanks and back water tanks, every water tank can be adjusted alone, makes more meticulous to the regulation of pontoon, and the degree of accuracy is higher.
3. Through setting up elevation pressurized-water tank, to its independent control, realize the fine setting to the elevation that the steel truss floated the end of dragging, make the regulation more meticulous, the degree of accuracy is higher.
4. By using the regulating valve, the flow of water is controlled through the opening degree of the regulating valve, so that each water tank is more finely regulated, and the accuracy is further improved.
Drawings
FIG. 1 is a schematic layout of an embodiment of the present invention;
FIG. 2 is a front view of a vessel and pier in an embodiment of the invention;
fig. 3 is a control flow diagram of an embodiment of the invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
the system comprises a floating pontoon 1, an observation target 2, an intelligent total station 3, a microcomputer control module 4, a floating pier 11, a front water tank 12, a rear water tank 13, a water pump 14, a pipeline 15, a high-elevation pressure water tank 16, a branch pipe 151 and a pressure water tank branch pipe 152.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the stability control system for steel truss girder floating tow provided by the embodiment of the present invention includes a floating vessel 1, an observation target 2, an intelligent total station 3, and a microcomputer control module 4;
the floating pontoon 1 comprises a floating pier 11, a front water tank 12, a rear water tank 13, a water pump 14 and a pipeline 15;
the floating pier 11 is fixed above a cabin of the floating vessel 1, and two floating support points are arranged at the top end of the floating pier 11 and are respectively positioned at the front end and the rear end of the floating vessel 1;
the front water tank 12 and the rear water tank 13 are respectively arranged at the front end and the rear end of the floating pontoon 1, and at least one of the front water tank and the rear water tank is respectively arranged; in the steel truss girder floating process, the front water tank 12 and the rear water tank 13 of the floating vessel 1 respectively correspond to two sides of the floating end of the steel truss girder, so that the lifting of the floating vessel 1 and the balance of the front and rear ends of the floating vessel 1 can be controlled by adjusting the water amount of the front water tank 12 and the rear water tank 13 of the floating vessel 1, so as to maintain the balance of the two sides of the steel truss girder;
a plurality of water pumps 14 are arranged in the floating pontoon 1 and used for adjusting the water quantity of the front water tank 12 and the rear water tank 13 and separately adjusting the front water tank 12 and the rear water tank 13;
the pipelines 15 are connected with the water pumps 14 one by one, and each pipeline 15 is connected with the front water cabin 12 or the rear water cabin 13 through a branch pipe 151; so as to realize the separate regulation of the front water cabin 12 and the rear water cabin 13; each front water cabin 12 or each rear water cabin 13 is respectively connected with a branch pipe 151, and each branch pipe 151 is provided with a valve for controlling the opening and closing of a water path of the branch pipe 151;
the observation marks 2 are provided with a plurality of floating and dragging ends for being fixed on the steel truss girder, and at least one observation mark is arranged on each of two sides of the steel truss girder floating and dragging end;
the intelligent total station 3 is used for measuring the elevation of each observation mark 2 and transmitting the information to the microcomputer control module 4;
the microcomputer control module 4 is in electrical signal connection with the water pump 14, the valve and the intelligent total station 3, and is used for receiving information transmitted by the intelligent total station 3, judging a water tank needing water quantity adjustment and an adjustment mode of the water tank, and controlling the corresponding water pump 14 and the valve to act so as to adjust the water quantity of the corresponding water tank.
Through the mutual matching of the components, before the steel truss girder floats and drags, the intelligent total station 3 measures the initial value of the elevation of the observation mark 2 on the two sides of the steel truss girder floating and dragging end; in the process of floating and towing the steel truss girder, the intelligent total station 3 measures the actual elevation values of the observation targets 2 at the two sides of the floating and towing end of the steel truss girder and transmits the information of the measurement result to the microcomputer control module 4, the microcomputer control module 4 receives the information transmitted by the intelligent total station 3, judges the water tank needing water quantity adjustment and the needed adjustment mode according to the deviation of the actual elevation value and the initial elevation value of the observation targets 2, and controls the water pump 14 and the valve to adjust the water quantity of the corresponding water tank; the intelligent total station 3 measures again until the elevation of the observation mark 2 at the floating and towing end of the steel truss girder returns to the initial value; therefore, the stability control system provided by the embodiment of the invention can realize automatic control on the stability of the steel truss girder floating support, and has advancement.
Each of these components will be described in more detail below.
In the embodiment of the present invention, as shown in fig. 2, since the steel truss is wide, two floating piers 11 are provided, respectively near the bow and stern of the floating vessel 1, and each floating pier 11 is provided with a floating support point to form two-point support; in the embodiment, the floating pontoon 1 transversely advances in the floating and towing process, the bow and the stern of the pontoon are respectively positioned at two sides of the floating and towing end of the steel truss girder, and two floating piers 11 respectively support two sides of the floating and towing end of the steel truss girder; in some embodiments, one floating pier 11 is provided, and two floating support points are arranged on the floating pier 11 to be respectively supported on two sides of the floating end of the steel truss girder; in the present embodiment, floating piers 11 are fixed to the tank of floating vessel 1 by welding, and the connection in this manner has no influence on the tank structure of floating vessel 1; in some embodiments, the structure of vessel 1 may also be utilized for bolting or other securing means.
In the embodiment of the present invention, as shown in fig. 1, two front tanks 12 and two rear tanks 13 are respectively provided in floating vessel 1, depending on the structure of floating vessel 1 itself; in some embodiments, a front water chamber 12 and a rear water chamber 13 can be respectively arranged, or more than two front water chambers 12 and more than two rear water chambers 13 can be respectively arranged; when the front water tank 12 and the rear water tank 13 are provided, it is preferable that the front water tank 12 and the rear water tank 13 are equal in number and the capacities of the front water tank 12 and the rear water tank 13 are equal or close to each other.
In the embodiment of the present invention, as shown in fig. 1, two water pumps 14 are provided, respectively provided at the bow and stern of the floating vessel 1, to balance the weight of the floating vessel 1 end to end; in the embodiment, the water pump 14 at the bow of the ship adjusts the water volume of the front water tank 12, and the water pump 14 at the stern of the ship adjusts the water volume of the rear water tank 13; in some embodiments, the number of water pumps 14 may also be increased, for example one water pump 14 for each of the front and rear tanks 12, 13, to allow for individual adjustment of each tank.
In the embodiment of the present invention, as shown in fig. 1, two pipes 15 are provided, one pipe 15 connecting the two front tanks 12 to the water pump 14 at the bow of the vessel, and the other pipe 15 connecting the two rear tanks 13 to the water pump 14 at the stern of the vessel.
In an embodiment of the present invention, as shown in FIG. 1, vessel 1 further includes a high-elevation ballast tank 16 and a ballast tank leg 152; the high-elevation water compressing cabin 16 is arranged in the middle of the ship body; one end of the surge tank branch pipe 152 is connected to the high surge tank 16, and the other end is connected to a pipe 15; in this embodiment, the hold-down tank branch pipe 152 is connected to the pipe 15 at the bow of the ship, and the amount of water in the high-pressure hold-down tank 16 is adjusted by the water pump 14 provided at the bow of the ship; the surge tank branch pipe 152 is provided with a valve; by providing high-elevation ballast tanks 16, adjustments to vessel 1 are made more finely.
In the embodiment of the invention, the valve is the regulating valve, and the flow of water can be controlled through the opening degree of the valve, so that each water tank can be more finely regulated and the accuracy is higher.
In the embodiment of the invention, as shown in fig. 2, the observation mark 2 is provided with two inclined web member ends which are respectively fixed on two sides of the floating and towing end of the steel truss girder.
The above examples are used to illustrate the stability control system of the steel truss girder floating and dragging, and do not limit the scope of the present invention.
The method for controlling the floating and towing stability of the steel truss girder according to the embodiment of the invention comprises the following steps:
s1, recording initial values: before the steel truss girder floats and drags, the intelligent total station 3 measures the initial value of the elevation of each observation mark 2 and sends the information to the microcomputer control module 4; the microcomputer control module 4 records the information;
in the floating and dragging process:
s2, measuring the elevation: the intelligent total station 3 measures the actual value of the elevation of the observation target 2 and sends the information of the actual value of the elevation of the observation target 2 to the microcomputer control module 4;
s3, determining deviation: the microcomputer control module 4 receives the information of the actual elevation value of the observation target 2, compares the information with the initial elevation value of the observation target 2, and judges whether deviation occurs, if so, the step S4 is implemented, and if not, the step S2 is implemented;
s4, water quantity regulation: the microcomputer control module 4 judges the water tank which needs to be regulated and the required regulation mode, and sends instructions to the corresponding water pump 14 and the valve; the water pump 14 and the valve are opened according to the instruction to regulate the water quantity; the water quantity adjusting mode is as follows:
when the actual value of the elevation of the observation mark 2 at any side of the steel truss girder is higher than the initial value, the water tank at the ship end corresponding to the side is filled with water; when the actual value of the elevation of the observation mark 2 at any side of the steel truss girder is lower than the initial value, draining the water tank at the ship end corresponding to the side;
specifically, the method comprises the following steps:
if the actual elevation values of the observation marks 2 on the two sides of the steel truss girder are higher than the initial values, the front water tank 12 and the rear water tank 13 are filled with water simultaneously; in this embodiment, there is also included simultaneous drainage of the high-elevation sump 16; in some embodiments, if the actual elevation values of the observation targets 2 on both sides of the steel truss girder are higher than the initial value, and the deviation values of the elevations on both sides of the steel truss girder are the same and smaller than the preset limit value a1, the elevation of the floating and towing end of the steel truss girder can be finely adjusted by only feeding water into the elevation surge tank 16; the value of a1 is preset according to the weight of the floating pontoon 1 and the steel truss girder, the size of each water tank of the floating pontoon 1 and other factors; in the present embodiment, a1 is 1 cm.
If the actual elevation values of the observation marks 2 on the two sides of the steel truss girder are lower than the initial value, the front water tank 12 and the rear water tank 13 drain water simultaneously; in this embodiment, the high-pressure water tank 16 is also included to be filled with water; in some embodiments, if the actual elevation values of the observation targets 2 on both sides of the steel truss girder are lower than the initial value, and the deviation values of the elevations on both sides of the steel truss girder are the same and are smaller than the preset limit value a2, the elevation of the floating and towing end of the steel truss girder can be finely adjusted by only discharging water from the elevation pressure water tank 16; the value of a2 is preset according to the weight of the floating pontoon 1 and the steel truss girder, the size of each water tank of the floating pontoon 1 and other factors; in the present embodiment, a1 is 1 cm.
If the actual value of the elevation of the observation target 2 on the same side with the front water cabin 12 is higher than the initial value, and the actual value of the elevation of the observation target 2 on the same side with the rear water cabin 13 is lower than the initial value, the front water cabin 12 is filled with water, and the rear water cabin 13 is drained;
if the actual value of the elevation of the observation target 2 on the same side with the front water cabin 12 is lower than the initial value, and the actual value of the elevation of the observation target 2 on the same side with the rear water cabin 13 is higher than the initial value, draining water from the front water cabin 12 and simultaneously feeding water into the rear water cabin 13;
if the actual elevation value of the observation mark 2 on the same side of the front water cabin 12 is higher than the initial value, only the front water cabin 12 is filled with water, and the water pump 14 and the valve of the rear water cabin 13 do not act;
if the actual elevation value of the observation mark 2 on the same side of the rear water cabin 13 is higher than the initial value, only the rear water cabin 13 is filled with water, and the water pump 14 and the valve of the front water cabin 12 do not act;
if the actual elevation value of the observation mark 2 on the same side of the front water cabin 12 is lower than the initial value, only the front water cabin 12 drains water, and the water pump 14 and the valve of the rear water cabin 13 do not act;
if the actual elevation value of the observation mark 2 on the same side of the rear water cabin 13 is lower than the initial value, only the rear water cabin 13 drains water, and the water pump 14 and the valve of the front water cabin 12 do not act;
in the embodiment, when the quantity of water in the front water tanks 12 is adjusted, the speed can be adjusted by adding blocks by adjusting the two front water tanks 12 simultaneously according to the quantity of water to be fed or drained; the elevation of one side corresponding to the steel truss girder can be finely adjusted by only adjusting the water quantity of one front water tank 12 close to the end part of the ship body; similarly, when the water amount of the rear water tanks 13 is adjusted, the speed can be adjusted by adding blocks by simultaneously adjusting the two rear water tanks 13 according to the amount of water inflow or water drainage required; the elevation of the corresponding side of the steel truss girder can be finely adjusted by adjusting the water quantity of only one rear water tank 13 close to the end part of the ship body.
In this embodiment, when the water volume of the front water tank 12, the rear water tank 13 and the high-pressure water tank 16 is adjusted, the microcomputer control module 4 can also control the opening of the valve corresponding to each water tank, and adjust each water tank respectively, so that the adjustment of each water tank is more precise.
S5, measuring elevation again: the intelligent total station 3 measures the actual value of the elevation of each observation target 2 again and sends the information of the actual value of the elevation of the observation target 2 to the microcomputer control module 4;
s6, judging deviation again: the microcomputer control module 4 receives the information of the actual elevation value of the observation target 2, compares the information with the initial elevation value of the observation target 2, and judges whether deviation occurs, if so, the step S4 is implemented, and if not, the step S7 is implemented;
and S7, finishing adjustment: the microcomputer control module 4 gives instructions to the water pump 14 and the valve, the water pump 14 and the valve are closed, and the adjustment is finished.
The method for controlling the floating and towing stability of the steel truss girder comprises the steps of inputting the weight and the size of a floating ship 1, the arrangement and the size of a front water tank 12, a rear water tank 13 and a high-pressure water tank 16, the weight of a floating pier 11, the weight of the steel truss girder, the number of floating and towing fulcrums of the steel truss girder at a floating and towing end and a sliding end and the like in a microcomputer control module 4 in advance, and establishing a floating and towing model in the microcomputer control module 4; in the floating and dragging process, the microcomputer control module 4 carries out calculation according to the floating and dragging model so as to judge the water tank needing water quantity regulation and a corresponding regulation mode.
In addition, in the process that the floating pontoon 1 supports the steel truss girder and the steel truss girder falls into the pier, the stability control system can also realize the control on the stability of the floating pontoon 1; the specific method comprises the following steps:
when the floating pontoon 1 supports the steel truss girder, the microcomputer control module 4 controls the water pump 14 and the valve to be opened, so that the front water tank 12 and the rear water tank 13 are drained, and the floating pontoon 1 is lifted; meanwhile, the microcomputer control module 4 adjusts the water pump 14 and the valve to coordinate the water discharging speed of the front water tank 12 and the rear water tank 13, so that the floating ship 1 is kept horizontal in the lifting process until two floating supporting points of the floating pier 11 respectively support the two sides of the steel truss girder.
When the steel truss girder falls into the pier, the microcomputer control module 4 controls the water pump 14 and the valve to be opened, so that the front water tank 12 and the rear water tank 13 are filled with water, and the floating pontoon 1 descends; meanwhile, the microcomputer control module 4 adjusts the water pump 14 and the valve to coordinate the water inlet speeds of the front water tank 12 and the rear water tank 13, so that the floating ship 1 is kept horizontal in the descending process until the floating and dragging end of the steel truss girder falls on the bridge foundation.
In conclusion, according to the stability control system and the method for the steel truss girder floating and towing, the stability of the steel truss girder floating and towing is adjusted quickly, accurately, finely and automatically, and the system and the method are particularly suitable for application occasions of the steel truss girder floating and towing.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A stability control system of a steel truss girder float is characterized by comprising a floating pontoon (1), an observation target (2), an intelligent total station (3) and a microcomputer control module (4);
the floating pontoon (1) comprises a floating pier (11), a front water tank (12), a rear water tank (13), a water pump (14) and a pipeline (15); the floating piers (11) are fixed above a cabin of the floating ship (1), and two floating support points are arranged at the top ends of the floating piers (11) and are respectively positioned at the front end and the rear end of the floating ship (1); the front water tank (12) and the rear water tank (13) are respectively arranged at the front end and the rear end of the cabin of the floating vessel (1), and at least one of the front water tank and the rear water tank is arranged; a plurality of water pumps (14) are arranged in the floating pontoon (1); the pipelines (15) are connected with the water pumps (14) one by one, and each pipeline (15) is connected with the front water cabin (12) or the rear water cabin (13) through a branch pipe (151); each front water cabin (12) or each rear water cabin (13) is respectively connected with a branch pipe (151), and each branch pipe (151) is provided with a valve;
the observation marks (2) are provided with a plurality of floating and dragging ends for being fixed on the steel truss girder, and at least one observation mark is arranged on each of two sides of the floating and dragging end of the steel truss girder;
the intelligent total station (3) is used for measuring the elevation of the observation target (2) and transmitting information to the microcomputer control module (4);
the microcomputer control module (4) is in electric signal connection with the water pump (14), the valve and the intelligent total station (3).
2. The stability control system according to claim 1, wherein there are two said floating piers (11) located at the front and rear ends of said floating vessel (1), and each said floating pier (11) is provided with a floating support point.
3. The stability control system according to claim 1, wherein the front and rear tanks (12, 13) are provided in plurality, respectively, and are arranged in sequence along the hull.
4. The stability control system of claim 1, wherein the vessel (1) further comprises a high-elevation ballast tank (16) and a ballast tank leg (152); the high-elevation water compressing cabin (16) is arranged in the middle of the ship body; one end of the water compressing cabin branch pipe (152) is connected with the high-elevation water compressing cabin (16), the other end of the water compressing cabin branch pipe is connected with the pipeline (15), and the water compressing cabin branch pipe (152) is provided with a valve.
5. The stability control system of claim 1 or 4, wherein the valve is a regulator valve.
6. Stability control system according to claim 1, characterized in that the observation marker (2) is arranged at the diagonal web member ends on both sides of the trailing end of the steel girder.
7. Method for controlling the towing stability of a steel girder according to any one of claims 1-6, comprising the steps of:
s1, recording initial values: before the steel truss is floated and towed, the intelligent total station (3) measures an initial value of the elevation of the observation mark (2) and sends the information to the microcomputer control module (4); the microcomputer control module (4) records the information;
in the floating and dragging process, the following steps are implemented:
s2, measuring the elevation: the intelligent total station (3) measures the actual value of the elevation of the observation target (2) and sends the information of the actual value of the elevation of the observation target (2) to the microcomputer control module (4);
s3, determining deviation: the microcomputer control module (4) receives the information of the actual elevation value of the observation target (2), compares the information with the initial elevation value of the observation target (2), judges whether deviation occurs or not, if yes, the step S4 is implemented, and if not, the step S2 is implemented;
s4, water quantity regulation: the microcomputer control module (4) judges a water tank needing water quantity adjustment and a needed adjusting mode and issues instructions to the corresponding water pump (14) and the corresponding valve; the water pump (14) and the valve are opened according to instructions to regulate the water quantity; the water quantity adjusting mode is as follows:
when the actual value of the elevation of the observation mark (2) on any side of the steel truss girder is higher than the initial value, the water tank at the ship end corresponding to the side is filled with water; when the actual value of the elevation of the observation mark (2) on any side of the steel truss girder is lower than the initial value, draining the water tank at the ship end corresponding to the side;
s5, measuring elevation again: the intelligent total station (3) measures the actual value of the elevation of the observation mark (2) again and sends the information of the actual value of the elevation of the observation mark (2) to the microcomputer control module (4);
s6, judging deviation again: the microcomputer control module (4) receives the information of the actual elevation value of the observation target (2), compares the information with the initial elevation value of the observation target (2), judges whether deviation occurs or not, if yes, the step S4 is implemented, and if not, the step S7 is implemented;
and S7, finishing adjustment: and the microcomputer control module (4) gives instructions to the water pump (14) and the valve, the water pump (14) and the valve are closed, and the adjustment is finished.
8. The method for controlling the stability of the steel truss girder towed by the floating platform as claimed in claim 7, wherein in step S4, if the actual elevation values of the observation targets (2) on both sides of the steel truss girder are higher than the initial elevation value, the method further comprises the step of feeding water into the high-elevation pressurized water tank (16); and if the actual values of the elevations of the observation marks (2) on the two sides of the steel truss girder are lower than the initial values, draining water from the elevation pressurized water tank (16).
9. The method for controlling the stability of the steel truss girder as claimed in claim 7, wherein in step S4, if the actual elevation values of the observation targets (2) on both sides of the steel truss girder are higher than the initial elevation value and the deviation value of the elevation values on both sides of the steel truss girder is the same and smaller than a predetermined threshold value a1, only the high-pressure water tanks (16) are filled with water.
10. The method for controlling the stability of the steel girder according to claim 7, wherein in step S4, if the actual elevation values of the observation targets (2) on both sides of the steel girder are lower than the initial value and the deviation value of the elevation values on both sides of the steel girder is the same and less than a predetermined threshold value a2, only the high-pressure watertank (16) is drained.
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