An underwater positioning method for a pressure-bearing floating pontoon of a floating bridge

Abstract

The present invention discloses a method for water positioning of a pressure-bearing floating cylinder of a floating bridge, including: Step 1, erecting a bottom platform and a berthing pier; Step 2, towing the floating cylinder to the vicinity of the bottom platform by a tugboat; Step 3, completing the initial positioning of the floating cylinder through four platform winches on the bottom platform and the berthing pier winch on the berthing pier; Step 4, injecting ballast water into the floating cylinder to make the floating cylinder sink; Step 5, sitting the floating cylinder on the bottom platform; Step 6, starting a pair of longitudinal jacks and two pairs of transverse jacks on the bottom platform to finely adjust the planar position of the floating cylinder; Step 7, after successively performing the operation of connecting the pier body and the operation of connecting the pier body and the main beam on the floating cylinder, first use a water pump to pump out the ballast water in the floating cylinder to make the floating cylinder float, and then use a tugboat to tow the floating cylinder together with the pier body and the main beam on the floating cylinder away from the working area of the bottom platform. The present invention can ensure the stability of the floating cylinder in water, facilitating the subsequent docking of the floating cylinder with the pier body and the pier body with the main beam.

Description

Technical Field

[0001] The present invention relates to a method for positioning a pressure-bearing floating cylinder of a floating bridge on water. Background Art

[0002] In the past 30 years, floating bridges have been applied to modern infrastructure construction. Their technologies have developed rapidly and gradually become mature, and they can be used as an important part of modern infrastructure. However, compared with land bridges including cable-stayed bridges and suspension bridges, the information on floating bridges is still very limited, especially the construction records, environmental conditions, durability, operation, and performance of floating bridges. Currently, the number of long floating bridges in the world is very limited, only about 20.

[0003] Most of the floating bridges built abroad are of continuous floating cylinder structure. In this type of floating bridge, the square floating cylinders at the lower part are connected end to end to form a continuous floating body structure. The upper part of the floating cylinder can directly bear the vehicle traffic load, or piers or frame structures can be set to raise the bridge deck elevation.

[0004] In the construction process of existing floating bridges, a splicing structure is generally adopted. There are floating bridge connectors between the floating bridge units. The floating bridge connectors dock the floating bridge units with each other to form an integral floating bridge structure. Since the docking accuracy requirements for steel structure floating bridges are relatively high, that is, when the floating cylinder of the steel structure on water is docked with the pier body and the pier body is docked with the main beam, the positioning accuracy requirements for the floating cylinder are high. And the floating cylinder is in a floating state, making the positioning more difficult. Therefore, how to ensure the stability of the floating cylinder in water is a key problem to be solved urgently. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a method for positioning a pressure-bearing floating cylinder of a floating bridge on water, which can ensure the stability of the floating cylinder in water and facilitate the subsequent docking of the floating cylinder with the pier body and the pier body with the main beam.

[0006] The purpose of the present invention is achieved as follows: A method for positioning a pressure-bearing floating cylinder of a floating bridge on water, comprising the following steps:

[0007] Step 1: Set up the bottom platform and the berthing pier. The bottom platform includes steel pipe piles driven into the seabed, a platform slab fixed on the top surfaces of the steel pipe piles, four platform limiting columns installed on the platform slab, and a planar fine-tuning mechanism. The steel pipe piles include left steel pipe piles, right steel pipe piles, and the first row to the sixth row of transverse steel pipe piles. Both the first row and the sixth row of transverse steel pipe piles consist of two steel pipe piles, and the second row to the fifth row of transverse steel pipe piles each consist of three steel pipe piles. The platform slab includes a middle longitudinal distribution beam fixed between the top surfaces of the left steel pipe pile and the right steel pipe pile, two side longitudinal distribution beams respectively fixed at the front and rear of the second to fifth row of transverse steel pipe piles, a first short transverse distribution beam and a second short transverse distribution beam respectively fixed on the top surfaces of the first row and the sixth row of transverse steel pipe piles, and a first long transverse distribution beam to a fourth long transverse distribution beam respectively fixed on the top surfaces of the second row, the third row, the fourth row, and the fifth row of transverse steel pipe piles. The four platform limiting columns are respectively installed on the rear top surfaces of the first long transverse distribution beam to the fourth long transverse distribution beam, and a berthing column working platform is fixed on each of the four platform limiting columns. A platform winch is installed on each berthing column working platform. The planar fine-tuning mechanism includes a pair of longitudinal jacks respectively installed at both ends of the middle longitudinal distribution beam, and two pairs of transverse jacks respectively installed at both ends of the first short transverse distribution beam and both ends of the second short transverse distribution beam. The berthing pier is arranged beside one end of the middle longitudinal distribution beam of the bottom platform and includes a berthing pier foundation fixed on the seabed, a berthing pier column fixed on the berthing pier foundation, and a berthing pier working platform installed on the berthing pier column. A berthing pier winch is installed on the berthing pier working platform.

[0008] Step 2: Tow the floating drum near the bottom platform. Four side mooring rope piles, one end mooring rope pile, and a water pumping and injection port are arranged on the top surface of the floating drum. Prisms are respectively installed at the four corners of the bottom pier body at the center of the top surface of the floating drum.

[0009] Step 3: First, respectively tie the steel wire ropes of the berthing pier winch and the four platform winches to the end mooring rope pile and the four side mooring rope piles on the floating drum. Then start the four platform winches to make the floating drum dock on the four platform limiting columns. Next, start the berthing pier winch to make one end of the floating drum closely adhere to the berthing pier column, completing the preliminary positioning of the floating drum.

[0010] Step 4: Place water pumps on the floating drum and inject ballast water into the floating drum. Synchronously loosen the steel wire ropes of the berthing pier winch and the four platform winches to make the floating drum sink.

[0011] Step 5: During the sinking process of the buoy, the elevation of the buoy is measured, and the water injection amount is calculated by measuring the water depth in the buoy, and the top elevation of the buoy is measured at the same time; when the water injection amount increases and the change in the top elevation of the buoy is much smaller than the change in the water depth, it is determined that the buoy has sat on the bottom platform, and water injection is stopped at this time;

[0012] Step 6: Use the total station to measure the prisms at the four corners of the bottom pier on the pontoon to determine the plane position deviation of the pontoon, start a pair of longitudinal jacks and two pairs of transverse jacks on the bottom platform, fine-tune the plane position of the pontoon, and use the total station to re-measure synchronously until the error meets the specification requirements to complete the precise positioning of the pontoon;

[0013] Step seven, after carrying out the pier body heightening process and the pier body and main beam connection process on the pontoon, first use a water pump to pump out the ballast water in the pontoon to make the pontoon float, and then drag the pontoon together with the pier body and main beam on the pontoon away from the working area of the base platform.

[0014] The above-mentioned method for positioning the pressure-bearing buoy of a floating bridge in water, wherein, when performing step one, transverse parallel connections are arranged between each row of transverse steel pipe piles, and longitudinal parallel connections are arranged between the first row of transverse steel pipe piles to the sixth row of transverse steel pipe piles; the transverse parallel connections are connected between the four platform limit columns; and a diagonal brace is arranged on the rear side of each platform limit column.

[0015] The above-mentioned method for positioning the pressure-bearing buoy of a floating bridge in water, wherein, when performing step one, the plane of the berthing pier foundation is a right-angled triangle and includes three berthing pier steel pipe piles and a berthing pier foundation platform arranged on the top surface of the three berthing pier steel pipe piles; the berthing pier column is connected to a berthing pier steel pipe pile close to the middle longitudinal distribution beam, and a diagonal brace is arranged between the berthing pier column and the berthing pier foundation platform.

[0016] In the above-mentioned method for positioning the pressure-bearing buoy of a floating bridge on water, when performing step five, the water depth in the buoy is measured every 10 cm.

[0017] The method for positioning the pressure-bearing buoy of a floating bridge on water of the present invention has the following characteristics: a bottom platform and a pier are set up on water, and a winch is set on each of the bottom platform and the pier, the buoy is dragged above the bottom platform, and then ballast water is injected into the buoy so that the buoy is seated on the bottom platform, and then the plane position of the buoy is adjusted by a plane fine adjustment mechanism set on the bottom platform to complete the precise positioning of the buoy. The bottom platform and the pier used in the present invention not only provide stable support for the buoy, but also prevent the buoy from being washed away or floating by the water flow, and can also avoid causing harm or damage to the buoy, so as to facilitate the subsequent docking of the buoy with the pier body and the pier body with the main beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is the plan view of the bottom platform erected in the first step of the present invention;

[0019] Figure 2 It is Figure 1 the view in the direction of A-A in

[0020] Figure 3 It is Figure 1 the view in the direction of B-B in

[0021] Figure 4 It is Figure 1 the view in the direction of C-C in

[0022] Figure 5 It is the elevation view of the berthing pier erected in the first step of the present invention;

[0023] Figure 6 It is the plan view of the floating pontoon to be positioned in the second step of the present invention;

[0024] Figure 7 It is the first state diagram in the third step of the present invention;

[0025] Figure 8 It is the second state diagram in the third step of the present invention. Detailed implementation manners

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Please refer to Figures 1 to 8 , the method for water positioning of the floating pontoon of the present invention includes the following steps:

[0028] Step 1, erect a bottom platform 1 and a berthing pier 2. The bottom platform 1A includes steel pipe piles driven into the seabed, platform plates fixed on the top surfaces of the steel pipe piles, four platform limit columns 15 installed on the platform plates, and a plane fine-tuning mechanism; among them,

[0029] The steel pipe piles include a left steel pipe pile 13a, a right steel pipe pile 13b, and the first row to the sixth row of transverse steel pipe piles 131 - 136; both the first row of transverse steel pipe piles 131 and the sixth row of transverse steel pipe piles 136 are composed of two steel pipe piles, and the second row to the fifth row of transverse steel pipe piles 132 - 135 are all composed of three steel pipe piles; longitudinal cross-ties are arranged between the first row of transverse steel pipe piles 131 to the sixth row of transverse steel pipe piles 136; transverse cross-ties are arranged between each row of transverse steel pipe piles;

[0030] The platform slab includes a middle longitudinal distribution beam 140 fixed between the top surfaces of the left steel pipe pile and the right steel pipe pile, two side longitudinal distribution beams 141 respectively fixed to the front and rear of the second row of transverse steel pipe piles 132 to the fifth row of transverse steel pipe piles 135, a first short transverse distribution beam 142 and a second short transverse distribution beam 143 respectively fixed to the top surfaces of the first row of transverse steel pipe piles 131 and the sixth row of transverse steel pipe piles 136, and a first long transverse distribution beam 144 to a fourth long transverse distribution beam 147 respectively fixed to the top surfaces of the second row of transverse steel pipe piles 132, the third row of transverse steel pipe piles 133, the fourth row of transverse steel pipe piles 134, and the fifth row of transverse steel pipe piles 135;

[0031] Four platform limit columns 15 are respectively installed on the rear top surfaces of the first long transverse distribution beam 144 to the fourth long transverse distribution beam 147. A transverse bracing is connected between the four platform limit columns 15, and a diagonal bracing frame is provided at the rear side of each platform limit column 15. A mooring post working platform 150 is respectively fixed on each of the four platform limit columns 15, and a platform winch 16 is respectively installed on each mooring post working platform 150;

[0032] The plane fine adjustment mechanism includes a pair of longitudinal jacks 17 respectively installed at both ends of the middle longitudinal distribution beam 140 and two pairs of transverse jacks 18 respectively installed at both ends of the first short transverse distribution beam 142 and both ends of the second short transverse distribution beam 143 (see Figures 1 to 4 );

[0033] The mooring pier 2 is arranged beside the right end of the middle longitudinal distribution beam 140 of the bottom-supported platform 1 and includes a mooring pier foundation 20 fixed on the seabed, a mooring pier column 21 fixed on the mooring pier foundation 20, and a mooring pier working platform 210 installed on the mooring pier column 21. A mooring pier winch 22 is installed on the mooring pier working platform 210. The plane of the mooring pier foundation 20 is a right triangle and includes three mooring pier steel pipe piles and a mooring pier foundation platform arranged on the top surfaces of the three mooring pier steel pipe piles. The mooring pier column 21 is connected to one mooring pier steel pipe pile close to the middle longitudinal distribution beam 140, and a diagonal bracing frame is arranged between the mooring pier column 21 and the mooring pier foundation platform (see Figure 1 and Figure 5 );

[0034] Step two, use a tugboat to tow the floating drum 3 to near the bottom-supported platform 1. A terminal cable pile 31, four side cable piles 32, and a water pumping and injection port 33 are arranged on the top surface of the floating drum 3. A prism 34 is respectively installed at the four corners of the bottom pier body 30 at the center of the top surface of the floating drum 3 for positioning measurement (see Figure 6 );

[0035] Step 3: First, tie the wire rope of the berthing winch 22 and the wire ropes of the four platform winches 16 to the end cable pile 31 and the four side rope piles 32 on the buoy 3, and then start the four platform winches 16 to dock the buoy 3 on the four platform limit columns 15 (see FIG. Figure 7 ), and then start the berthing pier winch 22 to make the right end of the buoy 3 close to the berthing pier column 21, completing the initial positioning of the buoy 3 (see Figure 8 );

[0036] Step 4: Place a water pump on the buoy 3, inject ballast water into the buoy 3, and simultaneously loosen the wire ropes of the berthing pier winch 22 and the four platform winches 16 to sink the buoy 3;

[0037] Step 5: During the sinking process of the buoy, the elevation of the buoy is measured, and the amount of water injected is calculated by measuring the water depth in the buoy. The water depth in the buoy is measured every 10 cm, and the top elevation of the buoy is measured at the same time. When the amount of water injected increases and the change in the top elevation of the buoy is much smaller than the change in the water depth, it is determined that the buoy has been seated on the bottom platform 1, and water injection is stopped at this time.

[0038] Step 6: Use the total station to measure the prisms 34 at the four corners of the bottom pier 30 on the pontoon 3, determine the plane position deviation of the pontoon 3, start a pair of longitudinal jacks 17 and two pairs of transverse jacks 18 on the bottom platform 1, fine-tune the plane position of the pontoon 3, and use the total station to synchronously re-measure until the error meets the specification requirements, and complete the precise positioning of the pontoon 3;

[0039] Step seven, after completing the pier body heightening process and the pier body and main beam connection process on the pontoon 3, first use a water pump to pump out the ballast water in the pontoon 3 to make the pontoon 3 float, and then use a tugboat to tow the pontoon together with the pier body and main beam on the pontoon away from the working area of the base platform.

[0040] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A method for positioning a pressure-bearing floating cylinder of a floating bridge on water, characterized in that, The positioning method includes the following steps: Step 1: Erect a bottom platform and a berthing pier. The bottom platform includes steel pipe piles driven into the seabed, a platform slab fixed on the top surfaces of the steel pipe piles, four platform limiting columns installed on the platform slab, and a planar fine-tuning mechanism. The steel pipe piles include left steel pipe piles, right steel pipe piles, and the first row to the sixth row of transverse steel pipe piles. Both the first row of transverse steel pipe piles and the sixth row of transverse steel pipe piles consist of two steel pipe piles, and the second row to the fifth row of transverse steel pipe piles each consist of three steel pipe piles. The platform slab includes a middle longitudinal distribution beam fixed between the top surfaces of the left steel pipe pile and the right steel pipe pile, two side longitudinal distribution beams respectively fixed at the front and rear of the second to fifth row of transverse steel pipe piles, a first short transverse distribution beam and a second short transverse distribution beam respectively fixed on the top surfaces of the first row of transverse steel pipe piles and the sixth row of transverse steel pipe piles, and a first long transverse distribution beam to a fourth long transverse distribution beam respectively fixed on the top surfaces of the second row of transverse steel pipe piles, the third row of transverse steel pipe piles, the fourth row of transverse steel pipe piles, and the fifth row of transverse steel pipe piles. The four platform limiting columns are respectively installed on the rear top surfaces of the first long transverse distribution beam to the fourth long transverse distribution beam, and a berthing column working platform is fixed on each of the four platform limiting columns. A platform winch is installed on each berthing column working platform. The planar fine-tuning mechanism includes a pair of longitudinal jacks respectively installed at both ends of the middle longitudinal distribution beam and two pairs of transverse jacks respectively installed at both ends of the first short transverse distribution beam and both ends of the second short transverse distribution beam. The berthing pier is arranged beside one end of the middle longitudinal distribution beam of the bottom platform and includes a berthing pier foundation fixed on the seabed, a berthing pier column fixed on the berthing pier foundation, and a berthing pier working platform installed on the berthing pier column. A berthing pier winch is installed on the berthing pier working platform. Step 2: Tow the floating drum near the bottom platform. Four side mooring rope piles, one end mooring rope pile, and a water pumping and injection port are arranged on the top surface of the floating drum. Prisms are respectively installed at the four corners of the bottom pier body at the center of the top surface of the floating drum. Step 3: First, respectively tie the steel wire ropes of the berthing pier winch and the four platform winches to the end mooring rope pile and the four side mooring rope piles on the floating drum. Then start the four platform winches to make the floating drum dock on the four platform limiting columns. Next, start the berthing pier winch to make one end of the floating drum closely adhere to the berthing pier column, completing the preliminary positioning of the floating drum. Step 4: Place a water pump on the floating drum and inject ballast water into the floating drum, and simultaneously loosen the steel wire ropes of the berthing pier winch and the four platform winches to make the floating drum sink. Step 5: Measure the elevation of the floating drum during the sinking process of the floating drum, calculate the water injection volume by measuring the water depth in the floating drum, and simultaneously measure the top elevation of the floating drum. When the water injection volume increases and the change amount of the top elevation of the floating drum is much smaller than the change in water depth, it is determined that the floating drum has landed on the bottom platform, and at this time, stop injecting water. Step 6: Use the total station to measure the prisms at the four corners of the bottom pier on the pontoon to determine the plane position deviation of the pontoon, start a pair of longitudinal jacks and two pairs of transverse jacks on the bottom platform, fine-tune the plane position of the pontoon, and use the total station to re-measure synchronously until the error meets the specification requirements to complete the precise positioning of the pontoon; Step seven, after carrying out the pier body heightening process and the pier body and main beam connection process on the pontoon, first use a water pump to pump out the ballast water in the pontoon to make the pontoon float, and then drag the pontoon together with the pier body and main beam on the pontoon away from the working area of the base platform.

2. The method for water positioning of the floating bridge pressure-bearing floating cylinder according to claim 1, characterized in that, When performing step one, transverse parallel connections are set between each row of transverse steel pipe piles, and longitudinal parallel connections are set between the first row of transverse steel pipe piles to the sixth row of transverse steel pipe piles; the transverse parallel connections are connected between the four platform limit columns; and a diagonal brace is set on the rear side of each platform limit column.

3. The method for water positioning of the pressure-bearing floating cylinder of the pontoon bridge according to claim 1, characterized in that, When performing step 1, the plane of the berthing pier foundation is a right triangle and includes three berthing pier steel pipe piles and a berthing pier foundation platform arranged on the top surface of the three berthing pier steel pipe piles; the berthing pier column is connected to a berthing pier steel pipe pile close to the middle longitudinal distribution beam, and a diagonal brace is arranged between the berthing pier column and the berthing pier foundation platform.

4. The method for positioning a floating bridge pressure-bearing floating cylinder on water according to claim 1, wherein, When performing step 5, the water depth in the float is measured every 10 cm.

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