Double-floating-body auxiliary mounting structure of oversized circular caisson pier

Abstract

The utility model discloses a double-floating-body auxiliary mounting structure of a super-large circular caisson pier, and relates to the technical field of deepwater bridge construction. Comprising two concave floating bodies, openings of the floating bodies are opposite, the floating bodies are arranged on the two sides of a lower tower column of the oversized circular caisson pier in an axial symmetry mode, and locking devices, positioning devices, holding devices and lifting devices are fixedly connected to the floating bodies; the locking device is located at the joint of the two floating bodies and used for combining and separating the two floating bodies. The positioning device is located at the corner of the floating body and connected with the anchorage system arranged on the periphery of the floating body in advance through a mooring rope. The enclasping device is located at the opening of the floating body, and the inner surface of the enclasping device is attached to the surface of the lower tower column; and the lifting device is positioned between the positioning device and the holding device, and is connected with a main lifting point embedded part which is pre-arranged on a caisson foundation of the ultra-large circular caisson pier through a mooring rope. Generally, by means of the construction method, the caisson pier is good in installation stability and convenient and safe to construct.

Description

TECHNICAL FIELD

[0001] The utility model relates to deep water bridge construction technical field, concretely relates to a double floater auxiliary installation structure of super large round caisson pier. BACKGROUND

[0002] Caisson pier structure is an important basic mechanism in deep water bridge construction. Caisson pier structure refers to that the pier enlarged foundation is large-diameter caisson structure, the lower tower column is conical frame gradually transitioned from bottom to upper end, the lower tower column is integrally prefabricated with the caisson structure, and the upper half part of underwater foundation is formed, and it is generally used for large bridge in high seismic risk region, such as the main pier of cable-stayed bridge or suspension bridge.

[0003] At present, the round caisson of general offshore independent pier is mostly installed in the mode of crane ship and positioning barge assistance, after the preliminary positioning of the caisson, water injection is started to sink, so that the load of the crane ship is gradually increased, when the load reaches the required range, the main hook is slowly loosened under the guidance of the measurement system, and the caisson is lowered. With the continuous sinking of the caisson, the increase of the drainage volume and the increase of the water injection volume in the caisson are basically balanced, and the load of the crane ship is kept in the required range. When approaching the bed, stop water injection in the caisson, the load of the crane ship is reduced, until the caisson is completely bedded, and the installation precision is guaranteed within the quality standard range. Although the method of installing the caisson by the crane ship assistance can improve the installation efficiency and stability of the caisson to a certain extent, it has high operation technical requirements, may be affected by weather and sea conditions, and has relatively high cost.

[0004] And for the caisson pier structure used in deep water bridge construction, the scale of the caisson reaches tens of thousands of tons or even more than one hundred thousand tons, the caisson draft and water resistance area are very large, and the sea conditions are complex, so that the flow force and the wind wave horizontal load are large, and the positioning control is difficult. At the same time, the caisson pier is round, and it is easy to rotate in the positioning of the on-site tugboat, which increases the difficulty of control, and the traditional construction method of independent pier round caisson is difficult to meet the construction requirements of caisson posture and position control. UTILITY MODEL CONTENTS

[0005] The utility model aims at the technical problem that the prior art method is difficult to meet the construction of deep water bridge caisson pier, and provides a double floater auxiliary installation structure of super large round caisson pier.

[0006] In order to achieve the above object, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of double floater auxiliary installation structure of super large circular caisson pier, it is characterized by including two concave floater, the floater opening is opposite, it is arranged in the lower tower column of super large circular caisson pier two sides with axial symmetry, locking device, positioning device, embrace device and lifting device are fixedly connected on the floater;The locking device is located at the junction of two floater, for the combination and separation of two floater;The positioning device is located at the corner of floater, is connected through cable the anchor system that is arranged in advance around floater;The embrace device is located at the opening of floater, its inner surface is attached to the surface of lower tower column;The lifting device is located between positioning device and embrace device, is connected through cable the main lifting point embedded part that is preset on the caisson foundation of super large circular caisson pier.

[0008] The main body material of the floater is steel.

[0009] The positioning device includes positioning electric winch and cable guide roller.

[0010] The embrace device includes embrace frame, hydraulic embrace ring, cable tie point, flexible cable and hand-operated hoist.

[0011] The lifting device includes pulley block hanger and hydraulic winch.

[0012] The structure is suitable for super large circular caisson pier, wherein the pier expansion foundation is a caisson structure with a diameter of 90 m or more, the lower tower column is a conical frame gradually transitioning from the bottom to the upper end, and the lower tower column and the caisson structure are integrally prefabricated.

[0013] The utility model discloses a construction structure, and a tugboat can be dragged on both sides of the double floater, solving the problem of circular caisson tugboat rotation; the longitudinal and transverse adjustment systems can be converted, solving the problem of large horizontal stress of the caisson pier; the caisson pier is precisely positioned, and the elevation deviation of the caisson pier around can be completely controlled by the double floater lifting device; if the installation quality does not meet the standard, the floater lifting device can be controlled to make the caisson pier float, and the installation can be adjusted again. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is the plan view of the construction effect of the double floating body auxiliary installation super-large circular caisson pier of the utility model.

[0015] Figure 2 is the left view of the construction effect of the double floating body auxiliary installation super-large circular caisson pier of the utility model.

[0016] Figure 3 is the plan view of the construction effect of the double floating body auxiliary installation super-large circular caisson pier of the utility model in a more ideal state.

[0017] Figure 4 is the schematic diagram of the holding device between the double floating body and the super-large circular caisson pier of the utility model. DETAILED DESCRIPTION

[0018] The utility model will be further explained in detail in combination with the drawings and specific embodiments. Embodiment 1

[0019] As Figure 1 , Figure 2 , Figure 3 , Figure 4 indicated, a kind of double floating body auxiliary installation structure of super-large circular caisson pier, including two concave floating bodies 1, the floating body 1 opening is opposite, it is arranged in the lower tower column of super-large circular caisson pier 6 two sides with axial symmetry, the floating body 1 is fixedly connected locking device 2, positioning device 3, holding device 4 and lifting device 5;The locking device 2 is located at the junction of two floating bodies 1, for the combination and separation of two floating bodies 1;Positioning device 3 is located at the angle of floating body, is connected through cable the anchor system that is arranged in advance around floating body;The holding device 4 is located at the opening of floating body 1, its inner surface and lower tower column surface are attached;Lifting device 5 is located between positioning device 3 and holding device 4, is connected through cable the main lifting point pre-embedded piece 8 that is preset in the caisson foundation of super-large circular caisson pier 6.

[0020] The main body material of the floating body 1 is steel.

[0021] Positioning device 3 includes positioning electric winch, cable guide roller, and the anchor system that is arranged in advance around floating body is connected after the cable of positioning electric winch passes through cable guide roller.

[0022] The embracing device 4 comprises an embracing frame 4-1, a hydraulic embracing ring 4-2, a cable tie point and a flexible cable 4-3, and a hand-operated hoist 4-4. The embracing frame 4-1 is arranged and processed according to the gap between the floating body and the lower tower column, is fixed at the opening of the floating body, and is provided with the hydraulic embracing ring 4-2, which is controlled to move by a hydraulic system, and the inner surface of the embracing frame 4-1 is in close contact with the surface of the lower tower column. The cable tie point is connected with the lower tower column embedded part through the flexible cable 4-3, and is fixed by the hand-operated hoist 4-4. The cable tie point is arranged on the upper side and the lower side of the embracing frame 4-1 respectively.

[0023] The lifting device 5 comprises a pulley block hanger and a hydraulic winch. The rope of the hydraulic winch passes through the pulley block hanger, is connected with the main hoisting point embedded part prearranged on the super-large circular caisson pier caisson foundation, and is used for controlling the vertical displacement of the caisson pier 6.

[0024] The structure is suitable for the super-large circular caisson pier, that is, the pier enlarged foundation is a caisson structure with a diameter of 90 m or more, the lower tower column is a conical frame gradually transitioning from the bottom to the upper end, and the lower tower column and the caisson structure are integrally prefabricated. Embodiment 2

[0025] As shown in Figure 1 , Figure 2 , Figure 4 A construction method of a double floating body auxiliary installation structure adopting the super-large circular caisson pier in the embodiment 1 comprises the following steps:

[0026] S1: Double floating body 1 outfitting. The longitudinal and transverse adjustment system 7 of the caisson pier 6 is arranged at the high-preparation site, the double floating body 1 is combined in place through the locking device 2, the embracing device 4 on the floating body is embraced with the caisson pier 6, and the lifting device 5 is connected with the main hoisting point embedded part 8 on the caisson;

[0027] S2: Coarse positioning of the caisson pier 6. The caisson pier is towed to the installation position by a tugboat, the tugboat is changed to be beside the double floating body 1, the positioning device 3 on the double floating body is connected with the anchor system 9 on both sides, the positioning device 3 is started, and the tugboat is used for auxiliary braking to control the preliminary position of the caisson pier 6;

[0028] S3: Conversion of the longitudinal and transverse adjustment system. The longitudinal and transverse adjustment system 7 on the caisson pier is connected and locked with the anchor system 9 on both sides, the embracing device 4 between the double floating body 1 and the caisson pier 6 is loosened, and the conversion of the longitudinal and transverse adjustment system is completed;

[0029] S4: Load of the double floating body lifting device 5. The load of the double floating body lifting device 5 is controlled in the lifting device capacity range by injecting water into the cabin of the caisson pier 6;

[0030] S5: Lowering the caisson pier 6. Slowly loosen the floating body lifting device 5, and ensure that the increase of the drainage volume is balanced with the increase of the water injection volume in the box;

[0031] S6: Precise positioning of the caisson pier 6. At the position of 50 cm between the caisson pier 6 and the base, stop the water injection of the caisson pier, control the plane position by using the longitudinal and transverse adjustment system 7 on the caisson pier, and control the elevation deviation around the caisson pier 6 by using the double floating body lifting device 5;

[0032] S7: Bedding of the caisson pier 6. Completely lower by using the double floating body lifting device 5 until the caisson pier 6 is bedded;

[0033] S8: Acceptance and readjustment of the caisson pier 6. After the caisson pier 6 is bedded, the plane position is re-measured, and if it does not meet the quality standard requirements, the floating body lifting device 5 is controlled to make the caisson pier 6 float by 50 cm, and the steps S6 and S7 are repeated to adjust the installation until the quality requirements are met;

[0034] S9: Separation of the double floating body 1. Release all the cables between the double floating body 1 and the caisson pier 6, release the locking device 2 of the double floating body 1, separate the double floating body, recover the corresponding equipment, and complete the installation.

[0035] In the steps S2 and S3, the anchorage system is arranged along the longitudinal direction of the bridge and outwardly in the range of 20-30 m on both sides of the caisson pier, and the longitudinal spacing is 70-80 m, so that the angle between the connecting rope of the positioning device on the double floating body and the longitudinal axis of the bridge is in the range of 30-60°, the angle between the connecting rope of the longitudinal adjustment system on the caisson pier and the longitudinal axis of the bridge is in the range of 15-45°, and the angle between the connecting rope of the transverse adjustment system on the caisson pier and the longitudinal axis of the bridge is in the range of 60-90°.

[0036] In the step S4, the water injection rate ensures that the sinking speed of the caisson pier is not greater than 0.1 m / min.

[0037] In the step S6, the axis deviation of the controlled plane position is ±50 mm, and the elevation deviation around the caisson pier is ±50 mm.

[0038] In the step S8, after the caisson pier is bedded, if the installation quality does not meet the standard, the floating body lifting device can be controlled to make the caisson pier float by 50 cm, the height deviation is ±100 mm, and the installation is re-adjusted. Example 3

[0039] As Figure 1 , Figure 3 , Figure 4As shown, in a relatively ideal scenario, the sea conditions in the construction area are good. By selecting a suitable meteorological window, the wind is below force 5 (less than 8 m / s), the wave height is less than 1 m, the water flow velocity is less than 0.3 m / s, and the water flow force and wind and wave horizontal loads are negligible. The construction method for installing ultra-large circular caisson bridge piers with dual floating bodies in Example 1 can be simplified, including the following steps:

[0040] S1': Outfitting of the double floating body 1. At the prefabrication yard connected to the caisson pier 6, the double floating body 1 is positioned and assembled by locking device 2. The clamping device 4 on the floating body clamps with the caisson pier 6, and the lifting device 5 is connected to the embedded part 8 of the main lifting point on the caisson.

[0041] S2': Coarse positioning of caisson pier 6. The tugboat tows the caisson pier to the installation position, then tows it alongside the two floating bodies 1. The positioning device 3 on the two floating bodies is connected to the anchorage system 9 on both sides. The positioning device 3 is activated, and the tugboat provides auxiliary braking to control the initial position of the caisson pier 6.

[0042] S3': Loosen the clamping device 4. Loosen the hand-operated hoist 4-4 of the clamping device 4 between the double float 1 and the caisson pier 6, release the connection between the flexible mooring cable 4-3 and the embedded part of the lower tower column, and control the movement of the hydraulic clamping ring 4-2 through the hydraulic system so that the gap between the inner surface of the hydraulic clamping ring 4-2 and the surface of the lower tower column of the caisson pier 6 is within the range of 3~5cm;

[0043] S4': Load on the dual-buoy lifting device 5. The dual-buoy lifting device 5 is loaded by injecting water into the caisson pier compartment 6, and the load is controlled within the lifting device's capacity.

[0044] S5': Lower the caisson pier 6. Slowly release the floating body lifting device 5 to ensure that the increase in drainage volume is balanced with the increase in water volume inside the caisson;

[0045] S6': Precision positioning of caisson pier 6. When the caisson pier 6 is 50cm away from the foundation bed, stop water injection into the caisson pier. Use the double floating body lifting device 5 to control the elevation deviation around the caisson pier 6. Then, use the hydraulic system on the clamping device 4 to control the movement of the hydraulic clamping ring 4-2 so that the inner surface of the hydraulic clamping ring 4-2 is in close contact with the surface of the lower tower column of the caisson pier 6. Use the positioning device 3 on the double floating body to control the planar position.

[0046] S7': The caisson pier 6 is lowered. The hydraulic clamping ring 4-2 is moved by controlling the hydraulic system on the clamping device 4, so that the gap between the inner surface of the hydraulic clamping ring 4-2 and the lower tower column surface of the caisson pier 6 is within 1~3cm. The caisson pier 6 is lowered by fully utilizing the double floating body lifting device 5 until it is lowered.

[0047] S8': caisson pier 6 acceptance, re-tuning. After the caisson pier 6 bedded, re-measure the plane position, if not in line with the quality standards, control the floating body lifting device 5, so that the caisson pier 6 float 50 cm, repeat steps S6', S7' adjustment installation, until in line with the quality requirements;

[0048] S9': double floating body separation. Release all the cables of the double floating body 1 and the caisson pier 6, release the double floating body 1 locking device 2, so that the double floating body is separated, the corresponding equipment is recovered, and the installation is completed.

[0049] In the step S2', the anchorage system is arranged along the longitudinal direction of the bridge outside the caisson pier to 20-30m, and the longitudinal spacing is 200-250m, which ensures that the angle between the connecting rope of the positioning device on the double floating body and the longitudinal axis of the bridge is in the range of 30-60°.

[0050] In the step S4', the water injection ensures that the sinking speed of the caisson pier is not greater than 0.1m / min.

[0051] In the step S6', the control plane position axis deviation is ±50mm, and the control caisson pier four around elevation deviation is ±50mm.

[0052] In the step S8', after the caisson pier is bedded, if it does not meet the installation quality standard, the floating body lifting device can be controlled to make the caisson pier float 50cm, the height deviation is ±100mm, and the installation is adjusted again.

[0053] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A double floater assisted installation structure for an ultra-large circular caisson pier, characterized by: The application relates to a structure suitable for a super-large circular caisson pier, which comprises two concave floating bodies, the floating bodies are arranged on two sides of a lower tower column of the super-large circular caisson pier in an axis-symmetrical mode, the floating bodies are fixedly connected with locking devices, positioning devices, holding devices and lifting devices; the locking devices are located at the connection positions of the two floating bodies and are used for combining and separating the two floating bodies; the positioning devices are located at the corners of the floating bodies and are connected with anchor systems arranged around the floating bodies in advance through cables; the holding devices are located at the openings of the floating bodies and are matched with the surfaces of the lower tower columns; and the lifting devices are located between the positioning devices and the holding devices and are connected with main lifting point embedded members of a caisson foundation of the super-large circular caisson pier through cables.

2. The double floating body auxiliary installation structure of an ultra-large circular caisson pier according to claim 1, characterized in that: The main body material of the floating body is steel.

3. The double floating body assisted installation structure of an ultra-large circular caisson pier according to claim 1, characterized in that: The positioning devices comprise positioning electric winches and cable guide rollers, the cable of the positioning electric winches is connected with the anchor systems arranged around the floating bodies in advance through the cable guide rollers.

4. The double buoyancy aided installation structure of an ultra-large circular caisson pier according to claim 1, characterized in that: The holding devices comprise holding frames, hydraulic holding rings, cable connection points, flexible cables and hand-operated hoists, the holding frames are arranged according to the gaps between the floating bodies and the lower tower columns, are fixed at the openings of the floating bodies, are provided with the hydraulic holding rings which are controlled to move through a hydraulic system and are matched with the surfaces of the lower tower columns, the cable connection points are connected with the embedded members of the lower tower columns through the flexible cables and are fixed by the hand-operated hoists.

5. The double buoyancy aided installation structure of an ultra-large circular caisson pier according to claim 1, characterized in that: The lifting devices comprise pulley block hangers and hydraulic winches, the cable of the hydraulic winches is connected with the main lifting point embedded members of the caisson foundation of the super-large circular caisson pier through the pulley block hangers, the center of a rectangle formed by four pulley block hanger positions is coincident with the plumb line of the center of gravity of the caisson pier, and the lifting devices are used for controlling the vertical displacement of the caisson pier.

6. The double floating body auxiliary installation structure of an ultra-large circular caisson pier according to any one of claims 1 to 5, characterized in that: The structure is suitable for the super-large circular caisson pier, the expanded foundation of the pier is a caisson structure with a diameter of 90m or above, the lower tower column is a conical frame which is gradually transitioned from the bottom to the upper end, and the lower tower column and the caisson structure are integrally prefabricated.

Images