CN1306131A - Platform for sinking combined simple turnnel pipe segments - Google Patents

Abstract

A combined simple tunnel pipe sinking platform. The main body of the platform is rigidly combined with four buoyant tanks and four universal beams, and the four legs are rigidly combined with universal standard rods. The floating box of the main body of the platform, the lifting system is composed of a winch fixed on the floating box, a steel cable, a fixed pulley block and a movable pulley block, and the movable pulley block is installed on the floating box or on the pile leg head. The vertical adjustment system and the horizontal adjustment system are used to control the process of pipe section sinking. The invention has the advantages of simple lifting equipment, low cost, easy control of the sinking and placing process, high positioning accuracy, little obstruction to navigation, and can be applied to tunnel pipe sections of different scales, and is also suitable for construction operations such as underwater foundation leveling.

Description

Combined simple tunnel pipe section sinking platform

The invention is a combined simple tunnel pipe segment sinking platform, which is applied to immersed tunnel engineering and belongs to the field of operation technology.

The immersed tube tunnel project is a large-scale water-crossing traffic project gradually developed at the beginning of this century. Submerge several prefabricated pipe sections one by one into the excavated underwater trench, and then supplement with related construction, so that the pipe section assembly becomes a tunnel-type transportation carrier connecting land traffic at both ends. This is the immersed tube tunnel The basic connotation of engineering.

Pipe section sinking is a key process in immersed tunnel engineering. At present, there are many kinds of immersed tube methods used in the world, among which there is the method of directly applying the self-elevating platform, which has the advantages of small interference, easy control, high precision of sinking, etc., and does not require mooring equipment, and occupies a small water area during construction. , can limit the obstruction to the minimum range. However, this kind of self-elevating platform has poor applicability due to the fixed and non-adjustable distance between the legs of the platform, and the electromechanical equipment and elevator structure of the platform are expensive, making a single immersed tube tunnel project unbearable. Therefore, so far, the use of jack-up platforms to sink pipe sections is limited to occasional use of offshore oil and gas development platforms for sinking. The document "Design and Analysis of Immersed Tunnel Segment Mooring and Sinking Engineering Vessel" (Zhou Yu, Tan Jiahua, "Engineering Ships Collection" September 2000, P89-94) introduces representative methods of sinking tunnel segments at home and abroad. The use of barges for sinking or floating lifting requires complex equipment and poor flexibility. At the same time, problems such as positioning and balance control of the sinking pipe section have not been effectively resolved.

The purpose of the present invention is to provide a new type of combined simple tunnel pipe segment sinking platform in view of the actual needs and the shortcomings of the above-mentioned prior art, so that it not only has the advantages of easy control of the sinking process and high positioning accuracy, but also has simple lifting equipment , low cost, wide range of applications.

In order to achieve such a goal, in the technical solution of the present invention, the designed platform for sinking the tunnel pipe section is a combined structure. The main body of the platform is rigidly combined with four buoyant boxes and four universal rod composite beams. The buoyant boxes can provide buoyancy. , is also the carrier of other equipment. The composite beam is composed of universal standard rods used in the construction of bridges and culverts, so the main body of the platform can be disassembled and assembled according to needs. The required universal rods can be rented from the manufacturer or related companies, and The distance between the pontoons can also be adjusted as required. The main body of the platform can be assembled at the construction site, or can be dragged to the site after assembly.

The four pile legs are rigidly combined by universal standard rods and can be disassembled, and their length can be adjusted according to water depth and other needs. The leg head at the upper end of the leg is specially made according to the needs, and it is provided with bolt holes and the like connected with the movable pulley block seat. The main function of the spud boots at the lower part of the legs is to transmit the force of the legs to the foundation, and at the same time serve as a carrier for fixing the pulley blocks in the lifting system. A certain length of the lower part of the pile leg and the pile shoe are pre-installed before the platform is assembled, and are reliably connected with the buoyancy tank.

The lifting system consists of a moving pulley block, a winch, a fixed pulley block and a lifting cable, and there are eight sets in total. There are eight mobile pulley block seats, which are successively installed on the buoy box of the platform main body and on the pile leg heads during construction. When the main body of the platform is floating on the water surface to assemble and lift the legs, the moving pulley block is fixed to the main body of the platform with screws. When the four legs are assembled and lowered to the point where the spud shoes contact the foundation, the main body of the platform needs to be lifted out of the water. , then remove the connection between the moving pulley block and the main body of the platform, and fix the moving pulley block with screws and the leg heads. The fixed pulley blocks are fixed on the spud shoes at the bottom of the pile legs, and there are eight pieces in total. The winches are fixed on the buoyancy tank and are used for lifting the legs or the main body of the platform. There are eight winches in total.

When the movable pulley block and the pontoon are fixed, the pontoon floats on the water surface, and a winch can be used to control the lifting of the legs. When the spud boots touch the ground, the movable pulley block and the leg head are fixed, and the winch can be used to control the lifting of the main body of the platform. .

There are four sets of suspension system, longitudinal adjustment system and lateral adjustment system, mainly composed of winches fixed on the buoyancy tank, steel cables and pulley blocks fixed on the buoyancy tank and the tunnel pipe section. The main function of the suspension system is to control the lifting of the tunnel pipe section. The main function of the longitudinal adjustment system is to correct the vertical deviation when the longitudinal position of the tunnel pipe section deviates. Perform lateral correction.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a side view of the structure of the present invention.

Fig. 3 is a top view of the structure of the present invention.

Fig. 4 is a schematic structural diagram of the movable pulley block in the present invention.

Fig. 5 is a schematic diagram of the trend of the movable pulley block steel cable.

As shown in Fig. 1, Fig. 2 and Fig. 3, the tunnel pipe section sinking platform of the present invention is a combined structure. The composite beam 2 can be disassembled as required, and the distance between the floating tanks 1 can be adjusted by adjusting the length of the composite beam 2 . The four legs 4 are rigidly combined by universal standard rods, which can be disassembled. The length can be adjusted by increasing or decreasing the assembly of universal rods according to the water depth or other needs. The leg head 3 at the upper end of the legs 4 wears Pass the buoyancy box 1 of platform main body.

There are eight sets of lifting systems, two sets are installed on each buoyancy box and each pile leg, and each set consists of a winch 7 fixed on the buoyancy box, a steel cable 8, a fixed pulley block 9 on the spud shoe and a movable pulley block 6 composition. After the main body of the platform is assembled and dragged to the site, when the legs are to be lengthened and lowered, the connection between the legs and the buoyancy box is removed, the movable pulley block 6 is installed on the buoyancy box, and the legs are lengthened for a period with a universal rod , put the pile leg down to a certain depth with a winch, then increase the length of the pile leg, and lower it again until the pile leg is put down to a predetermined depth, then load onto the pile leg head 3. Finally, remove the connection of the movable block block 6 and the floating box, and install the movable block block 6 on the leg head 3, and start the winch to lift the floating block away from the water surface, so that the assembly of the platform is completed. The cable trend of the lifting system is shown in Figure 5.

Suspension winch 10 is connected with tunnel pipe section 16 by suspension steel cable 11, constitutes suspension system, totally four sets, and its main function is to control the lifting of tunnel pipe section. The longitudinal adjustment winch 12 is connected with the tunnel pipe section 16 through the longitudinal adjustment steel cable 13 to form a longitudinal adjustment system, and there are four sets in total. The horizontal adjustment winch 14 is connected with the tunnel pipe section 16 through the horizontal adjustment steel cable 15 to form a lateral adjustment system. There are four sets in total.

The invention adopts a combined simple tunnel pipe section sinking platform to carry out the tunnel pipe section sinking construction, which makes the pipe section sinking process easy to control, has high positioning accuracy, small obstruction to navigation, can be applied to tunnel pipe sections of different scales, and has simple lifting equipment. In addition, there is no need for other mechanical and electrical equipment, and the power supply is supplied by shore power or other ships, and the cost is low.

Due to the large number of rivers and islands in our country, with the development of the national economy, our country will become one of the main countries in the construction of underwater tunnels. The construction of immersed tube tunnels will form an industry in our country just like bridges. The combined simple tunnel pipe section sinking platform proposed by the present invention may become a major special equipment in the construction of immersed tunnels and is widely used. The invention is also applicable to construction operations such as underwater foundation leveling.

Claims (1)

1. A combined simple tunnel pipe sinking platform is characterized in that the main body of the platform is rigidly combined with four buoys (1) and four universal beams (2), and the four legs (4) are composed of The universal standard bar is rigidly combined, the leg head (3) passes through the buoyancy box (1) of the main body of the platform, and the lifting system consists of a winch (7), a steel cable (8) fixed on the buoyancy box, a fixed pulley block ( 9) and a movable pulley block (6), the movable pulley block (6) is installed on the buoy (1) or the leg head (3), and the suspension winch (10) passes the suspension steel cable (11) and The tunnel pipe sections (16) are connected to form a suspension system. The longitudinal adjustment winch (12) is connected to the tunnel pipe section (16) through the longitudinal adjustment steel cable (13) to form a longitudinal adjustment system. The horizontal adjustment winch (14) is (15) links to each other with tunnel section (16), constitutes lateral adjustment system.

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