A construction method for barges and immersed tunnels that integrates the leveling of the crushed stone foundation and the installation of the immersed tunnel section.

Abstract

This application relates to a barge and a construction method for an immersed tunnel that integrates the leveling of a crushed stone foundation and the sinking of immersed tunnel sections, and belongs to the technical field of immersed tunnel construction. The integrated barge includes a hull, a leveling device, and an immersed tunnel section suspension device. The hull includes two floats and two transverse beams. The space located below the transverse beams, between the two floats, is used to house the immersed tunnel sections. The hollow area surrounded by the two floats and two transverse beams constitutes a moonpool. The leveling device includes a large vehicle, a small vehicle, and a leveling execution mechanism. The leveling execution mechanism is switched between an working state and a non-working state by inverting in a plane perpendicular to the large vehicle via the small vehicle. The immersed tunnel section suspension device is used to connect the immersed tunnel sections in the space located below the transverse beams and to control the sinking of the immersed tunnel sections. This integrated barge combines the functions of leveling the crushed stone foundation and sinking the immersed tunnel section into a single unit, effectively reducing the number of vessels required at the immersed tunnel construction site, thereby increasing construction efficiency and lowering construction costs.

Claims

1. In a barge that integrates the leveling of the crushed stone foundation and the installation of the immersed tunnel section, With the long side as the vertical direction, two floats are installed side by side horizontally, It includes two transverse beams that are installed between the two floats along the transverse direction, each located at the longitudinal ends of the floats, The space located below the transverse beam and between the two floats is used to house the immersed tunnel section, and the hollow region surrounded by the two floats and the two transverse beams constitutes a moonpool in the hull. A large traveling vehicle is installed between the two floats along the transverse direction and located above the moonpool, and moves relative to the floats between the two transverse girders along the longitudinal direction, A small vehicle is connected to a large vehicle, moves along the large vehicle, and reverses direction in a plane perpendicular to the large vehicle. It includes a ground leveling mechanism used for leveling foundations, which is attached to the small vehicle and can be raised and lowered relative to the small vehicle, The aforementioned ground leveling mechanism switches between working and non-working states by inverting in a vertical plane relative to the large vehicle via the small vehicle. When in working state, the ground leveling mechanism is installed vertically and performs ground leveling work, and when in non-working state, the ground leveling mechanism inverts to above the moonpool. The present invention is characterized by including a burial tunnel suspension device installed on two of the transverse beams, used to connect the burial tunnels in the space located below the transverse beams, and to control the burial of the burial tunnels, A barge that integrates the leveling of the crushed stone foundation with the installation of the immersed tunnel section.

2. A barge integrating the leveling of a crushed stone foundation and the installation of a submerged tunnel section, as described in claim 1, characterized in that a first reversal position is provided in the portion of the large vehicle located directly above the moonpool, the leveling execution mechanism reverses relative to the large vehicle at the first reversal position via the small vehicle, and when the leveling execution mechanism switches to a working state at the first reversal position, the leveling execution mechanism penetrates the moonpool and performs leveling work on the foundation within the area surrounded by the moonpool.

3. A barge integrating the leveling of a crushed stone foundation and the installation of a submerged tunnel section, characterized in that one end of the large vehicle extends outside the moonpool, a second reversal position is provided in the portion of the large vehicle extending from the moonpool, the leveling execution mechanism reverses relative to the large vehicle at the second reversal position via the small vehicle, and when the leveling execution mechanism switches to a working state at the second reversal position, the leveling execution mechanism is located outside the moonpool and performs leveling work on the foundation outside the area enclosed by the moonpool.

4. The large track vehicle includes two track girders installed opposite each other, and a first track extending laterally is provided on the opposing sides of the two track girders, and small track wheels are provided on both sides of the small track vehicle, each of which is rotatably connected to the two first tracks, and there are two small track wheels rotatably connected to each first track, which are a first small track wheel and a second small track wheel, and a position-limiting assembly that restricts the first small track wheel to the first or second inversion position is detachably connected to the portion of each track girder corresponding to the first inversion position and / or the second inversion position. A barge integrating the leveling of a crushed stone foundation and the installation of a submerged tunnel, as described in claim 2 or 3, wherein a notch is provided in the portion of each track girder corresponding to the first reversal position and / or the second reversal position for the second small track wheel to move out of the first track, the notch is located above the first track and is in communication with the first track, and when the small vehicle reverses, the unrestricted second small track wheel passes through the notch as the small vehicle reverses, with the wheel axle of the first small track wheel restricted by the position restricting assembly as its axis.

5. A barge integrating the leveling of a crushed stone foundation and the installation of a submerged tunnel, as described in claim 4, further comprising a drive mechanism for driving the reversal of the leveling execution mechanism, the drive mechanism comprising a first hoisting machine installed on the large vehicle and a first traction rope connected between the first hoisting machine and the top of the leveling execution mechanism, wherein the first hoisting machine slackens the first traction rope to reverse the leveling execution mechanism and the small vehicle, thereby switching the leveling execution mechanism between a working state and a non-working state.

6. The barge for integrating the leveling of a crushed stone foundation and the sinking of a immersed tunnel, as described in claim 5, further comprising a reaction force frame connected to the large traveling vehicle, wherein the first towing rope is wrapped around the reaction force frame from below.

7. A barge integrating the leveling of a crushed stone foundation and the installation of a submerged tunnel section, as described in claim 6, characterized in that the first hoisting machine is installed at one end of the large traveling vehicle that is farther from the second reversal position, the reaction force frame is movable along the large traveling vehicle, when the leveling execution mechanism is reversed at the first reversal position the reaction force frame is limited to the portion close to the first hoisting machine, and when the leveling execution mechanism is reversed at the second reversal position the reaction force frame is limited to the first reversal position.

8. The mechanism drive mechanism is further used to drive the leveling execution mechanism to move it from the first reversal position to the second reversal position, and the drive mechanism further includes a first towing wheel installed at the lateral end of the large vehicle near the second reversal position, and when the drive mechanism is used to drive the movement of the leveling execution mechanism, one end of the first towing rope furthest from the first hoisting machine is wrapped around the first towing wheel and connected to the side of the small vehicle away from the first hoisting machine, and the first hoisting machine winds up the first towing rope, thereby moving the leveling execution mechanism and the small vehicle along the large vehicle from the first reversal position to the second reversal position, characterized in that a barge integrating leveling of a crushed stone foundation and sinking of a immersed tunnel is provided according to claim 5.

9. A barge integrating the leveling of a crushed stone foundation and the installation of a submerged tunnel, as described in claim 1, characterized in that the float is detachably connected to the transverse beam, and when the float is detached from the transverse beam, the leveling device and the two transverse beams are detachably connected to form a composite, within the composite, the leveling device is located between the two transverse beams, and within the leveling device, the leveling execution mechanism is reversed to a non-working state.

10. The float includes transverse girder connection portions located at both longitudinal ends and a support portion connected between the two transverse girder connection portions, and both ends of the transverse girder are provided with overlapping connection portions for overlapping connection with the two transverse girder connection portions at the corresponding ends of the two floats, the overlapping connection portions are detachably connected to the transverse girder connection portions, the support portion is provided with a second track and a third track extending in the longitudinal direction, a transverse girder movement support member is slidably connected on the second track, the transverse girder movement support members of the two floats are used to support the transverse girder when the overlapping connection portions of the transverse girder are not overlapping connection with the transverse girder connection portions of the floats, and to move the transverse girder supported by them along the longitudinal direction, and a large track wheel is provided at the bottom of the large vehicle that is aligned with the third track, and the large track wheel is connected to the bottom of the large vehicle by a lifting member, characterized in that the barge integrates the leveling of a crushed stone foundation and the sinking of a immersed tunnel.

11. The structure further includes a transverse beam moving mechanism, the two floats having first and second ends in their longitudinal directions, the transverse beam closer to the first end of the float is the first transverse beam, and the transverse beam closer to the second end of the float is the second transverse beam, the transverse beam moving mechanism is used to move the second transverse beam to the second end of the float after the composite structure has been separated when supporting the composite structure between the first ends of the two floats, and a set of the transverse beams is provided between the second ends of the two floats and the second transverse beam. A barge that integrates leveling of a crushed stone foundation and sinking of a immersed tunnel, as described in claim 9, characterized in that a transverse beam moving mechanism is provided, each of the transverse beam moving mechanisms includes a second towing wheel, a transverse beam moving winch, and a second towing rope, the second towing wheel being installed at the second end of the float, the transverse beam moving winch being installed on the second transverse beam, one end of the second towing rope being connected to the transverse beam moving winch, and the other end of the second towing rope being wrapped around the second towing wheel and connected to the second transverse beam.

12. The barge for integrating the leveling of a crushed stone foundation and the installation of an immersed tunnel, as described in claim 1, wherein the immersed tunnel suspension device includes a plurality of dropping winches and a plurality of mounting winches arranged on two crossbeams, the dropping winches are connected to dropping cables for dropping the immersed tunnel, and the mounting winches are connected to mounting cables for adjusting the position and angle of the immersed tunnel.

13. In a construction method for an immersed tunnel, the construction is carried out using a barge that integrates the leveling of the crushed stone foundation and the sinking of the immersed tunnel section as described in any one of claims 1 to 12, and the construction method includes crushed stone foundation leveling work and immersed tunnel section sinking work. The crushed stone foundation leveling work includes the following steps: the leveling execution mechanism reverses relative to the large vehicle via the small vehicle to switch to the working state; the working position of the leveling execution mechanism is adjusted by the vertical movement of the large vehicle relative to the float and the movement of the small vehicle along the large vehicle; and leveling work is performed on the crushed stone foundation. The immersed tunnel installation work is characterized by the following steps: the leveling execution mechanism switches to the non-working state by reversing relative to the large vehicle via the small vehicle; the immersed tunnel suspension device connects the undropped immersed tunnel to the space located below the crossbeam, between the two floats; the immersed tunnel suspension device drops the immersed tunnel; and the position and angle of the immersed tunnel are adjusted to complete the installation of the immersed tunnel. Construction methods for immersed tunnels.

14. A first reversal position is provided in the portion of the large vehicle located directly above the moonpool, and the crushed stone foundation leveling work includes leveling steps for the foundation within the area surrounded by the moonpool. The small vehicle moves the ground leveling execution mechanism, which is in a non-working state, to a first reversal position, the ground leveling execution mechanism switches to the working state by reversing relative to the large vehicle at the first reversal position via the small vehicle, and the working position of the ground leveling execution mechanism is adjusted by the movement of the large vehicle along the longitudinal direction relative to the hull and the movement of the small vehicle along the large vehicle, and ground leveling work is performed on the foundation within the area enclosed by the moonpool. The method for constructing an immersed tunnel according to claim 13.

15. One end of the large vehicle extends outside the moonpool, and a second reversal position is provided in the portion of the large vehicle extending outside the moonpool, and the crushed stone foundation leveling work further includes leveling work steps for the foundation outside the area enclosed by the moonpool, The small vehicle moves the ground leveling execution mechanism, which is in a non-working state, to the second reversal position, the ground leveling execution mechanism switches to the working state by reversing relative to the large vehicle at the second reversal position via the small vehicle, and the working position of the ground leveling execution mechanism is adjusted by the movement of the large vehicle along the longitudinal direction relative to the hull, thereby performing ground leveling work on the foundation outside the area enclosed by the moonpool. The method for constructing an immersed tunnel according to claim 14.

16. In the barge that integrates the leveling of the crushed stone foundation and the sinking of the immersed tunnel, the large traveling vehicle includes two opposing track girders, each of which has a first track extending laterally along its opposing sides, and each of the small traveling vehicle has small track wheels that are rotatably connected to the two first tracks, and the barge that integrates the leveling of the crushed stone foundation and the sinking of the immersed tunnel further includes a drive mechanism that drives the reversal of the leveling execution mechanism, the drive mechanism includes a first hoisting machine installed on the large traveling vehicle and a first traction rope connected between the first hoisting machine and the top of the leveling execution mechanism, The construction method further includes a method for inverting the leveling mechanism, the inversion method including a method for inverting the leveling mechanism from a non-working state to a working state, and a method for inverting the mechanism from a working state to a non-working state. The method for reversing from a non-working state to a working state includes the step of the first hoisting machine loosening the first towing rope, and under the gravitational action of the leveling mechanism, the leveling mechanism and the small vehicle invert in a plane perpendicular to the large vehicle until the leveling mechanism is vertical, with the wheel axle of the small track wheels as the axis, thereby entering the working state. The method for reversing from an operating state to a non-operating state is characterized by including the step of the first hoisting machine winding up the first towing rope, and under the action of the tensile force of the first towing rope, the leveling execution mechanism and the small vehicle reversing in a plane perpendicular to the large vehicle, with the wheel axle of the small track wheels as the axis, until the leveling execution mechanism is reversed to above the moonpool, thereby entering the non-operating state. A method for constructing an immersed tunnel according to claim 13.

17. In the barge that integrates the leveling of the crushed stone foundation and the sinking of the immersed tunnel section, the float and the transverse beam are detachably connected, and when the float and the transverse beam are separated, the leveling device and the two transverse beams are detachably connected to form a composite, within the composite, the leveling device is located between the two transverse beams, and within the leveling device, the leveling execution mechanism is inverted to a non-working state, the float includes transverse beam connection parts located at both longitudinal ends and a support part connected between the two transverse beam connection parts, and each end of the transverse beam has a weight for overlapping connection with the two transverse beam connection parts at the corresponding ends of the two floats. A connecting portion is provided, the overlapping connecting portion and the transverse girder connecting portion are detachably connected, the support portion is provided with a second track and a third track extending in the longitudinal direction, a transverse girder movement support member is slidably connected on the second track, the transverse girder movement support members of the two floats are used to support the transverse girder when the overlapping connecting portion of the transverse girder is not overlapped with the transverse girder connecting portion of the float, and to move the transverse girder they support along the longitudinal direction, a large track wheel is provided at the bottom of the large vehicle that aligns with the third track, and the large track wheel is connected to the bottom of the large vehicle by a lifting member, The construction method for the immersed tunnel further includes an assembly step of a one-piece barge, and the assembly step of the one-piece barge is By connecting the non-working leveling device between the two transverse beams to form a composite structure, the composite structure and the two floats are moved above the planned construction area, with one transverse beam being the first transverse beam and the other being the second transverse beam. Controlling the sinking of the two floats and moving the two floats to the lower ends of the composite, The floating of the two floats is controlled so that the overlapping connection portions at both ends of the first transverse girder within the composite are overlapped and connected onto the transverse girder connection portions at one longitudinal end of each of the two floats, and the overlapping connection portions at both ends of the second transverse girder are supported on the transverse girder moving support members of the two floats, and the large traveling vehicle of the leveling device is erected between the two floats, and the integrally overlapped connection portions and the transverse girder connection portions are connected, The assembly of the integrated barge includes disconnecting the connection between the second transverse beam and the leveling device, moving the second transverse beam to the longitudinal end of the float furthest from the first transverse beam using the transverse beam moving support member, overlapping and connecting the overlapping connection portions at both ends of the second transverse beam onto the transverse beam connection portions at the ends of the two floats, connecting the integrally overlapped overlapping connection portions to the transverse beam connection portions, and disconnecting the connection between the leveling device and the first transverse beam, A method for constructing an immersed tunnel according to claim 13.

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