Duct piece transporting trolley and duct piece transporting method

Abstract

The invention discloses a duct piece transporting trolley and a duct piece transporting method, the duct piece transporting trolley is used for transversely transporting duct pieces to a shield center from an adjacent well mouth in a shield launching stage and then transporting the duct pieces to the position below a sucker of an erector, and the duct piece transporting trolley comprises an upper trolley and a lower trolley; a track of the upper trolley extends to the center of a shield from a well mouth adjacent to the shield, a track of the lower trolley extends to the position below an erector suction cup along the center of the shield, the track of the upper trolley and the plane of a trolley plate of the lower trolley are located on the same horizontal plane, and the upper trolley and the lower trolley are fixed through a trolley fixing device. According to the duct piece transporting trolley and the duct piece transporting method, the duct pieces are transported to the position below the suction cup of the shield tunneling machine from the adjacent well mouth through the duct piece trolley in a transverse duct piece transporting mode, the duct pieces can be transported rapidly and conveniently through the method, and normal construction is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of shield tunneling, and particularly relates to a segment transportation trolley and a segment transportation method. Background Art

[0002] At the on-site launch of a large shield project, a segment feeding machine is generally selected as the segment transportation equipment. The segment feeding machine is generally installed under the first trolley and travels with the first trolley. The construction unit needs to design the launch shaft in advance specifically, leaving an installation space for the rear support trolleys and the segment feeding machine to meet the transportation of segments and other construction supports at the site.

[0003] Due to the limitation of the shaft structure, the segment feeding machine cannot be used in the early stage of the launch, and the segment transportation is restricted. Under the condition of no segment feeding machine, to transport the segments to below the sucker of the segment erector, a temporary device that can replace the segment feeding machine needs to be considered. Considering the rear support structure of the trolley, due to the interference of the transportation channel conditions, the segment transportation problem cannot be solved. Summary of the Invention

[0004] The purpose of the present invention is to provide a segment transportation trolley and a segment transportation method, which adopt a horizontal segment transportation method. The segment trolley is used to transport segments from the adjacent shaft to below the sucker of the shield machine. This method can transport segments quickly and conveniently, ensuring the normal progress of the construction.

[0005] To achieve the above purpose, the technical solution of the present invention is to design a segment transportation trolley for the shield launch stage, which transports segments horizontally from the adjacent shaft to the shield center and then transports the segments to below the sucker of the segment erector. The segment transportation trolley includes an upper trolley and a lower trolley; the track of the upper trolley extends from the adjacent shaft to the shield center; the track of the lower trolley extends along the shield center to below the sucker of the segment erector; the upper trolley track and the car body plane of the lower trolley are on the same horizontal plane; the upper trolley and the lower trolley are fixed by a trolley fixing device.

[0006] Further, the upper trolley is equipped with a battery assembly and uses a motor to control and drive its wheels to travel. A buffer and shock absorption device is provided between the car body structure of the upper trolley and the lower trolley.

[0007] Further, the lower trolley is driven by two sets of winches, which are respectively arranged in the front ring body of the shield and under the rear ring beam.

[0008] The method for transporting segments using the segment transportation trolley includes the following steps: Step 1, set the track of the upper trolley in advance from the adjacent shaft to the launch center of the shield shaft; the upper trolley is placed on the track; Step 2, set a track under the lower trolley, and the track extends to below the sucker of the segment erector; Step 3: The track of the upper trolley extends to the head end of the track of the lower trolley, and the lower trolley stops at the head end of the track of the lower trolley. The track of the upper trolley and the car body plane of the lower trolley are on the same horizontal plane. Step 4: The segment is hoisted from the reserved position of the adjacent shaft by a crane and placed on the upper trolley. Each time, one segment is placed. After the segment is placed in place, remotely control the upper trolley to walk slowly and smoothly until it reaches the lower trolley. Step 5: When the upper trolley arrives at the lower trolley, fix the upper trolley and the lower trolley through the trolley fixing device. Step 6: Install a hoist on each of the front side inside the ring body and under the rear ring beam. The front hoist is installed and fixed on the bottom ring body segment, and the rear hoist is installed and fixed on the ring beam. The steel wires extended by the front and rear hoists are respectively connected to the front and rear lugs of the lower trolley. One hoist pulls and the other hoist drags to control the trolley to walk smoothly. When the segment transport trolley arrives below the sucker of the segment erector and the sucker sucks the segment and the pressure is maintained to meet the assembly requirements, the rear hoist pulls the segment transport trolley back to the initial position, and then the upper trolley returns to the partition shaft to transport the next segment.

[0009] Further, in Step 1, the laying method of the track of the upper trolley is to pre-formwork and pour the walking track cement beam in advance, embed steel plates on the upper part of the beam, lay a double-row track at the position of the steel plates, and the track extends to the center position of the starting shield.

[0010] Further, in Step 2, the laying method of the track of the lower trolley is to pre-install an H-shaped steel grid structure at the position below the lower trolley, adjust and install the track leading to the inside of the shield body according to the starting slope, weld stiffeners on both sides of the steel section for strengthening, lay P43 steel rails on the steel section, and use pressing plates for compaction and fixation. After the negative ring segments inside the shield tail are installed, transport the ship bottom plate to below the main machine through the segment transport trolley, place the ship bottom plate on the segments according to the starting axis, weld square steel on the ship bottom plate as the extended track of the trolley, and lay it forward in sequence to form the track of the lower trolley, ensuring that the trolley can walk to below the sucker.

[0011] The advantages and beneficial effects of the present invention are as follows: 1) In the prior art, the segment feeder cannot be installed in the early stage, the segments cannot be transported from the position of the rear support trolley, and the segments cannot be directly transported. The segments are transported to the outside of the ring body through the segment transport trolley in a limited space, solving the problem of difficult segment transportation and ensuring the smooth start of the shield machine.

[0012] 2) During the segment transportation process, the biggest difficulty lies in ensuring the smooth walking of the trolley. One is that the track of the lower trolley is continuously laid forward in sections and adjusted in time according to the shield axis; the other is to control the smooth operation of the hoist through the remote control, thereby ensuring the smooth transportation of the segments. Brief Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the transverse transportation of segment rings.

[0014] Figure 2 It is a schematic diagram of the forward transportation of segment rings.

[0015] Figure 3 It is a front view schematic diagram of the segment ring trolley.

[0016] Figure 4 It is a side view schematic diagram of the segment ring trolley.

[0017] Among them, the left shaft opening A, the right shaft opening B, the segment ring C, the reaction frame D, the No. 1 trolley E, the launching base F, the lower trolley track G, the upper trolley 1, the lower trolley 2, the winch 3, and the trolley fixing device 4. Detailed Embodiment

[0018] The following combines the drawings and embodiments to further describe the detailed embodiments of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention. Embodiment

[0019] As Figures 1 to 4 shown, a segment ring transportation trolley includes an upper trolley 1 and a lower trolley 2; the upper trolley 1 is configured with a battery assembly and uses a motor to control and drive its wheels to move. A buffer and shock-absorbing device is provided between the car body structure of the upper trolley 1 and the lower trolley 2. The segment ring transportation trolley can solve the problems of emergency braking when transporting the segment ring C and the pressure at the moment of placing the segment ring.

[0020] The design strength of the segment ring transportation trolley meets the requirements of segment ring transportation. The assembling machine suction cup stops at the highest position, and the height of the suction cup is measured to ensure a safe distance is reserved between the segment ring and the suction cup.

[0021] Method for transporting segment rings using the segment ring transportation trolley: 1) From the left shaft opening A to the starting center of the right shaft opening B, a walking track cement beam is prefabricated and poured in advance, steel plates are embedded in the upper part of the beam, and a double-row track is laid at the position of the steel plates. The track extends to the starting shield center position; the upper trolley 1 is placed on the double-row track; 2) An H-shaped steel grid structure is pre-installed under the lower trolley 2. The track leading to the inside of the shield body is adjusted and installed according to the starting slope. Rib plates are welded on both sides of the H-shaped steel for reinforcement. P43 steel rails are laid on the H-shaped steel and fixed by pressing plates. After the negative ring segment rings inside the shield tail are installed, the ship bottom plate is transported to below the main machine through the segment ring transportation trolley. The ship bottom plate is placed on the segment ring C according to the starting axis. Square steel is welded on the ship bottom plate as an extended track for the trolley, and it is laid forward in sequence, that is, the lower trolley track G is formed to ensure that the trolley can walk below the suction cup; 3) The tail end of the double-row track of the upper trolley 1 extends to the head end of the lower trolley track G, and the lower trolley 2 stops at the head end of the lower trolley track G. The double-row track and the car body plane of the lower trolley 2 are on the same horizontal plane. 4) The segment C is hoisted from the reserved position at the left wellhead A by a crane and placed on the upper trolley 1. Each time, one segment C is placed. After the segment C is placed in place, the upper trolley 1 is remotely controlled to move slowly and smoothly until it reaches the lower trolley 2. 5) When the upper trolley 1 arrives on the lower trolley 2, the upper trolley 1 and the lower trolley 2 are fixed by the trolley fixing device 4. 6) A hoist is provided respectively inside the front ring body and below the rear ring beam. The front hoist is installed and fixed on the bottom ring body segment, and the rear hoist is installed and fixed on the ring beam. The steel wire ropes extended by the front and rear hoists are respectively connected to the front and rear pulling lugs of the lower trolley. The movement of the trolley is remotely controlled. One hoist pulls and the other hoist drags to control the trolley to move smoothly. The movement speed of the trolley can be adjusted by frequency conversion according to the actual working conditions. The whole trolley device transports the segment C to below the sucker of the segment assembling machine. There is a safety distance of 130 mm between the sucker and the segment. After the sucker sucks the segment and the pressure is maintained to meet the assembling requirements, the rear hoist pulls the segment transport trolley back to the initial position, and then the upper trolley 1 returns to the left wellhead A to transport the next segment C.

[0022] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A segment transport trolley, used in the initial stage of shield tunneling, to transport the segments horizontally from the adjacent wellhead to the center of the shield tunneling machine, and then to the bottom of the assembly machine suction cup, characterized in that: It includes an upper trolley and a lower trolley; the track of the upper trolley extends from the adjacent wellhead to the center of the shield; the track of the lower trolley extends along the center of the shield to below the suction cup of the assembler; the track of the upper trolley and the car plate plane of the lower trolley are on the same horizontal plane; the upper trolley and the lower trolley are fixed by a trolley fixing device.

2. A segment transport vehicle according to claim 1, characterized in that: The upper trolley is equipped with a battery assembly, and its wheels are driven to move by motor control. A buffer and shock-absorbing device is provided between the vehicle plate structure of the upper trolley and the lower trolley.

3. A segment transport vehicle according to claim 1, characterized in that: The lower trolley is driven by two sets of winches, which are respectively arranged in the front ring body and under the rear ring beam of the shield.

4. A method for transporting pipe segments using the pipe segment transport trolley according to claim 1, characterized in that: The following steps are involved: Step 1: Setting the track of the upper trolley in advance from the adjacent wellhead to the starting center of the shield wellhead; the upper trolley is placed on the track; Step 2: a track is arranged under the lower trolley, and the track extends to the bottom of the suction cup of the assembly machine; Step 3: The track of the upper trolley extends to the head end of the track of the lower trolley, and the lower trolley stops at the head end of the track of the lower trolley, and the track of the upper trolley and the car plate plane of the lower trolley are on the same horizontal plane; Step 4: The pipe segment is hoisted from the reserved position of the adjacent wellhead by a crane, and the pipe segment is placed on the upper trolley, one pipe segment at a time. After the pipe segment is in place, the upper trolley is remotely controlled to move slowly and steadily until it reaches the lower trolley; Step 5: When the upper trolley arrives on the lower trolley, fix the upper trolley and the lower trolley by the trolley fixing device; Step six, a winch is set in the front ring body and under the rear ring beam. The front winch is installed and fixed on the bottom ring body block, and the rear winch is installed and fixed on the ring beam; the front and rear winches extend steel wire ropes and are respectively connected to the front and rear pulling ears of the lower trolley. One winch is pulling and the other winch is dragging to control the trolley to move smoothly; when the segment transport trolley arrives under the suction cup of the assembly machine, after the suction cup sucks the segment and the pressure meets the assembly requirements, the rear winch pulls the segment transport trolley back to the initial position, and the upper trolley returns to the partition wellhead to transport the next segment.

5. A method for transporting pipe segments according to claim 4, characterized in that: In step one, the track laying method for the upper trolley is to cast the walking track cement beam in advance, embed a steel plate on the upper part of the beam, lay a double row of tracks at the steel plate position, and extend the tracks to the center position of the starting shield.

6. A method for transporting pipe segments according to claim 4, characterized in that: In the step 2, the track laying method of the lower trolley is to pre-install an H-shaped steel grid structure below the lower trolley, adjust and install the track leading to the inside of the shield body according to the starting slope, weld ribs on both sides of the steel to strengthen it, lay P43 rails on the steel, and use a pressure plate to compact and fix it. After the negative ring segment inside the shield tail is installed, the ship bottom plate is transported to the bottom of the main engine by the segment transport trolley, and the ship bottom plate is placed on the segment according to the starting axis. Square steel is welded on the ship bottom plate as the trolley extension track, and it is laid forward in sequence to form the lower trolley track to ensure that the trolley can move under the suction cup.

Images