Tunneling device for pipe jacking and its construction method

Abstract

A tunneling apparatus for use in a pipe jacking method including an excavating apparatus, a head front-end track, a middle-section track, and a rear device. The excavating apparatus includes a transmission device and a chain blade. The transmission device includes a driving device and a sprocket. During construction, the chain blade for excavating rock and earth runs on the head front-end track and the middle-section track. The shape of a head excavation face is the same as that of the cross-section of a pipe section. The rear apparatus includes a jacking device mounted in a construction well. The front end of the middle-section track is connected to the head front-end track, and the tail end of the middle-section track is connected to the rear device. During construction, the driving device drives the chain blade, so that the chain blade runs along the tracks. Blades on the head front-end track excavate the ring-shaped rock and earth in a projection part of the cross-section of the pipe section.

Claims

1. A tunneling device for pipe jacking, the tunneling device comprising: an excavating device comprising a transmission device and a chain blade, the transmission device comprising a driving device and a chain wheel, the chain blade comprising a chain and blades fixed on the chain; a head front-end track comprising a tail; a middle-section track comprising a front end and a tail end, the front end of the middle-section track being connected to the head front-end track; and a rear device comprising a jacking device, the tail end of the middle-section track being connected to the rear device, whereby, during construction, the driving device drives the chain blade to operate on the head front-end track and the middle-section track to excavate rock and soil, the blade on the head front-end track excavates the annular rock and soil on a projected cross-section of a pipe joint, and the chain blade brings the excavated rock and soil back by running backward on the middle-section track.

2. The tunneling device of claim 1, wherein the described middle-section track is one component of the pipe joint.

3. The tunneling device of claim 1, wherein the chain blade is adapted to replace the blade on the chain in working shafts to adapt to different geological conditions.

4. The tunneling device of claim 1, wherein the chain blade is a multi-row chain blade along the transversal direction that is adapted to excavate instantaneously or separately.

5. The tunneling device of claim 1, wherein a slurry pipeline is arranged in the excavating device, and nozzles are provided on the end of the pipeline.

6. A method of pipe jacking using a tunneling device, the method comprising: excavating working shafts and building working platforms; installing a rear device of a tunneling device in one of the working shafts; connecting and fixing a first pipe joint and a head front-end track of the tunneling device, and installing a chain blade of the tunneling device on a track of the tunneling device; installing a middle-section track of the tunneling device; installing a transmission device of the tunneling device, the transmission device comprising a driving device and a chain wheel, to form an excavating device; installing a jacking device; driving a chain of the chain blade, whereby the chain blade on the front track excavates rock and soil on front and brings it to the rear, and the jacking device pushes the tail end of the pipe joint to move the pipe joint forward; after jacking the first pipe joint through the specified distance, retracting the jacking device, lowering the second pipe joint, and connecting the head of the second pipe joint to the end of the first pipe joint; installing the chain blade on the track of the second pipe joint to form the excavating device, whereby the chain blade excavates the rock and soil in front of the first pipe joint, the jacking device pushes the end of the pipe joint or the driving device, and the pipe joint moves forward; repeating the above actions, completing the construction of the entire pipe joint, and excavating rock and soil in the pipe joint after partial or total completion of the pipe joint jacking construction.

7. A method of pipe jacking using a tunneling device, the method comprising: building working shafts outside a subway station; building a tunnel perpendicular to the longitudinal direction of the station in the working shafts; installing a rear device of a tunneling device in one of the working shafts; connecting and fixing a first pipe joint and a head front-end track of the tunneling device, and installing a chain blade of the tunneling device on a track of the tunneling device; installing a middle-section track of the tunneling device; installing a transmission device of the tunneling device, the transmission device comprising a driving device and a tensioning device, to form an excavating device; installing a jacking device; driving a chain of the chain blade, whereby the chain blade excavates the annular rock and soil on the projected part in front of the head and brings it to the rear, and jacking device pushes the pipe joint to move the pipe joint forward; after jacking the first pipe joint through the specified distance, retracting the jacking device, lowering the second pipe joint, and connecting the front end of the second pipe joint to the end of the first pipe joint; repeating the above actions, completing the construction of the entire pipe joint, and excavating rock and soil in the pipe joint after partial or total completion of the pipe joint jacking construction, building subway stations in a built tunnel; installing the rear device in a built tunnel; connecting and fixing the first pipe joint and the head front-end track, and install the chain blade on the track; installing the middle-section track; installing the transmission device; the jacking device; driving the chain of the chain blade, whereby the chain blade excavates the annular rock and soil on the projected part in front of the head and brings it to the rear, and jacking device pushes the pipe joint to move the pipe joint forward; after jacking the first pipe joint through the specified distance, retracting the jacking device, lowering the second pipe joint, and connecting the front end of the second pipe joint to the end of the first pipe joint; repeating the above actions, completing the construction of the entire pipe joint, and excavating rock and soil in the pipe joint after partial or total completion of the pipe joint jacking construction.

8. The method of claim 7, wherein the entire pipe joint comprises multiple rows along the transversal direction.

9. The method of claim 8, comprising jacking the multi-row pipe joint along the transversal direction in batches during construction.

10. The method of claim 7, comprising building multiple of the working shafts along a longitudinal direction or on both sides.

11. The method of claim 7, comprising jacking the jacking pipe joint along two opposite directions.

Description

(1) In the figure ‘1’ is the tunneling device of the pipe jacking method, which consists of drive device 1-1 and chain blade 5; 1-1 is the transmission device of excavating device 1, which consists of drive device 1-1-1, tensioning device 1-1-2 and chain wheel 1-1-3; 1-1-1 is the driving device of transmission device 1-1; 1-1-2 is the tensioning device of transmission device 1-1; 1-1-3 is the chain wheel of transmission device 1-1; 2 is the head front-end track of tunneling device; 2-1 is the slurry pipeline on track 2; 3 is the middle-section track of tunneling device; 3-1 is the slurry pipeline on middle-section track 3; 4 is the rear device of tunneling device; 4-1 is the jacking device of rear device 4; 5 is the chain blade of excavating device 1; 5-1 is the chain consisted of chain blade 5, including caterpillar, rope and flexible belt; 5-1-1 is the cross of cross A consisted of chain 5-1; 5-1-2 is the cross B of the cross consisted of chain 5-1; 5-1B is the flexible belt consisted of chain blade 5; 5-2 is the blade for rock and soil excavation fixed on chain 5-1; 5-2B is the blade for rock and soil excavation fixed on flexible belt 5-1B; 6 is the pipe joint of tunneling device; 7 is the working shaft; 8 is a tunnel perpendicular to the longitudinal direction of subway station; 9 is the tunnel parallel to subway station, which is also the main structure of subway station; 9-1 is the square-shaped pipe joint on both sides of subway station 9; 9-2 is the slotted pipe joint at the upper middle of subway station 9; 9-3 is the slotted pipe joint at the lower middle of subway station 9; 10 is the tunnel; 10-1 is the slotted pipe joint in the middle of the tunnel; 10-2 is the U-shaped pipe joint on both sides of the tunnel.

DETAILED DESCRIPTION OF IMPLEMENTATION

(2) A tunneling device for the pipe jacking method consists of an excavating device, head front-end track, middle-section track and rear device; the excavating device consists of a transmission device and chain blade, transmission device consists of a driving device and chain wheel; chain blade consists of chain and blades fixed on the chain; chain blade operates on the head front-end track and the middle-section track during construction to excavate rock and soil. The tail of the head front-end track is connected to the front end of the first pipe joint; the shape of the head excavating face is the same as the that of the cross section of the pipe joint; the rear device includes a jacking device installed in the construction well; the front end of middle-section track is connected to the head front-end track; the tail end of the middle-section track is connected to the rear device, which is located on the external side of or within the pipe joint. During construction, the driving device drives the chain blade to operate along the track. The blade on the head front-end track excavates the annular rock and soil on the projected cross-section of the pipe joint. The chain blade brings the excavated rock and soil back by running backward on the middle-section track. The slurry pipeline is arranged in the excavating device, and nozzles on the end of the pipeline.

(3) The described middle-section track is one component of the pipe joint.

(4) The described chain blade is to replace the blade on the chain in working shafts to adapt to different geological conditions.

(5) The described chain blade is a multi-row chain blade along the transversal direction, which excavates instantaneously or separately as necessary.

(6) The described jacking construction method includes the steps below: 1) Excavate working shafts and build working platforms; Excavate working shafts and build working platforms 2) Install the rear device in working shaft; 3) Connect and fix the first pipe joint and the head front-end track, and install the chain blade on the track; 4) Install the middle-section track; 5) Install the transmission device consisting of the driving device and the chain wheels, to form an excavating device; 6) Install the jacking device; 7) Drive the chain. The chain blade on the front track excavates rock and soil on front and brings it to the rear. The jacking device pushes the tail end of the pipe joint or the jacking driving device. And, the driving device pushes the end of the pipe joint to move the pipe joint forwards; 8) After jacking the first pipe joint through the specified distance, the jacking device retracts. Lower the second pipe joint, and connect the head of the second pipe joint to the end of the first pipe joint; 9) Install the chain blade on the track of the second pipe joint to form the excavating device. The chain blade excavates the rock and soil in front of the first pipe joint. The jacking device pushes the end of the pipe joint or the driving device, and the pipe joint moves forward; 10) Repeat the above actions, complete the construction of the entire pipe joint, and excavate rock and soil in the pipe joint after partial or total completion of pipe joint jacking construction; 2), 3), 4), 5) and 6) actions are listed in no particular order.

(7) The construction method described is the construction method of the subway station, including the steps below: I. Build working shafts outside the subway station; II. Build a tunnel perpendicular to the longitudinal direction of the station in the working shafts 1) Install the rear device in working shaft; 2) Connect and fix the first pipe joint and the head front-end track, and install the chain blade on the track; 3) Install the middle-section track; 4) Install the transmission device consisting of the driving device and the tensioning device, etc., to form an excavating device; 5) Install the jacking device; 6) Drive the chain. The chain blade excavates the annular rock and soil on the projected part in front of the head and brings it to the rear. The jacking device pushes the pipe joint, to move the pipe joint forwards; 7) After jacking the first pipe joint through the specified distance, the jacking device retracts. Lower the second pipe joint, and connect the front end of the second pipe joint to the end of the first pipe joint; 8) The jacking device pushes the pipe joint, and the chain blade excavates the rock and soil in front of the head. The jacking device pushes the pipe joint to move the pipe joint forwards; 9) Repeat the above actions, complete the construction of the entire pipe joint, and excavate rock and soil in the pipe joint after partial or total completion of pipe joint jacking construction; 1), 2), 3), 4) and 5) actions are listed in no particular order. III. Build subway stations in a built tunnel 1) Install the rear device in built tunnels; 2) Connect and fix the first pipe joint and the head front-end track, and install the chain blade on the track; 3) Install the middle-section track; 4) Install the transmission device consisting of the driving device and the tensioning device, etc., to form an excavating device; 5) Install the jacking device; 6) Drive the chain. The chain blade excavates the annular rock and soil on the projected part in front of the head and brings it to the rear. The jacking device pushes the pipe joint, to move the pipe joint forwards; 7) After jacking the first pipe joint through the specified distance, the jacking device retracts. Lower the second pipe joint, and connect the front end of the second pipe joint to the end of the first pipe joint; 8) The jacking device pushes the pipe joint, and the chain blade excavates the rock and soil in front of the head, the jacking device/the jacking pipe joint and the pipe joint moves forwards; 9) Repeat the above actions, complete the construction of the entire pipe joint, and excavate rock and soil in the pipe joint after partial or total completion of pipe joint jacking construction; 1), 2), 3), 4) and 5) actions are listed in no particular order.

(8) The described pipe joint for subway station construction method consists of multiple rows along the transversal direction.

(9) The described multi-row pipe joint along the transversal direction in the subway station construction method is to be jacked in batches during construction.

(10) There are multiple said working shafts along a longitudinal direction or on both sides.

(11) The described jacking pipe joint in the built tunnel is jacked along with two opposite directions.

(12) For a further description of this invention, refer to the followings and figures attached:

(13) As shown in FIGS. 1-5, a tunneling device consists of excavating device 1, head front-end track 2, middle-section track 3 and rear device 4. Excavating device 1 consists of transmission device 1-1 and chain blade 5. Transmission device 1-1 consists of driving device 1-1-1, tensioning device 1-1-2 and chain wheel 1-1-3. Chain blade 5 consists of chain 5-1 and blades 5-2 fixed on the chain 5-1. Track 2-1 is arranged on the front end and both sides of the head front-end track 2 for chain blade 5 to operate. The tail of the head front-end track 2 is connected to the front end of the first pipe joint 6. The shape of the head excavating face is the same as the that of the cross-section of the pipe joint. The rear device 4 includes a jacking device 4-1 installed in the construction well. The front end of middle-section track 2 is connected to the head front-end track 3. The tail end of the middle-section track 3 is connected to the rear device 4, which is located closely adjacent to lateral sides of the tunnel pipe joint 6. The slurry pipeline 3-1 is arranged in the middle-section track 3. During construction, the driving device 1-1-1 drives the chain 5-1, to drive the blade 5-2 to operate along the track. The blade 5-2 on the head front-end track 2 excavates the annular rock and soil on the projected cross-section of the pipe joint. The head front-end track 2 brings the rock and soil excavated by the head back through the chain blade 5 moving backward on the middle-section track 3. The slurry pipeline 2-1 is arranged in the head front-end track 2, and nozzles are provided on the end of the pipeline.

(14) As shown in FIGS. 6-8, the tunnel construction method adopts the jacking pipe method, including the steps below: 1) Excavate working shafts and build working platforms; 2) Install the rear device in working shaft 4; 3) Connect and fix the first pipe joint 6 and the head front-end track, and install the chain blade 3 on the track; 4) Install middle-section track 3; 5) Install the transmission device 1-1 consisted of the driving device 1-1-1 and tensioning device 1-1-2, etc., to form an excavating device 1; 6) Install the jacking device 4-1; 7) Drive the chain 5-1. The blade 5-2 excavates the annular rock and soil on the projected part on the front and brings it to the rear. The jacking device 4-1 pushes the pipe joint 6, to move the pipe joint 6 forwards; 8) After jacking the first pipe joint through the specified distance, the jacking device 4-1 retracts. Disconnect the chain 5-1 of chain blade 5, and the transmission device 1-1 of excavating device 1 also retracts. Lower head of the second pipe joint 6 and the middle-section track 3, and connect the head of the second pipe joint to the end of the first pipe joint, and the tail and end of the front and rear middle-section track 3; 9) After extending the chain blade 5, connect the disconnected chain 5-1. Drive chain 5-1. The chain blade 5 excavates the rock and soil in front. The jacking device 4-1 pushes the pipe joint 6, and the pipe joint 6 moves forward; 10) Repeat the above actions, complete the construction of the entire pipe joint 6, and excavate rock and soil in the pipe joint after partial or total completion of pipe joint jacking construction; 2), 3), 4), 5) and 6) actions are listed in no particular order.

(15) As shown in FIGS. 9 and 10, the tunneling device construction steps for subway station building: I. Excavate working shaft 7 outside the subway station; II. Build the tunnel 8 along the longitudinal direction of the station in working shaft 7

(16) As shown in FIGS. 11-14, the specific steps for tunnel 9 construction in working shaft 7: 1) Install rear device 4 in working shaft 7; 2) Connect and fix the first pipe joint 6 and the head front-end track 2, and install the chain blade on the track; 3) Install middle-section track 3 on pipe joint 6; 4) Install the transmission device 1-1 consisting of the driving device 1-1-1 and tensioning device 1-1-2, etc., to form an excavating device 1; 5) Install the jacking device 4-1; 6) Drive the chain 5-1. The blade 5-2 excavates the annular rock and soil on the projected part on the front and brings it to the rear. The jacking device 4-1 pushes the pipe joint 6, to move the pipe joint 6 forwards; 7) After jacking the first pipe joint through the specified distance, the jacking device 4-1 retracts. Disconnect the chain 5-1 of chain blade 5, and the transmission device 1-1 of excavating device 1 also retracts. Lower head of the second pipe joint 6 and the middle-section track 3, and connect the head of the second pipe joint to the end of the first pipe joint, and the tail and end of the front and rear middle-section track 3; 8) After extending the chain blade 5, connect the disconnected chain 5-1. Drive chain 5-1. The chain blade 5 excavates the rock and soil in front. The jacking device 4-1 pushes the pipe joint 6, and the pipe joint 6 moves forward; 9) Repeat the above actions, complete the construction of the entire pipe joint 6, and excavate rock and soil in the pipe joint after partial or total completion of pipe joint jacking construction; 1), 2), 3), 4) and 5) actions are listed in no particular order.

(17) As shown in FIGS. 15-20, build subway station 9 in the built tunnel 8. The subway station 9 consists of square-shaped pipe joint 9-1 on both sides, slotted pipe joint 9-2 in the upper middle and the slotted pipe joint 9-3 in the lower middle. During construction, jacking is carried out in batches. First comes the square-shaped pipe joint 9-1 on both sides, then the slotted pipe joint 9-2 in the upper middle, and finally the slotted pipe joint 9-3 in the lower middle. Excavate the rock and soil in the pipe joint at the partial or complete construction of pipe joint jacking.

(18) As shown in FIGS. 21-23, build tunnel 10 in working shaft 7. Tunnel 10 consists of square-shaped pipe joint 10-1 in the middle and U-shaped pipe joint 10-2 on both sides. During construction, jacking is carried out in batches. First comes the square-shaped pipe joint 10-1 in the middle, then the U-shaped pipe joint 10-2 on both sides separately. Excavate the rock and soil in the pipe joint at the partial or complete construction of pipe joint jacking.