Tunneling device for pipe jacking and its construction method

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.

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.