2 results about "Pebble" patented technology

The invention discloses a sand pebble pipe jacking machine, which comprises a tool pipe, a relay room and a work pipe. The front end of the tool pipe is provided with a ring cutter. An angle between the ring cutter and a horizontal plane is [alpha] less than the natural angle of repose of a sand pebble. The relay room is provided with front jacks. The maximum jacking length of each front jack is Hmeters. The bottom of a front pressure-bearing ring is upwards connected with a baffle. The baffle upwards supports a shaftless screw conveyor. The shaftless screw conveyor in the work pipe is downwards connected with a front stopping plate and a rear stopping plate. The work pipe is provided therein with an electric bucket truck. The tunneling section area of the tool pipe is S square meters. The volume of the electric bucket truck is V cubic meters. The distance between the front stopping plate and the rear stopping plates is L meters, wherein L=V/S and H is an integral multiple of L. The present invention also discloses a pipe jacking construction method using the sand pebble pipe jacking machine. The sand pebble pipe jacking machine can excavate sand pebbles efficiently, prevent the conveyor from being blocked, and is low in material conveying energy consumption.

The invention discloses a sleeve valve pipe for reinforcing the pit bottom of a water-rich pebble bed deep foundation pit and a construction process, and the sleeve valve pipe is used for reinforcingthe pit bottom of the water-rich pebble bed deep foundation pit, preventing the pit bottom from bulging and improving the stability of the foundation pit. The sleeve valve pipe is characterized by comprising a sleeve valve pipe body (1), a grouting pipe (2), grouting liquid (7), a manual sand filling layer (6), a drainage plate (5), a grout stopping plug (3), a connector (8), a rubber raft (4) anda conical plug (9). The construction process comprises the following steps: after surveying and setting out, positioning a drilling machine in place, drilling holes, preparing sand, installing the sleeve valve pipe, constructing a manual sand filling layer, conducting grouting in sections and sealing holes. The sleeve valve pipe is fixed through manual sand filling, river sand in the manual sandfilling layer can be flushed into a pebble stratum through high grouting pressure and grouting liquid and is effectively packed into gaps of the pebble stratum after being mixed with the grouting liquid, the gradation of the pebble stratum is changed, a better grouting effect is achieved, the manufacturing cost is low, and economic benefits are high.