A tunnel boring apparatus includes a shield body and a cutting disc provided at a front portion of the shield body. The tunnel boring apparatus includes a high pressure liquid device, which includes a liquid storage tank for storing a predetermined amount of liquid, a pressure raising device for increasing a pressure of the liquid, and a plurality of nozzles. The pressing raising device is connected to the liquid storage tank, and to a central rotating head through a first guiding pipeline. The nozzles are provided on the cutting disc, and are connected to the central rotating head through a second guiding pipeline.

A tunnel boring apparatus includes a shield body and a cutting disc provided at a front portion of the shield body. The tunnel boring apparatus includes a high pressure liquid device, which includes a liquid storage tank for storing a predetermined amount of liquid, a pressure raising device for increasing a pressure of the liquid, and a plurality of nozzles. The pressing raising device is connected to the liquid storage tank, and to a central rotating head through a first guiding pipeline. The nozzles are provided on the cutting disc, and are connected to the central rotating head through a second guiding pipeline.

The tunnel boring machine includes a data processing unit configured to obtain error data (E.sub.r) based on a current measurement value (Vp) of the strain sensor obtained at a current angle () of the cutter head and a past corresponding measurement value (Vo) obtained at a corresponding angle corresponding to the current angle, to correct the current measurement data using the error data.

The tunnel boring machine includes a data processing unit configured to obtain error data (E.sub.r) based on a current measurement value (Vp) of the strain sensor obtained at a current angle () of the cutter head and a past corresponding measurement value (Vo) obtained at a corresponding angle corresponding to the current angle, to correct the current measurement data using the error data.

An inline mounting assembly for a TBM cutter assembly includes first and second housing mounts, having upper and lower ear portions, and an inline channel sized to receive an end of the cutter assembly. The housing mounts include a first guide and a second guide defining forward and rearward abutment faces. A wedge assembly includes a bolt that extends through the first guide and engages a wedge configured to clamp the cutter shaft to the housing mount. A back support assembly includes a clamp block that abuts the rearward abutment face, a bridge block that abuts the forward abutment face, and a bolt that extends through the blocks. The bridge block abuts the shaft to provide support.

An inline mounting assembly for a TBM cutter assembly includes first and second housing mounts, having upper and lower ear portions, and an inline channel sized to receive an end of the cutter assembly. The housing mounts include a first guide and a second guide defining forward and rearward abutment faces. A wedge assembly includes a bolt that extends through the first guide and engages a wedge configured to clamp the cutter shaft to the housing mount. A back support assembly includes a clamp block that abuts the rearward abutment face, a bridge block that abuts the forward abutment face, and a bolt that extends through the blocks. The bridge block abuts the shaft to provide support.

An inline mounting assembly for a TBM cutter assembly includes first and second housing mounts, having upper and lower ear portions, and an inline channel sized to receive an end of the cutter assembly. The housing mounts include a first guide and a second guide defining forward and rearward abutment faces. A wedge assembly includes a bolt that extends through the first guide and engages a wedge configured to clamp the cutter shaft to the housing mount. A back support assembly includes a clamp block that abuts the rearward abutment face, a bridge block that abuts the forward abutment face, and a bolt that extends through the blocks. The bridge block abuts the shaft to provide support.