Compatible to Sudden Curves
-Improvement of Tunnel Boring Machine
and Stable Construction Ability-
One feature of mu d-soil-pressure-type pr opulsion engineering is construction on sudden curves.
With our many past results,we proved that we are a pioneer of
mud-soil-pressure-type propulsion engineering.
Construction Example 1
In Fukuoka City φ1100 m/m, jacking lengt h : 315.945 m, curve radiu s : 200 m, 14 m, 50 m, Soil
type : Sand mixed with small stones.
After the area of R=14m until the destination, the construction area was narrow road and .
The construction was carried out under the narrow road and busy commercial avenue.
Therefore the work was one which you cannot afford to fail on it .
We have reached the destination using only about 1/2 of the des igned jacking capacity.
Top view of pipe arrangement of φ1100
| Type | Shape and length | Quantity | Unit | Remarks |
|---|---|---|---|---|
| 50N Standard pipe 1st type | L=2440 | 50 | Pipe (s) | |
| Standard pipe Total | 50 | Pipe (s) | ||
| 50N 1/4 pipe 3rd type | L=637 | 151 | Pipe (s) | |
| 50N 1/4 pipe 3rd type | L=637 | 95 | Pipe (s) | With stopper |
| 70N 1/4 pipe 3rd type | L=637 | 76 | Pipe (s) | With stopper |
| 1/4 pipe Total | 322 | Pipe (s) | ||
| 50N Half pipe 1st type | L=1200 | 0 | Pipe (s) | |
| Grand total | 372 | Pipe (s) |
The length of 1/4 pipe includes the thickness of buffer material.
Concrete-steel composite pipe (Status in the pipe(R=14m)) was used, and a joint opening supporting system unit was equipped.
Construction Example 2
(Three Simultaneously Operating + J-Curve, Manhole Reaching)
Product Material List
| Name | Length (m/m) |
Quantity | Pipe number | Remarks |
|---|---|---|---|---|
| Jacking pipe (JC-52) | 800 | 88 | 1～88 | |
| Jacking pipe (JA-52) | 2,430 | 31 | 90～120 | |
| Jacking pipe (JA-51) | 1,200 | 1 | 89 | |
| Jacking pipe (JA-51) | 2,430 | 1 | 121 | Vacant without collar |
| Total | 121 |
