Sea Outfall Method

​Overview

Sea outfall method with Unclemole makes it possible to install jacking pipes under the sea while keeping the seabed clean. The boring machine will be retrieved after arriving at its destination under the sea.

Outline diagram of sea outfall method

Starting Shaft

Applicable Soil
​Soft Clay to Rock

​Reception Shaft

Lock door sleeve blocks water to prevent the boring machine from  
submersion

Jacking Pipe

Slurry Type Pipe 

Jacking Machine

(Unclemole Super)

Lock Door Sleeve

Valve

Sea Level

​Split position

Lock Door Sleeve

Retrieve the boring machine by following the steps below:

1.Drive the boring machine to the reception shaft.

2.Retrieve the slurry pumps and operation cables from the starting shaft.

Sea Level

3.Remove the bolts on the lock door sleeve, and lift the boring machine by a crane vessel.

Sea Level

4. Lay the water intake pipe into the casing pipe and fill the space  
between the pipes. Then remove the rear part of the lock door sleeve  
left inside the edge of the casing pipe.

図sea4.png

Inspecting the inside of the lock door sleeve

Lock door sleeve

​CASE STUDY

図2.png

RECEPTION SHAFT

​CASE1: CONSTRUCTION SUMMARY

BORING MACHINE USED: Unclemole​
JACKING LENGTH: 102m
SOIL CONDITION: Gravel layer
EARTH COVER: -3m~-4.2m
​WATER DEPTH: 3m~6m
PIPE: Reinforced concrete pipe
​INCLINATION: -25%~-6%

​◆Case1. Plan View

​GL:-2.7m DRIVE SHAFT

​GL:-6.1m RECEPTION SHAFT

​◆Case1. Section View

​1000mm ID, L=245m

​GL:-6.1m RECEPTION SHAFT

​MACHINE SPECIFICATION

Unclemole TCC1000

Inner diameter: 1000mm

Outer diameter: 1220mm

Machine Length: 3045mm
Weight: 8400kg
Crusher type: Crusher Head

​GL:-2.7m DRIVE SHAFT

IMG_2424.JPG

​CASE2: CONSTRUCTION SUMMARY

​CONSTRUCTION METHOD: Unclemole Method​
JACKING LENGTH: 100m
SOIL CONDITION: Bedrock
EARTH COVER: GL-6.0m~GL-9.9m 
​WATER DEPTH: 7m
PIPE: Reinforced concrete pipe

RECEPTION SHAFT

​◆Case2. Plan View

​800m ID, L=95.1m

​GL:-6.0m DRIVE SHAFT

​GL:-9.9m RECEPTION SHAFT

​GL:-6.0m DRIVE SHAFT

​◆Case2. Section View

​800m ID, L=95.1m

​GL:-9.9m RECEPTION SHAFT

​GL:-6.0m DRIVE SHAFT

​MACHINE SPECIFICATION

Unclemole Super TCS800

Inner diameter: 800mm

Outer diameter: 980mm

Machine Length: 3165mm
Weight: 6100kg
Crusher type: Corn Crusher 

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