Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1997-08-13
2000-10-31
Lillis, Eileen D.
Hydraulic and earth engineering
Earth treatment or control
Chemical
405 55, 405266, 37352, 37353, 37464, E02D 518, E02D 2900
Patent
active
061392251
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF ART
1. Field of the Invention
The present invention relates to underground continuous wall building method and apparatus for building a variety of continuous walls in the ground for water cutoff purpose, reinforcing purpose and other purposes.
2. Description of Background Art
As a technique for building an underground continuous wall, there has been conventionally known a method according to which a chain cutter is vertically mounted on a running carriage (e.g. a base machine of a crawler crane), the running carriage is moved in a transverse direction while the cutter is rotated, thereby excavating a continuous trench of a fixed width, and a continuous wall is built by pouring a wall material such as cement or concrete into this continuous trench and solidifying it therein or by inserting a concrete panel therein (refer to Japanese Unexamined Patent Publication Nos. 5(HEI)-280043 and 5(HEI)-280044.
The cutter is constructed such that an endless chain is fitted between upper and bottom ends of a cutter post which is a vertically long boxlike frame, and a continuous trench Gis excavated by a multitude of excavating blades provided at the outer surface of the chain.
However, according to this technique, only vertically extending continuous walls can be built. Therefore, such walls cannot have a water cutoff function along vertical direction as cutoff walls, but can only be used as cutoff walls along horizontal direction.
Thus, in the case that a water cutoff function along vertical direction is required, the ground must be filled up after being excavated to built a horizontal cutoff wall or a vertical wall must be built up to an impermeable bed. However, such techniques are poor in performance and high in cost.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide underground continuous wall building method and apparatus which are capable of easily building a cutoff wall having a water cutoff function along vertical direction as well as multi-purpose underground continuous walls.
It is another object of the present invention to provide an underground continuous wall building method which, in the case that a protection wall for a river bank or the like is to be built, is capable of maintaining natural views while keeping a bank slope intact; keeping the bank as natural as possible even if the bank protection wall is exposed due to a washout; effecting an easy evacuation at the time of the rise of water; and enabling a construction work to be continued even during a flooding period.
It is still another object of the present invention to provide an underground continuous wall building method which is capable of displaying a high slip destruction preventing effect in the case that a reinforcement wall is build to prevent a slip destruction of an already existing embankment.
It is further another object of the present invention to provide an underground continuous wall building apparatus capable of desirably adjusting an excavation angle according to the application of the continuous wall.
In order to solve the above problems, the invention adopts the following constructions.
According to the invention a chain cutter in which an endless chain provided with excavation blades is fitted between upper and bottom ends of a cutter post is obliquely mounted on a running carriage; a continuous trench is excavated by moving the running carriage in a transverse direction while the cutter is rotated with the cutter obliquely placed in the ground; and a slanting continuous wall is built in the ground by pouring a wall material into the thus excavated continuos trench. Preferably, the slanting continuous trench is so excavated as to have a substantially triangular cross section and the wall material is poured into this continuous trench in order to build a slanting continuous wall which serves as a roof of an underground construction.
The slanting continuous trench may be excavated between vertical walls built in the ground and the wall material may be poured into this cont
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Aoi Minoru
Ashida Shigeki
Inagaki Yoshiaki
Kinoshita Fumio
Koike Kenji
Kabushiki Kaisha Kobe Seiko Sho
Lee Jong-Suk
Lillis Eileen D.
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