JPS5919207B2 - Continuous underground wall excavation method and equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel continuous underground wall excavation method and an excavator used in the method.

The conventional continuous underground wall excavation method fills underground trenches with wastewater,
This method involves repeating the process of rotating an excavator in sewage, transporting sewage and earth together to the ground, depositing the earth and sand on the ground, and then returning the sewage to an underground trench (see Figure 1). ), there is a method in which piles 2 are installed on both sides of the excavation area to provide a fixed amount of horizontal separation and serve as precision rulers, excavation is carried out in packets using the ruler piles 2, and the removal is carried out in dirty water (see Figure 2). there were.

However, although the former method is efficient because it is equipped with accuracy maintenance, excavation, and unloading equipment in one machine, it is expensive, has a narrow range of application to the width and thickness of the wall, and has straight lines. There were drawbacks such as the fact that it could only be constructed on certain sections.

In addition, since the latter method relies on the pre-installed ruler piles 2 for accuracy, the packet only needs to have the excavation function and earth and sand transport function, and therefore the machine is inexpensive and has a wider range of uses than the former.

However, there are still limits to its general-purpose range, and there are also problems in that it is necessary to install ruler piles accurately in advance, that it takes a long time to excavate to raise the packets to the ground, and that there are problems when lowering and lifting the packets. There were disadvantages such as damaging the excavated wall surface and being able to excavate only in a straight line.

The present invention provides a continuous underground wall excavation method that can eliminate these drawbacks of conventional methods, and preferred embodiments thereof will be described as follows with reference to the accompanying drawings.

First, as shown in Fig. 3, a pile 2, which serves as a precision ruler for excavation, is drilled and installed in the ground 1 in advance.

Next, as shown in FIGS. 4 to 6, a supporting frame 6 that is linear or curved in plan is inserted so as to engage the two ruler stakes 2.

The excavator 3 is mounted on the support frame 6, and a power pipe and/or electric cable 4 and an earth removal sand pipe 5 are connected to the continuous parts 42 and 52, respectively, from the ground.

The excavator 3 is equipped with blades 31 for excavating earth and sand, and wheels 32 for reciprocating the excavator from side to side on the support 6, and as shown in FIG.
There is a mechanism 33 for driving the engine and a power chamber 41 for supplying power thereto.

Furthermore, as shown in FIG. 5, an opening 51 is provided at the lower end of the excavator 3 for sucking in earth and sand.

During excavation, power (e.g. pneumatic, electric, hydraulic) supplied through the power pipe and/or electric cable 4 enters the excavator 3 through the connection 42 and transmits the power to the drive mechanism 33 in the power chamber 41. Then, the excavation blade 31 is rotated to excavate the underground 1.

When air pressure is used as the motive power, the air that has passed through the power chamber 41 exits from the connecting portion 52 through the earth removal sand pipe 5 to the ground.

At this time, the earth and sand excavated by the excavation blade 31 is air lifted together with waste water and transported to the ground.

If electricity or hydraulic power is used as the power, the earth removal sand pipe 5
The earth and sand will be transported to the ground by a pump connected to ゛.

The excavator 3 moves to the left or right between the two ruler stakes 2 on the support base 6 by rotating the wheels 32 using power from the drive mechanism 33.

Control of starting, stopping, speed and direction of movement can be performed electrically or mechanically by a ground control mechanism 7.

The support frame 6 is suspended from the ground by a wire 61, and is lowered along two vertical ruler piles 2 as excavation is performed.

The power pipe and/or electric cable 4 and the earth removal sand pipe 5 are
By being connected to the excavator 3 by the connecting parts 42, 43, 52, and 53, sufficient flexibility and length are maintained for horizontal movement of the excavator 3.

In addition, the inclinometer is attached to the support frame 6, the depth meter is attached to the wire 61,
By attaching each, measuring and calculating them, it is possible to maintain a high degree of accuracy of the support frame 6.

In addition to the manner shown in FIGS. 3 to 6, the support frame 6 may be engaged with the ruler stake 2 in the manner shown in FIGS. 8 and 9, for example.

As the movement mechanism for the wheels 32, an air motor, a hydraulic motor, an electric motor, etc. can be used.
In any case, consideration must be given to pressure resistance (5 to 10 kg/cytt) so that it can withstand use underwater.

In the present invention, since the precision, excavation, and transport mechanisms are managed by separate mechanisms, the manufacturing cost of the machine is low, the range of application to the width and length of continuous underground wall sections is wide, and the soil transport is easy. It can be carried out with an air lift, the excavation speed is fast, there is no damage to the excavated wall surface when carrying out earth and sand, and the shape of the support frame 6 allows excavation even on flat curved surfaces.

[Brief explanation of drawings]

Figures 1 and 2 are plan views showing the conventional method, Figure 3 is a plan view and cross-sectional view showing the method of the present invention, Figure 4 is a side view and cross-sectional view showing the construction status of the method of the present invention, and Figure 5 is a plan view showing the construction method of the present invention. 4, FIG. 6 is a BB homeland in FIG. 4, FIG. 7 is a sectional view showing a structural example of the excavator of the present invention, and FIGS. 8 and 9 are ruler piles. FIG. 2 is a schematic plan view showing a mode of engagement between the frame and the supporting frame. In the figure, 1 is the ground, 2 is the ruler pile, 3 is the excavator, 32
is a digging blade, and 6 is a support stand.

Claims (1)

[Claims] 1. Ruler piles are provided on both sides of the underground excavation part, and along these,
In the continuous underground wall excavation method, which involves excavating underwater and transporting earth and sand using an excavator mounted on a support frame, the excavator's excavator blades are rotated by power supplied from the ground, and the excavator is A construction method characterized by excavating while reciprocating between both ruler piles on a support stand, and transporting the excavated earth and sand to the ground through a pipe connected to an excavator and opened above the excavation blade. 2. A support that can move up and down between two ruler piles, an excavator that excavates earth and sand with a digging blade while reciprocating between the two ruler piles on the support, and the excavator. A continuous underground wall excavation device characterized by comprising an earth removal sand pipe connected to a machine and opened above an excavation blade.