JPH04281994A - Method for removing muddy water from muddy excavated soil in shield construction method - Google Patents

Abstract

PURPOSE:To reduce the improving operation of soil quality on the hopper side, raise the efficiency of treating operation of excavated soil, and reduce the cost of the treating operation. CONSTITUTION:Excavated soil 13 with muddy water, excavated by shield machine, is loaded on a steel cart 11 to transport it to the outside of pit, during which period the steel cart 11 is vibrated to forcibly vibrate the soil 11. The water is separated from the soil 13, floated up in the cart 11, and drained to the outside of pit.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to the use of a shield method in which the water content of muddy excavated soil is removed during the process of transporting the muddy excavated soil using a steel car to the outside of the mine. Regarding muddy water removal method.

0002

[Prior Art] In the shield method, muddy excavated soil excavated by a shield machine is transported backwards by a belt conveyor, loaded onto a steel truck for carrying out the excavated soil from the belt conveyor, and transported outside the mine by the steel truck. be done. Then, outside the mine, it is poured into a soil hopper, where it is mixed with chemical improvers (chemicolime type, cement type, polymer type) to absorb the moisture in the excavated soil, or mechanically A dewatering device was used to remove the water contained in the soil, and the remaining soil was disposed of by transporting it off-site.

0003

[Problems to be Solved by the Invention] However, such conventional methods have the following problems. ■When Chemicolime-based and cement-based improvers are poured into a hopper and stirred, dust is scattered and causes pollution in urban areas. ■The amount of polymeric improver added is small and it is difficult to stir it in the hopper. ■Mechanical dewatering equipment requires large-scale equipment and is expensive to run.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to remove muddy water in the process of transporting muddy excavated soil excavated by a shield machine to the outside of the mine, and to remove muddy water from the hopper side. An object of the present invention is to provide a method for removing muddy water from muddy excavated soil, which reduces soil quality improvement work, improves the efficiency of residual soil processing work, and reduces residual soil processing costs.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a first step of loading muddy excavated soil excavated by a shield machine onto a steel car, and a second step of transporting the steel car outside the mine. a third step in which the steel car is vibrated to separate water from the muddy excavated soil in the steel car in the second step, and the water floats to the upper part of the steel car; The present invention is characterized by comprising a fourth step of discharging water that has surfaced inside the steel car in the process from inside the steel car to the outside of the mine. Further, the present invention is characterized in that the third step is performed by bringing the vibration exciter into contact with the side wall of the steel car. Further, the present invention is characterized in that the third step is carried out using a vibrator that is movably arranged on the track of the steel car so as to be in contact with the bottom wall of the steel car.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method according to the present invention will be described below with reference to the accompanying drawings. First, the first embodiment will be described. FIG. 1 shows a cross-sectional side view of the inside of a tunnel, and FIG. 2 shows a front view thereof. 1
is the segment, 3 is the tunnel formed by segment 1,
In the lower part of the tunnel 3, a rail 7 is laid from the face side to the outside of the mine via a rail support stand 5, and 9 in the figure indicates a safety passage. 11 is a steel car, and the steel car 11 has wheels 11 on the rail 7.
The steel car 11 is disposed so as to be able to run through the steel car 11, and is loaded with muddy excavated soil 13 excavated by a shield machine. 15
is a drain pipe, and the drain pipe 15 is supported by the side wall of the segment 1 via a branch 17, and extends from an appropriate location inside the mine to the outside of the mine. A drainage pump is connected to the drainage pipe 15, and the end of the drainage pipe 15 is connected to a turbid water treatment tank outside the mine. Further, a flexible suction hose 19 is connected to the drain pipe 15, a strainer 21 is attached to the tip of the suction hose 19, and a valve 23 is disposed in the middle of the suction hose 19.

Next, the muddy excavated soil 1 loaded on the steel car 11
The work of removing muddy water from step 3 will be explained. The steel car 11 loaded with muddy excavated soil 13 is run from the face side to the outside of the mine on the rail 7 by an appropriate traveling means. The car 11 is temporarily stopped. Here, the worker applies the vibrator (high frequency vibrator) 25 to the side wall 11B of the steel car 11,
The steel car 11 itself is vibrated. Then, when the muddy excavated soil 13 is forcibly vibrated to cause the muddy water to breathe, the steel car 11
Water rises to the top of the tank, forming a water tank 13A. In this case, if the steel car side wall 11B is vibrated at multiple locations, breathing of muddy water can be performed more efficiently.

Next, the operator positions the tip of the suction hose 19 at the upper part of the steel car 11, opens the valve 23, suctions the floating water with the suction hose 19, and drains the turbid water outside the mine through the drain pipe 15. Discharge into tank. As a result, the excavated soil in the steel car 11 contains less moisture. Next, steel car 1
After removing the water that has surfaced in 1, remove the suction hose 19.
is taken out from the steel car 11, and the steel car 11 is driven outside the mine again. Outside the mine, when the excavated soil is put into the hopper, the water content of the excavated soil has already decreased, so by adding a small amount of improving material, the remaining soil can be easily disposed of, and soil improvement on the hopper side can be carried out. This reduces the work burden for waste soil treatment, improves the efficiency of waste soil disposal work, and reduces waste soil disposal costs.

Next, a second embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 shows a cross-sectional side view of the inside of the tunnel, and FIG. 4 shows a front view of the same. In the second embodiment, the steel car 11
This embodiment differs from the previous embodiment in that a vibrator (high-frequency vibrator) 31 is applied to the bottom wall 11C to forcibly vibrate the muddy excavated soil 13. To explain by assigning the same reference numerals to the same parts as in the first embodiment, the exciter 31 is arranged between the rail mounts 5 via a lifting mechanism 33 installed on the bottom wall of the segment 1. ing. The elevating mechanism 33 can be configured to be movable up and down by operating the operation switch 35, for example, using a combination of a parallel link mechanism and a hydraulic cylinder, or a hydraulic jack.

[0010] In order to remove muddy water from the muddy excavated soil 13 loaded on the steel car 11, first, as in the first embodiment,
The steel car 11 loaded with muddy excavated soil 13 is moved by the lifting mechanism 33.
Then, the steel car 11 is temporarily stopped at the location where the suction hose 19 is installed. Next, the worker operates the lifting mechanism 33 with the operation switch 35 to raise the exciter 31, and the exciter 3
1 is applied to the bottom wall 11C of the steel car 11, and the vibrator 31 is activated to vibrate the steel car 11 itself. And muddy excavated soil 13
When forced to vibrate and breathe muddy water, steel car 1
Water rises to the top of the tank 1, forming a water tank 13A. Next, the worker positions the tip of the suction hose 19 at the top of the steel car 11, opens the valve 23, suctions the floating water with the suction hose 19, and discharges it to the turbid water treatment tank outside the mine through the drain pipe 15. let As a result, the excavated soil in the steel car 11 contains less moisture. Next, once the water floating inside the steel car 11 has been removed, the suction hose 19 is taken out from the steel car 11, the lifting mechanism 33 is activated to lower the exciter 31, and the steel car 11 is moved outside the mine again. Let it run. In this second embodiment, as in the first embodiment, the remaining soil can be easily disposed of by adding a small amount of improving material, the work load for soil improvement on the hopper side is reduced, and the remaining soil is disposed of. Work efficiency can be improved and residual soil disposal costs can be reduced.

[0011]

[Effects of the Invention] As described above, according to the present invention, muddy water is removed from the muddy excavated soil during the process of loading the muddy excavated soil on a steel car and transporting it outside the mine. , it is possible to reduce soil improvement work on the hopper side, improve the efficiency of leftover soil work, and reduce the cost of handling leftover soil.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of a tunnel for explaining a first embodiment of the present invention.

FIG. 2 is a cross-sectional front view of the inside of a tunnel for explaining the first embodiment of the present invention.

FIG. 3 is a cross-sectional side view of the inside of a tunnel for explaining a second embodiment of the present invention.

FIG. 4 is a cross-sectional front view of a tunnel interior for explaining a second embodiment of the present invention.

[Explanation of symbols]

1 Segment 7 Rail 11 Steel car 25, 31 Exciter 33 Lifting mechanism

Claims (3)

[Claims] 1. A first step of loading muddy excavated soil excavated by a shield machine onto a steel car, a second step of transporting the steel car outside the mine, and a steel car in the second step. A third step in which water is separated from the muddy excavated soil inside the steel car by applying vibration to the steel car, and the water floats to the top of the steel car, and the water that has surfaced inside the steel car in the third step is transferred from inside the steel car to the outside of the mine. A fourth step of discharging muddy water from muddy excavated soil in a shield construction method. 2. The method for removing muddy water from muddy excavated soil in a shield construction method according to claim 1, wherein the third step is carried out by bringing an exciter into contact with a side wall of a steel car. 3. The shield construction method according to claim 1, wherein the third step is carried out using a vibrator that is movably arranged on the track of the steel car so as to come into contact with the bottom wall of the steel car. Method for removing muddy water from muddy excavated soil.