JP2709433B2 - Horizontal embedding method of strip-shaped sheet material in the ground - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for burying a sheet material for improving soft ground such as a landfill or a landfill, or a sheet material for reinforcing a ground such as embankment or cut soil in the ground horizontally. is there.

[0002]

2. Description of the Related Art Conventionally, as a method of laying drain materials for improving soft ground, for example, a method of vertically laying drain materials in soft ground and a method of laying horizontally have been practiced. Laying drain material in the direction is preferable because the effect of consolidation of the ground can be expected, and also in reinforcing the slope part of embankment ground and cutting ground, the reinforcing sheet material is formed in a horizontal layer in the ground. By burying,
The ground can be stabilized and the supporting force can be increased.

As a method of burying the sheet material horizontally in the ground, a method of cutting the ground in the buried area, laying the sheet material, and forming the sheet material layer and the soil layer alternately is adopted. ing. Further, as a method of embedding a sheet material for reinforcement on a slope of the ground such as an embankment or cut, a chain saw or a saw body is used as disclosed in, for example, JP-A-1-190825. After a band-shaped cutting groove having a fixed width and a fixed length is cut in the horizontal direction from the slope to the ground, a sheet material is inserted into the groove.

[0004]

However, according to the former method, a great deal of labor and time are required for the excavation work, and there are problems in construction and economics. At present, no suitable method has been developed as a method of improving the ground in an appropriate area reaching the depth. On the other hand, in the latter method of embedding the reinforcing sheet material on the slope of the ground, there is a limit to the length of the chain saw or saw body, and the sheet material is embedded in the ground around the slope. In order to embed the sheet material over the entire width of the slope, the work must be repeated many times since the sheet material is buried in the slope every sheet width. In addition, there is a problem in that not only the work for excavating the cutting slot, the work for inserting the sheet material, and the work for pulling out the saw body and the like become complicated, but also a long construction period is required.

The present invention has been made in view of such problems, and a belt-like sheet material such as a drain material, a reinforcing material, and a water-blocking material is provided on a desired portion of a soft ground or an embankment below the ground surface. It is an object of the present invention to provide a method of horizontally burying a band sheet material that can be efficiently laid over a wide range at a time.

[0006]

In order to achieve the above object, a method for horizontally embedding a belt-like sheet material in the ground according to the present invention uses an endless cutter such as a wire saw to a desired length in the ground to a desired length. Forming a horizontal slot through the section and horizontally inserting a first pull-in rope into the slot, and horizontally moving an endless cutter in a direction in which the slot widens. Forming a hole, arranging a second pull-in rope parallel to the first pull-in rope in the other side of the horizontal widening slot, and ground from one end of the horizontal widening slot. After connecting the tip of the strip-shaped sheet material to these first and second pull-in ropes extending outside, the first and second extending outside the ground from the other end side of the horizontal widening slot.
Pulling the pull-in rope and pulling and laying the belt-like sheet material in the horizontal widening slot.

According to a second aspect of the present invention, in the above method, a step of forming a horizontal widening slot having a desired width by laterally moving an endless cutter, and a draw-in port provided on both side ends of the horizontal widening slot are provided. After connecting the tip of the band-shaped sheet material of a fixed width to the rope outside the ground at one end of the slot, pull the rope material for pulling in from the outside of the ground at the other end of the slot to draw the band-shaped sheet material into the horizontal widening slot and lay it And the step of performing the above steps repeatedly.

[0008]

A slot is excavated in a desired depth section of the ground to be improved or reinforced by an endless cutter over a desired length section. In this case, the excavation of the slot is performed by lowering the endless cutter while excavating the ground until reaching a desired depth from the ground surface. A first pull-in rope is inserted into the bottom surface of the slot, and the rope is extended from both ends of the slot toward the ground surface. Furthermore, the slot is widened in the horizontal direction by moving the endless cutter laterally from the bottom of the slot, and a second pulling rope parallel to the first pulling rope is disposed at the wide end of the horizontal widening slot. I do.

The width of the horizontal widening groove may be equal to or greater than the width of the band-shaped sheet material to be embedded. Next, after connecting both ends of the strip-shaped sheet material to the first and second pull-in ropes extending out of the ground from one end of the slot, the ropes extend out of the ground from the other end of the slot. When the first and second pull-in ropes are pulled out, the belt-shaped sheet material is drawn into the widening slot from the tip end thereof,
It is inserted and laid over the entire length in the widening slot.

In such a method of embedding a band-shaped sheet material, when the band-shaped sheet material is drawn into the widening slot with the intermediate portion of the second pull-in rope connected to the leading end of the band-shaped sheet, the band-shaped sheet is A pull-in rope can be arranged along the side edge of the material at the side end of the widening slot. Therefore, the band-shaped sheet material is inserted into the widened slot having a certain width,
After laying, the endless cutter is laterally moved to form a next widened slot horizontally communicating with one end of the widened slot, and when the next strip-shaped sheet material is drawn into the widened slot, the pull-in is performed. Rope can be used as the first pull-in rope. Then, by successively repeating the formation of the widened slot having a certain width and the work of inserting and laying the band-shaped sheet material, it is possible to bury a series of sheet materials over a desired area of the ground to be improved or reinforced. You can do it.

[0011]

Next, as one embodiment of the present invention, a method of laying a band-shaped sheet material serving as a drain material in soft ground will be described. First, as shown in FIG. 1 and FIG. 2, after digging parallel gutters 1 and 2 with a certain length interval in the soft ground A to a desired depth by an appropriate ditch excavator (not shown). As shown in FIG. 2 and FIG. 3, the cutter part which travels in the horizontal direction is lowered into the ground while driving endless cutters 3 such as a chain wire saw from the ground surface on the ground between the two ends of the grooves 1 and 2 on both sides. By drilling, a narrow slot 4 whose both ends communicate with the desired depths of these side grooves 1 and 2 is excavated.

Thereafter, as shown in FIGS. 4 and 5, the endless cutter 3 is slightly moved horizontally in the longitudinal direction of the side grooves 1 and 2, and the first pulling rope 5 is inserted into the bottom of the slot 4. Is inserted and arranged, and the pull-in rope 5 is extended from the bottom surface of the slot 4 to the ground surface outside the ground A through the side grooves 1 and 2. The pull-in rope 5 is inserted into the slot 4.
May be installed by putting into the slot 4 from the ground, but after excavation of the slot 4 by the endless cutter 3, after connecting the rope end to a suitable place of the endless cutter 3, If the endless cutter 3 is driven in a direction in which the endless cutter 3 circulates from one side groove 1 to the other side groove 2, the endless cutter 3 can be easily and reliably pulled in and disposed.

After the first pull-in rope 5 has been drawn into the slot 4, the endless cutter 3 is horizontally moved toward the other end of the side grooves 1 and 2 while the side grooves 1 and 2 are being moved.
6 and 7, by excavating the ground A at a desired depth portion therebetween, to form a widened slot 4a having a width that allows the strip-shaped sheet material 6 to be drawn in, as shown in FIGS. I do. After the widening slot 4a is formed, similarly to the above, the end of the second pull-in rope 7 is connected to an appropriate position of the endless cutter 3 on the ground, and as shown in FIGS. The second pulling rope 7 is parallel to the first pulling rope 5 on the other side, which is the excavation end side of the widening slot 4a, by circulating and driving from the side groove 1 toward the other side groove 2. And arrange them.

The second pulling rope 7 also extends to the ground side through the grooves 1 and 2 on both sides in the same manner as the first pulling rope 5. The leading ends of the pull-in ropes 5 and 7 extending from the other side groove 2 to the ground are wound around winding devices 8 and 9 installed near the opening ends of the side grooves 2, respectively.

Next, the other end of the first pull-in rope 5 extending from the one side groove 1 and the intermediate portion of the second pull-in rope 7 are attached to both ends of the front end of the belt-shaped sheet material 6 on the ground. Connect each one. In this case, as shown in FIGS. 10 and 11,
At the tip of the band-shaped sheet material 6, the tip edge has a mountain-shaped excavating blade 10a.
The distal end of the strip-shaped sheet material 6 is inserted into a narrow groove-shaped concave portion 10b provided at the base end portion of the fixing plate 10 formed as described above, and is clamped and fixed. As the fixing means, a large number of locking projections (not shown) which bite into the strip-shaped sheet material 6 are protruded from the inner surface opposite to the concave portion 10b, and one of the front and back plates forming the concave portion 10b of the fixing plate 10 is provided. This is performed by sandwiching the space between the two side plates so that the front plate can be freely opened and closed, or by attaching a plurality of screws or the like penetrating the tip of the belt-shaped sheet material 6 between the front and back surfaces of the fixed plate 10. be able to.

At both ends of the fixing plate 10, pull-in rope fixing tubular portions 10c and 10d are integrally provided, and one end of the first pull-in rope 5 is inserted into one of the fixing tubular portions 10c. In the fixed state, and the second fixed cylindrical portion 10d
The intermediate portion of the pull-in rope 7 is clamped and fixed in an inserted state. Further, as shown in FIG. 12, the guide rollers of the pull-in ropes are provided on the inner wall surfaces of the side grooves 1 and 2 at both open ends of the widened groove 4a communicating with both side grooves 1 and 2 and the upper end of the opening of one side groove 1. Install 11, 12, and 13 in advance.

In this state, when the above-mentioned winding devices 8 and 9 installed on the ground on the side of the other side groove 2 are driven to wind the pull-in ropes 5 and 7, the belt-shaped sheet is wound according to the winding. As shown in FIG. 13, after the tip of the material 6 is drawn into the side groove 1 from the upper end opening of the one side groove 1, it is inserted through the widening groove 4a from the one end opening of the widening groove 4a. The belt-like sheet material 6 moves from the other side groove 2 to the winding devices 8 and 9 side, is laid horizontally in the widening slot 4a, and is pulled out to the ground side through both side grooves 1 and 2 to be in a state. . At this time, the fixing plate 10 fixed to the leading end of the band-shaped sheet material 6 moves so as to precede the band-shaped sheet material 6, and the soil or the like existing in the widening slot 4a by the mountain-shaped leading edge excavating blade 10a. , And the strip-shaped sheet material 6 is smoothly drawn in.

After the band-shaped sheet material 6 having a constant width is laid in the widening slot 4a, the fixing plate 10 fixed to the end thereof is removed from the front end of the band-shaped sheet material 6, and one of the fixing plates 10 is removed from the widening slot 4a. Strip-shaped sheet material 6 extending to the side groove 1
Is cut in place and the fixed plate 10 is attached to the cut end to prepare for the next laying. Further, during the operation of pulling in the band-shaped sheet material 6, the endless cutter 3 is again moved in the horizontal direction while being driven so as to be continuously moved in the horizontal direction so that the band-shaped sheet material 6 can be inserted into the widened groove 4a. Drill 4b. In addition, when excavating a slot in the ground by the endless cutter 3, water is supplied to the endless cutter 3. If this supply is provided by spraying water on an appropriate portion of the endless cutter 3 or the like, the endless cutter 3 circulates in a state where water is attached to the endless cutter 3.

After the widening slot 4b is excavated, the pull-in rope 7a is inserted into the other end of the excavation end side in the same manner as described above.
The intermediate portion of the pull-in rope 7a and the end of the second pull-in rope 7 are respectively inserted into both end fixed cylindrical portions 10c and 10d of the end fixing plate 10 of the belt-shaped sheet material 6, and (1) After the winding device 8 of the pull-in rope 5 is transferred for winding the pull-in rope 7a, the band-shaped sheet material 6 is inserted into the widening slot 4a by driving both the winding devices 8, 9. It is to be laid.

As described above, the endless cutter 3 disposed at a desired depth from the ground surface to the ground along the length direction of the side grooves 1 and 2 can be laid on the strip-shaped sheet material 6. .. Are successively excavated and formed by laterally moving each distance, and in accordance with the formation, the widening slots 4a are pulled while pulling the tip of the strip-shaped sheet material 6 with a pair of pull-in ropes. , 4b... Are successively drawn and buried, and a series of horizontal belt-like sheet materials 6, 6 as drain materials are placed in the ground at a desired depth position between the side grooves 1, 2. ... is laid.

In addition, as shown in FIG. 15, a drain layer composed of a multi-layered horizontal band-shaped sheet material 6 is formed in the ground A by sequentially changing the installation depth position of the endless cutter 3 in the laid state. Can be. Incidentally, both ends of the belt-shaped sheet material 6 may be cut to a length reaching the side grooves 1 and 2 as shown in FIG. After the horizontal strip-shaped sheet material 6 serving as the drain material is buried in the ground to be improved in this way, the ground A is compacted by the load of the embankment 14 or the like.

Next, FIGS. 17 and 18 show a specific example of an apparatus in which the endless cutter 3 is laterally moved so that horizontal widening slots 4a and 4b can be excavated at a desired depth in the ground. , These side grooves 1, 2
The horizontal guide rails 15, 16 are fixed in the length direction of the
Is mounted on a plurality of guide pulleys 20 to 23 rotatably supported on the movable bases 17 and 18 through a drive device 24 of an endless cutter 3 comprising a wire saw disposed on the ground. It is obtained by hanging the cutter 3.

That is, the endless cutter 3 is a driving device.
After being extended from 24 to pulleys 20 and 20 which are pivotally supported on the front end upper surfaces of the both-side movable frames 17 and 18, are extended to pulleys 21 and 22 which are pivotally supported on the upper and lower outer surfaces of the both-side movable frames 17 and 18. And
Further, the endless cutter 3 running between the pulleys 23 and 23 is extended between the pulleys 23 and 23 pivotally supported on the rear end lower surface.
4b ... is to be excavated.

Prior to excavating the widening slot 4a, as described above, the vertical slot 4 must be excavated to the depth of the widening slot 4a.
Before the disposition of the movable frames 15, 16 and the movable frames 17, 18, the endless cutter 3 may be driven down from the ground surface and excavated by the horizontal traveling portion. After the excavation of the slot 4, the endless cutter 3 is circulated in one direction by the driving device 24 and the both-side movable mounts 17 and 18 are moved by the guide rails 15 and 16.
Is moved positively along appropriate driving means along with, and the driving device 24 is also moved in the same direction on the ground via a guide rail or the like in synchronization therewith. In addition, the two-sided mobile mounts 17, 18
By appropriately changing the length between the upper and lower pulleys 20 and 23 provided in the above, a widening slot can be excavated at a depth position corresponding to the length.

In the above embodiment, the method of embedding the strip-shaped sheet material 6 as a drain material in a layered manner from the ground in the soft ground has been described, but the strip-shaped sheet material 26 for reinforcement is embedded in the embankment by the same method. Can be buried.
That is, FIG. 19 is a cross-sectional view in which a plurality of layers of reinforcing strip-like sheet members 26 are embedded on both sides of the embankment B over the entire length, and FIG. In order to embed the band-shaped sheet material 26, first, a trench 31 extending from the embankment B to the bottom surface is excavated over the entire length. In this case, in the above embodiment, the side grooves 1 and 2 are excavated at appropriate intervals. However, since the side surface of the embankment B is exposed to the space, the space is used without providing the other side groove. .

The subsequent steps are the same as those in the above embodiment. At one end of the embankment B, the slope C of the embankment B and the gutter are used.
After the widening slot is excavated with the endless cutter 3 in between, the pull-in ropes are juxtaposed at both ends of the widening slot, and one end of the pull-in rope is wound up and connected to the other end. The strip-shaped sheet material 26 is drawn and buried in the widening slot, and this is sequentially repeated in the length direction of the embankment B. Similarly, in the ground on the other side of the embankment B,
By excavating the side groove 32, the band-shaped sheet material 26 can be embedded in the ground between the side groove 32 and the other side surface. In addition, it is possible to embed a ground reinforcing band-like sheet material in a cut by using this method.

The belt-shaped sheet material 6 as a drain material buried in the soft ground includes paper drain, plastic drain, geotextile, and the like. , Punched metal, geotextile, and other synthetic resin strips. Further, according to the present invention, it is possible to bury a belt-like sheet material serving as a water impervious wall in the ground. Further, in the method of embedding the reinforcing strip-shaped sheet material or the impermeable wall-forming strip-shaped sheet material as described above, if both sides grooves 1 and 2 are filled with a stable liquid such as muddy water, the two side grooves 1 2, a stable liquid film layer is formed on the excavation surface to prevent collapse of the groove. Similarly, when a stable liquid such as muddy water is supplied when the endless cutter 3 excavates the groove, the excavation of the groove is performed. The surface can be protected by a film layer of a stabilizing liquid, and a slot can be formed through which the belt-shaped sheet material can be smoothly inserted.

[0028]

As described above, according to the present invention, an appropriate depth portion of the ground is excavated by an endless cutter over a predetermined length section, and the endless cutter is laterally moved to widen the slot. After connecting the pull-in ropes on both sides of the widening slot and connecting the strip-like sheet material for ground improvement or reinforcement to these pull-in ropes extending out of the ground, the pull-in ropes The belt-like sheet material is pulled into the widening slot by embedding the tip of the ground from the outside of the ground, and buried in it. Since the strip-shaped sheet material can be buried in a horizontal state well, and the long strip-shaped sheet material is inserted into the widening slot, the widening groove can be used regardless of the length of the widening slot. Belt sheet in the hole It can be reliably embedded,
The sheet material can be buried horizontally over a wide area at one time.

Furthermore, since the widened slot is cut and formed by an endless cutter such as a wire saw, it is possible to excavate not only soft ground but also relatively hard ground smoothly. Since the endless cutter is moved horizontally in the horizontal direction, widened slots having a constant width can be sequentially and accurately formed, and a strip-shaped sheet material having a width corresponding to the widened slots can be inserted. And laying work can be easily performed. In addition, the excavation work of the next widening slot by the lateral movement of the endless cutter can be performed before the work of laying the band-shaped sheet material in the widening slot, so that workability and workability are improved, and the construction period is shortened. It can be planned.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a gutter excavated in the ground,

FIG. 2 is a plan view thereof,

FIG. 3 is a cross-sectional view showing a state of excavation of a slot by a wire saw;

FIG. 4 is a plan view showing a state where a first pull-in rope is provided.

FIG. 5 is a longitudinal side view thereof,

FIG. 6 is a plan view showing a step of forming a widened slot;

FIG. 7 is a longitudinal side view thereof,

FIG. 8 is a plan view showing a state in which a pull-in rope is provided at the other end of the widening slot.

FIG. 9 is a longitudinal side view thereof,

FIG. 10 is a plan view showing a connecting portion between the pull-in rope and the belt-shaped sheet material,

FIG. 11 is a longitudinal sectional front view thereof,

FIG. 12 is a vertical front view of a guide roller disposition portion,

FIG. 13 is a plan view showing a drawing process of the band-shaped sheet material,

FIG. 14 is a longitudinal side view thereof,

FIG. 15 is a longitudinal sectional front view of a state in which a plurality of layers of a belt-like sheet material are buried in the ground,

FIG. 16 is a longitudinal sectional front view showing a modified example thereof;

FIG. 17 is a simplified vertical sectional front view showing an excavating device for a widened slot;

FIG. 18 is a plan view thereof,

FIG. 19 is a longitudinal sectional front view showing a state in which a reinforcing band-like sheet material is embedded in an embankment;

FIG. 20 is a side view thereof.

[Explanation of symbols]

 1, 2 side groove 3 endless cutter 4 slot 4a, 4b widening slot 5, 7, pull-in rope 6 belt-shaped sheet material

Claims (2)

(57) [Claims] 1. Using an endless cutter such as a wire saw, a slot is drilled at an appropriate depth in the ground over a desired length section, and a first pull-in rope is horizontally inserted into the slot. Forming a horizontal widening slot by laterally moving the endless cutter in the direction in which the slot widens, and in the other side of the horizontal widening slot parallel to the first pull-in rope. Arranging a second pull-in rope; and first and second extending ropes extending from one end of the horizontal widening slot to the outside of the ground.
After connecting the tip of the strip-shaped sheet material to the second pull-in rope, the first and second pull-in ropes extending out of the ground from the other end side of the horizontal widening slot are pulled to horizontally widen the strip-shaped sheet material. And laying the belt-shaped sheet material in a slot. 2. A step of forming a horizontal widening slot having a desired width by lateral movement of an endless cutter, and a pulling rope provided side by side at both ends of the horizontal widening slot having a predetermined width outside the ground at one end side of the slot. A step of connecting the leading end of the strip-shaped sheet material, and then pulling the pull-in rope material from outside the ground at the other end side of the slot, drawing the strip-shaped sheet material into the horizontal widening slot, and laying the same. The method for horizontally burying a belt-shaped sheet material in the ground according to claim 1.