JP3728426B2 - Method of laminating ground improvement material and weighing hopper used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spraying method and a spraying device for a ground improvement material (ground improvement agent) that solidifies soft ground or soft soil.
More specifically, the present invention relates to a method for laminating a ground improvement material in which a powdery or granular solidified material is sprayed over the entire ground of soft ground and laminated to a uniform thickness, and a measuring hopper used therefor.
[0002]
[Prior art]
Currently, as a ground improvement material for soft ground having a high water content ratio, for example, a solidification method for solidifying soft soil by spreading a solidification material such as a cement-based solidification material is widespread.
The most important point in this solidification treatment is to uniformly mix the soft soil and the solidified material. For this purpose, the solidified material needs to be laminated to a uniform thickness over the entire surface of the soft ground.
On the other hand, the solidification material is transported by a bag pack (usually 1t pack) in which the solidification material is packed into a packaging bag such as a flexible container (flexible container) or a paper bag by a fixed amount, and is transported by a pressure-feed vehicle without being packed in a bag. This bag pack is more expensive than the rose product by the cost of the bag and the labor cost for the bagging operation.
For this reason, the cheapest method of spreading the solidified material is to discharge the solidified material pumped by air pressure from the tank truck transported to the construction site through the hose toward the entire ground in the construction area. It was general.
[0003]
[Problems to be solved by the invention]
However, in such a conventional ground improvement material laminating method, the solidified material is scattered all over the ground in the construction area, and therefore, the laminated thickness of the spread solidified material partially varies. As a result, there was a problem that the entire ground in the construction area could not be solidified in a uniform state.
In particular, the cement-based solidified material is a micron-sized fine powder, so that it rises to the ground when sprayed, and the dust thus contaminates not only the work area but also the surrounding area.
Therefore, it is also considered to equalize the solidified material by placing a plurality of bagging packs at equal intervals over the entire construction area of the soft ground and spraying these bagging packs manually. However, in this case, since a large amount of bag packs are used, the amount of bag packing becomes expensive, and after spraying, the packaging bags remain and become industrial waste, and it takes time and money to dispose of them. There is a problem that it takes.
[0004]
The invention according to claim 1 of the present invention aims to equalize the thickness of the solidified material without using a bag pack.
In addition to the object of the invention described in claim 1, the invention described in claim 2 aims at facilitating the weighing and spraying operations of the solidified material.
The invention described in claim 3 is intended to accurately measure the solidified material with a simple structure in addition to the object of the invention described in claim 1 or 2.
In addition to the object of the invention described in claim 3, the invention described in claim 4 is intended to accurately measure from the see-through window by preventing unevenness on the solidified material deposition surface. is there.
In addition to the object of the invention described in claim 3 or 4, the invention described in claim 5 aims to prevent dust generation of the solidified material.
[0005]
[Means for Solving the Problems]
In order to achieve the above-described object, the invention according to claim 1 of the present invention includes a step of dividing the entire ground of the construction area of the soft ground into small areas of the same area, and the solidified material is made into a predetermined capacity by a weighing means. It is characterized by comprising a step of weighing, and a step of spraying the weighed predetermined volume of solidified material into each small area and leveling it flat without protruding from the small area.
According to a second aspect of the invention, in the configuration of the first aspect of the invention, the weighing means is a weighing hopper, and a solidifying material is supplied and deposited in the weighing hopper, and the height of the pile reaches a predetermined position. At that time, the supply of the solidifying material is stopped, and a configuration in which all of the solidifying material deposited from the opening / closing port opened on the bottom surface is dispersed is added.
According to a third aspect of the present invention, in the weighing hopper used in the method for laminating the ground improvement material according to the first or second aspect, the height of the solidified material supplied to the inside thereof is set at a predetermined height position of the side wall. A fluoroscopic window for confirming from the outside is provided.
According to a fourth aspect of the present invention, in the configuration of the third aspect of the present invention, a solidification material supply pipe communicating with the solidification material supply source is inserted vertically from the upper end opening side of the side wall toward the center of the bottom surface. The supply pipe is characterized in that a plurality of solidified material discharge holes are opened in the vertical direction while changing the position in the circumferential direction.
According to a fifth aspect of the present invention, in the configuration of the third or fourth aspect of the present invention, the solidified material is pumped from the solidified material supply source by air pressure into the side wall by a supply pipe, and the upper end opening of the side wall is solidified. It is characterized in that a configuration in which a material is covered with a ventilation sheet that cannot pass through is added.
[0006]
[Action]
The invention of claim 1 divides the entire ground of the construction area of the soft ground into small areas of the same area, and measures the solidified material to a predetermined capacity with a measuring means, and then measures the measured predetermined volume of the solidified material to each small area. The solidification material 1 is laminated | stacked by uniform thickness over the whole ground of a construction range by each spraying in an area | region and leveling flat so that it may not protrude from there.
According to a second aspect of the present invention, in the configuration according to the first aspect, the weighing means is a weighing hopper, the solidifying material is supplied and deposited in the weighing hopper, and the deposition height reaches a predetermined position. Since the supply of solidification material was stopped at that time and all the solidification material deposited from the opening / closing port opened on the bottom surface was added, the accumulated height of the solidification material supplied into the weighing hopper was predetermined. By stopping the supply of the solidifying material when the position is reached, it is detected that the amount of solidified material accumulated has reached a preset capacity. All of the material is sprayed from the opening on the bottom.
According to a third aspect of the present invention, in the configuration according to the first or second aspect, the weighing hopper confirms a deposition height of the solidified material supplied from the outside at a predetermined height position of the side wall. Therefore, the height position of the solidified material deposited inside the side wall can be visually detected from the outside of the side wall through the fluoroscopic window.
According to a fourth aspect of the present invention, in the configuration of the third aspect, the solidification material supply pipe communicating with the solidification material supply source is inserted and arranged in the vertical direction from the upper end opening side of the side wall toward the center of the bottom surface. In this supply pipe, a configuration in which a plurality of solidification material discharge holes are opened in the vertical direction while changing the position in the circumferential direction is added, so that the solidification material is supplied from the solidification material supply source to the supply pipe. As a result, the solidified material 1 is discharged from the plurality of discharge holes that are opened in the vertical direction while changing the position in the circumferential direction, and the solidified material accumulation surface is flattened without being partially offset, and remains in a substantially horizontal state. To rise.
According to a fifth aspect of the present invention, in the structure according to the third or fourth aspect, the solidification material is pumped from the solidification material supply source to the inside of the side wall by air pressure from a supply pipe, and the upper end opening of the side wall is solidified. Since a structure covered with a ventilation sheet that cannot pass through is added, the air supplied to the inside of the side wall for pumping the solidified material from the solidified material supply source passes through the dustproof sheet in the upper end opening to the outside. It flows out but does not pass through the solidified material.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
In this embodiment, as shown in FIGS. 1 to 4, as a means for dividing the entire ground A1 in the construction area of the soft ground A into small areas A2 of the same area, powder such as lime is applied to the entire ground in the construction area A1. By marking the body linearly, it marks the plane rectangular grid, trapezoid, triangle, etc., and shows the case where the weighing means 2 of the solidified material 1 to be sprayed on these small areas A2 ... is a weighing hopper. is there.
[0008]
The weighing hopper 2 includes a side wall 2a having at least a lower portion formed in a funnel shape, an upper surface opening portion 2b for supplying contents opened at an upper end thereof, and an opening / closing port 2c opened at the bottom surface. It has a conventionally well-known structure that is movably suspended by an elevator (not shown) such as a crane. In this embodiment, the opening / closing port 2b is opened and closed by manual operation of the operation lever 2d while being lifted by a crane.
[0009]
The side wall 2a of the weighing hopper 2 is provided with a see-through window 2e for seeing through the accumulated height of the solidifying material 1 supplied to the inside at a predetermined height position, and the side wall is passed through the see-through window 2e. An operator can visually detect from the outside of 2a, and the transparent window 2e may be simply penetrated, or may be closed by attaching a transparent plate 2e 'made of glass or synthetic resin, for example. good.
[0010]
In the case of the illustrated example, two of the see-through windows 2e are opened at a position near the upper end of the side wall 2a and at a position lower than the see-through window 2a. When the deposition surface of the solidifying material 1 rises to a position where it can be seen through, it is set so that the amount of solidifying material 1 deposited in the side wall 2a is 1 t, and the height through which the high fluoroscopic window 2e can be seen through is set. When the deposition surface of the solidifying material 1 rises to this position, the amount of the solidifying material 1 deposited in the side wall 2a is set to 1.5 t.
[0011]
Further, in the weighing hopper 2, the supply pipe 3 of the solidified material 1 communicating with the supply source of the solidified material 1 is inserted and arranged in the vertical direction from the upper end opening 2b side of the side wall 2a toward the center of the bottom surface. A plurality of discharge holes 3 a of the solidifying material 1 are opened in the pipe 3 in the vertical direction while changing the position in the circumferential direction.
[0012]
In the case of the present embodiment, the base end of a hose H communicating with a tank car or a pressure feed car (not shown) corresponding to the supply source of the solidifying material 1 is connected by piping, and further, as shown in FIG. The pipe 3 is bent into a substantially L shape, and is supported by penetrating the upper end of the side wall 2a, thereby connecting the pipe 3 to the distal end of the hose H to the base end 3b protruding to the outside of the side wall 2a. A plurality of discharge holes 3a are opened by vertically disposing a tip 3c projecting into the side wall 2a.
[0013]
Furthermore, the upper surface opening 2b of the weighing hopper 2 is covered with a ventilation sheet 2f through which the solidifying material 1 cannot pass. The ventilation sheet 2 has excellent air permeability and the solidifying material 1 is a micron such as a cement-based solidifying material. It is preferable to use a fine powder of unit that hardly passes.
In the case of the illustrated example, as shown in FIGS. 1 and 2, it is fixed by a metal strip 2g such as iron so as to be exchangeable.
[0014]
Furthermore, as shown in FIG. 3, the opening / closing port 2c of the weighing hopper 2 is covered with a cylindrical anti-scattering cover 2h around the opening / closing port 2c in order to prevent the solidifying material 1 from flying up when discharged. Preferably, if the scattering prevention cover 2h is formed of a deformable material such as cloth, the solidified material 1 discharged as shown by the one-dot chain line in FIG. 3 when the weighing hopper 2 is suspended by a crane or the like. It hangs so as to surround it and can be folded as shown by a two-dot chain line in FIG.
[0015]
On the other hand, in at least one or a plurality of the small areas A2... Dividing the entire ground area A1 of the construction area, the scale 4 is disposed so as not to be displaced at the end of each small area A2, and the scale 4 is solidified. Although not shown in the drawing, a scale for displaying the height from the ground may be provided by forming it higher than the stacking height of the solidified material 1.
[0016]
In the illustrated example, as shown in FIG. 1 and FIG. 2, four plate-like scales 4... Are placed at four corners of the small area A2, but the present invention is not limited to this. One continuous scale 4 may be arranged along the outer periphery of the small section A2, and it may be a foldable structure so as to be advantageous for carrying.
[0017]
Next, the lamination method of such ground improvement material is demonstrated according to process order.
First, as shown in FIG. 2, the entire ground A1 of the construction area of the soft ground A is divided into small areas A2... Having the same area by marking, and the weighing hopper 2 is moved onto one of these small areas A2. And place it horizontally.
[0018]
In this state, supply of the solidified material 1 is started via a hose H by air pressure from a tank car or a pressure-fed vehicle (not shown) corresponding to the supply source of the solidified material 1, and a supply pipe 3 connected to the hose H To the inside of the side wall 2a of the weighing hopper 2.
[0019]
Thereafter, the height position of the solidified material 1 deposited inside the side wall 2a was visually confirmed by the operator from the outside of the side wall 2a through the transparent window 2e, and the deposited height of the solidified material 1 reached a predetermined position. If the supply of the solidifying material 1 is stopped at the time, it is detected that the accumulation amount of the solidifying material 1 has reached a preset capacity (1 t or 1.5 t).
[0020]
In this state, as shown in FIG. 1, the weighing hopper 2 is lifted by a crane or the like so that an appropriate interval is provided between the ground and the small area A2, and the bottom surface is opened and closed while being moved laterally within the small area A2 as necessary. If the opening 2c is opened, all of the solidified material 1 weighed by the weighing hopper 2 is sprayed into the small area A2.
[0021]
Thereafter, the spread solidified material 1 is flattened by an operator using a leveling plate or the like so as not to protrude from the small area A2.
At this time, if the scale 4 having a height corresponding to the stacking height of the solidified material 1 is arranged at the end of the small area A2 so as not to be displaced, a slight error occurs in the measurement of the solidified material 1 by the weighing hopper 2. Even so, this error can be checked by the scale 4, and the excess or deficiency of the solidified material 1 can be corrected quickly.
[0022]
After that is completed, the above-described operation is repeated for each sub-area A2..., Whereby the solidified material 1 is laminated to a uniform thickness over the entire ground surface A1 of the construction area, so that a bag pack is used. The laminated thickness of the solidifying material 1 can be equalized without performing the process [0023]
After that, although not shown, for example, stirring and mixing of the solidified material 1 with a rotary stabilizer, etc., leveling with a bulldozer, etc., and rolling with a vibrating roller, etc. are sequentially performed. A part of the entire ground surface A1 is dug up to check the ground improvement depth.
[0024]
Further, in the case of the present embodiment, since the weighing hopper is used as the weighing means 2, the supply of the solidifying material 1 is stopped when the deposition height of the solidifying material 1 supplied therein reaches a predetermined position. When it is detected that the accumulation amount of the solidifying material 1 has reached a preset capacity, and the opening / closing port 2c is opened in this state, all of the measured solidifying material 1 is sprayed from the opening / closing port 2c on the bottom surface. The
As a result, there is an advantage that the weighing work and the spreading work of the solidified material 1 can be facilitated.
[0025]
Further, since the see-through window 2e is provided at a predetermined height position on the side wall 2a, it can be detected visually from the outside of the side wall 2a through the see-through window 2e.
As a result, there is an advantage that the solidifying material 1 can be accurately measured with a simple structure.
[0026]
Then, if the solidifying material 1 is supplied from the supply source of the solidifying material 1 to the supply pipe 3, the solidifying material 1 is discharged from the discharge holes 3a which are opened in the vertical direction while changing the position in the circumferential direction. As a result, the deposition surface of the solidifying material 1 is flattened without being partly shifted, and rises in a substantially horizontal state.
As a result, there is an advantage that unevenness can be prevented from occurring on the deposition surface of the solidifying material 1 and measurement can be accurately performed from the fluoroscopic window 2c.
[0027]
Further, the air supplied to the inside of the side wall 2a for pumping the solidified material 1 from the supply source of the solidified material 1 flows out through the dustproof sheet 2f of the upper end opening 2b, but does not pass through the solidified material 1.
As a result, there is an advantage that dust generation of the solidified material 1 can be prevented.
[0028]
In the previous embodiment, as a means for dividing the entire ground area A1 of the construction area of the soft ground A into small areas A2,... Of the same area, powder such as lime is linearly formed over the entire ground area of the construction area A1. Although the case of marking in a grid pattern has been shown, the present invention is not limited to this. For example, it is possible to classify by placing a frame of a size surrounding the outer periphery of each small area A2 or a lattice-shaped frame. Further, it is preferable that these frames are formed so as to have a scale having a height that matches the stacking height of the solidifying material 1.
Moreover, although the case where the weighing | measuring means 2 of the solidification material 1 is a measurement hopper was shown, it is not limited to this, A substitute may be used if it has the same function as the measurement hopper mentioned above.
[0029]
【The invention's effect】
As described above, the invention according to claim 1 of the present invention divides the entire ground of the construction area of the soft ground into small areas of the same area, and after weighing the solidified material to a predetermined capacity by the weighing means, The solidified material 1 is laminated to a uniform thickness over the entire ground of the construction range by spraying a predetermined amount of the solidified material that has been weighed into each small area and leveling it flat so that it does not protrude from there. Therefore, the laminated thickness of the solidified material can be equalized without using a bag pack.
Therefore, compared to the conventional method in which the solidified material is sprinkled all over the ground in the construction area, the soft ground and the solidified material can be mixed uniformly to solidify the entire ground in the construction area to a uniform state. Even if solidified material is sprayed, it does not fly up to the ground as dust, and contamination of the work area and the surrounding area can be prevented.
In addition, compared to the case where multiple bag packs are placed at regular intervals and sprayed, the bag packs are not used, so there is no cost for bags, labor costs for bag packing operations, and packaging bag disposal costs. , Can be kept to the lowest cost.
[0030]
In addition to the effect of the invention of claim 1, the invention of claim 2 stops the supply of the solidifying material when the deposition height of the solidifying material supplied into the weighing hopper reaches a predetermined position. It is detected that the amount of the deposited material has reached a preset capacity, and by opening the opening / closing port in this state, all of the measured solidifying material is sprayed from the opening / closing port on the bottom surface. Weighing work and spraying work can be facilitated.
Therefore, the entire work can be performed quickly and the work period can be shortened.
[0031]
In addition to the effect of the invention of claim 1 or 2, the invention of claim 3 is simple because the height position of the solidified material deposited inside the side wall can be visually detected from the outside of the side wall through the transparent window. The solidified material can be accurately measured with a simple structure.
[0032]
In addition to the effect of the invention of claim 3, the invention of claim 4 is provided with a plurality of holes in the vertical direction while changing the position in the circumferential direction by supplying the solidification material from the supply source of the solidification material to the supply pipe. The solidified material 1 is discharged from the discharge holes, respectively, and the solidified material deposition surface is flattened without being partially offset and rises in a substantially horizontal state, so that the solidified material deposited surface is prevented from being uneven. Thus, it can be accurately measured from the perspective window.
[0033]
According to the fifth aspect of the present invention, in addition to the effect of the third or fourth aspect of the present invention, the air supplied to the inside of the side wall for pumping the solidified material from the solidified material supply source has a dustproof sheet at the upper end opening. Since it passes through and flows out to the outside, the solidified material does not pass through, so it is possible to prevent the solidified material from generating dust.
Therefore, the work can be performed in a residential area.
[Brief description of the drawings]
FIG. 1 is a perspective view of a method for laminating a ground improvement material according to an embodiment of the present invention, and shows a sprayed state of a solidified material.
FIG. 2 is a perspective view showing when a solidifying material is supplied.
FIG. 3 is a longitudinal front view of the weighing hopper.
FIG. 4 is a vertical side view of a weighing hopper.
[Explanation of symbols]
A Soft ground A1 Whole ground of construction area A2 Small area 1 Solidified material 2 Measuring means (measuring hopper) 2a Side wall 2b Upper end opening 2c Opening and closing port 2e Viewing window 2f Ventilation sheet 3 Supply pipe 3a Discharge hole

Claims (5)

In the laminating method of the ground improvement material which spreads the powdery or granular solidified material (1) over the entire ground of the soft ground (A) and laminates it to an equal thickness,
Dividing the entire ground (A1) of the construction area of the soft ground (A) into small areas (A2) of the same area;
A step of weighing the solidified material (1) to a predetermined volume by the weighing means (2);
A step of spraying the measured predetermined volume of solidified material (1) into each of the small areas (A2) and leveling them flat without protruding from the small areas (A2);
A method for laminating a ground improvement material, comprising: The weighing means (2) is a weighing hopper. The solidifying material (1) is supplied and deposited in the weighing hopper, and the supply of the solidifying material (1) is stopped when the deposition height reaches a predetermined position. The method for laminating a ground improvement material according to claim 1, wherein all of the solidified material (1) deposited from the opening and closing port (2c) opened on the bottom surface is dispersed. 3. The pile height of the solidified material (1) supplied to the inside of the weighing hopper (2) used in the ground improvement material laminating method according to claim 1 or 2 at a predetermined height position of the side wall (2a). A weighing hopper provided with a see-through window (2e) for confirming from the outside. The supply pipe (3) of the solidified material (1) communicating with the supply source of the solidified material (1) is inserted and deployed in the vertical direction from the upper end opening (2b) side of the side wall (2a) toward the center of the bottom surface, The measuring hopper according to claim 3, wherein a plurality of discharge holes (3a) of the solidifying material (1) are opened in the longitudinal direction in the supply pipe (3) while changing positions in the circumferential direction. The solidified material (1) is pneumatically fed from the supply source of the solidified material (1) to the inside of the side wall (2a) by the supply pipe (3), and the upper end opening (2b) of the side wall (2a) is solidified ( The weighing hopper according to claim 3 or 4, wherein 1) is covered with a ventilation sheet (2f) that cannot pass.

Images