JP4584043B2 - Surface treatment method for soft ground, surface treatment material and bag used therefor - Google Patents

Description

  The present invention relates to a surface treatment method for a soft ground for laying a surface treatment reinforcing material on soft ground such as cohesive soil to construct a soil covering or a soil structure, and a surface treatment material and a bag used for the method. is there.

If the soil is squeezed directly onto the soft ground of the clay, the soil may become unusable due to the load of the soil or the weight of the slagging machine, and the soil may become useless or the ground may break down and collapse. .
In order to prevent such a phenomenon, as a surface treatment method, a sheet method using fiber woven fabric as a laying material was invented in 1966, and then a laying method using a synthetic resin net as a laying material was developed ( Furthermore, several related methods have been developed, such as a rope sheet method for reinforcing a sheet, or a method combining a bamboo frame and a sheet or net.
In addition, solidification processing technology has been developed to stabilize the surface layer by adding and mixing a solidifying material such as cement to soft soil. Furthermore, as a technique for improving the surface layer of soft ground on land or in water, a bag of geotextile with a wide area and water permeability made of a tough, tensile-strength material is developed on the surface of the soft ground, There has been proposed a method of filling a solidified material such as a cemented cement and forming a flat solidified layer in which the hardened solidified material is integrally covered with a bag having tensile strength (see Patent Document 2).
In addition, a flexible planar reinforcing material such as a sheet or a net is laid on the soft ground, and at least one of the upper and lower surfaces of the planar reinforcing material is dewaterable and has a tensile strength. A flexible linear hollow body made of a high hose or the like is disposed or attached in advance, and the linear hollow body is filled with mortars to form a rigid reinforcing body such as a lattice, which is easy to lay. A rigid reinforcement body with a rigid frame structure disperses the earth and sand load loaded via the planar reinforcing material, and suppresses the breakage and deformation of the soft ground, and performs a stable cover work and embankment work for embankment. It has been developed (see Patent Document 3).
Furthermore, a lattice-like bag made of a tubular woven fabric on the upper surface and the lower surface of the planar reinforcing material is laid on the soft ground by the applicant's proposal. A surface treatment method for soft ground has also been developed in which a body is disposed and a rigid reinforcing body is formed by filling a solid body such as mortar into the lattice-shaped bag (Japanese Patent Application No. 2003-401053).

By the way, the key to the success of the construction method of laying a flexible planar reinforcing material such as a sheet or a net is the method of spreading earth and sand. The point is to prevent uneven settlement due to uneven embankment thickness and local settlement as much as possible. When the first layer is spread, the layer thickness is increased or uneven sedimentation is added. Then, it becomes difficult to correct this non-uniform state by rolling out the subsequent second layer.
For this reason, it has also been devised such as rolling out with a jet conveyor or water pumping out using a dredging pump, but once a depression due to uneven settlement occurs, it will promote concentration of local settlement, Management and adjustment becomes difficult.
Such troubles can not be prevented if the tensile strength of flexible planar reinforcing materials such as sheets and nets is a little large, but if the material to be laid is rigid and does not exhibit the load distribution effect, Basically it cannot be prevented.
The principle of the construction method that lays bamboo with a length of several meters on a grid with a 1m interval and lays a sheet on it is just to exert the load distribution effect, but procurement of bamboo and formation of bamboo frames There is a problem of workability related to installation on soft ground.
On the other hand, there is an attempt to expect the effect of a bamboo frame by directly solidifying the soft ground surface layer in a lattice shape with cement or the like, but the number of separate processes increases and the cost becomes high.
Also, the method of solidifying the entire surface layer portion and the method of filling a large bag with a cement-based solidifying material are expensive compared to the method of laying flexible planar reinforcing materials such as sheets and nets. Become.
The method described in Patent Document 3 can effectively suppress local settlement by load distribution, but it is necessary to fill mortars for each linear hollow body, and when there are a plurality of linear hollow bodies, One hose connected to the linear hollow body and the mortar pump, filling the mortar, closing the end of the hollow body and disconnecting the connection one by one, especially when the number of linear hollow bodies is large In addition, there is a problem that the construction time becomes longer and the cost increases.
Moreover, the surface layer processing method by the above-mentioned Japanese Patent Application No. 2003-401053 developed in order to solve this problem is that the mortar can be spread over the whole lattice bag body by the mortar filling operation from one place. It was excellent in workability.
However, when the laying area is remarkably increased, in the injection from one place, the resistance to the flow of the mortar at the intersection of the lattice-like bag gradually accumulates and the injection pressure required for filling gradually increases, and the intersection of the bag is broken. In addition, there is a problem that flow failure occurs due to dehydration of the mortar from the bag.
JP 2002-227178 A Japanese Patent Laid-Open No. 11-152735 JP 2004-137778 A

  In view of the problems of these conventional methods for surface treatment of soft ground, the present invention does not increase the injection pressure when filling a plurality of bags constituting the reinforcing material for surface treatment with a fluidized solidifying material. In addition to being able to be filled at once, it is possible to roll the surface treatment reinforcing material into a roll or fold it and transport it in a compact state, improving the work efficiency of surface treatment work on soft ground An object of the present invention is to provide a surface treatment method for soft ground, a surface treatment material and a bag used for the method.

  In order to achieve the above object, the surface treatment method for a soft ground according to the present invention includes a base end side bag body into which a fluidized solidifying material is introduced, and two or more rows in a direction perpendicular to the base end side bag body. And a branch-side bag body that is arranged in a comb shape and communicates with the base-end side bag body so that the fluidized solidifying material is introduced from the base-end side bag body. A reinforcing material for surface layer treatment is laid flat on a soft ground, and a rigid reinforcing material is formed by filling a flowable solidifying material in the surface layer processing bag.

  In this case, the surface treatment bag is disposed in the length direction and the width direction of the surface treatment bag, and the two proximal end bags communicated with each other, and the 2 A plurality of branch side bags respectively communicating with the base end side bags can be configured in a lattice shape.

  Moreover, the said branch side bag body can be couple | bonded partially over the whole surface of the planar reinforcing material which comprises the reinforcing material for surface processing.

  The soft ground surface treatment material used in the soft ground surface treatment method of the present invention includes a base end side bag body into which the fluidized solidifying material is introduced, and a direction perpendicular to the base end side bag body. It is arranged in two or more rows, and is configured in a comb shape with a branch side bag body that communicates with the base end side bag body so that a fluidized solid material is introduced from the base end side bag body. A surface treatment bag, a surface reinforcing material arranged on an upper surface or a lower surface of the surface treatment bag, and a fluidized solidified material filled and solidified in the surface treatment bag. And

  Also, the two base end side bags that are arranged in the length direction and the width direction of the planar reinforcing member and that communicate with each other, and communicate with the two base end side bags, respectively. It is possible to include a surface layer processing bag body configured in a lattice shape with the plurality of branch side bag bodies.

  Moreover, the said branch side bag body can be couple | bonded partially over the whole surface of the said planar reinforcement.

  The soft ground surface treatment bag body used in the soft ground surface treatment method of the present invention includes a base end side bag body into which a fluidized solidifying material is introduced, and a right angle to the base end side bag body. It is arranged in two or more rows in the direction, and is configured in a comb shape with a branch side bag body that communicates with the base end side bag body so that the fluidized solidifying material is introduced from the base end side bag body. It is characterized by that.

  Moreover, a large diameter part can be formed in the said base end side bag body, and it can join with a branch side bag body in this large diameter part.

According to the surface treatment method for soft ground of the present invention and the surface treatment material and bag body used therefor, a base end side bag body into which the fluidized solidifying material is introduced, and a direction perpendicular to the base end side bag body 2 A surface layer that is arranged in rows or more and is configured in a comb shape with a branch side bag body that communicates with the base end side bag body so that a fluidized solid material is introduced from the base end side bag body By laying a surface treatment reinforcing material including a treatment bag body on a soft ground in a flat shape and filling the surface treatment bag body with a fluidized solidifying material to form a rigid reinforcement body, the bag body It can be filled at once without extremely increasing the injection pressure of the fluidized solidifying material, and without causing breakage of the bag or poor flow due to local dehydration from the fluidized solidifying material through the bag. It is possible to improve the work efficiency of surface treatment work on soft ground.
In addition, since the entire surface treatment reinforcing material is flexible and does not have a part that is bulky, the surface treatment reinforcing material can be wound in a roll shape or folded to be conveyed in a compact state.

  Further, two base end side bags that are disposed in a length direction and a width direction of the surface layer processing bag body, and whose one ends communicate with each other, By forming a grid with a plurality of branch side bags each communicating with the base side bag, it is possible to fill the branch side bags constituting the grid bag with a fluidized solidifying material at a time. It is possible to improve the work efficiency of surface treatment work on soft ground.

Further, by partially bonding the branch side bag body over the entire surface of the planar reinforcing material constituting the surface treatment reinforcing material, the load of the soil squeezed out on the planar reinforcing material flows. The load is distributed by being supported by the branch side bag body which is filled with the conductive solidifying material and has rigidity, and the occurrence of uneven settlement can be prevented.
Conversely, even if the ground around the soft ground rises, load distribution is achieved by supporting the force of the uplift by a fluid-solidifying material and supporting it by a branch side bag body having rigidity. This can prevent the occurrence of uneven ridges.

  Further, according to the surface treatment material for soft ground of the present invention, the base end side bag body into which the fluidized solidifying material is introduced and the base end side bag body are arranged in two or more rows in a direction perpendicular to the base end side bag body. And a surface layer processing bag body configured in a comb shape with a branch side bag body that communicates with the base end side bag body so that a fluidized solidifying material is introduced from the base end side bag body, By providing a sheet reinforcing material arranged on the upper surface or the lower surface of the processing bag body and a fluidized solidifying material filled and solidified in the surface processing bag body, the filled fluidized solidifying material is provided. After curing, it can function as part of a rigid load support structure.

  Moreover, according to the surface layer processing bag body of the soft ground of the present invention, the base end side bag body into which the fluidized solidifying material is introduced and the base end side bag body are arranged in two or more rows in a direction perpendicular to the base end side bag body. By arranging in a comb shape with a branch side bag body that is arranged and communicated with the base end side bag body so that the fluidized solidifying material is introduced from the base end side bag body, the whole is flexible. Since there is no bulky part, it can be rolled or folded to be transported in a compact state.

  Further, by forming a large diameter portion in the base end side bag body, and joining to the branch side bag body in the large diameter portion, it is easy to perform sewing processing and adhesion processing of the joint portion, the strength of the joint portion is high, In addition, it is possible to smoothly distribute the flowable solidifying material at the joint portion.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a surface treatment method for soft ground according to the present invention, a surface treatment material and a bag used for the method will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a surface treatment method for soft ground according to the present invention, and a surface treatment material and a bag used for the method.
This surface treatment method for a soft ground is a bag body filled with a sheet reinforcement 11 made of a woven fabric or a synthetic resin sheet as a reinforcement 1 for a surface treatment, and a fluidized solidifying material such as mortar. The surface treatment bag bodies 12 and 13 are used, and this surface treatment reinforcing material 1 is laid flat on the soft ground G and is fluidized in the surface treatment bag bodies 12 and 13. A rigid reinforcing body is formed by filling a solidifying material.
Of these, the surface treatment bag bodies 12 and 13 filled with the fluidized solidifying material are the base end side bag bodies 12a and 13a into which the fluidized solidifying material is introduced, and the base end side bag bodies 12a and 13a. Are arranged in two or more rows in a direction perpendicular to the base, and the fluidized solidification material is introduced from the base end side bag bodies 12a and 13a in communication with the base end side bag bodies 12a and 13a, respectively. Each of the branch side bags 12b and 13b is configured in a comb shape.

  In laying the surface layer treatment reinforcing material 1 in a flat shape on the soft ground G, various methods can be adopted according to the properties of the soft ground G. The surface layer treatment reinforcing material 1 is introduced into the base side bag body 12a of the surface layer processing reinforcement material 1 and the fluidized solidifying material fluid is introduced into the branch side bag body 12b from the base side bag body 12a. By introducing the fluidized solidifying material fluid, the branch side bag body 12b is inflated sequentially, so that it is developed and laid on the soft ground G in a planar shape.

By the way, in this embodiment, a sheet-like reinforcing material 11 made of a synthetic fiber woven fabric and a lattice-shaped surface treatment bag made up of comb-like surface treatment bags 12 and 13 are used as a bag. What is connected by a belt, a cord or the like at an arbitrary position such as a lattice point of the body is used.
As a result, the load of the soil squeezed out on the planar reinforcing material 11 causes the bag bodies 12 and 13 having rigidity by solidifying the filled fluidized solidifying material, specifically, the branch side bag body 12b. , 13b, load distribution is achieved, and uneven settlement can be prevented.
Conversely, when the ground around the soft ground G rises, the force of the rise is supported by the branch side bags 12b and 13b filled with the fluidized solidifying material via the planar reinforcing material 11 and having rigidity. By doing so, load distribution is achieved, and the occurrence of uneven bulges can be prevented.
In addition, as a coupling member used for the said coupling | bonding, for example, the code | cord | chord of tensile strength: 200kgf, diameter: 3mm, length: 500-1000mm is used, and a branch side bag is passed through two holes formed in the planar reinforcing material 11. The bodies 12b and 13b are connected. In the case of the net-like planar reinforcing material 11, it is not necessary to form a hole for passing the cord. Since the branch side bag bodies 12b and 13b are inflated by being filled with the fluidized solidifying material, the branch side bag bodies 12b and 13b are connected with a margin. The lattice points of the branch side bag bodies 12b and 13b are connected by putting a long cord diagonally at the intersection. Connect the other parts with short codes.
In addition, as the coupling member, for example, a belt having a tensile strength of 400 kgf, a width of 7 mm, and a length of 500 to 1000 mm can be used, and the central portion of the belt is previously sewn at a predetermined position of the planar reinforcing material 11. Try to keep it. The net-like planar reinforcing material 11 may be sewn in the same manner.

As another method for joining the planar reinforcing material 11 and the lattice-shaped surface treatment bag, as shown in FIG. 2, two slits 11a are formed in the planar reinforcing material 11, and the slits 11a are formed. For example, when weaving the planar reinforcing material 11, as shown in FIG. 3, a belt-shaped double woven portion 11b in which a plurality of monofilaments are woven is formed, as shown in FIG. A method of allowing the branch side bag bodies 12b and 13b to penetrate the belt-like double woven portion 11b can be employed.
The joining method for forming the latter belt-shaped double woven portion 11b does not form a hole or a slit in the planar reinforcing material 11, and therefore has an advantage of not reducing the strength of the planar reinforcing material 11 at the joint.
In addition, the coupling method using coupling members, such as a belt and a cord, can also be used in combination with these coupling methods.

In this example, the synthetic fiber woven fabric constituting the planar reinforcing material 11 is made of polyester fibers for both warp and weft, for example, dimensions: 12 m × 12 m, thickness: 0.38 mm, basis weight: 320 g / m. ^2. Strength: 250 kgf / 3 cm.

  The branch side bag bodies 12b and 13b of the surface layer processing bag bodies 12 and 13 are tubular woven fabrics having a constant diameter portion in the length direction and a large diameter portion larger than the diameter, and the diameter of the small diameter portion: 100 mm, large Diameter of diameter part: 150 mm and water permeability. Both the warp and weft of the tubular woven fabric are made of polyester fiber, the fineness (d): 1100, the number of strands: 2, the total number of warps 768, the density (lines / cm): the warp small diameter portion 24.5, the warp large diameter portion 16 .3, a weft small diameter portion 4.7, and a weft large diameter portion 8.5. This tubular woven fabric is a woven fabric composed of warps in the length direction and wefts spirally woven into the warp, and the tensile strength in the warp direction of the woven fabric is 1/2 or more times the tensile strength in the weft direction. In the present embodiment, it is 4 times or more in the small diameter portion and about 2 times in the large diameter portion.

  The joint portions between the base end side bag bodies 12a and 13a and the branch side bag bodies 12b and 13b are provided with slits having a length of 150 mm in the base end side bag bodies 12a and 13a. The end is assembled so that it joins there. Both can be joined by stitching or by adhesion with hot melt resin or the like.

The base end side bag bodies 12a and 13a may be a cylindrical fabric made of a synthetic fiber woven fabric having a soft and thin thickness, but are made of the same synthetic fiber woven fabric as that used for the branch side bag bodies 12b and 13b. By using a cylindrical woven fabric, the filled fluidized solidifying material can function as a part of a rigid load supporting structure after curing.
In this case, by joining the branch side bag body at the large diameter portion of the base end side bag body 12a, 13a, it becomes easy to perform sewing processing and bonding processing of the joint portion, and the strength of the joint portion is high. In addition, it is possible to smoothly distribute the flowable solidifying material in the joint portion.

By the way, in this embodiment, a surface layer processing bag body in a lattice shape is configured by combining two surface layer processing bag bodies 12 and 13 configured in a comb shape.
That is, the base end side bag body 12a into which the fluidized solidifying material is introduced, and two or more rows in the direction perpendicular to the base end side bag body 12a (in this embodiment, five rows. The interval is about 2 m. A branch side bag body 12b that is arranged side by side and communicates with the base end side bag body 12a so that the fluidized solidified material is introduced from the base end side bag body 12a; Thus, one comb-shaped bag body 12 is configured, and thereby, the flowable solidifying material can be efficiently introduced into the branch side bag body 12b.
Further, the base end side bag body 12a is connected to another base end side bag body 13a into which the fluidized solidifying material is introduced via a valve 25 as necessary, and this base end side bag body 13a. And two or more rows in the direction perpendicular to the base end side bag body 13a (parallel to the base end side bag body 12a) (in this embodiment, six rows. The interval is set to about 2 m. ) And a branch side bag body 13b that communicates with the base end side bag body 13a so that the fluidized solid material is introduced from the base end side bag body 13a, and the other comb-like bag The bag body 13 is configured so that the flowable solidifying material can be efficiently introduced into the branch side bag body 13b.
In the present embodiment, the leading end portion of the branch side bag body 12b is communicated with the branch side bag body 13b 'disposed at the tip portion, and the branch side bag body 13b is connected to the branch side bag body 12b. Although a fluid solidifying material is introduced into ', the distal end portion of the branch side bag body 12b and the branch side bag body 13b' can be shut off.

The base end side bag bodies 12a and 13a have a mixer 21 as fluidity solidifying material supply means 2 for introducing a fluidity solidification material such as mortar into the comb-shaped surface treatment bag bodies 12 and 13. The hopper 22, the pump 23, the flow meter 24, and the valve 25 are connected.
And the load cell 27 is arrange | positioned in the diagonal position of the injection port 14 of the fluid solidification material of the bag bodies 12 and 13 (In this case, a load cell can also be arrange | positioned in another position or several positions as needed. The data processing and control device 26 determines the pressure of the fluidized solidified material detected by the load cell 27 and the pressure of the fluidized solidified material detected by the load cell 28 provided on the fluidized solidified material supply side. It is possible to grasp and control the supply state of the fluidized solidified material by the fluidized solidified material supply means 2.
Here, the supply of the fluidized solidified material by the fluidized solidified material supply means 2 can be performed simultaneously on both the bag bodies 12 and 13, but the fluidized solidified material is introduced only into the base end side bag body 12a first. When the surface layer reinforcing material 1 is expanded and laid on the soft ground G in a planar shape by sequentially expanding the material, it is preferable to carry out in the following order.
When the surface treatment reinforcing material 1 is deployed, the fluidized solidifying material is injected only in the 0 ° direction (only the bag body 12), and after the surface treatment reinforcing material 1 is deployed, the valve 25 is switched to the 90 ° direction (the bag). The body 13) is also injected. Then, after the fluidized solidifying material has spread over the entire bag bodies 12 and 13, the switching of the valve 25 is repeated about 4 to 5 times to supply the fluidized solidifying material (formation of a cake layer).
The supply pressure and flow rate of the fluidized solidified material by the fluidized solidified material supply means 2 vary depending on the properties of the fluidized solidified material, but are set to, for example, supply pressure: 0.5 MPa, flow rate: about 50 liters / minute. To do.
Incidentally, the reinforcing material for surface layer treatment 1 shown in FIG. 1 is developed in about 3 minutes after the fluidized solidifying material supplying means 2 starts supplying the fluidized solidified material to the proximal bag 12a. Then, the development proceeds at a speed of 2.5 to 3 m / min, and the fluidized solidifying material is introduced into the branch side bag body 13b ′ from the front end portion of the branch side bag body 12b, and the reinforcing material for surface processing 1 could be fully deployed.

According to the surface treatment method for soft ground and the surface treatment material and bag used therefor, fluidity solidification is performed from the base side bags 12a and 12b of the surface treatment bags 12 and 13 constituting the surface treatment reinforcing material 1. Without significantly increasing the injection pressure of the flowable solidifying material when the flowable solidifying material is filled into the branch side bag bodies 12b and 13b arranged in two or more rows, the bag bodies 12 and 13 are also provided. Can be filled at a time without causing breakage of the fluid and local fluid dehydration from the fluidized solidified material through the bags 12 and 13, thereby improving the work efficiency of surface treatment work on soft ground. it can.
In addition, since the entire surface processing reinforcing material 1 is flexible and does not have a part that is bulky, the surface processing reinforcing material 1 can be wound in a roll shape or folded to be conveyed in a compact state.

  As mentioned above, although the surface layer processing method of the soft ground of the present invention and the surface layer processing material and bag used for it were explained based on the example, the present invention is not limited to the composition described in the above example, The configuration can be changed as appropriate without departing from the spirit of the invention.

  The surface treatment method for soft ground according to the present invention, and the surface treatment material and the bag used for the method, without increasing the injection pressure when filling the plurality of bags constituting the reinforcing material for surface treatment with the fluidized solidifying material. In addition to being able to be filled at once, it is possible to roll the surface treatment reinforcing material into a roll or fold it and transport it in a compact state, improving the work efficiency of surface treatment work on soft ground Therefore, it can be suitably used for a surface layer processing method for soft ground including water on the sea or the like.

The surface treatment method of the soft ground of this invention, and the surface treatment material used for it, and one Example of a bag body are shown, (a) is a top view, (b) is sectional drawing which shows an example of the laying method of the reinforcement material for surface treatment It is. The 1st modification of the coupling | bonding method of a planar reinforcing material and the surface layer processing bag body is shown, (a) is a plan view, and (b) is an XX cross-sectional view of (a). The 2nd modification of the coupling | bonding method of a planar reinforcement and a surface layer processing bag body is shown, (a) is a top view, (b) is XX sectional drawing of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface layer processing reinforcing material 11 Planar reinforcing material 12 Surface layer processing bag body 12a Base end side bag body 12b Branch side bag body 13 Surface layer processing bag body 13a Base end side bag body 13b Branch side bag body 13b 'Branch side bag Body 14 Fluidity solidification material inlet 2 Fluidity solidification material supply means 21 Mixer 22 Hopper 23 Pump 24 Flow meter 25 Valve 26 Data processing and control device 27 Load cell 28 Load cell G Soft ground

Claims (8)

  A base end side bag body into which the fluidized solidifying material is introduced, and a base end side that is arranged in two or more rows in a direction perpendicular to the base end side bag body and communicates with the base end side bag body A reinforcing material for surface layer treatment including a surface layer processing bag body formed in a comb shape with a branch side bag body into which a fluidized solidifying material is introduced from the bag body is laid flat on a soft ground. A method for treating a surface layer of a soft ground, wherein a rigid reinforcing body is formed by filling a flowable solidifying material in the surface treatment bag body.   Two base end side bag bodies in which a surface layer processing bag body is disposed in a length direction and a width direction of the surface layer processing bag body, and one ends thereof communicate with each other, and the two base end portions 2. The surface treatment method for a soft ground according to claim 1, wherein the surface layer treatment method comprises a plurality of branch side bags respectively communicating with the side bags in a lattice shape.   The surface treatment method for soft ground according to claim 1 or 2, wherein the branch-side bag is partially bonded over the entire surface of the planar reinforcement constituting the reinforcement for surface treatment.   A base end side bag body into which the fluidized solidifying material is introduced, and a base end side that is arranged in two or more rows in a direction perpendicular to the base end side bag body and communicates with the base end side bag body Surface layer processing bag body configured in a comb shape with a branch side bag body in which a flowable solidifying material is introduced from the bag body, and planar reinforcement arranged on the upper surface or the lower surface of the surface layer processing bag body A soft ground surface treatment material, comprising: a material and a fluidized solid material filled and solidified in the surface treatment bag body.   Two base end side bags that are arranged in the length direction and width direction of the planar reinforcing material and that communicate with each other, and a plurality of base end side bags that communicate with the two base end side bags, respectively. 5. The surface treatment material for soft ground according to claim 4, comprising a bag body for surface treatment that is configured in a lattice pattern with the branch side bag body.   The surface treatment material for soft ground according to claim 4 or 5, wherein the branch side bag is partially bonded over the entire surface of the planar reinforcing material.   A base end side bag body into which the fluidized solidifying material is introduced, and a base end side that is arranged in two or more rows in a direction perpendicular to the base end side bag body and communicates with the base end side bag body A surface layer processing bag body for soft ground, characterized in that it is formed in a comb shape with a branch side bag body in which a fluidized solidifying material is introduced from the bag body.   The surface layer processing bag body for soft ground according to claim 7, wherein a large diameter portion is formed in the base end side bag body, and the large diameter portion is joined to the branch side bag body.

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