JP3406565B2 - Method of pouring slurry into porous material layer for slope stabilization - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for injecting a slurry into a porous material layer for slope stabilization. 2. Description of the Related Art If a slope is left as it is, there is a risk that topsoil or the like may be washed away by running water such as rainwater or collapse, so that a method for stabilizing the slope is required. [0003] Therefore, a stabilizer such as mortar or cement milk is sprayed or painted on the slope. [0004] In such a slope stabilization work, since the surface stabilizer layer has no water permeability, water seeping out on the ground surface of the base remains between the base (construction slope) and the stabilizer layer. So
This may cause the stabilizer layer to lift (separate from the base). For this reason, the stabilizer collapses. [0005] In particular, since there is no outflow of oozed water, the enclosed water repeatedly expands and contracts due to the temperature difference between day and night, so that cracks are generated in the stabilizer layer and cause collapse. There were problems such as the durability of the stabilizer layer was significantly reduced. Therefore, the above-mentioned various problems can be solved by a porous material provided by applying or spraying a mixed permeable material of an aggregate having a particle size necessary for obtaining water permeability on a construction surface and a self-hardening adhesive. It is. [0007] Then, in order to apply greening for the purpose of landscape and the like to the porous material, it is necessary to fill a gap of the porous material with a slurry as a plant cultivation base material having a function of growing plants. The above-mentioned filling method employs spraying and pouring. [0008] According to the above-mentioned filling means, slurry is sprayed or poured on the surface of the porous material, so that only the surface side of the porous material is filled (penetrated). At the end, the inside or the back side cannot be filled. In particular, air is present (filled) inside the porous material. [0009] Then, in the spraying or pouring, there is a problem that the existing air is not sufficiently discharged (escaped), the entry of the slurry is hindered by the enclosed air, and the slurry cannot be filled sufficiently. . SUMMARY OF THE INVENTION It is an object of the present invention to smoothly inject a slurry and to achieve the desired injection without any inconvenience caused by air existing inside. In order to solve the above-mentioned problems, the present invention provides a method of mixing an aggregate having a particle size necessary for obtaining water permeability on a slope such as a slope with a self-hardening adhesive. In a slope stabilization method in which a porous material layer is provided by painting or spraying a water-permeable material, a soil layer is provided on the entire surface of the porous material layer .
In addition, the tip of the injection pipe is inserted into a hole provided toward the inside of the porous material layer from an appropriate position on the surface of the soil layer, and then the injection
A method of injecting a slurry into a porous material layer of a slope stabilizing method, wherein a slurry of a plant cultivation base material is filled from a pipe is adopted. Embodiments of the present invention will be described with reference to the accompanying drawings. In the first embodiment of the present invention, as shown in FIG. 1 to FIG. 3, a slope of a highway constructed by an open cut method or the like, a flooded slope of a dam, various facilities and the like are faced. A mixed water permeable material 3 obtained by mixing and kneading an aggregate 1 and a self-hardening adhesive 2 having a particle size necessary for obtaining water permeability is applied or sprayed on a slope or a slope having a possibility of collapse. Thus, a porous material layer A having a predetermined thickness is provided. The above aggregate 1 has an appropriate particle size of 5 to 20 m.
m, sieve crushed stone, sieve gravel or artificial lightweight coarse aggregate is used. As the self-hardening adhesive 2, a cement paste composed of, for example, cement and water is used as a standard, but if more strength is required, it may be replaced with a polymer based on cationic or vinyl acetate. Adhesives or reinforcing materials such as vinylon staple fibers may be mixed (combined), and admixtures such as a compound of calcium nitrate ( (A modifying agent that changes the cement hydration reaction) may be mixed (in combination). In order to stably fix the porous material layer A to the slope B, a wire mesh is stopped on the slope B via an anchor pin, and the porous material is sprayed or painted on the wire mesh, as is known. What is necessary is just to make the layer A into an engagement relationship. Further, the porous layer material A is provided with an injection hole 4 inward from the surface. The above-mentioned injection hole 4 is provided by embedding a filling material and being pulled out during or after hardening of the water-permeable material 3, or provided by perforation or the like, and the position is appropriately determined and provided. Next, as shown in FIG. 2, after the tip of the injection pipe 5 is fitted into the injection hole 4, the slurry C of the plant cultivation base material is injected from the injection pipe 5 while being pressed. As shown in FIG. 3, the injected slurry C enters the voids of the porous material layer A, and at the same time, the air in the voids is pushed and released by the injection pressure due to the intrusion, so that the slurry C flows into the entire voids ( Penetration) and good injection (filling) can be performed. Examples of the slurry C include bentonite (for adjusting viscosity), zeolite (for maintaining fertilizing power, water retention and alkali buffering) as soil improving materials,
Perlite (to improve air permeability and water retention and prevent caking), peat moss (to improve water retention, air permeability and fertilizer retention), through soil (black ink as vegetation base material), fertilizer (as initial fertilizer effect) (A fast-acting fertilizer or a slow-acting fertilizer as a long-term fertilizer) in a desired mixing ratio. The above-mentioned mixing is carried out, for example, in a tank provided with a stirring blade, and the pressure is fed from the tank to the injection pipe 5 through a hose or a pipe by operating a pump. In the second embodiment of the present invention, a soil layer D having a predetermined thickness is provided on the entire surface of the porous material layer A of the first embodiment as shown in FIG. The above soil layer D is
Provided by spraying. The porous material layer A is the same as in the first embodiment, and will not be described. After the injection pipe 5 is inserted into the injection hole 4 provided from the soil layer D toward the porous material layer A, the slurry C of the plant cultivation base material is injected from the injection pipe 5. The above slurry C is the same as in the first embodiment, and the intrusion of the injected slurry C is the same as in the first embodiment, and the description is omitted. For example, as shown in FIG. 5, the above soil layer D has a function of preventing the seepage of the slurry C injected into the porous material layer A and a function as a growth base material (mixing of seeds, fertilizers, etc.). As shown in FIG. 6, the surface of a base material having only a function of preventing seepage of the slurry C injected into the porous material layer A (does not mix seeds and fertilizers) as shown in FIG. And those provided with a mixed vegetation base material. The method for injecting the slurry into the porous material layer in the slope stabilization work according to the present invention is performed as described above.
The slurry is also infiltrated into the surface soil layer of the porous material layer so that the slurry can be smoothly and easily injected from the injection pipe into all the voids of the porous material layer, and the slurry can be applied to the soil layer. Yo
Thus, upward ejection of the slurry can be suppressed. [0030]

[Brief description of the drawings] FIG. 1 is a longitudinal sectional side view of a first embodiment of the present invention. FIG. 2 is a longitudinally enlarged side view showing a main part of the above. FIG. 3 is a longitudinal enlarged side view in which a slurry is injected into a void. FIG. 4 is a longitudinally enlarged side view of the second embodiment. FIG. 5 is an enlarged longitudinal side view showing an example of a guest soil. FIG. 6 is a longitudinally enlarged side view showing another example of a guest soil. [Explanation of symbols] A porous material layer B slope C slurry D Guest soil layer 1 aggregate 2 Self-hardening adhesive 3 mixed permeable materials 4 Injection hole 5 Injection tube

Claims (1)

(57) [Claims 1] A porous material obtained by applying or spraying a mixed permeable material of an aggregate having a particle size necessary for obtaining water permeability and a self-hardening adhesive on a slope such as a slope. In the slope stabilization work provided with the layer, after providing the soil layer on the entire surface of the porous material layer ,
Insert the tip of the injection pipe into a hole provided from the appropriate location on the surface of the soil layer into the porous material layer, and then fill the slurry of the plant cultivation base material from the injection pipe . A method for injecting a slurry into a porous material layer in a slope stabilization method, characterized in that: