JPH08209670A - Reinforcing construction method for gas station foundation ground - Google Patents

Abstract

PURPOSE: To provide a foundation reinforcing construction method effective for repeat vibration in a simple structure under a condition peculiar to a gas station, reduced in term of works and the cost, and capable of preventing environmental pollution. CONSTITUTION: A piece of non-woven cloth 3 is laid on the bottom of the slot 2, and further a geogrid 4 is laid. Subsequently, a filler 5 such as gravel or the like is filled and subjected to rolling compaction, the geogrid 4 and the non-woven cloth 3 are folded back to wrap the filler 5, whereby a mattress-like foundation support part is formed, and a building foundation 9 or a drive-way is supported by the foundation support part. Thus, the geogrid 4 and gravel are bound together, so that the stress generated in the foundation support part by repeated vibration is shared by the tensile force of the geogrid 4 to stabilize the foundation support part. Accordingly, the foundation ground can be reinforced effectively for the vibration produced by going in-and out of a vehicle peculiar to a gas station, and the reduction of term of works, the reduction of cost and the prevention of environmental pollution can be realized in a simple structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reinforcing a foundation and, more particularly, to a method for reinforcing a foundation of a gas station base suitable for constructing a gas station where vehicles frequently enter and exit.

[0002]

2. Description of the Related Art The basic construction method for low-rise buildings such as ordinary houses is to lay a split stone in a groove excavated from the ground, throw away concrete, flatten the surface, and install a foundation on the building. This is a conventional method.

[0003] In the construction of gas stations, conventionally, the pile method, cement treatment method,
Rubbable concrete method, replacement method, etc. have been adopted. Gas stations require a higher level of safety than ordinary homes in handling hazardous materials, but on the other hand, they need to be restructured to introduce or enhance new service equipment, so convenience is also required when rebuilding. In addition, it is necessary to prevent construction pollution because it is located in an urban area.

The pile construction method in which piles are laid and the foundation is supported thereby requires high construction costs and also enormous cost is required to remove the piles when rebuilding. Further, the cement treatment method and the rubble concrete method have difficulties in removal, renewal and reuse, and the replacement method needs to solve pollution problems such as residual soil treatment.

[0005]

In the case of a building such as a gas station in which cars come in and go out frequently and heavy vehicles also come in and go out repeatedly, vibrations due to the passage of vehicles are repeatedly received. Although it is economically extremely expensive to use the above-mentioned pile foundation for such a low-rise building subjected to repeated loads, it has been unavoidable.

[0006] In the construction of a gas station, as described above, the lower surface of the foundation is generally supported by split stones, and the consideration for such a repeated load is lacking. Therefore, there is a problem that the continuous vibration causes the building to turn over time.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems. In the construction of a gas station, a simple structure is effective against repeated vibrations, and the construction period is shortened and the cost is reduced. And to provide an effective foundation reinforcement method for pollution prevention.

[0008]

Means for Solving the Problems In order to achieve the above object, a method for reinforcing a gas station base ground according to the present invention comprises:
It is characterized in that a structure formed by wrapping a filling material with a geogrid and a non-woven fabric is used as a building foundation of a gas station or a supporting ground of a driveway.

[0009] In the method of reinforcing the foundation of a gas station base, a nonwoven fabric larger than the excavation area of the groove is laid in a groove excavated from the ground of the foundation of the gas station building, and a larger area is formed from above the nonwoven fabric. Laying a geogrid, further filling the slot with gravel from above and rolling it, covering the filled gravel so as to wrap it with the geogrid, and supporting the foundation of the building thereon. And

In addition, in the method for reinforcing the foundation ground of a gas station, the ground of the driveway of the gas station is excavated, a non-woven fabric is laid in the excavation hole, and a geogrid is further laid on the non-woven fabric. It is characterized in that a packing material such as gravel is spread from above and rolled, and the packed packing material is covered so as to be wrapped with the geogrid, and the driveway is supported thereon.

Also, a filler member is wrapped with a geogrid and a nonwoven fabric, a so-called mattress or cushion-like reinforcing member is manufactured in advance, and the reinforcing member is laid on the excavated ground to form a base for a gas station building or a driveway. It is characterized by being a supporting ground.

[0012] The present invention is characterized in that a structure formed by wrapping the filler with the geogrid and the nonwoven fabric is disposed on soft ground of a gas station.

[0013]

According to the above construction, the so-called interlocking effect (also referred to as an anchoring effect) in which the mesh of the geogrid meshes with the filler such as gravel, restrains the geogrid and the filler and integrates them. . In this case, the stress generated by repeatedly applying vibration to the foundation or the support ground of the driveway is shared by the tensile force of the geogrid, so that the foundation support can be stabilized against repeated loads.

In addition, since the geogrid has corrosion resistance and the nonwoven fabric has a certain strength, the lower surface of the base support can be held on a stable flat surface and has a water permeability.
Rainwater does not stay on the foundation support.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 to FIG. 5 are diagrams showing the procedure of the construction method according to one embodiment of the present invention. First, as shown in FIG. 1, a slot 2 is excavated in a foundation work portion of the ground 1 by a known technique.

Next, as shown in FIG. 2, a nonwoven fabric 3 is laid on the bottom of the slot 2, and a geogrid 4 is further placed thereon.
Lay. The nonwoven fabric 3 is slightly larger than the slot area, and is set up to the filling thickness of the internal filler or more. In addition, the geogrid 4 has a larger area, and is expected to be folded back so as to wrap the internal filler.

Then, as shown in FIG. 3, the groove 2 is filled with a filling material 5 such as gravel, and compacted. Thereafter, the geogrid 4 and the nonwoven fabric 3 are folded back so as to wrap the compacted filler 5. FIG. 4 shows a mattress-shaped base support 6 in which the geogrid 4 and the nonwoven fabric 3 are folded and the rolled filler 5 is wrapped.

FIG. 5 is a diagram showing a construction example in which foundation work is performed on the mattress-shaped foundation support 6. In the construction example shown in the figure, a foundation split stone 7 is laid on the foundation support portion 6, and furthermore, the concrete 8 is discarded and beaten to flatten the upper surface, and the building foundation 9 is built thereon.

The geogrid used in the method of the present invention has strong nodes, is formed of a resin such as polypropylene, polyethylene, polyester, aramid, nylon, and vinylon, and has a tensile strength of 1 in the longitudinal and transverse directions. ~ 5t
/ M, the horizontal and vertical meshes that are the effective openings of the mesh
It is effective to have a thickness of about 10 cm. The nonwoven fabric has a thickness of 2 to 10 mm, a tensile strength of 1 to 3 t / m, and a water permeability of 10
~ ¹ cm / sec.

FIG. 9 shows the relationship between the load and the thickness for each N value of the mattress-like structure in the method of the present invention. As shown in FIG. 9, when the load per unit length is 7 t, the mattress-like structure has a width D =
A load of 1.5 m and a thickness h = 0.5 m can be supported.

FIG. 6 is a sectional view of a gas station. By this method, the base support 6 that independently supports the so-called canopy 10 is reinforced, so that the vibration caused by the ingress and egress of vehicles specific to gas stations can be absorbed by the base support 6, and irregularities such as uneven settlement due to vibration can be prevented. can do.

Next, another embodiment of the present invention will be described.
The first embodiment described above was a method of reinforcing the building base 9 of a gas station, but the second embodiment is, as shown in FIG. 6, a driveway 11 such as a so-called canopy 10 portion where a car goes in and out. This is the ground reinforcement method. The ground of the driveway support portion 12 is excavated, a nonwoven fabric and a geogrid are laid, the filler is spread and compacted, and the upper surface of the spread filler is wrapped with the geogrid and fastened as in the first embodiment. Then, the driveway support portion 12 in the form of a mattress is formed. Concrete 13 is placed on the driveway support portion 12 to construct a gasoline sales yard where automobiles enter and leave.

According to the present embodiment, similarly to the first embodiment, the vibration caused by the entry / exit of the vehicle peculiar to the gas station can be absorbed by the driveway support portion 12, and uneven settlement due to the repeated load can be prevented.

FIG. 7 is a perspective view showing still another embodiment of the present invention. In the present embodiment, a reinforcing member 15 in a so-called mattress shape or a cushion having a smaller area than that is formed by wrapping the filler 5 with a geogrid 4 and a nonwoven fabric 3 in another place such as a factory in advance. As shown in FIG. 8, the reinforcing member 15 is laid on the excavated ground to reinforce the ground of the building foundation 9 or the driveway 11, so that the vibration caused by the ingress and egress of the vehicle is constantly maintained, as in the above-described embodiment. Therefore, it is possible to solve a problem peculiar to a gas station, that is, adverse effects such as uneven settlement due to repeated loads are caused.

As described above, according to the method of the present invention, the geogrid and the non-woven fabric having a strong mesh structure wrap the filler such as crushed stone or gravel and completely restrain it, so that it is sufficient even if it is relatively thin. It is possible to form a board-like body that exerts a supporting force. Therefore, the objective can be achieved with a shallower foundation than the rubble concrete method or the replacement method. The advantages are a shortening of excavation work and an increase in safety, a reduction in the amount of soil left over, and their effects. Further, since the treated thickness is almost the same as the treated thickness of the road where the gas station is in contact, the conventional construction method remarkably reduces the work of correcting the height difference with the road surface.

Further, the method of the present invention can be applied only by a normal earthworking machine. Compared with the pile method, vibration and noise are extremely small, there is no problem of environmental pollution compared with the cement treatment method, and the amount of waste such as construction residual soil is extremely small compared with the replacement method or the rubble concrete method.

Moreover, when the gas station constructed by the method of the present invention is rebuilt, the foundation part can be removed with a normal backhoe, and the filler can be reused.
This method is clearly superior to the conventional method, which requires much time and money to remove the foundation.

In addition to the geogrid and the non-woven fabric, the materials used in the method of the present invention are fillers such as crushed stone that can be obtained anywhere. Work can be done easily and efficiently without the need for special machines or technicians. In the conventional method,
It required a long construction period and significant costs, such as arranging materials, loading and setting up construction machines, and securing a curing period.

Furthermore, in the conventional construction method, as a temporary construction work, improvement of scaffolding and measures for electric wires are required, and a sheet pile for protecting a deep excavation groove is sometimes constructed. is there.

Table 1 below compares the cost of the method of the present invention with that of another conventional method. As is clear from Table 1, the method of the present invention is extremely superior in cost as compared with the conventional pile method, cement processing method, replacement method and the like.

[0031]

[Table 1]

[0032]

As described above, according to the present invention, in the construction of a gas station having specific conditions, an effective foundation ground can be formed with a simple structure, and compared with the conventional method.
Shorter construction period, lower cost, and prevention of pollution can be realized.

[Brief description of drawings]

FIG. 1 is an explanatory view showing ground excavation in a construction method according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing the laying of a nonwoven fabric and a geogrid in the method of this embodiment.

FIG. 3 is an explanatory view showing the rolling pressure of a filler in the method of this embodiment.

FIG. 4 is an explanatory view showing a mattress-like foundation support portion in the method of the present embodiment.

FIG. 5 is an explanatory view showing a foundation work on a foundation support part in the method of this embodiment.

FIG. 6 is a sectional configuration view of a gas station according to the method of the present invention.

FIG. 7 is a perspective view showing another embodiment of the present invention.

FIG. 8 is a sectional configuration diagram of a gas station according to another embodiment of the present invention.

FIG. 9 is a graph showing the relationship between load and thickness for each N value of the mattress-like structure in the method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground 2 Slot 3 Nonwoven fabric 4 Geogrid 5 Filler 6 Foundation support 7 Foundation split stone 8 Discarded concrete 9 Building foundation 10 Canopy 11 Driveway 12 Driveway support 13 Concrete 15 Mattress-shaped reinforcing member

Front page continuation (72) Inventor Tatsumi Kose 1-3-1, 1-1 Aoba-ku, Sendai-shi, Miyagi Nippon Oil Co., Ltd. Sendai Branch (72) Inventor Kunihiko Kunihiko Kita-Shijo Nishigo, Chuo-ku, Sapporo, Hokkaido 1st Asti 45 Building Nippon Oil Co., Ltd. Sapporo Branch

Claims (5)

[Claims] 1. A method of reinforcing a gas station base ground, wherein a structure formed by wrapping a filler with a geogrid and a nonwoven fabric is used as a base for a gas station building or a support ground for a driveway. 2. A method for reinforcing a gas station base ground, wherein a non-woven fabric larger than the excavation area of the groove is laid in a groove excavated from the ground of the base of the gas station building, and a larger area is formed from above the non-woven fabric. Laying a geogrid, further filling the slot with gravel from above and rolling it, covering the filled gravel so as to wrap it with the geogrid, and supporting the foundation of the building thereon. Reinforcement method for gas station foundation ground. In the method of reinforcing the foundation of a gas station, the ground of the driveway of the gas station is excavated, a nonwoven fabric is laid in the excavation hole, and a geogrid is further laid on the nonwoven fabric. Filling a filler such as gravel from above and rolling it, covering the rolled filler so as to wrap it with the geogrid, and supporting the driveway thereon, reinforcing the foundation of a gas station base. Construction method. 4. A so-called mattress-like or cushion-like reinforcing member is prepared in advance by wrapping a filler with a geogrid and a nonwoven fabric, and the reinforcing member is laid on the excavated ground to form a base for a gas station building or a driveway. A method of reinforcing the foundation ground of a gas station, characterized by using a supporting ground. 5. The gas station according to claim 1, wherein a structure formed by wrapping the filler with the geogrid and the nonwoven fabric is disposed on soft ground. Reinforcement method for foundation ground.