JPH076301B2 - Columnar body burying method and expansion / solidification package used for it - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an improved construction method for burying pillars in the ground, and an expansion suitable for use in burying pillars in the ground. -It is related to the solidification package.

(Prior Art) Conventionally, when burying a columnar body in soft ground, a concrete foundation is installed below the surface-exposed portion of the buried columnar body, or an auxiliary structure called "root entrapment". A method of setting up, a branch line on the surface of the columnar body, or a method of supporting another pillar fixed in the ground as a sticker, or a method of supporting the pillar by connecting it to the other pillar, Furthermore, a structure such as expanding the diameter of the columnar body is provided under the columnar body, or the gap between the outer periphery of the columnar body and the drill hole is backfilled to strengthen the ground around the ground where the columnar body is embedded. Efforts have been made to make columnar bodies self-supporting and retaining even in soft ground by using a method such as compaction by compaction.

(Problems to be Solved by the Invention) However, the various methods as described above require a site for installing an auxiliary structure for supporting the columnar body in addition to the site for burying the columnar body to be embedded. In addition, there are problems such as the need for drilling in a far larger area than the usual drilling holes, the complexity of the process, the inefficiency of construction, and excessive construction equipment.

The present invention is to provide a columnar body burying method for solving the above various problems, and an expansion / solidification package particularly suitable for use in the method.

(Means and Actions for Solving the Problem) In order to solve the problem, the present invention contains a powdery or granular reaction agent that expands and solidifies by a reaction with water, and the reaction agent. Using an expanded / solidified package including a water-permeable or water-soluble bag-like outer skin, after encapsulating the underground embedding site of a predetermined columnar body with the package, embedding the columnar body, and reacting in the package It is characterized in that the agent is reacted with water to form a solidified material layer around the columnar body.

In this way, by encapsulating the underground buried portion of a predetermined columnar body with a package of the reaction agent and inserting it into a pre-drilled hole, the reaction agent is surrounded by a predetermined amount around the columnar body in the drilled hole. The bag is reliably positioned in a thickness, and such a reaction agent is shielded from the sand and the like by the bag-like outer cover, and the water permeability or water solubility of the bag-like outer cover allows the soil to penetrate through the bag-like outer cover. When it is buried in the water inside or the ground without water, it reacts with the water added artificially and expands and solidifies.

Then, due to the expansion of the reactant at that time, the hole wall of the drill hole is pressed and compressed by the force acting radially outward from the center of the hole, and due to the compression action,
As the soft ground becomes stronger, the underground water around the hole is forcibly discharged, and the reaction agent intensifies due to the absorption of the discharged underground water by the reactive agent, causing the reactive agent to expand and solidify. Is further promoted, and "reaction → expansion, solidification →
The reaction cycle of pressing, compressing → forced drainage → water absorption is repeated, and finally, the reaction agent that is expanded and solidified and integrated with the columnar body is added to the ground that has been strengthened by compression and dehydration. The columnar body embedded in the ground is formed so as to surround the outer periphery of the columnar body, thereby strongly supporting the embedded columnar body.

In the present invention, when the columnar body encased by the expansion / solidification package is inserted into the hole for burying the columnar body provided in the ground, the package should be in direct contact with the side wall of the hole. (A) In the cylinder of the columnar hard member previously inserted into the hole for burying the columnar body, the expansion /
In the state where the columnar body packaged by the solidification package is inserted, or (b) the columnar body packaged by the expansion / solidification package is positioned in the cylinder of the cylindrical hard member,
A method of inserting into a hole for burying a columnar body is also adopted, and even in that case, by removing the tubular hard member from the hole for burying the columnar body, after the same reaction circulation as described above is repeated. Finally, on the ground that has been strengthened by compression and dehydration, the reactant that has expanded and solidified into one body with the columnar body is formed around the outer periphery of the columnar body embedded in the ground and is strong. It will support the columnar body buried in.

Further, as used herein, an expanding / solidifying package including a powdery or granular reaction agent which expands and solidifies by a reaction with water and a water-permeable or water-soluble bag-like outer shell which contains the reaction agent. Is a strong expansion and solidified material layer consisting of a pure frame reactive agent that does not mix with earth and sand due to the reaction of the agent contained in the water-permeable or water-soluble bag-like outer skin that blocks the earth and sand etc. Is realized.

(Example) Hereinafter, the present invention will be described in more detail with reference to Examples of the present invention. However, it should be understood that the present invention is not limited to the examples shown below, but can be broadly construed to the maximum extent based on the technical knowledge obvious to those skilled in the art. .

First, the reactive agent in the expansion / solidification package used in the present invention may be any substance as long as it is a powdery or granular substance (material) that expands and solidifies by reacting with moisture, and has been conventionally expanded. Various things are known as hardened solid particles and the like, for example, those containing quicklime and aluminum as the main components, or those in which cement is added, quicklime, gypsum, iron oxide, clay powder, etc. And those made of sand are used. The type of the reactant can be appropriately selected according to the application form of the expansion / solidification package. Further, the amount of the reactant in the expanded / solidified package can be appropriately adjusted according to the size of the solidified material layer formed around the columnar body and the like.

And, as the bag-shaped outer skin which accommodates such a reaction agent in the bag-shaped inside and gives an expanded / solidified package, a water-permeable thin film such as cellophane or a water-soluble thin film such as a PVA film is used. Any material can be used as long as it is water-soluble or water-soluble and blocks soil and the like. Further, even if the material itself is impermeable, such as PE film and PP film, it can be similarly used if it is made permeable by forming holes.

Further, such a bag-like outer skin has a thickness depending on the soil property in which the package is used according to the present invention, or in consideration of the time until water permeates or dissolves in water, the reaction speed of the reactant contained therein, and the like, It is used with various changes in the material, shape, hardness, etc. of the material.

For example, when it is desired to slow down the speed at which the reaction agent reacts with water as the bottom of the buried columnar body approaches the surface exposed part, a thin bag-like skin or moisture is placed on the expansion / solidification package enclosing the bottom of the columnar body. Using a bag-like outer skin that is easy to permeate through
For the solidified package, a thick bag-like outer cover or a bag-like outer cover using a material that takes time to permeate moisture may be used.

Furthermore, the shape of the expansion / solidification package used in the present invention can be any shape in accordance with the shape of the columnar body to be embedded. For example, a tubular shape such as a strip shape, a plate shape, or a cylindrical shape, or a shape in which a bottom portion is provided on the cylindrical shape, or a shape such as a rod shape is used, and its size, thickness, etc. Accordingly, various changes can be made.

Incidentally, such an expanded / solidified package is particularly suitable for being used in the columnar body burying method according to the present invention, but is not necessarily limited to such an application, and is generally used for improvement of soft ground, etc. It is widely used as a material for civil engineering and construction.

An embodiment of the method for burying a columnar body according to the present invention using the expansion / solidification package according to the present invention will be described below with reference to the drawings.

FIG. 1 shows an outline of a process procedure of a utility pole burying method which is an example of the columnar body burying method according to the present invention.

First, as shown in FIG. 1 (a), in a utility pole 1 which is a columnar body to be embedded, the underground embedding site is formed by a water-permeable or water-soluble film. A rectangular bag is filled with a predetermined granular reaction agent, and the bag is surrounded by the expansion / solidification package 2 according to the present invention, which is a rectangular packing having a predetermined thickness, as shown in FIG. 1 (b). . In this case, the shape of the expansion / solidification package, the material of the outer cover, and the like can be appropriately selected as described above. For example, as shown in FIG. 3, a plurality of sausage-like expansions / solidifications can be used. Using package 2 ',
It is also possible to enclose the telephone pole 1.

Thereafter, the utility pole 1 encased in a package 2 is suspended by a crane as shown in FIG. 1 (c) and embedded in a columnar body provided on a soft ground containing a large amount of water. It is inserted into the hole 4 for use and embedded (FIG. 1 (d)).

The utility pole 1 buried in this way is packaged in the package 2 at the part buried in the ground,
As described above, the package 2 contains the reaction agent that expands and solidifies by the reaction with water in the water-soluble or water-permeable bag-like outer skin, and thus FIG. As shown in Fig. 3, the reaction agent contained in the package 2 is penetrated into the package by penetrating the bag-like outer skin of the package 2 or by dissolving the bag-like outer cover while being shielded from the earth and sand by the bag-like outer skin. For example, it starts to expand and solidify by reacting with the water exuded from the soft ground with a lot of water around the hole for embedding.

As shown in FIG. 2 (b), when the reaction agent expands and solidifies by the reaction, the expanded and solidified reaction agent causes the side wall of the embedding hole to move radially outward from the center of the hole. It becomes compressed by the force acting on.

Then, due to the compression action of the expanded and solidified reaction agent,
The ground around the burial hole is compacted to strengthen the weak ground, and the water in the ground around the hole is forcibly discharged by the compressing action (Fig. 2 (C)). reference).

Furthermore, the forcedly discharged water in the ground is absorbed by the reaction agent in the package 2, and the reaction is intensified, whereby the expansion and solidification of the reaction agent are further promoted, and “reaction → expansion, The reaction cycle of “solidification → pressing, compression → forced drainage → water absorption” (see FIGS. 2 (a) to (c)) is repeated, and finally, the soil becomes firm due to compression and dehydration, and the soil expands. ， The layer of the reactive agent (lump) that solidifies and is integrated with the columnar body is formed so as to surround the outer periphery of the columnar body embedded in the ground, thus strongly supporting the embedded columnar body. It will be. In other words, the expanded and solidified reaction agent appears to be integrated with the columnar body embedded in the ground, and the columnar body has the same result as the diameter is expanded in the portion enclosed by the package 2. Be done.

Therefore, the load transmitted through the columnar body is supported by the ground in contact with the outer peripheral surface of the layer of the expanded and solidified reaction agent, and the vertical and horizontal ground resistances proportional to the contact area are limited to the columnar body only. It is much larger than when it is buried, and as a result, the vertical support force and horizontal resistance force increase.

By the way, in the case of adopting the burying method as described above, when the rubble or the like is projected from the side wall of the excavated hole for burying the columnar body, the expansion and solidification package enclosing the columnar body is used for burying the columnar body. When it is inserted into the hole, the bag-shaped outer skin of the package contacts the side wall of the hole, or contacts rubble protruding from the side wall of the hole to damage it, and before the reaction agent in the package reacts with moisture, the hole There is a case in which the reaction agent reacts with moisture to become dull by mixing with the earth and sand on the side wall of the column, or it becomes impossible to uniformly form the filler of the reaction agent around the columnar body.

In such a case, after excavating the hole, for example, a cylindrical hard member made of plastic is inserted into the hole, and while covering the side wall of the hole, inside the plastic cylinder, the expansion / solidification package used in the present invention described above is formed. After inserting the externally wrapped columnar body,
A method of pulling out such a plastic cylindrical hard member is advantageously adopted.

By using such a construction method, there is a problem that the reaction agent in the expansion / solidification package mixes with the earth and sand on the side wall of the hole before reacting with the water, and the reaction between the reaction agent and the water becomes dull. It can be avoided.

The cylindrical hard member covers the side wall of the hole for embedding, and is intended to prevent a thing that may damage the package outer shell from entering the cylinder, so a material other than plastic, For example, any kind of material can be used as long as it is a material suitable for the purpose, such as a metal material or a ceramic material.

The tubular hard member may be a tubular member from the beginning, but a flexible plate-like member may be tubularly used when inserting it into the hole for embedding. However, it is also possible to insert several plates or the like into the hole for embedding and cover the side wall of the hole to form a tubular shape.

Furthermore, the columnar body is wrapped in an expansion / solidification package, and is covered with the above-mentioned cylindrical hard member before being inserted into the hole for embedding, and thereafter, all of them are integrated and embedded. It is also possible to adopt a construction method in which the tubular hard member is removed only after it is inserted into the hole and the insertion is completed.

This method also avoids the problem that the reaction material in the expansion / solidification package mixes with the earth and sand on the side wall of the hole before it reacts with water, and the reaction between the reaction agent and water becomes dull. Then, the method is the same as the method of covering the side wall of the burial hole described above with the cylindrical hard member. However, this construction method has the advantage that it is often easier to construct than the construction method described above.

As described above, according to the present invention, the case where the expansion / solidification package is inserted into the hole for embedding in the mode surrounding the columnar body has been described. However, the expansion / solidification package has a structure between the columnar body and the hole for embedding. It can be used in any place.
For example, the expansion / solidification package may be used only for the bottom of the columnar body reaching the deepest part of the hole in the ground, or the expansion / solidification package may be used only for the deformed column, for example, the recess of H steel. There is also a possibility.

Further, the present invention is not limited to the case where the outer periphery of the columnar body buried in the ground is uniformly covered with the expansion / solidification package, and the thickness of the expansion / solidification package enclosing the columnar body is the same. However, depending on the depth buried in the ground, and even on the same outer circumference of the same columnar body,
Modifications are made as appropriate according to the application.

Incidentally, the columnar body burying method according to the present invention is preferably used particularly when burying the columnar body in the soft ground, the use of the present invention is not limited to such cases, normal ground and In the case of embedding a columnar body in a sandy ground or the like, it has all other uses that can be envisioned based on the ordinary knowledge of those skilled in the art.

Further, the present invention is a utility pole, overhead wire pole, street light, advertising tower, a pillar of amusement facility, etc. in which a part of the columnar body is embedded in another, as well as all or most of the columnar body such as foundation piles, temporary piles, etc. It can be used in various fields, such as those that are buried in the ground, anchors, and the like that are buried in the ground to resist pull-out force.

By the way, in the present invention, when the water content is insufficient to completely react the reaction agent in the expansion / solidification package, for example, when only the water exuding from the ground around the columnar body is insufficient, Alternatively, in the case where water does not exude from the ground in which the pillars are buried, all water such as ground water, rain water, artificial water addition, etc. can be used for the reaction of the reaction agent.

(Effects of the Invention) As described above, the present invention uses the expansion / solidification package in which the reactive agent that expands / solidifies by reacting with water is contained in the water-permeable or water-soluble bag-shaped outer skin. After encapsulating a predetermined embedding site, the columnar body is embedded, and the reaction agent and moisture in the package are reacted to form a solidified material layer around the columnar body. Therefore, a layer of the expanded and solidified reactant, which is integrated with the pillar, is formed around the buried pillar, and at the same time, "reaction of the reactant → expansion / solidification of the reactant → reactant By repeating `` Compression of the surrounding ground by → → forced drainage from the surrounding ground '', the surrounding ground where the pillars are buried is dehydrated and compacted and the soft ground becomes strong, so it is a simple process. And efficient construction, and also excessive construction equipment Even though the auxiliary support mechanism other than the pillars to be buried and the site for the support mechanism are not required, the pillars that are firmly buried can be supported and supported even on the soft ground.

Further, according to the present invention, the presence or absence of the expansion / solidification package enclosing the columnar body, the type, the amount of the reactant in the package, and the like are arbitrarily and easily selected and adjusted, so that the periphery of the embedded columnar body is reduced. The presence or absence of a layer of the expanded and solidified reaction agent that is formed and the thickness of the layer can be adjusted as desired, so by uniformly compressing and dehydrating the surrounding ground, the strength of the ground around the buried columnar body is improved. If it is possible to strengthen it homogeneously, it is also possible to strengthen the surrounding ground of any different degree.

Further, in the columnar body burying method according to the present invention, when the columnar body packaged by the expansion / solidification package is inserted into the columnar body burying hole provided in the ground, the package is provided on the side wall of the hole. By adopting a method of using a tubular hard member so that it does not come into direct contact, the outer wall of the package is covered from the rubble, etc. that covers the sidewall of the hole for embedding and projects from the sidewall of the hole with the tubular rigid member. If the protective agent is used, the debris, etc. will not damage the outer skin of the package, and the reactive agent in the package will not mix with the earth and sand of the surrounding ground before reacting with the moisture. By reacting with, it is possible to form a solidified material layer of a reactant having a high hardness, and it is possible to more strongly realize the self-support and support of the embedded columnar body.

Furthermore, the expansion / solidification package of the present invention is
Because it is a powdery or granular reactive agent that expands and solidifies by reacting with water, is covered with a water-permeable or water-soluble bag-like outer cover, and is contained in the bag-like form, it is suitable for handling, transportation, management, etc. It is extremely convenient and can be mass-produced.

In addition, the expansion / solidification package in the present invention does not allow the permeation of earth and sand, etc., but contains the reaction agent in the outer skin that is water-permeable or water-soluble, and does not mix with earth and sand, etc. It has the effect of increasing the hardness after the reaction of the reaction agent because it expands and solidifies by reacting with, and the material, thickness, etc. of the package outer shell are appropriately changed according to the application, and the reaction It is also possible to adjust the time until the reaction starts after the agent is put into the ground. This is particularly effective when the water content of the ground is different at the boundary of the water table.

In addition, in the present invention, since the powdery or granular reactant is contained in the bag-shaped outer cover, there is an effect that the construction is easy and no dust is generated during the construction.

[Brief description of drawings]

FIGS. 1 (a) to 1 (d) are views showing one step of a columnar body burying method according to one embodiment of the present invention. FIGS. 2 (a) to 2 (c) are explanatory views showing respective stages of reaction in the expansion / solidification package in the columnar body burying method of FIG. FIGS. 3 (a) and 3 (b) correspond to FIGS. 1 (a) and 1 (b), respectively, showing an example of using a different shape from the expansion / solidification package shown in FIG. It is a figure. 1: Utility pole 2, 2 ': Expansion / solidification package 4: Hole for burying columnar body

Claims (4)

[Claims] 1. A swelling / solidifying package comprising a powdery or granular reaction agent which expands and solidifies by a reaction with water, and a water-permeable or water-soluble bag-like outer shell containing the reaction agent. After encapsulating an underground buried portion of a predetermined columnar body with the package, the columnar body is embedded, and the reactant in the package is reacted with moisture to form a solidified layer around the columnar body. A method of burying a columnar body characterized by: 2. A columnar body, which is provided in the ground, covers the side wall of a hole for burying the columnar body with a cylindrical hard member, and then inserts the columnar body encased by the expansion / solidification package into the cylinder of the cylindrical hard member. After that, the cylindrical hard member is extracted from the hole for burying the columnar body, and the columnar body burying method according to claim (1). 3. A columnar body, which is packaged by the expansion / solidification package, is inserted into a hole for burying the columnar body provided in the ground in a state where the columnar body is positioned inside a cylinder of a cylindrical hard member, The columnar body burying method according to claim 1, wherein the cylindrical hard member is pulled out from the hole for burying the columnar body. 4. An expansion / expansion device for embedding a columnar body, comprising a powdery or granular reaction agent which expands and solidifies by a reaction with water, and a water-permeable or water-soluble bag-like outer shell which contains the reaction agent. Solidification package.