JPH10306457A - Foundation block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foundation block which is excellent in the workability and inexpensive in the construction. SOLUTION: This foundation block is provided with a fixing face 1 for mounting a required structure on the upper surface, a bottom slab 3 laterally extending at a lower level by a specified height than the fixing face 1, and side walls 2 vertically connecting the fixing face 1 and the bottom slab 3 to integrally form a concrete block. By using this foundation block, a foundation can be constructed in a dry work method and the foundation construction period and cost can be reduced and the workability can be improved in comparison with the conventional wet work method. In the completed state of the foundation block, the weight of earth filled back on the upper side of the bottom slab 3 acts as a restricting force against falling of the foundation block and hence, the stability of the foundation block can be favorably kept.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation block for supporting a structure installed on the ground such as a gate post.

[0002]

2. Description of the Related Art For example, when a structure such as a gate post is constructed and constructed, conventionally, as shown in FIG. 8, a crushed stone layer 52 is formed at the bottom of a floor excavation hole 51 provided on the ground at the construction site. Based on, a predetermined formwork is installed above the crushed stone layer 52,
Fresh concrete is put into this formwork by casting in place. Then, when the cast-in-place concrete is sufficiently hardened, the formwork is removed, and the surrounding space is filled with backfill soil 56 and compacted to form a rectangular block-shaped foundation 53. Then, on the upper surface side of the foundation 53,
It is customary to place the gate post unit 55 and fasten and fix it with the anchor bolts 54 buried and arranged on the gate post 55 side.

[0003]

However, according to such a conventional construction method, a so-called "wet construction method" in which fresh concrete is cast on site and the foundation 53 is constructed, so that the curing period of cast-in-place concrete is reduced. Due to the necessity, there are problems such as a relatively long construction period, a decrease in workability, and an increase in work cost.

[0004] When a tall structure such as the gate post unit 55 is constructed, it is necessary to sufficiently consider preventing the structure from overturning from the viewpoint of ensuring safety after construction. In this case, according to the conventional method, since the foundation 53 is formed in a rectangular block shape, it is ensured that the structure falls down mainly by the stability of the weight of the foundation 53. There is also a problem that the structure becomes a large and heavy structure (that is, a large structure), it takes time to construct the foundation 53 itself, and a large amount of ready-mixed concrete is required, which leads to an increase in cost.

Accordingly, the present invention has been made to provide a basic block having good workability and low construction cost.

[0006]

Means for Solving the Problems In the present invention, the following configuration is adopted as specific means for solving such problems.

A base block according to the first invention of the present application is integrally formed by molding of concrete, and has a fixed surface portion 1 whose upper surface is used as a mounting and fixing surface of required structures 31, 35, A bottom plate portion 3 extending in the horizontal direction at a position lower than the predetermined height by a predetermined height, and a side wall portion 2 connecting the fixing surface portion 1 and the bottom plate portion 3 in the vertical direction.

According to a second aspect of the present invention, in the basic block according to the first aspect, the outer edge 3 of the bottom plate 3 is provided.
a, a rising rib portion 4 erected on the outer edge portion 3a and extending along the outer edge portion 3a is provided integrally with the outer edge portion 3a.

In the third invention of the present application, the first or the second
In the basic block according to the invention,
And the side wall portion 2, the bottom plate portion 3, and the rising rib portion 4 are formed in a plate-like integrated structure made of reinforced concrete.

[0010]

According to the present invention, the following effects can be obtained by adopting such a configuration.

The foundation block according to the first invention of the present application is integrally formed by concrete molding, and the upper surface thereof is a fixing surface portion 1 on which the required structures 31 and 35 are placed and fixed, and the fixing surface portion 1 The bottom plate portion 3 extends in the horizontal direction at a predetermined height from the bottom plate portion, and the side wall portion 2 connects the fixing surface portion 1 and the bottom plate portion 3 in the vertical direction.

Therefore, according to the basic block of the present invention,
The following effects can be obtained.

(A) The above-mentioned basic block is manufactured in a factory in advance by molding, and is then carried into a construction site and installed to form a foundation. Because it is constructed by the `` construction method, '' the curing period of the ready-cast concrete cast in place is unnecessary as in the `` wet construction method, '' for example, where the foundation is constructed by casting the ready-mixed concrete in-situ. Workability can be improved and construction costs can be reduced.

(B) Since the base block is provided with the bottom plate portion 3 extending laterally at a position lower than the fixed surface portion 1, the base block is installed at the bottom of the floor dig hole 41 and Is backfilled with the backfill soil 44, the weight of the backfill soil 44 above the bottom slab portion 3 (that is, earth pressure) is applied to the bottom slab portion 3, and the earth pressure causes the base block to fall. Acts as a regulating force (in other words, a stabilizing force), and the stability of the base block is favorably maintained. As a result, compared with the case of the conventional cast-in-place foundation, which secures stability mainly by the weight of the foundation,
The weight of the foundation block can be reduced by the amount that the earth pressure of the backfill soil 44 can use, and the cost can be reduced by reducing the amount of concrete material. Workability is improved.

(C) Since the bottom plate portion 3 to be grounded extends laterally beyond the fixing surface portion 1, for example, an upper surface serving as a fixing surface of a structure and a grounding surface as in the case of a conventional site construction base. As compared with the case where the lower surface is substantially the same size, the contact area is large, the resistance to the rotational force in the overturning direction is large, and high stability is secured in the construction state.

According to the basic block according to the second invention of the present application, the outer edge 3a of the bottom plate 3 is attached to the outer edge 3a.
a, and the rising rib portion 4 extending along the outer edge portion 3a is provided integrally with the outer edge portion 3a. When the foundation block is subjected to a turning force in the falling direction while the foundation block is being constructed, the above-mentioned rise can be achieved. The ribs 4 act on the backfill soil 44 in the overturning direction to further enhance the stability of the foundation block.

According to the basic block of the third invention of the present application, the following specific effects can be obtained in addition to the effects described above or above. That is, in the present invention, the fixing surface portion 1, the side wall portion 2, the bottom plate portion 3, and the rising rib portion 4 are
Because it has a plate-like integrated structure made of reinforced concrete,
For example, as compared with the case where the entire base block has a solid structure, the weight of the material concrete can be reduced and the weight of the product can be reduced, so that the cost can be further reduced and the workability can be improved.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a basic block according to the present invention will be specifically described based on some preferred embodiments.

First Embodiment FIG. 1 shows a basic block Z1 according to a _first embodiment of the present invention. The base block Z ₁ is a intended to be used as a basis for elongated structures having a substantially square cross-sectional shape of the pillars unit 31 such as shown in FIG. 2, for example, in advance factory light and high This is a precast product having a plate-like structure integrally formed by molding using high-strength fiber reinforced concrete, and includes a fixed surface portion 1, a side wall portion 2, a bottom plate portion 3, and a rising rib portion 4 described below. .

The fixing surface portion 1 is a portion on which a required structure is placed and fixed. The fixing surface portion 1 is a flat plate having a substantially square planar shape and a predetermined thickness. 7 are provided, and a plurality of bolt holes 5 are provided outside the opening 7.

The side wall portion 2 is composed of four wall members extending continuously downward from the outer edge of each side of the fixed surface portion 1, and two sets of walls opposing each other with the axis thereof interposed therebetween. Working holes 6 and 6 are provided on one side of the body, respectively.

The bottom slab 3 serves as a ground contact portion for the basic block Z ₁ and extends outward from the lower end of the side wall 2 in a direction substantially parallel to the fixing surface 1. And a flat plate having a predetermined thickness and a substantially square planar shape. The outer edge 3a of the bottom slab 3 is provided with a rising rib 4 which is provided upright continuously from the outer edge 3a over the entire periphery of the outer edge 3a.

[0023] Subsequently, the above-described plate-shaped construction process and specific advantages of the structure substructure which is construction using basic block Z ₁ having the structure or the like will be described with reference to FIG.

As shown in FIG. 2, the basic block Z ₁
In the case of constructing the foundation by using the method, first, a substantially square floor excavation hole 41 is provided at the construction site. And this floor dig hole 4
A crushed stone layer 42 having a predetermined thickness is provided at the bottom of the crushed stone layer 1 as a base, and a kneading mortar layer 43 having a low moisture content is provided above the crushed stone layer 42 and the horizontality of the upper surface thereof is adjusted. Thereafter, the base block Z ₁ on the upper side of the air-mixing mortar layer 43, placing the rear surface of the bottom plate portion 3 while being grounded to the air-mixing mortar layer 43.

Next, the fixing surface 1 the basic block Z ₁
Above, together with engaged置衝mounting the fixing portion 32 located at the lower end of the gatepost unit 31, a fixing portion 32 of the fixing surface 1 and the gatepost unit 31 of the base block Z _1, the angle bolt holes 5, 5, each fixing bolt 3 inserted
Fasten and fix with 4, 34,. At this time, to work Hands from the work hole 6, 6 provided in the side wall portion 2 of the base block Z _1.

The basic block Z ₁ and the gate post unit 31
Is completed, the above-mentioned floor excavation hole 41 is backfilled, and the backfill soil 44 is compacted by rolling. In this case, the fixed portion 32 of the gate column unit 31 placed on the fixed surface portion ₁ of the base block Z1 is
The depth dimension of the floor excavation hole 41 is set so as to be buried in 4. The backfill of the floor excavation hole 41 is performed by the base block Z ₁ when the gate column unit 31 is attached.
From the viewpoint of ensuring the stability of the work hole 6, for example, before assembling the gate post unit 31,
It is also possible to perform temporary backfilling to such an extent that the work from the beginning is not hindered.

In [0027] above, the mounting operation of the gatepost unit 31 for the installation work and the base block Z ₁ of the base block Z ₁ are all completed.

In the basic block Z ₁ constructed and constructed as described above, the following specific effects can be obtained.

[0029] That is, according to the basic block Z ₁ according to this embodiment, a said underlying block Z ₁ is precast products are factory produced by previously molding, and so-called "dry does not require a cast-in-place of the fresh concrete Since it is constructed using the `` method of construction, '' for example, the curing period of cast-in-place concrete is not required, as in the case of the `` wet construction method, '' in which the foundation is constructed by casting concrete in-situ, thus shortening the construction period of the foundation. Thus, it is possible to improve construction workability and reduce construction costs.

Further, since the base block Z ₁ is provided with the bottom plate portion 3 which extends in the lateral direction at a position lower than the fixing surface portion 1, the base block Z _{1 is connected} to the floor excavation hole 4.
In the state where it is installed at the bottom of the base plate 1 and backfilled with the backfill soil 44, the weight (that is, earth pressure) of the backfill soil 44 on the upper side of the bottom plate portion 3 is applied to the bottom plate portion 3, and The earth pressure acts as a fall regulation force (in other words, a stabilizing force) of the base block, and the stability of the base block is favorably maintained. As an incidental effect of maintaining the stability due to the earth pressure, the earth pressure of the backfill soil 44 can be used as compared with the case of the conventional ready-cast concrete foundation that secures stability mainly by the weight of the foundation. only the weight of the base block Z ₁ can be reduced in weight, as a result, along with attained is an amount corresponding cost of the required amount of concrete material is reduced, it is easy to handle during construction because it is lightweight construction workability Will be improved.

Further, since the bottom plate portion 3 grounded to the bottom of the floor excavation hole 41 extends laterally beyond the fixed surface portion 1, the ground contact area of the bottom plate portion 3 is increased. greater resistance to the rotation force in the falling direction of the base block Z _1, high stability is assured in the more construction completed state.

Further, since the rising rib portion 4 erected on the outer edge portion 3a and extending along the outer edge portion 3a is provided integrally with the outer edge portion 3a on the outer edge portion 3a of the bottom plate portion 3. ,
The rigidity of the rising rib portion 4 reinforces the bottom plate portion 3 so that the bottom plate portion 3 can be made thinner to further reduce the weight. If the basic block is subjected to a rotational force in the falling direction, the base block Z ₁ from acting on falling control direction with respect to said start-up rib portion 4 is filled Mododo 44
Will be further enhanced.

Furthermore, in this embodiment, since the base block Z ₁ with fiber reinforced concrete and a plate-like structure having a predetermined thickness, as compared with a case such as, for example, the entire basic block and solid structure In addition, the required amount of material concrete can be reduced and the weight of the product can be reduced. As a result, it is possible to further reduce costs and improve workability.

Second Embodiment FIG. 3 shows a basic block Z2 according to a _second embodiment of the present invention. The base block Z _2, the first embodiment be those similarly such basic block Z ₁ and the basic structure in the form is different from the basic block Z ₁ according to the embodiment of the first, the side wall portions The only difference is that the bottom slab 3 provided around the periphery of the side wall 2 is deleted on one side of the side wall 2.

In the basic block Z _{2 having} such a configuration, on the side from which the bottom plate portion 3 is deleted, the basic block Z ₂
Installation of the projecting dimension of the shaft center side, but it since other is smaller than the projecting dimension of the portion, the base block Z ₂ for example from the condition of the foundation construction site Intention to one side of the bed Juana 41 This is a structure suitable for the case where it is required to perform the operation (for example, the case where the gate post unit 31 is installed close to the boundary of the site).

The basic block Z ₂ may be manufactured in advance as a precast product having a shape as shown in FIG. 3. Alternatively, for example, the basic block Z ₁ in the first embodiment may be used and its bottom plate may be used. It is also possible to cut off a part of the part 3 at the construction site to obtain a shape as shown in FIG.

Third Embodiment FIG. 4 shows a basic block Z _{3 according} to a _third embodiment of the present invention. The base block Z ₃ is, for example, intended to be used as a basis for laterally extending long structures 35 such as brick walls, as shown in FIG. 5, a base block Z _1, Z ₂ of each of the above embodiments Similarly, a precast product having a plate-like structure integrally formed by molding using a lightweight and high-strength fiber reinforced concrete in a factory in advance and having a predetermined thickness and extending in a band shape with a predetermined width. A surface portion 1, a flat-plate-shaped side wall portion 2 having a predetermined thickness continuously extending downward from both edges extending in the longitudinal direction of the fixed surface portion 1, and a laterally outer portion continuously extending from a lower end of the side wall portion 2. A bottom plate portion 3 having a predetermined thickness and extending outwardly, and an outer edge portion 3a of the bottom plate portion 3 erected continuously to the outer edge portion 3a so as to surround the outer edge portion 3a of the bottom plate portion 3. Along each side of the fixed surface 1 The end walls 8, 8 are provided with a rising rib portion 4 which is continuous with the end walls 8, 8 and is on the same plane.

Also, bolt holes 5, 5,... Are provided at a predetermined pitch on the upper surface of the fixed surface portion 1, and working holes 6 are formed at a predetermined pitch in the side wall portion 2.

Subsequently, a construction procedure for constructing a foundation extending to a predetermined length by arranging a plurality of the foundation blocks Z ₃ and arranging a block wall 35 above the foundation is as follows.
This will be described with reference to FIG.

As shown in FIG. 5, the basic block Z ₃
In the case of constructing a foundation of a predetermined length by using a plurality of bases, a floor excavation hole 41 having a predetermined width and a predetermined length is provided at a construction site. A crushed stone layer 42 having a predetermined thickness is provided at the bottom of the floor excavation hole 41 over the entire length thereof as a base, and a kneading mortar layer 43 having a low moisture content is provided above the crushed stone layer 42. In addition, the level of the upper surface is adjusted.

Thereafter, a predetermined number of each of the basic blocks Z ₃ , Z ₃ ,... Is placed above the kneading mortar layer 43, and the back surface of the bottom plate portion 3 is grounded to the kneading mortar layer 43. A predetermined number of the base blocks Z ₃ , Z ₃ ,... Are arranged in a row with the end walls 8, 8 being adjacent to each other.

Next, each of the basic blocks Z ₃ , Z ₃ ,.
The rectangular blocks 36 are arranged in multiple rows and multiple stages so as to straddle the respective fixed surface portions 1, 1,... To form the block wall 35. Here, the rectangular blocks 36 forming the block wall 35 are used. As an example, a concrete block that is stacked in a multi-stage manner using a conventional common joint mortar is shown as an example. Therefore, in this case, each of the basic blocks Z ₃ ,
Z _3, rebar 37, 37 ..., it is necessary to previously set a .... Therefore, prior to the work of stacking the rectangular blocks 36, the bolt holes 5, 5,
.. Reinforcing bars 37 are erected and arranged via fixing bolts 38 respectively.

Thereafter, each of the basic blocks Z ₃ , Z ₃ ,
The rectangular blocks 36 are sequentially stacked on the upper side of the fixing surface 1 to form a block wall 35. Then, when the work of stacking the rectangular blocks 36 is completed, or at least when the installation of the first-stage rectangular blocks 36 buried in the backfill soil 44 is completed, the floor excavation hole 41 is backfilled and the backfill soil is removed. 44 is compacted by rolling. In this case, the depth of the floor Juana 41 as a lower portion of the base block Z ₃ of the fixed surface 1 a first stage of the rectangular block 36 which is placed on is embedded in the embedding Mododo 44 Set.

In [0044] above, work of forming the block walls 35 for installation work and the base block Z ₃ of the base block Z ₃ are all completed. Since function and effect of the installation of the base block Z ₃ are the same as in the first embodiment described here omitted.

Fourth Embodiment FIG. 6 shows a basic block Z4 according to a _fourth embodiment of the present invention. Basic block Z ₄ of this embodiment
Is for likewise the third embodiment the base block Z ₃ the basic configuration according to the, is different from the basic block Z ₃ according to the embodiment of the third, the pair of side wall portions 2 The only difference is that the bottom plate portion 3 provided continuously with each of the above is removed from the one side wall portion 2 side together with the rising rib 4 connected thereto.

In the basic block Z _{4 having} such a configuration, on the side where the bottom plate portion 3 is deleted, the basic block Z ₄
Is smaller than the projecting dimension on the opposite side. Accordingly, as shown in FIG. 7, since the base block Z ₄ can be placed closer to one side of the bed Juana 41, for example, from the condition of the foundation construction site the base block Z ₄ floors Juana 41 This is a structure suitable for a case where it is required to be installed close to one side (for example, a case where the block wall 35 is installed close to the boundary of the site).

The basic block Z ₄ may be manufactured in advance as a precast product having a shape as shown in FIG. 6. Alternatively, for example, the base block Z _{3 according} to the third embodiment may be used and the bottom plate thereof may be used. It is also possible to cut off a part of the part 3 at the construction site to obtain a shape as shown in FIG. Further, in this embodiment, since the block wall 35 is configured by using the lightweight block 39, FIG.
As shown in the figure, the lower lightweight block 39 and the upper lightweight block 39 are fastened by fixing bolts 40, respectively.

In addition, the basic block of the present invention is not only applicable as the base of the gate post unit 31 or the block wall 35 as in the above embodiments, but can be widely applied as the base of general structures. It can also be applied as a foundation, foundation for fence posts, etc.

[Brief description of the drawings]

FIG. 1 is a perspective view of a basic block according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a construction state of the foundation block shown in FIG.

FIG. 3 is a perspective view of a basic block according to a second embodiment of the present invention.

FIG. 4 is a perspective view of a basic block according to a third embodiment of the present invention.

FIG. 5 is a sectional view showing a construction state of the foundation block shown in FIG.

FIG. 6 is a perspective view of a basic block according to a fourth embodiment of the present invention.

FIG. 7 is a sectional view showing a construction state of the foundation block shown in FIG. 6;

FIG. 8 is a cross-sectional view showing the state of construction of a foundation by the conventional ready-mixed concrete casting.

[Explanation of symbols]

1 is a fixed surface portion, 2 is a side wall portion, 3 is a bottom plate portion, 4 is a rising rib portion, 5 is a bolt hole, 6 is a work hole, 7 is an opening, 31 is a gate post unit, 32 is a fixed portion, and 33 is a main body portion. , 34 are fixing bolts, 35 is a block wall, 36 is a rectangular block, 37 is a reinforcing bar, 38 is a fixing bolt, 39 is a lightweight block, 40 is a fixing bolt, and Z _{1 to} Z ₄ are basic blocks.

Claims (3)

[Claims] 1. A fixed surface part (1) integrally formed by molding of concrete, and the upper surface of which is a mounting fixed surface of a required structure (31), (35), and a predetermined surface part from the fixed surface part (1). Bottom plate part (3) extending laterally at a low position by height
And a side wall portion (2) for vertically connecting the fixing surface portion (1) and the bottom plate portion (3). 2. An outer edge (3a) of the bottom plate (3) according to claim 1,
A base block characterized in that a rising rib portion (4) erected on a) and extending along the outer edge portion (3a) is provided integrally with the outer edge portion (3a). 3. The plate-like integrated structure according to claim 1, wherein the fixed surface portion (1), the side wall portion (2), the bottom plate portion (3), and the rising rib portion (4) are made of reinforced concrete. Basic block characterized by being.