JP2572354B2 - Reinforced pillar foundation with polymerized tube and its construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basic technology capable of supporting various types of pillars, for example, as a means for strengthening an underground foundation supporting a pillar having a sign board as a large traffic sign. The present invention relates to a reinforced column foundation and a construction method using a polymerized tubular body.

[0002]

2. Description of the Related Art The modern urban environment is undergoing increasingly complex changes, and the spread of various automobiles is causing transportation administration to face various serious challenges. In particular, measures to deal with frequent traffic accidents require urgency, and the cause of the occurrence is being investigated. For the time being, however, various large signs that indicate the course of the vehicle are to be dealt with immediately.

[0003] Such large traffic signs include a method in which a sign board protruding on the road is provided on a column which is independently established on the road side, and a method in which a sign plate which is established opposite to both sides of the road is marked across the road. There is a method of joining the boards. What is particularly problematic is a method in which a sign plate protruding on the road is connected to a pillar body that is independently established on the road side.

[0004] In this system, a part of the signboard is concealed by the green leaves, particularly when the green leaves are prosperous, or the signboard is not concealed but hardly visible. Therefore, it is required to further increase the size of the sign board and further increase the width of the sign board protruding on the road.

[0005] In order to address this need for signage, there is a need for technical means to first strengthen the column and at the same time strengthen the underground foundation that supports it. While strengthening columns is relatively easy, problems exist with underground foundations.

[0006] In the conventional underground foundation, a reinforced concrete foundation was constructed in a hole formed by excavating a large underground. However, in such a construction technique, in addition to treatment of excavated soil, construction It takes a lot of time and date, and considering traffic regulations during that time, it is not in line with the current situation.

However, in recent years, a large H-shaped steel casting method has been developed which has reduced the construction time to several hours and has excellent workability. However, if it were to be further strengthened, it would be inevitable to use a larger H-section steel, and as a result, the noise and vibrations that would occur during the driving would not exceed the permissible limit for the residents of the area. Required.

For this reason, as a means to be developed in the future , a casting method involving generation of noise and vibration should be completely eliminated, and large machine tools which require significant traffic control are required. Means are not required,
Ideally, it can be constructed with a pole car that is widely used nationwide and has an earth auger that is active on ordinary roads.

[0009]

In addition to the above-mentioned conventional casting method, a metal pipe having a diameter of several tens of cm is inserted while excavating a round hole, and at a predetermined depth, a reinforcing steel is inserted into the pipe and concrete is inserted. There is also known a method of constructing a reinforced concrete pile in the ground by pulling out the pipe after pouring it.However, this method does not generate noise or vibration in the casting method, There is a need to install it deep inside, which limits the application of popular type pole cars.

Therefore, on the premise that a single large pipe is applied in place of a small pipe in a construction method in which a single large pipe is applied, a plurality of these small pipes are fixed in the ground and then these pipes are connected. One that is integrated in the ground is also considered. In the basic construction method of integrally connecting a plurality of short pipes, the installation area of the pipes must be large, which hinders effective use of land.

Here, it is possible to use a popular pillar-type vehicle without generating noise, vibration, etc., and furthermore, it is necessary to construct a solid foundation without requiring a large installation area, so that the depth of the ground is It has to use the earth pressure resistance in the direction.

The present invention provides a basic construction technique in which pipes having different lengths and diameters are installed in a multiplex state, and a space between these pipes is filled and solidified with an injection solidifying agent to strengthen the pipes.

[0013]

SUMMARY OF THE INVENTION The present invention relates to an outer tube having a cutting blade at the tip, a longer cutting tube than the outer tube , a cutting blade at one end , and a connecting portion at the other end. The inner pipe having a plurality of injection pipes having different lengths fixed on the outer periphery is installed deeply in the ground, and the injection pipe is solidified through the injection pipe into a gap formed between these pipe bodies. Inject and fill the agent,
It is a foundation and a foundation construction method that are strengthened by solidification of the injection solidifying agent.

In such a foundation, since the pipes are screwed together and an injection solidifying agent is used as a connecting means for these pipes, noise and vibration are extremely low as compared with the casting method. The installation area is smaller than that of the flat installation method, and the injection pipe itself has the same effect as the reinforcing bar, so that the strength of the injection solidifying agent at the time of solidification also increases.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross section of a reinforced column base formed by a polymerized tube of the present invention. FIG. 2A and FIG.
(A) ~
(H) is a diagram showing a specific process. FIG. 3-a is a side view of a centering tool for guiding the earth auger when drilling a hole, and FIG. 3-b is a bottom view of the centering tool. FIG.
This represents the state of the outer tube and the inner tube viewed from AA in -b (e).

In FIG. 1, a cutting blade (1a) is formed so that an outer tube (1) and an inner tube (2) form a gap (C) in a floor dug hole (5) cut into a predetermined size. It is screwed in by (2a) and installed at a predetermined position. An inner pipe (2) screwed into the outer pipe (1) has a flange (2) formed at its upper end.
b) is located at a position lower than the upper end of the outer tube (1), and the lower part of the inner tube (2) is positioned so as to project from the lower end of the outer tube (1). (2) The length is longer than the outer tube (1).

A plurality of injection pipes (2c ₁ ) (2c ₂ ) (2c ₃ ) having different lengths are fixed around the inner pipe (2), and an injection solidifying agent (4) such as mortar, concrete or the like is provided in the gap. (C) is sequentially injected upward from the bottom. At the same time, the injection tube is also embedded by the injection solidifying agent (4).

After the injection solidifying agent (4) is injected to the vicinity of the flange (2b) in the gap (4), the column (3) is connected by bolts through the flange (3a). The cavity of the floor digging hole (5) is injected with a solidifying agent and solidified.

The flanges (2b) and (3a), which are connecting portions between the inner pipe (2) and the column (3), are provided inside the outer pipe (1).
Also, the upper end of the outer tube (1) is completely sealed by the pouring and solidifying agent (4) in the carved hole (5).

Next, a method of constructing the reinforced pillar foundation will be described with reference to the process charts shown in FIGS. 2A and 2B. Fig. 2-a
(A) is slightly smaller in diameter than the outer tube (1) due to the earth auger (A) in the floor digging hole (5) cut in advance to facilitate the screwing of the outer tube (1); In addition, a hole (6) having a depth substantially equal to the length of the outer pipe (1) is preliminarily excavated, and the earth auger (A) is one that is provided in a general-purpose building wheel. Therefore, the excavation and earth removal work will be repeated.

The predetermined hole (6) thus cut out
2- (b) shows a state diagram in which an outer tube (1), which is a part of a reinforced column foundation, is installed at a predetermined position via, for example, an earth auger (A). The driving source is transmitted to the upper end of the outer tube (1) via a tool, and the outer tube (1) is rotated. Since the outer pipe (1) is larger in diameter than the hole (6), the inner surface of the hole (6) is screwed down while being cut off by the cutting blade (1a), and is firmly installed in the ground.

The earth and sand that has been scraped off and deposited on the bottom of the outer pipe (1) installed in this way is removed as required. (C) of FIG. 2-a is a process diagram for removing the accumulated sediment (B). Usually, the earth auger (A) used for the preceding excavation in (a) of FIG. It is rotated while being inserted inside, and is lifted and discharged.

Sediment deposited by earth auger (A) (B)
Is removed, a hole (6 ') for screwing in the inner pipe (2) from the bottom of the outer pipe (1) to a predetermined depth must be cut.

This state is shown in (d) of FIG. 2-a. First, an earth auger (A ') having a smaller diameter than the one used in the preceding excavation (A) is placed in the outer tube (1). It is inserted by using the inner surface of the dispensing tool (7) as a guide, and starts digging from the bottom of the outer tube (1).

The centering tool (7) is pulled up through the hard earth and sand deposited on the screw of the earth auger (A ') during the earth removal after the first excavation, and is removed on the ground. In the case of (1), it will be pulled up by human power, winch or the like.

The diameter of the hole (6 ') is smaller than the diameter of the inner pipe (2), and the hole (6') is firmly installed in the ground by the same operation as when the outer pipe (1) is installed. The state is as shown in FIG.

A plurality of injection tubes of different lengths (2c ₁ )
(2c ₂ ) (2c ₃ ) Inner pipe (2) fixed to the outer periphery
Is rotated and screwed into the hole (6 ') having a smaller diameter than the inner pipe (2) while utilizing the cutting force of the cutting blade (2a). Sediment deposited by cutting (B ')
May be left as it is.

When these two pipes (1) and (2) are fixed at predetermined positions in the ground, the outer pipe (1) and the inner pipe (2)
A void (C) is formed in which a fixing agent for integrating the two tubes (1) and (2) is to be embedded. Next, an injection solidifying agent (4), which is a fixing agent, is sequentially injected into the space (C), and this state is represented by (e) in FIG.

First, when a pouring and solidifying agent (4) such as mortar, concrete or the like is injected from the upper end opening through a pouring pipe (2c ₁ ) having a length reaching the bottom of the outer pipe (1). 4) gradually rises from the bottom of the outer tube (1), embeds the tip of the injection tube (2c ₁ ), and stops rising at a predetermined limit position (4a). Next, an intermediate length injection tube (2c ₂ ) is used as the injection means in the second stage,
The injection solidifying agent (4) is buried to the second position of the gap and stops rising at a predetermined limit position. Furthermore, the injection solidifying agent (4) is embedded via the injection pipe (2c ₃ ) of the minimum length to the third position. The injection tube (2
By filling the gap (C) upward from the bottom of the outer tube (1) with c ₁ ), (2c ₂ ), and (2c ₃ ), the formation of a gap by air, water, or the like can be completely eliminated.

These injection tubes (2c ₁ ), (2c ₂ ), (2
After the injected solidifying agent is injected and filled into the voids (C) one after another via c ₃ ) and solidified (4a) (4b) (4c), the pillars are connected. This state is shown in FIG. See (g).

A flange (2b) is formed at the upper end of the inner pipe (2), which is firmly connected to the inner pipe (2) via an injection solidifying agent in the outer pipe (1), and a column (3) is provided on the flange (2b). ) Flanges (3a) are conveyed and aligned, and then these two flanges (2b) (3a) are joined together by tightening means consisting of bolts and nuts.

Under such a condition, there is still a void portion above the joint portion by the flange and around the floor dug hole (5). These voids are filled by the injection of the solidifying agent (4d), and are shown in FIG.

Incidentally, the specific shape and structure of the centering tool (7) of the earth auger (A ') used in the above-mentioned construction method (see (d) of FIG. 2A) are shown in FIGS. 3-
This will be described with reference to FIG.

The centering device (7) is composed of two half cylinders (7
a ₁ ) and (7a ₂ ) can be engaged and disengaged from each other, and the engagement means (7
d _{1) (at} 7d 2) (7e) was made with integral cylindrical shape by the engagement of (8e).

On the outer periphery of the two semi-cylindrical bodies (7a ₁ ) (7a ₂ ), hanging pieces that extend upward, straddle at least the upper end of the outer tube (1), and guide the earth auger (A ′) (7
b) and spacing pieces (7c ₁ ) (7c ₂ ) for maintaining the cylindrical shape are fixedly provided on the upper and lower portions, and are also provided on the upper and lower outer peripheries of _one of the two semi-cylindrical bodies (7a ₁ ). Is the other (7
a ₂₎ fitting pieces for facilitating guiding and positioning and cylindrical the _(7d 1) _{(7d 2)} is fixed.

When the centering tool (7) is required to maintain a cylindrical state when inserting and removing the centering tool (7) with respect to the outer tube (1), the centering tool (7) must be inserted into the fitting piece. Lower side (7
d ₂ ), an engagement groove (7e) is formed, and the engagement groove (7e) is formed.
A structure may be adopted in which an engaging pin (8e) fixed to the lower end of the outer periphery of the other semi-cylindrical body (7a ₂ ) is engaged.

An alignment tool (7) having such a structure
After being assembled into a cylindrical shape, it is inserted into the outer tube (1) from below by a manpower / winch or the like, using the inclined portion of the spacing piece (7c ₂ ) as a guide end, and installed at a predetermined location.

When the earth auger (A ') is inserted into the cylinder of the centering device (7), and the hole is dug out, sediment larger than the screw diameter is deposited on the screw of the earth auger (A'). Therefore, when the earth auger (A ') is pulled up when discharging the earth, the centering tool (7) is pulled up through the sediment.

With the lifting, the centering member (7) having the above-described simple engagement structure is easily separated into two semi-cylindrical bodies, and is naturally separated from the earth auger.

FIG. 4 shows an installation process of the outer and inner pipes (1) and (2) in the method of constructing a reinforced column ((e) in FIG. 2B).
(See AA) in the inner tube (2)
Is formed by the outer and inner pipes (1) and (2) such that the injection pipes (2c ₁ ), (2c ₂ ), and (2c ₃ ) are fitted into the recesses (2c ₁ ), with a part of the flange (2b) formed at the bottom. This is to cope with the case where the gap is small.

On the other hand, when the gap is large, the upper end of the injection pipe is positioned in the gap (dotted line position (2)
c ′ ₁ ) (2c ′ ₂ ) (2c ′ ₃ )) The processing of the flange may be omitted.

[0042]

According to the reinforced pillar base of the present invention, the inner pipe is formed in a multiple pipe shape having a common axis, and the inner pipe has a larger installation depth than the outer pipe. Therefore, it is possible to obtain extremely large earth pressure resistance even in a narrow place, and by filling the joint between the column and the inner pipe and the position where multiple injection pipes are buried in the outer pipe, filling of the injection solidifying agent・
High strength and excellent durability can be obtained by coating, and according to this method of building a reinforced pillar foundation, there is no obstacle to road traffic during construction work without depending on large equipment. However, the workability at the time of centering can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-section of a reinforced column base formed by a polymerized tube composed of an outer tube (1) and an inner tube (2) longer than the outer tube (1). The injection pipe (2
This represents a state in which both the c ₁ ) (2c ₂ ) (2c ₃ ) and the flange (3a) of the column (3) are covered and bonded by the injection solidifying agent (4).

FIGS. 2-a and 2-b show a method of constructing a reinforced column foundation by a polymerized tube,

FIG. 2 (a) shows a state in which a hole (6) is preliminarily dug by an earth auger (A) to install an outer pipe (1) at the bottom of a floor dug hole (5).

(B) of FIG. 2-a is a step of screwing the outer pipe (1) into the preceding dug hole (6),

[(C)] of FIG. 2-a shows that when the outer tube (1) is screwed in,
This represents a state in which the generated earth and sand (B) is eliminated by the earth auger (A).

(D) of FIG. 2-a is a centering tool (7) on the outer tube (1).
Is inserted, and a hole (6 ') for setting the inner tube is dug through the centering device (7).

(E) of FIG. 2B shows that a space (C) is formed in the outer tube (1), and a joint portion with a column is buried in the outer tube (1). The state with the inner pipe (2) screwed deeper than the bottom of the pipe (1) is shown,

(F) of FIG. 2-b shows the longest injection pipe (2c ₁ ) among the injection pipes (2c ₁ ), (2c ₂ ), and (2c ₃ ) fixed on the outer periphery of the inner pipe (2). Represents a state in which the injection of the injection solidifying agent (4) is started through the outer tube (1), and the outer tube (1) is filled from the bottom.

(G) of FIG. 2-b shows that the injection pipe fixed to the inner pipe (2) is successively switched and used to fill and solidify the injection solidifying agent (4).
a) After performing (4b) and (4c), the column (3) becomes the inner tube (2).
Indicates a state that is about to be combined with

FIG. 2-((h)) shows that after the column (3) has been joined to the inner pipe (2), the remaining voids including the floor pit (5) are injected with the solidifying agent (4d). Indicates the state of being embedded by throwing.

FIGS. 3A and 3B show a grounding of the earth auger (A ') when the inner tube (2) installation hole (6') shown in FIG. Centering tool (7) for guiding out
FIGS. 3A and 3B are side and bottom views, respectively, showing a configuration in which when being lifted to the ground by an earth auger (A ') or the like, it is easily bisected and can be removed from the earth auger (A').

FIG. 4 shows a configuration viewed from AA when the inner tube (2) and the outer tube (1) shown in (e) of FIG. This shows a state in which the upper end of each injection pipe fixed in 2) is fitted to the flange (2b) and is located in the gap.

[Explanation of symbols]

1 ... flange 2c ₁ which is formed on the cutting edge 2b ... inner tube (2) of the outer tube 1a ... outer tube (1) Cutting edge 2 ... inner tube 2a ... inner tube _{(2), 2c 2, 2c} 3, 2c 1 , 2c ₂ , 2c ₃ ... injection pipe of injection solidifying agent (4) 3 ... column 3a ... flange for connecting to inner pipe (2) 4 ... injection solidifying agent of mortar, concrete, etc. 4a ... longest injection pipe Injection solidification agent filled through the injection pipe of intermediate length 4b ... Injection solidification agent filled through the shortest injection pipe 4c ... Injection solidification agent filled through the shortest injection pipe 4d ... Floor drilling hole (5) and injecting solidification agent 5 that is turned solidified into residual gaps ... YukaHoriri holes 6 ... YukaHoriri hole (5) bottom hole 7 ... centering device is hole 6 ... Lisa Nakahori preceded digging the portion 7a ₁ 7a ₂ ... semicylindrical member 7b ... Tsushitahen 7c _1, 7c 2 _... distance piece 7d _1, 7d 2 _... fitting pieces 7e ... fitting Pieces (7d ₂₎ engaging pin applied to the formed engaging grooves 8e ... engagement groove (7e) in A, A ... earth auger B ... outer tube (1) occurs when screwed sediment B ... within Sediment generated when the pipe (2) is screwed in. C: An injection solidifying agent (4) formed by the outer pipe (1) and the inner pipe (2).

Claims (3)

(57) [Claims] 1. An outer tube (1) having a plurality of cutting blades (1a) at one end, and a plurality of cutting blades (2a) longer than the outer tube (1) and having one end. ) and and the connecting portion to the other end (different lengths injection tube of the outer circumference with equipped <br/> a 2b) (2c ₁₎
(2c ₂ ) (2c ₃ ) fixed inner tube (2), pillar (3) provided with connecting portion (3a) at lower end, injection solidifying agent (4)
And an inner pipe (2) screwed and installed in the ground and an inner pipe (2) screwed and installed in the ground at the bottom of the outer pipe (1) and coupled with the pillar (3). said injection pipe _{(2c 1) (2c 2)} (2c 3) reinforced columnar body according to polymer tube, characterized in that it is filled to solidify the injected solidifying agent (4) through the gap (C) formed by the Foundation. 2. A connecting part ( 2b ) of an inner pipe (2) screwed and installed in an outer pipe (1) screwed and installed in the ground together with a connecting part (3a) of a pillar (3). It is located so as to be buried in the outer tube (1), and at least the two connecting portions ( 2b ) (3)
reinforcing pillar foundation by polymerization tube of claim 1 in which a) is characterized in that it is covered by the injection solidifying agent (4). 3. An outer tube provided with a plurality of cutting blades (1a) at one end to a hole (6) preliminarily dug by an earth auger (A) and having a diameter slightly larger than the hole (6). (1)
Was screwed into the installation, this time, the sediment was optionally collapsed to the external tube (1) in the deposited eliminated by the ground auger (A), then the other grounded to the outer tube (1) in Ogre
After inserting the centering tool (7) which is raised with the lifting of (A '), the earth auger (A') digs the hole (6) through the centering tool (7) to a predetermined depth through the centering tool (7). ') is formed, intermediate digging holes (6' to), than slightly larger diameter, yet the outer tube from the middle digging holes (6 ') (1) a long, multiple cutting edges at one end ( 2a) and the other end
And an inner pipe (2) in which a plurality of (2c ₁ ) (2c ₂ ) (2c ₃ ) injection pipes of different lengths are fixedly provided on the outer periphery of the inner pipe (2). It is screwed and installed so as to be buried in the outer tube (1), and the injection tube is inserted into the long tube (2c ₁ ) in the space (c) formed by the outer tube (1) and the inner tube (2). )
The injection solidifying agent (4) is filled (4a), (4b), and (4c) while sequentially switching the injection to the short tubes (2c ₂ ) and (2c ₃ ), and then to the connecting portion ( 2b ) of the inner tube (2). The connecting portion (3a) of the column (3) is joined, and the remaining solid space is injected into the solidifying agent (4).
(4d) and (5) to cover the joints and the like.