JP7116516B1 - Strut fixing method - Google Patents

Abstract

An object of the present invention is to enable an operator to manually install and remove a post easily and in a short period of time without substantially sacrificing the strength achieved in the post. SOLUTION: The post fixing method repeats the driving and pulling out of the pile into the ground, and after each pulling out, puts sand as a filling material into the vertical hole created in the ground, and then repeats. With each driving operation, the same pile gradually spreads the sand thrown into the vertical hole and the surrounding soil outward and compacts it. A pile driving process in which the piles are left in the ground in a protruding state, thereby fixing the piles to the ground, and after the piles are fixed to the ground, the posts are erected using the parts of the piles fixed to the ground that protrude from the ground surface. and a strut connection step for connecting the piles coaxially and in contact with each other. [Selection drawing] Fig. 8

Description

TECHNICAL FIELD The present invention relates to a technique for manually driving at least one pile into the ground and using the pile as a foundation to fix at least one post to the ground. and/or improve the accuracy of the position and orientation of the pile as it is driven into the ground.

Ground-fixed pillars are sometimes used to support a structure at an elevated position (high or low) above the ground.

Here, in one example, "high place" means a place at a height of 2 m or more from the base surface (e.g., ground surface, scaffolding on the ground that is the ground surface), whereas "low place" , means a place below that height.

The above-mentioned "struts" are also called poles, posts, etc., and are configured, for example, as steel or plastic round pipes, square pipes, or the like. In addition, the pillars may be carried into the site as ready-made products, or may be built on site.

The above-mentioned "structure" includes, for example, a structure that displays information, such as a signboard (e.g., a display board for commercial advertising), a guide board or a sign (e.g., traffic sign, traffic signal, etc.) (See, for example, Patent Documents 1 and 3.) and enclosures such as protective fences and temporary enclosures (See, for example, Patent Documents 2 and 4.).

The "structure" includes a structure that is installed outdoors and is exposed to wind, rain, and snow (for example, a signboard) and a structure that is installed indoors.

In addition, as a type of supporting a "structure" with a pillar, a type supported by one pillar (single leg type), a type supported by multiple pillars extending parallel to each other (double leg type), etc. be. If the strut is a double-legged type, it has the advantage of having higher torsional rigidity around the vertical axis than a single-legged strut. As long as it is normal, there is an advantage that tilting and overturning of the column can be prevented.

There is a prefabricated pile construction method for fixing piles to the ground. The prefabricated pile construction method is a method of driving prefabricated piles (for example, steel or concrete, solid or hollow structure) into the ground.

As ready-made pile construction methods, there are a driven pile construction method and an embedded pile construction method.

The driven pile construction method is a construction method in which ready-made piles (for example, made of steel or concrete) are driven into the ground by the impact force of a hammer without drilling a pilot hole in the soil in advance.

Here, the "hammer" includes a manual hammer and a piling machine (for example, an air hammer) as a construction machine (automatic hammer). As a manual hammer, there is a large hammer with a metal lump attached to the tip of a long handle that is gripped by the operator, and is used by swinging down by the operator, or by the operator's hand against gravity. Some hit the pile by free fall after being lifted.

On the other hand, the embedded pile construction method is a process of excavating the ground to a predetermined depth to form a pilot hole and inserting a ready-made pile into the pilot hole. As the embedded pile construction method, there is a method called a root winding construction method (see, for example, Patent Document 3). This root winding construction method is, for example, a construction method in which an enlarged concrete bulb is formed at the lower end of the pile.

According to this root wrapping method, a pilot hole is excavated in the ground in advance, and crushed stones are put into the bottom of the pilot hole and tamped down. Next, insert a post into the prepared hole, and use a temporary brace or the like to set the post straight so that it does not tip over. After that, ready-mixed concrete is poured into the pilot hole so as to surround the perimeter of the support. The ready-mixed concrete is then allowed to set, thereby securing the stanchions.

If this root wrapping method is used, the service life of the concrete foundation is usually long, such as 20 to 30 years.

However, with this root wrapping method, it is essential to perform processes such as excavating the ground to prepare pilot holes, temporarily supporting the columns, and creating a concrete foundation. This root wrapping method is not suitable for cases where the period of use is short and the frequency of removal is high.

Patent Literature 1 discloses a technique of driving piles into the ground and fixing posts using the driven piles. However, this document only discloses the point of using piles to press the posts against the ground surface (ground surface) after the posts are installed, and the piles are pushed into the ground after the piles are driven into the ground. It does not disclose the point of connection to the stanchion nor the coaxial connection of the pile to the stanchion. Furthermore, this document does not disclose driving the pile into the ground while guiding it up and down.

Patent Literature 2 discloses a technique of repeatedly applying a striking force to a pile and driving the pile deeply into the ground step by step. However, this document only discloses that a pilot hole is excavated in the ground by pulling out the pile after driving it into the ground, and a post is inserted into the pilot hole. It does not disclose that the piles are placed in the ground and that the upper ends of the placed piles are connected to the lower ends of the posts.

Furthermore, like Patent Document 1, this document also does not disclose that a pile is driven straight into the ground using a pile guide that guides the pile itself so that it can move up and down. Specifically, this document discloses that piling is performed using a tool called a guide rod. It is not used to slidably guide the pile itself up and down.

Patent Literature 3 is originally related to the above-mentioned neck wrapping method, and is silent about the driving pile method. According to this document, when a vertical hole is excavated in the ground with an unexpected inclination, the pile is also inclined and erected in the vertical hole accordingly, and as a result, the verticality of the post inserted into the pile is is disclosed at the point where In addition, this document discloses coaxially connecting the pile to the post after the pile has been cast with concrete in the ground. However, this document does not disclose that the posts are fixed by directly using the piles fixed in the ground, or that the piles fixed in the ground and the posts are connected in a mutually contacting manner. do not have.

Patent Literature 4 discloses a technique for driving piles into the ground. Furthermore, this document discloses that the pile itself is driven into the ground while being guided so that it can move up and down. However, this document also states that neither the connection of the pile to the post nor the coaxial connection of the pile to the post after the pile has been driven into the ground can be made with the pile in mutual contact with the post. It does not disclose the point of connection.

Patent Document 5 discloses an embedded pile construction method as a pile construction method, but does not say anything about the driven pile construction method. Furthermore, this document does not disclose the point of dividing the post into a part lying on the ground and a part lying in the ground acting as a foundation and treating the latter part as a pile.

Furthermore, in this document, as a drawback when adopting the embedded pile construction method, when a large wind pressure acts on the structure supported on the ground by the upper end of the support buried in the ground at the lower end, the support will be damaged. It is pointed out that there is a possibility that the strength may not be stable.

Furthermore, this document describes the cast-in-place pile construction method, that is, first excavating the ground to create a pilot hole, then dropping a cylindrical rebar assembled on site into the pilot hole, and then pouring fresh concrete. If the pile is built by pouring the concrete into the pilot hole and solidifying the concrete, the strength is certainly more stable than when using the embedded pile method, but it requires a lot of labor (man-hours, construction period, etc.) to remove the support. ) and costs.

Japanese Utility Model Laid-Open No. 58-21177 JP-A-7-189529 Japanese Patent Application Laid-Open No. 2004-190241 JP-A-10-37194 JP 2014-001542 A

In this way, there are various methods in the pile construction method, each of which has advantages and disadvantages. Therefore, it is necessary to select a pile construction method that is suitable for the site (e.g. topography, soil quality, natural phenomenon, etc.) and application (e.g. average usage period, etc.) from among those pile construction methods, based on various circumstances related to the site and use. There are various factors that should be taken into consideration at that time. These factors include, for example, the size of the pillars, the average years of use of the pillars, factors related to the construction period for installing and removing the pillars, and factors related to the construction costs for installing and removing the pillars.

In order to fulfill the mission of stably supporting the structure to be supported in the air in the environment of the installation site (e.g. wind pressure, rain, snow accretion, vibration, etc.), certain strength requirements are imposed on the columns. be done.

The strength requirements imposed on a stanchion depend on the weight and size (especially the height dimension of the stanchion) of the stanchion and the structure supported by the stanchion. In general, given the structural environment in which a structure is held above the ground, the weight rank of the structure is determined by the height dimension of the structure (that is, the pillars that support the structure). , which is roughly comparable to the length of the

In addition, the strength requirements imposed on the stanchions also depend on the average age of the structure in service at the same site. Therefore, if a strut has a short average service life but is subject to stronger strength requirements than its commensurate strength requirement, the strut will be over-quality in terms of strength, leading to waste.

Therefore, for convenience of explanation, the types of struts are classified into three according to the length of the struts. Specifically, the type of the strut is classified into a small strut with a length of less than 2 m, a medium-sized strut with a length of 2 m or more and less than 4 m, and a large strut with a length of 4 m or more.

Specifically, for example, a small-sized post includes a signboard installed in a vacant lot for a short period of time, and a medium-sized post includes, for example, a parking lot (bicycle parking lot), as illustrated in FIG. ), pedestrian traffic lights, and road signs, and large-sized posts include, for example, traffic lights for vehicles (for example, 4.5 m or more).

Columns are subject to high strength requirements if large, medium strength requirements if medium, and low strength requirements if small.

Usually, in order to meet high strength requirements, the piles supporting the posts are anchored to the ground with concrete foundations and fillers by the above-mentioned root winding method. Also, usually to meet the low strength requirements, the piles supporting the posts are simply driven into the ground by a simple driven pile construction method, without the use of concrete foundations or fillers, so that the piles are attached to the ground. Fixed.

Conventionally, there has been no piling method suitable for achieving a strength level intermediate between that achieved by the root winding method and that achieved by the simple driving pile method.

In response to this, the present inventor conducted development research on a pile construction method suitable for achieving an intermediate strength level. At that time, the inventor suddenly needed to remove the signboard, such as the above-mentioned parking signboard used by the contractor who temporarily manages the land as a parking lot on behalf of the landlord, Assuming a structure whose length of continuous use is unstable, the following requirements were selected.

(1) Average years of use

The present inventor set the maximum period of use of the pillars to about five years, based on the past statistics on the use results of the above-mentioned parking signboards. Therefore, if the neck wrapping method is adopted, the strength level achieved by it (for example, service life of about 20 to 30 years) is excessive.

Therefore, the present inventors have researched and developed a new pile construction method suitable for achieving a strength level that is efficient in relation to the maximum period of use of the pillar.

(2) Bending strength

In general, it is necessary for a support to realize safety and reliability to such an extent that the support does not tilt or collapse even if the ground is soft or the wind is strong. In other words, it is necessary to secure the required degree of compaction of the ground and the bending rigidity of the pillars (deflection characteristics due to wind load as a lateral load). Therefore, the strength level achieved by the simple driving pile construction method is insufficient.

Furthermore, when using a support that is fixed to the ground, the support does not tilt or collapse due to the bending moment generated in the support due to the wind pressure acting on the structure when the structure is in use. It is important to consider

The bending moment acting on the column due to the wind pressure is calculated near the ground surface (for example, the column is a quasi-cantilever beam as a structure that is approximated by material mechanics (assuming that the ground is a completely rigid body (the maximum ground reaction force) It is known that the bending mode of the quasi-cantilever beam (which can be approximated to the cantilever beam if possible) is maximized at the bending starting point of the quasi-cantilever beam (the fixed end in the cantilever beam).

In addition, when adopting a structure in which the support is indirectly fixed to the ground by connecting the support to a pile fixed to the ground, instead of directly fixing the support to the ground, it is called a support and a pile. It is necessary to connect a plurality of individual parts to each other.

The joints of the columns and piles are usually placed on the ground, ie on the columns, where the externally acting bending moment is maximized. For this reason, the inventors of the present invention have recognized that the type of structure to be adopted for the connecting portion is an important factor that determines the strength of the support column's resistance to the bending moment. And the maximum bending moment increases as the column length increases.

Therefore, the present inventor has developed a structure that connects a pile and a support so that a sudden change in the section modulus between the two members is suppressed, thereby reducing stress concentration at the connection portion of the two members. devised.

(3) Accuracy of orientation (position and angle) of piles fixed to the ground

The verticality of a pile fixed to the ground is the angle at which the center line of the pile fixed to the ground is inclined with respect to the direction of gravity, that is, the vertical direction, that is, the deviation of the center line of the pile from the vertical direction means corner. The closer the verticality of the pile is to 0, the closer the center line of the pile is to the direction of gravity.

By the way, when a structure is supported by a column, the structure is generally arranged at or near the head of the column. Therefore, when the column is installed with an inclination from the vertical line, the weight of the structure always acts on the column as an eccentric load, and as a result, a bending moment acts on the column. This bending moment always loads the strut and in some cases can cause fatigue failure of the strut and should be reduced or eliminated.

On the other hand, when a post is connected to a pile fixed to the ground, in other words, when the apparent post (when the post and the pile are viewed as a single post) adopts a two-part structure, the post The verticality depends on the verticality of the pile. Therefore, the inventor recognized that fixing the pile to the ground with good verticality is essential for good verticality of the pillar.

Therefore, the present inventors have found that regardless of the number of pillars that support one structure, the verticality of the piles fixed to the ground is improved, thereby increasing the verticality of the pillars connected to the piles. In addition, it is devised so that an unexpected bending moment does not occur in the strut, especially at the bending start point of the strut.

In addition, when one structure is supported by multiple pillars parallel to each other and these pillars are connected to multiple piles, during the work of fixing the multiple piles to the ground, the distance between the piles It is required to improve the accuracy, the verticality of each pile, and the parallelism of multiple piles.

The reason for this is that, as will be described later, when the erection of the signboard is completed, its multiple supports are attached to multiple stakes fixed to the ground, that is, the relative position is fixed ( A specific description will be given by taking as an example a case in which a plurality of piles (constrained to each other) are assembled to a plurality of posts whose relative positions are fixed (constrained to each other).

In this case, if a connection structure is adopted in which the plurality of posts are coaxially connected to the plurality of piles (for example, a structure in which one member is inserted into the hollow hole of the other member), the support post In each case, if the posts and the stakes to be connected to each other are not arranged in a straight line so that they match both in terms of position and direction, it is difficult to assemble a plurality of posts, that is, a signboard, for example, to a plurality of stakes. becomes impossible.

More specifically, when a plurality of piles are fixed to the ground, if there is an error in the pile spacing and/or the pile verticality, the upper end of the portion of the pile protruding from the ground surface (that is, the pile The part that should be connected to the lower end of the column) shifts laterally from the target position. At this time, at the upper end of the portion of the pile protruding from the ground surface, the position error of the connection point with the ground of the pile is the error Δθ of the verticality of the pile, and the pile protruding from the surface. It tends to appear as amplified depending on the length L of the portion.

Therefore, if a plurality of posts are forcibly assembled to a plurality of piles in spite of this, prying occurs between the two, and unexpected residual stress is generated in each structural member. In particular, if the residual stress is tensile stress, it can cause cracks to occur in each structural member.

Therefore, the present inventors have found that when the number of pillars supporting one structure is plural, the errors in the position and orientation of the piles fixed to the ground are reduced, so that the number of pillars can be reduced. It was devised so that it could be easily attached to the pile of books.

In addition, when the pillars are fixed to the ground by the above-mentioned root wrapping method, since one continuous pillar exists straddling the ground and the air, the orientation of the multiple pillars fixed to the ground It is assumed that errors are unlikely to pose problems in assembling the struts, or if they do exist at all.

In particular, as described below, a pair of stanchions, with their relative positions fixed (e.g., when the erection of a signboard has been completed), is placed in each pilot hole before the respective concrete foundations have set. When inserted, the geometric error between the pair of struts does not introduce any new serious problems.

(4) Construction period and cost

As noted above, the category of stanchions to which the inventor is concerned has a short maximum lifespan. As a result, the construction period for installing and removing the stanchion is lengthened, which in turn increases the construction cost and reduces the net profit obtained from the use of the stanchion. As a result, depending on the case, construction costs may put pressure on the net profit, and the business involved in the pillar may go bankrupt financially.

Therefore, in order to shorten the work period for installing and removing the pillars, the present inventors have found that workers can install and remove the pillars by simple manual work using simple tools instead of heavy machinery. I devised it so that it can be done.

By the way, according to the above-mentioned neck wrapping method, it can be expected that the strength of the support can be managed without anxiety, judging from the present inventor's achievements so far. However, in this neck wrapping method, it is necessary to carry in and out heavy machinery, excavate the ground for preparing pilot holes using the heavy machinery, temporarily support the pillars, and create a concrete foundation for the installation work of the pillars. As a result, it is necessary to carry in and out heavy machinery, excavate the ground using the heavy machinery, and remove the concrete foundation using heavy machinery, even in the work of removing the pillars. As a result, the construction period tends to be extended and the construction cost tends to increase.

Therefore, this neck-wrapping method is not suitable for the post that the present inventor is paying attention to in terms of construction period and construction cost.

In short, the present inventors have found that it is possible to easily and quickly install and remove columns manually by workers without sacrificing the strength that has hitherto been achieved for medium-sized columns. Research and development was carried out on the method of fixing the pillars.

However, the strut fixing method as a product of this research and development can be applied not only to medium-sized struts, but also to small struts and to large struts. Furthermore, the post fixing method as a product of this research and development can be applied to fixing the post to soft ground, or to hard ground (for example, hard ground, good ground, strong ground, solid ground). It is also possible to apply when fixing

Against the background of the above-described circumstances, the present invention provides a method for installing and removing a support post easily and in a short period of time manually by an operator without substantially sacrificing the strength achieved in the support post. The objective is to provide a method of securing a stanchion that allows for and/or to provide effective tools for effectively implementing the method.

To solve that problem, according to a first aspect of the present invention, instead of using a concrete foundation, an operator constructs at least one pile having a generally circular cross-section with a straight portion and a pointed lower end. A method for fixing at least one post to the ground by striking a thing having
The pile is repeatedly driven into and pulled out of the original ground in which no pilot hole has been excavated in advance, and each time the pile is driven, a vertical hole is formed in the ground by itself, and the vertical hole that appears each time is pulled out. Sand is put into the pit as a filling material, and by each subsequent repeated driving, the same pile gradually spreads the sand put into the vertical hole and the surrounding soil outward and compacts it. a piling step of leaving the pile in the ground with its upper end protruding from the ground surface upon completion of compaction, thereby fixing the pile to the ground;
a post connection step of coaxially connecting the post to the pile using a portion of the pile fixed to the ground that protrudes from the ground surface after the pile is fixed to the ground;
A method of securing a stanchion is provided, comprising:
Also, according to the second aspect of the present invention, instead of using a concrete foundation, an operator manually drives at least one pile into the ground and uses the pile as a foundation to erect at least one post in the ground. a method of fixing to
The piles are repeatedly driven into and pulled out of the ground, and after each pull-out, sand is put into the vertical hole created in the ground as a filling material. , the sand thrown into the vertical hole and the surrounding soil are compacted while gradually spreading outward, and when the compaction is completed, the pile is inserted into the ground with its upper end protruding from the ground surface. a piling step of placing and thereby fixing the pile to the ground;
A post connection step of coaxially connecting the post to the pile using a portion of the pile fixed to the ground that protrudes from the ground surface after the pile is fixed to the ground;
Prior to the first driving, a worker uses a pile guide device for guiding the pile so that it can move up and down while it is in contact with the outer peripheral surface of the pile, and a pile positioning device for positioning the pile on the ground surface in the horizontal direction. A guide installation process of installing a thing having a through hole for the pile to penetrate
A method of securing a stanchion is provided, comprising:
The present invention provides the following aspects. Each aspect is divided into sections, each section is numbered, and the numbers of other sections are referred to as necessary. This is to facilitate understanding of some of the technical features that can be employed by the present invention and combinations thereof, and the technical features that can be employed by the present invention and combinations thereof are limited to the following aspects. should not be interpreted as That is, it should be construed that the technical features described in this specification, which are not described in the embodiments below, are appropriately extracted and adopted as the technical features of the present invention.

Furthermore, it should be noted that stating each paragraph in a format that refers to the numbers of other paragraphs does not necessarily prevent the technical features described in each paragraph from being separated and independent from the technical features described in other paragraphs. It should be construed that the technical features described in each section can be made independent as appropriate according to their nature.

(1) A method in which an operator manually drives at least one pile into the ground instead of using a concrete foundation and uses the pile as a foundation to fix at least one post to the ground,
The piles are repeatedly driven into and pulled out of the ground, and after each pull-out, sand is put into the vertical hole created in the ground as a filling material. , the sand thrown into the vertical hole and the surrounding soil are compacted while gradually spreading outward, and when the compaction is completed, the pile is inserted into the ground with its upper end protruding from the ground surface. a piling step of placing and thereby fixing the pile to the ground;
After the pile is fixed to the ground, a post connection step of connecting the post to the pile coaxially and in contact with each other using a portion of the pile fixed to the ground that protrudes from the ground surface. How to fix the strut.

(2) Furthermore,
Prior to the first driving, a worker uses a pile guide device for guiding the pile so that it can move up and down while it is in contact with the outer peripheral surface of the pile, and a pile positioning device for positioning the pile on the ground surface in the horizontal direction. The post fixing method according to item (1), including the step of installing a guide having a through hole for a pile to pass through.

(3) the pile guide includes a guide pipe into which the pile is axially slidably fitted;
The post fixing method according to item (2), wherein the guide installation step includes a step of installing the pile guide device relative to the pile positioning device so that the guide pipe penetrates the through hole. .

(4) In the guide installation step, after the pile positioning tool is installed on or near the ground surface, an operator uses the through hole of the installed pile positioning tool as a visual target to A post fixing method according to item (2) or (3), including the step of positioning the pile guide.

(5) The pile guide tool,
a guide pipe to which the pile is axially slidably fitted;
an orientation adjustment mechanism for adjusting the orientation of the guide pipe;
(2) to (4), wherein the guide installation step includes a step of adjusting the orientation of the pile guide device so that the guide pipe extends in the vertical direction by using the orientation adjustment mechanism. The support fixing method according to any one of .

(6) Furthermore,
Prior to the post connecting step, a worker removes the pile guide device from the ground surface while leaving the pile positioning device on the ground surface, including a guide removal step,
In the post connecting step, after the pile guide is removed from the ground surface, (a) a worker coaxially covers a portion of the pile protruding from the ground surface with a reinforcing sleeve; and coaxially covering the hollow hole of the lower end of the column over the reinforcing sleeve, thereby connecting the pile and the column together in a triple-tube structure through the reinforcing sleeve. (3) or (5) The post fixing method according to the item.

(7) Furthermore,
Prior to the post connecting step, a worker removes the pile guide device from the ground surface while leaving the pile positioning device on the ground surface, including a guide removal step,
In the post connecting step, after the pile guide is removed from the ground surface, (a) a worker coaxially covers a portion of the pile protruding from the ground surface with a hollow hole at the lower end of the post, thereby , inserting the protruding portion coaxially into the hollow bore; and (b) fixing, joining or fastening the lower end to the protruding portion, thereby separating the pile and the post into two. The column fixing method according to item (3) or (5), in which the columns are coaxially connected to each other in a double cylinder structure.

(8) The at least one post is used for posting information display structures including signboards, information boards or signs, or for fixing protective fences (1) to (7). ) The strut fixing method according to any of the items.

(11) A method in which an operator manually drives at least one pile into the ground instead of using a concrete foundation and uses the pile as a foundation to fix at least one post to the ground,
An operator strikes the pile at its top with a hammer so that the top of the pile protrudes above the surface of the ground, manually into the original ground where the shaft has not been previously excavated. and
After the first driving is completed, the worker manually pulls out the driven pile from the ground using a pile puller, thereby forming a vertical hole in the ground;
After the first extraction is completed, an operator manually puts sand as a filler into the vertical hole;
After the first injection of sand, the worker repeats the driving step, the pulling step and the injection step in order using the same pile, whereby the same pile is filled with sand and sand injected into the vertical hole. a compaction process in which the surrounding soil is compacted while being gradually expanded outward;
once the target compaction properties of the sand and surrounding soil have been achieved, placing the pile into the ground with its upper end protruding above the ground surface, thereby securing the pile to the ground;
a connecting step in which, after the pile is fixed to the ground, a worker inserts a part of the pile fixed to the ground that protrudes from the ground surface into a hollow hole at the lower end of the support to connect the two; Including stanchion fixing method.

(12) Furthermore,
Prior to the first driving, the worker manually prepares to install a pile guide tool that guides the pile vertically so that the lower end of the pile should start entering the target site on the ground surface. process and
The post fixing method according to item (11), further comprising: a removal step of manually removing the pile guide by an operator after the pile is fixed to the ground.

(13) The connecting step includes
After removing the pile guide, a worker manually inserts the part of the pile fixed to the ground that protrudes from the ground surface into the hollow hole at the lower end of the support, and the end face of the lower end of the support is in the ground. An insertion step of inserting to a position where it is buried in
After the insertion, a fastening step of fastening the pillar and the pile by using a fastener by an operator.

(14) The pile guide device is constructed by connecting a plurality of pipes crossing each other using a plurality of orthogonal clamps so as to form a generally rectangular parallelepiped shape, and the plurality of pipes are: The post fixing method according to any one of items (11) to (13), wherein the number of guide pipes is the same as that of the at least one pile, and each pile is slidably inserted into each guide pipe.

(15) the plurality of pipes have three or more support pipes erected on the ground in a posture parallel to each other, each of the support pipes having a height adjustment mechanism independently of each other; (14) The post fixing method according to item (14), whereby the orientation of the pile guide is adjusted three-dimensionally to adjust the perpendicularity of the guide pipe.

(16) the at least one pile comprises a plurality of piles;
said at least one strut comprises the same number of struts as said plurality of piles;
The pile guide device is configured to guide the plurality of piles so as to be vertically movable along a plurality of center lines parallel to each other,
The strut fixing method further comprises:
Prior to the first driving, a pile spacing regulating tool that defines a target pile spacing that the plurality of piles should be separated from each other in a plan view is manually placed on the ground surface by a worker, or A pile interval setting tool installation step of installing a pile spacing regulation device that is used by being at least partially buried in the ground in accordance with a plurality of target portions on the ground surface where the plurality of piles are to be driven, respectively;
The pillar according to any one of items (11) to (15), including an burying step of burying and retaining the pile interval regulation device in the ground without removing the pillar and the pile after the pillar and the pile are fastened. Fixed method.

(17) The pile interval regulation tool has a plurality of through holes through which each pile should pass, at the same interval as the target pile interval,
The preparatory step includes, after the pile spacing regulating device is installed, a worker positioning the pile guide device using each through hole of the installed pile spacing regulating device as a visual target. The post fixing method according to item (16).

(18) The pile guide device according to any one of items (12) to (15).

(19) The pile interval regulation device according to item (16).

(20) The pile interval regulation device is left on or near the ground surface with the plurality of piles fixed to the ground,
The pile spacing device horizontally joins the plurality of piles together, thereby mechanically holding the piles together such that the piles are substantially prevented from moving toward or away from each other. A pile spacing regulating device according to paragraph (19) which acts as a restraining tie bar.

(31) A method in which an operator manually drives at least one pile into the ground instead of using a concrete foundation and uses the pile as a foundation to fix at least one post to the ground,
A pile driving step of fixing the pile to the ground by driving the pile into the ground;
After the pile is fixed to the ground, a post connection step of connecting the post to the pile coaxially and in contact with each other using a portion of the pile fixed to the ground that protrudes from the ground surface. How to fix the strut.

(32) Furthermore,
Prior to driving the pile, a worker may use a pile guide tool for vertically moving the pile in contact with the outer peripheral surface of the pile, and a pile positioning tool for positioning the pile on the ground surface in the horizontal direction. The post fixing method according to item (31), including the step of installing a guide having a through hole for a pile to pass through.

(33) The pile guide includes a guide pipe into which the pile is axially slidably fitted,
The post fixing method according to item (32), wherein the guide installation step includes a step of installing the pile guide device relative to the pile positioning device so that the guide pipe penetrates the through hole. .

(34) In the guide installation step, after the pile positioning tool is installed on or near the ground surface, an operator uses the through hole of the installed pile positioning tool as a visual target to A post fixing method according to paragraph (32) or (33), including the step of positioning a pile guide.

(35) The pile guide tool is
a guide pipe to which the pile is axially slidably fitted;
an orientation adjustment mechanism for adjusting the orientation of the guide pipe;
Items (32) to (34), wherein the guide installation step includes a step in which the operator uses the orientation adjustment mechanism to adjust the orientation of the pile guide device so that the guide pipe extends in the vertical direction. The support fixing method according to any one of .

(36) Furthermore,
Prior to the post connecting step, a worker removes the pile guide device from the ground surface while leaving the pile positioning device on the ground surface, including a guide removal step,
In the post connecting step, after the pile guide is removed from the ground surface, (a) a worker coaxially covers a portion of the pile protruding from the ground surface with a reinforcing sleeve; and further comprising the step of coaxially covering the hollow hole of the lower end of the column over the reinforcing sleeve, thereby connecting the pile and the column to each other in a triple tubular structure through the reinforcing sleeve. (33) or (35).

FIG. 1 is a front view exemplarily showing a standing signboard installed on a site with a support and a stake by using a support fixing method according to an exemplary embodiment of the present invention. FIG. 2 is a perspective view exemplifying how the signboard shown in FIG. 1 is installed in an area adjacent to a sidewalk in the site. FIG. 3 is a perspective view exemplifying the pile shown in FIGS. 1 and 2. FIG. FIG. 4 is a cross-sectional view exemplifying a fastener that fastens and fixes the pile shown in FIG. 2 to the post shown in the same figure. FIG. 5 is a post fixing system used by an operator to implement the above post fixing method, for guiding the pile shown in FIG. 2 along the vertical direction as it is driven into the ground; FIG. 4 is a perspective view illustratively showing a pile guide of 1 and a base plate for defining the horizontal position of the pile on the earth's surface; FIG. 6(a) is a side view showing a support pipe, a main horizontal pipe and a guide pipe of the pile guide shown in FIG. 5, and FIG. 6(b) is a plan view. FIG. 7 is a side view for explaining how the pile shown in FIG. 2 is guided in the vertical direction by the guide pipe and the base plate shown in FIG. 5 when the pile is driven into the ground. It is a sectional view. FIG. 8 is a process diagram exemplifying the installation work of installing the signboard shown in FIG. FIG. 9 illustrates how, as part of the topsoil preparation process shown in FIG. 8, the base plate shown in FIG. 5 is installed horizontally even though the original ground is sloping. It is a side sectional view. In FIG. 10, as the pile driving process shown in FIG. 8, the pile driving and pulling out of the ground are repeated, and after each pulling out, sand is put into the vertical hole created in the ground as a filling material. FIG. 4 is a plurality of longitudinal cross-sectional views for explaining the situation in time series; FIG. 11 is a perspective view showing an example of a pile driving hammer used by a worker to drive a pile into the ground in the pile driving process shown in FIG. FIG. 12 is a perspective view showing an example of a pile puller used by a worker to pull out a pile from the ground in the pile driving process shown in FIG. FIG. 13(a) is a side cross-sectional view for explaining the relative positional relationship between the pile, the guide pipe and the base plate in the pile driving process shown in FIG. FIG. 9 is a side cross-sectional view for explaining the relative positional relationship between the pile, the post, the reinforcing sleeve and the base plate in the post connection step shown in FIG. 8; 14 is a cross-sectional view for explaining the relative positional relationship between the pile, the support, and the reinforcing sleeve in the support connection process shown in FIG. 8. FIG. 15A and 15B are process diagrams exemplifying the removal work of removing the signboard shown in FIG. 1 by a worker. FIG. 16 is a perspective view exemplarily showing how a plurality of types of accessories are detachably attached to a billboard using one type of clamp according to another exemplary embodiment of the present invention. 17 is an enlarged plan view showing a clamp for detachably attaching the equipment shown in FIG. 16 to the signboard shown in the same figure, in a locked position and an unlocked position. 18(a) is a plan view conceptually showing the clamp shown in FIG. 17 together with a first adapter attached thereto, and FIG. 18(b) is a plan view of the same clamp together with a second adapter attached thereto. FIG. 2 is a conceptual plan view; FIG. 19(a) is a partial plane cross-sectional view showing a coaxial connection structure between a pile after driving and a post connected thereto, and FIG. 19(b) is a side cross-sectional view showing the coaxial connection structure. be.

Below, some of the more specific exemplary embodiments of the present invention will be described in detail based on the drawings.

<One embodiment>

A stanchion fastening method according to an exemplary embodiment of the invention is performed by an operator using a stanchion fastening system 10, which is described in detail below with reference to FIG. FIG. 1 is a front view showing a signboard 20 installed in a site by implementing this support fixing method together with a pair of supports 22, 22 and a pair of stakes 30, 30. FIG.

The standing signboard 20 is of a self-supporting type and a fixed installation type, and has a display board 40 as a structure supported at a position floating above the ground surface (ground surface, ground surface, support surface, etc.) by supports 22, 22.

That is, the signboard 20 consists of a pair of pillars 22, 22 fixed vertically to the ground of a site (which is an example of an area), and a display board 40 supported by being sandwiched from both sides by the pillars 22, 22. and is configured to include

Each post 22 is made of a square pipe with a side of 75 mm, while each pile 30 is made of a round bar with an outer diameter of about 50 mm. The round bar is for example solid or at least partially hollow.

The display board 40 may be horizontally long or vertically long. In the example shown in FIG. 1, the display board 30 is horizontally long. Specifically, the signboard 20 has a height dimension of about 3000 to about 4000 mm and a width dimension of about 2000 to about 3000 mm.

The signboard 20 is of a double-sided display type, so the display board 40 has a front side (front side) display surface and a rear side (rear side) display surface. The same or different information can be displayed on each of the two display surfaces.

The information is represented by, for example, characters, numbers, graphics, and the like. A number may be composed of, for example, a single number, or may be composed of a number of multiple digits.

FIG. 2 exemplarily shows how the signboard 20 is installed in the area adjacent to the sidewalk in the site where the signboard 20 is located. In this example, the signboard 20 is classified as a so-called standing signboard installed outdoors.

FIG. 3 is a perspective view showing the pile 30. FIG. This pile 30 is of course classified as a ready-made pile. This pile 30 is made of steel, for example, and is closed at a head (top or top end when driven into the ground) 50 and tip (bottom or bottom end when driven into the ground) 52 . made of hollow pipe.

The pile 30 has a total length of about 1100 to about 1600 mm and a diameter of about 50 mm. The pile 30 has a parallel portion (straight extending portion with the same cross section) 54 at its axial center, and tapered portions 56 and 58 on the front and rear of the parallel portion 54 .

<Outline description of coaxial insertion type connection structure between pile and support>

As shown in FIG. 2, each pile 30 driven into the ground is inserted with a corresponding support pillar 22 and connected coaxially and in contact with each other. This connection structure is called a "coaxial insertion type connection structure".

This coaxial insertion type connection structure can be replaced with a connection structure in which the upper end surface of each pile 30 and the lower end surface of each support 22 are butted against each other and bolted. In the insertion type connecting structure, both of the structural members have contact surfaces in the axial direction, and cross-sectional forces are transmitted to each other over a wide area.

Therefore, in the coaxial insertion type connection structure, the stress generated in the connection portion between the pile 30 and the support 22 due to the lateral load acting on the display plate 40 is distributed in the axial direction, and as a result, the stress concentration is reduced. suitable for This coaxial insertion type connection structure will be described later in detail with reference to FIG. 13(b).

FIG. 4 is a cross-sectional view showing an example of a fastener 60 that fastens and fixes the pile 30 to the post 22. As shown in FIG. In the fastener 60, a U-shaped bolt 62 is attached to the post 22 so as to partially surround the pile 30 within the post 22, and a plurality of nuts 64 are attached to the post from the outside. 22 is screwed into the portion exposed from the outer surface. A spacer 66 is appropriately interposed between the inner surface of the column 22 and the outer surface of the pile 30 within the column 22 .

<Strut fixing system>

As shown in perspective view in FIG. 5, an operator uses a stanchion securing system 10 to perform the stanchion process method. The post fixing system 10 defines a pile guide device 70 for guiding the pile 30 along the vertical direction when the pile 30 is driven into the ground by an operator, and defines the horizontal position of the pile 30 on the ground surface. and a base plate (anchor plate) 72 for.

<Pile guide tool>

Schematically, the pile guide device 70 constitutes an example of a pile guide device that guides the pile 30 so as to be vertically movable in contact with the outer peripheral surface thereof. Moreover, since the pile guide device 70 guides the portion of the pile 30 excluding the lower end portion, it is also called an "upper guide".

Specifically, the pile guide device 70 is formed by connecting a plurality of pipes crossing over each other using a plurality of orthogonal clamps (not shown) in each of the two levels so as to form a generally rectangular parallelepiped shape. Consists of The pipes have as many guide pipes 80 as there are piles 30 (two in the example shown). Each pile 30 is slidably fitted or inserted into each guide pipe 80 . Each orthogonal clamp may be obtained commercially.

The plurality of pipes has three or more support pipes 82 (in the illustrated example, four support pipes respectively arranged at four vertices of a rectangle) erected on the ground in a posture parallel to each other.

Each of the support pipes 82 has a height adjustment mechanism independently of each other. By cooperation of three or more height adjustment mechanisms for one pile guide device 70, the orientation (particularly, the direction) of the pile guide device 70 is manually adjusted three-dimensionally by the operator to adjust the guide pipe. The verticality of 80 (angle of separation .theta. of the centerline of the guide pipe 80 from the vertical direction) is adjusted to be 0 degree.

As the height adjustment mechanism, each support pipe 90 has a jack base 92, as shown in FIG. 6(a). The jack base 92 is attached to the lower end of each strut pipe 82 and grounded, a male screw 96 inserted into the strut pipe 82, a nut 98 screwed on the male screw 96, and a plurality of operating portions 100 extending radially outward from the nut 98 .

Relative rotation between base 94 and threads 96 is prevented, while relative rotation and relative axial motion between strut pipe 82 and threads 96 is permitted. Therefore, by rotating the nut 98 via the operation part 100, the operator can move the nut 98 up and down, thereby extending and contracting the entire length of each support pipe 90. FIG.

In order for the operator to visually and accurately determine whether the guide pipe 80 is oriented in the vertical direction, the guide pipe 80 or at least one other fixed relative positional relationship therewith At least one spirit level (not shown) is attached to the pipe.

As shown in FIG. 5 , the plurality of pipes further includes a plurality of main horizontal pipes 110 and a plurality of secondary horizontal pipes 112 . The main horizontal pipe 110 and the secondary horizontal pipe 112 form an overpass at right angles.

As shown in FIG. 6A, which is a side view, and FIG. , 90 sandwich the main horizontal pipe 110 from both sides so as to cross over the pipes 80, 90 at right angles.

As shown in FIGS. 6(a) and 6(b), the guide pipes 80 are connected by a plurality of orthogonal clamps (not shown) so as to cross over the main transverse pipes 110 at right angles, each orthogonal The clamps are individually switched between locked and unlocked states by the operator.

In the locked state, the guide pipe 80 is firmly (unseparably) fixed to the main horizontal pipe 110, while in the unlocked state, the operator can separate the guide pipe 80 from the main horizontal pipe 110. It becomes possible. That is, the guide pipe 80 is detachably attached to the pile guide device 70 .

<Base plate>

As shown in FIG. 5, generally, the base plate 72 constitutes an example of a pile locator for horizontally positioning the piles 30 on the ground and having through holes 74 for the piles 30 to pass through. do. In addition, the base plate 72 also constitutes an example of a pile spacing regulating tool that defines a target pile spacing at which the pair of piles 30, 30 should be separated from each other in plan view.

The base plate 72 is also referred to as the "lower guide" because it guides the lower end of the pile 30. As shown in FIG. Also, the pile guide device 70 and the base plate 72 are collectively referred to as "upper and lower guides".

The base plate 72 further joins the pair of pegs 22, 22 together in a horizontal direction such that the pegs 22, 22 are substantially prevented from moving toward or away from each other. It acts as a tie bar that mechanically restrains the piles 22, 22 (for example, integrates them from the viewpoint of material mechanics).

As a result, compared to the case where the base plate 72 is divided for each pile 22 and installed discretely, the actual value of the pile interval is promoted to continuously match the target value, and the ground becomes soft. Even if it is, each pile 22 is suppressed from tilting separately at the position on the ground surface.

Specifically, the base plate 72 is mainly composed of, for example, one straight steel plate 120 that does not deform when placed on the ground (for example, the plate thickness is about 3 mm). there is The 120 has one through-hole 74 at each end thereof, for a total of two through-holes 74 .

In the illustrated example, the base plate 72 has, in addition to the steel plate 120, two short steel plates 122 laminated and fixed to each side of the steel plate 120 at right angles to each other. Each steel plate 122 has one through-hole 74 at each end, and the base plate 72 has a total of six through-holes 74 . As a result, using the base plate 72, it is possible to drive six piles 30 into the ground at the same time with defined pile spacing from each other.

<How to install the pile guide and base plate>

In order to install the pile guide device 70 and the base plate 72 on the ground surface, first, an operator installs the base plate 72 on or near the ground surface. After that, using each through-hole 74 of the installed base plate 72 as a visual target, the operator aligns the pile guide device 70 with each guide pipe 80 and each through-hole (guide hole, positioning hole, etc.). ) 74 are aligned with each other.

<How to guide the pile during driving>

FIG. 7 is a side sectional view illustrating how the pile 30 is guided vertically by the guide pipe 80 and the base plate 72 when the pile 30 is driven into the ground.

In this embodiment, one pile 30 is slidably fitted into two guides, the base plate 72 and the guide pipe 80, at two axially different locations. be done. However, the invention may also be practiced in such a manner that a pile 30 is guided only at one axial location. This aspect may be implemented as an aspect in which only the guide pipe 80 is used, or may be implemented as an aspect in which only the base plate 72 is used.

In this embodiment, the stake 30 passes through a through-hole 74 in the base plate 72 at the same time that the guide pipe 80 passes through the same through-hole 74 . As a result, at the position of the base plate 72, for example, at or near the ground surface, the outer peripheral surface of the guide pipe 80 contacts the inner peripheral surface of the through hole 74, and at the same time, the inner peripheral surface of the same guide pipe 80 The peripheral surface contacts the outer peripheral surface of the pile 30 .

As a result, the base plate 72, the guide pipes 80 and the piles 30 are diametrically triple stacked. The structure is a triple structure consisting of the pile 30 as the innermost tube or layer, the guide pipe 80 as the intermediate tube or intermediate layer, and the base plate 72 as the outermost tube or outermost layer. As a result, the centerline of the pile 30 is prevented from being laterally displaced parallel to the centerline of the through hole 74 of the base plate 72, and the centerline of the pile 30 is prevented from shifting with respect to the centerline of the through hole 74. tilting is suppressed.

In this embodiment, the lower end of the guide pipe 80 is attached to the base plate 72 so as to prevent the lower end of the guide pipe 80 from detaching upward from the base plate 72 during driving of the pile 30 . It is made to protrude from the lower surface of and is buried in the ground. However, an initial value of about 20 mm may be sufficient for the protruding length.

<Standing signboard installation work>

FIG. 8 exemplarily shows a process diagram of an installation work in which an operator installs the signboard 20 shown in FIG.

1. Topsoil preparation process

When the installation work is started, as shown in FIG. 8, first, a topsoil preparation process is carried out as a first step. Specifically, an operator conducts a topographical survey (eg, survey of the slope of the ground surface) and a soil survey (eg, survey of the softness of the ground) in the area where the signboard 20 is scheduled to be installed on the site. conduct. After that, the worker determines the planned installation location of the signboard 20. - 特許庁

Next, when the ground surface of the portion of the ground where the signboard 20 is scheduled to be installed is not horizontal, the operator can perform the following steps as shown in FIG. ), at least the topsoil of the planned installation site, that is, the topsoil of the area including the silhouette drawn when the signboard 20 when installed is projected from directly above. Excavate, thereby creating a horizontal excavated surface or construction surface for installation of the signboard 20 .

2. Upper and lower guide installation process

Next, as shown in FIG. 8, the upper and lower guide installation process is carried out as a second step. Specifically, the worker installs a base plate 72 as a lower guide on the construction base surface, as illustrated in FIG.

After installing the base plate 72, the operator moves the two guide pipes 80, 80 of the previously installed base plate 72 relative to the two guide pipes 80, 80 of the pile guide device 70 to be installed. Using the through holes 74, 74 as visual targets, position and install the pile guides 70 on the construction surface.

13(a), the worker moves the pile guide 70 relative to the base plate 72 so that the guide pipe 80 passes through the through hole 74 of the base plate 72. to be installed on the construction base.

Furthermore, the operator adjusts the length of at least one of the four support pipes 90 of the installed pile guide 70 by operating the corresponding jack base 92, thereby The guide pipes 80 also run vertically and at the same time they run parallel to each other. As a result, as illustrated in FIG. 7, the centerline of each guide pipe 80 and the centerline of the corresponding through hole 74 are aligned with each other.

3. Piling process

Subsequently, as shown in FIG. 8, a piling process is carried out as a third step.

Specifically, the worker repeatedly drives and pulls out the pile 30 from the ground. After each extraction, the worker puts sand as a filler into the vertical hole 140 (see FIG. 7) created in the ground.

With each subsequent repeated drive, the same piling 30 compacts the sand 150 (see FIG. 7) placed in the shaft 140 and the surrounding soil outward in a stepwise manner. After the compaction is completed, the worker leaves the pile 30 in the ground with its upper end protruding from the ground surface, thereby fixing the pile 30 to the ground.

FIG. 10 shows how, as a pile-driving process, a pile is repeatedly driven into and pulled out of the ground, and sand is thrown as a filler into a vertical hole 140 created in the ground after each pull-out. FIG. 4 is a plurality of vertical cross-sectional views for explaining sequentially;

In the same figure, the transition of the ground cross section is shown for the 1st (n=1)th cycle, the nth cycle, and the final cycle among the multiple cycles that constitute one pile driving process. Shown in chronological order.

In the final cycle, the worker drives the pile 30 into the ground, and then applies rotational force, axial force, vibration (for example, sound wave), etc. to the pile 30 to remove the sand 150 and the surrounding soil. Whether or not the degree of compaction (for example, earth pressure) has reached the target value is evaluated subjectively or objectively using a sensor.

When the target degree of soil compaction is achieved, the worker leaves the pile 30 in the ground.

In each cycle, the driving of the pile 30 is performed stepwise, for example, by an operator repeatedly free-falling a piling hammer 200, for example, shown in FIG. The piling hammer 200 has, for example, a generally cylindrical weight portion 202 having a bottomed hole extending upward from the lower end, and a pair of grip portions 204 and 204 extending from the outer peripheral surface of the weight portion 202 .

As shown in FIG. 7, the total length of pile 30 is longer than the total length of guide pipe 80 . Therefore, when the pile 30 is driven into the ground to a position where the upper end of the pile 30 substantially coincides with the upper end of the guide pipe 80, the position of the upper end of the pile 30, i. approximately coincides with the position elevated to a height approximately coincident with . At this time, the tip 52 of the pile 30 driven into the ground, i.e., the pile tip depth, which is the depth of the tip, is the length of the portion from the ground surface to the ground that is the total length of the pile 30 minus the total length of the guide pipe 80. It almost coincides with the position lowered by .

The appropriate value of the pile tip depth depends on the softness of the soil into which the pile 30 is to be driven, but the pile tip depth is selected to be approximately 700 mm or more, for example, as shown in FIG. 13(b). be.

On the other hand, in each cycle, the extraction of the pile 30 is performed step by step, for example, by the operator repeatedly operating the pile extraction machine 300 shown in FIG. 12, for example.

The pile extractor 300 has, for example, a grounded base 302 , a lever 304 , and an engaging member 306 that removably engages the pile 30 . The lever 304 is swingable with a force point operated by the operator, a fulcrum supported by the base 302, and an engaging tool (for example, a metal fitting having a U-shaped grip part that matches the diameter of the pipe to be pulled out) 306. and a point of action connected to

When the operator repeatedly tilts the lever 304 toward itself, the operating force applied by the operator to the force point of the lever 304 is increased by the principle of leverage. The boosted operating force is transmitted to the stake 30 via the engaging tool 306 as a pull-out force.

When the pile extractor 300 is used to pull out the pile 30, as shown in FIG. 7, the guide pipe 80 prevents the pile extractor 300 from directly accessing the outer peripheral surface of the pile 30. Prior to this, the operator needs to temporarily pull out the guide pipe 80 from the pile 30 driven into the ground.

Therefore, the operator first unlocks the orthogonal clamps associated with the guide pipe 80 in the pile guide device 70 so that the guide pipe 80 can be separated from the pile guide device 70 . In that state, the worker pulls out the guide pipe 80 from the ground. After that, the worker mounts the pile extractor 300 on the pile 30 .

Once the pile 30 has been withdrawn, the worker puts the removed guide pipe 80 back in place on the pile guider 70 and then the next driving is done using the same guide pipe 80 .

4. Pile guide removal process

Subsequently, as shown in FIG. 8, a pile guide removal process is carried out as a fourth step. Specifically, the operator removes the pile guide tool 70 from the ground surface and collects it. At that time, the worker leaves the base plate 72 on the ground surface.

As a result, after installation of the signboard 20, the base plate 72 is a member that reinforces the pair of supports 22, 22 of the signboard 20 (for example, the pair of supports 22, 22 in the horizontal direction) on the ground surface or in the ground. It will function as a restraining tie bar).

5. Strut connecting process

After that, as shown in FIG. 8, a column connecting step is carried out as a fifth step. Specifically, after the pile 30 is fixed to the ground as described above, the worker removes the part of the pile 30 fixed to the ground that protrudes from the ground surface, as illustrated in FIG. 13(b). are used to connect each post 22 of the signboard 20 to the stake 30 coaxially and in contact with each other.

FIG. 13(b) is a side cross-sectional view for explaining the relative positional relationship between the pile 30, the post 22, the reinforcing sleeve 400 and the base plate 72 in this post connecting step. FIG. 14 is a cross-sectional view for explaining the relative positional relationship between the pile 30, the support 22, and the reinforcing sleeve 400 in this support connecting step.

Specifically, in this post connecting step, the worker first places a reinforcing sleeve 400 (in the illustrated example, it is made of a round pipe, but may possible) coaxially.

Next, the worker coaxially covers the reinforcing sleeve 400 with the hollow hole at the lower end of the post 22 (which is made of a square pipe in the illustrated example, but can also be made of a round pipe). As a result, the operator connects the pile 30 and the support 22 with each other in a triple cylindrical connection structure by using the reinforcing sleeve 400 as an interposition between the two.

At this time, as shown in FIG. 13(b), the operator inserts the reinforcing sleeve 400 so that the lower end of the reinforcing sleeve 400 penetrates the through hole 74 of the base plate 72 and is deeper therefrom, for example, about 100 to about 100 mm. Embed in the ground so that it sinks to a tip depth of 200 mm. The embedding of the reinforcing sleeve 400 may be performed by a worker hitting the upper end surface of the reinforcing sleeve 400 with a hammer.

As shown in FIG. 13(b), the reinforcing sleeve 400 is completely penetrated through the through hole 74 of the base plate 72 and embedded in the ground. Therefore, a layout is realized in which the clearance between the outer peripheral surface of the pile 30 and the inner peripheral surface of the through hole 74 of the base plate 72 is reduced. Thanks to this layout, the pile 30 and thus the support 22 are prevented from wobbling sideways in the through-hole 74, and the reinforcement sleeve 400 embedded in the ground strengthens the ground, thereby increasing the strength of the pile 30 and support. 22 posture stability is improved.

In this strut connecting step, the operator further tightens and fixes the struts 22 to the stakes 30 using fasteners 60, as illustrated in FIG. This prevents the post 22 from slipping out of the pile 30 in the axial direction. The tightening fixation by the fastener 60 is performed, for example, at at least one axial position of the strut 22 not covered by the reinforcing sleeve 400, as shown in FIG. 13(b).

By the way, prior to the execution of this strut connecting step, each strut 22 is already attached to the display board 40 together with the other struts 22 forming a pair, so that it cannot move freely by itself. There is an option of being in a completed state except for the part 30, and a state in which each support 22 is not yet attached to the display board 40, so that it can be separated from other parts and can move freely, that is, the signboard 20 is incomplete. There is an option to be in a state. This embodiment is applicable under either option.

However, in one example of the present embodiment, the former option is adopted. As a result, it is possible to carry out the work of attaching each support 22 to the display board 40 on a level ground in parallel with the work of constructing the piles 30, so that there is an advantage that work efficiency is improved.

On the other hand, in the state where the signboard 20 is completed in its main body, the pair of posts 22, 22 of which the relative position is fixed is attached to a pair of stakes 30, 30 driven into the ground. It is also necessary to connect to those whose relative positions are fixed. Therefore, a substantially perfect geometric match is required between the respective centerlines of the pair of struts 22, 22 and the respective centerlines of the pair of piles 30,30.

Here, "geometrically almost perfect match" means that the pair of struts 22, 22 are almost completely parallel to each other, and that the pair of piles 30, 30 are almost completely parallel to each other. , the spacing between the pair of pillars 22 and 22 and the spacing between the pair of piles 30 and 30 are almost completely matched with each other.

Thus, in order to meet the requirement for nearly perfect geometric matching between the pair of stanchions 22, 22 and the pair of piles 30, 30, in the present embodiment, the actual orientation of each pile 30 is targeted. Pile guides 70 are used together to adjust the orientation of the upper portion of each pile 30 and a base plate 72 to adjust the orientation of the lower portion of each pile 30 in order to precisely match that of .

6. Topsoil backfill process

After that, as shown in FIG. 8, the topsoil backfilling process is carried out as the sixth step. Specifically, the worker buries the base plate 72 in the ground by mounding it, as illustrated in FIG. 13(b). If the original ground surface is an inclined surface, the first excavated portion is backfilled and restored by filling up the base plate 72 in accordance with the original ground surface.

As described above, a single signboard installation work is a simple manual work performed by workers without using heavy machinery, without excavating the ground, and neither advanced techniques nor many years of experience are required. to end.

<Standing signboard removal work>

FIG. 15 exemplarily shows a process diagram of the removal work in which the worker removes the signboard 20 after use.

<1. Dismantling process>

First, as shown in the figure, a dismantling process is carried out as a first step. Specifically, the operator separates each post 22 from the pile 30 to which it is connected by loosening the fasteners 60 . As a result, the pair of piles 30 , 30 protrude from the ground while being covered by their respective reinforcing sleeves 400 .

<2. Stake extraction process>

Next, as shown in the figure, a pile extraction process is carried out as a second step.

Specifically, first, an operator manually removes each reinforcing sleeve 400 from each pile 30 by using a first pile extractor 300 having an engaging tool 306 that matches the diameter of the reinforcing sleeve 400. Pull out.

Subsequently, the operator uses a second pile extractor 300 (which may be the same one used in the pile driving process during the installation operation described above) having an engaging tool 306 that matches the diameter of the pile 30 . ) to manually pull each stake 30 out of the ground. As a result, the pair of vertical holes 140, 140 formed by the pair of piles 30, 30 remain in the ground.

<3. Base plate removal process>

After that, as shown in the figure, the base plate removing process is carried out as the third step. Specifically, first, the worker removes the soil covering the buried base plate 72, so that the base plate 72 is exposed. The operator then removes the base plate 72 from the ground and retrieves it.

<4. Topsoil Restoration Process>

Subsequently, as shown in the figure, a topsoil restoration process is carried out as a fourth step. Specifically, the worker appropriately fills up a portion of the site where the topsoil has not been leveled due to the removal of the winning signboard 20, thereby backfilling and leveling the site.

As described above, a single signboard removal work does not require heavy machinery, does not require excavation of the ground, is performed simply by hand, and does not require advanced techniques or years of experience. to end.

In this embodiment, in the pile driving process shown in FIG. 8, the driving and pulling out of the piles 30 and the throwing of sand are repeatedly performed. If not, the pile 30 may be driven only once and the injection of sand into the vertical hole 140 may be omitted.

However, even in this case, if the pile guide device 70 and the base plate 72 are used and/or the above-described triple cylindrical connection structure is used between the pile 30 and the support 22, the support can be The effect is obtained that the certainty of assembly of 22 (pile interval and verticality/parallelism) is ensured and/or the connection strength (for example, bending rigidity) of support 22 is ensured.

As described above, the scenario in which the posts 22, 22 of the signboard 20 are fixed to the ground of the site (for example, used as a parking lot) by the unique driving pile construction method according to the present embodiment has been exemplified. In the construction method, on a similar site, other facilities used together with the signboard 20, such as box-shaped bodies such as ticket vending machines, ticket issuing machines, and fare adjustment machines, and posts to which equipment such as security lights are attached (for example, It can be used to install hollow cylinders).

For example, when installing a ticket vending machine having a hollow box-shaped frame (for example, a hollow box-shaped body) on the site, one or more piles 30 driven into the ground by the same pile construction method are installed as described above. It is inserted through the center hole of the bottom plate portion of the box-shaped frame, thereby firmly connecting the ticket vending machine to the pile 30 .

<Superiority of the driving pile construction method according to the present embodiment over the root winding pile construction method>

1. The advantage of shortening the construction period

The applicant conducted a test construction of installing one signboard 20, one ticket vending machine, and five crime prevention lights on the same site. The time spent to construct the multiple piles 30 using the driven pile construction method was approximately 4 hours.

On the other hand, a plurality of posts 22 (a pair of posts for the vertical signboard 20, a plurality of posts for the ticket vending machine, and a plurality of posts for the security lights) are prepared using the above-described root winding pile construction method. ), the worker performs the following steps in order, for example.

(1) The process of excavating the same number of pilot holes as the number of posts 22 in the ground

(2) preparing ready-mixed concrete (or mortar) for all struts 22;

(3) A step of inserting all of the supports 22 into their respective pilot holes and installing them on the site (however, the pair of supports 22, 22 for the signboard 20 is in a state in which both are attached to the display board 30, i.e., erected). The completed signboard 20 is inserted into each pilot hole and installed on the site.)

(4) A step of charging the prepared ready-mixed concrete into a plurality of pilot holes

(5) the step of aligning the erected signboard 20 so that its lateral direction almost completely coincides with its horizontal direction;

(6) The lower ends of the pillars 22 (for example, the portions protruding from the ground surface) are designed to prevent the pillars 22 from unexpectedly tilting or overturning before the ready-mixed concrete is completely solidified in each prepared hole. ) to install reinforcing diagonals (brace)

(7) A step of waiting until the ready-mixed concrete solidifies

As a comparative test for the test construction, the applicant used the root winding pile construction method to drive the same number of pillars 22 into the ground as the plurality of piles 30 in the case of the test construction. spent.

As is obvious from the above description, according to the present embodiment, it is possible to complete the construction of the pile 30 in a significantly shorter time than when using the root winding pile construction method, and the construction period required for pile construction is shortened. , along with that, the construction cost required for pile construction is also reduced.

Furthermore, according to the present embodiment, although it is normal that a plurality of piles 30 are constructed in sequence rather than all at once, when the construction of a certain pile 30 is completed in several hours, another work related to that pile 30 is performed. can be performed by another operator. As a result, according to the present embodiment, construction of another pile 30 can be performed concurrently with work related to a certain completed pile 30 . Here, the “other work” includes, for example, electrical work performed on the signboard 20 . The electrical work includes the work of attaching a signboard light for nighttime lighting to the upper part of the signboard 20, wiring work for supplying power to the signboard light, and the like.

Therefore, according to the present embodiment, it is possible to perform at least partially concurrently a plurality of types of necessary work on the same site, thereby improving work efficiency as a whole.

On the other hand, in the case of using the root-wrapped pile construction method, it is not possible to carry out associated work (for example, necessary electrical work, etc.) on any of the pillars 22 until the concrete of all the pillars 22 has solidified. . Therefore, the completion of the concrete foundations for all the pillars 22 is waited for before the work associated with those pillars 22 is started as serial work rather than as parallel work.

As a result, when the root winding pile construction method is used, it is possible to perform a plurality of types of work only with significantly lower efficiency than the work efficiency in this embodiment.

2. The advantage of reduced underground installation space for piles

As is clear from the above description, in this embodiment, the piles 30 are driven into the ground prior to fixing the support columns 22 to the ground. , a shaft 140 is created in the ground having a diameter approximately the same as the diameter of the pile 30 .

By the way, according to the above-mentioned root winding pile construction method, a pilot hole is excavated in the ground prior to embedding the post in the ground. The pilot hole is drilled to have a cross-section larger than the outside diameter of the stanchion, allowing for the size of the concrete foundation that will surround the lower end of the stanchion when the stanchion is embedded in the pilot hole. .

Furthermore, according to this root winding pile construction method, as described above, before the concrete foundation is solidified, the above-described reinforcing diagonal members are projected laterally from the lower ends of the respective pillars. Because it is attached to the ground, extra space is required on the ground that is occupied by the reinforcing diagonals.

Therefore, when adopting this root winding pile construction method, when installing piles on the site near the boundary line with the adjacent land, the pilot hole, concrete foundation, and diagonal reinforcement for reinforcement must be placed in the adjacent land. It is necessary to evacuate the support from the boundary line to the side of the site so as not to enter. Therefore, when adopting this root pile construction method, it is difficult to minimize the possibility that the poles will become an obstacle on the site by installing the poles close to the boundary line on the site. is.

On the other hand, according to the present embodiment, the vertical hole 140 is formed in the ground at the same position as the pile 30 and has approximately the same diameter. Since the depth of each pile 30 is so deep that no diagonal material is required (e.g., 700 mm, 800 mm, or 900 mm or more), the piles 30 and the pillars 22 connected to them are placed close to the boundary line on the site. becomes easier.

In the embodiment described above, the column 22 and the pile 30 are coaxially connected to each other in a triple tube structure via the reinforcing sleeve 400 as the third member or intermediate member.

On the other hand, in a modified example, as illustrated in FIGS. 19(a) and 19(b), the pile 30 and the post 22 are coaxially arranged in a double tubular structure without using a third member or an intermediate member. are connected to each other.

3(a) is a partial cross-sectional plan view showing the coaxial connection structure between the pile 30 after driving and the post 22 connected thereto, and FIG. 3(b) is a side cross-sectional view showing the coaxial connection structure. It is a diagram.

The coaxial coupling structure has a plurality of guide plates 600 fixed axially and discretely within the central hole 22b of the lower end 22a of the post 22. As shown in FIG. The number may be two, as shown, or may be greater, such as three or four.

At the lower end 22a of the support 22 (the portion of the support 22 that is connected to the upper end of the pile 30), the greater the number of guide plates 600 per predetermined axial length (the higher the density), the higher the number of guide plates 600. The load acting on the connection point between the post 22 and the pile 30 via the plate 600 is reduced. Therefore, the higher the density of the guide plate 600, the more widely the load is distributed in the axial direction in the connection between the support 22 and the pile 30, and the stress is distributed over a wide range without being locally concentrated. As a result, stress concentration is relieved.

Each guide plate 600 generally has a plate shape, and in one example, has an external shape smaller than the cross-sectional shape of the central hole 22b (for example, the guide plate 600 can pass through the central hole 22b in a predetermined posture). and a mounting portion 604 bent at one end of the support portion 602 . The support portion 602 and mounting portion 604 may be configured as an integral component or as separate components.

The support portion 602 has through holes 603 through which the stakes 30 pass, thereby fixing the radial position of the stakes 300 .

On the other hand, the mounting portion 604 is mounted at a predetermined axial position of the central hole 22b. The attachment is performed by, for example, screwing or welding to the side wall of the column 22 .

Furthermore, the attachment portion 604 uses a fastener 610 such as a set screw (a male screw for fixing the mating member by pressing its tip against the mating member) to attach the post 22 and the pile 30 in a predetermined axial direction. used to fasten to

The fastener 610 is a female thread formed in the side wall of the support 22 (in this case, a through hole is formed in the mounting portion 604), or an internal thread formed in the mounting portion 604 (in this case, a thread of the support 22). a through hole is formed in the side wall). In its threaded condition, fastener 610 engages the outer surface of stake 30 at its tip. The engagement presses the stake 30 against the peripheral surface of the through hole 603 of the guide plate 600 . The compression positions the post 22 both axially and radially with respect to the pile 30 and prevents the post 22 from axially disengaging from the pile 30 .

In the case of adopting this coaxial connection structure, the post connection step is performed, for example, after the pile guide device 70 is removed from the ground surface, (a) the worker attaches the support 22 to the part of the pile 30 protruding from the ground surface. (b) fixing, joining or fastening the lower end 22a to the protruding portion. By doing so, the pile 30 and the strut 22 are coaxially connected to each other in a double tubular structure.

<Another embodiment>

16-18, a billboard in accordance with another exemplary embodiment of the present invention will now be described. However, elements common to the previous embodiment are referred to using the same reference numerals or names to omit redundant description, and only different elements will be described in detail.

As shown in FIG. 1, the signboard 20 has a pair of supports 22, 22, and in one example, each support 22 is configured as a square pipe.

By the way, when the signboard 20 is used as a signboard for a parking lot, for example, an electric light (for example, a crime prevention light) for illuminating the display board 30 of the signboard 20 at night, or an electric light for illuminating the site day and night. A monitoring camera for photographing and monitoring the parking lot is detachably attached to a high position of the support 22, for example, near the upper end thereof.

As illustrated in FIG. 16, in order to detachably attach equipments 520, 522 such as lights (for example, security lights) and surveillance cameras to the post 22, for example, a commercially available product (standard product) as described above is used. A clamp 500, such as an orthogonal clamp, is used. This clamp 500 is known as a fitting that straddles two parts, a fitting that fastens and fixes two parts, and the like.

In the figure, a perspective view is shown as an example of how a plurality of types of accessories 520 and 522 are detachably attached to the signboard 20 using one type of clamp 500 .

FIG. 17 is an enlarged plan view of the clamp 500 detachably attached to the support 22 made of a square pipe, showing the locked position and the unlocked position. The illustrated example is a parallel clamp (or universal clamp) that clamps two pipes parallel to each other, but as illustrated in FIGS. It is also possible to employ orthogonal clamps (or fixed clamps) that

As shown in FIG. 17, regardless of the type, the clamp 500 includes a first holding portion 504 for detachably holding a first pipe 502 (for example, a post 22 made of a square pipe) and a second holding portion 504 . for detachably holding the pipe 506 (for example, the round pipe 506 of the adapters 530, 532 (described in detail later with reference to FIG. 18) used to attach the equipment 520, 522) and a second holding portion 508 . The holding portions 504 and 508 are connected by a connecting portion 510 so that they cannot be relatively displaced in the case of a fixed clamp, and are connected so as to be relatively displaceable in the case of a universal clamp.

The first holding portion 504 has a locked position indicated by a chain double-dashed line in the same figure, that is, a position where the first pipe 502 is fixed to the clamp 500, and an unlocked position indicated by a solid line in the same figure, that is, the first pipe 502 is clamped. 500 to the releasable position.

Similarly, the second holding portion 508 also has a locked position indicated by a two-dot chain line in FIG. 506 switches to a releasable position from clamp 500 .

FIG. 18(a) is a plan view conceptually showing a clamp 500 with a first adapter 530 attached thereto, and FIG. 18(b) shows the same clamp 500 with a second adapter 532 attached thereto. FIG. 2 is a conceptual plan view;

In this embodiment, to attach the fittings 520, 522 to the first pipe 502 by the clamp 500, first and second clamps manufactured to the geometrical characteristics of the fittings 520, 522, respectively. Adapters 530, 532 are used. Specifically, a first adapter 530 is used to attach a first fitment 520 to the clamp 500, while a second adapter 532 is used to attach a second fitment 522 to the same clamp 500. is used.

Both adapters 530 and 532 are configured as a two-part structure. and a second pipe 506 as a retained second portion.

The attachment 550 is dedicated to the fixtures 520, 522 to be attached, at least in terms of mounting specifications (for example, the number and arrangement of screw holes), while the second pipe 506 is adapted to the type of clamp 500 to which it corresponds. It corresponds to one to one and is a common item for the accessories 520 and 522 to be mounted. Typically, the attachment 550 and the second pipe 506 are manufactured separately and then joined together to form one complete adapter 530,532.

When the mounting bracket 540 and the attachment 550 are screwed together, the mounting bracket 540 and the attachment 550 are formed with the same number of threaded holes 560 and 562 in the same arrangement (eg, pitch and orientation). However, the mounting specifications of the mounting bracket 540 (the number and arrangement of the screw holes 560) are different when the types of the accessories 520, 522 are different.

Therefore, adapters 530 and 532 exist for each type of accessories 520 and 522 (types of mounting specifications). However, in the adapters 530, 532, the second pipe 506 is common regardless of the type of the equipment 520, 522, whereas the attachment 550 is the type of the equipment 520, 522 (type of mounting specification). ).

Therefore, the adapters 530, 532, regardless of their type, are common to each other with respect to the second pipe 506, so that only one type of clamp 500 is required. On the other hand, the adapters 530 and 532 are dedicated to the individual equipment 520 and 522 because the attachment 550 differs depending on the type of the equipment 520 and 522 .

By the way, conventionally, in order to install the equipment 520, 522 at a high place in the column 22 at a site (for example, a parking lot), during the work at a high place, the installation specification of the equipment 520, 522 At the same time, the wall surface of the support 22 was sometimes drilled.

On the other hand, according to this embodiment, the same drilling work is performed by the same worker who goes to the mounting site or the mounting site at the manufacturing site such as a factory before carrying it out to the site. Another worker who cannot go there can perform the drilling work on the attachment 550 as work on flat ground or in a low place. Therefore, according to the present embodiment, it is no longer essential to perform the drilling work at a high place, so the burden on the worker is reduced.

Furthermore, according to this embodiment, the multiple types of accessories 520 and 522 are not directly attached to the clamp 500 but indirectly attached to the clamp 500 via corresponding adapters 530 and 532 . Therefore, according to this embodiment, regardless of the types of accessories 520 and 522 to be attached, the type of clamp 500 is unified into one type as long as the type of support 22 is the same. As a result, storage and management of clamp 500 is facilitated prior to use.

That is, according to this embodiment, the interchangeability or versatility of the clamp 500 with respect to the types of fittings 520,522 is enhanced thanks to the intervening adapters 530,532.

Furthermore, according to the present embodiment, another authorized clamp 500 is replaced at the same site because the clamp 500 that arrived at the site was not a genuine product and does not fit the equipment 520, 522 that arrived at the site along with it. This eliminates the extra trouble of carrying out to

As is clear from the above description, in this embodiment, an operator uses a commercially available clamp (for example, a two-member connection type) to attach a first object (for example, the support 22) to a second object (for example, In order to solve the problem of reducing the burden on the worker due to the increase in the types of second objects that may be attached to the first object of the same type in the work of attaching accessories 520, 522). It was made to

In order to solve the problem, according to this embodiment, the following technical idea is adopted.

(a) A first technique of using a commercially available or standardized clamp to attach a second object (e.g., fittings 520, 522) to a first object (e.g., post 22). and (b) having the clamp indirectly grip a second object via an adapter, the adapter comprising a first portion attached to the second object and a second portion gripped by the clamp. and the first part is fabricated to have different geometries depending on the type of the second object, whereas the second part has only one clamp type. Based on the second technical idea of manufacturing with a unique geometry, an adapter-mediated object mounting method or a clamping adapter is adopted as a means for solving the problem.

According to the present embodiment, as is self-evident from the above description, the operator can use only one type of clamp at any of a plurality of worksites to clamp one type of first object to any type of clamp. It is possible to detachably attach the second object (e.g., high-altitude work), and the accompanying work (e.g., storing and managing the clamp) is simplified. be done.

In this embodiment, an "adapter" is interposed between the clamp and the second object, as illustrated above, but instead, an "adapter" is interposed between the clamp and the first object. May be interposed or embodied as a combination of a first adapter interposed between the clamp and the first object and a second adapter interposed between the clamp and the second object may be

For example, Japanese Patent Laid-Open No. 2017-127272 relates to a clamp as a tool for connecting a plurality of members to each other so as to form an overpass.

Although some of the exemplary embodiments of the present invention have been described in detail above with reference to the drawings, these are examples, and a person skilled in the art can It is possible to implement the present invention in other forms with various modifications and improvements based on knowledge.

Claims (7)

Instead of using a concrete foundation, an operator hammers at least one pile having a generally circular cross-section, a straight portion and a pointed lower end into the ground to use the pile as a foundation. A method of securing at least one post to the ground using
The pile is repeatedly driven into and pulled out of the original ground in which no pilot hole has been excavated in advance , and each time the pile is driven, a vertical hole is formed in the ground by itself, and the vertical hole that appears each time is pulled out . Sand is put into the pit as a filling material, and by each subsequent repeated driving, the same pile gradually spreads the sand put into the vertical hole and the surrounding soil outward and compacts it. a piling step of leaving the pile in the ground with its upper end protruding from the ground surface upon completion of compaction, thereby fixing the pile to the ground;
and a post connection step of coaxially connecting the post to the pile using a portion of the pile fixed to the ground that protrudes from the ground surface after the pile is fixed to the ground. A method in which an operator manually drives at least one pile into the ground instead of using a concrete foundation and uses the pile as a foundation to fix at least one post to the ground,
The piles are repeatedly driven into and pulled out of the ground, and after each pull-out, sand is put into the vertical hole created in the ground as a filling material. , the sand thrown into the vertical hole and the surrounding soil are compacted while gradually spreading outward, and when the compaction is completed, the pile is inserted into the ground with its upper end protruding from the ground surface. a piling step of placing and thereby fixing the pile to the ground;
A post connection step of coaxially connecting the post to the pile using a portion of the pile fixed to the ground that protrudes from the ground surface after the pile is fixed to the ground;
Prior to the first driving, a worker uses a pile guide tool for guiding the pile so that it can move up and down while it is in contact with the outer peripheral surface of the pile, and a pile positioning tool for positioning the pile on the ground surface in the horizontal direction. A guide installation process of installing a thing having a through hole for the pile to penetrate
Stanchion method including . The pile guide device includes a guide pipe in which the pile is axially slidably fitted,
3. The post fixing method according to claim 2, wherein said guide installation step includes a step of installing said pile guide relative to said pile positioning device so that said guide pipe passes through said through hole. In the guide installation step, after the pile positioning device is installed on or near the ground surface, an operator uses the through hole of the installed pile positioning device as a visual target to guide the pile guide device. 4. The strut fixing method according to claim 2 or 3, comprising the step of positioning the . The pile guide tool is
a guide pipe to which the pile is axially slidably fitted;
an orientation adjustment mechanism for adjusting the orientation of the guide pipe;
5. The step of installing the guide includes a step of adjusting the orientation of the pile guide by an operator using the orientation adjustment mechanism so that the guide pipe extends vertically. The strut fixing method described in . moreover,
Prior to the post connecting step, a worker removes the pile guide device from the ground surface while leaving the pile positioning device on the ground surface, including a guide removal step,
In the post connecting step, after the pile guide is removed from the ground surface, (a) a worker coaxially covers a portion of the pile protruding from the ground surface with a reinforcing sleeve; and further comprising the step of coaxially covering the hollow hole of the lower end of the column over the reinforcing sleeve, thereby connecting the pile and the column to each other in a triple tubular structure through the reinforcing sleeve. The strut fixing method according to claim 3 or 5. 7. Any one of claims 1 to 6, wherein said at least one post is used for posting information displaying structures including signboards, information boards or signs, or for fixing protective fences. Post fixing method as described.

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