JP5968667B2 - Construction method of lightweight building foundation - Google Patents

Description

  The present invention relates to a technique for connecting and supporting a pillar of a lightweight building structure to a pile tip of a steel pipe pile submerged in the ground, and in particular, a lightweight building even if the center axis of the submerged steel pipe pile is misaligned. The steel pipe pile can be supported by connecting the central axis of the column of the structure to the pile tip of the steel pipe pile at the planned installation position, and even if the cutting plane of the pile tip of the steel pipe pile is inclined, the column of the lightweight building structure is not inclined. Of course, the present invention relates to a construction method for a lightweight building foundation that can be connected to and supported by the tip of the pile, as well as a relatively simple construction method.

  As a construction method for building foundations, there is JP-A-11-181790 (Patent No. 3095376). This construction method consists of cutting a steel pipe pile set in the ground to a desired length, fitting a pile head cap fitted with a bolt in the center to the pile tip, and using a pile-side pile base plate with a through hole. After the tip is sandwiched, it is welded to the tip of the pile, the column base plate with the column installed is placed on the bolt, and temporary bolts are inserted into the anchor holes and through holes drilled in the column side base plate to match the through holes. After positioning the pillar by inserting a sandwich plate between both base plates, a temporary bolt is sandwiched by a sandwich plate with a groove notched, and both base plates are fastened by a high strength bolt after removing the temporary bolt. .

However, when a steel pipe pile is set in the ground, it is almost impossible to accurately set the center of the steel pipe pile at a predetermined position without causing misalignment, and the central axis of the set steel pipe pile and the building structure There is a misalignment of about several centimeters between the center axis of the column and the invention disclosed in Japanese Patent Laid-Open No. 11-181790 does not take measures against this misalignment.
Moreover, it is difficult to cut the pile tip of the steel pipe pile accurately and horizontally, and it is therefore difficult to attach the pile side base plate welded to the cut pile tip horizontally. Therefore, in the invention of the above-mentioned JP-A-11-181790, in order to horizontally attach the column side base plate to the slightly inclined pile side base plate, an appropriate number of thin sandwich plates are sandwiched between the base plates. Although it is adjusted, it is considered difficult to finely adjust the tilt of 1 mm or less in the field work. On the other hand, even if it is a slight inclination, if the building structure is high, the horizontal shift at a high position appears greatly, and its influence cannot be ignored.

  Therefore, the applicant of the present application can connect and support the central axis of the pillar of the building structure to the tip of the steel pipe pile at the planned installation position even if the center axis of the submerged steel pipe pile is misaligned. Invented a building foundation construction method and a building foundation construction joint board that can be connected and supported to the pile tip of a steel pipe pile without tilting the pillar of the building structure even if the cutting plane of the pile tip is inclined with respect to the horizontal plane. Have been filed (JP 2010-168810, JP 2010-255329).

JP-A-11-181790 (Japanese Patent No. 3095376) JP 2010-168810 A JP 2010-255329 (Patent No. 4427603)

By the way, in the said invention of JP2010-168810A and JP2010-255329A, it considers that the load of 100-200 tons acts on one steel pipe pile. For this reason, the building foundation construction board used for this is required to have a structure that can sufficiently withstand the load of 100 to 200 tons. As a result, the structure is heavy and sturdy, and the installation method for installing it is also a major factor for the safe and reliable construction of heavy and sturdy building foundation construction boards. I didn't get it.
On the other hand, in some constructions of building foundations, there is one in which a light weight load of about 1/5 to 1/10 is applied to one steel pipe pile. In this case, in order to apply the invention of JP2010-168810A or JP2010-255329A as it is, it becomes too strong and is useless, and the construction of the lightweight building foundation requires labor and cost. There was a problem of the above.

  The present invention has been devised in view of the problems as described above to solve the problems. The object of the present invention is to reduce the weight even if the center axis of the steel pipe pile that has been laid is misaligned. The central axis of the pillar of the building structure can be connected to and supported by the pile tip of the steel pipe pile at the planned installation position, and the column of the lightweight building structure can be tilted even if the cutting plane of the pile tip of the steel pipe pile is inclined with respect to the horizontal plane. The object of the present invention is to provide a construction method of a lightweight building foundation which can be connected and supported to the pile tip of the steel pipe pile without any problem, and which can be performed by a relatively simple construction method.

In order to achieve the above-mentioned problems, the invention of claim 1 cuts a steel pipe pile set in the ground at a desired length, and holds the mounting hole drilled in the center of the support plate at the tip of the pile of the steel pipe pile. In this state, the inner periphery of the mounting hole of the support plate and the pile tip are welded to fix the pile tip without protruding from the mounting hole , and a plurality of screws on the upper surface are formed on the surface of the support plate wider than the pile tip. The upper end of the support projection at the center of the upper surface of the adjustment connecting plate in which the rod is implanted is aligned with the center axis of the column of the light building structure at the planned installation position, and each screw rod of the adjustment connecting plate is attached to the light building structure. The adjustment connecting plate is fixed while moving and adjusted so as to match each screw rod hole formed in the base plate fixed to the lower end of the column, and each lower portion is attached to each screw rod installed on the upper surface of the adjustment connecting plate. The imaginary plane that connects the upper surfaces of the lower clamps to the clamps is a horizontal plane with a predetermined height. After screwing in while adjusting, the base plate is lowered, the screw rods are inserted into the screw rod holes of the base plate, the lower surface of the base plate is in contact with the upper surface of each lower clamp, and then each screw rod The upper fastening bracket is screwed and tightened, and each column of the lightweight building structure is connected and supported to the pile tip of each steel pipe pile via the construction joint board composed of the support plate and the adjustment connecting plate. It consists of means.

Moreover, in order to achieve the above-mentioned subject, the invention of claim 2 cuts the steel pipe pile set in the ground at a desired length, and displaces a stopper stopper piece on the upper side of the outer peripheral side of the pile tip side of the steel pipe pile. Attach and hold the mounting hole drilled in the center of the support plate at the tip of the pile of the steel pipe pile with the stopper stopper piece supporting the outer peripheral lower surface of the mounting hole of the support plate. The inner periphery and the tip of the pile are welded to fix the tip of the pile without protruding from the mounting hole, and the adjustment connecting plate having a plurality of screw rods installed on the upper surface on the surface of the support plate wider than the tip of the pile. The base plate fixed to the lower end of the column of the lightweight building structure so that the upper end of the support projection at the center of the upper surface coincides with the central axis of the column of the lightweight building structure at the planned installation position. While moving and adjusting the adjustment connecting plate so as to match each formed screw rod hole Then, screw each screw rod planted on the upper surface of the adjustment coupling plate with a fine adjustment so that the virtual plane connecting the upper surface of each lower clamp is a horizontal surface of a predetermined height. The base plate is lowered, the screw rods are inserted into the screw rod holes of the base plate, the lower surface of the base plate is brought into contact with the upper surface of the lower tightening bracket, and then the upper tightening is performed on each screw rod. Consists of means for screwing and tightening metal fittings to connect and support each pillar of a lightweight building structure to the pile tip of each steel pipe pile via a construction joint board composed of the above support plate and adjustment connection plate It is.

In order to achieve the above-described problems, the invention of claim 3 cuts a steel pipe pile set in the ground to a desired length, and surrounds the soil of the surrounding ground on the surface of the outer periphery of the pile tip side of the steel pipe pile. Scraping up and building a foundation with soil, supporting the outer peripheral lower surface of the mounting hole of the support plate with the base of the soil, and holding the mounting hole drilled in the center of the support plate at the pile tip of the steel pipe pile Then, the inner periphery of the mounting hole of the support plate and the pile tip are welded to fix the pile tip without projecting from the mounting hole , and a plurality of screw rods are provided on the upper surface of the support plate wider than the pile tip. The upper end of the support projection at the center of the upper surface of the installed adjustment connecting plate is aligned with the central axis of the light building structure column at the planned installation position, and each screw rod of the adjustment connecting plate is placed on the light building structure column. Move and adjust the adjustment connecting plate to match each screw rod hole formed in the base plate fixed to the lower end While fixing it, finely adjust the lower flattening bracket to each screw rod planted on the upper surface of the adjustment connecting plate so that the virtual plane connecting the upper surface of each lower tightening bracket becomes a horizontal plane of a predetermined height. The base plate is lowered, the screw rods are inserted into the screw rod holes of the base plate, the lower surface of the base plate is in contact with the upper surface of each lower clamp, and then the upper screws are tightened on the screw rods. It consists of means for screwing and tightening the metal fittings, and connecting and supporting each column of the lightweight building structure to the pile tip of each steel pipe pile via the construction joint board composed of the support plate and the adjustment connecting plate. Is.

Moreover, in order to achieve the above-mentioned subject, the invention of claim 4 cuts the steel pipe pile set | placed in the ground by desired length, and has several spacers on the surface of the outer periphery of the pile tip side of a steel pipe pile. The mounting hole of the support plate is placed in a state where the outer peripheral lower surface of the mounting hole of the support plate is supported by the plurality of spacers, and the mounting hole drilled in the center of the support plate is held at the pile tip of the steel pipe pile. An adjustment coupling plate in which the inner periphery of the pile and the pile tip are welded to fix the pile tip without protruding from the mounting hole , and a plurality of screw rods are implanted on the upper surface of the support plate wider than the pile tip. A base plate in which the upper end of the support projection at the center of the upper surface of the base plate is aligned with the central axis of the column of the light building structure at the planned installation position, and each screw rod of the adjustment connecting plate is fixed to the lower end of the column of the light building structure The adjustment connecting plate is fixed while moving and adjusting so as to match each screw rod hole formed in Each lower clamp is screwed onto each screw rod planted on the upper surface of the connecting plate while finely adjusting the virtual plane connecting the upper surfaces of the lower clamps to a horizontal plane of a predetermined height. Lower the base plate, insert each screw rod into each screw rod hole of the base plate, and touch the lower surface of the base plate to the upper surface of each lower clamp, then screw the upper clamp to each screw rod Then, it is composed of means for fastening and supporting each column of the lightweight building structure to the pile tip of each steel pipe pile via a construction joint board composed of the support plate and the adjustment connecting plate.

In order to achieve the above-mentioned problems, the invention of claim 5 cuts a steel pipe pile set in the ground to a desired length, and attaches an opening locking lid to a mounting hole drilled in the center of the support plate. The support plate is supported by supporting a support plate by placing a part of the lower surface of the opening locking lid on the pile tip of the steel pipe pile and holding the mounting hole of the support plate on the pile tip of the steel pipe pile. The inner periphery of the mounting hole and the tip of the pile were welded to fix the tip of the pile without protruding from the mounting hole , and a plurality of screw rods were planted on the upper surface of the support plate wider than the tip of the pile The upper end of the support protrusion at the center of the upper surface of the adjustment connecting plate is fixed to the lower end of the column of the lightweight building structure so that the upper end of the support projection coincides with the center axis of the column of the lightweight building structure at the planned installation position. The adjustment connecting plate is fixed while moving and adjusting so that it matches the screw rod holes formed on the base plate. Each lower clamp is screwed onto each screw rod planted on the upper surface of the plate while finely adjusting the virtual plane connecting the upper surfaces of the lower clamps to a horizontal plane with a predetermined height. Lower the plate and insert each screw rod into each screw rod hole of the base plate. After the lower surface of the base plate is in contact with the upper surface of each lower clamp, the upper clamp is screwed onto each screw rod. And a means for connecting and supporting each column of the lightweight building structure to the pile tip of each steel pipe pile via the joint plate for construction composed of the support plate and the adjustment connecting plate.

Further, in order to achieve the above-mentioned problems, the invention of claim 6 cuts a steel pipe pile set in the ground at a desired length, and an operator holds the support plate by hand and drills it in the center of the support plate. With the mounting hole held at the pile tip of the steel pipe pile, the inner circumference of the mounting hole of the support plate and the pile tip are welded to fix the pile tip without protruding from the mounting hole. The upper end of the support projection at the center of the upper surface of the adjustment connecting plate in which a plurality of screw rods are implanted on the upper surface on the surface of the wide support plate so as to coincide with the central axis of the column of the lightweight building structure at the planned installation position The adjustment connecting plate is fixed by moving and adjusting the adjustment connecting plate so as to match each screw rod hole formed in the base plate fixed to the lower end of the column of the lightweight building structure. Virtually tie each lower clamp to the top of each lower clamp on each screw rod planted on the top The base plate is lowered so that the surface becomes a horizontal surface of a predetermined height, the base plate is lowered, the screw rods are inserted into the screw rod holes of the base plate, and the lower surface of the base plate is tightened to the lower part. After contacting the upper surface of the bracket, the upper clamp is screwed onto each screw rod and tightened, and each column of the lightweight building structure is composed of the above support plate and adjustment connecting plate at the pile tip of each steel pipe pile It consists of a means to carry out connection support through the joint board for construction to be performed.

  According to the construction method of the lightweight building foundation according to the invention of claim 1 to claim 6 comprising means for solving the problem, the lightweight building structure even if the center axis of the subsidized steel pipe pile is misaligned. The center axis of the steel column can be connected to and supported by the pile tip of the steel pipe pile at the planned installation position, and the steel pipe pile without tilting the column of the lightweight building structure even if the cutting plane of the pile tip of the steel pipe pile is inclined with respect to the horizontal plane Of course, it can be connected to and supported by the pile tip, and this can be done by a relatively simple construction method, so that the work efficiency can be increased accordingly. In this way, it is possible to prevent an extra effort and cost.

  In addition, in the invention of claim 2, in addition to the above-described effect, the mounting hole formed in the center of the support plate can be provided by attaching a stopper stopper piece to the outer peripheral side surface on the pile tip side of the steel pipe pile. While welding the inner periphery and the pile tip, the mounting hole of the support plate can be easily and easily held on the pile tip of the steel pipe pile.

  In addition, in the invention of claim 3, in addition to the above-mentioned effects, by collecting the soil of the surrounding ground on the surface of the outer periphery of the pile tip side of the steel pipe pile, While the inner periphery of the mounting hole drilled in the center of the support plate and the tip of the pile are welded, the mounting hole of the support plate can be easily held at the pile tip of the steel pipe pile. Moreover, since soil is used, parts and the like are unnecessary and cost is not increased.

  In addition, in the invention of claim 4, in addition to the above-described effect, a plurality of spacers are disposed on the outer surface of the outer periphery of the pile tip side of the steel pipe pile, so that it is drilled in the center of the support plate. While the inner periphery of the mounting hole and the tip of the pile are welded, the mounting hole of the support plate can be easily and easily held on the tip of the pile of the steel pipe pile.

  According to the invention of claim 5, in addition to the above-described effect, the opening formed in the center of the support plate by attaching an opening locking lid to the mounting hole formed in the center of the support plate. While welding the inner periphery of the hole and the tip of the pile, the mounting hole of the support plate can be easily and easily held on the pile tip of the steel pipe pile.

  Further, in the invention of claim 6, in addition to the above-described effect, the worker holds the support plate by hand, so that the inner periphery of the mounting hole drilled in the center of the support plate and the tip of the pile are During welding, the mounting hole of the support plate can be easily and easily held at the pile tip of the steel pipe pile. In addition, parts and the like are not necessary because workers on site are used.

It is a perspective view of the construction joint board attached between the lower end of the pillar of the building structure which shows the form for implementing this invention, and the pile front-end | tip of a steel pipe pile. (A) is an exploded perspective view of a base plate and an adjustment connecting plate showing an embodiment for carrying out the present invention. (B) is a side view of an adjustment connecting plate showing an embodiment for carrying out the present invention. (A)-(F) are the standard schematic construction procedure diagrams without the misalignment which show the form for implementing this invention. (A)-(F) is a schematic construction procedure figure with the misalignment which shows the form for implementing this invention. (A) is the case of the construction method-1 in the form for implementing this invention, and is a schematic sectional side view which hold | maintains a support plate to the pile tip of a steel pipe pile using a stopper stopper piece, (B) is the same. It is a top view of a figure (A). (A) is the construction method-2 in the form for carrying out this invention, and is a schematic sectional side view in which a support plate is held at the pile tip of a steel pipe pile by using a foundation by soil, (B) is the same figure It is a top view of (A). (A) is construction method-3 in the form for carrying out this invention, and is a schematic sectional side view which makes a support plate hold | maintain to the pile tip of a steel pipe pile using a spacer, (B) is the figure (A) ). (A) is construction method-4 in the form for carrying out this invention, and is a schematic sectional side view in which a support plate is held at a pile tip of a steel pipe pile using an opening locking lid, and (B) is the same. It is a top view of a figure (A). (A) is construction method-5 in the form for carrying out this invention, and is a schematic sectional side view in which an operator holds a support plate on a pile tip of a steel pipe pile by hand, and (B) is the same figure. It is a top view of (A). It is a side view of the standard construction state which shows the form for implementing this invention. It is a side view of the construction state in the case of causing misalignment showing a form for carrying out the present invention. It is a side view of the construction state in case the cut surface of the pile tip of the steel pipe pile which shows the form for implementing this invention inclines.

Hereinafter, the present invention will be described more specifically based on embodiments for carrying out the invention described in the drawings.
In the figure, the construction joint board 1 is used in a construction method of a lightweight building foundation in which a light load of, for example, about 10 to 20 tons acts on one pile, and after the cut steel pipe pile 6 is cut. A support plate 2 attached between the pile tip 61 and the lower end of the column 7 of the lightweight building structure, and connecting and supporting the lower end of the column 7 of the lightweight building structure to the pile tip 61 of the steel pipe pile 6; Consists mainly of.

  The support plate 2 constituting the construction joint board 1 has, for example, a square shape when viewed from the plane. The support plate 2 is located between the base plate 71 at the lower end of the column 7 of the lightweight building structure and the pile tip 61 of the steel pipe pile 6 to support the entire load of the lightweight building structure and to the pile tip side of the steel pipe pile 6. It plays the role of escaping to 62. Since the load acting on the support plate 2 through the column 7 is light, a steel plate that is not too thick is used, and the weight can be easily carried by even one worker.

  A circular mounting hole 21 in which a pile tip 61 of the steel pipe pile 6 is mounted is formed in the center of the support plate 2. The inner diameter of the mounting hole 21 is slightly larger than the outer diameter of the pile tip 61 so that the mounting hole 21 of the support plate 2 can be fitted to the pile tip 61 of the steel pipe pile 6. The support plate 2 is fixed to the pile tip 61 by fillet welding at the inner periphery of the mounting hole 21. This welding is downward and can be performed on site without any hindrance.

  For example, the length of one side of the support plate 2 having a square shape is several times the diameter of the circular pile tip 61. The reason why the support plate 2 is made wider than the diameter of the pile tip 61 is to make it possible to cope with the misalignment of the central axis h of the steel pipe pile 6 that has been laid due to manufacturing errors and construction errors of the lightweight building structure. .

  That is, due to manufacturing errors and construction errors, the central axis k of the column 7 of the lightweight building structure does not coincide with the central axis h of the pile tip 61 of the steel pipe pile 6, and the central axis k of the column 7 of the lightweight building structure is The pile tip 61 of the steel pipe pile 6 will deviate in any direction in all directions of 360 degrees from the position of the central axis h of the pile tip 61, so that the pile tip 61 can be accommodated in any direction in all directions. The support plate 2 is made wider than the diameter.

  The adjustment connecting plate 3 constituting the construction joint board 1 is moved and adjusted on the surface of the support plate 2 in accordance with the planned installation position of the lower end of the column 7 at the time of construction, and is welded to the lower fastening bracket 32 and the upper fastening bracket. The screw rod 31 to which the screw 33 is screwed is planted on the upper surface, and at least the support rod 34 is provided at the center of the upper surface.

  The adjustment connecting plate 3 plays a role of connecting and fixing the column 7 of the lightweight building structure to the support plate 2 by adjusting the horizontal shift and inclination, and the position of the central axis k of the column 7 of the lightweight building structure. After the position of the upper surface center 3a of the adjustment connecting plate 3 is moved and adjusted to coincide with each other, it is fixed to the surface of the support plate 2 at the site by fillet welding a to be described later.

  The adjustment connecting plate 3 has a flat plate shape made of steel having the same shape as the base plate 71 fixed to the lower end of the column 7 of the lightweight building structure, and a plurality of screws formed on the base plate 71 on the upper surface thereof. A plurality of screw rods 31 are vertically planted vertically at locations corresponding to the positions of the rod holes 72. For example, the screw rod 31 is planted by screwing the root side into a screw hole drilled downward on the upper surface of the adjustment connecting plate 3, but may be planted by welding.

  A screw thread is spirally formed on the side peripheral surface of each screw rod 31. The screw rod holes 72 formed in the base plate 71 at the lower end of the column 7 of the lightweight building structure are generally formed at equal intervals on the peripheral side of the central column 7 portion. For this reason, the screw rod 31 is also adjusted and connected. It is planted at equal intervals on the peripheral side of the center of the surface of the plate 3. For example, a high tension bolt is used for the screw rod 31.

  Each screw rod 31 implanted on the surface of the adjustment connecting plate 3 is screwed with a lower fastening bracket 32 and an upper fastening bracket 33 on the lower side and the upper side with a base plate 71 to be fitted interposed therebetween. The The lower tightening bracket 32 and the upper tightening bracket 33 are formed in an annular shape, and a spiral thread corresponding to the thread on the side peripheral surface of the screw rod 31 is formed on the inner peripheral side surface of the central through hole. .

  When the lower surface of the base plate 71 is in direct contact with the upper surface of each lower fastening bracket 32, each lower fastening bracket 32 directly supports the load acting through the column 7 of the lightweight building structure and supports the side of the support plate 2 through the screw rod 31. Fulfills the function of communicating to In other words, the plurality of lower fastening brackets 32 are formed of a lightweight building structure by engaging the threads on the inner peripheral side surfaces of the through holes of the plurality of lower fastening brackets 32 with the screw threads on the side peripheral surface of the screw rod 31. It can support all loads.

  Moreover, since the lower clamp 32 is screwed to the screw rod 31, it can be slightly moved in the vertical direction by slightly turning in either direction, and the height of the lower clamp 32 can be finely adjusted. It is. For this reason, when the surface of the adjustment connecting plate 3 is inclined and not horizontal, the height of the lower fastening bracket 32 screwed to each screw rod 31 is finely adjusted so that the upper surface of the lower fastening bracket 32 is horizontal. Can be adjusted.

  In the upper clamp 33, the base plate 71 of the pillar 7 of the lightweight building structure supported in contact with the upper surface of the lower clamp 32 is moved upward by an upward external force due to the action of vibration or bending moment. It functions to prevent it from coming off. That is, the plurality of upper tightening brackets 33 are external forces that act upward by engaging the threads on the inner peripheral side surface of the through holes of the plurality of upper tightening brackets 33 with the screw threads on the side peripheral surface of the screw rod 31. Can resist.

  The adjustment connecting plate 3 attached to the surface of the support plate 2 may be fixed slightly tilted without being horizontal due to construction errors. For this reason, the center 3a of the base plate 71 in the horizontal state, even if it is slightly tilted in any of all directions around the upper surface center 3a of the adjustment connecting plate 3 in which the screw rods 31 are implanted on the peripheral side, is provided. A support projection 34 is provided to adjust the height.

The support projection 34 has, for example, a rod-like shape, and a screw thread is formed in a spiral shape on the side peripheral surface thereof, and a screw hole is formed in the upper surface center 3a of the adjustment connecting plate 3 downward. The lower side of the protrusion 34 is screwed to adjust the height. The upper end side of the support protrusion 34 with which the lower surface of the base plate 71 is in contact has a rounded shape, and the support protrusion 34 is inclined relative to the base plate 71 in any direction of 360 degrees. It can be supported by.

Next, the construction method of the lightweight building foundation using the construction joint board will be described below.
The steel pipe pile 6 is set in the ground at a predetermined position by using a machine that sets the pipe 6 to a predetermined depth. The steel pipe pile 6 that has been laid may not be straightly laid but may be slightly tilted or shifted in position depending on the construction state or the ground condition at the time of placing.

  Using a cutting machine, the pile front end side 62 of the steel pipe pile 6 partially protruding from the surface of the ground is cut horizontally at a desired length. This cutting operation is an on-site operation, and it is difficult to accurately perform horizontal cutting as in a factory cutting operation, and an inclination error tends to occur.

  Thereafter, the installation work of the construction joint board 1 is performed. The mounting work of the construction joint board 1 is performed by holding the mounting hole 21 of the support plate 2 of the construction joint board 1 at the pile tip 61 of the steel pipe pile 6 and the inner circumference of the mounting hole 21 of the support board 2 and the pile. This is performed by welding and fixing the tip 61 (see FIGS. 3A to 3C and FIGS. 4A to 4C).

In order to hold the mounting hole 21 of the support plate 2 of the joint plate 1 for construction to the pile tip 61 of the steel pipe pile 6, the following construction methods 1 to 5 are performed, but all are simple and easy. This can greatly reduce labor and costs.

[Construction method-1]
In the construction method shown in FIG. 5, the stopper stopper 41 is attached to several places by tack welding on the upper side of the outer peripheral side surface of the pile tip side 62 of the steel pipe pile 6. The mounting position of the stopper stopper 41 is so high that the pile tip 61 and part of the pile tip side 62 of the steel pipe pile 6 are inserted and locked to the lower side of the mounting hole 21 of the support plate 2 so that they do not shift horizontally. That's it. Since the steel pipe pile 6 is generally a magnetic material, when a magnet is attached to the contact surface side of the slip stopper piece 41 with the steel pipe pile 6, the slip stopper piece 41 is connected to the steel pipe using this magnet. The pile 6 can be easily attached to the outer peripheral side surface of the pile tip side 62. In this case, the tack welding stopper piece 41 can be omitted.

  After that, the support plate 2 constituting a part of the construction joint board 1 is attached to the pile tip 61 of the steel pipe pile 6. The mounting hole 21 at the center of the support plate 2 is fitted into the pile tip 61 from above. The support plate 2 is held on the peripheral side of the pile tip 61 of the steel pipe pile 6 with the outer peripheral lower surface of the mounting hole 21 being supported by a stopper stopper piece 41. In this state, some places on the inner periphery of the mounting hole 21 are temporarily fixed to the pile tip 61 by tack welding. This is to prevent the support plate 2 from moving during the subsequent main welding. Thereafter, the entire inner circumference of the mounting hole 21 is firmly fixed to the pile tip 61 of the steel pipe pile 6 by fillet welding.

  When the pile tip 61 of the steel pipe pile 6 is cut horizontally, the support plate 2 of the construction joint board 1 can be mounted horizontally on the pile tip 61 of the steel pipe pile 6. However, when the center axis h of the steel pipe pile 6 is shifted in any direction in the horizontal direction, the center axis h of the support plate 2 of the construction joint board 1 is also shifted in the same state as the steel pipe pile 6.

  Further, when the cutting plane of the pile tip 61 of the steel pipe pile 6 is cut slightly inclined from the horizontal due to the steel pipe pile 6 being set inclined slightly or due to an error during cutting. Although the support plate 2 of the construction joint board 1 cannot be mounted horizontally on the pile tip 61 of the steel pipe pile 6, it is temporarily attached by using the stopper stopper 41 to bring the support plate 2 as close to the horizontal as possible. Welding is performed, followed by fillet welding of main welding. In this case, the support plate 2 of the construction joint board 1 is attached in a slightly inclined state.

  After fixing the support plate 2 of the construction joint board 1 to the pile tip 61 of the steel pipe pile 6 by welding, the adjustment connecting plate 3 is attached to the surface of the support plate 2 (see FIGS. 3D to 3F). When the center axis h of the construction joint board 1 is shifted due to the measurement, the misalignment is adjusted by the adjustment connecting plate 3 (see FIGS. 4D to 4F).

  That is, the adjustment connecting plate 3 is placed on the surface of the support plate 2 so that the upper end of the support projection 34 provided at the upper surface center 3a of the adjusting connection plate 3 coincides with the central axis k of the column 7 of the light building structure to be installed. Adjust the slide movement on the top. In this case, the height of the upper end of the support projection 34 is set so that the height of the base plate 71 at the lower end of the column 7 in contact with the upper end of the support projection 34 provided at the upper surface center 3a of the adjustment connecting plate 3 becomes a predetermined height. Tweak the. Further, the position of each screw rod 31 of the adjustment connecting plate 3 is moved and adjusted while being aligned with each screw rod hole 72 formed in the base plate 71 at the lower end of the column 7.

  The adjustment connecting plate 3 is slid and adjusted on the surface of the support plate 2 so that the upper end of the support projection 34 provided on the upper surface center 3a of the adjusting connecting plate 3 is the center axis k of the column 7 of the lightweight building structure at the predetermined position. Then, the adjustment connecting plate 3 is fixed to the surface of the support plate 2.

  The peripheral edge of the adjustment connecting plate 3 is welded by fillet welding a and fixed to the surface of the support plate 2. Since the fillet weld a is a downward welding above the pile tip 61 of the steel pipe pile 6, it can be performed without excavating the surrounding ground on the tip side of the steel pipe pile 6.

  A lower clamp 32 is screwed onto each screw rod 31 planted on the surface of the adjustment connecting plate 3, and a virtual plane connecting the upper surfaces of the lower clamps 32 is measured to a horizontal plane with a predetermined height. Make fine adjustments while turning each lower clamp 32 so that Since each lower clamp 32 is only slightly moved up and down by screw motion during one rotation, fine adjustment is possible.

  Thereafter, the base plate 71 fixed to the lower end of the column 7 of the lightweight building structure is lowered from above, and the screw rods 31 on the surface of the adjustment connecting plate 3 are relatively placed in the screw rod holes 72 formed in the base plate 71. Then, the base plate 71 is mounted on the adjustment connecting plate 3. After the screw rods 31 of the adjustment connecting plate 3 are inserted into the screw rod holes 72 of the base plate 71, the upper fastening brackets 33 are screwed into the screw rods 31 and tightened. The pillars 7 of the lightweight building structure are connected and supported to the pile tips 61 of the steel pipe piles 6 via the support plate 2 by being clamped and supported by the fastening metal fittings 32 from above and below.

As described above, after connecting and supporting the upper end of each steel pipe pile 6 via the support plate 2 of each column 7 of the lightweight building structure, if necessary, the screw rod 31, the lower fastening bracket 32, the upper fastening The metal fitting 33 is covered with a non-shrinking mortar b. The reason for covering with the mortar b is to avoid the corrosion of the screw rod 31, the lower fastening fitting 32, and the upper fastening fitting 33 and to prevent the base plate 71 from being deformed by the axial force of the column 7.

[Construction method-2]
In the construction method shown in FIG. 6, the soil on the surface of the ground around the steel pipe pile 6 is scraped on the outer peripheral side surface of the pile tip side 62 of the steel pipe pile 6, and the outer peripheral lower surface of the mounting hole 21 of the support plate 2 is temporarily The foundation 42 is supported. Since the support plate 2 is at most about 10 kg and is not so heavy, it can be sufficiently supported by the base 42 made of soil. The support by the soil base 42 is so high that a part of the pile tip 61 and the pile tip side 62 of the steel pipe pile 6 is inserted and locked to the lower side of the mounting hole 21 of the support plate 2 so as not to be displaced in the horizontal direction. Fill the soil to become. This construction method is effective when the pile tip 61 of the steel pipe pile 6 is cut near the surface of the ground and the difference between the surface height of the surrounding ground and the height of the pile tip 61 of the steel pipe pile 6 is small.

  After that, the support plate 2 constituting a part of the construction joint board 1 is attached to the pile tip 61 of the steel pipe pile 6. The mounting hole 21 at the center of the support plate 2 is fitted into the pile tip 61 from above. The support plate 2 is held on the peripheral side of the pile tip 61 of the steel pipe pile 6 by supporting the outer peripheral lower surface of the mounting hole 21 by the soil base 42 collected. In this state, some places on the inner periphery of the mounting hole 21 are temporarily fixed to the pile tip 61 by tack welding. This is to prevent the support plate 2 from moving during the subsequent main welding. Thereafter, the entire inner circumference of the mounting hole 21 is firmly fixed to the pile tip 61 of the steel pipe pile 6 by fillet welding.

  When the pile tip 61 of the steel pipe pile 6 is cut horizontally, the support plate 2 of the construction joint board 1 can be mounted horizontally on the pile tip 61 of the steel pipe pile 6. However, when the center axis h of the steel pipe pile 6 is shifted in any direction in the horizontal direction, the center axis h of the support plate 2 of the construction joint board 1 is also shifted in the same state as the steel pipe pile 6.

  Further, when the cutting plane of the pile tip 61 of the steel pipe pile 6 is cut slightly inclined from the horizontal due to the steel pipe pile 6 being set inclined slightly or due to an error during cutting. The support plate 2 of the construction joint board 1 cannot be mounted horizontally on the pile tip 61 of the steel pipe pile 6, but the support plate 2 is brought close to the horizontal level by using the soil base 42 and is temporarily welded. Then, fillet welding of main welding is performed. In this case, the support plate 2 of the construction joint board 1 is attached in a slightly inclined state.

  After fixing the support plate 2 of the construction joint board 1 to the pile tip 61 of the steel pipe pile 6 by welding, the adjustment connecting plate 3 is attached to the surface of the support plate 2 (see FIGS. 3D to 3F). When the center axis h of the construction joint board 1 is shifted due to the measurement, the misalignment is adjusted by the adjustment connecting plate 3 (see FIGS. 4D to 4F).

  That is, the adjustment connecting plate 3 is placed on the surface of the support plate 2 so that the upper end of the support projection 34 provided at the upper surface center 3a of the adjusting connection plate 3 coincides with the central axis k of the column 7 of the light building structure to be installed. Adjust the slide movement on the top. In this case, the height of the upper end of the support projection 34 is set so that the height of the base plate 71 at the lower end of the column 7 in contact with the upper end of the support projection 34 provided at the upper surface center 3a of the adjustment connecting plate 3 becomes a predetermined height. Tweak the. Further, the position of each screw rod 31 of the adjustment connecting plate 3 is moved and adjusted while being aligned with each screw rod hole 72 formed in the base plate 71 at the lower end of the column 7.

  The adjustment connecting plate 3 is slid and adjusted on the surface of the support plate 2 so that the upper end of the support projection 34 provided on the upper surface center 3a of the adjusting connecting plate 3 is the center axis k of the column 7 of the lightweight building structure at the predetermined position. Then, the adjustment connecting plate 3 is fixed to the surface of the support plate 2.

  The peripheral edge of the adjustment connecting plate 3 is welded by fillet welding a and fixed to the surface of the support plate 2. Since the fillet weld a is a downward welding above the pile tip 61 of the steel pipe pile 6, it can be performed without excavating the surrounding ground on the tip side of the steel pipe pile 6.

  A lower clamp 32 is screwed onto each screw rod 31 planted on the surface of the adjustment connecting plate 3, and a virtual plane connecting the upper surfaces of the lower clamps 32 is measured to a horizontal plane with a predetermined height. Make fine adjustments while turning each lower clamp 32 so that Since each lower clamp 32 is only slightly moved up and down by screw motion during one rotation, fine adjustment is possible.

  Thereafter, the base plate 71 fixed to the lower end of the column 7 of the lightweight building structure is lowered from above, and the screw rods 31 on the surface of the adjustment connecting plate 3 are relatively placed in the screw rod holes 72 formed in the base plate 71. Then, the base plate 71 is mounted on the adjustment connecting plate 3. After the screw rods 31 of the adjustment connecting plate 3 are inserted into the screw rod holes 72 of the base plate 71, the upper fastening brackets 33 are screwed into the screw rods 31 and tightened. The pillars 7 of the lightweight building structure are connected and supported to the pile tips 61 of the steel pipe piles 6 via the support plate 2 by being clamped and supported by the fastening metal fittings 32 from above and below.

As described above, after connecting and supporting the upper end of each steel pipe pile 6 via the support plate 2 of each column 7 of the lightweight building structure, if necessary, the screw rod 31, the lower fastening bracket 32, the upper fastening The metal fitting 33 is covered with a non-shrinking mortar b. The reason for covering with the mortar b is to avoid the corrosion of the screw rod 31, the lower fastening fitting 32, and the upper fastening fitting 33 and to prevent the base plate 71 from being deformed by the axial force of the column 7.

[Construction method-3]
In the construction method shown in FIG. 7, a plurality of spacers 43 that temporarily support the outer peripheral lower surface of the mounting hole 21 of the support plate 2 are arranged in the circumferential direction on the surface of the outer periphery of the pile tip side 62 of the steel pipe pile 6. To do. Since the support plate 2 is not so heavy at most at around 10 kg, it can be sufficiently supported by a plurality of spacers 43 arranged in the circumferential direction. Support to the spacer 43 can be supported at such a height that a part of the pile tip 61 and the pile tip side 62 of the steel pipe pile 6 is inserted and locked to the lower side of the mounting hole 21 of the support plate 2 so as not to be displaced in the horizontal direction. To be adjusted.

  After that, the support plate 2 constituting a part of the construction joint board 1 is attached to the pile tip 61 of the steel pipe pile 6. The mounting hole 21 at the center of the support plate 2 is fitted into the pile tip 61 from above. The support plate 2 is held on the peripheral side of the pile tip 61 of the steel pipe pile 6 with the outer peripheral lower surface of the mounting hole 21 supported by the spacer 43 disposed on the outer surface of the pile tip side 62. In this state, some places on the inner periphery of the mounting hole 21 are temporarily fixed to the pile tip 61 by tack welding. This is to prevent the support plate 2 from moving during the subsequent main welding. Thereafter, the entire inner circumference of the mounting hole 21 is firmly fixed to the pile tip 61 of the steel pipe pile 6 by fillet welding.

  When the pile tip 61 of the steel pipe pile 6 is cut horizontally, the support plate 2 of the construction joint board 1 can be mounted horizontally on the pile tip 61 of the steel pipe pile 6. However, when the center axis h of the steel pipe pile 6 is shifted in any direction in the horizontal direction, the center axis h of the support plate 2 of the construction joint board 1 is also shifted in the same state as the steel pipe pile 6.

  Further, when the cutting plane of the pile tip 61 of the steel pipe pile 6 is cut slightly inclined from the horizontal due to the steel pipe pile 6 being set inclined slightly or due to an error during cutting. The support plate 2 of the construction joint board 1 cannot be mounted horizontally on the pile tip 61 of the steel pipe pile 6, but the support plate 2 is made even closer to the horizontal using the spacer 43 and is temporarily welded. After that, fillet welding of main welding is performed. In this case, the support plate 2 of the construction joint board 1 is attached in a slightly inclined state.

  After fixing the support plate 2 of the construction joint board 1 to the pile tip 61 of the steel pipe pile 6 by welding, the adjustment connecting plate 3 is attached to the surface of the support plate 2 (see FIGS. 3D to 3F). When the center axis h of the construction joint board 1 is shifted due to the measurement, the misalignment is adjusted by the adjustment connecting plate 3 (see FIGS. 4D to 4F).

  That is, the adjustment connecting plate 3 is placed on the surface of the support plate 2 so that the upper end of the support projection 34 provided at the upper surface center 3a of the adjusting connection plate 3 coincides with the central axis k of the column 7 of the light building structure to be installed. Adjust the slide movement on the top. In this case, the height of the upper end of the support projection 34 is set so that the height of the base plate 71 at the lower end of the column 7 in contact with the upper end of the support projection 34 provided at the upper surface center 3a of the adjustment connecting plate 3 becomes a predetermined height. Tweak the. Further, the position of each screw rod 31 of the adjustment connecting plate 3 is moved and adjusted while being aligned with each screw rod hole 72 formed in the base plate 71 at the lower end of the column 7.

  The adjustment connecting plate 3 is slid and adjusted on the surface of the support plate 2 so that the upper end of the support projection 34 provided on the upper surface center 3a of the adjusting connecting plate 3 is the center axis k of the column 7 of the lightweight building structure at the predetermined position. Then, the adjustment connecting plate 3 is fixed to the surface of the support plate 2.

  The peripheral edge of the adjustment connecting plate 3 is welded by fillet welding a and fixed to the surface of the support plate 2. Since the fillet weld a is a downward welding above the pile tip 61 of the steel pipe pile 6, it can be performed without excavating the surrounding ground on the tip side of the steel pipe pile 6.

  A lower clamp 32 is screwed onto each screw rod 31 planted on the surface of the adjustment connecting plate 3, and a virtual plane connecting the upper surfaces of the lower clamps 32 is measured to a horizontal plane with a predetermined height. Make fine adjustments while turning each lower clamp 32 so that Since each lower clamp 32 is only slightly moved up and down by screw motion during one rotation, fine adjustment is possible.

  Thereafter, the base plate 71 fixed to the lower end of the column 7 of the lightweight building structure is lowered from above, and the screw rods 31 on the surface of the adjustment connecting plate 3 are relatively placed in the screw rod holes 72 formed in the base plate 71. Then, the base plate 71 is mounted on the adjustment connecting plate 3. After the screw rods 31 of the adjustment connecting plate 3 are inserted into the screw rod holes 72 of the base plate 71, the upper fastening brackets 33 are screwed into the screw rods 31 and tightened. The pillars 7 of the lightweight building structure are connected and supported to the pile tips 61 of the steel pipe piles 6 via the support plate 2 by being clamped and supported by the fastening metal fittings 32 from above and below.

As described above, after connecting and supporting the upper end of each steel pipe pile 6 via the support plate 2 of each column 7 of the lightweight building structure, if necessary, the screw rod 31, the lower fastening bracket 32, the upper fastening The metal fitting 33 is covered with a non-shrinking mortar b. The reason for covering with the mortar b is to avoid the corrosion of the screw rod 31, the lower fastening fitting 32, and the upper fastening fitting 33 and to prevent the base plate 71 from being deformed by the axial force of the column 7.

[Construction Method-4]
In the construction method shown in FIG. 8, an opening locking lid 44 having both sides opened in the mounting hole 21 of the support plate 2 is fitted and attached. Thus, the support plate 2 is supported by the pile tip 61 of the steel pipe pile 6 by placing a part of the lower surface of the opening locking lid 44 attached to the mounting hole 21 on the pile tip 61 of the steel pipe pile 6. At this time, the opening locking lid 44 is attached so that the side surfaces of both ends thereof extending in the diameter direction of the mounting hole 21 are in close contact with the inner peripheral side surface of the mounting hole 21. The force acts in the direction of detachment depending on the weight of the support plate 2, but since the weight of the support plate 2 is at most about 10 kg, it is not easily detached. Since the support plate 2 is generally a magnetic material, when a magnet is attached to the contact surface side with the mounting hole 21 of the support plate 2 at both ends of the opening locking lid 44, the opening is made using this magnet. The locking lid 44 can be easily and firmly attached to the inner peripheral side surface of the mounting hole 21 of the support plate 2.

  Further, the mounting position of the opening locking lid 44 fitted into the mounting hole 21, that is, the bottom surface position of the opening locking lid 44, is the pile tip 61 and the pile tip side 62 of the steel pipe pile 6 on the lower side of the mounting hole 21 of the support plate 2. The height is such that a part of is inserted and locked and does not shift in the horizontal direction. Since the support plate 2 is not so heavy at most around 10 kg, it can be sufficiently supported by the opening locking lids 44 whose side surfaces at both ends are in close contact with the inner peripheral side surface of the mounting hole 21.

  After fitting the opening locking lid 44 having both sides opened to the mounting hole 21 of the support plate 2, the support plate 2 constituting a part of the construction joint board 1 is attached to the pile tip 61 of the steel pipe pile 6. The mounting hole 21 at the center of the support plate 2 is fitted into the pile tip 61 from above. The support plate 2 is supported on the pile tip 61 of the steel pipe pile 6 by the opening locking lid 44 and is held on the peripheral side of the pile tip 61 of the steel pipe pile 6. In this state, some locations on the inner periphery of the mounting hole 21 in the opened portions on both sides of the opening locking lid 44 are temporarily fixed to the pile tip 61 by tack welding. This is to prevent the support plate 2 from moving during the subsequent main welding. Thereafter, the opening locking lid 44 is removed from the mounting hole 21 and the entire inner periphery of the mounting hole 21 is firmly fixed to the pile tip 61 of the steel pipe pile 6 by fillet welding.

  When the pile tip 61 of the steel pipe pile 6 is cut horizontally, the support plate 2 of the construction joint board 1 can be mounted horizontally on the pile tip 61 of the steel pipe pile 6. However, when the center axis h of the steel pipe pile 6 is shifted in any direction in the horizontal direction, the center axis h of the support plate 2 of the construction joint board 1 is also shifted in the same state as the steel pipe pile 6.

  Further, when the cutting plane of the pile tip 61 of the steel pipe pile 6 is cut slightly inclined from the horizontal due to the steel pipe pile 6 being set inclined slightly or due to an error during cutting. Although the support plate 2 of the construction joint board 1 cannot be mounted horizontally on the pile tip 61 of the steel pipe pile 6, it is temporarily welded by bringing it close to the horizontal using the opening locking lid 44, and thereafter Perform fillet welding of the main welding. In this case, the support plate 2 of the construction joint board 1 is attached in a slightly inclined state.

  After fixing the support plate 2 of the construction joint board 1 to the pile tip 61 of the steel pipe pile 6 by welding, the adjustment connecting plate 3 is attached to the surface of the support plate 2 (see FIGS. 3D to 3F). When the center axis h of the construction joint board 1 is shifted due to the measurement, the misalignment is adjusted by the adjustment connecting plate 3 (see FIGS. 4D to 4F).

  That is, the adjustment connecting plate 3 is placed on the surface of the support plate 2 so that the upper end of the support projection 34 provided at the upper surface center 3a of the adjusting connection plate 3 coincides with the central axis k of the column 7 of the light building structure to be installed. Adjust the slide movement on the top. In this case, the height of the upper end of the support projection 34 is set so that the height of the base plate 71 at the lower end of the column 7 in contact with the upper end of the support projection 34 provided at the upper surface center 3a of the adjustment connecting plate 3 becomes a predetermined height. Tweak the. Further, the position of each screw rod 31 of the adjustment connecting plate 3 is moved and adjusted while being aligned with each screw rod hole 72 formed in the base plate 71 at the lower end of the column 7.

  The adjustment connecting plate 3 is slid and adjusted on the surface of the support plate 2 so that the upper end of the support projection 34 provided on the upper surface center 3a of the adjusting connecting plate 3 is the center axis k of the column 7 of the lightweight building structure at the predetermined position. Then, the adjustment connecting plate 3 is fixed to the surface of the support plate 2.

  The peripheral edge of the adjustment connecting plate 3 is welded by fillet welding a and fixed to the surface of the support plate 2. Since the fillet weld a is a downward welding above the pile tip 61 of the steel pipe pile 6, it can be performed without excavating the surrounding ground on the tip side of the steel pipe pile 6.

  A lower clamp 32 is screwed onto each screw rod 31 planted on the surface of the adjustment connecting plate 3, and a virtual plane connecting the upper surfaces of the lower clamps 32 is measured to a horizontal plane with a predetermined height. Make fine adjustments while turning each lower clamp 32 so that Since each lower clamp 32 is only slightly moved up and down by screw motion during one rotation, fine adjustment is possible.

  Thereafter, the base plate 71 fixed to the lower end of the column 7 of the lightweight building structure is lowered from above, and the screw rods 31 on the surface of the adjustment connecting plate 3 are relatively placed in the screw rod holes 72 formed in the base plate 71. Then, the base plate 71 is mounted on the adjustment connecting plate 3. After the screw rods 31 of the adjustment connecting plate 3 are inserted into the screw rod holes 72 of the base plate 71, the upper fastening brackets 33 are screwed into the screw rods 31 and tightened. The pillars 7 of the lightweight building structure are connected and supported to the pile tips 61 of the steel pipe piles 6 via the support plate 2 by being clamped and supported by the fastening metal fittings 32 from above and below.

As described above, after connecting and supporting the upper end of each steel pipe pile 6 via the support plate 2 of each column 7 of the lightweight building structure, if necessary, the screw rod 31, the lower fastening bracket 32, the upper fastening The metal fitting 33 is covered with a non-shrinking mortar b. The reason for covering with the mortar b is to avoid the corrosion of the screw rod 31, the lower fastening fitting 32, and the upper fastening fitting 33 and to prevent the base plate 71 from being deformed by the axial force of the column 7.

[Construction Method-5]
In the construction method shown in FIG. 9, a method in which an operator holds the support plate 2 with the hand 45 until the support plate 2 is temporarily welded to the pile tip 61 of the steel pipe pile 6 is adopted. A part of the pile tip 61 and the pile tip side 62 of the steel pipe pile 6 is inserted and locked to the lower side of the mounting hole 21 of the support plate 2 and is fitted at a height that does not shift in the horizontal direction. Hold the plate 2 with the hand 45. Since the support plate 2 is at most about 10 kg and is not so heavy, the worker can hold the support plate 2 with the hand 45 and sufficiently support it.

  After holding the support plate 2 with the hand 45, the worker attaches the support plate 2 constituting a part of the construction joint board 1 to the pile tip 61 of the steel pipe pile 6. The mounting hole 21 at the center of the support plate 2 is fitted into the pile tip 61 from above. The support plate 2 is supported on the pile tip 61 of the steel pipe pile 6 by an operator holding it with a hand 45 and held on the peripheral side of the pile tip 61 of the steel pipe pile 6. In this state, some places on the inner periphery of the mounting hole 21 are temporarily fixed to the pile tip 61 by tack welding. This is to prevent the support plate 2 from moving during the subsequent main welding. Thereafter, the entire inner circumference of the mounting hole 21 is firmly fixed to the pile tip 61 of the steel pipe pile 6 by fillet welding.

  When the pile tip 61 of the steel pipe pile 6 is cut horizontally, the support plate 2 of the construction joint board 1 can be mounted horizontally on the pile tip 61 of the steel pipe pile 6. However, when the center axis h of the steel pipe pile 6 is shifted in any direction in the horizontal direction, the center axis h of the support plate 2 of the construction joint board 1 is also shifted in the same state as the steel pipe pile 6.

  Further, when the cutting plane of the pile tip 61 of the steel pipe pile 6 is cut slightly inclined from the horizontal due to the steel pipe pile 6 being set inclined slightly or due to an error during cutting. Although the support plate 2 of the construction joint panel 1 cannot be mounted horizontally on the pile tip 61 of the steel pipe pile 6, it is temporarily welded by using the hand 45 of the worker to bring it closer to the horizontal, and then Perform fillet welding of the main welding. In this case, the support plate 2 of the construction joint board 1 is attached in a slightly inclined state.

  After fixing the support plate 2 of the construction joint board 1 to the pile tip 61 of the steel pipe pile 6 by welding, the adjustment connecting plate 3 is attached to the surface of the support plate 2 (see FIGS. 3D to 3F). When the center axis h of the construction joint board 1 is shifted due to the measurement, the misalignment is adjusted by the adjustment connecting plate 3 (see FIGS. 4D to 4F).

  That is, the adjustment connecting plate 3 is placed on the surface of the support plate 2 so that the upper end of the support projection 34 provided at the upper surface center 3a of the adjusting connection plate 3 coincides with the central axis k of the column 7 of the light building structure to be installed. Adjust the slide movement on the top. In this case, the height of the upper end of the support projection 34 is set so that the height of the base plate 71 at the lower end of the column 7 in contact with the upper end of the support projection 34 provided at the upper surface center 3a of the adjustment connecting plate 3 becomes a predetermined height. Tweak the. Further, the position of each screw rod 31 of the adjustment connecting plate 3 is moved and adjusted while being aligned with each screw rod hole 72 formed in the base plate 71 at the lower end of the column 7.

  The adjustment connecting plate 3 is slid and adjusted on the surface of the support plate 2 so that the upper end of the support projection 34 provided on the upper surface center 3a of the adjusting connecting plate 3 is the center axis k of the column 7 of the lightweight building structure at the predetermined position. Then, the adjustment connecting plate 3 is fixed to the surface of the support plate 2.

  The peripheral edge of the adjustment connecting plate 3 is welded by fillet welding a and fixed to the surface of the support plate 2. Since the fillet weld a is a downward welding above the pile tip 61 of the steel pipe pile 6, it can be performed without excavating the surrounding ground on the tip side of the steel pipe pile 6.

  A lower clamp 32 is screwed onto each screw rod 31 planted on the surface of the adjustment connecting plate 3, and a virtual plane connecting the upper surfaces of the lower clamps 32 is measured to a horizontal plane with a predetermined height. Make fine adjustments while turning each lower clamp 32 so that Since each lower clamp 32 is only slightly moved up and down by screw motion during one rotation, fine adjustment is possible.

  Thereafter, the base plate 71 fixed to the lower end of the column 7 of the lightweight building structure is lowered from above, and the screw rods 31 on the surface of the adjustment connecting plate 3 are relatively placed in the screw rod holes 72 formed in the base plate 71. Then, the base plate 71 is mounted on the adjustment connecting plate 3. After the screw rods 31 of the adjustment connecting plate 3 are inserted into the screw rod holes 72 of the base plate 71, the upper fastening brackets 33 are screwed into the screw rods 31 and tightened. The pillars 7 of the lightweight building structure are connected and supported to the pile tips 61 of the steel pipe piles 6 via the support plate 2 by being clamped and supported by the fastening metal fittings 32 from above and below.

  As described above, after connecting and supporting the upper end of each steel pipe pile 6 via the support plate 2 of each column 7 of the lightweight building structure, if necessary, the screw rod 31, the lower fastening bracket 32, the upper fastening The metal fitting 33 is covered with a non-shrinking mortar b. The reason for covering with the mortar b is to avoid the corrosion of the screw rod 31, the lower fastening fitting 32, and the upper fastening fitting 33 and to prevent the base plate 71 from being deformed by the axial force of the column 7.

  The present invention is not limited to the embodiment for carrying out the invention, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Construction joint board 2 Support plate 21 Mounting hole 3 Adjustment connection plate 3a Center of upper surface of adjustment connection plate 31 Screw rod 32 Lower tightening bracket 33 Upper tightening bracket 34 Support projection 41 Stop stopper piece 42 Base 43 Spacer 44 Opening Stopper 45 Hand 6 Steel pipe pile 61 Pile tip 62 Pile tip side 7 Pillar of building structure 71 Base plate 72 Screw rod hole a Fillet weld b Mortar h Central axis of steel pipe pile, central axis of construction joint board k Building structure Center axis of object pillar

Claims (6)

The steel pipe pile set in the ground is cut to the desired length, and the mounting hole drilled in the center of the support plate is held at the tip of the pile of the steel pipe pile. The pile protrusion is fixed without protruding from the mounting hole, and the support projection at the center of the upper surface of the adjustment connecting plate, in which a plurality of screw rods are implanted on the upper surface on the surface of the support plate wider than the pile tip, is fixed. Each screw rod formed on the base plate fixed to the lower end of the column of the lightweight building structure so that the upper end coincides with the central axis of the column of the lightweight building structure at the planned installation position The adjustment connecting plate is moved and adjusted so as to coincide with the hole, fixed, and each lower clamp is connected to each screw rod planted on the upper surface of the adjustment connecting plate. Are screwed together while making fine adjustments so that becomes a horizontal surface of a predetermined height, and the base plate is lowered to Each screw rod is inserted into each screw rod hole of the base plate, the lower surface of the base plate is in contact with the upper surface of each lower clamp, and then the upper clamp is screwed into each screw rod and tightened. A construction method for a lightweight building foundation, characterized in that each column of a lightweight building structure is connected to and supported by a pile end of each steel pipe pile via a construction joint board composed of the support plate and the adjustment connecting plate. Cut the steel pipe pile set in the ground to the desired length, attach a stopper stopper piece to the upper side of the outer peripheral side of the steel pipe pile tip side, and support the outer peripheral lower surface of the mounting hole of the support plate with the stopper stopper piece. With the mounting hole drilled in the center of the support plate held at the pile tip of the steel pipe pile, the inner periphery of the mounting hole of the support plate and the pile tip are welded so that the pile tip protrudes from the mounting hole. fixed without pillars on the surface of the wider the support plate from the pile tip, lightweight building structures of the upper end is planned installation position of the bearing projection of the center of the upper surface of the adjustment connector plate having a plurality of threaded rods planted on the upper surface The adjustment coupling plate is moved so as to coincide with the central axis of the adjustment plate and the screw rod holes formed in the base plate fixed to the lower end of the column of the lightweight building structure. Fix while adjusting, and each lower part on each screw rod planted on the upper surface of the adjustment connecting plate The brackets are screwed together while making fine adjustments so that the virtual plane connecting the upper surfaces of the respective lower clamps becomes a horizontal plane of a predetermined height, and the base plate is lowered and each screw is inserted into each screw rod hole of the base plate. After inserting the rod and contacting the lower surface of the base plate to the upper surface of each lower clamp, the upper clamp is screwed onto each screw rod and tightened, and each column of the lightweight building structure is attached to each steel pipe pile. The construction method of the lightweight building foundation characterized by making it connect and support to the pile front-end | tip via the construction joint board comprised from the said support plate and an adjustment connection board. A steel pipe pile set in the ground is cut to the desired length, and the ground of the surrounding ground is gathered on the outer surface of the outer periphery of the pile end of the steel pipe pile to create a foundation by the soil, and the support plate is used on the foundation of the soil. With the mounting hole drilled in the center of the support plate held at the pile tip of the steel pipe pile, the inner circumference of the support plate mounting hole and the pile tip are welded Fix the pile tip without protruding from the mounting hole, and install the upper end of the support projection at the center of the upper surface of the adjustment connecting plate with multiple screw rods on the upper surface of the support plate wider than the tip of the pile Match each screw rod of the adjustment connecting plate to each screw rod hole formed in the base plate fixed to the lower end of the column of the lightweight building structure so as to coincide with the central axis of the column of the lightweight building structure at the position As shown above, each adjusting rod is fixed while moving and adjusting, and each screw rod planted on the upper surface of the adjusting connecting plate The lower clamps are screwed together with fine adjustment so that the virtual plane connecting the upper surfaces of the lower clamps becomes a horizontal plane of a predetermined height, and the base plate is lowered to open each screw rod hole of the base plate Each screw rod is inserted through and the lower surface of the base plate is in contact with the upper surface of each lower clamp, and then the upper clamp is screwed into each screw rod and tightened to attach each column of the lightweight building structure. A construction method for a lightweight building foundation characterized in that it is connected and supported to the pile tip of each steel pipe pile via a construction joint board composed of the support plate and the adjustment connecting plate. The steel pipe pile set in the ground is cut to the desired length, a plurality of spacers are arranged on the outer surface of the outer periphery of the pile end side of the steel pipe pile, and the outer peripheral lower surface of the mounting hole of the support plate is covered with the plurality of spacers. Support and hold the attachment hole drilled in the center of the support plate at the pile tip of the steel pipe pile, weld the inner periphery of the attachment hole of the support plate and the pile tip, and project the pile tip from the attachment hole The upper end of the support projection at the center of the upper surface of the adjustment connecting plate in which a plurality of screw rods are implanted on the upper surface of the support plate wider than the tip of the pile is fixed. The adjustment connecting plate is aligned with the central axis of the column and the screw rods of the adjustment connecting plate are aligned with the screw rod holes formed in the base plate fixed to the lower end of the column of the lightweight building structure. Fix it while moving and adjust it, and attach each lower clamp to each screw rod installed on the upper surface of the adjustment connecting plate. Each screw rod is screwed into each screw rod hole of the base plate by lowering the base plate by fine adjustment so that a virtual plane connecting the upper surfaces of the respective lower clamps becomes a horizontal surface of a predetermined height. After inserting the bottom plate of the base plate into contact with the upper surface of each lower clamp, the upper clamp is screwed into each screw rod and tightened, and each column of the lightweight building structure is attached to each steel pipe pile. A construction method for a lightweight building foundation, characterized in that the pile tip is connected and supported via a construction joint board composed of the support plate and the adjustment connecting plate. Cut the steel pipe pile set in the ground to the desired length, attach an opening locking lid to the mounting hole drilled in the center of the support plate, and a part of the lower surface of the opening locking lid is at the pile tip of the steel pipe pile a support plate supported by being placed in a state where the mounting holes are held in pile tip of the steel pipe pile of the support plate, mounted pile tip by welding the inner circumference and pile tip of the mounting hole of the support plate Lightweight building that is fixed without protruding from the hole , and the upper end of the support projection at the center of the upper surface of the adjustment connecting plate with a plurality of screw rods planted on the upper surface of the support plate wider than the tip of the pile. The above adjustment is made so that it matches the central axis of the pillar of the structure and each screw rod of the adjustment connecting plate matches with each screw rod hole formed in the base plate fixed to the lower end of the pillar of the lightweight building structure. Fix the connecting plate while moving and adjusting it, and attach each lower clamp to each screw rod planted on the upper surface of the adjusting connecting plate. The base plate is lowered and finely adjusted so that the imaginary plane connecting the upper surfaces of the lower clamps is a horizontal plane, and the base plate is lowered and the screw rods are inserted into the screw rod holes of the base plate. After the lower surface of the base plate is in contact with the upper surface of each lower clamp, the upper clamp is screwed onto each screw rod and tightened, and each column of the lightweight building structure is connected to the pile tip of each steel pipe pile. The construction method of the lightweight building foundation characterized by connecting and supporting through the joint board for construction comprised from the said support plate and an adjustment connection board. The steel pipe pile that has been sunk in the ground is cut to the desired length, and the operator holds the support plate by hand and supports the mounting hole drilled in the center of the support plate at the tip of the pile of the steel pipe pile. The inner periphery of the plate mounting hole and the tip of the pile are welded to fix the pile tip without protruding from the mounting hole , and a plurality of screw rods are implanted on the upper surface of the support plate wider than the tip of the pile. The upper end of the support protrusion at the center of the upper surface of the adjustment connecting plate is aligned with the center axis of the light building structure column at the planned installation position, and each screw rod of the adjusting connection plate is fixed to the lower end of the light building structure column. The adjustment connecting plate is fixed while moving and adjusting so as to match each screw rod hole formed on the base plate, and each lower clamp is attached to each screw rod installed on the upper surface of the adjustment connecting plate. Threaded with fine adjustment so that the imaginary plane connecting the upper surfaces of the lower clamps becomes a horizontal plane with a predetermined height. The base plate is lowered, the screw rods are inserted into the screw rod holes of the base plate, the lower surface of the base plate is brought into contact with the upper surface of the lower tightening bracket, and the upper tightening bracket is attached to each screw rod. Lightweight, characterized by being screwed and tightened to connect and support each column of a lightweight building structure to the pile tip of each steel pipe pile via a construction joint board composed of the support plate and the adjustment connecting plate. Building foundation construction method.

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