JP4332651B2 - Foundation reinforcement device and foundation construction method - Google Patents

Description

  The present invention relates to a foundation reinforcement device and a foundation construction method that are suitably used for construction of a foundation that supports a base of a relatively low-rise single-family house such as a wooden house or a 2 × 4 house constructed for a general house.

  Japan is an earthquake-prone area, and there are many areas with steep rivers and soft ground, and there is also progress in housing development in urban areas, improvement of paved roads, and reduction in water retention capacity due to devastation of forests in the source areas. Every year, many disasters cause valuable property houses to collapse in an instant. In urban areas that are fully equipped with domestic drainage channels, in the case of heavy rains where the rainfall exceeds 50 mm, rainwater that falls on the road surface flows into the domestic drainage channel at a time, overflows, and often flows into residential land. ing.

  In detached houses and the like, various measures are taken to improve the strength of building parts exclusively in preparation for disasters such as large earthquakes and floods, for example, hole down construction methods, hardware connection or wall strength enhancement. In houses, etc., a foundation foundation with a reinforced concrete structure is generally constructed by excavating a foundation groove of a predetermined depth in the ground, assembling a formwork inside the foundation groove, and then placing concrete in this formwork and then placing concrete. The foundation is built on this foundation and the building is built.

  The direct foundation described above is generally formed at a height of about 300 mm to 500 mm from the ground. As for the direct foundation, the cloth foundation formed around the foundation is mainly used from the independent foundation installed on the pillar part, and this cloth foundation is also an inverted T-shape that aims to improve the strength. Has been adopted. In addition, the direct foundation is further improved in strength by adopting a solid foundation that is formed in substantially the same area as the building and disperses the entire load widely.

  On the other hand, in detached houses, etc., for example, when building in a place where ground improvement is necessary due to sloping ground or soft ground, it is difficult to secure the desired height with the above-mentioned cloth foundation or solid foundation Therefore, special foundation construction is required. For example, Patent Document 1 discloses a kind of a base column that is provided with a plurality of pin-shaped or fin-shaped projections on the outer peripheral surface and is embedded and fixed in a necessary portion, and a salt cement column in which a lower end portion of the foundation column is embedded. A pile foundation is disclosed.

Japanese Patent Laid-Open No. 2001-164581

  By the way, in a house etc., especially when it is built near soft ground or rivers, an event may occur that the muddy flow that has flowed into the foundation collides with the foundation and collapses due to swirling the foundation forming ground . The foundation-forming ground is damaged up to 1 m from the ground surface and destroys the foundation, so that a firmly built building collapses while retaining its form.

  Therefore, in houses and the like, by forming a foundation using a pile foundation that is driven deep into the ground as disclosed in Patent Document 1, an extremely effective response to the above-described damage of the foundation formation ground is illustrated. Be able to. The pile foundation method has been conventionally used for the foundation formation of high-rise buildings, but it requires large heavy machinery and space to drive and embed the pile, which is a large-scale construction. The pile foundation method generates large noises and vibrations when driving piles, and when applied to ordinary houses in urban areas where houses are built, the impact on adjacent houses is extremely large. In addition, since the pile foundation method is relatively expensive and requires a long construction period, it has been conventionally employed only for foundation construction for high-rise buildings, except for special places such as sloping land.

  Therefore, the present invention has been proposed for the purpose of providing a foundation reinforcement device and a foundation construction method that realizes improvement in disaster resistance and durability against floods, earthquakes, etc. in wooden houses, etc. by inexpensive and simple construction. It is.

A foundation reinforcing device according to the present invention that achieves the above-described object comprises a deep foundation supporting floor base body of a precast concrete product, and a reinforcing pile body including a three-layer structure of a steel frame, a cylindrical pile member, and a holding concrete portion. Is done. The foundation reinforcement device is composed of a deep foundation support member with a deep foundation support member made of a reinforced concrete product in which a first reinforcing bar is arranged inside, and a mounting portion provided with a plurality of attachment holes. It is comprised from the steel plate for fixation formed by projecting from a surface and integrating a base end part with a deep foundation concrete member. The foundation reinforcing device is installed on the floor excavation surface in the deep foundation construction hole in which the deep foundation supporting floor body is excavated directly at a predetermined position in the foundation forming region with a depth of 1 m or more and 2 m or less . In the foundation reinforcement device, the reinforcing pile body is erected on the main surface of the deep foundation concrete member by connecting and fixing the lower end part to the mounting part of the steel plate for fixing and projecting the upper end part directly to the construction surface of the foundation part forming area A steel pile member, a cylindrical pile member standing up on the main surface of the deep foundation concrete member with the upper end portion protruding from the upper end opening of the steel frame member and housed in the internal space, and The inner space portion is formed by filling concrete and is constituted by a holding concrete portion that holds the steel frame. In the foundation reinforcement device, the reinforcing pile body is embedded in the deep foundation construction hole with the lower end part integrated on the deep foundation support floor, and the upper end part projects directly to the construction surface in the foundation forming area. Integrated directly with the foundation. In the foundation reinforcing device, the reinforcing pile body reinforces the direct foundation formed directly in the foundation portion forming region by fixing the second reinforcing bar to the upper end portion of the steel frame and directly integrated with the deep foundation supporting floor base body.

  The foundation reinforcing device configured as described above is embedded in the deep foundation construction hole that is excavated at a predetermined position in the foundation forming region that forms the foundation that supports the foundation of the building, exposing the upper end portion of the tubular pile member. In addition, a direct foundation such as a cloth foundation or a solid foundation is integrated with the exposed upper end portion. The foundation reinforcement device is often built with a total length of about 1m or more and 2m or less, for example, because there are many places where the buried soil of the constructed land is about 2m or less and the ground damage is about 1m during floods. Well, it is possible to construct in a deep foundation construction hole excavated by, for example, a small backhoe without using a large heavy machine. The foundation reinforcement device is a machine that is large against the force in the horizontal direction and withdrawing direction due to the anchoring action of the deep foundation support base and the three-layer structure of steel frame, retaining concrete part and cylindrical pile member. Has high rigidity. Therefore, the foundation reinforcement device directly reinforces the foundation against earth pressure, building weight, or pulling friction force to form a solid foundation as a whole and hold the building. As for the foundation reinforcement device, steel frames and cylindrical pile members are widely used as building materials and can be easily obtained, and at the same time, low cost is achieved by using relatively inexpensive and high mechanical strength H-shaped steel and I-shaped steel. Is achieved. In addition, the basic reinforcement device stores the steel frame material as the core material in the internal space of the cylindrical material, and the holding concrete portion for holding the steel frame material is formed using the cylindrical material as a mold frame. It is formed efficiently.

Moreover, the foundation construction method concerning this invention which achieves the objective mentioned above is the deep pile support flooring body of a precast concrete product, the reinforcement pile body which consists of a three-layer structure of a steel frame material, a cylindrical pile member, and a holding concrete part, It is the foundation construction method which constituted the foundation reinforcement part by. The foundation construction method consists of a deep foundation concrete member consisting of a reinforced concrete product with the first rebar inside, and a base part that protrudes from the main surface of the deep foundation concrete member with a plurality of attachment holes. A deep foundation supporting floor base body composed of a steel plate for fixation integrated with a deep foundation concrete member is embedded in a deep foundation construction hole excavated directly in the foundation formation region. The foundation construction method consists of a steel frame that is erected on the main surface of the deep foundation concrete member with the lower end connected to and fixed to the mounting part of the fixing steel plate, and the upper end part directly projecting to the construction surface of the foundation forming area. The steel pile is stored in the internal space with the upper end portion protruding from the upper end opening, and is placed on the main surface of the deep foundation concrete member, and the concrete is placed in the internal space of the cylindrical pile member. A reinforced pile body, which is formed by filling and comprising a holding concrete portion for holding a steel frame, is erected on a deep foundation support floor body. In the foundation construction method, the foundation reinforcement portion reinforces the direct foundation formed directly in the foundation portion formation region by fixing the second reinforcing bar to the upper end portion of the steel frame and directly integrated with the deep foundation support floor body. In the foundation construction method, the foundation reinforcement part construction process includes a deep foundation construction hole excavation process, a floor excavation part formation process, a deep foundation support floor body installation process, a steel frame standing process, and a tubular pile member installation process. And a deep foundation construction hole backfilling step.

In the foundation construction method, in the deep foundation construction hole excavation process, a deep foundation construction hole is excavated with a depth of 1 m or more and 2 m or less directly at a predetermined position in the foundation formation region. In the deep foundation construction hole drilling process, from the fact that ground damage extends to about 1m in soil fill of reclamation land is generally many 2m about the following locations also flood or the like, I more than the total length of the degree more than 2m below 1 m It is only necessary to form it, and it is possible to efficiently excavate the deep foundation construction hole by, for example, a small backhoe without using a large heavy machine, and it is not necessary to carry out the excavating soil from the site. In the foundation construction method, in the floor excavation part formation process, the floor excavation surface of each deep foundation excavation hole is subjected to leveling, foundation stone laying or rolling to solidify the floor excavation surface. A floor excavation part is formed.

The foundation construction method is a deep foundation support floor body installation process in which a deep foundation support floor body manufactured as a precast product at a factory and brought into the field is aligned and installed on a floor excavation part. Basic construction method in a steel material standing step, steel material such as H-beams and I-steel, deep foundation support bed plate of bolted or welded to the lower end portion to the mounting portion of the fixing steel plates By connecting and fixing, the upper end portion is erected on the main surface of the deep foundation concrete member so that the upper end portion projects directly to the construction surface of the foundation portion forming region. Basic construction method, a process installation tubular stake member, for example, fume pipes are widely used as building materials, plastic tube, the tube stake member which had use a tubular member such as a steel pipe or void tube, deep foundation concrete from the top of the steel frame member by being inserted to the main surface of the parts, it takes 据 with painting a steel material by projecting the upper end portion from the upper end opening. In the foundation construction method, in the deep foundation construction hole backfilling step, the upper ends of the tubular pile member and the steel frame are exposed directly from the construction surface of the foundation forming region, and the deep foundation construction hole is backfilled. In the deep foundation construction hole backfilling process, backfilling is carried out using a well-mixed soil mixed with ground improvement material in the excavated soil, thereby reducing the time and cost of residual soil treatment and increasing the robustness of the improved ground. Make sure that ground formation takes place.

In the foundation construction method, the foundation concrete formwork is installed directly in the direct foundation formation area where the foundation reinforcement part is formed at a predetermined position through the above-described process, and the upper end of the steel frame is placed in the cavity of this direct foundation concrete formwork. The second rebar is placed in place. Basic construction method is to Da設the concrete spread foundation concrete form in, to form a spread foundation consisting of mat foundation and fabric basis by demolding the spread foundation concrete form through a predetermined curing period. In the basic construction method, concrete is Da設directly underlying concrete form in the by solidified flows into the interior space of the tubular stake member which constitutes the foundation reinforcement portion via the upper end opening of the tubular stake member A steel frame is held in the internal space, and a holding concrete part integrated directly with the foundation is formed. In the foundation construction method, a foundation reinforcement portion is formed in the direct foundation portion formation region, which is composed of a reinforcing pile body and a deep foundation support floor base body and directly reinforces the foundation.

  In the foundation construction method, a direct foundation composed of a cloth foundation or a solid foundation is formed by a direct foundation forming process that is generally performed on a direct foundation forming area. The direct foundation part forming process includes, for example, a direct foundation supporting floor part forming process, a moisture proof sheet laying process, a discarded concrete layer forming process, a solid foundation concrete form setting process, and a solid foundation reinforcement. Process, installation process of equipment piping, solid foundation concrete placement / curing process, cloth foundation concrete formwork installation process, cloth foundation placement process, cloth foundation concrete placing / curing process , Having a finishing process.

  In the direct foundation forming process, in the formation process of the direct foundation support floor board part, the backfill part of the deep foundation work hole described above is fully rolled and leveled, and then the entire direct foundation forming area including this backfill part is formed. A flat direct foundation support floor is formed by rolling and solidifying the crushed foundation crushed stone. The direct foundation formation process forms the foundation support floorboard directly in the construction area of the entire building when forming a solid foundation, and forms a fabric foundation of an appropriate shape when only the fabric foundation is formed. You may make it a foundation support floor base part be directly formed in an area | region. In the direct foundation portion forming step, the moisture-proof sheet is laid directly on the upper layer of the foundation-supporting floor board as necessary in the moisture-proof sheet laying step. In the direct foundation part forming step, in the forming step of the discarded concrete layer, the discarded concrete is placed with a predetermined thickness on the moisture-proof sheet. In the direct foundation portion forming step, a curing process for holding the opening is performed on the above-described cylindrical pile members of the reinforcing pile bodies in the moisture proof sheet laying step and the discarded concrete layer forming step.

  In the direct foundation part forming step, a solid foundation concrete form having a cavity of a predetermined shape is assembled on the discarded concrete layer so as to surround the direct foundation forming region in the step of installing the solid foundation concrete form. In the direct foundation portion forming process, in the solid foundation reinforcement process, the vertical and horizontal bars are arranged in a predetermined shape in the cavity of the solid foundation concrete formwork. In the solid foundation reinforcement process, the reinforcing bar fixed to the upper end of the steel member of each reinforcing pile body is fixed by welding with the opposing vertical and horizontal bars. Further, in the solid foundation reinforcement step, a vibration-proof tailing anchor bolt or the like is erected at a necessary portion by welding the lower end portion to the vertical or horizontal reinforcement.

  In the direct foundation forming process, in the installation process of equipment piping and the like, various pipes that are drawn into the foundation from the outside are installed in the cavity of the solid foundation concrete formwork. In the direct foundation formation process, in the solid foundation concrete placing and curing process, concrete is placed in the cavity of the solid foundation concrete formwork, and after a predetermined curing period, the solid foundation concrete formwork is removed. Form a solid foundation. In the direct foundation part forming process, in the solid foundation concrete placing and curing process, the cylindrical pile members of each reinforcing pile body are installed facing the opening in the cavity of the solid foundation concrete formwork. Part of the provided concrete flows from the upper end opening into the internal space of the tubular pile member. Therefore, a direct foundation part formation process forms a solid foundation in the interior space part of a cylindrical pile member simultaneously with a solid foundation formation process, and integrates a solid foundation and each reinforcement pile body.

  The direct foundation part forming step assembles and installs a fabric foundation concrete form having a cavity of a predetermined shape at a predetermined position of the solid foundation in the installation step of the cloth foundation concrete form. In the direct foundation portion forming process, in the cloth foundation arranging process, the vertical bars and the horizontal bars are arranged in a predetermined shape in the cavity of the cloth foundation concrete formwork. In addition, also in the reinforcement step of the fabric foundation, the incisor fixed to the upper end of the steel member of each reinforcing pile body is fixed by welding with the opposing vertical and horizontal bars, and at the necessary site, An anchor bolt or the like is erected with its lower end welded to the vertical and horizontal bars. In the direct foundation part forming process, the concrete is placed in the cavity of the cloth foundation concrete formwork in the placement and curing process of the cloth foundation concrete, and the cloth foundation concrete formwork is removed after a predetermined curing period. Form a fabric foundation.

In the direct foundation portion forming step, the level of the upper end portion of each fabric foundation is measured in the finishing step, and the height is adjusted by a leveler as necessary. Spread foundation portion forming step, after attaching the basic packing for each fabric foundation, is fixed the soil block by the anchor bolt, than a solid foundation a predetermined distance through the vibration trailing floating anchor bolts and floor beams foundation construction such as coupling the trailing and soil base that supports me is performed.

According to the present invention, a deep foundation support floor embedded in a deep foundation construction hole excavated with a depth of about 1 m to 2 m which does not require a large heavy machine at a predetermined location in the foundation formation region and exerts an anchoring action. The mechanical strength is extremely high by being composed of the board and the reinforced pile body that is integrated with the deep foundation support floor board body and is composed of a three-layer structure of steel frame, retaining concrete part and cylindrical pile member. In addition, the foundation is composed of a foundation reinforcement that is highly resistant to ground damage due to floods and the like and a direct foundation that is formed in the foundation formation area and supports the foundation. Therefore, according to the present invention, in the event of a disaster such as an earthquake or flood, the occurrence of basic damage is prevented, and the building is held firmly to prevent loss of valuable assets. According to the present invention, since the foundation reinforcement portion does not require large-scale construction using large heavy machinery, it can be constructed in a densely populated urban area or the like, and greatly contributes to the construction of an urban area with excellent disaster prevention characteristics. . According to the present invention, form the basis reinforcing portion at low cost by cheaper member costs and simple construction makes it possible to firmly reinforce the foundation.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Basic 1 shown as the embodiment, a spread foundation 4 consisting of mat foundation 6 for reinforcing the fabric foundation 5 and whole formed the basis formation region 2 supports the soil base 3 such as wooden houses, predetermined basic formation region 2 It consists of a deep foundation support floor base body 9 and a reinforcing pile body 10 embedded in a deep foundation construction hole 7 excavated at a position, and a plurality of foundation reinforcement portions 8 that directly reinforce the foundation 4. In the foundation 1, a large number of foundation reinforcing portions 8 that are directly integrated with the foundation 4 are formed in the foundation forming region 2 corresponding to the positions where the pillars are erected, for example, and are extremely resistant to earthquakes and floods. Configured as a highly resistant structure. The foundation 1 can be formed at a low cost without affecting neighboring buildings even in a narrow site such as an urban area where a house is built.

  As shown in FIG. 2, each foundation reinforcing portion 8 is formed in a foundation groove 12 excavated with a predetermined form and depth on a construction surface 11 of a foundation forming region 2 that is generally constructed conventionally. The cloth foundation 5 and the solid foundation 6 are integrated into a solid foundation 1 as a whole. Each foundation reinforcing portion 8 functions as a kind of pile foundation as will be described in detail later, but the deep foundation construction hole 7 excavated from the construction surface 11 to the foundation forming region 2 with a depth of, for example, 1 m to 2 m. And has a feature in that it is integrated with the fabric foundation 5 and the solid foundation 6 directly constituting the foundation 4. In addition, you may comprise each foundation reinforcement part 8 so that either the cloth foundation 5 or the solid foundation 6 may be integrated.

  As shown in FIGS. 1 and 2, each foundation reinforcing portion 8 is a deep foundation installed in a deep foundation construction hole 7 in which a deep foundation supporting floor base body 9 is excavated at a predetermined position in the foundation forming region 2. It is comprised from the concrete member 13 and the steel plate 14 for fixation provided integrally with this deep foundation concrete member 13. As shown in FIG. Each foundation reinforcing portion 8 is installed on a floor digging portion 15 formed by a deep foundation concrete member 13 on the floor digging surface of the deep foundation construction hole 7. Each foundation reinforcing portion 8 includes a steel pile 16 made of H steel or I steel, and a pile pile member 17 made of a cylindrical material or a square tube material. The cylindrical pile member 17 is constituted by a three-layer structure including a holding concrete portion 18 formed in the internal space portion 16a.

  The deep foundation construction hole 7 is preferably excavated with a depth to reach the original ground because the buried soil is generally less than about 2 m when the construction site is a creation site. There is no need to dig deeper. Further, the deep foundation construction hole 7 is preferably excavated with a depth exceeding 1 m because ground damage may reach up to about 1 m in a flood or the like. Therefore, the deep foundation construction hole 7 only needs to be excavated at a depth of about 1 m or more and 2 m or less, and can be sufficiently constructed by a small backhoe or the like without using a large heavy machine, and even in a narrow site. It is not necessary to take out the soil temporarily and store it.

  The floor digging portion 15 is formed to have a thickness of about 100 mm and an outside dimension of about 1 m square by applying a rolling process to the ground crushed stone spread on the floor digging surface of the deep foundation construction hole 7. The A deep foundation concrete member 13 constituting the deep foundation support floor base body 9 is installed in the floor excavation portion 15. As the deep foundation concrete member 13, for example, a precast product manufactured by embedding the fixing steel plate 14 integrally in a factory is used, and is carried into the site. The deep foundation concrete member 13 has a square shape of about 90 mm square that is slightly smaller than the outer dimension of the floor digging portion 15 and has a thickness of about 150 mm. In addition, the deep foundation concrete member 13 and the floor excavation part 15 are not limited to this shape dimension, and are suitably designed according to the state of a ground, the weight of a building, etc.

  In the deep foundation concrete member 13, a first reinforcing bar 19 is arranged by appropriately combining longitudinal bars and transverse bars in a cavity of a deep foundation concrete formwork, concrete is placed in the cavity, and a reinforced concrete is passed through a predetermined curing period. Formed as a product. In the deep foundation concrete member 13, after the step of arranging the first reinforcing bar 19, a pair of fixing steel plates 14 and 14 are arranged with a predetermined facing interval in the cavity, and the lower ends of the steel plates 14 and 14 are arranged at the first reinforcing bar 19. On the other hand, it is fixed by welding. The deep foundation concrete member 13 protrudes the upper part of each fixing steel plate 14 from the main surface with a predetermined height. Although details are omitted in the fixing steel plates 14 and 14, a plurality of mounting holes are formed to be spaced apart from each other in the width direction and the height direction.

  In addition, about the steel plate 14 for fixation, you may make it use many so-called incision bars bent in the L shape which respectively consists of a horizontal site | part and a standing part. The incisor is fixed to the first rebar 19 by wire or welding so that the rising portion is arranged on the same circumference surrounding the center of the deep foundation concrete member 13.

  A steel frame 16 is fixed on the deep foundation support floor body 9 on the deep foundation concrete member 13 using the fixing steel plate 14 described above. For the steel frame 16, for example, a 250 × 250 H-shaped steel material that is widely used as a building material is cut into a total length of 1 m to 2 m. Each steel frame 16 is leaned so that the lower end portion is fitted to the fixing steel plates 14 and 14 so that the standing wall portions are overlapped with each other. Although not described in detail, a plurality of mounting holes are formed in the steel frame 16 so as to be spaced apart from each other in the width direction and the height direction. Each steel frame 16 is combined with the fixing steel plates 14 and 14 so that their respective mounting holes are located on the same axis, and is fixed to the fixing steel plate 14 with through bolts 14a and nuts 14b. It is erected on the foundation concrete member 13. Since each steel frame 16 has the above-mentioned full length, it is erected on the deep foundation concrete member 13 so that each upper end portion is positioned at a height protruding from the opening portion of the deep foundation construction hole 7. Each steel frame 16 is fixed to each reinforcing bar by welding when the reinforcing bar is used as a fixing member for the deep foundation concrete member 13.

  A large number of first reinforcing bars 20 are fixed to each steel frame 16 by welding. Each first insertion bar 20 is fixed to the steel frame 16 so as to protrude from the upper end portion thereof, and after the cylindrical pile member 17 described later is combined with the steel frame material 16, the protruding portion is bent in the horizontal direction. The Each steel frame 16 is accommodated in the internal space 17a of the cylindrical pile member 17 installed on the deep foundation concrete member 13. The cylindrical pile member 17 is generally used as a building material and has a diameter of about 150 mm to 1350 mm, such as a fume tube, a vinyl tube, a steel tube, or a void tube, which is sufficient to allow the steel frame 16 to penetrate. Used. The cylindrical pile member 17 is installed on the deep foundation concrete member 13 by being inserted from the upper end side with respect to the steel frame 16 standing on the deep foundation concrete member 13. In addition, the cylindrical pile member 17 is comprised so that it may become self-supporting on the deep foundation concrete member 13 by making a lower end part into a slightly thick large diameter as shown in FIG.

  The deep foundation construction hole 7 is backfilled with backfilling soil in a state where the cylindrical pile member 17 is held vertically by an appropriate jig. The deep foundation construction hole 7 is filled so that the upper end portion of the cylindrical pile member 17 protrudes slightly from the construction surface 11 and the soil is thrown in. Each foundation reinforcement portion 8 is buried in the predetermined position of the foundation forming region 2 by exposing the upper end portion of the tubular pile member 17 by backfilling the deep foundation construction hole 7. In each foundation reinforcing portion 8, the upper end portion of the steel frame 16 and the first insertion bar 20 are exposed from the upper end opening of the cylindrical pile member 17.

  In addition, as for each foundation reinforcement part 8, the holding concrete part 18 is formed by being simultaneously filled with the concrete which directly forms the foundation 4 in the internal space part 17a of the cylindrical pile member 17 so that it may mention later. In addition, each foundation reinforcement part 8 is formed in a factory etc. as a precast product, for example, and when carrying in and installing in the field, the holding concrete part 18 is previously formed in the internal space part 17a of the cylinder pile member 17. .

  In the foundation formation region 2, the foundation formation surface is directly formed by subjecting the backfill portion of the deep foundation construction hole 7 described above to sufficient rolling and leveling to form a foundation groove 12. Is excavated. The foundation groove 12 is formed for the construction area of the entire building when the direct foundation 4 is constituted by the cloth foundation 5 and the solid foundation 6, and when it is constituted only by the cloth foundation 5, it has a predetermined shape. Formed in the fabric foundation forming region. In the foundation groove 12, a direct foundation support floor board portion 21 having a thickness of about 100 mm is formed on the floor digging surface. Note that the foundation groove 12 is not limited to the shape and dimensions described above for the direct foundation support floor 21 but is of course appropriately designed according to the state of the ground, the weight of the building, and the like. Since the foundation foundation 12 is formed by integrating the foundation 4 directly with the above-described many foundation reinforcements 8, the foundation groove 12 directly places the foundation support floor 21 in a position slightly shallower than the conventional foundation groove and It is also possible to form it thinly.

  A moisture-proof sheet 22 made of a synthetic resin sheet that has been conventionally used is laid on the surface of the direct foundation support floor 21 over the entire area. The moisture-proof sheet 22 is laid at a depth of about 700 mm from the construction surface 11 over the entire foundation forming region 2 to block moisture under the building floor, prevent damage such as termites, or invade the roots of small animals and trees. Functions such as prevention. The moisture-proof sheet 22 also has a function of directly covering the foundation support floor board portion 21 and suppressing the direct foundation support floor board portion 21 from being washed away and damaged during a flood or the like.

  In the direct foundation support floor 21, a discarded concrete layer 23 is formed on the surface or on the moisture-proof sheet 22. The discarded concrete layer 23 is a solid concrete layer having a thickness of about 50 mm, and is formed after a predetermined curing period after the concrete is cast and the surface is smoothed. The discarded concrete layer 23 directly protects the foundation supporting floor board 21 and the moisture-proof sheet 22 and improves the mechanical strength of the foundation portion of the foundation 1. In the foundation 1, the discarded concrete layer 23 and the solid foundation 6 have been described as separate. However, the discarded concrete layer 23 may constitute the solid foundation 6. The vertical and horizontal bars are laid out.

  A solid foundation concrete form for forming the solid foundation 6 is installed in the direct foundation support floor board portion 21 over the entire area where the foundation 1 is formed. Although the details are omitted, the solid foundation concrete form is provided with the second reinforcing bars 24 by appropriately combining the vertical bars and the horizontal bars in the cavity. In addition, in the solid foundation concrete formwork, pipes such as electric pipes, water pipes, and sewage pipes piped under the floor, and other buried facilities are appropriately installed so as to be drawn out of the foundation 1. In the solid foundation concrete formwork, a lower end portion is fixed to each reinforcing bar, and a large number of seismic tail-lifting anchor bolts 25 are erected in the cavity.

  In the solid foundation concrete formwork, the above-mentioned reinforcing pile body 10 is arranged at a predetermined position in the cavity so that the upper end portion faces. In the reinforcing pile body 10, the steel frame 16 protrudes with a predetermined height from the upper end of the cylindrical pile member 17, and the first rebar 20 fixed to the steel frame 16 has a solid foundation concrete form side. The second rebar 24 is fixed with a wire or welding. The solid foundation concrete form is casted with concrete in a cavity, and is demolded after a predetermined curing period. For example, the depth from the construction surface 11 is about 100 mm, and the height from the construction surface 11 is about 50 mm. A solid base 6 of a degree is formed. The solid foundation 6 is not limited to such a specification, and is formed with an appropriate dimensional specification depending on the state of the ground.

  In the solid foundation concrete formwork, as described above, the cylindrical pile member 17 of each reinforcing pile body 10 is provided in the cavity with its upper end opening facing. When the concrete cast in the cavity reaches the height exceeding the upper end opening, the pipe pile member 17 flows into the internal space 17a. The cylinder pile member 17 forms the holding concrete part 18 which used the steel frame 16 as a core material, when the concrete which flowed into the internal space part 17a through the predetermined curing period solidifies. Each reinforcing pile body 10 includes a cylindrical pile member 17 constituting a formwork member, and a holding concrete portion 18 integrated with a deep foundation concrete member 13 via a steel frame 16 and a fixing steel plate 14 at a lower end portion. It is formed. Each reinforcing pile body 10 is formed with a holding concrete portion 18 integrated with the solid foundation 6 via the steel frame 16, the first reinforcing bar 20 and the second reinforcing bar 24.

  The solid foundation 6 is provided with a cloth foundation concrete form for forming the cloth foundation 5 at a predetermined position. In the cloth foundation concrete formwork, the third reinforcing bar 26 is appropriately arranged by being fixed to the second reinforcing bar 24 protruding from the surface of the solid foundation 6 by wire or welding in the cavity. A large number of anchor bolts 27 are erected at predetermined intervals on the cloth foundation concrete form, which are fixed to the third rebar 26 by welding. Each anchor bolt 27 has a length that protrudes from the upper end of the formed fabric base 5, and the lower end portion is bent in the horizontal direction so as to be firmly retained in the fabric base 5 and the fabric. An outer peripheral screw is formed at a portion protruding from the foundation 5. In the cloth foundation concrete formwork, concrete is cast in the cavity, and the mold foundation 5 having a height from the construction surface 11 of about 400 mm or more is formed by demolding after a predetermined curing period.

  In addition, although the direct foundation 4 formed the solid foundation 6 as mentioned above and assembled the cloth foundation concrete formwork to form the cloth foundation 5, the cloth foundation 5 and the solid foundation 6 depend on the specifications of the foundation 1. Of course, it is also possible to form these simultaneously.

  As described above, each foundation reinforcing portion 8 includes a steel frame 16, a holding concrete portion 18, a cylinder, and a deep foundation concrete member 13 constituting the deep foundation support floor body 9 having a relatively large area embedded in the ground. The reinforcement pile body 10 which consists of a three-layer structure with the pile member 17 is standingly comprised, and is comprised. Each foundation reinforcing portion 8 forms a foundation 1 by integrating a reinforcing pile body 10 on a construction surface 11 and directly with a fabric foundation 5 or a solid foundation 6 constituting the foundation 4. Each foundation reinforcing portion 8 has a large mechanical rigidity with respect to the force in the horizontal direction and the drawing direction due to the anchoring action of the deep foundation concrete member 13 and the three-layer structure of the reinforcing pile body 10, and the fabric foundation 5 and the solid foundation. Hold the foundation 6.

  Therefore, the foundation 1 firmly holds the building against earth pressure and the weight of the building, and firmly holds the building against a large force in the horizontal direction and the pulling-out direction applied in the event of an earthquake or flood. The foundation 1 has a deep foundation concrete member 13 of the deep foundation support floor 9 that is deeper than 1 m from the construction surface 11. Support to prevent collapse. The foundation 1 is a relatively inexpensive material that is widely used as a building material for the steel pile 16 and the cylindrical pile member 17 that form the reinforcing pile body 10 while forming the deep foundation construction hole 7 at a predetermined position in the foundation forming region 2 with a small device. Since the member is used and the holding concrete portion 18 is formed using the cylindrical pile member 17 as a formwork, simple work and cost reduction of the member cost can be achieved.

As shown in FIG. 2, the foundation 1 is embedded with seismic tail-lifting anchor bolts 25 at appropriate positions on the solid foundation 6 with the same height as the anchor bolts 27 on the fabric foundation 5 side. In the foundation 1, the height of each cloth foundation 5 is measured, and the leveler 28 is poured into the upper end surface of the cloth foundation 5 necessary for leveling the whole with a predetermined thickness. The basic 1, together with basic packing 29 over the entire length on the upper end surface of the fabric foundation 5 is incorporated mat, soil table 3 is secured by anchor bolts 27 on the basis packing 29.

In addition, on the foundation 1, a large number of floor bundles 30 are erected at appropriate positions on the solid foundation 6, and the tailings 31 are installed over the floor bundles 30. Each trailing 31 by seismic trailing floating anchor bolt 25 is fixed a solid foundation 6, it is fixed to the soil base 3 by an appropriate tenon structure or the like. Note that the foundation structure is not limited to such a structure, and it is needless to say that the foundation structure may be constituted by various foundation structures that are generally constructed conventionally. In the base structure, a building is built on top of it.

  The construction process of the foundation 1 described above will be described with reference to FIG. The construction process of the foundation 1 is a deep foundation construction hole excavation process in which the deep foundation construction hole 7 having a depth described above is excavated by a device such as a backhoe at a predetermined position of the territory foundation formation region 2. In the construction process of the foundation 1, the floor digging part forming process for forming the floor digging part 15 on the floor digging surface of each deep foundation construction hole 7 is a second process. In the floor excavation part forming step, with the floor excavation surface of the deep foundation construction hole 7 being leveled, the ground soil is mixed with the ground improvement material and the well-mixed soil is added. In the floor excavation portion forming step, the above-mentioned floor excavation portion 15 is formed by laying the foundation crushed stone in a state where the filling soil is subjected to leveling processing or rolling pressure treatment to form a flat surface, and further subjected to rolling pressure treatment. To do.

  The foundation 1 is constructed by installing a deep foundation support floor 9 in which a deep foundation concrete member 13 and a fixing steel plate 14 are integrated on the floor digging portion 15 of each deep foundation construction hole 7. The board installation process is defined as the third process. The construction process of the foundation 1 is a fourth process that is a steel frame erecting process in which the steel frame 16 is erected on the main surface of the deep foundation concrete member 13 through the fixing steel plate 14. In the steel frame standing step, the H steel material having the above-mentioned dimensions is stood between the fixing steel plates 14 and 14, and the deep steel concrete member is welded to the lower end portion of the H steel material and the rising portion of the fixing steel plate 14. The steel frame 16 is erected on the main surface 13. In addition, in the steel frame erection process, each steel frame 16 has the above-described dimensions and is not very heavy, so that the crane or the like is not required and the installation and fixing steel plates 14 can be manually performed by an operator. It is possible to perform welding.

  In the construction process of the foundation 1, a first rebar fixing process for fixing a plurality of first rebars 20 by welding to the upper end portion of the steel frame 16 is a fifth process. In the construction process of the foundation 1, a cylinder pile member installation process in which the steel frame 16 is housed in the internal space portion 17a and the cylinder pile member 17 is installed on the main surface of the deep foundation concrete member 13 is defined as a sixth process. In the tubular pile member installation step, the tubular pile member 17 is installed on the main surface of the deep foundation concrete member 13 by inserting the tubular pile member 17 from the upper end side of the steel frame 16 as described above. In the cylinder pile member installation process, since the cylinder pile member 17 is not so heavy due to its dimensional shape and material characteristics, an operator can easily handle it without using a crane or the like.

  The foundation 1 construction process is a deep foundation construction hole backfilling process in which backfilling soil is introduced into the deep foundation construction hole 7 in a state in which the cylindrical pile member 17 is held vertically to perform backfilling. The deep foundation construction hole backfilling process uses excavated soil and is mixed with ground improvement material and sufficiently agitated soil is used so that the upper end of the cylindrical pile member 17 protrudes slightly from the construction surface 11. Input and backfill. In the deep foundation construction hole backfilling step, sufficient filling pressure treatment is applied to the buried soil so as not to cause subsidence or inclination of the tubular pile member 17. Since the foundation 1 construction process does not require much time from the excavation of the deep foundation construction hole 7 to the backfilling, in the unlikely event of raining, the rainwater collected in the deep foundation construction hole 7 can be removed or dried. Does not require a period.

  The foundation 1 construction process involves digging up at a predetermined depth using, for example, a backhoe, etc. over the entire area of the foundation formation region 2 including the backfill site, and mixing the ground improvement material into the excavated soil at the digging site. The ground improvement process in which the ground is improved by throwing in the buried soil and performing the leveling process and the rolling process is defined as an eighth process. In addition, about the ground improvement process, it is made to aim at the depth of about 70 cm from the construction surface 11 to stabilize the ground and promote the hardening phenomenon of the entire ground. In the case of the above-mentioned strong ground, it is not necessary to carry out so much depth.

  The construction process for the foundation 1 is a ninth foundation process in which the foundation groove 12 is excavated on the improved ground and the foundation support floor 21 is directly formed at the bottom of the foundation groove 12. In the direct foundation support floor board portion forming step, the floor foundation surface of the foundation groove 12 is subjected to a straightening process and a rolling compaction process, and further, the ground crushed stone is laid down and the rolling compaction process is performed to directly apply the foundation support floor board part 21. Form. In the construction process of the foundation 1, the moisture-proof sheet laying process of laying the moisture-proof sheet 22 over the entire area directly on the foundation support floor 21 is defined as the tenth process. In the moisture-proof sheet laying step, the moisture-proof sheet 22 is formed at a depth of about 70 cm from the construction surface 11 so that a factory such as moisture-proof, insect-proof or run-off resistance can be achieved as described above.

  In the construction process of the foundation 1, the discarded concrete layer forming process for forming the discarded concrete layer 23 on the moisture-proof sheet 22 is an eleventh process. The discarded concrete layer forming step is performed as necessary, and is formed directly on the foundation support floor board 21 when the moisture-proof sheet 22 is not laid. The construction process of the foundation 1 is a solid foundation concrete formwork installation process in which a solid foundation concrete form is assembled and installed on the discarded concrete layer 23 as a twelfth process. In the solid foundation concrete form installation step, the above-described cylindrical pile members 17 of the foundation reinforcement portions 8 are respectively faced in the cavities so that the foundation concrete form is directly assembled in the foundation groove 12.

  The construction process of the foundation 1 is a solid foundation reinforcement process in which the second reinforcing bars 24 are arranged by appropriately combining the vertical bars and the horizontal bars in the cavity of the solid foundation concrete formwork as the thirteenth process. In the solid foundation reinforcement process, the first reinforcing bar 20 and the second reinforcing bar 24 of the reinforced pile body 10 facing the cavity of the solid foundation concrete formwork are fixed, and a number of seismic tail-lifting anchors are installed. An operation of standing the bolt 25 is also performed. The construction process of foundation 1 is the 14th process of installing equipment pipes such as electric pipes, water pipes, sewage pipes and other buried equipment drawn out from under the floor in the cavity of the solid foundation concrete formwork. And

  In the construction process of the foundation 1, a solid foundation concrete placing process in which concrete is placed in the cavity of the solid foundation concrete form is defined as a fifteenth process. In the solid foundation concrete placing process, the concrete is cast to the full height in the cavity of the solid foundation concrete formwork, and sufficient vibration treatment is applied so that the concrete flows into every corner, and the surface is applied with a metal lever. The top edge is smoothed to make it flat. In the solid foundation concrete placing process, as described above, the cylinder pile member 17 of each reinforcing pile body 10 is provided in the cavity of the solid foundation concrete form with its upper end opening facing. The placed concrete is allowed to flow into the internal space 17a of the pile member 17 as well.

  In the solid foundation concrete placing process, the solid foundation 6 is formed by removing the solid foundation concrete formwork after a predetermined curing period. In the solid foundation concrete placing step, the concrete flowing into the internal space portion 17a of the cylindrical pile member 17 is also solidified to form a holding concrete portion 18 having the steel frame 16 as a core material. In the solid foundation concrete placing step, the tubular pile member 17 constitutes a formwork member, and the reinforcing pile body 10 composed of a three-layer structure of the steel frame 16, the tubular pile member 17, and the holding concrete portion 18 is formed. . In the solid foundation concrete placing step, the solid foundation 6 integrated with the deep foundation concrete member 13 is formed via the reinforcing pile body 10. In the solid foundation concrete placing step, an operation of filling the gap created between the foundation formation region 2 by removing the solid foundation concrete form is also performed.

  The construction process of the foundation 1 is a cloth foundation concrete form installation process in which a cloth foundation concrete form is assembled and installed on the solid foundation 6 as a sixteenth process. The construction process of the foundation 1 is a cloth foundation reinforcing process in which the third reinforcing bars 26 are arranged by appropriately combining the vertical bars and the horizontal bars in the cavity of the cloth foundation concrete formwork as the seventeenth process. In the cloth foundation reinforcing step, an operation of fixing the anchor bolt 27 to the third reinforcing bar 26 is also performed. In the construction process of the foundation 1, the cloth foundation concrete placing process for placing concrete in the cavity of the cloth foundation concrete form is defined as the 18th process. In the cloth foundation concrete placing process, sufficient vibration processing is performed so that the concrete flows into every corner, and the top edge leveling process is performed to make the surface flat with a metal lever. In the cloth foundation concrete placing step, the cloth foundation 5 integrated with the solid foundation 6 is formed by removing the cloth foundation concrete form after a predetermined curing period.

  The construction process of the foundation 1 is a 19th process in which a predetermined finishing process is performed on the cloth foundation 5 and the solid foundation 6 formed through the above-described processes. The finishing step includes a leveling operation for measuring the height of each fabric foundation 5 and forming a leveler 28 having a predetermined thickness to adjust the entire level. In the finishing step, the foundation packing 29 is laid over the entire upper end surface of each horizontally adjusted fabric foundation 5.

More underlying 1 formed through the steps, each on a fabric foundation 5 via the underlying packing 29 by placing the soil table 3, firmly by anchor bolts 27 provided upright drives out predetermined interval Sat board flooring and work to fix is performed. A large number of floor bundles 30 are erected on the foundation 1 at appropriate positions on the solid foundation 6, and tailings 31 are installed on these floor bundles 30 and the tailings 31 are levitated to the seismic resistance. operation of fixing the soil table 3 is carried out by an appropriate tenon structure such as by anchor bolts 25 to secure a solid foundation 6 by a predetermined height. On the foundation 1, a building is built on the base 3 and the tail 31.

  In the foundation 1 construction process, a deep foundation support floor base body 9 installed in a deep foundation construction hole 7 of a predetermined depth excavated at a predetermined position in the foundation formation region 2, a steel frame 16, a retaining concrete portion 18, and a cylinder A plurality of foundation reinforcing portions 8 are formed by integrating the reinforcing pile body 10 composed of a three-layer structure with the pile member 17, and a direct foundation 4 including a fabric foundation 5 and a solid foundation 6 is formed on these foundation reinforcing portions 8. An integrated foundation 1 is formed. In the foundation 1 construction process, the deep foundation support floor 9 is installed at a depth where it is hardly washed away even in a large flood, and the anchor 4 is strengthened directly through the reinforcing pile 10 with an anchor action. A supporting base 1 is formed. In the construction process of the foundation 1, the foundation 1 that directly supports the foundation 4 directly is formed through the reinforcing pile body 10 made of a three-layer structure having a large mechanical rigidity with respect to the force in the horizontal direction or the drawing direction. .

  In the foundation 1 construction process, the deep foundation support flooring 9 that performs the same function as a pile foundation that has been formed by large-scale heavy machinery and large-scale construction as a foundation structure of a large-scale building is not required. It is formed by a very simple process in the deep foundation construction hole 7 excavated by the backhoe. In the construction process of the foundation 1, it is possible to form the foundation 1 by reducing the cost by simple construction and inexpensive members. Moreover, in the construction process of the foundation 1, excavation soil processing is easy, and it is possible to shorten the construction period and form a strong foundation 1 even in an urban area or the like.

  In the construction process of the foundation 1, as described above, the foundation reinforcing portion 8 is formed of a three-layer structure including a steel frame 16, a holding concrete portion 18, and a cylindrical pile member 17 on a deep foundation support floor base body 9 of a precast product. The reinforcing pile body 10 is integrated. In the construction process of the foundation 1, as described above, construction efficiency is achieved by performing from deep excavation hole 7 to backfilling in a short time. In the foundation 1 construction process, the deep foundation support floor 9 has a certain weight and size, so it can be installed in the deep foundation construction hole 7 using a small crane mounted on a truck. Is done. In the construction process of the foundation 1, in the case of a remote site, a certain period of time is required from the arrangement of the deep foundation support floor body 9 to the delivery.

  In the construction process of the foundation 1, for example, when the deep foundation concrete member 13 having different outer dimensions and thickness dimensions is required for each deep foundation construction hole 7 depending on the situation at the site, the second construction process shown in FIG. The deep foundation support floor base body 9 may be formed in the deep foundation construction hole 7 excavated by the on-site construction. In addition, this 2nd construction process differs in a series of processes which form the deep foundation support floor base body 9 with respect to the 1st construction process mentioned above. Therefore, in the following 2nd construction process, only the 2-3 process thru | or the 2-6 process which is the formation process of the deep foundation support flooring body 9 which is the characteristic is demonstrated.

  The second construction process is a deep foundation concrete form installation process in which a deep foundation concrete formwork having a predetermined shape cavity is assembled and installed on the floor excavation part 15 of each deep foundation construction hole 7. Let it be a process. A 2nd construction process makes the 2nd-4 process the 1st reinforcement reinforcement process which arranges the 1st reinforcement 19 by combining a transverse reinforcement and a longitudinal reinforcement in the cavity of a deep foundation concrete formwork. A 2nd construction process makes the incisor fixing process which fixes an incisor with respect to the 1st reinforcing bar 19 2nd process. Of course, in the second construction step, the above-described fixing steel plate 14 may be fixed instead of the reinforcing bar.

  The second construction step corresponds to the above-described deep foundation concrete member 13 by placing concrete in the cavity of the deep foundation concrete formwork and demolding the deep foundation concrete formwork after a predetermined curing period. The deep foundation concrete part formation process which forms a deep foundation concrete part is set as the 2-6 process. The deep foundation concrete portion is formed by projecting the upper end portion of each incision bar from the main surface. In the second construction process, the steel frame standing process for standing the steel frame 16 in the deep foundation concrete part is referred to as a second to seventh process. In the steel frame erection process, the steel material 16 is erected on the deep foundation concrete part by standing the H steel material at the center of each reinforcing bar and welding the lower end part of this H steel material and the rising part of each reinforcing bar. Set up. The second construction process includes a fifth bar insertion fixing process for fixing the first reinforcing bar 20 to the upper end portion of the steel material 16 in the first construction process described above, a cylinder pile member installation process in the sixth process, and the like. The foundation 1 is formed by performing the above process.

  In addition, in the construction process of the foundation 1, the construction method of the direct foundation 4 composed of the cloth foundation 5 and the solid foundation 6 that has been generally performed has been described. However, an appropriate process or sequence using the construction process as a basic specification. Of course, the foundation 1 may be formed.

It is a partially notched principal part top view which shows the basic site | part of the wooden house using the deep foundation concerning this invention. It is a principal part longitudinal cross-sectional view of the basic part. It is process drawing of the basic construction process. It is process drawing of another foundation construction process.

Explanation of symbols

1 basic, 2 basic formation region, 3 soil base, 4 spread foundation, 5 fabric foundation, 6 mat foundation, 7 deep foundation construction holes, 8 foundation reinforcement portion, 9 deep foundation support bed plate member, 10 reinforcing pile body, 11 construction Surface, 12 foundation groove, 13 deep foundation concrete member, 14 steel plate for fixing, 15 floor digging part, 16 steel frame, 17 cylinder pile member, 18 holding concrete part, 19 1st reinforcing bar, 20 1st reinforcing bar, 21 direct foundation support Floor part, 22 Moisture-proof sheet, 23 Discarded concrete layer, 24 Second rebar, 25 Anti-seismic tail lift anchor bolt, 26 Third rebar, 27 anchor bolt, 28 Leveler, 29 Foundation packing, 30 Floor bundle, 31 Trailing

Claims (2)

A deep foundation concrete member made of reinforced concrete with a first reinforcing bar inside, and a mounting portion provided with a plurality of mounting holes projecting from the main surface of the deep foundation concrete member, and the base end portion of the deep foundation is a stationary steel plate made integral to the concrete member, is placed on a floor Homem direct foundation formation depth basis construction in holes drilled drives out below a depth of 1m or 2m at a predetermined position in the region Deep foundation support flooring for precast concrete products ,
A steel frame material standing on the main surface of the deep foundation concrete member by connecting and fixing the lower end portion to the mounting portion of the fixing steel plate, and projecting the upper end portion directly to the construction surface of the foundation forming region, A tubular pile member that stands up on the main surface of the above-mentioned deep foundation concrete member by projecting the upper end portion of the steel frame from the upper opening and storing it in the internal space portion, and filling the internal space portion of this tubular pile member with concrete A reinforcing pile body formed of a three-layer structure of a holding concrete part that is formed and holds the steel frame ,
The upper end of the reinforcing pile body, which is embedded in the deep foundation construction hole by integrating the lower end portion of the steel frame on the deep foundation support floor body and protruded to the construction surface of the direct foundation forming area By fixing the second reinforcing bar to the part and integrating with the direct foundation directly formed in the direct foundation forming region via the second reinforcing bar, the direct foundation and the deep foundation supporting floor body are directly integrated. basic reinforcement device which is characterized in that turned into by reinforced. The above-mentioned deep foundation includes a mounting portion in which a plurality of mounting holes are provided in a deep foundation concrete member, which is embedded in a deep foundation construction hole excavated directly in the foundation forming area, and in which a first reinforcing bar is arranged. A deep foundation supporting floor base body of a precast concrete product, which is made of a steel plate for fixing integrated with the above deep foundation concrete member by projecting from the main surface of the concrete member ;
A steel frame material standing on the main surface of the deep foundation concrete member by connecting and fixing the lower end portion to the mounting portion of the fixing steel plate, and projecting the upper end portion directly to the construction surface of the foundation forming region, A tubular pile member that stands up on the main surface of the above-mentioned deep foundation concrete member by projecting the upper end portion of the steel frame from the upper opening and storing it in the internal space portion, and filling the internal space portion of this tubular pile member with concrete Forming a three-layer structure composed of a holding concrete portion that holds the steel frame and forming a foundation reinforcing portion with a reinforcing pile body standing on the deep foundation supporting floor body,
The foundation reinforcing part directly integrates the direct foundation formed in the direct foundation forming area by fixing the second reinforcing bar to the upper end portion of the steel frame and the deep foundation supporting floor base body via the reinforcing pile body. is a method of constructing the foundation formed by reinforcing Te,
The construction process of the foundation reinforcement is
A deep foundation construction hole excavation step of excavating a deep foundation construction hole at a predetermined position in the direct foundation formation region with a depth of 1 m or more and 2 m or less ;
For the floor digging surface of each of the above-mentioned deep foundation construction holes, floor digging part forming step that forms a floor digging part by performing leveling and foundation stone laying or rolling and solidifying,
A deep foundation support floor body installation step of installing the deep foundation support floor body on the floor excavation part;
The mounting portion of the fixed steel sheet for the deep foundation support bed plate body, mainly the upper end is protruded to the construction surface of the spread foundation portion formation region of the deep foundation concrete member by connecting and fixing a lower end portion A steel frame erecting step for erecting the steel frame on the surface;
A step mounting tubular stake member mounting the said tubular stake member on the main surface of the deep foundation concrete portion is protruded to the upper end portion from the upper end opening is accommodated in the internal space of the steel material,
A deep foundation construction hole backfilling step for exposing the upper end portion of the cylindrical pile member and the steel frame and performing the backfilling of the deep foundation construction hole;
A second reinforcing bar arranged in a cavity of a direct foundation concrete form installed in the direct foundation forming area is fixed to the upper end portion of the steel frame, and is placed in the direct foundation concrete form and directly concrete that forms the basis via the upper end opening is filled in the internal space of the tubular stake member to the spread foundation by forming the holding concrete portion via the reinforcing pile body the deep foundation support floor panel member A foundation construction method characterized in that it is formed integrally .

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