JP2007303073A - Underground beam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily constitute an underground beam in a stable state by eliminating a form structure of a temporary form, a permanent form, or the like, and providing an excavated mountain face with a wire mesh like material for a sheathing board allowance. <P>SOLUTION: The underground beam integrally provided at a mat foundation 11 is constituted to comprise the wire mesh like material 33 for a sheathing board allowance provided to extend along a bottom face 22a and a side face 22b in an elongate recess 22, and reinforcements 40 arranged inside the wire mesh like material 33 for the sheathing board allowance, and to dam concrete 50 placed between the wire mesh like materials 33, 33 for the sheathing board allowance, by the wire mesh like material 33 for the sheathing board allowance and the bottom face 22a and side face 22b of the elongate recess 22 along which the wire mesh like material 33 for the sheathing board allowance is extended, to cure and harden the concrete 50. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to provision of an underground beam that can easily and firmly constitute an underground beam integrally provided on the solid foundation under the solid foundation.

  When constructing a structure, a concrete foundation having a required strength such as rigidity that can be adapted to the constructed structure is required.

  The concrete foundation installed in the construction of such a structure such as a house shall have a predetermined rigidity, etc., comprehensively considering the ground characteristics of the structure, the structural characteristics of the structure to be constructed, the construction method, etc. It is comprised as provided with.

  From this point, when the concrete foundation is a solid foundation, attempts have been made to cope by increasing the thickness of the foundation slab, increasing the amount of reinforcing bars, and increasing the bending strength of the reinforced concrete.

  In addition, in order to increase the moment of inertia of the cross section against bending, an attempt was made to increase the rise of the foundation constructed with a solid foundation so that the rise portion passes through the long side direction and the short side direction. ing.

  However, in the method of increasing the thickness of the foundation slab more than necessary and increasing the amount of reinforcing bars to increase the bending strength of the reinforced concrete, there is a problem that the construction cost of the foundation is expensive. In addition, even with such a solid foundation, even if the rigidity of the solid foundation itself is increased, the structure may be subsidized, and it may be difficult to control the lift-up by injecting a chemical solution corresponding to such a subsidence. there were.

  In addition, in the method of increasing the rising width of a foundation constructed with such a solid foundation, it is often difficult to maintain the street of the rising section due to the convenience of underfloor ventilation and traffic conditions. However, it is difficult to provide a rising in an ideal shape of a rice field, and it is difficult to bring the intended strength to the base part, and the rising part is thick and high, resulting in the appearance of a feeling of pressure.

  From this point, a concrete foundation having a solid foundation with an underground beam has been proposed (for example, Patent Document 1).

JP 9-158201 A

  In this patent document 1, after the root cutting is completed, the square wave steel plate is made such that the wave crests are continuous in the horizontal direction, and the upper and lower portions thereof are reinforced with light grooved steel. Assembling as a formwork material, using this formwork material as earth retaining material, backfilling the outside, arranging the inside of the formwork material, placing concrete, and disclosing the foundation construction method of the building is doing.

  In such a basic construction method of a building, the demolding process of the formwork can be omitted, and it has the feature that the overexcavated part of the digging can be backfilled after the assembly of the square wave steel plate, and the overexcavated part is used. As a result, there is a feature that the assembling of the temporary mold form of the concrete, the placing of the concrete, the curing, and the demolding work are unnecessary.

  However, in such a foundation method, it is necessary to excavate the ground for constructing underground beams in the construction ground part of the structure, and the excavated soil of the surplus part to be backfilled is close to the foundation work site. In addition, it was necessary to carry out and carry out the excavated soil in this surplus portion.

  In addition, in such a basic construction method, it is necessary to form a die assembly using a square wave steel plate in the excavated portion where surplus excavation has been performed, and after the mold assembly, it is necessary to refill the surplus portion, which is complicated in a narrow work space. There was a problem that forced me to work.

  Furthermore, in such a foundation method, the ground in the excavation part is often disturbed, and the compaction in the backfill part is looser than in the state before excavation. There was a problem that a backfill soil part that was not fully compacted between the two.

  In view of this, after installing the slat substitute metal mesh material on the bottom and side surfaces of the elongated recess prepared by cloth digging, etc. instead of the formwork construction, and applying the predetermined bar arrangement processing, this elongated recess By placing concrete beams in the metal mesh formwork material and curing the ground beam integrally on the solid foundation, no extra excavation is required, and the assembly of the formwork and the extra excavation part Therefore, there is no need to backfill the concrete foundation, and a concrete foundation in a state of being securely held by the ground surface dug up is provided.

  In order to solve the above-mentioned problem, the present invention is a underground beam provided integrally with a solid foundation, and the underground beam is provided so that the underground beam follows the bottom surface and the side surface of the elongated recess. A wire netting material and a reinforcing bar arranged inside the wire netting material for the dam plate substitute, and the concrete driven between the wire netting material for the dam plate is replaced with the wire netting material for the dam plate and the dam plate substitution material. It is an underground beam characterized in that it is dammed and cured and hardened by the bottom and side surfaces of the elongated recess to which the wire mesh material is added.

  For concrete foundation underground beams constructed in this way, when using underground beams, there is no need for additional excavation for the construction of concrete casting forms. The bottom and side surfaces of the elongated recesses formed by cloth digging, etc. without the need to assemble the excavated soil excavated on the back side of the driven mold, without assembling the implant mold A concrete placement space is constructed so that the dam plate substitute wire mesh material is lined up, and the concrete placement space is directly surrounded by the dam plate substitution wire mesh material in a state where reinforcement is applied. Concrete is placed in the remaining space, and the placed concrete is cured and hardened in a state where it is dammed up by the wire mesh substitute material and the bottom and side surfaces of the elongated recess.

  As a result, the underground beam in the concrete foundation is configured to be reinforced with a dam-blade wire mesh material along its outer peripheral surface, and the cast concrete is formed of an elongated recess formed by cloth digging or the like. It is constructed as a hardened and hardened underground beam in direct contact with the compacted excavation wall surface, and it does not cause any loose parts in the ground around the concrete foundation, and is maintained stably against the ground. It is considered as a concrete foundation.

  Next, in the concrete foundation having the above-described configuration, the dam plate substitute wire netting material provided along the bottom surface and the side surface of the elongated concave portion is configured in a bowl-shaped body, thereby being configured in the bowl-shaped body. By placing the weir plate substitute wire mesh material in the elongated recess formed by cloth digging etc., the concrete placement space can be easily configured, and the concrete foundation can be made more smoothly and formwork An underground beam having a desired strength can be configured by a wire netting material that is shaped like a dam plate.

  Furthermore, in the underground beam having the above-described configuration, by using the wire netting material for the slat plate as a crimped wire net or an expanded metal, it is possible to easily form a frame-like bowl-shaped body, A crimp wire mesh having a required strength or an expanded metal having a required strength can be selectively used, and the underground beam can be configured to have a required strength.

  The underground beam according to the present invention is configured to provide a concrete placement space by installing a wire mesh substitute material along the bottom and side surfaces of the elongated recess formed by cloth digging or the like. It is not necessary to perform excavation, and the space for placing the excavation soil used for backfilling is not required, so that construction labor and construction members are effectively saved, and the construction cost of the concrete foundation is reduced. In addition, it is possible to configure the underground beam in a manner maintained by the sufficiently compacted ground without the trouble associated with the backfilling of the overburden soil, and without the soil loosening due to the backfilling.

  Hereinafter, the underground beam 12 according to the best mode for carrying out the present invention will be described with reference to FIGS.

1 to 4 show a typical construction example of the concrete foundation 10 in cross section, and in FIG. 1, the solid ground and the cloth excavated on the excavated ground. 2 and FIG. 2 shows a state in which the dam plate substitute wire netting material 33 is accommodated in the elongated recess 22 in which the discarded concrete 24 is struck to form the foundation placing surface. 22 is provided so that the bottom plate 22a and the side surface 22b are provided with a dam plate substitute wire netting material 33. The bottom surface 22a and the side surface 22b of the elongated recess 22 and the dam plate substitute wire netting material 33 A temporary form frame 31 is installed on the circumferential side of the solid foundation placing recess 21 so as to constitute a casting mold, and the peripheral side portion where the solid digging is covered with the weir plate 31a, and the elongated recess 22 is provided. And the solid foundation placement recess 21 The state, in FIG. 3, this concrete 50 Da設 and are shown an installed state of the temporary formwork 32 for rising portion 13a and cross, respectively. In FIG. 4, the concrete foundation 10 in which the underground beam 12 configured in such a series of steps is integrally provided under the solid foundation and the rising portion 13 a is configured in series is shown in cross section.
FIG. 5 shows a gutter-like body 33 ′ formed by a weir plate substitute wire netting material 33 used for the construction of the underground beam 12. In FIG. 6, the underground beam 12 is placed under the solid foundation 11. An example of the concrete foundation 10 provided and viewed from above, FIG. 7 shows a state in which the concrete foundation 10 portion is virtually seen from the underground beam 12 side.

  BEST MODE FOR CARRYING OUT THE INVENTION The underground beam 12 is a weir provided so that the underground beam 12 provided integrally with the solid foundation 11 follows the bottom surface 22a and the side surface 22b of the elongated recess 22 A sheet-substituting wire netting material 33 and a reinforcing bar 40 arranged inside the barrier-plate-substituting wire netting material 33 are provided. The substitute wire mesh material 33 and the bottom surface 22a and the side surface 22b of the elongated recess 22 to which the barrier plate substitute wire mesh material 33 is attached are dammed and cured and hardened.

  The solid foundation 11 configured here does not need to be provided on all of the construction ground 20 surfaces when constructing a structure, but only in a portion that requires the solid foundation 11 corresponding to the characteristics of the structure. The solid foundation 11 may be provided, and other foundation means may be appropriately installed in the other portions to construct the structure.

  In addition, the underground beam 12 provided integrally with the solid foundation 11 is provided in a mode in which the solid foundation 11 can reinforce a portion that requires reinforcement due to earthquake resistance or the like. The solid foundation is provided so as to form the most convenient form in consideration of the ground characteristics on which the solid foundation 11 is provided and the characteristics of the structure constructed on the solid foundation 11. 11, the solid base 11 is received from below and is reinforced.

  Therefore, mainly, the structural characteristics of the underground beam 12 provided for the purpose of reinforcement, the configuration position thereof, etc. are provided with structural characteristics that satisfy the above-mentioned conditions, and at positions that can satisfy the above-mentioned conditions, and A necessary amount is provided.

  Further, the dam plate substitute wire netting material 33 is attached to the surface of the excavated ground 20 and has a weir plate function for damming the cast concrete 50 together with the surface of the ground 20, and the mountain of the excavated ground 20 is collapsed. Any wire netting may be used as long as it can be effectively suppressed. The dam plate substitute wire netting material 33 may have any form as long as it can be provided so as to follow the bottom surface 22a and the side surface 22b of the elongated recess 22 formed by cloth digging or the like. Then, a flat sheet-shaped wire net that is not molded is appropriately bent along the bottom surface 22a and the side surface 22b of the elongated recess 22, and sequentially attached to the bottom surface 22a and the side surface 22b in the longitudinal direction. It may be possible to make it. Further, if the barrier plate metal mesh member 33 is attached to the bottom surface 22a and the side surface 22b of the elongated recess 22, the individual barrier plate metal mesh members 33 may be connected to each other or to each other. You may make it attach so that the bottom face 22a and the side surface 22b of the said elongate recessed part 22 may be covered sequentially so that a mutual end part may be piled up, without connecting. Further, the barrier netting material 33 is shaped by an appropriate means such as bending to form a predetermined three-dimensional shape, which is appropriately connected to form a predetermined formwork shape. Also good. In addition, an appropriate shape-retaining means is further combined with the dam plate-substituting wire netting material 33 to form a dam plate having a shape that fits in the elongated recess 22 and has an open top surface. It may be like that.

  For example, the dam plate substitute wire netting material 33 is more flexible than the elongated recess 22 by using a wire netting material that has flexibility and can be shaped by folding or the like. A driving space can be formed.

  Further, the reinforcing bars 40 arranged inside the barrier plate substitute wire netting material 33 need only be arranged inside the barrier plate substitute wire mesh member 33. For example, it is arranged in series and at the same time with respect to the inner side of the weir plate substitute wire netting material 33 and the concave portion 21 for placing the concrete 50 constituting the solid foundation 11 continuous thereto. Even if it arrange | positions in the said dam board substitute metal-mesh-like material 33 by making a line, it is also the inside of this dam-plate substitute metal-mesh-like material 33, and the placement of the concrete 50 of the solid foundation 11 following this By arranging the reinforcement in series and at the same time in the temporary mold frame 32 constituting the foundation of the rising portion 13a and the like standing on the solid foundation 11, the barrier plate substitute A rebar assembly may be formed in the mesh member 33.

  In addition, the concrete 50 may be driven into the space between the dam plate substitute metal mesh members 33, 33 as long as it is placed between the dam plate substitute wire mesh materials 33, 33. Even when the concrete 50 is driven into the elongated recess 22, the concrete 50 is driven together with the concrete 50 being driven into the concrete placing recess 21 of the solid foundation 11 that is continuous with the elongated recess 22. In addition, when the rising portion 13a and the like are provided on the solid foundation 11, the concrete placing concave portion 21 of the solid foundation 11 and the underground beam are cast together with the concrete 50 such as the rising portion 13a. The casting may be performed by placing concrete 50 into the 12 elongated slots 22 for placing concrete.

  In this way, the concrete 50 placed between the dam plate metal mesh members 33, 33 is replaced with the dam plate metal mesh material 33 by the casting pressure of the concrete 50, and the bottom surface 22 a and the side surface of the elongated recess 22. While pressing against the wire 22b and oozing out from the mesh portion of the dam plate metal mesh 33 toward the bottom surface 22a and the side surface 22b of the elongated recess 22, the dam plate metal mesh 33 is taken into the concrete 50. The underground beam 12 is configured by being cured and hardened in a state where the bottom surface 22a and the side surface 22b of the elongated concave portion 22 and the barrier plate substitute wire netting material 33 are blocked.

  In the concrete foundation 10 configured as described above, when the underground beam 12 is configured, the concrete casting formwork using the surplus portion is used without performing the surfacing for the concrete placement formwork. Without assembling, it is not necessary to backfill the excavated soil excavated on the back side of the driving formwork, and the bottom surface 22a and the side surface 22b of the elongated recess 22 constituted by cloth digging or the like are used. The weir plate substitute wire netting material 33 is provided so as to form a concrete 50 placing space, and in the state where the reinforcement is arranged in the placing space, the weir plate substitute wire mesh material 33, 33 is directly provided. A concrete 50 is placed in the space, and the placed concrete 50 is cured with the weir plate substitute wire netting material 33 and the bottom surface 22a and the side surface 22b of the elongated concave portion 22 being cured. It is allowed to reduction.

  As a result, the underground beam 12 that constitutes the concrete foundation 10 is reinforced by the weir plate substitute wire netting material 33 along the outer peripheral surface thereof, and the placed concrete 50 is constituted by cloth digging or the like. Since it is cured and hardened in direct contact with the excavated wall surface in which the elongated recess 22 is compacted, there is no loose portion on the ground 20 around the underground beam 12 constructed, and the ground The underground beam 12 maintained stably with respect to 20 can be configured.

  Next, in the underground beam 12 having the above-described configuration, by forming the dam plate substitute wire netting material 33 provided along the bottom surface 22a and the side surface 22b of the elongated concave portion 22 into the bowl-shaped body 33 ′, By placing the weir plate substitute wire netting material 33 configured in the bowl-shaped body 33 ′ into the elongated recess 22, it is possible to easily configure the placement space of the concrete 50, The underground beam 12 having the desired strength can be constituted by the wire netting material 33 having a concrete foundation 10 provided more smoothly and shaped like a mold.

  Furthermore, in the underground beam 12 having the above-described configuration, by forming the barrier plate metal mesh member 33 with a crimp wire mesh or an expanded metal, by folding it, a form-like cage member 33 ″ is obtained. It can be easily configured, and a crimp wire mesh having a required strength or an expanded metal having a required strength can be selectively used, and the underground beam 12 is configured to have a required strength. can do.

  Next, the typical underground beam 12 shown in FIGS. 1 to 7 will be specifically described.

  First, a slat substitute wire netting material 33 used for the construction of the planned underground beam 12 is prepared. Such a dam plate wire mesh material 33 is formed by, for example, using an expanded metal or a crimp wire mesh, bending and connecting them, and forming a frame-like cage body 33 ″ as shown in FIG. 5 in advance. This is placed in the elongated recess 22 for placing the underground beam 12 and used for placing the concrete 50. Alternatively, an unmolded piece of, for example, an expanded metal or a crimped wire mesh is used as the underground beam. 12 by pressing sequentially so as to follow the bottom surface 22a and the side surface 22b in the twelve elongated recesses 22 for placement, and sequentially connecting in the longitudinal direction in the elongated recesses 22 It may be configured as 33 ', and concrete 50 may be placed thereon for use.

  The construction target ground 20 is subjected to solid digging and cloth digging for forming the concrete placing concave portions 21 and 22. By this solid digging on the groundwork side, the concrete placement concave portion of the solid foundation 11 is prepared for excavation. Moreover, in this solid digging, an excavation portion 21a necessary for temporary formwork construction for placing the solid foundation 11 into the concrete is prepared for excavation.

  Further, a cloth is dug for forming the elongated concave portion 22 for placing concrete in the underground beam 12. This cloth digging is excavated so as to be continuous with the solid digging portion. The cloth digging for forming the elongated recess 22 satisfies these conditions at a position where the underground beam 12 configured integrally with the solid foundation 11 satisfies various conditions required for the concrete foundation 10. It is applied so that it can be provided in the embodiment.

  In addition to the solid digging and cloth digging, the solid digging recess and the bottom surface 22a of the cloth digging depression are appropriately subjected to foundation ground work such as split chestnut 23 and the like, and the discarded concrete 24 is struck to cast the concrete foundation depression of the solid foundation 11 21 and an elongated concave portion 22 for placing concrete in the underground beam 12 are constituted.

  With respect to the elongated recess 22 prepared in this way, the dam plate substitute wire mesh member 33 such as an expanded metal or a crimp wire mesh is attached to the bottom surface 22a of the elongated recess 22 and to the side surface 22b. To prepare.

  In the case where the barrier netting material 33 is folded in advance to form a bowl-shaped body 33 ′, the bottom surface portion 33a of the bowl-shaped body 33 ′ is changed to the bottom surface 22a of the elongated recess 22; Further, the flanges 33 ′ are placed so as to be sequentially connected in the longitudinal direction in the elongated recess 22 so that the side surface portion 33 b is attached to the side surface 22 b of the elongated recess 22. In addition, as shown in FIG. 5, when the mold-like bowl-shaped body 33 ″ is already constituted by the dam plate metal mesh-like material 33, the mold-like bowl-shaped body 33 ″ is formed into the elongated concave portion. The concrete 50 is placed in the space 22.

  Further, the temporary mold frame 31 is provided in the concrete placing recess 21 of the solid foundation 11 so that the weir plate 31a can be maintained in an upright state by appropriate support means 31b.

  Further, the reinforcing bars 40 are arranged sequentially or simultaneously in the concrete placing concave portion 21 and the elongated concave portion 22 of the solid foundation 11. Such a reinforcing bar 40 may be provided in a continuous manner in the solid foundation 11 portion and the underground beam 12 portion, or may be provided separately. Further, when the rising foundation 13 for a structure such as the rising 13 a provided on the solid foundation 11 is provided, the reinforcing bar 40 of the rising foundation 13 is also connected to the ground when the reinforcing bar 40 is arranged. Even if the reinforcing bars 40 in the middle beam 12 and the solid foundation 11 are continuously arranged in a continuous manner, a reinforcing bar different from these reinforcing bars 40 is prepared and arranged individually. The reinforcing bars for various foundations are arranged in the procedure of reinforcement arrangement corresponding to various purposes in the concrete foundation 10 to be configured.

  Such reinforcing bars 40 are arranged in such a manner that the reinforcing bars 40 of various forms such as the horizontal bars 42, the vertical bars 41, the band bars 43 and the like can conveniently cope with various forms of rigidity required for the concrete foundation 10.

  Concrete 50 is placed in both the elongated recess 22 subjected to the bar arrangement processing and the concrete placing recess 21 of the solid foundation 11 simultaneously, continuously, or one of them.

  The placed concrete 50 functions to press the weir plate substitute wire mesh member 33 against the bottom surface 22a and the side surface 22b of the elongated recess 22 with the concrete placing pressure in the elongated recess 22, and the weir. It leaks out from the board substitute wire netting material 33 to the ground side of the bottom surface 22 a and the side surface 22 b of the elongated recess 22, and the barrier plate metal mesh material 33 is taken into the concrete 50. That is, the concrete 50 placed in the driving space formed by the barrier plate substitute wire netting material 33 supported on the bottom surface 22a and the side surface 22b of the elongated concave portion 22 is elongated to the barrier plate substitute wire mesh member 33. In a state of pressing the bottom surface 22a and the side surface 22b of the concave portion 22 and taking in this wire plate substitute wire netting material 33, it is blocked, cured, hardened, and the intended underground beam 12 alone, Alternatively, it is configured together with the solid base 11.

  Further, as shown in FIG. 3 and FIG. 4, when constructing the solid foundation 11 including the underground beam 12 as necessary, the vertical reinforcement of the rising foundation portion 13 such as the rising portion 13 a is performed. Then, the vertical bars 41 are subjected to a bar arrangement process such as the horizontal bars 42 and the temporary mold frame 32 made of a steel mold frame held by the mold frame holding means 32 a is placed on the solid foundation 11, and the concrete 50 is raised by driving in the concrete 50. A base portion 13 is provided. Alternatively, after the solid foundation 11 is constructed, the rising foundation portion 13 may be provided by performing temporary formwork construction, bar arrangement construction, and concrete placement. Further, by arranging the underground beam 12 and the solid foundation 11 at the same time, and performing the temporary formwork and placing the concrete, the rising foundation portion simultaneously with the underground beam 12 and the solid foundation 11 is provided. 13 may be provided.

  The concrete foundation 10 having the underground beam 12 configured as described above can be easily configured in the portion of the underground beam 12, and the elongated concave portion 22 can be formed without loosening the pile of the ground 20 that has been dug. Because the concrete 50 can be placed on the ground, the constructed underground beam 12 can be provided in a state of being supported by the ground 20 while being compacted. In addition, the constructed underground beam 12 is provided with a wire netting material 33 such as an expanded metal or a crimped wire mesh in a state where the peripheral surface portion is covered with the concrete 50, and the strength of the underground beam 12 is increased. Furthermore, it can be set as the reinforced structure.

Cross-sectional view of the main part showing the process of a typical underground beam construction example Cross section of the main part showing the same process The principal part sectional view showing the next one process Sectional view showing a part of the construction completion state A perspective view showing an example of the same frame-like bowl-shaped body Plan view of the construction completion state of an example of the same concrete foundation Schematic diagram of the concrete foundation part after completion of construction

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Solid foundation 12 Underground beam 22 Elongated recessed part 22a Bottom face 22b Side face 33 Barrel substitute metal net-like material 33 'Rod-like body 40 Reinforcement 50 Concrete

Claims (3)

An underground beam provided integrally with a solid foundation,
The underground beam includes a dam plate metal mesh material provided so as to follow the bottom and side surfaces of the elongated recess, and a reinforcing bar arranged inside the dam plate metal mesh material. The concrete struck between the sheet metal substitutes is dammed and cured and hardened by the barrier metal substitutes and the bottom and side surfaces of the elongated recesses to which the sheet metal substitutes are attached. An underground beam characterized by   The underground beam according to claim 1, wherein a dam plate substitute wire netting material provided so as to follow a bottom surface and a side surface of the elongated concave portion is a hook-like body.   The underground beam according to claim 1 or 2, wherein the barrier plate substitute wire mesh material is a crimp wire mesh or an expanded metal.

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