JP4200521B2 - Unit box basement - Google Patents

Description

  The present invention relates to a unit-type box-type basement that is constructed by carrying a metal base unit, which is mainly manufactured using steel, into a construction site and installing it in the basement. Specifically, a wall structure, a ceiling structure, and a floor structure in which a steel plate is used as a core material, and a metal plate such as a steel plate is fixed to a shaft assembly configured by arranging the core material steel frames at a predetermined pitch interval. Assembled to produce a ramen-structured metal underground unit at the factory, and then install any number of these underground units into the construction site and install them in a row on a concrete foundation formed at the bottom of the excavation hole, and adjacent Unit type box type that builds a box-shaped underground structure with a square frame structure in the short side direction and a seismic wall structure in the long side direction to connect the underground units to each other and construct a basement of the desired volume It relates to the basement.

  For this type of box-type basement, it is only necessary to embed a metal-shaped underground unit that can be manufactured (produced) with high quality and high precision at the factory and embed it underground. Compared to a basement made of steel or steel frames, the construction work at the construction site is greatly reduced to significantly reduce the construction period and reduce construction costs, and unit vehicles such as trucks can be passed. However, for example, it is possible to efficiently construct a basement even in a narrow area often found in urban areas. In addition, by adopting a composite structure with a □ -type ramen structure in the short side direction and a seismic wall structure in the long side direction, it has sufficient proof strength against large earth pressure and water pressure applied to the underground frame in an underground state. Has many merits, such as having.

  By the way, in this type of unit type box-type basement, as a structure of a wall, a ceiling, and a floor in a metal underground unit configured in a ramen structure, conventionally, as shown in FIG. The structure which fixed the metal plates 32, such as a steel plate, to the outer side of 31 by welding etc. was employ | adopted. Further, the entire outer surface of the metal plate 32 such as a steel plate fixed to the outer side of the core 31 for the shaft assembly in consideration of using a metal material that easily generates rust and corrosion, such as a steel frame and a steel plate. A special semi-permanent anti-corrosion and anti-corrosion coating film 33 is applied using a special paint, and after installation at the construction site, excavated soil or cement-based ground solidification material is applied to the overexcavated part of the outer periphery of the underground unit. Means for performing backfilling work while back-filling was adopted (for example, see Patent Document 1).

  Japanese Patent Laid-Open No. 7-317083

  However, in the conventional underground unit in which the metal plate 32 is fixed to the outer side of the shaft core steel frame 31 as described above, a plurality of core material steel frames 31 are arranged at a predetermined pitch inward from the metal plate 32. Since it protrudes at intervals, the band-like region A (the lattice line insertion location in FIG. 8) corresponding to the protruding width W of the core steel frame 31 cannot be used as the effective internal volume of the basement, and is substantially effective. The internal volume is limited to a region surrounded by a line connecting the inner ends of the core steel frame. In this type of box-type basement, the heat insulating layer 34 is generally formed on the inner surface side of the basement unit by spraying urethane or the like. In this case as well, the core steel frame 31 projects inwardly in pieces. Therefore, in order to ensure the heat insulation of the whole basement, it is necessary to spray and form the heat insulating layer 34 in a state of surrounding not only the inner surface of the metal plate 32 but also the inwardly protruding portion of the core steel frame 21. Therefore, the heat insulation work itself becomes troublesome and cumbersome, and many heat insulation materials such as urethane must be used for the heat treatment.

  Further, as a rust and corrosion preventive measure for improving the durability life, a thick film type semi-permanent rust and corrosion preventive coating 33 is formed on the entire outer surface of the metal plate 32. In this case, an expensive special paint is used. In addition to the need for use, high-level technology and a great deal of labor are required for the painting work to finish the entire coating film to a uniform thickness. In addition, backfilling of earth and sand and cement-based ground solidification material at the construction site In addition, it takes a great deal of labor and labor, and it is incompatible with painting and backfilling work at the construction site as a countermeasure against rust and corrosion, the poor workability required for the above-mentioned heat insulation treatment, and the large amount of urethane used. As a result, the total cost of the basement as a whole tends to increase.

  The present invention has been made in view of the above circumstances, eliminating the need for coating for rust and corrosion prevention, simplifying and simplifying on-site construction, facilitating heat insulation work, saving heat insulation materials, and further using metal materials The unit type box type that can achieve a significant reduction in total cost due to the decrease in structure, and can improve the structural strength and waterproof / moisture / condensation / insulation properties while ensuring an effective internal volume equal to or greater than that of the previous model. Its purpose is to provide basement life.

  The unit-type box-type basement according to the present invention devised to achieve the above object uses a core steel frame arranged at a predetermined pitch interval as a shaft assembly, and a metal plate is fixed to the core steel frame for the shaft assembly. A pair of left and right wall structures, ceiling structures and floor structures are assembled at the factory production stage, and an arbitrary number of metal underground units configured in a ramen structure are brought into the construction site and formed at the bottom of the excavation hole A box-type frame structure with a □ -type ramen structure in the short side direction and a seismic wall structure in the long side direction by installing and installing adjacent underground units in a row on a concrete foundation A unit-type box-shaped basement in which an underground skeleton is constructed, and each of the wall, ceiling, and floor structures in the metal underground unit has a metal plate fixed to the inner side of the core steel frame for the frame assembly, and The above On the outside of the box-shaped underground structure, a concrete wall is formed so as to have an integrated composite structure with the underground structure in a state of surrounding the entire outer periphery thereof, and each structure that becomes the inner wall surface of the box-shaped underground structure A heat insulating layer is formed on the inner surface of the metal plate.

  According to the present invention having the above-described characteristic configuration, since the metal plate is fixed to the inner side of the core material steel frame for each structural body in the underground unit, the core material steel frame projects toward the inside of the underground room. A metal plate with a flat area of heat insulating material such as urethane while ensuring an effective internal volume equal to or greater than that of a conventional basement, in which a metal plate is fixed to the outside of the core steel frame By spraying on the inner surface, it is possible to uniformly insulate the entire interior of the room, making heat insulation work easier and improving the quality of the heat insulation layer compared to conventional methods, and reducing the amount of heat insulation material used. it can.

  In addition, at the construction site, the underground structure is installed in an overexcavation part outside the box-shaped underground structure assembled by joining and connecting adjacent units of a plurality of underground units installed and installed on a concrete foundation. It is possible to replace the concrete wall with a rust-proofing and anti-corrosion coating on the entire outer surface of the metal underground frame by simply forming a concrete wall so as to surround the entire outer periphery of the The use of expensive paint at the time of factory production, advanced technology and time-consuming painting work can be omitted, and the work of refilling the drilling soil and cement-based ground solidification material at the construction site sequentially Time-consuming backfilling work can be simplified and rationalized. In addition, most of the core steel frames for the frames of each structure in each underground unit protrude outward, and the protruding steel part is embedded in the concrete wall, and the concrete wall embedded in the steel part And the underground frame constitute a so-called integrated structure of SC construction, so it is possible to reduce the amount of metal materials (core steel frame and metal plate) used in each underground unit. Combined with omission, simplified rationalization of on-site construction, easy thermal insulation work, and reduction of thermal insulation materials, the structural strength can be improved while significantly reducing the total cost. Furthermore, because of the double wall structure inside and outside, it has excellent waterproof, moisture-proof, and dew condensation properties required for the basement, as well as excellent buoyancy countermeasures (prevention of lifting) in areas with high groundwater levels. There is an effect that the durability life can be remarkably increased.

  In the unit-type box-shaped basement according to the present invention as described above, in particular, as described in claim 2, the core structure steel frame for a wall structure, a floor structure, and a ceiling structure in a metal basement unit. The pitch of the core steel frame of each structure is fixed by horizontally fixing a metal reinforcing material so as to be in a state of equal distribution or almost equal load corresponding to the distribution of load load to each structure. It is not necessary to set the interval to a narrow equal pitch interval corresponding to the maximum load of each structure, and the structural strength required for each structure can be reduced while further reducing the cost of manufacturing underground units. In addition, the weight of a single underground unit of the same size can be reduced, so that the transportation cost and the construction cost can be reduced, and the construction cost of a predetermined basement can be further reduced.

  Moreover, in the unit type box-type basement according to the present invention, as described in claim 3, a concrete wall body formed to surround the outer periphery of the underground frame is reinforced outside the shaft core steel frame. By fixing the metal mesh, the strength of the concrete wall, and thus the SC composite structure can be further improved.

  Furthermore, in the unit type box-type basement according to the present invention, the earth retaining sheet pile for forming the concrete wall body at the construction site is buried in the outer position of the concrete wall body as described in claim 4. In the case of adopting the means to drive into the ground, it is possible to simplify the construction and reduce the influence on the adjacent land by eliminating the need for temporary frame work, and increase the support strength of the underground unit and underground frame to the ground. Thus, the effect of preventing uneven settlement can be enhanced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a schematic perspective view showing an outline of a construction state of a unit type box-type basement according to the present invention, FIG. 2 is a schematic longitudinal front view showing a construction completion state of the basement, and FIG. 3 is taken along line XX of FIG. 4 is a cross-sectional plan view taken along line YY in FIG. 2, and FIG. 5 is a cross-sectional plan view taken along line ZZ in FIG.

  This unit-type box-type basement is standardized in terms of dimensions and shape, and any number of metal base units 1 manufactured in the same specifications and structure at the factory are brought into the construction site by trucks, etc. Each underground unit 1 is in the long side direction on the reinforced concrete foundation 2 formed in advance at the bottom of the excavation hole surrounded by the earth retaining sheet pile 12 that is buried in the ground around the H-shaped steel 11 Are installed in series so as to be continuous with each other, and adjacent underground units 1 and 1 are joined and connected to each other, and at both ends in the long side direction of the plurality of underground units 1 installed in series, respectively. A box-shaped underground housing 10 is constructed by fixing the end walls 3 and 3 (see FIGS. 3 to 5), and the inside thereof is configured (completed) into a basement BR having a desired volume.

  As shown in FIGS. 2 to 5 and 6, each of the metal underground units 1 is composed of core steel frames 4, such as T-shaped steel, H-shaped steel, and channel steel, arranged at predetermined pitch intervals. 7, a pair of left and right wall structures 6, 6, a ceiling structure 7, and a floor structure 8, each of which has a metal plate 5 such as a steel plate fixed therein, A pair of wall structures 6 and 6, a ceiling structure 7 and a floor structure 8 are assembled together at the factory production stage, and as shown most clearly in FIG. The box-shaped underground structure 10 having a square frame structure in the short side direction and a seismic wall structure in the long side direction is constructed by joining and connecting these underground units 1. Yes. In addition, the said end walls 3 and 3 make the core material steel frame 4 '... arrange | positioned by predetermined pitch space | interval like a wall structure 6 and 6 in the said underground unit 1, a metal plate, such as a steel plate, in the inner side. 5 'is fixed.

  A square frame structure constituting the basement BR having a desired volume as described above and the outside of the box-type underground housing 10 having a seismic wall structure, specifically, a pair of left and right wall structures 6 in each underground unit 1 6 and concrete between the outer surface of the end walls 3 and 3 and the above-mentioned earth retaining sheet pile 12 and between the outer surface of the floor structure 8 and the reinforced concrete foundation 2 in each underground unit 1, By placing concrete on the top of the ceiling structure 7 in each underground unit 1 so as to be at the same level as the ground surface GL, a concrete wall body 17 surrounding the entire outer periphery of the underground frame 10 is formed. Yes. In the concrete wall body 17, the core steel frames 4 ... of the structures 6, 7, 8 and the core steel frames 4 'of the end wall 3 are embedded, whereby the box-shaped underground frame 10 and the concrete wall are embedded. The body 17 is configured as a so-called SC-made integrated composite structure.

  As shown in FIG. 6, a metal mesh 13 is fixed to the outer ends of the cores for the shaft assembly 4 of the structures 6, 7, and 8, as shown in FIG. Is embedded in the concrete wall body 17 so that the concrete wall body 17 is reinforced. However, the metal mesh 13 may not be provided.

  Of the plurality of metal underground units 1 installed in series, the ceiling structure 7 constituting the underground unit 1 at one end in the long side direction moves up and down with the upper building (not shown). A staircase opening 7A (see FIGS. 1 and 4) is formed.

  Further, as shown in FIG. 6, adjacent underground units 1 and 1 are welded to the web portions of the core steel frames (using channels) 4 and 4 at the ends of both units 1 and 1, respectively. Between the flanges of the angles 14, 14, a rubber elastic material sealing material 18 is sandwiched and held between tightening restriction plates 15, 16 such as flat bars, and both core steel frames 4, 4 are connected to each other by bolts and nuts 19. By tightly bonding, the sealing material 18 is elastically compressed with an appropriate force without sag and joined and connected in a watertight state to prevent intrusion of groundwater or rainwater from the outside into the basement BR for a long period of time. Has been.

  Furthermore, as shown in FIGS. 2 to 5, the wall structure 6, the ceiling structure 7, and the floor structure 8 of the core structure steel frame 4 of the floor structure 8 in each underground unit 1 constituting the box-type underground structure 10 are shown in FIGS. 2 to 5. In addition, a reinforcing material made of metal at a density such that a load of equal distribution or almost equal distribution is applied over the entire area corresponding to the distribution of the load applied to each of the wall structures 6, 7, 8, Steel flat bars 20 are horizontally fixed in parallel with each other, and furthermore, the inner surfaces of the metal plates 5 of the structures 6, 7, 8 are sprayed with urethane or the like at the construction site in FIG. As clearly shown, a flat heat insulating layer 21 is formed over the entire region.

  As described above, by fixing the metal plate 5 to the inside of the shaft core steel frames 4 of the structures 6, 7, and 8 in the underground unit 1, the core steel frames 4 inward toward the basement BR. As a result, the entire area is covered with a heat insulating material such as urethane while ensuring an effective internal volume equal to or greater than that of a conventional basement in which a metal plate is fixed to the outside of the core steel frame. By spraying on the inner surface of the flat metal plate 5, it is possible to uniformly insulate the entire interior of the room, making the heat insulation work easier and improving the quality of the heat insulation layer 21 compared to the conventional one, and heat insulation such as urethane. The amount of material used can also be reduced.

  In addition, at the construction site, the concrete wall 17 is formed in an overexcavated portion outside the box-type underground skeleton 10 constructed by joining and connecting the underground units 1 installed and installed on the concrete foundation 2. 17 is replaced with anti-corrosion and anti-corrosion coating for the underground unit 1 and the metal underground unit 1, so expensive paint is used when manufacturing the underground unit 1 at the factory, and it requires advanced technology and a great deal of time to apply it. This eliminates the necessary painting work and simplifies and rationalizes the backfilling work that requires time and labor, such as refilling the excavated earth and sand and cement-based ground solidified material in sequence. In addition, most of the core steel cores 4 for the structures 6, 7, and 8 in each underground unit 1 are embedded in the concrete wall 17, and the steel part embedded concrete wall 17 and the underground Since the so-called SRC-made integrated composite structure is formed with the housing 10, it is possible to reduce the amount of metal materials (core steel frames and metal plates) used in each underground unit 1, and the above-described painting. Combined with omission, simplified rationalization of on-site construction, ease of heat insulation work, and reduction of heat insulation materials, it is possible to improve the structural strength and improve the durability life while significantly reducing the total cost.

  Furthermore, it becomes a composite structure of SC-made inner and outer double walls, and most of the earth pressure and water pressure acting on the underground frame 10 can be borne by the outer C (concrete wall 17 embedded in the core steel frame). By reducing the amount of metal material (core steel frame 4..., Metal plate 5) used in the unit 1, it is possible to further reduce the manufacturing cost and further the total cost of the underground unit 1.

It is a schematic perspective view which shows the outline | summary of the construction state of the unit type box-type basement which concerns on this invention. It is a schematic longitudinal front view which shows the construction completion state of the basement. It is a vertical side view along the XX line of FIG. FIG. 3 is a transverse plan view taken along line YY in FIG. 2. FIG. 3 is a transverse plan view taken along the line ZZ in FIG. 2. It is an expanded sectional view of the principal part of a metal underground unit. FIG. 3 is an enlarged detail view of a portion B surrounded by a one-dot chain line in FIG. 2. It is an expanded sectional view of the principal part of the conventional unit type box-type basement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Metal underground unit 2 Concrete base 4 Core steel frame 5 Metal plate 6 Wall structure 7 Ceiling structure 8 Floor structure 10 Box-shaped underground frame 12 Earth retaining sheet pile 13 Metal mesh 17 Concrete wall 20 Steel flat Bar (reinforcing material)
21 Insulation layer BR Basement

Claims (4)

At the factory production stage, a pair of left and right wall structures, ceiling structures, and floor structures in which a core steel frame arranged at a predetermined pitch interval is used as a shaft assembly, and a metal plate is fixed to the core steel frame for the shaft assembly. Any number of metal underground units assembled into a ramen structure are brought into the construction site, installed and installed in rows on a concrete foundation formed at the bottom of the excavation hole, and adjacent underground units are connected to each other It is a unit type box-type basement in which a box-type underground structure with a □ type ramen structure in the short side direction and a seismic wall structure in the long side direction is constructed by joining and connecting to,
Each of the wall, ceiling, and floor structures in the metal underground unit has a metal plate fixed to the inside of the core steel frame for the frame assembly, and the outer periphery of the box-shaped underground skeleton is entirely outside. The concrete wall body is formed so as to have an integrated composite structure with the underground structure in the surrounding state, and a heat insulating layer is formed on the inner surface of the metal plate of each structure that becomes the inner wall surface of the box-shaped underground structure. Unit-type box basement characterized by   In the above-mentioned metal underground unit, the core steel for the frame structure of the wall structure, floor structure and ceiling structure is in a state of equal distribution or almost equal distribution corresponding to the distribution of load load to each structure. The unit type box basement according to claim 1, wherein a metal reinforcing material is horizontally fixed so as to become.   The unit type box-shaped basement according to claim 1 or 2, wherein a metal mesh that reinforces a concrete wall formed so as to surround an outer periphery of the underground frame is fixed to the outside of the core steel frame for the frame. .   The unit according to any one of claims 1 to 3, wherein a retaining sheet pile for forming the concrete wall body at a construction site is buried in the ground at an outer position of the concrete wall body. Box-type basement.

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