JP2006328839A - Underground space facility and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underground space facility, usable for various uses due to a columnless space, by improving a storage rate by creating the columnless space in a large-scale underground space, regardless of a load of a storage object. <P>SOLUTION: An annular truss frame 4 constitutes this underground space facility 1, and is composed of an outer peripheral ring material 7, an inner peripheral ring material 8 concentrically arranged with the outer peripheral ring material, and a connecting material 9 for respectively joining one end to the outer peripheral ring material 7 and the other end to the inner peripheral ring material 8 by pins. Here, the annular truss frame 4 is constituted so that the outer peripheral ring material 7 is connected to an inner surface of an excavation hole 3, and a horizontal plane of structure of the inner peripheral ring material 8 is formed higher by ΔH than a horizontal plane of structure of the outer peripheral ring material 7 in such a state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an underground space facility used for various purposes including storing a storage object such as an automobile or a bicycle, and a construction method thereof.

  Since the effective use of the underground space has been taken into account, many technological developments have been made to install parking lots and bicycle parking lots underground, but the needs in the city center are increasing.

  Specifically, there are many proposals for a cylindrical facility in which elevators and lifts such as elevators are installed in the center and radial parking lots and bicycle parking lots are provided in multiple layers so as to surround them.

JP-A-7-82927 JP-A-9-328923 JP-A-10-115121 JP2000-230340 JP-A-11-131849 JP 2001-248322 A

  However, in this prior art, there was room for improvement in terms of load support structure and space utilization.

  In other words, the conventional technology has an ordinary load-supporting structure in which the loads of automobiles on each floor (each layer) are sequentially received by the pillars on the lower floor, so the underground space is full of pillars and effectively uses the space. However, there is a limit, resulting in a problem that the housing efficiency is lowered.

  In addition, since pillars stand between the hollows, there has been a problem that the use is limited to a bicycle parking lot, a parking lot, or a warehouse.

  On the other hand, when the load on the load is small as in a bicycle parking lot, a member for storing the load is provided in a cantilevered manner from the inner wall of the cylindrical wall as disclosed in the prior art. It will be sufficient, but not only is it difficult to accommodate relatively heavy items such as automobiles, but the inner diameter of the underground space must be reduced due to the distance from the elevator and lift. As a result, there arises another problem that it is difficult to improve the accommodation efficiency by increasing the scale of the facility.

  The present invention has been made in consideration of the above-described circumstances, and creates a column-free space between large underground cavities irrespective of the load of the contained matter, thereby improving the accommodation rate and eliminating the need for It is an object of the present invention to provide an underground space facility that can be used for various purposes and a construction method thereof because of the pillar space.

  In order to achieve the above object, an underground space facility according to the present invention includes an outer peripheral ring member, an inner peripheral ring member arranged concentrically with the outer peripheral ring member, and one end as described in claim 1. An annular truss frame is configured from the outer ring member and a connecting member having the other end pin-connected to the inner ring member, and the annular truss frame is horizontally installed in a plurality of stages in the excavation hole of the ground. Elevating equipment is penetrated and installed in the hollow space formed in the center of the annular truss frame, and the outer ring material is connected to the inner surface of the excavation hole, and in this state, the horizontal structure of the inner ring material is The annular truss frame is configured to be higher than the horizontal surface of the outer ring material by a predetermined height.

  Further, the underground space facility according to the present invention is configured such that a cylindrical wall body is disposed in a hollow space formed in the center of the annular truss frame, and the lifting equipment is installed inside the cylindrical wall body. The entrance / exit opening of the lifting equipment is formed in the cylindrical wall body, and the flooring is laid horizontally on the annular truss frame.

  Moreover, the underground space facility which concerns on this invention connects a pair of cyclic | annular truss frame which opposes up and down among the cyclic | annular truss frame installed in multiple steps mutually.

  Moreover, the construction method of the underground space facility according to the present invention constructs a pile in the ground as described in claim 4, and constructs an annular earth retaining wall in the ground so as not to interfere with the pile, By digging down the inner ground surrounded by the retaining wall, a drilling hole is formed as an internal space of the retaining wall, and a plurality of horizontal truss frames are horizontally installed in the drilling hole. A construction method of an underground space facility in which an elevating equipment is installed through a hollow space formed in the center and is connected to the head of the pile, and an upper structure is constructed. And an inner ring material arranged so as to be concentric with the outer ring material, and a connecting material in which one end is pin-joined to the outer ring material and the other end is connected to the inner ring material. Place the outer ring material on the inner surface of the borehole Binding to one in which the horizontal Plane of the inner peripheral ring material is configured to be higher by a predetermined height than the horizontal Plane of the outer peripheral ring member in such a state.

  In the underground space facility construction method according to the present invention, the pile and the annular truss frame are connected to each other so as to allow relative movement in the vertical direction.

  In the underground space facility according to the present invention, the outer peripheral ring member is connected to the inner surface of the excavation hole, and in this state, the horizontal surface of the inner peripheral ring member is higher than the horizontal surface of the outer peripheral ring member by a predetermined height. An annular truss frame is configured as described above.

  That is, the connecting members are arranged in a generally radial manner and are pin-joined with a downward gradient so as to be substantially radial from the inner ring member to the outer ring member.

  In this way, when a vertical load is applied to the inner ring material, the inner ring material is deformed so as to be lowered vertically, and accordingly, the connecting material is made more horizontal from the inclined state of the descending slope. Deformation that attempts to rotate to a near slope occurs.

  As a result, the inner ring material is deformed in a direction in which the diameter is reduced, so that a compressive force is generated, and the connecting material is also deformed in a direction in which the axial length is reduced, so that a compressive force is generated.

  Therefore, the vertical load acting on the inner ring material is transmitted to the outer ring material with a horizontal component and a vertical component in the direction of pushing out radially.

  The vertical component transmitted to the outer peripheral ring material is transmitted and supported by the earth retaining wall formed along the inner side of the excavation hole because the outer peripheral ring material is connected to the inner surface of the excavation hole.

  On the other hand, with regard to the horizontal component transmitted to the outer ring material, the transmission property differs depending on the relative size difference between the rigidity of the retaining wall and ground and the rigidity of the outer ring material, and the rigidity of the retaining wall and ground is different. When it is small, a tensile force is generated in the outer ring material, and in some cases, the horizontal component does not act on the earth retaining wall, and the horizontal component is balanced by the tensile force of the outer ring material. In this case, the earth retaining wall and the annular truss frame are configured such that load transmission is performed only in the vertical direction and independent of each other in the horizontal direction.

  On the other hand, when the earth retaining wall and the ground have high rigidity, a compressive force is generated in the outer ring material and further transmitted to the earth retaining wall and the ground spreading on the back surface. In this case, the ground, the retaining wall, and the annular truss frame are integrated.

  And by such integration, when viewed from the annular truss frame, the load load is supported by the back earth pressure of the retaining wall and the rigidity of the retaining wall, so that the member cross section of the annular truss frame can be reduced. When viewed from the retaining wall, the cross-sectional thickness of the retaining wall can be reduced by supporting the back earth pressure with the rigidity of the annular truss frame and the loaded load thereon, so the annular truss frame and retaining wall As a result, the construction period and construction cost can be reduced.

  The earth retaining wall formed in an annular shape varies from a steel sheet pile to an RC underground wall, as will be described later, depending on the size of the excavation hole. The resistance of the radial horizontal component is offset by the bending moment and compressive force generated on the retaining wall, while the resistance of the back earth pressure is reduced. It will be stably supported as a reaction force.

  In any case, a column that supports the loading load of the annular truss frame becomes unnecessary, and the underground space in the excavation hole can be used effectively. In addition, although a vertical load acts also on an outer periphery ring material among annular truss frames, since such a vertical load should just be supported by a retaining wall, there is no difference that a pillar is unnecessary.

  For example, if the drilling hole is a perfect circle, the outer ring material and inner ring material are divided into 120 degrees according to the curvature of the drilling hole, bent, and brought into the field, and then joined into a ring shape. Although it is possible to form, a straight truss member may be combined in a polygonal shape.

  It is arbitrary what kind of members the outer ring material and the inner ring material are configured. For example, the inner ring material is a member having a strong compression resistance. For example, it is desirable to use a circular or square steel pipe / pipe having a closed cross section, a CFT in which concrete is filled in the steel pipe, or the like.

  What is necessary is just to comprise about a connection material similarly to an inner peripheral ring material.

  The outer ring member and inner ring member are preferably round as much as possible. However, as long as the vertical load acting on the annular truss frame can be substantially supported by the above-described force flow, it is not always necessary to be a perfect circle. A close ellipse may be used.

  As for the height from the horizontal surface formed by the outer ring material to the horizontal surface formed by the inner ring material, any height can be used as long as the vertical load acting on the annular truss frame can be substantially supported by the above-described force flow. Whether the height is set is arbitrary, and may be appropriately determined in consideration of the diameter of the excavation hole, the assumed loading load in the design, the connecting material, and the like.

  It goes without saying that the number of installation stages of the annular truss frame is arbitrary, but the greater the number of installation stages, the deeper the excavation depth of the ground, so a retaining wall suitable for the excavation depth is adopted. For example, a steel sheet pile, a steel pipe sheet pile, a columnar continuous wall made of soil cement, an RC underground wall, a segment, or the like may be selected as appropriate.

  The lifting equipment is selected according to the application, such as an elevator or a lift. In addition, since many methods are already well-known about the method and installation structure of installing lifting equipment, the specific description is abbreviate | omitted here.

  As a method of fixing the outer peripheral ring material to the inner surface of the excavation hole, it is possible to appropriately adopt from known means. For example, a method of embedding a metal object in advance in the RC underground wall and welding and fixing to the metal object, A method of welding and fixing to a sheet pile or a steel pipe sheet pile is conceivable.

  The side surface of the outer ring material and the inner surface of the excavation hole do not need to be in contact with the entire circumference. For example, even if the excavation hole has a rectangular shape, the outer ring material has four points on the rectangular excavation hole. You may make an inscription. In addition, since the earth retaining wall must support the earth pressure on the back, if it becomes a large scale (large depth), it is highly necessary to form the inner surface of the excavation hole with a cylindrical earth retaining wall made of RC underground walls. In this case, naturally, the outer diameter of the outer peripheral ring material and the inner diameter of the drilling hole are almost equal, but even in such a case, whether contact points (connection points) for transmitting the load are continuously provided over the entire circumference. For example, it is arbitrary to provide discretely every 10 °.

  Such an underground space facility can be used for various purposes such as a plant factory and a rental room because the space becomes a pillar-free space as well as a parking lot, a bicycle parking lot or a warehouse.

  Here, a cylindrical wall body is disposed in a hollow space formed in the center of the annular truss frame, and the lifting equipment is installed inside the cylindrical wall body. If the floor material is laid horizontally on the annular truss frame, a person can enter and exit the underground space facility according to the present invention and can perform a predetermined work in the underground space facility. For example, it can be used as a research facility, particularly a research facility that is preferably not affected by variations in temperature and humidity.

  If the annular truss frame and the cylindrical wall are integrated, the structural stability can be improved.

  In addition, although the flooring mentioned above needs to be laid horizontally on the inclined connection material, this flooring also contributes to improving the horizontal rigidity of the annular truss frame.

  Moreover, if a pair of annular truss frames that are vertically opposed to each other among the annular truss frames installed in a plurality of stages are connected to each other, the rigidity of the annular truss frame can be increased in a three-dimensional form.

  The position of the annular truss frame facing the pair of upper and lower annular truss frames is arbitrary.For example, if the position is near the bottom plate formed at the bottom of the excavation hole, the rigidity around the bottom plate is increased. It can resist groundwater pressure without making the bottom plate too thick. Moreover, if it is set as the depth position of the soil layer with high earth pressure or the soil layer (saturated sandy ground) which is easy to liquefy in relation to soil properties, it can counter these with sufficient rigidity. In addition, if the upper loading pressure is set at a large position, a large loading load can be supported with sufficient rigidity.

  In the construction method of the underground space facility according to the present invention, a pile is first constructed in the ground, and then an annular earth retaining wall is constructed in the ground so as not to interfere with the pile.

  The retaining wall may be appropriately selected from, for example, a steel sheet pile, a steel pipe sheet pile, a columnar continuous wall made of soil cement, an RC underground wall, and the like according to the excavation depth and soil properties.

  Next, the inner ground surrounded by the retaining wall is dug down to form an excavation hole as an internal space of the retaining wall, and a plurality of annular truss frames are horizontally installed in the excavation hole.

  In this case, it is possible to construct the annular truss frame with the ring truss structure facing downward while digging down the internal space of the retaining wall. It doesn't matter. The former construction method is suitable when an annular truss structure is desired to have the same function as a cutting beam, and the latter construction method is structurally independent by supporting earth pressure only with a retaining wall. It is a construction method suitable for the case where it is made.

  Next, an elevating equipment is installed in a hollow space formed in the center of the annular truss frame, and finally, an upper structure is constructed in such a manner that it is connected to the head of the pile.

  Since the structure of the annular truss frame has already been described, the description thereof is omitted here.

  According to the construction method of the underground space facility according to the present invention, it becomes possible to construct the underground space facility according to the present invention in the underground portion of the upper structure, and if the upper structure is an office building or a condominium The underground space facility can be used for, for example, a parking lot, and if the superstructure is a laboratory building, the underground space facility can be used for a storage, a research facility, or a plant factory.

  Needless to say, natural light can be sent to an underground space facility using an optical fiber.

  Here, if the pile and the annular truss frame are connected to each other so that relative movement in the vertical direction is allowed, buckling of the pile can be prevented.

  Embodiments of an underground space facility and its construction method according to the present invention will be described below with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

(First embodiment)

  FIG. 1 is a diagram showing an underground space facility according to the present embodiment. As can be seen from the figure, the underground space facility 1 according to this embodiment has a plurality of horizontal truss frames 4 installed horizontally in the excavation holes 3 of the ground 2 and a hollow formed in the center of the annular truss frame. An elevating equipment 6 is installed through the space 5.

  As shown in detail in FIG. 2, the annular truss frame 4 includes an outer peripheral ring member 7, an inner peripheral ring member 8 disposed so as to be concentric with the outer peripheral ring member, and one end connected to the outer ring member 7. Are connected to the inner ring material 8 and connected to each other by a pin 9.

  Here, the annular truss frame 4 is connected to the inner surface of the excavation hole 3 and the horizontal surface of the inner ring member 8 is connected to the outer ring member in this state, as can be seen in FIG. 7 so as to be higher by ΔH than the horizontal plane of No. 7.

  If the drilling hole 3 is a perfect circle, the outer ring member 7 and the inner ring member 8 are bent, for example, by bending H-shaped steel 120 ° in accordance with the curvature of the drilling hole 3 and carrying them into the field. What is necessary is just to weld-join to a shape.

  The connecting material 9 may be configured using H-shaped steel, but as described above, both ends of the connecting material 9 are pin-bonded to the outer ring material 7 and the inner ring material 8 with bolts or the like.

  The elevating equipment 6 can be configured by an elevator, for example, but the method and installation configuration for installing the elevating equipment may be appropriately selected from known techniques according to the application.

  The excavation hole 3 is an internal space of an earth pressure support frame composed of an RC underground wall 10 as a cylindrical retaining wall and a bottom slab 11 provided at the lower end of the excavation hole 3. Is fixed to the inner surface of the earth retaining wall 10 surrounding the wall.

  When fixing the side surface of the outer peripheral ring material 7 to the inner surface of the RC underground wall 10 as the inner surface of the excavation hole 3, an embedded metal (not shown) of the RC underground wall 10 is used and welded to the embedded metal. What should I do?

  In the underground space facility 1 according to the present embodiment, the outer peripheral ring member 7 is connected to the inner surface of the excavation hole 3 (the inner surface of the RC underground wall 10), and in this state, the horizontal surface of the inner peripheral ring member 8 is the outer periphery. The annular truss frame 4 is configured to be higher by ΔH than the horizontal surface of the ring material 7.

  That is, the connecting members 9 are arranged in a generally radial manner and are respectively pin-joined with a downward gradient so as to be substantially radial from the inner ring member 8 toward the outer ring member 7.

  In this way, when a vertical load is applied to the inner ring member 8, the inner ring member 8 is deformed so as to be lowered vertically, as can be clearly seen in FIG. No. 9 is deformed so as to rotate from a descending slope to a more nearly horizontal slope.

  As a result, the inner ring member 8 is deformed in a direction in which the diameter D is reduced by ΔD, and thus a compressive force is generated. The connecting member 9 is also deformed in a direction in which the axial length is reduced, and thus a compressive force is generated. .

  Therefore, the vertical load acting on the inner ring member 8 is transmitted to the outer ring member 7 with a horizontal component and a vertical component in the direction of pushing out radially.

  About the vertical component transmitted to the outer periphery ring material 7, since this outer periphery ring material is connected with the inner surface of RC underground wall 10, it is transmitted and supported by this RC underground wall.

  On the other hand, the transmission characteristics of the horizontal component transmitted to the outer ring member 7 differ depending on the relative size difference between the rigidity of the RC underground wall 10 and the ground 2 and the rigidity of the outer ring member 7.

  Here, it is assumed that the rigidity of the RC underground wall 10 and the ground 2 is large. In this case, a compressive force is generated in the outer peripheral ring member 7 and further transmitted to the RC underground wall 10 and the ground 2 spreading on the back surface thereof.

  The radial horizontal component force is stably supported by using the back earth pressure as a reaction force while offsetting the compressive force generated in the RC underground wall 10.

  As described above, according to the underground space facility 1 according to the present embodiment, the outer peripheral ring member 7 is connected to the inner surface of the RC underground wall 10, and in this state, the horizontal surface of the inner peripheral ring member 8 is the outer periphery. Since the annular truss frame 4 is configured to be higher than the horizontal surface of the ring member 7 by ΔH, a column for supporting the load of the annular truss frame 4 is not required, and the underground space in the excavation hole 3 is effectively used. It can be used.

  Such an underground space facility 1 can be used for various purposes such as a plant factory and a rental room because the space becomes a pillar-free space as well as a parking lot, a bicycle parking lot, or a warehouse.

  Although not specifically mentioned in the present embodiment, the downward slope of the connecting member 9, in other words, ΔH with respect to the diameter of the outer ring member 7 or the inner ring member 8, is exaggerated in the drawings for the sake of understanding of the invention. However, I will add that the actual downhill slope is smaller.

  Moreover, although the specific example of the use of the underground space facility 1 was not described in this embodiment, it can be used as a parking lot as shown in FIG. 4, for example.

  In such a modification, the elevating equipment 6 is for raising and lowering the automobile 42 placed on the pallet 41, and the automobile 42 may be sent to the annular truss frame 4 while being placed on the pallet 41.

  In addition, what is necessary is just to select suitably the rotation mechanism which rotates the pallet 41, and its carrying in / out mechanism from a well-known means.

  Although not particularly mentioned in the present embodiment, as shown in FIG. 5, a cylindrical wall body 52 is arranged in the hollow space 5 formed in the center of the annular truss frame 4, and the cylindrical wall body While installing the elevator 6 which is raising / lowering equipment inside, the entrance / exit opening 53 of this elevator may be formed in the cylindrical wall body 52, and the flooring 51 may be laid horizontally on the cyclic | annular truss frame 4. FIG.

  The entrance / exit opening 53 of the elevator 6 is provided with an indoor open / close door 54, and a spacer is interposed on the outer ring member 7 in order to ensure the level of the flooring 51.

  According to such a configuration, it becomes possible for a person to enter and leave the underground space facility and to perform a predetermined work in the underground space facility, for example, as a research facility, particularly a research facility that is preferably not affected by fluctuations in temperature and humidity. Can be used.

  Further, the floor material 51 needs to be laid horizontally on the inclined connecting material 9, but the floor material 51 also contributes to improving the horizontal rigidity of the annular truss frame 4.

  Further, in the present embodiment, the annular truss frame 4 installed in a plurality of stages is not connected in the vertical direction, and thus can be a column-free space. However, a pair of annular truss frames that are partially opposed to each other in the vertical direction are mutually connected. You may make it connect.

  FIG. 6 is a diagram showing such a modification.

  As can be seen from the figure, in this modification, a pair of annular truss frames 4 and 4 that are vertically opposed to each other are connected to each other by a vertical brace frame 9 among the annular truss frames installed in a plurality of stages. The vertical brace frame 9 is provided so as to be sandwiched between the connecting members 9 by using the connecting members 9.

  According to such a configuration, the rigidity of the annular truss frame 4 can be increased in a more three-dimensional form. For example, if the position is in the vicinity of the bottom plate 11 formed at the bottom of the excavation hole 3, the rigidity around the bottom plate 11 is increased. Since it becomes high, the bottom plate 11 can be resisted to the groundwater pressure without making it so thick. Moreover, if it is set as the depth position of the soil layer with high earth pressure or the soil layer (saturated sandy ground) which is easy to liquefy in relation to soil properties, it can counter these with sufficient rigidity. In addition, if the upper loading pressure is set at a large position, a large loading load can be supported with sufficient rigidity.

(Second Embodiment)

  Next, a second embodiment will be described. Note that components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 7 is a diagram showing the underground space facility 1 constructed using the underground space facility construction method according to the present embodiment. In order to construct the underground space facility 1 shown in the figure, as shown in FIG. 7, first, a pile 71 is constructed in the ground 2, and then an RC as an annular earth retaining wall so as not to interfere with the pile. The underground wall 10 is constructed in the ground 2.

  Next, the inner ground surrounded by the RC underground wall 10 is dug to form the excavation hole 3 as the internal space of the RC underground wall, and the annular truss frame 4 is horizontally arranged in a plurality of stages in the excavation hole. Install.

  In this case, the annular truss frame 4 may be constructed in the downward direction while digging down the internal space of the RC underground wall 10, or the annular truss frame is constructed in the upward direction after excavation is completed. It doesn't matter if you do. The former construction method is suitable when the annular truss frame 4 is desired to have the same function as a cut beam. The latter construction method is structured by supporting earth pressure only by the RC underground wall 10. This construction method is suitable for a case where it is independent.

  Next, the lifting equipment 6 is installed in a hollow space formed in the center of the annular truss frame 4, and finally, the upper structure 72 is constructed so as to be connected to the head of the pile 71.

  Since the structure of the annular truss frame 4 has already been described, the description thereof is omitted here.

  According to the construction method of the underground space facility according to the present embodiment, it is possible to construct the underground space facility 1 in the underground portion of the upper structure 72. If the upper structure is an office building or an apartment, the underground space facility 1 can be used for a parking lot, for example, and if the superstructure is a laboratory building, the underground space facility 1 can be used for a storage, a research facility, or a plant factory. If necessary, natural light can be sent into the underground space facility 1 using an optical fiber.

  Although not specifically mentioned in the present embodiment, if the pile 71 and the annular truss frame 4 are connected to each other so that relative movement in the vertical direction is allowed, buckling of the pile 71 can be prevented. It becomes possible. Specifically, a plurality of buckling prevention steel materials may be bridged so as to surround the pile 71 from the outer ring member 7, the inner ring member 8 or the connecting member 9.

  If it does in this way, the pile 71 will be penetrated by the opening enclosed with several steel materials for buckling prevention, side movement will be restrained by this steel material for buckling prevention, and the buckling of the pile 71 will be prevented by extension. It becomes possible to do.

The vertical sectional view of the underground space facility concerning a 1st embodiment. It is a figure of the cyclic | annular truss structure 4 which comprises the underground space facility which concerns on 1st Embodiment, (a) is a top view, (b) is sectional drawing which follows an AA line. It is the figure which showed the effect | action of the cyclic | annular truss structure 4 which comprises the underground space facility which concerns on 1st Embodiment, (a) is sectional drawing, (b) is an arrow line view which follows a BB line. The figure which showed the use of the underground space facility which concerns on 1st Embodiment. It is the figure which showed the modification of the underground space facility which concerns on 1st Embodiment, (a) is a top view, (b) is sectional drawing which follows CC line. It is the figure which showed the modification of the underground space facility which concerns on 1st Embodiment, (a) is sectional drawing, (b) is sectional drawing which follows DD line, (c) is from EE line direction Viewed arrow view. It is a figure of the underground space facility constructed | assembled using the construction method which concerns on 2nd Embodiment, (a) is a top view, (b) is sectional drawing which follows a FF line.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Underground space facility 2 Ground 4 Ring truss mechanism 6 Elevating equipment 7 Outer ring material 8 Inner ring material 9 Connecting material 10 RC underground wall (earth retaining wall)
51 Floor material 52 Cylindrical wall 53 Entrance / exit opening of lifting equipment 71 Pile

Claims (5)

Annular from an outer peripheral ring material, an inner peripheral ring material arranged so as to be concentric with the outer peripheral ring material, and a connecting material in which one end is pin-joined to the outer peripheral ring material and the other end is connected to the inner peripheral ring material. The truss frame is constructed, and the annular truss frame is horizontally installed in a plurality of stages in the excavation hole of the ground, and a lifting device is installed in a hollow space formed in the center of the annular truss frame, The ring material is connected to the inner surface of the excavation hole, and the annular truss frame is configured such that in this state, the horizontal surface of the inner ring material is higher than the horizontal surface of the outer ring material by a predetermined height. An underground space facility characterized by A cylindrical wall body is disposed in a hollow space formed in the center of the annular truss frame, and the elevating equipment is installed inside the cylindrical wall body. The underground space facility according to claim 1, wherein a floor material is laid horizontally on the annular truss frame. The underground space facility according to claim 1 or 2, wherein among the annular truss frames installed in a plurality of stages, a pair of annular truss frames facing each other are connected to each other. A pile is constructed in the ground, an annular earth retaining wall is constructed in the ground so as not to interfere with the pile, and an inner space surrounded by the earth retaining wall is dug down to thereby create an internal space of the earth retaining wall. As an excavation hole is formed, an annular truss frame is horizontally installed in a plurality of stages in the excavation hole, and lifting equipment is installed in a hollow space formed in the center of the annular truss frame, and connected to the head of the pile. A construction method of an underground space facility for constructing an upper structure in the form of: an annular truss frame, an outer ring material, and an inner ring material arranged to be concentric with the outer ring material; One end is composed of the outer ring material, and the other end is connected to the inner ring material by pin connection, and the outer ring material is coupled to the inner surface of the excavation hole, and in this state, the inner ring material The horizontal surface is water of the outer ring material. Construction method of underground facilities, characterized in that than Plane configured to be higher by a predetermined height. The construction method of an underground space facility according to claim 4, wherein the pile and the annular truss frame are connected to each other so as to allow relative movement in the vertical direction.

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