JP4428396B2 - Underground structure and its construction method - Google Patents

Underground structure and its construction method Download PDF

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JP4428396B2
JP4428396B2 JP2007113568A JP2007113568A JP4428396B2 JP 4428396 B2 JP4428396 B2 JP 4428396B2 JP 2007113568 A JP2007113568 A JP 2007113568A JP 2007113568 A JP2007113568 A JP 2007113568A JP 4428396 B2 JP4428396 B2 JP 4428396B2
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block
sides
concrete
blocks
sheet pile
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JP2007291849A (en
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勝栄 岡村
伴行 後藤
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羽田コンクリート工業株式会社
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The present invention relates to an underground structure using a wall form block that is filled with concrete in the field, and a construction method thereof .
  Conventionally, as this type, T-type precast blocks are stacked one after another, and the post reinforcing bars protruding from the retaining wall hollow part of the T-type precast block are extended, and the bars are arranged in the retaining wall part of the T-type precast block, There is one in which a side wall is formed by placing cast-in concrete (for example, Patent Document 1). However, in this wall structure, there is a gap between adjacent hollow portions of the retaining wall. Therefore, in order to form the wall body to the width of the hollow wall of the retaining wall, a formwork material must be separately provided outside the wall body. Don't be.
  By the way, in the construction of an underground structure having a wall body, after providing continuous underground walls on both sides of a place where the underground structure is laid, excavation between the continuous underground walls is performed (for example, Patent Document 2). ) There are cases. And since a sheet pile etc. are used for the above-mentioned continuous underground wall, and back earth pressure is added to this sheet pile which becomes this earth retaining wall, in order to prevent the fall of the continuous underground wall depending on the field, Cut beams are provided in multiple stages between the underground walls.
And, in order to construct the wall of the underground structure in the excavation hole as described above by using the cast-in-place concrete, there is a problem that the cutting beam becomes an obstacle in the mold work and the workability is lowered.
Utility Model Registration No. 30513350 (0004th stage) Japanese Patent Laid-Open No. 11-11582 (FIG. 2)
Therefore, an object of the present invention is to provide less susceptible to the constraints imposed by the construction conditions, easily land in the structure in which Ru can be constructed in the field and its construction method.
Further, the invention of claim 1 is an underground structure including a bottom plate portion provided at the bottom portion of the cut hole and a wall body provided along a side surface of the cut hole.
A wall form block that is stacked in the vertical direction and arranged side by side in the wall in the left and right direction, and is filled with concrete to form a wall, and is provided on both sides in the width direction to form the outer surface of the wall And a connecting arm portion that connects the outer surface portions on both sides, and the connecting arm portion is provided on both sides of the outer surface portion, and the wall mold made of precast concrete in which the blocks can be stacked up and down. A frame block ,
A foundation block made of precast concrete provided at a corner portion located between the bottom plate portion and the wall body, and comprising a top surface portion on which the wall form block is stacked and a bottom plate forming surface on which a connecting reinforcing bar protrudes. When,
Use
The bottom slab portion is formed by a cast-in-place concrete portion placed between the foundation blocks on both sides, and the foundation blocks on both sides,
The wall form blocks are stacked in the vertical direction on the foundation block and are arranged in the left-right direction, and concrete is filled between the outer surface portions on both sides to form the wall body .
  According to a second aspect of the present invention, the connecting arm portion is provided on both sides and the center of the outer surface portion.
  Further, the invention of claim 3 is provided with a plurality in the vertical direction.
Further, the invention of claim 4, in the construction method of the earth in the structure according to any one of claims 1 to 3, when providing the wall structure along the sides of the excavation hole, the side surface of the excavation hole The wall formwork blocks are arranged in the horizontal direction and stacked up to a height in the middle of the wall structure, and then filled with concrete, and the stacking of the wall formwork blocks and the filling of the concrete are divided into a plurality of times. This is a method performed every predetermined height.
In the invention of claim 5 , a sheet pile is provided at a side position of the cut hole, and the cut hole is formed by excavating between the sheet piles on both sides, and the earth retaining of the side surface of the cut hole is formed by the sheet pile. This is a method in which a cut beam is provided between upper and lower sheet piles on both sides.
According to the underground structure of claim 1, a bottom slab portion is formed by the cast-in-place concrete portion placed between the foundation blocks on both sides and the foundation blocks on both sides, and the wall mold is formed on the foundation block. arranged in lateral direction together with the pile frame block in the vertical direction, by filling the poured concrete during the outer surface portions on both sides of the wall formwork blocks, each side is constituted by the outer surface of the wall formwork block wall An underground structure with a body can be constructed on site.
Moreover, according to the underground structure of Claim 2, the connection arm part is provided in the both sides and center of the outer surface part.
Moreover, according to the underground structure of Claim 3, the connection arm part is provided with two or more intervals at the up-down direction.
Moreover, according to the underground structure of Claim 1 , a wall structure can be simply constructed in the field using both surfaces of the wall form block for the form .
Further, according to the construction method of claim 4, even in the field where there is to constraints on construction such as providing the like beams cut between the side surface of the cutting hole, a part of the wall structure by stacking the wall formwork block partway after building, remove the cutting beam, stacking the wall formwork blocks over the middle of the wall body, by pouring concrete in a plurality of times in the vertical direction, it can be constructed wall.
Further, according to the construction method of claim 5, subjected to earth retaining sides of the excavation hole through sheet pile, providing a cutting beam between the side of the sheet pile up and down multiple stages.
Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the content of the present invention described in the claims. In addition, all the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by employing a novel structure different from the conventional, non-conventional features the earth in the structure obtained by adding its construction method is obtained, describing respectively the earth in the structure and its construction method .
  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 6 show Reference Example 1 of the present invention. As shown in FIGS. 4 to 5 and the like, a steel sheet pile wall 103 in which a steel sheet pile 102 is continuous is formed on the side surface of the cut hole 101. In actual construction, a steel sheet pile 102 as a sheet pile is formed at the side surface position of the cut hole 101 to form a continuous steel sheet pile wall 103, and then the steel sheet pile walls 103, 103 on both sides are excavated. A cut hole 101 is formed.
  When forming a wall structure at such a site, the wall form block 1 is used. As shown in FIG. 1, the wall formwork block 1 includes an outer plate portion 2 that is an outer surface portion that is larger in the width direction than the vertical direction, and arms that are provided at both ends of the outer plate portion 2 and protrude toward the inner surface side. The outer plate portion 2 has a front rectangular shape and a flat plate shape, and a plurality of reinforcing bars 4 project from the inner surface of the outer plate portion 2, and the reinforcing bar 4 has a width. Arranged in multiple directions above and below the direction. The reinforcing bar 4 is a U-shaped gibber. The upper and lower surfaces 5 and 5 of the outer plate portion 2 and the arm portions 3 and 3 are formed to be horizontal and flat so that the blocks 1 and 1 can be stacked up and down, and are independent in the stacked state. Further, the outer plate portion 2 and the arm portion 3 have the same thickness, and the reinforcing bar protruding dimension that is the distance between the tip of the reinforcing bar 4 and the outer plate portion 2 is larger than the protruding dimension of the arm portion 3. .
  FIG. 2 shows a wall form block 1A for adjustment. This block 1A is approximately half the height of the block 1, and the block 1 is the same as the block 1 except that the reinforcing bars 4 are provided in one stage. It is the same configuration. The blocks 1 and 1A are made of precast concrete. Moreover, you may make it construct | assemble a wall structure using only the block 1A for formwork.
  The underground structure 11 constituting a passage or a water channel uses the blocks 1 and 1A for the wall body 12 thereof. A foundation block 21 made of precast concrete is used for the corner portion 14 located between the bottom slab portion 13 of the structure 11 and the wall body 12.
  The basic block 21 has a substantially L-shaped cross section, and includes an upper surface portion 22 on which the blocks 1 and 1A are overlapped, and a vertical bottom plate forming surface 23 facing the center side of the underground structure 11. Are connected to the upper end of the bottom plate forming surface 23 by a concave saddle curved surface 24. A plurality of connecting reinforcing bars 25 protrude from the upper surface portion 22 and the bottom plate forming surface 23 of the foundation block 21. By embedding these connecting reinforcing bars 25 in the cast-in-place concrete, the concrete of the wall body 12, the concrete of the bottom slab portion 13, and the foundation block 21 are integrated. The blocks 1 and 1A are longer than the base block 21 in the structure length direction.
  Next, the construction method will be described with respect to the construction described above. In the drilled hole 101, cut beams 104, 104A are provided in upper and lower multi-stages between the steel sheet pile walls 103, 103 on both sides (in the figure, two upper and lower stages are provided). (Illustrated). In this example, the steel sheet pile wall 103 is a formwork structure. After the earth retaining of the side surface of the cut hole 101 by the steel sheet pile wall 103, leveling the bottom of the cut hole 101, as a foundation of the underground structure 11, a basic crushed stone layer 105 is provided at the bottom of the cut hole 101, A foundation concrete layer 106 is formed on the foundation crushed stone layer 105 by in-situ concrete, and the upper surface of the foundation concrete layer 106 is formed flat.
  When the foundation is completed in this way, a plurality of foundation blocks 21 are arranged in the length direction of the cut hole 101 on both sides in the width direction of the cut hole 101 with the bottom plate forming surface 23 facing the center. Thereafter, the cast-in-place concrete is cast on the foundation between the foundation blocks 21 on both sides, and the bottom slab portion 13 is formed by integrating the cast-in-place concrete portion 107 and the foundation blocks 21 on both sides. Further, the block 1 is stacked on the foundation block 21, and a predetermined interval is placed between the tip of the arm portion 3 and the steel sheet pile wall 103. Also, the blocks 1, 1 adjacent in the left-right direction abut the end surfaces of the arm portions 3, 3. In this example, the blocks 1 are stacked in four upper and lower stages. First, the blocks 1 are stacked below the lower cut beam 104A. In this case, since the cut beam 104A is at the position of the second block 1 from the bottom, the first block 1 below is arranged. The arranged blocks 1 may be temporarily fixed by appropriate means as necessary until the concrete is filled. When the blocks 1 are arranged below the beam 104A in this way, the cast-in-place concrete 108 is placed between the inner surface of the block 1 and the steel sheet pile wall 103 to the upper height position of the block 1 as shown in FIG. Fill. In this case, the first placement of the concrete in the wall structure and the placement of the concrete in the on-site cast-in concrete portion 107 may be performed simultaneously. When the cast-in-place concrete 108 is hardened to a predetermined strength, a steel sheet pile wall 103 and a lower part of the wall structure in which the concrete 108 and the block 1 are integrated are formed, and a force for pressing the steel sheet pile wall 103 by the lower part of the wall structure. Is obtained. Therefore, the cut beam 104A above the block 1 can be removed, and after removing the cut beam 104A, the block 1 is overlaid under the upper cut beam 104, that is, in this example, the block 1 is the basic block. After being stacked in three steps on 21, the cast-in-place concrete 108 is filled between the block 1 and the steel sheet pile wall 103, and when the concrete 108 is cured to a predetermined strength, the upper beam 104 is removed, Block 1 is overlaid on this removed part, and the upper part of block 1 and steel sheet pile wall 103 is filled with cast-in-place concrete 108, thus forming wall 12 which is a wall structure extending from the bottom of cut hole 101 to the top. To do.
  In the figure, reference numeral 109 denotes a top end block provided on the upper portion of the wall body 12, which is made of precast concrete. Moreover, the upper part of the underground structure 11 may be opened, or may be closed by a lid (not shown). Further, in the perspective view of FIG. 6, the steel sheet pile 102 and the steel sheet pile wall 103 are not shown.
  As described above, in the reference example, the steel sheet pile wall 103, which is a longitudinal formwork structure, is stacked in the vertical direction and arranged side by side in the horizontal direction, and the concrete 108 is disposed between the steel sheet pile wall 103. A wall form block 1 that is filled to form a wall body 12, and includes an outer plate portion 2 that is an outer surface portion that forms one side surface of the wall body 12, and an arm that projects from the inner surface of the outer plate portion 2. Since the blocks 3 and 3 are provided, the block 1 is stacked in the vertical direction along one side surface of the steel sheet pile wall 103 and arranged in the horizontal direction, and is placed between the outer plate portion 2 of the block 1 and the steel sheet pile wall 103 in the field. By filling the concrete 108, a wall body 12 having one side surface constituted by the outer plate portion 2 of the block 1 and the other side surface constituted by a steel sheet pile wall can be constructed on site.
  In this way, in the reference example, the above-mentioned wall form block is stacked in the vertical direction along one side surface of the steel sheet pile wall 103 which is the form frame structure, and is arranged in the left and right direction, and the outer plate part 2 which is the outer surface part. Since the concrete 108 is filled between the steel sheet pile walls 103, the wall body 12 can be easily constructed on site by using one side surface of the block as a mold.
  In this way, in the reference example, when the wall structure 12 is provided along the side surface of the cut hole 101 in the construction method of the underground structure 11 having the wall structure, the side surface of the cut hole 101 is configured. The steel sheet pile wall 103 to be used as a formwork structure, the wall formwork blocks 1 are arranged in the left-right direction along one side of the steel sheet pile wall 103, and are stacked up to a height in the middle of the wall body 12, and then the concrete 108 Since the wall form block 1 is stacked and the concrete 108 is divided into a plurality of times at predetermined heights, there are restrictions on the construction, such as by providing cut beams 104 and 104A between the cut holes 101. Even at the site, after building part of the wall 12 by building up the block 1 partway, the cut beams 104 and 104A are removed, and the block 1 is stacked on the wall 12 on the way, multiple times in the height direction. By placing concrete 108 separately, the wall 12 can be constructed. .
  In addition, as an effect on the reference example, the corner block 14 is formed by arranging the precast concrete base blocks 21 on both the left and right sides, and the blocks 1, 1... , 1... And a steel sheet pile wall 103 which is a formwork structure are filled with concrete 108 to form a wall 12, and cast-in-place concrete 107 is placed between corner portions 14, 14 on both sides. Since the bottom plate portion 13 is formed, the precast concrete block 1 is used for the formwork, the corner portion 14 is used the precast concrete block 21, and these are combined with the cast-in-place concrete 107 and 108 to form the underground structure 11. Construction can be performed easily. Moreover, since the outer-plate part 2 used as a substitute for a mold forms a comparatively thin flat plate shape, it is excellent in carrying workability.
  7 to 8 show a reference example 2 of the present invention. The same reference numerals are given to the same parts as those of the reference example 1, and detailed description thereof is omitted. In this example, as shown in FIG. In addition, the block 1 uses arms 3A, 3A projecting on both sides of the outer plate 2 and the reinforcing bars 4A having individual tips bent in a substantially bowl shape. In the perspective view of FIG. 8, the steel sheet pile 102 and the steel sheet pile wall 103 are not shown.
  As described above, also in the present reference example, the block 1 includes the outer plate portion 2 that is an outer surface portion that forms one side surface of the wall body 12 and the arm portions 3A and 3A that protrude from the inner surface of the outer plate portion 2. Accordingly, the same operations and effects as those of the above-described Reference Example 1 are exhibited in correspondence with claims 1, 3 and 5.
  9 to 13 show a first embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-mentioned reference examples, and detailed description thereof will be omitted. In this example, FIG. As described above, the block 1B is provided with the outer plate portion 2 which is an outer surface portion which is larger in the width direction than the vertical direction on both sides in the width direction, and is provided on both sides of the outer plate portions 2 and 2 to connect the outer plate portions 2 and 2 A plurality of connecting arm portions 6 are provided. A plurality of the connecting arm portions 6 are provided at intervals in the vertical direction. In this example, the connecting arm portions 6 are provided in four stages. The upper and lower surfaces 5 and 5 of the outer plate portions 2 and 2 are formed horizontally and flatly so that the blocks 1 and 1 can be stacked up and down.
  FIG. 10 shows a wall formwork block 1C for adjustment. The block 1C has a shape obtained by dividing the block 1B into two vertically and an outer plate portion provided on both sides in the width direction and forming the outer surface of the wall body. 2 and connecting arm portions 6 and 6 for connecting the outer plate portions 2 and 2 on both sides, and a plurality of connecting arm portions 6 are provided at one place. Moreover, the said outer-plate part 2 and the connection arm part 6 are the same thickness.
  The underground structure 11 constituting a passage or a water channel uses the blocks 1B and 1C for the wall 12 thereof. Further, the foundation block 21 made of precast concrete is used at the corner portion between the bottom plate portion 13 and the wall body 12 of the structure 11.
  Next, the construction method will be described with reference to the construction method. In the excavation hole 101, cut beams 104, 104A are provided in upper and lower stages between the steel sheet pile walls 103, 103 on both sides (up and down two in the figure). Steps are shown). In this example, it is not necessary to use the steel sheet pile wall 103 as a mold. As in the first embodiment, when the foundation is formed at the bottom of the cut hole 101, the base plate forming surface 23 faces the center, and the foundation blocks 21 are arranged on both sides in the width direction of the cut hole 101. Arrange several in the direction. Thereafter, the cast-in-place concrete 107 is placed between the foundation blocks 21 on both sides, and the bottom slab portion 13 is formed by integrating the cast-in-place concrete portion 107 and the foundation blocks 21 on both sides. Further, the block 1B is stacked on the foundation block 21. In this example, the blocks 1B are stacked up and down in four stages, but the blocks 1B are stacked under the beam 104A. In this case, since the cut beam 104A is at the position of the second block 1B from the bottom, the first block 1B below is arranged. The arranged blocks 1B may be temporarily fixed by appropriate means as needed until the concrete is filled. When the blocks 1B are arranged below the cutting beam 104A in this way, the cast-in-place concrete 108 is filled between the outer plate portions 2 and 2 on both sides in the thickness direction of the block 1B to the upper height position of the block 1B. In this case, the first placement of the concrete in the wall structure and the placement of the concrete in the on-site cast-in concrete portion 107 may be performed simultaneously. Further, a backfill material 111 such as earth and sand is filled between the block 1B and the steel sheet pile wall 103 and backfilled. When the cast-in-place concrete 108 is cured to a predetermined strength, the outer plate portions 2 and 2 on both sides in the width direction are used as a formwork, and the wall body 12 in which the arranged block 1B, the concrete 108 and the block 1 are integrated is formed. A lower part is formed, and a force for pressing the steel sheet pile wall 103 by the lower part of the wall body 12 is obtained. Therefore, the cut beam 104A on the block 1B can be removed, and after removing the cut beam 104A, the block 1B is overlaid under the upper cut beam 104, that is, in this example, the block 1B is replaced with the basic block. After being layered on top of 21, the cast-in-place concrete 108 is filled between the outer plate parts 2 and 2 of the block 1 B, and earth and sand are buried between the block 1 B and the steel sheet pile wall 103. When the back material 111 is filled and backfilled, and the concrete 108 is hardened to a predetermined strength, the upper beam 104 is removed, and the block 1B is overlaid on the removed portion, and the block 1B and the steel sheet pile wall 103 are placed on the site. Filled with cast concrete 108, and then backfilled with a backfill material 111 such as earth and sand between the block 1B and the steel sheet pile wall 103, and thus the wall structure extending from the lower part to the upper part of the excavated hole 101 Dripping To form a body 12.
  Therefore, after the wall body 12 is completed, the steel sheet pile 102 may be pulled out as necessary. On the other hand, if cast-in-place concrete is used for the backfill material, the wall body 12 and the steel sheet pile wall 103 are integrated to obtain a wall structure with excellent strength. In this case, the steel sheet pile 102 is not pulled out.
  The upper part of the underground structure 11 may be opened or may be closed by a lid (not shown) or the like. In the perspective view of FIG. 13, the steel sheet pile 102 and the steel sheet pile wall 103 are not shown.
Thus, in this embodiment, in the underground structure 11 including the bottom plate portion 13 provided at the bottom portion of the cut hole 101 and the wall body 12 provided along the side surface of the cut hole 101 in correspondence with the first aspect. A wall form block 1B which is stacked in the vertical direction and arranged side by side in the horizontal direction of the wall and is filled with concrete 108 to form the wall body 12, and is provided on both sides in the width direction, and is provided on the outer surface of the wall body 12 The outer plate portions 2 and 2 as outer surface portions and the connecting arm portions 6 that connect the outer plate portions 2 and 2 on both sides are provided, and the connecting arm portions 6 are provided on both sides of the outer surface portion 2 and block. 1B and 1B are precast concrete wall mold blocks 1B that can be stacked up and down, and provided at the corner located between the bottom plate 13 and the wall body 12, and overlap the wall mold blocks 1B. An upper surface portion 22 and a bottom plate forming surface 23 on which a connecting rebar 25 protrudes. A base block 21 made of precast concrete, and a base plate portion 13 is formed by a cast-in-place concrete portion 107 placed between the foundation blocks 21 and 21 on both sides and the foundation blocks 21 and 21 on both sides. Since the wall form block 1B is stacked up and down on the foundation block 21 and arranged in the left and right direction, the wall 12 is formed by filling concrete between the outer surface portions 2 and 2 on both sides. A bottom slab portion 13 is formed by the cast-in-place concrete portion 107 placed between the foundation blocks 21 and 21 and the foundation blocks 21 and 21 on both sides, and the wall formwork block 1B is moved up and down on the foundation block 21. Is a wall form block 1B that is stacked in the horizontal direction and arranged side by side in the wall left and right direction, and is filled with concrete 108 to form the wall 12 and is formed on both sides in the width direction to form the outer surface of the wall 12 Outside The outer plate portions 2 and 2 that are the surface portions and the connecting arm portions 6 that connect the outer plate portions 2 and 2 on both sides are provided. The connecting arm portions 6 are provided on both sides of the outer surface portion 2 and are blocks 1B and 1B. Since each other can be stacked up and down, the blocks 1B are stacked in the vertical direction and arranged in the left and right direction, and the cast-in-place concrete 108 is filled between the outer plate parts 2 and 2 on both sides of the block 1B. The wall body 12 constituted by the outer plate portions 2 and 2 of 1B can be constructed on site.
  In this way, in this embodiment, a plurality of connecting arm portions 6 are provided at intervals in the vertical direction, corresponding to claim 3.
In this way, in this embodiment, corresponding to claim 1 , the wall form block 1B can be stacked in the vertical direction and arranged in the horizontal direction between the outer plate portions 2 and 2 as the outer surface portions on both sides. Since the concrete 108 is filled, the wall body 12 can be easily constructed on-site by using both sides of the block 1B as a mold.
In this way, in this embodiment, in accordance with Claim 4 , in the underground structure construction method according to any one of Claims 1 to 3, the wall structure is formed along the side surface of the cut hole 101. When the wall 12 is provided, the wall mold blocks 1B are arranged in the left-right direction along the side surface of the cut hole 101 and stacked to a height in the middle of the wall 12, and then filled with concrete 108, Stacking the frame block 1B and filling the concrete 108 are performed several times at predetermined heights, so even if there are construction restrictions such as cutting beams 104, 104A between the side surfaces of the cut hole 101, the block After building up a part of the wall 12 by stacking 1B partway, the cut beams 104 and 104A are removed, and the block 1B is stacked on the wall 12 in the middle, and divided into multiple times in the height direction. Can be constructed.
In this way, in this embodiment, in correspondence with claim 5 , the steel sheet pile 102 as a sheet pile is placed at the side surface position of the cut hole 101, and the cut hole 101 is formed by excavating between the steel sheet piles 102 on both sides. Then, the steel sheet pile wall 103 is used to hold the side surface of the cut hole 101, and the cut beams 104, 104A are provided between the steel sheet pile walls 103, 103 on both sides in multiple stages.
  In addition, since the outer plate portions 2 on both sides serve as a formwork, a wall structure can be easily constructed even in the field where there is no other formwork structure.
  14 to 15 show a second embodiment of the present invention. The same reference numerals are given to the same parts as those in the above-described reference examples and embodiments, and detailed description thereof will be omitted. In this example, FIG. As shown in FIG. 14, the block 1 </ b> B includes the outer plate portions 2 that are outer surface portions that are larger in the width direction than the vertical direction on both sides in the width direction. A plurality of connecting arm portions 6 for connecting 2 and 2 are provided. A plurality of the connecting arm portions 6 are provided at intervals in the vertical direction. In this example, the connecting arm portions 6 are provided in two stages. The upper and lower surfaces 5 and 5 of the outer plate portions 2 and 2 are formed horizontally and flatly so that the blocks 1 and 1 can be stacked up and down.
As described above, also in this embodiment, the block 1B is provided on the both sides in the width direction, the outer surface portions 2 and 2 forming the outer surface of the wall body 12, and the connecting arm portion 6 that connects the outer surface portions 2 and 2 on both sides. with a connecting arm portion 6 is provided on both sides and the center of the outer surface portion 2, 2, the connecting arms 6, because they are more spaced vertically, to claim 1-5 Correspondingly, the same operations and effects as the first embodiment are achieved.
  16 to 17 show a third embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-mentioned reference examples and embodiments, and detailed description thereof will be omitted. In this example, FIG. As shown in FIG. 16, the block 1 </ b> C includes the outer plate portions 2 that are outer surface portions that are larger in the width direction than the vertical direction on both sides in the width direction, and are provided on both sides and the center of the outer plate portions 2 and 2. 2 and 2 are provided. One connecting arm 6 is provided on each of both sides and the center. The upper and lower surfaces 5 and 5 of the outer plate portions 2 and 2 are formed horizontally and flatly so that the blocks 1 and 1 can be stacked up and down. Further, since the outer plate portion 2 of the block 1C has a shape obtained by dividing the outer plate portion 2 of the block 1B into two vertically, when the concrete 108 is filled in the middle of the wall body 12, the height dimension is finely adjusted. It can be carried out.
As described above, also in this embodiment, the block 1B is provided on the both sides in the width direction, the outer surface portions 2 and 2 forming the outer surface of the wall body 12, and the connecting arm portion 6 that connects the outer surface portions 2 and 2 on both sides. the provided, according to claim 1, corresponding to 4 beauty 5, effects comparable to those the second embodiment.
In addition, this invention is not limited to the said Example, Various deformation | transformation implementation is possible. For example, the size and shape of the block can be selected as appropriate. Moreover, what is necessary is just to use the block used for a wall structure by accumulating at least several steps (2 steps) or more . Also, the underground structure, in addition to those completely buried in the ground, also include those an open top. Further, the number and arrangement of the arm portions and the connecting arm portions provided in the block can be selected as appropriate.
As described above, the method of land in the structure that involved in the present invention and its construction is less susceptible to the constraints of the construction conditions, to provide the site with simple and easy to land in the structure in which Ru can be used to construct the construction methods be able to.
It is a perspective view of the block which shows the reference example 1 of this invention. It is a perspective view of the block which has the same height as the same as the block of FIG. 1 same as the above. It is a perspective view of a foundation block same as the above. It is sectional drawing of an underground structure same as the above. It is sectional drawing of the underground structure under construction same as the above. It is a perspective view of the underground structure under construction same as the above. It is a perspective view of the block which shows the reference example 2 of this invention. It is a perspective view of the underground structure under construction same as the above. It is a perspective view of the block which shows 1st Example of this invention. FIG. 10 is a perspective view of a block having the same height as that of the block of FIG. 9. It is sectional drawing of an underground structure same as the above. It is sectional drawing of the underground structure under construction same as the above. It is a perspective view of the underground structure under construction same as the above. It is a perspective view of the block which shows 2nd Example of this invention. It is a perspective view of the underground structure under construction same as the above. It is a perspective view of the block which shows 3rd Example of this invention. It is a perspective view of the underground structure under construction same as the above .
1, 1A Wall formwork block 1B, 1C Wall formwork block 2 Outer plate part (outer surface part)
3 arms 6 connecting arms
11 Underground structures
12 Wall body (wall structure)
21 Basic blocks
22 Top surface
23 Bottom plate forming surface
25 Reinforcing bars
101 Drilling hole
103 Steel sheet pile wall (formwork structure)
107 Cast-in-place concrete section
108 Cast-in-place concrete

Claims (5)

  1. In the underground structure comprising a bottom plate portion provided at the bottom of the excavation hole and a wall provided along the side surface of the excavation hole,
    A wall form block that is stacked in the vertical direction and arranged side by side in the wall in the left and right direction, and is filled with concrete to form a wall, and is provided on both sides in the width direction to form the outer surface of the wall And a connecting arm portion that connects the outer surface portions on both sides, and the connecting arm portion is provided on both sides of the outer surface portion, and the wall mold made of precast concrete in which the blocks can be stacked up and down. A frame block ,
    A foundation block made of precast concrete, provided at a corner portion located between the bottom plate portion and the wall body, and comprising an upper surface portion on which the wall form block is stacked and a bottom plate forming surface on which a connecting reinforcing bar protrudes. When,
    Use
    The bottom slab portion is formed by a cast-in-place concrete portion placed between the foundation blocks on both sides, and the foundation blocks on both sides,
    Ground, characterized in that said arranging the wall formwork blocks on the foundation blocks in the lateral direction together are stacked vertically to form said wall by filling concrete between the sides of the outer surface Structure .
  2. The underground structure according to claim 1, wherein the connecting arm portion is provided on both sides and a center of the outer surface portion.
  3. The underground structure according to claim 1 or 2, wherein a plurality of the connecting arm portions are provided at intervals in the vertical direction.
  4. In construction methods of the earth in the structure according to any one of claims 1 to 3, when providing the wall along the sides of the excavation hole, along the sides of the excavation hole, type for the wall The frame blocks are arranged in the left-right direction and stacked to a height in the middle of the wall structure, and then filled with concrete, and the stacking of the wall form block and the filling of the concrete are performed at predetermined heights in a plurality of times. The construction method of the underground structure that characterizes it.
  5. And pouring a sheet pile on a side surface position of the excavation hole, the excavation hole is formed by drilling between both sides of the sheet pile, subjecting the earth retaining sides of the excavation hole through the sheet pile, between the side of the sheet pile The construction method for an underground structure according to claim 4, wherein the cut beams are provided in upper and lower stages.
JP2007113568A 2007-04-23 2007-04-23 Underground structure and its construction method Expired - Fee Related JP4428396B2 (en)

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JP5611265B2 (en) * 2012-04-09 2014-10-22 ジオスター株式会社 Precast block that is the foundation of the seawall
KR101480360B1 (en) * 2013-08-09 2015-01-09 윤동현 Construction method for underground structure
JP6311381B2 (en) * 2014-03-18 2018-04-18 新日鐵住金株式会社 Flow rate control member
US9575491B1 (en) * 2015-09-03 2017-02-21 Caterpillar Underground Mining Pty Ltd System and method for automated machine operation
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