JP2006090048A - Wall body member of underground hollow structure and construction method of underground hollow structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a precast concrete wall body member and a construction method of an underground hollow structure using its wall body member, for forming a slide slab part of the underground hollow structure, by inserting the wall body member into the unhindering ground in construction in the vicinity of the ground surface, while improving yield strength of the wall body member to an earthquake. <P>SOLUTION: The precast concrete wall body member 10 forms the side slab part of the underground hollow structure by being inserted into the ground; and is characterized in that the wall body member 10 can be divided in the vertical direction after being inserted into the ground. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a wall member made of precast concrete that is inserted into the ground to form a side plate portion of an underground hollow structure, and a method for constructing an underground hollow structure using the wall member.

Conventionally, as a construction method of an underground hollow structure using a precast concrete wall member inserted into the ground to form a side plate portion of the underground hollow structure, the wall member of the underground hollow structure is A method for constructing an underground hollow structure in which both sides of the wall body member are connected with a top plate member made of precast concrete and the bottom is formed by excavating the bottom of the top plate member is known. ing.
JP 2003-193494 A JP 2001-392689 A

  However, in the above-described prior art, the wall member made of precast concrete inserted into the ground extends downward with respect to the bottom of the underground hollow structure, so the wall member is in the vertical direction of the underground hollow structure. Therefore, there is a problem that the strength of the wall member against an earthquake or the like cannot be improved after the construction of the underground hollow structure.

  In addition, after the construction of the underground structure, the upper part of the wall member remains above the underground hollow structure, so that, for example, water or gas, such as water or gas, is placed between the ground and the upper part of the underground hollow structure. There is a problem in that the wall member becomes an obstacle when a buried object is buried.

  The present invention has been made in view of the above situation, and can improve the strength of the wall member against an earthquake or the like, and between the ground and the upper part of the underground hollow structure, A wall member made of precast concrete in which a member is inserted into the ground without interfering with an embedded object to form a side plate portion of the underground hollow structure, and a method for constructing the underground hollow structure using the wall member The purpose is to provide.

  In order to solve the above-described problems, the wall member of the underground hollow structure and the construction method of the underground hollow structure according to the present invention employ the following means.

  That is, the wall member of the underground hollow structure of the invention according to claim 1 is a wall member made of precast concrete that is inserted into the ground to form a side plate portion of the underground hollow structure. It can be divided in the vertical direction after being inserted into the ground.

  The wall member of the underground hollow structure according to the invention of claim 2 is the invention according to claim 1, wherein the wall member is divided in the vertical direction of the wall member. It is connected with the member, It is characterized by the above-mentioned.

  Moreover, after the wall member of the underground hollow structure of Claim 1 or 2 is inserted in the both sides of underground, the construction method of the underground hollow structure of the invention of Claim 3 is carried out between the wall members on both sides. After excavating and connecting the wall body members on both sides by the top plate portion and the bottom plate portion, the connection on both sides of the wall body member above the portion connected by the top plate portion is released, and from the bottom plate portion The connection of the both sides of the said wall body member in the downward direction is cancelled | released, It is characterized by the above-mentioned.

  According to the wall member of the underground hollow structure of the invention of claim 1, the wall member made of precast concrete that is inserted into the ground to form the side plate portion of the underground hollow structure is inserted into the ground. Since it can be divided in the vertical direction later, it is possible to divide the wall body member as needed to divide the length in the vertical direction of the side plate part in the underground hollow structure as necessary. Made of precast concrete that can improve the strength of body members and form side plates of underground hollow structures by inserting wall members near the ground into the ground without interfering with other buried objects The wall member can be provided.

  Moreover, according to the wall member of the underground hollow structure of the invention described in claim 2, since the vertical direction of the wall member is connected by the connecting member, the connection of the connecting member is released and the underground hollow structure is The length of the side plate portion in the up-down direction can be appropriately divided and applied as required.

  Moreover, according to the construction method of the underground hollow structure of invention of Claim 3, after inserting the wall body member of the underground hollow structure of Claim 1 or 2 into both sides in the ground, the wall member of both sides After excavating the space, the wall members on both sides are connected at the top plate portion and the bottom plate portion, and then the connection on both sides of the wall body member above the portion connected by the top plate portion is released, and the bottom plate Since the connection on both sides of the wall member below from the section is released, the wall member can be divided in accordance with the construction of the underground hollow structure.

  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 contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a new underground hollow structure wall body member and underground hollow structure construction method different from the conventional ones, the underground hollow structure wall body member and underground hollow structure unprecedented A construction method is obtained, and the wall member of the underground hollow structure and the construction method of the underground hollow structure are described.

  Embodiments of a wall member for an underground hollow structure and a method for constructing the underground hollow structure according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a wall member 10 of an underground hollow structure according to the present invention. 2A is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 2B is a cross-sectional view taken along the line BB in FIG.

  The wall member 10 made of precast concrete is mainly composed of an upper member 12, a middle member 14, and a lower member 16. The upper member 12 is formed in a substantially rectangular shape when viewed from the front. Further, the upper member 12 is formed in a substantially U shape having an opening on the right side in a top view of the cross section. Further, the bottom surface portion 12a of the upper member 12 is formed in a substantially rectangular shape when viewed from the bottom, and a through hole 12b is formed in the vertical direction. The middle member 14 is formed in a substantially right-tilted elongated shape when viewed from the front. An upper surface portion 14a of the middle member 14 is formed in a substantially rectangular shape when viewed from above, and a through hole 14b is formed in the vertical direction. Further, the middle member 14 is formed in a substantially U shape having an opening on the right side in a top view of the cross section. Further, the bottom surface portion 14c of the middle member 14 is formed in a substantially rectangular shape in a bottom view, and a through hole 14b is formed in the vertical direction. The lower member 16 is formed in a substantially rectangular shape when viewed from the front. Further, the lower member 16 is formed in a substantially U shape having an opening on the right side when viewed from above the cross section. Further, the upper surface portion 16a of the lower member 16 is formed in a substantially rectangular shape when viewed from above, and a through hole 16b is formed in the vertical direction. Further, the bottom surface portion 12a of the upper member 12 and the upper surface portion 14a of the middle member 14 and the bottom surface portion 14a of the middle member 14 and the upper surface portion 16a of the lower member 16 are coupled by a coupling member 18. Examples of the connecting member 18 include a bolt member such as a PC steel material that penetrates the through hole 12b and the through hole 14b, or the through hole 14b and the through hole 16b, and a nut.

  Next, a method for constructing an underground hollow structure using the wall member 10 of the underground hollow structure configured as described above will be described.

  First, as shown in FIG. 3, the wall member 10 of the underground hollow structure is struck by hitting the upper surface of the wall member 10 at a predetermined interval in the left-right direction, or is excavated from the ground G and inserted into the ground. The

  Next, as shown in FIG. 4, a predetermined distance is excavated between the pair of wall members 10 inserted into the ground in the vertical direction so as to expose the upper divided portion of the pair of wall members 10.

  Next, as shown in FIG. 5, a top plate portion 22 is provided between the upper surface portions 14a and 14a, and the top plate portion 22 is made of a precast concrete member or made of cast-in-place concrete.

  Next, as shown in FIG. 6, the space between the pair of wall body members 10 is excavated below the top plate portion 22 and between the pair of wall body members 10. Then, as shown in FIG. 7, the lower part between the pair of wall members 10 is connected by a substantially flat bottom plate part 24. The bottom plate portion 24 can be formed by arranging precast concrete members side by side, or can be formed by in-situ concrete.

  After the top plate portion 22 and the bottom plate portion 24 are provided, as shown in FIG. 8, the upper and lower connections of the pair of wall members 10 are released by pulling the bolt member 18a of the connecting member 18 upward. In addition, if the nut 18b is fixed to prevent rotation, the nut 18b can be removed by turning the bolt member 18a. Thus, after the top plate portion 22 and the bottom plate portion 24 are constructed, the top plate portion 22 and the bottom plate portion 24 act as cutting beams, so the upper member 12 and the middle member 14, and the middle member 14 and the lower member 16 The connection can be released.

  After the top plate portion 22 is attached and the upper member 12 is removed, the upper portion of the top plate portion 22 is backfilled with the ground G.

  Further, in this example, after the top plate portion 22 is constructed, the bottom plate portion 24 is constructed. However, after the bottom plate portion 24 is constructed by excavating the wall members 10 and 10 to the bottom plate portion 24 position, 22 may be constructed, and then the upper and lower connections of the pair of wall members 10 may be released.

  The underground hollow structure which is a box culvert is formed by the above-described construction method of the underground hollow structure.

  As described above, according to the present embodiment, the wall member 10 made of precast concrete that is inserted into the ground to form the side plate portion of the underground hollow structure can be divided in the vertical direction after being inserted into the ground. Since the wall member 10 can be appropriately divided and constructed as necessary in the vertical length of the side plate portion in the underground hollow structure, the wall against earthquakes and the like after the construction of the underground hollow structure The side plate of the underground hollow structure can be improved by improving the strength of the body member 10 and the wall body member 10 near the ground G is inserted into the ground so as not to interfere with the construction of the buried object near the ground G. The wall member 10 made of precast concrete forming the portion can be provided.

  Further, according to the present embodiment, since the vertical direction of the wall member 10 is connected by the connecting member 18, the length of the side plate portion in the underground hollow structure is released by releasing the connection of the connecting member 18. As necessary, the wall member 10 can be divided and constructed as appropriate.

  Moreover, according to this embodiment, after inserting the wall member 10 of the underground hollow structure of Claim 1 or 2 into both sides in the ground, it excavates between the wall members 10 and 10 on both sides, After the wall members 10 and 10 are connected by the top plate portion 22 and the bottom plate portion 24, the connection between the both sides of the wall member 10 above the portion connected by the top plate portion 22 is released, and the bottom plate portion 22 Therefore, the wall member 10 can be divided in accordance with the construction of the underground hollow structure.

  9 and 10 show a second embodiment of the present invention. The same reference numerals are given to the same portions as those of the first embodiment, and detailed description thereof will be omitted. In this example, as shown in FIG. The pair of wall members 10 inserted in the ground is excavated a predetermined distance in the vertical direction to expose the upper part of the pair of wall members 10 in the vertical direction, and a mold 31 is provided at the bottom of the excavation, Concrete is placed between the upper surface portions 14a and 14a, and a top plate portion 22A is integrally formed on the upper surface portions 14a and 14a.

  After forming the top plate portion 22A by the cast-in-place concrete in this way, the lower portion of the top plate portion 22A is excavated, the formwork 31 is removed, and the upper surface portion 16a is excavated, as shown in FIG. The bottom plate portion 24 is formed. Further, after the top plate portion 22A and the bottom plate portion 24 are formed, the upper member 12 and the lower member 16 of the pair of wall members 10 can be removed by releasing the connection between the upper and lower portions of the pair of wall members 10. it can. In this example, since the top plate portion 22A is provided between the upper surface portions 14a and 14a of the middle members 14 and 14, the upper member 12 is not refilled to the top of the top plate portion 22A after the construction of the underground hollow structure. In addition, the connection with the middle member 14 may be released and removed.

  11 and 12 show a third embodiment of the present invention, where the same reference numerals are given to the same portions as those of the first embodiment, and detailed description thereof is omitted. In this example, the connecting member 18 is A bolt member 18a with both screws and nuts 18b and 18b screwed to both ends of the bolt member 18a. Since the nuts 18b and 18b are provided on both ends of the bolt member 18a in this way, the nut can be seen from above and below. The nuts 18b and 18b can be loosened and the bolt member 18a can be pulled out, so that the workability for releasing the connection is improved.

  Further, the cross-sectional shape of the portion excluding the bottom surface portion 12a of the upper member 12, the portion excluding the upper surface portion 14a and the bottom surface portion 14c of the middle member 14, and the portion excluding the upper surface portion 16a of the lower member 16 is shown in FIG. As shown, it has a shape having a center hole 19 inside a square. In addition, the inner surface portion in the vicinity of the bottom surface portion 12a of the upper member 12, the inner surface portion in the vicinity of the upper surface portion 14a and the bottom surface portion 14c of the middle member 14, and the inner surface portion in the vicinity of the upper surface portion 16a of the lower member 16 are An operation hole 20 is provided, and an operation of turning the nut 18b and an operation of extracting the bolt member 18a from the operation hole 20 can be performed.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention.

It is a figure explaining the construction method of the wall body member and underground hollow structure of an underground hollow structure which concern on Example 1 of this invention. 2A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 2B is a cross-sectional view taken along line BB in FIG. It is a figure explaining one Embodiment of the construction method of an underground hollow structure same as the above. It is a figure explaining one Embodiment of the construction method of an underground hollow structure same as the above. It is a figure explaining one Embodiment of the construction method of an underground hollow structure same as the above. It is a figure explaining one Embodiment of the construction method of an underground hollow structure same as the above. It is a figure explaining one Embodiment of the construction method of an underground hollow structure same as the above. It is a figure explaining one Embodiment of the construction method of an underground hollow structure same as the above. It is a figure explaining one Embodiment of the construction method of the underground hollow structure which shows Example 2 of this invention. It is a figure explaining one Embodiment of the construction method of an underground hollow structure same as the above. It is a figure explaining one Embodiment of the construction method of the underground hollow structure which shows Example 3 of this invention. FIG. 12 is a cross-sectional view taken along line CC of FIG. 11.

Explanation of symbols

10 Wall member
18 Connecting members
22,22A Top plate
24 Bottom plate

Claims (3)

In the wall member made of precast concrete that is inserted into the ground and forms the side plate portion of the underground hollow structure,
The wall member according to claim 1, wherein the wall member can be divided in the vertical direction after being inserted into the ground.   The wall member of the underground hollow structure according to claim 1, wherein a portion of the wall member divided in the vertical direction is connected by a connecting member in the vertical direction of the wall member. After the wall member of the underground hollow structure according to claim 1 or 2 is inserted on both sides of the ground, the wall members on both sides are excavated, and the wall members on both sides are connected by the top plate portion and the bottom plate portion. And then releasing the connection on both sides of the wall body member above from the portion connected by the top plate portion and releasing the connection on both sides of the wall member below from the bottom plate portion. Construction method for underground hollow structures.

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