JP5752524B2 - Waterproof structure around the pile - Google Patents

Description

  The present invention relates to a waterproof structure around a pile.

  When an underground structure is constructed below the groundwater level, a waterproof sheet may be laid at the bottom of the underground frame to partition the ground and the frame (see, for example, Patent Document 1). By the way, in the place where the pile was driven in, as shown in FIG. 5, since the pile 100 penetrates the waterproof sheet 110, it is necessary to separately stop the pile head 101 exposed through the pile. In the periphery of the pile head 101, a penetration portion 111 is formed in which the waterproof sheet 110 is formed in a circular shape along the outer peripheral shape of the pile head 101, for example. The pile head 101 protrudes upward from the penetrating part 111, and a large number of strip-shaped waterproof sheets 120 are pasted on the outer peripheral surface thereof in line with each other. The strip-shaped waterproof sheet 120 is bent and pasted on the peripheral edge portion of the penetrating portion 111. Adjacent strip-shaped waterproof sheets 120 are overlapped with each other, and the superposed portion and the peripheral edge of the strip-shaped waterproof sheet 120 are bonded with polymer cement or the like.

JP-A-9-111176

  In the waterproof structure as described above, since a large number of strip-shaped waterproof sheets 120 need to be bonded together in the field, a lot of labor is required for the pasting work, and there are many joints of the strip-shaped waterproof sheets 120, which is also waterproof. There was room for improvement.

  From such a point of view, an object of the present invention is to provide a pile-seat sheet waterproof structure that is easy to construct and highly waterproof.

The invention according to claim 1 for solving such a problem includes a pile head protruding from a bottom surface of a recess formed on a concrete surface, a waterproof sheet laid on the concrete surface and the bottom surface of the recess, and the pile. A waterproof member attached to the head, and the waterproof member includes a cylindrical portion that covers an outer peripheral surface of the pile head, and a flange portion that is integral with the cylindrical portion and protrudes laterally from a lower end of the cylindrical portion. The flange portion is overlaid on the waterproof sheet, and the waterproof member is attached to the outer peripheral surface of the pile head and the surface of the waterproof sheet of the recess via an adhesive. This is a waterproof structure around the pile.

According to such a structure, since the recessed part is formed in the circumference | surroundings of a pile head, the pile length of a pile head and a waterproof member can be ensured, and waterproofness can be improved. Moreover, since the waterproof member formed beforehand provided with the cylinder part and the collar part is affixed, installation of a waterproof member is easy. Furthermore, since the waterproof property is secured by the continuity of the waterproof member, the waterproof property can be maintained even when the pile head is deformed or rotated. Moreover, since the waterproof member is affixed on the outer peripheral surface of a pile head and the surface of the waterproof sheet of a recessed part via an adhesive agent, waterproofness can be improved further.

  The invention according to claim 2 is characterized in that the cylindrical portion is formed by winding a strip-shaped material into a cylindrical shape, and the flange portion is formed by bending a lower portion of the strip-shaped material outward in the radial direction. .

  According to such a structure, since the wrap part of a cylinder part only needs one place, waterproofness can be improved further. Moreover, the formation of the collar portion is easy and sufficient waterproofness can be secured.

  According to the pile-seat sheet waterproof structure according to the present invention, the installation work of the waterproof member is easy and the waterproof property can be enhanced.

It is the perspective view which showed the pile periphery sheet | seat waterproof structure which concerns on embodiment of this invention. It is the figure which showed the pile periphery sheet | seat waterproof structure which concerns on embodiment of this invention, Comprising: (a) is a top view, (b) is sectional drawing. It is the figure which showed the waterproofing member of the pile periphery sheet | seat waterproof structure which concerns on embodiment of this invention, Comprising: (a) is the perspective view which showed the 1st formation process, (b) showed the 2nd formation process. It is a disassembled perspective view. It is the perspective view which showed the other form of the waterproof member. It is the figure which showed the conventional pile periphery sheet | seat waterproof structure, Comprising: (a) is a top view, (b) is sectional drawing.

  Hereinafter, a pile-seat sheet waterproof structure according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the figure, the waterproof member is drawn with a larger thickness dimension so that it can be easily distinguished. The pile-seat sheet waterproofing structure S according to the present embodiment is applied to a case where an underground structure is constructed below the groundwater level. In such a case, since groundwater leaches out from the foundation ground surface, a waterproof sheet 10 is laid on the leveled concrete layer 3 constructed on the foundation ground 2 as shown in FIG. A protective mortar layer 4 having a predetermined thickness is constructed on the waterproof sheet 10. In the place where the pile 15 is driven, a penetration part 11 (see FIG. 2B) is formed in the leveled concrete layer 3 and the waterproof sheet 10, and the pile 15 penetrates the penetration part 11 and the head of the pile 16 projects from the top of the waterproof sheet 10. The penetration part 11 is comprised by the hole formed in the circular shape along the outer periphery shape of the pile head 16, for example.

  The waterproof structure S around the pile is laid on the pile head 16 protruding from the bottom surface 21 of the recess 20 formed on the surface (concrete surface) of the leveled concrete layer 3, and on the surface of the leveled concrete layer 3 and the bottom surface of the recess 20. The waterproof sheet 10 and the waterproof member 30 attached to the pile head 16 are provided.

  As shown in FIGS. 1 and 2, the recess 20 is formed to increase the protruding height dimension of the pile head 16. The recess 20 is formed so as to surround the pile head 16. The recess 20 has a square shape in plan view, and its four corners are chamfered in an arc shape (see FIG. 2A). The peripheral edge of the recess 20 is inclined so as to become deeper as it approaches the pile head 16 (see FIG. 2B), and the waterproof sheet 10 can be smoothly laid on the surface of the recess 20. Yes. The bottom surface 21 of the recess 20 is constructed in parallel with the surface of the leveled concrete layer 3. Note that the planar shape of the recess 20 is not limited to a square, and may be other shapes such as a circle. The recess 20 is formed to a depth of about 10 cm, for example, and the protruding height of the pile head 16 can be secured about 20 cm. Thereby, the lap joint length of the pile head 16 and the waterproof member 30 is ensured.

  The waterproof member 30 includes a cylindrical portion 31 that covers the outer peripheral surface 17 of the pile head 16, and a flange portion 32 that is integral with the cylindrical portion 31 and protrudes laterally from the lower end of the cylindrical portion 31. It has a shape (see FIG. 1). In the present embodiment, the cylindrical portion 31 is formed in a cylindrical shape along the outer peripheral shape of the pile head 16. The flange portion 32 is formed in an annular shape and is overlaid on the waterproof sheet 10 on the bottom surface 21 of the recess 20. The cylinder part 31 is affixed on the outer peripheral surface of the pile head 16 via the adhesive agent. The collar part 32 is affixed on the surface of the waterproof sheet 10 laid on the bottom surface 21 of the recess 20 via an adhesive. The waterproof member 30 is formed in advance by appropriately processing a sheet-like waterproof material in a factory or the like, and is only wound and bonded to the pile head 16 at the construction site.

  The cylindrical portion 31 of the waterproof member 30 is formed by winding a strip-shaped material (sheet-shaped waterproof material) 33 into a cylindrical shape, and the flange portion 32 is formed by bending the lower portion of the strip-shaped material 33 radially outward ( (See FIG. 3). The waterproof member 30 is made of a known material such as a synthetic rubber, a synthetic resin, or an asphalt.

  Next, the formation process of the waterproof member 30 will be described. When forming the waterproof member 30, as shown in FIG. 3A, a mold 34 having the same shape as the outer peripheral shape of the pile head 16 is formed in a factory or a work place. Incisions 35 are formed at a predetermined pitch in the lower part of the belt-like material 33. The cut 35 is formed with the same length as the width dimension (radial length) of the flange portion 32. The upper part where the notch 35 is not formed constitutes the cylindrical part 31. The mold 34 is placed on a flat surface, and the strip material 33 is wound around the outer peripheral surface thereof.

  At this time, as shown in FIG. 3B, the lower portion of the strip 33 is bent outward in the radial direction. Both end portions of the strip 33 are wrapped with a predetermined length. Temporarily fix the wrapped part with adhesive tape. Here, if the lower part of the strip | belt-shaped material 33 is bent to radial direction outer side, the notch 35 will open. Since a plurality of gaps are generated in the portion where the cuts 35 are opened, a plurality of additional pasting pieces 36 are laid so as to cover these gaps. The additional pasting piece 36 is made of a sheet-like waterproof material having a length extending from the distal end position of the collar portion 32 to a substantially intermediate portion in the height direction of the cylindrical portion 31. The additional sticking piece 36 has a width longer than the dimension of the outer peripheral end of the gap, and has a rectangular shape. The additional sticking piece 36 is fixed to the lower portion of the strip 33 (the portion that becomes the flange portion 32) and the outer peripheral surface of the cylindrical portion 31 by an adhesive or heat welding in a state of being bent into an L-shaped cross section. The collar portion 32 of the waterproof member 30 thus formed has a polygonal outer periphery. In addition, the shape of the additional sticking piece 36 is not limited to a quadrangle, For example, you may form the one side of the front end side of the collar part 32 in circular arc shape so that the outer periphery of the collar part 32 may become circular. The hat-shaped waterproof member 30 corresponding to the shape of the pile head 16 at the site is formed by the above process.

  The waterproof member 30 formed in this way is appropriately folded and conveyed to the construction site. At the construction site, the waterproof sheet 10 is first laid around the pile head 16. The waterproof member 30 is brought in with the cylindrical portion 31 open (a state where both end portions of the belt-like material 33 are not bonded), and is wound around the outer peripheral surface so as to surround the pile head 16. And the both ends of the strip | belt-shaped material 33 are wrapped by predetermined length. Here, the flange portion 32 is spread and overlapped on the waterproof sheet 10 on the bottom surface 21 of the recess 20. And the wrapped part of the cylinder part 31 is fixed by an adhesive agent or heat welding. At the same time, the cylindrical portion 31 is attached to the outer peripheral surface of the pile head 16 with an adhesive such as polymer cement. Moreover, the collar part 32 is affixed on the surface of the waterproof sheet 10 of the recessed part 20 via adhesives, such as a polymer cement. The waterproof member 30 is installed in the pile head 16 by the above process (refer FIG. 1 and FIG. 2).

  According to the pile-seat waterproofing structure S configured as described above, since the recess 20 is formed around the pile head 16, the protruding length dimension of the pile head 16 can be increased. Thereby, the lap joint length of the pile head 16 and the waterproof member 30 can be ensured, and waterproofness can be improved. Moreover, since joint processing can be performed below the housing of the underground structure, it is possible to avoid the waterproof sheet 10 that is not a structure being sandwiched in the housing. As a result, the reinforcing bar cover thickness of the housing can be secured.

  Moreover, since the waterproof member 30 formed in advance with the cylindrical portion and the flange portion is attached, the waterproof member 30 can be easily installed on the pile head 16 and the waterproof sheet 10. Furthermore, since the waterproof member 30 ensures waterproofness by the continuity of the strip-shaped material 33, even when the pile head 16 is deformed and rotated, no cracks or gaps are generated in the waterproof member 30, and the waterproof property is maintained. can do. Moreover, since the waterproof member 30 is affixed on the outer peripheral surface of the pile head 16, and the surface of the waterproof sheet 10 of the recessed part 20 via an adhesive agent, waterproofness can be improved further.

  Furthermore, the cylindrical portion 31 is formed by winding the strip-shaped material 33 into a cylindrical shape, and the flange portion 32 is formed by bending the lower portion of the strip-shaped material 33 radially outward so that the lap portion of the cylindrical portion 31 is formed. Since only one place is required, adhesion is only required at one place, waterproofing can be further enhanced, and construction is easy. Moreover, also in the collar part 32, sufficient waterproofness can be ensured by sticking the additional sticking piece 36 in the clearance gap which the notch 35 expanded and generate | occur | produced. In particular, since the additional sticking piece 36 stands up to the outer peripheral surface of the cylindrical portion 31, the base portion of the cut 35 (the inner peripheral side of the flange portion 32) can be reliably covered. Since the additional sticking piece 36 is attached at a factory or the like before being carried into the construction site, the processing accuracy is high and waterproofness can be secured, and the work can be performed efficiently.

  Further, since the waterproof member 30 is formed in advance by matching the strip 33 with the mold 34, it is possible to perform a preliminary watertight test. Furthermore, since the strip | belt-shaped material 33 can follow the outer peripheral surface of various shapes, it can respond | correspond not only to the pile head 16 of circular cross section but to the pile head of various cross-sectional shapes. By changing the size of the additional sticking piece 36 in the collar portion 32, it is possible to deal with gaps of various shapes and sizes.

  As mentioned above, according to the pile periphery sheet | seat waterproof structure S which concerns on this embodiment, while being able to install the waterproof member 30 easily, waterproofness can be improved.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably. For example, in the pile-seat sheet waterproofing structure S in the above embodiment, the waterproof member 30 is formed mainly using the single strip-shaped material 33, but is not limited thereto. For example, the waterproof member may be divided into two halves using two strips, and the waterproof member may be installed by sandwiching the pile head from both sides with the two divided members. In this case, although there are two wrap portions, sufficient waterproofness can be ensured.

  In the above embodiment, the waterproof member 30 is formed by forming the notch 35 in the lower part of the belt-like material 33, bending it outward, and attaching the additional sticking piece 36 to the gap. However, the present invention is not limited to this. For example, a hat-shaped waterproof member 30 ′ (see FIG. 4) having an L-shaped cross section may be integrally formed by pouring synthetic resin into a mold. In this case, it may be installed so as to cover the waterproof member in the form of a ring from above the pile head, and after cutting and opening one place of the waterproof member 30 ′, the portion wound and cut around the pile head You may make it install again, and to install.

  In addition to the above, the waterproof member may be formed by separately forming a cylindrical tube portion and a planar annular flange portion having a predetermined width.

  Moreover, in the said embodiment, although the pile 15 is exhibiting the column shape made from a reinforced concrete, it is not limited to this. For example, a steel pipe or a steel pile may be used. The shape may be other shapes such as a prism shape.

S Pile circumference sheet waterproof structure 10 Waterproof sheet 16 Pile head 20 Recessed part 21 Bottom face 30 Waterproof member 31 Tube part 32 Gutter part 33 Band-shaped material

Claims (2)

A pile head protruding from the bottom of the recess formed on the concrete surface;
A waterproof sheet laid on the concrete surface and the bottom of the recess;
A waterproof member mounted on the pile head,
The waterproof member has a cylinder part that covers the outer peripheral surface of the pile head, and a flange part that is integral with the cylinder part and projects from the lower end of the cylinder part toward the side,
The buttocks are overlaid on the waterproof sheet;
The waterproof structure around the pile, wherein the waterproof member is attached to the outer peripheral surface of the pile head and the surface of the waterproof sheet of the recess through an adhesive. The cylindrical portion is formed by winding a strip-like material into a cylindrical shape,
The pile-around sheet waterproof structure according to claim 1, wherein the flange portion is formed by bending a lower portion of the belt-shaped material outward in a radial direction.

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