JP2006257732A - Protective material of waterproofing layer and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective material of a waterproofing layer capable of having no fear to impair the waterproofing layer or the like when a structure moves and having high workability and safety in the case of carrying out construction work. <P>SOLUTION: The protective material 1 of the waterproofing layer is so constructed that the protective material 1 of the waterproofing layer is installed for the waterproof layer 4 provided across two structures in an underground connection section of the structure 2 and the structure 3. The protective material 1 is formed by adhesively fixing two buffer sections 1b constituted of an elastic body to a protective plate 1a. The protective material 1 is fixed to the structure 2 and the structure 3 by respectively adhering two buffers 1b to the structure 2 and the structure 3. After the protective material 1 is fixed, back filling soil 7 is repeatedly carried out by back filling and rolling around the structures 2 and 3 and the protective material 1 by a heavy machine to bury and harden it up to a predetermined height. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a protective material for a waterproof layer provided at a connection portion between two structures in the underground and a method for constructing the same. Specifically, it is equipped with a protection plate part that protects the waterproof layer and a buffer part composed of an elastic body, and by adhering this buffer part to each structure, it can follow the movement of the structure during an earthquake, etc. At the same time, by fixing the protective material to the structure, it is possible to improve workability and safety at the time of construction by eliminating the need for temporary pressing during the soil backfilling operation.

  When constructing a structure in a power plant or the like, a plurality of structures are constructed because earthquake countermeasures differ depending on the purpose of use.

  In the underground connection part of each of these structures, a waterproof layer is provided between the two structures in order to prevent infiltration of groundwater into the underground connection part. In order to prevent this waterproof layer from being damaged by backfilling soil during construction and from being damaged by earth pressure, a protective material is also provided.

  FIG. 5 is a cross-sectional view showing a conventional protective material 54 for a waterproof layer, and shows a state where the protective material 54 is cut at an underground height.

  The conventional protective material 54 is provided in the connection part in the part buried under the structure 50 and the structure 51 which are adjacent structures. An outer wall waterproofing member 52 composed of an outer wall waterproofing layer 52a and an outer wall protecting material 52b is provided on the underground outer wall of the structure 50 and the structure 51, and the underground connection between the structure 50 and the structure 51 is provided. The part is provided with a waterproof layer 53.

  The waterproof layer 53, the outer wall waterproof layer 52a, the outer wall protective material 52b, and the conventional protective material 54 are constructed by the following method.

  First, the waterproof layer 53 is attached to the connection portion between the structure 50 and the structure 51. The waterproof layer 53 is a laminate of an asphalt waterproof layer and a copper plate. Thereafter, the outer wall waterproof layer 52a is attached to the structure 50 and the structure 51 by a self-adhesion method or the like, and the outer wall protective material 52b is attached to the structure 50 and the structure 51 from the surface of the outer wall waterproof layer 52a.

  Thereafter, the protective material 54 composed of the protective plate 54 a and the buffer material 54 b is installed at the connection portion of the structure 50 and the structure 51 so as to cover the waterproof layer 53. The protection plate 54a is made of a cement plate or the like, and the buffer material 54b is made of foamed polystyrene or the like.

  Here, when the protective material 54 is fixed to the outer wall waterproofing member 52 of the structure 50 and the structure 51 by adhesion or the like, the protective material 54 is moved when the structure 50 and the structure 51 move during an earthquake or the like. However, since it cannot follow the movement of the structure 50 and the structure 51, there exists a possibility that the outer wall waterproofing member 52 may be damaged at the bonding portion with the protective material 54. For this reason, the protective material 54 is not fixed to the structure 50 and the structure 51 by adhesion or the like, and the backfilling and rolling of the backfilling soil 55 are performed by the heavy machinery in a state where the protective material 54 is temporarily pressed. Repeat until 55 reaches a predetermined height.

  In addition to the above, there has been proposed a protective concrete having a waterproof layer that prevents the occurrence of local swelling due to expansion and contraction due to heat (see, for example, Patent Document 1).

  The protective concrete of the waterproof layer disclosed in Patent Document 1 is provided with an absorption joint and an elastic joint material in the protective concrete layer provided on the upper part of the waterproof layer, so that local swelling due to expansion and contraction due to heat of the protective concrete is achieved. It prevents the occurrence.

JP 05-113023 A

  However, with the protective material of the conventional waterproof layer provided in the underground connection part of two structures, when the protective material is bonded and fixed to the structure, the protective material cannot follow the movement of the structure when the structure moves. In addition, the outer wall waterproofing member may be damaged by the adhesive surface with the protective material. For this reason, the protective material cannot be fixed to the structure by adhesion or the like, and it is necessary to temporarily hold the protective material when refilling and rolling the soil, and workability and safety during construction There was a problem.

  Also, with the conventional waterproof layer protective material, the outer wall waterproof member may be damaged due to collision with the protective material because the protective material cannot follow the movement of the structure when the structure moves during an earthquake, etc. was there.

  Moreover, in the protective material of the conventional waterproof layer, since there is no adhesion between the protective material and the structure, there may be a gap between the structure and the protective material, and the backfill soil was covered with the protective material. There was a risk of getting inside.

  Moreover, the protective concrete of the waterproof layer proposed in Patent Document 1 is configured to be directly installed on the upper part of the waterproof layer for the purpose of protecting the waterproof layer such as the roof, and the underground connection portion of the structure It cannot be applied to the protection of the waterproof layer provided in the case.

  The present invention has been made to solve such problems, and prevents damage to the outer wall waterproofing member and the waterproof layer, improves workability and safety during construction, and prevents backfill soil from entering. It aims at providing the protective material of the waterproof layer which prevents, and its construction method.

  In order to solve the above-described problems, the protective material for the waterproof layer according to the present invention protects the waterproof layer provided between the two structures at a portion buried in the basement of the two adjacent structures. The material includes a protection plate portion and a buffer portion formed of an elastic body and bonded to the protection plate portion, and the outer wall portion provided with a waterproof member of each structure is bonded to the buffer portion to protect the waterproof layer. The protective plate portion is covered with a plate portion and bonded and fixed to each structure through a buffer portion.

  The protective material for the waterproof layer according to the present invention is a structure in which the protection plate portion covers the waterproof layer by adhering the buffer portion made of an elastic body to the outer wall portion of each structure including the waterproof member. When the structure is moved during an earthquake or the like, the elastic body of the buffer portion is deformed to follow the movement of the structure.

  In order to solve the above-described problems, the waterproof layer protective material construction method according to the present invention is a waterproofing provided between two structures at a portion buried in the basement of two adjacent structures. In the construction method of the protective material of the layer, the buffer part constituted by the elastic body is adhered to the protective plate part, the protective material is formed, the outer wall part provided with the waterproof member of each structure, and the buffer part. Bonding, covering the waterproof layer with a protective plate, fixing the protective plate part to each structure via a buffer part, and filling backfill soil around the structure and protective material It is.

  In the construction method of the protective material for the waterproof layer according to the present invention, the buffer portion made of an elastic body is bonded to the protective plate portion to form the protective material. Thereafter, the buffer member is bonded to the outer wall portion of each structure including the waterproof member, so that the protective material is fixed to the structure.

  Thereafter, the backfilling soil is filled up to a predetermined height around the structure and the protective material by repeated backfilling and rolling.

  According to the protective material of the waterproof layer of the present invention, when the structure is moved during an earthquake or the like by including the buffer portion made of an elastic body and bonding the buffer portion to the outer wall portion of each structure. In addition, the buffer portion constituted by the elastic body is deformed to follow the movement of the structure, and the waterproof member on the outer wall portion of the structure due to the protective material can be prevented from being damaged.

  Furthermore, because the buffer part is bonded to the outer wall part of each structure, it is possible to fix the protective material to the structure, so there is no need for temporary holding during soil backfilling work. Improvement of workability and safety can be realized.

  Furthermore, since the gap between the buffer portion and the outer wall portion of each structure is bonded, no gap is generated between the buffer portion and the structure, so that the backfill soil enters the interior covered with the protective material. Can be prevented.

  According to the construction method of the protective material of the waterproof layer of the present invention, the waterproof layer provided with a buffer portion constituted by an elastic body so that it can follow the movement of the structure when the structure moves during an earthquake or the like. By using the protective material and bonding the buffer portion to the outer wall portion of each structure, the protective material can be fixed to the structure. Thereby, there is no need for temporary holding during the soil backfilling operation, and improvement in workability and safety during construction can be realized.

  In addition, by performing the backfilling operation after bonding the buffer part and the outer wall part of each structure, there is no gap between the buffering part and the structure, so that the backfilling soil is covered with a protective material during the backfilling operation. Can be prevented from entering inside.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a waterproof layer protective material and a waterproof layer protective material construction method of the present invention will be described with reference to the drawings.

<Configuration example of protective material for waterproof layer of this embodiment>
FIG. 1 is a cross-sectional view showing an example of a protective material 1 for a waterproof layer according to the present embodiment, and shows a state where the protective material 1 is cut at a height in the ground. Moreover, FIG. 2 is an exploded perspective view showing an example of the protective material 1 of the waterproof layer of the present embodiment, in a state where it is cut at a height in the ground, the protective material 1 described later, the structure 2 and The state of the underground connection part of the structure 3 is shown.

  The protective material 1 of the waterproof layer of this Embodiment is provided in the connection part in the part buried under the structure 2 and the structure 3 which are adjacent structures. An outer wall waterproofing member 5 is provided on the underground outer walls of the structures 2 and 3, and a waterproof layer 4 is provided at the underground connection portions of the structures 2 and 3 to prevent ingress of groundwater. ing.

  The waterproof layer 4 is provided between the structure 2 and the structure 3. The waterproof layer 4 is formed by superposing an asphalt waterproof layer and a copper plate, for example.

  The outer wall waterproofing member 5 is composed of an outer wall waterproofing layer 5a, an outer wall protecting material 5b, and the like, and is provided on the underground outer wall of the structure 2 and the structure 3. The outer wall waterproof layer 5a is made of, for example, a modified asphalt sheet, and the outer wall protective material 5b is made of, for example, an asphalt waterproof protective plate.

  The protective material 1 includes a protective plate 1a for protecting the waterproof layer 4, and two buffer materials 1b that are made of an elastic body and bonded to the protective plate 1a. The protection plate 1a is an example of a protection plate part, and the buffer material 1b is an example of a buffer part.

  The protection plate 1a and the buffer material 1b have a predetermined length according to the height of the portion buried in the basement of the waterproof layer 4. The protective plate 1a is made of, for example, a cement plate, and the cushioning material 1b is made of, for example, rubber.

  The protective material 1 is fixed to the structure 2 and the structure 3 by the protective plate 1a covering the waterproof layer 4 and the two cushioning materials 1b being bonded to the outer wall portions of the structure 2 and the structure 3, respectively. The

  The backfill soil 7 is filled up to a predetermined height around the structure 2, the structure 3, and the protective material 1.

  In the protective material 1, the cushioning material 1 b is formed of an elastic body, so that when the structure 2 and the structure 3 are moved during an earthquake or the like, the cushioning material 1 b is deformed to cause the structure 2 and the structure. 3 can be followed.

  Therefore, as described in FIG. 5, the outer wall portion waterproofing is different from the conventional waterproof layer protective material 54 that may collide with the outer wall waterproofing member 52 when the structure 50 and the structure 51 move. There is no fear of damaging the member 5.

  Further, as described with reference to FIG. 5, the outer wall portions of the buffer material 1 b, the structure 2, and the structure 3 are fixed by bonding, respectively, as described in FIG. 5. Unlike the conventional protective material 54 of the waterproof layer that is not fixed by adhesion, there is no gap between the protective material 1, the structure 2, and the structure 3, so that the backfill soil 7 is covered with the protective material 1. There is no risk of getting inside.

  The protective material 1 may be configured such that the protective plate 1a is bonded and fixed to the structure 2 and the structure 3 via the integrally formed cushioning material 1b. However, in the protective material 1 of the waterproof layer of the present embodiment, the structure 1 The cushioning material 1b is provided independently with respect to the thing 2 and the structure 3. FIG. Thereby, compared with the case where the integral shock absorbing material 1b is provided with respect to two structures, when the structure 2 and the structure 3 move, it is by the shock absorbing material 1b with respect to the movement of the structure 2 and the structure 3. Improved follow-up performance. Moreover, compared with the case where the integral shock absorbing material 1b is provided, manufacture of the shock absorbing material 1b at low cost is enabled.

  FIG. 3 shows a configuration example of the protective material 1 of the waterproof layer according to another embodiment, and is applied when the underground connection portions of two structures are configured at right angles. By forming the protection plate 1a in an L shape, it corresponds to an underground connection portion of a structure configured at a right angle.

<Example of construction method of protective material for waterproof layer of this embodiment>
Next, an example of a construction method of the protective material 1 for the waterproof layer having the configuration described in FIG. 1 and the like will be described.
FIG. 4 shows a state in which the protective material 1 is fixed to the underground connection portions of the structures 2 and 3. FIG. 4A is a cross-sectional view in a state of being cut at a height in the ground, and FIG. 4B is a cross-sectional view taken along the line AA in FIG.

  As shown in FIG. 4B, the structure 2 and the structure 3 are constructed on the foundation bottom 8 in the excavated ground. The foundation bottom 8 is, for example, leveled concrete or artificial rock. Before construction of the protective material 1, the waterproof layer 4, the outer wall waterproofing member 5, and the water stop plate 6 are constructed in the underground connection portion of the structure 2 and the structure 3 as follows.

  The water stop plate 6 is provided to straddle the two structures inside the connection portion of the two structures when placing the concrete structures of the structures 2 and 3. The water stop plate 6 is made of, for example, rubber.

  After construction of the frame concrete of the structures 2 and 3, the waterproof layer 4 is provided between the two structures in order to prevent infiltration of groundwater into the underground connection part of the two structures. The waterproof layer 4 is formed by superposing an asphalt waterproof layer and a copper plate, for example.

  Further, the outer wall waterproofing member 5 composed of the outer wall waterproofing layer 5a and the outer wall protective material 5b is provided on the outer wall of the structures 2 and 3 in order to prevent the ingress of groundwater into the respective structures. Provide.

  First, the outer wall waterproof layer 5a is attached to the outer walls of the structures 2 and 3 by a self-adhesive method or the like. The outer wall waterproof layer 5a is made of, for example, a modified asphalt sheet. In order to prevent the outer wall waterproofing layer 5a from being damaged by backfilling soil during construction and from being damaged by earth pressure, the outer wall protecting material 5b is attached from the surface of the outer wall waterproofing layer 5a. The outer wall protection material 5b is made of, for example, an asphalt waterproof protection plate.

  Further, as shown in FIG. 4B, a protective mortar 9 for preventing damage to the outer wall waterproofing member 5 is placed on the upper portion of the foundation bottom base 8.

  The protective material 1 is formed by bonding and fixing two buffer portions 1b made of an elastic body to the protective plate 1a.

  The protective material 1 of the waterproof layer is fixed to the underground connection portion of the structure 2 and the structure 3 provided with the waterproof layer 4, the outer wall waterproof member 5, the water blocking plate 6, and the like.

  The protective material 1 is fixed to the structure 2 and the structure 3 by bonding the two buffer materials 1b to the structure 2 and the structure 3, respectively.

  Since the cushioning material 1b of the protective material 1 is composed of an elastic body, when the structure 2 and the structure 3 are moved during an earthquake or the like, the cushioning material 1b is deformed to deform the structure 2 and the structure 3. The movement can be followed and there is no fear of damage to the outer wall waterproofing member 5 by the protective material 1.

  For this reason, the protective material 1 can be fixed to the structure 2 and the structure 3 by bonding the buffer material 1b to the outer wall portions of the structure 2 and the structure 3.

  After the protective material 1 is bonded and fixed to the structure 2 and the structure 3, backfilling and rolling by a heavy machine are repeated, and the backfilling soil 7 is buried in the space B of FIG. 4B to a predetermined height.

  Since the protective material 1 is fixed to the structure 2 and the structure 3, there is no need to temporarily hold the protective material 1 during the backfilling operation by heavy machinery, and as described with reference to FIG. Compared with the conventional construction method of the protective material 54 of the waterproof layer that requires temporary holding at the time of backfilling 55, the workability and safety during construction are improved.

  INDUSTRIAL APPLICABILITY The present invention is applied to a protective material for a waterproof layer provided at an underground connection between two structures in a structure constructed at a power plant or the like.

It is sectional drawing which shows the example of the protective material of the waterproof layer of this Embodiment. It is a disassembled perspective view which shows the example of the protective material of the waterproof layer of this Embodiment. It is sectional drawing which shows the other example of the protective material of the waterproof layer of this Embodiment. It is a block diagram which shows the state which fixed the protective material. It is sectional drawing which shows the protective material of the conventional waterproof layer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Protective material 1a Protective plate 1b Buffer material 2 Structure 3 Structure 4 Waterproof layer 5 Outer wall waterproofing member 5a Outer wall waterproofing layer 5b Outer wall protective material 6 Water blocking plate 7 Backfill soil

Claims (4)

In the protective material of the waterproof layer provided across the two structures at the part buried in the basement of the two adjacent structures,
A protective plate,
Comprising a buffer part composed of an elastic body and bonded to the protective plate part;
The outer wall portion where the waterproof member of each structure is provided and the buffer portion are bonded, the waterproof layer is covered with the protective plate portion, and the protective plate portion is connected to the structure via the buffer portion. A protective material for a waterproof layer characterized by being adhered and fixed to an object.   The protective material for a waterproof layer according to claim 1, wherein the elastic body is rubber.   The protective material for a waterproof layer according to claim 1 or 2, wherein the buffer portion is provided independently for the two structures. In the construction method of the protective material for the waterproof layer provided across the two structures at the part buried in the basement of the two adjacent structures,
Adhering a buffer portion constituted by an elastic body to a protective plate portion, forming the protective material,
The outer wall portion provided with the waterproof member of each structure and the buffer portion are bonded, the waterproof layer is covered with the protective plate, and the protective plate portion is connected to the structure via the buffer portion. Glue and fix to
A method for constructing a protective material for a waterproof layer, wherein a backfill soil is buried around the structure and the protective material.

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