JP2007009495A - Civil engineering structure and external cladding construction member for civil engineering structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an external cladding construction member for a civil engineering structure which can inhibit a cement-hardened material layer from coming off by effectively restraining a foamed resin block from being melt by external heat generated from a fire etc., without impairing lightweight properties and economical efficiency. <P>SOLUTION: In this external-facing construction member 3 which is constituted by forming the cement-hardened material layer 6 on at least one surface of the foamed resin block 5, a plurality of protrusions 8 for intruding into the block 5 are integrally formed at proper intervals on the layer 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a civil engineering structure and an exterior construction member for a civil engineering structure, and in particular, without impairing lightness and economy, can effectively suppress thermal melting of the foamed resin block due to heat such as fire, The present invention relates to a civil engineering structure and an exterior construction member for a civil engineering structure.

  When construction is performed in a poor environment such as a soft ground area, a place with heavy traffic, or in a narrow environment, a construction member (main construction member) made of foamed resin blocks is piled up in order to reduce the labor and the construction time. In addition, a foamed resin building member constituting the outer surface of the foamed resin block in which a hardened cement layer is formed on at least one surface (exterior building member) is disposed on the outer surface. A civil engineering structure is known in which the resistance to heat from the outside and the strength against foreign matters such as gravel are increased by arranging them as described above (for example, Patent Document 1).

Utility Model Registration No. 2607192

  However, in the civil engineering structure (roads and platforms) shown in Patent Document 1, the hardened cement layer of the exterior construction member constituting the wall surface is in direct contact with the internal foamed resin block or via an adhesive. Therefore, when a fire or the like occurs near the wall surface of the civil engineering structure and the wall surface is exposed to direct fire or high temperature, the heat (hereinafter referred to as external heat) is transferred to the hardened cement layer. Then, the foamed resin block inside is heated, and the foamed resin block is greatly melted by heat. In some cases, the hardened cement material layer may fall off, and the heat resistance as the civil engineering structure may be reduced at a time. there were.

  In order to prevent thermal melting of the foamed resin block due to external heat, it is conceivable to increase the thickness of the hardened cement layer sufficiently. In this case, however, the weight of the exterior construction member is increased and transported accordingly. Not only does it require labor and construction labor, but a significant increase in the weight of the wall has a concern of reducing the seismic performance of the civil engineering structure. In addition, it is considered effective to interpose another member excellent in heat resistance and heat insulation between the cured cement layer and the foamed resin block, but in general, such heat resistance and heat insulation are excellent. Since the member is expensive and the manufacturing process of the exterior construction member is complicated, the manufacturing cost increases and there is a problem in economy.

  The present invention has been made in view of the problems of the background art described above, and its purpose is to effectively heat-melt the foamed resin block by external heat such as a fire without impairing lightness and economy. An object of the present invention is to provide a civil engineering structure and an exterior construction member for a civil engineering structure that can prevent the cement hardened material layer from falling off.

In order to achieve the above object, in the civil engineering structure according to claim 1, an exterior construction member formed by stacking main construction members made of foamed resin blocks and forming a cement hardened material layer on at least one surface of the foamed resin blocks. In the civil engineering structure that is constructed on the outside of the stacked main construction member and arranged such that the hardened cement layer becomes the outer surface, on the hardened cement layer of the exterior construction member, on the foamed resin block A plurality of the intruding protrusions are provided integrally and at an appropriate interval.
Here, the shape of the protrusion is not limited in any way, and may be a ridge extending over the entire width or height of the hardened cement layer, or an intermittent ridge having a notch in the middle, or a cylinder, a prism, etc. It may be a protrusion. In addition, the protrusion may serve as a protrusion that performs an ant bond provided for joining the conventional cement-cured material layer and the foamed resin block. From the viewpoint of preventing the cement hardened material layer from falling off, it is important that a plurality of these protrusions are provided at an appropriate interval, that is, without unevenness in the cement hardened material layer.

  Moreover, in the civil engineering structure of claim 2, in the invention of claim 1, one or more of the protrusions are formed in an ant shape having a bulging portion at the tip, and the ant formed in the foamed resin block. It is characterized by being ant-coupled to the groove.

Moreover, in the exterior construction member for a civil engineering structure according to claim 3, in the exterior construction member for a civil engineering structure in which a cement cured material layer is formed on at least one surface of the foamed resin block, the cement cured material layer includes the A plurality of protrusions that enter the foamed resin block are provided integrally and at an appropriate interval.
Here, the shape of the protrusions formed on the hardened cement layer is not limited in shape, and may be a protrusion extending over the entire width or height of the hardened cement layer, or an intermittent protrusion having a notch in the middle. However, it may be a projection such as a cylinder or a prism. Moreover, although this protrusion part may serve as the protrusion part which performs the ant bond provided for joining with the conventional cement hardened material layer and a foamed resin block, it constructed | assembled using this exterior construction member In the civil engineering structure, a plurality of these protrusions should be provided at appropriate intervals from the viewpoint of effectively suppressing thermal melting of the foamed resin block due to external heat and preventing the cement cured material layer from falling off. Is important.

  Moreover, in the exterior construction member for a civil engineering structure according to claim 4, in the invention of claim 3, at least one of the protrusions is formed in an ant shape having a bulging portion at a tip, and the foamed resin block It is characterized by being connected to the formed dovetail.

  According to the civil engineering structure of the first aspect of the present invention, the hardened cement layer of the exterior construction member that constructs the wall surface is integrally provided with a plurality of protrusions that enter the foamed resin block, and a plurality of the protrusions appropriately. Since the thickness of the hardened cement layer in the portion where the protrusion is provided is thick and the heat shielding effect is high, the thermal melting of the foamed resin block around the protrusion is suppressed. Even when a fire or the like occurs near the wall surface of the civil engineering structure and the wall surface is exposed to direct fire or high temperature, the entire foamed resin block is not greatly melted by heat. The drop-off can be effectively prevented, and it is possible to prevent the heat resistance as the civil engineering structure from being lowered at a time.

  Moreover, according to the civil engineering structure according to the present invention of claim 2, one or more of the projecting portions that perform the above-described function are formed in an ant shape having a bulging portion at the tip, and are formed in the foamed resin block. Since the dovetail is connected to the dovetail groove, it is possible to realize a strong bond between the hardened cement layer and the foamed resin block in a normal state, and even when the foamed resin block is melted by external heat, The cement hardened material layer can be more effectively prevented from falling off by being hooked by the ant bond with the foamed resin block in the protrusion.

  Moreover, according to the exterior construction member for a civil engineering structure according to the third aspect of the present invention, the cement hardened material layer is integrally formed with a plurality of protrusions that enter the foamed resin block at an appropriate interval. In the civil engineering structure constructed by stacking the exterior construction members, even when the wall surface is exposed to direct fire or high temperature, the entire foamed resin block is largely melted by the heat shielding effect at the protrusions. This can effectively prevent the cemented material layer from falling off.

  According to the exterior construction member for a civil engineering structure according to the fourth aspect of the present invention, one or more of the projecting portions that perform the above-described function are formed in an ant shape having a bulging portion at the tip, and the foam Since the dovetail is formed in the dovetail formed in the resin block, it is possible to realize a strong bond between the cement cured product layer and the foamed resin block in a normal state, and the foamed resin block is melted by external heat. Even in the case, the cement hardened material layer can be more effectively prevented from falling off by being caught by the ant bond with the foamed resin block in the protruding portion.

Hereinafter, embodiments of the civil engineering structure and the civil engineering structure exterior construction member according to the present invention will be described in detail with reference to the drawings.
Here, FIG. 1 is a sectional view showing a widened embankment of a vertical wall on one side, which is an embodiment of a civil structure according to the present invention, and FIG. 2 is a civil structure according to the present invention that constitutes the outer surface thereof. FIG. 3 is a rear view of the foamed resin block portion of the exterior construction member for civil engineering structure shown in FIG. 2 indicated by an imaginary line (two-dot chain line). FIG. 4 to 7 are rear perspective views showing the foamed resin block portions with imaginary lines (two-dot chain lines) for other various embodiments of the civil engineering structure exterior construction member according to the present invention. It is. FIG. 8 is a partial perspective view showing a state where the exterior construction members shown in FIGS. 2 and 3 are stacked. FIG. 9 is a partial perspective view showing a state in which the exterior construction members according to modifications of the exterior construction member shown in FIGS. 2 and 3 are stacked. 10 is a partial perspective view showing a state in which exterior construction members according to still another modification of the exterior construction member shown in FIGS. 2 and 3 are stacked, and FIG. 11 is an exterior of the embodiment of FIG. In forming the construction member, a perspective view showing how the ridges are formed separately and bonded to the notch, FIG. 12 is a top view of the exterior construction member shown in FIG. 11, and FIG. FIG. 12 is a front view of the exterior construction member shown in FIG. 11.

  The one-side vertical wall widening embankment 1 shown in FIG. 1 is configured by stacking main construction members 2 to form an internal structure, and disposing the exterior construction member 3 on the outside, that is, on the site forming the outer surface. Has been.

  The main construction member 2 is constituted by a foamed resin block 4 formed in a rectangular parallelepiped shape. On the other hand, as shown in FIG. 2, the exterior construction member 3 is formed with a cement cured material layer 6 on one surface of the foamed resin block 5, and the periphery of the cement cured material layer 6 is disposed on the foamed resin block 6. It is formed so as to be located slightly inward from the periphery of 5 and has a notch portion 7 on the periphery.

In addition, a plurality of protrusions 8 that penetrate the foamed resin block 5 are formed integrally with the cement hardened material layer 6 at appropriate intervals.
For example, in the exterior construction member 3 shown in FIGS. 2 and 3, three ridges 8 a and 8 b divide the cement cured material layer 6 into three equal parts in the width direction over the entire height of the cement cured material layer 6. The middle protrusion 8a is formed in the shape of an ant with a bulging tip, and has a dovetail groove 9a formed in the foamed resin block 5. The other left and right ridges 8b are formed in a rectangular shape in cross section, and are fitted in the recessed grooves 9b formed in the foamed resin block 5, respectively.

  Further, in the exterior construction member 3 shown in FIG. 4, one ant-shaped ridge 8a extending in the longitudinal direction is formed in the vicinity of the middle of the cement cured material layer 6 over the entire height. Intermittent ridges 8c having a notch in the middle are formed in parallel with the ant-shaped ridges 8a with an interval of about one-third width of the cured product layer 6. In the exterior construction member 3 shown in FIG. 5, the four ridges 8b having a rectangular cross section are obtained by dividing the cement hardened material layer 6 into two equal parts in the height direction and two equal parts in the width direction. Each is formed in the lateral direction near the center.

  Further, in the exterior construction member 3 shown in FIG. 6, one ant-shaped protruding strip 8 a extending in the vertical direction is formed in the vicinity of the middle, covering the entire height of the cement cured material layer 6. A plurality of cylindrical projections 8d are formed at positions spaced about one-third of the width of the cement hardened material layer 6 and in the vicinity of each center when divided into two equal parts in the height direction. . Further, in the exterior construction member 3 shown in FIG. 7, each of the six prismatic projections 8e is obtained by dividing the cement hardened material layer 6 into two equal parts in the height direction and three equal parts in the width direction. It is formed near the center.

  And each protrusion part 8 (ant-shaped protruding item | line 8a, protruding item | line 8b of a cross-sectional rectangle, intermittent protruding item | line 8c, cylindrical shape formed in the cement hardened material layer 6 shown in above-mentioned FIGS. 4-7. Projections 8d and prismatic projections 8e) are fitted into inner peripheral recesses 9 (ant grooves 9a, recesses 9b, etc.) corresponding to the outer peripheral shape of the protrusions 8 formed on the foamed resin block 5, respectively. is doing.

The foamed resin block 4 of the main construction member 2 and the foamed resin block 5 of the exterior construction member 3 can be formed of the same resin, such as polystyrene, polyethylene, polypropylene, polyurethane, polyvinyl chloride, etc. Although it can be formed by foaming a resin, it is most preferable to foam a polystyrene resin that is inexpensive and has high strength even at low density. The foamed resin blocks 4 and 5 usually have a density of 0.01 to 0.05 g / cm ³ . Although it does not specifically limit as a magnitude | size, For example, 100-200 cm in length, 50-150 cm in width, and 30-100 cm in height are preferable from a viewpoint of workability etc. The foams of the foamed resin blocks 4 and 5 preferably have independent bubbles in consideration of water resistance, strength, and the like.

  The cement hardened material layer 6 provided on the surface of the exterior construction member 3 can be formed of various hydraulic cements such as concrete and mortar. Examples of hydraulic cements include ordinary Portland cement, medium-heated Portland cement, early-strength Portland cement, low sulfate Portland cement, white Portland cement, Portland cement, hydraulic lime, Roman cement, natural cement, alumina cement, etc. , Blast furnace cement, silica cement, expanded cement, and colored cement. Among these, portland cement, hydraulic lime, natural cement, blast furnace cement, expanded cement, and colored cement are preferably used.

In addition, various aggregates, reinforcing materials, weight reducing materials, water glass, and the like can be added to the cement. Aggregates include ordinary aggregates such as cinnabar and silica foam, and artificial lightweight aggregates such as expanded clay, pearlite, and expanded slag. Examples of the reinforcing material include various organic and inorganic fibers such as slag fiber, carbon fiber, nylon, and polyester fiber. Examples of the weight reducing material include foamed resin particles having a density of 0.008 to 0.1 g / cm ³ and a particle size of 2 to 15 mm, such as polyethylene, polyvinyl chloride, and polypropylene.

  In particular, when the foamed resin particles are mixed in the cement hardened material layer 6, it is lightweight and excellent in heat insulation properties. For example, when constructing a widening embankment 1, The foamed resin particles present on the surface of the hardened cement layer 6 are melted by the heated asphalt. As a result, the asphalt enters the hole of the melted particles, and the adhesion between the asphalt and the hardened cement layer 6 is excellent. It becomes a thing. The mixing ratio of the foamed resin particles is suitably 0.2 to 30 parts by weight with respect to 100 parts by weight of cement.

  As thickness (= t) of the general site | part of the said cement hardened material layer 6, 10-40 mm from a viewpoint of heat resistance, an intensity | strength, lightweight, etc., Furthermore, 15-25 mm is suitable. Further, the height of the protrusion 8 formed integrally with the cement hardened material layer 6 [the height (= H) of 8a in FIGS. 3, 4 and 6; 8b in FIG. 3; 8c in FIG. 8b in FIG. 5, 8d in FIG. 6 and 8e in FIG. 7 (= h)] are preferably 20 mm or more, more preferably 30 to 150 mm, from the viewpoint of heat insulation, lightness, and the like. 40 to 100 mm is more preferable.

Further, the width (= w), length (= l), diameter (= φ), length of one side (= a), etc. of each projection 8 formed on the cement hardened material layer 6 is determined as cement. The preferable numerical value varies greatly depending on the size of the hardened material layer 6 and the number of protrusions 8 to be formed, and cannot be defined unconditionally. However, the cement of all the protrusions 8 to be formed with respect to the plate surface area of the cement hardened material layer 6 The ratio of the projected area to the cured product layer 6 is suitably 5 to 25% in view of the balance between lightness and heat insulation (inhibition of melting of the foam block and prevention of falling off of the cured cement product layer when subjected to external heat). There, more preferably 7 to 20%, and with respect to the plate surface area of the cement hardened material layer 6, the area of the projection plane of one per protrusions 8 forming is preferably 50~1000cm ^2, 75~800cm ² Is more preferable.

  Furthermore, the number of the protrusions 8 formed on the cement hardened material layer 6 is plural from the viewpoint of effectively suppressing thermal melting of the foamed resin block due to external heat and preventing the cement hardened material layer 6 from falling off. That is, it is necessary to have two or more, and preferably three or more protrusions 8 are not biased to an appropriate interval, that is, the cement hardened material layer 6 as shown in FIGS. It is preferable that the protrusions 8 are arranged so as to be in charge of substantially the same area.

  Moreover, when the conventional exterior construction member was used, it became clear that the extent of the melting of the foamed resin block when receiving external heat was larger in the vicinity of the vertical joint portion of the exterior construction member than the others. Therefore, in order to minimize the melting of the foamed resin block in the vertical joint portion and more effectively prevent the cement hardened material layer from falling off, in the embodiment shown in FIG. The two ridges 8b, 8b are most preferably provided at both ends of the cement hardened material layer 6 or near the both ends. In this case, the three ridges 8a and 8b are provided over the entire height of the cement hardened material layer 6, and when the civil engineering structure is constructed by stacking the exterior construction member 3 halfway in the width direction, the ridges 8a are formed. Since the ridges 8b and 8b are located on the ridges and the ridges 8a are located on the ridges 8b and 8b, it is effective to melt the foamed resin block 5 in the vertical joint portion of the exterior construction member 3 when receiving external heat. Can be prevented. The most preferred embodiment is shown in FIGS. The protrusions 8b and 8b in the embodiment of FIG. 9 are arranged in cutout portions 9c and 9c formed by cutting out part of both side end portions of the foamed resin block 5 in the vertical direction. Further, the ridges 8b, 8b in the embodiment of FIG. 10 are arranged in the concave grooves 9b, 9b formed slightly inside the both end portions of the foamed resin block 5. Thus, the protrusion 8b provided in the both ends of the cement hardened material layer 6 or the place close to both ends is an ant shape provided in the vicinity of the center from the viewpoint of effectively suppressing the melting of the foamed resin block 5 in the vertical joint portion. It is preferable that the width (= w) is narrower and deeply penetrates into the foamed resin block 5, that is, a protrusion having a high height (= h) is formed as compared with the protrusion 8 a.

  In order to produce the exterior construction member 3 as described above, the foamed resin block 5 is formed by forming the foamed rectangular parallelepiped recesses 9 (such as the dovetail groove 9a and the recess 9b) or by forming the recesses 9 by molding. Is placed in a mold with the surface with the concave portion 9 facing upward, and uncured cement mortar is poured from above to form a desired shape, cured and cured, and enters the foamed resin block 5 If the cement hardened material layer 6 having the protrusions 8 (ant-shaped protrusions 8a, protrusions 8b having a rectangular cross section, intermittent protrusions 8c, columnar protrusions 8d, prismatic protrusions 8e, etc.) is formed. Good. On the other hand, the foamed resin block 5 is placed on a cement mortar put in a predetermined amount in a mold with the surface on which the concave portion 9 is formed facing downward, and is cured and cured. You may form the hardened | cured material cement layer 6 which has the protrusion part 8 which penetrate | invades into.

  Further, the ridges 8a, 8b, 8c, protrusions 8d, 8e, etc. can be formed of a material different from the cement hardened material layer 6 constituting the surface of the exterior construction member 3, but in that case, semi-incombustible A material or non-combustible material selected is used. Moreover, since the said protruding item | line 8a, 8b, 8c, protrusion 8d, 8e should just be integrated with the cement hardened material layer 6 finally, it forms separately from the cement hardened material layer 6, After adhering to or adhering to the recess 9 (such as the dovetail groove 9a, the recess 9b, or the notch 9c) of the foamed resin block 5, the cement hardened material layer 6 is bonded to the protrusion 8a, 8b, 8c as described above. , Protrusions 8d, 8e, etc. and the foamed resin block may be bonded and integrated. When forming the exterior construction member 3 of the aspect of FIG. 10, the above-mentioned protruding ridges 8b and 8b are formed separately, and a state in which they are bonded to the notches 9c and 9c is shown in FIG. Further, as shown in FIG. 11, the ridges 8b and 8b are separately formed, and a top view after bonding them to the notches 9c and 9c is shown in FIG. 12, and a front view is shown in FIG. 11 to 13, the ridges 8b and 8b are formed of a calcium silicate plate, and a foam resin made of the same material as the foam resin block 5 is bonded to the outside thereof. Moreover, as an adhesive agent, the adhesive agent which has an inorganic cement type as a main component is preferable.

  Moreover, in order to construct the wide embankment 1 of the one-side vertical wall shown in FIG. 1 using the main construction member 2 and the exterior construction member 3, the sand or gravel is spread after shaving or embankment, A foundation 10 is formed by tamping from above, and the main construction member 2 is stacked on the foundation 10, and the exterior construction member 3 is cemented on the surface at a portion forming the outer surface thereof. The hardened material layer 6 is laid out and stacked to form a structure, and a floor slab 11 is formed of concrete or the like on the upper surface of the structure, and a ground cover concrete 12 is formed on the upper shoulder side of the structure, Finishing work such as roadbed 13 and asphalt pavement 14 will be performed.

  And by the said notch part 7 of the exterior construction member 3, it fills the recessed part 15 formed in the joint part surface between the exterior construction members 3 and 3 with a backup material (not shown), and also on the surface side, A widening embankment 1 is constructed by filling a sealing material (not shown).

  As the backup material, a heat-resistant foam having heat resistance and heat insulation than the foamed resin block 5 can be used. For example, a vinyl chloride resin foam, a polyurethane resin foam, a phenol resin foam, etc. Furthermore, inorganic foams obtained by mixing and foaming an inorganic substance in the resin can be suitably used.

  Examples of the sealing material include silicone rubber, asphalt elastite, asphalt-impregnated nonwoven fabric, and elastic mortar. Among these, elastic mortar is preferable.

  As mentioned above, although the embodiment of the civil engineering structure and the exterior construction member for civil engineering structure according to the present invention has been described, the present invention is not limited to the embodiment described above, and is within the scope of the claims. Naturally, various modifications and changes can be made within the scope of the technical idea of the present invention described.

  For example, in the above embodiment, the civil structure of the present invention is applied to the wide embankment 1 of the vertical wall on one side, but other than that, a railway platform, a lifting slope of a pedestrian bridge, a widening of a roadway connecting sidewalk, a bridge The civil engineering structure and the civil engineering structure exterior construction member according to the present invention can be applied to various civil engineering structures such as approach roads to the sidewalk.

  Moreover, in the said embodiment, although demonstrated about what arrange | positioned the cement hardened | cured material layer 6 only to one surface (front surface) of the foamed resin block 5 as the exterior construction member 3, as needed, for example, a platform In the case of the exterior construction member disposed at the corner, a cement hardened material layer is disposed on the front and side surfaces of the foamed resin block.

  Furthermore, the embodiment of the exterior construction member 3 shown in FIGS. 3 to 13, in particular, the shape and arrangement of the protrusions 8 are merely various examples, and the present invention is not limited to the shape and arrangement of the protrusions 8 shown in the drawings. It is not limited to.

Example 1
On one side surface (1 m × 0.5 m) of an expanded polystyrene block (JSP Co., Ltd .: Styrodia civil engineering block D20, dimensions: 2 m × 1 m × 0.5 m), a dovetail groove is formed at the center in the width direction of the surface, and Two concave grooves spaced apart from the dovetail groove (ant groove: opening width 80 mm, depth 40 mm, bottom width 150 mm, concave groove: width 75 mm, depth 75 mm, dovetail groove and right and left concave grooves Core-to-core spacing 300 mm), put the dovetail groove and the two concave grooves into a mold with the surface on which the groove is formed facing upward, and pour uncured cement mortar from above, -The exterior construction member 3 shown in FIG. 2 and FIG. 3 in which the cured cement layer 6 having a plate thickness of 20 mm having three protrusions 8 that penetrate into the expanded polystyrene block 5 was formed by curing.

  As shown in FIG. 8, the produced exterior construction member 3 is stacked so that the cement hardened material layer 6 constructs a wall surface, and thick in a recess 15 (depth 20 mm, width 10 mm) formed in the joint portion. A civil engineering structure having the structure of the present invention is filled with a back-up material (manufactured by JSP Co., Ltd .: Miraffenen) having a length of 10 mm and a width of 10 mm, and further filled with a sealing material (architectural silicone sealant) It was constructed.

-Example 2-
In Example 1 above, the position and shape of the two concave grooves of the expanded polystyrene block were changed to process the two notches (the dovetail groove was processed to the same shape and the same position as in Example 1). In the cut-out portion, a ridge made of a calcium silicate plate prepared in advance is adhered, and thereafter, in the same manner as in Example 1, cement mortar is poured, cured and cured, and enters the expanded polystyrene block 5 3 The exterior construction member 3 having the protrusions 8 and the hardened cement layer 6 having a thickness of 20 mm was prepared, and the recess 15 (depth 20 mm, width) formed in the joint portion as in Example 1. 10mm) is filled with a backup material of 10mm thickness and width of 10mm (manufactured by JSP Co., Ltd .: Miraffenen), and further filled with a sealing material (silicone sealing material for construction) on the outside, as shown in FIG. Way to build a civil engineering structure structure with the present invention stacked exterior building member.
The two notches had an opening width of 80 mm, a depth of 75 mm, a bottom width of 115 mm, and a center-to-core distance between the dovetail groove and the left and right notch portions of 460 mm.

-Example 3-
In Example 1 above, the position and shape of the two concave grooves of the expanded polystyrene block were changed to process the two notches (the dovetail groove was processed to the same shape and the same position as in Example 1). In the notch, a preliminarily prepared calcium silicate plate (horizontal thickness 80 mm) and a foamed polystyrene plate (horizontal thickness 10 mm) are cemented resin mortar (cement: acryl emulsion: water = 1: 0.5: The ridges composed of those bonded at 0.2) were bonded with the calcium silicate plate side facing the notch as shown in FIG. 11, and thereafter, as in Example 1, cement was used. A mortar is poured, cured and cured to produce an exterior construction member 3 having a three-thick cemented material layer 6 having a thickness of 20 mm and having three protrusions 8 that enter the expanded polystyrene block 5. In the same manner as in Example 1, the recess 15 (depth 20 mm, width 10 mm) formed in the joint portion is filled with a backup material of 10 mm thickness and 10 mm width (manufactured by JSP Co., Ltd .: Miraffenen) and further sealed outside A civil engineering structure having the structure of the present invention was constructed by filling a material (silicone sealing material for construction) and stacking exterior construction members as shown in FIG.
The two notches had an opening width of 90 mm, a depth of 80 mm, a bottom width of 90 mm, and a gap between the dovetail groove and the left and right notch portions of 455 mm.

-Comparative Example 1-
In the above-mentioned Example 1, only a dovetail groove is processed into the expanded polystyrene block (the dovetail groove having the same shape as that of the above-mentioned Example 1 is located at the same position), and a hardened cement having only one protrusion at the center by the same manufacturing method. A civil engineering structure was constructed in the same manner as in Example 1 except that an exterior construction member having a layer was prepared and the exterior construction member was used.

As shown in FIG. 8, a bonfire was performed for 30 minutes in the state where the wall M stood on the wall as shown in FIG.
After the bonfire extinguishes, after the wall surface temperature reaches about 30 ° C., each structure is disassembled and the molten state of the most melted portion of the expanded polystyrene block 5 on the back side of the cement hardened material layer 6 is observed. did.

As a result, in Example 1, as shown in FIG. 14, the presence of the three projections 8 formed at appropriate intervals suppresses the thermal melting of the expanded polystyrene block 5, and the melting area is small. In addition, the hardened cement block 6 is stably supported by the foamed polystyrene block 5a of the protruding portion 8 remaining without being melted, and the falling off of the hardened cement layer 6 was not a concern.
Further, in the examples 2 and 3, as shown in FIGS. 15 and 16, the protrusions (projections 8b) 8 are positioned at both ends or substantially both ends to form the vertical joints, The thermal melting of the expanded polystyrene block 5 in the vertical joint is further suppressed than in the first embodiment, and the cemented cured material layer 6 is stably formed by the expanded polystyrene block 5a of the protruding portion 8 remaining without being melted. In any case, the cement hardened material layer 6 was not worried about falling off.
On the other hand, in the comparative example 1, as shown in FIG. 17, the expanded polystyrene block 5 is largely heat-melted, and the expanded polystyrene block 5a of the protruding portion 8 remaining without being melted is also thin, and one place Therefore, the risk of falling off of the hardened cement material layer 6 was great.

It is sectional drawing which showed the wide embankment of the one-sided vertical wall which is one Embodiment of the civil engineering structure which concerns on this invention. In the structure shown in FIG. 1, it is the surface view perspective view which showed one Embodiment of the exterior construction member for civil engineering structures based on this invention which comprises the outer surface. It is the back view perspective view which showed the foamed resin block part of the exterior construction member for civil engineering structures shown in FIG. 2 with the imaginary line (two-dot chain line). It is the back view perspective view which showed the foamed resin block part with the imaginary line (two-dot chain line) about other embodiment of the exterior construction member for civil engineering structures concerning the present invention. It is the back view perspective view which showed the foamed resin block part by the imaginary line (two-dot chain line) about other embodiment of the exterior construction member for civil engineering structures concerning the present invention. It is the back view perspective view which showed the foamed resin block part by the imaginary line (two-dot chain line) about other embodiment of the exterior construction member for civil engineering structures concerning the present invention. It is the back view perspective view which showed the foamed resin block part by the imaginary line (two-dot chain line) about other embodiment of the exterior construction member for civil engineering structures concerning the present invention. It is the fragmentary perspective view (partial perspective view of the civil engineering structure of Example 1) which showed the state which piled up the exterior construction member shown in FIG. 2 and FIG. It is the fragmentary perspective view (partial perspective view of the civil engineering structure of Example 1) which showed the state where the exterior construction member concerning the modification of the exterior construction member shown in Drawing 2 and Drawing 3 was piled up. The partial perspective view (partial perspective view of the civil engineering structure of Example 1) which showed the state which piled up the exterior construction member concerning other modifications of the exterior construction member shown in Drawing 2 and Drawing 3 is there. When forming the exterior construction member of the aspect of FIG. 10, it is the perspective view which showed a mode that a protruding item | line was formed separately and they were adhere | attached on a notch part. It is a top view of the exterior construction member shown in FIG. It is a front view of the exterior construction member shown in FIG. It is sectional drawing which showed the melted state of the foamed resin block of the part in alignment with the AA in FIG. 8 about the civil engineering structure of Example 1. FIG. It is sectional drawing which showed the melted state of the foamed resin block of the part in alignment with the BB line in FIG. 9 about the civil engineering structure of Example 2. FIG. About the civil engineering structure of Comparative Example 1 It is sectional drawing which showed the melted state of the foamed resin block of the part in alignment with CC line in FIG. 10 about the civil engineering structure of Example 3. FIG. It is sectional drawing which showed the molten state of the foamed resin block corresponding to the part which follows the AA line in FIG. 8 about the civil engineering structure of the comparative example 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Widening embankment 2 Main construction member 3 Exterior construction member 4,5 Foamed resin block 6 Cement hardened material layer 7 Notch 8,8a, 8b, 8c, 8d, 8e Protrusion 9,9a, 9b Recess 9c Notch 10 Foundation 11 Floor slab 12 Overlay concrete 13 Roadbed 14 Asphalt pavement 15 Recess

Claims (4)

  A main construction member made of a foamed resin block is stacked, and an exterior construction member formed by forming a cement hardened material layer on at least one surface of the foamed resin block is disposed outside the stacked main building member and a cement hardened material layer. In the civil structure that is arranged and constructed so as to be an outer surface, the cemented material layer of the exterior construction member is integrally provided with a plurality of protrusions that enter the foamed resin block, and a plurality of protrusions are appropriately spaced. A civil engineering structure characterized by being provided in   The one or more of the protrusions are formed in an ant shape having a bulging portion at a tip, and are ant-coupled to an ant groove formed in the foamed resin block. Civil engineering structure.   In the exterior construction member for a civil engineering structure formed by forming a cement hardened material layer on at least one surface of the foamed resin block, a protrusion that enters the foamed resin block is integrally formed on the cement hardened material layer, and An exterior construction member for a civil engineering structure, wherein a plurality of them are provided at an appropriate interval. The one or more of the protrusions are formed in an ant shape having a bulging portion at a tip, and are ant-coupled to an ant groove formed in the foamed resin block. Exterior construction member for civil engineering structures.

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