JP6504648B2 - Water blocking structure - Google Patents
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- JP6504648B2 JP6504648B2 JP2014223122A JP2014223122A JP6504648B2 JP 6504648 B2 JP6504648 B2 JP 6504648B2 JP 2014223122 A JP2014223122 A JP 2014223122A JP 2014223122 A JP2014223122 A JP 2014223122A JP 6504648 B2 JP6504648 B2 JP 6504648B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
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Description
本発明は、産業廃棄物や一般廃棄物等を最終処分するための廃棄物処分場を構築する廃棄物埋立護岸に採用される遮水構造に関するもので、特に、廃棄物埋立護岸である直立堤護岸と傾斜堤護岸とが直交する箇所等の直立堤護岸の側面と傾斜堤護岸の端面との合わせ面における遮水構造に関するものである。 The present invention relates to a water shielding structure employed in a waste landfill for constructing a waste disposal site for final disposal of industrial waste, general waste and the like, and in particular, an upright levee which is a waste landfill for reclamation. The present invention relates to a water blocking structure at the mating surface of the side face of an upright revetment and the end face of the inclined revetment, such as a place where a revetment and an inclined revetment are orthogonal to each other.
近年、産業廃棄物の排出量は益々増大する傾向にあり、これに伴い最終処分場の建設も、海面、陸上を問わず数多く推し進められている。この種の管理型最終処分場においては、当然ではあるが、廃棄物内に含まれる有害物質の処分域外への漏出をいかに抑えるかが重要な課題となっている。 In recent years, the amount of industrial waste emissions tends to increase, and in connection with this, construction of final disposal sites is being promoted at a large number regardless of sea surface or land. In this type of controlled final disposal site, as a matter of course, it has become an important issue how to control the leakage of harmful substances contained in waste out of the disposal area.
例えば、海面処分場には、直立堤護岸及び傾斜堤護岸によって埋立処分域の四方を囲むように構築されているものがある。直立堤護岸2は、それ自体遮水性を有しており、図1に示すように、断面矩形状のコンクリート製のケーソンにより構成されるものや、図6に示すように、鋼板セルにより構成されるものがある。また鋼管矢板または鋼矢板等により構成されるものがある。一方、傾斜堤護岸3は、海底地盤に造成した捨石マウンド5上に据付けられた断面矩形状のケーソン6と、ケーソン6の埋立処分域側に多数の石材10、11を投入して造成された裏込層7と、裏込層7内に敷設された遮水シート8とを備えて構成される。傾斜堤護岸3は、遮水シート8により遮水性を有している。裏込層7の埋立処分域側は法面に形成される。すなわち、裏込層7の埋立処分域側の法面は、砕石等の多数の石材10、11を所定の傾斜角度で斜面状に盛り立てることにより形成される。 For example, some sea surface disposal sites are constructed so as to surround four sides of the landfill disposal area by upright revetments and sloped revetments. The upright levee revetment 2 itself has a water blocking property, and as shown in FIG. 1, it is composed of a concrete caisson having a rectangular cross section, and as shown in FIG. There is something. There are also steel pipe sheet piles, steel sheet piles and the like. On the other hand, the sloped revetment 3 was constructed by injecting a large number of stone materials 10 and 11 on the side of the landfill disposal area of the caisson 6 with a rectangular caustic section installed on the rubble mound 5 built on the seabed ground. It comprises a back-in layer 7 and a water-impervious sheet 8 laid in the back-in layer 7. The sloped revetment 3 has an impermeability by the impermeable sheet 8. The landfill area side of the back-in layer 7 is formed on the slope. That is, the slope surface of the backfill layer 7 on the side of the landfill site is formed by elevating a large number of stone materials 10 and 11 such as crushed stone in a slope shape at a predetermined inclination angle.
そして、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとの合わせ面には、該合わせ面から外水域に漏水しないように遮水構造50が採用されている。
従来の遮水構造50は図17に示すように構成される。すなわち、図17に示すように、直立堤護岸2の側面2aの、傾斜堤護岸3の端面3aとの合わせ面にはポリエチレン製のアンカシート51が埋設されている。該アンカシート51は、傾斜堤護岸3の傾斜に沿って部分的に埋設されている。該アンカシート51を覆うようにポリエチレン製の遮水シート52が取り付けられる。具体的には、遮水シート52とアンカシート51とが所定部位にて押し出し溶着にて接合されている。この接合作業は陸上で実施されている。
And, on the mating surface of the side face 2a of the upright revetment 2 and the end face 3a of the inclined revetment 3, a water blocking structure 50 is employed so as to prevent water leakage from the mating surface to the outer water area.
The conventional water blocking structure 50 is configured as shown in FIG. That is, as shown in FIG. 17, an anchor sheet 51 made of polyethylene is embedded in the side surface 2 a of the upright revetment 2 and the end face 3 a of the inclined revetment 3. The anchor sheet 51 is partially embedded along the slope of the sloped revetment 3. A polyethylene water blocking sheet 52 is attached to cover the anchor sheet 51. Specifically, the water blocking sheet 52 and the anchor sheet 51 are joined by extrusion welding at a predetermined portion. This joining operation is carried out on land.
そして、まず、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとを当接させる。この時、傾斜堤護岸3は、その裏込層7内の遮水シート8が外部に露出した状態となっている。続いて、直立堤護岸2の側面2aに設けたアンカシート51に接続された遮水シート52の上部を傾斜堤護岸3の法面に沿って折り曲げて、折り曲げた直立堤護岸2側の遮水シート52の上に傾斜堤護岸3側の遮水シート8を重ね合せるようにする。 Then, first, the side surface 2 a of the upright revetment 2 and the end face 3 a of the inclined revetment 3 are brought into contact with each other. At this time, in the sloped revetment 3, the water blocking sheet 8 in the back-in layer 7 is exposed to the outside. Subsequently, the upper portion of the water-impervious sheet 52 connected to the anchor sheet 51 provided on the side surface 2a of the upright revetment 2 is bent along the slope of the inclined revetment 3 and the water is blocked on the upright revetment 2 side. The water blocking sheet 8 on the side of the sloped revetment 3 is stacked on the sheet 52.
続いて、傾斜堤護岸3の端面3aから所定距離間隔を設けた位置に型枠コンクリートブロック12を法面に沿って配置する。続いて、直立堤護岸2の側面2aと傾斜堤護岸3の型枠コンクリートブロック12との間における、直立堤護岸2側の遮水シート52及び傾斜堤護岸3側の遮水シート8の上面に、断面略楕円形状の止水領域用石材18を多数段に亘って積層した後にアスファルトマスチック14を充填して止水領域15を形成する。該止水領域15のアスファルトマスチック14を押し込むためにその上面に被覆用アスファルトマット27を配置する。その後、最終的に、傾斜堤護岸3として、被覆用アスファルトマット27、型枠コンクリートブロック12及び遮水シート8の上方に多数の石材10を所定の傾斜角度で斜面状に盛り立てて裏込層7を形成する。 Subsequently, the formwork concrete block 12 is disposed along the slope at a position where a predetermined distance from the end face 3a of the sloped revetment 3 is provided. Subsequently, between the side 2 a of the upright revetment 2 and the formwork concrete block 12 of the inclined revetment 3, on the upper surface of the impermeable sheet 52 on the upright revetment 2 side and the impermeable sheet 8 on the inclined revetment 3 side. After the water blocking area stone material 18 having a substantially elliptical cross section is stacked in multiple stages, the asphalt mastic 14 is filled to form the water blocking area 15. In order to press in the asphalt mastic 14 of the water blocking area 15, a covering asphalt mat 27 is disposed on the upper surface thereof. Thereafter, as the sloped revetment 3, finally, a large number of stone materials 10 are piled up on the slope shape at a predetermined inclination angle above the covering asphalt mat 27, the formwork concrete block 12 and the water blocking sheet 8 to form a backing layer. Form 7
これにより、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとの合わせ面は、直立堤護岸2の側面2aに埋設されたアンカシート51と遮水シート52との押し出し溶着による接合部53、該接合部53から延びる直立堤護岸2側の遮水シート52、傾斜堤護岸3側の遮水シート8及びアスファルトマスチック14による止水領域15が液密連続体として構成されて、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとの合わせ面は前記液密連続体により遮水され、遮水性が向上されている。なお、実際には、アスファルトマスチック14による止水領域15が、直立堤護岸2の側面2aに密着している密着部位にて、遮水されるようになる。 Thereby, the joint surface of the anchor sheet 51 and the water blocking sheet 52 embedded in the side surface 2 a of the upright levee revetment 2 by extrusion welding is a joint portion between the side surface 2 a of the upright levee revetment 2 and the end face 3 a of the inclined levee revetment 3. 53, the water blocking sheet 52 on the side of the upright revetment 2 extending from the joint 53, the water blocking sheet 8 on the side of the inclined revetment 3 and the water blocking area 15 by the asphalt mastic 14 are configured as liquid tight continuous bodies; The mating surface of the side face 2a of the revetment 2 and the end face 3a of the sloped revetment 3 is sealed by the liquid tight continuum, and the water impermeability is improved. In addition, in fact, the water blocking area 15 by the asphalt mastic 14 comes to be water-insulated at the close contact portion in close contact with the side surface 2 a of the upright revetment 2.
しかしながら、上述した従来の遮水構造50では、図18に示すように、地震等の有事の際、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとが離れた場合、アスファルトマスチック14の自己変形によりその隙間35(図4も参照)が埋まる前に、傾斜堤護岸3の多数の上部石材10がその隙間35に流れ込み、前記液密連続体による合わせ面の遮水性が確保できなくなる虞がある。 However, in the conventional water-impervious structure 50 described above, as shown in FIG. 18, when the side surface 2 a of the upright revetment 2 and the end face 3 a of the inclined revetment 3 are separated in the event of an earthquake or the like, asphalt mastic 14 Before the gap 35 (see also FIG. 4) is filled by the self-deformation of the large number of upper stone materials 10 of the sloped revetment 3 flow into the gap 35, and the water tightness of the mating surface by the liquid tight continuum can not be secured. There is a risk.
また、上述した従来の遮水構造50では、直立堤護岸2の側面2aと傾斜堤護岸3の型枠コンクリートブロック12との間の遮水シート8、52上に、アスファルトマスチック14を充填して止水領域15を形成しているが、この止水領域15は、アスファルトマスチック14を均等に充填させるために、偏平率等が考慮された断面略楕円形状の止水領域用石材18を多数段に亘って積層した後に、各止水領域用石材18、18間にアスファルトマスチック14を充填するようにしている。しかしながら、この従来の遮水構造50では、止水領域15の、断面において最も下方に位置する各止水領域用石材18の一部が、アスファルトマスチック14の打設前に遮水シート8、52と直接接しているため、アスファルトマスチック14の打設後にアスファルトマスチック14が遮水シート8、52の全面を覆うことができないことに起因する遮水性の低下が懸念される。そのため、各止水領域用石材18の積層と、アスファルトマスチック14の充填とを1層ずつ交互に行って施工するため、その作業に多くの時間を費やしていることが課題となっている。 Further, in the above-described conventional water-impervious structure 50, the asphalt mastic 14 is filled on the water-impervious sheets 8, 52 between the side surface 2a of the upright revetment 2 and the formwork concrete block 12 of the inclined revetment 3 Although the water blocking area 15 is formed, the water blocking area 15 has a large number of steps of stone materials 18 for water blocking area having a substantially elliptical cross section in which the aspect ratio and the like are considered in order to uniformly fill the asphalt mastic 14. After the lamination, the asphalt mastic 14 is filled between the water blocking area stones 18 and 18. However, in this conventional water blocking structure 50, a part of each of the water blocking area stones 18 located at the lowermost position in the cross section of the water blocking area 15 is the water blocking sheet 8, 52 before the asphalt mastic 14 is cast. Since the asphalt mastic 14 can not cover the entire surface of the water-impervious sheets 8 and 52 after the asphalt mastic 14 has been cast, there is a concern that the water impermeability may be reduced. Therefore, it is an issue to spend a lot of time in the work because the layering of the stone material 18 for water blocking area and the filling of the asphalt mastic 14 are alternately performed for each layer.
さらに、従来の遮水構造50おいては、陸上にて、直立堤護岸2(ケーソン)の側面2aに埋設されたアンカシート51と遮水シート52とを所定部位にて押し出し溶着53により接合する作業が必要であるが、この作業は、遮水シート52をケーソンの上端から吊り下げて、遮水シート52とアンカシート51とを位置合わせして、所定部位を押し出し溶着53するために高所作業となり、高所での両者の位置調整等非常に手間であり作業性が非常に悪い。しかも、直立堤護岸2が鋼矢板や鋼管矢板で構成される場合には、ポリエチレン製の遮水シート52を予め鋼矢板や鋼管矢板の側面に溶着することができず、そもそも、この遮水構造50を採用することができない。 Furthermore, in the conventional water-impervious structure 50, the anchor sheet 51 and the water-impervious sheet 52 embedded in the side surface 2a of the upright revetment 2 (caisson) are bonded on the land by extrusion welding 53 Although the work is necessary, this work suspends the water-impervious sheet 52 from the upper end of the caisson, aligns the water-impervious sheet 52 and the anchor sheet 51, and heights the portion to be extruded 53 by welding. It becomes work, and it is very laborious, such as position adjustment of both in the high place, and workability is very bad. Moreover, when the upright levee revetment 2 is formed of steel sheet piles or steel pipe sheet piles, the polyethylene water-impervious sheet 52 can not be welded in advance to the side surface of the steel sheet piles or steel pipe sheet piles 50 can not be adopted.
そこで、遮水構造の従来技術として特許文献1には、廃棄物が堆積されるピットを備え、前記ピットの底版および/または側壁に目地部が形成された廃棄物処分場における遮水構造であって、前記ピットの表面に遮水シートが敷設され、前記遮水シートの表面に補強シートが固定され、前記補強シートは、展開可能となる状態で前記目地部を跨いでおり、前記補強シートを展開可能状態に保持する展開状態保持構造を備えることが開示されている。 Therefore, Patent Document 1 discloses a water blocking structure in a waste disposal site having a pit on which waste is deposited, and a joint portion formed on a bottom plate and / or a side wall of the pit as a prior art of the water blocking structure. A water-impervious sheet is laid on the surface of the pits, a reinforcing sheet is fixed on the surface of the water-impregnated sheet, and the reinforcing sheet straddles the joint in a state where it can be deployed, and the reinforcing sheet It is disclosed to provide a deployed state retention structure that retains in a deployable state.
しかしながら、特許文献1の発明に係る廃棄物処分場の遮水構造は、展開可能となる状態で補強シートが、目地部を遮水シートと共に跨るように配置されている構成であり、この遮水構造では、上述した問題を解決するどころか、直立堤護岸の側面と傾斜堤護岸の端面との合わせ面に採用することはできない。 However, the water shielding structure of the waste disposal site according to the invention of Patent Document 1 has a configuration in which the reinforcing sheet is disposed so as to straddle the joint portion together with the water shielding sheet in a state where expansion is possible. In the structure, it can not be adopted as the mating surface of the side of the upright revetment and the end face of the inclined revetment, rather than solving the above-mentioned problems.
本発明は、かかる点に鑑みてなされたものであり、直立堤護岸の側面と傾斜堤護岸の端面との合わせ面における遮水性を確保でき、作業性に優れた遮水構造を提供することを目的とする。 The present invention has been made in view of such a point, and it is possible to ensure water blocking on the mating surface between the side face of the upright revetment and the end face of the inclined revetment, and to provide a water impermeable structure excellent in workability. To aim.
本発明は、上記課題を解決するための手段として、請求項1に記載した発明は、直立堤護岸の側面と傾斜堤護岸の端面との合わせ面における遮水構造であって、前記傾斜堤護岸は、その内部に前記直立堤護岸の側面と密着するようにして充填され、外力により任意形状へ自己変形すると共に加熱により固液変化が進行する止水材と、該止水材の上方及び下方に配置される多数の石材と、前記直立堤護岸の側面に接続され、前記止水材と前記上方の各石材との間に向かって延び、前記上方の各石材の、前記止水材側への移動を規制するシート状の上部規制部材と、を備えることを特徴とするものである。
請求項1の発明では、地震等の有事の際、直立堤護岸の側面と傾斜堤護岸の端面との間に隙間が生じた場合でも、シート状の上部規制部材により、止水材の上方に配置される多数の石材がその隙間に入り込むことを抑制することができる。そして、時間の経過とともに、上載圧により止水材が自己変形してその隙間を埋めることにより、遮水性を回復させることができる。
The present invention is a means for solving the above problems, and the invention described in claim 1 is a water blocking structure in the joint surface of the side face of the upright revetment and the end face of the inclined revetment, the inclined revetment The water barrier material is filled in such a manner as to be in intimate contact with the side surface of the upright revetment and self-deforms into an arbitrary shape by external force and changes in solid and liquid progress by heating, and above and below the water barrier material Connected to the sides of the upright revetment, extending between the water blocking material and the stones above, to the water blocking material side of the stones above And a sheet-like upper regulating member that regulates the movement of the sheet .
According to the first aspect of the present invention, even when a gap is generated between the side face of the upright revetment and the end face of the inclined revetment in the event of an earthquake or the like , the sheet-like upper regulation member is located above the water blocking material. It can suppress that a large number of placed stones enter into the gap. Then, with the passage of time, the water blocking material is self-deformed due to the applied pressure to fill the gap, whereby the water blocking can be restored.
請求項2に記載した発明は、請求項1に記載した発明において、前記直立堤護岸の側面に接続され、前記止水材と前記下方の各石材との間に向かって延び、前記止水材の、前記下方の各石材側への移動を規制するシート状の下部規制部材を備えることを特徴とするものである。
請求項2の発明では、地震等の有事の際、直立堤護岸の側面と傾斜堤護岸の端面との間に隙間が生じた場合でも、シート状の下部規制部材により、止水材が自己変形して、その下方に位置する石材側に浸出せずに、時間の経過とともに、止水材が隙間を埋めて留まることにより、遮水性を回復させることができる。
The invention as set forth in claim 2, in the invention described in claim 1, is connected to the side surface of the upright bank revetment extending toward between each stone of the lower and the water stopping material, the water stopping material The sheet-like lower regulation member which regulates movement to the above-mentioned each stone material side of the above is provided.
According to the invention of claim 2, even when a gap is generated between the side face of the upright revetment and the end face of the inclined revetment in the event of an earthquake or the like , the water blocking material is self-deformed by the sheet-like lower regulation member. Then, without leaching to the stone side located below the water barrier, the water blocking material can fill the gap and stay with the passage of time, whereby the water barrier can be restored.
請求項3に記載した発明は、請求項2に記載した発明において、前記上部規制部材及び前記下部規制部材のそれぞれは、前記直立堤護岸の側面と前記傾斜堤護岸の端面とが離間する方向に沿って伸縮自在に構成されることを特徴とするものである。
請求項3の発明では、地震等の有事の際、直立堤護岸の側面と傾斜堤護岸の端面との間に隙間が生じた場合、上部規制部材の伸長により、上方に配置される多数の石材の、その隙間への侵入を確実に抑制することができる。また、下部規制部材の伸長により、止水材の、その下方に位置する石材側への浸出を確実に抑制することができる。
According to a third aspect of the present invention, in the second aspect, each of the upper regulation member and the lower regulation member is in a direction in which the side surface of the upright revetment and the end surface of the inclined revetment are separated. It is characterized in that it is configured to be stretchable along it.
According to the invention of claim 3, when a gap is generated between the side face of the upright revetment and the end face of the inclined revetment in the event of an earthquake or the like, a large number of stones arranged above due to the extension of the upper regulating member Can be reliably suppressed. In addition, by the extension of the lower regulating member, it is possible to reliably suppress the leaching of the water blocking material to the stone side located below it.
請求項4に記載した発明は、請求項1〜3のいずれかに記載した発明において、前記止水材内に伝熱部材を配置して、該伝熱部材の一部を外部に露出させることを特徴とするものである。
請求項5に記載した発明は、請求項4に記載した発明において、前記伝熱部材は、前記止水材の直立堤護岸側の部位に配置されることを特徴とするものである。
請求項4及び5の発明では、伝熱部材を加熱することにより、止水材を加熱して固液変化を促して、直立堤護岸の側面と傾斜堤護岸の端面との間の隙間を埋める方向への止水材の自己変形を促進させることができる。
In the invention described in claim 4, in the invention described in any one of claims 1 to 3, a heat transfer member is disposed in the water blocking material, and a part of the heat transfer member is exposed to the outside. It is characterized by
The invention described in claim 5 is characterized in that, in the invention described in claim 4, the heat transfer member is disposed at a portion on the upright water revetment side of the water blocking material.
In the inventions of claims 4 and 5, by heating the heat transfer member, the water blocking material is heated to promote solid-liquid change, thereby filling the gap between the side surface of the upright revetment and the end face of the inclined revetment. The self-deformation of the water blocking material in the direction can be promoted.
本発明に係る遮水構造によれば、有事の際に直立堤護岸の側面と傾斜堤護岸の端面との間に隙間が生じた場合でも、その合わせ面における遮水性を確保する(回復させる)ことができる。また、特に、上部規制部材は、直立堤護岸の側面に傾斜堤護岸の端面を当接させた後、止水材の施工後に該止水材の上方に直立堤護岸の側面から傾斜堤護岸側に向かう方向に沿って取り付けられるので、従来のように高所作業もなくその作業性を従来よりも向上させることができる。 According to the water blocking structure according to the present invention, even when a gap is generated between the side face of the upright revetment and the end face of the inclined revetment in case of emergency, the water blocking on the mating surface is secured (restored). be able to. Also, in particular, the upper regulating member makes the end face of the inclined revetment abut the side face of the upright revetment, and after the construction of the water blocking material, inclines from the side of the upright revetment to the upper side of the upright revetment Since it is attached along the direction toward the front, it is possible to improve its workability more than before without the need for height work as in the prior art.
以下、本発明を実施するための形態を図1〜図16に基づいて詳細に説明する。従来例と同一部材及び相当する部材は、同一符号を使用して説明する。
産業廃棄物や一般廃棄物等を最終処分するための廃棄物処分場として海面処分場が採用される。該海面処分場は、直立堤護岸2及び傾斜堤護岸3によって埋立処分域の四方を囲むように構築されている。図1に示すように、直立堤護岸2は、コンクリート製の断面矩形状のケーソンや、図6に示すように鋼板セルや、鋼管矢板または鋼矢板等により構築され、遮水性を有している。一方、傾斜堤護岸3は、海底地盤に造成した捨石マウンド5上に据付けられた断面矩形状のケーソン6と、該ケーソン6の埋立処分域側に上部石材10及び下部石材11を投入して造成され、埋立処分域側が法面10bに形成される裏込層7と、該裏込層7内の上部石材10と下部石材11との間に埋設された合成樹脂製の遮水シート8とを備えて構成され、遮水性を有している。遮水シート8は、熱可塑性の低密度ポリエチレン樹脂(LDPE)製であり、可撓性を有している。なお、遮水シート8は、熱可塑性の高密度ポリエチレン(HDPE)、または塩化ビニールなどの合成樹脂製であってもよい。
Hereinafter, modes for carrying out the present invention will be described in detail based on FIGS. 1 to 16. The same members as the conventional example and the corresponding members will be described using the same reference numerals.
The sea surface disposal site is adopted as a waste disposal site for final disposal of industrial waste and general waste. The sea surface disposal site is constructed by the upright revetment 2 and the sloped revetment 3 so as to surround four sides of the landfill area. As shown in FIG. 1, the upright levee revetment 2 is constructed of a concrete caisson having a rectangular cross section, a steel plate cell, a steel pipe sheet pile or a steel sheet pile as shown in FIG. . On the other hand, the sloped revetment 3 is constructed by throwing the upper stone 10 and the lower stone 11 on the side of the landfill disposal area of the caisson 6 with the rectangular caustic section installed on the rubble mound 5 built on the seabed And the landfill disposal side is formed on the slope 10b, and a synthetic resin water blocking sheet 8 embedded between the upper stone 10 and the lower stone 11 in the backlay layer 7 It is configured to have water blocking. The water blocking sheet 8 is made of thermoplastic low density polyethylene resin (LDPE) and has flexibility. The water blocking sheet 8 may be made of thermoplastic high density polyethylene (HDPE) or synthetic resin such as vinyl chloride.
まず、断面矩形状のケーソンにより構成され、その側面2aが平面である直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとの合わせ面に採用される、本発明の第1の実施形態に係る遮水構造1を説明する。第1の実施形態に係る遮水構造1は、例えば、直立堤護岸2と傾斜堤護岸3とが直交する箇所等、直立堤護岸の側面2aに、傾斜堤護岸3の法面(上部石材10の法面10a)と直交する端面3aが突き当たる箇所における直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとの合わせ面に採用される。 First, the first embodiment of the present invention, which is formed of a caisson having a rectangular cross section, and the side surface 2a is adopted as a mating surface of the side surface 2a of the upright revetment 2 and the end surface 3a of the inclined revetment 3 which are flat. The water blocking structure 1 according to is described. The water-impervious structure 1 according to the first embodiment is, for example, a slope (the upper stone 10) of the sloped revetment 3 on the side surface 2a of the upright revetment, such as a place where the upright revetment 2 and the sloped revetment 3 intersect. The end face 3a orthogonal to the slope 10a) is adopted as the mating face of the side face 2a of the upright revetment 2 and the end face 3a of the inclined revetment 3 at the point where the end face 3a strikes.
第1の実施形態に係る遮水構造1として構成される、傾斜堤護岸3の直立堤護岸2側の端部の構造は次のように構成される。図1及び図2に示すように、ケーソン6の埋立処分域側に多数の下部石材11が積層される。下部石材11の表面は、水平面11a及び該水平面11aから連続して埋立処分域側に向かって下方傾斜する法面11bに形成される。下部石材11の水平面11a及び法面11bに沿って遮水シート8が敷設される。遮水シート8の直立堤護岸2側の端部は、直立堤護岸2の側面2aに近接して配置される。該遮水シート8上で、直立堤護岸2の側面2aから傾斜堤護岸3側に所定距離離れた位置に下部石材11の水平面11a及び法面11bに沿って型枠コンクリートブロック12が配置される。該型枠コンクリートブロック12は断面矩形状に形成される。該遮水シート8の上方で、直立堤護岸2の側面2aと型枠コンクリートブロック12との間にアスファルトマスチック14が充填される止水領域15が形成される。アスファルトマスチック14による止水領域15は断面矩形状である。 The structure of the end portion of the sloped revetment 3 on the side of the upright revetment 2 configured as the water blocking structure 1 according to the first embodiment is configured as follows. As shown in FIG. 1 and FIG. 2, a number of lower stones 11 are stacked on the side of the landfill area of the caisson 6. The surface of the lower stone 11 is formed on a horizontal surface 11a and a slope 11b which is downwardly inclined toward the landfill area side continuously from the horizontal surface 11a. The water blocking sheet 8 is laid along the horizontal surface 11 a and the slope 11 b of the lower stone 11. The end on the side of the upright bank revetment 2 of the water blocking sheet 8 is disposed close to the side 2 a of the upright bank revetment 2. Formwork concrete block 12 is disposed along horizontal surface 11a and slope 11b of lower stone 11 at a predetermined distance away from side 2a of upturned revetment 2 on the side of inclined revetment 3 on the water blocking sheet 8. . The formwork concrete block 12 is formed in a rectangular shape in cross section. Above the water blocking sheet 8, a water blocking area 15 is formed between the side surface 2a of the upright revetment 2 and the formwork concrete block 12 in which the asphalt mastic 14 is filled. The water blocking area 15 by the asphalt mastic 14 is rectangular in cross section.
アスファルトマスチック14は止水性を有することから止水材に相当する。該アスファルトマスチック14は、止水性を有し、20℃以下で固体化して、加熱することで固液変化(固体から液体への相変化)が進み100℃以上で液状化する性質を有し、また、常温時には外部からの圧力により任意形状に自己変形可能な性質を有するものである。アスファルトマスチック14による止水領域15は、断面において、下側に位置する第1層16と、上側に位置する第2層17とに分かれている。下側の第1層16は、遮水シート8上にアスファルトマスチック14のみが薄く(例えば厚さ1cm〜10cm)充填される層である。一方、上側の第2層17には、偏平率(例えば止水領域用石材18の長辺は短辺の3倍以下)等が考慮された断面略楕円形状の止水領域用石材18が多数積層されており、各止水領域用石材18、18間にアスファルトマスチック14が充填される層である。なお、第2層17に配置された複数の止水領域用石材18は、第2層17内のアスファルトマスチック14を、特に第1層16の法面上に均等に充填させるために配置される。止水領域15の第2層17に配置した多数の止水領域用石材18は、複数の金網19にそれぞれ分けて収容された状態で配置される。例えば、図2に示すように、第2層17において、多数の止水領域用石材18を収容した各金網19を、断面における上下方向に沿う各層ごとに配置してもよい。 The asphalt mastic 14 corresponds to a water blocking material because it has water blocking properties. The asphalt mastic 14 has a water-stopping property, solidifies at 20 ° C. or less, and has the property that solid-liquid change (phase change from solid to liquid) proceeds and liquidization occurs at 100 ° C. or higher by heating, In addition, it has the property of being self-deformable into an arbitrary shape by external pressure at normal temperature. The water blocking area 15 by the asphalt mastic 14 is divided into a lower first layer 16 and an upper second layer 17 in the cross section. The lower first layer 16 is a layer in which only the asphalt mastic 14 is thinly packed (for example, 1 cm to 10 cm in thickness) on the water blocking sheet 8. On the other hand, the second layer 17 on the upper side has a large number of stones 18 for a water blocking region having a substantially elliptical cross section in which the aspect ratio (for example, the long side of the stone 18 for water blocking is not more than 3 times the short side) is considered. It is a layer which is laminated and is filled with asphalt mastics 14 between the water blocking area stones 18 and 18. The plurality of water blocking zone stones 18 disposed in the second layer 17 are disposed to uniformly fill the asphalt mastic 14 in the second layer 17 particularly on the slope of the first layer 16. . A large number of water blocking area stones 18 disposed in the second layer 17 of the water blocking area 15 are disposed in a state of being separately stored in the plurality of wire nets 19 respectively. For example, as shown in FIG. 2, in the second layer 17, each wire mesh 19 accommodating a large number of stone materials 18 for water blocking area may be disposed for each layer along the vertical direction in the cross section.
アスファルトマスチック14による止水領域15内には伝熱部材である伝熱ロッド25が配置されている。伝熱ロッド25は、例えば、鉄製ロッドで構成される。伝熱ロッド25は、止水領域15の断面全体において、第2層17の直立堤護岸2側で、且つ下部石材11側に配置される。伝熱ロッド25は、止水領域15内を下部石材11の水平面11a及び法面11bに沿って挿入されている。伝熱ロッド25の上端部は外部に露出している。なお、伝熱ロッド25を止水領域15内に複数配置してもよい。例えば、複数の伝熱ロッド25を、止水領域15の水平方向に延びる部分と、止水領域15の埋立処分域に向かって下方傾斜する部分とにそれぞれ分けて配置してもよい。そして、外部に露出した伝熱ロッド25の上端部を加熱することによる伝熱ロッド25全体への熱伝導により、アスファルトマスチック14を加熱することができる。なお、止水領域15を構成するアスファルトマスチック14の直立堤護岸2側の部位を可能な限り早く固液変化させるために、伝熱ロッド25を止水領域15の直立堤護岸2側の部位に配置したほうがよい。また、本実施の形態では、伝熱ロッド25は、止水領域15の第2層17に配置されているが、第1層16の直立堤護岸2側で、且つ下部石材11側に配置してもよい。アスファルトマスチック14による止水領域15と下部石材11との間で、直立堤護岸2の側面2aと遮水シート8の端部との間に、下部規制部材26が配置される。 A heat transfer rod 25 which is a heat transfer member is disposed in the water blocking area 15 by the asphalt mastic 14. The heat transfer rod 25 is made of, for example, an iron rod. The heat transfer rod 25 is disposed on the side of the upright revetment 2 of the second layer 17 and on the lower stone 11 side in the entire cross section of the water blocking area 15. The heat transfer rod 25 is inserted in the water blocking area 15 along the horizontal surface 11 a and the slope 11 b of the lower stone 11. The upper end portion of the heat transfer rod 25 is exposed to the outside. A plurality of heat transfer rods 25 may be disposed in the water blocking area 15. For example, the plurality of heat transfer rods 25 may be separately disposed in the horizontally extending portion of the water blocking area 15 and the downwardly sloping portion of the water blocking area 15 toward the landfill disposal area. The asphalt mastic 14 can be heated by heat conduction to the entire heat transfer rod 25 by heating the upper end portion of the heat transfer rod 25 exposed to the outside. In addition, in order to change the portion on the side of the upright revetment 2 of the asphalt mastic 14 constituting the water blocking region 15 as fast as possible, the heat transfer rod 25 is placed on the portion of the water blocking region 15 on the upright revetment 2 side. It is better to arrange. Further, in the present embodiment, the heat transfer rod 25 is disposed in the second layer 17 of the water blocking area 15, but is disposed on the side of the upright revetment 2 of the first layer 16 and on the lower stone 11 side. May be A lower regulating member 26 is disposed between the water blocking area 15 of the asphalt mastic 14 and the lower stone 11, between the side surface 2 a of the upright revetment 2 and the end of the water blocking sheet 8.
下部規制部材26は、直立堤護岸2の側面2aから傾斜堤護岸3に向かう方向に沿って伸縮自在に構成される。下部規制部材26は、その一端部が直立堤護岸2の側面2aに接続されると共に、その他端部が遮水シート8の端部に接続される。該下部規制部材26は、図3(a)に示すように、シート状の不織布や土木シート等の一部に、直立堤護岸2の側面2aから傾斜堤護岸3に向かう方向に沿って伸縮自在になる蛇腹部40を設ける構成としてもよい。また、図3(b)に示すように、シート状の不織布や土木シートの一部に、直立堤護岸2の側面2aから傾斜堤護岸3に向かう方向に沿って伸縮自在になる折り畳み部41aと、引張力により容易に切断する弱化部41bとを一体的に設ける構成としてもよい。 The lower regulating member 26 is configured to be extensible along the direction from the side surface 2 a of the upright revetment 2 to the inclined revetment 3. The lower regulating member 26 has one end connected to the side surface 2 a of the upright revetment 2 and the other end connected to the end of the water blocking sheet 8. The lower regulating member 26 is stretchable along a direction from the side surface 2 a of the upright revetment 2 to the inclined revetment 3 as shown in FIG. It is good also as composition provided with the bellows part 40 which becomes. Further, as shown in FIG. 3 (b), the sheet-like nonwoven fabric or a part of the civil engineering sheet is foldable along a direction from the side 2a of the upright revetment 2 to the inclined revetment 3 and a foldable portion 41a. It is good also as composition provided integrally with weakening part 41b which cuts easily by tensile force.
また、下部規制部材26の一端部と直立堤護岸2の側面2aとの接続は、例えば、直立堤護岸2の側面2aからスタットボルト等の固定金具(図示略)を突出させて、該固定金具に下部規制部材26の一端部を接続する接続手段を採用しても良い。またその接続は、ブチルゴム等の両面粘着テープにより接続してもよい。なお、本実施形態では、下部規制部材26は、その他端部が遮水シート8の端部に接続されているが、型枠コンクリートブロック12の側面に接続してもよい。 Further, for connection between one end of the lower regulating member 26 and the side surface 2a of the upright revetment 2, for example, a fixing fitting (not shown) such as a stat bolt is projected from the side 2 a of the upright revetment 2 Alternatively, connection means for connecting one end of the lower regulating member 26 may be employed. The connection may be made by double-sided adhesive tape such as butyl rubber. In the present embodiment, the other end of the lower regulating member 26 is connected to the end of the water blocking sheet 8, but the lower regulating member 26 may be connected to the side surface of the formwork concrete block 12.
アスファルトマスチック14による止水領域15の上面には、アスファルトマスチック14を遮水シート8側に向かって押し込むために被覆用部材としてアスファルトマット27が配置される。この被覆用部材は、鉄板等の鋼材であってもよい。そして、アスファルトマスチック14が、被覆用アスファルトマット27からの押し込みにより、直立堤護岸2の側面2a及び遮水シート8の上面に密着することで、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとの合わせ面が液密的に密着して遮水される。被覆用アスファルトマット27の上方に上部規制部材30が配置される。なお、本実施形態では、上部規制部材30は、被覆用アスファルトマット27の上方に配置されているが、被覆用アスファルトマット27の下方に配置してもよい。 On the upper surface of the water blocking area 15 by the asphalt mastic 14, an asphalt mat 27 is disposed as a covering member in order to push the asphalt mastic 14 toward the water blocking sheet 8 side. The covering member may be a steel material such as an iron plate. Then, the asphalt mastic 14 is brought into close contact with the side surface 2 a of the upright revetment 2 and the upper surface of the water blocking sheet 8 by pushing from the covering asphalt mat 27 so that the side 2 a of the upright revetment 2 and the inclined revetment 3 The mating face with the end face 3a is in close contact in a liquid tight manner and the water is sealed. The upper regulating member 30 is disposed above the covering asphalt mat 27. In the present embodiment, the upper regulating member 30 is disposed above the covering asphalt mat 27, but may be disposed below the covering asphalt mat 27.
上部規制部材30は、下部規制部材26と同様に、直立堤護岸2の側面2aから傾斜堤護岸3に向かう方向に沿って伸縮自在に構成される。上部規制部材30は、その直立堤護岸2側の一端が直立堤護岸2の側面2aに接続されると共に、その他端が型枠コンクリートブロック12に接続される。本実施形態では、上部規制部材30は2枚の鋼製の板状部材31、32で構成される。これら2枚の板状部材31、32は重ねられ、伸縮自在になるように互いに連結されて一体的に構成される。そして、上部規制部材30を構成する一方の板状部材31の端部が直立堤護岸2の側面2aに接続されると共に、他方の板状部材32の端部が型枠コンクリートブロック12に接続される。この結果、上部規制部材30は、直立堤護岸2の側面2aから傾斜堤護岸3に向かう方向に沿って伸縮自在となる。上部規制部材30の上方に上部石材10が積層される。また、傾斜堤護岸3の裏込層7の、型枠コンクリートブロック12を境にした直立堤護岸2側と反対側は、下部石材11上の遮水シート8の上面に直接上部石材10が積層されて構成される。積層される上部石材10の表面は、下部石材11と同様に、水平面10a及び該水平面10aから連続して埋立処分域側に向かって下方傾斜する法面10bとして形成される。 Similar to the lower regulating member 26, the upper regulating member 30 is configured to be extensible and contractible along the direction from the side surface 2 a of the upright revetment 2 to the inclined revetment 3. One end of the upper regulating member 30 on the side of the upright revetment 2 is connected to the side surface 2 a of the upright revetment 2, and the other end is connected to the formwork concrete block 12. In the present embodiment, the upper regulating member 30 is formed of two steel plate members 31 and 32. The two plate-like members 31 and 32 are stacked and integrally connected to each other so as to be stretchable. Then, the end of one plate member 31 constituting the upper regulating member 30 is connected to the side surface 2 a of the upright revetment 2, and the end of the other plate member 32 is connected to the formwork concrete block 12. Ru. As a result, the upper regulating member 30 can be expanded and contracted along the direction from the side surface 2 a of the upright revetment 2 to the inclined revetment 3. The upper stone 10 is stacked above the upper regulating member 30. In addition, the upper stone 10 is laminated directly on the upper surface of the water blocking sheet 8 on the lower stone 11 on the opposite side of the upright revetment 2 side of the backfill layer 7 of the inclined revetment 3 with the formwork concrete block 12 at the boundary. And be configured. Similar to the lower stone 11, the surface of the upper stone 10 to be stacked is formed as a horizontal surface 10a and a slope 10b which is continuously inclined downward toward the landfill disposal side from the horizontal surface 10a.
そこで、一方の板状部材31の端部と直立堤護岸2の側面2aとの接続は、下部規制部材26と同様に、例えば、直立堤護岸2の側面2aからスタットボルト等の固定金具(図示略)を突出させて、該固定金具に一方の板状部材31の端部を接続する接続手段を採用しても良く、作業性が良好な他の接続手段、例えば、ブチルゴム等の両面粘着テープによる接続する接続手段を採用しても良い。一方、他方の板状部材32の端部と型枠コンクリートブロック12の上面との接続は、例えば、型枠コンクリートブロック12の上面からスタットボルトや吊具等の固定金具(図示略)を突出させて、該固定金具に他方の板状部材32の端部を接続する接続手段を採用しても良く、作業性が良好な他の接続手段を採用しても良い。 Therefore, the connection between the end of one plate-like member 31 and the side surface 2a of the upright revetment 2 is, for example, a fixing bracket such as a stat bolt from the side 2a of the upright revetment 2 (shown in FIG. Approximately) may be used, and connection means for connecting the end of one plate member 31 to the fixing bracket may be adopted, and other connection means having good workability, for example, double-sided adhesive tape such as butyl rubber Connection means for connection by means of On the other hand, for the connection between the end of the other plate member 32 and the upper surface of the formwork concrete block 12, for example, a fixing bracket (not shown) such as a stud bolt or a hanger is protruded from the upper surface of the formwork concrete block 12. Alternatively, a connection means for connecting the end of the other plate member 32 may be adopted as the fixing bracket, or another connection means having good workability may be adopted.
なお、上部規制部材30は、下部規制部材26と同様に、図3(a)に示すように、シート状の不織布や土木シート等の一部に、直立堤護岸2の側面2aから傾斜堤護岸3に向かう方向に沿って伸縮自在になる蛇腹部40を形成する構成としてもよい。また、図3(b)に示すように、シート状の不織布や土木シート等の一部に、直立堤護岸2の側面2aから傾斜堤護岸3に向かう方向に沿って伸縮自在になる折り畳み部41aと、引張力により容易に切断する弱化部41bとを一体的に設けた構成としてもよい。本実施形態では、上部規制部材30の他端(他方の板状部材32の端部)を型枠コンクリートブロック12の上面に接続しているが、上部規制部材30の他端(他方の板状部材32の端部)を被覆用アスファルトマット27の上面に接続しても良い。 The upper regulating member 30 is, as shown in FIG. 3A, similar to the lower regulating member 26, the sheet-like non-woven fabric, a part of a civil engineering sheet, etc. The bellows portion 40 may be configured to be stretchable along the direction 3. In addition, as shown in FIG. 3 (b), a folding portion 41 a which can extend and contract along a direction from the side surface 2 a of the upright revetment 2 to the inclined revetment 3 in a sheet non-woven fabric or a civil engineering sheet etc. And the weakening part 41b which cut | disconnects easily by tensile force is good also as a structure provided integrally. In the present embodiment, the other end of the upper regulating member 30 (the end of the other plate member 32) is connected to the upper surface of the formwork concrete block 12, but the other end of the upper regulating member 30 (the other plate The end of the member 32 may be connected to the top surface of the covering asphalt mat 27.
なお、傾斜堤護岸3の端部の裏込層7内には、上述したように配置される下部規制部材26、遮水シート8、止水領域15、被覆用アスファルトマット27、型枠コンクリートブロック12及び上部規制部材30が、断面における上下方向に沿って複数組施工されている。なお、図1および図2では、解り易くするために1組のみを示している。 In addition, the lower regulating member 26, the water blocking sheet 8, the water blocking area 15, the covering asphalt mat 27, and the formwork concrete block which are disposed as described above are provided in the backing layer 7 at the end of the inclined bank revetment 3. A plurality of sets 12 and upper regulation members 30 are constructed along the vertical direction in the cross section. 1 and 2 show only one set in order to make it easy to understand.
次に、本発明の実施形態に係る、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとの合わせ面における第1の実施形態に係る遮水構造1の施工方法を説明する。なお、ここでは、遮水シート8、型枠コンクリートブロック12、下部規制部材26、止水領域15、被覆用アスファルトマット27及び上部規制部材30を傾斜堤護岸3の端部の裏込層7内に1組施工する施工方法を説明する。 Next, the construction method of the water blocking structure 1 according to the first embodiment in the mating surface of the side surface 2 a of the upright revetment 2 and the end face 3 a of the inclined revetment 3 according to the embodiment of the present invention will be described. Here, the water blocking sheet 8, the formwork concrete block 12, the lower regulating member 26, the water blocking area 15, the covering asphalt mat 27 and the upper regulating member 30 are placed in the back-in layer 7 at the end of the inclined revetment 3. Explain the construction method to construct 1 pair construction.
まず、直立堤護岸2の側面2aに傾斜堤護岸3のケーソン6の端面3aを当接させる。続いて、傾斜堤護岸3のケーソン6の埋立処分域側に多数の下部石材11を積層して、その表面を水平面11a及び該水平面11aから連続して埋立処分域側に向かって下方傾斜する法面11bに形成する。続いて、下部石材11の水平面11a及び法面11b上に遮水シート8を敷設する。この時、遮水シート8の直立堤護岸2側の端部を直立堤護岸2の側面2aに近接させる。
次に、傾斜堤護岸3の遮水シート8上で、直立堤護岸2の側面2aから傾斜堤護岸3側に所定距離離れた位置に、下部石材11の水平面11a及び法面11bに沿って型枠コンクリートブロック12を配置する。
First, the end face 3 a of the caisson 6 of the inclined revetment 3 is brought into contact with the side surface 2 a of the upright revetment 2. Subsequently, a large number of lower stone materials 11 are stacked on the side of the landfill disposal side of the caisson 6 of the sloped revetment 3, and the surface is sloped downward toward the landfill disposal side continuously from the horizontal surface 11a and the horizontal surface 11a. It forms in the surface 11b. Subsequently, the water blocking sheet 8 is laid on the horizontal surface 11 a and the slope 11 b of the lower stone 11. At this time, the end of the water blocking sheet 8 on the side of the upright revetment 2 is brought close to the side surface 2 a of the upright revetment 2.
Next, on the impermeable sheet 8 of the sloped revetment 3, along the horizontal surface 11a and slope 11b of the lower stone 11 at a position separated by a predetermined distance from the side 2a of the upright revetment 2 to the sloped revetment 3 side. Place the frame concrete block 12
次に、下部規制部材26の直立堤護岸2側の一端部を直立堤護岸2の側面2aに接続すると共に、その他端部を遮水シート8の端部に接続する。
次に、直立堤護岸2の側面2aと傾斜堤護岸3の端部に備えた型枠コンクリートブロック12との間の遮水シート8上に、下部石材11の水平面11a及び法面11bに沿ってアスファルトマスチック14のみを充填して、アスファルトマスチック14のみが充填された薄い第1層16(止水領域15)を形成する。この時、直立堤護岸2の側面2aと遮水シート8の端部との間には下部規制部材26が配置されているので、アスファルトマスチック14が下部石材11側に流動することはない。続いて、複数の金網19に断面略楕円形状の多数の止水領域用石材18をそれぞれ収容する。その後、第1層16の上方に金網19に収容された多数の止水領域用石材18を順次積層する。さらに、直立堤護岸2側で、遮水シート8側の任意の位置の各止水領域用石材18、18間に、伝熱ロッド25を挿入しておく。この時、伝熱ロッド25の上端部が、上部石材10の積層後該上部石材10から外部に突出するように挿入しておく。続いて、アスファルトマスチック14を各金網19内の各止水領域用石材18、18間に充填して、第2層17(止水領域15)を形成する。
Next, one end of the lower regulating member 26 on the upright dike revetment 2 side is connected to the side surface 2 a of the upright dike revetment 2, and the other end is connected to the end of the water blocking sheet 8.
Next, along the horizontal surface 11 a and slope 11 b of the lower stone 11 on the water blocking sheet 8 between the side 2 a of the upright revetment 2 and the formwork concrete block 12 provided at the end of the inclined revetment 3. Only the asphalt mastic 14 is filled to form a thin first layer 16 (water-blocking area 15) in which only the asphalt mastic 14 is filled. At this time, since the lower regulating member 26 is disposed between the side surface 2 a of the upright revetment 2 and the end of the water blocking sheet 8, the asphalt mastic 14 does not flow to the lower stone 11 side. Subsequently, a plurality of stone nets 18 for water blocking area having a substantially elliptical cross section are respectively accommodated in a plurality of wire nets 19. Thereafter, a large number of water blocking area stones 18 accommodated in the wire mesh 19 are sequentially stacked above the first layer 16. Furthermore, the heat transfer rod 25 is inserted between the water blocking area stones 18 and 18 at an arbitrary position on the side of the water blocking sheet 8 on the upright bank and revetment 2 side. At this time, the upper end portion of the heat transfer rod 25 is inserted so as to protrude from the upper stone 10 to the outside after the upper stone 10 is stacked. Subsequently, the asphalt mastic 14 is filled between the water blocking area stones 18 in the wire mesh 19 to form the second layer 17 (water blocking area 15).
次に、アスファルトマスチック14による止水領域15の第2層17の上面に被覆用アスファルトマット27を配置する。該被覆用アスファルトマット27により、アスファルトマスチック14を遮水シート8側に押し込むようにする。この結果、被覆用アスファルトマット27による上方からの圧力(上載圧)により、止水領域15のアスファルトマスチック14が偏平状に自己変形しようとする力が生じ、止水領域15の直立堤護岸2側の面(アスファルトマスチック14)が直立堤護岸2の側面2aに液密的に密着すると共に、止水領域15の下面(アスファルトマスチック14)が遮水シート8に液密的に密着した状態を維持することができる。 Next, the covering asphalt mat 27 is disposed on the upper surface of the second layer 17 of the water blocking area 15 by the asphalt mastic 14. Asphalt mastic 14 is pushed into the side of the water blocking sheet 8 by the covering asphalt mat 27. As a result, a pressure (overpressure) from above by the covering asphalt mat 27 generates a force that causes the asphalt mastic 14 in the water blocking area 15 to self-deform in a flat shape, and the upright embankment 2 side of the water blocking area 15 (Asphalt mastic 14) adheres to the side 2a of the upright revetment 2 in a fluid tight manner, and the lower surface of the water blocking area 15 (asphalt mastic 14) maintains a fluid tight tightness to the impermeable sheet 8 can do.
次に、被覆用アスファルトマット27の上方に上部規制部材30を配置して、上部規制部材30としての、一方の板状部材31の直立堤護岸2側の端部を、直立堤護岸2の側面2aに接続する。続いて、上部規制部材30としての、他方の板状部材32の直立堤護岸2側とは反対側の端部を、型枠コンクリートブロック12に接続する。
次に、型枠コンクリートブロック12を境にした直立堤護岸2側は、型枠コンクリートブロック12を含む上部規制部材30の上面に、また、型枠コンクリートブロック12を境にした直立堤護岸2と反対側は、遮水シート8の上面に、多数の上部石材10を積層する。そして、上部石材10は、下部石材11と同様に、その表面を水平面10a及び該水平面10aから連続して埋立処分域側に向かって下方傾斜する法面10bに形成して、裏込層7を形成する。この時、伝熱ロッド25の上端部が上部石材10から僅かに外部に突出された状態となる。このようにして、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとの合わせ面における、第1の実施形態に係る遮水構造1を構築する。
Next, the upper regulating member 30 is disposed above the covering asphalt mat 27, and the end portion of one plate member 31 as the upper regulating member 30 on the upright dike revetment 2 side is a side face of the upright dike revetment 2. Connect to 2a. Subsequently, the end of the other plate member 32 as the upper regulating member 30 on the opposite side to the upright dike revetment 2 side is connected to the formwork concrete block 12.
Next, the erected revetment 2 side bordering the formwork concrete block 12 is the upper levee revetment 2 bordering the formwork concrete block 12 on the upper surface of the upper regulating member 30 including the formwork concrete block 12 and On the opposite side, a number of upper stones 10 are laminated on the upper surface of the water blocking sheet 8. Then, the upper stone 10, like the lower stone 11, is continuously formed from the horizontal surface 10a and the horizontal surface 10a on the sloped surface 10b that slopes downward toward the landfill area, and the backing layer 7 is formed. Form. At this time, the upper end portion of the heat transfer rod 25 is slightly protruded from the upper stone 10 to the outside. In this manner, the water blocking structure 1 according to the first embodiment is constructed on the mating surface of the side surface 2 a of the upright revetment 2 and the end face 3 a of the inclined revetment 3.
次に、本発明の第1の実施形態に係る遮水構造1の作用を説明する。
平常時には、図2に示すように、直立堤護岸2と傾斜堤護岸3とが直交する箇所等の、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとの合わせ面は、直立堤護岸2の側面2a及び傾斜堤護岸3の遮水シート8の上面に、傾斜堤護岸3の端部に備えた止水領域15(第1層16及び第2層17)を形成するアスファルトマスチック14が液密的に密着することで、その遮水性が確保されている。
Next, the operation of the water blocking structure 1 according to the first embodiment of the present invention will be described.
In normal times, as shown in FIG. 2, the mating surface of the side face 2a of the upright revetment 2 and the end face 3a of the inclined revetment 3, such as a place where the upright revetment 2 and the inclined revetment 3 intersect, Asphalt mastic 14 which forms the water blocking area 15 (the first layer 16 and the second layer 17) provided at the end of the sloped revetment 3 on the upper surface of the side 2a of the revetment 2 and the water blocking sheet 8 of the sloped revetment 3 The liquid tightness of the fluid tight seal ensures its impermeability.
そして、地震等の有事の際、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとが離れた場合、図4に示すように、直立堤護岸2の側面2aから傾斜堤護岸3の端部のアスファルトマスチック14(被覆用アスファルトマット27を含む)が離れて、上部規制部材30及び下部規制部材26がいずれも伸長するようになる。その結果、多数の上部石材10は、伸長した上部規制部材30により、直立堤護岸2の側面2aと傾斜堤護岸3の端部のアスファルトマスチック14との間の隙間35に入り込めなくなる。一方、伸長した下部規制部材26により、アスファルトマスチック14が下部石材11側に浸出するのを規制するようになる。
その後、図5に示すように、時間の経過と共に、すなわち、約1週間〜約1ヶ月程度の時間経過と共に、止水領域15のアスファルトマスチック14が被覆用アスファルトマット27からの上載圧により直立堤護岸2の側面2a側に自己変形して、隙間35を埋めて直立堤護岸2の側面2aに液密的に密着することで、遮水性を回復するようになる。
When the side 2a of the upright revetment 2 and the end face 3a of the inclined revetment 3 are separated in the event of an earthquake or the like, as shown in FIG. The asphalt mastic 14 (including the covering asphalt mat 27) at the end portion is separated, and both the upper regulating member 30 and the lower regulating member 26 extend. As a result, a large number of upper stone members 10 can not enter into the gap 35 between the side surface 2 a of the upright revetment 2 and the asphalt mastic 14 at the end of the inclined revetment 3 by the extended upper regulating member 30. On the other hand, the extended lower regulating member 26 regulates the leaching of the asphalt mastic 14 to the lower stone 11 side.
Thereafter, as shown in FIG. 5, with the passage of time, that is, with the passage of time from about one week to about one month, the asphalt mastic 14 of the water blocking area 15 is erected by the overburden from the covering asphalt mat 27. By self-deforming to the side 2a side of the revetment 2 and filling the gap 35 and adhering to the side 2a of the upright revetment 2 in a fluid tight manner, the impermeability is restored.
また、有事の際、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとが離れた後、止水領域15のアスファルトマスチック14を、伝熱ロッド25を介して加熱することでアスファルトマスチック14を軟化させてその自己変形を促進し、アスファルトマスチック14の直立堤護岸2の側面2aに向かう自己変形を早めて、アスファルトマスチック14による直立堤護岸2の側面2aへの密着を早めるようにしている。これにより、数日程度で、アスファルトマスチック14を直立堤護岸2の側面2aに密着させることができる。 In the event of an emergency, after the side face 2a of the upright revetment 2 and the end face 3a of the inclined revetment 3 are separated, the asphalt mastic 14 in the water blocking area 15 is heated via the heat transfer rod 25 14 to soften the self-deformation so as to accelerate self-deformation toward the side 2a of the upright revetment 2 of the asphalt mastic 14 and to accelerate adhesion of the upright revetment 2 to the side 2a by the asphalt mastic 14 There is. As a result, the asphalt mastic 14 can be brought into close contact with the side surface 2 a of the upright revetment 2 in several days.
以上説明したように、本発明の第1の実施形態に係る遮水構造1では、特に、伸縮自在の上部規制部材30を備え、該上部規制部材30は上部石材10と被覆用アスファルトマット27(止水領域15)との間に延び、その直立堤護岸2側の一端が直立堤護岸2の側面2aに接続されると共に、その他端が型枠コンクリートブロック12に接続される。これにより、地震等の有事の際、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとが離れた場合、上部規制部材30が伸長するので、伸長した上部規制部材30により、多数の上部石材10が、直立堤護岸2の側面2aと傾斜堤護岸3の端部のアスファルトマスチック14との間の隙間35に入り込めなくなり、時間の経過と共にアスファルトマスチック14が自己変形して、その隙間35を埋めて直立堤護岸2の側面2aに液密的に密着することで、遮水性を回復させることができる。 As described above, the water blocking structure 1 according to the first embodiment of the present invention particularly includes the stretchable upper regulating member 30, and the upper regulating member 30 includes the upper stone 10 and the covering asphalt mat 27 ( One end of the upright revetment 2 side is connected to the side 2 a of the upright revetment 2 and the other end is connected to the formwork concrete block 12. Thus, when the side face 2a of the upright revetment 2 and the end face 3a of the inclined revetment 3 are separated at the time of an emergency such as an earthquake, the upper restricting member 30 is extended. The upper stone 10 can not get into the gap 35 between the side 2 a of the upright revetment 2 and the asphalt mastic 14 at the end of the inclined revetment 3, and the asphalt mastic 14 self-deforms with the passage of time, and the gap By filling 35 and bringing it into close contact with the side 2 a of the upright revetment 2, the impermeability can be restored.
また、本発明の第1の実施形態に係る遮水構造1では、特に、伸縮自在の下部規制部材26を備え、該下部規制部材26は、止水領域15と下部石材11との間に延び、その直立堤護岸2側の一端が直立堤護岸2の側面2aに接続されると共に、その他端が遮水シート8に接続される。これにより、有事の際、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとが離れた場合、伸長した下部規制部材26により、アスファルトマスチック14が下部石材11側に自己変形して浸出するのを規制することができ、アスファルトマスチック14がその隙間35を埋める方向に自己変形して、直立堤護岸2の側面2aに液密的に密着するようになる。 Moreover, in the water blocking structure 1 according to the first embodiment of the present invention, in particular, the stretchable lower regulating member 26 is provided, and the lower regulating member 26 extends between the water blocking area 15 and the lower stone 11. One end of the upright revetment 2 side is connected to the side 2 a of the upright revetment 2, and the other end is connected to the impermeable sheet 8. Thereby, when the side 2a of the upright revetment 2 and the end face 3a of the inclined revetment 3 are separated in the event of an emergency, the asphalt mastic 14 self-deforms to the lower stone 11 side by the extended lower regulating member 26 and leaches out And the asphalt mastic 14 self-deforms in the direction of filling the gap 35 and comes into tight contact with the side surface 2 a of the upright revetment 2.
さらに、本発明の第1の実施形態に係る遮水構造1では、アスファルトマスチック14による止水領域15内において直立堤護岸2側で、且つ遮水シート8側の位置に伝熱ロッド25が配置されているので、有事の際、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとが離れた後、止水領域15のアスファルトマスチック14を、伝熱ロッド25を介して加熱してアスファルトマスチック14の自己変形を促進することにより、アスファルトマスチック14による直立堤護岸2の側面2aへの密着を早めることができる。 Furthermore, in the water blocking structure 1 according to the first embodiment of the present invention, the heat transfer rod 25 is disposed at a position on the upright bank revetment 2 side and the water blocking sheet 8 side in the water blocking region 15 by the asphalt mastic 14 Therefore, in case of emergency, after the side 2a of the upright revetment 2 and the end face 3a of the inclined revetment 3 are separated, the asphalt mastic 14 in the water blocking area 15 is heated via the heat transfer rod 25 By promoting the self-deformation of the asphalt mastic 14, the adhesion of the upright mast revetment 2 to the side surface 2 a of the asphalt mastic 14 can be accelerated.
さらにまた、本発明の第1の実施形態に係る遮水構造1では、アスファルトマスチック14による止水領域15が、遮水シート8に密着して、アスファルトマスチック14のみが充填される第1層16と、該第1層16の上方に配置され、多数の止水領域用石材18、18間にアスファルトマスチック14が充填される第2層17とを備えているので、止水領域15と遮水シート8との間の境界面の遮水性を確保でき、止水領域用石材18の積層とアスファルトマスチック14の充填とを交互に行うのみの従来方法よりも、その遮水性を格段に向上させることができる。また、止水領域15の第2層17では、各止水領域用石材18が各金網19に収容され拘束された状態で積層されるために、各止水領域用石材18が法面(第1層16の法面)に沿って滑動し難くなり、各止水領域用石材18を法面に沿って安定して配置することができ、かつ作業性を格段に向上させることができる。 Furthermore, in the water blocking structure 1 according to the first embodiment of the present invention, the water blocking area 15 by the asphalt mastic 14 is in close contact with the water blocking sheet 8 and the first layer 16 is filled with only the asphalt mastic 14 And the second layer 17 disposed above the first layer 16 and filled with the asphalt mastic 14 between the large number of water blocking area stones 18 and 18, the water blocking area 15 and the water blocking It is possible to ensure the water blocking of the interface between the sheet 8 and to significantly improve the water blocking as compared with the conventional method in which the lamination of the water blocking zone stone 18 and the filling of the asphalt mastic 14 are alternately performed. Can. Further, in the second layer 17 of the water blocking area 15, the stones 18 for the water blocking area are stacked in a state of being accommodated and restrained in the respective wire nets 19. It becomes difficult to slide along the slopes of the first layer 16), and it is possible to stably arrange each water blocking zone stone material 18 along the slopes, and the workability can be remarkably improved.
次に、鋼板セル、鋼管矢板または鋼矢板等により構成され、その側面2aが曲面である直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとの合わせ面に採用される、本発明の第2の実施形態に係る遮水構造1aを図6〜図16に基づいて説明する。なお、以下に説明する第2の実施形態に係る遮水構造1aは、上部規制部材30a及び下部規制部材26aが、図1〜図5に示す第1の実施形態に係る遮水構造1と相違するので、上部規制部材30a及び下部規制部材26aの構成を主に説明する。 Next, according to the present invention, a steel plate cell, a steel pipe sheet pile, a steel sheet pile or the like is employed as a mating surface of the side surface 2a of the upright revetment 2 and the end surface 3a of the inclined revetment 3 whose side surface 2a is a curved surface. A water blocking structure 1a according to a second embodiment will be described based on FIGS. The water blocking structure 1a according to the second embodiment described below differs from the water blocking structure 1 according to the first embodiment shown in FIGS. 1 to 5 in the upper regulating member 30a and the lower regulating member 26a. Therefore, the configurations of the upper regulating member 30a and the lower regulating member 26a will be mainly described.
上部規制部材30a及び下部規制部材26aは、図6〜図10に示すように、平面視矩形状の第1シート38と、該第1シート38の上面に配置される、平面視蒲鉾状の第2シート39とから構成される。第1シート38及び第2シート39は、それぞれポリエチレン製の遮水シートで形成される。なお、第1シート38及び第2シート39は、不織布や土木シートであってもよい。第2シート39は第1シート38よりもその面積が小さく形成される。一方向における、第1シート38の一端部と、第2シート39の湾曲部と反対側の一端部とが略一致するように、且つ他方向(一方向と直交する方向)における第1シート38の両端部と、第2シート39の両端部とが略一致するように、第1シート38上に第2シート39が配置される。第2シート39の湾曲縁の全範囲と第1シート38の上面とが熱溶着部40にて接合されている。これにより、上部規制部材30a及び下部規制部材26aは、一方向における一端部側が、第1シート38及び第2シート39からなる2層の部位として形成され、一方向における他端部側が、第1シート38のみとなる1層の部位として形成されることになる。 The upper restricting member 30a and the lower restricting member 26a are, as shown in FIGS. 6 to 10, a first sheet 38 having a rectangular shape in a plan view and a first sheet 38 having a rectangular shape in a plan view. And a sheet 39. The first sheet 38 and the second sheet 39 are each formed of a water-impervious sheet made of polyethylene. The first sheet 38 and the second sheet 39 may be a non-woven fabric or a civil engineering sheet. The second sheet 39 is formed to have a smaller area than the first sheet 38. The first sheet 38 in the other direction (direction orthogonal to one direction) such that one end of the first sheet 38 and one end of the second sheet 39 on the opposite side substantially coincide with each other in one direction. The second sheet 39 is disposed on the first sheet 38 such that both ends of the second sheet 39 substantially coincide with both ends of the second sheet 39. The entire range of the curved edge of the second sheet 39 and the upper surface of the first sheet 38 are joined at a heat weld 40. Thereby, the upper regulating member 30a and the lower regulating member 26a are formed such that one end side in one direction is a portion of two layers consisting of the first sheet 38 and the second sheet 39, and the other end side in one direction is the first It will be formed as a part of one layer which becomes only the sheet 38.
第1シート38には、第2シート39が配置される範囲において、その一方向における一端部から放射状に複数の切り込み部42が形成される。一方、第2シート39には、その一方向における一端部から、湾曲部である他端部に至る範囲まで切り込み部43が放射状に複数形成される。第2シート39の各切り込み部43は、平面視で第1シート38の各切り込み部41の間に位置する。なお、第2シート39の湾曲部の曲率は、例えば、直立堤護岸2の鋼板セルの曲面の曲率を略同一である。 In the first sheet 38, a plurality of notches 42 are formed radially from one end in one direction in a range in which the second sheet 39 is disposed. On the other hand, a plurality of notches 43 are radially formed in the second sheet 39 from the one end in one direction to the other end which is the curved portion. The notches 43 of the second sheet 39 are located between the notches 41 of the first sheet 38 in plan view. The curvature of the curved portion of the second sheet 39 is, for example, substantially the same as the curvature of the curved surface of the steel plate cell of the upright revetment 2.
そして、下部規制部材26aを配置する際には、図11、図12及び図15に示すように、図6も参照しながら、傾斜堤護岸3のケーソン6の埋立処分域側に多数の下部石材11を積層して、その表面を水平面11a及び該水平面11aから連続して埋立処分域側に向かって下方傾斜する法面11bに形成した後、下部規制部材26aの一方向における他端部側である第1シート38(1層の部位)を直立堤護岸2の側面2aの曲面に沿うように、例えばブチルゴム等の両面粘着テープにより接続する。 And when arranging the lower control member 26a, as shown in FIG. 11, FIG. 12 and FIG. 15, referring to FIG. 6 also, many lower stone materials on the landfill disposal side of the caisson 6 of the inclined revetment 3 11 are stacked, and the surface is formed on a horizontal surface 11a and a slope 11b which is downwardly inclined toward the landfill area continuously from the horizontal surface 11a, and then on the other end side in one direction of the lower regulating member 26a A first sheet 38 (one layer portion) is connected along a curved surface of the side surface 2 a of the upright revetment 2 by, for example, a double-sided adhesive tape such as butyl rubber.
続いて、下部規制部材26aの所定部位を略直角に折り曲げて、外方に向かって立ち上がった一方向における一端部側の第1シート38及び第2シート39(2層の部位)を下部石材11の水平面11aまたは法面11b上に配置する。第1シート38が直接下部石材11の水平面11aまたは法面11b上に接触する。この時、折り曲げた第1シート38及び第2シート39(2層の部位)は、図11及び図12に示すように、第1シート38の各切り込み部42が外方に向かうにつれて大きく開いた状態となり、また第2シート39の各切り込み部43も外方に向かうにつれて大きく開いた状態で下部石材11の水平面11aまたは法面11b上に配置される。しかしながら、第1シート38の各切り込み部42と、第2シート39の各切り込み部43とは平面視で互いに相違した位置に形成されているために、この2層の部位にて上下方向に沿って開口される部位は現出しない。続いて、この第1シート38及び第2シート39(2層の部位)の上面に遮水シート8を敷設する。その後は、前述したように、型枠コンクリートブロック12を配置した後、アスファルトマスチック14による止水領域15を形成する。 Subsequently, a predetermined portion of the lower regulating member 26a is bent at a substantially right angle, and the first sheet 38 and the second sheet 39 (portions of two layers) on one end side in one direction which has risen outward are made of lower stone 11 It arranges on the horizontal surface 11a or slope 11b. The first sheet 38 directly contacts the horizontal surface 11 a or slope 11 b of the lower stone 11. At this time, as shown in FIGS. 11 and 12, the first sheet 38 and the second sheet 39 (portions of two layers) which are folded open widely as the cut portions 42 of the first sheet 38 go outward. It will be in a state, and each cut part 43 of the 2nd sheet 39 will also be arranged on the horizontal surface 11a or slope 11b of the lower stone 11 in the state widely opened as it goes outward. However, since the respective notches 42 of the first sheet 38 and the respective notches 43 of the second sheet 39 are formed at positions different from each other in plan view, the two layers extend in the vertical direction. The site that is opened is not revealed. Subsequently, the water blocking sheet 8 is laid on the upper surfaces of the first sheet 38 and the second sheet 39 (portions of two layers). Thereafter, as described above, after the formwork concrete block 12 is placed, the water blocking area 15 is formed by the asphalt mastic 14.
その後、上部規制部材30aを配置する際には、図13〜図15に示すように、図6も参照しながら、上部規制部材30aの一方向における一端部側である第1シート38及び第2シート39(2層の部位)を直立堤護岸2の側面2aの曲面に沿って配置して、第1シート38と直立堤護岸2の側面2aとを、例えばブチルゴム等の両面粘着テープにより接続する。この時、第1シート38及び第2シート39(2層の部位)は、図13及び図14に示すように、第1シート38の各切り込み部42が上端に向かうにつれて大きく開いた状態となり、また第2シート39の各切り込み部43も上端に向かうにつれて大きく開いた状態で直立堤護岸2の側面2aの曲面に沿って配置される。しかしながら、第1シート38の各切り込み部42と、第2シート39の各切り込み部43とは平面視で互いに相違した位置に形成されているために、この2層の部位にて径方向に沿って開口される部位は現出しない。 Thereafter, when arranging the upper regulating member 30a, as shown in FIGS. 13 to 15, also referring to FIG. 6, the first sheet 38 and the second sheet which are one end side in one direction of the upper regulating member 30a. The sheet 39 (two-layered part) is disposed along the curved surface of the side 2a of the upright revetment 2 and the first sheet 38 and the side 2a of the upright revetment 2 are connected by double-sided adhesive tape such as butyl rubber. . At this time, as shown in FIGS. 13 and 14, the first sheet 38 and the second sheet 39 (portions of two layers) are in a state of being largely opened as the cut portions 42 of the first sheet 38 go to the upper end, The notches 43 of the second sheet 39 are also arranged along the curved surface of the side surface 2 a of the upright revetment 2 in a state of being largely opened toward the upper end. However, since each cut portion 42 of the first sheet 38 and each cut portion 43 of the second sheet 39 are formed at positions different from each other in a plan view, along the radial direction in the two layers The site that is opened is not revealed.
続いて、上部規制部材30aの所定部位を略直角に折り曲げ、外方に向かって立ち上がった一方向における他端部側の第1シート38(1層の部位)をアスファルトマスチック14による止水領域15a上に配置する。続いて、この第1シート38(1層の部位)の上面に被覆用アスファルトマスチック27を配置する。その後は、前述したように、上部石材10を積層して、最終的に裏込層7を形成する。 Subsequently, a predetermined portion of the upper regulating member 30a is bent at a substantially right angle, and the first sheet 38 (a portion of one layer) on the other end side in one direction which has risen outward is a water blocking area 15a by the asphalt mastic 14 Place on top. Subsequently, the covering asphalt mastic 27 is disposed on the upper surface of the first sheet 38 (one layer portion). Thereafter, as described above, the upper stone 10 is laminated to finally form the backing layer 7.
次に、本発明の第2の実施形態に係る遮水構造1aの作用を説明する。
平常時には、図15に示すように、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとの合わせ面は、直立堤護岸2の側面2a及び傾斜堤護岸3の遮水シート8の上面に、傾斜堤護岸3の端部に備えた止水領域15(第1層16及び第2層17)を形成するアスファルトマスチック14が液密的に密着することで、その遮水性が確保されている。
Next, the operation of the water blocking structure 1a according to the second embodiment of the present invention will be described.
Normally, as shown in FIG. 15, the mating surface of the side 2a of the upright revetment 2 and the end face 3a of the inclined revetment 3 is the upper surface of the side 2a of the upright revetment 2 and the upper surface of the water blocking sheet 8 of the inclined revetment 3. As the asphalt mastic 14 forming the water blocking area 15 (the first layer 16 and the second layer 17) provided at the end of the sloped revetment 3 adheres in a fluid tight manner, its water blocking property is secured. There is.
そして、地震等の有事の際、図16に示すように、直立堤護岸2の側面2aから傾斜堤護岸3の端部のアスファルトマスチック14(被覆用アスファルトマット27を含む)が離れても、上部規制部材30aが、直立堤護岸2の側面2aとアスファルトマスチック14による止水領域15との間の隙間35を上側から覆うので、該隙間35内に多数の上部石材10が入り込めなくなる。一方、下部規制部材26aにより隙間35を下側から覆うので、アスファルトマスチック14が下部石材11側に自己変形して浸出するのを規制するようになる。 When an earthquake or the like occurs, as shown in FIG. 16, even if the asphalt mastic 14 (including the covering asphalt mat 27) at the end of the inclined revetment 3 is separated from the side 2 a of the upright revetment 2, the upper part Since the restricting member 30 a covers the gap 35 between the side surface 2 a of the upright revetment 2 and the water blocking area 15 by the asphalt mastic 14 from the upper side, many upper stones 10 can not enter into the gap 35. On the other hand, since the gap 35 is covered from the lower side by the lower regulating member 26a, the asphalt mastic 14 is restricted from being deformed and leached to the lower stone 11 side.
その後、図16に示すように、時間の経過と共に、止水領域15のアスファルトマスチック14が被覆用アスファルトマット27からの上載圧により直立堤護岸2の側面2a側に自己変形して、隙間35を埋めて直立堤護岸2の側面2aに液密的に密着することで、遮水性を回復するようになる。 Thereafter, as shown in FIG. 16, with the passage of time, the asphalt mastic 14 in the water blocking area 15 self-deforms on the side 2 a side of the upright revetment 2 by the overpressure from the covering asphalt mat 27, and the gap 35 Immersion and close contact with the side 2 a of the upright revetment 2 will restore the impermeability.
以上説明したように、本発明の第2の実施形態に係る遮水構造1aでは、特に、上部石材10とアスファルトマスチック14による止水領域15との間に延びる上部規制部材30aと、アスファルトマスチック14による止水領域15と下部石材11との間に延びる下部規制部材26aとを備えている。これにより、地震等の有事の際、上述した第1の実施形態に係る遮水構造1と同様に、直立堤護岸2の側面2aと傾斜堤護岸3の端面3aとが離れた場合でも、上部規制部材30aにより、多数の上部石材10が、直立堤護岸2の側面2aと傾斜堤護岸3の端部のアスファルトマスチック14との間の隙間35に入り込めなくなり、さらに、下部規制部材26aにより、アスファルトマスチック14が下部石材11側に自己変形して浸出するのを規制することができるので、時間の経過と共にアスファルトマスチック14が、その隙間35を埋める方向に自己変形して、直立堤護岸2の側面2aに液密的に密着することで、遮水性を回復させることができる。 As described above, in the water blocking structure 1 a according to the second embodiment of the present invention, in particular, the upper regulating member 30 a extending between the upper stone 10 and the water blocking area 15 by the asphalt mastic 14, and the asphalt mastic 14 And a lower regulating member 26 a extending between the water blocking area 15 and the lower stone 11. Thereby, even when the side surface 2a of the upright revetment 2 and the end face 3a of the inclined revetment 3 are separated, similarly to the water blocking structure 1 according to the first embodiment described above, in the event of an earthquake etc. The restriction member 30a prevents the large number of upper stones 10 from entering the gap 35 between the side surface 2a of the upright revetment 2 and the asphalt mastic 14 at the end of the inclined revetment 3, and further by the lower restriction member 26a. As the asphalt mastic 14 can be restricted from self-deformation and leaching to the lower stone 11 side, the asphalt mastic 14 self-deforms in a direction to fill the gap 35 with the passage of time, and By sealing the side surface 2a in a liquid tight manner, the water blocking can be restored.
1、1a 遮水構造,2 直立堤護岸,2a 側面,3 傾斜堤護岸,3a 端面,7 裏込層,8 遮水シート,10 上部石材,11 下部石材,14 アスファルトマスチック(止水材),15 止水領域,16 第1層,17 第2層,18 止水領域用石材,25 伝熱ロッド(伝熱部材),26、26a 下部規制部材,30、30a 上部規制部材,31 一方の板状部材,32 他方の板状部材,38 第1シート,39 第2シート,42 切り込み部(第1シート),43 切り込み部(第2シート) 1, 1a impermeable structure, 2 upright revetment, 2a side, 3 inclined revetment, 3a end face, 7 back layer, 8 impermeable sheet, 10 upper stone, 11 lower stone, 14 asphalt mastic (water blocking material), 15 water stop area, 16 first layer, 17 second layer, 18 stone material for water stop area, 25 heat transfer rod (heat transfer member), 26, 26a lower regulating member, 30, 30a upper regulating member, 31 one plate Members, 32 other plate members, 38 first sheet, 39 second sheet, 42 notches (first sheet), 43 notches (second sheet)
Claims (5)
前記傾斜堤護岸は、その内部に前記直立堤護岸の側面と密着するようにして充填され、外力により任意形状へ自己変形すると共に加熱により固液変化が進行する止水材と、
該止水材の上方及び下方に配置される多数の石材と、
前記直立堤護岸の側面に接続され、前記止水材と前記上方の各石材との間に向かって延び、前記上方の各石材の、前記止水材側への移動を規制するシート状の上部規制部材と、を備えることを特徴とする遮水構造。 A water blocking structure at the mating surface of the side of the upright revetment and the end face of the inclined revetment,
The sloped revetment is filled so as to be in intimate contact with the side of the upright revetment, and is self-deforming to an arbitrary shape by an external force and a solid-liquid change progresses by heating;
A number of stones arranged above and below the water blocking material,
A sheet-like upper portion connected to the side surface of the upright revetment, extending toward the space between the water blocking material and the stones above, and restricting the movement of the stones above the water toward the water blocking material And a restricting member.
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