JPH0657756A - Reinforcing earth process of cut slope face - Google Patents
Reinforcing earth process of cut slope faceInfo
- Publication number
- JPH0657756A JPH0657756A JP23312292A JP23312292A JPH0657756A JP H0657756 A JPH0657756 A JP H0657756A JP 23312292 A JP23312292 A JP 23312292A JP 23312292 A JP23312292 A JP 23312292A JP H0657756 A JPH0657756 A JP H0657756A
- Authority
- JP
- Japan
- Prior art keywords
- precast plate
- mounting
- precast
- stage
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Retaining Walls (AREA)
- Piles And Underground Anchors (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主として切土法面を安
定化させるための補強土工法及びそれに用いるコンクリ
ートプレキャスト板に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a reinforced earth method for stabilizing a cut slope and a concrete precast plate used for the method.
【０００２】[0002]
【従来の技術】近年、切土法面を安定化させるため、切
土法面から内部に鉄筋を打ち込む鉄筋挿入工法が用いら
れることが多く、急勾配にも対応でき、しかも工期の短
縮が図れるのであるが、従来のモタレ式擁壁工法や法枠
工法に比べて長期的な信頼性での問題点があるため、現
在のところ仮設土留の代替工法として用いられているの
である。また、従来の鉄筋挿入工法では外面がモルタル
吹付面となるため美観の点からも不良であった。2. Description of the Related Art In recent years, in order to stabilize a cut slope, a reinforcing bar insertion method of driving a reinforcing bar into the cut slope is often used, which can cope with steep slopes and can shorten the construction period. However, it has a problem with long-term reliability compared to the conventional motar type retaining wall method and frame method, so it is currently used as an alternative method for temporary soil retention. Further, in the conventional reinforcing bar insertion method, the outer surface becomes a mortar sprayed surface, which is also unsatisfactory in terms of aesthetics.
【０００３】[0003]
【発明が解決しようとする課題】そこで本発明は、急勾
配にも対応できると共に、経済的で工期の短縮が図れ、
美観が優れて長期的な信頼性も確保でき、永久構造体化
できる工法及びそれに用いるコンクリートプレキャスト
板を提供するものである。Therefore, the present invention can cope with a steep slope, is economical, and can shorten the construction period.
It is intended to provide a method for producing a permanent structure and a concrete precast plate used for the method, which has an excellent aesthetic appearance and can secure long-term reliability.
【０００４】[0004]
【課題を解決するための手段】このため本発明工法は、
形成しようとする補強土面の上端から下に向けて一段目
のコンクリートプレキャスト板を据付けできる高さの装
着面を掘削した段部を確保し、プレキャスト板を並列配
置するための載置用係合レールを装着面側の該段部上に
固定し、該係合レールにプレキャスト板を係合して並列
配置すると共に、プレキャスト板の上端に天端用係合レ
ールを被着して天端用係合レールを装着面側に固定する
ことでプレキャスト板を仮止めし、ついで夫々のプレキ
ャスト板に透設された取付孔から装着面側に削孔して取
付孔から該削孔部に鉄筋等の棒状補強材を挿入した後、
該削孔部及びプレキャスト板の裏側間隙にモルタルを注
入し、夫々補強材の突出端部を取付孔部で固着してプレ
キャスト板に一体連結し、該モルタルの乾燥後、上から
二段目にコンクリートプレキャスト板を据付けできる高
さの取付面を掘削した段部を形成し、該段部に載置用係
合レールを配置固定して二段目のプレキャスト板を係合
載置すると共に、夫々一段目のプレキャスト板の載置用
係合レールを外した下端部とその上端を連結して二段目
のプレキャスト板を仮止めし、二段目のプレキャスト板
に透設された取付孔から削孔して取付孔から該削孔部に
棒状補強材を挿入した後、該削孔部及び二段目のプレキ
ャスト板の裏側間隙にモルタルを注入し、夫々補強材の
突出端部を取付孔部に固着して二段目のプレキャスト板
に一体連結し、これを繰り返すことで複数段にプレキャ
スト板を備えた補強土面を形成する補強土工法としてい
る。また、その工法に用いるコンクリートプレキャスト
板は、補強材を挿通する取付孔部に、内側にすぼむ形状
の円周内面を有する受け環を補強筋に連結させ内蔵固定
して該円周内面を取付孔の一部として成り、該受け環の
円周内面で補強材のネジ部に螺着したナットを受ける構
成としている。Therefore, the method of the present invention is
Engagement for placement to secure a step part where the mounting surface of the first stage concrete precast plate is excavated from the upper end of the reinforced soil surface to be formed and the precast plate is arranged in parallel. The rail is fixed on the stepped portion on the mounting surface side, the precast plate is engaged with the engagement rail and arranged in parallel, and the top end of the precast plate is attached with the top end engagement rail for the top end. The precast plates are temporarily fixed by fixing the engaging rails to the mounting surface side, and then the mounting holes formed through the respective precast plates are drilled to the mounting surface side, and the reinforcing holes are attached to the drilled holes from the mounting holes. After inserting the rod-shaped reinforcement of
Mortar is injected into the hole and the backside gap of the precast plate, and the protruding ends of the reinforcing members are fixed to the mounting holes and integrally connected to the precast plate. After drying the mortar, the second step from the top is performed. A step portion is formed by excavating a mounting surface of a height at which a concrete precast plate can be installed, and a mounting engagement rail is arranged and fixed on the step portion to engage and mount the second-stage precast plate. The lower end of the first-stage precast plate with the mounting engagement rail removed and the upper end are connected to temporarily fix the second-stage precast plate, and the second-stage precast plate is cut through the mounting holes provided transparently. After inserting a rod-shaped reinforcing material from the mounting hole into the drilled hole, mortar is injected into the hole and the back side gap of the second-stage precast plate, and the protruding end of the reinforcing material is attached to the mounting hole. Fixed to the second stage precast plate and integrally connected, And a reinforcing earthwork method for forming a reinforced soil surface with a precast plate in a plurality of stages by repeating. In addition, the concrete precast plate used for the method has a mounting ring portion through which a reinforcing material is inserted, a receiving ring having a circumferential inner surface that is recessed inwardly connected to the reinforcing bar, and is internally fixed to fix the inner circumferential surface. The nut is formed as a part of the mounting hole and receives the nut screwed to the thread portion of the reinforcing member on the inner circumferential surface of the receiving ring.
【０００５】[0005]
【作用】本発明工法では、補強土面を上端から下に向け
て順次形成するもので、まず、コンクリートプレキャス
ト板を並列据付けできる高さの装着面を掘削した平坦な
段部を確保し、プレキャスト板を並列配置するための載
置用係合レールを装着面側の該段部上に水平出ししてア
ンカーピン等で固定し、該係合レールにコンクリートプ
レキャスト板を係合して並列配置すると共に、プレキャ
スト板の上端に天端用係合レールを被着して天端用係合
レールをアンカーピン等で装着面側に固定する。これに
より、プレキャスト板が並列状態で仮止めされるのであ
る。ついで夫々のプレキャスト板に透設された取付孔か
ら装着面側に削孔し、取付孔から該削孔部に鉄筋等の棒
状補強材を挿入した後、該削孔部にモルタルを注入する
と共に、土面とプレキャスト板の裏側間隙にモルタルを
注入して裏込を施す。また、夫々取付孔から突出してい
る補強材の突出端部に螺着したナット等を取付孔部に固
着することで、該モルタルの乾燥によってプレキャスト
板に補強材が一体連結されるのである。In the method of the present invention, the reinforced soil surface is sequentially formed from the upper end to the bottom. First, a flat step portion is prepared by excavating the mounting surface of a height at which the concrete precast boards can be installed in parallel, and the precast The mounting engaging rails for arranging the plates in parallel are horizontally placed on the stepped portion on the mounting surface side and fixed with anchor pins or the like, and the concrete precast plates are engaged with the engaging rails and arranged in parallel. At the same time, a top end engagement rail is attached to the upper end of the precast plate, and the top end engagement rail is fixed to the mounting surface side with an anchor pin or the like. As a result, the precast plates are temporarily fixed in parallel. Next, after drilling holes from the mounting holes formed transparently through the respective precast plates to the mounting surface side and inserting a rod-shaped reinforcing material such as a reinforcing bar into the drilled holes through the mounting holes, mortar is injected into the drilled holes. , Inject mortar into the gap between the soil surface and the backside of the precast plate to backfill. Further, by fixing nuts or the like screwed to the protruding ends of the reinforcing members protruding from the mounting holes to the mounting holes, the reinforcing member is integrally connected to the precast plate by drying the mortar.
【０００６】そして、上から二段目にコンクリートプレ
キャスト板を据付けできる高さの取付面を掘削した段部
を形成し、該段部に載置用係合レールを配置固定して二
段目のプレキャスト板を係合載置すると共に、夫々一段
目のプレキャスト板の載置用係合レールを外した下端部
とその上端をボルト等で連結することにより二段目のプ
レキャスト板が仮止めされるのである。前記同様に、二
段目のプレキャスト板に透設された取付孔から削孔して
棒状補強材を挿入し、該削孔部及び二段目のプレキャス
ト板の裏側間隙にモルタルを注入し、夫々補強材の突出
端部を取付孔部に固着することで補強材が二段目のプレ
キャスト板に一体連結され、一段目と二段目のプレキャ
スト板が一体となるのである。これを繰り返すことで複
数段にプレキャスト板を備えた補強土面が形成されるの
である。Then, a step portion is formed by excavating a mounting surface of a height at which the concrete precast plate can be installed on the second step from the top, and a mounting engagement rail is arranged and fixed on the step portion to fix the second step. The second-stage precast plate is temporarily fixed by engaging and mounting the precast plate and connecting the lower end of the first-stage precast plate from which the mounting engagement rail is removed and the upper end thereof with bolts or the like. Of. In the same manner as described above, a rod-shaped reinforcing material is drilled from the mounting hole that is transparently provided in the second-stage precast plate, and mortar is injected into the hole and the backside gap of the second-stage precast plate, respectively. By fixing the protruding end of the reinforcing member to the mounting hole, the reinforcing member is integrally connected to the second-stage precast plate, and the first-stage and second-stage precast plates are integrated. By repeating this, the reinforced soil surface provided with the precast plates in multiple stages is formed.
【０００７】また、その工法に用いるコンクリートプレ
キャスト板は、プレキャスト板の補強材を挿通する取付
孔部に内側にすぼむ形状の円周内面を有する受け環が内
蔵固定してあるため、補強材のネジ部に螺着したナット
の締め付けを該受け環の円周内面で受け、しかも受け環
が補強筋に連結してあることから不動状態となって補強
材の抜けを防止でき補強材を強く一体化できるのであ
る。Further, the concrete precast plate used in the construction method has a receiving ring having a circumferential inner surface that is recessed inwardly fixed in the mounting hole portion through which the reinforcing member of the precast plate is inserted, The tightening of the nut screwed on the screw part of the receiving ring is received on the inner surface of the circumference of the receiving ring, and the receiving ring is connected to the reinforcing bar, so that it is in an immovable state and it is possible to prevent the reinforcing material from coming off and strengthen the reinforcing material. It can be integrated.
【０００８】[0008]
【実施例】以下、本発明のコンクリートプレキャスト板
の一実施例を説明しながら本発明工法の一実施例もあわ
せて説明する。図１は本例工法の施工による補強土面の
縦断面図であり、それに用いるコンクリートプレキャス
ト板を図２に示す。該プレキャスト板１は、長さ及び巾
が1.5ｍで厚みが８cmの大きさであり、その中央部には
内側にすぼむ形状の円周内面を有する受け環１１を縦横
の補強筋１２に連結溶接して収容固定され、その円周内
面を開口させて取付孔１３が透設してある。また、上端
は突段部１７の形状として下端の突段部１５と係合でき
る形状とし、中央上部にはモルタル注入孔１４が透設し
てある。EXAMPLES An example of the concrete precast plate of the present invention will be described below, together with an example of the method of the present invention. FIG. 1 is a longitudinal sectional view of a reinforced soil surface constructed by the construction method of this example, and FIG. 2 shows a concrete precast plate used for the construction. The precast plate 1 has a length and width of 1.5 m and a thickness of 8 cm, and a receiving ring 11 having a circumferential inner surface that is recessed inward is formed at the center of the precast plate 1 in vertical and horizontal reinforcing bars 12. It is connected and welded to be accommodated and fixed, and an attachment hole 13 is formed so as to open the inner surface of the circumference thereof. Further, the upper end has a shape of a projecting portion 17 that can be engaged with the lower projecting portion 15, and a mortar injection hole 14 is provided in the center upper portion.
【０００９】本例工法は、まず、法面の上端から下に向
けて一段目のコンクリートプレキャスト板１を並列でき
る高さ分の約1.5ｍの装着面を掘削した段部２１を整形
確保する。ついで、図３のように、プレキャスト板１を
並列配置するための載置用係合レール３を装着面側の該
段部上に設置し、アンカーピン３１を打ち込んで載置用
係合レール３を水平に固定する。そして、該係合レール
３にプレキャスト板１の下端突段部１５を係合して並列
配置すると共に、プレキャスト板１の上端突段部１７に
天端用係合レール４を被着しアンカーピン４１を打ち込
んで天端用係合レール４を装着面側に固定することでプ
レキャスト板１を仮止め保持する。In the construction method of this example, first, the stepped portion 21 is excavated and secured by excavating the mounting surface of about 1.5 m, which is the height at which the first-stage concrete precast plate 1 can be juxtaposed downward from the upper end of the slope. Then, as shown in FIG. 3, a mounting engagement rail 3 for arranging the precast plates 1 in parallel is installed on the step portion on the mounting surface side, and an anchor pin 31 is driven in to mount the mounting engagement rail 3 thereon. Is fixed horizontally. Then, the lower end projecting portion 15 of the precast plate 1 is engaged with the engaging rail 3 and arranged in parallel, and the upper end projecting portion 17 of the precast plate 1 is covered with the upper end engaging rail 4 to attach the anchor pin. The precast plate 1 is temporarily fixed and held by driving in 41 to fix the top end engaging rail 4 to the mounting surface side.
【００１０】ついで図４のように、夫々の削孔機によっ
てプレキャスト板１に透設された取付孔１３から装着面
側に約５ｍ削孔し、取付孔１３から該削孔部１６に異形
鉄筋５を挿入した後、図５のように、取付孔１３から該
削孔部１６にモルタル６を注入すると共に、土面とプレ
キャスト板１の裏側間隙に注入孔１４からモルタル６を
注入しグラウトを施す。そのグラウト後、一日養生し、
図６のように、取付孔１３に突出している夫々の異形鉄
筋５のネジ端部５１に台形ナット７を螺着し受け環１１
に当接させる。これにより、異形鉄筋５が台形ナット７
を介してプレキャスト板１に一体連結し、モルタル６を
介してプレキャスト板１が法面に定着する。なお、取付
孔１３の前部空間部にはモルタルを注入する。Then, as shown in FIG. 4, about 5 m is drilled from the mounting holes 13 formed through the precast plate 1 to the mounting surface side by the respective drilling machines, and the deformed reinforcing bars are formed from the mounting holes 13 to the drilled portions 16. After inserting 5, the mortar 6 is injected into the drilled hole portion 16 from the mounting hole 13 and the mortar 6 is injected into the gap between the soil surface and the back side of the precast plate 1 from the injection hole 14 as shown in FIG. Give. After the grout, he cured for a day,
As shown in FIG. 6, the trapezoidal nut 7 is screwed onto the screw end portion 51 of each deformed rebar 5 protruding into the mounting hole 13 to receive the ring 11.
Abut. As a result, the deformed rebar 5 becomes trapezoidal nut 7
The precast plate 1 is integrally connected to the precast plate 1, and the precast plate 1 is fixed on the slope via the mortar 6. It should be noted that mortar is injected into the front space of the mounting hole 13.
【００１１】該モルタルの乾燥後、アンカーピン３１を
抜いて載置用係合レール３を外すと共に、アンカーピン
４１を抜いて天端用係合レール４を外す。ついで、同様
に、上から二段目にコンクリートプレキャスト板を据付
けできる高さの取付面を掘削した段部２２を形成し、図
７のように、該段部２２に載置用係合レール３をアンカ
ーピン３１で配置固定し、二段目のプレキャスト板１の
下端突段部１５を載置用係合レール３に係合載置すると
共に、夫々突段部１７とした上端部を一段目のプレキャ
スト板の下端突段部１５と合わせボルト１８で連結して
二段目のプレキャスト板１を仮止めする。なお、プレキ
ャスト板１の係合は、図８のように、突段部１５，１７
に夫々埋め込まれたプレート１９部でのネジ止めによっ
て固定するのである。After the mortar is dried, the anchor pin 31 is pulled out to remove the mounting engagement rail 3 and the anchor pin 41 is removed to remove the ceiling end engagement rail 4. Then, similarly, a step portion 22 is formed by excavating a mounting surface of a height at which the concrete precast plate can be installed in the second step from the top, and as shown in FIG. 7, the mounting engagement rail 3 is mounted on the step portion 22. Are fixed and fixed by anchor pins 31, the lower end protruding steps 15 of the second-stage precast plate 1 are engaged and mounted on the mounting engagement rails 3, and the upper ends of the protruding steps 17 are set to the first step. The precast plate 1 of the second stage is temporarily fixed by connecting it to the lower end protruding portion 15 of the precast plate of FIG. In addition, the engagement of the precast plate 1 is as shown in FIG.
It is fixed by screwing at the plate 19 portion embedded in each.
【００１２】そして、図９のように、二段目のプレキャ
スト板１に透設された取付孔１３から削孔して取付孔１
３から該削孔部１６に異形鉄筋５を挿入し、前記同様
に、該削孔部１６とプレキャスト板１の裏側間隙にモル
タル６を注入する。グラウト後、一日養生し、夫々の異
形鉄筋５のネジ端部５１に台形ナット７を螺着し受け環
１１に当接させプレキャスト板１に一体連結し、モルタ
ル６を介してプレキャスト板１が法面に定着する。Then, as shown in FIG. 9, the mounting hole 1 is formed by drilling from the mounting hole 13 formed through the second precast plate 1.
The deformed bar 5 is inserted into the drilled portion 16 from 3 and the mortar 6 is injected into the gap between the drilled portion 16 and the back side of the precast plate 1 in the same manner as described above. After grouting, curing for one day, trapezoidal nuts 7 are screwed to the screw ends 51 of each deformed bar 5 and brought into contact with the receiving ring 11 to be integrally connected to the precast plate 1, and the precast plate 1 is connected via the mortar 6. Settle on the slope.
【００１３】そしてまた、同様に、上から三段目にコン
クリートプレキャスト板を据付けできる高さの取付面を
掘削した段部を形成し、載置用係合レールの設置、三段
目のプレキャスト板の仮止め、削孔部の穿設、異形鉄筋
の挿入、該削孔部とプレキャスト板の裏側間隙にモルタ
ルを注入、養生後異形鉄筋の台形ナットによる連結、載
置用係合レールの除去の各工程を繰り返すことで、図１
のように、複数段にプレキャスト板１を備えた補強土面
を形成するのである。Similarly, a step portion is formed by excavating a mounting surface of a height at which the concrete precast plate can be installed in the third step from the top, installation of mounting rails for mounting, and precast plate in the third step. Temporary fixing, drilling a hole, inserting a deformed bar, injecting mortar into the gap between the hole and the back side of the precast plate, after curing, connecting the deformed bar with a trapezoidal nut, and removing the mounting engagement rail. By repeating each step,
As described above, the reinforced soil surface provided with the precast plates 1 in a plurality of stages is formed.
【００１４】本例工法によると、プレキャスト板１がそ
の上端突段部１７を天端用係合レール４或いは上のプレ
キャスト板１の下端突段部１５とボルト１８連結すると
共に、その下端突段部１５を載置用係合レール３に係合
して仮止めし、この状態でグラウト、及び装着面部へモ
ルタル注入することからプレキャスト板１が不動で安定
装着でき、しかも異形鉄筋５の端部で螺着した台形ナッ
ト７を受け環１１で受け止めるため異形鉄筋５がプレキ
ャスト板１に一体連結できて定着確保できるのである。
したがって、プレキャスト板１が剥離して落下すること
がないのである。According to the construction method of this embodiment, the precast plate 1 connects the upper end projecting portion 17 to the ceiling engaging rail 4 or the lower end projecting portion 15 of the upper precast plate 1 by the bolt 18, and the lower projecting portion thereof is connected. The part 15 is engaged with the mounting engagement rail 3 and temporarily fixed, and in this state, mortar is injected into the grout and the mounting surface part, so that the precast plate 1 can be stably and stably mounted, and the end portion of the deformed rebar 5 Since the trapezoidal nut 7 screwed in is received by the receiving ring 11, the deformed bar 5 can be integrally connected to the precast plate 1 to secure the fixing.
Therefore, the precast plate 1 does not peel off and fall.
【００１５】このように本例によると、上から順次、土
留と同時にプレキャスト板を据付けする工事であるため
占用用地幅を小さくできると共に、土工事量を少なくで
き、工期の短縮が図れるのである。また、法面がプレキ
ャスト板となるため外観が良好で、プレキャスト板の仕
上げ次第によって美観をさらに良好とすることができる
のである。As described above, according to this example, since the precast plate is installed simultaneously with the soil retention from the top, the space for exclusive use can be reduced, the amount of earthwork can be reduced, and the construction period can be shortened. Further, since the slope is a precast plate, the appearance is good, and the appearance can be further improved depending on the finish of the precast plate.
【００１６】また、本例のプレキャスト板１によると、
台形ナット７を受ける受け環１１を内蔵し、且つ補強筋
１２に固定してあるため、台形ナット７との係合を確保
できることから異形鉄筋５がプレキャスト板１に一体連
結できて定着を確保できるのである。According to the precast plate 1 of this example,
Since the receiving ring 11 that receives the trapezoidal nut 7 is built in and is fixed to the reinforcing bar 12, the engagement with the trapezoidal nut 7 can be ensured, so that the deformed bar 5 can be integrally connected to the precast plate 1 and the fixation can be secured. Of.
【００１７】本例工法及びプレキャスト板は夫々前記の
ように構成したが、本発明においてはこれに限定されな
い。例えば、工法発明では、形成しようとする補強土面
の傾斜勾配は問わず、垂直勾配まで適用できるのであ
る。また、プレキャスト板を並列配置するための載置用
係合レール及び天端用係合レールの形状、構成は適宜で
あり、プレキャスト板を止着できればよい。Although the construction method and the precast plate of this example are each constructed as described above, the present invention is not limited to this. For example, in the construction method invention, a vertical gradient can be applied regardless of the gradient gradient of the reinforced soil surface to be formed. Further, the shapes and configurations of the mounting engagement rails and the top end engagement rails for arranging the precast plates in parallel are appropriate, as long as the precast plates can be fixed.
【００１８】さらに、該削孔部に挿入する棒状補強材も
任意であり、該削孔部及びプレキャスト板の裏側間隙に
モルタルを注入する手段も問わない。なお、夫々補強材
の突出端部を取付孔部で固着してプレキャスト板に一体
連結する構成も適宜である。また、上下のプレキャスト
板の接合構成も限定されず、図１０或いは図１１のよう
に連結してもよい。さらに、各段のプレキャスト板の並
置も問わず、図１２のように、夫々側端の突段部を係合
させて並置する構成でもよい。Further, the rod-shaped reinforcing material to be inserted into the drilled portion is optional, and the means for injecting mortar into the gap between the drilled portion and the back side of the precast plate is not limited. It should be noted that a configuration in which the protruding ends of the reinforcing members are fixed to each other by the mounting holes and integrally connected to the precast plate is also appropriate. Further, the joining structure of the upper and lower precast plates is not limited, and the precast plates may be connected as shown in FIG. 10 or 11. Further, regardless of the juxtaposition of the precast plates in each step, as shown in FIG. 12, the protruding step parts at the respective side ends may be engaged and juxtaposed.
【００１９】また、コンクリートプレキャスト板におい
ては、補強材を挿通する取付孔の数及び位置は問わず、
取付孔の一部として成る受け環を補強筋に係止する構成
も適宜である。さらに、プレキャスト板の大きさ及び形
状も任意である。In the concrete precast board, the number and position of the mounting holes for inserting the reinforcing material are not limited.
A configuration in which the receiving ring that is a part of the mounting hole is locked to the reinforcing bar is also appropriate. Further, the size and shape of the precast plate are also arbitrary.
【００２０】[0020]
【発明の効果】本工法発明によると、上から順次、土留
と同時にプレキャスト板を据付けする工事であるため占
用用地幅を小さくできると共に、土工事量を少なくで
き、工期の短縮が図れるのである。また、プレキャスト
板の定着が確保できるため信頼性を高くできて永久構造
体にできること、及び法面がプレキャスト板となるため
外観が良好で、プレキャスト板の仕上げ次第によって美
観をさらに良好とすることができる効果が大きい。ま
た、請求項２のプレキャスト板は、ナットとの係合を確
保できることから補強材をプレキャスト板に一体連結で
きてプレキャスト板の定着を確保できるのである。According to the present invention, since the precast plate is installed at the same time as the soil retention, the space for exclusive use can be reduced and the amount of earthwork can be reduced and the construction period can be shortened. Further, since the fixing of the precast plate can be ensured, the reliability can be made high and a permanent structure can be obtained, and the appearance becomes good because the slope becomes the precast plate, and the aesthetic appearance can be further improved depending on the finish of the precast plate. It has a great effect. Further, in the precast plate according to the second aspect, since the engagement with the nut can be ensured, the reinforcing material can be integrally connected to the precast plate and the fixing of the precast plate can be ensured.
【図１】本発明工法の一実施例による切土法面の縦断面
図である。FIG. 1 is a vertical cross-sectional view of a cut slope according to an embodiment of the method of the present invention.
【図２】コンクリートプレキャスト板の一実施例を示す
要部を切欠した斜視図である。FIG. 2 is a perspective view showing an example of a concrete precast plate with a main part cut away.
【図３】一段目を掘削して段部を確保し、載置用係合レ
ールを固定した状態の縦断面図である。FIG. 3 is a vertical cross-sectional view showing a state in which the step portion is secured by excavating the first step and the mounting engagement rail is fixed.
【図４】一段目のプレキャスト板を仮止めし、削孔した
状態の縦断面図である。FIG. 4 is a vertical cross-sectional view showing a state in which the first-stage precast plate is temporarily fixed and holes are drilled.
【図５】削孔部に異形鉄筋を挿入してグラウトし、プレ
キャスト板の裏面にモルタルを注入した状態の縦断面図
である。FIG. 5 is a vertical cross-sectional view showing a state in which a deformed bar is inserted into a drilled portion, grouted, and mortar is injected into the back surface of the precast plate.
【図６】プレキャスト板の取付孔で異形鉄筋を連結した
状態の拡大縦断面図である。FIG. 6 is an enlarged vertical sectional view showing a state in which deformed reinforcing bars are connected to each other through mounting holes of a precast plate.
【図７】二段目のプレキャスト板を仮止めした状態の縦
断面図である。FIG. 7 is a vertical cross-sectional view showing a state where the second-stage precast plate is temporarily fixed.
【図８】上下のプレキャスト板の接合部を示す拡大縦断
面図である。FIG. 8 is an enlarged vertical cross-sectional view showing a joint portion between upper and lower precast plates.
【図９】二段目の削孔部に異形鉄筋を挿入してグラウト
し、プレキャスト板の裏面にモルタルを注入した状態の
縦断面図である。FIG. 9 is a vertical cross-sectional view showing a state in which a deformed reinforcing bar is inserted into the second-stage drilled portion, grouting, and mortar is injected into the back surface of the precast plate.
【図１０】上下のプレキャスト板の接合部の別例を示す
拡大縦断面図である。FIG. 10 is an enlarged vertical cross-sectional view showing another example of the joint portion between the upper and lower precast plates.
【図１１】上下のプレキャスト板の接合部のさらに別例
を示す縦断面図である。FIG. 11 is a vertical cross-sectional view showing still another example of the joint portion between the upper and lower precast plates.
【図１２】横方向のプレキャスト板の接合部の別例を示
す横断面図である。FIG. 12 is a transverse cross-sectional view showing another example of the joining portion of the horizontal precast plate.
１ プレキャスト １１ 受け環 １２ 補強筋 １３ 取付孔 １４ モルタル注入孔 １５ 下端の突段部 １６ 削孔部 １７ 上端の突段部 １８ ボルト １９ プレート ２１，２２ 段部 ３ 載置用係合レール ３１ アンカーピン ４ 天端用係合レール ４１ アンカーピン ５ 異形鉄筋 ５１ ネジ端部 ６ モルタル ７ 台形ナット DESCRIPTION OF SYMBOLS 1 Precast 11 Receiving ring 12 Reinforcing bar 13 Mounting hole 14 Mortar injection hole 15 Lower end projecting part 16 Drilling part 17 Upper projecting part 18 Bolt 19 Plate 21, 22 Step part 3 Mounting engagement rail 31 Anchor pin 4 Top rail engaging rail 41 Anchor pin 5 Deformed bar 51 Screw end 6 Mortar 7 Trapezoid nut
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年７月２６日[Submission date] July 26, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】全文[Correction target item name] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【発明の名称】 切土法面等の補強土工法 [ Title of Invention] Reinforced earthwork method such as cut slope
【特許請求の範囲】[Claims]
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は、切土法面を安定化させ
るための補強土工法に関するものである。The present invention relates are those which relate to a reinforced soil construction method for stabilizing the cut slope.
【０００２】[0002]
【従来の技術】近年、切土法面を安定化させるため、切
土法面から内部に鉄筋を打ち込む鉄筋挿入工法が用いら
れることが多く、急勾配にも対応でき、しかも工期の短
縮が図れるのであるが、従来のモタレ式擁壁工法や法枠
工法に比べて長期的な信頼性での問題点があるため、現
在のところ仮設土留の代替工法として用いられているの
である。また、従来の鉄筋挿入工法では外面がモルタル
吹付面となるため美観の点からも不良であった。2. Description of the Related Art In recent years, in order to stabilize a cut slope, a reinforcing bar insertion method of driving a reinforcing bar into the cut slope is often used, which can cope with steep slopes and can shorten the construction period. However, it has a problem with long-term reliability compared to the conventional motar type retaining wall method and frame method, so it is currently used as an alternative method for temporary soil retention. Further, in the conventional reinforcing bar insertion method, the outer surface becomes a mortar sprayed surface, which is also unsatisfactory in terms of aesthetics.
【０００３】[0003]
【発明が解決しようとする課題】そこで本発明は、急勾
配にも対応できると共に、経済的で工期の短縮が図れ、
美観が優れて長期的な信頼性も確保でき、永久構造体化
できる工法を提供するものである。Therefore, the present invention can cope with a steep slope, is economical, and can shorten the construction period.
It provides a construction method that is aesthetically pleasing, secures long-term reliability, and can be made into a permanent structure.
【０００４】[0004]
【課題を解決するための手段】このため本発明工法は、
形成しようとする補強土面の上端から下に向けて一段目
のコンクリートプレキャスト板を据付けできる高さの装
着面を掘削した段部を形成し、該装着面と一定の間隙を
おいて装着面にプレキャスト板を並列配置し、ついで夫
々のプレキャスト板に透設された取付孔から装着面側に
削孔して取付孔から該削孔部に鉄筋等の棒状補強材を挿
入した後、該削孔部及びプレキャスト板の裏側間隙にモ
ルタルを注入し、夫々補強材の突出端部を取付孔部で固
着してプレキャスト板に一体連結しプレキャスト板を装
着面に定着した後、上から二段目にコンクリートプレキ
ャスト板を据付けできる高さの取付面を掘削した段部を
形成し、装着面側との間に間隙をおいて夫々一段目のプ
レキャスト板の下端部に二段目のプレキャスト板を連結
し、二段目のプレキャスト板に透設された取付孔から削
孔して取付孔から該削孔部に棒状補強材を挿入した後、
該削孔部及び二段目のプレキャスト板の裏側間隙にモル
タルを注入し、夫々補強材の突出端部を取付孔部に固着
して二段目のプレキャスト板に一体連結し、これを繰り
返すことで複数段にプレキャスト板を備えた補強土面を
形成する工法としている。また、形成しようとする補強
土面の上端から下に向けて一段目のコンクリートプレキ
ャスト板を据付けできる高さの装着面を掘削した段部を
確保し、プレキャスト板を並列配置するための載置用係
合レールを装着面側の該段部上に固定し、該係合レール
にプレキャスト板を係合して並列配置すると共に、プレ
キャスト板の上端に天端用係合レールを被着して天端用
係合レールを装着面側に固定することでプレキャスト板
を仮止めし、ついで夫々のプレキャスト板に透設された
取付孔から装着面側に削孔して取付孔から該削孔部に鉄
筋等の棒状補強材を挿入した後、該削孔部及びプレキャ
スト板の裏側間隙にモルタルを注入し、夫々補強材の突
出端部を取付孔部で固着してプレキャスト板に一体連結
し、該モルタルの乾燥後、上から二段目にコンクリート
プレキャスト板を据付けできる高さの取付面を掘削した
段部を形成し、該段部に載置用係合レールを配置固定し
て二段目のプレキャスト板を係合載置すると共に、夫々
一段目のプレキャスト板の載置用係合レールを外した下
端部とその上端を連結して二段目のプレキャスト板を仮
止めし、二段目のプレキャスト板に透設された取付孔か
ら削孔して取付孔から該削孔部に棒状補強材を挿入した
後、該削孔部及び二段目のプレキャスト板の裏側間隙に
モルタルを注入し、夫々補強材の突出端部を取付孔部に
固着して二段目のプレキャスト板に一体連結し、これを
繰り返すことで複数段にプレキャスト板を備えた補強土
面を形成する補強土工法としている。Therefore, the method of the present invention is
First step from top to bottom of the reinforced soil surface to be formed
The height of equipment for installing concrete precast boards
Form a stepped part by excavating the mounting surface and make a certain gap with the mounting surface.
Place the precast boards side by side on the mounting surface, and then
From the mounting holes that are transparently installed on each precast plate to the mounting surface side
Drill a hole and insert a rod-shaped reinforcing material such as a reinforcing bar from the mounting hole into the hole.
After inserting, insert the moth into the hole and the backside gap of the precast plate.
Lutar is injected, and the protruding ends of the reinforcements are fixed in the mounting holes.
Wear it and attach it to the precast board and attach the precast board.
After fixing on the landing surface, concrete concrete
The stepped portion where the mounting surface of the height at which the cast plate can be installed is excavated.
Formed, and leave a gap between the mounting surface side and the
Connect the second stage precast plate to the lower end of the recast plate
The mounting holes through the second-stage precast plate.
After inserting the rod-shaped reinforcing material into the drilled portion from the mounting hole,
The holes and the back side gap of the second-stage precast plate
Inject tar and fix the protruding end of each reinforcing material to the mounting hole
Then, integrally connect it to the second-stage precast board and repeat this.
By returning it, the reinforced soil surface equipped with precast boards in multiple stages
The construction method is used . Also, to secure the step part where the mounting surface is excavated from the upper end of the reinforced soil surface to be formed downwards so that the first stage concrete precast plate can be installed, and to place the precast plate in parallel. The engagement rail is fixed on the stepped portion on the mounting surface side, the precast plate is engaged with the engagement rail and arranged in parallel, and the top end engagement rail is attached to the upper end of the precast plate to attach it to the ceiling. By temporarily fixing the precast plate by fixing the end engagement rail to the mounting surface side, then drilling holes from the mounting holes penetrating through each precast plate to the mounting surface side and then from the mounting holes to the drilled part. After inserting a rod-shaped reinforcing material such as a reinforcing bar, mortar is injected into the drilled portion and the back side gap of the precast plate, and the protruding ends of the reinforcing members are fixed to the mounting hole portions and integrally connected to the precast plate, respectively. After drying the mortar, A step portion is formed by excavating a mounting surface having a height at which a cleat precast plate can be installed, and a mounting engagement rail is arranged and fixed on the step portion to engage and mount the second-stage precast plate, and respectively. The lower end of the first-stage precast plate with the mounting engagement rail removed and the upper end are connected to temporarily fix the second-stage precast plate, and the second-stage precast plate is cut through the mounting holes provided transparently. After inserting a rod-shaped reinforcing material from the mounting hole into the drilled hole, mortar is injected into the hole and the back side gap of the second-stage precast plate, and the protruding end of the reinforcing material is attached to the mounting hole. It is a solid earth construction method that forms a reinforced soil surface with a plurality of stages of precast plates by fixing it to and integrally connecting it to the second stage precast plate.
【０００５】[0005]
【作用】本発明工法では、補強土面を上端から下に向け
て順次形成するもので、まず、コンクリートプレキャス
ト板を並列据付けできる高さの装着面を掘削した平坦な
段部を形成し、装着面側とに間隙をおいてプレキャスト
板を並列配置する。ついで夫々のプレキャスト板に透設
された取付孔から装着面側に削孔し、取付孔から該削孔
部に鉄筋等の棒状補強材を挿入した後、該削孔部にモル
タルを注入すると共に、土面とプレキャスト板の裏側間
隙にモルタルを注入して裏込を施す。また、夫々取付孔
から突出している補強材の突出端部にナットを螺着する
等して取付孔部に固着することで、該モルタルの乾燥に
よってプレキャスト板に補強材が一体連結されるのであ
る。According to the present invention method is for sequentially formed toward the lower reinforcing soil surface from the upper end, first, a flat stepped portion drilled mounting surface height can installed parallel concrete precast plates, mounted Precast with a gap on the surface side
Arrange the boards in parallel. Next, after drilling holes from the mounting holes formed transparently through the respective precast plates to the mounting surface side and inserting a rod-shaped reinforcing material such as a reinforcing bar into the drilled holes through the mounting holes, mortar is injected into the drilled holes. , Inject mortar into the gap between the soil surface and the backside of the precast plate to backfill. In addition, nuts are screwed onto the protruding ends of the reinforcing members protruding from the mounting holes.
By fixing the mortar to the mounting hole portion in the same manner, the reinforcing material is integrally connected to the precast plate by drying the mortar.
【０００６】そして、上から二段目にコンクリートプレ
キャスト板を据付けできる高さの取付面を掘削した段部
を形成し、夫々一段目のプレキャスト板の下端部とその
上端をボルトで連結する等により二段目のプレキャスト
板が仮止めされるのである。前記同様に、二段目のプレ
キャスト板に透設された取付孔から削孔して棒状補強材
を挿入し、該削孔部及び二段目のプレキャスト板の裏側
間隙にモルタルを注入し、夫々補強材の突出端部を取付
孔部に固着することで補強材が二段目のプレキャスト板
に一体連結され、一段目と二段目のプレキャスト板が一
体となるのである。これを繰り返すことで複数段にプレ
キャスト板を備えた補強土面が形成されるのである。[0006] Then, a step portion is formed by excavating a mounting surface at a height at which the concrete precast plate can be installed in the second step from the top, and the lower end portion of the first precast plate and the step part thereof are formed.
The second-stage precast plate is temporarily fixed by connecting the upper end with a bolt . In the same manner as described above, a rod-shaped reinforcing material is drilled from the mounting hole that is transparently provided in the second-stage precast plate, and mortar is injected into the hole and the backside gap of the second-stage precast plate, respectively. By fixing the protruding end of the reinforcing member to the mounting hole, the reinforcing member is integrally connected to the second-stage precast plate, and the first-stage and second-stage precast plates are integrated. By repeating this, the reinforced soil surface provided with the precast plates in multiple stages is formed.
【０００７】なお、プレキャスト板の設置に際して、プ
レキャスト板を並列配置するための載置用係合レールを
装着面側の該段部上に水平出ししてアンカーピン等で固
定し、該係合レールにコンクリートプレキャスト板を係
合して並列配置すると共に、プレキャスト板の上端に天
端用係合レールを被着して天端用係合レールをアンカー
ピン等で装着面側に固定してもよい。二段目のプレキャ
スト板も載置用係合レールに載置し、夫々一段目のプレ
キャスト板の下端部とその上端をボルト等で連結するこ
とにより二段目のプレキャスト板が仮止めされるのであ
る。 When installing the precast plate,
A mounting engagement rail for arranging the recast plates in parallel
Place it horizontally on the step on the mounting surface side and secure it with an anchor pin, etc.
The concrete precast plate on the engaging rail.
And place them side-by-side and place them on the top of the precast plate
Attach the end engagement rail and anchor the top end engagement rail.
You may fix to a mounting surface side with a pin etc. Second stage pre-cap
The strike plates are also placed on the mounting engagement rails, and the first stage
Connect the lower end of the cast plate and its upper end with bolts, etc.
Will temporarily secure the second precast plate.
It
【０００８】[0008]
【実施例】以下、本発明の詳細を図面を参照しながら説
明する。図１は本例工法の施工による補強土面の縦断面
図であり、それに用いるコンクリートプレキャスト板を
図２に示す。該プレキャスト板１は、長さ及び巾が1.5
ｍで厚みが８cmの大きさであり、その中央部には内側に
すぼむ形状の円周内面を有する受け環１１を縦横の補強
筋１２に連結溶接して収容固定され、その円周内面を開
口させて取付孔１３が透設してある。また、上端は突段
部１７の形状として下端の突段部１５と係合できる形状
とし、中央上部にはモルタル注入孔１４が透設してあ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a reinforced soil surface constructed by the construction method of this example, and FIG. 2 shows a concrete precast plate used for the construction. The precast plate 1 has a length and a width of 1.5.
A receiving ring 11 having an inner circumferential surface that is recessed inward at the center thereof is connected and welded to longitudinal and lateral reinforcing bars 12 to be housed and fixed. And the mounting hole 13 is provided so as to be opened. Further, the upper end has a shape of a projecting portion 17 that can be engaged with the lower projecting portion 15, and a mortar injection hole 14 is provided in the center upper portion.
【０００９】本例工法は、まず、法面の上端から下に向
けて一段目のコンクリートプレキャスト板１を並列でき
る高さ分の約1.5ｍの装着面を掘削した段部２１を整形
確保する。ついで、図３のように、プレキャスト板１を
並列配置するための載置用係合レール３を装着面側の該
段部上に設置し、アンカーピン３１を打ち込んで載置用
係合レール３を水平に固定する。そして、該係合レール
３にプレキャスト板１の下端突段部１５を係合して並列
配置すると共に、プレキャスト板１の上端突段部１７に
天端用係合レール４を被着しアンカーピン４１を打ち込
んで天端用係合レール４を装着面側に固定することでプ
レキャスト板１を仮止め保持する。In the construction method of this example, first, the stepped portion 21 is excavated and secured by excavating the mounting surface of about 1.5 m, which is the height at which the first-stage concrete precast plate 1 can be juxtaposed downward from the upper end of the slope. Then, as shown in FIG. 3, a mounting engagement rail 3 for arranging the precast plates 1 in parallel is installed on the step portion on the mounting surface side, and an anchor pin 31 is driven in to mount the mounting engagement rail 3 thereon. Is fixed horizontally. Then, the lower end projecting portion 15 of the precast plate 1 is engaged with the engaging rail 3 and arranged in parallel, and the upper end projecting portion 17 of the precast plate 1 is covered with the upper end engaging rail 4 to attach the anchor pin. The precast plate 1 is temporarily fixed and held by driving in 41 to fix the top end engaging rail 4 to the mounting surface side.
【００１０】ついで図４のように、夫々の削孔機によっ
てプレキャスト板１に透設された取付孔１３から装着面
側に約５ｍ削孔し、取付孔１３から該削孔部１６に異形
鉄筋５を挿入した後、図５のように、取付孔１３から該
削孔部１６にモルタル６を注入すると共に、土面とプレ
キャスト板１の裏側間隙に注入孔１４からモルタル６を
注入しグラウトを施す。そのグラウト後、一日養生し、
図６のように、取付孔１３に突出している夫々の異形鉄
筋５のネジ端部５１に台形ナット７を螺着し受け環１１
に当接させる。これにより、異形鉄筋５が台形ナット７
を介してプレキャスト板１に一体連結し、モルタル６を
介してプレキャスト板１が法面に定着する。なお、取付
孔１３の前部空間部にはモルタルを注入する。Then, as shown in FIG. 4, about 5 m is drilled from the mounting holes 13 formed through the precast plate 1 to the mounting surface side by the respective drilling machines, and the deformed reinforcing bars are formed from the mounting holes 13 to the drilled portions 16. After inserting 5, the mortar 6 is injected into the drilled hole portion 16 from the mounting hole 13 and the mortar 6 is injected into the gap between the soil surface and the back side of the precast plate 1 from the injection hole 14 as shown in FIG. Give. After the grout, he cured for a day,
As shown in FIG. 6, the trapezoidal nut 7 is screwed onto the screw end portion 51 of each deformed rebar 5 protruding into the mounting hole 13 to receive the ring 11.
Abut. As a result, the deformed rebar 5 becomes trapezoidal nut 7
The precast plate 1 is integrally connected to the precast plate 1, and the precast plate 1 is fixed on the slope via the mortar 6. It should be noted that mortar is injected into the front space of the mounting hole 13.
【００１１】該モルタルの乾燥後、アンカーピン３１を
抜いて載置用係合レール３を外すと共に、アンカーピン
４１を抜いて天端用係合レール４を外す。ついで、同様
に、上から二段目にコンクリートプレキャスト板を据付
けできる高さの取付面を掘削した段部２２を形成し、図
７のように、該段部２２に載置用係合レール３をアンカ
ーピン３１で配置固定し、二段目のプレキャスト板１の
下端突段部１５を載置用係合レール３に係合載置すると
共に、夫々突段部１７とした上端部を一段目のプレキャ
スト板の下端突段部１５と合わせボルト１８で連結して
二段目のプレキャスト板１を仮止めする。なお、プレキ
ャスト板１の係合は、図８のように、突段部１５，１７
に夫々埋め込まれたプレート１９部でのネジ止めによっ
て固定するのである。After the mortar is dried, the anchor pin 31 is pulled out to remove the mounting engagement rail 3 and the anchor pin 41 is removed to remove the ceiling end engagement rail 4. Then, similarly, a step portion 22 is formed by excavating a mounting surface of a height at which the concrete precast plate can be installed in the second step from the top, and as shown in FIG. 7, the mounting engagement rail 3 is mounted on the step portion 22. Are fixed and fixed by anchor pins 31, the lower end protruding steps 15 of the second-stage precast plate 1 are engaged and mounted on the mounting engagement rails 3, and the upper ends of the protruding steps 17 are set to the first step. The precast plate 1 of the second stage is temporarily fixed by connecting it to the lower end protruding portion 15 of the precast plate of FIG. In addition, the engagement of the precast plate 1 is as shown in FIG.
It is fixed by screwing at the plate 19 portion embedded in each.
【００１２】そして、図９のように、二段目のプレキャ
スト板１に透設された取付孔１３から削孔して取付孔１
３から該削孔部１６に異形鉄筋５を挿入し、前記同様
に、該削孔部１６とプレキャスト板１の裏側間隙にモル
タル６を注入する。グラウト後、一日養生し、夫々の異
形鉄筋５のネジ端部５１に台形ナット７を螺着し受け環
１１に当接させプレキャスト板１に一体連結し、モルタ
ル６を介してプレキャスト板１が法面に定着する。Then, as shown in FIG. 9, the mounting hole 1 is formed by drilling from the mounting hole 13 formed through the second precast plate 1.
The deformed bar 5 is inserted into the drilled portion 16 from 3 and the mortar 6 is injected into the gap between the drilled portion 16 and the back side of the precast plate 1 in the same manner as described above. After grouting, curing for one day, trapezoidal nuts 7 are screwed to the screw ends 51 of each deformed bar 5 and brought into contact with the receiving ring 11 to be integrally connected to the precast plate 1, and the precast plate 1 is connected via the mortar 6. Settle on the slope.
【００１３】そしてまた、同様に、上から三段目にコン
クリートプレキャスト板を据付けできる高さの取付面を
掘削した段部を形成し、載置用係合レールの設置、三段
目のプレキャスト板の仮止め、削孔部の穿設、異形鉄筋
の挿入、該削孔部とプレキャスト板の裏側間隙にモルタ
ルを注入、養生後異形鉄筋の台形ナットによる連結、載
置用係合レールの除去の各工程を繰り返すことで、図１
のように、複数段にプレキャスト板１を備えた補強土面
を形成するのである。Similarly, a step portion is formed by excavating a mounting surface of a height at which the concrete precast plate can be installed in the third step from the top, installation of mounting rails for mounting, and precast plate in the third step. Temporary fixing, drilling a hole, inserting a deformed bar, injecting mortar into the gap between the hole and the back side of the precast plate, after curing, connecting the deformed bar with a trapezoidal nut, and removing the mounting engagement rail. By repeating each step,
As described above, the reinforced soil surface provided with the precast plates 1 in a plurality of stages is formed.
【００１４】本例工法によると、プレキャスト板１がそ
の上端突段部１７を天端用係合レール４或いは上のプレ
キャスト板１の下端突段部１５とボルト１８連結すると
共に、その下端突段部１５を載置用係合レール３に係合
して仮止めし、この状態でグラウト、及び装着面部へモ
ルタル注入することからプレキャスト板１が不動で安定
装着でき、しかも異形鉄筋５の端部で螺着した台形ナッ
ト７を受け環１１で受け止めるため異形鉄筋５がプレキ
ャスト板１に一体連結できて定着確保できるのである。
したがって、プレキャスト板１が剥離して落下すること
がないのである。According to the construction method of this embodiment, the precast plate 1 connects the upper end projecting portion 17 to the ceiling engaging rail 4 or the lower end projecting portion 15 of the upper precast plate 1 by the bolt 18, and the lower projecting portion thereof is connected. The part 15 is engaged with the mounting engagement rail 3 and temporarily fixed, and in this state, mortar is injected into the grout and the mounting surface part, so that the precast plate 1 can be stably and stably mounted, and the end portion of the deformed rebar 5 Since the trapezoidal nut 7 screwed in is received by the receiving ring 11, the deformed bar 5 can be integrally connected to the precast plate 1 to secure the fixing.
Therefore, the precast plate 1 does not peel off and fall.
【００１５】このように本例によると、上から順次、土
留と同時にプレキャスト板を据付けする工事であるため
占用用地幅を小さくできると共に、土工事量を少なくで
き、工期の短縮が図れるのである。また、法面がプレキ
ャスト板となるため外観が良好で、プレキャスト板の仕
上げ次第によって美観をさらに良好とすることができる
のである。As described above, according to this example, since the precast plate is installed simultaneously with the soil retention from the top, the space for exclusive use can be reduced, the amount of earthwork can be reduced, and the construction period can be shortened. Further, since the slope is a precast plate, the appearance is good, and the appearance can be further improved depending on the finish of the precast plate.
【００１６】また、本例のプレキャスト板１によると、
台形ナット７を受ける受け環１１を内蔵し、且つ補強筋
１２に固定してあるため、台形ナット７との係合を確保
できることから異形鉄筋５がプレキャスト板１に一体連
結できて定着を確保できるのである。According to the precast plate 1 of this example,
Since the receiving ring 11 that receives the trapezoidal nut 7 is built in and is fixed to the reinforcing bar 12, the engagement with the trapezoidal nut 7 can be ensured, so that the deformed bar 5 can be integrally connected to the precast plate 1 and the fixation can be secured. Of.
【００１７】本例工法は夫々前記のように構成したが、
本発明においてはこれに限定されない。例えば、形成し
ようとする補強土面の傾斜勾配は問わず、垂直勾配まで
適用できるのである。また、プレキャスト板を並列配置
するため載置用係合レール及び天端用係合レールを用い
る場合その形状、構成は適宜であり、プレキャスト板を
間隙をおいて止着できればよい。[0017] The present example construction method has been configured as each said,
The present invention is not limited to this. For example, a vertical gradient can be applied regardless of the gradient gradient of the reinforced soil surface to be formed. In addition, a mounting engagement rail and a top end engagement rail are used to arrange the precast plates in parallel.
Its shape when that configuration is appropriate, a precast plate
It suffices if it can be fixed with a gap .
【００１８】さらに、該削孔部に挿入する棒状補強材も
任意であり、該削孔部及びプレキャスト板の裏側間隙に
モルタルを注入する手段も問わない。なお、夫々補強材
の突出端部を取付孔部で固着してプレキャスト板に一体
連結する構成も適宜である。また、上下のプレキャスト
板の接合構成も限定されず、図１０或いは図１１のよう
に連結してもよい。さらに、各段のプレキャスト板の並
置も問わず、図１２のように、夫々側端の突段部を係合
させて並置する構成でもよい。Further, the rod-shaped reinforcing material to be inserted into the drilled portion is optional, and the means for injecting mortar into the gap between the drilled portion and the back side of the precast plate is not limited. It should be noted that a configuration in which the protruding ends of the reinforcing members are fixed to each other by the mounting holes and integrally connected to the precast plate is also appropriate. Further, the joining structure of the upper and lower precast plates is not limited, and the precast plates may be connected as shown in FIG. 10 or 11. Further, regardless of the juxtaposition of the precast plates in each step, as shown in FIG. 12, the protruding step parts at the respective side ends may be engaged and juxtaposed.
【００１９】また、コンクリートプレキャスト板におい
ては、補強材を挿通する取付孔の数及び位置は問わず、
プレキャスト板の大きさ及び形状も任意である。In the concrete precast board, the number and position of the mounting holes for inserting the reinforcing material are not limited .
The size and shape of the precast plate are also arbitrary.
【００２０】[0020]
【発明の効果】本発明によると、上から順次、土留と同
時にプレキャスト板を据付けする工事であるため占用用
地幅を小さくできると共に、土工事量を少なくでき、工
期の短縮が図れるのである。また、プレキャスト板の定
着が確保できるため信頼性を高くできて永久構造体にで
きること、及び法面がプレキャスト板となるため外観が
良好で、プレキャスト板の仕上げ次第によって美観をさ
らに良好とすることができる効果が大きい。また、請求
項２では、プレキャスト板の並列配置を確実にできるの
である。According to the present invention, since the precast plate is installed at the same time from the top as the soil is retained, the space for exclusive use can be reduced, the amount of earthwork can be reduced, and the construction period can be shortened. Further, since the fixing of the precast plate can be ensured, the reliability can be made high and a permanent structure can be obtained, and the appearance becomes good because the slope becomes the precast plate, and the aesthetic appearance can be further improved depending on the finish of the precast plate. It has a great effect. Further, according to the second aspect , it is possible to surely arrange the precast plates in parallel .
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明工法の一実施例による切土法面の縦断面
図である。FIG. 1 is a vertical cross-sectional view of a cut slope according to an embodiment of the method of the present invention.
【図２】コンクリートプレキャスト板の一実施例を示す
要部を切欠した斜視図である。FIG. 2 is a perspective view showing an example of a concrete precast plate with a main part cut away.
【図３】一段目を掘削して段部を確保し、載置用係合レ
ールを固定した状態の縦断面図である。FIG. 3 is a vertical cross-sectional view showing a state in which the step portion is secured by excavating the first step and the mounting engagement rail is fixed.
【図４】一段目のプレキャスト板を仮止めし、削孔した
状態の縦断面図である。FIG. 4 is a vertical cross-sectional view showing a state in which the first-stage precast plate is temporarily fixed and holes are drilled.
【図５】削孔部に異形鉄筋を挿入してグラウトし、プレ
キャスト板の裏面にモルタルを注入した状態の縦断面図
である。FIG. 5 is a vertical cross-sectional view showing a state in which a deformed bar is inserted into a drilled portion, grouted, and mortar is injected into the back surface of the precast plate.
【図６】プレキャスト板の取付孔で異形鉄筋を連結した
状態の拡大縦断面図である。FIG. 6 is an enlarged vertical sectional view showing a state in which deformed reinforcing bars are connected to each other through mounting holes of a precast plate.
【図７】二段目のプレキャスト板を仮止めした状態の縦
断面図である。FIG. 7 is a vertical cross-sectional view showing a state where the second-stage precast plate is temporarily fixed.
【図８】上下のプレキャスト板の接合部を示す拡大縦断
面図である。FIG. 8 is an enlarged vertical cross-sectional view showing a joint portion between upper and lower precast plates.
【図９】二段目の削孔部に異形鉄筋を挿入してグラウト
し、プレキャスト板の裏面にモルタルを注入した状態の
縦断面図である。FIG. 9 is a vertical cross-sectional view showing a state in which a deformed reinforcing bar is inserted into the second-stage drilled portion, grouting, and mortar is injected into the back surface of the precast plate.
【図１０】上下のプレキャスト板の接合部の別例を示す
拡大縦断面図である。FIG. 10 is an enlarged vertical cross-sectional view showing another example of the joint portion between the upper and lower precast plates.
【図１１】上下のプレキャスト板の接合部のさらに別例
を示す縦断面図である。FIG. 11 is a vertical cross-sectional view showing still another example of the joint portion between the upper and lower precast plates.
【図１２】横方向のプレキャスト板の接合部の別例を示
す横断面図である。FIG. 12 is a transverse cross-sectional view showing another example of the joining portion of the horizontal precast plate.
【符号の説明】 １ プレキャスト １１ 受け環 １２ 補強筋 １３ 取付孔 １４ モルタル注入孔 １５ 下端の突段部 １６ 削孔部 １７ 上端の突段部 １８ ボルト １９ プレート ２１，２２ 段部 ３ 載置用係合レール ３１ アンカーピン ４ 天端用係合レール ４１ アンカーピン ５ 異形鉄筋 ５１ ネジ端部 ６ モルタル ７ 台形ナット[Explanation of Codes] 1 Precast 11 Receiving ring 12 Reinforcing bar 13 Mounting hole 14 Mortar injection hole 15 Lower end projecting part 16 Drilling part 17 Upper projecting part 18 Bolt 19 Plate 21, 22 Step part 3 Mounting member Combined rail 31 Anchor pin 4 Engagement rail for top end 41 Anchor pin 5 Deformed bar 51 Screw end 6 Mortar 7 Trapezoid nut
Claims (2)
に向けて一段目のコンクリートプレキャスト板を据付け
できる高さの装着面を掘削した段部を確保し、プレキャ
スト板を並列配置するための載置用係合レールを装着面
側の該段部上に固定し、該係合レールにプレキャスト板
を係合して並列配置すると共に、プレキャスト板の上端
に天端用係合レールを被着して天端用係合レールを装着
面側に固定することでプレキャスト板を仮止めし、つい
で夫々のプレキャスト板に透設された取付孔から装着面
側に削孔して取付孔から該削孔部に鉄筋等の棒状補強材
を挿入した後、該削孔部及びプレキャスト板の裏側間隙
にモルタルを注入し、夫々補強材の突出端部を取付孔部
で固着してプレキャスト板に一体連結し、該モルタルの
乾燥後、上から二段目にコンクリートプレキャスト板を
据付けできる高さの取付面を掘削した段部を形成し、該
段部に載置用係合レールを配置固定して二段目のプレキ
ャスト板を係合載置すると共に、夫々一段目のプレキャ
スト板の載置用係合レールを外した下端部とその上端を
連結して二段目のプレキャスト板を仮止めし、二段目の
プレキャスト板に透設された取付孔から削孔して取付孔
から該削孔部に棒状補強材を挿入した後、該削孔部及び
二段目のプレキャスト板の裏側間隙にモルタルを注入
し、夫々補強材の突出端部を取付孔部に固着して二段目
のプレキャスト板に一体連結し、これを繰り返すことで
複数段にプレキャスト板を備えた補強土面を形成するこ
とを特徴とする切土法面等の補強土工法。1. A method for securing a step portion, in which a mounting surface is excavated from the upper end of a reinforced soil surface to be formed, to a position where the first-stage concrete precast plate can be installed, and precast plates are arranged in parallel The mounting engagement rail is fixed on the stepped portion on the mounting surface side, the precast plate is engaged with the engagement rail and arranged in parallel, and the top end engagement rail is attached to the upper end of the precast plate. Then, the precast plate is temporarily fixed by fixing the top end engaging rail to the mounting surface side, and then the mounting holes formed through the respective precast plates are drilled from the mounting holes to the mounting surface side. After inserting a rod-shaped reinforcing material such as a reinforcing bar into the hole, mortar is injected into the hole and the back side gap of the precast plate, and the protruding ends of the reinforcing material are fixed to the mounting holes and integrally connected to the precast plate. Then, after drying the mortar, the second step from the top A step portion is formed by excavating a mounting surface of a height at which a concrete precast plate can be installed in the eye, and a mounting engagement rail is arranged and fixed to the step portion, and the second stage precast plate is engaged and placed. , The lower end of the first-stage precast plate from which the mounting engagement rails have been removed is connected to the upper end of the precast plate to temporarily secure the second-stage precast plate, and a mounting hole transparently provided on the second-stage precast plate After inserting the rod-shaped reinforcing material from the mounting hole into the drilled hole, mortar is injected into the hole and the back side gap of the second-stage precast plate, and the protruding ends of the reinforcing material are attached respectively. Reinforced earthwork method such as cut slope, characterized in that it is fixed to the hole and integrally connected to the second-stage precast plate, and by repeating this, a reinforced soil surface with precast plates in multiple stages is formed. .
孔部に、内側にすぼむ形状の円周内面を有する受け環を
補強筋に連結させ内蔵固定して該円周内面を取付孔の一
部として成り、該受け環の円周内面で補強材のネジ部に
螺着したナットを受けることを特徴とする切土法面等の
補強土工法に用いるコンクリートプレキャスト板。2. A receiving ring having a circumferential inner surface that is recessed inward is connected to a reinforcing bar in a mounting hole portion through which the reinforcing material of the precast plate is inserted, and is internally fixed to fix the inner circumferential surface of the mounting hole. A concrete precast plate used for a reinforced earthwork method such as a cut slope, which is formed as a part and receives a nut screwed to a screw portion of a reinforcing material on an inner circumferential surface of the receiving ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23312292A JPH0726402B2 (en) | 1992-08-07 | 1992-08-07 | Reinforcement method such as cut slope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23312292A JPH0726402B2 (en) | 1992-08-07 | 1992-08-07 | Reinforcement method such as cut slope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0657756A true JPH0657756A (en) | 1994-03-01 |
| JPH0726402B2 JPH0726402B2 (en) | 1995-03-22 |
Family
ID=16950106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23312292A Expired - Lifetime JPH0726402B2 (en) | 1992-08-07 | 1992-08-07 | Reinforcement method such as cut slope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0726402B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012246706A (en) * | 2011-05-30 | 2012-12-13 | Yahagi Construction Co Ltd | Installation method for precast plate of first step in slope face reinforcing construction method |
| JP2021055519A (en) * | 2019-10-01 | 2021-04-08 | 株式会社エスイー | Slope face stabilization retaining wall and its construction method |
| JP7285385B1 (en) * | 2023-02-27 | 2023-06-01 | 株式会社エスイー | Support device for retaining wall panel in slope-stabilized retaining wall |
| JP7285386B1 (en) * | 2023-02-27 | 2023-06-01 | 株式会社エスイー | Support device for retaining wall panel in slope-stabilized retaining wall |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5290461B1 (en) * | 2012-12-04 | 2013-09-18 | 矢作建設工業株式会社 | Slope reinforcement method |
| JP5671090B2 (en) * | 2013-04-15 | 2015-02-18 | 矢作建設工業株式会社 | Slope reinforcement method |
-
1992
- 1992-08-07 JP JP23312292A patent/JPH0726402B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012246706A (en) * | 2011-05-30 | 2012-12-13 | Yahagi Construction Co Ltd | Installation method for precast plate of first step in slope face reinforcing construction method |
| JP2021055519A (en) * | 2019-10-01 | 2021-04-08 | 株式会社エスイー | Slope face stabilization retaining wall and its construction method |
| JP7285385B1 (en) * | 2023-02-27 | 2023-06-01 | 株式会社エスイー | Support device for retaining wall panel in slope-stabilized retaining wall |
| JP7285386B1 (en) * | 2023-02-27 | 2023-06-01 | 株式会社エスイー | Support device for retaining wall panel in slope-stabilized retaining wall |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0726402B2 (en) | 1995-03-22 |
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