JPH0528288B2 - - Google Patents
Info
- Publication number
- JPH0528288B2 JPH0528288B2 JP62245799A JP24579987A JPH0528288B2 JP H0528288 B2 JPH0528288 B2 JP H0528288B2 JP 62245799 A JP62245799 A JP 62245799A JP 24579987 A JP24579987 A JP 24579987A JP H0528288 B2 JPH0528288 B2 JP H0528288B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- cut
- reinforcing material
- slope
- reinforcement
- 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.)
- Expired - Lifetime
Links
- 239000012779 reinforcing material Substances 0.000 claims description 24
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、地盤の切取りにより生じた斜面地
山を、面状補強材を使用して補強する補強構造に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reinforcement structure for reinforcing a sloped ground created by cutting the ground using a planar reinforcing material.
従来、地盤の切取りにより生じた斜面地山の補
強構造としては、第１３図および第１４図に示す
ように、切取斜面２から地山奥部に向かつて延長
する多数のロツクボルト７を、上下および左右方
向に間隔をおいて挿入繋止した補強構造が知られ
ている。
Conventionally, as a reinforcement structure for a slope created by cutting the ground, as shown in Figs. Reinforcement structures are known that are inserted and locked at intervals in the direction.
しかるに前記従来の補強構造の場合は、ロツク
ボルト７を囲む破線円内部分８のみが地盤改良さ
れ、その地盤改良された部分の間に広い未改良部
分９が存在するので、この未改良部分が弱点とな
つて地山が崩落することが多い。
However, in the case of the conventional reinforced structure, only the area 8 inside the broken line circle surrounding the lock bolt 7 is ground improved, and a wide unimproved area 9 exists between the improved areas, so this unimproved area becomes the weak point. As a result, the ground often collapses.
また地山中には、断層、節理（割れ目）、不整
合面等の種々の地質不連続面が存在するが、この
地質不連続面を充分に補強することが困難であ
る。例えば第１５図および第１６図に示すよう
に、切取斜面地山１に地質不連続面１０が傾斜状
態で存在する場合、ロツクボルト７により地質不
連続面を補強しても、そのロツクボルト７による
補強は線結合であるので、補強効果が不充分であ
り、そのため前記地質不連続面１０の上部にある
上部塊１１が滑り移動することがある。 Furthermore, various geological discontinuities such as faults, joints (cracks), and unconformity surfaces exist in the ground, but it is difficult to sufficiently reinforce these geological discontinuities. For example, as shown in FIGS. 15 and 16, if a geologically discontinuous surface 10 exists in an inclined state on a cut-off slope ground 1, even if the geologically discontinuous surface is reinforced with lock bolts 7, the reinforcement by the lock bolts 7 Since this is a linear connection, the reinforcing effect is insufficient, and as a result, the upper mass 11 above the geological discontinuity surface 10 may slip and move.
また第１７図および第１８図に示すように、節
理性の地山にキーブロツク１２が存在する場合、
ロツクボルト７によりキーブロツク１２を地山に
繋止することが試みられているが、ロツクボルト
７による繋止力が不充分で、前記キーブロツク１
２が抜け落ちることが多い。 In addition, as shown in FIGS. 17 and 18, if the key block 12 exists in the geological formation of parity,
Attempts have been made to anchor the key block 12 to the ground using the lock bolt 7, but the locking force of the lock bolt 7 is insufficient, and the key block 1
2 is often left out.
この発明は前述の問題を有利に解決できめ面状
補強材による切取斜面地山の補強構造を提供する
ことを目的とするものであつて、この発明の要旨
とするところは、切取斜面地山１に、地質不連続
面１０に交差する溝３が、切取斜面２から地山に
向かつて掘削され、前記溝３内に面状補強材４が
挿入されると共に硬化性充填材５が充填され、前
記切取斜面２に表面補強材層６が設けられている
ことを特徴とする面状補強材による切取斜面地山
の補強構造にある。
The purpose of this invention is to advantageously solve the above-mentioned problems and provide a reinforcement structure for cut slope ground using a face-shaped reinforcing material. 1, a groove 3 intersecting the geological discontinuity surface 10 is excavated from the cut slope 2 toward the ground, and a planar reinforcing material 4 is inserted into the groove 3, and a hardening filler 5 is filled. , a reinforcing structure for a cut slope ground using a planar reinforcing material, characterized in that a surface reinforcing material layer 6 is provided on the cut slope 2.
次にこの発明を図示の例によつて詳細に説明す
る。
Next, the present invention will be explained in detail using illustrated examples.
第１図ないし第４図はこの発明の切取斜面地山
の補強構造を施工する順序の第１例を示すもので
あつて、まず第１図に示すように地盤を切取つて
切取斜面２を形成したのち、第２図に示すよう
に、溝３を切取斜面２から地山に向かつてほぼ水
平に掘削する。 Figures 1 to 4 show a first example of the order of constructing the reinforcing structure for cut-off slope ground according to the present invention. First, as shown in Figure 1, the ground is cut to form the cut-out slope 2. Thereafter, as shown in FIG. 2, a trench 3 is excavated almost horizontally from the cutting slope 2 toward the ground.
次いで第３図に示すように、溝３内に面状補強
材４を挿入したのちモルタルまたはコンクリート
等の硬化性充填材５を注入充填し、続いて第４図
に示すように、切取斜面２にコンクリートからな
る硬化性材料を吹き付けることにより表面補強材
層６を形成して、１箇所の補強施工を終了する。 Next, as shown in FIG. 3, after inserting a planar reinforcing material 4 into the groove 3, a hardening filler 5 such as mortar or concrete is injected and filled, and then, as shown in FIG. A surface reinforcing material layer 6 is formed by spraying a hardening material made of concrete onto the surface, and the reinforcement work at one location is completed.
次にこのような補強施工を反復して行なつて切
取斜面全体の地山を補強し、その地山を安定させ
る。 Next, such reinforcement work is repeated to reinforce the ground on the entire cut slope and stabilize the ground.
第５図ないし第８図はこの発明の切取斜面地山
の補強構造を施工する順序の第２例を示すもので
あつて、まず第５図に示すように、地盤を切取つ
て切取斜面２を形成したのち、第６図に示すよう
に、前記切取斜面２にコンクリートからなる硬化
性材料を吹付けて表面補強材層６を形成し、次い
で第７図に示すように溝３を表面補強材層６から
切取斜面地山１に向かつてほぼ水平に掘削する。 Figures 5 to 8 show a second example of the order of constructing the reinforcing structure for cut-off slope ground according to the present invention. First, as shown in Figure 5, the ground is cut and the cut-out slope 2 is constructed. After forming, as shown in FIG. 6, a hardening material made of concrete is sprayed onto the cut slope 2 to form a surface reinforcing material layer 6, and then, as shown in FIG. Excavation is carried out almost horizontally from layer 6 toward cut slope ground 1.
次に第８図に示すように、溝３内に、面状補強
材４を挿入したのちモルタルまたはコンクリート
等の硬化性充填材５を注入充填して、１箇所の補
強施工を終了する。 Next, as shown in FIG. 8, a planar reinforcing material 4 is inserted into the groove 3, and then a hardening filler 5 such as mortar or concrete is injected and filled to complete the reinforcement work at one location.
次にこのような補強施工を反復して行なつて切
取斜面全体の地山を補強しその地山を安定させ
る。 Next, such reinforcement work is repeated to reinforce and stabilize the ground on the entire cut slope.
前記面状補強材４を設置する場合、その面状補
強材４の巾や長さ等を任意に設定できる。 When installing the planar reinforcing material 4, the width, length, etc. of the planar reinforcing material 4 can be set arbitrarily.
第９図および第１０図は完成した第１実施例に
係る切取斜面地山の補強構造を示すものであつ
て、切取斜面地山１に断層、節理などの傾斜した
地質不連続面１０が存在し、面状補強材４をその
地質不連続面１０に交差するように設置して、地
質不連続面１０の上部にある上部塊１１の滑りを
防止している。 FIGS. 9 and 10 show the completed reinforced structure of the cut-off slope ground according to the first embodiment, in which the cut-out slope ground 1 has an inclined geological discontinuity surface 10 such as a fault or a joint. The planar reinforcing material 4 is installed to cross the geologically discontinuous surface 10 to prevent the upper mass 11 above the geologically discontinuous surface 10 from slipping.
また第１１図および第１２図に示す第２実施例
のように、切取斜面地山１にキーブロツク１２が
存在する場合は、面状補強材４をキーブロツク１
２とその周辺地山との地質不連続面１０に交差す
るように設置することにより、キーブロツク１２
の抜け落ちを防止することができる。 Further, as in the second embodiment shown in FIGS. 11 and 12, when a key block 12 is present in the cut slope ground 1, the planar reinforcing material 4 is attached to the key block 1.
By installing the key block 12 so as to cross the geological discontinuity surface 10 between the key block 12 and the surrounding ground.
can be prevented from falling off.
この発明を実施する場合、複数の補強部１４を
同時に施工してもよい。また面状補強材４に要求
される性状は、所要の引張強度を有すると共に引
張り変形が少なく、かつ材質の経日変化が少なく
軽量であることである。これらの要求を満足する
材料としては、ジオテキスタイル、鉄網、多孔鉄
板、多孔合板、網状鉄筋等を使用することができ
る。 When implementing this invention, a plurality of reinforcing portions 14 may be constructed at the same time. Further, the properties required of the planar reinforcing material 4 are that it has the required tensile strength, has little tensile deformation, and is lightweight with little change in material quality over time. As materials that satisfy these requirements, geotextiles, iron mesh, perforated iron plates, perforated plywood, reticulated reinforcing bars, etc. can be used.
布状で可撓性の大きい面状補強材を使用する場
合は、押込棒の先端部に取付けたフツクを面状補
強材の先端部に係合し、その押込棒により面状補
強材を溝内に挿入することにより、溝内への面状
補強材の挿入を容易に行なうことができる。 When using a cloth-like and highly flexible sheet reinforcing material, engage the hook attached to the tip of the push rod with the tip of the sheet reinforcing material, and use the push rod to push the sheet reinforcing material into the groove. By inserting the planar reinforcing material into the groove, the planar reinforcing material can be easily inserted into the groove.
溝３を掘削する手段としては、硬質の地質の場
合はウオータージエツト式掘削を使用することが
でき、また水に対して弱い地質の場合は、電動鋸
状の掘削機を使用することができる。 As a means of excavating trench 3, waterjet type excavation can be used in the case of hard geology, and an electric saw-like excavator can be used in the case of geology that is sensitive to water. .
またこの発明を従来のロツクボルトによる補強
と併用すれば、切取斜面地山の補強硬化を一層向
上させることができる。 Furthermore, if this invention is used in combination with conventional reinforcement using lock bolts, the reinforcement hardening of the cut slope ground can be further improved.
この発明によれば、切取斜面地山１に、地質不
連続面１０に交差する溝３が、切取斜面２から地
山に向かつて掘削され、前記溝３内に面状補強材
４が挿入されると共に硬化性充填材５が充填さ
れ、前記切取斜面２に表面補強材層６が設けられ
ているので、地質不連続面１０の両側の地山を強
固に接続して地山を安定させることができる効果
が得られる。
According to this invention, a groove 3 that intersects with the geological discontinuity surface 10 is excavated in the cut slope ground 1 from the cut slope 2 toward the ground, and the planar reinforcing material 4 is inserted into the groove 3. Since the surface reinforcing material layer 6 is provided on the cut slope 2, the ground on both sides of the geologically discontinuous surface 10 is firmly connected and the ground is stabilized. The effect that can be obtained is obtained.
第１図ないし第４図はこの発明の切取斜面地山
の補強構造を施工する順序の第１例を示す縦断側
面図、第５図ないし第８図はこの発明の切取斜面
地山の補強構造を施工する順序の第２例を示す縦
断側面図である。第９図はこの発明の第１実施例
に係る切取斜面地山の補強構造を示す縦断側面
図、第１０図は第９図のＢ−Ｂ線断面図、第１１
図はこの発明の第２実施例に係る切取斜面地山の
補強構造を示す縦断正面図、第１２図は第１１図
のＣ−Ｃ線断面図である。第１３図は従来のロツ
クボルトによる切取斜面地山の補強構造を示す縦
断側面図、第１４図は第１３図のＦ−Ｆ線断面
図、第１５図はロツクボルトにより補強された切
取斜面地山が傾斜した不連続面に沿つて滑り破壊
される状態を説明するための縦断正面図、第１６
図は第１５図のＧ−Ｇ線断面図、第１７図はロツ
クボルトにより補強された切取斜面地山における
キーブロツクの抜け落ちを説明するための縦断正
面図、第１８図は第１７図のＨ−Ｈ線断面図であ
る。
図において、１は切取斜面地山、２は切取斜
面、３は溝、４は面状補強材、５は硬化性充填
材、６は表面補強材層、１０は地質不連続面、１
１は上部塊、１２はキーブロツク、１４は補強部
である。
Figures 1 to 4 are longitudinal sectional side views showing a first example of the order of constructing the reinforcing structure for a cut slope ground according to the present invention, and Figures 5 to 8 are longitudinal side views showing the reinforcement structure for a cut slope ground according to the present invention. FIG. 3 is a vertical cross-sectional side view showing a second example of the order of construction. FIG. 9 is a longitudinal side view showing a reinforcement structure for a cut-off slope ground according to the first embodiment of the present invention, FIG. 10 is a sectional view taken along line B-B in FIG.
12 is a vertical sectional front view showing a reinforcing structure for a cut slope ground according to a second embodiment of the present invention, and FIG. 12 is a sectional view taken along the line C--C in FIG. 11. Fig. 13 is a vertical side view showing the reinforcement structure of the cut-off slope ground using conventional rock bolts, Fig. 14 is a sectional view taken along the line F-F in Fig. 13, and Fig. 15 shows the cut-off slope ground reinforced with lock bolts. Vertical front view, No. 16, for explaining the state of sliding failure along an inclined discontinuous surface.
The figure is a sectional view taken along the line G-G in Fig. 15, Fig. 17 is a longitudinal sectional front view for explaining the falling off of a key block on a cut-off slope ground reinforced with lock bolts, and Fig. 18 is a sectional view taken along H-H in Fig. 17. FIG. In the figure, 1 is the cut slope ground, 2 is the cut slope, 3 is the groove, 4 is the planar reinforcement, 5 is the hardening filler, 6 is the surface reinforcement layer, 10 is the geological discontinuity surface, 1
1 is an upper block, 12 is a key block, and 14 is a reinforcing portion.
Claims (1)
する溝３が、切取斜面２から地山に向かつて掘削
され、前記溝３内に面状補強材４が挿入されると
共に硬化性充填材５が充填され、前記切取斜面２
に表面補強材層６が設けられていることを特徴と
する面状補強材による切取斜面地山の補強構造。1 A groove 3 that intersects the geological discontinuity surface 10 is excavated in the cut slope ground 1 from the cut slope 2 toward the ground, and a planar reinforcing material 4 is inserted into the groove 3 and hardening filling is performed. material 5 is filled, and the cut slope 2
A reinforcing structure for a cut slope ground using a planar reinforcing material, characterized in that a surface reinforcing material layer 6 is provided on the surface of the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24579987A JPS6490320A (en) | 1987-10-01 | 1987-10-01 | Reinforcing structure for cut slope ground using face reinforcing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24579987A JPS6490320A (en) | 1987-10-01 | 1987-10-01 | Reinforcing structure for cut slope ground using face reinforcing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6490320A JPS6490320A (en) | 1989-04-06 |
| JPH0528288B2 true JPH0528288B2 (en) | 1993-04-23 |
Family
ID=17139007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24579987A Granted JPS6490320A (en) | 1987-10-01 | 1987-10-01 | Reinforcing structure for cut slope ground using face reinforcing material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6490320A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03202508A (en) * | 1988-01-26 | 1991-09-04 | Pub Works Res Inst Ministry Of Constr | Slope surface reinforcing earth construction using band-shaped stiffener |
| JPH02296929A (en) * | 1989-05-10 | 1990-12-07 | Fujita Corp | Method for reinforcing face of slope |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4899905A (en) * | 1972-04-01 | 1973-12-17 | ||
| JPS57187424A (en) * | 1981-05-15 | 1982-11-18 | Sumitomo Kensetsu Kk | Reinforcing work for cut slope |
-
1987
- 1987-10-01 JP JP24579987A patent/JPS6490320A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4899905A (en) * | 1972-04-01 | 1973-12-17 | ||
| JPS57187424A (en) * | 1981-05-15 | 1982-11-18 | Sumitomo Kensetsu Kk | Reinforcing work for cut slope |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6490320A (en) | 1989-04-06 |
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