JPH03191113A - Soil cement self-supporting landslide protection wall and execution method thereof - Google Patents
Soil cement self-supporting landslide protection wall and execution method thereofInfo
- Publication number
- JPH03191113A JPH03191113A JP32944689A JP32944689A JPH03191113A JP H03191113 A JPH03191113 A JP H03191113A JP 32944689 A JP32944689 A JP 32944689A JP 32944689 A JP32944689 A JP 32944689A JP H03191113 A JPH03191113 A JP H03191113A
- Authority
- JP
- Japan
- Prior art keywords
- soil cement
- reinforcing
- column
- reinforced
- reinforcing bar
- 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
- 239000004568 cement Substances 0.000 title claims abstract description 26
- 239000002689 soil Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 43
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 claims description 15
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 13
- 238000009412 basement excavation Methods 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000005452 bending Methods 0.000 abstract description 7
- 239000011162 core material Substances 0.000 description 21
- 230000002787 reinforcement Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、ソイルセメント自立山土め壁およびその施
工法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a soil cement self-supporting mountain earthen wall and its construction method.
（従来の技術）
従来、軟弱地盤の支持力を増加させるために地盤中にセ
メントミルク等の固結材を注入し、土砂とともに攪拌混
合し、いわゆるソイルセメント柱列を形成する工法が知
られている。柱列Ｒは、止水性もあり、低コストで施工
できることがら、山留等として利用されている。そして
ソイルセメント柱列には土圧が作用する水平力による曲
げモーメントに対して抵抗力を高めるために柱列内に補
強材として鉄筋を土圧が作用する引張側に挿入している
もの（特開昭６２−１７８６１９号公報）、また第７図
（ア）、（イ）に示すように柱列Ｒ内にＨ形鋼Ｋ又はシ
ートバイルＰを挿入しているものかある。(Prior art) Conventionally, in order to increase the bearing capacity of soft ground, a method of injecting cement milk or other solidifying material into the ground and stirring and mixing it with earth and sand to form so-called soil-cement columns has been known. There is. The row of columns R is used as a mountain retainer, etc. because it has water-stop properties and can be constructed at low cost. In order to increase the resistance to the bending moment caused by the horizontal force exerted by the soil cement column, reinforcing bars are inserted into the column column on the tensile side where the earth pressure acts (especially In addition, as shown in FIGS. 7(A) and 7(B), an H-beam K or a sheet vile P is inserted into the column R.
（発明が解決しようとする課題）
土圧が作用する引張側に鉄筋を挿入している従来の柱列
ては水平力による曲げモーメントに対して十分なもので
はなく、またＨ形鋼又はシートパイルで補強する柱列は
、補強効果が高められるとしても、鋼材などを用いるた
めに鉄筋に比較してコスト高となる欠点がある。(Problems to be Solved by the Invention) Conventional column rows in which reinforcing bars are inserted on the tension side where earth pressure acts are not sufficient to withstand the bending moment due to horizontal force, and H-section steel or sheet piles Column rows reinforced with steel have the disadvantage that, even if the reinforcing effect is enhanced, the cost is higher than that of reinforcing bars because they use steel materials.
この発明の目的は、曲げモーメントに対して十分な抵抗
力を備えており、低コストにより柱列を施工できるよう
にすることにある。An object of the present invention is to provide a column array that has sufficient resistance to bending moments and can be constructed at low cost.
（課題を解決するための手段）
この発明のソイルセメント自立山土め壁の特徴は、ソイ
ルセメント柱列内に土圧が作用する引張側とその反対の
圧縮側のそれぞれの位置に鉄筋心材を配筋し、掘削面に
ほぼ一致する位置の上記鉄筋心材部分を補強筋で補強し
であることにある。(Means for Solving the Problems) The feature of the soil cement self-supporting mountain earthen wall of the present invention is that reinforcing steel cores are installed at each position on the tension side where earth pressure acts within the soil cement columns and on the opposite compression side. Reinforcement is arranged, and the core portion of the reinforcing steel at a position that almost coincides with the excavation surface is reinforced with reinforcing bars.
鉄筋心材の下端の先端を上方に向けて屈曲してもよい。The tip of the lower end of the reinforcing steel core may be bent upward.
鉄筋心材や帯筋の建込みを容易にするためにこれらの鉄
筋を鉄筋かごに構成してもよい。In order to facilitate the erection of reinforcing steel cores and ties, these reinforcing bars may be constructed into reinforcing bar cages.
この発明の柱列の施工法の特徴は、軟弱地盤中に形成し
たソイルセメント柱列が固化する前に、柱列内に土圧が
作用する引張側とその反対の圧縮側のそれぞれの位置に
配筋された鉄筋心材と、掘削面にほぼ一致する位置の上
記鉄筋心材部分を補強する補強筋とを組合わせた鉄筋か
ごを建込むようにしたことにある。鉄筋かごの建込みを
容易にするために鉄筋かごの軸心部に予め鉄骨製建込み
治具を挿置しておき、鉄筋かご建込み時にこの建込み治
具によって鉄筋かごを固化する前の柱列内に建込み、建
込み後、この建込み治具のみを柱列から引抜くようにし
てもよい。The feature of the column construction method of this invention is that, before the soil cement column formed in soft ground solidifies, the soil cement column is formed at each position on the tensile side and the opposite compression side where earth pressure acts within the column. A reinforcing bar basket is constructed by combining arranged reinforcing bar cores and reinforcing bars for reinforcing the reinforcing bar core portions located at positions substantially coincident with the excavation surface. In order to facilitate the erection of the reinforcing bar cage, a steel erection jig is inserted in advance at the center of the reinforcing bar cage. It is also possible to erect within the column row, and after erection, only this erection jig is pulled out from the column row.
（作用）
引張側と圧縮側の鉄筋心材は、鉄筋心材とセメントの定
着力が確保されると共に水平の土圧力に抵抗する。帯筋
は掘削面にほぼ一致する位置で鉄筋心材を補強している
ので、曲げモーメントに対向する圧縮力の強化に寄与す
る。(Function) The reinforcing steel cores on the tension side and the compression side ensure the fixing force of the reinforcing steel core and cement, and resist horizontal soil pressure. Since the tie bars reinforce the reinforcing steel core at a position that almost coincides with the excavation surface, they contribute to strengthening the compressive force that opposes the bending moment.
（実施例）
以下この発明の実施例を第１図〜第６図を参照して説明
する。(Example) Examples of the present invention will be described below with reference to FIGS. 1 to 6.
第１図及び第２図示すようにソイルセメント柱列１内に
は軸心方向に挿入している補強筋としての鉄筋心材２と
鉄筋心材３とを中心線りを挾んで両側すなわち、矢印方
向の土圧が作用する引張側（第１図右側）とその反対の
圧縮側（同図左側）のそれぞれの位置に配筋しである。As shown in Figures 1 and 2, reinforcing bar cores 2 and 3 as reinforcing bars are inserted in the soil cement column row 1 in the axial direction, on both sides of the center line, that is, in the direction of the arrow. Reinforcement is placed on the tension side (right side in Figure 1) where the earth pressure acts, and on the compression side (left side in Figure 1), which is the opposite.
各鉄筋心材２゜３の下端部２ａ、３ａは、水平の土圧に
よる引張への抵抗力を向上させるため、先端を上方に向
けて屈曲させている。また鉄筋心材２と鉄筋心材３とは
、掘削面Ｅにほぼ一致する位置の上記鉄筋心材部分を補
強筋である帯筋４を細いピッチをもって所定長さ掛は回
すことにより補強されている。The lower end portions 2a, 3a of each reinforcing bar core 2.degree. 3 have their tips bent upward in order to improve resistance to tension caused by horizontal earth pressure. Further, the reinforcing bar core 2 and the reinforcing bar core 3 are reinforced by turning the reinforcing bar 4, which is a reinforcing bar, for a predetermined length at a narrow pitch in the above-mentioned reinforcing bar core at a position that substantially coincides with the excavation surface E.
鉄筋心材２，３と帯筋４とは、第３図及び第４図に示す
ように鉄筋かご６を構成し、また鉄筋心材２．３を連結
筋５で連結している。鉄筋かご６の軸心部には、柱列１
を施工するために用いる建込み治具７を挿置しである。The reinforcing bar cores 2 and 3 and the tie bars 4 constitute a reinforcing bar cage 6, as shown in FIGS. 3 and 4, and the reinforcing bar cores 2.3 are connected by connecting bars 5. At the axial center of the reinforcing bar cage 6, there is a column row 1.
The construction jig 7 used for construction is inserted.
建込み治具７は、Ｈ形鋼７ａとその下端部に固着された
筒状台部７ｂとからなり、台部は各鉄筋心材２，３の下
端部２ａ、３ａ上に載せてあり、上部をワイヤ８により
鉄筋かご６支持している。The erection jig 7 consists of an H-beam 7a and a cylindrical stand 7b fixed to its lower end.The stand is placed on the lower ends 2a, 3a of each reinforcing bar core 2,3, is supported by the reinforcing bar cage 6 by wires 8.
次に、柱列１の施工法を第５図を参照して説明する。Next, the method of constructing the column row 1 will be explained with reference to FIG.
第５図（ア）に示すように軟弱地盤中に形成したソイル
セメント柱列１が固化する前に、柱列内に鉄筋かご６を
挿入する。As shown in FIG. 5(A), before the soil cement column row 1 formed in the soft ground hardens, a reinforcing bar cage 6 is inserted into the column row.
鉄筋かご６は予め建込み治具７の上部にワイヤ８により
連結されているために、建込み治具とは一体化されてお
り、振動機９の振動を建込み治具を通じて鉄筋かごに与
えながら所定深度まで建込む。Since the reinforcing bar cage 6 is connected in advance to the upper part of the erection jig 7 by a wire 8, it is integrated with the erection jig, and the vibration of the vibrator 9 is applied to the reinforcing bar cage through the erection jig. While doing so, it is built to a specified depth.
鉄筋かご６が第５図（イ）に示す位置に達したとき、鉄
筋かごの挿入を停止して、ワイヤ８を外し、鉄筋かごと
建込み治具７との結合を解く。When the rebar cage 6 reaches the position shown in FIG. 5(a), the insertion of the rebar cage is stopped, the wires 8 are removed, and the connection between the rebar cage and the erection jig 7 is released.
その後、第５図（つ）に示すように振動機９により振動
を建込み治具７に与えながら、建込み治具のみを柱列１
から上方へ引き抜く。Thereafter, as shown in FIG.
Pull it upwards.
柱列１の施工に先立って行う鉄筋かご６と建込み治具７
との一体化作業を第６図を参照して説明する。Reinforcement cage 6 and construction jig 7 performed prior to construction of column row 1
The integration work will be explained with reference to FIG.
第６図（ア）に示すように治具セット用ケーシング１０
を施工現場の地中に設置しておき、同図（イ）に示すよ
うに鉄筋かご６をクレーンにより吊って、このケーシン
グ内に挿入する。最後に同図（つ）に示すように建込み
治具７を鉄筋かご６内に挿入して、両者をワイヤ８によ
り連結して振動機９の下端部で建込み治具７をチャック
して、鉄筋かごと６と建込み治具とを一体化する。As shown in Figure 6 (A), the jig set casing 10
is installed underground at the construction site, and the reinforcing bar cage 6 is lifted by a crane and inserted into this casing, as shown in FIG. Finally, as shown in FIG. , the reinforcing bar cage 6 and the erection jig are integrated.
軟弱地盤中にソイルセメント柱列１を施工する装置とし
て、特公昭５８−２９３７４号及び同５８−２９３７５
号に係る混合攪拌装置を使用すれば、掘進が円滑に行え
、切削土とてん充材との攪拌効率が向上し、能率良くか
つ品質の良い柱列を施工できる。Japanese Patent Publication No. 58-29374 and No. 58-29375 as a device for constructing soil cement columns 1 in soft ground.
By using the mixing and agitating device according to the above issue, excavation can be carried out smoothly, the efficiency of agitating the cut soil and filler material can be improved, and column rows can be constructed efficiently and with good quality.
（発明の効果）
この発明によれば、ソイルセメント柱列内には引張側と
圧縮側とに鉄筋心材をそれぞれ配筋し、さらに帯筋を配
筋しであるのでセメントとの定着力が増し、曲げモーメ
ントに対して十分な抵抗力を得ることでき、しかも低コ
ストで柱列を施工できる。そして鉄筋心材の下端部を屈
曲させることにより、引張への抵抗力を向上させること
できる。(Effects of the Invention) According to the present invention, reinforcing steel cores are arranged on the tension side and compression side in the soil cement columns, and tie bars are further arranged, so that the fixing force with the cement is increased. , it is possible to obtain sufficient resistance against bending moments, and the column array can be constructed at low cost. By bending the lower end of the reinforcing steel core, the tensile resistance can be improved.
鉄筋かごを使用することにより施工がしやすくなる。ま
た鉄筋かごの建込みの際に、建込み治具を使用すれば、
より迅速に建込みができる。The use of rebar cages makes construction easier. Also, if you use a construction jig when erecting a rebar cage,
Construction can be done more quickly.
第１図〜第６図はこの発明に係り、第１図は施工状態を
示す断面図、第２図はソイルセメント柱列の斜視図、第
３図は建込み治具と鉄筋かごとの一部を示す拡大断面図
、第４図は第３図ＩＶ−ＩＶ線断面図、第５図は柱列の
施工工程を段階的に示す断面図、第６図は建込み治具と
鉄筋かごとを組合わせるための作業工程を段階的に示す
断面図、第７図は従来の柱列の平面図である。
１・・・ソイルセメント柱列、２．３・・・鉄筋心材、
２ａ、３ａ・・・鉄筋心材の下端部、
４・・・補強筋（帯筋）、 ６・・・鉄筋かご、７・
・・建込み治具、
Ｅ・・・掘削面。
以 上
株式会社長谷工
コーポレーション
テ ノ ッ り ス
株 式 会 社
住友セメント
株 式 会 社
（ア）
第５図
（つ）
第
図
第７図Figures 1 to 6 relate to this invention, with Figure 1 being a cross-sectional view showing the construction state, Figure 2 being a perspective view of a row of soil cement columns, and Figure 3 being a diagram of a construction jig and reinforcing cage. Figure 4 is a cross-sectional view taken along the line IV-IV in Figure 3. Figure 5 is a cross-sectional view showing the construction process of the column row step by step. Figure 6 is a construction jig and reinforcing cage. FIG. 7 is a cross-sectional view showing step-by-step the work process for combining the two, and FIG. 7 is a plan view of a conventional column row. 1... Soil cement column row, 2.3... Rebar core material,
2a, 3a... Lower end of reinforcing bar core, 4... Reinforcement bar (tie bar), 6... Rebar cage, 7...
...Erection jig, E...excavation surface. Haseko Corporation Technology Co., Ltd. Sumitomo Cement Co., Ltd. (A) Figure 5 (T) Figure 7
Claims (1)
の反対の圧縮側のそれぞれの位置に鉄筋心材を配筋し、
掘削面にほぼ一致する位置の上記鉄筋心材部分を補強筋
で補強してあることを特徴とするソイルセメント自立山
止め壁。 ２、鉄筋心材の下端はその先端を上方に向けて屈曲して
あることを特徴とする請求項１記載のソイルセメント自
立山止め壁。 ３、軟弱地盤中に形成したソイルセメント柱列が固化す
る前に、柱列内に土圧が作用する引張側とその反対の圧
縮側のそれぞれの位置に配筋された鉄筋心材と、掘削面
にほぼ一致する位置の上記鉄筋心材部分を補強する補強
筋とを組合わせた鉄筋かごを建込むことを特徴とするソ
イルセメント自立山止め壁の施工法。 ４、鉄筋かごの軸心部に予め鉄骨製建込み治具を挿置し
ておき、鉄筋かご建込み時にこの建込み治具によって鉄
筋かごを建込み、建込み後、この建込み治具のみを柱列
から引抜くことを特徴とする請求項３記載のソイルセメ
ント自立山止め壁の施工法。[Claims] 1. Reinforcing steel cores are arranged at each position on the tension side where earth pressure acts within the soil cement column and on the opposite compression side,
A soil cement self-supporting pile retaining wall characterized in that the above-mentioned reinforcing steel core portion at a position that substantially coincides with the excavation surface is reinforced with reinforcing bars. 2. The soil cement free-standing retaining wall according to claim 1, wherein the lower end of the reinforcing steel core is bent with its tip directed upward. 3. Before the soil cement columns formed in soft ground solidify, reinforcing steel cores are placed on the tension side where soil pressure acts within the column and on the opposite compression side, and on the excavation surface. A construction method for a soil cement self-supporting mountain retaining wall, which is characterized by erecting a reinforcing bar cage in combination with reinforcing bars that reinforce the above-mentioned reinforcing bar core portion at a position that substantially coincides with . 4. Insert a steel erection jig in advance into the axial center of the reinforcing bar cage, use this erection jig to erect the reinforcing bar cage, and then use this erection jig only after erection. 4. The method for constructing a soil cement self-supporting retaining wall according to claim 3, wherein the soil cement self-supporting retaining wall is pulled out from the column row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32944689A JP2792968B2 (en) | 1989-12-21 | 1989-12-21 | Self-supporting soil cement retaining wall and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32944689A JP2792968B2 (en) | 1989-12-21 | 1989-12-21 | Self-supporting soil cement retaining wall and its construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03191113A true JPH03191113A (en) | 1991-08-21 |
| JP2792968B2 JP2792968B2 (en) | 1998-09-03 |
Family
ID=18221467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32944689A Expired - Fee Related JP2792968B2 (en) | 1989-12-21 | 1989-12-21 | Self-supporting soil cement retaining wall and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2792968B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017180047A (en) * | 2016-03-31 | 2017-10-05 | Ｊｆｅスチール株式会社 | Reinforcement structure and reinforcement method for existing steel pile wall |
| JP2019163687A (en) * | 2019-05-16 | 2019-09-26 | Ｊｆｅスチール株式会社 | Reinforcing structure for existing steel sheet pile wall |
-
1989
- 1989-12-21 JP JP32944689A patent/JP2792968B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017180047A (en) * | 2016-03-31 | 2017-10-05 | Ｊｆｅスチール株式会社 | Reinforcement structure and reinforcement method for existing steel pile wall |
| JP2019163687A (en) * | 2019-05-16 | 2019-09-26 | Ｊｆｅスチール株式会社 | Reinforcing structure for existing steel sheet pile wall |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2792968B2 (en) | 1998-09-03 |
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