JPH10338929A - Lightweight-soil earth work - Google Patents
Lightweight-soil earth workInfo
- Publication number
- JPH10338929A JPH10338929A JP14833097A JP14833097A JPH10338929A JP H10338929 A JPH10338929 A JP H10338929A JP 14833097 A JP14833097 A JP 14833097A JP 14833097 A JP14833097 A JP 14833097A JP H10338929 A JPH10338929 A JP H10338929A
- Authority
- JP
- Japan
- Prior art keywords
- lightweight
- aggregate
- embankment
- ground
- wet
- 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
- 239000002689 soil Substances 0.000 title description 4
- 239000008187 granular material Substances 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 23
- 238000011049 filling Methods 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 19
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000011800 void material Substances 0.000 abstract description 4
- 230000000717 retained effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000010276 construction Methods 0.000 description 9
- 238000005056 compaction Methods 0.000 description 8
- 230000035699 permeability Effects 0.000 description 7
- 239000011324 bead Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229920006328 Styrofoam Polymers 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000011041 water permeability test Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、軽量土工法に関
し、特に、盛土，基礎地盤の構築，地盤の空隙部の充填
などの土木・建築工事を行なうさいの基礎地盤工事に適
した軽量土工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight earthwork method, and more particularly, to a lightweight earthwork method suitable for foundation ground work in civil engineering and construction work such as embankment, construction of a foundation ground, and filling of voids in the ground. About.
【０００２】[0002]
【従来の技術】上記基礎地盤工事は、従来、安全性およ
び経済性を考慮して、例えば、軟弱地盤に盛土する場合
には盛土の荷重による地面沈下を抑制するため、あるい
は擁壁内に盛土する場合には盛土による擁壁への側圧を
軽減するために、軽量かつ廉価な材料を用いた盛土材お
よびそれを使用した工法が広く知られている。2. Description of the Related Art Conventionally, the above-mentioned foundation ground work is conventionally performed in consideration of safety and economy, for example, when embankment is made on soft ground, in order to suppress ground subsidence due to the load of the embankment, or when embankment is embedded in a retaining wall. In order to reduce the lateral pressure on the retaining wall due to the embankment, embankment materials using lightweight and inexpensive materials and construction methods using the same are widely known.
【０００３】具体的には、(イ) 発砲スチロ−ルブロッ
クを積み重ね、表土で覆う工法、(ロ) 残土，ヘドロな
どにセメント、水を混合した泥漿物に、軽量化するため
に気泡、発砲スチロ−ルビ−ズなどを混入させた後、盛
土し固化させる工法、(ハ) 低かさ密度の材料(軽量骨
材，スラグ，シラスなど)を盛土材として、単に盛土す
る工法、などが挙げられる。[0003] Specifically, (a) a method of stacking styrofoam blocks and covering them with topsoil; (b) a method of mixing cement and water with remaining soil and sludge, and air bubbles and foaming to reduce the weight. Embedding and solidification after mixing styrene beads, etc. (c) Embankment method using low bulk density materials (lightweight aggregate, slag, shirasu, etc.) as embankment material .
【０００４】しかしながら、上記従来工法の(イ)は、有
機系材料を素材とした盛土材を用いて施工しているた
め、軽量であり側圧も生じないなどの利点がある反面、
地下水位が上昇したとき盛土材全体に浮力が生じ地盤面
を押し上げ、建造物にひずみを生じさせる欠点がある。
(ロ)は、気泡などの混入量によって盛土の密度をコント
ロ−ルでき、いかなる地盤の条件にも対応可能である
が、密度差の大きい材料を組合せた混合物であるため
に、施工した盛土の上・下層に密度差が生じ、特に下層
は高密度となり易く透水性を悪くするなど施工方法に難
点がある。(ハ)は、施工が容易であり、透水性も良好で
あり、最も経済的ではあるが、盛土は粒状物を単に盛土
しただけで盛土全体が一体化していないから、流動化し
易く、地震が発生した場合や上載荷重が不均衡な場合に
は、盛土が変形して上載物に損壊や亀裂が発生するなど
の問題がある。[0004] However, the method (a) of the above-mentioned conventional method has advantages such as light weight and no lateral pressure because it is constructed using an embankment material made of an organic material.
When the groundwater level rises, there is a drawback that buoyancy is generated in the entire embankment material and pushes up the ground surface, causing distortion in the building.
(B) can control the density of the embankment by mixing the amount of air bubbles etc., and can respond to any ground conditions.However, since it is a mixture of materials with a large density difference, the embankment There is a difference in density between the upper layer and the lower layer, and the lower layer has a difficulty in the construction method, such as high density and poor water permeability. (C) is easy to construct, has good water permeability, and is the most economical.However, embankment is easy to fluidize because the embankment is merely integrated with granular material and the whole embankment is not integrated. When it occurs or when the overlaid load is unbalanced, there is a problem that the embankment is deformed and the overlying object is damaged or cracked.
【０００５】最近、軟弱地盤に構築可能な無機系の素材
および接着剤を用いた透水性軽量ブロックが提案され
た。特開平7−300938号公報には、粒径0.1〜10.0ｍｍの
無機発泡ビ−ズ類(例、硝子発泡ビ−ズ)に対しセメント
系接着剤を40〜50ｗｔ％掻き混ぜ、型わくに押し込んで
硬化させることにより、上記発泡ビ−ズ類が部分接着し
た透水性軽量ブロックの製造(同公報の実施例２および
４参照)、および当該ブロックを用いて地盤の空隙部に
充填することができる旨、記載されている。[0005] Recently, a water-permeable lightweight block using an inorganic material and an adhesive that can be constructed on soft ground has been proposed. Japanese Patent Application Laid-Open No. 7-300938 discloses that a cement-based adhesive is stirred into inorganic foam beads (eg, glass foam beads) having a particle size of 0.1 to 10.0 mm (eg, glass foam beads) in an amount of 40 to 50 wt%, and is pressed into a mold. To produce a water-permeable lightweight block in which the foam beads are partially adhered (see Examples 2 and 4 of the publication), and use the block to fill the voids in the ground. To the effect.
【０００６】[0006]
【発明が解決しようとする課題】前掲の特開平7−30093
8号公報の透水性軽量ブロックは、密度が0.5〜0.55ｇ／
ｃｍ3、圧縮強度が10〜15ｋｇｆ／ｃｍ2および空隙率が
45〜50％であり、多少の降水ならば透水する利点があ
る。しかし、当該軽量ブロックを軟弱地盤に盛土した場
合、降水量の多い雨期・台風時では、十分に透水できな
いために、構築した軽量ブロック間の空隙に雨水が集積
する。そのため、軽量ブロックは、その密度が水より小
さいために浮力が生じる。その浮力を押さえるための被
覆層(同公報の図２〜４の符号２参照)、つまり荷重が必
要であると言う欠点を有していた。Problems to be Solved by the Invention Japanese Patent Laid-Open No. 7-30093
No. 8 has a density of 0.5 to 0.55 g /
cm 3 , compressive strength 10-15 kgf / cm 2 and porosity
It is 45-50% and has the advantage of permeating if there is some precipitation. However, when the lightweight blocks are embanked on soft ground, rainwater accumulates in the gaps between the constructed lightweight blocks because they cannot penetrate sufficiently during the rainy season or typhoon when the amount of precipitation is large. Therefore, the lightweight block has buoyancy because its density is smaller than that of water. The coating layer for suppressing the buoyancy (see reference numeral 2 in FIGS. 2 to 4 of the publication), that is, has a defect that a load is required.
【０００７】本発明は、上記問題点・欠点を解消すべく
なされたものであって、その目的は、多雨時にあっても
十分に透水し、荷重の不必要な湿潤密度(1ｇ／ｃｍ3以
上)を具備し、変形量が小さく、かつ適度の一軸圧縮強
さ(1.0Ｎ／ｍｍ2以上)を発現することのできる軽量土工
法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and drawbacks, and an object of the present invention is to provide a wet density (1 g / cm 3 or more) that allows sufficient water permeability even in heavy rain and does not require a load. It is an object of the present invention to provide a lightweight earthwork method having a small amount of deformation and capable of exhibiting an appropriate uniaxial compressive strength (1.0 N / mm 2 or more).
【０００８】[0008]
【課題を解決するための手段】本発明は、比較的少量の
水硬性粉体を付着させた湿潤軽量骨材からなる粒状体
を、盛土し、基礎地盤に構築し、または、地盤の空隙部
に充填して、固化・一体化させることを特徴とし、これ
によって、前記目的とする軽量土工法を提供するもので
ある。SUMMARY OF THE INVENTION The present invention provides a method for embedding a granular material made of wet lightweight aggregate to which a relatively small amount of hydraulic powder is adhered, constructing it on a foundation ground, or forming a void in the ground. And solidified and integrated, thereby providing the above-described lightweight earthwork method.
【０００９】すなわち、本発明は、「湿潤状態の軽量骨
材に水硬性粉体を混合し付着させた粒状体を、盛土に、
基礎地盤の構築に、および／または、地盤の空隙部の充
填に、使用して固化させることを特徴とする軽量土工
法。」(請求項１)を要旨とするものである。[0009] That is, the present invention provides a method in which "a granular material obtained by mixing and attaching a hydraulic powder to a wet lightweight aggregate is applied to an embankment,
A lightweight earth construction method characterized by being used for construction of a foundation ground and / or filling of voids in the ground and solidifying. (Claim 1).
【００１０】また、本発明は、 ・前記粒状体が、湿潤状態の軽量骨材1ｍ3(かさ容積)に
対して水硬性粉体を10〜150ｋｇ混合し付着させたもの
であること(請求項２)、 ・前記粒状体を締固めながら、盛土に、基礎地盤の構築
に、および／または、地盤の空隙部の充填に、使用する
こと(請求項３)、 ・前記軽量骨材が軽量細骨材および軽量粗骨材からな
り、かつ、 それらの割合が1：9〜5：5(重量比)である
こと(請求項４)、 ・前記軽量骨材の湿潤密度が1ｇ／ｃｍ3以上であること
(請求項５)、を特徴とするものである。Further, the present invention is, the particulate body, it is obtained by mixing 10~150kg adhere hydraulic powder relative lightweight aggregate 1 m 3 of wet (bulk volume) (claim (2), while compacting the granular material, using it for embankment, for constructing a foundation ground, and / or for filling voids in the ground (claim 3); It is composed of aggregate and lightweight coarse aggregate, and their ratio is 1: 9 to 5: 5 (weight ratio) (Claim 4).-The wet density of the lightweight aggregate is 1 g / cm 3 or more. Being
(Claim 5).
【００１１】[0011]
【発明の実施の形態】以下、本発明を詳細に説明する。
本発明で使用される軽量骨材は、軽量細骨材と軽量粗骨
材とを併用するのが好ましく、その比率は、軽量細骨
材：軽量粗骨材が概ね1：9〜5：5(重量比)の範囲であ
る。特に、好ましい範囲は2：8〜3：7(重量比)である。
軽量細骨材が過少になると、構築物(固化体)の一軸圧縮
応力に対する変形量が大きくなり、盛土や基礎地盤上に
建造した構造物にひずみが生じる場合もあるので好まし
くない。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The lightweight aggregate used in the present invention is preferably a combination of lightweight fine aggregate and lightweight coarse aggregate, and the ratio is such that lightweight fine aggregate: lightweight coarse aggregate is approximately 1: 9 to 5: 5. (Weight ratio). Particularly, a preferable range is from 2: 8 to 3: 7 (weight ratio).
If the amount of the lightweight fine aggregate is too small, the amount of deformation of the structure (solidified body) with respect to the uniaxial compressive stress increases, which may undesirably cause distortion in the embankment or the structure built on the foundation ground.
【００１２】また、軽量骨材は、湿潤密度が軽量細骨材
1.1ｇ／ｃｍ3以上、軽量粗骨材0.8ｇ／ｃｍ3以上のもの
が使用できるが、重要なのは、両者を混合したときの混
合物の湿潤密度が１ｇ／ｃｍ3以上でなければならな
い。Further, the lightweight aggregate has a wet density of a lightweight fine aggregate.
Although those having 1.1 g / cm 3 or more and lightweight coarse aggregate of 0.8 g / cm 3 or more can be used, what is important is that the wet density of the mixture when both are mixed must be 1 g / cm 3 or more.
【００１３】本発明において、前記した軽量骨材として
は、表面水率が3〜15重量％の湿潤状態で使用するのが
好ましい 。使用する軽量骨材の含水状態が表面乾燥飽
水状態未満では、骨材内部に水が含まれていても、水硬
性粉体が付着しにくく、また、その付着量も少なくな
り、構築後における圧縮応力に対する変形量が大きくな
り、前記したように、盛土や基礎地盤上に建造した構造
物にひずみが生じる場合もあるので好ましくない。In the present invention, the lightweight aggregate is preferably used in a wet state having a surface water content of 3 to 15% by weight. If the water-containing state of the lightweight aggregate used is less than the surface dry saturated state, even if water is contained inside the aggregate, the hydraulic powder hardly adheres, and the amount of adhesion becomes small, and after the construction, As described above, the amount of deformation with respect to the compressive stress increases, and as described above, the structure built on the embankment or the foundation ground may be undesirably strained.
【００１４】次に、本発明で使用する水硬性粉体につい
て説明する。水硬性粉体は、表面が湿潤状態にある軽量
骨材と混合し、付着させる。混合することによって、上
記水硬性粉体は軽量骨材の表面水と混ざり、ペ−ストと
なる。そのペ−スト量は、軽量骨材と軽量骨材との接点
を接着させ、硬化後における構築物の変形量を小さく
し、かつ十分な一軸圧縮強さ(1.0Ｎ／ｍｍ2以上)を発現
させる量であれば足りる。したがって、当該ペ−スト量
は、軽量骨材の全表面を覆うに足る量である必要は必ず
しもない。Next, the hydraulic powder used in the present invention will be described. The hydraulic powder is mixed with and adhered to the lightweight aggregate whose surface is wet. By mixing, the hydraulic powder mixes with the surface water of the lightweight aggregate to form a paste. The amount of the paste is such that the contact between the lightweight aggregate and the lightweight aggregate is adhered, the amount of deformation of the structure after curing is reduced, and sufficient uniaxial compressive strength (1.0 N / mm 2 or more) is developed. The quantity is enough. Therefore, the amount of paste need not necessarily be sufficient to cover the entire surface of the lightweight aggregate.
【００１５】水硬性粉体の混合割合は、湿潤状態の軽量
骨材1ｍ3（かさ容積）に対して10〜150ｋｇが好まし
く、特に30〜70ｋｇが好ましい。混合割合が10ｋｇ未満
の場合、前記ペ−スト量が不足して軽量骨材間の接点の
接着が不十分になり、変形量が大きくなると共に一軸圧
縮強さも低下し、また、150ｋｇを超える場合、一軸圧
縮強さは大きくなる反面、構築物の湿潤密度が大きくな
って雨水の流路を塞ぎ、排水が不十分になり、いずれの
場合も好ましくない。The mixing ratio of the hydraulic powder is preferably from 10 to 150 kg, more preferably from 30 to 70 kg, per 1 m 3 (bulk volume) of the wet lightweight aggregate. When the mixing ratio is less than 10 kg, the amount of the paste is insufficient, the adhesion of the contacts between the lightweight aggregates is insufficient, the deformation is increased, and the uniaxial compressive strength is reduced. On the other hand, while the uniaxial compressive strength increases, the wet density of the structure increases, blocking the flow path of rainwater and insufficient drainage, which is not preferable in any case.
【００１６】使用する水硬性粉体は、目的とする一軸圧
縮強さを発現する水硬性を有する粉体であれば良く、例
えば、普通，早強，中庸熱ポルトランドセメント、それ
らポルトランドセメントに高炉スラグ，フライアッシュ
またはシリカを混合した混合セメント、セメント系固化
材、石灰系固化材などが挙げられる。The hydraulic powder to be used may be any powder having a hydraulic property capable of exhibiting a desired uniaxial compressive strength. For example, ordinary, early-strength, moderately heated Portland cement, and blast furnace slag are added to these portland cements. , A cement mixed with fly ash or silica, a cement solidified material, a lime solidified material, and the like.
【００１７】軽量骨材および水硬性粉体の混合方法は、
特に限定しないが、例えば、湿潤状態の軽量細骨材およ
び軽量粗骨材の所定量を慣用のミキサ−に投入し混合し
たのち、前記水硬性粉体を投入し混合を継続するか、ま
たは、軽量細骨材，軽量粗骨材および水硬性粉体を上記
ミキサ−に投入し混合するかして、軽量骨材の表面に水
硬性粉体を付着させ粒状体とする方法が挙げられる。The method for mixing the lightweight aggregate and the hydraulic powder is as follows.
Although not particularly limited, for example, after a predetermined amount of wet lightweight fine aggregate and lightweight coarse aggregate is charged into a conventional mixer and mixed, the hydraulic powder is charged and mixing is continued, or There is a method in which the lightweight fine aggregate, the lightweight coarse aggregate and the hydraulic powder are charged into the mixer and mixed, and the hydraulic powder is attached to the surface of the lightweight aggregate to form a granular material.
【００１８】以上のようにして、軽量骨材の表面に水硬
性粉体を付着させた粒状体は、例えば、盛土，基礎地
盤，地盤の空隙部などについて、予定した地面の高さ
(整地面)まで盛土、構築あるいは充填して、固化させ
る。盛土および基礎地盤の構築は、軟弱地盤や土圧の低
減を図りたい地盤上での盛土および構築や、特に盛土地
盤を基礎として構造物を建造する場合、盛土自体が圧縮
したり不同沈下したりする場合に行なう。地盤の空隙部
とは、例えば、構造物を建造するために、整地したさい
に生じる空隙(または凹部)はもとより、擁壁と地盤間の
空隙，擁壁と既設盛土間の空隙，擁壁間の空隙，杭周辺
の空隙などを指し、それらの大きさや形状は問わない。As described above, the granular material obtained by adhering the hydraulic powder to the surface of the lightweight aggregate is, for example, embankment, foundation ground, or a gap between the ground and the like, at a predetermined ground height.
(Fill level), fill or build and solidify. Construction of the embankment and foundation ground may be performed on soft ground or on the ground where the earth pressure is to be reduced, or when the structure is built on the foundation of embankment, the embankment itself may be compressed or settled unevenly. If you do. The gaps in the ground include, for example, the gaps (or recesses) generated when the ground is leveled to construct a structure, the gaps between the retaining wall and the ground, the gaps between the retaining wall and the existing embankment, and the gaps between the retaining walls. And the space around the pile, etc., regardless of their size or shape.
【００１９】盛土・充填方法は、常套手段にしたがう。
盛土または充填後、上面をビニ−ルシ−トその他のシ−
トで覆い、７日以上養生するのが好ましい。養生し硬化
させることにより盛土または充填した粒状体は、固化の
進行と共に一体となり一つの構築物となる。その構築物
は、1ｇ／ｃｍ3以上の湿潤密度を有し、1.0Ｎ／ｍｍ2以
上の一軸圧縮強さを発現し、変形量も小さい。The embankment / filling method follows conventional means.
After embankment or filling, top surface is covered with vinyl sheet or other sheet.
It is preferable to cover with ト and cure for 7 days or more. The embankment or the filled granular material by curing and curing is integrated with the progress of solidification to form one structure. The construct has a wet density of 1 g / cm 3 or more, develops a uniaxial compressive strength of 1.0 N / mm 2 or more, and has a small deformation.
【００２０】なお、上記粒状体を盛土，基礎地盤の構築
または地盤の空隙部に充填した後、ブルド−ザ−などで
整地し、さらに慣用の振動機(タンピングランマ−，プ
レ−トコンパクタ−，振動ロ−ラ−など)を用いて粒状
体に振動を加えたり、転圧して締固めを行なうことによ
って、粒状体間の接点が増加し、構築物の一軸圧縮強さ
が一層向上し、変形量も小さくなる。ただし、締固める
ことで密度の増加と透水性の減少が生じるので、小密度
や高透水性が要求される場合には、締固め仕事量を適宜
調整する必要がある。After filling the above-mentioned granular material into the embankment, the construction of the foundation ground or the void space of the ground, the ground is leveled by a bulldozer or the like, and further the conventional vibrator (tamping rammer, plate compactor, vibration By applying vibration to the granular material using a roller, etc., or by compacting by rolling, the number of contacts between the granular materials increases, the uniaxial compressive strength of the structure is further improved, and the amount of deformation is also increased. Become smaller. However, since compaction causes an increase in density and a decrease in water permeability, when a small density or high water permeability is required, it is necessary to appropriately adjust compaction work.
【００２１】以上のようにして施工された構築物(固化
体)の上面［粒状体を予定整地(基礎)面まで盛土した場
合はその面、整地面の僅かに下方まで盛土した場合は土
砂を当該整地面まで盛土し所要の締固めを行なった面］
は、原位置試験などで地盤の硬化を確認後、構造物を建
造する。The upper surface of the structure (solidified body) constructed as described above [the surface when the granular material is filled up to the predetermined leveling (foundation) surface; Surface with embankment to level ground and required compaction]
After confirming the hardening of the ground by an in-situ test etc., construct the structure.
【００２２】[0022]
【実施例】以下、本発明の実施例を比較例と共に挙げ、
本発明を具体的に説明する。EXAMPLES Examples of the present invention will be described below together with comparative examples.
The present invention will be specifically described.
【００２３】以下の実施例，比較例で使用した材料は、
次のとおりである。 １．使用材料 水硬性粉体；「アサノクリ−ンセットＣＳ−10」(日本
セメント社製) 軽量細骨材；「アサノライト−Ｓ」(日本セメント社製) 軽量粗骨材；「アサノライト−Ｇ」(日本セメント社製)The materials used in the following Examples and Comparative Examples are as follows:
It is as follows. 1. Materials used Hydraulic powder; "Asano Clean Set CS-10" (manufactured by Nippon Cement Co., Ltd.) Lightweight fine aggregate; "Asanolite-S" (manufactured by Nippon Cement Co., Ltd.) Light coarse aggregate; "Asanolite-G" ( (Nippon Cement Co., Ltd.)
【００２４】２．配合・混合・充填(盛土)・養生 表１に示す配合にしたがって、上記材料をパン型ミキサ
−(0.1ｍ3)に投入し、1.5分間攪拌・混合して、軽量骨
材の表面に水硬性粉体を付着させた粒状体を調製した。
得られた各粒状体をＣＢＲモールドに「JIS A 1210(突
固めによる土の締固め試験方法；締固め第２法)」に準
じて充填締固めし(ランマは4.5ｋｇである)、７日間，2
0℃で気中養生して、供試体を得た。2. Blending, mixing, filling (filling), curing According to the composition shown in Table 1, the above materials were put into a pan-type mixer (0.1 m 3 ), stirred and mixed for 1.5 minutes, and hydraulic A granular material to which powder was attached was prepared.
Each of the obtained granules is filled and compacted in a CBR mold in accordance with "JIS A 1210 (Testing method for compaction of soil by compaction; compaction method 2)" (Rammer is 4.5 kg) for 7 days. , 2
The specimen was obtained by curing in the air at 0 ° C.
【００２５】３．供試体の試験 次に示す(1)〜(3)の特性について測定し、得た結果を表
１に併記した。 (1) 湿潤密度(ｇ／ｃｍ3)：養生(7日)後、総重量を測定
し、その値から容器重量を差し引き、容器の容積で除し
て求めた。 (2) 圧縮ひずみ(％)：日本道路公団の規格「岩の破砕率
試験方法」に準じた試験機を用い、8ｋｇｆ／ｃｍ2載荷
して測定した。 (3) 一軸圧縮強さ(Ｎ／ｍｍ2，材令7日)：JIS A 1210
（突固めによる土の締固め度試験方法）に準じて測定し
た。3. Test of Specimen The characteristics of the following (1) to (3) were measured, and the obtained results are shown in Table 1. (1) Wet density (g / cm 3 ): After curing (7 days), the total weight was measured, the container weight was subtracted from the value, and the result was divided by the volume of the container. (2) Compressive strain (%): Measured by loading 8 kgf / cm 2 using a testing machine in accordance with the standard of the Japan Highway Public Corporation “Rock crushing rate test method”. (3) Uniaxial compressive strength (N / mm 2 , material age 7 days): JIS A 1210
(Soil compaction test method by compaction) was measured.
【００２６】[0026]
【表１】 [Table 1]
【００２７】上記表１から、本発明の“湿潤軽量骨材に
水硬性粉体を付着させた粒状体”を空隙部に充填する実
施例１および２は、湿潤密度が大きく(1ｇ／ｃｍ3以
上)、かつ圧縮ひずみが小さいことが判明した。また、
十分な一軸圧縮強さを具備していることも判った。これ
に対し、水硬性粉体を混合しない比較例１および２で
は、湿潤密度は実施例と大きな差異はないものの、圧縮
ひずみが著しく大きかった。From Table 1 above, in Examples 1 and 2 in which the “granules obtained by adhering the hydraulic powder to the wet lightweight aggregate” of the present invention are filled in the voids, the wet density is large (1 g / cm 3). Above), and the compression strain was found to be small. Also,
It was also found to have sufficient uniaxial compressive strength. On the other hand, in Comparative Examples 1 and 2 in which the hydraulic powder was not mixed, although the wet density was not significantly different from that of the example, the compression strain was significantly large.
【００２８】なお、実施例１および実施例２について
は、前記測定のほかに透水性試験を行なった。前記一軸
圧縮強さ測定を行なうときの要領で供試体を作製し、養
生(7日)後、モ−ルドの底板を取り外し、上部から30秒
間、10リットル注水して透水状態を調べた結果、透水性
は良好であり、上部から溢水することはなかった。In Examples 1 and 2, a water permeability test was conducted in addition to the above measurements. A specimen was prepared in the same manner as when performing the uniaxial compressive strength measurement, and after curing (7 days), the bottom plate of the mold was removed, and 10 liters of water were injected from the upper part for 30 seconds to check the water permeation state. The water permeability was good and there was no overflow from the top.
【００２９】[0029]
【発明の効果】本発明は、以上詳記したように、湿潤状
態の軽量骨材に水硬性粉体を付着させた粒状体を盛土
に、基礎地盤の構築に、及び／又は、地盤の空隙部の充
填に、使用して固化させることにより、構築物は十分な
透水性を有し、1ｇ／ｃｍ3以上の湿潤密度を具備し、圧
縮ひずみが小さく、かつ1.0Ｎ／ｍｍ2以上の一軸圧縮強
さを発現する、と言う効果を発揮する。それ故に、粒状
体間に雨水が堆積したり、それによって構築物に浮力が
生じたり、粒状体の変形により構築物が圧縮して体積変
化を生じたりすることもなく、また、擁壁などの裏込め
材として使用した場合は、粒状体表面の水硬性粉体が硬
化して一体となることによって側圧を防ぐことができる
ため、擁壁や構築物上に建造された構造物へ影響を及ぼ
すこともない。As described in detail above, the present invention relates to embedding a granular material obtained by adhering a hydraulic powder to a wet lightweight aggregate, to construct a foundation ground, and / or forming a void in the ground. By using and solidifying to fill the part, the construct has sufficient water permeability, has a wet density of 1 g / cm 3 or more, has a low compression strain, and has a uniaxial compression of 1.0 N / mm 2 or more. It exerts the effect of expressing strength. Therefore, rainwater does not accumulate between the granules, which causes buoyancy in the structure, and the deformation of the granules does not compress the structure to change the volume, and also prevents backfilling of retaining walls and the like. When used as a material, since the hydraulic powder on the surface of the granular material hardens and becomes unitary, side pressure can be prevented, so it does not affect the retaining wall or the structure built on the structure .
Claims (5)
し付着させた粒状体を、盛土に、基礎地盤の構築に、お
よび／または、地盤の空隙部の充填に、使用して固化さ
せることを特徴とする軽量土工法。1. A granulated material obtained by mixing and adhering hydraulic powder to wet lightweight aggregate is used for embankment, for constructing a foundation ground, and / or for filling voids in the ground. A lightweight earthwork method characterized by solidification.
(かさ容積)に対して水硬性粉体を10〜150ｋｇ混合し付
着させたものであることを特徴とする請求項１記載の軽
量土工法。2. The method according to claim 1, wherein the granular material is 1 m 3 of a lightweight aggregate in a wet state.
2. The lightweight earth method according to claim 1, wherein 10 to 150 kg of hydraulic powder is mixed and adhered to (bulk volume).
礎地盤に構築に、および／または、地盤の空隙部の充填
に、使用することを特徴とする請求項１または請求項２
記載の軽量土工法。3. The method according to claim 1, wherein the compact is used for embankment, for building on a foundation ground, and / or for filling gaps in the ground while compacting the granular material.
The described lightweight earthwork method.
骨材からなり、かつ、それらの割合が1：9〜5：5(重量
比)であることを特徴とする請求項１または請求項２記
載の軽量土工法。4. The method according to claim 1, wherein the lightweight aggregate comprises a lightweight fine aggregate and a lightweight coarse aggregate, and their ratio is 1: 9 to 5: 5 (weight ratio). The lightweight earthwork method according to claim 2.
以上であることを特徴とする請求項１，請求項２または
請求項４記載の軽量土工法。5. The lightweight aggregate has a wet density of 1 g / cm 3.
5. The lightweight earthwork method according to claim 1, wherein the lightweight earthwork method is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14833097A JP3599303B2 (en) | 1997-06-05 | 1997-06-05 | Light earth method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14833097A JP3599303B2 (en) | 1997-06-05 | 1997-06-05 | Light earth method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10338929A true JPH10338929A (en) | 1998-12-22 |
| JP3599303B2 JP3599303B2 (en) | 2004-12-08 |
Family
ID=15450372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14833097A Expired - Fee Related JP3599303B2 (en) | 1997-06-05 | 1997-06-05 | Light earth method |
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| Country | Link |
|---|---|
| JP (1) | JP3599303B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005264718A (en) * | 2004-02-19 | 2005-09-29 | Mitsui Kagaku Sanshi Kk | Ground foundation reinforcing structure |
| JP2007247323A (en) * | 2006-03-17 | 2007-09-27 | Penta Ocean Constr Co Ltd | Method of creating aerated lightweight soil |
| JP2018184823A (en) * | 2017-04-27 | 2018-11-22 | 新日鐵住金株式会社 | Ground material and ground improvement method |
-
1997
- 1997-06-05 JP JP14833097A patent/JP3599303B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005264718A (en) * | 2004-02-19 | 2005-09-29 | Mitsui Kagaku Sanshi Kk | Ground foundation reinforcing structure |
| JP2007247323A (en) * | 2006-03-17 | 2007-09-27 | Penta Ocean Constr Co Ltd | Method of creating aerated lightweight soil |
| JP2018184823A (en) * | 2017-04-27 | 2018-11-22 | 新日鐵住金株式会社 | Ground material and ground improvement method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3599303B2 (en) | 2004-12-08 |
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