1262228 九、發明說明 【發明所屬之技術領域】 本發明係關於謀求地盤的改良工事、地盤的液狀化防 止或大深度掘削時的地盤補強效果之施工技術；特別係屬 於如液狀化防止施工工事那樣的用於大容量地盤的地盤改 良之注.入的技術領域之技術；詳細言之，係關於一種地盤 注入裝置及地盤注入工法，將安裝著膨縮封孔器之內管， 插入地盤中的外管內，使此膨縮封孔器膨脹而形成管內空 間，進而使注入液經過此管內空間和外管吐出口，注入地 盤中；接著’使膨縮封孔器收縮，並使注入級層移動之 後，再度使其膨脹而形成管內空間，同樣地重複動作，將 注入液注入地盤中。 本發明特別係關於一種地盤注入裝置及地盤注入工 法，能夠將凝膠化時間任意地控制爲瞬間固結〜長時間固 結，複數種注入液的任意切換、複數種注入液在地盤中的 反應等，是容易的；並能防止注入液逸出至注入對象區域 以外或是逸出至地表表，因此可以確實地進行廣範圍的浸 透固結；而且’不僅加快注入工程，且可以對應地盤條件 或注入目的等’進行最適當的注入；進而，同時地從複數 個吐出口進行注入，使施工效率提高爲習知的2倍以上， 且注入液在水平方向互相拘束而平行地浸透。 【先前技術】 從以前開始’以地盤掘削或大深度地下工程的周邊地 -5- (2) 1262228 @胃首’對於因爲地下水的存在而帶有流 ^化現象之安定化施工技術，藉由將注入 Μ盤的削孔中，再注入水泥漿或藥液等的 _分、的或廣範圍地強化之施工形態，被廣 例如，以往已知有一種技術，具備將 的鑽孔或被設置在該處的套筒管等的注入 側、及被裝設在注入孔內的裝置本體（內 封閉的封孔器，並將藥液注入藉由該封孔 間內，利用該藥液來改良外管周圍的地 2814475 號）。 此技術的特徵爲：使用至少混合二種 藥液；在裝置本體中，至少設置用來搬送 流路、及用來搬送第2藥液之第2流路； 中，形成用來將前述各藥液從各個第1流 末端部，往裝置本體的外部流出之二系統 噴嘴可以藉由開關閥而開關可能地閉塞。 此種工法，在將裝置本體直接插入注 注入對象地盤由於係容易崩潰的土砂，注 在崩潰中；因此，使裝置本體往上下方向 每個注入級層的注入是不可能的。又，在 注入外管內的情況，通常，係將封閉水泥 管的外側’再使從內管來的注入液，打破 而注入地盤中。但是，經由封閉水泥漿的 注入源的直徑相當於注入管外徑（大約1 動性的地盤的液 管插入形成在該 硬化材，使地盤 泛地採用。 被形成在地盤中 孔（外管）的內 管）之間，加以 器而被封閉的空 盤（日本特許第 成分者，來作爲 第1藥液之第1 同時在裝置本體 路、第2流路的 的噴嘴，任一個 入孔內的情況， 入孔壁一般是正 移動將變困難， 將裝置本體插入 漿塡充在注入外 此封閉水泥漿， 注入，基本上係 〇cm左右）的球 -6- (3) 1262228 之球狀注入，從凝膠化時間短的二系統流路來的合流注入 的情況’注入浸透源小，注入液便容易發生堵塞，因此， 難以使浸透範圍變廣。 亦即，如液狀化防止工法般地想要將硬化材從1根注 入管廣範圍地注入寬廣範圍的地盤1中之情況，對於從複 數條流路來的合流注入而言，由於在注入管的周圍之藉由 封閉水泥漿所造成的密封，用來使硬化材浸透入地盤中之 往地盤的開口部少，二氧化矽的凝膠化物沉積，會發生難 以將每分鐘大量的吐出量，均質且長時間、廣範圍地均勻 持續浸透之困難點。 又，在實際的施工中，係將封閉水泥漿塡充在外管和 削孔壁之間，等待此封閉水泥漿的固化（一般爲7日〜1 0 曰）之後，再注入浸透性水泥漿。此情況，不僅施工時間 變長，封閉水泥漿在削孔內發生沉澱、或是由於從周邊開 始發生的砂的崩壞，水泥漿與砂混合，而在深度方向不均 質地固結；結果，浸透性水泥漿的吐出浸透被阻礙。 進而，已知有一種注入裝置，具備：在其長度方向劃 分各個區段，並形成有注入口之外管；及被作成在此外管 內往軸心方向移動自如之內管構件（日本特開6 1 - 1 8 66 1 3 號）。 此裝置的特徵爲：其內管構件具備：具有複數條獨立 流路之內管；及在其長度方向隔開間隔地設置，且分別與 外管的內面內接，以謀求水泥漿的液密而設置之三個以上 的封孔器部；前述內管的各流路以一對一的方式獨立地連 (:4) 1262228 通至在前述封孔器部之間的外管和內管的間隙中之相異的 注入室 c 但是，上述三個以上的封孔器部，與利用流體使其膨 脹而形成封孔器之膨縮封孔器相異，係利用橡膠環內接在 外管的內面上之封孔器。此種封孔器，在外管內，無法使 內管移動自如。其理由是因爲：注入地盤變深，外管會由 於土壓而變形；或是在水平方向的注入中，外管由於土壓 而彎曲，造成封孔器無法對應該變形，使得難以將內管插 入外管中。 在此，液狀化防止注入的設計形態的實例，如以下所 示。 必須進行以下的注入： 1 注入管的埋設間隔 p =形成2m X 2m的正方形酉己 置 2 注入速度 f=設爲1 5 ( 1/分） 3 注入管每一孔的改良平面積 Ap = 2mx2m = 4m2 4 每一級層的改良土量（m3) V = 2m (改良高度） χ 4 m2 = 1 6 m 3126. The invention relates to a construction technique for improving the construction site, preventing liquidification of the site, or reinforcing the ground at the time of deep excavation; in particular, it is a liquidification prevention construction. A technique for the improvement of the site for large-capacity sites, such as fortifications. In particular, it relates to a site injection device and a site injection method, and the inner tube to which the expansion and contraction sealer is mounted is inserted into the site. In the outer tube, the expansion and contraction sealer is expanded to form a space inside the tube, and then the injection liquid is injected into the ground through the inner space of the tube and the outer tube discharge port; then 'the expansion and contraction sealer is shrunk, and After the injection level layer is moved, it is again expanded to form an inner space of the tube, and the operation is repeated in the same manner, and the injection liquid is injected into the ground. The invention relates to a site injecting device and a site injecting method, which can arbitrarily control the gelation time to instantaneous consolidation to long-time consolidation, any switching of a plurality of infusion solutions, and reaction of a plurality of infusion solutions in the ground disk. Etc., is easy; and prevents the injection solution from escaping out of the injection target area or escaping to the surface surface, so that a wide range of soaking consolidation can be reliably performed; and 'not only speeding up the injection process, but also corresponding to the site condition In the meantime, the injection is performed at the same time, and the injection is carried out from a plurality of discharge ports to increase the work efficiency by a factor of two or more, and the injection liquid is mutually restrained in the horizontal direction and penetrates in parallel. [Prior Art] From the past, 'the surrounding area of the site excavation or deep underground engineering-5- (2) 1262228 @胃首' for the stability of the construction technology due to the existence of groundwater, by It is injected into the hole of the boring plate, and then injected into the slag or the wide-strength reinforced construction form of the cement slurry or the chemical liquid. For example, a technique has been known in the prior art, and the hole is drilled or set. The injection side of the sleeve tube or the like at this point, and the device body (the inner closed sealing device), and the injection of the chemical solution into the sealed space, is improved by the chemical solution Ground around the outer tube, number 2814475). This technique is characterized in that at least two kinds of chemical liquids are mixed, and at least a second flow path for transporting the flow path and for transporting the second chemical liquid is provided in the apparatus body; The two system nozzles from which the liquid flows from the end portions of the first flow to the outside of the apparatus body can be occluded by the switch by the on-off valve. In this method, the device body is directly inserted into the injection target site due to the collapse of the soil sand, which is collapsed; therefore, it is impossible to inject the injection body into the injection layer. Further, in the case of injection into the outer tube, usually, the outer side of the cement pipe is closed, and the injection liquid from the inner tube is broken and injected into the ground plate. However, the diameter of the injection source through the closed cement slurry corresponds to the outer diameter of the injection pipe (the liquid pipe of the ground movable plate is inserted into the hardened material to make the ground plate widely used. The hole formed in the ground plate (outer pipe) Between the inner tube and the inside of the hole, the first part of the first chemical liquid is used as the first one of the first chemical liquid, and the nozzle of the second main flow path, either in the inlet hole. In the case of the hole wall, it is generally difficult to move positively. Insert the body of the device into the slurry and fill it with the closed cement slurry, and inject it into the spherical ball of the ball-6-(3) 1262228. In the case of the merging injection from the two-system flow path having a short gelation time, the injection permeation source is small, and the injection liquid is likely to be clogged, so that it is difficult to widen the penetration range. In other words, in the case of a liquidization prevention method, it is desirable to inject a hardened material into a wide range of the ground 1 from a single injection pipe, and for a combined injection from a plurality of flow paths, since it is injected The seal around the tube is closed by the cement slurry, and the opening for the hardened material to penetrate into the ground plate is less, and the gelation of the cerium oxide is deposited, which makes it difficult to discharge a large amount per minute. It is a difficult point of homogenization and long-term, uniform and continuous continuous soaking. In addition, in the actual construction, the closed cement slurry is filled between the outer pipe and the hole wall, and after the solidification of the closed cement slurry (generally 7 days to 10 曰), the penetrating cement slurry is injected. In this case, not only the construction time becomes longer, the closed cement slurry precipitates in the hole, or the sand breaks from the periphery, the cement slurry mixes with the sand, and is unevenly consolidated in the depth direction; The spouting of the penetrating cement slurry is hindered. Further, there is known an injection device comprising: a tube that is divided into respective sections in the longitudinal direction thereof and formed with an injection port; and an inner tube member that is freely movable in the axial direction of the tube (Japanese Patent Laid-Open) 6 1 - 1 8 66 1 3). The device is characterized in that the inner tube member comprises: an inner tube having a plurality of independent flow paths; and is disposed at intervals in the longitudinal direction thereof, and is respectively inscribed with the inner surface of the outer tube to obtain a liquid of the cement slurry Three or more sealer portions are provided in a dense manner; the flow paths of the inner tube are independently connected in a one-to-one manner (: 4) 1262228 to the outer tube and the inner tube between the aforementioned plug seal portions Different injection chambers in the gaps. However, the above three or more sealer portions are different from the expansion and contraction sealers that are expanded by a fluid to form a sealer, and are connected to the outer tube by a rubber ring. The hole sealer on the inner surface. Such a hole sealer cannot move the inner tube freely in the outer tube. The reason is because the injection site becomes deeper and the outer pipe is deformed by the earth pressure; or in the horizontal injection, the outer pipe is bent due to the earth pressure, so that the sealer cannot be deformed correspondingly, making it difficult to inner pipe Insert into the outer tube. Here, an example of a design form in which liquidification is prevented from being injected is as follows. The following injections must be made: 1 Embedding interval of the injection tube p = Square formation of 2 m X 2 m 2 Injection speed f = 1 5 (1/min) 3 Improved flat area per hole of the injection tube Ap = 2mx2m = 4m2 4 Improved soil volume per first layer (m3) V = 2m (modified height) χ 4 m2 = 1 6 m 3
5 每一級層的硬化材注入量（k 1 ) Q Q = Vx ( 0.35 〜0.40) =5.6 〜6.4kl 在此，注入率爲0.35〜0.40。 6 每一級層的注入時間 tl = 6kl+0.015kl /分=400分 =6 · 6小時（注入繼續時間） -8 - (5) 1262228 若如此地進行’藉由從球狀浸透源長時間地注入凝膠 化時間長的注入液’並使所得到的球狀浸透固結體，平面 且上下地連續’大容量土的急速應該成爲可能。如此，若 使球狀浸透源的上下間隔變的越長、或是注入孔間隔變的 越廣，則必須要使凝膠化時間變的越長而進行大量的注 入。但是，若使浸透源的上下間隔越長、或是使注入孔間 隔越廣，則注入量變大’且變成含有不均質的土層，變成 容易逸脫至注入範圍外。又’長凝膠化時間的注入液’在 各個規定的注入級層’沒有形成確實的固結體。 又，若使注入孔間隔越長，注入浸透範圍變廣，也不 得不使凝膠化時間變長’因此，注入液無法避免地會往地 表面流出。又，例如凝膠化時間1 〇小時的水泥漿，容易 逸出至地表面，等待其凝膠化再注入之事，由於在工程上 有困難，所以廣範圍的浸透固結變成不可能。 爲了防止此情況發生，不得不使凝膠化時間變短。但 是，在此種情況下，無法進行廣範圍地土粒子間浸透。 【專利文獻1】日本特許第2 8 1 44 7 5號公報 【專利文獻2】日本特開昭6 1 - 1 8 6 6 1 3號公報 【發明內容】 (發明所欲解決之課題） 本發明所要解決的課題爲：使用凝膠化時間長的水泥 漿，即使加大注入孔間隔，在各個注入級層，可以確實地 得到大型固結體；進而，不僅注入工程可以加快1倍以 (6) 1262228 上，也可以對應地盤條件或注入目的等，進行最適當的注 入；而且，即使增長注入孔間隔或上下的注入吐出口的間 隔，注入液在水平方向互相拘束而可以水平地浸透。又， 長凝膠化時間的水泥漿，若真的在注入中逸出至地表面、 也容易瞬間固結而防止逸出，而繼續不斷地進行凝膠化時 間長的水泥漿的注入。 (解決課題所用的手段） 爲了解決上述課題，若根據本發明的地盤注入裝置， 其特徵爲： 具備：外管，此外管被插入地盤的削孔中，並在其外 g，具有被橡膠套筒覆蓋之複數個的外管吐出口；及 內管，此內管移動自如地被插入該外管內，在其外彻j 長度方向，隔開間隔地安裝三個以上藉由流體的充塡、排 出而膨縮自如的膨縮封孔器； 該內管，分別獨立地具備：將注入液送液之複數條注 入液流路、及將流體導入則述膨縮封孔器內而使其膨脹或 是排出流體而使其收縮之封孔器流路； 當將流體充塡入前述膨縮封孔器內而使其膨脹時，在 互相相鄰的膨縮封孔器之間，形成複數個噴出位置； 前述注入液流路的吐出口，分別位置各個噴出位置， 並使前述噴出位置與外管吐出口重合之後，藉由通過封孔 器流路，將流體導入前述三個以上的膨縮封孔器內而使其 膨脹，而在藉由被互相相鄰的膨縮封孔器夾住的間隙中， -10- (7) 1262228 形成管內空間，然後使注入液從吐出口經過管內空間和外 管吐出口·注入地盤中。 進而，爲了解決上述課題，若根據本發明的地盤注入 工法，其特徵爲： 在被形成於要改良的地盤中的削孔中，插入外管，該 外管在其外壁具有被橡膠套筒覆蓋的複數個外管吐出口； 在此外管內，移動自如地插入內管，此內管，在其外 側長度方向，隔開間隔地安裝三個以上的膨縮封孔器，並 將互相相鄰的膨縮封孔器之間設爲噴出位置，而且，在此 內管的內部，分別獨立地形成：其吐出口位於各個噴出位 置之複數條注入液流路、及將流體導入膨縮封孔器內而使 其膨脹或是排出流體而使其收縮之封孔器流路； 使前述噴出位置與外管吐出口重合之後，通過封孔器 流路，將流體導入前述三個以上的膨縮封孔器內而使該膨 縮封孔器膨脹，藉此而在藉由被互相相鄰的膨縮封孔器夾 住的間隙中，形成管內空間，然後使注入液從吐出口經過 管內空間和外管吐出口，注入地盤中；接著，將流體從膨 縮封孔器排出而使膨縮封孔器收縮，移動內管，而使噴出 位置與其他的外管吐出口重合，移動注入級層之後，再使 膨縮封孔器膨脹而形成管內空間，同樣地重複動作，將注 入液注入地盤中。 進而，又爲了解決上述課題，若根據本發明的地盤注 入工法，其特徵爲： 在被形成於要改良的地盤中的削孔中，插入外管，該 -11 - (8) 1262228 外管在其外壁具有被橡膠套筒覆蓋的複數個外管吐出口； 在此外管內·移動自如地插入內管，此內管，在其外 側長度方向，隔開間隔地安裝一對膨縮封孔器，並將這二 個膨縮封孔器之間設爲噴出位置，而且、在此內管的內 部，分別獨立地形成：其吐出口位於各個噴出位置之複數 條注入液流路、及將流體導入膨縮封孔器內而使其膨脹或 是排出流體而使其收縮之封孔器流路； 使前述噴出位置與外管吐出口重合之後，通過封孔器 流路，將流體導入一對膨縮封孔器內而使該膨縮封孔器膨 脹，藉此而在藉由被一對膨縮封孔器夾住的間隙中，形成 管內空間，然後使注入液從吐出口經過管內空間和外管吐 出口，注入地盤中；接著，將流體從膨縮封孔器排出而使 膨縮封孔器收縮，移動內管，而使噴出位置與其他的外管 吐出口重合，移動注入級層之後，再使膨縮封孔器膨脹而 形成管內空間，同樣地重複動作，將注入液注入地盤中。 〔發明之效果〕 上述的本發明，發揮以下的效果。 (1 )地盤均勻的情況，若同時地注入相同注入液的 A液和B液，能夠以通常的二倍的長度的注入級層來進行 注入，施工效率變成二倍。 (2 )地盤由複雜的地層構成的情況’將A液設爲懸 濁型水泥漿、將B液設爲溶液型水泥漿；或是將浸透性差 的水泥漿設爲A液、將浸透性佳的水泥液設爲B液’進 -12- (9) 1262228 而將凝膠化時間短的水泥漿設爲A液、將凝膠化時間長 的水泥漿設爲B液，若一邊將這些A、B液從二個管內空 間同時地注入一邊拉起內管，移動注入級層來注入的話， 能夠對已經注入A液的區域，重疊地注入B液’不僅能 夠使施工效率變成二倍，在以高強度固結的區域’進行具 有止水效果的注入，能夠同時地進行高強度地盤改良及止 水改良。 使凝膠化時間相異的A液、B液，從二個噴出位置亦 即從二個注入級層各自同時地注入的情況’利用獨立地被 設置在各個注入液流路中的流量計、壓力計、注入泵，進 行注入管理，可以對應地盤條件或注入目的等，進行最適 當的注入。此注入，適合應用於地盤是由複雜的地層所構 成的情況。此情況，施工速度也變成二倍。 進而，粗質地土層和細質地土層交互疊層的地盤的情 況，將 A液設爲懸濁型水泥漿或凝膠化時間短的水泥 漿、將B液設爲凝膠化時間長的溶液型水泥漿，移動噴出 位置，一邊改變注入級層一邊將A液注入粗質地土層、 將B液注入細質地土層，或是將已經注入A液的土層， 重疊地注入B液。藉此，利用懸濁型水泥漿來進行高強度 的地盤改良，同時利用溶液型水泥漿進行土粒子間浸透注 入，能夠進行固結和止水的同時處理。 (3 )將A液設爲水玻璃溶液、將B液設爲反應性水 溶液，藉由一邊移動注入級層一邊注入A、B液，對已經 注入A液的區域，注入B液，使A液、B液在地盤中反 -13- (10) 1262228 應。此情況，可以改良地盤而解決如水玻璃和氯化鈣水溶 液般的雖然可以得到高強度，但是由於瞬間固結而難以浸 透之缺點。亦即，使水玻璃作爲A液而使其浸透入地盤 中，而趁著此水玻璃沒有流失至外部，亦即趁著水玻璃塡 充在土粒子間的間隙中的時候，將氯化鈣水溶液重疊地注 入，水玻璃和氯化鈣在土粒子間反應，而能夠廣範圍地固 結。 如此地對應地盤條件或使用注入液的注入目的等，能 夠將A液、B液同時地注入或是交互地注入。這是由於A 液、B液能夠通過獨立的注入液流路而從複數個外管吐出 口各自地注入地盤中，所以不僅注入工程可以加快成二倍 以上，也可以對應地盤條件進行最適當的注入。 (4 )藉由從上下相鄰的噴出位置（注入級層）將 A、B注入液分別同時地注入，上下的注入液互相拘束， 在水平方向均等地浸透；因此，規定形狀的浸透固結變成 可能。若一級層一級層地注入，從最初的注入級層來的注 入液會走在前頭而浸透至相鄰的注入級層所負責的區域， 並且固結，造成從接著的注入級層來的注入的時候，注入 將變困難；或是注入的形狀變成不規則等，因而在規定的 處所，規定的固結形狀的注入變困難。 (5 )在土壓會變大之注入深度深的處所，設置注入 管，或是在水平方向設置注入管等，外管容易變形，內管 的移動變困難的處所，藉由使用膨縮封孔器，若使膨縮封 孔器收縮，則移動變容易。以往，代替膨縮封孔器而使用 -14 - 1262228 Μ1 ) 橡膠環。此情況，由於封孔器功能係利用橡膠環和外管之 間的摩擦，所以特別是使用三階段以上的橡膠環封孔器的 情況，摩擦變大，內管的移動困難。 (6 )不使用膨縮封孔器而使用彈性橡膠環的情況· A、B混合液的凝膠塡充在管內空間；此情況，必須拉起 內管來洗淨管內空間。 相對於此，若使用膨縮封孔器，注入A、B混合液以 後，藉由中斷來自封孔器流路的流體的壓送而使膨縮封孔 器收縮，管內空間內之變成凝膠的注入液，會往外管下方 落下而被排除。或者，藉由從注入液流路來的送水，凝膠 被排出至地上部。不論任何一種情況，皆不需要如習知般 地拉起內管來加以洗淨。 (7 )如水玻璃和氯化鈣般，藉由混合而瞬間固結的 溶液’在先將水玻璃，接著將氯化鈣交互地注入地盤中的 情況，若使膨縮封孔器收縮，將殘存在管內空間中的水玻 璃排除至外管下方之後、或是水洗之後，使封孔器膨脹， 再將氯化鈣送液，則兩液不會在管內空間中進行反應，而 會在地盤中進行反應。 (8 )地盤均勻的情況，將相同的a、B二液，藉由 利用一個驅動體同時地使複數個泵動作，僅利用被設置在 一個流路中的泵和流量計，將其他流路的壓力、流量視爲 大約相同，來進行管理，施工被簡單化而有效率。 (9 )地盤由複雜的地層構成的情況，將相同的注入 液或是凝膠化時間相異的A、B液，從二個管內空間，分 -15- (12) 1262228 別同時地注入。此情況，這些注入管理，能夠藉由獨立地 被設置在各個管路中的流量計、壓力計、注入泵，進行最 適當的注入速度、注入壓力、注入量的注入。 【實施方式】 (實施發明的最佳形態） 以下，使用附上的圖面來詳細地說明本發明。 第1圖係本發明的一具體例裝置的說明圖、第2圖係 第1圖的實際的裝置的剖面圖、第3圖係本發明的其他具 體例裝置的說明圖、第4圖係第3圖的實際的裝置的剖面 圖、第5圖係本發明的其他注入系統的說明圖。 在第1圖和第2圖中所示的本發明裝置，基本上係由 外管7及內管10所構成。外管7，在其外壁3，具有被橡 膠套筒16覆蓋的複數個外管吐出口 17、17·..17。內管 1 0，係被構成：移動自如地被插入此外管7內，在其外側 長度方向，隔開間隔地安裝藉由流體的充塡、排出而膨縮 自如的三個以上的膨縮封孔器8、8 ... 8。 在內管1 〇的內部，分別獨立地具備：將注入液送液 之複數條注入液流路1 2、1 2 ;及將流體導入膨縮封孔器8 內而使其膨脹、或將流體排出而使其收縮之封孔器流路 1 3。而且，當膨縮封孔器8充塡流體而膨脹時，構成：在 相鄰的膨縮封孔器8、8…8之間，形成複數個噴出位置 9、9…9，而注入液流路1 2、1 2的吐出口 1 1、1 1，則分別 各自地位於這些噴出位置9、9 ... 9。 -16- (:13) 1262228 當要實施上述本發明的裝置時，首先，將外管7插入 地盤1的削孔2中，接著，使內管I 〇移動自如地插入外 管 7內。而且，使噴出位置 9、9與外管吐出口 17、 1 7…1 7重合（配合）之後，通過封孔器流路I 3，將流體 導入三個以上的膨縮封孔器8、8…8 ,使膨縮封孔器8、 8…8膨脹’藉此而在被互相相鄰的膨縮封孔器8、8…8夾 住的間隙1 4中，形成管內空間1 5 ’再使注入液從吐出口 1 1，經過管內空間丨5和外管吐出口 1 7、1 7…丨7，注入地 盤1中。 進而，上述本發明的裝置，係使流體從膨縮封孔器 8、8…8排出，移動內管1 〇之後，使噴出位置9與其他的 外管吐出口 1 7重合，來移動注入級層，再使膨縮封孔器 8、8…8膨脹而形成管內空間1 5、1 5，同樣地重複動作， 來將注入液注入地盤1中。 再者，本發明，如第1圖和第3圖所示，也能夠將封 閉水泥漿4塡充在外管7的外壁和削孔壁5之間的空間 6，再使注入液打破封閉水泥漿4而注入地盤1中。 使用上述本發明的裝置，本發明的地盤注入工法，如 下述般地施工。首先，如第1圖所示，在要改良的地盤1 中，形成削孔2。接著，將外管7插入此削孔2中，並將 封閉水泥漿塡充在外管7的外壁和削孔2的削孔壁5之間 的空間6。外管7，在其外壁，具有被橡膠套筒16覆蓋之 複數個外管吐出口 1 7、1 7... 1 7。 進而，使內管1 〇移動自如地插入上述外管7內。內 -17" (14) 1262228 管1 〇，在其長度方向’三個以上的膨縮封孔器8、8 ... 8隔 開間隔地被設置’而形成複數個噴出位置9亦即形成在第 1圖和第2圖中的二個連續的噴出位置9、9。進而，在內 管1 〇內，分別獨立地具備複數條注入液流路1 2和封孔器 流路1 3。注入液流路1 2，其吐出口丨1分別位於各自的噴 出位置9、9，並將Α液和Β液分別送液至各自的噴出位 置9、9之吐出口 1 1、1 1。 又，封孔器流路1 3，其吐出口 1 3 a位於各個膨縮封 孔器8，並通過吐出口 1 3 a，使膨縮封孔器8膨脹或收 縮。封孔器流體爲空氣 '非活性氣體、水等的流體，將封 孔器流體導入膨縮封孔器8內而使其膨脹，形成一對膨縮 封孔器8、8。結果，在外管7和內管1 0之間隙1 4中， 形成被膨脹後的一對膨縮封孔器8、8夾住的管內空間 1 5。再者，符號1 8爲A液貯槽、符號1 9爲B液貯槽； 在從這些貯槽1 8、1 9連通至內管1 〇的注入液流路1 2之 導管23、23中，配置泵20、流量計21及壓力計22。 又，封孔器流路1 3，其吐出口 1 3 a位於各個膨縮封 孔器8，將空氣、水等的流體導入膨縮封孔器8內而使其 膨脹，形成三個以上的膨縮封孔器8。此結果，在外管7 和內管1 0的間隙1 4中，形成藉由互相相鄰的三個以上的 膨縮封孔器8、8 ... 8而被夾住的二個以上的連續的管內空 間 1 5、1 5。 由上述構成所形成的本發明，係將注入液從注入液流 路1 2的吐出口 1 ]，經過管內空間〗5、〗5和外管吐出口 -18- (15) 1262228 1 7、1 7 ... 1 7，注入地盤1中。接著，使流體從膨縮封孔器 8 ' 8 ... 8排出而使膨縮封孔器8、8…8收縮：在此狀態 下，例如使內管1 0往上方移動而使噴出位置9、9與其他 的外管吐出口 1 7、1 7…1 7重合，而移動注入級層之後， 再度將流體塡充入膨縮封孔器8、8…8內而使其膨脹，形 成管內空間1 5、1 5，同樣地重複動作，將注入液注入地 盤1中。第2圖和第4圖中的符號2 4爲撓性管。 再者，在第3圖和第4圖中，具備一對膨縮封孔器 8、8，因此，噴出位置9爲一個。此情況，噴出位置9與 二個以上的外管吐出口 1 7、1 7重合；接著，通過封孔器 流路1 3，將流體導入一對膨縮封孔器8、8內而使膨縮封 孔器8、8膨脹，藉此，在藉由被一對膨縮封孔器8、8夾 住的間隙1 4中，形成管內空間1 5。 而且，使A、B液，從吐出口 11、1 1，經過管內空間 1 5、外管吐出口 1 7，使橡膠套筒1 6打開，進而打破封閉 水泥漿4而注入地盤1中。進而，使膨縮封孔器8、8收 縮，例如使內管1 〇往上方移動而使注入級層移動之後， 再度使膨縮封孔器8、8膨脹而形成管內空間1 5，與上述 同樣地，將注入液從吐出口 1 1、1 1，經過管內空間1 5和 外管吐出口 1 7、1 7，注入地盤1內，重複此注入。 上述的本發明，即使削孔壁5崩壞，注入液藉由分別 獨立的泵而從複數個吐出口 11、11，通過獨立的注入液 流路]2、1 2，被壓入地盤中。因此，注入液推壓崩壞砂 並被注入各自的分擔區域，而可以變成長條狀的柱狀浸 -19- (16) 1262228 透。再者，第5圖係表 注入系統。在第5圖中 情況，藉由將A液貯槽 液 A、B二液，利用-作，僅利用設在其中-2 1，另一條導管 2 3的 行管理，施工被簡單化 第1圖和第2圖的 和第4圖相同的效果以 間相異的A液、B液_ 時地注入的情況，利用 12、12中的流量計21、 入管理，對應地盤條件 入。 進而，在使用第1 地土質和細質地土層交 液設爲懸濁型水泥漿或 爲凝膠化時間長的溶液 一邊改變注入級層一邊 注入細質地土層，或是 液。藉此，利用懸濁型 同時利用溶液型水泥漿 固結和止水的同時處理 進而，使用第1圖 :示與第1、3圖相異構造的注入液 ’如上述那樣的，在地盤1均勻的 _ 1 8、B液貯槽1 9中的相同的注入 -個驅動體，使複數個泵同時地動 一條導管 2 3中的泵2 0和流量計 壓力、流量則視爲大約相同，來進 而有效率。 注入裝置，除了能夠達成與第3圖 外’進而使用該裝置而將凝膠化時 h續地從二個噴出位置9、9各自同 獨立地被設置在各自的注入液流路 •壓力計2 2、注入泵2 0，來進行注 、注入目的，可以進行最適當的注 圖和第2圖的注入裝置，注入粗質 互疊層的地盤1中的情況，將 A 凝膠化時間短的水泥紫、將B液設 型水泥漿，移動噴出位置9、9， 將A液注入粗質地土層、將b液 將已經注入A液的土層，又注入b 水泥獎來進行商強度的地盤改良， 進行土粒子間浸透注入，能夠進行 〇 和第2圖的注入裝置，藉由將水玻 -20- (17) 1262228 璃作爲A液浸透入地盤1中，並再注入作爲B液的氯化 鈣，水玻璃和氯化鈣在土粒子之間反應，能夠廣範圍地固 結。也可以同時地注入Α液、Β液；又，也可以重複膨縮 封孔器8的作動，將A液、B液分別地注入：進而’也可 以一邊移動級層一邊交互地注入A液、B液，使其在地盤 中反應^ 進而，如以下所述，一邊參照圖面一邊具體地詳細說 明本發明的地盤注入工程。首先，在要改良的地盤1 ’形 成削孔2 ◦當要削孔時，係使用一般習知的通常的削孔 機。接著，將具有被橡膠套筒16覆蓋的複數個外管吐出 口 1 7、1 7…1 7之外管7插入削孔2中。接著，將封閉水 泥漿4塡充在外管7的外壁和削孔2的削孔壁5之間的空 間6。結果，外管7被固定於削孔2中，同時地盤1也被 補強。 進而，將內管1〇插入外管7中。內管10，係被構 成：在其外側長度方向，一對至三個以上的膨縮封孔器 8、8隔開間隔地被設置，而形成一個或二個以上的噴出 位置9，且分別獨立地具備：將注入液送液至內側，其吐 出口 1 1位於各個噴出位置9處的複數條注入液流路1 2 ; 及將流體導入膨縮封孔器8內而使其膨脹之封孔器流路 1 3 ;進而通過封孔器流路1 3將流體導入一對或三個以上 的膨縮封孔器8、8內而使其膨脹，而在被互相相鄰的膨 縮封孔器8、8夾住的間隙1 4，形成管內空間1 5。 而且，當膨縮封孔器8膨脹時，內管！ 〇被固定在外 -21 - (18) 1262228 管7內；而當膨縮封孔器8收縮時，內管10可以在內管 1 0內移動自如。使內管1 〇的噴出位置9配合管外空間 6，然後使注入液’從注入液流路1 2的吐出口 ]】’通過 管內空間]5和外管吐出口 1 7，打破封閉水泥漿4而注入 地盤1中。 注入液流路1 2、1 2各自地與各個A液貯槽1 8、B液 - 貯槽1 9連通，藉由泵2 0的動作，一邊利用壓力計2 2、 流量計2 1進行調整，一邊進行最適當的注入。 0 (產業上的利用可能性） 本發明，不僅注入工程加快變成2倍以上，特別是也 可以對應地盤條件或注入目的等，進行最適當的注入；進 ~ 而，即使增長柱狀管外空間，由於注入液在水平方向互相 拘束而水平地浸透，所以在地盤注入技術領域中的利用可 能性極高。 【圖式簡單說明】 第1圖係本發明裝置的一具體例之模型圖。 第2圖係第1圖的實際的裝置的剖面圖。 第3圖係本發明裝置的其他具體例之模型圖。 第4圖係第3圖的實際的裝置的剖面圖。 第：> 圖係關於本發明的注入系統的模型圖。 . 【主要元件符號說明】 -22- 1262228 ι19) 1 :地盤 2 :削孔 3 :外壁 4 :封閉水泥漿 5 :削孔壁 6 :空間 7 :外管5 Injecting amount of hardened material per first layer (k 1 ) Q Q = Vx (0.35 to 0.40) = 5.6 to 6.4 kl Here, the injection rate is 0.35 to 0.40. 6 Injection time per layer tl = 6kl + 0.015kl / min = 400 points = 6 · 6 hours (injection continuation time) -8 - (5) 1262228 If so proceed 'by long time from the spherical soaking source It is possible to inject the infusion liquid having a long gelation time and to allow the obtained spherical shape to permeate the solidified body, and to continue in a plane and up and down. As described above, if the upper and lower intervals of the spherical permeation source become longer or the injection hole interval becomes wider, it is necessary to increase the gelation time and to perform a large amount of injection. However, if the upper and lower intervals of the permeation source are made longer or the injection hole spacing is wider, the injection amount becomes larger, and the soil layer containing the unevenness becomes easy to escape to the outside of the injection range. Further, the "injection liquid having a long gelation time" does not form a reliable consolidated body in each of the predetermined injection level layers'. Further, if the interval between the injection holes is increased, the injection permeation range becomes wider, and the gelation time does not have to be made long. Therefore, the injection liquid inevitably flows out to the surface. Further, for example, a cement slurry having a gelation time of 1 hour is likely to escape to the surface of the ground and wait for gelation and re-injection. Due to engineering difficulties, a wide range of soaking and consolidation becomes impossible. In order to prevent this from happening, it is necessary to make the gelation time shorter. However, in this case, it is impossible to infiltrate a wide range of soil particles. [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. 6 1 - 1 8 6 6 1 3 (Invention) The problem to be solved is to use a cement slurry with a long gelation time, and even if the injection hole spacing is increased, a large-sized solid body can be surely obtained in each injection level layer; further, not only the injection process can be accelerated by one time (6) In the case of the 1262228, the most suitable injection can be performed in accordance with the ground conditions or the purpose of the injection, and the injection liquid can be horizontally permeated in the horizontal direction even if the injection hole interval or the interval between the upper and lower injection ports is increased. Further, if the cement slurry having a long gelation time actually escapes to the surface of the ground during the injection, it is easy to be consolidated instantaneously to prevent the escape, and the injection of the cement slurry having a long gelation time is continuously performed. (Means for Solving the Problem) In order to solve the above problems, the ground object injection device according to the present invention is characterized in that it includes an outer tube, and the tube is inserted into the hole of the ground plate, and has a rubber sleeve on the outer g a plurality of outer tube discharge ports covered by the tube; and an inner tube, the inner tube is movably inserted into the outer tube, and three or more fluids are filled at intervals in the outer length direction a diverging and sealing device that is swelled and swelled freely; the inner tube is independently provided with a plurality of injection liquid flow paths for feeding the injection liquid, and introducing the fluid into the expansion and contraction sealing device a plugging flow path that expands or discharges a fluid to contract it; when the fluid is filled into the expansion and contraction sealer to expand it, a plurality of expansion and contraction sealers are formed between the adjacent expansion and contraction sealers a discharge position; the discharge port of the injection liquid flow path is positioned at each discharge position, and the discharge position is overlapped with the outer tube discharge port, and then the fluid is introduced into the three or more expansions through the plug flow path. Shrinking inside the sealer Expanded, and in the gap sandwiched by the adjacent expansion and contraction sealers, -10- (7) 1262228 forms the inner space of the tube, and then the injection liquid is discharged from the discharge port through the inner space of the tube and the outer tube · Inject into the site. Further, in order to solve the above problems, according to the method of injecting a ground plate according to the present invention, an outer tube is inserted into a hole formed in a ground plate to be improved, and the outer tube is covered with a rubber sleeve on an outer wall thereof. a plurality of outer tube spouts; in the other tube, the inner tube is movably inserted, and the inner tube is installed with three or more expansion and contraction seals at intervals in the outer longitudinal direction thereof, and adjacent to each other The expansion and contraction sealing device is disposed between the expansion and sealing positions, and the inner portion of the inner tube is independently formed: a plurality of injection liquid flow paths whose discharge ports are located at the respective discharge positions, and the fluid is introduced into the expansion and contraction sealing hole a plug-in flow path that expands or discharges a fluid to shrink the inside of the device; and after the discharge position is overlapped with the outer tube discharge port, the fluid is introduced into the three or more expansion and contraction through the plug flow path. Inside the sealer, the expansion and contraction sealer is expanded, thereby forming a space inside the tube in a gap sandwiched by the expansion and contraction sealers adjacent to each other, and then passing the injection liquid from the discharge port through the tube Inner space and outer tube The outlet is injected into the ground plate; then, the fluid is discharged from the expansion and contraction sealer to shrink the expansion and contraction sealer, and the inner tube is moved to make the discharge position coincide with the other outer tube discharge port, and after moving the injection level layer, The expansion and contraction plug is expanded to form a space inside the tube, and the operation is repeated in the same manner, and the injection liquid is injected into the ground. Further, in order to solve the above problems, according to the method of injecting a ground plate according to the present invention, it is characterized in that an outer tube is inserted into a hole formed in a ground plate to be improved, and the outer tube is in the outer tube of the -11 - (8) 1262228 The outer wall has a plurality of outer tube discharge ports covered by the rubber sleeve; and the inner tube is movably inserted into the inner tube, and the inner tube is installed with a pair of expansion and contraction seals at intervals in the outer longitudinal direction thereof. And the two expansion and contraction sealers are set as the discharge position, and inside the inner tube, respectively, are formed separately: the plurality of injection liquid flow paths whose discharge ports are located at the respective discharge positions, and the fluid a plug-in flow path that is introduced into the expansion and contraction sealer to expand or discharge the fluid to shrink; after the discharge position is overlapped with the outer tube discharge port, the fluid is introduced into the pair through the plug-in flow path Expanding and shrinking the inside of the hole sealer to expand the expansion and contraction sealer, thereby forming a space inside the tube in a gap sandwiched by a pair of expansion and contraction sealers, and then passing the injection liquid from the discharge port through the tube Inner space and outer tube spit, injecting ground Then, the fluid is discharged from the expansion and contraction sealer to shrink the expansion and contraction sealer, and the inner tube is moved, so that the discharge position coincides with the other outer tube discharge ports, and the injection level layer is moved, and then the expansion and contraction are performed. The plugging device is expanded to form a space inside the tube, and the operation is repeated in the same manner, and the injecting liquid is injected into the ground plate. [Effects of the Invention] The present invention described above exerts the following effects. (1) When the ground is uniform, if the A liquid and the B liquid of the same injection liquid are simultaneously injected, the injection layer can be injected twice as long as the normal injection length, and the construction efficiency is doubled. (2) When the site is composed of a complex formation, 'the liquid A is made into a suspended cement slurry, the liquid B is made into a solution type cement slurry; or the cement slurry with poor permeability is set to the A liquid, and the permeability is good. The cement solution is set to B liquid 'in -12- (9) 1262228, and the cement slurry having a short gelation time is set to liquid A, and the cement slurry having a long gelation time is set as liquid B, and these A are When the B liquid is simultaneously injected from the two inner spaces of the tube and the inner tube is pulled up, and the injection level layer is moved and injected, the injection of the liquid B into the area where the liquid A has been injected can not only double the construction efficiency. Injecting with a water-stopping effect in a region where the strength is consolidated is capable of simultaneously performing high-strength ground plate improvement and water stop improvement. When the A liquid and the B liquid having different gelation times are simultaneously injected from the two discharge positions, that is, from the two injection level layers, respectively, the flow meter independently provided in each of the injection liquid flow paths is used. The pressure gauge and the injection pump perform injection management, and the most appropriate injection can be performed in accordance with the ground conditions or the purpose of injection. This injection is suitable for applications where the ground is made up of complex formations. In this case, the construction speed is also doubled. Further, in the case of a ground plate in which a coarse soil layer and a fine soil layer are alternately laminated, the liquid A is made into a suspended cement slurry or a cement slurry having a short gelation time, and the liquid B is set to have a long gelation time. The solution type cement slurry moves the discharge position, and injects the A liquid into the coarse soil layer while changing the injection level layer, injects the B liquid into the fine soil layer, or injects the soil layer which has been injected into the A liquid, and injects it into the liquid B in an overlapping manner. In this way, the suspended cement slurry is used for the high-strength ground improvement, and the solution-type cement slurry is used for the infiltration of the soil particles, and the simultaneous treatment of the consolidation and the water stop can be performed. (3) The liquid A is used as a water glass solution, and the liquid B is a reactive aqueous solution. The A and B liquids are injected while moving the injection level layer, and the liquid B is injected into the area where the liquid A has been injected to make the liquid A. , liquid B in the ground anti--13- (10) 1262228 should. In this case, the ground plate can be modified to solve the disadvantages such as water glass and calcium chloride aqueous solution, although high strength can be obtained, but it is difficult to penetrate due to instantaneous consolidation. That is, the water glass is made to permeate into the ground plate as the liquid A, and the water glass is not lost to the outside, that is, when the water glass is filled in the gap between the soil particles, the calcium chloride is added. The aqueous solution is injected in an overlapping manner, and water glass and calcium chloride react between the soil particles, and can be consolidated in a wide range. In this way, it is possible to simultaneously inject or alternately inject the A liquid and the B liquid in accordance with the ground conditions or the purpose of the injection using the injection liquid. This is because the A liquid and the B liquid can be injected into the ground from each of the plurality of outer tube discharge ports through the independent injection liquid flow path. Therefore, not only the injection process can be doubled or more, but the most suitable one can be performed according to the ground conditions. injection. (4) The A and B injection liquids are simultaneously injected from the discharge positions (implantation level layers) adjacent to each other, and the upper and lower injection liquids are restrained from each other and uniformly permeated in the horizontal direction; therefore, the predetermined shape is saturated and consolidated. It becomes possible. If the first layer is implanted in the first layer, the injection liquid from the initial injection level layer will go ahead and saturate to the area where the adjacent injection level layer is responsible, and consolidate, resulting in injection from the subsequent injection level layer. At the time of injection, the injection becomes difficult; or the shape of the injection becomes irregular, and thus the injection of the prescribed consolidated shape becomes difficult in the prescribed space. (5) Where the earth pressure is increased, the injection depth is increased, or the injection pipe is provided in the horizontal direction, the outer pipe is easily deformed, and the movement of the inner pipe becomes difficult, by using the expansion seal The hole device, if the expansion and contraction sealer is contracted, the movement becomes easy. In the past, the rubber ring was used in place of the expansion and contraction sealer -14 - 1262228 Μ1 ). In this case, since the sealer function utilizes the friction between the rubber ring and the outer tube, in particular, in the case of using a rubber ring sealer of three or more stages, the friction becomes large and the movement of the inner tube is difficult. (6) When an elastic rubber ring is used without using a shrink-sealing sealer, the gel of the A and B mixed liquids is filled in the inner space of the tube; in this case, the inner tube must be pulled up to clean the inner space of the tube. On the other hand, when the expansion sealer is used, after the A and B mixed liquids are injected, the expansion and contraction sealer is contracted by interrupting the pressure feed of the fluid from the plug flow path, and the inside of the tube becomes condensed. The injection of glue will fall below the outer tube and be removed. Alternatively, the gel is discharged to the ground by the water supplied from the injection flow path. In either case, it is not necessary to pull up the inner tube to clean it as is conventional. (7) in the case of water glass and calcium chloride, a solution that is instantaneously consolidated by mixing, in which water glass is first poured, and then calcium chloride is alternately injected into the ground plate, if the expansion and contraction sealer is contracted, After the water glass remaining in the inner space of the tube is excluded from the outer tube or after the water is washed, the plugging device is expanded, and then the calcium chloride is sent to the liquid, the two liquids do not react in the inner space of the tube, but The reaction was carried out in the construction site. (8) When the site is uniform, the same a and B liquids are simultaneously operated by a plurality of pumps by using one driving body, and the other flow paths are used only by the pump and the flow meter provided in one flow path. The pressure and flow are considered to be about the same, for management, and the construction is simplified and efficient. (9) When the site consists of a complex formation, the same injection solution or A and B liquids with different gelation times are injected simultaneously from the two internal spaces, -15-(12) 1262228 . In this case, these injection management can perform injection of the optimum injection speed, injection pressure, and injection amount by a flow meter, a pressure gauge, and an injection pump which are independently provided in the respective lines. [Embodiment] BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail using the attached drawings. 1 is an explanatory view of a device of a specific example of the present invention, FIG. 2 is a cross-sectional view of an actual device of FIG. 1, and FIG. 3 is an explanatory view of a device of another specific example of the present invention, and FIG. 3 is a cross-sectional view of an actual device, and FIG. 5 is an explanatory view of another injection system of the present invention. The apparatus of the present invention shown in Figs. 1 and 2 is basically constituted by an outer tube 7 and an inner tube 10. The outer tube 7 has, on its outer wall 3, a plurality of outer tube discharge ports 17, 17·..17 covered by a rubber sleeve 16. The inner tube 10 is configured to be movably inserted into the outer tube 7, and three or more expansion and contraction seals that are expanded and contracted by fluid filling and discharging are attached at intervals in the outer longitudinal direction thereof. Holes 8, 8 ... 8 . Inside the inner tube 1 ,, each of the plurality of injection liquid flow paths 1 2 and 1 2 is supplied separately from the injection liquid; and the fluid is introduced into the expansion and contraction sealing device 8 to be expanded or fluidized. The plugging flow path 13 is discharged and contracted. Moreover, when the expansion and contraction sealer 8 is expanded by the filling of the fluid, it is configured to form a plurality of discharge positions 9, 9...9 between the adjacent expansion and contraction sealers 8, 8...8, and the injection flow The discharge ports 1 1 and 1 1 of the roads 1 2 and 1 2 are respectively located at these discharge positions 9, 9 ... 9 . -16- (:13) 1262228 When the apparatus of the present invention described above is to be implemented, first, the outer tube 7 is inserted into the hole 2 of the ground plate 1, and then the inner tube I is movably inserted into the outer tube 7. Further, after the discharge positions 9 and 9 are overlapped (cooperated) with the outer tube discharge ports 17, 17 7...1, the fluid is introduced into the three or more expansion and contraction seals 8 and 8 through the plug flow path I 3 . ...8, the expansion and contraction seals 8, 8...8 are expanded' by which the inner space 1 5 ' is formed in the gap 14 which is sandwiched by the mutually adjacent expansion and contraction seals 8, 8 ... 8 Further, the injection liquid is injected into the ground plate 1 from the discharge port 1 through the inner space 丨5 and the outer tube discharge ports 1 7 and 17 (...). Further, in the above-described apparatus of the present invention, the fluid is discharged from the expansion and contraction sealers 8, 8, 8 and the inner tube 1 is moved, and then the discharge position 9 is overlapped with the other outer tube discharge ports 17 to move the injection stage. The layers are then expanded by the expansion and contraction seals 8, 8...8 to form the internal spaces 1 5 and 15 , and the operation is repeated in the same manner to inject the injection liquid into the ground 1 . Further, according to the present invention, as shown in Figs. 1 and 3, it is also possible to fill the space 6 between the outer wall of the outer tube 7 and the hole-reducing wall 5 with the closed grout 4, and then break the sealant into the cement slurry. 4 is injected into the site 1. Using the apparatus of the present invention described above, the ground casting method of the present invention is constructed as follows. First, as shown in Fig. 1, a hole 2 is formed in the ground 1 to be improved. Next, the outer tube 7 is inserted into the cut hole 2, and the closed grout is filled in the space 6 between the outer wall of the outer tube 7 and the cut hole wall 5 of the cut hole 2. The outer tube 7 has, on its outer wall, a plurality of outer tube discharge ports 1 7 , 1 7 ... 1 7 covered by a rubber sleeve 16. Further, the inner tube 1 is movably inserted into the outer tube 7. -17" (14) 1262228 tube 1 〇, in the longitudinal direction of 'three or more expansion and contraction seals 8, 8 ... 8 are spaced apart to form a plurality of ejection positions 9 to form Two consecutive ejection positions 9, 9 in Figures 1 and 2. Further, in the inner tube 1 ,, a plurality of injection liquid flow paths 1 2 and a plug flow path 13 are independently provided. The injection flow path 12 has its discharge port 1 located at each of the discharge positions 9, 9 and supplies the sputum and the sputum to the discharge ports 1 1 and 1 1 of the respective discharge positions 9, 9. Further, the sealer flow path 13 has its discharge port 1 3 a located in each of the expansion and contraction sealers 8, and the expansion and contraction sealer 8 is expanded or contracted by the discharge port 1 3 a. The plugging fluid is a fluid such as air 'inactive gas, water, etc., and the sealer fluid is introduced into the expansion and contraction sealer 8 to be expanded to form a pair of expansion and contraction sealers 8, 8. As a result, in the gap 14 of the outer tube 7 and the inner tube 10, the inner space 15 of the tube which is sandwiched by the expanded pair of expansion and contraction seals 8, 8 is formed. Further, reference numeral 18 is a liquid A tank, and reference numeral 19 is a liquid B tank; and a pump is disposed in the conduits 23 and 23 of the injection liquid flow path 12 that communicates from the storage tanks 18 and 19 to the inner tube 1 20. Flow meter 21 and pressure gauge 22. Further, the plugging passage 13 has a discharge port 13 3 located in each of the expansion and contraction sealers 8, and introduces a fluid such as air or water into the expansion/contractor 8 to expand it to form three or more. Expansion and contraction sealer 8. As a result, in the gap 14 of the outer tube 7 and the inner tube 10, two or more continuous sheets which are sandwiched by three or more expansion/contraction sealers 8, 8 ... adjacent to each other are formed. The inner space of the tube is 1, 5, and 15. The present invention formed by the above configuration is such that the injection liquid is discharged from the discharge port 1 of the injection liquid flow path 12, through the inner space of the tube, and the outer tube discharge port -18-(15) 1262228 1 7 1 7 ... 1 7, injected into the site 1. Next, the fluid is discharged from the expansion and contraction sealers 8'8...8 to contract the expansion and contraction sealers 8, 8...8: in this state, for example, the inner tube 10 is moved upward to make the discharge position. 9, 9 coincides with the other outer tube discharge ports 1 7 , 1 7...1 7 , and after moving the injection level layer, the fluid is again filled into the expansion and contraction sealers 8 , 8 ... 8 to expand and form The inner space of the tubes 1 5 and 15 is similarly repeated, and the injection liquid is injected into the ground plate 1. Symbols 24 in Figures 2 and 4 are flexible tubes. Further, in Figs. 3 and 4, a pair of expansion and contraction sealers 8 and 8 are provided, and therefore, the discharge position 9 is one. In this case, the discharge position 9 is overlapped with the two or more outer tube discharge ports 17 and 17; then, the fluid is introduced into the pair of expansion and contraction seals 8 and 8 through the sealer flow path 13 to be inflated. The shrink sealers 8, 8 are expanded, whereby the inner space 15 is formed in the gap 14 which is sandwiched by the pair of expansion and contraction seals 8, 8. Further, the A and B liquids are caused to pass through the inside of the pipe space 15 and the outer pipe discharge port 17 from the discharge ports 11 and 1, and the rubber sleeve 16 is opened, thereby breaking the cement slurry 4 and injecting it into the ground plate 1. Further, the expansion and contraction sealers 8, 8 are contracted, for example, the inner tube 1 is moved upward to move the injection level layer, and then the expansion and contraction sealers 8, 8 are again inflated to form the inner space of the tube, and In the same manner as described above, the injection liquid is injected into the ground plate 1 through the tube inner space 15 and the outer tube discharge ports 17 and 17, from the discharge ports 1 1 and 1 , and the injection is repeated. In the above-described invention, even if the hole-cutting wall 5 collapses, the injection liquid is pressed into the ground disk from the plurality of discharge ports 11, 11 through the independent injection flow paths 2, 2, 2 by separate pumps. Therefore, the injecting liquid pushes the collapsed sand and is injected into the respective sharing areas, and can be turned into a long columnar immersion -19-(16) 1262228. Furthermore, Figure 5 is a table injection system. In the case of Fig. 5, by using the A liquid storage liquid A and the B liquid, the use of the operation is simplified, and the construction is simplified. The same effect as in Fig. 2 and Fig. 4 is similarly applied to the case where the A liquid and the B liquid are injected in different times, and the flow meter 21 in the 12 and 12 is used for management, and the corresponding ground condition is entered. Further, a fine soil layer or a liquid is injected while changing the injection level layer by using the first earth soil and the fine soil layer to form a suspended cement slurry or a solution having a long gelation time. In this way, the simultaneous treatment of the solution type cement slurry and the water stop by the suspension type is used, and the first embodiment is shown in Fig. 1 showing the injection liquid having a structure different from that of Figs. 1 and 3, as described above, at the site 1 Uniform _ 18, the same injection-drive body in the B liquid storage tank 19, so that a plurality of pumps simultaneously move the pump 20 in the conduit 2 3 and the flowmeter pressure and flow rate are regarded as about the same, and then Efficient. The injection device can be independently provided from the two discharge positions 9 and 9 in the respective injection flow paths/pressure gauges 2, in addition to being able to achieve the gelation by using the device in addition to the third figure. 2. Injecting the pump 20 to perform the injection and injection purposes, and the most appropriate drawing and the injection device of the second drawing can be performed to inject into the coarsely laminated substrate 1 to make the A gelation time short. Cement purple, set B liquid cement slurry, move the spray position 9, 9, inject the A liquid into the coarse soil layer, the b liquid will be injected into the soil layer of the A liquid, and inject the b cement award to the commercial strength site. Improvement, infiltration of soil particles, can be carried out, and the injection device of Fig. 2, by soaking water glass-20-(17) 1262228 glass as liquid A into the ground plate 1, and re-injecting chlorine as liquid B Calcium, water glass and calcium chloride react between soil particles and can be consolidated over a wide range. It is also possible to simultaneously inject the sputum and the sputum; or to repeat the operation of the squeezing and sealing device 8, and to inject the liquid A and the liquid B separately: and further, it is also possible to alternately inject the liquid A while moving the layer. The liquid B is reacted in the ground. Further, the ground injection process of the present invention will be specifically described with reference to the drawings, as will be described below. First, when the hole 1 is formed in the ground 1 ' to be improved, when the hole is to be cut, a conventional conventional hole cutter is used. Next, the tube 7 having the outer tube discharge ports 1 7 and 1 7 ... 1 7 covered by the rubber sleeve 16 is inserted into the hole 2. Next, the closed cement slurry 4 is filled in the space 6 between the outer wall of the outer tube 7 and the hole-cut wall 5 of the hole 2. As a result, the outer tube 7 is fixed in the cut hole 2 while the ground plate 1 is also reinforced. Further, the inner tube 1〇 is inserted into the outer tube 7. The inner tube 10 is configured such that a pair of three or more expansion and contraction seals 8, 8 are disposed at intervals in the outer longitudinal direction thereof to form one or two or more discharge positions 9, respectively Independently, a plurality of injection liquid flow paths 1 2 for discharging the injection liquid to the inner side, the discharge port 1 1 at each discharge position 9 , and a seal for introducing the fluid into the expansion/contraction seal 8 and expanding the same The orifice flow path 13 3; further, the fluid is introduced into the one or more expansion/contractors 8 and 8 through the sealer flow path 13 to be expanded, and the expansion and contraction seals adjacent to each other The gap 14 sandwiched by the holes 8, 8 forms an inner space 15 of the tube. Moreover, when the expansion and contraction seal 8 is inflated, the inner tube! The crucible is fixed in the outer -21 - (18) 1262228 tube 7; and when the expansion and contraction seal 8 is contracted, the inner tube 10 can move freely inside the inner tube 10. The discharge position 9 of the inner tube 1 配合 is fitted to the outer space 6 of the tube, and then the injection liquid 'discharges from the injection liquid flow path 1 2 '] through the inner space of the tube 5 and the outer tube discharge port 17 to break the closed cement. The slurry 4 is injected into the ground plate 1. Each of the injection liquid flow paths 1 2 and 1 2 is in communication with each of the A liquid storage tanks 18 and B liquid storage tanks 1 9 , and is adjusted by the pressure gauge 2 2 and the flow meter 2 1 by the operation of the pump 20 . Make the most appropriate injection. 0 (Industrial Applicability) In the present invention, not only the injection process is accelerated by a factor of two or more, but in particular, the most appropriate injection can be performed in accordance with the condition of the disk or the purpose of the injection, and the space outside the columnar tube is increased. Since the injection liquid is horizontally saturated with each other in the horizontal direction, it is highly likely to be utilized in the field of ground injection technology. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a model diagram of a specific example of the apparatus of the present invention. Fig. 2 is a cross-sectional view showing the actual device of Fig. 1. Fig. 3 is a model diagram of another specific example of the apparatus of the present invention. Figure 4 is a cross-sectional view of the actual apparatus of Figure 3. The first: > diagram is a model diagram of the injection system of the present invention. [Main component symbol description] -22- 1262228 ι19) 1 : Site 2 : Shaping hole 3 : Outer wall 4 : Closing cement slurry 5 : Shaping hole wall 6 : Space 7 : Outer tube
8 :膨縮封孔器 9 :噴出位置 1 0 :內管 1 1 :吐出口 12 :注入液流路 1 3 :封孔器流路 1 3 a :封孔器流體吐出口 1 4 :間隙8 : Expansion and sealing device 9 : Discharge position 1 0 : Inner tube 1 1 : Discharge port 12 : Injection flow path 1 3 : Sealer flow path 1 3 a : Sealer fluid discharge port 1 4 : Clearance
1 5 :管內空間 1 7 :外管吐出口 -23-1 5 : In-tube space 1 7 : Outer tube spout -23-