WO1987003319A1 - Procede et agencement permettant le controle et le suivi de l'etendue de la zone d'injection lors de l'injection par jet dans le sol d'un liant polymerisable - Google Patents

Procede et agencement permettant le controle et le suivi de l'etendue de la zone d'injection lors de l'injection par jet dans le sol d'un liant polymerisable Download PDF

Info

Publication number
WO1987003319A1
WO1987003319A1 PCT/NO1986/000078 NO8600078W WO8703319A1 WO 1987003319 A1 WO1987003319 A1 WO 1987003319A1 NO 8600078 W NO8600078 W NO 8600078W WO 8703319 A1 WO8703319 A1 WO 8703319A1
Authority
WO
WIPO (PCT)
Prior art keywords
jet
injection
pilot hole
water
curable binder
Prior art date
Application number
PCT/NO1986/000078
Other languages
English (en)
Inventor
Lars O^/ivind HOKSRUD
Original Assignee
Hoksrud Lars Oeivind
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoksrud Lars Oeivind filed Critical Hoksrud Lars Oeivind
Publication of WO1987003319A1 publication Critical patent/WO1987003319A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/18—Bulkheads or similar walls made solely of concrete in situ
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil

Definitions

  • the present invention relates to a method for control and
  • the invention furthermore, relates to an arrangement of the 15 above mentioned jet injection head for carrying out said method, and as stated in the introductory part of the follow ⁇ ing dependent claim 4.
  • Jet injection is a method for sealing off and strengthening
  • This method involves loosening the soil structure by the aid of a high pressure water beam sur ⁇ rounded by air (jet beam), at the same time as a binder, commonly cement grout, is injected. Said binder will displace the loosened material (slurry) flowing up to the surface.
  • a binder commonly cement grout
  • Jet injecting can be carried out in all soils the grain
  • jet injection finds a large range of application and utilization of this method may be listed in three main areas:
  • Strengthening of the soil Injection is carried out beneath existing or new foundations, commonly in the shape of piles.
  • Stabilization of soil Temporarily or permanently, often in conenction with building and construction work.
  • This method will be especially advantageous in connection with necessary foundation work on older buildings since such work may be carried out in a precise and considerate manner and with a minimum of space needed.
  • rapidly curing cement may be used.
  • cement may be mixed with bentonite.
  • Panels with a thickness from 5 ti 10 cm in cohesive soils, and from 15 to 30 cm in frictional soils.
  • ⁇ T to be very irregular and rugged. This is due to local variations of homogeneity and of the compactness of the soil.
  • the homogeneity of the injection zone depends on how well the injected agent will mix with the original soil. In frictional soils where there is no adherence between grains, the grainy structure is readily broken down by jet washing, and intimate mixing with the injected agent is achieved. In such material the homogeneity will, thus, normally be good. Pebbles not being thrown up through the pilot hole during jet injection will stay in the injection zone. Larger rocks will not in ⁇ fluence the quality of the injection zone if homogeneity is otherwise satisfactory.
  • the homogeneity of the injection zone will be more variable. Especially in soils having a high clay content. Previously, it was not possible to break down the structure of the soil completely by the aid of the jet, and portions of clay would stay intact in the shape of large and small lumps. The lumps not driven up to the surface via the pilot hole will become embedded in the injection zone. * The content of such lumps of clay will reduce the quality of the injection zone, i.e. the final hardened body of binder and broken dowm components from the soil.
  • Coring comprises removal of core samples from the injection zone.
  • a common diameter is 50 mm and the samples are, as a matter of routine, taken from the centre of the piles and 80 cm outwards from the centre, in all three core samples from each test pile.
  • the advantage of this method is that samples are taken from the injection zone for control and further examination. Coring is obviously a complicated and expensive method and, additionally, it is doubtful whether core samples are representative of the quality of the injection zone. Examinations of the strength of jet injected soil should, in fact, be made with the largest possible samples.
  • the present invention also provides an arrangement in connect ⁇ ion with a jet injection head for use when the above method is carried out, and said arrangement is achieved by the features appearing from the characterizing part of the following arrangement claim 4 and the following claims.
  • Control of the extend of an injection zone across its longi ⁇ tudinal direction is, thus, achieved by the aid of ultrasonic waves.
  • an emitter, a re-ordinatever, a digital indicator, a printer, and an electro- acoustic converter provided in said injection head with the water nozzle, and the cement nozzle the extent of the inject ⁇ ion zone may be determined.
  • Said electroacoustic converter a so called oscillator
  • Said electroacoustic converter will emit ultrasonic signals which are reflected from the wall of said injection zone, and are received by the receiver.
  • the velocity of reflection depends on the solidity of the medium in the wall of said injection zone.
  • Said signals are process- ed to form a continuous graphic representation of the shape and extent of the pile simultaneously with the running injection operations.
  • Jet injection parameters e.g. pressure, water/ cement ratio and lifting velocity of said jet injection head may be adjusted during operations to provide for the prescrib ⁇ ed pile diameter and to avoid variations of homogeneity, e.g. "lenses", lumps, etc. in the produced jet pile.
  • Figure 1 shows a jet injection head with a rod having three passages and a swivel joint with connections for said passages and a display conencted with said injection head
  • Figure 2 shows a collar/container surrounding said rod with three passages of said jet injection head, with a mump and a flowmeter
  • Figures 3a, b, c show an example of production of jet piles
  • Figures 4a,b,c show an example of production of panels (shields) .
  • a jet injection head A comp ⁇ rises an uupper nozzle 11 for a jet of water surrounded by air, and a lower nozzle 13 for injection of a curable binder.
  • Jet injector head A is provided at the end of a rod 16 having three passages for supply of highpressure water, compressed air, and a curable binder under pressure to said nozzles 11 and 13, respectively.
  • emitter/ receiver equipment 12 is provided and is connected with signal processing equipment, and a display 14 via a line 14a.
  • Jet injection head A has excavating claws 17 provided in a ring at the lower portion of said head, and having an ex ⁇ ternal ring diameter which is larger than that of the jet injection head A.
  • Jet injection head A with rod 16 is placed in a pilot hole P indicated with dotted lines. The lower portion of said hole is enlarged to an injection zone I by jets of water and air from top nozzle 11 during rotation and lifting of said jet injection head A.
  • FIG 2 a combined collar and container 4 is shown. It is intended for surrounding rod 16 of jet injection head A at the upper end of pilot hole P for collection of liquid matter flowing up to and out of pilot hole p during- production of injection zone I by jet treatment and simultaneous injection of binder.
  • a pump 2 is pro ⁇ vided and is connected with the interior space of container 4 by the aid of a diver 3.
  • Pump 2 is, furthermore, provided with a flow meter 1 for measuring the liquid matter conveyed by said pump.
  • the liquid matter flowing out of the upper end of pilot hole P can, thus, be measured as regards volume and, if desired, as regards composition as well, for controlling the composit ⁇ ion and volume of material of the carrying or supporting structure K.
  • Figure 3a shows drilling of a pilot hole P by the aid of excavating blades 17 of jet injection head A, rod 16 of jet injection head A, which rod may be compared to a drill pipe, being attached to a drill tool feeder 18 on a vehicle 19.
  • Said pilot hole e.g. having a diameter of approximately 150 mm is drilled down to the desired level of the bottom of a pile.
  • the bore hole walls may, if desired, be stabilized by a casing or a heavy liquid.
  • Figure 3b Injection head A is then slowly lifted upwards being simultaneously rotated, and with top nozzle 11 working the wall of pilot hole P with a jet of water surrounded by air to extend said pilot hole so as to form an injection zone with a larger diameter, and with simultaneous injection of an agent, e.g. in the form of cement and water, through lower nozzle 13 to fill up injection zone I.
  • an agent e.g. in the form of cement and water
  • water and air will, thus, under high pressure break down the grainy structure and loosen the soil to a distance fron the centre of pilot hole P simultaneously with said injection agent being injected into the broken down volume of soil which is, thus urged upwards through pilot hole P.
  • Figure 3c shows continued lifting and rotation of jet inject ⁇ ion head A with simultaneous jet washing with water and air under high pressure, as well as injection of binder.
  • Liquid matter will continue to flow up through pilot hole P to the surface.
  • This liquid flowing matter consists of soil, water, and some cement. It may be collected in a sedimentation basin, or it may be collected in containers to be removed.
  • the liquid matter is removed via collar/container 4, shown in Figure 2, a portion 7 of said collar depending from container 4 extending into pilot hole P or a casing inside said hole for collecting the -liquid matter flowing upwards.
  • Said liquid matter may be conveyed by pump 2 provided on container 4 with simultaneous measuring by the aid of flow meter 1.
  • piles having a diameter of approximately 0.8 -4 m may be produced, depending on the kind of soil and the process, and this may be carried out during continuous monitoring via said graphic representation on display 14 showing the width of injection zone I in relation to the centre of pilot hole P.
  • FIGs 4a, b, and c the procedure of building panels (shields) is shown.
  • Said procedure has several features in common with the procedure of building piles, as shown in Figure 3.
  • This procedure can also be divided into three phases, i.e. A: Drilling of several pilot holes P, e.g. with a dia ⁇ meter of 150 mm along a desired direction of the panel to be produced in the soil. The distance between pilot holes is adapted to the conditions of the soil, and may vary between 0.5 and 3 m. After drilling said pilot holes by the aid of a special drill steel and drill ring, if desired,by the aid of jet injection head A with excavation blades 17, said jet injection head A is lowered in a first pilot hole P.
  • pilot holes P e.g. with a dia ⁇ meter of 150 mm along a desired direction of the panel to be produced in the soil.
  • the distance between pilot holes is adapted to the conditions of the soil, and may vary between 0.5 and 3 m.
  • Jet injection head A is oriented with nozzle 11 for water/air jet towards adjacent pilot hole P. While jet injection head A is slowly pulled up the soil between said two adjacent pilot holes P is washed off with simultaneous injection of binder into the formed injection zone I.
  • the formed liquid matter or slugde consisting of water and washed out soil matter, and some binder will rise through adjacent pilot hole P to the surface and may be collected as mentioned above.
  • Said sludge may, if desired, be collected in a collar/container 4 which is provided in the mouth of said pilot hole P, to be measured and removed. In this case the through collar portion 7 must be closed at its upper opening provided with a gasket 6.
  • B Thus, a panel or a shield is erected between said two adjacent pilot holes P.
  • Such jet panels 20 will have a thickness in an order of 5-30 cm and a width varying from 0.5 m to 3 m. Their height is adapted to the requirements, depending on the soil and the design. Such panels need not be completed up to the sur ⁇ face of the site but may, if desired, be limited between two levels below the surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

Procédé et dispositif permettant le contrôle et le suivi de l'étendue d'une zone d'injection dans le sens longitudinal lors de l'injection par jet d'un liant polymérisable dans des sols sur site afin de réaliser des structures portantes ou de support, par exemple des piles, piliers, panneaux, boucliers, de préférence en ciment, au moyen d'une tête d'injection par jet (A) montée sur une tige et comportant un ajutage supérieur (11) délivrant un jet d'eau entouré d'air, et un ajutage inférieur (13) destiné à l'injection dudit liant polymérisable. La tête d'injection par jet (A) pourvue de lames d'excavation (17) est utilisée pour creuser un trou pilote (P) dans le sol. Tandis que l'on soulève lentement et que l'on injecte un jet d'eau/air, le sol du trou pilote (P) se désagrège et ledit trou s'agrandit pour devenir une zone d'injection (I) de plus grande section transversale. Ledit liant polymérisable est injecté via l'ajutage (13). Un émetteur récepteur (12) situé entre les ajutages (11 et 13) émet et reçoit des signaux qui sont réfléchis par les parois de la zone d'injection (I). Les signaux réfléchis traités fournissent une représentation graphique en continu sur un affichage (14) de la forme et de l'étendue de la zone d'injection (I) et, ainsi, de la structure portante ou de support (K) formée au cours de l'opération d'injection.
PCT/NO1986/000078 1985-11-25 1986-11-25 Procede et agencement permettant le controle et le suivi de l'etendue de la zone d'injection lors de l'injection par jet dans le sol d'un liant polymerisable WO1987003319A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO854710 1985-11-25
NO854710A NO854710L (no) 1985-11-25 1985-11-25 Fremgangsmåte for kontroll og styring av injeksjonssonens utstrekning ved jetinjisering av herdbart bindemiddel i jordarter, samt anordning for gjennomføring av fremgangsmåten.

Publications (1)

Publication Number Publication Date
WO1987003319A1 true WO1987003319A1 (fr) 1987-06-04

Family

ID=19888607

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1986/000078 WO1987003319A1 (fr) 1985-11-25 1986-11-25 Procede et agencement permettant le controle et le suivi de l'etendue de la zone d'injection lors de l'injection par jet dans le sol d'un liant polymerisable

Country Status (3)

Country Link
EP (1) EP0247135A1 (fr)
NO (1) NO854710L (fr)
WO (1) WO1987003319A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0349789A2 (fr) * 1988-07-05 1990-01-10 KELLER GRUNDBAU GmbH Méthode et dispositif pour assainir des sites contaminés
DE4235378A1 (de) * 1992-10-16 1994-04-21 Bohrlochzementierung Geo Techn Verfahren und Anordnung zur Erosionsinjektion in Erdstoffen
DE19521639A1 (de) * 1995-06-14 1996-05-02 Bilfinger Berger Bau Verfahren zur Überwachung eines HDI-Verfahrens
EP0699888A3 (fr) * 1994-08-23 1997-05-07 Keller Grundbau Gmbh Détermination du diamètre ou de l'épaisseur d'éléments d'une paroi
DE19731223A1 (de) * 1997-07-21 1999-02-18 Keller Grundbau Gmbh Vorrichtung und Verfahren zum Ermitteln der Wirkweite eines Hochgeschwindigkeitserosionsverfahrens in einem Baugrund
NL1010967C2 (nl) * 1998-01-06 1999-10-07 Visser & Smit Bouw Bv Werkwijze voor het meten van de gesteldheid van een in de grond gevormd element, zoals een jetgroutkolom, alsmede meetapparaat daarvoor.
DE10064187C1 (de) * 2000-12-22 2002-05-08 Keller Grundbau Gmbh Vorrichtung zum Messen des Durchmessers von im Boden mittels eines Düsenstrahlverfahrens hergestellten Stütz- oder Wandelementen
EP0940559A3 (fr) * 1998-03-06 2002-09-25 Stephan Eberhard Bruder Dispositif et procédé pour mesurer le diamètre d'un corps obtenu dans le sol par injection à haute pression
DE10113804A1 (de) * 2001-03-21 2002-10-02 Keller Grundbau Gmbh Vorrichtung zum Messen des Radius bzw.Durchmessers von Hohlräumen
EP1795655A1 (fr) * 2005-12-07 2007-06-13 Tecsoil S.R.L. Procédé d'amélioration du sol utilisant le jet grouting, permettant d'importantes économies de matériel d'injection
DE10313912B4 (de) * 2003-03-27 2007-07-12 Keller Grundbau Gmbh Vorrichtung zum Bestimmen des Durchmessers bzw. Radius von Hohlräumen
RU2461682C1 (ru) * 2011-02-24 2012-09-20 Владимир Яковлевич Шишкин Способ определения параметров колонн, возводимых в грунте методом струйной геотехнологии
RU2528329C2 (ru) * 2012-01-31 2014-09-10 Бауэр Шпециальтифбау ГмбХ Способ и установка для сооружения элемента траншейной стены
RU2771738C1 (ru) * 2020-11-24 2022-05-11 Акционерное общество "ВолгоградНИПИнефть" Ультразвуковой анализатор цемента

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961683A (en) * 1972-06-22 1976-06-08 Institut Francais Du Petrole, Des Carburants Et Lubrifiants Method for determining the shape of an underground cavity and the position of the surface separating two media contained therein and device for carrying out said method
GB1558694A (en) * 1977-08-10 1980-01-09 Kajima Corp Consolidation of underground masses
SE433639B (sv) * 1977-12-27 1984-06-04 Kajima Corp En anordning for injicering av cementmjolk i jord under markytan
US4542488A (en) * 1982-07-22 1985-09-17 Mobil Oil Corporation Method and system for producing a PPI display
GB2158486A (en) * 1984-05-09 1985-11-13 Nit Co Ltd A method and apparatus for forming an underground solidification structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961683A (en) * 1972-06-22 1976-06-08 Institut Francais Du Petrole, Des Carburants Et Lubrifiants Method for determining the shape of an underground cavity and the position of the surface separating two media contained therein and device for carrying out said method
GB1558694A (en) * 1977-08-10 1980-01-09 Kajima Corp Consolidation of underground masses
SE433639B (sv) * 1977-12-27 1984-06-04 Kajima Corp En anordning for injicering av cementmjolk i jord under markytan
US4542488A (en) * 1982-07-22 1985-09-17 Mobil Oil Corporation Method and system for producing a PPI display
GB2158486A (en) * 1984-05-09 1985-11-13 Nit Co Ltd A method and apparatus for forming an underground solidification structure

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0349789A2 (fr) * 1988-07-05 1990-01-10 KELLER GRUNDBAU GmbH Méthode et dispositif pour assainir des sites contaminés
EP0349789A3 (en) * 1988-07-05 1990-10-31 Keller Grundbau Gmbh Method and device for the sanitation of contaminated sites
DE4235378A1 (de) * 1992-10-16 1994-04-21 Bohrlochzementierung Geo Techn Verfahren und Anordnung zur Erosionsinjektion in Erdstoffen
EP0699888A3 (fr) * 1994-08-23 1997-05-07 Keller Grundbau Gmbh Détermination du diamètre ou de l'épaisseur d'éléments d'une paroi
DE19521639A1 (de) * 1995-06-14 1996-05-02 Bilfinger Berger Bau Verfahren zur Überwachung eines HDI-Verfahrens
AT411399B (de) * 1997-07-21 2003-12-29 Keller Grundbau Gmbh Verfahren zum ermitteln der reichweite eines hochgeschwindigkeitserosionsverfahrens in einem baugrund
DE19731223C2 (de) * 1997-07-21 2001-04-26 Keller Grundbau Gmbh Verfahren zum Ermitteln der Reichweite eines Hochgeschwindigkeitserosionsverfahrens in einem Baugrund
DE19731223A1 (de) * 1997-07-21 1999-02-18 Keller Grundbau Gmbh Vorrichtung und Verfahren zum Ermitteln der Wirkweite eines Hochgeschwindigkeitserosionsverfahrens in einem Baugrund
NL1010967C2 (nl) * 1998-01-06 1999-10-07 Visser & Smit Bouw Bv Werkwijze voor het meten van de gesteldheid van een in de grond gevormd element, zoals een jetgroutkolom, alsmede meetapparaat daarvoor.
EP0940559A3 (fr) * 1998-03-06 2002-09-25 Stephan Eberhard Bruder Dispositif et procédé pour mesurer le diamètre d'un corps obtenu dans le sol par injection à haute pression
DE10064187C1 (de) * 2000-12-22 2002-05-08 Keller Grundbau Gmbh Vorrichtung zum Messen des Durchmessers von im Boden mittels eines Düsenstrahlverfahrens hergestellten Stütz- oder Wandelementen
DE10113804A1 (de) * 2001-03-21 2002-10-02 Keller Grundbau Gmbh Vorrichtung zum Messen des Radius bzw.Durchmessers von Hohlräumen
DE10113804C2 (de) * 2001-03-21 2003-01-16 Keller Grundbau Gmbh Vorrichtung zum Messen des Radius bzw.Durchmessers von Hohlräumen
DE10313912B4 (de) * 2003-03-27 2007-07-12 Keller Grundbau Gmbh Vorrichtung zum Bestimmen des Durchmessers bzw. Radius von Hohlräumen
EP1795655A1 (fr) * 2005-12-07 2007-06-13 Tecsoil S.R.L. Procédé d'amélioration du sol utilisant le jet grouting, permettant d'importantes économies de matériel d'injection
RU2461682C1 (ru) * 2011-02-24 2012-09-20 Владимир Яковлевич Шишкин Способ определения параметров колонн, возводимых в грунте методом струйной геотехнологии
RU2528329C2 (ru) * 2012-01-31 2014-09-10 Бауэр Шпециальтифбау ГмбХ Способ и установка для сооружения элемента траншейной стены
RU2771738C1 (ru) * 2020-11-24 2022-05-11 Акционерное общество "ВолгоградНИПИнефть" Ультразвуковой анализатор цемента

Also Published As

Publication number Publication date
EP0247135A1 (fr) 1987-12-02
NO854710L (no) 1987-05-26

Similar Documents

Publication Publication Date Title
WO1987003319A1 (fr) Procede et agencement permettant le controle et le suivi de l'etendue de la zone d'injection lors de l'injection par jet dans le sol d'un liant polymerisable
CN101962949A (zh) 长螺旋二重管高压搅喷桩施工方法及其装置
Bruce et al. The practitioner's guide to deep mixing
CN1265062C (zh) 一种成桩的施工方法及工具
CN109610479A (zh) 一种水下旋挖钻孔灌注桩采用化学泥浆粉造浆护壁施工工艺
JP2019167750A (ja) 高圧噴射攪拌工法
CN104032763A (zh) 一种组合式防渗止水帷幕结构及其施工方法
CN112252310A (zh) 采用高压旋喷桩机进行深基坑止水帷幕施工的方法
CN112901074A (zh) 一种海上大直径斜桩旋挖机嵌岩钻进成孔工艺
O’neill Construction practices and defects in drilled shafts
CN201981543U (zh) 无锁扣钢管桩基坑支护止水围堰结构
CN112281933A (zh) 高压旋喷桩试桩的施工方法
CN111455976A (zh) 挖槽法自凝灰浆防渗墙施工方法
Taki Strength properties of soil cement produced by deep mixing
RU2054502C1 (ru) Способ изготовления цементогрунтовой сваи в просадочных грунтах
CN114991670A (zh) 一种复杂土层大桩径高压旋喷桩的成桩方法
CN113174992B (zh) 一种海上深水斜桩桩周地层塌陷综合处理加固方法
JP3703633B2 (ja) 中掘拡大根固め用ヘッド
CN113481978A (zh) 一种基于pvc花管的高压旋喷桩施工方法
JP3224008B2 (ja) 水深下地盤改良工法
JP3345289B2 (ja) 地盤改良工法
CN110258509A (zh) 一种侵入地连墙槽段的水泥土墙处理方法
CN113737773B (zh) 一种淤泥质土疏干降水***及施工方法
JPS60140172A (ja) 地下埋設物の調査装置とその調査方法
CN111594175B (zh) 一种采用化学聚合物泥浆护壁的旋挖钻机成孔施工方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): DK FI SU

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE