JPWO2019002002A5

JPWO2019002002A5 -

Info

Publication number: JPWO2019002002A5
Application number: JP2019572036A
Authority: JP
Publication date: 2022-09-12
Anticipated expiration: 2038-06-18

Description

杭は、通常、コンクリートまたはスラリーから構成される。それらは、一般に、「土壌混合」と呼ばれる、土と結合剤とを混合する技術によって得ることができる。 Piles are usually constructed from concrete or slurry . They can be obtained by a technique of mixing soil and binders, commonly referred to as "soil mixing".

そのような杭を達成するために、連続オーガと呼ばれる掘削装置を使用することが知られている。この掘削装置は、螺旋状ブレードから構成される掘削工具を備える中空コアを有する。このタイプの掘削装置では、前記オーガを必要な深さまで一度降下させるだけでウェル（井筒）の掘削が達成される。支柱を作るには、スラリーまたはコンクリートをオーガの持ち上げ中に、そのオーガの下端部から注入する。 To achieve such piles, it is known to use drilling equipment called continuous augers. The drilling rig has a hollow core with a drilling tool consisting of helical blades. With this type of drilling rig, drilling of a well is achieved by lowering the auger once to the required depth. To make the struts, slurry or concrete is poured through the lower end of the auger while it is being lifted.

有利には、前記変位装置は、ジャッキング（ｊａｃｋｉｎｇ）、打撃、又は振動などによって、前記駆動装置を中空コアに対して並進変位させるように構成される。 Advantageously, the displacement device is arranged to cause a translational displacement of the drive device with respect to the hollow core, such as by jacking, striking or vibrating .

この例において、前記リンク部材は、その上端部がそのパイプにコンクリートまたはスラリーを供給するためのフレキシブルダクト５２に接続されたトレミー管である。 In this example the link member is a tremie pipe whose upper end is connected to a flexible duct 52 for supplying concrete or slurry to the pipe.

Claims

1. A system for creating columns in soil by drilling wells in the soil along a substantially vertical theoretical drilling trajectory, comprising:
A drilling rig comprising a hollow core having a longitudinal axis, said hollow core comprising a drilling tool;
a first device for rotating the hollow core and the drilling tool about the longitudinal axis;
a link member extending into the hollow core, the link member including a tremie tube having a lower portion with at least one injection hole, the tremie tube being connected to a fluid supply;
A cylindrical driving device disposed at the lower end of the tremie tube and capable of being driven to rotate about the longitudinal axis ,
an active state in which the drive is oriented and maintained in an angle correction position with respect to the soil so as to correct the displacement trajectory of the drilling rig along a trajectory correction direction considered in the horizontal plane;
a passive state in which the drive is rotated continuously so as not to alter the displacement trajectory of the drilling rig;
to identify possible deviations between the displacement trajectory of the drilling rig and the substantially vertical theoretical drilling trajectory and to determine a deviation direction of the drilling rig with respect to the substantially vertical theoretical drilling trajectory; wherein the deviation direction is considered in the horizontal plane;
a control device for controlling the rotational drive for the drive device, the trajectory correction direction associated with the angular correction position when viewed from the horizontal plane when the deviation about the substantially vertical theoretical drilling trajectory is measured; a controller for bringing the drive to its active state at an angle correction position determined such that the is opposite to the deviation direction ;
The driving device has an inclined surface at its lower end with respect to the axis of the driving device,
The driving device extends axially outward of the hollow core beyond a lower end of the hollow core at least in the active state,
The system, wherein the trajectory correction direction viewed from the horizontal plane is the direction opposite to the inclined plane .

2. The system of claim 1, wherein said controller further comprises a computing device for computing said angular correction position based on said deviation direction determined by said measuring device.

3. The system of claim 1 or 2, wherein the drive is configured to rotate in the same direction and at the same speed as the hollow core when the drive is in the passive state.

4. The system of claim 3, wherein the drilling rig has a connection device for locking rotation of the drive relative to the hollow core when the drive is in the passive state.

further comprising a second device connected to the link member for rotating the link member and the drive about the longitudinal axis, the link member being rotatable relative to the hollow core; 3. The control device is arranged to actuate the second device to activate the drive device and move it to the angle correction position when the deviation is measured. The system described in .

6. The system of claim 5, wherein the second device is configured to rotate the drive in a direction opposite to the direction of rotation of the hollow core when the drive is in the passive state.

The drive is translationally movable with respect to the hollow core, and the system is configured such that the drive is in a deployed position axially outward of the hollow core and axially of the hollow core relative to the deployed position . 7. A displacement device according to any one of claims 1 to 6, further comprising a displacement device for translationally displacing the drive relative to the hollow core along the longitudinal axis so as to have a retracted position axially inward. system .

8. The system of claim 7, wherein the displacement device is configured to displace the drive relative to the hollow core by jacking, striking or vibration .

8. The system of claim 7 , wherein in the active state of the drive the drive is in the deployed position and in the passive state of the drive the drive is in the retracted position.

10. The system of any one of claims 7-9, wherein the drive device further comprises an injection location where the injection hole is located below the lower end of the hollow core.

11. The system of any one of claims 1-10, wherein the hollow core deviation measuring device comprises a tilt sensor located in the lower portion of the hollow core.

further comprising a member for measuring the depth reached by the drilling rig, the hollow core deviation measuring device being configured to measure a deviation distance of the hollow core with respect to a vertical direction, the controller comprising: 12. Arranged to put the drive in its active state when the ratio of the deviation distance to the depth reached by the drilling rig is equal to or greater than a predetermined threshold. The system described in paragraph.

13. The system of any one of claims 1-12, wherein the drilling rig is an auger.

1. A method of creating a column in soil comprising drilling a well into the soil along a substantially vertical theoretical drilling trajectory, comprising:
providing a system according to any one of claims 1 to 13 ,
introducing the drilling rig into the soil while rotating the hollow core, the driving device being in a passive state;
measuring the deviation of the hollow core to determine the direction of deviation of the drilling rig from the substantially vertical theoretical drilling trajectory;
When a deviation greater than a predetermined threshold is measured, the drive is activated at an angle correction position determined such that the trajectory correction direction associated with the angle correction position is opposite to the deviation direction when viewed from the horizontal plane. orienting and maintaining the drive in its active state with respect to the soil ;
and injecting fluid into the well through the injection hole during ascent of the drilling rig to form a column in the soil .

A system according to claim 7 is provided, and when the deviation is measured,
by orienting and maintaining the drive with respect to the soil at an angle correction position determined such that the trajectory correction direction associated with the angle correction position is opposite to the deviation direction when viewed in a horizontal plane; put the device in its active state,
moving the drive to its deployed position;
15. The method of claim 14 , wherein the hollow core is displaced relative to the soil such that displacement of the hollow core follows displacement of the drive.