DE102009041627A1 - Method for probing warfare agent into earth, at e.g. highways, involves measuring geophysical parameter of space around drill head and/or drilling rod during drilling operation, and transmitting measuring results to control unit - Google Patents

Abstract

The method involves connecting a drill head with a drilling rod that is arranged at a drilling system. A drill is driven as a pilot drill (5) in a horizontal direction outside a warfare agent suspected area (1) at a target cavity (4). A geophysical parameter of space around the drill head and/or the rod is continuously or discontinuously measured by a measuring device during drilling operation or after completion of the pilot drill. The measuring results are transmitted to a control unit. A drilling suspension is inserted into the pilot drill, where the suspension supports the pilot drill. An independent claim is also included for a device for probing a warfare agent into the earth.

Description

The invention relates to a method and a device for probing in the ground ordnance.

As a result of warlike conflicts are usually ordnance - such. Unleashed bombs or wild buried ammunition - enter the ground whose presence or location is not known or no longer known and usually pose a high potential hazard to the environment in civil engineering work such as laying pipes or cables.

The previous probing of ordnance in suspected areas, in particular for the laying of pipes with a laying depth of more than 4.00 meters below ground level, is carried out by the systematic search by means of vertical boreholes and magnetic field anomaly measurements.

A systematic drill hole grid is placed over the route of the new line to be laid and each vertical hole is measured (magnetic depth sounding / borehole sounding) and then backfilled.

• – Festlegung eines der Aufgabenstellung entsprechenden Bohrlochrasters bzw. der Bohransatzpunkte;
• – Einzeichnung aller Bohransatzpunkte auf einer Karte, einschließlich der eindeutigen Benennung und Belegung mit Koordinaten: Anlage, Einmessung und Durchführung der Bohrungen;
• – Durchführung der Bohrungen gemäß Bohrlochplanung;
• – Durchführung der Tiefensondierungen;
• – Darstellung des Umrisses der Messflächen(n) als Koordinatenzug (Polygonzug) im Lageplan;
• – Verrohrung der Bohrlöcher mit einem PVC-Rohr zu (Innendurchmesser mindestens 60 mm) und Verschleißen der Rohrunterseite mit Stopfen gegen Aufspülen vom Erdreich.

The implementation of these deep soundings according to the prior art is carried out in the following work steps:

• - Defining a drill hole grid or the Bohransatzpunkte corresponding to the task;
• - Marking of all drill points on a map, including the unique designation and assignment of coordinates: installation, calibration and drilling;
• - Drilling according to wellbore planning;
• - carrying out depth soundings;
• - representation of the outline of the measuring surfaces (n) as a coordinate train (polygonal) in the site plan;
• - Piping of the drill holes with a PVC pipe to (internal diameter at least 60 mm) and wear the pipe bottom with plugs against rinsing from the soil.

The first hole according to the drill hole grid is placed in 1 meter sections. After each section must be probed (freely measured). In the absence of interference, the immediately adjacent holes can be drilled without interruption in the desired depth and probed. The second (immediately adjacent) row of holes can be drilled in full length without intermediate control if it is parallel to the first in the desired search grid. If the second row has been completely probed, the third may be drilled without interruption, if necessary, each successive row of boreholes.

Computer-aided borehole sounding involves the probing, detection and assessment of magnetic field anomalies in the boreholes. As a result, a systematic search is carried out for bomb blind people in - usually - hexagonal borehole screens.

The results provide data for bomb rescue decision support and allow accurate location of bombs at great depth.

This process is only associated with considerable expenditure of time and high costs, in particular for the client. Especially in the area of highways and railway lines, there is a significant disruption of the infrastructure. In the groundwater field, this conventional method of probing is hardly feasible. In addition, there is a significant risk to the investigator in performing the drilling because the personnel and drilling equipment is directly above the suspected ordnance areas and areas.

Also known are horizontal drilling, with which pipelines are laid underground in the ground, without having to dug an open trench on the laying length. The horizontal drilling rig drills a channel or a pilot hole underground between two pits. Thereafter, one or more product or conduits are drawn. For the majority of all holes, a maximum diameter of 70 mm is planned. When moving in conduits later lines, such. As power lines or telecommunications lines confiscated. Holes drilled by such methods can be up to several hundred meters long. Horizontal drilling rigs work with traction and thrust, rotary drilling, flushing and percussion drilling. In general, a horizontal drilling rig consists of a drilling device, a mixing plant for drilling mud, preferably bentonite and a drive device. The known horizontal drilling rigs are used exclusively for the propulsion of drill heads, which are connected by means of drill pipe to the drill drive. Also known are controllable drill heads by means of a transmitter, which indicates the position of the drill head in the ground.

The object of the invention is therefore to provide a method and a device which avoids the disadvantages of the prior art and which are suitable for probing the use of horizontal drilling rigs on ordnance or ordnance storage.

The object of the invention is solved by the features of claims 1 and 11. The subclaims 2 to 10 and 12 to 14 indicate preferred advantageous embodiments of the invention.

• a) Instellungbringen einer Bohranlage an einem Ausgangspunkt, welche für horizontale Bohrungen einsetzbar ist und die mit einer Steuerungseinheit verbunden ist, vorzugsweise in der Nähe eines Kampfmittelverdachtsgebietes,
• b) Verbinden des Bohrkopfes mit dem an der Bohranlage angeordneten Bohrgestänge, wobei in dem oder am Bohrkopf oder in geringem Abstand vom Bohrkopf in oder an dem Bohrgestänge ein oder mehrere Positionierungsmessgeräte angeordnet sind, welche die Lage des Bohrkopfes im Raum messen und die Messdaten an die Steuerungseinheit übermitteln,
• c) Vortrieb einer Bohrung als Pilotbohrung in im Wesentlichen horizontaler Richtung unter oder innerhalb des Kampfmittelverdachtsgebietes zu einem Zielpunkt, vorzugsweise außerhalb des Kampfmittelverdachtsgebietes, wobei
• d) während des Bohrvortriebes oder nach Fertigstellung der Pilotbohrung kontinuierlich oder diskontinuierlich mittels ein oder mehrerer Messgeräte die geophysikalischen Parameter des Raumes um den Bohrkopf und/oder des Gestänges gemessen werden und
• e) die Messergebnisse an die Steuereinheit insbesondere einer Messauswerteeinheit zur Auswertung übermittelt werden.

The inventive method for probing ordnance in the soil has the following steps:

• a) setting up a drilling rig at a starting point, which can be used for horizontal drilling and which is connected to a control unit, preferably in the vicinity of a suspected ordnance area,
• b) connecting the drill head to the drilling rig arranged on the drilling rig, wherein in or on the drill head or at a short distance from the drill head in or on the drill string one or more positioning measuring devices are arranged which measure the position of the drill head in space and the measurement data to the Transmit control unit,
• c) Drilling a hole as a pilot hole in a substantially horizontal direction below or within the suspected ordnance area to a target point, preferably outside the suspected ordnance area, wherein
• d) during drilling or after completion of the pilot hole continuously or discontinuously by means of one or more measuring devices, the geophysical parameters of the space around the drill head and / or the linkage are measured and
• e) the measurement results are transmitted to the control unit, in particular a measurement evaluation unit for evaluation.

An advantageous embodiment of the invention is characterized in that the measurement according to step d) takes place during the drilling drive through measuring devices arranged in or on the drill head or in or on the drill pipe, preferably at a small distance from the drill head.

A further preferred variant of the invention provides that after completion of the pilot hole according to step c) in a separate process step, the measuring device or instruments for measuring geophysical parameters are introduced into the pilot hole, which measure the space surrounding the pilot hole along the pilot bore and the Transmit measurement results to the control unit and / or measurement evaluation unit.

The method according to the invention is particularly advantageous if, after completion of the pilot drilling according to step c), a probing tube is coupled to the drill string at the target point and the probing tube is drawn back through the pilot hole back to the starting point, the measuring instruments being used for geophysical measurement in or on the probing tube or Drill rods are arranged and during the collection of the probing tube into the pilot hole continuously or discontinuously measure the space surrounding the pilot hole and transmit the results to the control unit.

A further preferred embodiment of the method according to the invention is characterized in that after completion of the pilot hole according to step c) at the target point, a probing tube is coupled to the drill pipe and the sounding tube is drawn back through the pilot hole back to the starting point, then in a further process step the Measuring instruments for measuring geophysical parameters are introduced into the probing tube and measure along the pilot bore of the space surrounding the pilot bore and transmit the measurement results to the control unit.

An advantageous and preferred embodiment of the inventive method indicates that methods for measuring or determining the geophysical parameters are used on the basis of electromagnetic systems, in particular ground radar and magnetometry or gradiometry.

Furthermore, a preferred embodiment of the proposed method provides that as soon as the evaluations of the measurements of the geophysical parameters exceed certain limit values, the course of the bore can be adjusted by the control of the drill head in accordance with the potential danger of the suspected weapon.

The method according to the invention is particularly advantageous if a drilling suspension is introduced into the pilot bore, the drilling suspension supporting the pilot bore and preventing cavitation formation.

Another embodiment of the invention ausgestaltender method step is the drawing of a conduit by means of a collection tool after completion of the measurements according to step d) in the pilot hole and / or the probing tube, especially if the probe tube is expanded or removed before the introduction of the conduit by means of a broaching tool.

Furthermore, the object is proposed by a device probing of ordnance and for carrying out the method according to the invention, which consists of a drilling rig preferably a horizontal drilling rig, a drill string, a control unit for controlling the bore, a drill head or a broaching tool or a pipe pulling tool, wherein Preferably at least one measuring device for measuring the position in the ground is arranged in addition to the drill head and / or the drill string or the broaching and / or retracting tool and / or that at least one measuring device for measuring geophysical parameters is arranged and that the measuring devices with at least one Messauswerteeinheit are connected, which is preferably connected to the control unit. A further preferred embodiment of the invention provides that a flushing device is connected to the drilling rig.

The main advantages of the probing method according to the invention are the very low disruption of the infrastructure such. As railway lines, highways, highways during the exploratory work.

Furthermore, there is a significantly lower risk of a horizontal well compared to a large number of vertical holes in the prescribed grid spacing. This leads to a considerable increase in occupational safety due to the greater distance of the drilling personnel from the suspected ordnance surfaces not yet investigated.

Very significant are also the cost advantages of the proposed method and device over the conventional (many) vertical probing holes, which lead to a cost minimization.

Not least, a significant reduction in the time required for probing and thus the production of a new line with the proposed method and the device is connected.

An embodiment of the invention will be explained below with reference to the drawings.

It shows 1 a section through a suspicious ordnance area and the production of a pilot hole.

2 shows the entry of a probing tube into the pilot hole.

3 represents the probed area around the pilot hole within the combat center suspect area.

4 shows the entry of a new line into the pilot hole.

In 5 is a reamer with a conduit on a drill string shown.

In 6 a probe with magnetometer arranged in a probing tube.

As a rule, a pit is dug both at the beginning and at the end of the intended drill pipe. The horizontal drilling rig 2 then drill a pilot hole in the direction of a drill bit 6 the target pit 4 , The drill head is with a drill pipe 19 connected, that of the drilling device, in this embodiment, a horizontal boring machine 2 , in the soil 18 is driven. As the drilling progresses, the linkage becomes 19 the drilling rig 2 extended by a further linkage part. This process repeats until the hole is created. In general, the linkage is flexible, so that the drill head can be controlled, that is, the direction of the holes is changeable.

The hole is predominantly already at the beginning obliquely down into the soil 18 directed; as soon as the desired drilling depth is reached, the drill head swings and the hole runs more or less horizontally to the surface of the earth close to the target. There, the drill head again changes direction, so obliquely up in the target pit 4 withdraw.

Has the drill head the target pit 4 achieved, he is against a broaching tool 10 exchanged, wherein usually the reamer has a larger diameter than the drill head. The horizontal drilling rig 2 now pulls the drill pipe 19 in the direction 13 back, taking the broach 10 the pilot hole 5 expands. Simultaneously with the retraction of the drill string 19 can be a probing tube 7 or a piping and / or the desired lines in the pilot hole 5 or the larger channel resulting from the broaching tool.

For clearing out and stabilizing the pilot hole 5 , for the cooling of the drill head and as a lubricant special drilling muds, in particular from bentonite, are used.

The drill head is controlled by means of a transmitter in the drill head, which informs the drill master about the depth, direction, inclination and angle of the drill head.

Horizontal drilling rigs are used for pipelaying in inner cities, undercrossing of flowing waters, railway tracks, runways of airports, roads and highways as well as of lines, preferably in nature reserves. The horizontal drilling rigs which are preferably to be used work with traction and thrust, in the rotary drilling method and with muds, but not as percussion drills because of the danger of detonation possibly existing ordnance.

Horizontal drilling rigs are preferably used for carrying out controlled horizontal drilling (HDD, horizontal directional drilling).

By means of a horizontal drilling rig 2 will - as in 1 shown - a horizontal pilot hole 5 manufactured with a supported and defined annulus up to 90 mm. This pilot hole 5 lies in the axis of the later to be relocated line 8th , The use of a modified knife edge, not shown, and a special support suspension preclude the formation of caverns.

One in the drill bit of the horizontal drilling rig 2 installed transmitter electronically transmits data to the measuring station. The special shape of the control device allows a targeted change of direction and the display of anomalies in the ground.

If the pilot hole 5 the opposite goal or the target pit 4 has reached, is the pilot hole 5 completed. On the side of the target becomes the probing tube 7 coupled and in the pilot hole 5 moved in.

In the second phase, this horizontal pilot hole 5 with a probing tube 7 as a protective tube in the opposite direction 13 preferably cased with a collection tool, as in 2 shown.

About this probing tube 7 takes place in the 3 third phase of the exploration of the underground space in the suspicious ordnance area 1 on the possible presence of ordnance. In this case, in this embodiment, the pilot hole 5 surrounding space as annulus or exploratory area 17 by means of a probe 15 with a magnetometer, a measuring device for geophysical measurement, and a measuring range substantially dependent on the magnetometer used 16 the probe of preferably 1400 mm in horizontal route of the new line to be laid 8th examined. The measurement is continuous or discontinuous and the results are measured by means of a data transmission cable 14 transmitted to the control unit, not shown.

Once the ordnance clearance has been determined or any ordnance that has been found has been recovered and disposed of by the ordnance clearance service, the works may be relocated to the designated line 8th kick off. The combat agent-free area 9 lies in this embodiment with a diameter of 1400 mm around the axis of the pilot hole and the probing tube 7 and thus roughly corresponds to the exploratory area 17 ,

After evaluation of the determined and via the data transmission cable 14 transmitted data is - as in 4 shown - in the fourth phase of this protective tube or probing tube 7 with corresponding broaching tools 5 again removed and defined in this and as a combat agent-free area 9 shared underground annulus the new lead 8th laid. Alternatively, on the axis of the probed area 9 the pilot hole 5 cavern free expanded and the new to be laid, a larger diameter than the probing tube 7 or the pilot hole 5 having direction 8th or retracted a conduit protective tube.

This will - as in 5 shown - the pilot hole 5 or the probing tube 7 with suitable broaching tools 10 caved free expanded, supported and the new line 8th moved in.

6 shows the probe used for the implementation in this example and placed in a probe protective tube 15 with magnetometer and its measuring range 16 , In the exploratory tube 7 transmits the magnetometer probe 15 over the entire length of the pilot hole 5 the determined data to the Meßwerteinrichtung which is connected to the control unit. Magnetic field anomalies are evaluated in the soil 18 especially in the suspicious ordnance area 1 that can indicate the presence of munitions.

LIST OF REFERENCE NUMBERS

1

Weapon suspected area or area

2

Horizontal drilling rig

3

Entry area of the hole in the ground

4

target pit

5

pilot drilling

6

Direction of propulsion of the hole

7

sounding pipe

8th

Conduit and / or pipe

9

Weapon-free area

10

reamer

11

Above-ground infrastructure

12

clutch

13

Direction of the clearing or collection tool

14

Data transmission cable

15

Probe with magnetometer

16

Measuring range of the probe 15

17

exploratory area

18

soil

19

drill pipe

Claims (14)

Method for probing ordnance in soil with the following steps: a) Setting up a drilling rig ( 2 ) at a starting point, which can be used for horizontal bores and which is connected to a control unit, preferably in the vicinity of a suspected ordnance area ( 1 ), b) connecting the drill head to the drill pipe ( 19 ), wherein in or on the drill head or at a short distance from the drill head in or on the drill string ( 19 ) one or more position measuring devices are arranged, which measure the position of the drill head in space and transmit the measured data to the control unit, c) driving a bore as a pilot bore ( 5 ) in a substantially horizontal direction below or within the suspected ordnance area ( 1 ) to a destination ( 4 ), preferably outside the suspected ordnance area ( 1 ), where d) during drilling or after completion of the pilot hole ( 5 ) continuously or discontinuously by means of one or more measuring instruments ( 15 ) the geophysical parameters of the space around the drill head and / or the linkage are measured and e) the measurement results are transmitted to the control unit. A method according to claim 1, characterized in that the measurements according to step d) during the Bohrvortriebes by in or on the drill head or in or on the drill string ( 19 ) preferably arranged at a small distance from the drill head measuring devices. A method according to claim 1, characterized in that after completion of the pilot hole ( 5 ) according to step c) in a separate process step, the measuring device (s) ( 15 ) for measuring geophysical parameters in the pilot hole ( 5 ), which along the pilot bore the space surrounding the pilot hole ( 16 ) and transmit the results to the control unit. A method according to claim 1, characterized in that after completion of the pilot hole ( 5 ) according to step c) at the target point a probing tube ( 7 ) to the drill string ( 19 ) and the probing tube ( 7 ) through the pilot hole ( 5 ) back to the starting point ( 3 ), the measuring instruments ( 15 ) for geophysical measurement in or on the probing tube ( 7 ) or drill pipe ( 19 ) and during the collection of the probing tube ( 7 ) into the pilot hole ( 5 ) continuously or discontinuously the space surrounding the pilot hole ( 16 ) and transmit the results to the control unit. A method according to claim 1, characterized in that after completion of the pilot hole ( 5 ) according to step c) at the target point a probing tube ( 7 ) is coupled to the drill string and the probing tube is drawn back through the pilot hole back to the starting point, then in a further process step, the measuring devices ( 15 ) for measuring geophysical parameters in the probing tube ( 7 ) and along the pilot hole ( 5 ) the space surrounding the pilot hole is measured ( 16 ) and the measurement results are transmitted to the control unit. Method according to one or more of claims 1 to 5, characterized in that for the measurement or determination of the geophysical parameters methods based on electromagnetic systems, in particular ground radar and magnetometry or gradiometry are used. Method according to one of claims 1 to 6, characterized in that as soon as the evaluations of the measurements of the geophysical parameters exceed certain limits, the bore can be adjusted by the control of the drill head according to the potential danger of the suspected weapon. Method according to one of the preceding claims, characterized in that in the pilot hole ( 5 ) a drilling suspension is introduced, wherein the drilling suspension is the pilot hole ( 5 ) and prevents cavitation. Method according to one of the preceding claims, characterized in that after completion of the measurements according to step d) in the pilot hole ( 5 ) and / or the probing tube ( 7 ) by means of a collection tool, a conduit ( 8th ) is fed. A method according to claim 9, characterized in that before the introduction of the conduit by means of a broaching tool ( 10 ) the probing tube ( 7 ) is expanded or removed. Device for probing ordnance in the ground and in particular for carrying out the method according to one of claims 1 to 10 consisting of a drilling rig, preferably a horizontal boring machine ( 2 ), a drill string ( 19 ), a control unit for controlling the bore ( 5 ), a boring head or a broaching tool ( 10 ) or a pipe-pulling tool and at least one measuring device for measuring geophysical parameters ( 15 ), which is connected to a measurement evaluation unit. Apparatus according to claim 11, characterized in that at least one measuring device for measuring the position in the ground is arranged on the drill head and / or the drill pipe or the broaching and / or retraction tool. Apparatus according to claim 11 or 12, characterized in that and / or that the measuring device or measuring devices for measuring geophysical parameters on the drill head and / or the drill string ( 19 ) or the broaching tool ( 10 ) and / or insertion tool and / or in or on the probing tube ( 7 ) is arranged and that the measuring means are connected to at least one Meßauswerteeinheit, which is preferably connected to the control unit. Apparatus for carrying out the method according to claim 11 or 12, characterized in that a flushing device is connected to the drilling rig.

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