Horizontal Drilling Technology
Press Drilling (Uncontrolled)
Horizontal Drilling Technology
Press Drilling (Uncontrolled)
Press drilling is the cost-effective standard technology in which pipes are pressed into the ground without causing vibrations using a hydraulic system. It is used in sewer construction or when crossing under roads, rail tracks, and other Infrastructure. Press drilling is suitable for various pipe materials and can be performed in almost all types of soil and even in Rock. Applications include pressurized sewer lines, water mains, pipelines, district heating lines, gas lines, cables, and more. Interestingly, this method can also be performed without a receiving pit when used in compressible soils.
Advantages of press-fit holes:
Application Criteria
Horizontal Press Drilling Method, Section 6.1.2.2.2
200 - 1000 mm
10–30 m (in exceptional cases)
Steel, stoneware, reinforced concrete, concrete, polymer concrete, cast metal, PVC, KG, PE-HD, fiberglass-reinforced plastic
In uncontrolled drilling operations, the precise setup of the machine is particularly important. The following principle applies: The longer the drilling pit, the more accurate the borehole will be, since longer pipe sections can be used.
With this system, obstacles made of steel or reinforced concrete can only be removed by taking additional measures.
in almost all types of soil and rock, up to DN 400, even in hard rock (soil classes LN, LB, S1-3, FZ 1-4, FD 1-4)
Pressurized sewer lines, water mains, pipelines, district heating lines, gas lines, cables, and much more.
Crossing rivers, roads, highways, railroad tracks, buildings, and much more.
Procedure Description
This procedure is carried out in two phases as follows:
Phase 1: Driving the Steel Casing Pipes
The press drilling rig is installed in a launch pit at the specified gradient. The steel press pipe is driven hydraulically into the ground, while the drill head is simultaneously driven by the augers. The rotational movement of the augers conveys the soil material into the press pit. The resulting thrust forces are transferred to the surrounding soil via the abutment.
Rock: By using a pneumatic down-the-hole hammer, we can carry out the execution of work for drilling holes up to DN 400 even in hard rock.
Unstable soils and groundwater: In unstable soils, the drill head is run set back inside the steel pipe. This effectively prevents the formation of voids. When drilling in groundwater, this technique can also be used to create the borehole. However, if the water table is more than 0.50 m above the top of the pipe or if flowing soil types are encountered, it is better to use pilot pipe installation with a groundwater auger.
Special feature: This method can be used without a target pit. When drilling in displacable soils, a target pit is not required.
Phase 2: Installation of the media pipes
The jacking rig is installed in a launch pit at the specified gradient. The steel jacking pipe is driven hydraulically into the ground, while the drill head is simultaneously driven by the augers. The rotational movement of the augers conveys the soil into the jacking pit. The resulting jacking forces are transferred to the surrounding soil via the abutment.
Rock: By using a pneumatic down-the-hole hammer, we can carry out the execution of work for drilling holes up to DN 400 even in hard rock.
Unstable soils and groundwater: In unstable soils, the drill head is run set back inside the steel pipe. This effectively prevents the formation of voids. When drilling in groundwater, this technique can also be used to create the borehole. However, if the water table is more than 0.50 m above the top of the pipe or if flowing soil types are encountered, it is better to use a pilot pipe installation with a groundwater auger.
Special feature: This method can be used without a target pit. When drilling in displacable soils, a target pit is not required.
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