Construction machine, displacement tube and method for creating a filling material column in the ground

Patent metadata

Field	Value
Publication number	US-12392102-B2
Application number	US-202218263484-A
Country	US
Kind code	B2
Filing date	Mar 14, 2022
Priority date	Mar 24, 2021
Publication date	Aug 19, 2025
Grant date	Aug 19, 2025

Abstract

The invention relates to a construction machine for introducing a displacement tube into the ground, wherein the displacement tube comprises a tube base body and, at its lower end, a closure device which comprises at least one closure flap which is adjustable between a closed position, in which the displacement tube is closed downwards by the at least one closure flap, and an open position, in which filling material is discharged from the displacement tube into the ground for forming a filling material column, wherein the construction machine comprises a feed drive for introducing and retracting the displacement tube into and out of the ground, respectively. According to the invention, it is provided that an actuating unit with at least one pressing-on element is arranged on the construction machine, by means of which the at least one closure flap is adjustable from the open position into its closed position and retainable in said position before contacting the ground at least until the closed closure flap penetrates into the ground. The invention further relates to a method for creating a filling material column.

First claim

The invention claimed is:

1. A construction machine for introducing a displacement tube into the ground, wherein the displacement tube comprises a tube base body and, at its lower end, a closure device which comprises at least one closure flap which is adjustable between a closed position, in which the displacement tube is closed downwards by the at least one closure flap and an open position in which filling material can exit from the displacement tube into the ground for forming a filling material column, wherein the construction machine comprises a feed drive for introducing and retracting the displacement tube into and out of the ground, respectively,
wherein
an actuating unit having at least one pressing-on element is arranged on the construction machine, by means of which the at least one closure flap is adjustable from the open position into its closed position and retainable in said position before contacting the ground at least until the closed closure flap penetrates into the ground.

2. The construction machine according to claim 1 ,
wherein
the feed drive can be moved vertically with the displacement tube along a mast, and
the actuating unit is arranged at a lower end of the mast.

3. The construction machine according to claim 1 ,
wherein
the at least one pressing-on element has an actuating arm which is adjustable, in particular pivotable, between a pressing-on position for closing the closure flap and a retracted position in which the pressing-on element is spaced apart from the displacement tube and the at least one closure flap.

4. The construction machine according to claim 3 ,
wherein
a pressure-on plate is attached to a free end of the actuating arm.

5. The construction machine according to claim 1 ,
wherein
the displacement tube comprises two closure flaps, and
the actuating unit correspondingly comprises two pressing-on elements, each of which is assigned to a closure flap.

6. The construction machine according to claim 5 ,
wherein
the pressure-on plates of the two pressing-on elements are arcuate and are designed for abutting and guiding the displacement tube during further introduction into the ground.

7. The construction machine according to claim 1 ,
wherein
a control means is provided by which the at least one pressing-on element is actuatable towards the at least one closure flap for closing the displacement tube before the at least one closure flap penetrates into the ground.

8. A displacement tube for creating a filling material column in the ground, wherein the displacement tube is introducible into the ground by means of a construction machine according to claim 1 , and
the displacement tube comprises a tube base body and, at its lower end, a closure device which comprises at least one closure flap which is adjustable between a closed position, in which the displacement tube is closed downwards by the at least one closure flap, and an open position, in which filling material can exit from the displacement tube into the ground for forming a filling material column, wherein the at least one closure flap is pivotably hinged to an outer side of the tube base body by means of a pivot joint,
wherein
a radially projecting actuating portion is formed on an outer side of the at least one closure flap, which portion can be brought into engagement with a pressing-on element of an actuating unit of the construction machine, wherein the closure flap can be pressed from the open position into the closed position by contact with the actuating portion, and
the actuating portion is formed on the closure flap in such a way that the actuating portion projects radially outwards with respect to the pivot joint both in the open position and in the closed position.

9. The displacement tube according to claim 8 ,
wherein
the closure device comprises two closure flaps which are supported on the tube base body.

10. The displacement tube according to claim 8 ,
wherein
a feed device for feeding the filling material is arranged at an upper end of the tube base body.

11. A method for creating a filling material column in the ground, with a construction machine according to claim 1 , in which
a displacement tube having a closure device with at least one closure flap is introduced into the ground, which flap is in a closed position during introduction, and
when a final depth is reached, the at least one closure flap is pivoted from the closed position into an open position, wherein filling material for forming a filling material column is introduced into the ground through an outlet opening,

wherein
by means of the actuating unit arranged on the construction machine, the at least one closure flap is pressed-on by least one pressing-on element before a displacing contacting of the closure flap with the ground, wherein the at least one closure flap is adjusted from the open position into the closed position.

12. The method according to claim 11 ,
wherein
the at least one pressing-on element abuts the at least one closure flap until the latter penetrates into the ground, and
subsequently the at least one pressing-on element is retracted from the closure flap again.

13. The method according to claim 11 ,
wherein
the displacement tube is retracted from the ground again, and
during a retraction movement of the displacement tube, the at least one closure flap is adjusted into the open position.

Assignees

• Bauer Spezialtiefbau

Inventors

• Seifert Michael
• Karmann Bernhard
• Voigt Heiko
• Karl Herbert

Classifications

• E02D2250/003

  Injection of material · CPC title

• E02D2250/0007

  using a mold · CPC title

• E02D2200/1685

  cylindrical · CPC title

• E02D5/665

  for making piles · CPC title

• E02D3/08

  by inserting stones or lost bodies, e.g. compaction piles (sand drains for soil compaction E02D3/10; stressing soil while forming foundations E02D27/28) · CPC title