EP1012409B1 - Device and method for excavating and redepositing earth - Google Patents

Device and method for excavating and redepositing earth Download PDF

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Publication number
EP1012409B1
EP1012409B1 EP19980929295 EP98929295A EP1012409B1 EP 1012409 B1 EP1012409 B1 EP 1012409B1 EP 19980929295 EP19980929295 EP 19980929295 EP 98929295 A EP98929295 A EP 98929295A EP 1012409 B1 EP1012409 B1 EP 1012409B1
Authority
EP
European Patent Office
Prior art keywords
milling
excavator bucket
characterized
mixing
mixing rotor
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP19980929295
Other languages
German (de)
French (fr)
Other versions
EP1012409A1 (en
Inventor
Dieter Simons
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schenk Juergen Hans
Wirtgen GmbH
Original Assignee
Schenk Juergen Hans
Wirtgen GmbH
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
Priority to DE1997127549 priority Critical patent/DE19727549C2/en
Priority to DE19727549 priority
Application filed by Schenk Juergen Hans, Wirtgen GmbH filed Critical Schenk Juergen Hans
Priority to PCT/EP1998/002756 priority patent/WO1999000555A1/en
Priority to CA 2293958 priority patent/CA2293958C/en
Publication of EP1012409A1 publication Critical patent/EP1012409A1/en
Application granted granted Critical
Publication of EP1012409B1 publication Critical patent/EP1012409B1/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36Component parts
    • E02F3/40Dippers; Buckets Grab device, e.g. manufacturing processes for buckets, form, geometry, material of buckets
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36Component parts
    • E02F3/40Dippers; Buckets Grab device, e.g. manufacturing processes for buckets, form, geometry, material of buckets
    • E02F3/402Dippers; Buckets Grab device, e.g. manufacturing processes for buckets, form, geometry, material of buckets with means for facilitating the loading thereof, e.g. conveyors
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/962Mounting of implements directly on tools already attached to the machine
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F5/00Dredgers or soil-shifting machines for special purposes
    • E02F5/02Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/025Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with scraper-buckets, dippers or shovels

Abstract

The invention relates to a device for digging trenches and refilling them with earth, especially for laying pipes. Said device comprises a self-propelled travelling mechanism (2), said travelling mechanism supporting a machine frame (4) with an upper structure. The device also has a boom (6) which is mounted on said machine frame (4) in such a way that it can pivot, and a shovel bucket (16). Said boom has several boom arms (8, 10, 12) which are connected in such a way that they are articulated. The shovel bucket (16) is pivotably mounted at the free end of the boom (6). According to the invention, a milling/mixing rotor (22) is located on the shovel bucket (16).

Description

The invention relates to a device and a method for excavating and filling in soil, in particular for laying pipes in trenches according to the generic term of claims 1, 2 and 14. Such a device is already known from document WO-A-9513432.

When digging trenches, especially for pipe laying, excavator vehicles are used, the one swiveling have stored excavator bucket at the end of a boom. The boom usually consists of several articulated interconnected boom arms, one of an operator or specified by a controller Allow bucket movement of the excavator bucket. The Trenches required for pipe laying are approx. 3m deep and approx.1.20 m wide.

With conventional pipe laying, the Digging and digging the excavated material in a landfill disposed of. After that, an overlay was laid in the ground for created the pipes and the pipes at least up to half their diameter embedded in a grit or gravel layer. Compressible filling material is delivered in the Digging and compacting. The trench is then filled up with gravel and, if necessary, with asphalt overbuilt.

This approach has several disadvantages. The removal of the excavated soil and the storage of the excavated material in a landfill costs approximately DM 40 / m 3 . From an ecological point of view, the disposal of the soil is also unnecessary. There are also high costs for the filling material supplied. Furthermore, complex logistical planning is required for the removal and delivery of the materials by truck. The construction site must be cordoned off in order to secure truck traffic so that no small traveling construction site can be set up. Finally, the progress of the construction site is also largely dependent on traffic and on the timely, continuous removal of the waste and the timely, continuous delivery of the filling materials.

The invention is therefore based on the object of a device and a method of excavation and refilling of soil to indicate with which a faster work progress while saving raw materials and waste reduction is enabled.

The features of the claims serve to solve this problem 1, 2 and 14.

The invention advantageously provides that at the Excavator bucket a milling / mixing rotor is stored. The Arrangement of the milling / mixing rotor on the excavator bucket allows different in an advantageous manner Carry out operations with the same construction vehicle. The excavator bucket is initially used in a conventional manner Excavation and filling of soil can be used. With help of the milling / mixing rotor, the soil can be separated Milling, loosening and crushing, so that the removed soil is reusable.

The volume enclosed by the excavator bucket is in a receiving room for the excavation and a mixing room for divided the milling / mixing rotor. The mixing room surrounds the Milling / mixing rotor and is not with the recording space Excavator bucket connected.

A spray device can liquid binder in the Spray the mixing area of the excavator bucket.

In this way, when milling a layer at the same time Binder added and this into the loosened and shredded material mixed in. The processed Material can then be used as filler become. The excavator bucket can also be a distribution device for powdered binders.

For this purpose, the excavator bucket preferably has a storage room for powdered binder. This pantry is, for example, in the rear area Excavator bucket arranged.

The powdered binder can be taken from the storage room With the help of a rotary valve, preferably is arranged behind the milling / mixing rotor. The The rotary valve runs parallel to the milling / mixing rotor.

A control can move the excavator buckets in Dependence of the position of the boom arms under setting control a predetermined milling depth.

In this way, the trajectory of the excavator bucket exactly maintained with constant milling depth, without the Perform complicated control movements got to.

The milling / mixing rotor is in the bucket of one partially covered circular hood, which limits the mixing space in the excavator bucket. The Milling / mixing rotor is in the side of the cover boundary side walls of the excavator bucket.

The method according to the invention looks more advantageous Way before that after excavating a first trench section removing the excavated material, creating an overlay, as well as the introduction and embedding of Pipes in a grit and gravel layer in the first trench section in a conventional manner, the following Trench section in several layers initially with one predetermined milling depth while loosening and mixing up the milled material, with addition of binders. That prepared in this way Material is excavated and used as filling material placed on the pipes in front of it. at Construction begins with a first in the conventional manner Trench piece for laying approx. 1 to 3 pipes and after prepared for laying the pipes for filling. The subsequent trench section is not conventional Excavated with the excavator shovel, but with the help of a milling / mixing rotor processed and in layers along a defined path. When milling, Loosening and crushing the material layer becomes a binder added and mixed into the loosened layer. Only then is the previously loosened up and processed Layer with the same excavator bucket in bucket position dug up and onto the ones immediately in front Unloaded pipes as filling material. If the filler for the pipes in the first trench section is completely unloaded, is a corresponding second upstream trench section exposed, in turn 1 to 3 pipes can be stored, so that in the following Working section reprocessed soil as filling material can be used.

The method according to the invention has the decisive one Advantage that the excavated soil by processing and due to the addition of binder as filler can be used, making the complete removal excavation, as well as the delivery of regulations Filling material is not required. Landfill costs, as well as the Costs for the filling material are saved and ultimately also the cost of removing the soil and the supply of the filling material.

Due to the omitted transports is a continuous one Work progress possible, so the construction time is reduced and the construction site can be downsized. Finally, construction site traffic also becomes significant reduced because only the material for grit, gravel and Delivered gravel layers and small amounts of Waste material must be disposed of.

The following is a reference to the drawings Embodiment of the invention explained in more detail.

Show it:

Fig. 1
milling the soil in an area upstream of the pipe,
Fig. 2
excavating the refilled filler material,
Fig. 3
a side view of the excavator bucket with integrated milling / mixing rotor, and
Fig. 4
a cross section through a trench in which a pipe is laid.

An excavator vehicle with a chassis 2, which is a machine frame 4 carries with a structure, can with the help of a Control one arranged at the free end of a boom 6 Move excavator bucket 16 along a trajectory. The boom 6 has several articulated to each other Cantilever arms 8,10,12 on the complex movements allow the excavator bucket 16. The excavator bucket 16 has two joints 18, 20, which are connected via control arms 14, 15 pivoting of the excavator bucket 16 relative to the Enable boom arm 12.

The excavator vehicle is at ground level above one of the Soil 44 excavated trench positioned.

Pipes 46 are deposited in the trench, the work progress each in sections in trench sections he follows. There can be about 1 to 3 pipes in each trench section 46 are laid in a row, the excavated Soil 44 from the trench section upstream of the pipes 46 56 as filling material for the pipes 46 contained Trench section 52 is used.

A cross section through the trench with pipe 46 installed 4 can be seen. After the trench is excavated first a bottom or support layer for the tubes 46 created in soil 44 by making the bottom of the trench horizontal is withdrawn, if necessary with the provision of a gutter for inserting the pipes. The control of the trajectory the excavator bucket is preferably carried out with the help of a Excavators leveling system. Then a split layer and / or a gravel layer 48 with a grain <20 mm to fill the tubes 46 up to about Embed half of their diameter. On this grit or Gravel layer 48 and the opposite of the grit and Gravel layer 48 protruding part of the tubes 46 becomes filling material 50 filled, which may be compressed. Above the Filler layer 50 can be a gravel layer 54 and an asphalt layer 58 is provided as the uppermost layer his.

Fig. 1 shows the milling of the tubes 46 in the trench section 52 upstream trench section 56 with the help a milling / mixing rotor mounted on the excavator bucket 16 22. In the embodiment shown in FIG. 1 the milling / mixing rotor 22 on the underside of the excavator bucket 16 in the side walls 28 of the excavator bucket 16 stored. A cover 23 surrounds the excavator bucket 16 facing parts of the milling / mixing rotor 22 and surrounds a mixing space 26 in which the milled in layers Material of the soil 44 loosened and crushed becomes.

As best seen in Fig. 3, is the milling / mixing rotor 22 with chisel tools 25, e.g. Attack cutting tools, Mistake. Alternatively, on the outer surface of the milling / mixing rotor 22 paddles or knives can also be arranged.

The milled and mixed in the mixing room 26 and crushed material is added with a liquid or powdered binder from the milling / mixing rotor 22 deposited again and can in a subsequent excavation process, as shown in Fig. 2, excavated after processing and, as shown in broken lines in FIG. 2, in the trench section 52 on the tubes 46 as filler material 50 are filed. The excavator vehicle can due to the width of its lane also in the direction of the first trench section 52 are moved to fill the material 50 to unload.

The excavator bucket 16 has one in the front area Recording room 24 for excavation and behind the recording room 24 a storage space 38 for powdered binder on from the receiving space 24 through a partition 37 is separated. The storage space 38 can be on its top via a flap 39 with powdered binder be filled.

This storage space 38 is dimensioned so that it powdered binder for at least one trench section can be included. A rotary valve 42 with parallel axis alignment to the milling / mixing rotor 22 arranged laterally next to the cover 23 and promote the powdered binder from the storage space 38 in the worn-out layer of the trench. The powdery The binder is made using the milling / mixing rotor 22 intensive with the loosened and shredded material mixed. At the same time, with the help of a feed line 36 liquid binder supplied to the excavator bucket 16 be, for example, three parallel to Milling / mixing rotor 22 extending spray ramps 32 immediately is injected into the mixing chamber 26. The addition of powder and / or liquid binder the preparation of the soil in such a way that Soil as filling material in the ditch section in front of it 52 can be used. The liquid binder is processed in a suspension mixer and over the Feed line 36 supplied to the excavator bucket 16.

The storage space 38 for powdered binder can also, for example, via a pneumatic feed line be filled up intermittently with binder.

The dosage of the binder addition, solid or liquid, takes place with the help of the control.

It is particularly advantageous that for excavation and refilling No need to change the construction vehicle of the trench is because the excavator bucket has an integrated Milling / mixing rotor 22. In this way it is Significantly reduced time and material expenditure, while at the same time reducing the volume of waste Remaining portion is reduced. The purchase of filling material including the complex transportation of the filling material eliminated.

Claims (17)

  1. Device for excavating and backfilling of soil (44), in particular for laying pipes in ditches, comprising an automotive travelling mechanism (2) carrying a machine frame (4) with an upper structure, a boom (6) pivoted to the machine frame (4), said boom having a plurality of boom arms (8,10,12) pivotally connected to each other, and an excavator bucket (16) pivoted to a free end of the boom (6),
    characterized in that
    a milling/mixing rotor (22) is arranged on the excavator bucket (16) and that the volume surrounded by the excavator bucket (16) is divided into a receiving chamber (24) for the excavated, material and a mixing chamber (26) surrounding the milling/mixing rotor (22).
  2. Device for excavating and backfilling of soil (44) to be attached to site vehicles comprising a boom (6), an excavator bucket (16) and at least one pivot (18,20) for coupling the excavaoor bucket (16) to the boom (6),
    characterized in that
    a milling/mixing rotor (22) is arranged on the excavator bucket (16) and that the volume surrounded by the excavator bucket (16) is divided into a receiving chamber (24) for the excavated material and a mixing chamber (26) surrounding the milling/mixing rotor (22).
  3. Device according to one of claims 1 or 2 characterized in that a spray device (30) sprays liquid binder into the mixing chamber (26) of the excavator bucket (16).
  4. Device according to claim 3 characterized in that the spray device (30) comprises a plurality of spray nozzles (32) directed towards the milling/mixing rotor (22).
  5. Device according to one of claims 1 to 4 characterized in that the excavator bucket (16) comprises a distribution means (42) for powdered binder.
  6. Device according to claim 5 characterized in that the excavator bucket (16) comprises a storage chamber (38) for powdered binder.
  7. Device according to one of claims 1 to 6 characterized in that in the working direction of the milling/mixing rotor (22) downstream of the milling/mixing rotor (22) a rotary lock (42) conveying powdered binder from the storage chamber (38) is arranged as distribution means.
  8. Device according to one of claims 1 to 7 characterized in that a control unit controls the path of the excavator bucket (16) in dependence on the position of the boom arms (8,10,12,14) with the given milling depth being adjusted.
  9. Device according to one of claims 1 to 8 characterized in that a segment of the milling/mixing rotor (22) in the excavator bucket (16) is surrounded by a circularly curved covering hood (23) defining the mixing chamber (26).
  10. Device according to claim 9 characterized in that the milling/mixing rotor (22) is mounted in the side walls (28) of the excavator bucket (16) laterally defining the covering hood (23).
  11. Device according to one of claims 1 to 10 characterized in that the milling/mixing rotor (22) comprises round-shank chisels (25), paddles or knives on its circumferential face.
  12. Device according to one of claims 10 or 11 characterized in that the spray device (30) comprises one or a plurality of spray unit/spray units (32) integrated in the covering hood (23).
  13. Process for excavating and backfilling of soil (44), in particular for laying of pipes (46) in ditches, with the steps of
    excavating soil (44) to form a ditch,
    removing the excavated material,
    preparating a supporting layer for the pipes (46) in the soil (44),
    placing and embedding the pipes (46) in a grit or gravel layer (48),
    backfilling the ditch with filler (50),
    packing the filler (50), and
    applying a top layer (54,58)
    characterized by
    digging a fist ditch section (52), removing the excavated material, preparing a supporting layer in the first ditch section (52) as well as placing and embedding in a conventional way pipes (46) in the grit and gravel layer (48) in the first ditch section (52),
    milling subsequent ditch sections (56) in several layers (40) at a given milling depth simultaneously loosening and mixing the milled material with binder being added,
    excavating the previously milled and treated layer (40), and
    using the treated material as filler (50) in the previous ditch section (56).
  14. Process according to claim 13 characterized in that the ditch section (56) to be dug upstream of the pipes (46) is first milled at a given milling depth, loosened as well as comminuted and mixed, with liquid or solid binders being added, by means of the milling/mixing rotor (22) integrated in the excavator bucket (16), that the treated material capable of being packed is subsequently excavated by the excavator bucket (16) and placed as filler (50) onto the pipes (46) located upstream of said ditch section (56) as seen in the working direction.
  15. Process according to one of claims 13 or 14 characterized in that excavation of the soil (44), milling, loosening and mixing, excavation of the material previously prepared in the first ditch section (52) and backfilling the treated material as filler (50) in the following ditch sections (56) are carried out by an excavator bucket (16) comprising an integrated milling/mixing rotor (22).
  16. Process according to one of claims 13 to 15 characterized in that the excavator bucket (16) travels along one and the same path reproducibly preset by a control unit and applies one and the same working depth during milling, loosening, mixing and excavating the milled material.
  17. Process according to one of claims 13 to 15 characterized in that the liquid and/or powdered binder is continuously supplied to the excavator bucket (16) during milling the following ditch layers (56).
EP19980929295 1997-06-28 1998-05-12 Device and method for excavating and redepositing earth Expired - Lifetime EP1012409B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE1997127549 DE19727549C2 (en) 1997-06-28 1997-06-28 Device and method for excavating and backfilling of soil
DE19727549 1997-06-28
PCT/EP1998/002756 WO1999000555A1 (en) 1997-06-28 1998-05-12 Device and method for excavating and redepositing earth
CA 2293958 CA2293958C (en) 1997-06-28 2000-01-06 Device and process for excavating and backfilling of soil

Publications (2)

Publication Number Publication Date
EP1012409A1 EP1012409A1 (en) 2000-06-28
EP1012409B1 true EP1012409B1 (en) 2002-09-04

Family

ID=25681450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980929295 Expired - Lifetime EP1012409B1 (en) 1997-06-28 1998-05-12 Device and method for excavating and redepositing earth

Country Status (8)

Country Link
US (2) US6312194B1 (en)
EP (1) EP1012409B1 (en)
JP (1) JP3957328B2 (en)
AT (1) AT223541T (en)
CA (1) CA2293958C (en)
DE (1) DE19727549C2 (en)
ES (1) ES2183379T3 (en)
WO (1) WO1999000555A1 (en)

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US7186059B2 (en) * 2003-04-22 2007-03-06 Tommy Barnes Padding machine and method of use
US20060243303A1 (en) * 2003-06-06 2006-11-02 Harr Technologies, Llc Drainage structure cleaning tool and method
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Also Published As

Publication number Publication date
EP1012409A1 (en) 2000-06-28
CA2293958A1 (en) 2001-07-06
JP2002506496A (en) 2002-02-26
AT223541T (en) 2002-09-15
JP3957328B2 (en) 2007-08-15
US20020025228A1 (en) 2002-02-28
DE19727549A1 (en) 1999-02-04
CA2293958C (en) 2008-01-08
DE19727549C2 (en) 2000-03-02
US6312194B1 (en) 2001-11-06
US6530723B2 (en) 2003-03-11
ES2183379T3 (en) 2003-03-16
WO1999000555A1 (en) 1999-01-07

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