HUP9901683A2 - Procedure for trench preparation with wire rope applicable in public utility construction without covering, as well as for placing a pull-in rope connected to a utility line expansion tool - Google Patents

Abstract

Procedure for wire-rope cutting training, applicable in unexposed utility construction, as well as for the placement of pull-in ropes, where the drive (H) and receiving shafts (F) connected along the unexposed utility route are connected by a cutting-rope device (1) with an endless wire rope track guided by drive (2) and diverter-tensioner (3) rollers. (4) A 0.5-1.5 cm wide cutting slot (V) is created, and then the expansion tool (7) connected to the utility line (6) to be laid is pulled along with the reinforced pull-in rope (5) placed in the thus formed trench - assigned to the cutting equipment. HE

Description

P 9 9 Ο 1 6 8 3 u.'.-·· · ^:: · ^::

PUBLICATION COPY

PROCEDURE APPLICABLE FOR PUBLIC WORKS CONSTRUCTION WITHOUT CLEANING

FOR WIRE ROPE SECTION TRAINING, AS WELL AS - PUBLIC WORKS

CONNECTED TO EXPANSION TOOL - FOR PLACEMENT OF TIGHTENING ROPE

The invention relates to a method for preparing a wire rope trench for use in public utility construction without covering it, and for placing a pulling rope — connected to a public utility line expansion tool — when laying new public utility lines, or when repairing old lines and pulling public utility lines in their place. It is known that a significant part of vital infrastructure is located underground. It is a common problem - primarily in cities - that public utility pipelines have to be sunk into the ground. This is most often done in a dug trench, a so-called open trench, when a groove is cut from the ground level to the underground level at which the public utility line is to be laid and installed. The trench is then broken up and the road is restored. This method is a very labor-intensive, slow and expensive activity. In particular, laying pipes across sidewalks and roads disrupts traffic and the restoration of roads requires special professional work.

Dense traffic on public roads and railway lines, limited space, valuable surface areas, vegetation or buildings increasingly force the use of closed, so-called uncovered utility construction technology.

Its economy and thus its competitiveness compared to the open construction method have increased significantly in recent years.

In addition, environmental protection has increasingly demanded the use of underground drilling systems, leading to significant developments in cable and pipeline construction without road excavation.

In the construction of public utilities without covering, the use of mechanical, hydromechanical and pneumatically operated soil drills was the first to become known to avoid breaking up roadways.

Hungarian publication document No. 3426 with deferred examination describes a hydromechanical soil drilling device for laying flexible utilities. With this device, drilling can be carried out in a phased mode on a designated unobstructed route by means of the pressure of a hydraulic cylinder, which presses the drilling head into the ground with great force. After each pressing stage, the hydraulic cylinder is retracted and the drilling rod can be extended by a member, which ensures further forward pressure of the drilling head.

Patent specification HV 502 638 describes a widening device with an expandable segmented shell for widening underground pipes or repairing defects.

A common method of earth drilling without covering is the use of a hammer-type earth drilling torpedo. Such devices are described in the EPA patents 0 494 408; 0 548 588; 0 617 193 and 0 612 912 of the Swiss company TERRA AG, and in the US patents 4 003 440; 4 319 648 and 4 679 637 of the California company CHERRINGTON.

The devices according to the listed descriptions are characterized by the use of an earth-boring tool that includes a percussion hammer within a suitable housing, which is usually torpedo-shaped.

The hammer is pneumatically or hydraulically operated. The earth-boring torpedo is associated with unguided or limitedly steerable devices that do not have a rigid base in the launch shaft and the torpedo housing is supported by the ground resistance during the forward movement of the torpedo. During operation, the earth-boring torpedo does not move the ground, but rather compacts it laterally and punches itself through the ground, while breaking up obstacles. The equipment simultaneously pulls the PVC and other flexible pipes connected to the torpedo into the groove it has created. If necessary, a splitting sleeve is also installed on the earth-boring torpedo, so that gas and water pipelines can be repaired and renovated. The splitting sleeve splits the old pipe and presses it into the ground.

The steerable and controllable pipe-laying equipment has a drill head combined with a special control helmet. An integrated radio transmitter transmits data on the position, inclination and attitude of the drill head control helmet to a receiver on the ground. Such equipment is described in the German company TRACTO-TECHNIK in the EPA patent specification No. 0 216 100; 0 411 278; 0 454 947 and 0 578 942. The function of the above steerable drilling systems is usually guidance, which means that only after the drill head reaches the target is it replaced with an expansion cone or milling head so that when the drill rod is pulled back, the borehole is expanded to the desired diameter and the wire is pulled in. The type and quality of the wire to be pulled in determines the drill head, the subsequent drill rod and the smallest radius of curvature.

Its quality determines the drill head, the subsequent drill rod and the smallest radius of curvature.

Depending on the type of soil with different grain sizes and densities underground, it requires an adapted utility construction technology, which can be carried out with or without soil compaction, statically or dynamically, or with a combination of these.

Drilling fluid, or mud, is a mixture of water and usually bentonite or a polymer that is continuously pumped to the cutterhead to aid in the removal of cut-out soil, stabilize the borehole, cool the cutterhead, and provide lubrication for the insertion of the pipeline.

The dynamic pipe bursting pipe rehabilitation process enables the renovation of old pipelines made of stone clay, concrete, cement and plastic. In this case, the specially designed torpedo head or impact head stretches the old pipe and pushes it into the surrounding soil. The impact head is equipped with a pulling eye, to which a wire rope pulled by an external winch is connected. The latter pulls the impact head into the pipe to be repaired, which bursts it and pulls in the connected pipe of the same diameter or a larger nominal diameter in its place.

The above-described uncovered utility construction technologies and equipment are effective solutions, but require significant investment costs.

The purpose of my inventive method is to replace the high-investment-cost solutions that can only be obtained from Western companies with a significantly cheaper and domestically developed equipment that can be implemented without covering up.

The method according to the invention is based on the recognition that if the tunnel opening is formed with an endless wire rope track guided by driving and guiding rollers, we ensure a previously unknown flexibility in the placement of the pulling rope and the pulling in of the utility line.

I solved the task by creating a 0.5-1.5 cm wide section of the trench with an endless wire rope track connecting the driving and receiving shafts formed along the unobstructed utility line - guided by the driving and guiding rollers of the cutting rope equipment - and then using the reinforced pulling rope placed in the formed trench - assigned to the cutting rope equipment - to pull the expansion tool connected to the utility line to be laid.

I also illustrate the invention with drawings, which show the implementation of the method according to the invention.

Figure 1 illustrates a schematic diagram of the method according to the invention for forming a groove in an endless wire rope track.

Figure 2 shows a top view diagram of the cutting gap formation of the method according to the invention.

Figure 3 illustrates the drawing-in process of a spreading tool connected to a utility line assigned to a pulling rope placed in the formed groove.

Figures 1-3 show that a suitably selected driving shaft H and receiving shaft F are provided on the unobstructed utility line.

The 1-wire cutting machine known from the utility model specification U 98 00 291 is specially arranged - 2-drive and above-ground arrangement, and the H-drive and F-drive

The 3 guide-tensioning rollers extending into the receiving shafts guide an endless wire rope track 4 driven by the drive mechanism of the cable cutting machine 1. With the latter, a V-shaped section, preferably 0.5-1.5 cm wide, is formed in the section between the driving shaft H and the receiving shaft F, starting from the surface - to the planned depth of the section. Due to the known suspension and bedding of the 2 driving and 3 guide-tensioning rollers, as well as the advantageous flexibility of the rope element of the wire rope track 4 - with a previously unknown flexible placement and cutting ability - we ensure that the rope element of the wire rope track 4 reaches the planned laying depth of the underground utility line by performing a minimal amount of earth movement. After this is done, the wire rope track 4 is replaced with a reinforced pulling rope, to which the expansion tool 7 assigned to the utility line 6 to be laid is connected, then the reinforced pulling rope 5 is wound up with the driving mechanism of the rope cutting machine 1 - with the driving roller 2 of the rope cutting machine 1, or with other winch equipment - along the track of the reinforced pulling rope 5 on the lower plane of the cutting slot V, and the expansion tool 7 is guided along the path of the reinforced pulling rope 5 on the lower plane of the cutting slot V, and the utility line to be laid is pulled in through the receiving shaft F.

The rope cutting machine 1 proposed for carrying out the method according to the invention can also be suitably used in a cutting chain version. In this case, the reinforced pulling rope 5 is replaced by a specially designed cutting chain.

The method according to the invention - schematically illustrated in the above figures - can also be advantageously used for the repair and replacement of a faulty, worn-out utility pipeline. At this time, the reinforced pulling rope 5 is introduced into the old utility pipeline, and then the rope cutting machine 1 is pulled into its old place through the reinforced receiving shaft 5 with the driving mechanism. Based on the above, it can be stated that the method according to the invention ensures simple, low-investment, unobstructed utility management and economical use of mainly domestically manufactured equipment.

The flexible system of the process, the space-saving construction of the work pit, and the creation of a minimum width cutting gap of the cutting rope make it optimally applicable on various types of soils - under roads, front gardens, embankments, etc.

Claims (1)

PATENT CLAIMS 1. Method for wire rope trench preparation in unobstructed utility construction, and for placing a pulling rope connected to a utility line expansion tool, characterized in that a 0.5-1.5 cm wide trench gap /V/ is formed with an endless wire rope track /4/ guided by the rollers of the cutting rope device /1/ connecting the driving /H/ and receiving /F/ shafts formed along the unobstructed utility line, and then the expansion tool /7/ connected to the utility line /6/ to be laid is pulled through the trench thus formed with a reinforced pulling rope /5/ assigned to the cutting rope device.