DD150635A1 - METHOD AND ARRANGEMENT FOR SECURING PITCH WINDINGS THROUGH TECHNICAL TEXTILES - Google Patents

Abstract

The invention relates to a method and an arrangement for the economic protection of walls made in loose rock excavation with technical textiles (knitted fabrics, nonwovens, nets). The aim of the invention is to secure a Baugrubenwaenden by Verhaengung with technical textiles that are held either by punctiform needling or Brusthoelzer and stiffeners. The essence of the invention consists in the fact that the fabric webs fastened and overlapping on the terrain surface are rolled from top to bottom as the trench excavates progressively along the trench walls to be secured, and are held in place by wide steel trenches hammered into the trench wall. In the case of narrow excavations and trenching, securing the textile-supported excavation walls is done by chest hoists held by stiffeners. All construction parts of the excavation pit can be completely recovered. This invention can be applied to pits of any size and for the temporary securing of terrain jumps, Boeschungen and natural hangs.

Description

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Dr.so.techn · Claus Göbel Dresden, 12 · Ο5.19ΟΟ

Dipl "-ing. Fritz Plesker

Title of the invention

Method and arrangement for securing construction pit walls by technical textiles

Field of application of the invention

The invention relates to a method and an arrangement for the economic protection of Baugrubenwanden by technical textiles (Gewirkeι nonwovens, Netse). It is applicable for the sioherung of walls of arbitrarily large excavation pits, which are manufactured in the Lockergesteicsbaugruüd ·

Characteristic of the Known Technical Solutions It is known that steel and reinforced concrete sheet piles, beam girder walls, bored pile walls and shingle walls as well as various trench mounting systems are used to secure construction pit walls as a function of the width and depth of the excavation pit and subsoil conditions. Since excavations are usually removed after completion of the structure and the excavation walls thus represent temporary members, the conventional constructions are economically complex. For example, rams are required for the manufacture of sheet pile walls and ureteral pile walls and special complicated mechanisms are required for the construction of tubular and slotted walls. The removal of these excavation walls after completion of the in the excavation too. Establishing Вашуегкз requires special drawing equipment bsw »Sprzaxaxen _f v / oswegen dio excavation walls

in the Ргахіз often not be recovered * Low dom associated large consumption of steel, wood and concrete anchoring are still consuming or _# Aussteifungsoaßnahmen provide for deep excavations.

For the protection of walls of smaller construction pits and trenches, special construction systems made of steel and wood have been developed, which correspond to the temporary character of excavation pit walls. Their disadvantage is that these constructions are so heavy that they can not always be manually installed and removed.

Object of the invention

The aim of the invention is to achieve a security of construction pit walls duroh imposition with technical textiles, which are held either by punctiform needling or stiffening ssu,

Explanation of the essence of the invention

Task dor invention is to replace conventional, relatively massive Baugrubenwande steel, wood and concrete duroh lightweight Textilbahnon ssu and provide constructive solutions for securing äioser textile-imposed excavation walls «Brfindungsgemäß this object is achieved in that with progressive excavation of the excavation on the ground surface fixed textile webs whose length must be at least as large as the depth of the excavation, rolled from top to bottom of the excavation wall and held in horizontal planes punctiform or linear. For wide construction pits that do not allow internal reinforcement, the securing of the Toxtil suspension is ensured by punctiform needling, which are knocked or pushed from the excavation into the construction pit wall. These needles are made of steel and have a round or rectangular shape and the nuts, which fix the needles to the pit wall, are arranged on the steel underlay for load distribution. The active earth pressure generated at the excavation pit wall is absorbed by the suggestive textile bonnon and is transmitted via the base plates and detachable fasteners.

transferred transfer elements in the Yernadelungen. The traction © arising in the needles is dissipated into the subsoil by friction between steel needles and loose rock. · In this way, a reinforced earth body is created behind the excavation wall, which is inherently stable «For narrow excavation pits where internal reinforcement is possible and sensible According to the invention, when backfilling the excavation pit, the securing of the construction pit wall is easily eliminated by removing the punctiform or linear supports as the backfilling progresses from below Textile webs are rolled up. Thus, the entire excavation pit can be recovered and reused for another excavation.

Ausführungsbeinpiel

The invention is explained in more detail below using an exemplary embodiment which includes two characteristic possibilities of its application. In don associated drawings shows;

Fig * 1 the echeraatiache representation (section) securing the wall of a wide pit with punctiform needling of the textile hanger

Fig. 2 shows the view of the wall of a wide pit with punctiform needling textile suspension Flg » 3 the schematic representation (section) securing the walls of a narrow excavation with a Textilverhängung which is held by Brusthölaer and stiffeners

Fig. 4 shows the view of the wall of a narrow excavation with a Textilverhängung which is held duroh breasts and stiffeners.

1, For the construction pit wall shown in Pig, 1 with punctiform needling of the Textilverhängung the following Verfahrensschritt o are distinguished during the production:

- Attaching the textile webs to the surface surface with wooden wedges 1 or other fasteners}

- Excavation of the excavation until the first needling 2 and rolling out of the excavation ibid сгп 3j

- Impacting or pressing in the needles, placing the base plates 4 and fitting and solid nuts 5 J

- further excavation of the excavation until the second needling 6 and so on up to the planned excavation pit bottom 7 ·

The individual Textilbahtfen be with overlaps 8 ver ^ Le ^ Ute alch. behind, d. haflruleru BiA horizontal and vertical spacing of needling depends on the web width of the textile and the properties of the looseness (see Fig. 2) ·

The excavated wall, shown in Fig. 3, with a textile suspension supported by wicks and stiffeners, is made by the following method:

- Auöhub the pit atf-f a small depth and rolling out of the textile webs 3;

- Laying the Brusthb'ltfe * 9 and introducing the first Stsifenlage 10;

- Further excavation of the excavation, further rolling out of textile webs 3 and installation of the second layer of stiffening 11 and so on up to the planned excavation pit bottom 7 »

The individual Textilbahuen be laid with overlaps 8 (Fig, 4).

Claims (2)

Invention claim. 1 · Method and arrangement for Sioherung of excavation walls duroh technical textiles, characterized in that attached to the terrain surface and overlapping textile webs with progressing excavation of the excavation on the excavation pit walls to be secured rolled from top to bottom and steel needles deep enough in the excavation wall be beaten or pressed, held and that as the excavation progresses from bottom to top, the steel needles are pulled and the textile webs are rolled, so that the entire excavation pit can be recovered » 2 »Arrangement for the realization of the method naoh point 1., characterized in that the securing of the textile-imposed excavation pit walls in narrow construction pits and trenches by horizontal breasts, which are duroh stiffeners, takes place» 4 sheets of drawings