DD151780A1 - HEAD SHAPE FOR TRAINING THE WORKING WALLS IN THE LAYER WALL MANUFACTURING - Google Patents

Abstract

The Erf. refers to a head connection to the working joints in the sectional slot wall production. It can be applied both to construction joints with normal requirements and to water-impermeable construction joints. The preparation of the diaphragm wall can be done without or under suspension. The invention aims to provide a head circuit with a large application width and trouble-free use even with frequent reuse. The object is to provide a variable adaptability without hinges. This is achieved by a basic element made of steel skeleton shots with a triangular cross-section, the base of which rests on the secondary section and whose apex points to the primary section. On both sides extending in the direction of the trench wall, a vertical pipe is arranged in each case, which bears tangentially both on the sides of the triangle and on the respective trench wall.

Description

Title of the invention:

Head formwork for forming the working joints in the slot wall division

Field of application of the invention:

The invention relates to a head formwork for Ausbil tion of the construction joints in the sectional Stützwandherstellung.Die application can also be rdt high working requirements, such. permeability, in the manufacture of the diaphragm wall without or under suspension and in unreinforced or reinforced diaphragm wall sections without continuous reinforcement.

Characteristic of the known techn. Solutions:

When connecting the trench wall section to the sec - ondary section, joint elements to form the working joint are used to secure a seuberon frictional connection of the individual slit sections. If these joints are impermeable to water, then joint tapes are used In the material economy, most reusable formworks are used, which, after concreting the primary section and excavating the secondary section, are removed and reinstalled in the next section.

In clor DBI ~ A3 1,253,992, a tube is provided to "beat, the diameter of the Grabenbreite.entspricht,

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In order to compensate for the unimpeded during excavation width tolerances, the tube is provided with a longitudinal slot and equipped with a spreading mechanism, whereby the overlapped tube shell can be moved against each other.

The disadvantage here is that such a head formwork has a complicated spreading mechanism, which is prone to contamination in addition to the elaborate production. This is especially true when produced under suspension slot walls zu.Als v / ei terer disadvantage, the low width adjustment must be mentioned, since the occurring Tolerances are often larger and thus can not be compensated with this spread v / ground. For different width diaphragm walls an application is not given anyway.

DE-AS 1 272 856, a formwork is also known, which consists of several rhombic Stahlskelettseg elements, wherein as lateral boundary in the joint axis by '.Vasser or preßluf t expandable tubes be fastened werden.Beitie adjustability is greater, there in addition disadvantageous is that the joints quickly pollute and thus can be made feasible only with greater effort.Besonders unfavorable is the durability of the expandable tubes, as these when removing the formwork are exposed to high loads and thus require constant repairs or renewals. The applicability for different trench widths is possible only in very limited gradations.

Object of the invention:

The invention aims to provide a joint formwork for different width slot walls, which has a sufficient resistance to the high mechanical stresses beia removal and without function -

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malfunctions can often be reused.

Explanation of the essence of the invention;

The object of the invention is to achieve a variable Breitenanpaßbarkcit a head formwork with stable, easy to transport and without hinges against each other adjustable formwork elements.

According to the invention the object is achieved in that a steel skeleton with triangular cross-section is arranged as a basic element. The basic element consists of several segments, which are zuso.mmengesponnt according to the desired height by means of clamping screws. Is'it the base of the cross section at the Sekundarab ~ section of the slot trench and the tip points to the Primärärabschnitt.An both in the direction trench wall, ver current sides are arranged vertically tubes tangentially abut both on the sides of the triangle, as well as on the trench wall.

For example, a clock example;

The invention will be explained in more detail below on the basis of an exemplary embodiment . In the accompanying drawing: Pig. 1: the top view of the formwork at Anord

tion of a basic element with isosceles cross section; Pig. 2: the plan view of the fichalung in arrangement

a basic element with skewed

Cross-section.

The head formwork consists of a basic element 1 with triangularCiTi cross section.This can be done as in Pig. 1 ^"7 JO shown an isosceles cross-section, or according to Fig." 2 is a bchiefwinkliger cross section sein.Die base 11 of the cross-section abuts Seicumuirabscanitt the to be constructed slot wall, while the tip 12 to Priruärabuchnitt 3 vveiot.Von dor tip 12 run ver the beiuen Fig. 13 of the triangular cross-section

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in the direction of the trench wall 4. On both sides 13, vertical bores 5 are arranged, which lie tangentially against both the sides 13 and the trench wall 4. The two tubes 5 may have different cross sections, as shown in FIG. If necessary, to achieve water permeability at work joints, the basic elements 1 at the top 12 are equipped with a slot for receiving a sealing strip 6. As the different slot walls to be produced in addition to the differing statically required widths also have different depths, the elements of individual Seg are existing basic elements 1 tensioned by clamping screws 7 to the required length.

Hereinafter, the technology of using the head formwork is erläutert.Zuerst closer carried out the excavation of one or more primary portions of one or more primary portions of the Schlitzwand.An the connection point to the secondary section 2 is the basic element 1 which was to eammengespannt previously to the required length, with a hoist inserted so that the tip 12 to the Prinärabschnitt 3..Beiside the sides of the triangle 13 is a vertical ste Jiendes tube 5 is arranged, which bears tangentially on both the triangle sides 13 and at the Grabenv / and 4. When using pipes whose diameter is half the basic length of the base element, Schiitswandabschnitte can be boarded up to about 1.65 times the width of the base element werden.Bei even wider trenches then pipes With a larger diameter, the basic elements are the same. This allows a wide range of application of these basic elements. "After the concreting of the primary sections, the secondary

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sections excavated and the Grundelemcnt 1 removed with the hoist out of the slot trench and then removed the tubes.Another advantage arises from the fact that the Usftflachen dee primitive 1 are reduced ver with the Eeton the primary side, what the adhesive forces and the requisite power requirement when loosening reduced and thus reduces the stresses on the element. This undoubtedly has a favorable effect on the lifespan.

Claims (1)

- 6 - 222277 'BrfitiduügBanspru.cb. Head form for the «training of the working eye α in the abaeim.ittsweisen. Sb.lit2, preferably, consists of segmentally stacked steel skeletal shots with a triangular cross section , the apex of which is adapted to the prairie, characterized by the fact that the sides in the sifting trench wall (4) face {1? ) Ver - Tikale tubes (5) are arranged, which (to the Breieclcaeitefi 15) and, the respective trench wall (4) abut tangentially. For this 1 page drawings