DE202005009333U1 - Hinge for a concrete anchoring element for external tensioning parts comprises a hinge bolt lying in the longitudinal direction for joining both parts of a structure - Google Patents

Abstract

Hinge comprises a hinge bolt lying in the longitudinal direction for joining both parts of a structure. The hinge axis follows a deviating radius to produce a low tilting movement.

Description

1.) Technical area:

construction, Prestressing concrete solid components with external tendons The external tendons are building supervision by the respective manufacturers authorized.

2.) Prior art:

all Standards for Construction, in particular: DIN 1045, DIN 1045-1, DIN 4227, DIN 18800 literature of the Federal Ministry of Transport (BMV): ZTV-K, ZTV-ING, Policy for Concrete bridges with external tendons, ARS (General Circular of the BMV).

approvals for external Tendons of the respective manufacturers (for example SUSPA Draht-Ex, VBF-Mettingen CMM-D).

3.) problem:

At the Prestressing of concrete components with external tendons must be the Tendons on the superstructure the bridge anchored. Especially with reinforcement of older bridges, evlt. also for the future new construction of girder bridges with external tendons are, in the absence of other anchoring options (e.g., cross member), subsequent Anchoring element made of concrete necessary. Here are the external ones Anchored tendons. The power transmission to the existing Structure is over Friction. For this, the concrete is roughened on the existing structure and drilled holes for receiving transverse tendons. Subsequently, will the anchoring element concreted against the existing concrete. After this hardening Traverse tendons are used and both components against each other curious; excited. The size and number the transverse tendons hangs on the size of the external longitudinal prestressing from.

The Making the anchoring elements on site is complicated and expensive. They are scaffolding necessary.

4.) invention:

The "prefabricated Anchoring element made of concrete for external tendons " from a concrete block, which is a precast concrete part including all necessary built-in parts and reinforcing steel reinforcement is prefabricated. The block is used to receive and forward forces one to three external tendons. The power transmission to the existing structure over Friction. For this purpose, both the existing structure in the area of Grooved as well as the anchoring element roughened or profiled. The anchoring element is with transverse tendons against the existing component curious; excited. The size of the biasing forces after the male longitudinal forces from the external bias.

Of the Installation of the anchoring elements is done with the help of trusses, through the top opening of the external tendons are pushed. After installation, the Contact joint with mortar shed. Subsequently The transverse tension members are tensioned and pressed.

5.) Commercial Applications:

application for example, externally managed Tendons on bridges as well as the reinforcement of existing bridge structures with external tendons.

6.) Advantageous effect the invention:

The expensive manufacturing on site of the anchoring elements is omitted, i. no scaffolding, no formwork and no reinforcement work on site necessary. In addition, can a considerably shortening the time of manufacture.

7.) Possibility of execution (s. also drawing):

The "prefabricated Anchoring element made of concrete for external tendons "can e.g. For the reinforcement an existing concrete / prestressed concrete bridge can be used.

The "prefabricated Anchoring element made of concrete for external tendons " from a concrete block, which is a precast concrete strength class C30 / 37, C35 / 45 or C45 / 55 including all necessary installation parts and reinforcing steel reinforcement is prefabricated. The size is up to you after the longitudinal and transverse tendons: width between 0.40 and 0.80 m; Height between 0.60 and 2.00 m; length between 1.00 and 3.50 m.

The associated described in the respective approvals of the tendons required bushings (eg PE pipe) at the anchor points, steel helix and anchor plates, and sheaths for the transverse tendons are factory installed in the anchoring element. Likewise, the statically required reinforcement or the minimum reinforcement is installed. In addition, threaded sleeves are installed in the area of the contact joint. The component is then concreted. In the area of the contact joint a profiling with trapezoidal strips is arranged. The profiling takes place perpendicular to the direction of the external tendons. Before complete hardening, the contact joint is additionally reinforced by or ultra-high pressure water jets roughened. The concrete is exposed except for the grain skeleton. The threaded sleeves receive screws (set screws).

Of the Concrete in the area of the contact joint of the existing structure also becomes with high or high pressure water jets roughened and exposed to the grain skeleton. Im present Concrete structure are holes for receiving the transverse tendons drilled. The diameter of the holes must be at least as large like that in the associated Approvals stated cladding tube. Before installing the anchoring element, the roughened surfaces are closed drench.

Of the Installation of the anchoring elements is done with the help of trusses, through the top opening of the external tendons are pushed. To the trusses can chain hoists or Ropes are struck. The anchoring elements are now with Hoists to the required location of the existing structure brought. To secure the position one or more formwork anchors in the holes and recesses the transverse tendons are inserted and tightened. Aligning The anchoring element is done by turning in and out of the screws and in height through the hoists. After aligning the anchoring element sealed or switched off in the area of the contact joint. Connecting will be the fugue with a fast hardening grout filled or pressed. The strength of the grouting mortar depends on the in the tendon certifications and in the associated standards specified minimum compressive strengths. After reaching the required compressive strength of the grouting mortar the transverse tensioning elements successively installed and tense. After that will be the transverse tendons according to their Approval with mortar pressed.

➀

rear anchoring

➁

Single bar tendon according to approved procedure

➂

Precast concrete (Concrete ≥ C35 / 45)

➃

external Tendon according to approved procedure

➄

available concrete component

➅

pipe (round or square, depending on the clamping method)

➆

Surface with Roughened high pressure water jets

➇

gearing

➈

With mortar pressed contact joint

Claims (1)

Joint: Essential feature of the invention is the arrangement of a joint by a hinge pin, the connects both parts of the construction hinged together. hereby the manual alignment of the construction is avoided - the construction judges itself according to the deflection angle. The hinge pin becomes longitudinal arranged centrally, so that the adjacent construction symmetrical is charged. The hinge axis is as close as possible to the deflection radius (i.e., at the contact surface Deflection shell - tendon) to arrange (between 0 and R / 20) to the lowest possible overturning moment to create. Size and material of the hinge pin depend on static requirements (i.e. Size of the deflection force, absorbed lateral force).