Cable hoisting machine pre-stress rear anchor

A technology of cable cranes and prestressed anchor cables, which is applied in the direction of cable cranes, cranes, erection/assembly of bridges, etc., and can solve problems such as large engineering volume and occupied area, increased weight and frictional resistance, and large volume of rear anchors , to achieve the effect of small excavation works, flexible use, saving cost and construction period
CN101209804AInactive Publication Date: 2008-07-02CHINA MAJOR BRIDGE ENG
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA MAJOR BRIDGE ENG
Publication Date
2008-07-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

A cable loop wheel machine inherent stress stern anchor relates to a cable loop wheel machine stern anchor used for bridge construction, which consists of threes parts of an anchor eye(3), an inherent stress anchor rope(4) and a concrete stern anchor (2). After being bound by a steel strand, the inherent stress anchor rope 4 is arranged in the anchor eye 3 of a mountain massif. An anchor head 6 is connected with a sylphon bellows 5, a cable 1 and the concrete stern anchor 2. The invention exerts an inherent stress between the concrete stern anchor (2) and the mountain massif. After the concrete stern anchor (2) suffers the pull action of the cable (1), due to the existence of the inherent stress, no pulling stresses exist between the stern anchor (2) and the mountain massif and the stern anchor can not generate displacement, thereby reaching the effect of anchoring. The stern anchor of the invention has the advantages of small size, small displacement as well as cost and construction time saving. The invention is in particular suitable for being adopted at rock ground bases and the locations where large machinery can not be used for constructing.
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Description

technical field

[0001] The invention relates to a rear anchor of a cable crane for bridge construction. Background technique

[0002] The function of the rear anchor of the cable crane is to provide horizontal and vertical restraint reaction forces for the load-bearing main cable and the back cable. According to the characteristics of the force, it is usually divided into two types: gravity type and embedded type. The gravity type rear anchor uses its The self-weight is used as the vertical constraint force, and the frictional resistance between the base and the foundation is used as the horizontal constraint force. In order to increase the weight and frictional resistance, the volume of the rear anchor is usually relatively large, the project volume and floor area are relatively large, and the required cost is relatively high. . The embedded rear anchor mainly relies on the passive earth pressure borne by the front end of the rear anchor as the horizontal restraint force, ...

Claims

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