Energy-consuming earthquake-resistant prestressed anchor cable

Abstract

The invention discloses an energy-consuming earthquake-resistant prestressed anchor cable which comprises an anchorage section, a free section and an energy-consuming anchorage device; a guide end head is formed at the tail end of the anchorage section, and grouting is carried out by a grouting pipe to anchor the anchor cable in a bed rock; the free section can apply a prestress by a jack; and theenergy-consuming anchorage device consists of an anchor, a high-strength compression spring, a lead core, an anchorage sleeve and an anchor backing plate. The anchor cable sequentially passes throughthe anchor backing plate, the lead core and an opening on the anchor, and is anchored on the anchor after the tensioning jack applies the prestress. When an earthquake occurs, sliding mass slides soas to squeeze the anchor backing plate, the high-strength compression spring and the lead core in the energy-consuming anchorage device are squeezed out of a hole of the anchorage sleeve, squeezing energy consumption is generated, and meanwhile, friction energy consumption occurs between the lateral surface of the anchor and the inner wall of the anchorage sleeve, so that earthquake energy can beeffectively consumed. By squeezing the high-strength spring, a length of the free section of the anchor cable is increased and a certain displacement is allowed to occur to the sliding mass, so that atensile failure of the anchor cable can be effectively avoided, thereby fulfilling the aim of resisting to the earthquake, consuming energy and protecting the anchor cable.

Description

technical field [0001] The invention relates to an anchor cable structure, in particular to an energy-consuming anti-seismic prestressed anchor cable, which belongs to the anti-seismic field of slope engineering. Background technique [0002] Prestressed anchor cables are widely used in side landslide control projects. Compared with completely rigid support structures such as anti-slide piles and retaining walls, prestressed anchor cables can undergo a certain elastic displacement under earthquake action, so they have better performance. Anti-seismic performance. For example, an energy-dissipating self-adaptive anti-seismic anchor cable structure and its implementation method are disclosed in the Chinese Invention Patent No. 201410751411.4. [0003] However, when an earthquake occurs, the landslide body usually produces a large displacement, which is greater than the elastic displacement limit of the prestressed anchor cable, causing the anchor cable to be broken or the anc...

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