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Anchoring hole structure in covering layer and construction method thereof

A construction method and covering layer technology, which is applied in the direction of infrastructure engineering, excavation, soil protection, etc., can solve the problems that anchor holes cannot be implemented and the conditions for forming holes in the covering layer are poor, and achieve the effect of enhancing temporary and long-term operation effects

Inactive Publication Date: 2019-07-12
POWERCHINA ZHONGNAN ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The hole-forming condition of the overburden is very poor, making the anchor hole impracticable

Method used

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  • Anchoring hole structure in covering layer and construction method thereof
  • Anchoring hole structure in covering layer and construction method thereof

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Embodiment 1

[0023] like figure 1 As shown, an embodiment of the anchorage hole structure in the covering layer of the present invention includes a hole body, a steel arch 1 is arranged on the top and sides of the hole body, and a reinforced concrete main structure 7 is backfilled inside the hole body, and the reinforced concrete main structure 7 is combined with the steel A contact grouting layer 6 is set between the arch frame 1 and the bottom of the cave, and a drainage system is set on the top of the cave body. The drainage system includes drainage pipes 2 around the cave, which are located on the top and side of the cave. Axial drain pipe 4. Drainage holes 2 around the cave adopt the principle of layout of the whole cave, and the row spacing is 2.5m. The drainage pipes 2 around the cavern pass through the steel arch 1 and extend to more than 1m into the covering layer, and multiple drainage holes are opened on the drainage pipes 2 around the cavern. (not shown in the figure), the en...

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Abstract

The invention discloses an anchoring hole structure in a covering layer and a construction method thereof. The anchoring hole structure comprises a hole body, the top portion and the side surface of the hole body are provided with multiple steel arches (1), the hold body internally backfills a reinforced concrete main structure (7), contact grout blankets (6) are arranged among the reinforced concrete main structure, the steel arches and the bottom of the hole, the contact grout blankets are internally provided with grout pipes (5) along the length of the hole body and the top portion and sidesurface of the hole body are provided with drainage systems for discharging seepage water. In construction, the steel arches are supported after an anchorage hole is excavated, then drain pipes are buried in advance, the reinforced concrete main structure is backfilled and finally, contact grouting is conducting. According to the anchoring hole structure, not only the geological conditions of thecovering layer are fully considered, the conditions of the anchorage hole in the covering layer are improved as far as possible, so that the anchorage hole in the covering layer can be constructed smoothly, but temporary and long-term operation effect of the anchorage hole is enhanced, and anchoring and shear effect of the anchorage hole can be fully played.

Description

technical field [0001] The invention relates to slope reinforcement in water conservancy and hydropower projects, in particular to an anchor hole structure in a covering layer and a construction method thereof. Background technique [0002] As a kind of mass concrete passing through the weak structural surface, the anchor hole has high shear strength, which can effectively improve the strength of the deep weak structural surface and improve the stability of the slope against sliding. Its common shape is rectangle, city gate type and so on. [0003] Covering layer refers to the loose accumulation and sediment of various origins covering the bedrock, such as sand pebble gravel layer, sandy soil layer and artificially filled gravel soil. The hole-forming condition of the overburden is very poor, so the anchor hole cannot be implemented. Contents of the invention [0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/20E02D3/10E02B3/12
CPCE02B3/12E02D3/10E02D17/20
Inventor 胡娟刘昊
Owner POWERCHINA ZHONGNAN ENG
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