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Construction method of prestressed anti-floating anchor rod

A technology of anti-floating anchor rods and construction methods, which is applied in the direction of foundation structure engineering, sheet pile walls, protective devices, etc., can solve the problems that the friction resistance between the rod body and the slurry cannot be fully utilized, the design requirements cannot be met, and it is not suitable for use. Achieve the effects of simple structure, large frictional resistance and fast project progress

Active Publication Date: 2012-06-06
SHANGHAI ZHIPING FOUNDATION ENG CO LTD
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  • Claims
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Problems solved by technology

[0003] Because the anti-floating anchors widely used at present have the following two problems: ①The anchor structure uses one or more steel bars to bind and weld without barbs, so the frictional resistance between the rod body and the slurry cannot be fully utilized; ②The hole is formed The construction technology of drilling holes and mud wall protection is often used. It is not easy to form holes in the collapsible soil layers such as gravel and silt, and cannot meet the design requirements; it is not suitable for use in existing basements where old buildings are renovated and there is pressurized water

Method used

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  • Construction method of prestressed anti-floating anchor rod
  • Construction method of prestressed anti-floating anchor rod
  • Construction method of prestressed anti-floating anchor rod

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Embodiment 1

[0019] The basement structure of the original garage in the annex building of Hainan Tianyi International Building is three floors. According to the needs of the garage, it is transformed into a five-story concrete structure beam and slab. The walls, columns, beams, panels and the concrete structure of the south side wall in the side wall of the original underground garage need to be removed. . Adjacent to the south side of the original garage, a newly built six-storey underground garage with a length of 68(L)×30(B)×13(H) meters (the foundation floor is about 1m thick, and the side wall is about 0.5m thick), and the newly added basement is anti-floating. The high-pressure jet grouting method prestresses the anti-uplift anchor rod, and the design value of the pull-out force of the anti-uplift anchor rod in this project is 398KN.

[0020] See attached image 3 , the present invention proceeds according to the following steps:

[0021] (i), first construct the retaining piles a...

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Abstract

The invention discloses a prestressed anti-floating anchor rod and a construction method thereof. The invention is characterized in that alignment steel tubes are arranged in an anchor rod body which is formed by a plurality of steel bars uniformly distributed along the circle, the steel bars are provided with a plurality of barbs, the alignment steel tubes are arranged at intervals along the axis of the anchor rod body and are fixedly connected with the steel bars, the barbs are welded with the steel bars. The construction method comprises the following steps: grouting into piles; arranging the anchor rod; locking the anchor rod; and sealing the anchor. Compared with the prior art, the invention has the advantages of simple structure, convenient construction, good anti-floating effect and low cost, especially being applicable to the reconstruction of old buildings with built underground structures and confined water.

Description

technical field [0001] The invention relates to the anti-floating technical field of underground structures, in particular to a construction method for prestressed anti-floating anchor rods. Background technique [0002] Anchor bolts are widely used in slope stability projects, bridge projects, deep foundation pit projects, tunnels and underground projects at home and abroad because of their low material consumption, fast work efficiency and convenient construction. Structures, buildings, etc., but the application of anchor rods in the anti-floating of underground structures is seldom. With the continuous increase of deep foundation projects, especially for the anti-floating requirements of deep and large basements, the application of anti-lift anchors brings great convenience to construction. The application of anti-uplift bolts in geotechnical anchoring projects in China is still in its infancy, and its corresponding design and construction specifications and acceptance s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D31/12E02D5/74E02D5/58E04G21/12
Inventor 陈富海凌振健
Owner SHANGHAI ZHIPING FOUNDATION ENG CO LTD
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