Pre-buried pipeline anchor sealing construction method of reversed anchor pocket

Abstract

The invention discloses a pre-buried pipeline anchor sealing construction method of a reversed anchor pocket. The pre-buried pipeline anchor sealing construction method comprises the following steps that firstly, before a pretressed concrete structure is poured, at least one pipeline which can directly abut against the highest position of the reversed anchor pocket to be formed from the top face of the pretressed concrete structure is fixed; secondly, after the pretressed concrete structure is poured and solidified, a formwork is used to seal the reversed anchor pocket; and thirdly, concrete is poured into the anchor pocket through the pre-buried pipeline. The anchor sealing formwork is fully closed for one time. Vibrating is conducted through an attached vibrator. The integrity of an anchor sealing body is good. The concrete is poured from top to bottom. Bubbles produced by vibrating of the concrete can be discharged out of the reversed anchor pocket through the pre-buried pipeline. The anchor sealing body makes full contact with the interface of original concrete, and holes and fall-off faces do not exist, therefore the anchor sealing body can well isolate corrosion of water vapor in the air to a prestressed anchorage device, and structural durability is strengthened.

Description

technical field [0001] The invention relates to the field of prestressed construction. More specifically, the present invention relates to a pre-embedded pipeline anchor sealing construction method with undercut anchor holes. Background technique [0002] Before the prestressed concrete structure is subjected to the external force load, it is artificially pressured, and the resulting prestressed state is used to reduce or offset the tensile stress caused by the external load, that is, by means of the higher compressive strength of the concrete. Strength to make up for its lack of tensile strength, to achieve the purpose of delaying the cracking of concrete in the tension area, and it is more and more widely used in various construction projects, especially in the construction process of cable bridges. However, Since the anchorage is fixed on the lower slope of the prestressed structure, the anchor hole exists on the concrete surface in the form of an undercut. If the conven...

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Problems solved by technology

[0002] Before the prestressed concrete structure is subjected to the external force load, it is artificially pressured, and the resulting prestressed state is used to reduce or offset the tensile stress caused by the external load, that is, by means of the higher compressive strength of the concrete. Strength to make up for its lack of tensile strength, to achieve the purpose of delaying the cracking of concrete in the tension area, and it is more and more widely used in various construction projects, especially in the construction process of cable bridges. However, Since the anchorage is fixed on the lower slope of the prestressed structure, the anchor hole exists on the concrete surface in the form of an undercut. If the conventional method is used to close the formwork to pour the anchor concrete, there will be the following problems: the formwork cannot be completely filled in order to leave the concrete pouring hole. Closed; under the action of gravity; when the concrete is poured, it cannot fit the original concrete surface or there is a cavity above the anchor hole after the concrete is vibrated, so that the anchor concrete cannot block air and water to protect the anchor, and even the anchor concrete drop

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