CN113756371A - Concrete dense construction method at horizontal joints of waterproof concrete - Google Patents

Abstract

The invention relates to the reverse method construction of swirling wells in industrial buildings, in particular to a concrete dense construction method at the horizontal joints of waterproof concrete which can ensure the concrete compactness of horizontal construction joints. The earthwork in the upper section of the swirl well is excavated, the steel bars are bound, and the water stop plate is welded on the inside of the wall of the swirl well; the inclined grouting conduits are arranged on the water stop plate at intervals; The cushion does not pass the middle of the water stop plate; the formwork is supported, and the upper section is poured concrete; the earthwork in the lower section of the swirl shaft is excavated, the sand cushion is removed, and the steel bars are bound; the formwork is supported, and the lower section is poured concrete; Grouting is carried out through the grouting conduit. The invention uses the water stop plate and the grouting conduit to make the dense construction at the stubble more convenient, the construction operation is simple and convenient, and the construction period is saved. The stubble is tight and the waterproof effect is good.

Description

Concrete density construction method at horizontal seam of waterproof concrete

Technical Field

The invention relates to reverse construction of an industrial building cyclone well, in particular to a concrete density construction method for a waterproof concrete horizontal joint, which can ensure the concrete density of the horizontal construction joint.

Background

At present, the construction of the domestic industrial building cyclone well and the like generally adopts an open caisson method, a forward method and a reverse method; the open caisson method construction is not suitable for areas with hard soil and rock layers, the requirements of the forward working rule on the stability of deep foundation pit side slopes, the underground water level and the like are very strict, at the moment, the reverse working method is optimal, and the water resistance of the waterproof concrete is controlled to be the highest; usually, the added bell mouth is adopted to pour concrete to ensure the waterproofness of the structure, but the method is not compact in vibration and difficult to ensure the compactness of the concrete outside the water stop plate, so that the waterproofness of the water stop plate is difficult to ensure, and the effect is not good.

Disclosure of Invention

The invention aims to solve the problems, and provides a concrete density construction method for a waterproof concrete horizontal joint, which can ensure the concrete density of the horizontal construction joint.

The invention solves the problems and adopts the technical scheme that:

a concrete density construction method for a horizontal seam of waterproof concrete is carried out according to the following steps:

excavating the upper earthwork of the cyclone well, binding reinforcing steel bars, and welding a water stop plate at the inner part of the wall of the cyclone well;

secondly, obliquely arranged grouting guide pipes are arranged on the water stop plate at intervals, and the top ends of the grouting guide pipes are exposed and positioned on the inner side of the swirl well;

sealing the lower end of the grouting guide pipe by using an adhesive tape;

step four, pouring a sand cushion layer to enable the sand cushion layer to be submerged in the middle of the water stop plate;

step five, supporting a template, performing reverse construction on the upper section of the cyclone well, and pouring concrete on the upper section;

excavating earthwork at the lower section of the cyclone well, removing a sand cushion layer, and binding reinforcing steel bars;

step seven, a template is erected, reverse construction of the lower section of the cyclone shaft is carried out, and concrete is poured on the lower section;

and step eight, grouting at the joint of the upper and lower sections of concrete through grouting guide pipes.

Compared with the prior art, the invention adopting the technical scheme has the outstanding characteristics that:

the water stop plate and the grouting guide pipe are used, so that dense construction at the joint is more convenient, the construction operation is simple and convenient, and the construction period is shortened.

Secondly, the water stop plate is matched with slurry injected by the grouting guide pipe, so that concrete construction joints at the upper end and the lower end are connected tightly, and the waterproof effect is good.

Drawings

FIG. 1 is a schematic cross-sectional view of a wall of a cyclone wellbore in accordance with an embodiment of the present invention.

In the figure: a cylinder wall 1; a grouting guide pipe 2; a water stop steel plate 3; a sand cushion layer 4.

The specific implementation mode is as follows:

the invention will be further illustrated by the following examples, which are intended only for a better understanding of the present invention and therefore do not limit the scope of the invention.

Referring to fig. 1, a concrete density construction method for a horizontal seam of waterproof concrete is carried out according to the following steps:

excavating the earthwork at the upper section of the cyclone well, binding reinforcing steel bars, and welding a water stop steel plate 3 at the inner part of the wall 1 of the cyclone well;

step two, welding phi 60 grouting guide pipes 2 which are obliquely arranged on a water stop steel plate 3 at intervals, wherein the interval between every two adjacent grouting guide pipes 2 is 1000mm, and the top ends of the grouting guide pipes 2 are exposed and positioned on the inner side of the swirl well;

sealing the lower end of the grouting guide pipe 2 by using an adhesive tape;

step four, pouring a sand cushion 4 to ensure that the sand cushion 4 is submerged in the middle of the water stop steel plate 3;

step five, supporting a template, performing reverse construction on the upper section of the cyclone well, and pouring concrete on the upper section;

excavating earthwork at the lower section of the cyclone well, removing a sand cushion layer 4, and binding reinforcing steel bars;

step seven, a template is erected, reverse construction of the lower section of the cyclone shaft is carried out, and concrete is poured on the lower section;

and step eight, grouting at the joint of the upper and lower sections of concrete through the grouting guide pipe 2 to achieve a compacting effect.

According to the invention, the water-stopping steel plate 3 and the grouting guide pipe 2 are adopted, so that the compact construction at the joint is more convenient, the construction operation is simple and convenient, the construction period is saved, and the concrete construction joints at the upper end and the lower end are tightly jointed through the mutual matching of the water-stopping steel plate 3 and the slurry injected into the grouting guide pipe 2, and the waterproof effect is good.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.

Claims (1)

1. A concrete density construction method at a horizontal seam of waterproof concrete is characterized by comprising the following steps:

excavating the upper earthwork of the cyclone well, binding reinforcing steel bars, and welding a water stop plate at the inner part of the wall of the cyclone well;

secondly, obliquely arranged grouting guide pipes are arranged on the water stop plate at intervals, and the top ends of the grouting guide pipes are exposed and positioned on the inner side of the swirl well;

sealing the lower end of the grouting guide pipe by using an adhesive tape;

step four, pouring a sand cushion layer to enable the sand cushion layer to be submerged in the middle of the water stop plate;

step five, supporting a template, performing reverse construction on the upper section of the cyclone well, and pouring concrete on the upper section;

excavating earthwork at the lower section of the cyclone well, removing a sand cushion layer, and binding reinforcing steel bars;

step seven, a template is erected, reverse construction of the lower section of the cyclone shaft is carried out, and concrete is poured on the lower section;

and step eight, grouting at the joint of the upper and lower sections of concrete through grouting guide pipes.

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