阅读说明：本技术 防水砼水平缝处混凝土密实施工方法 (Concrete density construction method at horizontal seam of waterproof concrete ) 是由 王浩航 赵缙 于 2021-09-15 设计创作，主要内容包括：本发明涉及工业建筑旋流井的逆作法施工,具体是一种能够保证水平施工缝混凝土密实度的防水砼水平缝处混凝土密实施工方法。对旋流井上段土方进行开挖,将钢筋绑扎,在旋流井的筒壁内部处焊接止水板；在止水板上间隔设置倾斜布置的注浆导管；灌入砂垫层,使得砂垫层没过止水板的中部；支模板,上段混凝土浇筑；对旋流井下段土方进行开挖,剔除砂垫层,将钢筋绑扎；支模板,下段混凝土浇筑；在上下两段混凝土接茬处通过注浆导管进行注浆。本发明通过止水板和注浆导管,使得在接茬处进行密实施工更加方便,施工操作简单方便,节约工期,通过止水板与注浆导管注入的泥浆相互配合,使得上下两端混凝土施工缝接茬严密,防水效果好。(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. Excavating earthwork at the upper section 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; grouting guide pipes which are obliquely arranged are arranged on the water stop plate at intervals; pouring a sand cushion layer to enable the sand cushion layer to sink over the middle of the water stop plate; erecting a formwork and pouring concrete at the upper section; excavating the earthwork at the lower section of the cyclone well, removing a sand cushion layer, and binding reinforcing steel bars; supporting a template, and pouring concrete at the lower section; and grouting at the joint of the upper and lower sections of concrete through grouting pipes. According to the invention, the water stop plate and the grouting guide pipe are adopted, so that compact construction is more convenient at the joint, the construction operation is simple and convenient, the construction period is saved, and the water stop plate and the slurry injected into the grouting guide pipe are matched with each other, so that the joint of the concrete construction joints at the upper end and the lower end is tight, and the waterproof effect is good.)

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.

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.