CN219158979U

CN219158979U - Open caisson reserved hole anti-seepage structure

Info

Publication number: CN219158979U
Application number: CN202320188258.3U
Authority: CN
Inventors: 周春亮; 赵世杰; 冉垂正; 赵昱; 王润泽
Original assignee: Road and Bridge International Co Ltd; Road and Bridge East China Engineering Co Ltd
Current assignee: Road and Bridge International Co Ltd; Road and Bridge East China Engineering Co Ltd
Priority date: 2023-02-09
Filing date: 2023-02-09
Publication date: 2023-06-09
Anticipated expiration: 2033-02-09

Abstract

The utility model relates to a water seepage prevention structure of a reserved hole of an open caisson, wherein the wall of the reserved hole of the open caisson is formed by an embedded steel pipe which is cast with the wall concrete of the open caisson into a whole, an annular water stop steel plate is sleeved on the embedded steel pipe, the inner annular edge of the annular water stop steel plate is tightly welded with the wall of the embedded steel pipe, and the annular water stop steel plate is cast in the wall concrete of the open caisson. The utility model can effectively prevent the water seepage problem between the pre-buried steel pipe of the reserved opening of the open caisson and the concrete of the open caisson.

Description

Open caisson reserved hole anti-seepage structure

Technical Field

The utility model belongs to the technical field of open caisson construction, relates to pipe jacking construction by adopting an open caisson as a working well, and particularly relates to a reserved hole water seepage prevention structure of the open caisson.

Background

The pipe jacking construction method has the advantages of small disturbance to surrounding soil mass, small influence on ground traffic, small damage to environment and the like, and is widely applied to construction of various underground pipelines in cities. The pipe jacking construction usually adopts an open caisson as a working well, and when the open caisson is constructed, a hole is reserved on a well wall and is used as a pipeline through hole for pipe jacking construction. The open caisson is reserved the entrance to a cave and adopts the pre-buried steel sleeve to form more, for making the pipeline pass through smoothly during the construction of later stage push pipe, the diameter of open caisson reserved the entrance to a cave always slightly is greater than the push pipe diameter, consequently has certain clearance between reservation hole inner wall and the push pipe, in order to prevent groundwater, mud, mortar etc. from flowing backwards to the well in the push pipe work progress, open caisson entrance to a cave stagnant water becomes an important subject, also most interesting in open caisson construction.

In the prior art, a large number of technical schemes related to open caisson hole water stop are disclosed, such as an open caisson reserved hole water stop device disclosed in CN114753869A and a use method, an open caisson reserved hole plugging waterproof structure disclosed in CN211395721U, an open caisson reserved hole plugging tool disclosed in CN214616560U, an open caisson reserved hole plugging structure disclosed in CN209293051U and the like, and the technologies can effectively solve the water stop problem of the gap between the inner wall of the reserved hole and the jacking pipe.

However, the prior art generally ignores the problem of water seepage between the pre-buried steel pipe at the opening and the concrete on the well wall. Although the embedded steel pipe and the well wall concrete are integrally poured, due to the fact that concrete vibration is not compact during construction, vibration of the embedded pipe during pipe jacking construction and the like, tiny gaps exist between the embedded pipe and the concrete, in the pipe jacking construction process, underground water outside a well possibly penetrates into the well through the gaps to affect normal construction, and in the later pipeline operation process, sewage in an open caisson possibly penetrates out of the well along the gaps to pollute the underground water or soak surrounding soil for a long time to cause ground collapse.

Disclosure of Invention

The utility model aims to solve the problems and provides a reserved hole water seepage prevention structure of an open caisson, which is used for preventing water seepage between a hole embedded pipe and open caisson concrete.

The technical scheme of the utility model is as follows:

the utility model provides a water seepage structure is prevented to open caisson reservation entrance to a cave, the pore wall of open caisson reservation entrance to a cave is formed by the pre-buried steel pipe as an organic whole with open caisson wall of a well concrete placement, its characterized in that: an annular water-stopping steel plate is sleeved on the embedded steel pipe, the inner annular edge of the annular water-stopping steel plate is tightly welded with the pipe wall of the embedded steel pipe, and the annular water-stopping steel plate is poured into the wall concrete of the open caisson.

The utility model has simple structure, increases an annular water stop steel plate on the embedded steel pipe of the open caisson opening, increases the base area of the embedded steel pipe and the open caisson concrete, and can effectively prevent the water seepage problem of the open caisson opening. The design inspiration of the utility model comes from the water stopping technology of the construction joint of the underground structure, when the underground structure is constructed by adopting the sectional pouring, a joint is formed between the two pouring concretes, and in order to prevent water seepage at the joint, a water stopping steel plate is usually arranged between the two pouring concretes. The utility model applies the water-stop steel plate technology to the open caisson opening, and also has good water seepage prevention effect.

Drawings

FIG. 1 is a schematic elevational view of the present utility model;

FIG. 2 is a schematic plan view of the present utility model;

fig. 3 is a schematic structural view of a water-stop steel plate welded on an open caisson hole embedded steel pipe.

Detailed Description

As shown in fig. 1 and 2, a reserved hole 4 is arranged on the well wall 3 of the open caisson, the wall of the reserved hole of the open caisson is formed by an embedded steel pipe 1 which is cast with the concrete of the well wall of the open caisson into a whole, an annular water-stop steel plate 2 is sleeved on the embedded steel pipe 1, the inner annular edge of the annular water-stop steel plate 2 is tightly welded with the wall of the embedded steel pipe 1, and the annular water-stop steel plate 2 is cast in the concrete of the well wall 3 of the open caisson.

As shown in fig. 3, the pre-buried steel pipe 1 and the annular water stop steel plate 2 are welded in advance to be integrated. In order to improve the water stopping effect of the annular water stopping steel plate, the outer annular edge of the annular water stopping steel plate can be bent to one side by a certain angle.

And during open caisson construction, installing an embedded steel pipe at the position of a reserved hole of the open caisson, and firmly welding the embedded steel pipe and the open caisson steel reinforcement framework, and pouring the embedded steel pipe, the annular water stop steel plate and the well wall concrete into a whole. When the underground water level of the open caisson construction area is higher, the bending direction of the annular water stop steel plate faces out of the well, so that the underground water is mainly prevented from penetrating into the well during construction; when the groundwater level is lower, the bending direction of the water stop steel plate faces to the inside of the well, and the sewage in the later open caisson is mainly prevented from penetrating to the outside of the well.

Claims

1. The utility model provides a water seepage structure is prevented to open caisson reservation entrance to a cave, the pore wall of open caisson reservation entrance to a cave is formed by the pre-buried steel pipe as an organic whole with open caisson wall of a well concrete placement, its characterized in that: an annular water-stopping steel plate is sleeved on the embedded steel pipe, the inner annular edge of the annular water-stopping steel plate is tightly welded with the pipe wall of the embedded steel pipe, and the annular water-stopping steel plate is poured into the wall concrete of the open caisson.