阅读说明：本技术 一种沉箱衔接段三角区水下混凝土施工结构及施工方法 (Caisson connecting section triangular area underwater concrete construction structure and construction method ) 是由 朱义平 姜华平 李庆东 庄巍 于 2021-07-12 设计创作，主要内容包括：本发明公开了一种沉箱衔接段三角区水下混凝土施工结构及施工方法,包括基床,水下混凝土,沉箱和混凝土结构和若干预制混凝土块体；若干预制混凝土块体为直角梯形结构；若干预制混凝土块体直角点位于沉箱外脚趾内侧并依次垂直叠放在基床上形成一侧模板；混凝土结构与直角梯形结构的预制混凝土块体斜面进行贴合；预制混凝土块体与沉箱和混凝土结构相互配合形成整体封闭的三角空间；水下混凝土通过水下混凝土浇筑工艺浇筑在三角空间内。本方案通过将若干个预制混凝土块体叠放作为水下混凝土的侧模板,消除了原有钢模板可能出现的模板变形或移位,因此大大提高了水下混凝土的施工效率。(The invention discloses an underwater concrete construction structure and a construction method for a triangular area at a caisson connecting section, which comprises a foundation bed, underwater concrete, a caisson, a concrete structure and a plurality of precast concrete blocks; the precast concrete blocks are in right-angled trapezoid structures; the right-angle points of the precast concrete blocks are positioned on the inner side of the outer toe of the caisson and are vertically stacked on the foundation bed in sequence to form a side template; the concrete structure is attached to the inclined plane of the precast concrete block body with the right-angled trapezoid structure; the precast concrete block, the caisson and the concrete structure are mutually matched to form an integrally closed triangular space; and underwater concrete is poured in the triangular space through an underwater concrete pouring process. According to the scheme, the plurality of precast concrete blocks are stacked to serve as the side templates of the underwater concrete, so that template deformation or displacement possibly occurring in the original steel templates is eliminated, and the construction efficiency of the underwater concrete is greatly improved.)

1. An underwater concrete construction structure of a triangular area of a caisson connecting section comprises a foundation bed, underwater concrete, a caisson and a concrete structure; the concrete block is characterized by also comprising a plurality of precast concrete blocks; the precast concrete blocks are of right-angled trapezoid structures; the right-angle points of the precast concrete blocks are positioned on the inner side of the outer toe of the caisson and are vertically stacked on the foundation bed in sequence to form a side template; the concrete structure is attached to the inclined plane of the precast concrete block body with the right-angled trapezoid structure; the precast concrete block body, the caisson and the concrete structure are matched with each other to form an integrally closed triangular space; the underwater concrete is poured in the triangular space through an underwater concrete pouring process.

2. The underwater concrete construction structure of the triangular area of the caisson connecting section according to claim 1, wherein the precast concrete block is of a right trapezoid structure, and the lengths of the upper and lower sides of the right trapezoid are controlled according to the width of a triangular space formed by the precast concrete block, the caisson and the concrete structure in cooperation.

3. The underwater concrete construction structure of the triangular area of the caisson connecting section as claimed in claim 2, wherein an included angle formed by a connecting line of a right angle point and a diagonal point of the trapezoid of the precast concrete block and a hypotenuse of the trapezoid is less than 90 °.

4. The underwater concrete construction structure in the triangular area of the caisson connecting section according to claim 1, wherein after the plurality of precast concrete blocks are vertically stacked, the top elevation of the precast concrete blocks is the same as that of the caisson top.

5. The underwater concrete construction structure in the triangular area of the caisson connecting section is characterized in that the foundation bed is a riprap foundation bed structure, and the top elevation of the foundation bed is the same as that of the toe top of the lower foot of the caisson; the top surface of the foundation bed is of a flat structure.

6. A construction method of underwater concrete in a triangular area of a caisson connecting section is characterized by comprising the following steps:

(1) prefabricating a concrete block: the shape of the rectangular trapezoid is a cube, and the length and the height of the upper side and the lower side of the rectangular trapezoid are determined by calculation and design;

(2) and (3) foundation bed construction: the top elevation of the foundation bed is the same as the top of the lower toe of the caisson, and the top surface of the foundation bed is leveled;

(3) installing a concrete block: vertically stacking a plurality of concrete blocks on the top surface of the foundation bed, wherein the right-angle point of each concrete block is positioned on the inner side of the toe outside the caisson and forms a stable whole with the existing concrete structure, and the right-angle point, the side surface of the caisson and the existing concrete structure form a closed triangular space;

(4) pouring underwater concrete: and pouring underwater concrete in the formed closed triangular space according to an underwater concrete pouring process.

Technical Field

The invention relates to the technical field of engineering construction, in particular to a caisson connecting section triangular area underwater concrete construction structure and method.

Background

The traditional underwater concrete pouring side template adopts a steel template, and the template is fixed by using pull rods and the like, and because the height of the template is usually more than 10m, the template is easy to deform or shift during concrete pouring, so that the underwater concrete leakage phenomenon is caused: the formwork attachment process is complex, requires divers to fit and requires a large amount of auxiliary material. When the template is deformed or displaced, the underwater repair difficulty is high. The template fixing process brought by the above various adverse factors is complex, the used materials are more, and there is a place to be improved.

Therefore, how to improve the working efficiency of underwater concrete construction is a problem to be solved in the field.

Disclosure of Invention

Aiming at the technical problem of low construction efficiency of the existing underwater concrete, the invention aims to provide an underwater concrete construction structure of the triangular area of the caisson connecting section, and further provides an underwater concrete construction method of the triangular area of the caisson connecting section on the basis of the underwater concrete construction structure.

In order to achieve the purpose, the underwater concrete construction structure of the triangular area of the caisson connecting section comprises a foundation bed, underwater concrete, a caisson and a concrete structure; the concrete block structure also comprises a plurality of precast concrete blocks; the precast concrete blocks are of right-angled trapezoid structures; the right-angle points of the precast concrete blocks are positioned on the inner side of the outer toe of the caisson and are vertically stacked on the foundation bed in sequence to form a side template; the concrete structure is attached to the inclined plane of the precast concrete block body with the right-angled trapezoid structure; the precast concrete block body, the caisson and the concrete structure are matched with each other to form an integrally closed triangular space; the underwater concrete is poured in the triangular space through an underwater concrete pouring process.

Furthermore, the precast concrete block is of a right trapezoid structure, and the lengths of the upper side and the lower side of the right trapezoid structure are controlled according to the width of a triangular space formed by the precast concrete block, the caisson and the concrete structure in a mutually matched mode.

Furthermore, the included angle formed by the connecting line of the right angle point of the precast concrete block and the diagonal point of the trapezoid and the oblique side of the trapezoid is less than 90 degrees, and then the height of the right trapezoid of the precast concrete block can be controlled.

Furthermore, after the precast concrete blocks are vertically stacked, the top elevation of the precast concrete blocks is the same as that of the top of the caisson.

Furthermore, the foundation bed is of a riprap foundation bed structure, and the top elevation of the foundation bed is the same as that of the toe top of the lower foot of the caisson; the top surface of the foundation bed is of a flat structure.

In order to achieve the purpose, the invention provides a construction method of underwater concrete in a triangular area of a caisson connecting section, which comprises the following steps:

(1) prefabricating a concrete block: the shape of the rectangular trapezoid is a cube, and the length and the height of the upper side and the lower side of the rectangular trapezoid are determined by calculation and design;

(2) and (3) foundation bed construction: the top elevation of the foundation bed is the same as the top of the lower toe of the caisson, and the top surface of the foundation bed is leveled;

(3) installing a concrete block: vertically stacking a plurality of concrete blocks on the top surface of the foundation bed, wherein the right-angle point of each concrete block is positioned on the inner side of the toe outside the caisson and forms a stable whole with the existing concrete structure, and the right-angle point, the side surface of the caisson and the existing concrete structure form a closed triangular space;

(4) pouring underwater concrete: and pouring underwater concrete in the formed closed triangular space according to an underwater concrete pouring process.

According to the underwater concrete construction structure and the construction method for the triangular area of the caisson connecting section, provided by the invention, the plurality of precast concrete blocks are stacked to be used as the side templates of the underwater concrete, so that the template deformation or displacement possibly occurring in the original steel template is eliminated, and the construction efficiency of the underwater concrete is greatly improved.

Drawings

The invention is further described below in conjunction with the appended drawings and the detailed description.

FIG. 1 is a schematic structural view of a concrete block in an underwater concrete construction structure in a triangular area of a caisson connecting section;

FIG. 2 is a schematic side elevation view of an underwater concrete construction structure in a triangular area of a connecting section of the caisson;

FIG. 3 is a schematic vertical view of an underwater concrete construction structure in a triangular area of a connecting section of the caisson;

fig. 4 is a schematic plan view of an underwater concrete construction structure of a triangular area of a connecting section of the caisson.

The following are part numbers in the drawings:

100. concrete block 200, foundation bed 300, underwater concrete 400, caisson 410, caisson external toe 500, original concrete structure

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Aiming at the technical problem that the existing underwater concrete pouring vertical formwork is usually more than 10 meters, and the formwork is easy to deform or shift during concrete pouring to cause the phenomenon of slurry leakage of underwater concrete, the scheme provides a caisson joining section triangle area underwater concrete construction method.

The underwater concrete construction structure of the triangular area of the caisson joining section provided by the scheme is shown in fig. 2-4, and comprises a plurality of precast concrete blocks 100, a foundation bed 200, underwater concrete 300, a caisson 400 and an original concrete structure 500 when being applied.

Wherein, precast concrete block 100 is precast concrete block, see fig. 1, and its structure is right trapezoid cube, because the concrete block is installed for prefabricating the back with lifting equipment, therefore its top sets up a plurality of hoisting points, and conventional hoisting point is generally 4.

An included angle 110 formed by a connecting line of a right angle point and a trapezoid diagonal point of the precast concrete block 100 and a trapezoid oblique side is smaller than 90 degrees, the precast concrete block 100 can be controlled not to rotate outwards, the minimum height of the right trapezoid needs to be determined, and the control is performed by using an angle smaller than 90 degrees.

The minimum value of the height of the right trapezoid in the plane of the concrete block 100 means the calculated value, and the actually used value should be larger than this value in order to prevent the precast concrete block 100 from rotating and sliding outwards.

The foundation bed 200 is a riprap foundation bed, the top surface of which needs to be leveled by divers' manual work or leveling equipment. The foundation bed 200 is a supporting body for placing a plurality of precast concrete blocks 100.

Since the bottom of the caisson 400 has a protruding lower toe 410, if the foundation bed 200 is not lifted, the lowest precast concrete block 100 needs to be made into a special-shaped block to block the channel through which the cast-in-place underwater concrete flows outwards; the top level of the foundation bed 200 is the same as the height of the outer toe top 410 of the caisson 400.

Referring to fig. 2 to 3, a plurality of precast concrete blocks 100 are vertically stacked on the top surface of the foundation bed 200, and are stably connected by their own weight, and the right-angle point of the precast concrete block 100 is located at the inner side of the outer toe of the caisson 400, and the top elevation of the plurality of precast concrete blocks 100 after installation is the same as the top elevation of the caisson 400.

Referring to fig. 4, a plurality of precast concrete blocks 100 are vertically stacked on a foundation 200, which may be a side form, and lean against the outer toe of a caisson 400. The existing concrete structure 500 is attached to the inclined plane of the precast right trapezoid concrete block 100, therefore, the right-angle plane of the precast concrete block 100 is attached to the side surface of the caisson 400, the inclined plane is attached to the existing concrete structure 500, the inclined plane and the existing concrete structure 500 are mutually matched to form a stable whole body, a closed triangular space is formed, and the underwater concrete 300 is poured in the triangular space according to an underwater concrete pouring process.

Secondly, in the scheme, the precast concrete block 100 is of a right-angled trapezoid structure; in practical application, the structure of the prefabricated concrete block is not limited, and the right-angled trapezoid structure is preferably adopted in the scheme, wherein the outer edge line of the prefabricated concrete block 100 is mainly parallel to the outer edge line of the caisson 400, and the prefabricated concrete block is only attractive.

In addition, the lengths of the upper and lower sides of the right trapezoid are determined according to the width of a triangular space cast by the underwater concrete 300 through the underwater concrete casting process.

The minimum height is determined by the angle 110 formed by the connecting line of the right angle point and the diagonal point of the trapezoid of the prefabricated concrete block 100 and the oblique side of the trapezoid being smaller than 90 degrees.

Because the right-angle point of the precast concrete block 100 is positioned on the inner side of the outer toe 410 of the caisson 400 and limited by the outer toe 410 of the caisson, the right-angle point of the precast concrete block 100 cannot move outwards when underwater concrete is poured in a triangular space. At the point of the outer side of the precast concrete block 100 contacting with the original concrete structure 500, because the original concrete structure 500 lacks the restriction similar to the caisson outer toe 410, when the underwater concrete is poured in the triangular space, the precast concrete block 100 can move outwards, namely the precast concrete block 100 can also rotate outwards along the right-angle point; therefore, in order to control the precast concrete block 100 not to be rotated outward, the present example determines the minimum height of the right trapezoid by making an angle 110 formed by a line connecting the right angle point of the precast concrete block 100 and the diagonal point of the trapezoid and the oblique side of the trapezoid smaller than 90 °.

Based on the underwater concrete construction structure, the underwater concrete construction method for the triangular area of the caisson connecting section is provided as follows, and comprises the following steps:

(1) precast concrete block 100: the shape of the rectangular trapezoid is a cube, and the length and the height of the upper side and the lower side of the rectangular trapezoid are determined by calculation and design;

(2) constructing the foundation bed 200: the top elevation of the foundation bed 200 is the same as the top of the lower toe of the caisson 400, and the top surface of the foundation bed 200 is leveled manually;

(3) installation of the concrete block 100: vertically stacking a plurality of concrete blocks 100 on the top surface of the foundation bed 200, wherein the right-angle point of the concrete block 100 is positioned at the inner side of the toe 410 outside the caisson 400 and forms a stable whole with the existing concrete structure 500, and forms a closed triangular space with the side surface of the caisson 400 and the existing concrete structure 500;

(4) pouring the underwater concrete 300: and pouring underwater concrete 300 in the formed closed triangular space according to the underwater concrete.

The caisson connecting section triangular area underwater concrete construction structure and the caisson connecting section triangular area underwater concrete construction method formed by the scheme utilize the stacking of precast concrete blocks as side templates of underwater concrete, and solve the technical problem of complex template process in the prior art; the deformation or displacement of the steel template which may occur is eliminated, and the construction quality of the underwater concrete is improved;

secondly, the concrete block can be used as a part of underwater concrete, so that the cost is well saved;

in addition, the underwater concrete implementation method is simple in process and convenient to use, and greatly improves the working efficiency.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.