CN203238671U - Self-healing construction seam structure of underground building side wall - Google Patents

Abstract

The utility model relates to a self-healing construction joint structure of the side wall of an underground building, which is characterized in that a secondary side wall (2) is synchronously arranged at the construction joint (3) of the side wall main body (1), The gap (4) is formed at the junction of (1) and the secondary side wall (2), and the upper opening (8) of the gap (4) is closed with concrete after filling the gap (4) with bentonite (6). (2), the void (4) and the bentonite (6) in the void (4) form a self-healing construction joint structure. In the utility model, a secondary side wall is poured synchronously at the construction joint position of the main body of the side wall. A cavity runs through the secondary side wall longitudinally, and the cavity is filled with bentonite. Therefore, when groundwater infiltrates from the construction joint When it encounters bentonite, the volume of bentonite will expand when it encounters water, and after expansion, the bentonite will enter the construction joint in the form of gel, thereby blocking the water seepage channel, forming an automatic blocking structure, and achieving the purpose of self-healing. The utility model has the beneficial effects of simple structure, convenient construction and effective avoidance of underground building leakage.

Description

A self-healing construction joint structure for the side wall of an underground building

technical field

The utility model relates to an underground building construction joint structure, in particular to a self-healing construction joint structure for the side wall of an underground building. It belongs to the technical field of building structures. the

Background technique

According to statistics, the leakage rate of my country's construction projects is as high as more than 80%, which has remained high for many years, especially the leakage of the side walls of underground buildings is hard to prevent. The main causes of side wall leakage of underground buildings are: (1) vertical through cracks caused by side wall shrinkage; (2) concrete pouring and tamping is not dense enough; (3) improper treatment of various construction joints. In the prior art, only a flexible waterproof layer and a rigid waterproof layer are used for underground building waterproofing, wherein the rigid waterproof layer includes a basement floor, an additional side wall and an additional roof. the

At present, there are many waterproof measures adopted for the construction joints of the side walls of underground buildings, including external waterstops, external waterproof coatings, mid-buried water-stop steel plates, mid-buried expanded water-stop rubber, etc. However, the above-mentioned measures are all passive water-stop measures, which belong to rigid waterproof structures. Under the relatively extensive construction conditions in our country, these rigid waterproof structures are prone to cracking and leakage at the joints after a period of time. Therefore, the existing above-mentioned several The construction joint waterproof structure of the side wall of the underground building in this way cannot solve the problem of leakage. It is necessary to study a new structure that can radically cure the leakage of the construction joint of the side wall of the underground building. the

Utility model content

The purpose of this utility model is to provide a self-healing construction for the side wall of an underground building that has a simple structure and can effectively avoid the leakage of the underground building in order to solve the problem of easy cracking and leakage at the joints of the hard waterproof structure in the prior art seam structure. the

The purpose of this utility model can be achieved through the following technical solutions:

A self-healing construction joint structure for the side wall of an underground building. Its structural characteristics are: a secondary side wall is synchronously arranged at the construction joint of the main body of the side wall, a gap is formed at the connection between the main body of the side wall and the secondary side wall, and a gap is formed in the gap. After the middle is filled with bentonite, the upper opening of the gap is closed with concrete, and the secondary side wall, the gap and the bentonite in the gap constitute a self-healing construction joint structure. the

The purpose of this utility model can also be achieved through the following technical solutions:

Further, the secondary side wall is semi-cylindrical, and a cylindrical cavity can be provided at the center of the secondary side wall. After filling the cylindrical cavity with bentonite, the upper opening of the gap is closed with concrete. The secondary side wall, The void, the cylindrical cavity and the bentonite in the void and the cylindrical cavity form a self-healing construction joint structure. the

Further, the gap is located at the junction of the secondary side wall and the main body of the side wall, and may be located on one side or two symmetrical sides of the cylindrical cavity. the

Further, the gap and the cylindrical cavity may be longitudinal structures, and a buried waterstop is provided in the gap. the

An embodiment of the utility model is: the construction joints and gaps can be "L" shaped. the

An embodiment of the utility model is that: the construction joint may be a post-cast rigid joint. the

The utility model has the following outstanding beneficial effects:

In the utility model, a secondary side wall is poured synchronously at the construction joint position of the main body of the side wall. A cavity runs through the secondary side wall longitudinally, and the cavity is filled with bentonite. Therefore, when groundwater infiltrates from the construction joint When it encounters bentonite, the volume of bentonite will expand when it encounters water, and after expansion, the bentonite will enter the construction joint in the form of gel, thereby blocking the water seepage channel, forming an automatic blocking structure, and achieving the purpose of self-healing. The utility model has the beneficial effects of simple structure, convenient construction and effective avoidance of underground building leakage. the

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a specific embodiment 1 of the utility model. the

Fig. 2 is a top view structural diagram of the specific embodiment 1 of the utility model. the

Fig. 3 is a three-dimensional structural schematic diagram of a specific embodiment 1 of the present invention. the

4a-4d are schematic diagrams of the construction process of Embodiment 1 of the present invention. the

Fig. 5 is a three-dimensional structural schematic diagram of a specific embodiment 2 of the present invention. the

6a-6e are schematic diagrams of the construction process of Embodiment 3 of the present utility model. the

Among them, 1-side wall main body, 2-secondary side wall, 3-construction joint, 4-void, 5-cylindrical cavity, 6-bentonite, 7-columnar inner mold, 8-upper opening. the

Detailed ways

Specific embodiment 1:

Figures 1-3 and Figures 4a-4d constitute a specific embodiment 1 of the present invention. the

Referring to Fig. 1-Fig. 3, in this embodiment, a secondary side wall 2 is synchronously arranged at the construction joint 3 of the side wall main body 1, a gap 4 is formed at the junction of the side wall main body 1 and the secondary side wall 2, and the gap 4 is filled. After filling the bentonite 6, the upper opening 8 of the gap 4 is closed with concrete, and the secondary side wall 2, the gap 4 and the bentonite 6 in the gap 4 form a self-healing construction joint structure. the

In this example:

The secondary side wall 2 is semi-cylindrical, and a cylindrical cavity 5 is provided at the center of the secondary side wall 2. After the cylindrical cavity 5 is filled with bentonite 6, the upper opening 8 of the gap 4 is closed with concrete. The side wall 2, the gap 4, the cylindrical cavity 5 and the bentonite 6 in the gap 4 and the cylindrical cavity 5 form a self-healing construction joint structure. The gap 4 is located at the junction of the secondary side wall 2 and the side wall main body 1, on one side of one of the gaps, and the construction joint 3 and the gap 4 are in an "L" shape. The gap 4 and the cylindrical cavity 5 may be longitudinal structures, and a buried water stop is provided in the gap 4 . the

Referring to Fig. 4a-Fig. 4d, the construction method of the present embodiment is as follows:

1) Pouring the measuring wall main body 1, marking the construction joint 3 of the measuring wall main body 1;

2) Simultaneously pour and pound a secondary side wall 2 at the construction joint 3 of the side wall main body 1, place a columnar inner mold coated with a release agent at the junction of the side wall main body 1 and the secondary side wall 2, and pour concrete; After reaching the predetermined strength, pull out the columnar inner mold coated with release agent from the upper part to form a cavity 4; the secondary side wall 2 that is poured synchronously at the construction joint 3 of the side wall main body 1 is semi-cylindrical, and the secondary side wall The center of the circle of 2 is provided with a cylindrical cavity, and a columnar inner mold 7 coated with a release agent is placed in the cylindrical cavity, and the concrete is poured; after the concrete reaches a predetermined strength, the externally coated release agent is pulled out from the upper part. The cylindrical inner mold 7 forms a cylindrical cavity 5. the

3) Pour bentonite 6 into the cavity 4 from the upper part and close the upper opening 8, and the secondary side wall 2, the gap 4 and the bentonite 6 in the gap 4 form a self-healing construction joint structure. the

Because bentonite has strong hygroscopicity and expansibility, it can absorb 8 to 15 times its own volume of water and expand its volume; it can be dispersed into gel and suspension in water medium, and this medium solution has a certain viscosity. , denaturation and lubricity; strong cation exchange capacity; certain adsorption capacity for various gases, liquids, and organic substances, and the maximum adsorption capacity can reach 5 times its own weight. the

Specific embodiment 2:

Fig. 5 constitutes the specific embodiment 2 of the present utility model. the

Referring to Fig. 5, the characteristics of this embodiment 2 are: the construction joint 3 is a post-cast rigid joint, the actual length of the joint exceeds the maximum distance between expansion joints, and the secondary side wall 2 is fixed on the side wall main body 1 The junction with the left and right ends of the construction joint 3. Construction process is with specific embodiment 1. the

Specific embodiment 3:

Figures 6a-6e constitute a specific embodiment 3 of the present invention. the

The characteristic of Embodiment 3 is: if the underground building is a multi-layer structure, it will be difficult to draw the mold after the construction of each layer is completed. Therefore, the method of layer-by-layer construction can be adopted to reduce the difficulty of drawing the mold. the

Referring to Fig. 6a-Fig. 6e, the underground building of this embodiment has a two-story structure. After the construction of the first floor is completed, the previously built-in columnar inner mold 7 is pulled out, poured into bentonite 6, and a steel plate is placed on the top of bentonite 6 as the bottom After the construction of the second layer is completed, the process of drawing the mold and pouring the bentonite is the same. the

The above is only a preferred specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any equivalent replacement or change of the technical solution and the concept of the utility model shall belong to the protection scope of the utility model. the

Claims (6)

1. A self-healing construction joint structure of an underground building side wall, characterized in that: a secondary side wall (2) is synchronously set at the construction joint (3) of the side wall main body (1), and a secondary side wall (2) is set at the side wall main body (1) ) and the secondary side wall (2) to form a gap (4), fill the gap (4) with bentonite (6) and then use concrete to close the upper opening (8) of the gap (4), and the secondary side wall (2 ), the void (4) and the bentonite (6) in the void (4) constitute a self-healing construction joint structure. the 2. The self-healing construction joint structure of a side wall of an underground building according to claim 1, characterized in that: the secondary side wall (3) is semi-cylindrical, and a circle is arranged at the center of the secondary side wall (2). The cylindrical cavity (5), the upper opening (8) of the gap (4) is closed with concrete after filling the cylindrical cavity (5) with bentonite (6), and the secondary side wall (2), the gap (4) ), the cylindrical cavity (5) and the gap (4), and the bentonite (6) in the cylindrical cavity (5) constitute a self-healing construction joint structure. the 3. The self-healing construction joint structure of the side wall of an underground building according to claim 2, characterized in that: the gap (4) is located at the junction of the secondary side wall (2) and the side wall main body (1) , located on one side or symmetrical sides of the cylindrical cavity (5). the 4. The self-healing construction joint structure of a side wall of an underground building according to claim 2 or 3, characterized in that: the gap (4) and the cylindrical cavity (5) are longitudinal structures, and in the gap (4) There is a buried waterstop. the 5. The self-healing construction joint structure of the side wall of an underground building according to any one of claims 1 to 3, characterized in that the construction joint (3) and the gap (4) are "L" shaped. the 6. The self-healing construction joint structure of the side wall of an underground building according to any one of claims 1 to 3, characterized in that the construction joint (3) is a post-cast rigid joint. the

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