Construction method of post-cast strip with independent supporting system

Abstract

The invention discloses a construction method of a post-cast strip with an independent supporting system, which comprises the following steps of: integrally erecting a supporting frame, correspondingly adjusting a gap of the supporting frame in a post-cast strip area, and correspondingly installing the independent supporting system with adjustable supporting height; the formwork in the post-cast strip construction area can be independently removed, meanwhile, the overall supporting frame structure is not affected, the problem that the cleaning difficulty of the concrete connecting position of the post-cast strip is large is effectively solved, cleaning of the post-cast strip is facilitated, the construction quality of the post-cast strip is effectively improved, and the leakage problem caused by the pouring quality of the post-cast strip is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction and relates to a construction method of a post-cast strip with an independent supporting system. Background Art

[0002] Post-cast strips are concrete strips with a certain width reserved in beams, slabs (including foundation slabs), walls and other structures during construction, especially in cast-in-place integral reinforced concrete structures. These strips are poured after a certain period of time in order to adapt to factors such as environmental temperature changes, concrete shrinkage, and uneven structural settlement. Due to the difference in pouring time with the main building, when constructing existing post-cast strips, a separate support structure is often set up in the construction area of ​​the post-cast strips to facilitate subsequent construction without affecting the progress of the main construction.

[0003] The existing post-casting belt independent support technologies all set up independent supports, and the formwork in the post-casting belt support system cannot be removed, or structural support systems such as lattice columns and structural columns are used to support the temporary support so that it can be removed and re-supported independently. The existing independent support technology is cumbersome to construct, requires sufficient planning in the early stage, is difficult to construct, and has high costs.

[0004] In order to solve the above problems, a construction method for the post-cast strip is needed, which can make the post-cast strip template detachable without affecting the support, facilitate the cleaning of the post-cast strip, ensure its pouring quality, and avoid the risk of leakage of the basement roof in the later stage. Summary of the invention

[0005] In view of this, the present invention provides a construction method of a post-casting belt with an independent support system. The support system of the post-casting belt construction area is set up together with other non-post-casting belt areas, and the support bracket with adjustable support height in the independent support system is used to ensure that the formwork structure of the post-casting belt construction area is independent and removable, thereby solving the difficulty of cleaning the joint position of the post-casting belt concrete and improving the construction quality of the post-casting belt. The leakage problem caused by the casting quality of the post-casting belt is solved.

[0006] The invention discloses a construction method of a post-cast strip with an independent support system, which specifically comprises the following steps:

[0007] S1. Frame erection: measurement and layout are carried out according to the construction drawings to determine the spacing of the support frames corresponding to the post-casting belt construction area, and the disc-type formwork support frame is erected according to the measurement and layout results;

[0008] S2. An independent support system is provided in the region of the support frame corresponding to the post-casting zone; the independent support system comprises a joist and a support bracket, the joist is mounted on the support frame, the support bracket can be adjusted to move in the vertical direction to adjust the support height of the support bracket;

[0009] S3. Laying the formwork, laying the casting formwork in the non-post-casting zone area and the post-casting zone bottom formwork respectively, laying the casting formwork in the non-post-casting zone area on the top of the support frame in the non-post-casting zone area, laying the post-casting zone bottom formwork on the top of the support bracket, the casting formwork in the non-post-casting zone area includes the non-post-casting zone bottom formwork and the non-post-casting zone side formwork, adjusting the support height of the support bracket until the height of the post-casting zone bottom formwork is flush with the non-post-casting zone bottom formwork;

[0010] S4. Post-casting belt interception: set interception devices at both ends of the post-casting belt construction area;

[0011] S5. Pour concrete into the non-post-casting belt area. After the concrete in the non-post-casting belt area solidifies, remove the interception device, lower the support height of the support bracket so that the post-casting belt bottom mold leaves the post-casting belt construction area, and then clean the post-casting belt construction area;

[0012] S6. After the post-casting belt construction area is cleaned, the support height of the support bracket is raised to re-support the post-casting belt bottom mold to the bottom surface of the post-casting belt construction area, and a closing component is set in the post-casting belt construction area to close the post-casting belt construction area;

[0013] S7. Remove the support frames corresponding to the non-post-casting zone areas, and pour concrete in the post-casting zone construction area after the pouring conditions are met.

[0014] Further, in step S2, the support beam includes two symmetrically arranged beam parts, the support bracket is clamped and fixed by the two beam parts, and the support bracket can be adjusted to move in a single degree of freedom in the vertical direction.

[0015] Further, in step S2, the independent support system also includes a formwork support beam, and the formwork support beam is arranged at a position between the bottom formwork of the post-cast strip and the support bracket, and the support bracket supports the bottom formwork of the post-cast strip through the formwork support beam.

[0016] Furthermore, in step S1, the spacing between the support frames corresponding to the post-casting zone construction area is 1200mm-1500mm; in step S3, at least two support brackets are provided along the length direction of the support beam.

[0017] Furthermore, in step S3, the non-post-cast strip side formwork is extended to the post-cast strip construction area along the width direction.

[0018] Further, in step S4, the interception device is a fish scale net or an air bag.

[0019] Further, in step S6, the closing assembly includes a sealing cover plate and a post-cast strip side mold, the post-cast strip side mold is installed on the top surface of the post-cast strip bottom mold, the sealing cover plate is covered on the top surface of the post-cast strip side mold, and the post-cast strip bottom mold, the sealing cover plate and the post-cast strip side mold enclose and close the post-cast strip construction area.

[0020] Beneficial effects of the present invention:

[0021] The present invention discloses a construction method of a post-casting strip with an independent support system. The support frame of the post-casting strip construction area is set up together with other non-post-casting strip areas to form a detachable whole. At the same time, the support bracket with adjustable support height in the independent support system is used to ensure that the formwork structure of the post-casting strip construction area is independent. Through the construction method of the present invention, the formwork of the post-casting strip construction area can be removed separately without affecting the overall support effect, effectively solving the problem of difficulty in cleaning the joint position of the post-casting strip concrete, facilitating the cleaning of the post-casting strip, effectively improving the construction quality of the post-casting strip, and solving the leakage problem caused by the casting quality of the post-casting strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the principle of cleaning the post-casting belt construction area according to an embodiment of the present invention;

[0023] Figure 2 It is a structural schematic diagram of a closed state of a post-cast belt construction area according to an embodiment of the present invention;

[0024] Figure 3 It is a schematic diagram of the principle of the post-cast strip after pouring of an embodiment of the present invention;

[0025] Figure 4 for Figure 3 A partial enlarged view of the AA point in the middle. DETAILED DESCRIPTION

[0026] It should be noted that, in the description of this specification, the terms "upper", "lower", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the present embodiment, in order to facilitate the understanding and further elaboration of the technical scheme, the entire construction area is artificially divided into a post-casting strip construction area and a non-post-casting strip construction area, wherein the area where the corresponding construction of the post-casting strip is carried out is the post-casting strip construction area, and the corresponding construction of the post-casting strip includes but is not limited to the erection of the supporting structure, the cleaning and protection of the pouring area, etc. In the present embodiment, the actual width of the post-casting strip construction area is greater than the width of the post-casting strip body, and the post-casting strip bottom mold is the same width as the post-casting strip construction area, and the edge of the post-casting strip bottom mold is interconnected with the adjacent non-post-casting strip bottom mold. The size of the post-casting strip in this embodiment is 800mm. In this embodiment, Figure 3 7 is the non-post-cast zone concrete, and 8 is the post-cast zone concrete (that is, the post-cast zone body), which can be understood by those skilled in the art and will not be described in detail here.

[0027] As shown in the figure, an embodiment of the present invention discloses a construction method of a post-cast strip with an independent support system, and the method specifically comprises the following steps:

[0028] S1. Frame erection, measurement and layout are carried out according to the construction drawings to determine the spacing of the support frames 5 corresponding to the post-casting strip construction area, and the disc-type formwork support frames 5 are erected according to the measurement and layout results; the spacing of the support frames 5 corresponding to the post-casting strip construction area is 1200mm-1500mm; in the conventional construction process, the size of the post-casting strip is limited, so the spacing of the support frames 5 in the post-casting strip construction area is limited to facilitate the subsequent setting of an independent support system, and because the length of the pipe sections of the support frames 5 erected on the construction site is mostly 1200mm or 1500mm, the spacing is preferably 1200mm or 1500mm. In this embodiment, a spacing of 1500mm is selected, and the width of the post-casting strip construction area of ​​this embodiment is also 1500mm, and the actual width of the post-casting strip is designed to be 800mm.

[0029] S2. An independent support system is set in the area of ​​the support frame 5 corresponding to the post-casting strip; the independent support system includes a support beam 1 and a support bracket, the support beam 1 is installed on the support frame 5, and the support bracket can be adjusted to move in the vertical direction to adjust the support height of the support bracket; the support beam 1 in this embodiment includes two symmetrically arranged beam splits 101, the beam splits 101 are made of channel steel, and the two channel steels are arranged back to back, as shown in the figure, the support bracket 2 is clamped and fixed by the two beam splits 101, and by changing the clamping force of the two channel steels, the support bracket 2 can be adjusted to move in a single degree of freedom in the vertical direction, which also changes the support height of the support bracket 2 (the support height refers to the lifting height of the support bracket 2, which corresponds to the height of the bottom mold 4 of the post-casting strip in this embodiment). Two support brackets 2 are arranged along the length direction of the support beam 1. The spacing between the support brackets 2 should be greater than the width of the post-casting strip, but not greater than the width of the post-casting strip bottom formwork 4. Therefore, the spacing between the two support brackets 2 in this embodiment is 900 mm or 1200 mm. The independent support system also includes a formwork support beam 3, which is arranged between the post-casting strip bottom formwork 4 and the support bracket 2. The support bracket 2 supports the post-casting strip bottom formwork 4 through the formwork support beam 3. In order to increase the support area and improve the support strength, a formwork support beam 3 is designed in this embodiment to establish effective support.

[0030] S3. Laying the formwork, laying the casting formwork for the non-post-casting strip area and the post-casting strip bottom formwork 4 respectively, laying the casting formwork for the non-post-casting strip area on the top of the support frame 5 of the non-post-casting strip area, laying the post-casting strip bottom formwork 4 on the top of the supporting bracket, the casting formwork for the non-post-casting strip area includes the non-post-casting strip bottom formwork 4 and the non-post-casting strip side formwork, adjusting the supporting height of the supporting bracket until the height of the post-casting strip bottom formwork 4 is flush with the non-post-casting strip bottom formwork 4; the non-post-casting strip side formwork extends to the post-casting strip construction area along the width direction. When laying the formwork, it is mainly divided into two parts. One is the post-casting belt construction area. At this time, only the post-casting belt bottom formwork 4 is set. The width of the post-casting belt bottom formwork 4 is the same as the width of the post-casting belt construction area, which is larger than the actual width of the post-casting belt. After the support is completed, the edge of the post-casting belt bottom formwork 4 is connected with the adjacent non-post-casting belt bottom formwork 4. When the non-post-casting belt side formwork is supported, the non-post-casting belt side formworks on both sides of the post-casting belt are extended into the post-casting belt construction area until the distance between the ends of the non-post-casting belt side formworks on both sides is 800mm (i.e., the width of the post-casting belt). Then, step S4 is carried out based on the post-casting belt bottom membrane and the non-post-casting belt side formwork.

[0031] S4. Post-casting strip interception, an interception device is set in the post-casting strip construction area; the interception device in this embodiment is a fish scale net or an air bag. Different interception devices are used when constructing post-casting strips of different structures. Conventional post-casting strips use waterproof fish scale nets, while post-casting strip beam structures use air bags for interception to prevent concrete from entering the post-casting strip construction area during pouring in the non-post-casting strip construction area, so as to reduce the difficulty of later cleaning. The interception device is set at the joint of the post-casting strip and the non-post-casting strip, that is, at the end of the non-post-casting strip side form.

[0032] S5. Pour concrete into the non-post-casting zone. After the concrete in the non-post-casting zone solidifies, remove the interception device, lower the support height of the support bracket so that the post-casting bottom mold 4 leaves the post-casting zone, and then clean up the post-casting zone;

[0033] S6. After the post-casting strip construction area is cleaned, the support bracket support height is raised to the height before adjustment in step S5, so as to re-support the post-casting strip bottom mold 4 to the bottom surface of the post-casting strip construction area, and set a closing component in the post-casting strip construction area to close the post-casting strip construction area; the closing component of this embodiment includes a sealing cover plate 6 and a post-casting strip side mold, the post-casting strip side mold is installed on the top surface of the post-casting strip bottom mold 4, the sealing cover plate 6 is covered on the top surface of the post-casting strip side mold, and the post-casting strip bottom mold 4, the sealing cover plate 6 and the post-casting strip side mold enclose the post-casting strip construction area. When supporting the post-casting strip side mold, the post-casting strip side mold should preferably extend horizontally to the non-post-casting strip area to ensure the sealing effect of the side mold after the post-casting strip construction area is cleaned and before pouring, and at the same time ensure the pouring quality of the post-casting strip when pouring. The sealing cover plate 6 is a wooden template, and a plurality of wooden squares are installed on its bottom surface.

[0034] S7. Remove the support frame 5 corresponding to the non-post-casting zone area, and pour concrete in the post-casting zone construction area after the pouring conditions are met. Remove the sealing cover plate 6 before pouring the post-casting zone, and check whether the post-casting zone construction area is clean. After the post-casting zone is poured, remove the post-casting zone side formwork, post-casting zone bottom formwork 4, and the support frame 5 corresponding to the post-casting zone construction area.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A construction method for a post-cast strip with an independent support system, characterized in that: The method specifically comprises the following steps: S1. Frame erection: measurement and layout are carried out according to the construction drawings to determine the spacing of the support frames corresponding to the post-casting belt construction area, and the disc-type formwork support frame is erected according to the measurement and layout results; S2. An independent support system is provided in the region of the support frame corresponding to the post-casting zone; the independent support system comprises a joist and a support bracket, the joist is mounted on the support frame, the support bracket can be adjusted to move in the vertical direction to adjust the support height of the support bracket; S3. Laying the formwork, laying the casting formwork in the non-post-casting zone area and the post-casting zone bottom formwork respectively, laying the casting formwork in the non-post-casting zone area on the top of the support frame in the non-post-casting zone area, laying the post-casting zone bottom formwork on the top of the support bracket, the casting formwork in the non-post-casting zone area includes the non-post-casting zone bottom formwork and the non-post-casting zone side formwork, adjusting the support height of the support bracket until the height of the post-casting zone bottom formwork is flush with the non-post-casting zone bottom formwork; S4. Post-casting belt interception: set up interception devices in the post-casting belt construction area; S5. Pour concrete into the non-post-casting belt area. After the concrete in the non-post-casting belt area solidifies, remove the interception device, lower the support height of the support bracket so that the post-casting belt bottom mold leaves the post-casting belt construction area, and then clean the post-casting belt construction area; S6. After the post-casting belt construction area is cleaned, the support height of the support bracket is raised to re-support the post-casting belt bottom mold to the bottom surface of the post-casting belt construction area, and a closing component is set in the post-casting belt construction area to close the post-casting belt construction area; S7. Remove the support frames corresponding to the non-post-casting zone areas, and pour concrete in the post-casting zone construction area after the pouring conditions are met.

2. The construction method of the post-cast strip with an independent support system according to claim 1, characterized in that: In step S2, the support beam comprises two symmetrically arranged beam parts, the support bracket is clamped and fixed by the two beam parts, and the support bracket can be adjusted to move in a single degree of freedom in the vertical direction.

3. The construction method of the post-cast strip with an independent support system according to claim 1, characterized in that: In step S2, the independent support system also includes a formwork support beam, which is arranged at a position between the bottom formwork of the post-cast strip and the support bracket, and the support bracket supports the bottom formwork of the post-cast strip through the formwork support beam.

4. The construction method of the post-cast strip with an independent support system according to claim 1, characterized in that: In step S1, the spacing between the support frames corresponding to the post-cast strip construction area is 1200mm-1500mm; in step S3, at least two support brackets are provided along the length direction of the support beam.

5. The construction method of the post-cast strip with an independent support system according to claim 1, characterized in that: In the step S3, the non-post-cast strip side formwork is extended to the post-cast strip construction area along the width direction.

6. The construction method of the post-cast strip with an independent support system according to claim 1, characterized in that: In step S4, the interception device is a fish scale net or an air bag.

7. The construction method of the post-cast strip with an independent support system according to claim 1, characterized in that: In step S6, the closing assembly includes a sealing cover plate and a post-cast strip side mold, the post-cast strip side mold is installed on the top surface of the post-cast strip bottom mold, the sealing cover plate is covered on the top surface of the post-cast strip side mold, and the post-cast strip bottom mold, the sealing cover plate and the post-cast strip side mold enclose and close the post-cast strip construction area.

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