Construction method for ring beam at top of reinforced concrete silo

Abstract

The present invention relates to the technical field of building construction, and particularly to a construction method for the ring beam at the top of a reinforced concrete silo. After the slip form platform is slid empty from a predetermined distance below the haunch section of the ring beam at the top of the silo until the top of the slip form platform is flush with the top of the haunch section of the ring beam at the top of the silo, the slip form templates of the outer slip form platform are removed, and the templates for the top section of the silo wall and the templates for the haunch section of the ring beam at the top of the silo are installed. Then, suspension bars are tied between the support rods and the outer slip form platform; and after the concrete of the top section of the silo wall and the haunch section of the ring beam at the top of the silo is poured; the slip form templates of the inner slip form platform are removed, and suspension bars are tied between the support rods and the inner slip form platform; then the jacks and lifting frames in the silo slip form system are removed; and the construction process of the upper ring beam at the top of the silo is continued. Thus, by transforming the existing slip form platform, a new formwork system and operation platform can be formed, which is more convenient, more efficient than the prior art, and has high construction safety.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly to a construction method for a ring beam at the top of a reinforced concrete silo. Background Art

[0002] The silo wall of a reinforced concrete silo is mostly constructed by slip formwork. After the slip formwork is lifted to the top of the silo, the construction of the ring beam at the top of the silo needs to be carried out. Generally, the width of the ring beam at the top of the silo is larger than that of the silo wall, so it is designed as a haunched type to make the ring beam at the top of the silo smoothly connected with the silo wall. The height of the ring beam at the top of the silo is greater than that of the beam with the largest span at the top of the silo, and the height is generally greater than 2m. At present, generally, through-wall sleeves are reserved on the silo wall, and then an operation platform is erected. After that, the formwork for the haunched section at the top of the silo is supported at the top of the silo wall. In the case of high-altitude operation, the construction difficulty is quite large, and the construction operation risk is high, which is not expected by those skilled in the art. Summary of the Invention

[0003] In view of the above problems, the present invention discloses a construction method for a ring beam at the top of a reinforced concrete silo. A silo slip formwork system is provided on the silo wall of the concrete silo. The silo slip formwork system includes an outer slip formwork platform, an inner slip formwork platform, and a lifting device. The lifting device includes a lifting frame, a jack, and a support rod. The lifting frame is fixedly connected to both the outer slip formwork platform and the inner slip formwork platform. The base of the jack is arranged on the cross beam of the lifting frame, and the through-hole of the jack's core shaft is sleeved on the support rod. Among them, the method includes the following steps:

[0004] Step S1, after pouring the concrete of the silo wall to a predetermined distance below the haunched section of the ring beam at the top of the silo, stop pouring the concrete, and use the lifting device to lift the outer slip formwork platform and the inner slip formwork platform empty until the tops of the outer slip formwork platform and the inner slip formwork platform are flush with the top of the haunched section of the ring beam at the top of the silo;

[0005] Step S2, remove the slip formwork of the outer slip formwork platform, and install the formwork for the top section of the silo wall and the formwork for the haunched section of the ring beam at the top of the silo on the inner side of the outer slip formwork platform, and the formwork for the haunched section of the ring beam at the top of the silo is located above the formwork for the top section of the silo wall;

[0006] Step S3, tie a first suspension bar between the support rod and the bottom of the outer slip formwork platform;

[0007] Step S4, pour the concrete of the top section of the silo wall and the haunched section of the ring beam at the top of the silo;

[0008] Step S5, remove the slip formwork of the inner slip formwork platform, and tie a second suspension bar between the support rod and the bottom of the inner slip formwork platform;

[0009] Step S6, and after using steel pipes to tightly jack between the bottom of the outer slipform platform and the silo wall, and between the bottom of the inner slipform platform and the silo wall, remove the jacks and lifting frames in the silo slipform system;

[0010] Step S7, continue with the construction process of the upper silo top ring beam.

[0011] In the above construction method of the reinforced concrete silo top ring beam, the predetermined distance is 450 - 550 mm.

[0012] In the above construction method of the reinforced concrete silo top ring beam, in Step S1, use the lifting device to empty-slip the outer slipform platform and the inner slipform platform until the tops of the outer slipform platform and the inner slipform platform are flush with the top of the haunch section of the silo top ring beam, and then continue to tie the steel bars between the outer slipform platform and the inner slipform platform.

[0013] In the above construction method of the reinforced concrete silo top ring beam, the lifting frame is a cross-shaped frame.

[0014] In the above construction method of the reinforced concrete silo top ring beam, the silo slipform system further includes a suspended scaffold, which is fixedly arranged below the bottoms of the outer slipform platform and the inner slipform platform, and the suspended scaffold is removed in Step S6.

[0015] In the above construction method of the reinforced concrete silo top ring beam, both the first hanger bar and the second hanger bar are round steel bars.

[0016] In the above construction method of the reinforced concrete silo top ring beam, the slipform templates of both the outer slipform platform and the inner slipform platform are steel templates.

[0017] In the above construction method of the reinforced concrete silo top ring beam, the height of the silo top ring beam is greater than 2 m.

[0018] Compared with the prior art, the above invention has the following advantages or beneficial effects:

[0019] The present invention discloses a construction method of a reinforced concrete silo top ring beam, which directly uses the existing slipform platform for transformation to form a new formwork system and operation platform, is more convenient and efficient than the prior art, and has high construction safety. Description of the Drawings

[0020] The present invention, its features, shape and advantages will become more apparent by reading the following detailed description of non - restrictive embodiments with reference to the accompanying drawings. The same reference numerals indicate the same parts throughout all the drawings. The drawings are not necessarily drawn to scale, and the emphasis is on showing the gist of the present invention.

[0021] Figure 1 It is a flow chart of the construction method of the ring beam at the top of the reinforced concrete silo in the embodiment of the present invention;

[0022] Figures 2 to 8 It is a structural flow chart of the construction method of the ring beam at the top of the reinforced concrete silo in the embodiment of the present invention. Detailed implementation manners

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation of the present invention.

[0024] As Figure 1 shown, the present invention discloses a construction method of a ring beam at the top of a reinforced concrete silo. A silo slip form system is provided on the silo wall 1 of the concrete silo. The silo slip form system includes an outer slip form platform 2, an inner slip form platform 3 and a lifting device. The lifting device includes a lifting frame 5, a jack 6 and a support rod 7. The lifting frame 5 is fixedly connected to both the outer slip form platform 2 and the inner slip form platform 3. And a hanging scaffold 4 is fixedly arranged below the bottoms of the outer slip form platform 2 and the inner slip form platform 3. The base of the jack 6 is arranged on the cross beam of the lifting frame 5, and the through - hole of the jack 6 is sleeved on the support rod 7. Specifically, the method includes the following steps:

[0025] Step S1, after pouring the concrete of the silo wall to a position 450 - 550 mm below the haunch section of the ring beam at the top of the silo (that is, the distance between the upper surface of the poured concrete of the silo wall and the haunch section of the ring beam at the top of the silo is 450 - 550 mm), stop pouring the concrete. This is to ensure that the steel bars in the haunch section of the ring beam at the top of the silo have sufficient anchorage length, as Figure 2 shown in the structure; and use the lifting device to empty - slip the outer slip form platform 2 and the inner slip form platform 3 until the tops of the outer slip form platform 2 and the inner slip form platform 3 are flush with the top of the haunch section of the ring beam at the top of the silo, then stop the empty - slipping, and continue to bind steel bars between the slip form template 21 of the outer slip form platform 2 and the slip form template 22 of the inner slip form platform 3, so as to effectively utilize the steel formwork inside the slip form and avoid repeated formwork removal and formwork erection, as Figure 3 shown in the structure.

[0026] Step S2, remove the slip formwork 21 of the outer slip formwork platform 2, and install the top section formwork 8 of the silo wall and the haunch section formwork 9 of the silo top ring beam on the inner side of the outer slip formwork platform 2, and the haunch section formwork 9 of the silo top ring beam is located above the top section formwork 8 of the silo wall.

[0027] Step S3, tie the first suspension bar 10 between the support rod 7 and the bottom of the outer slip formwork platform 2. At this time, the weight of the outer slip formwork platform 2 is concentrated on the support rod 7, which makes 50% of the bedding for the removal of the jack 6, the lifting frame 5, and the suspended scaffold 4 in the above-mentioned outer formwork transformation, as Figure 4 shown in the structure.

[0028] Step S4, pour the concrete 11 for the top section of the silo wall and the haunch section of the silo top ring beam, as Figure 5 shown in the structure.

[0029] Step S5, remove the slip formwork 31 of the inner slip formwork platform 3, and tie the second suspension bar 12 between the support rod 7 and the bottom of the inner slip formwork platform 3. At this time, the weight of the inner slip formwork platform 3 is concentrated on the support rod 7; the above-mentioned inner formwork transformation also makes 50% of the bedding for the removal of the jack 6, the lifting frame 5, and the suspended scaffold 4, as Figure 6 shown in the structure.

[0030] Step S6, after using steel pipes (such as 48mm * 3mm steel pipes) to tightly jack between the bottom of the outer slip formwork platform 2 and the silo wall 1, and between the bottom of the inner slip formwork platform 3 and the silo wall 1 (using the steel pipe 13 to tightly jack between the bottom of the outer slip formwork platform 2 and the silo wall 1, and also using the steel pipe 14 to tightly jack between the bottom of the inner slip formwork platform 3 and the silo wall 1), remove the jack 6, the lifting frame 5, and the suspended scaffold 4 in the silo slip formwork system, as Figure 7 shown in the structure.

[0031] Step S7, utilize the existing transformed silo slip formwork system to continue to erect the scaffold 15 and carry out the construction process of the upper silo top ring beam to form the silo top ring beam 16 above the haunch section of the silo top ring beam, as Figure 8 shown in the structure.

[0032] In a preferred embodiment of the present invention, the above-mentioned lifting frame 5 is a split frame.

[0033] In a preferred embodiment of the present invention, the above-mentioned first suspension bar and the second suspension bar are both round steel, such as round steel.

[0034] In a preferred embodiment of the present invention, the slip formworks of the above-mentioned outer slip formwork platform 2 and the inner slip formwork platform 3 are both steel formworks.

[0035] In a preferred embodiment of the present invention, the height of the above-mentioned roof ring beam is greater than 2m.

[0036] Those skilled in the art should understand that those skilled in the art can achieve variant examples in combination with the prior art and the above embodiments, which will not be elaborated herein. Such variant examples do not affect the essence of the present invention and will not be elaborated herein.

[0037] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and the equipment and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present invention, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. Construction method of the ring beam at the top of a reinforced concrete silo. A silo slip form system is provided on the silo wall of the concrete silo. The silo slip form system includes an outer slip form platform, an inner slip form platform, and a lifting device. The lifting device includes a lifting frame, a jack, and a support rod. The lifting frame is fixedly connected to both the outer slip form platform and the inner slip form platform. The base of the jack is arranged on the cross beam of the lifting frame, and the through-hole of the jack is sleeved on the support rod. It is characterized in that the method includes the following steps: Step S1: After pouring the concrete of the silo wall to a predetermined distance below the haunch section of the ring beam at the top of the silo, stop pouring the concrete, and use the lifting device to slide the outer slip form platform and the inner slip form platform empty until the tops of the outer slip form platform and the inner slip form platform are flush with the top of the haunch section of the ring beam at the top of the silo. In step S1, after using the lifting device to slide the outer slip form platform and the inner slip form platform empty until the tops of the outer slip form platform and the inner slip form platform are flush with the top of the haunch section of the ring beam at the top of the silo, continue to tie the steel bars between the outer slip form platform and the inner slip form platform. Step S2: Remove the slip form template of the outer slip form platform, and install the template for the top section of the silo wall and the template for the haunch section of the ring beam at the top of the silo on the inner side of the outer slip form platform, and the template for the haunch section of the ring beam at the top of the silo is located above the template for the top section of the silo wall. Step S3: Tie a first suspension bar between the support rod and the bottom of the outer slip form platform. Step S4: Pour the concrete for the top section of the silo wall and the haunch section of the ring beam at the top of the silo. Step S5: Remove the slip form template of the inner slip form platform, and tie a second suspension bar between the support rod and the bottom of the inner slip form platform. Step S6: After using steel pipes to tightly support between the bottom of the outer slip form platform and the silo wall, and between the bottom of the inner slip form platform and the silo wall, remove the jack and the lifting frame in the silo slip form system. Step S7: Continue with the construction process of the upper ring beam at the top of the silo.

2. The construction method of the ring beam at the top of a reinforced concrete silo according to claim 1, it is characterized in that the predetermined distance is 450 - 550 mm.

3. The construction method of the ring beam at the top of a reinforced concrete silo according to claim 1, it is characterized in that the lifting frame is a cross-shaped frame.

4. The construction method of the ring beam at the top of a reinforced concrete silo according to claim 1, it is characterized in that the silo slip form system further includes a suspended scaffold, which is fixedly arranged below the bottoms of the outer slip form platform and the inner slip form platform, and the suspended scaffold is removed in step S6.

5. The construction method of the ring beam at the top of a reinforced concrete silo according to claim 1, it is characterized in that both the first suspension bar and the second suspension bar are round steel bars.

6. The construction method of the ring beam at the top of a reinforced concrete silo according to claim 1, it is characterized in that the slip form templates of both the outer slip form platform and the inner slip form platform are steel templates.

7. The construction method of the ring beam at the top of the reinforced concrete silo as described in claim 1, characterized in that, the height of the ring beam at the top of the silo is greater than 2m.

Images