CN213268892U - Post-cast strip connection structure is supported to casing string - Google Patents

Post-cast strip connection structure is supported to casing string Download PDF

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Publication number
CN213268892U
CN213268892U CN202021670704.7U CN202021670704U CN213268892U CN 213268892 U CN213268892 U CN 213268892U CN 202021670704 U CN202021670704 U CN 202021670704U CN 213268892 U CN213268892 U CN 213268892U
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CN
China
Prior art keywords
cast strip
post
casing
casing string
bottom plate
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Expired - Fee Related
Application number
CN202021670704.7U
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Chinese (zh)
Inventor
廖博帆
王梓年
张龙
李岩
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China Construction Second Engineering Bureau Co Ltd
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China Construction Second Engineering Bureau Co Ltd
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Priority to CN202021670704.7U priority Critical patent/CN213268892U/en
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Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a casing string supports post-cast strip connection structure, contain the basement roof, set up in the roof post-cast strip of basement roof, basement bottom plate, set up in the basement bottom plate and the vertical bottom plate post-cast strip that is located the same place with the roof post-cast strip, and connect the casing string between roof post-cast strip and bottom plate post-cast strip both sides; the casing string is a prefabricated string comprising casing, and steel reinforcement and concrete in the casing. The utility model, through the arrangement of the sleeve column, is convenient for prefabricating the support column on site, saves cost and improves the strength of the support concrete; through the arrangement of the connecting plates, adjacent casing strings can be connected, so that the integrity between the casing strings is improved, and the stress area can be enlarged; through interim braced system's setting, can share the atress of casing string, and the level props and can carry out horizontal spacing to the casing string and prevent its lateral displacement. In addition, horizontal brace and bracing are for can assembling the design and angularly adjustable, adaptation site conditions that can be very big.

Description

Post-cast strip connection structure is supported to casing string
Technical Field
The utility model belongs to the construction field, in particular to post-cast strip connection structure is supported to casing string.
Background
Post-cast strips are usually symmetrically arranged on a top plate and a bottom plate of a basement during construction, and a support frame body is required to support a formwork during post-cast strip construction. The traditional method is that a steel pipe frame body is reserved, but a long period of time exists between the concrete on two sides of a post-cast strip and the pouring of the post-cast strip, the frame body is long in retention time, high in cost investment, large in template supporting difficulty, easy to deform and corrode in the period of time, a template, a jacking, a square timber and the like, and the support is loosened due to rusting; and because the steel pipe diameter is restricted, need great laying area to put into more materials and occupy great space, be unfavorable for later stage fitment construction and electromechanical installation. Meanwhile, sundries are easy to accumulate in the steel pipe supporting structure and are not easy to clean.
If the common casing string formwork is adopted for supporting and back jacking, the casing string also needs to be supported, the manpower and the materials are consumed, the subsequent cutting is needed, and the overall stress on the structure is unfavorable. And the supporting strength of the concrete column is not easy to meet the requirement of upper load when the concrete column is only used for supporting, and the lateral limiting and supporting of the concrete column also need to be designed specifically.
SUMMERY OF THE UTILITY MODEL
The utility model provides a post-cast strip connection structure is supported to casing string for the convenient application of support column when solving the construction of post-cast strip of basement, effectively support and side direction technical problem such as spacing.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a connecting structure of a post-cast strip supported by a casing string comprises a basement top plate, a top plate post-cast strip arranged at the position of the basement top plate, a basement bottom plate, a bottom plate post-cast strip arranged on the basement bottom plate and vertically positioned at the same position as the top plate post-cast strip, and a casing string connected between the top plate post-cast strip and two sides of the bottom plate post-cast strip;
the casing string is a prefabricated string and comprises a casing, and steel bars and concrete in the casing.
Further, the sleeve is a cylindrical or square pipe and is made of a steel pipe or a plastic pipe; the reinforcing bar contains four support column muscle that are square distribution and connects in the support stirrup in the support column muscle outside at least.
Further, the casing string is connected to one side of the bottom plate post-cast strip and one side of the top plate post-cast strip, and the distance between the top of the casing string and the top of the casing string close to the top plate post-cast strip is not less than 200 mm; the distance between the bottom of the casing string and the post-cast strip close to the bottom plate is not less than 200 mm.
Further, the casing strings are arranged at intervals in the length direction of the top plate post-cast strip and the bottom plate post-cast strip and at least arranged below the frame secondary beam.
Furthermore, the connecting plate is connected between the top and/or the bottom of the adjacent casing column on one side and is a strip-shaped steel plate.
Furthermore, the temporary support system comprises a frame column hoop connected to the frame column, a casing hoop connected to the casing string, a horizontal support connected between the frame column hoop and the casing hoop, and an inclined support connected between the frame column hoop and the connecting plate.
Furthermore, the frame column hoop is hinged with an inclined strut, and the inclined strut is fixedly connected with the connecting plate; the outer side surface of the frame column hoop is connected with a connecting piece for hinging an inclined strut.
Furthermore, the inclined strut and the horizontal strut are both rod pieces and can be spliced and connected.
Furthermore, a horizontal support is connected between the casing hoops on the adjacent casing strings.
The beneficial effects of the utility model are embodied in:
1) the utility model, through the arrangement of the sleeve column, on one hand, is convenient for prefabricating the support column on site and saving the template, on the other hand, the binding force of the sleeve improves the strength of the concrete; the cost can be saved by selecting a plastic sleeve, a steel sleeve and the like according to the stress requirement;
2) the utility model can connect the adjacent casing strings through the arrangement of the connecting plate, thereby not only improving the integrity between the casing strings, but also enlarging the stress area;
3) the utility model discloses a setting of interim braced system can share the atress of casing string, and the level among the interim braced system props and can carry out the level to the casing string and spacing prevent its lateral displacement.
In addition, horizontal braces and inclined braces in the temporary support system are designed in an assembling mode and are adjustable in angle, so that the temporary support system can be greatly adapted to field conditions, and convenient construction is guaranteed; the utility model can be adapted to the site construction greatly, and the construction cost is saved;
additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description.
Drawings
FIG. 1 is a schematic construction view of a casing string support post-cast strip connection structure;
FIG. 2 is a top plan view of a casing string support post-cast strip joint construction;
FIG. 3 is a schematic cross-sectional view of a casing string;
FIG. 4 is a schematic view of a casing string and web connection;
FIG. 5 is a schematic view a of a casing string coupled to a temporary support system;
FIG. 6 is a schematic view b of the connection of the casing string to the temporary support system;
fig. 7 is a schematic structural view of the temporary support system.
Reference numerals: 1-frame column, 2-frame beam, 21-frame main beam, 22-frame secondary beam, 3-basement top plate, 4-basement bottom plate, 5-top plate post-cast strip, 6-bottom plate post-cast strip, 7-casing string, 71-casing pipe, 72-concrete, 73-support column rib, 74-support hoop rib, 8-connecting plate, 9-temporary support system, 91-frame column hoop, 92-casing hoop, 93-horizontal support, 94-connecting piece and 95-inclined support.
Detailed Description
Taking a basement of a certain building as an example, the basement is rectangular and is provided with a floor, frame columns 1 are arranged at four corners of the basement, and the frame columns 1 are arranged at intervals in the longitudinal direction. The frame column 1 is provided with a frame beam 2, wherein the basement is provided with a frame main beam 21 in the long direction and a frame secondary beam 22 in the short direction. The basement top plate 3 is paved on the frame beam 2, wherein post-cast strips are symmetrically arranged on the basement top plate 3 and the basement bottom plate 4 at intervals.
As shown in fig. 1 and 2, a casing string 7 is arranged at the post-cast strip of the basement to support the post-cast strip connection structure, and the connection structure comprises a basement top plate 3, a top plate post-cast strip 5 arranged at the top plate 3 of the basement, a basement bottom plate 4, a bottom plate post-cast strip 6 arranged on the basement bottom plate 4 and vertically located at the same position as the top plate post-cast strip 5, and a casing string 7 connected between the top plate post-cast strip 5 and two sides of the bottom plate post-cast strip 6.
In the embodiment, the casing string 7 is connected to one side of the bottom plate post-cast strip 6 and the top plate post-cast strip 5, and the distance between the top of the casing string 7 and the top of the adjacent top plate post-cast strip 5 is not less than 200 mm; the distance between the bottom of the casing string 7 and the post-cast strip 6 close to the bottom plate is not less than 200 mm. The casing strings 7 are arranged at intervals in the length direction of the top plate post-cast strip 5 and the bottom plate post-cast strip 6, and are arranged at least under the frame secondary beam 22.
As shown in fig. 3, in this embodiment, the casing string 7 is a prefabricated string, which includes a casing 71, and steel bars and concrete 72 in the casing 71. The sleeve 71 is a cylindrical or square pipe, and the sleeve 71 is made of a steel pipe or a plastic pipe; the reinforcing bar contains four support post muscle 73 that are square distribution at least and connects in the support stirrup 74 of support post muscle 73 outside.
As shown in fig. 4, the connecting device further comprises a connecting plate 8 connected between the top and/or the bottom of one side of the adjacent casing string 7, wherein the connecting plate 8 is a strip-shaped steel plate. The top and/or the bottom of the casing string 7 are integrally connected through the connecting plate 8, and the stress stability of the casing string is ensured.
As shown in fig. 5 to 7, the connection structure further includes a temporary support system 9, wherein the temporary support system 9 includes a frame pillar hoop 91 sleeved on the frame pillar 1, a casing hoop 92 sleeved on the casing string 7, a horizontal support 93 screwed between the frame pillar hoop 91 and the casing hoop 92, and a diagonal support 95 hinged between the frame pillar hoop 91 and the connecting plate 8. Wherein the horizontal support 93 and the inclined support 95 can be arranged in multiple ways according to the design requirement.
In this embodiment, the frame pillar hoop 91 is hinged to the inclined strut 95, and the inclined strut 95 is welded or screwed to the connecting plate 8; the outer side of the frame column hoop 91 is welded with a connecting piece 94 for hinging a diagonal brace 95. The diagonal brace 95 and the horizontal brace 93 are both steel rod pieces, and both can be spliced and connected. Horizontal braces 93 are connected between casing hoops 92 on adjacent casing strings 7.
The distance between the 1 net of the engineering frame column is 5.1m multiplied by 8.1m, the height of the structural layer is 4.5m, through checking calculation of bearing capacity and stability, circular casing strings 7 with the diameter of 200mm are determined to be arranged at the beam ends at two sides of the post-cast strip and the edges of the large-span non-support plates at two sides of the post-cast strip, the span of the non-support plates at two sides of the post-cast strip is larger than 7.75m, and the circular casing strings 7 are arranged in the middle of the post-cast. The casing string 7 is arranged at a position 200mm away from the post-cast strip, the casing 71 is a PVC pipe, and the wall thickness of the PVC casing pipe is 11 mm.
During construction, the casing string 7 support should be positioned on the bottom plate first, and the position of the casing string 7 is determined to be 200mm away from the post-sedimentation casting strip. In addition, when the common beam plate formwork is installed and concrete is poured, construction of supporting of the casing strings 7 is conducted at the same time, after the beam plates and the casing strings 7 are supported to reach the designed strength, all formwork supports are removed, and at the moment, beam plates on two sides of the post-cast strip are supported by the preset casing strings 7. And the casing strings 7 on the two sides of the post-cast strip and the concrete of the frame column 1 are poured and maintained at the same time.
In the embodiment, the thickness of the top plate 3 of the basement at the two sides of the post-cast strip is 180mm, the concrete strength is C35, the maximum span plate is 2300mm multiplied by 7750mm, and the widths of the top plate post-cast strip 5 and the bottom plate post-cast strip 6 are 800 mm. N1=0.35 × 0.7 × 2.3+0.35 × 0.7 × 2.3+7.75 × 2.3 × 0.18 mn × 25kN/m high yield stress from the template weight division 2+2.3 × 8.1 × 2.0kN/m high yield stress from 91.46 kN/m high yield stress
The casing string 7 parameters are: concrete grade C35, fc ═ 16.7N/mm, casing string 7 diameter =200mm, four secondary steel bars of diameter 12mm were provided within casing string 7, stirrups of diameter 6mm, spacing 200 mm. The casing string 7 is calculated to be of maximum length h =4320 mm. Determining a stability coefficient phi: =21.2 calculated axial force design value of 356.389kN >91.46kN
The bearing capacity N = 356.389kN >91.46kN of the casing string 7 meets the design requirements. The deflection limit = l0/300=7750/300=25.8mm meets the design requirements. The calculation result meets the deflection limit value but is close to the limit value, so that the structural damage caused by overlarge stressed deflection deformation of the plate due to the temporary disconnection of the large-span plate by the post-cast strip is prevented. Namely, the span of the non-support plates at the two sides of the post-cast strip is larger than 7.75m, and a casing string 7 is arranged at the middle part of the plate span so as to ensure reasonable stress.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be considered by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention.

Claims (9)

1. A connecting structure of a post-cast strip supported by a casing string is characterized by comprising a basement top plate (3), a top plate post-cast strip (5) arranged at the position of the basement top plate (3), a basement bottom plate (4), a bottom plate post-cast strip (6) which is arranged on the basement bottom plate (4) and is vertically positioned at the same position as the top plate post-cast strip (5), and a casing string (7) connected between the top plate post-cast strip (5) and two sides of the bottom plate post-cast strip (6);
the casing string (7) is a prefabricated string and comprises a casing (71) and steel bars and concrete (72) in the casing (71).
2. The casing string supporting post-cast strip connection structure as recited in claim 1, wherein the casing (71) is a cylindrical or square pipe, and the casing (71) is made of a steel pipe or a plastic pipe; the reinforcing bar contains four support column muscle (73) that are square distribution at least and connects in support hoop muscle (74) in support column muscle (73) outside.
3. The casing string supporting post-cast strip connection structure as recited in claim 2, characterized in that the casing string (7) is connected to one side of the bottom plate post-cast strip (6) and the top plate post-cast strip (5), and the distance between the top of the casing string (7) and the adjacent top plate post-cast strip (5) is not less than 200 mm; the distance between the bottom of the casing string (7) and the post-cast strip (6) close to the bottom plate is not less than 200 mm.
4. A casing string supporting post-cast strip connection structure as claimed in claim 3, characterized in that the casing string (7) is arranged at a distance in the longitudinal direction between the top sheet post-cast strip (5) and the bottom sheet post-cast strip (6) and at least under the frame sub-beams (22).
5. The casing string supporting post-cast strip connection structure as recited in claim 1, further comprising a connecting plate (8) connected between the top and/or bottom of one side adjacent casing string (7), wherein the connecting plate (8) is a strip steel plate.
6. The casing string supporting post-cast strip connection structure as recited in claim 5, further comprising a temporary support system (9), wherein the temporary support system (9) comprises a frame column hoop (91) connected to the frame column (1), a casing hoop (92) connected to the casing string (7), a horizontal brace (93) connected between the frame column hoop (91) and the casing hoop (92), and a diagonal brace (95) connected between the frame column hoop (91) and the connecting plate (8).
7. The casing string supporting post-cast strip connection structure as recited in claim 6, characterized in that the frame column hoop (91) is hinged with the inclined strut (95), and the inclined strut (95) is fixedly connected with the connecting plate (8); the outer side surface of the frame column hoop (91) is connected with a connecting piece (94) for hinging an inclined strut (95).
8. The casing string supporting post-cast strip connection structure as recited in claim 6 in which the diagonal brace (95) and the horizontal brace (93) are rod members, both of which are assembled.
9. The casing string supporting post-cast strip connection structure as recited in claim 6, characterized in that horizontal braces (93) are connected between casing hoops (92) of adjacent casing strings (7).
CN202021670704.7U 2020-08-12 2020-08-12 Post-cast strip connection structure is supported to casing string Expired - Fee Related CN213268892U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021670704.7U CN213268892U (en) 2020-08-12 2020-08-12 Post-cast strip connection structure is supported to casing string

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Application Number Priority Date Filing Date Title
CN202021670704.7U CN213268892U (en) 2020-08-12 2020-08-12 Post-cast strip connection structure is supported to casing string

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CN213268892U true CN213268892U (en) 2021-05-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114541809A (en) * 2022-02-15 2022-05-27 中国十七冶集团有限公司 Supporting system for building structure pouring and construction process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114541809A (en) * 2022-02-15 2022-05-27 中国十七冶集团有限公司 Supporting system for building structure pouring and construction process

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Granted publication date: 20210525