CN114961338A - Temporary support method for top plate of PC (polycarbonate) assembly type engineering basement - Google Patents
Temporary support method for top plate of PC (polycarbonate) assembly type engineering basement Download PDFInfo
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- CN114961338A CN114961338A CN202210256186.1A CN202210256186A CN114961338A CN 114961338 A CN114961338 A CN 114961338A CN 202210256186 A CN202210256186 A CN 202210256186A CN 114961338 A CN114961338 A CN 114961338A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/02—Shores or struts; Chocks non-telescopic
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
A temporary supporting method for a top plate of a PC assembly type engineering basement is characterized by comprising the following steps: a. marking the driving route on the basement roof, b, arrange the PC component yard on the basement roof, c, set up the constructional column at the entrance to a cave, d, mark out the position that needs to support in the driving route map, e, set up the shaped steel bracing piece in post-cast strip both sides, f, all support members accomplish simultaneously at the pouring basement roof, g, steel sheet, shaped steel, reinforcing bar and roof reinforcing bar are under construction in step, h, set up the isolation railing along driving route both sides, i, accomplish in the hoist and mount of basement roof upper portion PC component. The temporary supporting method for the top plate of the PC assembly type engineering basement has the advantages of simple supporting and reinforcing measures and structure, convenience in manufacturing, safe and reliable engineering quality, and rapidness and simplicity in both the function and the dismounting of the rear dismounting support frame at a part of the rear pouring zone which can be replaced by the rear pouring zone area.
Description
Technical Field
The invention relates to a temporary support for a basement top plate, in particular to a temporary support method for a PC (personal computer) assembly type engineering basement top plate.
Background
Along with the improvement of the technology of the prefabricated building in China, the construction capacity is stronger and stronger, and the prefabricated assembly rate is higher and higher. The major structure of building is mostly prefabricated in the mill, because of prefabricated in the mill can hold the quality more than site operation. Therefore, a large amount of prefabricated parts are transported, lifted and installed on the construction site. And the volume and weight of the processed components are increased, so that the requirements on hoisting equipment are high, and higher requirements on construction roads on site are also provided. According to the characteristics of modern buildings, newly built buildings, particularly large public buildings and houses, all have a huge basement, and the hoisting of a large number of prefabricated components needs to be carried out on the large-area basement top plate as a component storage yard and a component transportation road, so that the basement top plate needs to bear certain load gravity before being formally closed. Like traditional building, the prefabricated building roof also needs to bear the additional load of various construction machinery and equipment facilities, for example the impact load tower crane when people and goods elevator lift base stops to the roof passes roof reservation entrance to a cave department board, the roof reinforcement that the roof beam is temporarily cut off weak returns the top. The basement top plate cannot be closed during the lifting of the PC component due to the existence of the post-cast strip, and the two top plates are separated by the post-cast strip, so that the bearing weakness of the post-cast strip area is caused.
The conventional basement roof is reinforced by adopting a steel pipe scaffold support or a steel section support after the form removal. But the secondary roof return is carried out after the templates and the supports are removed, and the basement roof generates unrecoverable downwarping deformation and microcracks in the middle time period of removing the template supports and adding the supports again, so that the concrete structure of the roof is influenced, and the quality and safety problems are possibly caused in the later use.
The known basement roof reinforcement therefore suffers from the inconveniences and problems described above.
Disclosure of Invention
The invention aims to provide a safe and reliable temporary support method for a top plate of a PC (personal computer) assembly type engineering basement.
In order to achieve the purpose, the technical solution of the invention is as follows:
a temporary supporting method for a top plate of a PC assembly type engineering basement is characterized by comprising the following steps:
a. marking a driving route range on a basement top plate after determining the transportation road route of the precast concrete member and the heavy material transportation vehicle for concrete and steel bars;
b. arranging a PC component temporary storage yard and a discharging parking area on a top plate of the basement to avoid a tower crane entrance area; the storage yard is arranged at the dense part of the beam column of the top plate, and the boundary of the storage yard is arranged to the beam and column edges of the top plate;
c. at the weak part of the tower crane opening, when a beam is cut off, the end parts of the cut-off beams corresponding to the opening are respectively provided with reinforced concrete constructional columns; the concrete of the reinforced concrete constructional column has the same mark number as that of the top plate concrete, at least four through-length steel bars and stirrups are arranged at intervals of 250mm, and the through-length steel bars are not anchored into the bottom plate and the top plate beam;
d. marking a part needing to be supported and reinforced in a driving route diagram, wherein the part is a supporting point for supporting and reinforcing the bottom of a main beam; finding out all main beams along the length direction of a driving route, and arranging a support piece in the middle of each main beam;
e. arranging concrete or section steel supporting rods at the positions of the post-cast strip staggered with the travelling crane line and at the two ends of the cut beams on the two sides of the post-cast strip;
f. all the support rod pieces are arranged when the top plate of the basement is poured, concrete is poured simultaneously on the concrete constructional column support and the top plate, and secondary back jacking after form removal is avoided;
g. when the top plate formwork support frame is erected, the positions of the support upright posts are adjusted at the corresponding beam bottoms needing to be supported, steel plates, section steel, steel bars and top plate steel bars are constructed synchronously, and the formworks are erected synchronously;
h. after the support arranged on the top plate is formed, when a driving route is finally determined and before a vehicle is normally driven, hard isolation railings are arranged along the side lines on the two sides of the driving route so as to forcibly guide the vehicle to drive, and the isolation railings can be erected by scaffold steel pipes or tool-type shaped fences and the like. Personnel pass through the two sides of the isolation railings, and vehicles pass through a route formed by the two isolation railings, so that the people and the vehicles are shunted;
i. and the PC component is hoisted on the upper part of the top plate of the basement, large vehicles do not need to pass on the top plate any more, and the support rod pieces are dismantled after the post-cast strip is closed.
The temporary supporting method for the top plate of the PC assembly type engineering basement can be further realized by adopting the following technical measures.
The method of the preceding, wherein the size of the formation column is determined by the size of the top load, the length of the formation column, and the cross-sectional size of the formation column is not less than 200 x 200 mm.
In the method, the top and the bottom of the construction column are provided with enlarged heads to increase the supporting area and increase the stability.
In the method, the supporting member is a concrete constructional column, i-shaped steel or double-spliced channel steel can be used as the section steel support, but the size is not less than 18#, and square supporting steel plates are welded at the top and the bottom of the section steel.
In the method, the diameter of the through-length steel bar is more than or equal to 12 mm.
In the method, the diameter of the stirrup is more than or equal to 8 mm.
After the technical scheme is adopted, the temporary supporting method for the top plate of the PC assembled engineering basement has the following advantages:
1. the supporting and reinforcing measures have simple structure and convenient manufacture;
2. the construction quality is safe and reliable, compared with the prior art that secondary roof return is carried out after the form removal, the secondary roof return effect is good, and the quality problem of the beam plate cannot be caused; the post-cast strip area can replace the function of a part of post-dismantling support frame at the post-cast strip position;
3. compared with the traditional supporting mode, the supporting device is simpler and more convenient and practical, is quick and simple to install and remove, and reduces the engineering cost.
Drawings
FIG. 1 is a schematic view of a support structure for section steel according to an embodiment of the present invention;
FIG. 2 is a schematic view of a concrete construction column support structure according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a schematic view of a post-cast strip support structure according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a PC component temporary storage yard layout according to an embodiment of the present invention.
In the figure: the structure of the basement is characterized by comprising 1 basement top plate, 2 beams, 3 steel plates, 4I-shaped steel, 5 welding seams, 6 basement bottom plates, 7 column top expansion heads, 8 constructional columns, 9 column bottom expansion heads, 10 main beams, 11 secondary beams, 12 supporting pieces, 13 post-pouring belts, 14 holes, 15 main building areas and 16 component yard.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Example 1
The invention discloses a temporary supporting method for a top plate of a PC (personal computer) fabricated engineering basement, which comprises the following steps of:
1. a driving route range is marked on a basement top plate 1 after the routes of prefabricated components and transportation roads of heavy material transportation vehicles such as concrete and steel bars are determined, a parallel post-pouring zone is avoided or kept away as far as possible, the driving route range is close to a building main building area 15 where PC components need to be hoisted as far as possible, and a turning radius, a vehicle collection area and the like are set.
2. Temporary PC component storage 16 and a discharge parking area (ensuring that PC component vehicles do not affect the passage of other vehicles when being discharged) are arranged on the top plate, and a larger hole 14 area is avoided as much as possible. The storage yard is arranged at the dense part of the beam column of the top plate as much as possible, and the boundary is arranged at the beam and column edge of the top plate. FIG. 5 is a schematic diagram of a PC component temporary storage yard layout according to an embodiment of the present invention.
3. At the weak department of tower crane entrance to a cave, when having roof beam 2 to be cut off, set up reinforced concrete constructional column respectively at the tip that corresponds the entrance to a cave cutting beam. The size of the constructional column is determined according to the size of top load (transport vehicles, machinery and the like) and the length of the constructional column, the size is not less than 200 x 200mm, concrete has the same mark number with a top plate, at least four steel bars with the whole length phi 12 and at least 250mm intervals between the steel bars with the whole length phi 8 are arranged, the steel bars with the whole length are not anchored into a bottom plate and a top plate beam (convenient to detach), and the top and the bottom of the constructional column are provided with a column top enlarged head 7 and a column bottom enlarged head 9, so that the area of a supporting top is increased, and the stability is increased. The steel bars in the concrete constructional column are determined according to the stress calculation, and the constructional steel bars are properly additionally arranged in the middle of the four sides. Fig. 2 is a schematic view of a concrete construction post support structure according to an embodiment of the present invention, and fig. 3 is a sectional view a-a of fig. 2.
4. The part needing supporting and reinforcing is marked in the set running route diagram, the part is taken as a supporting point for supporting and reinforcing at the bottom of the main beam, all the main beams are found along the length direction of the running route, and the support piece 12 is arranged in the middle of the beam. The support piece can adopt the concrete constructional column, can also adopt I-steel 4 or double-spliced channel steel etc. as shaped steel support, but the size is no less than 18#, at shaped steel top and bottom with the welding seam 5 welding square supporting steel plate 3. The clearance between the beam bottom and the basement bottom plate 6 is calculated when the section steel supports blanking, and the steel plates of the upper support cushion and the lower support cushion are not buried in concrete, so that the steel plates are convenient to disassemble and recycle in the later period. When the desired erection support point is close to the intersection of the primary beam 10 and the secondary beam 11 (no more than 300 mm), the support is placed at the intersection of the primary and secondary beams. The calculation of upper load stress, cost economy, site construction conditions, the need for demolition and recovery, the need for construction period urgency and the like should be comprehensively considered when selecting a specific reinforced concrete constructional column support or a section steel support. Fig. 1 is a schematic view of a profile steel support structure according to an embodiment of the present invention, wherein a beam bottom template is centrally provided with an opening, and the template is 250 x 250.
5. And supports (concrete or section steel supports) are arranged at the positions of the post-cast strip crossed with the travelling crane line and at the two ends of the cut beam on the two sides of the post-cast strip. FIG. 4 is a schematic view of a post-cast strip support structure according to an embodiment of the invention.
6. All supports are arranged when the basement roof is poured, concrete is poured into the concrete constructional column supports and the roof simultaneously, and secondary back jacking after form removal is avoided.
7. When the top plate formwork support frame is erected, the positions of the supporting upright rods are adjusted at the corresponding beam bottoms needing to be supported, steel plates, section steel, reinforcing steel bars and the like are constructed synchronously with the top plate reinforcing steel bars, and the formwork is erected synchronously.
8. After the support arranged on the top plate is formed, when a driving route is finally determined and before a vehicle is normally driven, hard isolation railings are arranged along the side lines on the two sides of the driving route so as to forcibly guide the vehicle to drive, and the isolation railings can be erected by scaffold steel pipes or tool-type shaped fences and the like. Personnel pass through the two sides of the isolation railings, and vehicles pass through a route formed by the two isolation railings, so that the people and the vehicles are shunted;
9. and after the hoisting of the upper PC component is finished, the large vehicle does not need to pass on the top plate any more and the support is removed after the post-cast strip is closed.
The temporary support method for the top plate of the PC assembly type engineering basement has the substantial characteristics and obvious technical progress, does not need to be subjected to secondary back jacking after a template is removed, and is directly formed with the top plate of the basement once to bear upper load.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.
Claims (6)
1. A PC assembly type engineering basement top plate temporary supporting method is characterized by comprising the following steps:
a. marking a driving route range on a basement top plate after determining the transportation road route of the precast concrete member and the heavy material transportation vehicle for concrete and steel bars;
b. arranging a PC component temporary storage yard and a discharging parking area on a top plate of the basement to avoid a tower crane entrance to a cave area; the storage yard is arranged at the dense part of the beam column of the top plate, and the boundary of the storage yard is arranged to the beam and column edges of the top plate;
c. at the weak part of the tower crane opening, when a beam is cut off, the end parts of the cut-off beams corresponding to the opening are respectively provided with reinforced concrete constructional columns; the concrete of the reinforced concrete constructional column has the same mark number as that of the top plate concrete, at least four through-length steel bars are arranged, the distance between the stirrups is 250mm, and the through-length steel bars are not anchored into the bottom plate and the top plate beam;
d. marking a part needing supporting and reinforcing in a driving route diagram, wherein the part is a supporting point for supporting and reinforcing the bottom of a main beam; finding out all main beams along the length direction of a driving route, and arranging a support piece in the middle of each main beam;
e. arranging concrete or section steel supporting rods at the positions of the post-cast strip staggered with the travelling crane line and at the two ends of the cut beams on the two sides of the post-cast strip;
f. setting all the support rods at the same time when the top plate of the basement is poured, and pouring concrete on the concrete constructional column support and the top plate at the same time so as not to perform secondary back jacking after the form removal;
g. when the top plate formwork support frame is erected, the positions of the support upright posts are adjusted at the corresponding beam bottoms needing to be supported, steel plates, section steel, steel bars and top plate steel bars are constructed synchronously, and the formworks are erected synchronously;
h. after the support arranged on the top plate is formed, when a driving line is finally determined and before a vehicle is normally driven, hard isolation railings are arranged along side lines on two sides of the driving line so as to forcibly guide the vehicle to drive, wherein the isolation railings can be erected by scaffold steel pipes or tool-type shaped fences and the like;
personnel pass through the two sides of the isolation railings, and vehicles pass through a route formed by the two isolation railings, so that the people and the vehicles are shunted;
i. and the PC component is hoisted on the upper part of the top plate of the basement, large vehicles do not need to pass on the top plate any more, and the support rod pieces are dismantled after the post-cast strip is closed.
2. The method for temporarily supporting the ceiling of the PC fabricated engineering basement of claim 1, wherein the size of the construction pillars is determined according to the size of the top load and the length of the construction pillars, and the cross-sectional size of the construction pillars is not less than 200 x 200 mm.
3. The method for temporarily supporting the ceiling of the PC fabricated engineering basement as claimed in claim 1, wherein the top and bottom of the construction column are provided with enlarged heads to increase the area of the supporting top and to increase the stability.
4. The method for temporarily supporting the top plate of the PC fabricated engineering basement as claimed in claim 1, wherein the supporting members are concrete constructional columns, i-beams or double-spliced channel beams can be used as profile steel supports, but the size is no less than 18#, and square supporting steel plates are welded on the top and the bottom of the profile steel.
5. The temporary supporting method for the top plate of the PC assembled engineering basement as claimed in claim 1, wherein the diameter of the through-length steel bar is more than or equal to 12 mm.
6. The temporary supporting method for the top plate of the PC fabricated engineering basement as claimed in claim 1, wherein the diameter of the stirrup is more than or equal to 8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210256186.1A CN114961338A (en) | 2022-03-16 | 2022-03-16 | Temporary support method for top plate of PC (polycarbonate) assembly type engineering basement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210256186.1A CN114961338A (en) | 2022-03-16 | 2022-03-16 | Temporary support method for top plate of PC (polycarbonate) assembly type engineering basement |
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| CN114961338A true CN114961338A (en) | 2022-08-30 |
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| CN202210256186.1A Pending CN114961338A (en) | 2022-03-16 | 2022-03-16 | Temporary support method for top plate of PC (polycarbonate) assembly type engineering basement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116290867A (en) * | 2023-02-28 | 2023-06-23 | 中国五冶集团有限公司 | Construction method for temporarily supporting and reinforcing basement beam plates by using constructional column core column |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649197A (en) * | 2016-01-31 | 2016-06-08 | 江苏扬建集团有限公司 | Post-pouring belt construction method conducted under green-landscape-first condition |
| CN110258651A (en) * | 2019-07-16 | 2019-09-20 | 中城投集团第六工程局有限公司 | Basement roof post-cast strip shifts to an earlier date enclosed construction and construction method |
| CN210421182U (en) * | 2019-07-16 | 2020-04-28 | 中城投集团第六工程局有限公司 | Basement roof post-cast strip seals structure in advance |
-
2022
- 2022-03-16 CN CN202210256186.1A patent/CN114961338A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105649197A (en) * | 2016-01-31 | 2016-06-08 | 江苏扬建集团有限公司 | Post-pouring belt construction method conducted under green-landscape-first condition |
| CN110258651A (en) * | 2019-07-16 | 2019-09-20 | 中城投集团第六工程局有限公司 | Basement roof post-cast strip shifts to an earlier date enclosed construction and construction method |
| CN210421182U (en) * | 2019-07-16 | 2020-04-28 | 中城投集团第六工程局有限公司 | Basement roof post-cast strip seals structure in advance |
Non-Patent Citations (2)
| Title |
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| 朱凯波: "地下室顶板上设置施工道路的施工技术" * |
| 朱刚: "地下室顶板在上有压重时的加固措施及承载性能分析" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116290867A (en) * | 2023-02-28 | 2023-06-23 | 中国五冶集团有限公司 | Construction method for temporarily supporting and reinforcing basement beam plates by using constructional column core column |
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Application publication date: 20220830 |