CN111074924A - Supporting template for foundation bearing platform under column and construction method thereof - Google Patents
Supporting template for foundation bearing platform under column and construction method thereof Download PDFInfo
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- CN111074924A CN111074924A CN201911418693.5A CN201911418693A CN111074924A CN 111074924 A CN111074924 A CN 111074924A CN 201911418693 A CN201911418693 A CN 201911418693A CN 111074924 A CN111074924 A CN 111074924A
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- 238000010276 construction Methods 0.000 title claims abstract description 19
- 238000002474 experimental method Methods 0.000 claims abstract description 3
- 238000009424 underpinning Methods 0.000 claims description 11
- 239000004567 concrete Substances 0.000 claims description 10
- 238000009412 basement excavation Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000009415 formwork Methods 0.000 claims description 3
- 238000009417 prefabrication Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000011449 brick Substances 0.000 description 11
- 238000000465 moulding Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
- 239000011469 building brick Substances 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
The invention discloses a supporting template for a foundation bearing platform under a column, which comprises a plurality of PC board units, wherein the PC board units are mutually vertically and fixedly connected end to form a rectangular frame supporting template structure; the construction method comprises the following steps: prefabricating a PC plate unit → transporting and hoisting the PC plate unit → measuring and positioning a bearing platform foundation → excavating earthwork → pouring a cushion layer → positioning a template elastic line → hoisting and fixing a supporting template → fine tuning for a secondary experiment → backfilling a foundation. The supporting template for the foundation bearing platform under the column has the characteristics of simple structure, strong applicability, strong bearing capacity and convenient construction.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a supporting template for a foundation bearing platform under a column and a construction method thereof.
Background
In the present building engineering, high-rise or super high-rise building, no matter be independent foundation, bar basis, still raft foundation, the foundation portion under the post often need dig out the local deeper foundation ditch, carries out concrete placement and forms cushion cap basis to promote basic bearing capacity. In the traditional construction process, the foundations are often constructed by using brick moulding beds, bricks are built around a foundation pit bearing platform to position and shape the foundations, the reinforcement and support effects of the bearing platform foundation during concrete pouring are achieved, and the brick moulding beds have the following problems:
1. the brick bed film has poor waterproof function, needs waterproof materials and cement mortar painting for matching to prevent water, and has complex process;
2. the brick moulding bed consumes a large amount of labor, and a large amount of manpower and material resources are required for carrying and building bricks during the construction of the brick moulding bed, so that the time is long;
3. the precision of the brick moulding bed is not easy to control, the brick moulding bed has technical and proficiency requirements on masonry workers, and a construction manager needs to use an instrument to carry out dynamic monitoring and control;
4. the anti-bending and anti-shearing capacity of the brick moulding bed is small, when the height of the section is more than 500mm, the backfill depth is deeper, and the backfill ramming is real-time, so that the brick moulding bed is easy to damage and deform;
5. the cement mortar used for the brick moulding bed needs a certain time for setting and hardening, which is not beneficial to construction in a construction period.
Disclosure of Invention
The invention aims to provide a supporting template for a foundation bearing platform under a column and a construction method thereof, and the supporting template has the characteristics of simple structure, strong applicability, strong pressure bearing capacity and convenience in construction.
The invention can be realized by the following technical scheme:
the invention discloses a supporting template for a foundation bearing platform under a column, which comprises a plurality of PC board units, wherein the PC board units are mutually vertically and fixedly connected end to form a rectangular frame supporting template structure, the PC board units are of a composite board structure, one end part of each PC board unit is concavely embedded with a countersunk screw, the other end part of each PC board unit is provided with a fixing hole parallel to the section of the end part, and the PC board units are embedded into countersunk screws of the other PC board unit through the fixing holes by fixing bolts so as to realize the vertical connection of the end to end of different PC board units.
Furthermore, the PC board unit is a three-layer composite board structure and comprises an outer bearing plate and an inner bearing plate, and the inner wall of the inner bearing plate is compounded with an inner shaping plate.
Furthermore, the outer wall of interior bearing plate is equipped with a plurality of hoistingholes, and the even interval in hoistinghole sets up, effectively guarantees that every PC board unit has 2 hoistingholes at least, reduces the operation degree of difficulty of hoist and mount.
Furthermore, the end parts of the outer bearing plate and the outer bearing plate are all pre-buried and provided with countersunk screws, and the other end parts of the outer bearing plate and the inner bearing plate are provided with fixing holes corresponding to the countersunk screws. The corresponding relation between the two is based on the consideration of ensuring that components are matched and lapped when the PC board units are connected, reducing the stress of the components caused by system errors, ensuring that the PC board cannot be broken when being driven to pass through a poplar, and meeting the requirements of the positions of the prefabricated reserved fixing holes and the embedded countersunk head screws of the PC board units, wherein the error value is less than or equal to 5 mm. In the butt joint installation, when finding that because of the bed course roughness, component production error leads to its overlap joint not counterpoint, the accessible chisels out bed course surface or increases the cushion for a short time and adjusts.
Furthermore, the fixing bolt is M10 or M14, and the length of the fixing bolt is 3-5 cm larger than the thickness of the PC board unit. In practical applications, the length of the fixing screw can be determined according to the size of the PC board unit, and M14 bolt is used when the size of the PC board unit is larger. The countersunk head screw corresponds to the type of the adopted bolt.
Furthermore, the countersunk head screws are arranged at the positions 1/4-3/4 of the section height of the end part of the PC board unit, so that the stress is more uniform; the depth of the inner recess of the countersunk head screw is 5-10 cm, so that the fixing effect is ensured; the aperture of the countersunk head screw is 1-2 mm larger than the diameter of the fixing screw, so that the assembly and the fixation are convenient.
Further, the thickness of the PC board unit is 80-150 mm. The thickness of the PC board unit is considered based on the strength of concrete, C25 or C30 concrete is generally adopted, so that 80-150 mm is selected to be proper, the tensile performance of the PC board unit is limited due to the fact that the strength of the concrete is improved, and when the calculation bearing bending does not meet the conditions, the bearing performance of the PC board unit is improved through reinforcing bars.
Another aspect of the present invention is a method of constructing a supporting formwork for an underpinning foundation cap, comprising the steps of: prefabricating a PC plate unit → transporting and hoisting the PC plate unit → measuring and positioning a bearing platform foundation → excavating earthwork → pouring a cushion layer → positioning a template elastic line → hoisting and fixing a supporting template → fine tuning for a secondary experiment → backfilling a foundation.
Further, the construction method of the support template for the foundation bearing platform under the column comprises the following steps:
s1, preparation phase
Prefabrication and hoisting of PC board unit components: manufacturing a PC board unit according to the size of a bearing platform of a design drawing, reserving a hoisting hole and a fixing hole, embedding a countersunk head screw, and enabling the fixing hole to correspond to the countersunk head screw; after the PC board unit is processed, the PC board unit is transported through the hoisting hole;
excavation of a foundation pit and foundation treatment: excavating foundation earthwork of the bearing platform by adopting a manual cooperation machine, pouring a concrete cushion layer after the excavation is finished, controlling the flatness of the cushion layer, and performing positioning elastic line and surface cleaning;
s2, PC board splicing and mounting
The PC board units are transported to a bearing platform foundation pit through a hoisting and transporting hole, fixing holes of the transversely placed PC board units are butted with countersunk screws of the vertically placed PC board units according to positioning pins, the positions of the fixing holes are matched and correspond to those of the countersunk screws, the fixing holes are screwed and connected by using the fixing screws, a rectangular frame template pattern is assembled, and the positions of the rectangular frame template pattern are rechecked and adjusted;
s3, backfilling the foundation pit
And backfilling and compacting the multi-excavation part at the periphery of the supporting template by using benign soil, wherein the backfilling and compacting are carried out at the same time symmetrically, and the displacement caused by uneven stress on two sides of the template is avoided.
The invention relates to a supporting template for a foundation bearing platform under a column and a construction method thereof, which have the following beneficial effects:
the structure is simple, the assembly and the forming are carried out at one time, the installation is convenient, the construction is convenient, and the manpower and material resources are saved;
secondly, the applicability is strong, the position is convenient to adjust, the positioning accuracy of the bearing platform foundation is high, the product size is fixed, the accuracy is high, and the quality of the concrete bearing platform finished product is good;
thirdly, the bearing capacity is strong, the strength and the application range of the bearing platform basic template are improved through the supporting template, and for some foundation pits with large depth, the inner support can be eliminated through reinforcement so as to meet the strength requirement;
and fourthly, construction is convenient, and each board surface of the PC board unit is a whole, so that waterproof construction is convenient in regions with bad underground water environments.
Drawings
FIG. 1 is a schematic diagram of the general structure of a support template for an underpinning foundation bearing platform according to the present invention;
FIG. 2 is a partially enlarged structural view of a support template A for an under-column foundation bearing platform according to the present invention;
FIG. 3 is a schematic structural view of the front side of a PC board unit of a supporting template for a foundation bearing platform under a column according to the present invention;
FIG. 4 is a schematic side view of a PC board unit of a support template for an underpinning foundation bearing platform according to the present invention;
the reference numbers in the drawings include: 1. a PC board unit; 2. hoisting holes; 3. a fixing hole; 4. countersunk screws; 5. and (5) fixing the bolt.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the following detailed description of the present invention is provided with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 4, the invention discloses a supporting template for a foundation bearing platform under a column, which comprises a plurality of PC board units 1, wherein the PC board units 1 are mutually vertically and fixedly connected end to form a rectangular frame supporting template structure, the PC board units 1 are of a composite board structure, one end part of each PC board unit 1 is concavely embedded with a countersunk screw 4, the other end part is provided with a fixing hole 3 parallel to the section of the end part, and the PC board units 1 penetrate through the fixing holes 3 through fixing bolts 5 and are embedded into the countersunk screws 4 of the other PC board unit 1 to realize the vertical connection of the end to end of different PC board units 1.
As shown in fig. 3, the PC board unit 1 is a three-layer composite board structure, and includes an outer bearing plate and an inner bearing plate, wherein an inner shaping plate is combined with an inner wall of the inner bearing plate.
As shown in fig. 3, the outer wall of the inner bearing plate is provided with a plurality of lifting holes 2, and the lifting holes 2 are uniformly spaced.
As shown in fig. 3, countersunk screws 4 are embedded in the end portions of the outer bearing plate and the outer bearing plate, and fixing holes 3 corresponding to the countersunk screws 4 are formed in the other end portions of the outer bearing plate and the inner bearing plate.
In the present embodiment, the fixing bolt 5 is M10 or M14, and the length of the fixing bolt 5 is 3-5 cm greater than the thickness of the PC board unit 1.
As shown in fig. 2 and 3, the position of the countersunk head screw 4 is set at the height 1/4-3/4 of the cross section of the end of the PC board unit 1, and the depth of the indent of the countersunk head screw 4 is 5-10 cm; the aperture of the countersunk head screw 4 is 1-2 mm larger than the diameter of the fixing screw.
As shown in FIG. 3, the thickness of the PC board unit 1 is 80 to 150 mm.
In the invention, the stress principle of the supporting template is as follows: the supporting template of the rectangular frame bears the horizontal load action: foundation ditch backfill side direction soil pressure, the horizontal effort that groundwater produced gives the side cotton for the PC board unit, and the PC board unit bears the bending action and converts the load into line application through both ends with the surface stress and transmits for adjacent both ends PC board unit, and the effort converts pressure into, and mutual effect each other is for supporting, forms good atress system each other.
When the size of the bearing platform is not very large and the span and the height of the PC plate are small, the bearing requirement is completely met by utilizing the characteristic of the strength of concrete. When the bearing platform with overlarge size appears, the PC board has large span and the backfill soil is deeper, the PC board can be reinforced by checking the bearing capacity to bear larger bending moment load without damaging
Example 2
Another aspect of the present invention is a method of constructing a supporting formwork for an underpinning foundation cap, comprising the steps of: prefabricating a PC plate unit → transporting and hoisting the PC plate unit → measuring and positioning a bearing platform foundation → excavating earthwork → pouring a cushion layer → positioning a template elastic line → hoisting and fixing a supporting template → fine tuning for a secondary inspection → backfilling a foundation; the method comprises the following specific steps:
s1, preparation phase
Prefabrication and hoisting of PC board unit components: manufacturing a PC board unit according to the size of a bearing platform of a design drawing, reserving a hoisting hole and a fixing hole, embedding a countersunk head screw, and enabling the fixing hole to correspond to the countersunk head screw; after the PC board unit is processed, the PC board unit is transported through the hoisting hole;
excavation of a foundation pit and foundation treatment: excavating foundation earthwork of the bearing platform by adopting a manual cooperation machine, pouring a concrete cushion layer after the excavation is finished, controlling the flatness of the cushion layer, and performing positioning elastic line and surface cleaning;
s2, PC board splicing and mounting
The PC board units are transported to a bearing platform foundation pit through a hoisting and transporting hole, fixing holes of the transversely placed PC board units are butted with countersunk screws of the vertically placed PC board units according to positioning pins, the positions of the fixing holes are matched and correspond to those of the countersunk screws, the fixing holes are screwed and connected by using the fixing screws, a rectangular frame template pattern is assembled, and the positions of the rectangular frame template pattern are rechecked and adjusted;
s3, backfilling the foundation pit
And backfilling and compacting the multi-excavation part at the periphery of the supporting template by using benign soil, wherein the backfilling and compacting are carried out at the same time symmetrically, and the displacement caused by uneven stress on two sides of the template is avoided.
In the description of the present invention, it is to be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate orientations or positional relationships, are used based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and for the simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above embodiments are only specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.
Claims (9)
1. The utility model provides a support template for foundation cushion cap under post, includes a plurality of PC board units, its characterized in that: the PC board units are mutually vertically and fixedly connected end to form a rectangular frame supporting template structure, the PC board units are of a composite laminate structure, one end of each PC board unit is provided with a countersunk screw in a concave embedded mode, the other end of each PC board unit is provided with a fixing hole parallel to the section of the end, and the PC board units penetrate through the fixing holes through fixing bolts to be embedded into the countersunk screws of the other PC board unit to achieve the purpose of vertically connecting the end to the end of different PC board units.
2. A support template for an underpinning foundation cap as claimed in claim 1, wherein: the PC board unit is a three-layer composite board structure and comprises an outer bearing plate and an inner bearing plate, wherein an inner shaping plate is compounded on the inner wall of the inner bearing plate.
3. A support template for an underpinning foundation cap as claimed in claim 2, wherein: the outer wall of interior bearing plate is equipped with a plurality of hoistingholes, the even interval in hoistinghole sets up.
4. A support template for an underpinning foundation cap as claimed in claim 3, wherein: the tip of outer bearing plate, outer bearing plate is all pre-buried to be equipped with the countersunk screw, another tip of outer bearing plate, interior bearing plate is equipped with the fixed orifices that corresponds with the countersunk screw.
5. A support template for an underpinning foundation cap as claimed in claim 4, wherein: the fixing bolt is M10 or M14, and the length of the fixing bolt is 3-5 cm greater than the thickness of the PC board unit.
6. A support template for an underpinning foundation cap as claimed in claim 5, wherein: the countersunk head screw is arranged at the position of 1/4-3/4 of the section height of the end part of the PC board unit, and the concave depth of the countersunk head screw is 5-10 cm; the aperture of the countersunk head screw is 1-2 mm larger than the diameter of the fixing screw.
7. The support template for an underpinning foundation cap of claim 6, wherein: the thickness of the PC board unit is 80-150 mm.
8. A construction method of a supporting template for an underpinned foundation bearing platform is characterized by comprising the following steps: prefabricating a PC plate unit → transporting and hoisting the PC plate unit → measuring and positioning a bearing platform foundation → excavating earthwork → pouring a cushion layer → positioning a template elastic line → hoisting and fixing a supporting template → fine tuning for a secondary experiment → backfilling a foundation.
9. The construction method of a support formwork for an underpinning foundation cap as claimed in claim 8, characterized by comprising the steps of:
s1, preparation phase
Prefabrication and hoisting of PC board unit components: manufacturing a PC board unit according to the size of a bearing platform of a design drawing, reserving a hoisting hole and a fixing hole, embedding a countersunk head screw, and enabling the fixing hole to correspond to the countersunk head screw; after the PC board unit is processed, the PC board unit is transported through the hoisting hole;
excavation of a foundation pit and foundation treatment: excavating foundation earthwork of the bearing platform by adopting a manual cooperation machine, pouring a concrete cushion layer after the excavation is finished, controlling the flatness of the cushion layer, and performing positioning elastic line and surface cleaning;
s2, PC board splicing and mounting
The PC board units are transported to a bearing platform foundation pit through a hoisting and transporting hole, fixing holes of the transversely placed PC board units are butted with countersunk screws of the vertically placed PC board units according to positioning pins, the positions of the fixing holes are matched and correspond to those of the countersunk screws, the fixing holes are screwed and connected by using the fixing screws, a rectangular frame template pattern is assembled, and the positions of the rectangular frame template pattern are rechecked and adjusted;
s3, backfilling the foundation pit
And backfilling and compacting the multi-excavation part at the periphery of the supporting template by using benign soil, wherein the backfilling and compacting are carried out at the same time symmetrically, and the displacement caused by uneven stress on two sides of the template is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911418693.5A CN111074924A (en) | 2019-12-31 | 2019-12-31 | Supporting template for foundation bearing platform under column and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911418693.5A CN111074924A (en) | 2019-12-31 | 2019-12-31 | Supporting template for foundation bearing platform under column and construction method thereof |
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| CN111074924A true CN111074924A (en) | 2020-04-28 |
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| CN201911418693.5A Pending CN111074924A (en) | 2019-12-31 | 2019-12-31 | Supporting template for foundation bearing platform under column and construction method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209649032U (en) * | 2019-01-31 | 2019-11-19 | 青岛东捷建设工程有限公司 | A kind of bearing platform prefabrication concrete mould plate structure |
| CN110512635A (en) * | 2019-08-28 | 2019-11-29 | 中国十七冶集团有限公司 | A kind of regularization template is in lower pier base support device and its construction method |
| CN212801616U (en) * | 2019-12-31 | 2021-03-26 | 广西建工集团第五建筑工程有限责任公司 | Supporting template for foundation bearing platform under column |
-
2019
- 2019-12-31 CN CN201911418693.5A patent/CN111074924A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209649032U (en) * | 2019-01-31 | 2019-11-19 | 青岛东捷建设工程有限公司 | A kind of bearing platform prefabrication concrete mould plate structure |
| CN110512635A (en) * | 2019-08-28 | 2019-11-29 | 中国十七冶集团有限公司 | A kind of regularization template is in lower pier base support device and its construction method |
| CN212801616U (en) * | 2019-12-31 | 2021-03-26 | 广西建工集团第五建筑工程有限责任公司 | Supporting template for foundation bearing platform under column |
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