CN112343077A - High-pile bearing platform tower footing reinforcing construction method for improving reliability and reinforcing structure thereof - Google Patents
High-pile bearing platform tower footing reinforcing construction method for improving reliability and reinforcing structure thereof Download PDFInfo
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- CN112343077A CN112343077A CN202011373255.4A CN202011373255A CN112343077A CN 112343077 A CN112343077 A CN 112343077A CN 202011373255 A CN202011373255 A CN 202011373255A CN 112343077 A CN112343077 A CN 112343077A
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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
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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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
Abstract
The invention discloses a high-pile bearing platform tower footing reinforcing construction method and a reinforcing structure thereof, which can improve the reliability, wherein the construction method comprises the following steps: arranging vertical and horizontal lacing bars among the lattice columns; adjusting the length of the exposed part of the lattice column according to the earth excavation depth; adjusting the combined structure of the vertical batten strips according to the verticality of the lattice column; arranging horizontal batten strips at the positions with the same elevation of the floor slab reinforcing steel bars, continuously installing the floor slab reinforcing steel bars and the templates at intervals at lattice columns, and synchronously pouring concrete and the floor slab at the lattice columns; the method is suitable for reinforcing construction of the tower foundation of the high-pile bearing platform with the height of more than 10m, ensures the safety and the reasonability of the batten plate type lattice column, ensures the safety and the reliability of the use of the tower crane, meets the requirement of safety calculation, and realizes the reinforcement treatment of the tower crane foundation.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a high-pile cap tower footing reinforcement construction method and a reinforcement structure thereof, which can improve reliability.
Background
Along with the increase of the area of a foundation pit and the increase of deep foundation pit engineering, in order to meet the requirements of the transportation of materials in the deep foundation pit and the construction period of projects, the used tower crane mostly adopts a form of a high-pile bearing platform foundation, and in order to ensure the use safety and reliability of the tower crane and meet the requirement of safety calculation, the tower crane foundation needs to be reinforced. In order to meet the requirements of transportation of materials in the deep foundation pit and the construction period of a project, the project mostly adopts a form of a tower-hung high bearing platform foundation. The decorated plate type lattice column combined foundation is most commonly applied to a tower crane foundation high bearing platform, but corresponding parameter values are only filled according to software requirements under most conditions during design, and the mastering of design key points is not clear. Meanwhile, lattice column construction is usually carried out by a pile foundation sub-packaging unit, the construction quality control difficulty is high, meanwhile, the construction site has high extrusion to the tower crane lattice column, and the lattice column is easy to incline and deform. Therefore, a high-pile cap tower foundation reinforcement construction method and a reinforcement structure thereof are needed, which provide a reliable reinforcement technology for such a high-pile cap tower crane foundation and improve the reliability, so as to be suitable for the reinforcement construction of the high-pile cap tower foundation with a height of more than 10m and ensure the safety and the reasonability of batten plate type lattice columns.
Disclosure of Invention
The invention provides a high-pile cap tower footing reinforcement construction method for improving reliability and a reinforcement structure thereof, which solve the problems that in the prior art, corresponding parameter values are only filled according to software requirements, and the mastering of design key points is not clear. Meanwhile, lattice column construction is usually conducted by a pile foundation subpackage unit, the construction quality control difficulty is high, meanwhile, the tower crane lattice column is greatly extruded by a construction site, the problems of inclination, deformation and the like of the lattice column are easily caused, the lattice column is suitable for reinforcing construction of a high pile cap tower foundation of more than 10m, the safety and the reasonability of the batten plate type lattice column are ensured, the use safety and the use reliability of a tower crane are ensured, the safety calculation requirement is met, and the reinforcing treatment of the tower crane foundation is realized.
The invention provides a high pile cap tower footing reinforcing construction method for improving reliability, which comprises the following steps,
vertical lacing bars and horizontal supporting pieces (2) are arranged among the lattice columns (1);
according to the verticality of the lattice column (1), the combined structure of the vertical batten strip is adjusted;
the horizontal supporting piece (2) is arranged at the position of the same elevation of the floor slab steel bar, the floor slab steel bar and the template are continuously installed at the lattice column (1) at intervals, and the concrete and the floor slab are synchronously poured at the lattice column (1).
The reinforcing structure of the high-pile cap tower footing reinforcing construction method for improving reliability comprises the latticed columns (1), wherein the number of the latticed columns (1) is usually four, the exact number of the latticed columns is determined by the number of pile foundations, and vertical batten strips and horizontal supporting pieces (2) are connected between every two adjacent latticed columns (1); the level is located the same elevation position department at the floor reinforcing bar to support piece (2) setting, and lattice column (1) department installs continuously at interval floor reinforcing bar, template, and synchronous concreting and floor of lattice column (1) department.
The construction method for reinforcing the high-pile cap tower footing capable of improving the reliability can be optimized, and the combined structure of the vertical batten strip can be adjusted to be Z-shaped according to the verticality of the lattice column (1).
In the reinforcement structure of the high pile cap foundation reinforcement construction method for improving reliability, it is also preferable that the combined structure of the vertical batten is in a zigzag shape.
The construction method for reinforcing the high-pile cap tower footing capable of improving the reliability can be optimized, and the combined structure of the vertical batten strip can be adjusted to be in a cross shape according to the verticality of the lattice column (1).
In the reinforcement structure of the method for reinforcing a high pile cap foundation with improved reliability, it is preferable that the combination structure of the vertical batten is a cross shape.
According to the construction method for reinforcing the high-pile cap foundation with improved reliability, preferably, when the combined structure of the vertical batten strips is adjusted to be in a cross shape, a vertical diagonal bracing combined structure (3) is additionally arranged between two vertical diagonal bracing combined structures (3) adjacent to each other up and down, the upper end of the additionally arranged vertical diagonal bracing combined structure (3) is overlapped with the lower end of the upper vertical diagonal bracing combined structure (3), and the lower end of the additionally arranged vertical diagonal bracing combined structure (3) is overlapped with the upper end of the lower vertical diagonal bracing combined structure (3).
The reinforcing structure of the high pile cap foundation reinforcing construction method for improving reliability may also be preferably configured such that a vertical diagonal brace combined structure (3) is additionally arranged between two vertical diagonal brace combined structures (3) adjacent to each other up and down, the upper end of the additionally arranged vertical diagonal brace combined structure (3) is overlapped with the lower end of the upper vertical diagonal brace combined structure (3), and the lower end of the additionally arranged vertical diagonal brace combined structure (3) is overlapped with the upper end of the lower vertical diagonal brace combined structure (3).
According to the construction method for reinforcing the high-pile cap tower footing, which improves the reliability, the horizontal support piece (2) can be preferably set to be the vertical inclined support combined structure (3).
The reinforcing structure of the high pile cap foundation reinforcing construction method for improving reliability can also be preferably arranged in a vertical inclined strut combined structure (3) by the horizontal support piece (2).
The invention can achieve the following beneficial effects:
the high-pile cap tower footing reinforcing construction method and the reinforcing structure thereof for improving the reliability can solve the problems that the prior art only fills corresponding parameter values according to software requirements, and the mastering of design key points is not clear. Meanwhile, lattice column construction is usually conducted by a pile foundation subpackage unit, the construction quality control difficulty is high, meanwhile, the tower crane lattice column is greatly extruded by a construction site, the problems of inclination, deformation and the like of the lattice column are easily caused, the lattice column is suitable for reinforcing construction of a high pile cap tower foundation of more than 10m, the safety and the reasonability of the batten plate type lattice column are ensured, the use safety and the use reliability of a tower crane are ensured, the safety calculation requirement is met, and the reinforcing treatment of the tower crane foundation is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flow chart of the high pile cap foundation reinforcement construction method for improving reliability according to the present invention.
Fig. 2 is a schematic structural view of a lattice column and a tower crane pile of a reinforcing structure of the high pile cap foundation reinforcing construction method for improving reliability of the invention.
Fig. 3 is a schematic view of a lattice column-added vertical diagonal bracing combined structure of the reinforcement structure of the high pile cap foundation reinforcement construction method for improving reliability of the present invention.
Fig. 4 is a cross-sectional view a-a of fig. 2 and 3.
Fig. 5 is a sectional view taken along line b-b in fig. 2.
Fig. 6 is a schematic structural diagram of the a node in fig. 2 and 3.
Fig. 7 is a schematic structural diagram of the node B in fig. 2 and 3.
Fig. 8 is a schematic structural diagram of the node C in fig. 5.
Fig. 9 is a schematic structural view of a truss of a reinforcing structure of the high pile cap foundation reinforcing construction method for improving reliability according to the present invention.
In the figure, 1 is a lattice column, 2 is a horizontal support piece, 3 is a vertical inclined strut combined structure, 4 is a high pile cap, 5 is a ground storehouse top plate, 6 is a water stop steel plate, 7 is a civil air defense area top plate, 8 is a foundation bottom plate, 9 is a pile top, 10 is a support truss and 11 is a mattress layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
A construction method for strengthening a high pile cap tower footing with improved reliability is shown in figure 1, and comprises the following steps,
vertical batten strips and horizontal supporting pieces 2 are arranged among the lattice columns 1;
adjusting the combined structure of the vertical batten strips according to the verticality of the lattice column 1;
and arranging the horizontal support piece 2 at the position with the same elevation of the floor slab steel bar, continuously installing the floor slab steel bar and the template at the lattice column 1 at intervals, and pouring the concrete and the floor slab at the lattice column 1 synchronously.
The reinforcing structure of the high pile cap foundation reinforcing construction method for improving reliability, as shown in fig. 2 and 4 to 8, comprises lattice columns 1, the number of the lattice columns 1 is usually four, the exact number of the lattice columns is determined by the number of pile foundations, and vertical batten strips and horizontal supporting pieces 2 are connected between adjacent lattice columns 1; the level is to support piece 2 settings in the same elevation position department of floor reinforcing bar, and 1 continuous interval in lattice column installs floor reinforcing bar, template, 1 synchronous concreting in lattice column department of concrete and floor.
According to the construction method and the structure for reinforcing the tower footing of the high-pile cap, which are used for improving the reliability, the vertical batten and the horizontal support piece 2 are poured into the floor slab, and the overhanging length of the overhanging end is adjusted, so that the high-pile structure is more stable.
Wherein, the vertical batten is driven into the pile together with the lattice column 1. The horizontal support 2 constitutes a horizontal support structure.
Example 2
The construction method for reinforcing a high-rise pile cap foundation, which is described in embodiment 1, and which improves reliability may further include adjusting a combined structure of the vertical batten strips to be in a zigzag shape according to a verticality of the lattice column 1.
The reinforcing structure of the high pile cap foundation reinforcing construction method for improving reliability may be further configured such that the combined structure of the vertical batten strips is in a zigzag shape.
Example 3
The construction method for reinforcing a high pile cap foundation with improved reliability according to embodiment 1 may further include, as shown in fig. 3 and 4, and fig. 6 and 7, adjusting the combined structure of the vertical batten strips to be cross-shaped according to the verticality of the lattice column 1.
The reinforcing structure of the high pile cap foundation reinforcing construction method for improving reliability may further have a cross-shaped combined structure of the vertical batten in fig. 2.
Example 4
The construction method for reinforcing a tower footing of a high pile cap, according to embodiment 3, may further include, as shown in fig. 3, when the combined structure of the vertical batten is adjusted to be in a cross shape, adding a vertical diagonal bracing combined structure 3 between two vertical diagonal bracing combined structures 3 adjacent to each other, where an upper end of the added vertical diagonal bracing combined structure 3 overlaps with a lower end of the upper vertical diagonal bracing combined structure 3, and a lower end of the added vertical diagonal bracing combined structure 3 overlaps with an upper end of the lower vertical diagonal bracing combined structure 3. In fig. 3, a dotted line indicates the added vertical diagonal bracing combined structure 3.
Then, the reinforcing structure of the high pile cap foundation reinforcing construction method for improving reliability may also be further configured such that a vertical diagonal brace combined structure 3 is additionally provided between two vertical diagonal brace combined structures 3 adjacent to each other above and below, the upper end of the additionally provided vertical diagonal brace combined structure 3 overlaps with the lower end of the upper vertical diagonal brace combined structure 3, and the lower end of the additionally provided vertical diagonal brace combined structure 3 overlaps with the upper end of the lower vertical diagonal brace combined structure 3.
Wherein, the vertical inclined strut combined structure 3 can be adjusted along with the field condition.
The construction method for reinforcing the high-pile cap tower footing for improving the reliability can further set the horizontal support piece 2 into a cross-shaped combined structure.
The reinforcing structure of the high pile cap foundation reinforcing construction method for improving reliability may be further configured such that the horizontal support member 2 is configured as a cross-shaped combined structure, as shown in fig. 5.
It should be noted that the concrete form of the lacing bar is determined according to the verticality and height of the lattice column 1. In general, when the verticality of the lattice column 1 is well controlled, the vertical batten can be arranged in a zigzag combined structure. Along with the change of the earth excavation depth, the exposed length of the lattice column 1 is increased, and then the installation of the vertical batten strip and the horizontal support piece 2 is completed gradually. The high pile cap 4 tower footing that 1 straightness control of the lattice column is relatively poor or 1 high of lattice column, vertical lacing bar can set up to vertical bracing integrated configuration 3. When the verticality of the lattice column 1 is extremely poor, the vertical diagonal bracing combined structure 3 of the vertical batten strip can be additionally arranged between the upper vertical diagonal bracing combined structure 3 and the lower vertical diagonal bracing combined structure 3 on the basis of the vertical batten strip of the vertical diagonal bracing combined structure 3.
Specifically, if the verticality and height of the lattice column 1 are divided into three levels, namely, a first-level verticality, a second-level verticality and a third-level verticality, and a first-level height, a second-level height and a third-level height, wherein the first-level verticality is superior to the second-level verticality, the second-level verticality is superior to the third-level verticality, the first-level height is smaller than the second-level height, and the second-level; the verticality of the lattice column 1 is a first-level verticality, or the height of the lattice column 1 is a first-level height, the vertical batten strip may be configured as a zigzag combined structure. The verticality of the lattice column 1 is a secondary verticality, or when the height of the lattice column 1 is a secondary height, the vertical batten strip can be set as a vertical diagonal bracing combined structure 3. The verticality of the lattice column 1 is a three-level verticality, or when the height of the lattice column 1 is a three-level height, the vertical diagonal bracing combined structure 3 of the vertical bracing strip can be additionally arranged between the upper vertical diagonal bracing combined structure 3 and the lower vertical diagonal bracing combined structure 3 on the basis of the vertical bracing strip of the vertical diagonal bracing combined structure 3.
In addition, the lattice column 1 may be a rectangular column, and the vertical batten strips may be respectively disposed on the outer side walls of the lattice column 1, that is, the four outer side walls of the lattice column 1 are all provided with the vertical batten strips, or a zigzag combined structure of the vertical batten strips, or the vertical sprag combined structure 3 additionally provided with the vertical sprag combined structure 3. As shown in fig. 6 and 7, the structural schematic diagrams of the node a and the node B of the reinforcement structure of the high pile cap foundation reinforcement construction method for improving reliability are respectively shown, and the batten strip of the zigzag combined structure, the vertical diagonal bracing combined structure 3, or the vertical diagonal bracing combined structure 3 with the vertical diagonal bracing combined structure 3 added may be an angle steel structure, which may be a double-sided single-limb angle steel, or a double-sided double-limb angle steel, that is, a single angle steel with two equal-width side surfaces, or a double-sided double-limb angle steel with two equal-width side surfaces; when the batten strip is a combined structure with two angle steels with the same width side faces, the two angle steels form a combined structure welded back to back, namely the bending directions of the two angle steels extend back to back, and the adjacent side faces of the two angle steels are welded and connected.
In order to meet other requirements of an engineering structure, the reinforcing structure of the high-pile cap tower foundation reinforcing construction method for improving reliability of the embodiment is specially arranged at the position connected with the engineering structure within the range of the lattice column 1, wherein the water-stop steel plates 6 are arranged at the intersection parts of the foundation bottom plate 8, the civil air defense area top plate 7 and the ground reservoir top plate 5.
Example 5
In the construction method for reinforcing a high-rise pile cap foundation with improved reliability according to any of the embodiments, as shown in fig. 9, two sides of one or two or three of the top plate 5 of the basement, the top plate 7 of the civil air defense area, the foundation slab 8 and the lattice column 1 may be respectively connected with a supporting truss 10. The supporting truss 10 may be configured as a horizontal transverse structure, an oblique structure, or a combined connection structure of an oblique structure and a horizontal transverse structure, for example, the supporting truss 10 may be configured as a triangular structure composed of two upper oblique structures and two lower horizontal transverse structures, and is an isosceles triangular structure. The support truss 10 may be provided as a channel-welded truss.
Further, a mattress layer 11 is provided between the foundation sole 8 and the pile top 9.
Similarly, in the reinforcing structure of the high pile cap foundation reinforcing construction method for improving reliability according to any one of the embodiments, the two sides of one or two or three of the basement roof 5, the civil air defense area roof 7, the foundation slab 8 and the lattice column 1 may be connected to the supporting truss 10. The supporting truss 10 is configured as a horizontal transverse structure or an oblique structure, or a combined connection structure of an oblique structure and a horizontal transverse structure, for example, the supporting truss 10 is a triangular structure formed by two upper oblique structures and two lower horizontal transverse structures, and is an isosceles triangle structure. The support truss 10 may be a channel welded truss.
Further, a mattress layer 11 is provided between the foundation sole 8 and the pile top 9.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A high pile cap tower footing reinforcing construction method for improving reliability is characterized by comprising the following steps,
vertical lacing bars and horizontal supporting pieces (2) are arranged among the lattice columns (1);
according to the verticality of the lattice column (1), the combined structure of the vertical batten strip is adjusted;
the horizontal supporting piece (2) is arranged at the position of the same elevation of the floor slab steel bar, the floor slab steel bar and the template are continuously installed at the lattice column (1) at intervals, and the concrete and the floor slab are synchronously poured at the lattice column (1).
2. The high pile cap foundation reinforcement construction method for improving reliability according to claim 1, wherein the combined structure of the vertical batten is adjusted to be zigzag according to the verticality of the lattice column (1).
3. The high pile cap foundation reinforcement construction method for improving reliability according to claim 1, wherein the combination structure of the vertical batten is adjusted to be cross-shaped according to the verticality of the lattice column (1).
4. The high pile cap foundation reinforcement construction method for improving reliability according to claim 3, wherein when the combined structure of the vertical batten strip is adjusted to be in a cross shape, a vertical diagonal bracing combined structure (3) is additionally arranged between two vertical diagonal bracing combined structures (3) adjacent to each other, the upper end of the additionally arranged vertical diagonal bracing combined structure (3) is overlapped with the lower end of the upper vertical diagonal bracing combined structure (3), and the lower end of the additionally arranged vertical diagonal bracing combined structure (3) is overlapped with the upper end of the lower vertical diagonal bracing combined structure (3).
5. The high pile cap foundation reinforcement construction method for improving reliability according to claim 1, wherein the horizontal support member (2) is provided as a vertical diagonal bracing combined structure (3).
6. The reinforcing structure of the high pile cap foundation reinforcement construction method for improving reliability according to any one of claims 1 to 5, comprising lattice columns (1), wherein the number of the lattice columns (1) is at least two, and vertical lacing bars and horizontal supporting members (2) are connected between adjacent lattice columns (1); the level is located the same elevation position department at the floor reinforcing bar to support piece (2) setting, and lattice column (1) department installs continuously at interval floor reinforcing bar, template, and synchronous concreting and floor of lattice column (1) department.
7. The reinforcing structure of a high pile cap foundation reinforcing construction method with improved reliability according to claim 6, wherein the combined structure of the vertical batten strip is zigzag.
8. The reinforcing structure of a high pile cap foundation reinforcing construction method with improved reliability according to claim 6, wherein the combined structure of the vertical batten strip is in a cross shape.
9. The reinforcing structure of the high pile cap foundation reinforcing construction method for improving reliability according to claim 8, wherein a vertical diagonal bracing combined structure (3) is additionally arranged between two vertical diagonal bracing combined structures (3) adjacent to each other up and down, the upper end of the additionally arranged vertical diagonal bracing combined structure (3) is overlapped with the lower end of the upper vertical diagonal bracing combined structure (3), and the lower end of the additionally arranged vertical diagonal bracing combined structure (3) is overlapped with the upper end of the lower vertical diagonal bracing combined structure (3).
10. The reinforcement structure for a high pile cap foundation reinforcement construction method for improving reliability according to claim 6, wherein the horizontal support member (2) is provided as a vertical sprag composite structure (3).
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| CN202011373255.4A CN112343077A (en) | 2020-11-30 | 2020-11-30 | High-pile bearing platform tower footing reinforcing construction method for improving reliability and reinforcing structure thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011373255.4A CN112343077A (en) | 2020-11-30 | 2020-11-30 | High-pile bearing platform tower footing reinforcing construction method for improving reliability and reinforcing structure thereof |
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| CN203795458U (en) * | 2014-03-31 | 2014-08-27 | 上海绿地建设(集团)有限公司 | Bearing-platform-free lattice-type tower crane foundation device capable of traversing basement |
| CN205242429U (en) * | 2015-12-17 | 2016-05-18 | 中国建筑第二工程局有限公司 | Independent fixed tower crane basis |
| CN107299643A (en) * | 2017-07-10 | 2017-10-27 | 杭州江润科技有限公司 | Steel lattice column combined type tower crane foundation structure in foundation pit and construction method |
| CN108086344A (en) * | 2017-12-20 | 2018-05-29 | 中铁十局集团城市轨道交通工程有限公司 | A kind of lattice tower-crane foundation structure and construction method |
| CN111056460A (en) * | 2019-12-17 | 2020-04-24 | 上海建工七建集团有限公司 | Assembled tower crane maintenance platform and installation method |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203795458U (en) * | 2014-03-31 | 2014-08-27 | 上海绿地建设(集团)有限公司 | Bearing-platform-free lattice-type tower crane foundation device capable of traversing basement |
| CN205242429U (en) * | 2015-12-17 | 2016-05-18 | 中国建筑第二工程局有限公司 | Independent fixed tower crane basis |
| CN107299643A (en) * | 2017-07-10 | 2017-10-27 | 杭州江润科技有限公司 | Steel lattice column combined type tower crane foundation structure in foundation pit and construction method |
| CN108086344A (en) * | 2017-12-20 | 2018-05-29 | 中铁十局集团城市轨道交通工程有限公司 | A kind of lattice tower-crane foundation structure and construction method |
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