CN113323010A - Construction method of embedded tower crane foundation - Google Patents
Construction method of embedded tower crane foundation Download PDFInfo
- Publication number
- CN113323010A CN113323010A CN202110532115.5A CN202110532115A CN113323010A CN 113323010 A CN113323010 A CN 113323010A CN 202110532115 A CN202110532115 A CN 202110532115A CN 113323010 A CN113323010 A CN 113323010A
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- tower crane
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- steel lattice
- lattice columns
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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
- E02D27/44—Foundations for machines, engines or ordnance
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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
-
- 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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- 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)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a construction method of an embedded tower crane foundation, which specifically comprises the following steps: A. preparation before construction; B. constructing a pile foundation; C. and (5) installing and constructing the tower crane. According to the invention, a novel tower crane foundation construction method is adopted, the construction is further improved according to the original construction strategy, and more detailed material limitation is formulated according to the improved construction process, so that the crack quality control of mass concrete is achieved, the construction efficiency is further improved, and the actual engineering time can be reduced by combining with a construction organization flow schedule in the actual engineering.
Description
Technical Field
The invention relates to the field of building construction, in particular to a construction method of an embedded tower crane foundation.
Background
The tower crane is the most common hoisting equipment on the construction site, also known as tower crane, and is lengthened section by section for hoisting construction raw materials such as reinforcing steel bars, wood ridges, concrete, steel pipes and the like. The tower crane is an indispensable equipment on the building site, and the tower crane foundation construction of formula of burying has been played gradually to the foundation construction of tower crane now for save engineering time and reduce construction cost.
However, the existing construction method of an embedded tower crane foundation usually uses more concrete, especially for large-volume concrete, due to temperature difference and material properties, cracks are easily generated in the concrete due to excessive aggregate impurities and poor later maintenance, and once a process error occurs in the construction process of the process, the strength of the whole concrete is reduced, so that rework in the construction process is caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an embedded tower crane foundation construction method.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to a construction method of an embedded tower crane foundation, which specifically comprises the following steps:
A. preparing before construction, determining soil quality data of geological survey data in a target site, determining lofting confirmation of a tower crane foundation in a foundation pit area, and manufacturing steel reinforcement cages of steel lattice columns and bored piles outside the site;
B. constructing a pile foundation, namely constructing a cast-in-situ bored pile before a foundation pit is not excavated, synchronously completing the installation and positioning of the steel lattice column, and then pouring concrete of the cast-in-situ bored pile;
C. and (3) tower crane installation and construction, namely, steel bar binding and hidden beam steel bar binding are carried out on the lower bottom surface of a concrete bearing platform, the concrete bearing platform is poured, then, the position of a tower crane is installed, excavation is carried out on the first layer of earthwork of the foundation pit, steel inclined rods and horizontal rods are welded on steel lattice columns in the height of the first layer of earthwork, and horizontal cross braces are arranged until the foundation pit is excavated to the required height.
And B, as a preferable technical scheme of the invention, the total number of the steel lattice columns in the step B is five, the positions of the five steel lattice columns are respectively vertically arranged at four corners and the center of the five steel lattice columns, and a reinforcement cage is further installed when the cast-in-situ bored pile is constructed.
As a preferred technical scheme of the invention, the top end between the steel lattice columns is connected with a cross beam, the cross beam is a hidden beam and is positioned in the bearing platform, the reinforcement cage and the steel lattice columns are in electric welding lap joint, the electric welding lap joint length is not less than 3 m, and the main reinforcement is ensured to be connected with the steel lattice columns.
As a preferred technical scheme of the invention, steel cross braces are further arranged between the steel lattice columns, the steel cross braces are arranged in a zigzag shape, the distance between the cross braces is 6-7 m, and the top ends of the steel lattice columns are further provided with groined connecting beams.
According to a preferable technical scheme of the invention, the concrete grade of the cast-in-place pile in the step B is not less than C20, the aggregate is not more than 30mm, the slump is 50-70 mm, and the protection thickness of the cast-in-place pile concrete is not less than 60-80 mm.
As a preferred technical scheme of the present invention, in the step C, the reinforced concrete cushion is excavated to a required height, that is, the reinforced concrete cushion is poured on the ground, and the concrete grade of the reinforced concrete cushion is not less than C15.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, a novel tower crane foundation construction method is adopted, the construction is further improved according to the original construction strategy, and more detailed material limitation is formulated according to the improved construction process, so that the crack quality control of mass concrete is achieved, the construction efficiency is further improved, and the actual engineering time can be reduced by combining with a construction organization flow schedule in the actual engineering.
Detailed Description
The following description is presented in conjunction with the preferred embodiments of the present invention, and it is to be understood that the preferred embodiments described herein are presented only for the purpose of illustrating and explaining the present invention, and are not intended to limit the present invention.
Example 1
The invention provides a construction method of an embedded tower crane foundation, which specifically comprises the following steps:
A. preparing before construction, determining soil quality data of geological survey data in a target site, determining lofting confirmation of a tower crane foundation in a foundation pit area, and manufacturing steel reinforcement cages of steel lattice columns and bored piles outside the site;
B. constructing a pile foundation, namely constructing a cast-in-situ bored pile before a foundation pit is not excavated, synchronously completing the installation and positioning of the steel lattice column, and then pouring concrete of the cast-in-situ bored pile;
C. and (3) tower crane installation and construction, namely, steel bar binding and hidden beam steel bar binding are carried out on the lower bottom surface of a concrete bearing platform, the concrete bearing platform is poured, then, the position of a tower crane is installed, excavation is carried out on the first layer of earthwork of the foundation pit, steel inclined rods and horizontal rods are welded on steel lattice columns in the height of the first layer of earthwork, and horizontal cross braces are arranged until the foundation pit is excavated to the required height.
And furthermore, in the step B, the total number of the steel lattice columns is five, the positions of the five steel lattice columns are respectively vertically arranged at four corners and the center of the five steel lattice columns, and a reinforcement cage is further installed during the construction of the cast-in-situ bored pile.
The top is connected with the cross beam between the steel lattice column, and its cross beam sets up for the hidden beam, is located the cushion cap inside, for electric welding the overlap joint between steel reinforcement cage and the steel lattice column, and its electric welding overlap joint length is not less than 3 meters, and ensures that main muscle and steel lattice column are connected.
And steel bridging is further installed between the steel lattice columns, the steel bridging is arranged in a zigzag shape, the distance between the steel bridging is 6-7 m, and the top ends of the steel lattice columns are further provided with groined connecting beams.
And in the step B, the concrete grade of the cast-in-place pile is C20, the aggregate is not more than 30mm, the slump is 50-70 mm, and the concrete protection thickness of the cast-in-place pile is not less than 60-80 mm.
And C, excavating to a required height, namely pouring a reinforced concrete cushion layer on the ground, wherein the concrete grade of the reinforced concrete cushion layer is C15.
Specifically, the construction method is refined based on a construction site of a certain project, the main processes are that the construction lofting positioning of a tower crane, the design calculation of a tower crane foundation and the manufacture of a steel reinforcement cage of a steel lattice column and a bored concrete pile are all carried out synchronously, namely, the processes in the step A are completed synchronously, then the construction process in the step B can be used for construction, the tower crane material entering and single module building operation are also carried out synchronously within the range of 200m on-site distance in the process of strictly welding according to the bored concrete pile and the reinforcement cage in the construction site, and the tower crane material module assembling stage is carried out in the processes in the step B and the step C until the pouring of the concrete bearing platform in the step C is completed;
and C, in the process of simply installing the tower body, synchronously excavating the earthwork of the foundation pit, namely finishing the excavation part of the foundation pit in the step C, immediately detecting the deflection and the strength of the steel lattice column by field detection personnel in the excavation process of the foundation pit, synchronously detecting in real time, judging by actual calculation under the condition of increasing a small amount of load, and if only trying to install one layer of tower body or only installing one layer of partial rod piece so as to ensure that the construction processes are all within a safety range, further shortening the construction period.
In the construction process, the film is required to cover for the maintenance of the concrete, the adopted cast-in-place piles, the concrete cushion and the concrete bearing platform are all concrete grades with relatively average strength so as to increase the efficiency in the maintenance process, particularly the surface watering process, a uniform construction process can be formed, the adopted bottom aperture aggregate and high protection thickness can also reduce the surface cracks generated by increasing the load while increasing the overall strength.
According to the invention, by adopting a novel tower crane foundation construction method, the construction is further improved according to the original construction strategy, and more detailed material limitation is formulated according to the improved construction process, so that the crack quality control of mass concrete is achieved, the efficiency in construction is further increased, the actual engineering time can be reduced by combining with a construction organization flow schedule in actual engineering, the equipment record and real-time record work of hidden engineering can be formed under the condition of ensuring the construction inspection of the tower crane foundation, the verification data can be formed with the secondary inspection after the whole construction is completed, and the reliability of the tower crane foundation is further improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An embedded tower crane foundation construction method is characterized by comprising the following steps:
A. preparing before construction, determining soil quality data of geological survey data in a target site, determining lofting confirmation of a tower crane foundation in a foundation pit area, and manufacturing steel reinforcement cages of steel lattice columns and bored piles outside the site;
B. constructing a pile foundation, namely constructing a cast-in-situ bored pile before a foundation pit is not excavated, synchronously completing the installation and positioning of the steel lattice column, and then pouring concrete of the cast-in-situ bored pile;
C. and (3) tower crane installation and construction, namely, steel bar binding and hidden beam steel bar binding are carried out on the lower bottom surface of a concrete bearing platform, the concrete bearing platform is poured, then, the position of a tower crane is installed, excavation is carried out on the first layer of earthwork of the foundation pit, steel inclined rods and horizontal rods are welded on steel lattice columns in the height of the first layer of earthwork, and horizontal cross braces are arranged until the foundation pit is excavated to the required height.
2. The construction method of the buried tower crane foundation according to claim 1, wherein the total number of the steel lattice columns in the step B is five, the steel lattice columns are vertically arranged at four corners and the center of the steel lattice columns, and a reinforcement cage is further installed during the construction of the cast-in-situ bored pile.
3. The construction method of the buried tower crane foundation as claimed in claim 2, wherein cross beams are connected to the top ends of the steel lattice columns, the cross beams are hidden beams and located inside the bearing platform, the reinforcement cage and the steel lattice columns are in electric welding lap joint, the electric welding lap joint length is not less than 3 m, and the main reinforcement and the steel lattice columns are connected.
4. The construction method of the buried tower crane foundation according to claim 3, wherein steel cross braces are further installed between the steel lattice columns, the steel cross braces are arranged in a zigzag shape, the cross braces are spaced by 6-7 m, and groined connecting beams are further arranged at the top ends of the steel lattice columns.
5. The construction method of the embedded tower crane foundation according to claim 1, wherein in the step B, the concrete grade of the cast-in-place pile is not less than C20, the aggregate is not more than 30mm, the slump is 50-70 mm, and the concrete protection thickness of the cast-in-place pile is not less than 60-80 mm.
6. The construction method for the buried tower crane foundation according to claim 1, wherein the excavation in the step C is performed to a required height, that is, a reinforced concrete cushion layer is poured on the ground, and the concrete grade of the reinforced concrete cushion layer is not less than C15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110532115.5A CN113323010A (en) | 2021-05-17 | 2021-05-17 | Construction method of embedded tower crane foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110532115.5A CN113323010A (en) | 2021-05-17 | 2021-05-17 | Construction method of embedded tower crane foundation |
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| CN113323010A true CN113323010A (en) | 2021-08-31 |
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| CN202110532115.5A Pending CN113323010A (en) | 2021-05-17 | 2021-05-17 | Construction method of embedded tower crane foundation |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498482A (en) * | 2013-09-30 | 2014-01-08 | 上海建工七建集团有限公司 | Three-pile lattice type combined tower crane foundation structure |
| WO2014139252A1 (en) * | 2013-03-15 | 2014-09-18 | 中国十七冶集团有限公司 | Method for constructing large raft foundation in high-temperature environment |
| 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 |
| CN110700303A (en) * | 2019-10-12 | 2020-01-17 | 重庆建工建筑产业技术研究院有限公司 | Pile foundation profile steel combined tower crane foundation construction method |
-
2021
- 2021-05-17 CN CN202110532115.5A patent/CN113323010A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014139252A1 (en) * | 2013-03-15 | 2014-09-18 | 中国十七冶集团有限公司 | Method for constructing large raft foundation in high-temperature environment |
| CN103498482A (en) * | 2013-09-30 | 2014-01-08 | 上海建工七建集团有限公司 | Three-pile lattice type combined tower crane foundation structure |
| 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 |
| CN110700303A (en) * | 2019-10-12 | 2020-01-17 | 重庆建工建筑产业技术研究院有限公司 | Pile foundation profile steel combined tower crane foundation construction method |
Non-Patent Citations (1)
| Title |
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| 口永刚等: "钢格构柱式塔吊基础在深基坑中的应用", 《安徽建筑》 * |
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Application publication date: 20210831 |
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| RJ01 | Rejection of invention patent application after publication |