CN102561384A - Steel hoop truss type elevated pile cap tower crane foundation construction method and structure - Google Patents
Steel hoop truss type elevated pile cap tower crane foundation construction method and structure Download PDFInfo
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- CN102561384A CN102561384A CN2012100223848A CN201210022384A CN102561384A CN 102561384 A CN102561384 A CN 102561384A CN 2012100223848 A CN2012100223848 A CN 2012100223848A CN 201210022384 A CN201210022384 A CN 201210022384A CN 102561384 A CN102561384 A CN 102561384A
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Abstract
The invention discloses a steel hoop truss type elevated pile cap tower crane foundation construction method. The method comprises (1) constructing four cast-in-place concrete piles in a foundation pit before foundation pit earthwork excavation, the pile bottom elevation being below the foundation pit bottom elevation and the ratio of the length of the cast-in-place concrete pile below the foundation pit bottom face to the length of the cast-in-place concrete pile in the foundation pit being larger than or equal to 1.5; (2) pouring a reinforced concrete pile cap at the pile top and installing a tower crane on the pile cap; and (3) carrying out the foundation pit earthwork excavation, while forming a steel truss type hoop structure on the exposed sections of the four cast-in-place concrete piles in the foundation pit to connect them together. The invention also discloses a steel hoop truss type elevated pile cap tower crane foundation structure constructed by the method. The tower foundation adopting the invention has stable and firm structure, high safety, convenient construction, and low cost, and the steel components of the steel truss type hoop structure can be recycled.
Description
Technical field
The present invention relates to a kind of job practices and structure of tower crane, particularly relate to a kind of job practices and structure of steel hoop truss-like highrise pile cap tower crane.
Background technology
At present; The comparatively common a kind of mode of large-scale construction method of deep foundation ditch is: after the substrate absolute altitude is dug in the earthwork, carry out the construction of tower crane again, tower crane is in foundation pit supporting construction and the interim effect of having supported basic just performance of construction period not; Can't resolve the vertical transport problem; Strengthen difficulty of construction, prolonged the duration, increased the danger of foundation pit construction.Also have a kind of job practices to be, before soil excavation, four cast-in-place concrete piles of constructing earlier; Stake top mark height is located at below the tower crane base plate, treat that tower crane installs after, carry out soil excavation again; The castinplace pile that supports tower crane forms destabilizing factor, for addressing this problem along with the intensification of the soil excavation degree of depth will successively be exposed; Need between four cast-in-place concrete piles, to set up bridging, also need the vertical displacement of detection at any time pile body with the steel sleeve welding.Though this mode has solved the vertical transport problem in foundation pit construction stage, reduced the stability of tower crane, increase the unsafe hidden danger of construction, and strengthened the cost that tower crane is reinforced.The place is narrow and small at the scene, the foundation ditch floor space is comparatively common than the deep foundation pit construction that big and body of the tower are arranged in the foundation ditch centre for back a kind of method, helps improving to greatest extent the construction effect.
Summary of the invention
The present invention for solve the technical problem that exists in the known technology provide a kind of Stability Analysis of Structures, firmly, safety is higher and the job practices and the structure of easy construction, lower-cost steel hoop truss-like highrise pile cap tower crane.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of job practices of steel hoop truss-like highrise pile cap tower crane may further comprise the steps:
One) before the pit earthwork excavation; Elder generation is four cast-in-place concrete piles of construction in foundation ditch; A stake top mark high position is in ground surface, and a stake end absolute altitude is positioned at the bottom of the foundation ditch below the absolute altitude, and the length that cast-in-place concrete pile is squeezed into below the foundation ditch bottom surface is in the interior length ratio of foundation ditch more than or equal to 1.5 with it;
Two) build the steel concrete cushion cap four cast-in-place concrete pile stake top casting, tower crane is installed on cushion cap;
Three) the excavation pit earthwork; In the pit earthwork digging process; Earlier each affixed top steel hoop at the top of four cast-in-place concrete piles whenever down digs 2～3m then, each steel hoop in the middle of affixed one again on four cast-in-place concrete piles; Connection along with middle steel hoop; Order is being provided with several vertical truss steel supports between neighbouring top steel hoop and the middle steel hoop and between the neighbouring middle steel hoop, the intersection of supporting at two vertical truss steel is provided with the shared connection steel plate of vertical truss, and the end that vertical truss steel supports connects with corresponding steel hoop through vertical truss connection steel plate; Several horizontal truss steel are set between the high middle steel hoop support waiting, the intersection of supporting at two horizontal truss steel is provided with the shared connection steel plate of horizontal truss, and the end that horizontal truss steel supports connects steel plate through horizontal truss and connects with corresponding steel hoop.
In said step 2) construction before; Excavation 2～3m earthwork downwards earlier; And first each affixed top steel hoop at the top of four cast-in-place concrete piles; In the bottom, hole; On four cast-in-place concrete piles each affixed one with the neighbouring middle steel hoop of top steel hoop 3; The top steel hoop and and its neighbouring middle steel hoop between several vertical truss steel be set support; The intersection of supporting at two vertical truss steel is provided with the shared connection steel plate of vertical truss, and the end that vertical truss steel supports connects steel plate by vertical truss and connects with corresponding steel hoop; And the middle steel hoop of the neighbouring height such as grade of top steel hoop between several horizontal truss steel be set support; Be provided with shared horizontal truss in the intersection that two horizontal truss steel support and connect steel plate, the end that horizontal truss steel supports connects steel plate by horizontal truss and connects with corresponding steel hoop.
Grouting material or structure glue are tamped through the method for high-pressure slip-casting in slit between slit between said top steel hoop and the said cast-in-place concrete pile and said middle steel hoop and the said cast-in-place concrete pile.
Another technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: the structure that adopts the steel hoop truss-like highrise pile cap tower crane of said method construction; Comprise four cast-in-place concrete piles that are arranged in the foundation ditch; A stake top mark high position is in ground surface, and every cast-in-place concrete pile is positioned at the fixed section length below the foundation ditch bottom surface is in foundation ditch with it revealed section length ratio more than or equal to 1.5; The steel concrete cushion cap has been built in four cast-in-place concrete pile stake top casting; Four cast-in-place concrete piles are on the revealed section in the foundation ditch and are formed with the steel truss formula anchor ear structure that they are linked together, and said steel truss formula anchor ear structure comprises the N group steel hoop that is fixed at interval on the cast-in-place concrete pile, and the height of every group of steel hoop equates; Said N group steel hoop is followed successively by top steel hoop group and N-1 middle steel hoop group from top to bottom; Be provided with several horizontal truss steel between the high middle steel hoop and support waiting in groups; The intersection of supporting at two horizontal truss steel is provided with the shared connection steel plate of horizontal truss, and the end that horizontal truss steel supports connects steel plate through horizontal truss and connects with corresponding steel hoop; Several vertical truss steel supports are being set between neighbouring top steel hoop and the middle steel hoop and between the neighbouring middle steel hoop; The intersection of supporting at two vertical truss steel is provided with the shared connection steel plate of vertical truss, and the end that vertical truss steel supports connects steel plate through vertical truss and connects with corresponding steel hoop; Wherein N is the natural number more than or equal to 3.
Grouting material or structure glue have been tamped in the slit between said top steel hoop and the said cast-in-place concrete pile and in the slit between said middle steel hoop and the said cast-in-place concrete pile.
Advantage and good effect that the present invention has are: through adopt cast-in-place concrete pile be mounted in below the foundation ditch bottom surface length be exposed at length ratio in the foundation ditch outward more than or equal to 1.5 structure; And the steel truss formula anchor ear structure that formation links together them between four cast-in-place concrete piles; Make tower crane Stability Analysis of Structures of the present invention, firmly, safety is higher; And with respect to other highrise pile cap easy constructions, cost is lower, forms the recyclable utilization of steel member of steel truss formula anchor ear structure; On the cost, comparatively economical.Also have, applicability of the present invention is stronger, does not receive site condition, geological hydrology condition restriction.The present invention has solved in the foundation pit construction process the omnidistance tower crane that uses preferably and has carried out vertical transport; The difficult problem of tower crane poor stability; Engineering piles do not construct or pit earthwork excavation before just can make and shift to an earlier date mounted tower crane and effectively turn round, during foundation pit construction with tower crane as vertical transport equipment, convenient and quick construction, effectively shortened the groove time of drying in the air; Improved the operating efficiency of foundation pit construction; Can shorten the foundation pit construction duration in a large number, reduce to take place the coefficient of security incident, for the smooth construction of superstructure provides advantage because of claim for eot.
Description of drawings
Fig. 1 is the elevation of tower crane structure of the present invention;
Fig. 2 is the plan view of horizontal steel truss formula anchor ear structure in the tower crane structure of the present invention.
Among the figure: 1, tower crane standard knot or stone bolt, 2, cushion cap, 3, the top steel hoop, 4, revealed section; 5, middle steel hoop, 6, fixed section, 7, vertical truss steel supports; 8, horizontal truss steel supports, and 9, the shared connection steel plate of horizontal truss, 10, grouting material or structure glue; 11, horizontal truss connects steel plate, and 12, the vertical shared connection steel plate of truss, 13, vertical truss connects steel plate.
The specific embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, the following examples of giving an example now, and conjunction with figs. specifies as follows:
See also Fig. 1～Fig. 2; A kind of steel hoop truss-like highrise pile cap tower crane structure; Comprise four cast-in-place concrete piles that are arranged in the foundation ditch; A stake top mark high position is in ground surface, and the length that every cast-in-place concrete pile is positioned at the fixed section 6 below the foundation ditch bottom surface is in the length ratio of revealed section 4 of foundation ditch more than or equal to 1.5 with it; Steel concrete cushion cap 2 has been built in four cast-in-place concrete pile stake top casting; Four cast-in-place concrete piles are on the revealed section in the foundation ditch and are formed with the steel truss formula anchor ear structure that they are linked together; Said steel truss formula anchor ear structure comprises between the upper and lower organizes steel hoop at a distance from the N that is fixed on the cast-in-place concrete pile, and the height of every group of steel hoop equates; Said N group steel hoop is followed successively by top steel hoop group and N-1 middle steel hoop group from top to bottom; Be provided with several horizontal truss steel between the high middle steel hoop 5 and support 8 waiting in groups; Intersection two horizontal truss steel supports 8 is provided with the shared connection steel plate 9 of horizontal truss, and the end of horizontal truss steel support 8 connects steel plate 11 through horizontal truss and connects with corresponding steel hoop; Several vertical truss steel supports 7 are being set between neighbouring top steel hoop 3 and the middle steel hoop 5 and between the neighbouring middle steel hoop 5; Intersection two vertical truss steel supports 7 is provided with the shared connection steel plate 12 of vertical truss, and the end of vertical truss steel support 7 connects steel plate 13 through vertical truss and connects with corresponding steel hoop; Wherein N is the natural number more than or equal to 3.Grouting material or structure glue 10 have been tamped in the slit between said top steel hoop 3 and the said cast-in-place concrete pile and in the slit between said middle steel hoop 5 and the said cast-in-place concrete pile.
The job practices of above-mentioned tower crane may further comprise the steps:
One) before the pit earthwork excavation; Elder generation is four cast-in-place concrete piles of construction in foundation ditch; A stake top mark high position is in ground surface; Stake end absolute altitude is positioned at the bottom of the foundation ditch below the absolute altitude, and cast-in-place concrete pile is squeezed into the length of the fixed section 6 below the foundation ditch bottom surface is in the interior revealed section 4 of foundation ditch with it length ratio more than or equal to 1.5;
Two) build steel concrete cushion cap 2 four cast-in-place concrete pile stake top casting, pre-buried tower crane standard knot or stone bolt 1 in cushion cap 2, and the installation of completion tower crane;
Three) the excavation pit earthwork; In the pit earthwork digging process; Earlier each affixed top steel hoop 3 at the top of four cast-in-place concrete piles whenever down digs 2～3m then, each steel hoop 5 in the middle of affixed one again on four cast-in-place concrete piles; Connection along with middle steel hoop 5; Order is provided with the shared connection steel plate 12 of vertical truss in that several vertical truss steel supports 7 are being set between neighbouring top steel hoop 3 and the middle steel hoop 5 and between the neighbouring middle steel hoop 5 in the intersection of two vertical truss steel supports 7, and the end of vertical truss steel support 7 connects with corresponding steel hoop through vertical truss connection steel plate 13; Several horizontal truss steel are set between the high middle steel hoop 5 support 8 waiting; Intersection two horizontal truss steel supports 8 is provided with the shared connection steel plate 9 of horizontal truss, and the end of horizontal truss steel support 8 connects steel plate 11 through horizontal truss and connects with corresponding steel hoop.Steel hoop 5 can be accomplished after cushion cap 2 completions from top to bottom successively in the middle of on the revealed section 4 all; Also can be before cushion cap 2 constructions; Excavation 2～3m earthwork downwards earlier; And first each affixed top steel hoop 3 at the top of four cast-in-place concrete piles; In the bottom, hole, on four cast-in-place concrete piles each affixed one with neighbouring middle the steel hoop 5 of top steel hoop 3, top steel hoop 3 and and its neighbouring middle steel hoop 5 between several vertical truss steel supports 7 are set; Intersection two vertical truss steel supports 7 is provided with the shared connection steel plate 12 of vertical truss, and the end of vertical truss steel support 7 connects steel plate 13 through vertical truss and connects with corresponding steel hoop; And the middle steel hoop of the neighbouring height such as grade of top steel hoop between several horizontal truss steel be set support 8; Be provided with shared horizontal truss in the intersection of two horizontal truss steel supports 8 and connect steel plate 9, the end of horizontal truss steel support 8 connects steel plate 11 through horizontal truss and connects with corresponding steel hoop.
To be connected more solid and reliablely in order making between steel hoop and the cast-in-place concrete pile, to tamp to be in the milk through the method for high-pressure slip-casting in the slit in the slit between said top steel hoop 3 and the said cast-in-place concrete pile and in the middle of said between steel hoop 5 and the said cast-in-place concrete pile and expect or structure glue 10.
Although combine accompanying drawing that the preferred embodiments of the present invention are described above; But the present invention is not limited to the above-mentioned specific embodiment, and the above-mentioned specific embodiment only is schematically, is not restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (5)
1. the job practices of a steel hoop truss-like highrise pile cap tower crane is characterized in that, may further comprise the steps:
One) before the pit earthwork excavation; Elder generation is four cast-in-place concrete piles of construction in foundation ditch; A stake top mark high position is in ground surface; Stake end absolute altitude is positioned at the bottom of the foundation ditch below the absolute altitude, and cast-in-place concrete pile is squeezed into the length of the fixed section below the foundation ditch bottom surface is in the interior revealed section of foundation ditch with it length ratio more than or equal to 1.5;
Two) build the steel concrete cushion cap four cast-in-place concrete pile stake top casting, tower crane is installed on cushion cap;
Three) the excavation pit earthwork; In the pit earthwork digging process; Earlier each affixed top steel hoop at the top of four cast-in-place concrete piles whenever down digs 2～3m then, each steel hoop in the middle of affixed one again on four cast-in-place concrete piles; Connection along with middle steel hoop; Order is being provided with several vertical truss steel supports between neighbouring top steel hoop and the middle steel hoop and between the neighbouring middle steel hoop, the intersection of supporting at two vertical truss steel is provided with the shared connection steel plate of vertical truss, and the end that vertical truss steel supports connects with corresponding steel hoop through vertical truss connection steel plate; Several horizontal truss steel are set between the high middle steel hoop support waiting, the intersection of supporting at two horizontal truss steel is provided with the shared connection steel plate of horizontal truss, and the end that horizontal truss steel supports connects steel plate through horizontal truss and connects with corresponding steel hoop.
2. the job practices of steel hoop truss-like highrise pile cap tower crane according to claim 1; It is characterized in that; In said step 2) construction before; Excavation 2～3m earthwork downwards, and elder generation earlier is each affixed top steel hoop at the top of four cast-in-place concrete piles, in the bottom, hole; On four cast-in-place concrete piles each affixed one with the neighbouring middle steel hoop of top steel hoop 3; The top steel hoop and and its neighbouring middle steel hoop between several vertical truss steel be set support, the intersection of supporting at two vertical truss steel is provided with the shared connection steel plate of vertical truss, the end that vertical truss steel supports connects steel plate through vertical truss and connects with corresponding steel hoop; And the middle steel hoop of the neighbouring height such as grade of top steel hoop between several horizontal truss steel be set support; Be provided with shared horizontal truss in the intersection that two horizontal truss steel support and connect steel plate, the end that horizontal truss steel supports connects steel plate through horizontal truss and connects with corresponding steel hoop.
3. the job practices of steel hoop truss-like highrise pile cap tower crane according to claim 1 and 2; It is characterized in that grouting material or structure glue are tamped through the method for high-pressure slip-casting in the slit between the slit between said top steel hoop and the said cast-in-place concrete pile and said middle steel hoop and the said cast-in-place concrete pile.
4. adopt the structure of the steel hoop truss-like highrise pile cap tower crane of the method for claim 1 construction; It is characterized in that; Comprise four cast-in-place concrete piles that are arranged in the foundation ditch; A stake top mark high position is in ground surface, and every cast-in-place concrete pile is positioned at the fixed section length below the foundation ditch bottom surface is in foundation ditch with it revealed section length ratio more than or equal to 1.5; The steel concrete cushion cap has been built in four cast-in-place concrete pile stake top casting; Four cast-in-place concrete piles are on the revealed section in the foundation ditch and are formed with the steel truss formula anchor ear structure that they are linked together; Said steel truss formula anchor ear structure comprises between the upper and lower organizes steel hoop at a distance from the N that is fixed on the cast-in-place concrete pile, and the height of every group of steel hoop equates;
Said N group steel hoop is followed successively by top steel hoop group and N-1 middle steel hoop group from top to bottom; Be provided with several horizontal truss steel between the high middle steel hoop and support waiting in groups; The intersection of supporting at two horizontal truss steel is provided with the shared connection steel plate of horizontal truss, and the end that horizontal truss steel supports connects steel plate through horizontal truss and connects with corresponding steel hoop;
Several vertical truss steel supports are being set between neighbouring top steel hoop and the middle steel hoop and between the neighbouring middle steel hoop; The intersection of supporting at two vertical truss steel is provided with the shared connection steel plate of vertical truss, and the end that vertical truss steel supports connects steel plate through vertical truss and connects with corresponding steel hoop;
Wherein N is the natural number more than or equal to 3.
5. steel hoop truss-like highrise pile cap tower crane structure according to claim 4; It is characterized in that, tamped grouting material or structure glue in the slit between said top steel hoop and the said cast-in-place concrete pile and in the slit between said middle steel hoop and the said cast-in-place concrete pile.
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| CN2012100223848A CN102561384A (en) | 2012-01-31 | 2012-01-31 | Steel hoop truss type elevated pile cap tower crane foundation construction method and structure |
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Cited By (8)
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| CN103967040A (en) * | 2014-05-19 | 2014-08-06 | 中国建筑第八工程局有限公司 | Tower crane foundation structure and construction method thereof |
| CN104213560A (en) * | 2014-09-23 | 2014-12-17 | 国家电网公司 | Perpendicularity regulating method for foundation cast-in-place pile steel bar cage of power transmission iron tower |
| CN105544312A (en) * | 2016-01-29 | 2016-05-04 | 天津大学 | Reinforced concrete pile-plain concrete pile partitioned combined composite foundation |
| CN107558607A (en) * | 2017-09-20 | 2018-01-09 | 中国建筑第八工程局有限公司 | Tower crane system and its construction method on existing concrete structure |
| CN108277817A (en) * | 2018-01-02 | 2018-07-13 | 中国建筑第八工程局有限公司 | High Pile Cap for Tower Crane Foundation ruggedized construction and its construction method |
| CN111379578A (en) * | 2020-03-13 | 2020-07-07 | 叶小雳 | High-stress combined ring body beam supporting structure and construction method thereof |
| CN113431078A (en) * | 2021-07-20 | 2021-09-24 | 北京市第三建筑工程有限公司 | Tower crane foundation structure for transferring force to existing column and construction method thereof |
| CN114232702A (en) * | 2021-12-06 | 2022-03-25 | 天津市政工程设计研究总院有限公司 | Steel pipe pile combined reinforcement method and reinforcement structure |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103967040A (en) * | 2014-05-19 | 2014-08-06 | 中国建筑第八工程局有限公司 | Tower crane foundation structure and construction method thereof |
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| CN108277817A (en) * | 2018-01-02 | 2018-07-13 | 中国建筑第八工程局有限公司 | High Pile Cap for Tower Crane Foundation ruggedized construction and its construction method |
| CN111379578A (en) * | 2020-03-13 | 2020-07-07 | 叶小雳 | High-stress combined ring body beam supporting structure and construction method thereof |
| CN111379578B (en) * | 2020-03-13 | 2021-08-27 | 广东恒普建设工程有限公司 | High-stress combined ring body beam supporting structure and construction method thereof |
| CN113431078A (en) * | 2021-07-20 | 2021-09-24 | 北京市第三建筑工程有限公司 | Tower crane foundation structure for transferring force to existing column and construction method thereof |
| CN114232702A (en) * | 2021-12-06 | 2022-03-25 | 天津市政工程设计研究总院有限公司 | Steel pipe pile combined reinforcement method and reinforcement structure |
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Application publication date: 20120711 |