CN111042184A - Basement tower crane foundation construction method - Google Patents
Basement tower crane foundation construction method Download PDFInfo
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- CN111042184A CN111042184A CN202010002585.6A CN202010002585A CN111042184A CN 111042184 A CN111042184 A CN 111042184A CN 202010002585 A CN202010002585 A CN 202010002585A CN 111042184 A CN111042184 A CN 111042184A
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- tower crane
- foundation
- crane foundation
- basement
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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
- E02D27/32—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
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Foundations (AREA)
Abstract
The invention discloses a construction method of a basement tower crane foundation, and relates to the technical field of building construction. By adopting the invention, a better waterproof effect can be achieved on a construction joint formed by later-stage concrete pouring through the steel plate waterstop; in addition, the method can construct the tower crane foundation in the stage of excavating the bearing platform foundation, does not influence the construction of the basement raft structure, and greatly saves the construction period.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of a basement tower crane foundation.
Background
Along with the rapid development of city construction, large-scale city complex, high-rise and super high-rise buildings are more and more, large-scale ultra-deep basements are more and more, the construction period is more and more tight, the position arrangement of the tower crane foundation and the requirements of the construction method are reasonable, under the condition of good bearing capacity of the foundation, commercial parts with low floors at the upper part of the large-scale basements generally adopt pile-free foundations, the plane size of foundation bearing platforms is designed to be larger, the clear space between the edges of the adjacent bearing platforms is smaller than the size of the tower crane foundation, the construction joints reserved on the traditional large-scale ultra-deep basement tower crane foundation cannot be constructed firstly, and the waterproof effect of a raft plate of the basement foundation.
Disclosure of Invention
The invention aims to provide a basement tower crane foundation construction method for overcoming the defects in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: a construction method of a basement tower crane foundation is characterized by comprising the following steps:
(1) paying off and positioning and constructing a foundation bearing platform: firstly, measuring the position of a tower crane foundation arranged between pay-off foundation bearing platforms according to a tower crane positioning diagram and a plane arrangement diagram, carrying out pile foundation detection and structural treatment of a pile top and the foundation bearing platforms of a tubular pile, then, excavating the foundation bearing platforms and the tower crane foundation in sequence, excavating the earthwork of the tower crane foundation to the position below the bottom of the foundation bearing platforms until the construction design requirements are met, and finally, carrying out raft construction;
(2) constructing a tower crane foundation: pouring a tower crane foundation cushion layer, building a brick moulding bed, and binding tower crane foundation reinforcing steel bars;
(3) embedding an embedded part: and according to the accurate embedded parts of the tower crane specification, the lightning protection downlead is embedded together. The foundation template is firm, concrete is poured and molded at one time, the concrete is compacted by vibration, the concrete surface is leveled, and after the binding of the steel bars at the bottom of the foundation bearing platform is finished, the assembled fixed supporting legs and the pre-embedded supporting leg fixed foundation sections are integrally placed in a steel bar cage;
(4) installing a tower crane: the method comprises the steps of pre-burying a tower crane standard knot, pouring tower crane foundation concrete, filling plain concrete around a tower crane foundation, backfilling graded sandstone below the bottom of a foundation bearing platform, and pouring a concrete cushion.
Preferably, the step (1) further comprises that the foundation bearing platform earthwork excavation adopts a natural slope with a slope of 1: 1, and 2.0 high earthwork at the upper pit edge of the working surface is taken into consideration to adopt step excavation, so that the safety of the pit wall is ensured.
Preferably, the step (2) further comprises the steps of building a brick moulding bed of the tower crane foundation bearing platform by mortar bricks with the thickness of 370mm, plastering two sides of the brick moulding bed by 15-thick waterproof mortar, and enabling the brick moulding bed to be 500mm away from the bottom plate surface of the basement.
Preferably, the step (3) further includes that the lightning protection down conductor is reliably grounded by using a special grounding wire, and the grounding resistance is not greater than 4 Ω.
Preferably, the special grounding wire is formed by welding a grounding round steel with 12 round steels for the tower crane foundation steel bar and the pile foundation steel bar to form a grounding grid.
Preferably, the step (4) further comprises backfilling graded gravel to the bottom surface of the raft bedding layer at the gap above the tower crane foundation and compacting.
Preferably, the step (4) further comprises the steps of setting a steel plate water stop at the position where the tower crane extends into the raft when the foundation bearing platform and the raft are constructed, and constructing according to the post-cast strip method.
Compared with the prior art, the invention has the following beneficial effects: the method can construct the tower crane foundation in the stage of excavating the bearing platform foundation, does not influence the construction of the basement raft structure, and greatly saves the construction period.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic diagram of a reserved post-cast strip of the raft penetrating plate of the tower crane.
The tower crane comprises a foundation bearing platform 1, a tower crane foundation 2, a tower crane standard section 3, plain concrete 4, graded gravel 5, a concrete cushion 6, a raft, a steel plate water stop 8 and a tower crane standard section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, the construction method of the basement tower crane foundation of the embodiment is characterized by comprising the following steps:
(1) paying off and positioning and constructing a foundation bearing platform 1: firstly, measuring the position of a tower crane foundation 2 arranged between paying-off foundation bearing platforms 1 according to a tower crane positioning diagram and a plane arrangement diagram, carrying out pile foundation detection and structural treatment of a pile top of a tubular pile and the foundation bearing platforms 1, then, excavating the foundation bearing platforms 1 and the tower crane foundation 2 in sequence, excavating the earthwork of the tower crane foundation 2 to be below the bottom of the foundation bearing platforms 1 until the construction design requirements are met, and finally, constructing a raft 7;
(2) constructing a tower crane foundation 2: pouring a cushion layer of a tower crane foundation 2, building a brick moulding bed, and binding tower crane foundation reinforcing steel bars;
(3) embedding an embedded part: and according to the accurate embedded parts of the tower crane specification, the lightning protection downlead is embedded together. The foundation template is firm, concrete is poured and molded at one time, the concrete is compacted by vibration, the concrete surface is leveled, and after the binding of the steel bars at the bottom of the foundation bearing platform is finished, the assembled fixed supporting legs and the pre-embedded supporting leg fixed foundation sections are integrally placed in a steel bar cage;
(4) installing a tower crane: the method comprises the steps of pre-burying a tower crane standard knot, pouring concrete of a tower crane foundation 2, filling plain concrete 4 around the tower crane foundation 2, backfilling graded gravel 5 below the bottom of a foundation bearing platform 1, and pouring a concrete cushion 6.
Wherein: step (1) further includes that 1 earthwork excavation of basic cushion cap adopts nature to put the slope, and the slope is 1: 1, taking 2.0 high earthwork at the upper pit edge of the working surface into consideration, and adopting step excavation to ensure the safety of the pit wall; the step (2) further comprises the steps that a brick moulding bed of the tower crane foundation bearing platform 1 is built by mortar bricks with the thickness of 370mm, two sides of the brick moulding bed are coated by 15-thick waterproof mortar, and the brick moulding bed is 500mm away from the bottom plate surface of the basement; the step (3) further comprises that the lightning protection down lead is reliably grounded by using a special grounding wire, and the grounding resistance is not more than 4 omega; the special grounding wire is formed by welding a grounding round steel with a tower crane foundation 1 steel bar and a pile foundation steel bar by using 12 round steel to form a grounding net; the step (4) further comprises backfilling graded gravel to the bottom surface of the raft cushion layer at the gap above the tower crane foundation and compacting; step (4) further includes, when foundation cushion cap 1 and raft 7 are under construction, the position that the tower crane stretches into raft 7 sets up the steel sheet waterstop, and construct according to the way of post-cast strip, after tower crane upper portion according to first buttress, the post-cast strip of tower crane and raft 7 handing-over department is built again to guarantee that the stability of tower crane does not destroy raft 7 concrete structure.
In the embodiment, the steel plate waterstop can play a better waterproof effect on the construction joint formed by later-stage concrete pouring; in addition, the method can construct the tower crane foundation in the stage of excavating the bearing platform foundation, does not influence the construction of the basement raft structure, and greatly saves the construction period.
It is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover various insubstantial modifications of the inventive process concepts and solutions, or its application to other applications without modification.
Claims (7)
1. A construction method of a basement tower crane foundation is characterized by comprising the following steps:
(1) paying off and positioning and constructing a foundation bearing platform: firstly, measuring the position of a tower crane foundation arranged between pay-off foundation bearing platforms according to a tower crane positioning diagram and a plane arrangement diagram, carrying out pile foundation detection and structural treatment of a pile top and the foundation bearing platforms of a tubular pile, then, excavating the foundation bearing platforms and the tower crane foundation in sequence, excavating the earthwork of the tower crane foundation to the position below the bottom of the foundation bearing platforms until the construction design requirements are met, and finally, carrying out raft construction;
(2) constructing a tower crane foundation: pouring a tower crane foundation cushion layer, building a brick moulding bed, and binding tower crane foundation reinforcing steel bars;
(3) embedding an embedded part: and according to the accurate embedded parts of the tower crane specification, the lightning protection downlead is embedded together. The foundation template is firm, concrete is poured and molded at one time, the concrete is compacted by vibration, the concrete surface is leveled, and after the binding of the steel bars at the bottom of the foundation bearing platform is finished, the assembled fixed supporting legs and the pre-embedded supporting leg fixed foundation sections are integrally placed in a steel bar cage;
(4) installing a tower crane: the method comprises the steps of pre-burying a tower crane standard knot, pouring tower crane foundation concrete, filling plain concrete around a tower crane foundation, backfilling graded sandstone below the bottom of a foundation bearing platform, and pouring a concrete cushion.
2. The construction method of the basement tower crane foundation according to claim 1, characterized in that: step (1) further includes that foundation cushion cap earthwork excavation adopts natural slope, and the slope is 1: 1, and 2.0 high earthwork at the upper pit edge of the working surface is taken into consideration to adopt step excavation, so that the safety of the pit wall is ensured.
3. The construction method of the basement tower crane foundation according to claim 1, characterized in that: and the step (2) further comprises the steps of building a brick bed course of the tower crane foundation bearing platform by using lime sand bricks with the thickness of 370mm, plastering two sides of 15-thick waterproof mortar, and enabling the brick bed course to be 500mm away from the basement bottom plate surface.
4. The construction method of the basement tower crane foundation according to claim 1, characterized in that: and the step (3) further comprises the step of reliably grounding the lightning protection down lead by using a special grounding wire, wherein the grounding resistance is not more than 4 omega.
5. The construction method of the basement tower crane foundation according to claim 4, characterized in that: the special grounding wire is formed by welding a grounding round steel with 12 round steels for tower crane foundation steel bars and pile foundation steel bars to form a grounding grid.
6. The construction method of the basement tower crane foundation according to claim 1, characterized in that: and (4) further comprising backfilling graded gravel to the bottom surface of the raft cushion layer at the gap above the tower crane foundation and compacting.
7. The construction method of the basement tower crane foundation according to claim 1, characterized in that: and (4) further comprising the step of arranging a steel plate water stop at the position where the tower crane extends into the raft when constructing the foundation bearing platform and the raft, and constructing according to a post-cast strip method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010002585.6A CN111042184A (en) | 2020-01-02 | 2020-01-02 | Basement tower crane foundation construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010002585.6A CN111042184A (en) | 2020-01-02 | 2020-01-02 | Basement tower crane foundation construction method |
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| CN111042184A true CN111042184A (en) | 2020-04-21 |
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| CN202010002585.6A Pending CN111042184A (en) | 2020-01-02 | 2020-01-02 | Basement tower crane foundation construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115467359A (en) * | 2022-07-06 | 2022-12-13 | 中建八局第三建设有限公司 | Construction method of lower horizontal tower crane foundation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015219655A1 (en) * | 2015-10-09 | 2017-04-13 | Ventur GmbH | foundation base |
| CN109667278A (en) * | 2018-12-29 | 2019-04-23 | 山东开拓建设有限公司 | Tower crane anti-cracking and seepage control construction method is set under underground garage isolated footing |
| CN109930625A (en) * | 2019-04-16 | 2019-06-25 | 安徽同济建设集团有限责任公司 | A kind of tower crane and its construction method |
-
2020
- 2020-01-02 CN CN202010002585.6A patent/CN111042184A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015219655A1 (en) * | 2015-10-09 | 2017-04-13 | Ventur GmbH | foundation base |
| CN109667278A (en) * | 2018-12-29 | 2019-04-23 | 山东开拓建设有限公司 | Tower crane anti-cracking and seepage control construction method is set under underground garage isolated footing |
| CN109930625A (en) * | 2019-04-16 | 2019-06-25 | 安徽同济建设集团有限责任公司 | A kind of tower crane and its construction method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115467359A (en) * | 2022-07-06 | 2022-12-13 | 中建八局第三建设有限公司 | Construction method of lower horizontal tower crane foundation |
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Application publication date: 20200421 |
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