CN110725322A - Foundation pit slope tower crane construction method - Google Patents
Foundation pit slope tower crane construction method Download PDFInfo
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- CN110725322A CN110725322A CN201911035037.7A CN201911035037A CN110725322A CN 110725322 A CN110725322 A CN 110725322A CN 201911035037 A CN201911035037 A CN 201911035037A CN 110725322 A CN110725322 A CN 110725322A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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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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Abstract
The invention provides a foundation pit side slope tower crane construction method, which relates to the technical field of building construction and comprises the following steps: positioning and paying off; constructing a tower crane pile foundation: constructing a support pile and a tower crane pile foundation at the same time on the foundation pit side slope, and connecting an oblique anchor rod to the tower crane pile foundation; constructing a tower crane bearing platform: the tower crane bearing platform comprises a steel bar structure, a reserved part is preset on a top beam at the top of the supporting pile, and the steel bar structure is connected with transverse connecting steel bars and vertical connecting steel bars of the reserved part; installing a tower crane foundation section: welding the tower crane foundation section to a steel bar structure; pouring a steel bar structure and a reserved part: integrally pouring and molding the tower crane bearing platform and the reserved part of the crown beam by using concrete, and watering and maintaining the tower crane bearing platform and the reserved part for a preset time; a tower crane is installed on a tower crane foundation section to complete the construction of the foundation pit slope tower crane, and the problems that the tower crane is far away from a foundation pit, so that the tower crane is attached to a wall too long and is inconvenient to install and dismantle in the foundation pit slope tower crane construction method in the prior art are solved.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly provides a construction method of a foundation pit side slope tower crane.
Background
Along with the rapid development of the urbanization in China, the urban land is increasingly tense, the development cost is relatively high in the busy sections of the city, and the developed floors are basically high-rise buildings with foundation pits. Due to the existence of the deep foundation pit, the design of the tower crane foundation is particularly important.
The pile of hole limit is carried generally to require lessly, so current construction unit usually beats the tower crane foundation pile outside foundation ditch side slope, then installs the tower crane on tower crane foundation pile. However, when the tower crane is arranged outside the foundation pit side slope, the tower crane is usually far away from the building construction site, and the problems that the tower crane is too long to be attached to a wall and inconvenient to install and dismantle can occur.
Accordingly, there is a need in the art for a foundation pit slope tower crane construction method to solve the above problems.
Disclosure of Invention
The invention provides a foundation pit side slope tower crane construction method, which solves the problems that a tower crane is far away from a foundation pit, so that a tower crane attached wall is too long and the installation and the removal are inconvenient in the foundation pit side slope tower crane construction method in the prior art.
The technical scheme of the invention is realized as follows: be provided with a fender pile on the foundation ditch side slope, the tower crane includes tower crane pile foundation, tower crane cushion cap, tower crane foundation festival and tower crane, and foundation ditch side slope tower crane construction method includes following step: positioning and paying off: marking the position of the tower crane pile foundation on the foundation pit slope according to a positioning diagram; constructing the tower crane pile foundation: constructing the support pile on the foundation pit side slope, constructing the tower crane pile foundation on one side of the support pile, which is far away from the foundation pit, constructing an oblique anchor rod in the foundation pit side slope towards one side of the tower crane pile foundation, which is far away from the foundation pit, wherein one end of the oblique anchor rod is connected with the tower crane pile foundation; constructing the tower crane bearing platform: the tower crane bearing platform comprises a steel bar structure, a crown beam is arranged at the top of the supporting pile, a reserved part is preset at the position of the crown beam corresponding to the tower crane bearing platform, a transverse connecting steel bar and a part of vertical connecting steel bars at the top of the supporting pile are reserved in the reserved part, and the steel bar structure, the transverse connecting steel bars and the vertical connecting steel bars are connected; installing the tower crane foundation section: welding the tower crane foundation section to the steel bar structure; pouring the steel bar structure and the reserved part: integrally pouring and molding the tower crane bearing platform and the reserved part of the crown beam by using concrete, and watering and maintaining the tower crane bearing platform and the reserved part for a preset time; and installing the tower crane on the tower crane foundation section to finish the construction of the foundation pit slope tower crane.
The technical effect of the scheme is as follows: the tower crane pile foundation and the support pile are constructed simultaneously, so that the construction time is shortened, and the construction efficiency is improved; the tower crane pile foundation is arranged on one side, away from the foundation pit, of the support pile, the steel bars of the tower crane bearing platform and the steel bars of the crown beam at the top of the support pile are connected and integrally poured, and the support pile and the tower crane pile foundation are jointly used as a vertical support system of the tower crane bearing platform, so that the stability of the tower crane bearing platform is improved; arranging an oblique anchor rod on one side, deviating from the foundation pit, in the side slope of the foundation pit, connecting one end of the oblique anchor rod with the tower crane pile foundation, and reinforcing the tower crane pile foundation by the arrangement of the oblique anchor rod to prevent the tower crane pile foundation from moving laterally; on the basis of guaranteeing foundation ditch side slope and tower crane cushion cap steadiness, set up the tower crane on the foundation ditch side slope, make the tower crane nearer apart from the building construction ground, make things convenient for the installation and the dismantlement of tower crane.
In the preferred technical scheme of above-mentioned foundation ditch side slope tower crane construction method, one side that the fender pile deviates from the foundation ditch is provided with many tower crane pile foundations, is close to the tower crane pile foundation of fender pile deviates from one side of foundation ditch is provided with many the slant stock, many the slant stock distributes along vertical direction, each the one end of slant stock with be close to the tower crane pile foundation of fender pile is connected.
The technical effect of the scheme is as follows: the tower crane bearing platform and the tops of the tower crane pile foundations are poured together to form an integral structure, the tower crane pile foundations close to the support pile are connected with the oblique anchor rods, namely the tower crane pile foundations on the outermost side are connected with the oblique anchor rods, and the oblique anchor rods are pulled towards the side slope of the foundation pit, so that the tower crane pile foundations can be prevented from moving towards the side of the foundation pit integrally, and the support pile can be prevented from being influenced after the tower crane pile foundations on the outermost side move laterally; each slant stock distributes along vertical direction, further consolidates the tower crane pile foundation, has improved tower crane cushion cap stability.
In the preferable technical scheme of the foundation pit slope tower crane construction method, one end of the oblique anchor rod, which is far away from the tower crane pile foundation, is provided with an expanded anchoring section.
The technical effect of the scheme is as follows: the slant stock sets up and enlarges the anchor section, has strengthened the anchoring power of slant stock, has further prevented that the tower crane pile foundation from taking place lateral shifting.
In the preferable technical scheme of the foundation pit side slope tower crane construction method, three grouting sections are arranged on the pile side of the tower crane pile foundation and are respectively provided with a grouting valve, each grouting valve is correspondingly provided with a grouting spray pipe, and the pile bottom of the tower crane pile foundation is provided with two grouting spray pipes.
The technical effect of the scheme is as follows: the tower crane pile foundation adopts a compound post-grouting reinforcement technology, mud liquid is combined with soil around a pile body of the tower crane pile foundation through the functions of infiltration, splitting, filling, compaction and the like, and the sediment at the bottom of the pile and the mud skin at the side of the pile are solidified, so that the bearing capacity of the tower crane pile foundation is improved, the settlement is reduced and the like.
In the preferable technical scheme of the foundation pit slope tower crane construction method, before the step of constructing the tower crane bearing platform, the foundation pit slope tower crane construction method further comprises the following steps: excavating earthwork, breaking pile heads and clearing grooves: according to the size and the elevation excavation earthwork of tower crane cushion cap break pile head more than the pile top of tower crane pile foundation, clearance construction waste soil waste material and the tower crane foundation ditch tamp that will excavate.
The technical effect of the scheme is as follows: provide reasonable and level and smooth construction face for follow-up construction tower crane cushion cap, with the steel bar connection at steel bar structure and tower crane pile foundation top when also making things convenient for follow-up ligature steel bar structure.
In the preferable technical scheme of the foundation pit slope tower crane construction method, the step of constructing the tower crane bearing platform specifically comprises the following steps: constructing a cushion layer and a brick moulding bed: constructing a concrete cushion layer in the tower crane foundation pit, wherein the thickness of the cushion layer is not less than 100mm, constructing a side wall brick molding bed of the tower crane bearing platform after the construction of the cushion layer is finished, constructing the side wall brick molding bed by adopting red bricks with the thickness of 240mm and M7.5 cement mortar, smearing the cement mortar with the thickness of 20mm at the inner side of the brick molding bed by adopting the ratio of 1:2.5, enabling the inner clearance size of the brick molding bed to be equal to the size of the tower crane bearing platform, widening the cushion layer by 100mm from the outer side edge of the brick molding bed, and backfilling and tamping soil in the outer side gap of the brick molding bed; manufacturing the steel bar structure: erecting a formwork in the brick mould and binding reinforcing steel bars to form a reinforcing steel bar structure, uniformly placing mortar cushion blocks under bottom reinforcing steel bars of the reinforcing steel bar structure, arranging transverse reinforcing ribs at the joints of the reinforcing steel bar structure and the reserved parts of the crown beams, and connecting the reinforcing steel bar structure, the reserved parts of the crown beams and the transverse reinforcing ribs; manufacturing a lightning protection grounding structure: inserting a ground member at least 1500mm below ground, connecting the tower crane foundation section and the ground member with an insulated copper cable having a cross-sectional area not less than 16 mm.
The technical effect of the scheme is as follows: the arrangement of the cushion layer ensures the elevation of the bottom surface of the tower crane bearing platform, and the brick moulding bed is constructed on the cushion layer, so that the brick moulding bed can be prevented from toppling over; the arrangement of the brick molding bed ensures the size of the tower crane bearing platform, the subsequent pouring is convenient, cement mortar is smeared on the inner side of the brick molding bed, on one hand, the strength of the brick molding bed can be enhanced, on the other hand, the waterproof effect can be achieved, the gap on the outer side of the brick molding bed is backfilled and tamped, and the stability of the tower crane bearing platform is enhanced; and a transverse reinforcing rib is arranged at the joint of the reserved part of the steel bar structure and the crown beam to further reinforce the tower crane bearing platform.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a foundation pit slope tower crane construction method of the invention;
FIG. 2 is a schematic diagram of a foundation pit slope tower crane of the invention;
FIG. 3 is a top view of the foundation pit slope tower crane of the invention.
List of reference numerals: 1. supporting piles; 12. a crown beam; 121. a reserved portion; 2. tower crane pile foundation; 3. a tower crane bearing platform; 31. a cushion layer; 4. tower crane foundation sections; 5. an oblique anchor rod; 51. expanding the anchoring section; 6. and transverse reinforcing ribs.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The concrete embodiment of the foundation pit slope tower crane construction method of the invention is as follows: be provided with fender pile 1 on the foundation ditch side slope, the tower crane includes tower crane pile foundation 2, tower crane cushion cap 3, tower crane foundation festival 4 and tower crane (not shown in the figure), and foundation ditch side slope tower crane construction method includes following step:
positioning and paying off: marking the point position of a tower crane pile foundation 2 on the foundation pit side slope according to the positioning diagram;
constructing a tower crane pile foundation: constructing a support pile 1 on a foundation pit side slope, constructing a tower crane pile foundation 2 on one side of the support pile 1, which is far away from the foundation pit, constructing an oblique anchor rod 5 in the foundation pit side slope towards one side of the tower crane pile foundation 2, which is far away from the foundation pit, and connecting one end of the oblique anchor rod 5 with the tower crane pile foundation 2;
constructing a tower crane bearing platform: the tower crane bearing platform 3 comprises a steel bar structure (not shown in the figure), the top of the supporting pile 1 is provided with a crown beam 12, a reserved part 121 is preset at the position of the crown beam 12 corresponding to the tower crane bearing platform 3, the reserved part 121 is reserved with transverse connecting steel bars and part of vertical connecting steel bars at the top of the supporting pile 1, and the connecting steel bar structure, the transverse connecting steel bars and the vertical connecting steel bars are connected;
installing a tower crane foundation section: welding the tower crane foundation section 4 to a steel bar structure;
pouring a steel bar structure and a reserved part: using concrete to integrally cast and form the tower crane bearing platform 3 and the reserved part 121 of the crown beam 12, and watering and maintaining the tower crane bearing platform 3 and the reserved part 121 for a preset time;
and (4) installing a tower crane on the tower crane foundation section to complete the construction of the foundation pit slope tower crane.
The tower crane pile foundation 2 and the support pile 1 are constructed simultaneously, so that the construction time is shortened, and the construction efficiency is improved; arranging the tower crane pile foundation 2 on one side of the support pile 1, which is far away from the foundation pit, connecting and integrally casting the steel bars of the tower crane bearing platform 3 and the steel bars of the crown beam 12 at the top of the support pile 1, wherein the support pile 1 and the tower crane pile foundation 2 are jointly used as a vertical support system of the tower crane bearing platform 3, so that the stability of the tower crane bearing platform 3 is improved; one side that deviates from the foundation ditch in the foundation ditch side slope sets up slant stock 5, is connected the one end of slant stock 5 with tower crane pile foundation 2, and the setting of slant stock 5 has consolidated tower crane pile foundation 2, prevents that tower crane pile foundation 2 from taking place the removal of lateral direction.
As an preferred embodiment, one side that fender pile 1 deviates from the foundation ditch is provided with three tower crane pile foundations 2, three tower crane pile foundations 2 are the triangular prism form and set up in the foundation ditch side slope, the line at the center of the tower crane pile foundation 2 that is close to fender pile 1 and the center of fender pile 1 is perpendicular with many fender pile 1 place planes, one side that the tower crane pile foundation 2 that is close to fender pile 1 deviates from the foundation ditch is provided with three slant stock 5, three slant stock 5 distribute along vertical direction, the one end of each slant stock 5 is connected with the tower crane pile foundation 2 that is close to fender pile 1. The tower crane foundation section 4 is arranged above the tower crane pile foundation 2 close to the support pile 1.
The tower crane bearing platform 3 and the tops of the three tower crane pile foundations 2 are poured together to form an integral structure, the oblique anchor rods 5 are connected to the tower crane pile foundations 2 close to the support piles 1, namely the oblique anchor rods 5 are connected to the tower crane pile foundations 2 on the outermost side, the oblique anchor rods 5 are pulled towards the side slope of the foundation pit, so that the tower crane pile foundations 2 can be prevented from moving towards the side of the foundation pit integrally, a connecting line between the centers of the tower crane pile foundations 2 close to the support piles 1 and the centers of the support piles 1 is perpendicular to the plane where the plurality of support piles 1 are located, and the support piles 1 can be prevented from being influenced after the tower crane pile foundations 2 on the outermost side move laterally; each slant stock 5 further consolidates tower crane pile foundation 2 along vertical direction distribution, has improved 3 stability of tower crane cushion cap.
It can be understood that setting up three tower crane pile foundations 2 on one side of fender pile 1 that deviates from the foundation ditch is only an embodiment, can also be according to the reasonable figure that sets up tower crane pile foundation 2 of the model of tower crane.
As a preferred embodiment, one end of the oblique anchor rod 5 away from the tower crane pile foundation 2 is provided with an enlarged anchoring section 51. The slant stock 5 sets up and enlarges anchor section 51, has strengthened the anchoring power of slant stock 5, has further prevented that tower crane pile foundation 2 from taking place lateral shifting.
As a preferred embodiment, in order to meet the requirement of bearing deformation of the pile foundation, the tower crane pile foundation 2 adopts a compound post-grouting reinforcement technology. Pile side slip casting of tower crane pile foundation 2 sets up three slip casting sections, and the position of laying of side slip casting valve is: the lowest one is 7.5m above the bottom of the pile, the uppermost one is 7.5m below the top of the pile, and one is arranged in the middle of the pile body. Each grouting valve corresponds to one grouting spray pipe, the grouting spray pipes are DN25 seamless steel pipes with the thickness of 3mm, and waterproof plastic tapes are wound for sealing after holes are punched on the outer sides of the grouting spray head pipes (the hole pitch is 10 cm). The pile bottom rear grouting pipe is provided with two channels, 2 seamless steel pipes with the thickness of 3mm DN25 are selected as the grouting pipes, and the bottom ends of the grouting pipes are tightly sealed by adhesive tapes after being drilled. Wherein the total dosage of the grouting cement is not less than 6.5 t. The tower crane pile foundation 2 adopts a compound post-grouting reinforcement technology, mud liquid is combined with soil around the pile body of the tower crane pile foundation 2 through the functions of infiltration, splitting, filling, compaction and the like, and the sediment at the bottom of the pile and the mud skin at the side of the pile are solidified, so that the bearing capacity of the tower crane pile foundation 2 is improved, the settlement is reduced and the like.
After the step of constructing the tower crane pile foundation and before the step of constructing the tower crane bearing platform, the foundation pit slope tower crane construction method further comprises the following steps:
excavating earthwork, breaking pile heads and clearing grooves: excavating earthwork according to the size and elevation of the tower crane bearing platform 3, breaking pile heads above the pile top of the tower crane pile foundation 2, clearing construction waste soil and waste materials and tamping an excavated tower crane foundation pit. Provide reasonable and level and smooth construction face for follow-up construction tower crane cushion cap 3, with the steel bar connection at steel bar structure and tower crane pile foundation 2 top during also convenient follow-up ligature steel bar structure.
The step of constructing the tower crane bearing platform comprises the following steps:
constructing a cushion layer and a brick moulding bed: constructing a concrete cushion 31 in a tower crane foundation pit, wherein the thickness of the cushion 31 is not less than 100mm, constructing a side wall brick molding bed of a tower crane bearing platform 3 after the construction of the cushion 31 is finished, constructing the side wall brick molding bed by adopting red bricks with the thickness of 240mm and M7.5 cement mortar, plastering cement mortar with the thickness of 20mm at the ratio of 1:2.5 on the inner side of the brick molding bed, enabling the inner clearance size of the brick molding bed to be equal to the size of the tower crane bearing platform 3, widening the cushion 31 out of the outer side edge of the brick molding bed by 100mm, and backfilling and tamping soil in the outer side gap;
manufacturing a steel bar structure: erecting a formwork in a brick mould and binding reinforcing steel bars to form a reinforcing steel bar structure, uniformly placing mortar cushion blocks under bottom row reinforcing steel bars of the reinforcing steel bar structure, arranging transverse reinforcing steel bars 6 at the joints of the reinforcing steel bar structure and the reserved parts 121 of the crown beams 12, and connecting the reinforcing steel bar structure, the reserved parts 121 of the crown beams 12 and the transverse reinforcing steel bars 6;
manufacturing a lightning protection grounding structure: inserting the grounding piece at least 1500mm below the ground, connecting the tower crane foundation section 4 and the grounding piece with the insulated copper cable with the cross-sectional area not less than 16 mm.
The arrangement of the cushion layer 31 ensures the elevation of the bottom surface of the tower crane bearing platform 3, and a brick molding bed is constructed on the cushion layer 31, so that the brick molding bed can be prevented from toppling over; the arrangement of the brick molding bed ensures the size of the tower crane bearing platform 3, the subsequent pouring is convenient, cement mortar is smeared on the inner side of the brick molding bed, on one hand, the strength of the brick molding bed can be enhanced, on the other hand, the waterproof effect can be achieved, soil is backfilled and tamped in the outer side gap of the brick molding bed, and the stability of the tower crane bearing platform 3 is enhanced; and a transverse reinforcing rib 6 is arranged at the joint of the steel bar structure and the reserved part 121 of the crown beam 12 to further reinforce the tower crane bearing platform 3.
The step of installing the tower crane foundation section specifically comprises the following steps: the foundation section begins pre-burying after the binding of steel bar structure's bottom plate muscle is accomplished, and the foundation section exceeds the bed course 31150mm, welds with four stands of C25 "L" type reinforcing bar and foundation section, and weld length 250mm carries out the super flat during the welding, ensures that the foundation section roughness error is within 5 m.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. Foundation ditch side slope tower crane construction method, be provided with a fender pile on the foundation ditch side slope, the tower crane includes tower crane pile foundation, tower crane cushion cap, tower crane foundation festival and tower crane, its characterized in that includes following step:
positioning and paying off: marking the position of the tower crane pile foundation on the foundation pit slope according to a positioning diagram;
constructing the tower crane pile foundation: constructing the support pile on the foundation pit side slope, constructing the tower crane pile foundation on one side of the support pile, which is far away from the foundation pit, constructing an oblique anchor rod in the foundation pit side slope towards one side of the tower crane pile foundation, which is far away from the foundation pit, wherein one end of the oblique anchor rod is connected with the tower crane pile foundation;
constructing the tower crane bearing platform: the tower crane bearing platform comprises a steel bar structure, a crown beam is arranged at the top of the supporting pile, a reserved part is preset at the position of the crown beam corresponding to the tower crane bearing platform, a transverse connecting steel bar and a part of vertical connecting steel bars at the top of the supporting pile are reserved in the reserved part, and the steel bar structure, the transverse connecting steel bars and the vertical connecting steel bars are connected;
installing the tower crane foundation section: welding the tower crane foundation section to the steel bar structure;
pouring the steel bar structure and the reserved part: integrally pouring and molding the tower crane bearing platform and the reserved part of the crown beam by using concrete, and watering and maintaining the tower crane bearing platform and the reserved part for a preset time;
and installing the tower crane on the tower crane foundation section to finish the construction of the foundation pit slope tower crane.
2. The foundation pit slope tower crane construction method according to claim 1, wherein a plurality of tower crane pile foundations are arranged on one side of the supporting pile, which is far away from the foundation pit, a plurality of oblique anchor rods are arranged on one side of the tower crane pile foundation, which is near to the supporting pile, which is far away from the foundation pit, the oblique anchor rods are distributed in a vertical direction, and one end of each oblique anchor rod is connected with the tower crane pile foundation, which is near to the supporting pile.
3. The foundation pit slope tower crane construction method according to claim 1 or 2, wherein an enlarged anchoring section is provided at one end of the oblique anchor rod away from the tower crane pile foundation.
4. The foundation pit slope tower crane construction method according to claim 3, wherein three grouting sections are arranged on the pile side of the tower crane pile foundation, each grouting section is provided with a grouting valve, each grouting valve is correspondingly provided with a grouting spray pipe, and the pile bottom of the tower crane pile foundation is provided with two grouting spray pipes.
5. The foundation pit slope tower crane construction method according to claim 4, wherein before the step of constructing the tower crane bearing platform, the foundation pit slope tower crane construction method further comprises the following steps:
excavating earthwork, breaking pile heads and clearing grooves: according to the size and the elevation excavation earthwork of tower crane cushion cap break pile head more than the pile top of tower crane pile foundation, clearance construction waste soil waste material and the tower crane foundation ditch tamp that will excavate.
6. The foundation pit slope tower crane construction method according to claim 5, wherein the step of constructing the tower crane bearing platform specifically comprises the steps of:
constructing a cushion layer and a brick moulding bed: constructing a concrete cushion layer in the tower crane foundation pit, wherein the thickness of the cushion layer is not less than 100mm, constructing a side wall brick molding bed of the tower crane bearing platform after the construction of the cushion layer is finished, constructing the side wall brick molding bed by adopting red bricks with the thickness of 240mm and M7.5 cement mortar, smearing the cement mortar with the thickness of 20mm at the inner side of the brick molding bed by adopting the ratio of 1:2.5, enabling the inner clearance size of the brick molding bed to be equal to the size of the tower crane bearing platform, widening the cushion layer by 100mm from the outer side edge of the brick molding bed, and backfilling and tamping soil in the outer side gap of the brick molding bed;
manufacturing the steel bar structure: erecting a formwork in the brick mould and binding reinforcing steel bars to form a reinforcing steel bar structure, uniformly placing mortar cushion blocks under bottom reinforcing steel bars of the reinforcing steel bar structure, arranging transverse reinforcing ribs at the joints of the reinforcing steel bar structure and the reserved parts of the crown beams, and connecting the reinforcing steel bar structure, the reserved parts of the crown beams and the transverse reinforcing ribs;
manufacturing a lightning protection grounding structure: inserting a ground member at least 1500mm below ground, connecting the tower crane foundation section and the ground member with an insulated copper cable having a cross-sectional area not less than 16 mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622590A (en) * | 2022-03-18 | 2022-06-14 | 中铁广州工程局集团深圳工程有限公司 | High-steep slope circular pier column in-situ single-pile upper tower crane foundation structure and construction method |
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| CN109024657A (en) * | 2018-08-29 | 2018-12-18 | 中国建筑第八工程局有限公司 | The construction method of Super High Core Walls Structure dell side complex conditions tower crane |
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| CN114622590B (en) * | 2022-03-18 | 2024-01-30 | 中铁广州工程局集团深圳工程有限公司 | High-steep slope circular pier column in-situ single pile tower crane foundation structure and construction method |
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