CN115233726A - Tower crane foundation construction method in deep mucky soil area - Google Patents
Tower crane foundation construction method in deep mucky soil area Download PDFInfo
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- CN115233726A CN115233726A CN202210903211.0A CN202210903211A CN115233726A CN 115233726 A CN115233726 A CN 115233726A CN 202210903211 A CN202210903211 A CN 202210903211A CN 115233726 A CN115233726 A CN 115233726A
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- tower crane
- crane foundation
- construction
- pile
- jet grouting
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- 238000010276 construction Methods 0.000 title claims abstract description 69
- 239000002689 soil Substances 0.000 title claims abstract description 33
- 238000009412 basement excavation Methods 0.000 claims description 14
- 239000004035 construction material Substances 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 11
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000012550 audit Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
Abstract
The invention discloses a tower crane foundation construction method in a deep mucky soil area, which comprises the following steps: 1. determining the position of a tower crane foundation; 2. constructing a high-pressure jet grouting pile; 3. constructing an engineering pile; 4. excavating earth; 5. constructing a mattress layer; 6. flattening the field and tamping a mattress layer; 7. constructing a tower crane foundation; 8. and constructing the basement raft, and integrating the tower crane foundation and the basement raft. The invention adopts the measure that the high-pressure jet grouting pile pre-reinforced soil body and the tower crane foundation body extend outwards for one more column-span raft plate during construction, thereby effectively solving the problems that the tower crane foundation is not easy to construct after the earthwork is excavated to the bottom of the foundation pit and the engineering pile is easy to horizontally shift in the using process of the tower crane in the previous period.
Description
Technical Field
The invention belongs to the technical field of tower crane foundation construction in a muddy area, and particularly relates to a tower crane foundation construction method in a deep muddy soil area.
Background
A large amount of mucky soil exists in coastal areas, and the thickness of the mucky soil layer is large, so that great difficulty is brought to the construction of a tower crane foundation, particularly for super high-rise buildings. Moreover, the tower crane has large quality and potential safety hazards in the early use process, and the main performance is that the tower crane foundation is easy to shift due to the influence of horizontal load. The prior case of constructing a tower crane foundation in mucky soil exists, but the prior art has the following defects:
1. the tower crane foundation construction is completed before the earth excavation, and the excavation construction period is influenced. According to the method, the earthwork excavation progress is influenced by the approval and installation informing procedures of the tower crane construction scheme, and the earthwork excavation can be started after the tower crane is installed, so that the construction period is greatly influenced;
2. the tower crane foundation is overhung by the steel pipe column, so that the safety risk is high. The tower crane foundation is heavy, and a vertical load and a horizontal load are added after the tower crane starts to operate, so that the tower crane foundation is suspended above the steel pipe column, the bearing capacity of the steel pipe column is extremely high, and great potential safety hazards are brought to later construction;
3. the steel-pipe column is separated on 4 engineering piles, and is extremely high to the construction requirement of engineering pile, if some engineering piles produce to subside and with other stake settlement inconsistent, then the tower crane foundation faces abandonment risk.
Disclosure of Invention
The invention aims to solve the technical problem that aiming at the defects in the prior art, the invention provides a tower crane foundation construction method in a deep muddy soil area, which adopts the measure that a high-pressure jet grouting pile is adopted to pre-reinforce a soil body and a tower crane foundation body extends outwards for one more column-span raft plate during construction, thereby effectively solving the problems that the tower crane foundation is difficult to construct after earthwork is excavated to the bottom of a foundation pit and engineering piles are easy to horizontally shift in the using process of a tower crane in the previous period, and being convenient for popularization and use.
In order to solve the technical problems, the invention adopts the technical scheme that: a tower crane foundation construction method in a deep mucky soil area is characterized by comprising the following steps:
step one, determining the position of a tower crane foundation:
determining the position of a tower crane foundation in the existing engineering pile construction area by combining the construction material transportation route and the hoisting distance;
step two, constructing the high-pressure jet grouting pile:
carrying out high-pressure jet grouting pile construction below the tower crane foundation, extending a span from the lower part of the tower crane foundation, pre-reinforcing silt foundation soil, and providing a platform for the walking of construction machinery during tower crane foundation construction;
step three, construction of engineering piles:
after the construction of the high-pressure jet grouting pile is completed, the construction of the engineering pile is carried out in an engineering pile construction area in a deep muddy soil area, so that the engineering pile is embedded in the high-pressure jet grouting pile, and the high-pressure jet grouting pile links the engineering piles in the two span column distance range below the tower crane foundation into a whole;
step four, earth excavation:
after the construction of the engineering pile is completed and the engineering pile has the earthwork excavation condition, excavating the earthwork to the elevation of the top of the high-pressure jet grouting pile;
step five, constructing a mattress layer:
arranging a mattress layer on the top of the high-pressure rotary jet grouting pile, wherein the mattress layer effectively disperses the load transmitted from the bottom of the tower crane foundation, so that the load at the bottom of the tower crane foundation is uniformly transmitted to the top of the rotary jet grouting pile;
step six, flattening the field and tamping a mattress layer;
step seven, constructing a tower crane foundation:
simultaneously constructing the tower crane foundation and the extended one-span column distance basement raft, arranging cross hidden beams in the tower crane foundation, extending the cross hidden beams outwards for one span from the interior of the tower crane foundation, and forming the tower crane foundation;
step eight, constructing a basement raft, and integrating the tower crane foundation and the basement raft into a whole:
and (3) installing a tower crane body, hoisting the construction materials required by the basement raft to the pit bottom by using the tower crane, starting to construct the basement raft, and finally integrating the tower crane foundation and the basement raft into a whole.
The tower crane foundation construction method in the deep mucky soil area is characterized by comprising the following steps: in the first step, the BIM technology is utilized to carry out construction site three-dimensional arrangement, and the position of a tower crane foundation is determined in the existing engineering pile construction area by combining the construction material transportation route, the lifting distance and the requirement that the construction material is not moved any more in the later period.
The tower crane foundation construction method in the deep mucky soil area is characterized by comprising the following steps: the pile length of the high-pressure jet grouting pile is 1.5-2 m, and the pile driving distance of the high-pressure jet grouting pile is equal to the diameter of the pile body of the high-pressure jet grouting pile.
The tower crane foundation construction method in the deep mucky soil area is characterized by comprising the following steps: the engineering pile is a concrete cast-in-place pile.
The tower crane foundation construction method in the deep mucky soil area is characterized by comprising the following steps: the thickness of the mattress layer is 200 mm-300 mm.
Compared with the prior art, the invention has the following advantages:
1. the tower crane foundation construction is completed after the earth excavation, the excavation construction period is not influenced, and the popularization and the use are convenient.
2. The invention utilizes the high-pressure jet grouting pile to pre-reinforce the mucky soil below the tower crane foundation, solves the problem of walking of construction machinery when the tower crane foundation is installed after the earthwork is excavated to the bottom, and has the advantages of reliability, stability and good use effect.
3. The method has simple steps, and the high-pressure jet grouting piles are utilized to connect the two-span engineering piles below the tower crane foundation into a whole, so that the vertical bearing capacity and the horizontal lateral displacement resistance of the engineering piles below the tower crane foundation in the mucky soil are effectively improved, the uneven settlement or the large horizontal displacement of the engineering piles caused by the vertical and horizontal loads generated by the use of the tower crane before the raft plates are not connected into a whole is avoided, and the method is convenient to popularize and use.
In conclusion, the invention adopts the measure that the high-pressure jet grouting pile pre-reinforces the soil body and the tower crane foundation body extends outwards by one more column-span raft plate during construction, effectively solves the problems that the tower crane foundation is not easy to construct after the earthwork is excavated to the bottom of the foundation pit and the engineering pile is easy to horizontally shift in the using process of the tower crane in the previous period, and is convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic view of the construction structure of the present invention.
Fig. 2 is a perspective view of fig. 1.
FIG. 3 is a block diagram of a method flow of the present invention.
Description of reference numerals:
1-engineering pile; 2-high pressure jet grouting pile; 3, a mattress layer;
4-basement raft plate; 5, a tower crane body; 6, a tower crane foundation;
7-crossing hidden beam.
Detailed Description
As shown in FIGS. 1 to 3, the construction method of the tower crane foundation in the deep mucky soil area comprises the following steps:
step one, determining the position of a tower crane foundation:
determining the position of a tower crane foundation in the existing engineering pile construction area by combining the construction material transportation route and the hoisting distance;
step two, constructing a high-pressure jet grouting pile:
performing high-pressure jet grouting pile construction below the tower crane foundation, extending a span from the lower part of the tower crane foundation, pre-reinforcing silt foundation soil, and providing a platform for the walking of construction machinery during tower crane foundation construction;
step three, construction of engineering piles:
after the construction of the high-pressure jet grouting pile is completed, the construction of the engineering pile is carried out in an engineering pile construction area in a deep muddy soil area, so that the engineering pile is embedded in the high-pressure jet grouting pile, and the high-pressure jet grouting pile links the engineering piles in the two span column distance range below the tower crane foundation into a whole;
step four, earth excavation:
after the construction of the engineering pile is completed and the engineering pile has the earthwork excavation condition, excavating the earthwork to the elevation of the top of the high-pressure jet grouting pile;
step five, constructing a mattress layer:
arranging a mattress layer on the top of the high-pressure rotary jet grouting pile, wherein the mattress layer effectively disperses the load transmitted from the bottom of the tower crane foundation, so that the load at the bottom of the tower crane foundation is uniformly transmitted to the top of the rotary jet grouting pile;
step six, leveling the field and tamping the mattress layer;
seventhly, constructing a tower crane foundation:
simultaneously constructing the tower crane foundation and the extended one-span column distance basement raft, arranging cross hidden beams in the tower crane foundation, extending the cross hidden beams outwards for one span from the interior of the tower crane foundation, and forming the tower crane foundation;
step eight, constructing a basement raft, and integrating the tower crane foundation and the basement raft into a whole:
and (3) installing a tower crane body, hoisting the construction materials required by the basement raft to the pit bottom by using the tower crane, starting to construct the basement raft, and finally integrating the tower crane foundation and the basement raft into a whole.
In the embodiment, in the first step, the Building Information Modeling (BIM) technology is utilized to carry out construction site three-dimensional arrangement, and the position of the tower crane foundation is determined in the existing engineering pile construction area by combining the construction material transportation route, the lifting distance and the requirement that the construction material does not move any more in the later period.
In this embodiment, the pile length of the high-pressure jet grouting pile is 1.5 m-2 m, and the pile driving distance of the high-pressure jet grouting pile is equal to the diameter of the pile body of the high-pressure jet grouting pile.
In this embodiment, the engineering pile is a concrete cast-in-place pile.
In this embodiment, the thickness of the mattress layer is 200mm to 300mm.
The method comprises the steps of utilizing BIM technology to carry out construction site three-dimensional arrangement, determining the most reasonable position of a tower crane, determining the position of the tower crane, using high-pressure rotary spraying 2 to pre-reinforce muddy soil extending from the lower part of a tower crane foundation in a stride on the natural ground, then starting construction of an engineering pile 1, forming the engineering pile 1 and the high-pressure rotary spraying pile layer into a whole, carrying out earthwork excavation after the engineering reaches the excavation condition, excavating to the high-pressure rotary spraying pile top elevation, then constructing a mattress layer 3, starting construction of a tower crane foundation 6, extending from the tower crane foundation 6 to a basement raft 4, and arranging a cross hidden beam 7 in the tower crane foundation 6 and the basement raft 4 when the tower crane foundation 6 and the basement raft 4 are constructed.
According to the invention, existing engineering piles are used, separate piling under a tower crane foundation is avoided, the engineering cost is reduced, the construction of the tower crane foundation 6 and the installation of the tower crane tower body 5 are carried out after earthwork is excavated to the bottom of a foundation pit, the influence of procedures such as tower crane scheme audit and installation notification on the construction period is avoided, the soft soil body under the tower crane foundation is pretreated by using the high-pressure jet grouting piles and is integrated with the engineering piles, the problem of mechanical walking at the bottom of the foundation pit when the tower crane tower body 5 is installed is solved, the vertical bearing capacity and the horizontal lateral movement resistance of the engineering piles in muddy soil under the tower crane foundation are improved, and the problem of uneven settlement or large horizontal displacement of the engineering piles caused by vertical and horizontal loads generated by the use of the tower crane before raft plates are not connected into a whole is avoided.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (5)
1. A tower crane foundation construction method in a deep mucky soil area is characterized by comprising the following steps:
step one, determining the position of a tower crane foundation:
determining the position of a tower crane foundation in the existing engineering pile construction area by combining the construction material transportation route and the hoisting distance;
step two, constructing the high-pressure jet grouting pile:
performing high-pressure jet grouting pile construction below the tower crane foundation, extending a span from the lower part of the tower crane foundation, pre-reinforcing silt foundation soil, and providing a platform for the walking of construction machinery during tower crane foundation construction;
step three, construction of engineering piles:
after the construction of the high-pressure jet grouting pile is completed, the construction of the engineering pile is carried out in an engineering pile construction area in a deep muddy soil area, so that the engineering pile is embedded in the high-pressure jet grouting pile, and the high-pressure jet grouting pile links the engineering piles in the two span column distance range below the tower crane foundation into a whole;
step four, earth excavation:
after the construction of the engineering pile is completed and the engineering pile has the earthwork excavation condition, excavating the earthwork to the elevation of the top of the high-pressure jet grouting pile;
step five, constructing a mattress layer:
arranging a mattress layer on the top of the high-pressure rotary jet grouting pile, wherein the mattress layer effectively disperses the load transmitted from the bottom of the tower crane foundation, so that the load at the bottom of the tower crane foundation is uniformly transmitted to the top of the rotary jet grouting pile;
step six, leveling the field and tamping the mattress layer;
step seven, constructing a tower crane foundation:
constructing the tower crane foundation and the extended one-span column distance basement raft plate simultaneously, arranging a cross hidden beam in the tower crane foundation, extending the cross hidden beam outwards for one span from the interior of the tower crane foundation, and forming the tower crane foundation;
step eight, constructing a basement raft, and integrating the tower crane foundation and the basement raft into a whole:
and (3) installing a tower crane body, hoisting the construction materials required by the basement raft to the bottom of the pit by using a tower crane, starting to construct the basement raft, and finally integrating the tower crane foundation and the basement raft into a whole.
2. The construction method of the tower crane foundation in the deep mucky soil area according to claim 1, which is characterized in that: in the first step, the BIM technology is used for carrying out construction site three-dimensional arrangement, and the position of a tower crane foundation is determined in the existing engineering pile construction area by combining a construction material transportation route, a lifting distance and the requirement that the construction material is not moved any more in the later period.
3. The construction method of the tower crane foundation in the deep mucky soil area according to claim 1, which is characterized in that: the pile length of the high-pressure jet grouting pile is 1.5-2 m, and the pile driving distance of the high-pressure jet grouting pile is equal to the diameter of the pile body of the high-pressure jet grouting pile.
4. The construction method of the tower crane foundation in the deep mucky soil area according to claim 1, which is characterized in that: the engineering pile is a concrete cast-in-place pile.
5. The construction method of the tower crane foundation in the deep mucky soil area according to claim 1, which is characterized in that: the thickness of the mattress layer is 200 mm-300 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210903211.0A CN115233726A (en) | 2022-07-29 | 2022-07-29 | Tower crane foundation construction method in deep mucky soil area |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210903211.0A CN115233726A (en) | 2022-07-29 | 2022-07-29 | Tower crane foundation construction method in deep mucky soil area |
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| CN115233726A true CN115233726A (en) | 2022-10-25 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202881965U (en) * | 2012-07-11 | 2013-04-17 | 浙江中成建工集团有限公司 | High-torque pre-arranged type tower crane foundation in deep foundation pit |
| CN103243721A (en) * | 2013-05-22 | 2013-08-14 | 中国建筑第八工程局有限公司 | Raft foundation and core tube excavation construction method of high-rise building under weak geological conditions |
| CN205024712U (en) * | 2015-08-24 | 2016-02-10 | 中建一局集团第五建筑有限公司 | Modular tower crane basis |
| CN105649103A (en) * | 2016-03-24 | 2016-06-08 | 广西建工集团第五建筑工程有限责任公司 | Pile-beam structure integrated tower crane foundation structure and construction method thereof |
| CN111042185A (en) * | 2020-01-13 | 2020-04-21 | 中冶建工集团有限公司 | Construction method of basement raft foundation with tower crane foundation |
| CN214460574U (en) * | 2020-11-11 | 2021-10-22 | 中建八局西南建设工程有限公司 | Pipe pile supporting suspended reinforced concrete bearing platform tower crane foundation |
| US20230064296A1 (en) * | 2020-05-21 | 2023-03-02 | Guangdong Polytechnic Of Water Resources And Electric Engineering | Water Intake Pipeline Structure Passing Through Soft Foundation Embankment Below Flood Level and Construction Method |
-
2022
- 2022-07-29 CN CN202210903211.0A patent/CN115233726A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202881965U (en) * | 2012-07-11 | 2013-04-17 | 浙江中成建工集团有限公司 | High-torque pre-arranged type tower crane foundation in deep foundation pit |
| CN103243721A (en) * | 2013-05-22 | 2013-08-14 | 中国建筑第八工程局有限公司 | Raft foundation and core tube excavation construction method of high-rise building under weak geological conditions |
| CN205024712U (en) * | 2015-08-24 | 2016-02-10 | 中建一局集团第五建筑有限公司 | Modular tower crane basis |
| CN105649103A (en) * | 2016-03-24 | 2016-06-08 | 广西建工集团第五建筑工程有限责任公司 | Pile-beam structure integrated tower crane foundation structure and construction method thereof |
| CN111042185A (en) * | 2020-01-13 | 2020-04-21 | 中冶建工集团有限公司 | Construction method of basement raft foundation with tower crane foundation |
| US20230064296A1 (en) * | 2020-05-21 | 2023-03-02 | Guangdong Polytechnic Of Water Resources And Electric Engineering | Water Intake Pipeline Structure Passing Through Soft Foundation Embankment Below Flood Level and Construction Method |
| CN214460574U (en) * | 2020-11-11 | 2021-10-22 | 中建八局西南建设工程有限公司 | Pipe pile supporting suspended reinforced concrete bearing platform tower crane foundation |
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