CN114991194B - Pile foundation construction method for multistage slope cutting - Google Patents
Pile foundation construction method for multistage slope cutting Download PDFInfo
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- CN114991194B CN114991194B CN202210679455.5A CN202210679455A CN114991194B CN 114991194 B CN114991194 B CN 114991194B CN 202210679455 A CN202210679455 A CN 202210679455A CN 114991194 B CN114991194 B CN 114991194B
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- 238000010276 construction Methods 0.000 title claims abstract description 30
- 238000005520 cutting process Methods 0.000 title claims abstract description 24
- 230000002787 reinforcement Effects 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000009415 formwork Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 abstract description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
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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
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- 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
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- 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
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
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- 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
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Foundations (AREA)
Abstract
The invention relates to a pile foundation construction method of multistage slope cutting, firstly cutting a slope on a mountain to form a main platform, then digging a pile foundation well on the main platform, then pouring a pile body, then taking the pile body on the main platform as a supporting pile to carry out slope cutting operation of a secondary platform, and then digging the pile foundation well on the secondary platform, and then pouring the pile body; if the depth of the pile foundation well of the auxiliary platform exceeds the safety depth of the pile foundation well, carrying out sectional construction on the pile body on the auxiliary platform, and carrying out pile body sectional pile extension operation above the auxiliary platform. According to the invention, platforms with different heights are made on a steep mountain in a multi-stage slope cutting mode, so that the problems of high construction difficulty and even incapability of construction of the steep mountain slope are solved; through the mode of pile extension, the problem that the excavation depth of the pile foundation well is greater than the safety depth upper limit of the pile foundation well is avoided, and the construction safety is ensured.
Description
Technical Field
The invention relates to the field of building construction, in particular to a pile foundation construction method for multistage slope cutting.
Background
When constructing under current mountain environment, need dig hole pouring pile foundation at the mountain and regard as the support of building, often meet the condition of carrying out construction on steep mountain, the building sideline is close to the steep mountain of both sides under this condition, leads to partial pile foundation to be located on steep slope, and the pile top is original domatic promptly, leads to appearing not having the problem such as ready-made construction platform, pile depth are great, and the construction degree of difficulty is big and the pile depth probably exceeds the construction safety requirement under this condition.
Disclosure of Invention
Based on the construction method, the invention provides a multi-stage slope-cutting pile foundation construction method, which is used for carrying out multi-stage slope cutting operation on the mountain, reducing damage to the mountain, and facilitating the operations of digging holes on the mountain, pouring the pile foundation and the like.
The technical purpose of the invention is realized by the following technical scheme:
a pile foundation construction method of multistage slope cutting includes the following steps:
and 5, carrying out well digging operation of pile foundations on the auxiliary platform to form a plurality of pile foundation wells, hoisting a reinforcement cage into the pile foundation wells, and then pouring concrete, and forming a pile body after the concrete in the pile foundation wells of the auxiliary platform is solidified.
Further, if the pile foundation well depth of the auxiliary platform exceeds the safety depth of the pile foundation well, the pile body on the auxiliary platform is subjected to sectional construction, pile body sectional pile extension operation is performed above the auxiliary platform, and the elevation of the upper end face of the pile body on the main platform is the same as that of the upper end face of the pile body on the auxiliary platform.
Further, for the pile body needing pile extension operation, the length of the reinforcement cage is larger than the depth of the pile foundation well, and the upper end of the reinforcement cage extends upwards from the pile foundation well to the upper part of the auxiliary platform; and after pile bodies in pile foundation wells of the auxiliary platform are poured and hardened, pile splicing operation is carried out above the auxiliary platform.
Further, during pile extension, pile reinforcing steel bars above the auxiliary platform are lapped and bound on the part of the reinforcing steel bar cage extending out of the auxiliary platform as a foundation, a pile foundation template is erected outside the pile reinforcing steel bars above the auxiliary platform, concrete is poured into the pile foundation template, and the pile extension is completed by removing the pile foundation template after the concrete is solidified.
Further, the method also comprises the step of pulling a drawknot beam between the pile body above the auxiliary platform and the pile body above the main platform.
Further, when pile reinforcement above the auxiliary platform is erected by pile extension, a tie beam steel bar framework is erected; and respectively erecting pile foundation templates and tie beam templates outside pile steel bars and tie beam steel rib frames, and then pouring concrete into the pile foundation templates and the tie beam templates.
Further, binding pile steel bars above the auxiliary platform to the elevation of the tie beam steel bar frame, and then binding the tie beam steel bar frame; firstly pouring a pile body below the tie Liang Jila tie beam elevation; binding the residual pile steel bars of the pile body above the elevation of the tie beam to the elevation of the top of the pile body after the concrete is solidified, and casting the pile body part above the elevation of the tie beam.
Further, after all pile body construction is completed, the formwork support of the pile body on the auxiliary platform is used as a structural bottom plate formwork support for main structural construction.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, platforms with different heights are made on a steep mountain in a multi-stage slope cutting mode, so that the problems of high construction difficulty and even incapability of construction of the steep mountain slope are solved;
2. the pile splicing method provided by the invention avoids the problem that the excavation depth of the pile foundation well is greater than the upper limit of the safety depth of the pile foundation well, and ensures the construction safety.
Drawings
FIG. 1 is a schematic diagram of a primary platform and a secondary platform in the present invention.
Fig. 2 is a schematic view of a sub-platform ground pile extension in the present invention.
Fig. 3 is a schematic view of a drawknot Liang Lashe in the present invention.
Fig. 4 is a schematic top view of a drawknot Liang Lashe of the present invention.
In the figure, 1, mountain; 2. a main platform; 3. a secondary platform; 4. a pile body; 5. pile foundation wells; 6. a tie beam; 7. underground piles; 8. piling on the ground; 9. a main body structure.
Detailed Description
The technical scheme of the invention is further described below with reference to the specific embodiments:
1-2, the method is used for constructing pile foundations on steep hills and comprises the following steps:
and 5, carrying out well digging operation of pile foundations on the auxiliary platform 3 to form a plurality of pile foundation wells 5, hoisting a reinforcement cage into the pile foundation wells 5 of the auxiliary platform, and then pouring concrete, and forming a pile body after the concrete in the pile foundation wells 5 of the auxiliary platform 3 is solidified.
Because the heights of the main platform 2 and the auxiliary platform 3 are different, and the building is finally built on the basis of the elevation of the pile body on the main platform 2, so that the pile body length of the auxiliary platform 3 is larger than that of the pile body on the main platform 2, the pile foundation well depth of the pile body of the auxiliary platform is larger than that of the pile foundation well of the main platform, and the manual well digging depth of the pile foundation well has the requirement that the safety depth upper limit cannot be exceeded, for example, the engineering manual well digging pile hole depth in Guangdong province cannot exceed 25 meters.
Therefore, if the pile foundation well depth of the auxiliary platform exceeds the safety depth, the pile body on the auxiliary platform 3 is subjected to sectional construction, the pile body on the auxiliary platform is divided into an overground pile 8 and an underground pile 7, the overground pile 8 and the underground pile 7 are subjected to pile body sectional pile extension operation above the auxiliary platform 3, and the elevation of the upper end face of the pile body on the main platform 2 is the same as that of the upper end face of the pile body on the auxiliary platform 3. And after the construction of all the piles is completed, the formwork support of the piles on the auxiliary platform 3 is used as a structural bottom plate formwork support to carry out the construction of the main structure 9.
When pile extension is performed, the length of a reinforcement cage of the underground pile 7 is larger than the depth of a pile foundation well, and the upper end of the reinforcement cage of the underground pile 7 extends upwards from the pile foundation well 5 to above the auxiliary platform; and after the pile body in the pile foundation well 5 of the auxiliary platform 3 is poured and hardened, pile extension operation is performed above the auxiliary platform.
When the pile 8 is constructed, pile steel bars above the auxiliary platform 3 are lapped and bound by taking a reinforcement cage of the underground pile 7 extending out of the auxiliary platform as a foundation, pile steel bars of the ground pile 8 are erected, then pile foundation templates are erected outside the pile steel bars of the ground pile 8, concrete is poured into the pile foundation templates, and pile splicing operation of the auxiliary platform is completed after the concrete in the pile foundation templates is solidified.
In order to increase the stability of the ground piles 8, tie beams 6 are also arranged between the ground piles 8 above the auxiliary platform 3 and the pile bodies on the main platform 2 in a pulling manner, and the tie beams 6 are arranged in a triangular manner as shown in figures 3-4. When a tie beam is required to be added, casting the ground piles 8 in a segmented manner, firstly, overlapping and binding pile steel bars of the ground piles 8 to the elevation of the tie beam 6, and then transversely erecting a tie beam steel rib frame; and building a pile foundation template and a tie beam template, and pouring concrete into the pile foundation template and the tie beam template to manufacture a tie beam and an overground pile below the elevation of the tie beam.
After the concrete of the overground piles 8 below the elevation of the drawknot beam 6 is cured, the overground piles 8 in the area above the elevation of the drawknot beam 6 are manufactured, and the pile reinforcements of the overground piles 8 below the elevation of the drawknot beam 6 are reserved when the pile reinforcements of the overground piles 8 below the elevation of the drawknot beam 6 are manufactured, and are bound by the pile reinforcements of the overground piles 8 above the elevation of the drawknot beam 6; pile reinforcement binding of the overground piles 8 in the area above the elevation of the tie beam 6 is completed, pile foundation templates are erected, and the overground piles 8 above the elevation of the tie beam 6 are poured.
The present embodiment is further illustrative of the present invention and is not to be construed as limiting the invention, and those skilled in the art can make no inventive modifications to the present embodiment as required after reading the present specification, but only as long as they are within the scope of the claims of the present invention.
Claims (6)
1. The pile foundation construction method for multistage slope cutting is characterized by comprising the following steps of:
step 1, selecting a slope cutting position on a mountain according to the distribution of pile foundations, performing slope cutting operation on the mountain, and forming a main platform on the mountain;
step 2, performing well digging operation of pile foundations on the main platform to form a plurality of pile foundation wells;
step 3, hoisting a reinforcement cage in the pile foundation well of the main platform, and pouring concrete into the pile foundation well of the main platform;
step 4, forming a pile body after hardening of pile foundation well concrete on the main platform is completed, and performing auxiliary platform slope cutting operation by taking the pile body on the main platform as a supporting pile, wherein the height of the auxiliary platform is lower than that of the main platform;
step 5, performing well digging operation of pile foundations on the auxiliary platform to form a plurality of pile foundation wells, hoisting a reinforcement cage into the pile foundation wells, and then pouring concrete, and forming a pile body after the concrete in the pile foundation wells of the auxiliary platform is solidified;
if the depth of the pile foundation well of the auxiliary platform exceeds the safety depth of the pile foundation well, carrying out sectional construction on the pile body on the auxiliary platform, and carrying out pile body sectional pile extension operation above the auxiliary platform; the elevation of the upper end face of the pile body on the main platform is the same as that of the upper end face of the pile body on the auxiliary platform;
and after the construction of all the piles is completed, the formwork support of the piles on the auxiliary platform is used as a structural bottom plate formwork support for main structural construction.
2. The multi-stage slope cutting pile foundation construction method according to claim 1, wherein for the pile body requiring pile splicing operation, the length of the reinforcement cage is longer than the depth of the pile foundation well, and the upper end of the reinforcement cage extends upwards from the pile foundation well to above the auxiliary platform; and after pile bodies in pile foundation wells of the auxiliary platform are poured and hardened, pile splicing operation is carried out above the auxiliary platform.
3. The method for constructing the pile foundation by multi-stage slope cutting according to claim 2, wherein during pile splicing, pile reinforcements above the auxiliary platform are lapped and bound on the part of the reinforcement cage extending out of the auxiliary platform as a basis, pile foundation templates are erected outside the pile reinforcements above the auxiliary platform, concrete is poured into the pile foundation templates, and after the concrete is solidified, the pile foundation templates are removed to finish pile splicing.
4. The multi-stage slope cutting pile foundation construction method of claim 2, further comprising pulling tie beams between the piles above the secondary platform and the piles above the primary platform.
5. The method for constructing a multilevel slope-cut pile foundation according to claim 4, wherein a tie beam steel bar frame is erected when pile reinforcements above the auxiliary platform are erected by pile splicing; and respectively erecting pile foundation templates and tie beam templates outside pile steel bars and tie beam steel rib frames, and then pouring concrete into the pile foundation templates and the tie beam templates.
6. The method for constructing a multilevel slope-cut pile foundation according to claim 5, wherein pile steel bars above the auxiliary platform are bound to tie beam steel bar frames elevation before the tie beam steel bar frames are bound; firstly pouring a pile body below the tie Liang Jila tie beam elevation; binding the residual pile steel bars of the pile body above the elevation of the tie beam to the elevation of the top of the pile body after the concrete is solidified, and casting the pile body part above the elevation of the tie beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210679455.5A CN114991194B (en) | 2022-06-16 | 2022-06-16 | Pile foundation construction method for multistage slope cutting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210679455.5A CN114991194B (en) | 2022-06-16 | 2022-06-16 | Pile foundation construction method for multistage slope cutting |
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| CN114991194A CN114991194A (en) | 2022-09-02 |
| CN114991194B true CN114991194B (en) | 2023-06-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111894023A (en) * | 2020-07-27 | 2020-11-06 | 中交路桥建设有限公司 | Construction method of steep-slope bridge foundation |
| CN112854251A (en) * | 2020-12-31 | 2021-05-28 | 中国建筑股份有限公司 | Multistage construction platform for critical stable slope and construction method thereof |
| CN113174956A (en) * | 2021-04-29 | 2021-07-27 | 中交路桥建设有限公司 | Method for reinforcing wind-blown sand high-steep slope construction platform and wind-blown sand high-steep slope structure |
| CN113529753B (en) * | 2021-07-09 | 2022-07-15 | 福建省地质工程勘察院 | Construction method for quickly treating hillock by grouting quick-setting high polymer |
| CN113981996A (en) * | 2021-11-03 | 2022-01-28 | 中国十七冶集团有限公司 | Construction method of combined type slide-resistant pile structure |
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