CN114000551B - Prefabricated sheet pile cylindrical foundation construction method easy to detect and bearing capacity detection method - Google Patents
Prefabricated sheet pile cylindrical foundation construction method easy to detect and bearing capacity detection method Download PDFInfo
- Publication number
- CN114000551B CN114000551B CN202111556403.0A CN202111556403A CN114000551B CN 114000551 B CN114000551 B CN 114000551B CN 202111556403 A CN202111556403 A CN 202111556403A CN 114000551 B CN114000551 B CN 114000551B
- Authority
- CN
- China
- Prior art keywords
- sheet pile
- prefabricated sheet
- bearing capacity
- cylindrical foundation
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 40
- 238000010276 construction Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000013461 design Methods 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000013459 approach Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- 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
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
-
- 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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/10—Prefabricated parts, e.g. composite sheet piles made of concrete or reinforced concrete
Abstract
The invention relates to the technical field of wind power generation, in particular to an easy-to-detect prefabricated sheet pile cylindrical foundation construction method and a bearing capacity detection method, which comprises 1) qualified detection of raw materials; 2) Constructing a prefabricated sheet pile cylindrical foundation according to the design by using the qualified raw materials; 3) And performing construction of the underground beam. According to the method for constructing the prefabricated sheet pile cylindrical foundation, disclosed by the invention, the step and the method for detecting the bearing capacity of the prefabricated sheet pile cylindrical foundation are simplified by adding the underground beam, and the underground beam can provide counter force for the prefabricated sheet pile cylindrical foundation in horizontal detection, so that the difficulty and the cost for detecting the bearing capacity of the prefabricated sheet pile cylindrical foundation are reduced; meanwhile, the strength of the prefabricated sheet pile cylindrical foundation is further improved by the underground beam, and the service life of the prefabricated sheet pile cylindrical foundation is prolonged.
Description
Technical Field
The invention relates to the field of wind power generation technology, in particular to an easy-to-detect prefabricated sheet pile cylindrical foundation construction method and a bearing capacity detection method.
Background
The prefabricated sheet pile cylindrical foundation is formed by grouting at the contact points by adopting the prefabricated sheet pile, and the diameter exceeds 10m.
The prefabricated sheet pile cylindrical foundation belongs to a newer foundation type, and currently, the reference offshore wind turbine foundation bearing capacity detection and the large-diameter bored concrete pile foundation detection are both adopted, the integrity and the pile body structural material performance are adopted, the bearing capacity of the pile body is not directly measured, and the project economy is poor.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a construction method of a prefabricated sheet pile cylindrical foundation.
The invention is realized by the following technical scheme:
a construction method of a prefabricated sheet pile cylindrical foundation easy to detect comprises the following steps:
1) Qualified detection of raw materials;
2) Constructing a prefabricated sheet pile cylindrical foundation according to the design by using the qualified raw materials;
3) And performing construction of the underground beam.
Preferably, in step 1), the detection of the raw material includes an approach detection of the precast sheet pile and an approach detection of the grouting material.
Preferably, in step 2), the prefabricated sheet pile cylindrical foundation is designed by adopting a mode of combining model experiment results, finite element calculation and engineering algorithms.
Preferably, the whole stress of the prefabricated sheet pile cylindrical foundation is calculated through a model test, a finite element method and an engineering algorithm, the results are compared, and the maximum value is taken as the design theoretical value of the prefabricated sheet pile cylindrical foundation.
Preferably, a certain safety guarantee coefficient is taken for the design theoretical value, and the design theoretical value and the safety guarantee coefficient are multiplied to obtain the bearing capacity design value of the prefabricated sheet pile cylindrical foundation.
Preferably, the safety guarantee coefficient is greater than or equal to 2.
Preferably, in step 2), the prefabricated sheet pile tubular foundation comprises the steps of:
31 Paying off the engineering pile;
32 Pile sinking of the engineering pile is carried out;
33 Grouting the connection part of the prefabricated sheet piles;
34 Maintenance of prefabricated sheet piles and recovery of soil bearing capacity in rest period.
Preferably, in step 3), the underground beams are designed with thrust resistance obtained by the limit balance method.
The bearing capacity detection method of the prefabricated sheet pile cylindrical foundation comprises vertical bearing capacity detection and horizontal bearing capacity detection, wherein the vertical bearing capacity detection is carried out by adopting a stacking method; when the horizontal bearing capacity is detected, a jack is used between the prefabricated sheet pile cylindrical foundation and the underground beam, and the maximum counter force of the underground beam is used for detecting whether the horizontal bearing capacity of the cylindrical foundation is qualified.
Compared with the prior art, the invention has the following beneficial effects:
according to the method for constructing the prefabricated sheet pile cylindrical foundation, disclosed by the invention, the step and the method for detecting the bearing capacity of the prefabricated sheet pile cylindrical foundation are simplified by adding the underground beam, and the underground beam can provide counter force for the prefabricated sheet pile cylindrical foundation in horizontal detection, so that the difficulty and the cost for detecting the bearing capacity of the prefabricated sheet pile cylindrical foundation are reduced; meanwhile, the strength of the prefabricated sheet pile cylindrical foundation is further improved by the underground beam, and the service life of the prefabricated sheet pile cylindrical foundation is prolonged.
The method for detecting the bearing capacity of the prefabricated sheet pile cylindrical foundation is economical and flexible, the size and the shape of the counter force provided by the underground beam can be changed according to the needs, the applicability is high, and the popularization and the use are facilitated.
Drawings
FIG. 1 is a schematic view of a construction method of a tubular foundation of a precast sheet pile according to the present invention;
Detailed Description
The invention will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the invention.
The invention discloses a construction method of a prefabricated sheet pile cylindrical foundation easy to detect, which comprises the following steps with reference to fig. 1:
1) Qualified detection of raw materials;
the detection of the raw materials comprises the advance detection of the precast sheet pile and the advance detection of the grouting material.
The approach detection of the prefabricated steel plate material comprises the strength and quality of the prefabricated plate pile, the size and appearance of the embedded steel plate, the factory certification of the prefabricated plate pile and the strength sampling detection.
The detection of the grouting material comprises factory proof detection, strength sampling detection and mixing fluidity detection of the grouting material.
2) And constructing the prefabricated sheet pile cylindrical foundation according to the design by using the qualified raw materials.
The prefabricated sheet pile cylindrical foundation is designed by adopting a mode of combining model experiment results, finite element calculation and engineering algorithm.
The design process of the prefabricated sheet pile cylindrical foundation is as follows: the whole stress of the prefabricated sheet pile cylindrical foundation is calculated through a model test, a finite element method and an engineering algorithm, the results are compared, and the maximum value is taken as a design theoretical value of the prefabricated sheet pile cylindrical foundation.
And then taking a certain safety guarantee coefficient for the design theoretical value, wherein the safety guarantee coefficient is greater than or equal to 2, and multiplying the design theoretical value by the safety guarantee coefficient to obtain the bearing capacity design value of the prefabricated sheet pile cylindrical foundation.
The construction steps of the prefabricated sheet pile cylindrical foundation comprise the following steps:
21 Paying off the engineering pile;
22 Pile sinking of the engineering pile is carried out;
23 Grouting the connection part of the prefabricated sheet piles;
24 Maintenance of prefabricated sheet piles and recovery of soil bearing capacity in rest period.
3) And performing construction of the underground beam.
The underground beam is designed by utilizing the thrust resistance obtained by the limit balance method.
The construction steps of the underground beam comprise the following steps:
31 Earth excavation;
32 Laying a cushion layer;
33): binding a reinforcement cage;
34 Pouring concrete;
35 Curing the concrete.
A bearing capacity detection method of a prefabricated sheet pile cylindrical foundation comprises vertical bearing capacity detection and horizontal bearing capacity detection, wherein the vertical bearing capacity detection is carried out by adopting a stacking method.
The vertical bearing capacity detection step is as follows: firstly, a bearing platform is arranged on the pile top by using a steel beam, then a heavy object is piled up above the bearing platform, and the platform can be gradually jacked up by using a jack placed on the pile head, so that gravity is added to the pile body, and the pile loading counterforce beam device is formed. The main beam of the counterforce device is made of steel material directly, and the shape of the platform is rectangular or square. The stacking object selects a steel loading block.
When the horizontal bearing capacity is detected, a jack is used between the prefabricated sheet pile cylindrical foundation and the underground beam, and the maximum counter force of the underground beam is used for detecting whether the horizontal bearing capacity of the cylindrical foundation is qualified.
Claims (3)
1. The construction method of the prefabricated sheet pile cylindrical foundation easy to detect is characterized by comprising the following steps of:
1) Qualified detection of raw materials;
2) Constructing a prefabricated sheet pile cylindrical foundation according to the design by using the qualified raw materials;
the prefabricated sheet pile cylindrical foundation is designed by adopting a mode of combining model experimental results, finite element calculation and engineering algorithm, and the concrete process is as follows: respectively calculating the overall stress of the prefabricated sheet pile cylindrical foundation by a model test, a finite element method and an engineering algorithm, comparing the results, and taking the maximum value as a design theoretical value of the prefabricated sheet pile cylindrical foundation; then, taking a certain safety guarantee coefficient for the design theoretical value, and multiplying the design theoretical value by the safety guarantee coefficient to obtain a bearing capacity design value of the prefabricated sheet pile cylindrical foundation;
the construction comprises the following steps:
21 Paying off the engineering pile;
22 Pile sinking of the engineering pile is carried out;
23 Grouting the connection part of the prefabricated sheet piles;
24 Curing the prefabricated sheet piles and recovering the bearing capacity of the soil body in the rest period;
3) Constructing an underground beam, and designing the underground beam by utilizing the thrust resistance obtained by a limit balance method;
the method comprises the steps of detecting the bearing capacity of a prefabricated sheet pile cylindrical foundation, wherein the bearing capacity detection comprises vertical bearing capacity detection and horizontal bearing capacity detection, and the vertical bearing capacity detection is carried out by adopting a stacking method; when the horizontal bearing capacity is detected, a jack is used between the prefabricated sheet pile cylindrical foundation and the underground beam, and the maximum counter force of the underground beam is used for detecting whether the horizontal bearing capacity of the cylindrical foundation is qualified.
2. The method for constructing a tubular foundation of a prefabricated sheet pile which is easy to detect according to claim 1, wherein in the step 1), the detection of the raw material includes the detection of the advance of the prefabricated sheet pile and the detection of the advance of the grouting material.
3. The method for constructing a tubular foundation of an easily detectable precast sheet pile according to claim 1, wherein the safety assurance coefficient is greater than or equal to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111556403.0A CN114000551B (en) | 2021-12-17 | 2021-12-17 | Prefabricated sheet pile cylindrical foundation construction method easy to detect and bearing capacity detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111556403.0A CN114000551B (en) | 2021-12-17 | 2021-12-17 | Prefabricated sheet pile cylindrical foundation construction method easy to detect and bearing capacity detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114000551A CN114000551A (en) | 2022-02-01 |
| CN114000551B true CN114000551B (en) | 2023-06-06 |
Family
ID=79932169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111556403.0A Active CN114000551B (en) | 2021-12-17 | 2021-12-17 | Prefabricated sheet pile cylindrical foundation construction method easy to detect and bearing capacity detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114000551B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202494U (en) * | 1985-05-21 | 1986-06-11 | 陆祖荫 | Interlocked reinforced concrete sheet pile |
| US8226354B2 (en) * | 2007-12-26 | 2012-07-24 | General Electric Company | Magnetostrictive measurement of tensile stress in foundations |
| CN203034498U (en) * | 2013-01-07 | 2013-07-03 | 中国建筑第六工程局有限公司 | Horizontal bearing capability test device of piles in permafrost region |
| CN103046585B (en) * | 2013-01-28 | 2015-10-28 | 中国电建集团西北勘测设计研究院有限公司 | Foundation single pile of wind power horizontal force bearing capacity Static Load Test Method |
| CN207974164U (en) * | 2018-01-23 | 2018-10-16 | 中国建筑第八工程局有限公司 | A kind of pile foundation level loading test device |
-
2021
- 2021-12-17 CN CN202111556403.0A patent/CN114000551B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114000551A (en) | 2022-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhu et al. | Installation and lateral loading tests of suction caissons in silt | |
| CN206512764U (en) | A kind of horizontally loading test system for applying vertical load in stake top | |
| Jia et al. | Bearing capacity of composite bucket foundations for offshore wind turbines in silty sand | |
| CN103911983B (en) | Tire-gravel drainage pile treatment process of composite foundation | |
| CN107975075B (en) | Construction process for existing load-bearing engineering foundation pile detection structure measures | |
| CN209243794U (en) | A kind of pile foundation building inclination rectification cuts stake and underpins position limiting structure | |
| CN201411706Y (en) | Prestress anchor bolt prefabricated assembled cylinder blower base | |
| CN111855426A (en) | Vertical resistance to compression static load test device of engineering stake | |
| CN203145066U (en) | Offshore single-pile basic horizontal carrying force loading device | |
| CN114000551B (en) | Prefabricated sheet pile cylindrical foundation construction method easy to detect and bearing capacity detection method | |
| CN105569067A (en) | Foundation structure applicable to pre-stressed rock anchor rod fan base and construction method of foundation structure | |
| Xu et al. | Model tests on the bearing capacity of precast open-ended micro pipe piles in soft soil | |
| Ren et al. | Analysis on bearing performance of Y-shaped piles under compressive and tensile loading | |
| CN104674857A (en) | Drive-and-press pile foundation bearing capability detection method | |
| Shin et al. | Design of composite pile foundations for offshore wind turbines | |
| CN115481478A (en) | Mechanical property simulation method for large-diameter annular foundation pile | |
| CN205205848U (en) | Cavity gravity type marine wind power basis | |
| CN203569600U (en) | Pile bottom bedrock load test device | |
| CN110593298A (en) | Composite foundation for improving bearing performance of cylindrical foundation by using auxiliary piles and construction method thereof | |
| CN104532884B (en) | A kind of buttress outer eccentric accumulation load method foundation pile test for static load, pile pressing method | |
| CN220450929U (en) | Effective detection device of prestressing force anti-floating pile | |
| CN211080216U (en) | Inclined tubular pile filling mechanism | |
| CN215977350U (en) | Prefabricated barrel-shaped basis of shallow surface stratum region photovoltaic support | |
| CN114086615A (en) | Construction method of tubular foundation of secant pile and bearing capacity detection method thereof | |
| AL-Amrani et al. | Prefabricated and Prestressed Bio-Concrete Piles: Case Study in North Jakarta |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231218 Address after: 102209 building a, Huaneng talent innovation and entrepreneurship base, Beiqijia future science and Technology City, Changping District, Beijing Patentee after: HUANENG CLEAN ENERGY Research Institute Patentee after: Huaneng Jilin Power Generation Co.,Ltd. Address before: 102209 building a, Huaneng talent innovation and entrepreneurship base, Beiqijia future science and Technology City, Changping District, Beijing Patentee before: HUANENG CLEAN ENERGY Research Institute |