CN106836261B - Rock foundation structure suitable for power transmission line construction and construction method thereof - Google Patents
Rock foundation structure suitable for power transmission line construction and construction method thereof Download PDFInfo
- Publication number
- CN106836261B CN106836261B CN201710077909.0A CN201710077909A CN106836261B CN 106836261 B CN106836261 B CN 106836261B CN 201710077909 A CN201710077909 A CN 201710077909A CN 106836261 B CN106836261 B CN 106836261B
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- foundation
- reinforcement cage
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- bolt
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- 239000011435 rock Substances 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 title claims abstract description 14
- 230000002787 reinforcement Effects 0.000 claims abstract description 57
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 239000002184 metal Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 10
- 238000003466 welding Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
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
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- 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
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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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
Abstract
The invention discloses a rock foundation structure suitable for power transmission line construction, which comprises a reinforcement cage and foundation bolts arranged in the reinforcement cage, wherein the reinforcement cage and the foundation bolts are welded into an integral structure through connecting steel bars. The foundation pit positioning device has the advantages that the reinforcement cage and the foundation bolts are used as a combined body for the first time, assembling and processing are carried out before the foundation pit is hoisted, and the foundation bolt positioning process is completed by the method of integrally adjusting and positioning the combined body for the first time. The efficiency of transmission line rock foundation mechanized construction has been promoted greatly, has guaranteed the key problem of foundation construction, and the accuracy of rag bolt location optimizes the positioning process. Meanwhile, the new steel reinforcement cage and foundation bolt combination can transmit upper load more reasonably, the foundation stress is more uniform, and the foundation bearing capacity is improved.
Description
Technical Field
The invention relates to a reinforcement cage-foundation bolt integrated structure suitable for mechanized construction of a rock hole digging foundation of a power transmission line.
Background
The hole digging type foundation is a tower foundation type commonly used in power transmission line engineering in China, and is characterized in that a foundation pit with a foundation design shape is firstly dug in a natural foundation by utilizing manpower (or machinery), then a steel bar framework, pre-embedded foundation bolts and other types of connecting pieces are directly erected in the foundation pit, and finally concrete is directly poured in the foundation pit by replacing a mold with stones to form a foundation body integrating the foundation pit and the concrete.
Specifically, the construction method and the main processes of the traditional hole digging foundation in the rock foundation generally comprise: (1) excavating a foundation pit, namely excavating a foundation pit with a foundation size in a rock foundation mechanically or manually; (2) hoisting a foundation reinforcement cage into the foundation pit, and adjusting and positioning; (3) hoisting the foundation bolt into the foundation pit, and adjusting and positioning; (4) and (5) supporting a formwork on the part of the foundation exposed out of the ground, and pouring foundation concrete.
The collision of foundation bolts and a reinforcement cage is easily caused when the reinforcement cage is hoisted and placed firstly and then the foundation bolts are hoisted and placed in the traditional construction structure and method, so that the positioning is changed and is not accurate.
Disclosure of Invention
The invention aims to solve the technical problem of realizing a rock foundation structure which is convenient and efficient to install, and reasonable and reliable in combination.
In order to achieve the purpose, the invention adopts the technical scheme that: rock foundation structure suitable for transmission line construction, including steel reinforcement cage and arrange the rag bolt in the steel reinforcement cage in, be a body structure through connecting reinforcement welding between steel reinforcement cage and the rag bolt.
The steel reinforcement cage is internally and horizontally provided with a plurality of layers of support steel bars, and the foundation bolts are welded on the support steel bars.
The foundation bolts are bundled on the support steel bars through the connecting steel bars, and the support steel bars are welded with the connecting steel bar supports.
The foundation bolt comprises a base and fixing columns fixed on the base, a center hole in the center of support steel bars of the bottom layer is smaller than that of the base, and center holes for the base to be placed in are formed in the centers of other support steel bars of each layer.
The construction method of the rock foundation structure suitable for the construction of the power transmission line comprises the following steps: 1) excavating a foundation pit; 2) assembling a reinforcement cage and foundation bolts into a rock foundation structure; 3) hoisting the rock foundation structure to the foundation pit; 4) enclosing the part of the rock foundation structure exposed out of the ground in a template; 5) and pouring foundation concrete into the foundation pit.
The foundation pit positioning device has the advantages that the reinforcement cage and the foundation bolts are used as a combined body for the first time, assembling and processing are carried out before the foundation pit is hoisted, and the foundation bolt positioning process is completed by the method of integrally adjusting and positioning the combined body for the first time. The efficiency of transmission line rock foundation mechanized construction has been promoted greatly, has guaranteed the key problem of foundation construction, and the accuracy of rag bolt location optimizes the positioning process. Meanwhile, the new steel reinforcement cage and foundation bolt combination can transmit upper load more reasonably, the foundation stress is more uniform, and the foundation bearing capacity is improved.
Drawings
The following is a brief description of the contents of each figure and the symbols in the figures in the description of the invention:
FIGS. 1 and 2 are schematic diagrams of basic structures;
the labels in the above figures are: 1. a reinforcement cage; 2. anchor bolts; 3. a foundation pit; 4. connecting reinforcing steel bars; 5. and (5) supporting the steel bars.
Detailed Description
Rock foundation structure suitable for transmission line construction includes steel reinforcement cage 1 and arranges rag bolt 2 in steel reinforcement cage 1 in, rotation angle in the plane is fixed a position rag bolt 2 when transferring through adjustment steel reinforcement cage 1, rag bolt 2 and steel reinforcement cage 1 integrated position through calculating in advance, control rag bolt 2 height, utilize connecting reinforcement 4 to be a body structure with steel reinforcement cage 1 and the welding of rag bolt 2, during the construction with rag bolt 2 through short reinforcement welding and steel reinforcement cage 1 combination together, wholly put into in the basis of excavating.
Different from the traditional construction process, the reinforcement cage 1 and the foundation bolt 2 are respectively placed and positioned. Through jointly assembling the reinforcement cage 1 and the foundation bolts 2, the capacity of hoisting machinery in the mechanized construction process is fully exerted, and meanwhile, the mechanized construction efficiency is improved. The collision of the foundation bolt 2 and the steel reinforcement cage 1 easily caused when the steel reinforcement cage 1 is hoisted and placed firstly and then the foundation bolt 2 is hoisted and placed is avoided in the traditional construction, so that the positioning is changed and is inaccurate. In addition, the foundation bolt 2 and the reinforcement cage 1 are combined and bound and fixed, so that the accuracy of the position distance between the foundation bolt 2 and the reinforcement cage 1 is ensured, the position of the foundation bolt 2 can be determined simultaneously only by fixing the position of the reinforcement cage 1, and the complexity of respectively positioning the reinforcement cage 1 and the foundation bolt 2 in the traditional construction method is eliminated. Through being connected rag bolt 2 and steel reinforcement cage 1, can also be better with the even transmission of the pull-up force of upper portion shaft tower structure to whole basis on, improve basic material's utilization efficiency, the change phase has improved basic bearing capacity.
As shown in fig. 1 and 2, in order to ensure the reliability of the connection between the reinforcement cage 1 and the anchor bolt 2, a plurality of layers of support bars 5, for example, 3-6 layers, are horizontally disposed in the reinforcement cage 1, where it is required to determine the height of the reinforcement cage 1, the support bars 5 are welded in the reinforcement cage 1, the anchor bolt 2 is packed on the support bars 5 through the connecting bars 4, and the support bars 5 are welded to the connecting bars 4.
Because rag bolt 2 includes the base and fixes the fixed column on the base, the central hole at 5 centers of the support reinforcing bar of bottom is less than the base, can utilize 5 supports rag bolt 2 of bottom support reinforcing bar, convenient fixed equipment, and other every layer of support reinforcing bar 5 centers are equipped with the centre hole that supplies the base to put into, conveniently puts into steel reinforcement cage 1 with rag bolt 2 is whole. In addition, for the convenience of steel reinforcement cage 1 in foundation ditch 3 location, slope when avoiding pouring, weld two-layer location branch outside steel reinforcement cage 1, every layer of location branch comprises the fixed metal pole that has an elastic component of three equal contained angles, every metal pole is along steel reinforcement cage 1 radial outside extension, metal pole tilt up and tip welding are on steel reinforcement cage 1, when putting into foundation ditch 3 with steel reinforcement cage 1 like this, can utilize many times location branch to fix its reliable in slightly being greater than steel reinforcement cage 1 diameter's foundation ditch 3.
The construction method based on the rock foundation structure comprises the following steps:
1) excavating a foundation pit 3;
2) calculating the relative positions of the foundation bolt 2 and the reinforcement cage 1 in advance according to a construction drawing, and assembling the reinforcement cage 1 and the foundation bolt 2 together according to the calculated result to form a rock foundation structure;
3) hoisting the rock foundation structure to the foundation pit 3;
4) enclosing the part of the rock foundation structure exposed out of the ground in a template;
5) and pouring foundation concrete into the foundation pit 3.
The invention is suitable for the rock excavation foundation of the power transmission line, the bottom and the four walls of the foundation pit 3 of the rock excavation foundation are made of rock, and the rock excavation foundation has higher strength and can support the weight of the combined binding body of the reinforcement cage 1 and the foundation bolt 2.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (1)
1. Rock foundation structure suitable for transmission line construction, including steel reinforcement cage and arrange the rag bolt in the steel reinforcement cage, its characterized in that: the reinforcement cage and the foundation bolt are welded into an integral structure through connecting reinforcements;
a plurality of layers of support steel bars are horizontally arranged in the steel bar cage, and the foundation bolts are welded on the support steel bars;
the foundation bolts are bundled on the support steel bars through the connecting steel bars, and the support steel bars are welded with the connecting steel bar supports;
the foundation bolt comprises a base and a fixed column fixed on the base, a central hole in the center of the support steel bar at the bottom layer is smaller than that of the base, and a central hole for placing the base is formed in the center of each layer of other support steel bars;
two layers of positioning support rods are welded outside the reinforcement cage, each layer of positioning support rod is composed of three metal rods which are fixed at equal included angles and provided with elastic pieces, each metal rod extends outwards along the radial direction of the reinforcement cage, the metal rods incline upwards, and the end parts of the metal rods are welded on the reinforcement cage;
a construction method of a rock foundation structure suitable for the construction of a power transmission line,
1) excavating a foundation pit;
2) assembling a reinforcement cage and foundation bolts into a rock foundation structure;
3) hoisting the rock foundation structure to the foundation pit;
4) enclosing the part of the rock foundation structure exposed out of the ground in a template;
5) and pouring foundation concrete into the foundation pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710077909.0A CN106836261B (en) | 2017-02-14 | 2017-02-14 | Rock foundation structure suitable for power transmission line construction and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710077909.0A CN106836261B (en) | 2017-02-14 | 2017-02-14 | Rock foundation structure suitable for power transmission line construction and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106836261A CN106836261A (en) | 2017-06-13 |
| CN106836261B true CN106836261B (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710077909.0A Active CN106836261B (en) | 2017-02-14 | 2017-02-14 | Rock foundation structure suitable for power transmission line construction and construction method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN106836261B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080270A (en) * | 2018-01-26 | 2019-08-02 | 中国电力科学研究院有限公司 | A kind of transmission line of electricity rock foundation construction method of basic skeleton integral hoisting |
| CN115419103A (en) * | 2022-10-19 | 2022-12-02 | 四川省送变电建设有限责任公司 | Power transmission line engineering foundation structure and construction method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0608068A1 (en) * | 1993-01-16 | 1994-07-27 | Gray Engineering Limited | Cage for reinforcing a concrete pile |
| CN101768960A (en) * | 2008-12-31 | 2010-07-07 | 新疆维吾尔自治区送变电工程公司 | Bored concrete pile construction method of permafrost layer |
| CN105544512A (en) * | 2015-12-21 | 2016-05-04 | 河海大学 | Reinforced sack grouting stone-breaking pile with heat transferring tube buried therein and construction method |
| CN106759448A (en) * | 2017-03-15 | 2017-05-31 | 中国能源建设集团江苏省电力设计院有限公司 | A kind of sunk type agricultural greenhouse photovoltaic bracket foundation structure and its construction method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10311047A (en) * | 1997-05-09 | 1998-11-24 | Nippon Steel Corp | Post positioning method and device for erecting plug-in type post |
| CN201770992U (en) * | 2010-07-22 | 2011-03-23 | 武汉一冶钢结构有限责任公司 | Foundation bolt positioning device |
| CN206693259U (en) * | 2017-02-14 | 2017-12-01 | 国网安徽省电力公司芜湖供电公司 | Suitable for the rock foundation structure of transmission line construction |
-
2017
- 2017-02-14 CN CN201710077909.0A patent/CN106836261B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0608068A1 (en) * | 1993-01-16 | 1994-07-27 | Gray Engineering Limited | Cage for reinforcing a concrete pile |
| CN101768960A (en) * | 2008-12-31 | 2010-07-07 | 新疆维吾尔自治区送变电工程公司 | Bored concrete pile construction method of permafrost layer |
| CN105544512A (en) * | 2015-12-21 | 2016-05-04 | 河海大学 | Reinforced sack grouting stone-breaking pile with heat transferring tube buried therein and construction method |
| CN106759448A (en) * | 2017-03-15 | 2017-05-31 | 中国能源建设集团江苏省电力设计院有限公司 | A kind of sunk type agricultural greenhouse photovoltaic bracket foundation structure and its construction method |
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| CN106836261A (en) | 2017-06-13 |
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