CN114250778A - Method for anchoring middle anti-pulling ring electric tower foundation pit - Google Patents
Method for anchoring middle anti-pulling ring electric tower foundation pit Download PDFInfo
- Publication number
- CN114250778A CN114250778A CN202011036543.0A CN202011036543A CN114250778A CN 114250778 A CN114250778 A CN 114250778A CN 202011036543 A CN202011036543 A CN 202011036543A CN 114250778 A CN114250778 A CN 114250778A
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- China
- Prior art keywords
- foundation pit
- pulling
- pit
- ring
- electric tower
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- 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.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004873 anchoring Methods 0.000 title abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect 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
- 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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Foundations (AREA)
Abstract
The method for anchoring a foundation pit with a middle pulling-resistant ring and an electric tower discloses a method for placing the pulling-resistant ring in the middle of the foundation pit and reinforcing the pulling-resistant ring by using an anchor rod. Firstly, digging a foundation pit to the middle part, properly manufacturing a retaining wall at the upper section 1 of the foundation pit, and nailing an anchor rod 2 at the bottom. Then, the four-point expansion is carried out to form the anti-pulling ring 3. And then digging the lower section 4 of the foundation pit. Upper section h12m high; height h of anti-pulling ring21m, and the depth b of the pit is 1 m; lower segment depth h3According to the design of the installed electric tower. The usage amount of the wall protection concrete is reduced by 20 percent, and the usage amount of the reinforcing steel bar is reduced by 12 percent; the construction is safe, and the difficulty is reduced; the construction period is short. The method is used for foundation engineering of the electric tower.
Description
Technical Field
A method for placing an anti-pulling ring in an anchored foundation pit of an electric tower relates to the electric power engineering construction technology, in particular to a method for placing an anti-pulling ring in the middle of the foundation pit of the tower.
Background
The existing foundation pit of the electric tower is shaped like a cylindrical straight pit, and the bottom of the straight pit is provided with an annular uplift-resistant ring protruding into the pit wall. The manual digging has the advantages of simple apparatus, convenient construction, small vibration, quick construction, low cost and the like, the engineering application is common, and particularly, in rugged hilly and mountainous areas with inconvenient traffic, mechanical equipment is difficult to reach, and manual digging has to be adopted. Practice shows that when the deep foundation pit is expanded to form the uplift-resistant ring, accidents that the pit wall collapses to endanger the safety of workers are increasingly appeared. The uplift ring has the functions of electric tower uplift resistance, tower weight support and tower body inclination resistance, and the design of pit depth should comprehensively consider the 'uplift resistance, load bearing, overturn resistance' and 'construction safety and convenience'.
Disclosure of Invention
The technical problem to be solved by the method for anchoring the foundation pit of the mid-set anti-pulling coil electric tower is as follows: the hidden trouble that the pit wall collapses caused by the construction of the anti-pulling ring arranged at the bottom of the pit is avoided.
The technical scheme is as follows: the bottom anti-pulling ring moves to the middle part of the foundation pit and is anchored.
The method for anchoring the foundation pit of the mid-positioned anti-pulling coil electric tower (shown in figure 1) comprises the following steps:
And 2, according to the soil hardness degree above the middle part of the foundation pit, taking the pit wall above the middle part as a retaining wall as appropriate.
And 3, uniformly nailing a group of anchor rods 2 into the vertical pit wall at the bottom of the upper section 1 of the foundation pit so as to prevent the cliff of the uplift-resistant ring 3 from collapsing.
And 4, performing four-expansion on the middle part to form an anti-pulling ring 3.
And 5, after the fourth expansion is performed to form the pulling-resistant ring 3, continuously using a mechanical Luoyang shovel to dig to the full depth of the foundation pit. And the lower section 4 of the foundation pit below the anti-pulling ring 3 is omitted as a protective wall. But according to the geological actual condition of the foundation pit and the foundation acting force, the diameter a and the depth h3 of the foundation pit under the uplift resistant ring 3 can be adjusted.
The beneficial effects of the method for anchoring the foundation pit of the centrally-mounted anti-pulling coil electric tower are as follows: firstly, the anti-pulling ring 3 moves from the bottom of the foundation pit to the middle part, so that the wall protection material consumption is reduced, and the concrete consumption is saved by 20 percent and the reinforcing steel bar consumption is saved by 12 percent; secondly, the upper section of the foundation pit is only 2m, and the anchor rod 2 and the retaining wall are used for protection, so that the hidden danger of personal accidents caused by pit wall collapse is avoided, and the construction safety is ensured. Even if the upper section 1 of the pit wall is accidentally collapsed, the height is only 2m, so that a serious accident of people burying cannot be caused. And thirdly, the construction difficulty is reduced, and the construction period is shortened.
Drawings
FIG. 1 is a schematic diagram of the shape of an anchoring mid-positioned anti-pulling-out coil electric tower foundation pit.
In the figure: 1-upper section; 2-anchor rod; 3-pulling-resistant ring; 4-lower section; a-the diameter of the foundation pit; b, deeply penetrating the bottom of the anti-pulling ring; h is1-upper section depth; h is2-a pull-out resistance loop height; h is3Lower section deep.
Detailed Description
Referring to FIG. 1, a preferred mode of carrying out the above method is detailed as follows:
height h of upper section of foundation pit 12 m. Height h of anti-pulling ring 21 m; the bottom of the anti-pulling ring penetrates into the pit wall to a depth b of 1 m. The diameter a of the foundation pit and the depth h3 of the lower section are designed according to the installed electric tower. The anchor rod 2 is 500mm long, 10mm in diameter and is provided with a disc head and a tip tail.
Claims (2)
1. Put resistance to plucking circle electricity tower foundation ditch way in the anchor, characterized by: step 1, digging a foundation pit to the middle part of a pit body by adopting a mechanical Luoyang shovel; 2. according to the degree of soil hardness above the middle part of the foundation pit, taking the pit wall above the middle part as a retaining wall as appropriate; 3. a group of anchor rods (2) are uniformly nailed into the upper section (1) of the foundation pit and vertical to the pit wall; 4. the middle part is expanded to form an anti-pulling ring (3); 5. after the four-hole expansion forms the pulling-resistant ring (3), the mechanical Luoyang shovel is continuously used for digging to the full depth of the foundation pit, and the lower section (4) of the foundation pit below the pulling-resistant ring (3) is saved as a protective wall.
2. The method for manufacturing the foundation pit of the anchored mid-positioned anti-pulling coil electric tower as claimed in claim 1, wherein the method comprises the following steps: height h of upper section of foundation pit12 m; height h of anti-pulling ring21m, the bottom of the anti-pulling ring penetrates into the pit wall to a depth b of 1 m; the diameter a of the foundation pit and the depth h3 of the lower section are designed according to the installed electric tower. The method for manufacturing the foundation pit of the anchored mid-positioned anti-pulling coil electric tower as claimed in claim 1, wherein the method comprises the following steps: the anchor rod (2) is 500mm long, 10mm in diameter and is provided with a disc head and a tip tail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036543.0A CN114250778A (en) | 2020-09-23 | 2020-09-23 | Method for anchoring middle anti-pulling ring electric tower foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036543.0A CN114250778A (en) | 2020-09-23 | 2020-09-23 | Method for anchoring middle anti-pulling ring electric tower foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114250778A true CN114250778A (en) | 2022-03-29 |
Family
ID=80790790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011036543.0A Pending CN114250778A (en) | 2020-09-23 | 2020-09-23 | Method for anchoring middle anti-pulling ring electric tower foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114250778A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009007844A (en) * | 2007-06-28 | 2009-01-15 | Kyushu Dengi Kaihatsu Kk | Inverted t-shape foundation and its constructing method, and power transmission steel tower system |
| CN101446088A (en) * | 2008-11-11 | 2009-06-03 | 中国电力科学研究院 | Construction method for pole and tower foundation in Gobi Desert gravelly soil area |
| CN102912798A (en) * | 2012-11-06 | 2013-02-06 | 山东兴华建设集团有限公司 | Compound soil nail wall foundation pit supporting method |
| CN203947468U (en) * | 2014-06-30 | 2014-11-19 | 河北省电力勘测设计研究院 | A kind of Near Ground place expands the compacted bearing disk pile of section |
| CN104499501A (en) * | 2014-12-08 | 2015-04-08 | 国家电网公司 | Narrow-foundation-tower single-pile pier-type self-stabilized foundation for power transmission line |
-
2020
- 2020-09-23 CN CN202011036543.0A patent/CN114250778A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009007844A (en) * | 2007-06-28 | 2009-01-15 | Kyushu Dengi Kaihatsu Kk | Inverted t-shape foundation and its constructing method, and power transmission steel tower system |
| CN101446088A (en) * | 2008-11-11 | 2009-06-03 | 中国电力科学研究院 | Construction method for pole and tower foundation in Gobi Desert gravelly soil area |
| CN102912798A (en) * | 2012-11-06 | 2013-02-06 | 山东兴华建设集团有限公司 | Compound soil nail wall foundation pit supporting method |
| CN203947468U (en) * | 2014-06-30 | 2014-11-19 | 河北省电力勘测设计研究院 | A kind of Near Ground place expands the compacted bearing disk pile of section |
| CN104499501A (en) * | 2014-12-08 | 2015-04-08 | 国家电网公司 | Narrow-foundation-tower single-pile pier-type self-stabilized foundation for power transmission line |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220329 |