CN102720223A - Method for strengthening foundation of transmission line tower - Google Patents
Method for strengthening foundation of transmission line tower Download PDFInfo
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- CN102720223A CN102720223A CN2011100801294A CN201110080129A CN102720223A CN 102720223 A CN102720223 A CN 102720223A CN 2011100801294 A CN2011100801294 A CN 2011100801294A CN 201110080129 A CN201110080129 A CN 201110080129A CN 102720223 A CN102720223 A CN 102720223A
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- soil
- transmission line
- foundation
- cement paste
- vibration head
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Abstract
The invention relates to a construction method of a transmission line and particularly relates to a construction method of a foundation of a transmission line tower. A method for strengthening a foundation of a transmission line tower comprises the following steps of: step 1, deeply vibrating a vibration head in the soil, so that adjacent soil is compacted; step 2, after vibrating, filling gravels in a hole formed by the vibration head, so that gravel columns are formed; step 3, putting casing pipes with lengths same as an embedded depth of the foundation into the soil; and pressing cement paste prepared by cement and coal ash in the soil through slurry discharging openings at the lower parts of the casing pipes, so that the cement paste is extruded into the soil around the bottoms of the pipes and passes through any large gap of backfill soil. The method provided by the invention can be used for strengthening the foundation of the transmission line, so that the costs caused by power-cut construction in line improvement, reconstruction of a former line, and re-manufacture and re-installation of the transmission line tower can be saved.
Description
Technical field
The present invention relates to the job practices of transmission line of electricity, relate in particular to the electric power line pole tower foundation construction method.
Background technology
We usually adopt the method to existing circuit upgrading to solve the electric power transportation problem to load center.Adopting the way that increases the lead section, increases line voltage distribution or newly-increased transmission line of electricity to increase power transmission capacity of pow at original transmission line of electricity.And these measures all make the present pole and tower foundation of circuit will bear than original big load action, and must effectively handle pole and tower foundation like this increases its anti-pulling intensity.To satisfy the demand.
At present some conventional methods of adopting of China some areas are: mound around pole and tower foundation, or on pole and tower foundation concreting shell etc.Can increase the resistance to plucking ability on basis.But the anti-pulling insufficient strength, and influence the reason of environment, aspect such as attractive in appearance, obviously not good method.Therefore, research do not have a power failure and environmental protection or attractive in appearance on all be prone to accepted with the also lower underpin method of expense be necessity very.
Consider that original base has passed through long-term actual use, their pulling-resistant and pressure-resistant ability we can say to have enough overload capacity.If can more accurately confirm the weight bearing power that these are basic, obviously can save the improvement expenses of many circuit upgradings.When the basis needs significantly to increase supporting capacity, take the reinforcement means that suits, the expense that often can practice thrift track remodelling expense and interruption of power supply.
Summary of the invention
The present invention is intended to address the aforementioned drawbacks, and a kind of electric power line pole tower underpin method is provided.The present invention is through the consolidation process to transmission line of electricity basis, can save that track remodelling power cut construction, original circuit are constructed again, fabrication and installation electric power line pole tower expense again.
The present invention is achieved in that a kind of electric power line pole tower underpin method, and it comprises:
Step 1 is shaken vibration head deeply and to be buried near the regolith jolt ramming making;
Step 2 after vibration finishes, is inserted rubble in the hole that vibration head forms, make it form rubble post one by one;
Step 3; The sleeve pipe that some length are identical with embedded depth of foundation is squeezed in the soil; In soil, be pressed into the cement paste of cement and flyash preparation then through the bottom plasma discharge mouth of these sleeve pipes, it clamp-oned in the soil of pipe at the end, and be penetrated in any big space of backfill.
Described electric power line pole tower underpin method; Said step 1 also is included in the degree of depth that needs jolt ramming when big; With the moving head of vibration head lengthening by with axis of rotation that motor is connected on eccentric block form, during work, vibration head hangs over one movably on the arm of crane; One of which surface vibration one side is vertically descended, and the deadweight of dependence vibration head is progressively shaken in the ground.
Described electric power line pole tower underpin method, the process of said step 3 operation are in each pipe, to pump into cement paste successively earlier, increase pressure then gradually, till cement paste overflows from adjacent pipe.
Described electric power line pole tower underpin method, in the said step 3, before being pressed into cement paste, the upper end of steel pipe will seal with the stopper of ability distending.
The present invention through to surface compaction, impact compacting, vibratory compaction, slip casing by pressure, etc. method.The consolidation process on transmission line of electricity basis can save that track remodelling power cut construction, original circuit are constructed again, fabrication and installation electric power line pole tower expense again.
The specific embodiment
The supporting capacity of pole and tower foundation depends on the intensity and the compactness of soil around the basis, so one of the method for underpin is that backfill is strengthened or closely knit, and this just needs to differentiate and adopt a kind of suitable method.From this viewpoint, various soil stabilizations and the process densification method that uses in the builing industry is necessary to evaluate.Through to surface compaction, impact compacting, vibratory compaction, slip casing by pressure, etc. method.
At first with 38 centimetres of diameters, long 1.8 meters, nearly weigh 1.8 tons vibration head and shake deeply and bury near the regolith jolt ramming making.When the degree of depth that needs jolt ramming is big, can also with the moving head of vibration head lengthening by with axis of rotation that motor is connected on eccentric block form, motor can drive with miniature gasoline engine.During work, vibration head is to hang over one movably on the arm of crane, and one of which surface vibration one side is vertically descended, and relies on the deadweight of vibration head progressively to shake in the ground.After vibration finishes, in the hole that vibration head forms, insert rubble, make it form rubble post one by one.During general the construction, in graininess soil, do not need these rubble posts, but concerning pole and tower foundation, the rubble of increase can improve composition of the soil, its compactness is increased.
Then; Select diameter 15CM, the sleeve pipe that length is identical with embedded depth of foundation is squeezed in the soil, in soil, is pressed into the cement paste of cement and flyash preparation then through the bottom plasma discharge mouth of these sleeve pipes; It is clamp-oned in the soil of pipe at the end, and be penetrated in any big space of backfill.The process of operation is in each pipe, to pump into cement paste successively earlier, increases pressure then gradually, till cement paste overflows from adjacent pipe.During pressurization, the upper end of steel pipe will seal with the stopper of ability distending, so that cement paste can the degree of depth infiltrate in the soil.Just can extract sleeve pipe in 3 ~ 4 hours after the slip casting, and cement paste is stayed in the soil.When Grouting Pipe was driven underground, the backfill vibratory compaction can improve the sealing between Grouting Pipe and backfill, thereby can use higher grouting pressure, made it on the sole plate horizontal plane, form the concrete column piece.The needed construction machinery of slip casing by pressure is light-duty and movably.
Behind jolt ramming and mud jacking, generally all can make typical pole and tower foundation reinforce the actual anti-uplift force in back increases by 30% ~ 60%.It is better in the backfill of pine, to improve effect.Because densified near the backfill at face of land place, therefore the basis ability of bearing lateral force also can increase.
Claims (4)
1. electric power line pole tower underpin method is characterized in that it comprises:
Step 1 is shaken vibration head deeply and to be buried near the regolith jolt ramming making;
Step 2 after vibration finishes, is inserted rubble in the hole that vibration head forms, make it form rubble post one by one;
Step 3; The sleeve pipe that some length are identical with embedded depth of foundation is squeezed in the soil; In soil, be pressed into the cement paste of cement and flyash preparation then through the bottom plasma discharge mouth of these sleeve pipes, it clamp-oned in the soil of pipe at the end, and be penetrated in any big space of backfill.
2. electric power line pole tower underpin method according to claim 1; It is characterized in that said step 1 also is included in the degree of depth that needs jolt ramming when big, with the moving head of vibration head lengthening by with axis of rotation that motor is connected on eccentric block form; During work; Vibration head hangs over one movably on the arm of crane, and one of which surface vibration one side is vertically descended, and relies on the deadweight of vibration head progressively to shake in the ground.
3. electric power line pole tower underpin method according to claim 1 is characterized in that, the process of said step 3 operation is in each pipe, to pump into cement paste successively earlier, increases pressure then gradually, till cement paste overflows from adjacent pipe.
4. according to claim 1 or 3 described electric power line pole tower underpin methods, it is characterized in that in the said step 3, before being pressed into cement paste, the upper end of steel pipe will seal with the stopper of ability distending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100801294A CN102720223A (en) | 2011-03-31 | 2011-03-31 | Method for strengthening foundation of transmission line tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100801294A CN102720223A (en) | 2011-03-31 | 2011-03-31 | Method for strengthening foundation of transmission line tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102720223A true CN102720223A (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100801294A Pending CN102720223A (en) | 2011-03-31 | 2011-03-31 | Method for strengthening foundation of transmission line tower |
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| CN (1) | CN102720223A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266620A (en) * | 2013-05-16 | 2013-08-28 | 国家电网公司 | Method for assembling electric transmission lines through coal gangue area towers |
| CN104532869A (en) * | 2014-12-08 | 2015-04-22 | 国家电网公司 | Method used for improving anti-pulling performance of power transmission line tower foundation in drift sand region |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256573A (en) * | 2001-03-02 | 2002-09-11 | Chubu Electric Power Co Inc | Foundation for existing foundation reinforcing steel tower and construction method for it |
| CN200999346Y (en) * | 2006-09-15 | 2008-01-02 | 刘海峰 | Fully steel-made universal reinforced type pole tower pile |
| KR20090025776A (en) * | 2007-09-07 | 2009-03-11 | 성우전자(주) | Steel pole tower for mobile communication and method for construction thereof |
| CN101538868A (en) * | 2009-02-06 | 2009-09-23 | 青海省电力设计院 | Everfrost and saline soil region transmission line pole glass fiber reinforced plastic foundation construction method |
-
2011
- 2011-03-31 CN CN2011100801294A patent/CN102720223A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256573A (en) * | 2001-03-02 | 2002-09-11 | Chubu Electric Power Co Inc | Foundation for existing foundation reinforcing steel tower and construction method for it |
| CN200999346Y (en) * | 2006-09-15 | 2008-01-02 | 刘海峰 | Fully steel-made universal reinforced type pole tower pile |
| KR20090025776A (en) * | 2007-09-07 | 2009-03-11 | 성우전자(주) | Steel pole tower for mobile communication and method for construction thereof |
| CN101538868A (en) * | 2009-02-06 | 2009-09-23 | 青海省电力设计院 | Everfrost and saline soil region transmission line pole glass fiber reinforced plastic foundation construction method |
Non-Patent Citations (1)
| Title |
|---|
| 余自强: "输电线路杆塔基础加固的两种方法", 《江西电力》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266620A (en) * | 2013-05-16 | 2013-08-28 | 国家电网公司 | Method for assembling electric transmission lines through coal gangue area towers |
| CN103266620B (en) * | 2013-05-16 | 2015-09-16 | 国家电网公司 | Transmission line of electricity is through the method for assembling of coal gangue area shaft tower |
| CN104532869A (en) * | 2014-12-08 | 2015-04-22 | 国家电网公司 | Method used for improving anti-pulling performance of power transmission line tower foundation in drift sand region |
| CN104532869B (en) * | 2014-12-08 | 2017-01-11 | 国家电网公司 | Method used for improving anti-pulling performance of power transmission line tower foundation in drift sand region |
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Application publication date: 20121010 |