CN202595756U - Piled raft foundation structure of narrow-base power transmission tower - Google Patents
Piled raft foundation structure of narrow-base power transmission tower Download PDFInfo
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- CN202595756U CN202595756U CN 201220133820 CN201220133820U CN202595756U CN 202595756 U CN202595756 U CN 202595756U CN 201220133820 CN201220133820 CN 201220133820 CN 201220133820 U CN201220133820 U CN 201220133820U CN 202595756 U CN202595756 U CN 202595756U
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Abstract
The utility model relates to a piled raft foundation structure of a narrow-base power transmission tower. The piled raft foundation structure consists of a raft plate and a load pile, wherein the upper surface of the raft plate is connected with a bottom pin of the narrow-base power transmission tower, and the load pile is connected with the lower surface of the raft plate. Compared with the prior art, the piled raft foundation structure has the advantages that the load pile and the raft plate are combined for bearing the load of the power transmission tower, the foundation stability and reliability are enhanced, the overturn resistance performance is enhanced through the bearing effect of the raft plate, so the pile number is reduced, the load pile directly transfers partial load into the bottom layer undisturbed soil, the bearing force of filling soil is fully utilized, and the reliable bearing capability of the bottom layer undisturbed soil is also realized; and obvious characteristics and superiorities are realized in aspects of combined stress, safety, stability, economy and applicability.
Description
Technical field
The utility model relates to a kind of power transmission tower piling strtucture, especially relates to a kind of narrow basic power transmission tower pile-raft foundation structure.
Background technology
Along with steady development of economy; Power demand increases year by year; National grid construction development is accelerated comprehensively; The transmission line length of having built up is from 513903 kilometers of developing into 2008 of 326215 kilometers in 2004, wherein 2005 to 2008 newly-built 55549,31455,43885,56799 kilometers respectively.To in December, 2009, obtain 500kV and the above transmission of electricity project that National Development and Reform Committee approves the construction of and just reach 58.
Along with the construction of China's extra-high voltage grid and with the applying of transmission of electricity new technologies such as many loop lines of tower road, compact line, large-section lead, the trend of the big load of electric power line pole tower, maximization is more obvious.The construction of " resource-conserving, environmentally friendly " society, the security and stability of big electrical network, the complicated unusual security reliability to tower structure of climate change, economy, environmental-protecting performance etc. are all had higher requirement, and transmission line tower structure research is faced with new challenges.
In recent years, along with rapid economic development, constantly widen in the city, and power grid construction has also obtained development fast, and the large capacity transmission project occurs in succession.In actual engineering construction, the construction of trolley line tends to run into the problem of a lot of reality, and particularly circuit corridor problem is more and more outstanding, mainly contains the following aspects:
(1) needs of urban planning.In the urban construction, peripheral in the urban district especially, urban planning is increasingly high to view and environmental requirement, and is also more and more stricter to the restriction in trolley line corridor.The path of planning in the urban planning generally speaking, is the unique path of construction power circuit and must be strict controlled in the width of corridor of planning.Some areas width of corridor is little than regular situation, and the floor space of shaft tower, tower head size etc. have been proposed specific (special) requirements.
(2) improve overhead wire corridor unit width transmission capacity.Needs along with the urban distribution network construction; Usually can utilize the 110kV overhead wire to carry out boosting and transformation and be the 220kV overhead wire; And planning department often requires corridor Safe width strictness to be limited in the scope of original 110kV corridor; Do not increase again under the situation of feeder number neither increasing width of corridor, improve transmission capacity.
(3) narrow and small, the conventional iron tower in space, place, tower position can't be built.Tend to run into the restriction of a lot of special circumstances in the construction; Such as orographic condition restriction, existing structure condition restriction, surrounding enviroment restriction etc.; It is very limited or even be significantly smaller than the arrangement space of conventional iron tower to place the space on iron tower and basis; In order not incur loss through delay the transmission line construction duration, must take Corresponding Countermeasures to solve the narrow and small problem in space, thereby ensure the engineering construction smooth implementation.
(4) damages sharply raises.In populous, positive developed regions, removal expense, compensation for crops etc. is risen sharply, and handles the corridor expense and accounts for the lasting rising of total cost ratio.
(5) previous work difficulty.Conventional iron tower floor space is bigger, and the house of often need removing causes that previous work pressure is big, engineering construction is slow.
For carrying out smoothly of power construction, must solve the problem that these run into, method commonly used at present has:
(1) lays high voltage power cable.The path of power cable is underground, and is smaller to the influence of surrounding enviroment and plot exploitation, but lay high voltage power cable following problem arranged also:
A, cost are very expensive.The cost that lays a 220kV high voltage power cable is 4～8 times of trolley line that set up equal electric pressure.
B, underground space resource be growing tension also.Water supply pipe in the circuit corridor, gas flue, telecommunication cable pipeline etc. also make underground space resource also face the situation of growing tension.
C, cable run are difficult for change and branch.The manufacturing process requirement of cable connector annex is high, expense is high.
The survey of d, fault is sought and keeps in repair difficult, needs special installation and specific start-up to operate.
(2) adopt steel pipe pole.For conditional shaft tower position, Li Ta place, adopting steel pipe pole also is the conventional selection of comparison.Steel pipe pole adopts the polygonal cross-section pattern, and floor space is less, but uses steel pipe pole that following problem is also arranged:
A, service condition are restricted.Under typical normal tension, single steel pipe pole is common to be used under straight line and the little corner situation of straight line, then need make the pattern of two bars, four bars for the angle tower of wide-angle, terminal tower etc.
B, construction costs height.Under identical span and the tension force situation, the weight of single pole straight line steel pipe pole generally is about 2 times of tangent tower weight, and the steel using amount of steel pipe pile is bigger simultaneously, is generally about 1/3 of single pole steel pipe pole weight; The weight of two bars, four bars then is about 3～4 times of iron tower under the square one.
C, compare with iron tower and to be unfavorable for operation maintenance.Steel pipe pole processing transport difficulty is big, the upright heavy mechanical equipment, high to the job site environmental requirement that needs of group.
Under this background, the narrow basic iron tower that research and design have advantages such as dwindling the circuit corridor, save the area just seems particularly urgent and necessary, and narrow basic iron tower has following characteristics:
1) can effectively compress the circuit corridor, save the area; Can be used for land resources anxiety and the less area of circuit width of corridor, do not influencing transmission capacity or partly improving under the situation of transmission capacity, the compression line width reduces the influence to surrounding environment, is beneficial to the strategy of national sustainable development.
2) applicability is strong.Particularly can be used for because of ambient conditions limits the area that conventional line is difficult to pass through, like residential block and transmission of electricity narrow and small area, corridor, metropolis.
3) have that the processing of common iron tower, transportation are easy to assembly, operation maintenance advantage easily;
4) compare with steel pipe pole, cost is lower, and have the steel pipe single pole take up an area of little, the busy line corridor is little, the advantage of better appearance.
Therefore, the narrow basic iron tower development and application research of 220kV, construction and social effect to transmission line of electricity have important value.
The utility model content
The purpose of the utility model is exactly in order to overcome the defective that above-mentioned prior art exists a kind of basic stability and reliability of having strengthened to be provided, and has made full use of the narrow basic power transmission tower pile-raft foundation structure of the bearing capacity of the bearing capacity that bankets and bottom undisturbed soil.
The purpose of the utility model can realize through following technical scheme:
A kind of narrow basic power transmission tower pile-raft foundation structure is made up of raft plate and load stake, and the upper surface of described raft plate is connected with the footing of narrow basic power transmission tower, and described load stake is connected the soffit of raft plate.
The upper surface of described raft plate is provided with the protruding end, and this protruding end connects the footing of narrow basic power transmission tower.
Described load stake is provided with 16, is evenly distributed on the soffit of raft plate.
Compared with prior art; The utility model is united the load that carries power transmission tower through load stake and raft plate, has strengthened basic stability and reliability, because the carrying effect of raft plate has strengthened the overturning or slip resistance analysis performance; Thereby reduced the quantity of stake; The load stake is directly delivered to fractional load in the bottom undisturbed soil again, has both made full use of the bearing capacity that bankets, and has brought into play the reliable supporting capacity of bottom undisturbed soil again; Aspect stressed, safety and stability of associating and economic serviceability, have tangible characteristics and superiority.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of looking up of the utility model.
1 is that raft plate, 2 is that load stake, 3 is narrow basic power transmission tower among the figure.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
A kind of narrow basic power transmission tower pile-raft foundation structure; Its structure is made up of raft plate 1 and load stake 2 shown in Fig. 1-2, and the upper surface of raft plate 1 is provided with the protruding end; This protruding end connects the footing of narrow basic power transmission tower 3; Load stake 2 is connected the soffit of raft plate 1, is provided with 16 altogether, is evenly distributed on the soffit of raft plate 1.
The utility model has strengthened basic stability and reliability, because the carrying effect of raft plate 1 has strengthened the overturning or slip resistance analysis performance, thereby has reduced the quantity of load stake 2.And load stake 2 is directly delivered to fractional load in the bottom undisturbed soil.So the stake raft foundation is compared with single pile basis, flexible slab foundation, has both made full use of the bearing capacity that bankets, and has brought into play the reliable supporting capacity of bottom undisturbed soil again; Aspect stressed, safety and stability of associating and economic serviceability, have tangible characteristics and superiority.
Claims (3)
1. one kind narrow basic power transmission tower pile-raft foundation structure is characterized in that, this foundation structure is made up of raft plate and load stake, and the upper surface of described raft plate is connected with the footing of narrow basic power transmission tower, and described load stake is connected the soffit of raft plate.
2. a kind of narrow basic power transmission tower pile-raft foundation structure according to claim 1 is characterized in that the upper surface of described raft plate is provided with the protruding end, and this protruding end connects the footing of narrow basic power transmission tower.
3. a kind of narrow basic power transmission tower pile-raft foundation structure according to claim 1 is characterized in that, described load stake is provided with 16, is evenly distributed on the soffit of raft plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220133820 CN202595756U (en) | 2012-03-31 | 2012-03-31 | Piled raft foundation structure of narrow-base power transmission tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220133820 CN202595756U (en) | 2012-03-31 | 2012-03-31 | Piled raft foundation structure of narrow-base power transmission tower |
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| Publication Number | Publication Date |
|---|---|
| CN202595756U true CN202595756U (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220133820 Expired - Lifetime CN202595756U (en) | 2012-03-31 | 2012-03-31 | Piled raft foundation structure of narrow-base power transmission tower |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696611A (en) * | 2013-12-03 | 2014-04-02 | 新安县电业公司 | Base structure for steel tube tower |
| 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 |
| CN105951537A (en) * | 2016-04-29 | 2016-09-21 | 中铁第四勘察设计院集团有限公司 | Rib column distributed turnout foundation structure of middle-low speed magnetic levitation low-arranged line |
| CN114809065A (en) * | 2022-04-13 | 2022-07-29 | 中国能源建设集团江苏省电力设计院有限公司 | Power transmission tower foundation structure and construction method |
| CN117758882A (en) * | 2023-12-28 | 2024-03-26 | 江苏明立杆塔有限公司 | Shock-proof structure and method for power transmission tower |
-
2012
- 2012-03-31 CN CN 201220133820 patent/CN202595756U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696611A (en) * | 2013-12-03 | 2014-04-02 | 新安县电业公司 | Base structure for steel tube tower |
| 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 |
| CN104499501B (en) * | 2014-12-08 | 2017-02-22 | 国家电网公司 | Narrow-foundation-tower single-pile pier-type self-stabilized foundation for power transmission line |
| CN105951537A (en) * | 2016-04-29 | 2016-09-21 | 中铁第四勘察设计院集团有限公司 | Rib column distributed turnout foundation structure of middle-low speed magnetic levitation low-arranged line |
| CN105951537B (en) * | 2016-04-29 | 2017-10-03 | 中铁第四勘察设计院集团有限公司 | A kind of medium-and low-speed maglev is low to put circuit rib post distributing track switch foundation structure |
| WO2017185905A1 (en) * | 2016-04-29 | 2017-11-02 | 中铁第四勘察设计院集团有限公司 | Ribbed column distributed turnout foundation structure for low-set mid-to-low speed magnetic levitation line |
| CN114809065A (en) * | 2022-04-13 | 2022-07-29 | 中国能源建设集团江苏省电力设计院有限公司 | Power transmission tower foundation structure and construction method |
| CN117758882A (en) * | 2023-12-28 | 2024-03-26 | 江苏明立杆塔有限公司 | Shock-proof structure and method for power transmission tower |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |
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| CX01 | Expiry of patent term |