CN201077991Y

CN201077991Y - Wind power generator foundation structure used for mudflat area

Info

Publication number: CN201077991Y
Application number: CN 200720112818
Authority: CN
Inventors: 孙杏建; 俞华锋; 黄春林; 陶铁铃
Original assignee: Hydrochina East China Engineering Corp
Current assignee: Hydrochina East China Engineering Corp
Priority date: 2007-07-31
Filing date: 2007-07-31
Publication date: 2008-06-25
Anticipated expiration: 2017-07-31

Abstract

The utility model relates to a foundation structure of a wind driven generator used at the intertidal zone. The utility model is required to solve the technology problem of providing a foundation structure of a wind driven generator which can well resist the corrosion from underground water, is cheap, easy to construct, has short construction period, and is used at the intertidal zone. The utility model adopts the technology proposal for solving the problem that the utility model is characterized in that the foundation structure adopts a plurality of circles of high-strength prestressed concrete tubular pile groups which are arranged in annular way; the number of the rings is at least two, but not more than 5, and the length of the pile at the outer circle is larger than that at the inner circle. The foundation structure is applicable for treating the foundation of the wind-driven generator installed at the intertidal zone.

Description

The wind driven generator base structure that is used for the beach area

Technical field

The utility model relates to a kind of wind driven generator base structure that is used for the beach area.Be applicable to the basis of the wind-driven generator that is installed in the beach area is handled.

Background technology

In China, the wind-power electricity generation industry is an emerging industry.Last century, the eighties rose, and China's introduction of foreign technology is Construction of Wind farm at home progressively, after 2000, because country encourages the development and utilization to regenerative resource, domestic wind-power electricity generation industry was developed rapidly.

Up to the present, China in the Inner Mongol, Xinjiang, Hebei and the coastal region in east China built up large quantities of wind power plants.Because the beach area has abundant, the characteristics such as landform is wide, local economy prosperity of wind-resources, so will build more wind power plant in the beach area of China from now on.But beach area Construction of Wind farm with on western grassland and mountain region different characteristics are arranged, the beach area all is the soft foundation of mucky soil or powder sandy soil generally, bearing capacity of foundation soil is very low, the beach area generally all is the salt-soda soil in addition, surface water and phreatic water contain a large amount of sulfate ions and chlorion, the water that contains a large amount of sulfate ions and chlorion to concrete, reinforcing bar and steel all be have corrosive, so the wind driven generator base in beach area will be to be different from western grassland or mountain region type.

Wind driven generator base generally has two kinds of concrete spread footing and pile foundations.Past is on western grassland and mountain region when building wind energy turbine set, all adopt concrete spread footing, and in beach area Construction of Wind farm, because construction experiences is few, still do not find a kind of cheapness, reliable based process form, other mudflat wind electric field that has built up at present, what adopt is bored concrete pile technology, though solved the problem of soft foundation, do not solve the underground water corrosion problems, and have the too high shortcoming of cost.

Summary of the invention

The technical problems to be solved in the utility model is: a kind of phreatic corrosivity that can be good at resisting is provided, and the short wind driven generator base structure that is used for the beach area of cheapness, easy construction, duration.

The technical scheme that the utility model adopted is: be used for the wind driven generator base structure in beach area, it is characterized in that described foundation structure is the high-strength prestressed concrete pipe pile group that multi-ring annular is arranged; Its annular number of turns is 2 circles at least, is no more than 5 circles at most, and the length of outer ring stake is greater than the inner ring stake.

Described high-strength prestressed concrete pipe pile external diameter 500-700mm, wall thickness 110-150mm, strength grade of concrete C80, and be equipped with prestressed reinforcement.

The beneficial effects of the utility model are: (1) high-strength prestressed concrete pipe pile adopts C80 high-strength concrete and high-strength prestressed reinforcing bar, and in factory process, stream curing, so the pile strength height, quality is guaranteed.Because pile concrete has just had compressive pre-stress after pile body machines, and in squeezing into process and in the use later on, compressive pre-stress can not disappear, so pile body generally can not produce the crack, this makes underground water can not pass through crevice corrosion pile body reinforcing bar; (2) resistance of chloride ion penetration of high-strength concrete itself is better, and the performance of concrete itself also can well be resisted the corrosion of chlorion to reinforcing bar; (3) content of tricalcium aluminate in the restriction cement, the content of tricalcium aluminate is limited between 6～12% in the cement, the corrosion of sulfate ion in the opposing underground water that the cement of this content can be best, the while is not reduced the ability of resisting corrosion of chlorine ion again;

After adopting this structure, the differential settlement of wind driven generator base and horizontal movement can meet the demands, and can well resist phreatic corrosivity, and have cheapness, easy construction, short advantage of duration.

Description of drawings

Fig. 1 is a foundation plan of the present utility model.

Fig. 2 is a basic sectional drawing of the present utility model.

The specific embodiment

As shown in Figure 1 and Figure 2, the described foundation structure of present embodiment is the 4 high-strength prestressed concrete pipe pile groups that are circular layout of circle, and inner ring diameter is

4300mm, uniform 3 root canal piles; Outwards the diameter of several the 2nd circles is from the lining

8200mm, uniform 7 root canal piles; The diameter of the 3rd circle is

13000mm, uniform 16 root canal piles; The 4th circle, just the diameter of outmost turns is

17800mm is evenly equipped with 24 root canal piles, and promptly this routine blower foundation is established 50 root canal piles 1 altogether.Long stake is adopted in the outer ring stake, requires the vertical deformation of its bearing capacity all less, and the outer ring stake is used to prevent basic slope; Short stake is adopted in the inner ring stake, mainly is to utilize quantity, also stops the horizontal movement on basis.The long general geological condition of stake according to the residing beach of wind driven generator base area, the size of wind-powered electricity generation unit and deciding, because high-strength prestressed concrete pipe pile (being called for short the PHC stake) adopts prefabrication, the longest 15m of single hop length, transport to the welding of on-the-spot back, so the PHC stake can sectional making, physical length needs decide because of the scene.

This routine PHC stake external diameter 600mm, wall thickness 130mm, strength grade of concrete C80, and be equipped with prestressed reinforcement, the longest 15m of single hop length.

During construction, adopt the piling of D80 paddle type mill pile driver.Should select the pile cover and the liner that suit during the hammering method pile.The pile cover internal diameter should be greater than stake footpath 20～30mm, and its degree of depth is 300～400mm, and steam vent should be arranged.Pallet between hammer and the pile cover can be used vertical hardwood, and thickness is 150～200mm; Must embed the liner of high resilience toughness between pile cover and the stake top, as the paper washer of adequate thickness, wooden splint and rubber etc., to reduce the breakage of pile crown, the thickness after the liner hammering is preferably 120～150mm.When liner is beaten hard or burnt, should in time change.During pile sinking, be full of water, can carry out the hammering operation after should draining as hole of post.The pile monkey of pile body, pile cover, pile follower should be on same center line, and waterproof is beaten partially.The appropriate to the occasion weight of hammer piling is low to be hit, and begins to fall apart from less, falls on request apart from carrying out after wait to bury certain depth and pile body are stable again.

Lay a pile after having beaten a pile, beaten until the whole down stakes of blower foundation, so far the blower foundation pile foundation is finished, and can build top base concrete 2 after static a period of time and wind-powered electricity generation unit 3 is installed, the following pre-buried cable conduit 4 and the pre-buried gutter 5 of wind-powered electricity generation unit, as shown in Figure 2.

Claims

1. wind driven generator base structure that is used for the beach area is characterized in that: described foundation structure is the high-strength prestressed concrete pipe pile group that multi-ring annular is arranged; Its annular number of turns is 2 circles at least, is no more than 5 circles at most, and the length of outer ring stake is greater than the inner ring stake.

2. the wind driven generator base structure that is used for the beach area according to claim 1 is characterized in that: described high-strength prestressed concrete pipe pile (1) external diameter 500-700mm, and wall thickness 110-150mm, strength grade of concrete C80, and be equipped with prestressed reinforcement.