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Prefabricated prestressed cylinder type open caisson fan foundation and construction method

A wind turbine foundation and prestressing technology, which is applied in basic structure engineering, installation/support of wind turbine configuration, wind power generation, etc., can solve the problems of small cross-sectional area of ​​the inner cylinder of the foundation, poor anti-settling effect, and high construction requirements. Achieve the effects of saving construction period, high reinforcement efficiency and wide application range

Pending Publication Date: 2020-09-08
TONGJI UNIV ARCHITECTURAL DESIGN INST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent uses an integrated foundation outer cylinder and foundation inner cylinder. After the foundation outer cylinder and the foundation inner cylinder are completely erected, they are pressed into the center of the foundation through a high-frequency vibrating hammer. The length of the foundation outer cylinder and the foundation inner cylinder is too long. The construction process is prone to damage or defects. At the same time, the construction requirements are high, and it is not conducive to transportation. In addition, the cross-sectional area of ​​the inner cylinder of the foundation is small, and the anti-settling effect is not good

Method used

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  • Prefabricated prestressed cylinder type open caisson fan foundation and construction method
  • Prefabricated prestressed cylinder type open caisson fan foundation and construction method
  • Prefabricated prestressed cylinder type open caisson fan foundation and construction method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A prefabricated prestressed tubular caisson fan foundation, such as figure 1 , figure 2 , image 3 and Figure 4 , including the top section prefabricated ring 1, the standard prefabricated ring 2 and the bottom section prefabricated ring 4. A reserved hole 10 is sequentially connected by steel strands 11 passing through the reserved holes 10, the top section prefabricated ring 1 is provided with an upper anchor plate 7 and a lower anchor plate 9, the top section prefabricated ring 1, the standard prefabricated ring 2 and Several reserved holes 10 on the prefabricated ring 4 of the bottom section are evenly distributed, and two prestressed anchor bolts 6 are arranged at intervals along the diameter direction of the prefabricated ring 1 of the top section between the upper anchor plate 7 and the lower anchor plate 9. The bolt 6 is covered with a nylon nut 8 located below the upper anchor plate 7, and the bottom section prefabricated ring 4 is provided with a steel sh...

Embodiment 2

[0034] A construction method for a prefabricated prestressed tubular caisson fan foundation corresponding to Example 1, specifically:

[0035]Place the bottom section prefabricated ring 4, the standard precast ring 2 and the top section prefabricated ring 1 in order from bottom to top to form a concrete cylinder. The two adjacent reserved holes 10 of 1 are respectively connected to the high-pressure water pipe and the suction pipe. The high-pressure water pipe washes the foundation soil in the steel shoe 5 into mud, and the mud is drawn out by the suction pipe. The concrete cylinder continues to sink. The position of the reserved hole 10 connected by the high-pressure water pipe and the suction pipe adjusts the flatness of the concrete cylinder, and stops sinking when the concrete cylinder sinks into the bearing layer and has sufficient bearing capacity. The hole 10 is inserted into the cement-soil mixing pile nozzle to reinforce the collapsible soil under the concrete cylinde...

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PUM

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Abstract

The invention relates to a prefabricated prestressed cylinder type open caisson fan foundation and a construction method. The foundation comprises top section prefabricated rings (1), standard prefabricated rings (2) and bottom section prefabricated rings (4); and the top section prefabricated rings (1), the standard prefabricated rings (2) and the bottom section prefabricated rings (4) are respectively provided with a plurality of reserved holes (10) and are sequentially connected through steel strands (11) penetrating through the reserved holes (10), an upper anchor plate (7) and a lower anchor plate (9) are arranged on each top section prefabricated ring (1), a prestressed anchor bolt (6) is fixed between the upper anchor plate (7) and the lower anchor plate (9), and steel boots (5) arearranged on the bottom section prefabricated rings (4). Compared with the prior art, the prefabricated prestressed cylinder type open caisson fan foundation and the construction method in the invention have the advantages of good lateral pressure resistance and sedimentation resistance, time and labor saving, wide application range and the like.

Description

technical field [0001] The invention relates to the field of special structures, in particular to a prestressed barrel type caisson fan foundation and a construction method. Background technique [0002] The original wind turbine foundation is generally an independent expansion foundation, and on the soft soil foundation, it is a pile group plus an independent expansion foundation. Now, with the increase of wind power towers in the southern region, the cost of these foundations is relatively high and the construction period is relatively long. The PH foundation is a cylindrical wind power foundation with good economy, convenient construction and mature application. However, in the soft soil foundation with high groundwater level in the southern region, the application of the PH foundation faces many problems. The impact toughness of the PH base material is insufficient, and no prestressed tendons are configured, so it cannot cope with complex working conditions; it is heavy...

Claims

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Application Information

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IPC IPC(8): E02D27/42E02D27/44E02D27/52E02D27/18F03D13/20F03D13/25
CPCE02D27/18E02D27/425E02D27/44F03D13/22F03D13/25Y02E10/72Y02E10/727Y02E10/728
Inventor 马人乐周露
Owner TONGJI UNIV ARCHITECTURAL DESIGN INST GRP CO LTD