After-water-injection vibrating and compacting construction method of desert photovoltaic bracket pile foundation

A photovoltaic support and construction method technology, applied in the field of foundation, can solve problems such as poor economy, high cost, and difficult quality assurance, and achieve the effects of improving bearing capacity and anti-overturning ability, saving building materials, and improving engineering efficiency

Inactive Publication Date: 2020-09-29
POWERCHINA XIBEI ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the loose microstructure of aeolian sand results in low foundation bearing capacity, low restraint lateral resistance to piles, and low overturning resistance.
Secondly, the stress characteristics of the photovoltaic support pile foundation are small vertical downward pressure, large horizontal load and upward pullout force, so it is not possible to directly adopt the foundation scheme of similar site construction structures
Finally, the structural efficiency of the existing photovoltaic support pile foundation is low, and a longer pile length is required to meet the force requirements of the upper photovoltaic support
When the site is leveled before pile formation, it is required to compact the foundation of the entire site by rolling or dynamic compaction. The treatment area is large, the water consumption is large, the compactness is high, the cost is high, and the quality is difficult to guarantee
The existing scheme has a large amount of engineering, difficult construction, high cost and poor economy, and is not suitable for fine sand foundations of aeolian sand sites in desert areas

Method used

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  • After-water-injection vibrating and compacting construction method of desert photovoltaic bracket pile foundation
  • After-water-injection vibrating and compacting construction method of desert photovoltaic bracket pile foundation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] according to Figure 1-Figure 2 A post-injection vibration-dense construction method for desert photovoltaic support pile foundation shown, including the following steps

[0035] Step 1: Site leveling;

[0036] Step 2: Measure and locate

[0037] After step 1 is completed, mark the center position of the foundation pile 1 of the photovoltaic support foundation on the ground according to the design drawing, measure and set out the position of the foundation pile 1 of the photovoltaic support foundation and mark it;

[0038] Step 3: Piling into piles;

[0039] Step 4: Strengthen the sand layer around the pile;

[0040] Step 5: Surface 3 treatment of the sand layer around the pile.

[0041] In actual use, the pile foundation site is first leveled and properly compacted with bulldozer equipment. Then mark the center position of the photovoltaic support foundation pile 1 on the ground according to the design drawings, and use measuring tools and instruments to measure, ...

Embodiment 2

[0047] according to Figure 1-2The post-injection vibration-dense construction method of a desert photovoltaic support pile foundation shown is different from Example 1 in that the specific method for strengthening the sand layer around the pile in the fourth step is: for the photovoltaic support foundation pile 1, steel bars For concrete pouring piles, after the concrete reaches the preset strength, if the foundation pile 1 of the photovoltaic support is a reinforced concrete prefabricated pile or steel pile, after the pile driving is completed, sand around the pile shall be carried out within the preset sand layer reinforcement range 2 layer reinforcement; during reinforcement, insert a metal water pipe with a diameter of 20-40 mm into the sand layer around the pile to a predetermined depth, and evenly arrange water injection and vibration positions 5 around the foundation pile 1 of the photovoltaic support, and inject water into the water injection and vibration positions 5....

Embodiment 3

[0055] according to Figure 1-2 The post-injection vibration-dense construction method of a desert photovoltaic support pile foundation shown is different from the first embodiment in that: when the sand layer around the pile is reinforced in the fourth step, that is, the sand layer of the photovoltaic support foundation pile 1 is reinforced The sand layer compaction coefficient in range 2 is not less than 0.94.

[0056] In actual use, the adoption of this technical solution can ensure the stability of the photovoltaic support foundation pile 1 .

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Abstract

The invention belongs to the technical field of foundations, and particularly relates to an after-water-injection vibrating and compacting construction method of a desert photovoltaic bracket pile foundation. According to the method, by five steps including site formation, measurement and positioning, piling and pile formation, reinforcement of a sand layer on the periphery of a pile and surface treatment of the sand layer on the periphery of the pile, the solar photovoltaic bracket pile foundation suitable for an aeolian sand site silty-fine sand foundation in a desert area and a corresponding foundation treatment mode are completed. After pile formation, water injection and sand filling are adopted for aeolian sand strata in a certain range on the periphery of the vibrating pile, an original microstructure of aeolian sand is damaged, aeolian sand on the periphery of the pile is reinforced, constraining force and side resistance of the sand layer on the periphery of the pile to the pile are increased, bearing capacity of the pile foundation is increased, pile length is effectively shortened, construction is convenient, engineering quantity is reduced, construction cost is reduced,and economical efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of foundations, and in particular relates to a post-injection vibration-dense construction method for desert photovoltaic support pile foundations. Background technique [0002] China has a vast desert area and abundant solar energy resources. The centralized ground photovoltaic power station has high power generation efficiency. In aeolian sandy sites in desert areas, the shading effect of solar photovoltaic panels and the water used to clean solar photovoltaic panels can increase the water needed for plant growth and create conditions for the growth of shade-tolerant plants. Photovoltaic panels covering a large area will absorb solar radiation and convert it into electrical energy, reducing a large amount of direct solar radiation on the surface, which is conducive to transforming and consuming the power source of sandstorms in desert areas. Photovoltaic arrays have the function of mechanical sand barrie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/12E02D27/44E02D3/00H02S20/10
CPCE02D3/00E02D27/12E02D27/44H02S20/10Y02E10/50
Inventor 徐翔吕宏伟王迎春段文超
Owner POWERCHINA XIBEI ENG
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