A method for dehydrating bored soil piles by utilizing solar splitting and ventilation

Abstract

This invention discloses a method for dehydrating bored soil piles using solar-powered splitting ventilation. This method, specifically designed for dehydrating and draining bored soil at bored pile construction sites, utilizes solar photovoltaic panels to generate electricity, a battery pack to store and output electrical energy, and an air heating and drying component and a high-pressure air source. High-pressure air is introduced into the bored soil to create splitting fissures, which serve as favorable migration channels for gas and moisture. High-temperature, dry air is then continuously introduced, draining the moisture from the bored soil pile through evaporation, moisture migration, and gas migration. This method can more conveniently and effectively drain high-moisture-content bored soil piles, utilizes green energy, occupies less construction space, and requires no additional chemical additives.

Description

Technical Field

[0001] The invention relates to a building construction method, in particular to a method for dehydrating bored slag. Background Art

[0002] The disposal of bored soil during bridge pile foundation construction has always been a major challenge. Large piles of bored soil occupy valuable construction space, causing inconvenience for subsequent construction. Furthermore, the transportation cost of bored soil is high, and its disposal and accumulation consume significant land. Therefore, reusing bored soil for roadbed filling or the preparation of building materials offers a promising approach to addressing this issue.

[0003] On-site bored soil forms large piles with an extremely high moisture content, often exceeding 40%, making it unsuitable for direct construction use. Currently, common methods for dehydrating bored soil on construction sites include adding dehydrating and water-absorbing additives, mechanical forced dehydration, and spreading and airing the soil. These methods have the following disadvantages: First, dehydrating and water-absorbing additives are expensive and pose environmental risks; second, forced dehydration machinery is expensive and consumes a lot of electricity, which is inconsistent with green construction concepts; and third, construction sites often lack space for spreading and airing the soil, which is affected by weather.

[0004] Therefore, it is necessary to propose a green and low-carbon method for dewatering bored soil with low energy consumption, low site occupation and no additional chemical additives. Summary of the Invention

[0005] Purpose of the invention: In view of the above-mentioned existing technologies, a method for dehydrating bored soil piles by using solar splitting and ventilation is proposed, which has the advantages of making full use of on-site green energy, occupying less construction space, and not requiring the use of additional chemical additives.

[0006] Technical solution: A method for dehydrating a bored soil pile using solar splitting and ventilation, comprising:

[0007] Laying high-pressure splitting pipes inside the bored soil pile;

[0008] System installation, including the installation of solar photovoltaic panel assemblies, the installation of a battery pack connected to the solar photovoltaic panel assemblies, the installation of an air heating and drying assembly, and the installation of a high-pressure gas source; the air heating and drying assembly and the high-pressure gas source are powered by the battery pack and connected to the input end of the high-pressure splitting pipeline through a tap;

[0009] First, the end of the high-pressure splitting pipe is closed, the high-pressure gas source is started, and the drilled soil pile is split by high-pressure air through the high-pressure splitting pipe to form splitting cracks;

[0010] Then, the high-pressure air source is closed, the end of the high-pressure splitting pipe is opened, and the air heating-drying component is started to introduce high-temperature dry air into the high-pressure splitting pipe. The high-temperature dry air acts on the soil surface in contact with the pipe wall and the cracks. After a certain period of time, the air heating-drying component is closed to complete the dehydration and drainage of the bored pile mud pile.

[0011] Furthermore, the high-pressure splitting pipeline includes several hard pipes, each of which has a through hole on its side wall, and several rows and columns of the hard pipes are inserted into the drilled soil pile; each hard pipe is completely immersed in the drilled soil pile, and each hard pipe is connected end to end in sequence through a hose or a hard bend pipe.

[0012] Furthermore, the high-pressure air source adopts an air compressor to provide 0.1-1 MPa high-pressure air to the high-pressure splitting pipeline.

[0013] Furthermore, the air heating-drying component includes an electric heater that heats the air to 30-200°C.

[0014] Furthermore, the hard pipe is a steel pipe, and a plurality of rows of through holes are provided on the side wall of the steel pipe along the axial direction. The diameter of the through holes is 5-10 mm, and the hole spacing is 20 cm.

[0015] Beneficial Effects: The present invention's method for dehydrating bored soil piles utilizes solar photovoltaic panels to generate electricity, a battery pack to store and output electrical energy, and an air heating and drying component and a high-pressure air source. High-pressure air is introduced into the bored soil pile to create fissures, which serve as favorable migration channels for gas and moisture. High-temperature, dry air is then continuously introduced to drain moisture from the bored soil pile through evaporation, moisture migration, and gas migration. This method can more conveniently and effectively drain high-moisture-content bored soil piles, utilizes green energy, occupies less construction space, and requires no additional chemical additives. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the principle diagram for realizing the method;

[0017] Figure 2 This is a structural diagram of a rigid pipe. Implementation Method

[0018] The present invention will be further explained below with reference to the accompanying drawings.

[0019] A method for dehydrating a bored soil pile by utilizing solar splitting and ventilation comprises the following steps:

[0020] S1: Laying high-pressure splitting pipes in the bored soil pile;

[0021] S2: System installation;

[0022] S3: splitting the drilled soil pile with high-pressure air to form splitting cracks;

[0023] S4: High-temperature dry air is introduced into the drilled soil pile to dehydrate and drain the soil;

[0024] S5: Pull out the pipe.

[0025] In step S1, the high-pressure fracturing pipeline comprises several rigid pipes 1, each with a through hole in its sidewall. These rigid pipes 1 are inserted into a borehole mound 2 in several rows and columns. Each rigid pipe 1 is fully submerged within the borehole mound 2 and connected end-to-end via connecting pipes 3.

[0026] Specifically, the hard pipe 1 can be a steel perforated pipe, or a hard rubber perforated pipe, or a plastic drain pipe, or a perforated pipe made of other hard materials to ensure that the laid pipe is ventilated and water-permeable. The laying spacing of each high-pressure splitting pipe is determined according to the influence range of the gas pressure splitting. The connecting pipe 3 adopts a hose or a hard elbow that can be bent 0-180°. The applicable temperature of the connecting pipe 3 needs to be adapted to the designed heating temperature. Both ends of each hard pipe 1 are immersed in the soil pile by 0-1m, so the connecting pipe 3 is connected to the ventilation pipe within the range of 0-1m entering the soil and 0-1m out of the soil, such as Figure 1 shown.

[0027] Step S2 involves installing the solar photovoltaic panel assembly 4, the battery pack 5 connected to the solar photovoltaic panel assembly 4, the air heating and drying assembly, and the high-pressure air source. The high-pressure air source is an air compressor 6; the air heating and drying assembly consists of an electric heater 7 capable of heating air to 30-200°C, an air drying filter 8, and a blower 9. The high-pressure air source and the air heating and drying assembly are connected to the input end of the high-pressure cleavage pipeline via corresponding pipes and taps 10. The applicable temperature of each pipe and connector must be compatible with the designed heating temperature.

[0028] The air heating-drying component and the air compressor 6 are powered by the battery pack 5; the solar photovoltaic panel assembly 4 is composed of multiple solar photovoltaic panels, and its power can be determined according to construction requirements; the battery pack 5 is composed of multiple battery packs 5, and its capacity can be determined comprehensively based on the construction power demand and the power of the solar photovoltaic panels.

[0029] In step S3, the end of the high-pressure splitting pipe is first sealed, and the air compressor 6 is started to introduce high-pressure air at 0.1-1 MPa into the pipe. With the pipe end sealed, the high-pressure air passes through the through-holes on the side of the pipe, splitting the soil to form splitting fissures. After the splitting operation is completed, the air compressor 6 is turned off.

[0030] In step S4, the end of the high-pressure splitting pipe is opened, and the air heating-drying component is started. The air volume output by the blower 9 is the high-temperature dry air heated by the electric heater 7 and dried by the air drying filter 8, which is input into the high-pressure splitting pipe. The high-temperature dry air acts on the soil surface contacted by the pipe wall and the soil cracks formed in step S3. The high-temperature dry air in the pipe brings the moisture in the soil out of the pipe through evaporation, moisture migration, etc., that is, the low-temperature and high-humidity gas is discharged from the end; after a certain period of time, the overall moisture content of the soil reaches the required value, and the air heating-drying component is turned off to complete the dehydration and drainage of the bored soil pile 2.

[0031] In step S5, each component is closed and the high-pressure splitting pipeline is pulled out for subsequent engineering use.

[0032] In this embodiment, 14 1000W single crystal solar photovoltaic panels are used for power supply; the battery pack 5 uses 4 groups of 200Ah lithium iron phosphate battery packs 5; the air compressor 6 uses an air compressor with a maximum air pressure of 2MPa; an industrial hot air heating component with a maximum power of 3400W is used, the heating temperature adjustment range is set to 30-200℃, and the air volume is set to 23m 3 / h; the pipeline connecting the air compressor 6 to the input end of the high-pressure splitting pipeline adopts a pneumatic hose with a pressure resistance of 3MPa, and the pipeline connecting the air heating-drying component and the input end of the high-pressure splitting pipeline adopts a 200℃ resistant sulfide silicone hose; the hard pipeline 1 adopts a steel pipe, and a plurality of rows of through holes are provided in the axial direction on the side wall of the steel pipe. The diameter of the through holes is 5mm and the hole spacing is 20cm. Figure 2 During construction, the gas outlet at the end of the pipeline is sealed, and high-pressure air of 0.1-1 MPa is injected. The injection is stopped when the pressure gauge reading decreases. An air heating and drying assembly is then connected for ventilation and drying. After a few days, the soil moisture content in the drilling mud pile reaches the desired level.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for dehydrating a bored soil pile by using solar splitting and ventilation, characterized in that: include: Laying high-pressure splitting pipes inside the bored soil pile; System installation, including the installation of solar photovoltaic panel assemblies, the installation of a battery pack connected to the solar photovoltaic panel assemblies, the installation of an air heating and drying assembly, and the installation of a high-pressure gas source; the air heating and drying assembly and the high-pressure gas source are powered by the battery pack and connected to the input end of the high-pressure splitting pipeline through a tap; First, the end of the high-pressure splitting pipe is closed, the high-pressure gas source is started, and the drilled soil pile is split by high-pressure air through the high-pressure splitting pipe to form splitting cracks; Then, the high-pressure air source is closed, the end of the high-pressure splitting pipe is opened, and the air heating-drying component is started to pass high-temperature dry air into the high-pressure splitting pipe. The high-temperature dry air acts on the soil surface contacted by the pipe wall and the cracks. After a certain period of time, the air heating-drying component is closed to complete the dehydration and drainage of the bored pile mud pile; The high-pressure splitting pipeline includes a plurality of hard pipes, each of which has a through hole on its side wall. The hard pipes are inserted into the drilled soil pile in a plurality of rows and columns. Each hard pipe is completely immersed in the drilled soil pile, and each hard pipe is connected end to end in sequence through a hose or a hard elbow. The high-pressure gas source adopts an air compressor, which is used to provide 0.1-1 MPa high-pressure air to the high-pressure splitting pipeline; The air heating-drying assembly includes an electric heater that heats the air to 30-200°C; The hard pipe is a steel pipe, and a plurality of rows of through holes are provided on the side wall of the steel pipe along the axial direction. The diameter of the through holes is 5-10 mm, and the hole spacing is 20 cm.

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