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A kind of early warning and treatment method for pile foundation impact hole-forming construction accident in karst development area

A technology of impacting pore-forming and developing areas, applied in data processing applications, special data processing applications, instruments, etc., can solve the characteristics of difficult karst development, cannot reveal the lateral distribution and development of karst, and cannot determine the location and distribution of karst caves and fissures, etc. problem, to achieve the effect of strong guidance and easy operation

Active Publication Date: 2022-07-19
GUILIN UNIVERSITY OF TECHNOLOGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the diameter of pile foundations is generally above 1.0m, and large-diameter pile foundations above 2.0m have also begun to be used, but the drilling diameter is generally less than 10cm, which can only reveal the geological phenomena within the drilling range, but cannot reveal the lateral distribution and development of karst. It cannot fully reflect the geological phenomenon within the scope of pile foundation hole formation
Therefore, it is difficult to accurately judge the karst development characteristics within the pile hole range based on the borehole data alone
[0004] Geophysical prospecting is an indirect exploration method that highly relies on the knowledge structure and experience of technicians. It can only indicate the risk of caves and fissures around the borehole, but cannot determine the location and distribution of caves and fissures.
Therefore, in the construction of pile foundation holes in karst developed areas, unrevealed karst caves are often encountered, which leads to the lack of adequate countermeasures for the staff and the inability to carry out risk management in time, resulting in construction accidents
[0005] In summary, the percussive hole-forming construction of pile foundations in karst-developed areas still relies heavily on the experience and sense of responsibility of pile driver operators

Method used

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  • A kind of early warning and treatment method for pile foundation impact hole-forming construction accident in karst development area
  • A kind of early warning and treatment method for pile foundation impact hole-forming construction accident in karst development area
  • A kind of early warning and treatment method for pile foundation impact hole-forming construction accident in karst development area

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Embodiment 1

[0073] The Xueyuan Bridge in this embodiment is located in Xincheng District, Yangshuo County, Guilin City, Guangxi Province, with a total of 44 pile foundations designed. During the preliminary geotechnical investigation, it was found that there are large karst caves in this area.

[0074] The early warning and treatment method for the construction accident of pile foundation impact hole forming in the karst development area of ​​the above-mentioned Xueyuan Bridge includes the following steps:

[0075] Step 1: Geotechnical Drilling

[0076] Geotechnical engineering drilling is carried out in the karst development area. A total of 44 exploration holes are arranged in the pile foundation survey site, numbered QK1-1~QK44-1. One pile and one hole are used for drilling, and the drilling plane is located in the center of the pile foundation. Due to the large amount of data, it is impossible to list them one by one. Taking QK3-1 as an example, the results of the cylindrical section ...

Embodiment 2

[0101] The total length of the Peisen Liujiang Bridge in this embodiment is 2578.97m, and the main bridge is designed as a 145m+280m+145m prestressed concrete low tower cable-stayed bridge, which is the largest span of the same type of bridge in Asia. The geological karst is highly developed in the bridge site area of ​​the main pier on the Xiangzhou bank, the boulder covering layer is 10m thick, the bedrock is high and complete, and the compressive strength is high. During the survey, it was found that 24 pile foundations were located in a total of 104 different sizes. , interconnected caves. In order to ensure the smooth progress of the construction, a three-dimensional geological information model was established to guide the construction of the pile foundation.

[0102] The above-mentioned early warning and treatment method for the construction accident of pile foundation impact hole forming in the karst development area of ​​the main pier bridge site area of ​​Xiangzhou B...

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Abstract

The invention discloses a method for early warning and treatment of construction accidents of pile foundation impact hole forming in a karst development area, and belongs to the technical field of civil engineering safety early warning. It includes the following steps: step 1: geotechnical engineering drilling; step 2: three-dimensional geological information modeling; step 3: pre-judgment of the risk of pile foundation impact hole formation; step 4: treatment of pile foundation hole formation risk. The invention can effectively warn the construction accidents that may occur in the impact hole formation of the pile foundation in the karst development area, and the staff can carry out corresponding risk treatment, significantly reduce the occurrence probability of construction accidents, improve the construction efficiency of the pile foundation hole formation, save money, and shorten the construction period. .

Description

technical field [0001] The invention relates to an early warning and treatment method for a pile foundation impact hole-forming construction accident in a karst development area, and belongs to the technical field of civil engineering safety construction early warning. Background technique [0002] The karst landforms in my country are mainly distributed in Guangxi, Guizhou, Yunnan and Sichuan provinces. Macroscopically, karst development has certain regularity, but microscopically, karst shape, extension and distribution lack regularity. The bedrock surface in the karst development area is undulating and uneven. The karst caves and karst crevices in the bedrock are disordered in distribution, peculiar in shape, and extremely complex and changeable. This brings great risks to the pile foundation construction of bridges and buildings, and construction accidents such as partial holes, stuck drills, slurry leakage and hole collapse are very likely to occur, thereby delaying t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06Q10/06G06Q50/08
CPCG06F30/20G06Q10/0635G06Q50/08
Inventor 刘均利黄士睿朱万旭孙刚臣蒋承峰吴汶垣余文成赵万里张炳晖黄绍茂蒋志军邓康成陈雪辉谢建新曹贤发秦健
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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