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Early warning treatment method for impact holing construction accident of pile foundation in karst development area

A technology of impact pore formation and development zone, applied in data processing applications, special data processing applications, instruments, etc., can solve the development characteristics of refractory karst, cannot reveal the lateral distribution and development of karst, and cannot determine the location and distribution of karst caves and fissures, etc. problems, to achieve the effect of strong guidance and easy operation

Active Publication Date: 2021-06-22
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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  • Early warning treatment method for impact holing construction accident of pile foundation in karst development area
  • Early warning treatment method for impact holing construction accident of pile foundation in karst development area
  • Early warning treatment method for impact holing construction accident of pile foundation 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, 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 pile foundation impact hole-forming construction accidents in the above-mentioned Xueyuanqiao karst development area includes the following steps:

[0075] Step 1: Geotechnical Drilling

[0076] Geotechnical 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. The drilling uses one pile and one hole, 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 drilled columnar section are shown in Table 1.

[0077] Table ...

Embodiment 2

[0101] The total length of the Peisen Liujiang Super 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 Xiangzhou main pier bridge site area, the boulder overburden layer is as thick as 10m, the bedrock is relatively high and complete, and the compressive strength is high. During the investigation, it was found that 104 piles of different sizes were distributed at the location of the 24 pile foundations. , 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 pile foundation impact hole-forming construction accidents in the karst development area of ​​the Xiangzhou main p...

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Abstract

The invention discloses an early warning treatment method for impact holing construction accidents of a pile foundation in a karst development area, and belongs to the technical field of civil safety early warning. The method comprises the following steps: step 1, geotechnical engineering drilling; 2, three-dimensional geological information modeling is carried out; 3, pre-judging the impact holing risk of the pile foundation; and 4, the pile foundation hole forming risk is treated. According to the method, construction accidents possibly occurring in pile foundation impact holing in the karst development area can be effectively warned, workers can carry out corresponding risk treatment, the occurrence probability of the construction accidents is remarkably reduced, the construction efficiency of pile foundation holing is improved, funds are saved, and the construction period is shortened.

Description

technical field [0001] The invention relates to an early warning and treatment method for construction accidents of pile foundation impact hole formation in a karst development area, and belongs to the technical field of early warning for civil engineering safety construction. Background technique [0002] my country's karst landforms are mainly distributed in four provinces: Guangxi, Guizhou, Yunnan and Sichuan. Macroscopically, karst development has certain regularity, but microscopically, karst form, extension and distribution lack regularity. The bedrock surface in the karst development area has large undulations and unevenness. The karst caves and karst crevices in the bedrock are distributed disorderly, have peculiar shapes, and are extremely complex and changeable. This brings great risks to the pile foundation construction of bridges and buildings, and construction accidents such as hole deviation, drill sticking, slurry leakage and hole collapse are extremely pron...

Claims

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Application Information

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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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