Novel metro engineering geological exploration method based on drilling and micro detection combination

Abstract

The invention discloses a novel metro engineering geological exploration method based on drilling and micro detection combination. The geological exploration method comprises three stages, namely a preliminary exploration stage, a detailed exploration stage and a supplementary exploration stage; circular seven-node interactive micro data collection units are adopted in micro detection; and each circular seven-node interactive micro data collection unit comprises an array composed of seven seismic recorders, wherein six seismic recorders are uniformly distributed on the circumference of the same virtual circle, and one seismic recorder is arranged at the center of the virtual circle. The method has the advantages that through the novel geological exploration method based on drilling and micro detection combination, a series of problems, such as an excessively large geological blind area, limited measuring point distribution and outstanding environment problems, in a traditional geological exploration method are solved; a continuous high-precision transverse-wave (S-wave) velocity profile in a measuring region can be acquired, and geological information is richer and more accurate; and meanwhile, geological exploration efficiency is improved, and construction cost is saved.

Description

technical field [0001] The invention relates to a new method of geological exploration for subway engineering combining drilling with micro-motion detection. Background technique [0002] The subway belongs to the category of underground public facilities construction. With the intensification of the rail transit network, the situation in the subway construction area is becoming more and more complicated, and the construction difficulty is becoming more and more difficult. On the one hand, in the process of subway shield construction, special geological structures such as karst caves, boulders, and fault zones are often encountered. Carrying out subway shield construction in complex strata containing the above-mentioned special structures is not only difficult to construct, but also extremely risky. High; on the other hand, the intricate urban underground pipe network is also a major problem that plagues shield construction. To solve the above two problems, it is necessary ...

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Problems solved by technology

[0004] 1. Severely limited by site conditions: above the shield section of the subway, there are often busy urban arterial roads, and destructive means for geological surveys are usually not allowed on such arterial roads

[0005] 2. The geological blind area is too large: Due to the constraints of construction conditions and costs, the distance between geological drilling holes is usually 50-100m. In fact, there are geological blind areas between the holes, which can only be carried out by relying on the information of the left and right holes. It is speculated that the accuracy is difficult to guarantee, and it is likely to cause large errors, which will bring risks to the construction

[0006] 3. Destructive and not environmentally friendly: the drilling depth of geological drilling is at least 10 meters, which will cause damage to urban roads, and may also damage existing underground pipelines, resulting in water cuts, power outages, pipeline leakage, and even Accidents such as gas explosions will seriously affect the quality of life of residents and social security issues; in addition, the continuous operation of drilling rigs will also bring a series of problems such as noise pollution and dust

[0007] 4. Conventional geophysical exploration methods such as geological radar and resistivity method have insufficient depth of exploration, poor anti-interference ability, prone to data distortion, insufficient detection accuracy and other problems

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