Method for rapidly determining stratum rock mass RQD based on drilling acoustic wave distribution
A sound wave and rock mass technology, which is applied in the fields of underground space engineering, geotechnical engineering, and hydraulic engineering, can solve problems such as the distribution of bad geological structures and the inability to quickly identify the distribution of lithologic parameters of borehole formations.
Active Publication Date: 2020-09-04
陕西省引汉济渭工程建设有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to provide a method for quickly determining the RQD of the formation rock mass based on the distribution of drilling sound waves, which solves the problem that the formation rock cannot be quickly identified in the prior art. The problem of the distribution of property parameters and the distribution of unfavorable geological structures
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Embodiment
[0052] Embodiment, implement according to the following steps:
[0053] Step 1. Carry out drilling coring and acoustic wave testing on the pilot hole to obtain the distribution of the pilot hole RQD along the depth direction of the pilot hole and the distribution of the pilot hole sound wave. According to the distribution of the pilot hole RQD and the distribution of the pilot hole sound wave Critical wave speed V p `;
[0054] Step 1.1. Determine the distance between the acoustic wave test receiving instruments. According to the drilling depth and accuracy requirements, the area of each 1-meter hole depth of the pilot hole is used as a pilot hole test unit, and 5 pilot hole test sections are divided into the pilot hole test unit;
[0055] In this embodiment, five pilot hole test sections are divided into the pilot hole test unit, that is, the distance between two receiving transducers is 20 cm, so the detection distance of each acoustic wave is 20 cm.
[0056] Such as f...
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The invention discloses a method for rapidly determining stratum rock mass RQD based on drilling acoustic wave distribution. The method comprises the following steps that firstly, a pilot hole is subjected to drilling and coring and acoustic wave testing, a pilot hole RQD distribution condition and a pilot hole acoustic wave distribution condition of a pilot hole rock mass in the hole depth direction are obtained, and according to the pilot hole RQD distribution condition and a pilot hole acoustic wave distribution condition, the critical wave velocity Vp is obtained; secondly, a to-be-measured hole is subjected to an acoustic wave test, an acoustic wave distribution condition of the to-be-measured hole is obtained, and in combination with the critical wave velocity Vp in the first step, ato-be-measured hole RQD is calculated; and thirdly, according to the to-be-measured hole RQD, drilling formation lithology parameter distribution and poor geologic structure distribution are recognized. According to the pilot hole acoustic wave distribution condition and the pilot hole RQD distribution condition, the critical wave velocity Vp is determined, the to-be-measured hole RQ along the drilling depth is rapidly calculated, the poor geologic structure along-the-way distribution condition is determined, and the grouting parameter control is suggested.
Description
technical field [0001] The invention belongs to the technical fields of geotechnical engineering, water conservancy engineering and underground space engineering, and relates to a method for quickly determining the RQD of a formation rock mass based on the distribution of drilling sound waves. Background technique [0002] In geotechnical engineering, water conservancy engineering, and underground space engineering, drilling grouting is widely used in foundation reinforcement and anti-seepage treatment. How to accurately control the grouting parameters is the key to fast and effective grouting. However, in the actual grouting process, due to the fuzzy parameters of the rock mass in the drilling formation and the unclear location of unfavorable geological structures (such as karst caves, fault zones, etc.), it directly leads to unreasonable selection of grouting parameters, which often leads to repeated grouting or grouting failure. occur. Therefore, how to quickly and accu...
Claims
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IPC IPC(8): E21B47/00E21B47/14E21B49/00G06Q50/02
CPCE21B47/00E21B47/14E21B49/00G06Q50/02Y02A90/30
Inventor 陈玺苏岩王智阳燕军乐王家明王博刘茜张昕王琪
Owner 陕西省引汉济渭工程建设有限公司