CN211856466U - A kind of auxiliary device for acoustic wave measurement of fractured rock mass - Google Patents

Abstract

The utility model discloses a crack rock mass sound wave measurement auxiliary device, including circulating water pump and mount, be provided with the through-hole at mount up end central point, set up still water inlet and delivery port at the mount up end, be fixed with the gasbag at mount lateral surface seal, set up the sound wave sensor in the gasbag, the connecting wire of sound wave sensor stretches out from the through-hole of mount up end, circulating water pump sets up the one side at the mount, the last outlet pipe free end of circulating water pump is connected with the water inlet of mount up end, the last wet return free end of circulating water pump is connected with the delivery port of mount up end, set up rubber plug in the through-hole of mount up end. The utility model is simple in operation convenient, effectively guarantee stability and the accuracy nature of sensor data collection in the measurement process, dismantle and remove simple and conveniently.

Description

A kind of auxiliary device for acoustic wave measurement of fractured rock mass

technical field

The utility model relates to an auxiliary device for sound wave measurement of fractured rock mass, which belongs to the field of rock mass blasting.

Background technique

Rock mass excavation is one of the important links in the process of earthwork construction, blasting construction, infrastructure slope design, etc. Blasting is usually used to loosen and throw rock mass, which will also result in blasting damage area of rock mass, physical mechanics of rock mass. The reduction of parameters affects the slope stability and the selection of blasting parameters, and prevents secondary disasters caused by wrong selection of blasting parameters. In engineering practice, the detection of rock mass damage areas by carrying out rock mass acoustic wave measurement is one of the commonly used methods, and it is also the main on-site detection method recommended by national standards and industry norms. Generally speaking, the denser and harder the rock mass, the smaller the water content, the larger the wave speed, and vice versa, the more and denser the cracks in the rock mass, will cause the phenomenon of refraction and reflection in the process of sound wave transmission, resulting in the higher the wave speed of sound wave propagation. Low.

The measurement method usually used at this stage is to drill a hole of a certain depth at the construction site, fill the hole with water coupling objects through equipment such as a sprinkler, and gradually pull up the sensor in the water to measure the wave velocity of the rock mass at different depths. It is used for geological conditions where the rock mass is complete and the drilling is not easy to leak water. For the rock mass in the cracked area, the water is usually lost in a very short time, and the permeability is high. The sensor is not coupled with the hole wall during measurement, and there is an air medium in the middle. The sound wave data measured in the uncoupled medium is inaccurate. Although it can be filled with PVC pipes and soft plastic columnar materials and then placed in the holes and then filled with water, the measured data is biased due to the characteristics of the materials, and it is not necessarily guaranteed. In-hole water coupling.

SUMMARY OF THE INVENTION

The utility model aims to provide an auxiliary device for sound wave measurement of fractured rock mass, which improves the stability, reliability and accuracy of sound wave measurement data.

The main technical scheme of the present utility model:

An auxiliary device for acoustic wave measurement of fractured rock mass, comprising a circulating water pump and a fixing frame, a through hole is arranged in the center of the upper end face of the fixing frame, a water inlet and a water outlet are also arranged on the upper end face of the fixing frame, and the outer side of the fixing frame is sealed and fixed. There is an air bag, an acoustic wave sensor is arranged in the air bag, the connecting wire of the acoustic wave sensor extends from the through hole on the upper end face of the fixing frame, the circulating water pump is arranged on one side of the fixing frame, and the free end of the water outlet pipe on the circulating water pump is connected to the upper end face of the fixing frame. The water inlet is connected, the free end of the return pipe on the circulating water pump is connected with the water outlet on the upper end face of the fixing frame, and a rubber plug is arranged in the through hole on the upper end face of the fixing frame.

As an improvement, a turntable for winding back the water pipe and the water outlet pipe is also arranged between the circulating water pump and the fixing frame.

As an improvement, pin holes are arranged in the circumferential direction on both sides of the turntable, and at least one pin tube is arranged in the pin hole to prevent the free ends of the return water pipe and the water outlet pipe rolled up in the turntable from opening.

As an improvement, grooves are arranged on the outer circumferential surface of the fixing frame to facilitate sealing and fixing the airbag.

How to use: In the case of no water shrinkage of the air bag, seal the acoustic wave sensor in the air bag, place the sensor together with the air bag, the water inlet pipe and the water return pipe in the hole where the sound wave needs to be measured, after reaching a certain depth, turn on the water pump and put the air bag Filling with water makes the airbag close to the inner wall of the hole so that it is in a coupled state with the hole wall. At this time, the sound wave velocity of the rock mass can be measured by the sensor.

The effect of the utility model:

1. Due to the flexibility of the airbag, it is suitable for the acoustic wave measurement in the rock mass with developed fractures, ensuring the coupling with the rock mass during the measurement process, thereby making the data measurement more accurate.

2. The water is not easy to be lost in the airtight air bag, and it is not necessary to fill the entire hole with water, just fill the air bag with water, which saves water resources and is more environmentally friendly.

3. The water pump and water pipe are highly portable and can be adapted to many different types of sound wave sensors, with strong adaptability.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the fixing frame;

Fig. 3 is the structural representation of the turntable;

In the drawings: 1 Circulating water pump 2 Fixing frame 3 Water outlet pipe 4 Water return pipe 5 Airbag 6 Sonic sensor 7 Sensor wire 8 Turntable 9 Rubber plug 10 Groove 11 Pin hole.

Detailed ways

As shown in Figure 1, Figure 2, Figure 3, an auxiliary device for acoustic wave measurement of fractured rock mass, including a circulating water pump 1 and a fixing frame 2, the fixing frame 2 is used to install the airbag 5 and the acoustic wave sensor 6;

A through hole is arranged in the center of the upper end face of the fixing frame 2, a water inlet and a water outlet are also arranged on the upper end face of the fixing frame 2, and an air bag 5 is sealed and fixed on the outer side of the fixing frame. elasticity;

The acoustic wave sensor 6 is arranged in the airbag 5. Of course, the acoustic wave sensor 6 has a connecting wire 7, and the connecting wire 7 of the acoustic wave sensor 6 protrudes upward from the through hole on the upper end face of the fixing frame;

The circulating water pump 1 is arranged on one side of the fixing frame 2, the circulating water pump 1 is adjacent to the fixing frame 2, and the free end of the water outlet pipe 3 on the circulating water pump is connected with the water inlet on the upper end face of the fixing frame 2. The fixed end is fixed on the body of the ring water pump 1;

The free end of the return pipe 4 on the circulating water pump 1 is connected to the water outlet on the upper end face of the fixing frame 2, of course, the fixed end relative to the free end of the return pipe 4 is fixed on the body of the ring water pump 1;

A rubber plug 9 is arranged in the through hole on the upper end face of the fixing frame 2 to prevent the water in the air bag 5 from overflowing when the circulating water pump 1 is working; the air bag 5 is filled with water through the circulating water pump 1, so that it expands and adheres to the inner wall of the hole to achieve a coupled state. After the measurement, the water is recovered by the circulating water pump 1, so that the air bag 5 is contracted and the sensor measuring device is easily taken out.

As an improvement, a turntable 8 for retracting the water pipe and the water outlet pipe is also provided between the circulating water pump 1 and the fixing frame 2. The turntable 8 is also convenient for placing the airbag 5 and the acoustic wave sensor 6 in the hole during actual detection.

As an improvement, pin holes 11 are provided on both sides of the turntable 8 in the circumferential direction, and at least one pin tube is arranged in the pin hole 11. The pin tube is not shown in FIG. The free end of the outlet pipe is open for easy transportation and storage.

As an improvement, a groove 10 is provided on the outer circumferential surface of the fixing frame 2 , so that the airbag 5 is easily sealed and fixed on the fixing frame 2 during assembly.

Claims (4)

1. An auxiliary device for acoustic wave measurement of fractured rock mass, characterized in that it comprises a circulating water pump (1) and a fixing frame (2), a through hole is provided at the center of the upper end face of the fixing frame (2), and a through hole is provided at the center of the upper end face of the fixing frame (2) The upper end face is also provided with a water inlet and a water outlet, an air bag (5) is sealed and fixed on the outer side of the fixing frame, an acoustic wave sensor (6) is arranged in the air bag (5), and the connecting wire (7) of the acoustic wave sensor (6) is connected from the fixing frame. The through hole on the upper end face protrudes, the circulating water pump (1) is arranged on one side of the fixing frame (2), the free end of the water outlet pipe (3) on the circulating water pump is connected with the water inlet on the upper end face of the fixing frame (2), and the circulating water pump The free end of the return pipe (4) on (1) is connected to the water outlet on the upper end face of the fixing frame (2), and a rubber plug (9) is arranged in the through hole on the upper end face of the fixing frame (2). 2. An auxiliary device for acoustic wave measurement of fractured rock mass according to claim 1, characterized in that: between the circulating water pump (1) and the fixing frame (2), a turntable ( 8). 3 . An auxiliary device for acoustic wave measurement of fractured rock mass according to claim 2 , wherein pin holes ( 11 ) are provided on both sides of the turntable ( 8 ) in the circumferential direction, and at least pin holes ( 11 ) are provided in the pin holes ( 11 ). 4 . A pin tube. 4. An auxiliary device for acoustic wave measurement of fractured rock mass according to any one of claims 1 to 3, characterized in that a groove (10) is provided on the outer circumferential surface of the fixing frame (2).

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