CN113358392A

CN113358392A - Mechanical device for taking undisturbed sample in exploratory well on ground

Info

Publication number: CN113358392A
Application number: CN202010152781.1A
Authority: CN
Inventors: 靳职锋
Original assignee: Shanxi Huajin Geotechnical Engineering Prospecting Co ltd
Current assignee: Shanxi Huajin Geotechnical Engineering Prospecting Co ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2021-09-07

Abstract

The invention discloses a mechanical device for sampling an undisturbed sample in a exploratory well on the ground, and relates to a mechanical device for sampling a deep undisturbed sample in the exploratory well only through ground operation. The invention mainly solves the following problems: firstly, the exploration well is low in work efficiency and high in cost due to the safety risk of manual sampling; secondly, the retention time of the soil sample is kept, the soil opening process is eliminated, the cost is saved, and the work efficiency is improved. The present invention solves the problem by two means: 1. through novel thin wall sampler, quiet power penetrates into the exploratory well lateral wall and directly obtains exploratory well cutting ring original state appearance, and disconnect-type run-from-opposite sampler can effectively improve sample efficiency. 2. Through gear drive, accomplish the output of sampler horizontal thrust from ground, promote the sampler and accomplish static penetration, reverse gear device withdraws from the sampler, accomplishes different degree of depth sample work in proper order repeatedly.

Description

Mechanical device for taking undisturbed sample in exploratory well on ground

Technical Field

The invention relates to a mechanical device for sampling an undisturbed sample in a deep layer in a exploratory well only through ground operation.

Background

A exploratory well is a geological investigation means, a hole with the diameter of about 700mm is formed by mechanically or manually drilling from the ground to a designed exploratory depth, the depth is 20-30m, an exploratory well original-state sample is manually put into a given position in the well at present in an exploratory technology, soil is excavated to cut a side wall soil layer of a shaft to form a soil sample block, the general size is 200X 100mm, the cut original-state soil sample is hermetically packaged and sent back to a geotechnical laboratory, and laboratory personnel adopt a cutting ring to sample in the soil block to perform a collapsibility test and other physical and mechanical property tests.

The following risk events exist in the process of the exploration well manual sampling work: the high-altitude falling, gas poisoning, breathing obstacle and object striking are carried out by 3 persons, the matched resources comprise a generator, a blower, an air pipe, an oxygen source, an anti-falling rope, emergency equipment and the like, the manual operation time is long, the labor cost is high, the risk is high, the work efficiency is low, most of practitioners are about 1965-year-old 1970 at present, and due to the industrial specificity and high risk, the practitioners are fewer and fewer, the labor cost is higher and higher, and the requirements of engineering construction are difficult to meet.

The method is characterized in that an exploratory well undisturbed sample is manually collected and then hermetically stacked on an operation site, the exploratory well undisturbed sample is delivered to a geotechnical laboratory after a certain amount of soil sample is accumulated, the geotechnical laboratory arranges soil excavation, sampling and instrument installation according to the production rhythm for testing, a detention period of 3-5 days exists in the process, and the soil sample is influenced by extrusion, moisture, temperature change and the like to a certain extent in transportation and sealed packaging and has a certain influence on the physical and mechanical properties of the soil sample.

Therefore, a sampling device is needed to be developed to improve the backward production mode, and through research, development and innovation of a sampler, an undisturbed sample of a exploration well is put in place to a cutting ring soil sample in one step and is hermetically sent back to a geotechnical laboratory to perform indoor tests in time, so that the retention effect of time is reduced to cause the change of physical and mechanical indexes.

Disclosure of Invention

Exploratory well thin-wall sampler: rapidly and continuously pressing in by static force, wherein the speed is more than 0.1 m/s; the sampler adopts thin-wall galvanized steel, the wall thickness is 2mm, the thin wall is favorable for penetration, and the disturbance to the soil layer is small; the sampler adopts a split separation type, so that the installation and the disassembly of the cutting ring sample are convenient, two ends of the sampler are connected by screw threads, the part close to the propeller is a female buckle, and the part close to the pipe boot is a male buckle; 3-5 cutting ring samples (partial penetration in a double-line method and full penetration in a single-line method) are arranged on each sampler, and 10mm waste soil sections are reserved at the head and the tail of each cutting ring; a gap of 1-2mm is reserved on each side of the inner wall of the sampler, and a lubricant is coated during use, so that the ring cutter soil sample is convenient to disassemble; 5 grooves are formed in the outer portion of the sampler, the depth of the grooves is 1mm, and therefore soil discharging and drilling forming air pressure are facilitated when the sampler penetrates through the grooves; pipe boot bottom is the box, and pipe boot tip 8mm section is cut down according to 14 degrees carrying out the pitch arc, and convenient penetration and exhaust, the lower cut section should not be long, otherwise causes the extrusion of soil closely knit easily, influences the soil sample quality.

A propeller: the propeller is a quenched steel solid rod with the length of 90mm, the two sides of the propeller are provided with sawteeth, the tooth pitch is 6.666, the purpose of propelling is achieved by the fact that the sawteeth are attached to gears on the two sides, the length of the rod section of the propeller is at least 150mm, the sampling length requirement of the sampler is met, 10% of surplus is reserved, the front end of the propeller is connected with a screw thread of the sampler, the length of the propeller is 30mm, and the inside and the outside of a gear box are respectively 15 mm; and two ends of the gear box are provided with limiting cushion blocks 94 × 5 × 2mm, the wings of the limiting cushion blocks are 5mm high, and the cushion blocks are used for placing and fixing the propeller.

A gear box: length 240 × 185 × 180mm, thickness 2 mm's galvanized iron sheet, the light transport of easily carrying on the one hand, protection gear device does not receive the dust on the one hand, corruption such as dust, 2 gears of installation in the gearbox, model 33228620, pitch 6.666, M2, gear rotation drives the propeller and advances forward, and then promote the sampler and get into the soil layer and accomplish sample work, every gear is settled on 2 parallel tracks, according to sampler depth adjustment gear that buries at orbital location initial position, move on the track and realize through diameter 4 mm's ball, can be used to external diameter 20 mm's quenching steel pole in the middle of the gear to pass, cross gear 20mm, the propeller bottom is through 20 mm's steel pipe welding or bolted connection, the position of fixed gear.

Drilling a rod: the quenched steel rod is 20mm in diameter, the female button of one end is buckled with a terminal, and the finished product that the specification is 1m and 2m is convenient for erection joint and is being taken a sample in the different degree of depth department of exploratory well, and follow exploratory well degree of depth and sample position in proper order and go on in the time of taking a sample, and the drilling rod is fixed with the stull when every 5m, prevents to shake the stability that influences sampling device that the rocking handle caused when rocking the gear.

A ground device: 2 33228620 model gears, every gear upper portion is equipped with the rocking handle, promotes the gear through the rocking handle, penetrates the exploratory well lateral wall through the propeller static pressure and takes a sample, and the ground gear passes through 20mm steel pole welding or bolted connection, with rocking handle gear system, drilling rod with tripod bolted connection, stabilizes in subaerial, tripod frame leg is pricked deeply ground around the exploratory well during sample operation, adjusts sampling device's position through the tripod.

Drawings

The attached figure I is as follows: the top view of the sampler and the gear box mainly illustrates the structure of the sampler and the gear box.

The second attached drawing: the whole elevation of the sampling device comprises the elevation of a surface device and a sampling device in a well in a detection well.

Description of the devices of the figures: 1- -sampler tube shoe; 2-reserving a waste soil section; 3-cutting ring 79.8 × 2mm, δ 2 mm;

4- -the wall phi of the sampler tube is 90mm, and delta is 2 mm; 5- -primary and secondary screw threads; 6-pad 95 x 5 x 2 mm;

7- -Gear 33228620 Pitch 6.666; 8-propeller phi is 90mm pitch 6.666;

9-track b 5mm, l 185 mm; 10-gear fixing bracket b is 20mm delta is 2 mm;

11- -ball phi is 3-4 mm; 12- -drill pipe phi is 20 mm;

13-gear box 240 x 185 x 2mm 14-exploratory well side wall;

15- -a tripod; 16- -rocking handle;

17- -fixing bolt.

Detailed Description

Transverse thrust is applied to the propeller through the rocking handle rotating gear, the static pressure sampler penetrates into the borehole wall and takes an original state sample, then the sampler is taken out through the reversing rocking handle, the sampler is pulled up to the ground, the sampler is disassembled, then the original state sample of the cutting ring is obtained, and the sample is completely stored in a sealed mode and is timely sent back to the geotechnical laboratory for corresponding test.

Adopt the original state appearance of the different degree of depth of exploratory well in proper order through the drilling rod continues, for preventing that the wall of a well sample back soil layer from falling back in the well, sample work upwards takes in proper order from exploratory well bottom.

The device can effectively avoid the risk caused by the personnel going into the well, improves the sampling speed by mechanical sampling, reduces the workload of indoor tests because the original sample is the cutting ring sample, and simultaneously keeps the original property of the soil sample.

Claims

1. The invention discloses a mechanical device for taking an original sample in a exploratory well on the ground, which is mainly technically characterized in that:

1 thrust generation device: the ground operation gear generates deep horizontal thrust through gear transmission, pushes the sampler to penetrate into the lateral wall of the exploration well, and applies for protection of the property right of a force transmission system of the deep thrust generation device.

2, a sampler device: the split type split device is adopted, and is penetrated into a soil layer on the side wall of the exploration well, positive rotation precession and negative rotation precession are carried out, so that a ring cutter exploration well original state sample is directly obtained, and an internal ring cutter type sampler is applied to be protected.