CN114518251B - Highway engineering detects with sample device that fetches earth - Google Patents
Highway engineering detects with sample device that fetches earth Download PDFInfo
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- CN114518251B CN114518251B CN202210418157.0A CN202210418157A CN114518251B CN 114518251 B CN114518251 B CN 114518251B CN 202210418157 A CN202210418157 A CN 202210418157A CN 114518251 B CN114518251 B CN 114518251B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
Abstract
The application discloses a soil sampling device for highway engineering detection, which belongs to the field of highway construction monitoring and comprises an outer barrel and an inner barrel, wherein the inner barrel is detachably fixed in the outer barrel, the bottom end of the outer barrel is provided with a drilling part, the drilling part is used for cutting a soil layer, and the inner barrel consists of 2-6 unit slices; the unit pieces are all cylindrical pieces, the contact points of the top edges are hinged, and the top edges form a complete circle; the arc length of the bottom edge of each unit chip is smaller than that of the top edge, and a gap is formed between every two adjacent unit chips; the bottom of the inner wall of the outer barrel is provided with an annular abutting ring, the top of the abutting ring is provided with a wedge head matched with the bottom end of the notch, the longitudinal section of the wedge head is trapezoidal, and the height of the wedge head is not more than 5 mm; after the gap of the inner cylinder is inserted into the wedge head, the inner wall of the inner cylinder is flush with the inner wall of the abutting ring. The device can effectively extract relatively complete soil cores.
Description
Technical Field
The invention relates to a sampling device for sampling and detecting a soil layer roadbed in civil construction in highway construction, in particular to a drilling sampling device.
Background
In the construction of the highway, the first stage is civil engineering, and the soil at the lowest layer needs to be treated. In the construction process, sampling detection needs to be carried out on the compacted soil foundation, and detection items such as compactness, water content and the like need to be carried out.
The existing soil sample detection has a drill cylinder capable of taking a soil core, such as a double-wall soil column soil sampler in the prior art CN 102879222B. The soil core is taken out by using the inner and outer double cylinders, but the soil core is easily separated from the inner cylinder when the inner cylinder is drawn out, the inner cylinder and the soil core cannot be drawn out synchronously, or the lower part of the soil core is broken when the inner cylinder is drawn out in actual use. Therefore, different positions of the soil core cannot be detected respectively.
Disclosure of Invention
This application embodiment is through providing a highway engineering detects with soil sampling device, through improving the structure that a plurality of cell pieces are constituteed with the inner tube, can follow the bottom package and press from both sides the soil core when drawing the soil core, and the soil core of extraction is more complete.
The embodiment of the application provides a soil sampling device for highway engineering detection, which comprises an outer barrel and an inner barrel, wherein the inner barrel is detachably fixed in the outer barrel, the bottom end of the outer barrel is provided with a drilling part, and the drilling part is used for cutting a soil layer;
the inner cylinder consists of 2-6 unit slices;
the unit pieces are all cylindrical pieces, the contact points of the top edges are hinged, and the top edges form a complete circle;
the arc length of the bottom edge of each unit chip is smaller than that of the top edge; the lengths of the opposite planes of the two adjacent unit chips are the same, and a gap is formed between the two planes;
the bottom of the inner wall of the outer barrel is provided with an annular abutting ring, the top of the abutting ring is provided with a wedge head matched with the bottom end of the notch, the longitudinal section of the wedge head is trapezoidal, and the height of the wedge head is not more than 5 mm;
after the gap of the inner cylinder is inserted into the wedge head, the inner wall of the inner cylinder is flush with the inner wall of the abutting ring.
Furthermore, the top of the inner cylinder is fixedly connected through a connecting piece, and the connecting piece is fixedly connected with a hinge point between the unit chips.
The device further comprises a plastic film which completely covers the outer wall of the inner cylinder in the longitudinal direction, and a negative pressure pipe, wherein one end of the negative pressure pipe is communicated with a negative pressure source, the other end of the negative pressure pipe is positioned between the plastic film and the inner cylinder, and the thickness of the plastic film is within the range of 0.3-0.4 mm; the plastic film is one of a PVC film, a PE film or a HDPE film.
The plastic film is provided with a folding part which extends upwards from the bottom of the inner cylinder; the annular cable sleeve is arranged at the joint between the annular cable sleeve and the plastic film coated inner cylinder part; one end of the annular cable is provided with a lantern ring, the other end of the annular cable extends out of the lantern ring, the extending end is fixedly connected with the pulling part, and the pulling part is a pull rope and extends out from the position between the inner cylinder and the outer cylinder.
Furthermore, an electric heating part is fixed on one side of the annular cable opposite to the lantern ring, the electric heating part is fixedly connected with a traction cable, and the traction cable also extends out from the position between the inner cylinder and the outer cylinder; paraffin is placed between the turnover part and the plastic film coating inner cylinder part.
Furthermore, the closing-in assembly also comprises an inner cable, the outer diameter of the inner cable is smaller than the inner diameter of the annular cable, the plastic film penetrates through the space between the inner cable and the annular cable, the inner cable and the annular cable share a lantern ring, and the other end of the inner cable is also fixed with the lifting part; the folding part is provided with an axial long seam, and the lifting part extends out of the long seam.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
if the inner barrel is a cylindrical barrel, coring is easy to fall off or incomplete, and if the inner barrel is a complete inverted cone, the soil core can be scattered in the inner barrel. Therefore, the inner cylinder is made into a structure which is hinged by a plurality of unit pieces and can inwards wrap and clamp the soil core. The unit piece is a part of a cylindrical surface, the side length of the bottom edge is smaller than that of the top edge, and a cylindrical inner cylinder with a plurality of notches can be formed by matching the wedge head at the bottom end of the outer cylinder, so that coring is not influenced. However, after the inner cylinder is pulled out upwards to be separated from the wedge head, when pressure is applied to the unit pieces, the bottom ends of the unit pieces have the effect of wrapping and clamping the soil core inwards, and a relatively complete soil core is conveniently taken out.
Drawings
FIG. 1 is a schematic bottom view of the outer barrel structure of the present invention;
FIG. 2 is a schematic longitudinal cross-section of the apparatus;
FIG. 3 is a schematic view of the apparatus with a folded portion;
FIG. 4 is a schematic view of the bottom matching structure of the inner cylinder and the plastic film;
FIG. 5 is a schematic view of a plastic film closing-in structure with paraffin wax;
FIG. 6 is a schematic view of a closure assembly;
figure 7 is a schematic view of the contracted assembly in a contracted state.
In the figure: outer cylinder 100, drilling part 110, interference ring 120, wedge 121;
an inner cylinder 200, a unit part 210, and a connector 220;
a closing-in component 400, a ring-shaped cable 410, a lifting part 420, an inner cable 430, an electric heating part 440 and a pulling cable 450.
Detailed Description
In order to facilitate an understanding of the present invention, the present application will now be described more fully with reference to the accompanying drawings; the preferred embodiments of the present invention are illustrated in the accompanying drawings, but the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is noted that the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
If the inner barrel 200 is a cylindrical barrel, coring is easy to fall off or incomplete, and if the inner barrel is a complete inverted cone, the soil core is easy to scatter in the inner barrel. Accordingly, the inner cylinder 200 is constructed in a structure in which a plurality of unit pieces are hinged to sandwich the soil core inward. The unit slice 210 is a part of a cylindrical surface, the length of the bottom edge is less than that of the top edge, and a cylindrical inner cylinder with a plurality of notches can be formed by matching the wedge 121 at the bottom end of the outer cylinder 100, so that coring is not influenced. However, when the inner cylinder 200 is pulled out upwards to separate from the wedge 121, the bottom end can move inwards to clamp the soil core, so that a relatively more complete soil core can be conveniently taken out.
Example one
A soil sampling device for highway engineering detection comprises an outer cylinder 100 and an inner cylinder 200, wherein the inner cylinder 200 is detachably fixed in the outer cylinder 100, the bottom end of the outer cylinder 100 is provided with a drilling part 110, the drilling part 110 is used for cutting soil layers,
the inner barrel 200 is composed of 2-6 unit pieces 210;
the unit slices 210 are all cylindrical slices, the contact points of the top edges are hinged, and the top edges form a complete circle;
the arc length of the bottom side of the unit slices 210 is smaller than that of the top side, a gap is formed between two adjacent unit slices 210, the two sides of the gap are the side planes of the adjacent unit slices 210, and the lengths of the two side planes are the same;
the bottom of the inner wall of the outer cylinder 100 is provided with an annular collision ring 120, the top of the collision ring 120 is provided with a wedge 121 matched with the bottom end of the gap, the longitudinal section of the wedge 121 is trapezoidal, and the height is not more than 5 mm;
after the gap of the inner cylinder 200 is inserted into the wedge 121, the inner wall of the inner cylinder 200 is flush with the inner wall of the interference ring 120.
The top of the inner cylinder 200 is fixedly connected by a connection member 220, and the connection member 220 is fixedly connected to a hinge point between the unit chips 210. Thus, the inner cylinder 200 can be lifted out of the outer cylinder 100 by the coupling member 220.
When the device is used, the inner cylinder 200 is inserted into the contact ring 120, and the wedge 121 rotates along with the outer cylinder, so that the inner cylinder 200 is driven to rotate. The outer cylinder 100 is controlled to rotate to cut the soil layer, and after the soil core is drilled, the inner cylinder 200 is lifted upwards from the top, so that the inner cylinder is pulled out from the wedge 121. After pulling out, the top edge of the unit piece 210 is pressed to clamp the soil core inwards by the inner cylinder unit piece. This allows a relatively more complete core of soil to be removed.
Example two
In the embodiment I, the lower part or the lower end of the soil core is easy to damage when the soil core is used. The manual pressing of the unit piece 210 while pulling the inner cylinder is inconvenient. Therefore, the plastic film 300 is coated outside the inner cylinder 200, the plastic film 300 is sucked under negative pressure, and the pressed unit pieces 210 are shaped, so that the inner cylinder is convenient to operate and lift out. As shown in fig. 1-5.
The plastic film 300 completely covers the outer wall of the inner barrel 200 in the longitudinal direction, and the plastic film further comprises a negative pressure pipe 310, wherein one end of the negative pressure pipe 310 is communicated with a negative pressure source, and the other end of the negative pressure pipe 310 is positioned between the plastic film 300 and the inner barrel 200.
When the soil core is extracted, after the inner cylinder 200 is separated from the wedge 121, the negative pressure source vacuum pump is started to enable the plastic film to adsorb and wrap the inner cylinder, so that the unit slices 210 of the inner cylinder 200 can better maintain the shape and the position of the unit slices 210 wrapping and clamping the soil core after the unit slices 210 are subjected to additional pressure and self gravity, the unit slices 210 are not easy to shift, and the operation of extracting the soil core is convenient.
EXAMPLE III
The wrapping of the plastic film 300 has a significant effect on the soil core with higher compaction degree, but the compaction degree is lower, the particles are relatively loose particles, and the integrity of the bottom end of the soil core is not high. Therefore, the binding off component 400 is added, and the binding off component 400 is matched with the plastic film 300 to wrap the bottom of the soil core.
The closing-in component 400 comprises an annular cable 410, the annular cable 410 surrounds the plastic film 300, the plastic film 300 is provided with a folding part 320, and the folding part 320 extends upwards from the bottom of the inner cylinder; the annular cable 410 is sleeved at the joint between the annular cable and the part of the plastic film 300 covering the inner barrel 200; one end of the annular cable 410 is provided with a sleeve ring, the other end of the annular cable extends out of the sleeve ring, the extending end is fixedly connected with the pulling part 420, and the pulling part 420 is a pulling rope and extends out from the position between the inner cylinder 200 and the outer cylinder 100.
When the soil core is extracted, the inner cylinder 200 is lifted up and separated from the wedge 121, and then the plastic film 300 is coated on the inner cylinder after suction is performed through the negative pressure pipe 310. At the moment, the inner cylinder can be slightly lifted to crack the bottom of the soil core, then the lifting part 420 is pulled to tighten the annular cable 410, the turnover part 320 is driven to be inserted into the bottom of the soil core and cover the bottom surface of the soil core, so that the bottom of the soil core is not easy to crack and fall off in the process of extracting the soil core, and the taken soil core is relatively complete.
In actual use, the plastic film is easy to break and leak under the traction of the annular cable 410 and the friction of the soil core, so that an electric heating part 440 is fixed on one side of the annular cable 410 opposite to the lantern ring, the electric heating part 440 is fixedly connected with a traction cable 450, and the traction cable 450 also extends out from the position between the inner cylinder and the outer cylinder; paraffin is placed between the turnover part 320 and the part of the inner cylinder 200 coated by the plastic film 300, when coring is carried out, firstly, the paraffin is melted through the electric heating part 440, the annular cable 410 is tightened through the pulling part 420, when the outer diameter of the annular cable 410 is pulled to be smaller than that of the inner cylinder, the pulling cable 450 is tightened and then the pulling part 420 is pulled, when the diameter of the annular cable 410 is reduced and the pulling cable 450 is loosened, the diameter of the pulling part 420 is reduced within a certain range, and when the pulling cable 450 is repeatedly tightened, the turnover part 320 can be stressed relatively uniformly, and the probability of being pulled is reduced. Meanwhile, the paraffin can lubricate the annular rope 410 and the plastic film 300, in addition, if the plastic film 300 is damaged, the paraffin can block a smaller damaged hole, and the folded part 320 can be attached to the plastic film under the adhesion of the paraffin to form double-layer coating, so that the plastic film is effectively prevented from being damaged, and soil is effectively prevented from scattering, as shown in fig. 1-6.
Common paraffin can be selected as the paraffin, the melting point temperature is about 60 ℃, the softening temperature is about 45 ℃, and the temperature basically has no influence on the strength of common PVC and PE plastic films. The plastic film with higher strength can be selected. For example, the plastic film can be a 0.3-0.4mm thick geomembrane made of HDPE material, and has high strength, high use temperature above 100 ℃ and good ductility. The heating temperature of the electric heating part 440 is in the range of 60-65 ℃, and commercially available constant temperature heating plates can be used for heating paraffin.
In addition, after the unit piece 210 is pressed, the inner cylinder can be lifted upwards by 5mm, so that most of the bottom of the soil core is cracked first (the soil foundation is compacted, the continuity is strong, and the bottom end can be cracked when the soil foundation is pulled), and then the plastic film 300 is operated to cover the bottom of the soil core. The plastic film 300 is less worn and less prone to breakage. And even if the plastic film is damaged, the ductility of the plastic film is better, the broken hole point is generally smaller in about 2-5mm when the plastic film is actually used, and the geotechnical subgrade is compacted, the diameter of the broken block is larger by 10-30mm, so that the broken block is not easy to leak from the small damaged point. The amount of the scattered fine particles is less, and the influence on the detection is also less.
Example four
As shown in fig. 7, when the circular cable 410 is contracted to cover the soil core, the plastic film must be in contact with the soil core, and is easily worn. The cuff assembly 400 thus also includes an inner cable 430. The outer diameter of the inner cable 430 is smaller than the inner diameter of the annular cable 410, the plastic film passes through the space between the inner cable and the annular cable, the inner cable 430 and the annular cable 410 share a lantern ring, and the other end of the inner cable is also fixed with the lifting part 420; the flap 320 has an axial long slot through which the pull 420 extends.
When the plastic soil core wrapping device is used, the lifting part 420 is tensioned, the inner rope is firstly transversely inserted into the bottom of the soil core, and the plastic film only plays a role in wrapping the soil core.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A soil sampling device for highway engineering detection comprises an outer cylinder (100) and an inner cylinder (200), wherein the inner cylinder (200) is detachably fixed in the outer cylinder (100), the bottom end of the outer cylinder (100) is provided with a drilling part (110), and the drilling part (110) is used for cutting soil layers,
the inner cylinder (200) consists of 2-6 unit chips (210);
the unit slices (210) are all cylindrical slices, contact points of the top edges are hinged, and the top edges form a complete circle;
the arc length of the bottom side of the unit chip (210) is smaller than that of the top side; the lengths of the opposite planes of the two adjacent unit chips (210) are the same, and a gap is formed between the two planes;
the bottom of the inner wall of the outer cylinder (100) is provided with an annular contact ring (120), the top of the contact ring (120) is provided with a wedge head (121) matched with the bottom end of the notch, the longitudinal section of the wedge head (121) is trapezoidal, and the height of the wedge head is not more than 5 mm;
after the gap of the inner cylinder (200) is inserted into the wedge head (121), the inner wall of the inner cylinder (200) is flush with the inner wall of the abutting ring (120);
the top of the inner cylinder (200) is fixedly connected through a connecting piece (220), and the connecting piece (220) is fixedly connected with a hinge point between the unit chips (210);
the vacuum tube is characterized by further comprising a plastic film (300) which completely covers the outer wall of the inner tube (200) in the longitudinal direction, and a negative pressure tube (310), wherein one end of the negative pressure tube (310) is communicated with a negative pressure source, and the other end of the negative pressure tube is positioned between the plastic film (300) and the inner tube (200); the thickness of the plastic film (300) is within the range of 0.3-0.4 mm; the plastic film (300) is one of a PVC film, a PE film or a HDPE film;
the closing-in assembly (400) comprises an annular cable (410), the annular cable (410) surrounds the plastic film (300), the plastic film (300) is provided with a folding part (320), and the folding part (320) extends upwards from the bottom of the inner cylinder; the annular cable (410) is sleeved at the connection part between the annular cable and the part of the plastic film (300) covering inner cylinder (200); one end of the annular cable (410) is provided with a lantern ring, the other end of the annular cable extends out of the lantern ring, the extending end is fixedly connected with the lifting part (420), and the lifting part (420) is a pull rope and extends out from the position between the inner cylinder (200) and the outer cylinder (100).
2. The soil sampling device for highway engineering detection as recited in claim 1, wherein an electrothermal portion (440) is fixed on the opposite side of the annular cable (410) from the lantern ring, the electrothermal portion (440) is fixedly connected with a traction cable (450), and the traction cable (450) also extends out from between the inner cylinder and the outer cylinder; paraffin is placed between the folded part (320) and the part of the plastic film (300) covering the inner cylinder (200); the heating temperature of the electric heating part (440) is in the range of 60-65 ℃.
3. The soil sampling device for highway engineering detection as recited in claim 1, wherein the closing-in assembly (400) further comprises an inner cable (430), the outer diameter of the inner cable (430) is smaller than the inner diameter of the annular cable (410), the plastic film passes through the space between the inner cable (430) and the annular cable (410), the inner cable (430) and the annular cable (410) share a sleeve ring, and the other end of the inner cable is fixed with the lifting part (420); the flap portion (320) has an axially elongated slot through which the lift portion (420) extends.
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| CN202210418157.0A CN114518251B (en) | 2022-04-21 | 2022-04-21 | Highway engineering detects with sample device that fetches earth |
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| CN202210418157.0A CN114518251B (en) | 2022-04-21 | 2022-04-21 | Highway engineering detects with sample device that fetches earth |
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| CN114858517B (en) * | 2022-07-05 | 2022-09-09 | 山东省地质科学研究院 | Geological survey is with non-cohesive soil layer drilling sampling device |
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| CN101025412A (en) * | 2007-04-05 | 2007-08-29 | 清华大学 | Method for directly determining hydraulic parameters of solid waste for landfill field and its special equipment |
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| DE20104974U1 (en) * | 2000-12-12 | 2001-07-05 | Schoepf Alfred | Device for taking samples |
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Inventor after: Zhang Guoxing Inventor after: Zhao Chunxia Inventor after: Li Jie Inventor after: Zhai Zhenhui Inventor after: Hao Jiangsong Inventor after: Tian Jiao Inventor after: Ding Junshuang Inventor after: Zheng Jianbin Inventor after: Chai Haifeng Inventor after: Li Ling Inventor before: Zhang Guoxing Inventor before: Zhao Chunxia Inventor before: Li Jie Inventor before: Zhai Zhenhui Inventor before: Hao Jiangsong Inventor before: Tian Jiao Inventor before: Ding Junshuang Inventor before: Zheng Jianbin Inventor before: Chai Haifeng Inventor before: Li Ling |