Rapid measuring device for dry density of roadbed

Abstract

The utility model provides a rapid measuring device for the dry density of a roadbed. The rapid measuring device comprises a soil sampler, a soil squeezing pipe and a bottom plate, the soil sampler is detachably mounted on the bottom plate through a connecting piece; the soil sampler is in a hollow circular truncated cone shape so as to rapidly drill into soil, and the power equipment is connected with the soil sampler and transmits power to the soil sampling pipe to enable the soil sampling pipe to rotate and drill into the soil; the soil squeezing pipe is inserted into the hollow circular truncated cone of the soil sampler, the heating device heats the interior of the soil squeezing pipe to evaporate moisture of a soil body, and the dry density of the soil body is determined by measuring the mass change of the whole system. The utility model provides efficient and accurate soil body dry density measuring equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of geotechnical testing, in particular to a device for quickly measuring the dry density of a roadbed. Background Art

[0002] Along my country's southeastern coastal areas, soft, silty soils, deposited in marine, lacustrine, and river phases, are widespread. Common characteristics of soft silty soils include high natural moisture content, low permeability, high compressibility, low bearing capacity, and low shear strength. Silt solidification technology, which enhances the strength of soft soils by adding a solidifying agent, has gained widespread adoption due to its simplicity, high construction efficiency, and reasonable cost. The treated solidified soil can be used as roadbed filler, but density testing of the compacted soil is required to calculate the compaction degree of roadbed filler. Unlike traditional roadbed fillers, the solidifying agent's reaction is time-dependent, and the moisture content of the solidified soil changes rapidly, especially in the early stages of the reaction. Therefore, the density of the solidified soil is time-sensitive. Furthermore, during construction, workers need timely soil compaction data to determine whether recompaction is necessary. However, geotechnical testing commonly used in road construction requires taking soil samples back to the laboratory, where the moisture content is measured by drying to determine the dry density. This method does not provide instantaneous results, resulting in inaccurate results and impacting construction efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a device for quickly measuring the dry density of roadbed in order to solve the problems in the prior art.

[0004] To this end, the above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0005] A device for quickly measuring dry density of roadbed, characterized by comprising: a soil sampler, a soil squeezing pipe and a bottom plate; the soil sampler is detachably mounted on the bottom plate via a connecting piece;

[0006] The soil extractor is in the shape of a hollow truncated cone and can quickly drill into the soil. The power device is connected to the soil extractor and transmits power to the soil extractor tube to rotate it and drill into the soil.

[0007] The soil squeezing tube is inserted into the hollow truncated cone of the soil sampler. The heating device heats the soil squeezing tube to evaporate the moisture in the soil. The dry density of the soil is determined by measuring the mass change of the entire system.

[0008] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0009] As the preferred technical solution of the present utility model: the connecting part includes two ear-type connecting plates with threaded circular holes welded on the outer wall of the soil sampler, the diameter of the upper bottom surface is D, which is consistent with the size of the connection part of the pressure equipment equipped with the soil sampler, the diameter of the lower bottom surface of the soil sampler is 2 / 3D, the height is 1.5D, and the thickness is between 0.05D and 0.1D. The aperture of the threaded circular hole is the diameter of the corresponding pressure equipment bolt.

[0010] As the preferred technical solution of the utility model: the soil squeezing pipe has a solid lower bottom, a hollow upper bottom and an interior cylindrical shape, a diameter of the cylinder is 1 / 2D, a height is 2D, a thickness is between 0.025D ​​and 0.05D, and is made of high-temperature resistant material.

[0011] As a preferred technical solution of the present invention: the bottom plate is provided with a groove, and the groove is connected to the bottom of the soil extractor to prevent the soil from being pressed out from the bottom of the soil extractor when the soil squeezing pipe presses the soil.

[0012] As the preferred technical solution of the present invention: the bottom plate is a solid disc with a circular groove and two connecting rods. The diameter of the disc is 2D, the thickness is between 0.1D and 0.2D, the diameter of the groove is D, and the height is between 0.05D and 0.1D.

[0013] As a preferred technical solution of the present utility model: the base plate is provided with a connecting rod with a thread, and the connecting rod is connected to the soil extractor to fix the soil extractor on the base.

[0014] As a preferred technical solution of the present invention: the connecting rod includes a smooth connecting rod fixed on the base plate and a connecting rod with threads, and the connecting rod with threads is connected with the connecting piece to fix the soil extractor and the base plate.

[0015] Compared with the existing technology, the utility model of a rapid determination device for dry density of roadbed has the following beneficial effects: by utilizing the cooperation of the soil sampler, the soil squeezing tube and the base plate, the soil dry density can be quickly determined by the soil squeezing tube after the soil sampler completes the sampling, thereby greatly improving work efficiency; it changes the situation where traditional geotechnical test devices cannot conduct on-site tests, and enables direct testing on-site, avoiding measurement errors caused by changes in soil structure during transportation; it has high accuracy, and the device can obtain accurate data on the compaction degree of solidified soil in a timely manner, so that staff can make corresponding adjustments and optimizations to on-site construction based on these data, thereby improving overall construction efficiency and quality.

[0016] The utility model discloses a device for quickly measuring the dry density of roadbed, which can quickly heat the soil after sampling, and can complete the test operation of measuring the dry density of soil on site, so that the instantaneous compaction degree of soil can be obtained at the first time. It effectively solves the problem that conventional geotechnical test equipment cannot be used for on-site testing, and the density measurement of solidified soil may have errors due to age reaction and environmental changes. It provides an efficient and accurate soil dry density measuring device, which has great application prospects in the field of geotechnical testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a soil sampler of a device for quickly measuring dry density of roadbed according to the present utility model;

[0018] Figure 2 This is a front view of a soil sampler of a device for quickly measuring dry density of roadbed according to the present utility model;

[0019] Figure 3 This is a left side view of a soil sampler of a device for quickly measuring dry density of roadbed according to the present utility model;

[0020] Figure 4 This is a top view of a soil sampler of a device for quickly measuring dry density of roadbed according to the present utility model;

[0021] Figure 5 The utility model is a schematic diagram of the structure of a soil squeezing pipe of a device for quickly measuring the dry density of a roadbed.

[0022] Figure 6 The utility model is a front view of a soil squeezing pipe of a device for quickly measuring dry density of roadbed.

[0023] Figure 7 This is a left view of a soil squeezing pipe of a device for quickly measuring dry density of roadbed according to the utility model.

[0024] Figure 8 The utility model is a top view of a soil squeezing pipe of a device for quickly measuring dry density of roadbed.

[0025] Figure 9 The utility model is a schematic structural diagram of the base of a device for quickly measuring the dry density of a roadbed.

[0026] Figure 10 The utility model is a front view of the base of a device for quickly measuring the dry density of roadbed.

[0027] Figure 11 The utility model is a left view of the base of a device for quickly measuring the dry density of roadbed.

[0028] Figure 12 The utility model is a top view of the base of a device for quickly measuring the dry density of roadbed.

[0029] Figure 13 The utility model is a structural schematic diagram of a device for quickly measuring dry density of roadbed when in use.

[0030] Figure 14 This is a front view of the structure of a device for quickly measuring dry density of roadbed according to the utility model when in use.

[0031] Figure 15 This is a left side view of the structure of a device for quickly measuring dry density of roadbed according to the utility model when in use.

[0032] Figure 16 The utility model is a top view of the structure of a device for quickly measuring dry density of roadbed when in use.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0034] 1- soil extractor, 2- ear-hanging connecting piece, 3- threaded round hole, 4- soil squeezing pipe, 5- solid bottom of soil squeezing pipe, 6- base, 7- fixing groove, 8- smooth connecting rod, 9- threaded connecting rod. DETAILED DESCRIPTION

[0035] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0036] The present utility model aims to overcome the problem of traditional methods for measuring roadbed fill density, which cannot quickly measure the density of solidified soil. It provides a device for quickly determining the dry density of roadbed filler. Soil is collected using a soil collector, and the soil is dried using a heated soil extrusion tube. Finally, the mass of the device and the soil before and after heating is weighed, and the instantaneous dry density of the solidified soil is calculated using a formula. To achieve this objective, the present utility model provides the following technical solutions.

[0037] A device for quickly measuring the dry density of a roadbed comprises a soil taker, a soil squeezing pipe and a bottom plate; the soil taker is connected to a power device when taking soil and is connected to the bottom plate when squeezing soil.

[0038] The power equipment includes excavation drill bits, etc.

[0039] Furthermore, the soil sampler is designed as a hollow cone for obtaining test soil samples; the diameter D of the upper bottom surface is consistent with the size of the connection part of the pressure equipment, the diameter of the lower bottom surface is 2 / 3D, the height is 1.5D, and the thickness is between 0.05D and 0.1D.

[0040] Pressure equipment is used to measure and control soil compaction in roadbed dry density testing, including static pile drivers or other related compaction machinery.

[0041] Furthermore, the soil sampler is provided with a connecting piece, and two ear-type connecting pieces with circular holes are welded on the outer wall of the connecting piece, which are used to connect the pressure equipment and the base plate; the diameter of the circular hole is the diameter of the corresponding pressure equipment bolt.

[0042] Furthermore, the soil squeezing pipe is designed as a cylinder with a solid bottom and a hollow top and interior, and is made of high-temperature resistant material to serve as a medium for heating the soil; the diameter of the cylinder is 1 / 2D, the height is 2D, and the thickness is between 0.025D ​​and 0.05D.

[0043] Furthermore, the base plate is designed as a solid disc with a circular groove and two connecting rods, which is used to fix the soil extractor when the soil extrusion pipe squeezes soil inside the soil extractor to prevent the soil from being squeezed out from the bottom of the soil extractor; the diameter of the disc is 2D and the thickness is between 0.1D and 0.2D.

[0044] Furthermore, the groove is used to clamp the bottom of the soil extractor to prevent the soil from squeezing out of the soil extractor when being squeezed by the soil squeezing tube; the diameter of the groove is D, and the height is between 0.05D and 0.1D.

[0045] Furthermore, the connecting rod is used to fix the circular hole of the connecting piece on the outer wall of the soil extractor to the outer wall of the soil extractor to fix the soil extractor; the connecting rod is divided into a threaded connecting rod and a smooth connecting rod, and the diameter of the threaded connecting rod is consistent with the diameter of the threaded circular hole of the connecting piece on the outer wall of the soil extractor.

[0046] Beneficial effects of the utility model:

[0047] This device for measuring the dry density of solidified soil can quickly heat the soil after sampling, allowing on-site dry density measurements to be completed. This allows for immediate determination of soil compaction, effectively resolving issues such as the inability to conduct on-site tests with conventional geotechnical testing equipment and errors in solidified soil density measurements due to age-related reactions and environmental changes. Furthermore, by providing timely and accurate data on the compaction of solidified soil, workers can more quickly adjust and optimize on-site construction, improving overall efficiency.

[0048] Example 1

[0049] like Figures 1-4 As shown, the height of the earth-picking vessel 1 is h1, the inner diameter of the upper base is r1, the inner diameter of the lower base is r2, and the volume V1 is πh1(r1 2 +r1r2+r2 2 The soil sampler 1 is connected to the pressure equipment through the threaded circular hole 3 in the ear-hanging connecting piece 2 to obtain the test soil sample.

[0050] like Figure 5-Figure 8As shown, the soil squeezing tube 4 has a height of h2, an inner diameter of r3, and a mass of m2. The soil squeezing tube 4 is a cylinder with a solid bottom and a hollow top and interior. During the test, soil is squeezed through the solid bottom 5 of the soil squeezing tube to the surface of the soil sampler. Then, a heating device heats the interior of the soil squeezing rod 4, evaporating moisture from the soil.

[0051] like Figures 9-16 As shown, the bottom plate 6 is provided with a groove 7 for connecting to the bottom of the soil extractor 1 to prevent the soil from being pressed out from the bottom of the soil extractor 1 by the soil squeezing pipe 4 when pressing the soil. The threaded circular hole 3 on the soil extractor is connected through a threaded connecting rod 9 to further fix the soil extractor 1 on the base 6.

[0052] like Figure 13 As shown, the soil sampler 1 is fixed at the position of the bottom plate 6 after taking the soil sample, and the depth of the soil squeezing tube 4 inserted into the soil sampler 1 is h3, then the volume V2 of the soil squeezing tube 4 inside the soil sampler 1 is πh3r3 2 The soil is squeezed onto the surface of the soil sampler through the solid bottom 5 of the soil pressing rod and leveled with a scraper. The volume V3 of the test soil in the soil sampler 1 is V1-V2. The soil sampler 1 and the soil squeezing tube 4 are removed from the base plate 6. After the soil on the bottom surface of the soil sampler 1 is leveled, it is placed on a balance and the total mass is weighed as m3. The mass m4 of the test soil in the soil sampler 1 is m3-m1-m2.

[0053] Heat the interior of the soil pressing rod 4 with a heating device to evaporate the moisture in the soil. Weigh the total mass of the soil sampler 1, the soil squeezing tube 4, and the dried soil. Repeat these heating and weighing steps until the total mass remains stable and is recorded as m5. The mass of moisture in the test soil, m6, is then m4 - m5, the moisture content is m6 / m5, and the dry density is m5 / V3.

[0054] The utility model discloses a device for quickly determining the dry density of roadbed, which relates to geotechnical testing technology. It comprises a soil sampler, a soil squeezing pipe and a base plate. The soil sampler is designed as a hollow truncated cone, with two ear-type connecting pieces with threaded circular holes welded to the outer wall; the soil squeezing pipe is designed as a cylinder with a solid lower bottom and a hollow upper bottom and interior; the base plate is designed as a solid disc with grooves and two connecting rods. The soil sampler is connected to the pressure equipment through the reserved threaded circular holes when taking soil, and is connected to the connecting rod of the base plate when squeezing soil. The test soil is heated through the soil squeezing pipe, and finally the mass of the device and the soil before and after heating is weighed, and the instant dry density of the solidified soil is calculated according to the formula. The utility model solves the problem that the compaction degree of solidified soil roadbed filler at a specific reaction age cannot be measured in time due to limitations of on-site conditions during the construction of solidified soil roadbed.

[0055] The above-mentioned specific implementation methods are used to explain the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Within the spirit of the present invention and the scope of protection of the claims, any modifications, equivalent replacements, improvements, etc. made to the present invention shall fall within the scope of protection of the present invention.

Claims

1. A device for quickly measuring the dry density of roadbed, characterized by: It includes a soil excavator, a soil squeezing pipe and a base plate; the soil excavator can be detachably mounted on the base plate through a connecting piece; The soil extractor is in the shape of a hollow truncated cone and can quickly drill into the soil. The power device is connected to the soil extractor and transmits power to the soil extractor tube to rotate it and drill into the soil. The soil sampler is inserted into the soil squeezing tube and extends into its hollow cone, and the soil sampler takes out a soil sample from the soil; the soil squeezing tube is inserted into the hollow cone of the soil sampler so that the soil squeezing tube and the soil sample are in full contact, and a heating device is used to heat the inside of the soil squeezing tube to evaporate the moisture of the soil sample, and the mass of the moisture in the soil is calculated by measuring the mass difference of the roadbed dry density rapid determination device, thereby realizing the rapid determination of the soil dry density.

2. A device for rapidly measuring dry density of roadbed according to claim 1, characterized in that: The connecting part includes two ear-type connecting plates with threaded circular holes welded to the outer wall of the soil sampler. The diameter of the upper bottom surface is D, which is consistent with the size of the connection part of the pressure equipment equipped with the soil sampler. The diameter of the lower bottom surface of the soil sampler is 2 / 3D, the height is 1.5D, and the thickness is between 0.05D and 0.1D. The aperture of the threaded circular hole is the diameter of the corresponding pressure equipment bolt.

3. A device for rapidly measuring dry density of roadbed according to claim 1, characterized in that: The soil squeezing pipe has a solid lower bottom and a hollow upper bottom and interior. The cylinder has a diameter of 1 / 2D, a height of 2D, and a thickness between 0.025D ​​and 0.05D and is made of high-temperature resistant material.

4. A device for rapidly measuring dry density of roadbed according to claim 1, characterized in that: The bottom plate is provided with a groove, which is matched with the bottom of the soil extractor to prevent the soil from being pressed out from the bottom of the soil extractor when the soil squeezing pipe presses the soil.

5. A device for rapidly measuring dry density of roadbed according to claim 4, characterized in that: The bottom plate is a solid disc with a circular groove and two connecting rods. The diameter of the disc is 2D, and the thickness is between 0.1D and 0.2D. The diameter of the groove is D, and the height is between 0.05D and 0.1D.

6. A device for rapidly measuring dry density of roadbed according to claim 4, characterized in that: The bottom plate is provided with a connecting rod with a thread, and the connecting rod is connected to the soil extractor to fix the soil extractor on the base.

7. A device for quickly measuring dry density of roadbed according to claim 6, characterized in that: The connecting rod comprises a smooth connecting rod fixed on the bottom plate and a connecting rod with threads, and the connecting rod with threads is matched with the connecting piece to fix the soil extractor and the bottom plate.

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