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CN-121431139-B - Roadbed compactness detection device and method for soft soil foundation

CN121431139BCN 121431139 BCN121431139 BCN 121431139BCN-121431139-B

Abstract

The invention provides a roadbed compactness detection device and method for a soft soil foundation, and relates to the technical field of compactness detection, wherein the roadbed compactness detection device comprises a base, a cutting mechanism, a sampling mechanism, a driving mechanism, a supporting mechanism and an electronic scale, wherein a notch is formed in the middle of the base, and the cutting mechanism and the sampling mechanism reach the ground through the notch positions; the cutting mechanism can be inserted into the ground and cut the soil body, the soil body is taken out after the cutting is completed, and the sampling hole with the specified depth can be cut on the ground by cutting downwards at the same position for a plurality of times; the sampling mechanism is used for being inserted into the bottom wall of the sampling hole and sampling until reaching a specified depth, the driving mechanism is used for driving the cutting mechanism and the sampling mechanism to lift, the supporting mechanism plays a role in supporting and guiding the cutting mechanism and the sampling mechanism, and the electronic scale is placed on the base to weigh the weight of the sample. The invention facilitates sampling the middle position of the compaction layer and the bottom of the compaction layer, and reduces disturbance to soil so as to improve the accuracy of sampling.

Inventors

  • NING JIANGANG
  • WANG HAIBO
  • ZHANG BO
  • QIN YU
  • WU ZHAOJIAN
  • YANG QING
  • ZHOU LEI

Assignees

  • 四川省交通建设集团有限责任公司
  • 四川交建眉州建设有限公司

Dates

Publication Date
20260508
Application Date
20251231

Claims (9)

  1. 1. Roadbed compactness detection device for soft soil foundation, its characterized in that includes: The base (1), the bottom four corners of base (1) all are provided with gyro wheel (11), breach (12) has been seted up at the middle part of base (1); The cutting mechanism (2), the cutting mechanism (2) comprises a driving sleeve (21) and a cutting cylinder (22), the driving sleeve (21) is arranged on the upper portion of the notch (12) in a sliding mode along the vertical direction, the cutting cylinder (22) is fixedly arranged at the bottom of the driving sleeve (21) and can extend into the notch (12), and first pressing pieces (23) are arranged on two opposite sides of the top of the driving sleeve (21); The sampling mechanism (3), the sampling mechanism (3) comprises a driving rod (31) and a sampling cutting ring (32), the driving rod (31) is arranged in the driving sleeve (21) in a sliding mode, the sampling cutting ring (32) is detachably arranged at the bottom end of the driving rod (31) and located below the driving sleeve (21), second pressing pieces (33) are arranged on two opposite sides of the top end of the driving rod (31), and the second pressing pieces (33) and the first pressing pieces (23) are distributed at intervals in sequence; the driving mechanism (4), the driving mechanism (4) comprises a driving seat (41) vertically arranged on the base (1), a driving block (42) and a lifting piece (43) for driving the driving block (42) to slide along the length direction of the driving seat (41) are arranged in the driving seat (41), and a pressing component (44) is arranged on the driving block (42); The support mechanism (5), the support mechanism (5) comprises a stand column (51), a support seat (52) is arranged on the stand column (51), a rotating seat (53) is arranged on the support seat (52), the driving rod (31) is arranged in the rotating seat (53) in a sliding mode, and a rotating assembly (54) for driving the rotating seat (53) to rotate is further arranged on the support seat (52); an electronic scale (6), wherein the electronic scale (6) is arranged on the base (1) and can weigh a sample; The driving rod (31) is provided with a first limit bar (311) along the length direction of the driving rod, a first limit groove (211) for the first limit bar (311) to slide is formed in the driving sleeve (21), a second limit bar (212) is arranged outside the driving sleeve (21) along the length direction of the driving rod, and a second limit groove (531) for the second limit bar (212) to slide is formed in the rotating seat (53); The pressing assembly (44) comprises a pressing frame (441) and two pressing blocks (442), the pressing frame (441) is fixedly arranged on the driving block (42), the two pressing blocks (442) are arranged on one side, far away from the driving block (42), of the pressing frame (441), the first pressing piece (23) comprises a first connecting rod (231) and a first pressing block (232), the second pressing piece (33) comprises a second connecting rod (331) and a second pressing block (332), the bottom of the pressing block (442) is provided with a fastening block (45), and fastening grooves for inserting the fastening block (45) are formed in one sides, close to the fastening block (45), of the first pressing block (232) and the second pressing block (332).
  2. 2. The roadbed compactness detection device for soft soil foundations according to claim 1, wherein a connecting piece (34) is arranged at the top of the sampling ring cutter (32), the connecting piece (34) comprises a connecting sleeve ring (341) which is sleeved on the driving rod (31), the connecting sleeve ring (341) is arranged above the sampling ring cutter (32) and is fixedly connected with the sampling ring cutter (32) through an arc connecting rod (342), a positioning bolt (343) is arranged on the connecting sleeve ring (341), a threaded hole for inserting the positioning bolt (343) is formed in the driving rod (31), and when the connecting sleeve ring (341) is abutted against the bottom end of the driving sleeve (21), the top surface of the first pressing block (232) is flush with the top surface of the second pressing block (332), and the sampling ring cutter (32) is positioned on the upper portion of the cutting cylinder (22).
  3. 3. Roadbed compactness detection device for soft soil foundations according to claim 2, characterized in that the top of the driving sleeve (21) is provided with a strip-shaped groove (213) for the second connecting rod (331) to pass through, and the sampling ring knife (32) can be inserted into the cutting cylinder (22) when the second connecting rod (331) enters the strip-shaped groove (213).
  4. 4. The roadbed compactness detection device for soft soil foundations according to claim 1, wherein a blocking piece (24) and a pushing-out piece (25) are arranged in the cutting cylinder (22), the blocking piece (24) is used for blocking soil from entering the sampling ring cutter (32), the pushing-out piece (25) is used for pushing out cut soil out of the cutting cylinder (22), the blocking piece (24) comprises an annular step (241) and a plurality of flexible fan-shaped pieces (242), the annular step (241) is fixedly arranged on the side wall of the cutting cylinder (22), the flexible fan-shaped pieces (242) are distributed in the annular step (241) and can block the inner ring of the annular step (241), the pushing-out piece (25) comprises a pushing-out ring (251) and two pushing-out rods (252), the pushing-out rods (252) are slidably arranged on the cutting cylinder (22) and the bottom ends of the pushing-out rods (252) penetrate through the annular step (241), and the pushing-out ring (251) is fixedly arranged at one end of the pushing-out rod (252).
  5. 5. The roadbed compactness detection device for soft soil foundations according to claim 4, wherein a pressing mechanism (7) for driving the pressing rod (252) to move downwards is arranged on one side of the base (1), the pressing mechanism (7) comprises a supporting frame (71), a driving cylinder (72) and a driving frame (73) are arranged on the supporting frame (71), and the driving frame (73) comprises a pressing rod (731) and arc-shaped pressing strips (732) arranged at two ends of the pressing rod (731).
  6. 6. The roadbed compactness detection device for soft soil foundations according to claim 5, wherein an abutting piece (253) is arranged at the top of the abutting rod (252), a return spring (254) is connected between the abutting piece (253) and the cutting cylinder (22), and when the second pressing piece (33) is located right below the abutting assembly (44), two arc-shaped abutting pieces (732) are located right above the two abutting rods (252) respectively.
  7. 7. The roadbed compactness detection device for soft soil foundations according to claim 1, further comprising a receiving groove (8), wherein the receiving groove (8) comprises a fixed groove (81) and a movable groove (82), the fixed groove (81) is fixed on the base (1), the movable groove (82) is slidably arranged on the fixed groove (81) and can extend into the notch (12), and a rodless cylinder (83) for driving the movable groove (82) to move is arranged on one side of the fixed groove (81).
  8. 8. The roadbed compactness detection device for soft soil foundations according to claim 2, wherein one side of the supporting seat (52) far away from the rotating seat (53) is slidably provided with a mounting rod (55) for mounting the sampling ring cutter (32), a threaded hole for inserting a positioning bolt (343) is formed in the mounting rod (55), a scraping frame (56) is arranged on the upright post (51), scraping plates (561) are arranged on the upper side and the lower side of the scraping frame (56), the bottom surface of the scraping plate (561) on the upper portion is flush with the top surface of the sampling ring cutter (32), the top surface of the scraping plate (561) on the lower portion is flush with the bottom surface of the sampling ring cutter (32), and a transverse moving electric cylinder (57) for driving the mounting rod (55) to move towards a direction close to or far away from the scraping frame (56) is arranged on the supporting seat (52).
  9. 9. A detection method using the roadbed compactness detection device for soft soil foundations as claimed in any one of claims 1 to 8, comprising the steps of: S1, pushing a base (1) to a position to be sampled, pressing a driving sleeve (21) through a pressing component (44) to drive a cutting cylinder (22) to be inserted into the ground, driving a rotating seat (53) to rotate through a rotating component (54) to drive a cutting mechanism (2) to integrally rotate, driving the cutting mechanism (2) to leave the ground through a driving mechanism (4) to take out a cut soil body, and repeating the steps, cutting the ground to a specified depth each time and taking out the cut soil body until a sampling hole of the specified depth is cut; S2, inserting the cutting mechanism (2) into the sampling hole again, driving the rotating seat (53) to rotate through the rotating assembly (54), enabling the second pressing piece (33) at the top end of the sampling rod to be aligned with the pressing assembly (44) of the driving block (42), and pressing the sampling ring cutter (32) through the pressing assembly (44) so as to enable the sampling ring cutter (32) to enter a designated depth in the sampling hole; S3, driving the cutting mechanism (2) and the sampling mechanism (3) to move out of the sampling hole through the driving mechanism (4), taking down a connecting piece (34) on the sampling ring cutter (32) from the driving rod (31) after moving out, and then taking out the cut soil body from the cutting cylinder (22) integrally, wherein the sampling ring cutter (32) is positioned in the cut soil body; S4, cleaning up soil outside the sampling ring cutter (32), then scraping off redundant soil on the upper part and the lower part of the sampling ring cutter (32), and finally placing the residual soil inside the sampling ring cutter (32) into an electronic scale (6) for weighing; S5, dividing the weighed mass by the volume of the sampling ring cutter (32) to obtain the wet density of the soil sample, calculating the dry density of the soil sample according to the water content, and comparing the dry density with the maximum dry density measured in a laboratory to obtain the actual compactness.

Description

Roadbed compactness detection device and method for soft soil foundation Technical Field The invention relates to the technical field of compactness detection, in particular to a roadbed compactness detection device and method for a soft soil foundation. Background The spliced wide roadbed is a key link in road widening engineering, and the road width is increased on one side or two sides of the original roadbed by filling new soil, paving structural layers and the like so as to meet the requirements of traffic flow increase or function improvement. The spliced wide roadbed is usually soft soil, and needs to be compacted in advance for subsequent construction. After the soft soil foundation is compacted, compaction degree detection is needed to ensure that the compaction degree of the foundation reaches the standard, and the most common mode for detecting the soft soil foundation is a ring cutter method, namely cutting the soft soil foundation into soil by using a ring cutter to sample, weighing the mass of a soil sample, measuring the water content, and calculating the dry density and the compaction degree. When the compaction degree of the conventional foundation is detected, the ground after compaction is only required to be sampled and detected, and when the soft soil foundation is used, the ground is required to be sampled, and the middle position of the compaction layer and the bottom of the compaction layer are required to be sampled. Therefore, when sampling the soft soil foundation, a pit with a specified depth needs to be dug on the ground, and then a worker enters the pit to sample by using a cutting ring. On one hand, the size of the excavated pit needs to be used for the entry of workers, the excavation and subsequent backfilling workload is large, and on the other hand, the soil body in the foundation is easily disturbed in the excavation process, so that the sampling accuracy is affected. Disclosure of Invention The invention aims to provide a roadbed compactness detection device and a roadbed compactness detection method for a soft soil foundation, which are characterized in that a cutting mechanism is used for cutting downwards at the same position on the ground for a plurality of times to form a sampling hole with a specified depth, and then the sampling hole is filled with the sampling mechanism for sampling, so that the middle position of a compacting layer and the bottom of the compacting layer are conveniently sampled, the workload in the sampling process is reduced, meanwhile, the disturbance to soil is reduced, and the sampling accuracy is improved. The invention is realized by the following technical scheme that the roadbed compactness detection device for the soft soil foundation comprises: The base is characterized in that idler wheels are arranged at four corners of the bottom of the base, and a notch is formed in the middle of the base; the cutting mechanism comprises a driving sleeve and a cutting cylinder, the driving sleeve is arranged at the upper part of the notch in a sliding manner along the vertical direction, the cutting cylinder is fixedly arranged at the bottom of the driving sleeve and can extend into the notch, and first pressing pieces are arranged at two opposite sides of the top of the driving sleeve; the sampling mechanism comprises a driving rod and a sampling cutting ring, the driving rod is arranged in the driving sleeve in a sliding manner, the sampling cutting ring is detachably arranged at the bottom end of the driving rod and positioned below the driving sleeve, second pressing pieces are arranged on two opposite sides of the top end of the driving rod, and the second pressing pieces and the first pressing pieces are sequentially distributed at intervals; the driving mechanism comprises a driving seat vertically arranged on the base, a driving block and a lifting piece for driving the driving block to slide along the length direction of the driving seat are arranged in the driving seat, and a pressing assembly is arranged on the driving block; The support mechanism comprises an upright post, a support seat is arranged on the upright post, a rotating seat is arranged on the support seat, the driving rod is arranged in the rotating seat in a sliding manner, and a rotating assembly for driving the rotating seat to rotate is further arranged on the support seat; the electronic scale is arranged on the base and can weigh the sample; The driving rod is provided with a first limit groove along the length direction of the driving rod, a first limit groove for the first limit groove to slide is formed in the driving sleeve, a second limit groove for the second limit groove to slide is formed in the outer portion of the driving sleeve along the length direction of the driving rod, and a second limit groove for the second limit groove to slide is formed in the rotating seat. Further, the pressing assembly comprises a pressing frame and two pressing blocks, the press