Disassembly type automatic drop hammer dynamic sounding detection device

Abstract

The utility model discloses a decomposition type automatic drop hammer dynamic sounding detection device, which relates to the technical field of geotechnical engineering investigation and foundation detection, and comprises a bottom plate, walking wheels are rotatably connected to four corners of the lower end of the bottom plate, a winch is connected to one side of the bottom plate through bolts, and the bottom end of a stand column is connected with the bottom plate through bolts. The sliding sleeve is connected to the outer side of the stand column through a bolt, one side of the sliding sleeve is connected with a guide sleeve through a connecting rod, the top end of the stand column is fixedly connected with a top plate, and the two ends of the top plate are rotationally connected with two fixed pulleys; a gravity hammer is connected to the guide rod in a sliding mode, a grabbing groove matched with the grabbing device is formed in the gravity hammer, a clamping step is arranged at the upper end of the grabbing groove, hammer falling is completed in the grabbing device through sliding and rolling of balls, the hammer falling height is guaranteed, and the perpendicularity of the sounding rod is guaranteed by installing a gradienter on the bottom plate; the transportation is convenient after decomposition.

Description

Technical Field

[0001] The utility model relates to the technical fields of geotechnical engineering investigation and foundation inspection, and particularly relates to a disassembled automatic drop hammer dynamic penetration detection device. Background Technique

[0002] A dynamic penetrometer is an instrument for detecting the bearing capacity of a foundation. According to the size of the detected foundation bearing capacity, it is divided into a light dynamic penetrometer and a heavy dynamic penetrometer.

[0002]

[0003] Article 8.3.4, Item 2 of the Technical Code for Building Foundation Inspection JGJ340-2015 stipulates that the cone dynamic penetration should adopt the regulation of automatic drop hammer; at the same time, there are also relevant regulations for the standard penetration test instrument: the test should be carried out by the automatic drop hammer method for hammering.

[0004] The traditional heavy dynamic penetrometer is a manual hammer, which relies on manual lifting and dropping of the hammer at a short distance by hand; the following problems exist:

[0003]

[0005] 1. Measurement error: The traditional use of manual operation at a short distance for dynamic penetration detection cannot guarantee personal safety, the verticality of the sounding rod cannot be guaranteed, the detection rate cannot meet the specification requirements (15-30) blows / min, the hammering height cannot meet the specification requirements, and the consistency is poor. These problems may lead to certain measurement errors in the penetration data, affecting the accuracy of the judgment of the mechanical properties of the foundation soil.

[0006] 2. The equipment is bulky: Some devices are large in volume and heavy in weight, making it difficult to carry and install at the construction site, reducing work efficiency.

[0004]

[0007] 3. Using an exploration drill to cooperate with dynamic penetration detection increases the transportation cost and correspondingly increases the detection cost. It is difficult for vehicles to transport in mountainous areas with complex terrains. Content of the Utility Model

[0008] The purpose of the utility model is to solve the problems of insecurity in manually lifting and dropping the hammer at a short distance during the traditional manual detection process, inability to guarantee the lifting rate, and inconvenience in use in complex environments.

[0005]

[0009] The disassembled automatic drop hammer dynamic penetration testing device includes a bottom plate, on which a level is installed. At the four corners of the lower end of the bottom plate, walking wheels are rotatably connected. Four adjusting feet are threadedly connected to the bottom end of the bottom plate. The winch is bolted to one side of the bottom plate. The bottom end of the column is bolted to the bottom plate. The sliding sleeve is bolted to the outside of the column. One side of the sliding sleeve is connected to a guiding sleeve through a connecting rod. The top end of the column is fixedly connected to a top plate. Two fixed pulleys are rotatably connected to both ends of the top plate. The probe at the lower end of the sounding rod contacts the ground. The upper part of the sounding rod passes through the guiding sleeve and is connected to the guiding rod through a connecting sleeve. A gravity hammer is slidably connected to the guiding rod. A grabbing groove matching with the grabber is provided on the gravity hammer. A clamping step is provided at the upper end of the grabbing groove. The top end of the guiding rod is fixedly connected to a guide rope seat. The grabber is slidably connected to the outer wall of the guiding rod. Two guiding holes are provided on the guide rope seat;

[0010] The guiding rod includes a guiding thick rod and a guiding thin rod connected to the upper end of the guiding thick rod;

[0011] The grabber includes inner balls, outer balls, an inner shell and an outer shell. Two lifting lugs are fixedly connected to the upper end of the inner shell. The upper part of the outer side of the inner shell is thin and the lower part is thick. The upper part of the inner side of the outer shell is thin and the lower part is thick. The outer diameter of the lower end of the inner shell is larger than the inner diameter of the upper end of the outer shell. The outer shell is axially limited and slidable on the outside of the inner shell. Inner accommodating grooves and outer accommodating grooves are respectively provided on the inner shell and the outer shell. The inner balls and the outer balls are respectively embedded in the inner accommodating grooves and the outer accommodating grooves and can move left and right in the inner accommodating grooves and the outer accommodating grooves but will not fall out;

[0012] The head end of the towing rope is wound around the rotating shaft of the winch. The tail end of the towing rope passes through the two fixed pulleys and is divided into two thin ropes. After passing through the guiding holes on the guide rope seat, the two thin ropes are fixedly connected to the lifting lugs on the inner shell.

[0013] Preferably, the column is formed by inserting a group of short rods and splicing them together with bolts.

[0014] The beneficial effects of the utility model:

[0015] The disassembled automatic drop hammer dynamic penetration testing device has modified the winch to meet the requirement of the hammering rate (15 - 30 blows / min) specified in the standard; variable diameter treatment is carried out on the guiding rod connecting the sounding rod, and the falling hammer is completed by the sliding and rolling of the balls in the grabber, ensuring the falling hammer height; by installing a level on the bottom plate, the verticality of the sounding rod is ensured; after disassembly, it is convenient for transportation, does not require large vehicles, saving the test cost. In case of complex mountainous terrain where vehicles are difficult to enter, it can be manually carried to the test point for assembly work;

[0016] Through field tests, the device has greatly improved the working efficiency, stability and the accuracy of data collection, providing reliable data support for the project and meeting the requirements of the standard. Description of the Drawings

[0017] Figure 1 is a schematic structural view of the utility model;

[0018] Figure 2 is a perspective view of the connection structure between the gripper and the gravity hammer;

[0019] Figure 3 is a cross-sectional view of the connection between the lifting lug and the inner shell;

[0020] Figure 4 is a cross-sectional view of the outer ball embedded in the outer shell;

[0021] Figure 5 is a cross-sectional view of the gripper slidably connected to the guide rod;

[0022] Figure 6 is a schematic diagram of the movement of the outer ball towards the inner ball;

[0023] In the figure: 1: bottom plate; 2: adjusting foot; 3: sounding rod; 4: guide sleeve; 5: gravity hammer; 6: gripper; 7: guide rope seat; 8: towing rope; 9: top plate; 10: column; 11: sliding sleeve; 12: winch; 13: lifting lug; 14: connecting sleeve; 15: gripping groove; 16: traveling wheel; 17: guide rod; 18: inner ball; 19: outer ball; 20: inner shell; 21: outer shell. Specific embodiments

[0024] Referring to the attached drawings, a disassembled automatic drop hammer dynamic penetration testing device includes a bottom plate 1. A level (prior art, not shown in the figure) is installed on the bottom plate 1. Traveling wheels 16 are rotatably connected to the four corners at the lower end of the bottom plate 1. Four adjusting feet 2 are threadedly connected to the bottom end of the bottom plate 1. The winch 12 is bolted to one side of the bottom plate 1. The bottom end of the column 10 is bolted to the bottom plate 1. The sliding sleeve 11 is bolted to the outside of the column 10. One side of the sliding sleeve 11 is connected to the guide sleeve 4 through a connecting rod. The top end of the column 10 is fixedly connected to the top plate 9. Two fixed pulleys are rotatably connected to both ends of the top plate 9. The lower end probe of the sounding rod 3 contacts the ground. The upper part of the sounding rod 3 passes through the guide sleeve 4 and is connected to the guide rod 17 through the connecting sleeve 14. The gravity hammer 5 is slidably connected to the guide rod 17. The gravity hammer 5 is provided with a gripping groove 15 that cooperates with the gripper 6. A clamping step is provided at the upper end of the gripping groove 15. The top end of the guide rod 17 is fixedly connected to the guide rope seat 7. The gripper 6 is slidably connected to the outer wall of the guide rod 17. Two guide holes are provided on the guide rope seat 7;

[0025] The guide rod 17 includes a guide thick rod and a guide thin rod connected to the upper end of the guide thick rod;

[0026] The gripper 6 includes an inner ball 18, an outer ball 19, an inner shell 20 and an outer shell 21. Two lifting lugs 13 are fixedly connected to the upper end of the inner shell 20. The upper part of the outer side of the inner shell 20 is thin and the lower part is thick. The upper part of the inner side of the outer shell 21 is thin and the lower part is thick. The outer diameter of the lower end of the inner shell 20 is larger than the inner diameter of the upper end of the outer shell 21. The outer shell 21 is axially limited and slides on the outside of the inner shell 20 (the outer shell 21 can only slide axially relative to the inner shell 20 and cannot rotate circumferentially). An inner receiving groove and an outer receiving groove are respectively provided on the inner shell 20 and the outer shell 21. The inner ball 18 and the outer ball 19 are respectively embedded in the inner receiving groove and the outer receiving groove and can move left and right in the inner receiving groove and the outer receiving groove but will not fall out.

[0027] The head end of the towing rope 8 is wound around the rotating shaft of the winch 12. The tail end of the towing rope 8 passes through two fixed pulleys and then is divided into two thin ropes, which pass through the guiding holes on the rope guiding seat 7 and are fixedly connected to the lifting lugs 13 on the inner shell 20.

[0028] Furthermore, the upright column 10 is formed by inserting a group of short rods and splicing them together with bolts.

[0029] The working principle of the present utility model:

[0030] Move to the location to be surveyed, rotate the adjusting floor bolt 2 and cooperate with the level to level the entire detection device. When used for the first time, rely on the outer ball 19 to move to the left and be clamped on the clamping step of the grasping groove 15 to realize the connection between the gripper 6 and the gravity hammer 5. The winch 12 rotates forward, and the towing rope 8 is lifted upward. When the gripper 6 is lifted to the guiding thin rod, the inner ball 18 will be squeezed and move to the right, and the gripper 6 is separated from the gravity hammer 5. The winch 12 stops rotating, and the gravity hammer 5 hammers the connecting sleeve 14 to realize the downward movement of the sounding rod 3. Immediately afterwards, the winch 12 rotates in the reverse direction to realize the reconnection between the gripper 6 and the gravity hammer 5. Reciprocate according to the above process until the survey requirements are met. The specific connection process is as follows:

[0031] The extraction process of the gravity hammer 5:

[0032] Since the inner ball 18 squeezes the outer ball 19 to move to the left, a part of the outer ball 19 is exposed outside the outer receiving groove and is clamped on the clamping step of the grasping groove 15. As the winch 12 rotates forward, the towing rope 8 is stressed to lift the gravity hammer 5 and the gripper 6 upward along the guiding thick rod. When the inner ball 18 moves to the guiding thin rod, the lower end of the inner shell 20 is still limited and slides on the guiding thick rod. Under the action of gravity, the clamping step of the gravity hammer 5 squeezes the outer ball 19 to the right, and the outer ball 19 squeezes the inner ball 18 to the right. Since the inner ball 18 is currently at the guiding thin rod, the inner ball 18 can continue to move to the right, and the gravity hammer 5 realizes free fall, thereby separating the gripper 6 from the gravity hammer 5;

[0033] The falling process of the gravity hammer 5:

[0034] The part of the outer ball 19 exposed outside the receiving groove will get stuck at the upper end of the gravity hammer 5, and the outer shell 21 cannot move downward. The inner shell 20 continues to move downward. The part of the outer ball 19 exposed outside the receiving groove is squeezed by the upper end of the gravity hammer 5 and moves to the right. The outer ball 19 completely enters the inner part of the outer receiving groove, and the outer shell 21 moves downward. The outer shell 21 and the inner shell 20 completely enter the grasping groove 15;

[0035] When waiting for the next extraction by the gravity hammer 5, the inner ball 18 squeezes the outer ball 19 to move to the left again. A part of the outer ball 19 is exposed outside the outer receiving groove again and is clamped on the clamping step of the grasping groove 15.

[0036] By changing the size of the guide rod 17, the automatic dropping of the gravity hammers 5 with different weights of N10, N63.5, and N120 is realized. The free-falling height of the hammer is not affected by humans. The working performance is stable, the data is accurate, and it is fast and efficient. While meeting the specification requirements, the mechanized and standardized cone penetration test is realized, greatly reducing the labor intensity and improving the work efficiency;

[0037] The disassembled automatic dropping hammer dynamic penetration detection device is widely and conveniently used for the detection and test work of foundation soil or reinforcement in industries such as construction, municipal engineering, highway, railway, and water conservancy. The light dynamic penetration test (N10) is applicable to evaluate the properties of foundation soil, the effect of foundation treatment, and the determination of foundation bearing capacity of cohesive soil, silt, silty sand, and fine sand foundation and its artificial foundation; the heavy dynamic penetration test (N63.5) is applicable to evaluate the properties of foundation soil, the effect of foundation treatment, and the determination of foundation bearing capacity of cohesive soil, silt, sand, gravel soil below medium density, and its artificial foundation and extremely soft rock; it can also be used to test the pile-forming quality, treatment effect of sand-gravel piles and cement mixing piles, jet grouting piles, lime soil piles, rammed cement soil piles, and grouting-reinforced foundations in the initial setting state, as well as to evaluate the effect of dynamic compaction replacement and the bottom landing situation of replacement piers; the super-heavy dynamic penetration test (N120) is applicable to evaluate the properties of foundation soil such as dense gravel soil, extremely soft rock, and soft rock and the determination of foundation bearing capacity, and can also be used to evaluate the effect of dynamic compaction replacement and the bottom landing situation of replacement piers.

[0038] The utility model solves the problems of high cost in using exploration drills to cooperate with dynamic penetration detection tests and difficult vehicle transportation in mountainous areas; it solves the problems of safety in traditional manual lifting and dropping of hammers at close range by humans and the inability to guarantee the lifting rate. Each component of the device can be disassembled, which is convenient for transportation and assembly.

Claims

1. The disassembled automatic drop hammer dynamic penetration testing device is characterized in that: It includes a bottom plate, on which a spirit level is installed. At the four corners of the lower end of the bottom plate, walking wheels are rotatably connected. Four adjusting feet are threadedly connected to the bottom end of the bottom plate. A winch is bolted to one side of the bottom plate. The bottom end of the column is bolted to the bottom plate. A sliding sleeve is bolted to the outside of the column. One side of the sliding sleeve is connected to a guide sleeve through a connecting rod. The top end of the column is fixedly connected to a top plate. Two fixed pulleys are rotatably connected to both ends of the top plate. The probe at the lower end of the sounding rod contacts the ground. The upper part of the sounding rod passes through the guide sleeve and is connected to the guide rod through a connecting sleeve. A gravity hammer is slidably connected to the guide rod. A grabbing groove matching with the grabber is provided on the gravity hammer. A clamping step is provided at the upper end of the grabbing groove. The top end of the guide rod is fixedly connected to a guide rope seat. The grabber is slidably connected to the outer wall of the guide rod. Two guide holes are provided on the guide rope seat; The guide rod includes a thick guide rod and a thin guide rod connected to the upper end of the thick guide rod; The grabber includes inner balls, outer balls, an inner shell and an outer shell. Two lifting lugs are fixedly connected to the upper end of the inner shell. The upper part of the outside of the inner shell is thin and the lower part is thick. The upper part of the inside of the outer shell is thin and the lower part is thick. The outer diameter of the lower end of the inner shell is larger than the inner diameter of the upper end of the outer shell. The outer shell is axially limited and slides on the outside of the inner shell. An inner accommodating groove and an outer accommodating groove are respectively provided on the inner shell and the outer shell. The inner balls and the outer balls are respectively embedded in the inner accommodating groove and the outer accommodating groove and can move left and right in the inner accommodating groove and the outer accommodating groove but will not fall out; The head end of the towing rope is wound around the winch shaft. The tail end of the towing rope passes through the two fixed pulleys and then is divided into two thin ropes that pass through the guide holes on the guide rope seat and are fixedly connected to the lifting lugs on the inner shell.

2. The disassembled automatic drop hammer dynamic penetration testing device according to claim 1, wherein: The column is formed by inserting a group of short rods and splicing them together with bolts.

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