A device and method for detecting the bearing capacity of a water conservancy project foundation

Abstract

The application relates to the technical field of water conservancy engineering detection, in particular to a water conservancy engineering foundation bearing capacity detection device, which comprises a probe rod for penetrating into a soil layer and a gravity hammer for applying gravity to the probe rod. The top of the probe rod is threadedly connected with a connector, the top end of the connector is fixedly connected with a sliding rod, the sliding rod is detachably connected with a guide rod in sliding connection with the sliding rod, the gravity hammer is sleeved on the guide rod and is in sliding connection with the guide rod, the top end of the guide rod is fixedly connected with a mounting plate, and the mounting plate is fixedly connected with a driving mechanism for driving the gravity hammer to move upwards along the guide rod and then freely fall. The gravity hammer is always kept on the same axis with the probe rod through the arrangement of the guide rod, so that the gravity hammer can hammer the connector after freely falling, the connector drives the probe rod to move downwards, the position of the probe rod does not need to be adjusted for multiple times during the detection process, and the operation amount of the staff is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of water conservancy engineering detection, in particular to a water conservancy engineering foundation bearing capacity detection device and method. BACKGROUND

[0002] The foundation is a key part of water conservancy engineering construction, and in foundation construction, the foundation test detection must be strengthened, so as to clearly know the geological conditions of the water conservancy engineering construction. The standard penetration test is a kind of dynamic sounding, and is a method for measuring the bearing capacity of the foundation on site.

[0003] The existing patent with the patent authorization announcement No. CN 114892629 B discloses a water conservancy engineering foundation bearing capacity detection device and method, which comprises a mobile carrier, a controller, an operating handle and a detachable storage battery installed on the mobile carrier, a lifting mechanism, the lifting mechanism comprising a fixed plate, an electric hydraulic push rod and a movable plate, the electric hydraulic push rod being installed on the mobile carrier through the fixed plate, and the movable end of the electric hydraulic push rod being fixed with the movable plate, a multi-directional rotating mechanism installed on the movable plate, and a weight release mechanism.

[0004] In the application, the weight release mechanism is used to release the weight, the weight hammers the probe rod, and then the weight is reset through the cooperation of the lifting mechanism, the multi-directional rotating mechanism and the weight release mechanism. However, since the weight release mechanism and the probe rod are in a split structure, the probe rod will be displaced after being subjected to the force. When the weight is reset through the cooperation of the lifting mechanism, the multi-directional rotating mechanism and the weight release mechanism, the central axis of the avoiding hole and the central axis of the probe rod cannot always coincide with each other. The axial position of the weight and the probe rod is adjusted for several times to complete the measurement, which increases the operation complexity and reduces the foundation bearing capacity detection efficiency. SUMMARY

[0005] The application aims to provide a water conservancy engineering foundation bearing capacity detection device and method, which solves the problem that the weight hammer cannot be reset on the same axis as the probe rod through the arrangement of the driving mechanism and the fixing mechanism.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: a water conservancy engineering foundation bearing capacity detection device, which comprises a probe rod for penetrating into the soil layer and a weight hammer for applying gravity to the probe rod, the top of the probe rod is threadedly connected with a connector, the top end of the connector is fixedly connected with a sliding rod, the sliding rod is detachably connected with a guide rod in sliding connection with the sliding rod, the weight hammer is sleeved on the guide rod and is in sliding connection with the guide rod, the top end of the guide rod is fixedly connected with a mounting plate, the mounting plate is fixedly connected with a driving mechanism for driving the weight hammer to move upward along the guide rod and then freely fall, and the mounting plate is also fixedly connected with a fixing mechanism for fixing the positions of the probe rod and the mounting plate.

[0007] Optionally, the driving mechanism comprises a fixed frame, the fixed frame is sleeved outside the guide rod, the fixed frame is fixedly connected below the mounting plate through a side plate, at least three lead screws are rotationally connected between the fixed frame and the mounting plate, three support mechanisms for supporting the upward movement of the gravity hammer are threadedly connected on the three lead screws, the top ends of the three lead screws penetrate out and are fixedly connected with first gears which are fixedly connected with the mounting plate, a second gear is rotationally connected to the top of the mounting plate, the second gear is engaged with the three first gears, the top of the mounting plate is also fixedly connected with a fixed frame for limiting the rotational positions of the first and second gears, and a motor is fixedly connected to the top of the fixed frame for driving the rotation of the second gear to drive the simultaneous rotation of the three first gears.

[0008] Optionally, the support mechanism comprises a number of screw blocks corresponding to the number of lead screws, the screw blocks are threadedly connected with the lead screws, an installation rod is fixedly connected to one side of the three screw blocks, a supporting rod is arranged below the installation rod, a connecting shaft is fixedly connected to the end of the supporting rod, the connecting shaft is rotationally connected with the installation rod, a corner cylinder is fixedly connected to the top of the installation rod, and the output end of the corner cylinder is fixedly connected with the shaft end of the connecting shaft.

[0009] Optionally, the fixing mechanism comprises at least three supporting rods, the top ends of the three supporting rods are rotationally connected with the mounting plate, supporting legs are rotationally connected to the bottom ends of the supporting rods, positioning rods are slidingly connected to the supporting legs, the bottom ends of the positioning rods penetrate out of the supporting legs, pressing blocks are fixedly connected to the top of the positioning rods, and connecting pieces for improving the connecting strength between the supporting rods and the mounting plate are fixedly connected between the fixed frame and the supporting rods.

[0010] Optionally, the connecting piece comprises two connecting rods, one end of the two connecting rods is rotationally connected, and the other ends of the two connecting rods are rotationally connected with the fixed frame and the supporting rod respectively.

[0011] Optionally, a convex rib for limiting the movement path of the sliding rod is fixedly connected to the inner wall of the guide rod, and a sliding groove for accommodating the convex rib and slidingly connected with the convex rib is arranged on the outer wall of the sliding rod.

[0012] Optionally, a drill rod is fixedly connected to the lower part of the positioning rod, a rope is fixedly connected to the supporting leg, the end of the rope is fixedly connected with the pressing block, and anti-skid lines for improving the friction are arranged on the bottom of the supporting leg.

[0013] Optionally, a roller for reducing the friction between the supporting rod and the bottom of the gravity hammer is rotationally connected to the side of the supporting rod close to the gravity hammer, and a wear-resistant base plate is detachably connected to the bottom of the gravity hammer.

[0014] Optionally, a hammering guide plate is detachably connected to the top of the connector.

[0015] The application also provides a water conservancy engineering foundation bearing capacity detection method, which is realized based on the water conservancy engineering foundation bearing capacity detection device and comprises the following steps:

[0016] Step one: place the probe rod into the drill hole to be detected, put the gravity hammer on the guide rod, and set the guide rod on the connector through the slide rod on the top of the connector, so that the mounting plate is above the probe rod; then rotate the support rod to make the supporting feet contact with the ground, so that the positions of the probe rod and the gravity hammer are fixed;

[0017] Step two: drive the gravity hammer to move upwards along the guide rod through the driving mechanism and the supporting mechanism; when the gravity hammer moves to a predetermined height, the supporting mechanism is closed, so that the gravity hammer automatically falls to hit the connector; the driving mechanism and the supporting mechanism are repeatedly started, so that the connector drives the probe rod to penetrate into the soil layer;

[0018] Step three: take out the probe rod and detect and record the soil sample and the number of hammering in the probe rod.

[0019] Compared with the prior art, the application has the following beneficial effects: the gravity hammer is always kept on the same axis with the probe rod through the setting of the guide rod, so that the gravity hammer can hit the connector after free falling, thereby making the connector drive the probe rod to move downwards; the position of the probe rod does not need to be adjusted multiple times during the detection process, the operation amount of the workers is reduced, the detection efficiency is improved, the gravity hammer can be automatically driven to move upwards through the cooperation of the driving mechanism and the fixing mechanism, manual moving of the gravity hammer is not needed, the labor intensity is reduced, and the application is convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the whole application;

[0021] Figure 2 It is a structural schematic diagram of the whole application from another perspective;

[0022] Figure 3 It is a structural schematic diagram of the motor of the application;

[0023] Figure 4 It is a structural schematic diagram of the second gear of the application;

[0024] Figure 5 It is a structural schematic diagram of the supporting foot of the application;

[0025] Figure 6 It is a structural schematic diagram of the connector of the application;

[0026] Figure 7 It is a two-dimensional structural schematic diagram of the driving mechanism and the fixing mechanism of the application;

[0027] Figure 8 Structure diagram of fixed frame of the present application.

[0028] In the figure: 1, probe rod; 2, connector; 3, gravity hammer; 4, guide rod; 5, mounting plate; 6, corner cylinder; 7, mounting rod; 8, supporting rod; 9, fixed frame; 10, screw block; 11, screw rod; 12, first gear; 13, second gear; 14, side plate; 15, motor; 16, fixed frame; 17, supporting rod; 18, connecting rod; 19, pressing block; 20, rope; 21, supporting leg; 22, positioning rod. DETAILED DESCRIPTION

[0029] The technical solutions of the present application are further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, not all.

[0030] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] Please refer to Figures 1 to 8The embodiment of the present application provides a water conservancy project foundation bearing capacity detection device, which comprises a probe rod 1 for penetrating into a soil layer and a gravity hammer 3 for applying gravity to the probe rod 1, the top of the probe rod 1 is threadedly connected with a connector 2, the top end of the connector 2 is fixedly connected with a sliding rod, the sliding rod is detachably connected with a guide rod 4 in sliding connection with the sliding rod, the gravity hammer 3 is sleeved on the guide rod 4 and is in sliding connection with the guide rod 4, the top end of the guide rod 4 is fixedly connected with a mounting plate 5, the mounting plate 5 is fixedly connected with a driving mechanism for driving the gravity hammer 3 to move upwards along the guide rod 4 and then freely fall, and the mounting plate 5 is also fixedly connected with a fixing mechanism for fixing the positions of the probe rod 1 and the mounting plate 5.

[0033] Specifically, the gravity hammer 3 is always kept on the same axis with the probe rod 1 through the arrangement of the guide rod 4, so that the gravity hammer 3 can hammer the connector 2 after freely falling, thereby driving the probe rod 1 to move downwards, the position of the probe rod 1 does not need to be adjusted multiple times during detection, the operation amount of the staff is reduced, the detection efficiency is improved, and the gravity hammer 3 can be automatically driven to move upwards through the cooperation of the driving mechanism and the fixing mechanism, manual moving of the gravity hammer 3 is not needed, the labor intensity is reduced, and use is facilitated.

[0034] Further, referring to Figures 3 to 4 The driving mechanism comprises a fixed frame 9, the fixed frame 9 is sleeved on the outer side of the guide rod 4, the fixed frame 9 is fixedly connected below the mounting plate 5 through a side plate 14, at least three lead screws 11 are rotatably connected between the fixed frame 9 and the mounting plate 5, the three lead screws 11 are threadedly connected with a supporting mechanism for supporting the gravity hammer 3 to move upwards, the top ends of the three lead screws 11 penetrate out of the first gear 12 fixedly connected with the mounting plate 5, the top of the mounting plate 5 is rotatably connected with a second gear 13, the second gear 13 is in meshing connection with the three first gears 12, and the top of the mounting plate 5 is also fixedly connected with a fixing frame 16 for limiting the rotating positions of the first gear 12 and the second gear 13, and the top of the fixing frame 16 is fixedly connected with a motor 15 for driving the second gear 13 to rotate so as to drive the three first gears 12 to rotate simultaneously.

[0035] Specifically, when the driving motor 15 is started, the second gear 13 connected with the output end of the motor 15 rotates, at this time, the three first gears 12 rotate simultaneously to drive the three lead screws 11 to rotate simultaneously, and the supporting mechanism threadedly connected with the lead screws 11 moves upwards through the rotating lead screws 11, since the supporting mechanism is used for supporting the gravity hammer 3, when the supporting mechanism moves upwards, the gravity hammer 3 is moved upwards to a predetermined height, and the gravity hammer 3 freely falls from the predetermined height along the guide rod 4.

[0036] Further, referring to Figures 3 to 4The supporting mechanism comprises screw blocks 10 corresponding to the number of the lead screws 11, the screw blocks 10 are threadedly connected with the lead screws 11, the three screw blocks 10 are fixedly connected with mounting rods 7 on the side close to each other, the lower part of the mounting rods 7 is provided with supporting rods 8, the end part of the supporting rods 8 is fixedly connected with connecting shafts, the connecting shafts are rotatably connected with the mounting rods 7, the top part of the mounting rods 7 is fixedly connected with corner cylinders 6, and the output end of the corner cylinders 6 is fixedly connected with the shaft end of the connecting shafts.

[0037] Specifically, during the up-down movement of the screw blocks 10, the mounting rods 7 move up and down, when the gravity hammer 3 needs to be moved up, the corner cylinders 6 on the mounting rods 7 drive the supporting rods 8 to be close to the bottom of the gravity hammer 3, the supporting rods 8 are close to each other to support the gravity hammer 3, at this time, the motor 15 is started, the supporting rods 8 are in contact with the bottom of the gravity hammer 3 to drive the gravity hammer 3 to move up when the mounting rods 7 are driven to move up by the lead screws 11, when the gravity hammer 3 is moved to a predetermined height, the corner cylinders 6 drive the supporting rods 8 to rotate, so that the supporting rods 8 are away from the gravity hammer 3, at this time, the gravity hammer 3 freely falls.

[0038] Further, please refer to Figure 1 and Figure 5 The fixing mechanism comprises at least three supporting rods 17, the top end of the three supporting rods 17 is rotatably connected with the mounting plate 5, the bottom end of the supporting rod 17 is rotatably connected with a supporting leg 21, the supporting leg 21 is slidably connected with a positioning rod 22, the bottom end of the positioning rod 22 penetrates out of the supporting leg 21, the top part of the positioning rod 22 is fixedly connected with a pressing block 19, and the fixing frame 9 and the supporting rod 17 are fixedly connected with a connecting piece which improves the connecting strength between the supporting rod 17 and the mounting plate 5.

[0039] Specifically, through the setting of the fixing mechanism, the position of the mounting plate 5 and the probe rod 1 can be fixed, the problem of poor detection effect caused by the position movement of the probe rod 1 in the detection process is reduced, after the detection is completed, the supporting rod 17 can be contacted with the mounting plate 5 in a rotating mode to reduce the occupied space of the fixing mechanism, facilitate carrying, the supporting leg 21 at the bottom of the supporting rod 17 enables the positioning rod 22 to be contacted with the soil layer by stepping down the positioning rod 22 when the position of the supporting rod 17 needs to be fixed, so that the position of the supporting rod 17 is fixed.

[0040] Further, please refer to Figure 1 and Figure 5 The connecting piece comprises two connecting rods 18, the two connecting rods 18 are rotatably connected at the side close to each other, the two connecting rods 18 are rotatably connected with the fixing frame 9 and the supporting rod 17 at the side far away from each other, the structural strength of the supporting rod 17 is improved, and the problem of large amplitude movement of the supporting rod 17 is avoided.

[0041] Further, please refer to Figure 6The convex rib is fixedly connected to the inner wall of the guide rod 4 and limits the moving path of the slide rod, and the slide groove is arranged on the outer wall of the slide rod and accommodates the convex rib and is in sliding connection with the convex rib, so that the probe rod 1 is prevented from rotating under the gravity hammer 3 during the downward movement, and the stability during the detection process is improved.

[0042] Further, in order to improve the fixing effect of the supporting rod 17, the lower part of the positioning rod 22 is fixedly connected with a drill rod, the supporting leg 21 is fixedly connected with a rope 20, the end of the rope 20 is fixedly connected with the pressing block 19, and the bottom of the supporting leg 21 is provided with anti-skid lines for improving the friction.

[0043] Further, in order to improve the service life of the supporting rod 8, the side close to the gravity hammer 3 of the supporting rod 8 is rotatably connected with a roller for reducing the friction between the supporting rod 8 and the bottom of the gravity hammer 3, so that the abrasion of the gravity hammer 3 on the supporting rod 8 is reduced, and the bottom of the gravity hammer 3 is detachably connected with a wear-resistant pad plate, so that the abrasion of the gravity hammer 3 on the body is reduced.

[0044] Further, the top of the connector 2 is detachably connected with a hammering guide plate, so that the maintenance of the staff is facilitated.

[0045] The working principle of the present application is as follows: the probe rod 1 is placed in the drill hole to be detected, the gravity hammer 3 is sleeved on the guide rod 4, the guide rod 4 is sleeved on the connector 2 through the slide rod at the top of the connector 2, the mounting plate 5 is above the probe rod 1, the supporting leg 21 is in contact with the ground by rotating the supporting rod 17, and the positions of the probe rod 1 and the gravity hammer 3 are fixed; the gravity hammer 3 is driven to move upward along the guide rod 4 by the driving mechanism and the supporting mechanism, when the gravity hammer 3 moves to the predetermined height, the supporting mechanism is closed, the gravity hammer 3 automatically falls to hammer the connector 2, the driving mechanism and the supporting mechanism are repeatedly started, the connector 2 pushes the probe rod 1 to penetrate into the soil layer, and the probe rod 1 is taken out to detect and record the soil sample in the probe rod 1 and the number of hammering.

[0046] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementation modes are not enumerated. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A bearing capacity testing device for a hydraulic engineering foundation, comprising a probe (1) for penetrating the soil layer and a gravity hammer (3) for applying gravity to the probe (1), wherein the top of the probe (1) is threadedly connected to a connector (2), characterized in that: The connector (2) is fixedly connected to a slide rod at its top end. A guide rod (4) is detachably connected to the slide rod and slidably connected to it. The gravity hammer (3) is sleeved on the guide rod (4) and slidably connected to it. A mounting plate (5) is fixedly connected to the top end of the guide rod (4). A drive mechanism that drives the gravity hammer (3) to move up along the guide rod (4) and then fall freely is fixedly connected to the mounting plate (5). A fixing mechanism that fixes the position of the probe rod (1) and the mounting plate (5) is also fixedly connected to the mounting plate (5). The driving mechanism includes a fixed frame (9), which is sleeved on the outside of the guide rod (4). The fixed frame (9) is fixedly connected to the bottom of the mounting plate (5) through a side plate (14). At least three lead screws (11) are rotatably connected between the fixed frame (9) and the mounting plate (5). A support mechanism for supporting the upward movement of the gravity hammer (3) is threaded onto the lead screws (11). The top of the lead screws (11) is through which a first gear (12) is fixedly connected to the mounting plate (5). A second gear (13) is rotatably connected to the top of the mounting plate (5). The second gear (13) meshes with the first gear (12). A fixed frame (16) is also fixedly connected to the top of the mounting plate (5) to restrict the rotation position of the first gear (12) and the second gear (13). A motor (15) is fixedly connected to the top of the fixed frame (16) to drive the second gear (13) to rotate so as to drive the first gear (12) to rotate simultaneously. The fixing mechanism includes at least three support rods (17). The top of the support rod (17) is rotatably connected to the mounting plate (5). The bottom of the support rod (17) is rotatably connected to a foot (21). A positioning rod (22) is slidably connected to the foot (21). The bottom of the positioning rod (22) extends through the foot (21). A pressure block (19) is fixedly connected to the top of the positioning rod (22). A connector that improves the connection strength between the support rod (17) and the mounting plate (5) is fixedly connected between the fixing frame (9) and the support rod (17). The supporting mechanism includes screw blocks (10) corresponding to the number of lead screws (11). The screw blocks (10) are threadedly connected to the lead screws (11). An installation rod (7) is fixedly connected to one side of the screw blocks (10). A support rod (8) is provided below the installation rod (7). A connecting shaft is fixedly connected to the end of the support rod (8). The connecting shaft is rotatably connected to the installation rod (7). A rotary cylinder (6) is fixedly connected to the top of the installation rod (7). The output end of the rotary cylinder (6) is fixedly connected to the shaft end of the connecting shaft.

2. The bearing capacity testing device for water conservancy engineering foundations according to claim 1, characterized in that: The connector includes two connecting rods (18), with the two connecting rods (18) rotatably connected at their close ends and the two connecting rods (18) rotatably connected to the fixed frame (9) and the support rod (17) respectively at their far ends.

3. The bearing capacity testing device for water conservancy engineering foundations according to claim 1, characterized in that: The inner wall of the guide rod (4) is fixedly connected with a protruding rib that restricts the movement path of the slide rod, and the outer wall of the slide rod is provided with a groove that accommodates the protruding rib and slides in connection with the protruding rib.

4. The bearing capacity testing device for water conservancy engineering foundations according to claim 1, characterized in that: The lower part of the positioning rod (22) is fixedly connected to a drill rod, and the support leg (21) is fixedly connected to a rope (20). The end of the rope (20) is fixedly connected to the pressure block (19), and the bottom of the support leg (21) is provided with anti-slip texture to improve friction.

5. The bearing capacity testing device for water conservancy engineering foundations according to claim 1, characterized in that: The support rod (8) is rotatably connected to a roller on the side near the gravity hammer (3) to reduce the friction between the support rod (8) and the bottom of the gravity hammer (3), and the bottom of the gravity hammer (3) is detachably connected to a wear-resistant pad.

6. The bearing capacity testing device for water conservancy engineering foundations according to claim 1, characterized in that: The top of the connector (2) is detachably connected to a hammer guide plate.

7. A method for testing the bearing capacity of a water conservancy project foundation, implemented based on the water conservancy project foundation bearing capacity testing device as described in any one of claims 1 to 6, characterized in that, Includes the following steps: Step 1: Place the probe (1) into the borehole to be tested, put the gravity hammer (3) on the guide rod (4), and use the sliding rod at the top of the connector (2) to put the guide rod (4) on the connector (2) so that the mounting plate (5) is above the probe (1). Then, by rotating the support rod (17), the support foot (21) is brought into contact with the ground to complete the fixation of the position of the probe (1) and the gravity hammer (3). Step 2: Drive the gravity hammer (3) to move upward along the guide rod (4) through the drive mechanism and the support mechanism. When the gravity hammer (3) moves to the predetermined height, the support mechanism closes, so that the gravity hammer (3) automatically falls and hammers the connector (2). Repeat the start of the drive mechanism and the support mechanism, so that the connector (2) pushes the probe (1) into the soil layer. Step 3: Remove the probe (1) and record the number of hammer blows and the soil sample inside the probe (1).

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