Piling recorder based on laser ranging sensor

Abstract

The invention relates to the technical field of land diesel hammer precast pile construction measurement and recording, in particular to a piling recorder based on a laser distance measuring sensor, comprising a piling hammer, the piling hammer comprises a hammer body and a pile pad, the hammer body is arranged right above the pile pad and used for hammering the pile pad in a reciprocating manner, the pile pad is fixedly mounted at the top end of a precast pile, and a laser distance measuring sensor is arranged in the pile pad. A reflecting plate B and a reflecting plate A are fixedly installed on the hammer body and the pile pad respectively, and the measuring assembly is fixed to the ground through the fixing assembly. A processor is arranged in the mobile data display equipment and used for processing data measured by the laser distance measuring sensor A and the laser distance measuring sensor B, feeding back processing results in real time and judging whether the depth of the precast pile penetrating into the soil layer under each vibration hammer is smaller than 30 mm or not. Manual recording errors are reduced, precast pile damage caused by subjective factors of operators is avoided, and the construction cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of measurement and recording of land diesel hammer precast pile construction, and in particular to a pile driving recorder based on a laser ranging sensor. Background Art

[0002] PHC prefabricated pile foundation is a common form of onshore wind power foundation. It has the advantages of strong bearing capacity, high construction efficiency, energy saving and environmental protection, and is widely applicable to various environments. However, in the process of using diesel pile hammer to penetrate the prefabricated pile into the soil layer, the difficulty of hammering is different due to the influence of the stratum. The current "Technical Specifications for Building Pile Foundations" JGJ-94-2008 stipulates the stop hammer standard: when the pile end is located in the general soil layer, the pile end design elevation should be controlled as the main, and the penetration should be supplemented; when the pile end reaches hard, hard plastic clay, medium-density or above silt, sandy gravel soil and weathered rock, the penetration should be controlled as the main, and the end elevation should be supplemented; when the penetration has reached the design requirements but the pile end elevation has not reached, it should continue to hammer for 3 groups, and the penetration of each group of 10 hits should not be greater than the value specified in the design. If necessary, the construction control penetration should be determined by test. Under normal circumstances, the penetration index determined by the standard requirements should not be less than 30mm per group (10 hits). Doing so not only protects the pile body, but also extends the service life of the pile hammer.

[0003] For safety reasons, construction workers should stay more than 5 meters away from the pile hammer. Currently, construction workers use a level to emit a laser to the precast pile body to observe the depth of the precast pile penetrating into the soil layer and give feedback to the operator of the diesel pile hammer. The on-site quality inspector records the number of hits of the diesel hammer at a distance of 1 meter from the pile. In actual operation, the observation feedback is subjective and untimely, and the pile head may be broken due to the operator's factors, resulting in economic losses. Summary of the invention

[0004] The purpose of the present invention is to provide a pile driving recorder based on a laser ranging sensor to solve the technical problems existing in the above-mentioned background technology.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A pile driving recorder based on a laser ranging sensor comprises: a pile hammer, a reflector B, a reflector A, a measuring assembly, a fixing assembly, a precast pile and a mobile data display device, wherein the pile hammer comprises: a hammer body and a pile pad, wherein the hammer body is arranged directly above the pile pad for reciprocatingly hammering the pile pad, wherein the pile pad is fixedly installed on the top of the precast pile, and the precast pile is arranged vertically to the soil layer; the reflector B and the reflector A are fixedly installed on the hammer body and the pile pad, respectively, and the measuring assembly is fixed to the ground through the fixing assembly; the measuring assembly comprises: a measuring box, a laser ranging sensor A and a laser ranging sensor Sensor B, the laser ranging sensor A and the laser ranging sensor B are both arranged at the top of the measuring box, the laser emitting ends of the laser ranging sensor A and the laser ranging sensor B are respectively facing the reflector A and the reflector B, the data measured by the laser ranging sensor A and the laser ranging sensor B are transmitted to the mobile data display device, the mobile data display device is provided with a processor, the processor processes the data measured by the laser ranging sensor A and the laser ranging sensor B and feeds back the processing results in real time, and judges whether the penetration depth of the precast pile into the soil layer is less than 30mm under each vibration hammer.

[0007] Furthermore, the reflector B comprises: a steel bar truss and a tinplate, wherein the tinplate is fixedly connected to the outer end of the steel bar truss, and the inner end of the steel bar truss is fixedly connected to the top of the hammer body; the reflector A comprises: a steel bar truss and a tinplate, wherein the tinplate is fixedly connected to the outer end of the steel bar truss, and the inner end of the steel bar truss is fixedly connected to the bottom end of the pile pad.

[0008] Furthermore, the areas of the tinplate 1 and tinplate 2 are both 80mm×80mm; the outer edge of the tinplate 2 is 800mm away from the center of the precast pile; and the outer edge of the tinplate 1 is 1000mm away from the center of the precast pile.

[0009] Furthermore, the measuring component also includes: a Bluetooth module, which is arranged inside the measuring box, and the data measured by the laser ranging sensor A and the laser ranging sensor B are transmitted to the mobile data display device through the Bluetooth module.

[0010] Furthermore, the processing results fed back in real time by the processor include: the current number of hammering times, the depth of the precast piles penetrated into the soil layer each time the hammering is performed, and the depth of the precast piles penetrated into the soil layer each time the hammering is performed.

[0011] Furthermore, the mobile data display device is a mobile phone or a laptop computer.

[0012] Furthermore, the fixed assembly includes: a support, a welded steel pipe, a floor spring shock absorber, a telescopic slide rail and an arc steel plate, the measuring box is fixedly installed in the middle of the top of the support, the middle of the four ends of the support are fixedly connected with support ear plates, the middle of the front and rear support ear plates are respectively vertically penetrated and fixedly connected with two welded steel pipes, the two welded steel pipes are respectively inserted into the soil layer, the bottom ends of the left and right support ear plates are respectively supported on the ground by two floor spring shock absorbers, two telescopic slide rails are symmetrically arranged on the support, the left telescopic ends of the two telescopic slide rails are respectively fixedly connected to the left and right sides of the outer wall of the arc steel plate, the inner wall diameter of the arc steel plate is the same as the diameter of the precast pile, and the inner wall of the arc steel plate is tightly fitted with the outer wall of the precast pile.

[0013] Furthermore, the fixing assembly also includes: a rubber shock-absorbing pad, which is arranged between the measuring box and the support.

[0014] Furthermore, the telescopic slide rail includes: a track and a slide rod, an installation cavity is opened inside the support, the track is embedded and installed in the installation cavity, the slide rod is slidably connected to the track along the length direction of the track, and the rear end of the slide rod is fixedly connected to the outer wall of the arc steel plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention uses laser distance measuring sensors A and B to respectively measure the reflection distances of the bottom of the pile pad and the top of the hammer body, and uses a Bluetooth module to transmit the data to an external mobile data display device such as a mobile phone and a laptop computer. The processor processes the data and provides real-time feedback to obtain the current number of hammer strikes, the depth of the precast pile penetrating into the soil layer each time the hammer strikes, and the depth of the precast pile penetrating into the soil layer after 10 hammer strikes (one vibration). It is judged whether the penetration depth of the precast pile into the soil layer is less than 30 mm under each vibration (10 hammer strikes). It can accurately and quickly judge whether the standard for stopping the hammer is reached, reduce the error of manual recording, avoid the damage of the precast pile caused by subjective factors of operators, and reduce the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a partial enlarged view of the present invention;

[0019] Figure 3 is a schematic diagram of the arrangement of the reflector in the present invention;

[0020] Figure 4 It is a schematic diagram of the arrangement of the arc steel plate and the telescopic slide rail in the present invention;

[0021] Figure 5 It is a flow chart of the processor processing data in the present invention.

[0022] The numbers in the accompanying drawings are: 1-hammer, 2-reflection plate B, 3-pile pad, 4-reflection plate A, 5-laser ranging sensor A, 6-laser ranging sensor B, 7-rubber shock-absorbing pad, 8-welded steel pipe, 9-floor spring shock absorber, 10-telescopic slide rail, 11-arc steel plate, 12-prefabricated pile. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figures 1 to 5 As shown, a pile driving recorder based on a laser ranging sensor includes: a pile hammer, a reflector B2, a reflector A4, a measuring component, a fixing component, a precast pile 12 and a mobile data display device, wherein the pile hammer includes: a hammer body 1 and a pile pad 3, wherein the hammer body 1 is arranged directly above the pile pad 3 for reciprocatingly hammering the pile pad 3, and the pile pad 3 is fixedly installed on the top of the precast pile 12, and the precast pile 12 is vertically arranged with the soil layer; the reflector B2 and the reflector A4 are fixedly installed on the hammer body 1 and the pile pad 3, respectively, and the measuring component is fixed to the ground through the fixing component; the measuring component includes: a measuring box, a laser ranging sensor A5 and a laser measuring The distance sensor B6, the laser distance sensor A5 and the laser distance sensor B6 are all arranged on the top of the measuring box. The laser emitting ends of the laser distance sensor A5 and the laser distance sensor B6 are facing the reflector A4 and the reflector B2 respectively. The data measured by the laser distance sensor A5 and the laser distance sensor B6 are transmitted to the mobile data display device. The mobile data display device is provided with a processor. The processor processes the data measured by the laser distance sensor A5 and the laser distance sensor B6 and feeds back the processing results in real time to determine whether the penetration depth of the precast pile 12 into the soil layer is less than 30 mm under each vibration hammer.

[0025] Laser ranging sensors A and B record the real-time distance between the bottom of the pile pad and the reflector plate on the top of the hammer and the sensor. The reflection distance of laser ranging sensor A at the i+1 moment is recorded as LAi+1, and the reflection distance at the i moment is recorded as LAi. The reflection distance of laser ranging sensor B at the i+1 moment is recorded as LBi+1, and the reflection distance at the i moment is recorded as LBi. From the i-th moment to the i+1 moment, since the height of the pile hammer and the pile pad change at the same time, the height of the pile hammer changes as HBi=LBi-LBi+1-(LAi-LAi+1). Programming is used to process data at different moments in real time to obtain the final number of hammer blows, the depth of the precast pile penetrating into the soil layer for each hammer blow, and the depth of the precast pile penetrating into the soil layer after 10 hammer blows (one vibration). It is determined whether the depth of the precast pile penetrating into the soil layer under each vibration (10 times) of hammer blows is less than 30mm. Figure 5 .

[0026] In this embodiment, the reflector B2 includes: a steel bar truss 1 and a tinplate 1, the tinplate 1 is fixedly connected to the outer end of the steel bar truss 1, and the inner end of the steel bar truss 1 is fixedly connected to the top of the hammer body 1, and the reflector A4 includes: a steel bar truss 2 and a tinplate 2, the tinplate 2 is fixedly connected to the outer end of the steel bar truss 2, and the inner end of the steel bar truss 2 is fixedly connected to the bottom end of the pile pad 3; the area of ​​the tinplate 1 and the tinplate 2 are both 80mm×80mm; the outer edge of the tinplate 2 is 800mm away from the center of the precast pile 12; the outer edge of the tinplate 1 is 1000mm away from the center of the precast pile 12; the tinplate 1 and the tinplate 2 can reflect the laser emitted by the laser ranging sensor A5 and the laser ranging sensor B6.

[0027] In this embodiment, the measuring component further includes: a Bluetooth module, which is arranged inside the measuring box, and the data measured by the laser ranging sensor A5 and the laser ranging sensor B6 are transmitted to the mobile data display device through the Bluetooth module.

[0028] In this embodiment, the processing results fed back by the processor in real time include: the current number of hammering times, the depth of the precast pile 12 penetrating into the soil layer after each hammering, and the depth of the precast pile 12 penetrating into the soil layer after 10 hammerings; and then judging whether the penetration depth of the precast pile 12 into the soil layer is less than 30 mm under each vibration hammering; it can accurately and quickly judge whether the standard for stopping hammering is met, reduce the error of manual recording, avoid the damage of precast piles caused by subjective factors of operators, and reduce construction costs.

[0029] In this embodiment, the mobile data display device is a mobile phone or a laptop computer, and the processor is a processor built into the mobile phone or the laptop computer.

[0030] In this embodiment, the fixing assembly includes: a support, a welded steel pipe 8, a floor spring shock absorber 9, a telescopic slide rail 10 and an arc steel plate 11. The measuring box is fixedly installed in the middle of the top of the support. The middle of the front, rear, left and right ends of the support are fixedly connected with support ear plates. Two welded steel pipes 8 are vertically penetrated and fixedly connected in the middle of the front and rear support ear plates respectively. The two welded steel pipes 8 are inserted into the soil layer respectively. The bottom ends of the left and right support ear plates are supported on the ground by two floor spring shock absorbers 9 respectively. Two telescopic slide rails 10 are symmetrically arranged on the support. The left telescopic ends of the two telescopic slide rails are fixedly connected to the left and right sides of the outer wall of the arc steel plate 11 respectively. The diameter of the inner wall of the arc steel plate 11 is the same as the diameter of the precast pile 12, and the inner wall of the arc steel plate 11 is tightly fitted with the outer wall of the precast pile 12; the fixing assembly also includes: a rubber shock-absorbing pad 7, which is arranged between the measuring box and the support; the floor spring shock absorber 9 and the rubber shock-absorbing pad 7 are used to reduce the influence of pile driving vibration on the measuring instrument.

[0031] In this embodiment, the telescopic slide rail 10 includes: a track and a slide rod. An installation cavity is opened inside the support, and the track is embedded and installed in the installation cavity. The slide rod is slidably connected to the track along the length direction of the track, and the rear end of the slide rod is fixedly connected to the outer wall of the arc steel plate 11; the arc steel plate 11 is placed against the front side of the precast pile 12 to accurately locate the position of the fixed component. The laser ranging sensor A5 and the laser ranging sensor B6 quickly correspond to the reflective plates at the bottom of the pile pad and the top of the pile hammer. Before piling begins, the arc steel plate 11 leaves the precast pile 12 through the telescopic slide rail 10 to reduce the impact of the pile driving vibration on the sensor.

[0032] Workflow:

[0033] 1. Fix reflective plate A and reflective plate B at the bottom of the pile pad and the top of the hammer body of the pile hammer respectively. The outer edges of reflective plate A and reflective plate B are 800mm and 1000mm away from the center point of the prefabricated pile respectively. The size of tinplate 1 and tinplate 2 as reflective plates are both 80mm×80mm;

[0034] 2. Use the hoisting equipment to place the precast pile upright at the piling position, with the arc steel plate close to the front of the precast pile. The telescopic rail extends to a point 1000mm from the center of the precast pile. The measuring component is accurately positioned. The laser distance sensor A and the laser distance sensor B can accurately position the reflector A and reflector B.

[0035] 3. Start the laser distance sensor A and laser distance sensor B at the same time, turn on the mobile data display device, start real-time measurement and display data. When it is displayed that the depth of the precast pile penetrating into the soil layer is less than 30mm after 10 hammer strikes, you should start to control the throttle of the pile hammer, hit it hard and low, and pay attention to the quality of the pile body;

[0036] 4. After the precast pile construction is completed, pull the instrument out of the soil layer and quickly position it again after the next precast pile is positioned.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "top / bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, according to the technical essence of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A pile driving recorder based on a laser ranging sensor, characterized in that: include: A pile hammer, a reflector B (2), a reflector A (4), a measuring component, a fixing component, a precast pile (12) and a mobile data display device. The pile hammer comprises: a hammer body (1) and a pile pad (3). The hammer body (1) is arranged directly above the pile pad (3) for reciprocatingly hammering the pile pad (3). The pile pad (3) is fixedly installed on the top of the precast pile (12). The precast pile (12) is arranged vertically to the soil layer. The hammer body (1) and the pile pad (3) are respectively fixedly installed with a reflector B (2) and a reflector A (4). The measuring component is fixed to the ground via a fixing component. The measuring component comprises: a measuring box, a laser distance measuring sensor A (5) and a laser distance measuring sensor B ( 6), the laser distance measuring sensor A (5) and the laser distance measuring sensor B (6) are both arranged at the top of the measuring box, the laser emitting ends of the laser distance measuring sensor A (5) and the laser distance measuring sensor B (6) are respectively facing the reflecting plate A (4) and the reflecting plate B (2), the data measured by the laser distance measuring sensor A (5) and the laser distance measuring sensor B (6) are transmitted to the mobile data display device, the mobile data display device is provided with a processor, the processor processes the data measured by the laser distance measuring sensor A (5) and the laser distance measuring sensor B (6) and feeds back the processing result in real time, and judges whether the penetration depth of the precast pile (12) into the soil layer is less than 30 mm under each vibration hammer.

2. A pile driving recorder based on a laser ranging sensor according to claim 1, characterized in that: The reflecting plate B (2) comprises: a steel bar truss and a tinplate, wherein the tinplate is fixedly connected to the outer end of the steel bar truss, and the inner end of the steel bar truss is fixedly connected to the top end of the hammer body (1). The reflecting plate A (4) comprises: a steel bar truss and a tinplate, wherein the tinplate is fixedly connected to the outer end of the steel bar truss, and the inner end of the steel bar truss is fixedly connected to the bottom end of the pile pad (3).

3. A pile driving recorder based on a laser ranging sensor according to claim 2, characterized in that: The areas of the tinplate 1 and tinplate 2 are both 80 mm×80 mm; the outer edge of the tinplate 2 is 800 mm away from the center of the prefabricated pile (12); and the outer edge of the tinplate 1 is 1000 mm away from the center of the prefabricated pile (12).

4. A pile driving recorder based on a laser ranging sensor according to claim 1, characterized in that: The measuring component further comprises: a Bluetooth module, which is arranged inside the measuring box, and the data measured by the laser distance measuring sensor A (5) and the laser distance measuring sensor B (6) are transmitted to the mobile data display device through the Bluetooth module.

5. A pile driving recorder based on a laser ranging sensor according to claim 1, characterized in that: The processing results fed back in real time by the processor include: the current number of hammer strikes, the depth of the precast pile (12) penetrated into the soil layer each time the precast pile (12) is hammered, and the depth of the precast pile (12) penetrated into the soil layer after 10 hammer strikes.

6. A pile driving recorder based on a laser ranging sensor according to claim 1, characterized in that: The mobile data display device is a mobile phone or a laptop computer.

7. A pile driving recorder based on a laser ranging sensor according to claim 1, characterized in that: The fixing assembly comprises: a support, a welded steel pipe (8), a floor spring shock absorber (9), a telescopic slide rail (10) and an arc steel plate (11); the measuring box is fixedly mounted at the middle of the top of the support; the middle of the front, rear, left and right ends of the support are all fixedly connected with support ear plates; the middle of the front and rear support ear plates are respectively vertically penetrated and fixedly connected with two welded steel pipes (8); the two welded steel pipes (8) are respectively inserted into the soil layer; the bottom ends of the left and right support ear plates are respectively supported on the ground through two floor spring shock absorbers (9); two telescopic slide rails (10) are symmetrically arranged on the support; the left telescopic ends of the two telescopic slide rails are respectively fixedly connected with the left and right sides of the outer wall of the arc steel plate (11); the inner wall diameter of the arc steel plate (11) is the same as the diameter of the precast pile (12); the inner wall of the arc steel plate (11) is tightly fitted with the outer wall of the precast pile (12).

8. A pile driving recorder based on a laser ranging sensor according to claim 7, characterized in that: The fixing assembly further comprises a rubber anti-vibration pad (7), wherein the rubber anti-vibration pad (7) is arranged between the measuring box and the support.

9. A pile driving recorder based on a laser ranging sensor according to claim 7, characterized in that: The telescopic slide rail (10) comprises: a track and a slide rod. The support is provided with an installation cavity inside, the track is embedded in the installation cavity, the slide rod is slidably connected to the track along the length direction of the track, and the rear end of the slide rod is fixedly connected to the outer wall of the arc steel plate (11).

Images