A method for detecting the verticality of a precast pile

Abstract

The present application relates to a kind of precast pile construction perpendicularity detection method, comprising the following steps:1) precast pile piling mechanism installation;2) sensor installation;3) support perpendicularity adjustment;4) precast pile fixation;5) precast pile piling, precast pile perpendicularity detection, the precast pile construction perpendicularity detection method, using dual-axis tilt sensor real-time detection precast pile construction process X, Y two vertical direction's longitudinal perpendicularity is monitored, promptly master whether pile body perpendicularity meets the requirement, can improve construction efficiency and construction quality, and need not manual observation operation, detection data is accurate.

Description

Technical Field

[0001] This invention relates to testing equipment, and more particularly to a method for testing the verticality of precast piles. Background Technology

[0002] Precast piles are a common type of deep foundation pile, and their pile types and construction technologies are relatively mature. In recent years, many new precast pile types have been developed and innovated, such as irregularly shaped precast piles (bamboo-joint piles, screw-locked prestressed concrete square piles), and reinforced composite piles. Precast piles have the advantages of high construction efficiency, intuitive and reliable construction results, and less environmental pollution during construction. Currently, with the continuous innovation, development, and improvement of precast pile construction technology and pile types, their application is becoming increasingly widespread, and their proportion in pile foundation construction projects is increasing daily.

[0003] With the widespread application of precast piles, higher requirements have been placed on the quality of pile foundation construction. Among them, pile verticality is an important technical indicator that is directly related to the quality of pile foundation construction. If the verticality and inclination of the pile body do not meet the requirements during construction, it is easy to cause quality accidents such as inclined piles, pile damage, and displacement. The construction results will greatly reduce the bearing capacity and stability of the pile, making it difficult to meet the design requirements.

[0004] Currently, the verticality monitoring of piles is mainly accomplished by using two theodolites to observe the vertical angle of the pile body in the vertical direction. The advantage of this method is that it is highly operable, but the efficiency is relatively low, the instrument setup is troublesome, it is easily affected by external factors, and it requires dedicated construction personnel for measurement. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a method for detecting the verticality of precast pile construction, so as to solve one or more problems in the prior art.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A method for detecting the verticality of precast piles includes the following steps:

[0008] 1) Installation of precast pile driving mechanism: The precast pile driving machine arrives at the construction site, and the base of the precast pile driving machine is supported on the ground by adjustable support feet. A bracket perpendicular to the base is connected to the base. The bracket is connected to several guide rods, which are also perpendicular to the base. A precast pile fixing mechanism for fixing the precast pile is passed through the guide rods. The bracket is connected to a drive mechanism that drives the precast pile fixing mechanism to move.

[0009] 2) Sensor installation: Connect the dual-axis tilt sensor to one side of the bracket, and connect the dual-axis tilt sensor to the control terminal via a cable;

[0010] 3) Verticality adjustment of the bracket: The dual-axis tilt sensor can detect the verticality of the bracket and transmit the verticality data to the control terminal. The control terminal can adjust the adjustable support feet to make the base horizontal based on the verticality data of the bracket, so that the bracket is perpendicular to the horizontal plane.

[0011] 4) Precast pile fixing: The precast piles are fixedly connected by a precast pile fixing mechanism, ensuring that the precast piles are also perpendicular to the base.

[0012] 5) Precast pile driving and precast pile verticality detection: The driving mechanism drives the precast pile fixing mechanism and the fixed precast pile together to drive the precast pile into the ground. During the precast pile driving process, the verticality of the support can be detected in real time by a dual-axis tilt sensor. Since the support, guide rod and precast pile are all perpendicular to the base, the verticality of the support detected by the dual-axis tilt sensor is the verticality of the precast pile. The dual-axis tilt sensor transmits the verticality data of the support to the control terminal in real time. The control terminal can adjust the level of the base in real time through the adjustable support feet, thereby adjusting the verticality of the support. Similarly, the verticality of the precast pile can be adjusted to ensure that the verticality of the precast pile meets the design requirements.

[0013] As a further improvement to the above technical solution:

[0014] The precast pile driving mechanism is an impact-type precast pile driving mechanism. The precast pile fixing mechanism of the impact-type precast pile driving mechanism is an impact fixing clamp. The impact fixing clamp is threaded onto the guide rod connected to the bracket. The driving mechanism is an impact hammer set on the impact fixing clamp. The impact hammer is raised and lowered on the bracket.

[0015] The impact fixing clamp is connected to the hammer guide rod, and the impact hammer passes through the hammer guide rod and can move up and down on the hammer guide rod.

[0016] The precast pile driving mechanism is a hydraulic precast pile driving mechanism. Two supports are provided on the base of the hydraulic precast pile driving mechanism. The driving mechanism is a hydraulic cylinder connected to the supports. The precast pile fixing mechanism is a pile clamp connected to the lower side of the driving end of the hydraulic cylinder. The pile clamp holds and fixes the precast pile. The pile clamp passes through the guide rod between the supports and the base.

[0017] Step 4) After the precast pile is fixedly connected to the precast pile by the precast pile fixing mechanism, a dual-axis tilt sensor can be detachably connected to one side of the precast pile to directly detect the verticality of the precast pile. By comparing the verticality of the precast pile and the support, it can be detected whether the precast pile is perpendicular to the base, preventing tilting deviation when the precast pile fixing mechanism fixes the precast pile. After the verticality of the precast pile and the support is aligned, the dual-axis tilt sensor is removed from the precast pile before proceeding to step 5).

[0018] Step 5) After the pile driving is completed, the dual-axis tilt sensor can be detachably connected to one side of the precast pile again. The verticality of the precast pile can be directly detected again through the dual-axis tilt sensor to perform the final verification of the verticality of the precast pile. After the verification is completed, the dual-axis tilt sensor can be detached from one side of the precast pile again.

[0019] The dual-axis tilt sensor includes a connecting base with a connecting hole, and the dual-axis tilt sensor is detachably connected to the precast pile via a clamp.

[0020] The supporting feet are hydraulic support feet.

[0021] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0022] 1) This method for detecting the verticality of precast piles uses a dual-axis tilt sensor. Since the precast pile, guide rod, and support can all maintain a vertical base, the verticality of the support can be detected by the dual-axis tilt sensor, thereby detecting the verticality of the precast pile. It can also monitor the longitudinal verticality in the X and Y directions in real time during the construction of the precast pile, so as to promptly determine whether the verticality of the pile meets the requirements, which can improve construction efficiency and quality. Moreover, no manual observation or operation is required, and the detection data is accurate.

[0023] 2) The method for detecting the verticality of precast piles can be applied to both impact-type precast pile driving mechanisms and hydraulic precast pile driving mechanisms, and its application is wide.

[0024] 3) Dual-axis tilt sensors can be connected to the precast piles before and after pile driving to ensure that the precast piles and the direct piles are vertically aligned before pile driving, preventing tilting when the precast piles are fixed and preventing inconsistencies between the verticality of the support and the verticality of the precast piles.

[0025] 4) When the piling is finished, the verticality of the precast column can be measured again to ensure that the final verticality of the precast pile meets the requirements. Attached Figure Description

[0026] Figure 1 The side view shows the application of the precast pile construction verticality detection method of Embodiment 1 to an impact-type precast pile driving mechanism.

[0027] Figure 2 The diagram shows a front view of the precast pile verticality detection method of Embodiment 2 applied to an impact-type precast pile driving mechanism.

[0028] Figure 3 The side view shows the application of the precast pile verticality detection method of Embodiment 2 to an impact-type precast pile driving mechanism.

[0029] Marked in the attached diagram:

[0030] 1. Dual-axis tilt sensor; 2. Base; 21. Support foot; 3. Bracket; 4. Guide rod; 5. Precast pile; 6. Impact fixing clamp; 61. Hammer guide rod; 7. Impact hammer; 8. Hydraulic cylinder; 9. Pile clamp. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the device proposed by this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, only for the purpose of conveniently and clearly illustrating the embodiments of this invention. Please refer to the accompanying drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this invention. Therefore, they do not have substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives achieved by this invention, should fall within the scope of the technical content disclosed in this invention.

[0032] Example 1

[0033] like Figure 1 As shown, the method for detecting the verticality of precast pile construction in this embodiment includes the following steps:

[0034] 1) Installation of precast pile driving mechanism: The precast pile driving machine arrives at the construction site, and the base 2 of the precast pile driving machine is supported on the ground by adjustable support feet 21. A bracket 3 perpendicular to the base 2 is connected to the base 2. The bracket 3 is connected to two guide rods 4, which are also perpendicular to the base 2. An impact fixing clamp 6 for fixing the precast pile 5 is passed through the guide rod 4. A hammer guide rod 61 is connected to the impact fixing clamp 6. An impact hammer 7 that drives the impact fixing clamp 6 is passed through the hammer guide rod 61. The impact hammer 7 can move up and down on the hammer guide rod 61.

[0035] 2) Sensor installation: Connect the dual-axis tilt sensor 1 to one side of the bracket 3, and connect the dual-axis tilt sensor 1 to the control terminal via a cable;

[0036] 3) Verticality adjustment of the bracket: The dual-axis tilt sensor 1 can detect the verticality of the bracket 3 and transmit the verticality data to the control terminal. The control terminal can control the adjustable support feet 21 to adjust the base 2 to be horizontal based on the verticality data of the bracket 3, so that the bracket 3 is perpendicular to the horizontal plane.

[0037] 4) Precast pile fixing: The precast pile 5 is fixedly connected by impact fixing clamp 6;

[0038] 5) Initial verticality detection of precast piles: A dual-axis tilt sensor 1 is detachably connected to one side of the precast pile 5. The dual-axis tilt sensor 1 is also connected to the control terminal via a cable to directly detect the initial verticality of the precast pile 5. By comparing the verticality of the precast pile 5 and the support 3, if the initial verticality of the precast pile 5 is inconsistent with the verticality of the support 3, it indicates that the precast pile 5 held by the impact fixing clamp 6 is tilted and needs to be adjusted until the initial verticality of the precast pile 5 is consistent with the verticality of the support 3, so that the precast pile 5 and the support 3 are perpendicular to the base 2.

[0039] 6) Precast pile driving and precast pile verticality detection: The impact hammer 7, which moves up and down, drives the impact fixing clamp 6 and the fixed precast pile 5 into the ground together to carry out the precast pile driving operation. During the precast pile driving process, the verticality of the support 3 can be detected in real time by the dual-axis tilt sensor 1. Since the support 3, guide rod 4 and precast pile 5 are all perpendicular to the base 2, the verticality of the support 3 detected by the dual-axis tilt sensor 1 is the verticality of the precast pile 5. The dual-axis tilt sensor 1 transmits the verticality data of the support 3 to the control terminal in real time. The control terminal can adjust the level of the base 2 in real time through the adjustable support foot 21, thereby adjusting the verticality of the support 3. Similarly, the verticality of the precast pile 4 can also be adjusted to ensure that the verticality of the precast pile 4 meets the design requirements.

[0040] 7) Final test of precast pile verticality: After the pile driving is completed, the dual-axis tilt sensor 1 can be detachably connected to one side of the precast pile 5 again, and the dual-axis tilt sensor 1 can be connected to the control terminal through the cable. The verticality of the precast pile 5 can be directly tested again through the dual-axis tilt sensor 1 to perform the final verification of the verticality of the precast pile 5. After the verification is completed, the dual-axis tilt sensor 1 can be detached from one side of the precast pile 5 again.

[0041] The dual-axis tilt sensor 1 includes a connecting base with a connecting hole. The dual-axis tilt sensor 1 is detachably connected to the precast pile 5 via a clamp.

[0042] Support foot 21 is a hydraulic support foot.

[0043] Example 2

[0044] like Figure 2 , Figure 3 As shown, the method for detecting the verticality of precast pile construction in this embodiment includes the following steps:

[0045] 1) Installation of precast pile driving mechanism: The precast pile driving machine arrives at the construction site, and the base 2 of the precast pile driving machine is supported on the ground by adjustable support feet 21. Two brackets 3 perpendicular to the base 2 are connected to the base 2. Two guide rods 4 are connected between each bracket 3 and the base plate 2. The guide rods 4 are also perpendicular to the base 2. The guide rods 4 are fitted with pile clamps 9 for fixing the precast piles 5. The upper side of the bracket 3 is connected to a hydraulic cylinder 8. The drive end of the hydraulic cylinder 8 is connected to the pile clamp 9. The hydraulic cylinder 8 can drive the pile clamp 9 to move up and down on the guide rod 4.

[0046] 2) Sensor installation: Connect the dual-axis tilt sensor 1 to one side of the bracket 3, and connect the dual-axis tilt sensor 1 to the control terminal via a cable;

[0047] 3) Verticality adjustment of the bracket: The dual-axis tilt sensor 1 can detect the verticality of the bracket 3 and transmit the verticality data to the control terminal. The control terminal can control the adjustable support feet 21 to adjust the base 2 to be horizontal based on the verticality data of the bracket 3, so that the bracket 3 is perpendicular to the horizontal plane.

[0048] 4) Precast pile fixing: The precast pile 5 is fixedly connected by clamping the pile clamp 9;

[0049] 5) Initial detection of precast pile verticality: A dual-axis tilt sensor 1 is detachably connected to one side of the precast pile 5. The dual-axis tilt sensor 1 is also connected to the control terminal via a cable to directly detect the initial verticality of the precast pile 5. By comparing the verticality of the precast pile 5 and the support 3, if the initial verticality of the precast pile 5 is inconsistent with the verticality of the support 3, it indicates that the precast pile 5 held by the pile clamp 9 is tilted and needs to be adjusted until the initial verticality of the precast pile 5 is consistent with the verticality of the support 3, so that the precast pile 5 and the support 3 are perpendicular to the base 2.

[0050] 6) Precast pile driving and precast pile verticality detection: The hydraulic cylinder 8 drives the pile clamp 9 and the fixed precast pile 5 to be driven into the ground to carry out the precast pile 5 driving operation. During the precast pile 5 driving process, the verticality of the support 3 can be detected in real time by the dual-axis tilt sensor 1. Since the support 3, guide rod 4 and precast pile 5 are all perpendicular to the base 2, the verticality of the support 3 detected by the dual-axis tilt sensor 1 is the verticality of the precast pile 5. The dual-axis tilt sensor 1 transmits the verticality data of the support 3 to the control terminal in real time. The control terminal can adjust the level of the base 2 in real time through the adjustable support foot 21, thereby adjusting the verticality of the support 3. Similarly, the verticality of the precast pile 4 can also be adjusted to ensure that the verticality of the precast pile 4 meets the design requirements.

[0051] 7) Final test of precast pile verticality: After the pile driving is completed, the dual-axis tilt sensor 1 can be detachably connected to one side of the precast pile 5 again, and the dual-axis tilt sensor 1 can be connected to the control terminal through the cable. The verticality of the precast pile 5 can be directly tested again through the dual-axis tilt sensor 1 to perform the final verification of the verticality of the precast pile 5. After the verification is completed, the dual-axis tilt sensor 1 can be detached from one side of the precast pile 5 again.

[0052] The dual-axis tilt sensor 1 includes a connecting base with a connecting hole. The dual-axis tilt sensor 1 is detachably connected to the precast pile 5 via a clamp.

[0053] Support foot 21 is a hydraulic support foot.

[0054] The dual-axis tilt sensor 1 used in Examples 1 and 2 is the Tianmu Sensor NS-QJ21 series ultra-high precision dual-axis tilt sensor 1, which can measure a maximum angle of ±60 degrees and has a resolution of 0.001 degrees, meeting the actual construction requirements for the verticality accuracy of the piles (generally 1%, currently occasionally higher requirements are 0.25%).

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements should all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method for detecting the verticality of a precast pile, comprising the following steps: 1) installing a precast pile driving mechanism: a precast pile driver reaches the construction site, and the base of the precast pile driver is supported on the ground by adjustable support feet, a support perpendicular to the base is connected to the base, a plurality of guide rods are connected to the support, the guide rods are also perpendicular to the base, a precast pile fixing mechanism for fixing the precast pile is passed through the guide rods, and a driving mechanism for driving the precast pile fixing mechanism is connected to the support; 2) installing a sensor: a dual-axis tilt sensor is connected to one side of the support, and the dual-axis tilt sensor is electrically connected to a control terminal through a cable; 3) adjusting the verticality of the support: the dual-axis tilt sensor can detect the verticality of the support and transmit the data of the verticality to the control terminal, the control terminal can adjust the base to be horizontal according to the data of the verticality of the support, so that the support is perpendicular to the horizontal plane; 4) fixing the precast pile: the precast pile is fixed by the precast pile fixing mechanism, and the precast pile is also perpendicular to the base, after the precast pile fixing mechanism is fixed to the precast pile, the dual-axis tilt sensor is detachably connected to one side of the precast pile for directly detecting the verticality of the precast pile, by comparing the verticality of the precast pile and the support, it can be detected whether the precast pile is perpendicular to the base, to prevent the precast pile fixing mechanism from tilting when fixing the precast pile, after the verticality of the precast pile and the support is adjusted to be consistent, the dual-axis tilt sensor is detached from the precast pile; 5) driving the precast pile and detecting the verticality of the precast pile: the precast pile fixing mechanism and the fixed precast pile are driven into the ground by the driving mechanism, the precast pile is driven, and the verticality of the support is detected in real time by the dual-axis tilt sensor during the driving of the precast pile, since the support, the guide rods and the precast pile are all perpendicular to the base, the verticality of the support detected by the dual-axis tilt sensor is the verticality of the precast pile, the data of the verticality of the support is transmitted to the control terminal in real time by the dual-axis tilt sensor, the control terminal can adjust the level of the base in real time by the adjustable support feet, so as to adjust the verticality of the support, and also adjust the verticality of the precast pile, to ensure that the verticality of the precast pile meets the design requirements, after the driving is completed, the dual-axis tilt sensor is detachably connected to one side of the precast pile again, the verticality of the precast pile is directly detected by the dual-axis tilt sensor again, the final verification of the verticality of the precast pile is performed, and after the verification is completed, the dual-axis tilt sensor is detached from one side of the precast pile.

2. The method for detecting the verticality of the precast pile construction according to claim 1, wherein: The precast pile driving mechanism is an impact type precast pile driving mechanism, the precast pile fixing mechanism of the impact type precast pile driving mechanism is an impact fixing chuck, the impact fixing chuck is passed through the guide rods connected to the support, and the driving mechanism is a hammer provided on the impact fixing chuck, the hammer is arranged on the support in a lifting manner.

3. The method for detecting the verticality of the precast pile construction according to claim 2, characterized in that: A hammer guide rod is connected to the impact fixing chuck, the hammer is passed through the hammer guide rod and can move up and down on the hammer guide rod.

4. The method for detecting the verticality of the precast pile construction according to claim 1, wherein: The precast pile driving mechanism is a hydraulic precast pile driving mechanism, two supports are arranged on the base of the hydraulic precast pile driving mechanism, the driving mechanism is a hydraulic oil cylinder connected to the supports, the precast pile fixing mechanism is a pile clamp connected to the lower side of the driving end of the hydraulic oil cylinder, the pile clamp clamps and fixes the precast pile, and the pile clamp passes through the guide rod between the supports and the base.

5. The method for detecting the verticality of the precast pile construction according to claim 1, wherein: The double-axis inclination sensor comprises a connecting base, a connecting hole is formed in the connecting base, and the double-axis inclination sensor is detachably connected to the precast pile through a hoop.

6. The method for detecting the verticality of the precast pile construction according to claim 1, wherein: The supporting foot is a hydraulic supporting foot.

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