A device and method for monitoring the verticality of a precast pipe pile

Abstract

The application discloses a verticality monitoring device and method for prefabricated pipe piles, and relates to the technical field of pile foundation construction. The device comprises a flexible plastic plate and an inductive dynamometer, the inductive dynamometer is installed on the inner wall of the flexible plastic plate, the flexible plastic plate is installed on the inner wall of a vertical steel plate, the inductive dynamometer is internally installed with a prefabricated pipe pile, and the inductive dynamometer is in signal transmission with an external terminal device. The method comprises the following steps: driving a steel drill into the soil and initially leveling through a leveling plate; placing the end of the level gauge on the leveling plate into the limiting hole, and inserting the prefabricated pipe pile into the vertical steel plate until the prefabricated pipe pile is sent into the soil layer, adjusting the vertical steel plate to be horizontal through the level gauge, and making the vertical steel plate perpendicular to the horizontal plane; and monitoring the vertical position of the prefabricated pipe pile when the static pressure is monitored through the inductive dynamometer. The verticality of the steel plate and the steel pipe is ensured through the threaded leveling plate, and the verticality of the prefabricated pipe pile when the static pressure is monitored is guided and adjusted through the vertical steel plate circular hole.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pile foundation construction, in particular to a verticality monitoring device and method for prefabricated pipe piles. BACKGROUND

[0002] At present, most of the foundation pit supports adopt cast-in-place piles (row pile form) and water stop curtains or underground continuous walls, and the prestressed pipe pile support form is less. The cast-in-place pile and the underground continuous wall have long on-site construction time, large environmental impact, and many construction machines. In order to make the foundation pit support pile factory-like and reduce the environmental impact of the construction site, prestressed pipe piles are used for support. In order to ensure the verticality of the prefabricated pipe pile, which plays a decisive role in the stress system of the support structure, the verticality of the pipe pile during the hole drilling and static pressure construction needs to be monitored.

[0003] The utility model discloses a verticality control device based on implantation method prefabricated pipe pile relates to the technical field of building construction, including device shell, the positive surface bottom of device shell is close to both sides edge place and is fixedly installed with connecting shaft. Its fixed cone at the bottom of the fixed frame is hammered into the ground, so that the equipment is stably placed on the ground. When the prefabricated pipe pile is implanted, the connecting rod is moved to tightly attach the angle sensing frame to the prefabricated pipe pile. The pulley fixedly installed on the surface of the angle sensing frame does not affect the implantation of the prefabricated pipe pile. The angle sensing frame senses the angle of the prefabricated pipe pile through the induction line to the sensing device. The sensing device observes the angle of the prefabricated pipe pile by adjusting the angle of the mounting frame through the hydraulic rod. Thus, the implantation angle of the prefabricated pipe pile is adjusted according to the situation at all times through the adjusting block installed on the mounting frame. The auxiliary pulley can prevent the implantation angle from deviating when the surface of the prefabricated pipe pile is rubbed during the fine adjustment, thereby improving the accuracy of the implantation angle of the prefabricated pipe pile. However, the patent has the problem of poor accuracy of the verticality monitoring of the pipe pile during the hole drilling and static pressure construction. SUMMARY

[0004] The present application provides a verticality monitoring device for prefabricated pipe piles to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solutions adopted by the present application are as follows:

[0006] A verticality monitoring device for prefabricated pipe piles, comprising a flexible plastic plate and an inductive dynamometer. The inductive dynamometer is installed on the inner wall of the flexible plastic plate through an adhesive. The flexible plastic plate is installed on the inner wall of a vertical steel plate. The inductive dynamometer is installed on the inside of the prefabricated pipe pile. The inductive dynamometer is connected to an external terminal device for signal transmission. The flexible plastic plate is used to pass through the prefabricated pipe pile, and the soft plastic plate is filled to ensure close contact. Other materials cannot effectively ensure the size deviation of the prefabricated pipe pile.

[0007] Further based on the technical scheme, the vertical steel plate outer wall is provided with a limiting plate, a plurality of limiting holes are arranged on the limiting plate, at least one mounting hole is further arranged on the vertical steel plate, and the signal line of the external terminal device is connected with the inductive dynamometer inside the vertical steel plate through the mounting hole.

[0008] Further based on the technical scheme, the vertical steel plate is vertically installed on the horizontal steel plate, and the vertical steel plate and the horizontal steel plate are integrally formed.

[0009] Further based on the technical scheme, the horizontal steel plate is provided with a steel drill, at least one leveling plate is detachably installed on the steel drill in a horizontal manner, the steel drill is parallel to the vertical steel plate, and the adjusting plate is parallel to the horizontal steel plate.

[0010] Further based on the technical scheme, the leveling plate is detachably provided with a level, and the end of the level is arranged in the limiting hole.

[0011] Further based on the technical scheme, the vertical steel plate is externally surrounded by a reinforcing steel bar for reinforcement welding, and the reinforcing steel bar is externally surrounded by a hoop.

[0012] Further based on the technical scheme, the tip of the prefabricated pipe pile is of a tapered structure, and the outer diameter of one end of the tip is greater than the outer diameter of the other end of the tip.

[0013] A verticality monitoring method of a prefabricated pipe pile uses a verticality monitoring device of the prefabricated pipe pile, and includes the following steps.

[0014] Step 1: The steel drill is driven into the soil, and the leveling plate is used for preliminary leveling.

[0015] Step 2: The end of the level on the leveling plate is arranged in the limiting hole, the prefabricated pipe pile is inserted into the vertical steel plate until it is sent into the soil layer, the vertical steel plate is adjusted to be horizontal by the level, and the vertical steel plate is perpendicular to the horizontal plane.

[0016] Step 3: The vertical position of the prefabricated pipe pile is monitored by the inductive dynamometer in the static pressure state. The device only provides monitoring and feedback to the construction personnel to ensure that the prefabricated pipe pile is within the specified verticality.

[0017] Further based on the technical scheme, when the inductive dynamometer detects that the verticality has a deviation, the prefabricated pipe pile is alarmed by calculating the horizontal deviation value of the maximum vertical deviation value, and the leveling plate is adjusted according to the deviation value.

[0018] Further based on the technical scheme, the deviation of the prefabricated pipe pile is not greater than 50 mm, and the deviation of the verticality is not greater than 0.1°.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The present application ensures the steel plate level and the steel pipe verticality through the screw leveling plate, and simultaneously guides and adjusts the verticality of the precast pipe pile during the horizontal static pressure through the vertical steel plate round hole; and the flexible plastic plate inductive dynamometer monitors the verticality deviation and alarms and marks when the verticality exceeds the standard requirement, that is, the monitoring device ensures the real-time monitoring of the precast pipe pile verticality in the static pressure state. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a plan view of the verticality monitoring device of the present application;

[0022] Figure 2 It is an A-A sectional view of Figure 1 ;

[0023] Figure 3 It is a partial enlarged view of Figure 2 ;

[0024] Reference signs: 1. Flexible plastic plate; 2. Inductive dynamometer; 3. Vertical steel plate; 4. Horizontal steel plate; 5. Limiting plate; 6. Signal line; 7. Steel drill; 8. Leveling plate; 9. Level gauge; 10. Steel bar; 11. Hoop; 12. Preformed pipe pile; 13. Pilot hole. DETAILED DESCRIPTION

[0025] The present application will be further described and illustrated below in conjunction with the drawings and specific embodiments. The technical features of each embodiment of the present application can be combined accordingly without conflict.

[0026] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in conjunction with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the concept of the present application, so the present application is not limited by the specific embodiments disclosed below. The technical features of each embodiment of the present application can be combined accordingly without conflict.

[0027] In the description of the present application, it should be understood that when an element is considered to be "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element with an intermediate element. In contrast, when an element is considered to be "directly" connected to another element, there is no intermediate element.

[0028] Example 1

[0029] As Figures 1-3As shown, a verticality monitoring device for a precast pipe pile 12 includes a flexible plastic plate 1 and an inductive dynamometer 2, the inductive dynamometer 2 is installed on the inner wall of the flexible plastic plate 1 by an adhesive, the flexible plastic plate 1 is installed on the inner wall of a vertical steel plate 3, the inductive dynamometer 2 is installed on the inner side of the precast pipe pile 12, and the inductive dynamometer 2 is in signal transmission with an external terminal device.

[0030] Specifically, the vertical steel plate 3 is provided with a limiting plate 5 on the outer wall, the limiting plate 5 is provided with a plurality of limiting holes, and at least one mounting hole is formed on the vertical steel plate 3, and the signal line 6 of the external terminal device is connected with the inductive dynamometer 2 on the inner side of the vertical steel plate 3 through the mounting hole. The verticality monitoring device further comprises a horizontal steel plate 4, the vertical steel plate 3 is vertically installed on the horizontal steel plate 4, and the vertical steel plate 3 and the horizontal steel plate 4 are integrally formed. A steel drill 7 is installed on the horizontal steel plate 4, and a round hole is formed on the horizontal steel plate 4 to facilitate alignment with the guide hole 13. At least one leveling plate 8 is detachably installed on the steel drill 7 horizontally, and the steel drill 7 is parallel to the vertical steel plate 3, and the adjusting plate is parallel to the horizontal steel plate 4. A level 9 is detachably installed on the leveling plate 8, and the end of the level 9 is placed in the limiting hole. The vertical steel plate 3 is externally surrounded by a steel bar 10 for reinforcement welding, and the steel bar 10 is externally surrounded by a hoop 11.

[0031] The working principle of the device is as follows:

[0032] By adjusting the steel drill 7 and the horizontal steel plate 4, the round hole of the horizontal steel plate 4 is aligned with the position of the guide hole 13, the horizontal steel plate 4 is adjusted to be vertical along the position of the guide hole 13, the precast pipe pile 12 passes through the round hole, the hoop 11 is adjusted to tightly fit the precast pipe pile 12, and the connected external terminal instrument is adjusted to zero the data of the terminal instrument. In the static pressure state, the precast pipe pile is inclined due to the verticality of the guide hole 13 during the construction process, in order to ensure that the verticality is within the control range, the stress direction of the precast pipe pile machine in the static pressure state is adjusted. The tip of the precast pipe pile 12 is a tapered structure, one end of the tip has an outer diameter slightly smaller than the inner diameter of the guide hole 13, and the other end of the tip has an outer diameter larger than the inner diameter of the guide hole 13. The setting of this tip structure is on one hand to facilitate the easy entry of the small outer diameter end into the guide hole 13, and on the other hand to facilitate the fixation perpendicular to the horizontal plane, and the tapered structure effectively reduces the unnecessary friction damage to the tip during the installation process of the precast pipe pile 12.

[0033] Embodiment 2

[0034] A verticality monitoring device for a precast pipe pile 12 based on embodiment 1, a verticality monitoring method for a precast pipe pile 12, comprising the following steps:

[0035] Step 1: the steel drill 7 is driven into the soil, and the leveling plate 8 is used for preliminary leveling; Step 2: the end of the level 9 on the leveling plate 8 is placed in the limiting hole, and the prefabricated pipe pile 12 is inserted into the vertical steel plate 3 until it is sent into the soil layer, and the vertical steel plate 3 is adjusted to be horizontal by the level 9, so that the vertical steel plate 3 is perpendicular to the horizontal plane; Step 3: the vertical position of the prefabricated pipe pile 12 is monitored by the inductive force gauge 2 in the static pressure state, wherein the prefabricated pipe pile machine in the static pressure state is adjusted to ensure that the verticality of the pile meets the specification, and the device only provides monitoring and feedback to the construction personnel. Specifically, the prefabricated pipe pile machine in the static pressure state is installed on the upper end of the monitoring device, the hole position of the prefabricated pipe pile machine in the static pressure state is aligned with the hole position of the monitoring device, the prefabricated pipe pile is placed in the hole position of the prefabricated pipe pile machine by the prefabricated pipe pile machine in the static pressure state, and the prefabricated pipe pile is clamped and stabilized by the hydraulic device, and then the prefabricated pipe pile is pressed into the soil by the hydraulic device. When the inductive force gauge 2 detects that the verticality deviates, the prefabricated pipe pile 12 is alarmed by calculating the horizontal deviation value of the maximum vertical deviation value, and the leveling plate 8 is adjusted according to the deviation value. Specifically, the maximum horizontal distance of each segment of the combined pile is calculated by the length of the prefabricated pipe pile and the deviation ratio of the center point position of the prefabricated pipe pile, and the horizontal distance is controlled by using the excel table, wherein the horizontal distance refers to the distance between the center point of the prefabricated pipe pile and the driving center point thereof. The horizontal distance of each segment of the pile is calculated according to the ratio of the total length of the construction pile to the value of the specification level, and if the horizontal distance exceeds the specified deviation value required by the specification, an alarm is given for the horizontal distance of each segment of the construction pile. For example, the total length of the construction pile is 20m, the pile length is 2 segments of 10m, and the maximum pile position deviation required by the specification is 50mm. According to the ratio of 20m to 50mm, the maximum horizontal distance of each segment of the pile is calculated and controlled. The pile position deviation of the prefabricated pipe pile 12 is not greater than 50mm, and the verticality deviation is not greater than 0.1°.

[0036] Specifically, the method is aimed at the derived original drill hole with a certain inclination, which causes the prefabricated pipe pile 12 to have already been inclined in the static pressure state. In order to ensure that the verticality of the prefabricated pipe pile in the static pressure state meets the specification requirements and to reduce the deviation of the prefabricated pipe pile 12 itself, the deviation value of the prefabricated pipe pile 12 is recorded in the terminal instrument, and the verticality precision is ensured by monitoring and adjusting the deviation value.

[0037] Finally, it should be noted that the above content is only used to illustrate the technical solutions of the present application, and is not a limitation on the protection scope of the present application. Simple modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A method for monitoring the verticality of precast pipe piles using a verticality monitoring device, characterized in that, The verticality monitoring device includes a flexible plastic plate and a force gauge. The force gauge is installed on the inner wall of the flexible plastic plate, and the flexible plastic plate is installed on the inner wall of the vertical steel plate. Precast pipe piles are installed inside the force gauge, and the force gauge transmits signals to external terminal equipment. The vertical steel plate is provided with a limiting plate on its outer wall, and the limiting plate is provided with several limiting holes. At least one mounting hole is also provided on the vertical steel plate. The signal line of the external terminal device passes through the mounting hole and connects to the inductive force gauge on the inner side of the vertical steel plate. The vertical steel plate is surrounded by reinforcing bars, and the reinforcing bars are surrounded by clamps; the vertical steel plate is made to fit tightly against the precast pipe pile body by adjusting the clamps; It also includes horizontal steel plates, vertical steel plates installed vertically on the horizontal steel plates, and the vertical steel plates and horizontal steel plates are integrally formed; A steel rod is installed on the horizontal steel plate, and at least one adjusting plate is detachably installed on the steel rod horizontally. The steel rod is parallel to the vertical steel plate, and the adjusting plate is parallel to the horizontal steel plate. A level is detachably mounted on the adjusting plate, with the end of the level placed inside a limiting hole; The method includes the following steps: Step 1: Drive the steel rod below the ground level and use a leveling plate for initial leveling; Step 2: Place the end of the level on the adjusting plate into the limiting hole, and insert the precast pipe pile into the vertical steel plate until it is driven into the soil layer. Adjust the vertical steel plate to be horizontal by using the level to make the vertical steel plate perpendicular to the horizontal plane. Step 3: Monitor the vertical position of the precast pipe pile under static pressure using an inductive force gauge.

2. The method for monitoring the verticality of precast pipe piles using a verticality monitoring device according to claim 1, characterized in that, When the inductive force gauge detects a deviation in verticality, it calculates the horizontal deviation value of the maximum vertical deviation value, triggers an alarm for the precast pipe pile, and adjusts the adjustment plate according to the deviation value.

3. The method for monitoring the verticality of precast pipe piles using a verticality monitoring device according to claim 2, characterized in that, The precast pipe pile position deviation is no greater than 50mm, and the verticality deviation is no greater than 0.1°.

4. The method for monitoring the verticality of precast pipe piles using a verticality monitoring device according to claim 1, characterized in that, The precast pipe pile tip has a tapered structure, with the outer diameter of one end of the pile tip being larger than the outer diameter of the other end.

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