Positioning System for Erection of Static Load Testing Device for Foundation

Abstract

The present invention discloses a positioning system for the erection of a static load testing device for foundation bases, which is composed of a vertical rod, a light projector and a flat remote controller signal-connected thereto. The light projector is installed on the vertical rod and is set to have an adjustable positioning height from the ground, and the target point of the light projector is set to the center of the surface of the pile. The flat remote controller is provided with a microprogram for projection control. By setting the parameters corresponding to the detection working conditions and each component of the static load testing device, the light projector is remotely controlled to emit a projection light beam towards the ground in the erection area, and the bearing plate and the piers of the weight platform are placed and the reference piles are installed based on the projection light beam. By applying the positioning system of the present invention, by setting parameters that conform to the actual working conditions through the light projector and the remote control flat device that only consume electric energy, projection reference light that meets the specification requirements is provided, thereby avoiding relying on the experience of workers and rework, improving the hoisting operation efficiency, achieving accurate and labor-saving erection and being conducive to avoiding potential safety risks.

Description

Technical Field

[0001] The present invention relates to an auxiliary system for static load tests of the foundation of infrastructure, and particularly to a positioning system for the erection of a device for static load detection of the foundation. Background Art

[0002] With the rapid development of the national economy, infrastructure construction is also widely carried out in full swing. Whether it is road construction, various commercial and residential building construction, tower construction, airport and station construction, etc., for large-scale land use, it is necessary to conduct static load test detections on traditional foundations by means of multi-point sampling to evaluate their compaction degree and ensure the structural strength of the buildings constructed thereafter.

[0003] Static load detection has become the main method for detecting the bearing capacity of the foundation due to its accuracy and reliability. However, when conducting this static load test detection, the process of erecting a traditional reaction force and weight platform is complex and its stability is poor, which has become the main factor restricting the safety and accuracy of static load detection. Before the erection of the static load device, the positioning of the bearing plate, pier, main beam, and reference pile becomes the key to the successful erection of the reaction force platform. Taking the composite foundation load test as an example:

[0004] 1. The bearing plate calculated according to the area replacement ratio should cover the pile-soil unit body centered on the pile. However, during the placement process of the bearing plate, there is often no good method for accurate alignment control, and it often relies on the intuitive experience of workers.

[0005] 2. According to the Technical Code for Building Ground Treatment JGJ79-2012, the following conditions need to be met among the edge of the reaction force platform pier, the edge of the bearing plate, and the center of the reference pile: The width and length of the test pit at the test elevation should not be less than 3 times the size of the bearing plate. The fulcrums of the reference beam and the loading platform should be set outside the test pit, and the clear distance from the edge of the bearing plate should not be less than 2m.

[0006] 3. According to the Technical Code for Building Foundation Pile Testing JGJ106-2014, in the single-pile vertical static load test, there are also corresponding requirements for the distance between the center of the test pile and the edge of the reaction force platform fulcrum. The distance between the outer edges of the reaction force platform piers should be adapted to the length of the secondary beam, and the direction of the secondary beam should be perpendicular to the length direction of the reaction force platform piers. The main beams placed on the jacks are symmetrically placed with the center of the jack resultant force as the center, and the direction of the main beams should be parallel to the length direction of the reaction force platform piers. When erecting the reaction force platform, the hoisting personnel place the positions of the reaction force platform piers, main beams, and secondary beams based on experience without accurate positioning. Therefore, once the reaction force blocks are stacked, if the distance between the test pile and the edge of the pier does not meet the specification requirements and the erection of the reaction force platform is asymmetric, etc., it is very difficult to correct, bringing great trouble to subsequent detection operations. Summary of the Invention

[0007] The object of the present invention is to provide a positioning system for the erection of a static load testing device for foundation bases, so as to solve the positioning reference problems of the bearing plate, the piers of the weight platform and the reference piles.

[0008] The technical solution adopted by the present invention to achieve the above object is a positioning system for the erection of a static load testing device for foundation bases, which is characterized in that it consists of a vertical rod, a light projector and a flat remote controller signal-connected thereto, wherein the light projector is mounted on the vertical rod and is set to have an adjustable positioning height from the ground, and the target point of the light projector is set to be the center of the surface of the pile. The flat remote controller is provided with a microprogram for projection control. By setting the parameters corresponding to the detection conditions and the components of the static load testing device, the light projector is remotely controlled to emit a projection beam towards the ground in the erection area, and the bearing plate, the piers of the weight platform are placed and the reference piles are installed based on the projection beam.

[0009] For the above positioning system for the erection of a static load testing device for foundation bases, further, the surface of the vertical rod is provided with a scale ruler and the bottom is in the shape of a ground-inserting steel needle, and it is inserted into the ground at a preset distance S from the center of the surface of the pile and stands upright, and the scale ruler of the vertical rod has an error in the actual height from the ground of less than 1 mm.

[0010] For the above positioning system for the erection of a static load testing device for foundation bases, further, the surface of the vertical rod is provided with a scale ruler and the bottom is connected with a base, a disc-shaped tripod or a multi-legged tripod with more than three legs, and it is placed on the ground at a preset distance S from the center of the surface of the pile and stands upright, and the scale ruler of the vertical rod has an error in the actual height from the ground of less than 1 mm.

[0011] For the above positioning system for the erection of a static load testing device for foundation bases, further, a bracket for loading the light projector is sleeved on the top of the vertical rod, the bracket is fixed at a preset height H of the vertical rod by a quick clamp provided at the bottom, and an angle locator for adjusting the light emission angle of the light projector is provided on the top of the bracket.

[0012] The positioning system for the erection of the static load testing device for foundation and subgrade, further, the microprogram for projection control includes the calculation of the projection beam size and the calculation of the spacing between components, wherein the projection beam size is obtained from the trigonometric conversion of the height and horizontal distance of the light projector relative to the center of the surface of the pile; the spacing calculation is obtained by converting the conditions that need to be satisfied between components defined in the relevant technical specifications for foundation treatment, and the conditions include but are not limited to: a. The reference pile is set outside three times the width of the bearing plate, and the clear distance from the edge of the bearing plate is more than 2 meters. b. The clear distance between the edge of the pier of the weight platform and the edge of the bearing plate is more than 2 meters. c. The outer edge spacing of a pair of piers of the weight platform matches the length of the secondary beam, and the length direction of the secondary beam is perpendicular to the length direction of the pier of the weight platform. d. The length direction of the main beam is parallel to the length direction of the pier of the weight platform, and the main beam is symmetrically placed with the center of the resultant force point of the jacks below it as the center.

[0013] The positioning system for the erection of the static load testing device for foundation and subgrade, further, the parameters include the shape, side length or diameter of the bearing plate, the length and width of the pier of the weight platform, and the lengths of the main beam and the secondary beam.

[0014] Applying the positioning system of the present invention to the erection of the static load testing device for foundation and subgrade has the following significant progressiveness: By setting parameters that conform to the actual working conditions through a light projector and a remote control tablet that only consume electric energy, it provides projection reference rays for the placement or installation of the bearing plate, the pier of the weight platform, and the reference pile, meeting the specification requirements, thereby avoiding relying on the experience of workers and rework; achieving accurate and labor-saving erection, improving the efficiency of the hoisting operation, and reducing the potential safety risks brought about by taking into account the positioning of the device. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the state of the structure and function realization of the positioning system for the erection of the static load testing device for foundation and subgrade of the present invention. Embodiment

[0016] The following will further elaborate on the specific embodiments of the present invention in conjunction with the accompanying drawings of the embodiments, so that the technical solutions of the present invention are easier to understand and master, thereby making a clearer definition of the protection scope of the present invention.

[0017] In view of the deficiencies that the erection of the current static load testing device for foundation and subgrade relies on the experience of workers, does not meet the specification requirements and is difficult to correct, thus affecting the subsequent testing operations, the designer of the present invention innovatively proposed a positioning system corresponding to the erection operation of the static load testing device. By setting the specifications of the device components and parameters that conform to the actual working conditions, it can present reference rays for the placement or installation of the corresponding components on the ground at the erection site, improving the accuracy of the device erection.

[0018] Such as Figure 1As shown, as the components for building the static load testing device for the foundation, it includes a test pile 91, a bearing plate 92 covering the test pile, reference piles 95 distributed around it, load-bearing platform piers 93 distributed on both sides of the bearing plate, and secondary beams 94 built on them. Of course, it also includes necessary equipment such as main beams and jacks not shown in the figure. And in many places, the reference piles and the load-bearing platform piers are defaulted to have zero settlement where the ground strength meets the requirements; while the positioning of the reference piles, load-bearing platform piers, bearing plates, and secondary beams during the construction of the static load testing device will, to a certain extent, affect the accuracy of subsequent testing operations or cause trouble in readjusting the construction.

[0019] The positioning system for building the static load testing device for the foundation, from a technical overview, consists of a vertical rod 1, a light projector 2, and a tablet remote control 3 that is signal-connected to it. The light projector is installed on the vertical rod and set to have an adjustable height from the ground for positioning, and the target point of the light projector is set as the surface center of the test pile (abbreviated as pile, but different from the reference pile). The tablet remote control is equipped with a microprogram for projection control. By setting the parameters corresponding to the detection conditions and each component of the static load testing device, the tablet remote control remotely controls the light projector to emit a projection beam towards the ground in the construction area, and then the hoisting operation can be carried out based on the projection beam for the placement of the bearing plate and the load-bearing platform piers and the installation of the reference piles.

[0020] In the above overview scheme, in order to install the reference piles, load-bearing platform piers, and bearing plates, light projectors are installed at a certain distance and at a high altitude, and the microprogram of the tablet remote control is used to control the output of the projection light of the light projector to make it comply with the relevant technical specifications for building the static load testing device. Combining Figure 1 Taking the example shown, for a square bearing plate, when its side length is set as a parameter and the surface center of the test pile is known, the projection light will form a schematic of the diagonal vertices of the corresponding bearing plate or a schematic of the overall contour of the bearing plate on the ground, which is convenient for the construction workers to accurately place the bearing plate on the test pile. For the placement of the load-bearing platform piers, when its width and the outer shape specifications of the bearing plate are set as parameters and the surface center of the test pile is known, the projection light will form a schematic of the outer long side of the corresponding load-bearing platform pier on the ground, so as to facilitate the construction workers to hoist and transfer the corresponding piers for alignment and dropping.

[0021] To enable the microprogram set in the tablet remote control to better combine with the relevant technical specifications and control the output of highly accurate projection light to the ground to provide a positioning reference for the construction operation, the present invention further refines and optimizes the functions of each device of the above positioning system and provides relatively rich optional implementation modes.

[0022] On the one hand, looking at the vertical rod, as Figure 1As shown in the figure, a scale ruler 11 is provided on the surface of the vertical rod 1, and a tripod 12 is installed at the bottom. It is placed on the ground and kept upright at a preset distance S from the center of the surface of the relative pile. The error between the scale ruler of the vertical rod and the actual height from the ground is less than 1 mm. This requires the installer to manually calibrate the installation of the vertical rod on-site. By adjusting the opening angle or telescopic length of the tripod, the origin (or zero point) of the scale ruler of the vertical rod is made horizontally level with the center of the surface of the test pile, thus ensuring more accurate positioning values of the light projector in the height direction.

[0023] Of course, in addition to the above tripod, it can also be other multi-legged brackets, box-type bases, or disc-type brackets, etc. Or directly set the bottom of the vertical rod as a ground-inserted steel needle shape, as long as it can firmly position the vertical rod to prevent wind and prevent it from tilting and falling.

[0024] Moreover, a bracket 13 for loading the light projector is sleeved on the top of the vertical rod 1. The bracket is fixed at a preset height H on the vertical rod through a quick clamp 14 provided at the bottom, and an angle locator (not shown) for adjusting the light emission angle of the light projector is provided on the top of the bracket. It should be noted that the height H here is measured from the center of the body of the light projector installed on the bracket. In the parameter setting of the tablet remote control and the microprogram compilation, a margin addition has been made to the actual reading of the scale ruler provided on the vertical rod. Therefore, the positioning reading of the bracket on the vertical rod is the parameter setting input to the tablet remote control. When the distance S between the center of the surface of the test pile and the vertical rod and the erection height H of the light projector are determined, the orientation of the light projector can be adjusted and set through the angle locator, so that a single concentrated beam of light forms a fixed-point image at the center of the surface of the test pile.

[0025] On the other hand, from the perspective of the tablet remote control, the microprogram for projection control includes the calculation of the projection beam size and the calculation of the spacing between components. Specifically, the above projection beam size is obtained from the trigonometric function conversion of the height and horizontal distance of the light projector relative to the center of the surface of the pile. For example, assuming the length of the pier of the weight platform support is L1 in the vertical projection and L2 in the ground projection of the light projector, the conversion expression is: And so on for other light and shadow references.

[0026] The calculation of the spacing between the above components is obtained by converting the conditions that need to be met between the components defined in the relevant technical specifications for foundation treatment. The conditions include but are not limited to: a. The reference pile is set outside three times the width of the bearing plate, and the clear distance from the edge of the bearing plate is more than 2 meters (i.e., ≥ 2 meters); b. The clear distance between the edge of the pier of the weight platform support and the edge of the bearing plate is more than 2 meters; c. The outer edge spacing of a pair of piers of the weight platform support matches the length of the secondary beam, and the length direction of the secondary beam is perpendicular to the length direction of the pier of the weight platform support; d. The length direction of the main beam is parallel to the length direction of the pier of the weight platform support, and the main beam is symmetrically placed with the center of the resultant force point of the jacks below it as the center.

[0027] In relation to the conversion with the above conditions, the foregoing parameters include, but are not limited to, the side length of the square bearing plate, the diameter of the circular bearing plate, the length and width of the piers of the weight-bearing platform, the lengths of the main beam and the secondary beam, etc.

[0028] From the introduction of the composition and implementation of the above positioning system, it can be seen that when static load testing of the foundation is required (the positioning of the test pile is known), only an upright pole needs to be installed at a certain distance (custom-defined, not particularly limited) beside it and the light projector is installed in the air. After the actually measured distance S and the reading of the scale are determined, combined with the parameter settings of each component of the static load testing device, the reference light rays that meet the requirements of the device erection technical specifications can be emitted from the light projector to the ground around the test pile. On this basis, the hoisting operators can accurately position the relevant components under the working conditions with reference, not only without relying on experience judgment, but also with higher accuracy. The static load testing device erected in this way will be conducive to the subsequent testing operations and obtain more accurate testing results.

[0029] In summary, from the scheme introduction and detailed description of the embodiments of the positioning system of the present invention, it can be seen that this scheme has prominent substantial features and remarkable progressiveness, manifested as: by setting parameters that conform to the actual working conditions through the light projector and the remote control tablet that only consume electric energy, the projection reference light rays for placing or installing the bearing plate, the piers of the weight-bearing platform and the reference piles are provided, meeting the specification requirements, thus avoiding relying on the experience of workers and rework; achieving accurate and labor-saving erection, improving the hoisting operation efficiency, and reducing the potential safety risks caused by taking into account the device positioning.

[0030] In addition to the above embodiments, the present invention may also have other implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A positioning system for the erection of a static load testing device for foundation bases, characterized in that: It consists of a vertical pole, a light projector, and a tablet remote control that is signal-connected to the light projector. The light projector is installed on the vertical pole and is set to be adjustable in height from the ground and positioned. The target point of the light projector is set to the center of the surface of the pile. The tablet remote control is provided with a microprogram for projection control. By setting the parameters corresponding to the detection conditions and each component of the static load detection device, the light projector is remotely controlled to emit a projection beam towards the ground in the erection area, and the bearing plate, the piers of the weight platform, and the reference pile are installed based on the projection beam.

2. The positioning system for the erection of the static load testing device for foundation bases according to claim 1, characterized in that: The surface of the vertical pole is provided with a scale ruler, and the bottom is in the shape of a ground-inserting steel needle. It is inserted into the ground at a preset distance S from the center of the surface of the pile and stands upright. The scale ruler on the vertical pole has an error in the actual height from the ground of less than 1 mm.

3. The positioning system for the erection of the static load testing device for foundation bases according to claim 1, characterized in that: The surface of the vertical pole is provided with a scale ruler, and the bottom is connected with a base, a disc-shaped tripod, or a multi-leg tripod with more than three legs. It is placed on the ground at a preset distance S from the center of the surface of the pile and stands upright. The scale ruler on the vertical pole has an error in the actual height from the ground of less than 1 mm.

4. The positioning system for the erection of the static load testing device for foundation bases according to claim 1, characterized in that: A bracket for loading the light projector is sleeved on the top of the vertical pole. The bracket is fixed at a preset height H on the vertical pole through a quick clamp provided at the bottom, and an angle locator for adjusting the light emission angle of the light projector is provided on the top of the bracket.

5. The positioning system for the erection of the static load testing device for foundation bases according to claim 1, characterized in that: The microprogram for projection control includes the calculation of the size of the projection beam and the calculation of the spacing of each component. The size of the projection beam is obtained from the trigonometric conversion of the height and horizontal distance of the light projector relative to the center of the surface of the pile. The spacing calculation is obtained based on the conditions that need to be satisfied among the components defined by the relevant technical specifications for ground treatment. The conditions include, but are not limited to: a. The reference pile is set outside three times the width of the bearing plate, and the clear distance from the edge of the bearing plate is more than 2 meters. b. The clear distance between the edge of the pier of the weight platform and the edge of the bearing plate is more than 2 meters. c. The outer edge spacing of a pair of piers of the weight platform matches the length of the secondary beam, and the length direction of the secondary beam is perpendicular to the length direction of the pier of the weight platform. d. The length direction of the main beam is parallel to the length direction of the pier of the weight platform, and the main beam is symmetrically placed with the center of the resultant force point of the jacks below it as the center.

6. The positioning system for setting up the static load testing device for foundation and subgrade, as claimed in claim 1, is characterized in that: The parameters include the shape, side length, or diameter of the bearing plate, the length and width of the pier of the weight platform, and the lengths of the main beam and the secondary beam.

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