CN118392126A - Pile foundation settlement detection system and detection method for engineering detection - Google Patents

Abstract

The invention provides a pile foundation settlement detection system and a detection method for engineering detection, which belong to the technical field of displacement distance measurement equipment and comprise a butt joint assembly used for being connected with a pile foundation, a detection platform capable of being arranged on one side of the pile foundation, and a measurement assembly arranged on the detection platform and connected with the butt joint assembly for measuring the settlement size of the pile foundation; the butt joint assembly is connected to the outer surface of the pile foundation; the measuring assembly comprises a liquid container and an indicating container which are arranged on the detecting platform, wherein the liquid container and the indicating container are columnar and hollow in the inside, the liquid container and the indicating container are communicated through a pipeline, a piston is arranged in the liquid container, and the piston is connected with the abutting assembly; the pile foundation settlement detection system and the detection platform calibration method can continuously detect settlement of the pile foundation under the daily use state that the pile foundation is constructed.

Description

Pile foundation settlement detection system and detection method for engineering detection

Technical Field

The invention belongs to the technical field of displacement distance measuring equipment, relates to a technology for establishing a measurement standard, and in particular relates to a pile foundation settlement detecting system and a pile foundation settlement detecting method for engineering detection.

Background

Pile foundations are a deep foundation for construction engineering. The pile is composed of one or more piles, and the load of the building is transmitted to a soil layer or rock which is deeper and stronger in the ground through the piles, so that the stability and the safety of the building are ensured.

In pile foundation construction engineering, a single pile vertical compression-resistant static load experiment is usually carried out, and an experimental method for researching the bearing performance of a pile foundation under vertical stress is used. In the experiment, the test pile is embedded into the soil body, then vertical downward static load is applied, and the bearing capacity and deformation characteristics of the pile foundation are evaluated by measuring parameters such as the settlement distance and the strain of the pile body.

However, the conventional pile foundation static load test only tests for a few days, and cannot continuously detect the pile foundation settlement distance, but for a region with complicated geological conditions or easy geological change, the pile foundation settlement speed may exceed the expected speed, and the pile foundation settlement distance change is large, so that a great potential safety hazard may be caused.

Disclosure of Invention

Based on the above, an object of the present invention is to provide a pile foundation settlement detection system for engineering detection for detecting a settlement size of a pile foundation in a normal use state; the pile foundation settlement detection system for engineering detection comprises: the device comprises a butt joint assembly used for being connected with a pile foundation, a detection platform capable of being installed on one side of the pile foundation, and a measurement assembly arranged on the detection platform and connected with the butt joint assembly and used for measuring the settlement size of the pile foundation;

The butt joint assembly is connected to the outer surface of the pile foundation; the measuring assembly comprises a liquid container and an indicating container which are arranged on the detecting platform, wherein the liquid container and the indicating container are columnar and hollow in the inside, the liquid container and the indicating container are communicated through a pipeline, a piston is arranged in the liquid container, and the piston is connected with the abutting assembly;

The measuring assembly further comprises a liquid level sensor for detecting a liquid level indicative of the interior of the container; indicating that the cross-sectional area of the container interior space is smaller than the cross-sectional area of the liquid container interior space, the liquid container interior being filled with liquid; when pile foundation subsides, the butt joint subassembly promotes the piston and removes, and then changes the inside liquid height of instruction container.

Preferably, a buoyancy unit is arranged in the indication container, the buoyancy unit can float on the top surface of the liquid, and the liquid level sensor is a distance sensor arranged on the top of the indication container and used for measuring the distance of the buoyancy unit;

The side face of the indication container is provided with a gas output channel, the end part of the gas output channel is provided with a channel bracket, the inner wall of the gas output channel is provided with a conical surface, a blocking sphere is placed in the conical surface, and a blocking spring is arranged between the blocking sphere and the channel bracket;

the blocking spring can push the blocking ball body to contact the conical surface so as to block the gas output channel, when the liquid in the indicating container rises, the air pressure in the indicating container increases, the air pressure pushes the blocking ball body and compresses the blocking spring, and after the gas is discharged through the gas output channel, the spring pushes the blocking ball body to contact the conical surface, so that sundries are prevented from entering the indicating container.

Preferably, the bottoms of the liquid container and the indication container are provided with connecting columns with external threads, the connecting parts of the pipeline and the liquid container and the indication container are provided with connecting rings with internal threads, the two ends of the pipeline are provided with flange rings which can be clamped in the connecting rings, the connecting rings are connected with the connecting columns through threads, the connecting rings can push the flange rings to contact the connecting columns, and the two ends of the pipeline are respectively and tightly connected with the bottoms of the liquid container and the indication container.

Preferably, the butt joint assembly comprises a laminating plate laminated on the surface of the pile foundation, the proximal end of the laminating plate is connected with the surface of the pile foundation, a connecting hole is formed in the distal end of the laminating plate, a connecting rod is arranged at one end, close to the butt joint assembly, of the piston, the connecting rod penetrates through the connecting hole, external threads are formed on the connecting rod, two nuts matched with the external threads are arranged on the external threads, and the two nuts are respectively arranged at two ends of the laminating plate;

The measuring assembly further comprises a rear cover plate and a front cover plate, the rear cover plate, the front cover plate and the detection platform can enclose a containing space, and the liquid container and the indicating container are arranged in the containing space; the rear cover plate is connected with the front cover plate through a fastener, a connecting groove formed by two layers of protruding parts is formed in the connecting parts of the rear cover plate, the front cover plate and the detection platform, and the edge of the detection platform is arranged in the connecting groove; and the two layers of protruding parts are also provided with clamping assemblies for clamping the two layers of protruding parts, and the protruding parts are tightly attached to two sides of the detection platform by the clamping assemblies.

Preferably, the detection platform is fixed on the side surface of the pile foundation through at least three ground inserting rods, the detection platform is uniformly provided with ground inserting holes with the same number as that of the ground inserting rods, each ground inserting rod comprises a proximal end and a distal end, the proximal end of each ground inserting rod is provided with external threads, two nuts matched with the external threads are arranged on the external threads, the distal end of each ground inserting rod is provided with a tip, and the distal end of each ground inserting rod can be inserted into the ground surface so as to fix the position of the detection platform;

The proximal end of the ground inserting rod can penetrate through the ground inserting hole, and two nuts on the ground inserting rod are respectively arranged at two ends of the detection platform so as to play a role in fixing the ground inserting rod and the detection platform.

Preferably, the detection platform is provided with at least three calibration interfaces, the calibration interfaces are used for being connected with a calibration device, the calibration device is detachably connected to the detection platform, and the calibration device is used for indicating the position of the detection platform and the levelness of the detection platform.

Preferably, the calibration device comprises a calibration platform, a ground rod for fixing the calibration platform, and a hose for connecting the calibration platform and the detection platform;

the ground inserting rod comprises a near end and a far end, wherein the near end of the ground inserting rod is provided with external threads, two nuts matched with the external threads are arranged on the external threads, the far end of the ground inserting rod is provided with a tip, and the far end of the ground inserting rod can be inserted into the ground surface so as to fix the position of the calibration platform; at least one calibration interface is arranged on the calibration platform;

connectors are arranged at two ends of the hose, the hose can be connected with the calibration interface through the connectors, and indication marks are arranged on the connectors;

The two ends of the hose are respectively fixed on the detection platform and the calibration platform through connectors, liquid can be filled in the hose, and the liquid level position of the liquid and the indication mark can indicate the relative positions of the detection platform and the calibration platform.

Preferably, a positioning assembly is provided on the connector, and the positioning assembly includes: the connector comprises a fixed ring arranged on the connector, a movable ring sleeved on the connector and capable of sliding along the length direction of the connector, and a positioning spring pushing the movable ring to move in a direction approaching to the fixed ring; conical protruding parts are arranged on the fixed ring and the movable ring, and the conical protruding parts are arranged on the opposite side surfaces of the fixed ring and the movable ring; the calibration interfaces on the calibration platform and/or the reference platform are calibration holes, and the two ends of each calibration hole are provided with inclined chamfers matched with the shape of the conical protruding part; the positioning spring can push the fixed ring and the movable ring to clamp the calibration platform and/or the reference platform from the two ends of the calibration hole, and the conical protruding part is contacted with the inclined chamfer to enable the connector to be kept at the center of the calibration interface;

The end part of the connector is also provided with a liquid leakage prevention assembly, and the liquid leakage prevention assembly comprises a liquid filling pipe arranged at the end part of the connector, a light ball and a heavy ball arranged in the liquid filling pipe, and a limiting piece for limiting the positions of the light ball and the heavy ball;

The limiting piece comprises a blocking limiting piece which is arranged close to the head of the connector and a permeable limiting piece which is far away from the head of the connector, wherein a light ball and a heavy ball are arranged between the blocking limiting piece and the permeable limiting piece, and liquid cannot pass through the blocking limiting piece when the light ball is contacted with the blocking limiting piece; when the heavy ball contacts with the passable limiting piece, the liquid can pass through the blocking limiting piece; the light spheres are capable of floating on the surface of the liquid and the heavy spheres are not capable of floating on the surface.

The invention further aims to provide a calibration method for the detection platform of the pile foundation settlement detection system for engineering detection, wherein the detection platform is provided with A calibration interfaces, and A is not less than 3; the calibration platform is also provided with A calibration interfaces;

the method comprises the following steps:

determining the position and levelness of the calibration platform, so that the calibration platform is kept at a horizontal position;

the test platform and the calibration platform are connected through A hoses, any calibration interface of the test platform and the calibration platform is connected with a hose, and liquid is filled in the A hoses;

the liquid in the hose is adjusted one by one, so that the liquid level in the calibration platform connector corresponds to the indication mark of the calibration platform connector;

determining whether the liquid level inside the detection platform connector corresponds to an indication mark of the detection platform connector;

if the liquid level inside the detection platform connector corresponds to the indication mark of the detection platform connector, the detection platform is indicated to be horizontal and is consistent with the calibration platform in height;

If the liquid level inside the detection platform connector does not correspond to the indication mark of the detection platform connector, the detection platform is not level or inconsistent with the height of the calibration platform.

The invention further aims to provide a calibration method for the detection platform of the pile foundation settlement detection system for engineering detection, wherein the detection platform is provided with A calibration interfaces, A is not less than 3, and the A calibration interfaces are respectively a calibration interface A1 and a calibration interface A2 … … calibration interface AN; the calibration platform is provided with 1 calibration interface;

the method comprises the following steps:

Step S1: determining the position and levelness of the calibration platform, so that the calibration platform is kept at a horizontal position;

step S2: the hose is connected with a calibration interface A1 of the detection platform and a detection interface of the calibration platform, and liquid is filled in the hose;

Step S3-1: adjusting the liquid in the hose to enable the liquid level in the calibration platform connector to correspond to the indication mark of the calibration platform connector;

step S3-2: determining whether the liquid level inside the detection platform connector corresponds to an indication mark of the detection platform connector;

if the liquid level inside the detection platform connector corresponds to the indication mark of the detection platform connector, turning to step S4;

if the liquid level inside the detection platform connector does not correspond to the indication mark of the detection platform connector, the detection platform is not horizontal or is inconsistent with the calibration platform in height;

Step S4: replacing the calibration interface connecting hose of the detection platform, and repeating the step S3-1 and the step S3-2 until the calibration interface A1 and the calibration interface A2 … … calibrate the interface AN at least once;

And if the liquid level inside the detection platform connector is calibrated each time and the indication mark of the detection platform connector corresponds to the level of the detection platform and is consistent with the height of the calibration platform.

According to the pile foundation settlement detection system for engineering detection, disclosed by the embodiment of the invention, the settlement of the pile foundation can be continuously detected under the daily use state that the pile foundation is built, the pile foundation settlement detection system is arranged near the pile foundation and is connected with the pile foundation, the pile foundation pushes the piston to move after settlement, the liquid level in the container is only increased, and finally the settlement condition and the settlement distance of the pile foundation are detected by the liquid level sensor. The invention further provides a calibration device and a calibration method of the detection platform, which are used for periodically determining whether the position of the detection platform changes or not.

Drawings

The disclosure includes the accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate various exemplary embodiments, features and aspects of the disclosure and together with the description, serve to explain the principles of the disclosure. The present invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings. Wherein:

FIG. 1 is a state diagram of the use of a pile foundation settlement detection system for engineering detection according to an embodiment of the invention;

FIG. 2 is a schematic diagram of a detection platform of a pile foundation settlement detection system for engineering detection according to an embodiment of the invention;

FIG. 3 is a schematic illustration of a liquid container and an indicator container of a pile foundation settlement detection system for engineering inspection according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a front cover plate of a pile foundation settlement detection system for engineering detection according to an embodiment of the invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a partial enlarged view at B in FIG. 4;

FIG. 7 is a schematic diagram of a calibration platform and a detection platform connection hose state of a pile foundation settlement detection system for engineering detection according to an embodiment of the invention;

FIG. 8 is a schematic diagram of a connector of a pile foundation settlement detection system for engineering detection according to an embodiment of the invention;

FIG. 9 is a cross-sectional view of a connector of a pile foundation settlement detection system for engineering detection according to an embodiment of the invention;

FIG. 10 is a schematic view of a detection platform of a pile foundation settlement detection system for engineering detection according to an embodiment of the invention;

FIG. 11 is a schematic diagram of calibration of a detection platform of a pile foundation settlement detection system for engineering detection according to an embodiment of the invention;

Fig. 12 is a schematic view of a conical protrusion and a beveled chamfer of a pile foundation settlement detection system for engineering inspection according to an embodiment of the invention.

Wherein: the detection platform 10, the liquid container 11, the indication container 12, the pipe 13, the flange ring 131, the piston 14, the distance sensor 15, the gas output channel 16, the conical surface 161, the blocking sphere 162, the channel bracket 17, the blocking spring 18, the connecting post 19, the connecting ring 191, the attaching plate 20, the connecting hole 21, the connecting rod 22, the pile foundation 30, the nut 40, the rear cover plate 41, the front cover plate 42, the protruding part 43, the ground inserting rod 44, the ground inserting hole 45, the conical protruding part 46, the inclined chamfer 47, the calibration interface 50, the hose 51, the calibration platform 52, the indication mark 53, the GNSS positioning instrument 60, the fixed ring 61, the movable ring 62, the positioning spring 63, the liquid filling pipe 71, the heavy ball 72, the light ball 73, the blocking stopper 74, the passing stopper 75.

Detailed Description

The technical scheme of the present invention will be described in further detail below by way of examples with reference to the accompanying drawings, but the present invention is not limited to the following examples.

Pile foundation 30 is a deep foundation for construction. The pile is composed of one or more piles, and the load of the building is transmitted to a soil layer or rock which is deeper and stronger in the ground through the piles, so that the stability and the safety of the building are ensured. In the construction engineering of the pile foundation 30, a single pile vertical compression-resistant static load experiment is usually carried out, and an experimental method for researching the bearing performance of the pile foundation 30 under vertical stress is used. In the experiment, the test pile is embedded into the soil body, then vertical downward static load is applied, and the bearing capacity and deformation characteristics of the pile foundation 30 are evaluated by measuring parameters such as the settlement distance and the strain of the pile body.

However, the usual static load test of the pile foundation 30 only tests for a few days, and cannot continuously detect the sedimentation distance of the pile foundation 30, but for a region with complicated geological conditions or easy geological change, the sedimentation speed of the pile foundation 30 may exceed the expected value, and the large sedimentation distance change of the pile foundation 30 may cause a large potential safety hazard.

In order to solve the above problems, an object of the present invention is to provide a pile foundation 30 settlement detection system for engineering detection for detecting the settlement size of the pile foundation 30 in a normal use state; the pile foundation 30 settlement detection system for engineering detection comprises: the device comprises a butt joint assembly used for being connected with a pile foundation 30, a detection platform 10 capable of being installed on one side of the pile foundation 30, and a measurement assembly arranged on the detection platform 10 and connected with the butt joint assembly and used for measuring the settlement size of the pile foundation 30;

the docking assembly is connected to the outer surface of the pile foundation 30; the measuring assembly comprises a liquid container 11 and an indicating container 12 which are arranged on the detecting platform 10, wherein the liquid container 11 and the indicating container 12 are columnar and hollow in the inside, the liquid container 11 and the indicating container 12 are communicated through a pipeline 13, a piston 14 is arranged in the liquid container 11, and the piston 14 is connected with the abutting assembly;

The measurement assembly further includes a level sensor for detecting a level of liquid within the indicating container 12; indicating that the cross-sectional area of the inner space of the container 12 is smaller than the cross-sectional area of the inner space of the liquid container 11, the inside of the liquid container 11 being filled with liquid; as pile foundation 30 subsides, the docking assembly pushes piston 14 to move, thereby changing the liquid level inside indicator vessel 12.

In this embodiment, as shown in fig. 1, a pile foundation 30 settlement detection system for engineering detection is installed on a side surface of a pile foundation 30, where the pile foundation 30 is in a use state, and in a specific implementation process, a space for installing the pile foundation 30 settlement detection system needs to be set at a proper position beside the pile foundation 30, for example, a space is set at a corresponding position of a pier on the ground, and a detection platform 10 of the pile foundation 30 settlement detection system is in the space.

The docking assembly can be connected to the outer surface of the side face of the pile foundation 30 in an adhering mode or by using a fastener, the docking assembly is arranged above the detection platform 10, the docking assembly is connected with the piston 14, and the pile foundation 30 is settled to drive the piston 14 to move in the liquid container 11 and push liquid in the liquid container 11 to flow into the indication container 12 through the pipeline 13.

The liquid container 11 and the indication container 12 of the present embodiment are hollow columns, and a rubber ring is provided between the piston 14 and the inner wall of the liquid container 11 for tightly adhering the piston 14 to the liquid container 11.

The level sensor may be a conductive element disposed within the indicating container 12, and the resistance or capacitance within the conductive element changes after the liquid level changes, and a processor coupled to the level sensor may be capable of determining the liquid level within the indicating container 12 based on the electrical signal.

Indicating that the cross-sectional area of the interior space of the container 12 is smaller than the cross-sectional area of the interior space of the liquid container 11 means that the piston 14 moves a distance inside the liquid container 11 smaller than the distance indicating a change in the liquid level in the container 12. If the indicating container 12 is provided with scales, the liquid level change inside the liquid container 11 can be observed by naked eyes during manual inspection, so that the change of the liquid level can be more sensitively found. Meanwhile, the ratio of the cross-sectional area of the internal space of the indication vessel 12 to the cross-sectional area of the internal space of the liquid vessel 11 is a known ratio, and the size of the settlement of the pile foundation 30 can be estimated from the distance of the liquid level change in the indication vessel 12. When pile foundation 30 subsides, the butt joint subassembly promotes piston 14 to remove, and then changes the inside liquid height of instruction container 12, and level sensor can detect the change of liquid level in the instruction container 12, and then can detect pile foundation 30 subsides the condition and calculate the distance of pile foundation 30 subsides the displacement.

Further, a buoyancy unit is arranged in the indicating container 12, the buoyancy unit can float on the top surface of the liquid, the liquid level sensor is a distance sensor 15 arranged on the top of the indicating container 12, and the distance sensor 15 is used for measuring the distance of the buoyancy unit;

The side surface of the indication container 12 is provided with a gas output channel 16, the end part of the gas output channel 16 is provided with a channel bracket 17, the inner wall of the gas output channel 16 is provided with a conical surface 161, a blocking sphere 162 is placed in the conical surface 161, and a blocking spring 18 is arranged between the blocking sphere 162 and the channel bracket 17;

The blocking spring 18 can push the blocking ball 162 to contact the conical surface 161 so as to block the gas output channel 16, when the liquid in the indicating container 12 rises, the air pressure in the indicating container 12 increases, the air pressure pushes the blocking ball 162 and compresses the blocking spring 18, and after the gas is discharged through the gas output channel 16, the spring pushes the blocking ball 162 to contact the conical surface 161, so that sundries are prevented from entering the indicating container 12.

In some embodiments, the interior of the indicator vessel 12 is provided with a buoyancy element made of a material having a density substantially less than the density of the liquid in the interior of the indicator vessel 12, and the surface of the buoyancy element opposite the distance sensor 15 may be planar to reduce measurement errors. The distance sensor 15 may be a distance sensor 15 that is far away by using laser ranging, that is, the distance sensor 15 emits laser light to the buoyancy unit, and the laser light is reflected by the buoyancy unit and is detected by the distance sensor 15 again, so that a distance value between the distance sensor 15 and the buoyancy unit is measured.

As shown in fig. 2, 3 and 4, the gas output passage 16 is used to discharge the gas above the buoyancy unit when the buoyancy unit moves upward, and also to prevent external impurities from entering the inside of the indicating container 12, thereby preventing the distance sensor 15 from being disturbed.

As shown in fig. 5, the blocking spring 18 is in a compressed state, the pushing force of the blocking unit can push the blocking sphere 162 to be clung to the conical surface 161, the internal space and the external space of the indication container 12 are isolated, when the buoyancy unit moves upwards, the air above the buoyancy unit is compressed so as to push the blocking sphere 162 and the blocking spring 18, and the air flows out from the gap between the blocking sphere 162 and the conical surface 161. It should be noted that the thrust force generated by the compression of the air is much greater than the pre-compression force of the spring, and the blocking sphere 162 hardly blocks the upward movement of the buoyancy unit.

Further, the bottoms of the liquid container 11 and the indicating container 12 are provided with connecting columns 19 with external threads, connecting parts of the pipeline 13 and the liquid container 11 and the indicating container 12 are provided with connecting rings 191 with internal threads, two ends of the pipeline 13 are provided with flange rings 131 which can be clamped in the connecting rings 191, the connecting rings 191 are in threaded connection with the connecting columns 19, the connecting rings 191 can push the flange rings 131 to contact the connecting columns 19, and two ends of the pipeline 13 are respectively and tightly connected with the bottoms of the liquid container 11 and the indicating container 12.

In this embodiment, as shown in fig. 3 and 4, the connecting column 19 is hollow inside and communicates with the internal space of the liquid container 11/the indicating container 12, and the liquid inside the liquid container 11 can flow in from one end of the pipe 13 through the connecting column 19 of the liquid container 11 and out from the other end of the pipe 13, and finally flows into the indicating container 12 through the connecting column 19 at the bottom of the indicating container 12.

The connecting column 19 is used for connecting the pipeline 13 in cooperation with the connecting ring 191, and ensures that the sealing performance of the connecting position is good, and liquid cannot overflow from the connecting position. The inside groove that can block flange ring 131 that is provided with of go-between 191, go-between 191 pass flange ring 131 earlier then screw up on the external screw thread of spliced pole 19, and flange ring 131 closely laminates with spliced pole 19 after tightening up.

Further, the butt joint assembly comprises a jointing plate 20 jointed on the surface of the pile foundation 30, the proximal end of the jointing plate 20 is connected with the surface of the pile foundation 30, a connecting hole 21 is formed in the distal end of the jointing plate 20, a connecting rod 22 is arranged at one end, close to the butt joint assembly, of the piston 14, the connecting rod 22 penetrates through the connecting hole 21, external threads are formed in the connecting rod 22, two nuts 40 matched with the external threads are arranged on the external threads, and the two nuts 40 are respectively arranged at two ends of the jointing plate 20;

The measuring assembly further comprises a rear cover plate 41 and a front cover plate 42, wherein the rear cover plate 41, the front cover plate 42 and the detection platform 10 can enclose a containing space, and the liquid container 11 and the indicating container 12 are arranged in the containing space; the rear cover plate 41 is connected with the front cover plate 42 through fasteners, a connecting groove formed by two layers of protruding parts 43 is formed in the connecting parts of the rear cover plate 41, the front cover plate 42 and the detection platform 10, and the edge of the detection platform 10 is arranged in the connecting groove; the two-layer protruding part 43 is also provided with clamping components for clamping the two-layer protruding part 43, and the protruding parts are tightly attached to two sides of the detection platform 10 by the clamping components.

As shown in fig. 3 and 4, in some embodiments, the docking assembly is adhered to the side of the pile foundation 30 by the doubler plate 20, and the doubler plate 20 is bent to match the shape of the outer surface of the pile foundation 30 and attached to the outer surface of the pile foundation 30 by glue. The connecting rod 22 can be fixedly connected with the piston 14, two nuts 40 are arranged on the connecting rod 22, the two nuts 40 are respectively arranged on two sides of the attaching plate 20, and the locking nuts 40 can timely drive the piston 14 to move when the pile foundation 30 is settled.

As shown in fig. 3, the rear cover 41 and the front cover 42 are clamped at the edge of the detection platform 10, the rear cover 41, the front cover 42 and the detection platform 10 enclose a containing space, the liquid container 11 and the indication container 12 are arranged in the containing space, the containing space can prevent external impurities and dust from entering the liquid container 11 and the indication container 12, the impurities can prevent the piston 14 from moving, and the detection of the sedimentation distance of the pile foundation 30 is insensitive.

The clamping assembly can be a stud penetrating through the connecting groove, the stud penetrates through one layer of protruding part of the connecting groove and is connected with the other layer of protruding part through threads, the stud penetrates through the detection platform 10, the bolt can be screwed down to pull the protruding part of one layer to be close to the protruding part of the other layer so as to clamp the detection platform 10 between the protruding parts of two sides, and the clamping assembly can also seal gaps between the rear cover plate 41 and the front cover plate 42 and the detection platform 10 to a certain extent.

Further, the detection platform 10 is fixed on the side surface of the pile foundation 30 through at least three ground inserting rods 44, the detection platform 10 is uniformly provided with ground inserting holes 45 with the same number as that of the ground inserting rods 44, the ground inserting rods 44 comprise a proximal end and a distal end, the proximal end of the ground inserting rods 44 is provided with external threads, two nuts 40 matched with the external threads are arranged on the external threads, the distal end of the ground inserting rods 44 is provided with a tip, and the distal end of the ground inserting rods 44 can be inserted into the ground so as to fix the position of the detection platform 10;

The proximal end of the ground rod 44 can pass through the ground insertion hole 45, and two nuts 40 on the ground rod 44 are respectively arranged at two ends of the detection platform 10 to play a role of fixing the ground rod 44 and the detection platform 10.

In some embodiments, as shown in fig. 4, the detection platform 10 is fixed to the ground by means of ground pins 44, and in order to ensure that the detection platform 10 remains level and the position of itself is fixed, the detection platform 10 is fixed to the side of the pile foundation 30 by means of at least three ground pins 44.

The proximal end of the ground rod 44 is a connection end with the detection platform 10, the distal end of the ground rod 44 is a fixed end inserted into the interior of the ground surface, and the distal end of the ground rod 44 may be sharply tapered to facilitate insertion of the ground rod 44 into the interior of the ground surface and a sufficiently deep distance.

The proximal end of the ground rod 44 is provided with external threads, in a specific implementation process, the ground rod 44 can be inserted into the ground surface, then one nut 40 is screwed in, the detection platform 10 is placed on the nut 40 after all the ground rods 44 are screwed in one nut 40, all the ground rods 44 pass through the corresponding ground insertion holes 45, and at this time, the nut 40 can be adjusted to place the detection platform 10 to a preset position and keep the level. And then another nut 40 is screwed in to fix the position of the inspection stage 10.

Preferably, as shown in fig. 6, the contact part between the nut 40 and the detection platform 10 is provided with a conical protruding part 46, the ground jack 45 of the detection platform 10 is provided with a corresponding inclined chamfer 47, the conical protruding part 46 and the inclined chamfer 47 have guiding function, the clamping force of the two nuts 40 can enable the ground jack 44 to be kept at the center position of the ground jack 45, the gap between the ground jack 44 and the detection platform 10 is reduced, and the accuracy of sedimentation distance detection is improved.

The tapered protrusion 46 may be fixed to the nut 40 or a separate spacer may be installed between the nut 40 and the inspection platform 10 as shown in fig. 12.

Further, at least three calibration interfaces 50 are provided on the detection platform 10, the calibration interfaces 50 are used for connecting a calibration device, the calibration device is detachably connected to the detection platform 10, and the calibration device is used for indicating the position of the detection platform 10 and the levelness of the detection platform 10.

In this embodiment, as shown in fig. 3, the calibration interface 50 is used to connect a calibration device, which can determine the installation position of the test platform 10 and the levelness of the test platform 10 when the test platform 10 is installed.

The calibration device may be a GNSS positioning instrument 60, which determines the positions of a plurality of points on the detection platform 10 through GNSS information to calculate the position of the detection platform 10.

Further, the calibration device comprises a calibration platform 52, a ground rod 44 for fixing the calibration platform 52, and a hose 51 for connecting the calibration platform 52 and the detection platform 10;

the calibration platform 52 can be fixed on the ground through the ground inserting rods 44, the ground inserting holes 45 with the same number as the ground inserting rods 44 are formed in the calibration platform 52, the ground inserting rods 44 comprise a proximal end and a distal end, the proximal end of the ground inserting rods 44 is provided with external threads, two nuts 40 matched with the external threads are arranged on the external threads, the distal end of the ground inserting rods 44 is provided with a tip, and the distal end of the ground inserting rods 44 can be inserted into the ground so as to fix the position of the calibration platform 52; at least one calibration interface 50 is provided on the calibration platform 52;

Connectors are arranged at two ends of the hose 51, the hose 51 can be connected with the calibration interface 50 through the connectors, and indication marks 53 are arranged on the connectors;

the two ends of the hose 51 are respectively fixed on the detection platform 10 and the calibration platform 52 through connectors, liquid can be filled in the hose 51, and the liquid level position of the liquid and the indication mark 53 can indicate the relative positions of the detection platform 10 and the calibration platform 52.

As shown in fig. 7, in some embodiments, the calibration platform 52 may be a horizontally placed platform fixed to the ground surface by the ground rod 44, the calibration platform 52 is used as a detection reference, the calibration platform 52 and the detection platform 10 are connected by a hose 51, and the height difference between the detection platform 10 and the calibration platform 52 and the levelness of the detection platform 10 can be determined by the liquid level in the hose 51 after the liquid of interest.

The detection platform 10 and the calibration platform 52 of the present embodiment may be triangular prism shapes with a relatively thin thickness, the calibration interface 50 may be a notch arranged at an edge position, and the hose 51 may be fast clamped with the notch through the connector and fix the relative position of the connector and the calibration interface 50.

The indication mark 53 may be a scale mark on the transparent pipe 13, and determining the positions of the liquid level and the scale mark can determine whether the detection platform 10 and the calibration platform 52 are at the same height, firstly determining the position of the calibration platform 52, then measuring the relative height of the detection platform 10 and the calibration platform 52 through the flexible pipe 51, if the height of the detection platform 10 changes to indicate that the detection platform 10 may subside, and then the measurement data of the detection platform 10 has errors.

Determining the position of the calibration platform 52 may be, as shown in fig. 11, a GNSS positioning instrument 60 coupled to the calibration platform 52 through a calibration interface 50, and determining the position of a plurality of points on the calibration platform 52 by the GNSS positioning instrument 60 to calculate the position and levelness of the calibration platform 52.

Since calibration platform 52 is not loaded, the position of calibration platform 52 is generally not easily changed, and the frequency of calibration platform 52 determined by GNSS positioning instrument 60 may be lower than the frequency of detection platform 10 position determined using calibration platform 52. Alternatively, a plurality of inspection platforms 10 may be disposed within an area, with one inspection platform 10 being disposed such that the plurality of inspection platforms 10 can be positioned and leveled by the calibration platform 52.

Further, be provided with locating component on the connector, locating component includes: a fixed ring 61 provided on the connector, a movable ring 62 which is sleeved on the connector and can slide along the length direction of the connector, and a positioning spring 63 which pushes the movable ring 62 to move in a direction approaching the fixed ring 61; the fixed ring 61 and the movable ring 62 are provided with tapered protrusions 46, and the tapered protrusions 46 are provided on opposite sides of the fixed ring 61 and the movable ring 62; calibration land 52 and/or calibration interface 50 on inspection land 10 are calibration holes, both ends of which are provided with beveled chamfer 47 matching the shape of tapered protrusion 46; the positioning spring 63 can push the fixed ring 61 and the movable ring 62 to clamp the calibration platform 52 and/or the inspection platform 10 from both ends of the calibration hole, and the tapered protrusion 46 contacts the beveled chamfer 47 to keep the connector in a centered position on the calibration interface 50.

In this embodiment, as shown in fig. 8, 9, 10 and 12, the positioning assembly is used to precisely connect the hose 51 with the inspection platform 10/calibration platform 52, so as to reduce measurement errors.

In a specific implementation process, the movable ring 62 is pulled to move away from the fixed ring 61, the positioning spring 63 is compressed, then the connector is clamped into the calibration interface 50, then the positioning spring 63 pushes the movable ring 62 to contact the calibration interface 50, the positioning spring 63 can push the fixed ring 61 and the movable ring 62 to clamp the calibration platform 52 and/or the detection platform 10 from two ends of the calibration hole, and the conical protruding part 46 contacts the inclined chamfer 47 to keep the connector in the center of the calibration interface 50.

The end part of the connector is also provided with a liquid leakage prevention assembly, and the liquid leakage prevention assembly comprises a liquid filling pipe 71 arranged at the end part of the connector, a light ball 73 and a heavy ball 72 arranged in the liquid filling pipe 71, and a limiting piece for limiting the positions of the light ball 73 and the heavy ball 72;

The limiting parts comprise a blocking limiting part 74 which is arranged close to the head part of the connector and a passing limiting part 75 which is far away from the head part of the connector, wherein a light ball 73 and a heavy ball 72 are arranged between the blocking limiting part 74 and the passing limiting part 75, and liquid cannot pass through the blocking limiting part 74 when the light ball 73 is contacted with the blocking limiting part 74; the liquid can pass through the blocking stop 74 when the heavy ball 72 contacts the passable stop 75; the light weight balls 73 can float to the surface of the liquid and the heavy weight balls 72 cannot float to the surface.

The liquid leakage prevention assembly is used for placing the liquid in the hose 51 to flow out during the process of moving the hose 51, the liquid filling pipe 71 is a hard and hollow pipeline 13, the density of the light balls 73 is smaller than that of the liquid filled in the hose 51, the light balls can float on the surface of the liquid, the density of the heavy balls 72 is larger than that of the liquid filled in the hose 51, and the light balls cannot float on the surface.

If the other end of the hose 51 is moved to a higher height with the connector head up, the liquid in the hose 51 may be caused to flow out. At this time, the liquid level inside the connector rises, the light ball 73 floats with the liquid level, the light ball 73 contacts the blocking stopper 74, and the light ball 73 contacts the blocking stopper 74, preventing the liquid from flowing out.

As shown in fig. 8 and 9, the stopper 74 has a circular ring shape, and completely fills the gap between the light bulb 73 and the liquid filling pipe 71.

With the connector head down, liquid within the hose 51 may flow out through the connector. At this time, the heavy ball 72 approaches the end of the connector by gravity, the heavy ball 72 pushes the light ball 73 to contact the stopper 74, and the gap between the heavy ball 72 and the liquid filling pipe 71 through which the liquid can flow is not completely blocked by the stopper 75.

If it is desired to fill the hose 51 with liquid, liquid can be filled directly through the liquid filling tube 71 when the connector head is up. If it is desired to release the liquid from the hose 51, a rod-like member may be used to push the light weight ball 73 and the heavy weight ball 72 upward as the connector head is lowered, at which point the liquid may flow out through the liquid filling tube 71.

Another object of the present invention is to provide a calibration method for a detection platform 10 of a pile foundation 30 settlement detection system for engineering detection, where the detection platform 10 is provided with a calibration interfaces 50, a is not less than 3; the calibration platform 52 is also provided with a calibration interfaces 50;

the method comprises the following steps:

determining the position and levelness of the calibration platform 52, so that the calibration platform 52 maintains a horizontal position;

the calibration interface 50 of the detection platform 10 and the calibration platform 52 is connected through A hoses 51, any calibration interface 50 of the detection platform 10 and the calibration platform 52 is connected with a hose 51, and liquid is filled in the A hoses 51;

the liquid in the hose 51 is adjusted one by one, so that the liquid level in the connector of the calibration platform 52 corresponds to the indication mark 53 of the connector of the calibration platform 52;

Determining whether the liquid level inside the detection platform 10 connector corresponds to the indicator 53 of the detection platform 10 connector;

If the liquid level inside the connector of the detection platform 10 corresponds to the indicator 53 of the connector of the detection platform 10, it indicates that the detection platform 10 is level and is in height with the calibration platform 52;

If the liquid level inside the connector of the detection platform 10 does not correspond to the indicator 53 of the connector of the detection platform 10, it indicates that the detection platform 10 is not level or not level with the calibration platform 52.

In this embodiment, the position and levelness of the detection platform 10 are determined by the calibration platform 52 by simultaneously connecting the detection platform 10 and the calibration platform 52 through a plurality of hoses 51, if the liquid level of each hose 51 is within an acceptable range, it indicates that the position of the detection platform 10 is reliable, and the pile foundation 30 sedimentation distance measurement data of the detection platform 10 is reliable.

After the hose 51 is connected in place, that is, one end of the hose 51 is connected to the calibration platform 52, and the other end is connected to the detection platform 10, the hose 51 is filled with liquid, so that the liquid level inside the connector of the calibration platform 52 reaches a position corresponding to the indicator 53. At this point the fluid level inside the connector of the test platform 10 is observed, if in an acceptable position, indicating that this calibration interface 50 monitors data as acceptable.

As shown in fig. 8, the indication mark 53 may be one scale line or a section formed by a plurality of scale lines. The acceptable position may be that the liquid level completely coincides with the graduation marks, or may be in the interval between two graduation marks.

Another objective of the present invention is to provide a calibration method for a detection platform 10 of a pile foundation 30 settlement detection system for engineering detection, where the detection platform 10 is provided with a calibration interfaces 50, a is not less than 3, and the a calibration interfaces 50 are a calibration interface A1 and a calibration interface A2 … … calibration interface AN respectively; the calibration platform 52 is provided with 1 calibration interface 50;

the method comprises the following steps:

Step S1: determining the position and levelness of the calibration platform 52, so that the calibration platform 52 maintains a horizontal position;

Step S2: the hose 51 is connected with a calibration interface A1 of the detection platform 10 and a detection interface of the calibration platform 52, and liquid is filled in the hose 51;

Step S3-1: adjusting the liquid in the hose 51 so that the liquid level inside the connector of the calibration platform 52 corresponds to the indicator 53 of the connector of the calibration platform 52;

Step S3-2: determining whether the liquid level inside the detection platform 10 connector corresponds to the indicator 53 of the detection platform 10 connector;

If the liquid level inside the connector of the detection platform 10 corresponds to the indication mark 53 of the connector of the detection platform 10, turning to step S4;

If the liquid level inside the connector of the detection platform 10 does not correspond to the indication mark 53 of the connector of the detection platform 10, the detection platform 10 is not level or is inconsistent with the height of the calibration platform 52;

Step S4: replacing the calibration interface 50 of the detection platform 10 and connecting the hose 51, and repeating the step S3-1 and the step S3-2 until the calibration interface A1 and the calibration interface A2 … … calibrate the interface AN at least once;

If the liquid level inside the connector of the detection platform 10 is calibrated each time, the liquid level inside the connector of the detection platform 10 corresponds to the indicator 53 of the connector of the detection platform 10, which indicates that the detection platform 10 is level and is in accordance with the height of the calibration platform 52.

In this embodiment, a manner is proposed in which one calibration interface 50 connected to a calibration platform 52 through a hose 51 is sequentially connected to a plurality of interfaces of the inspection platform 10 to determine the position and levelness of the inspection platform 10.

As shown in fig. 7, the detection platform 10 of the present embodiment is provided with 3 calibration interfaces, which are a calibration interface A1, a calibration interface A2, and a calibration interface A3.

In step S4, the hose 51 is connected to the calibration interface 50 of the test platform 10, and steps S3-1 and S3-2 are repeated until the calibration interfaces A1, A2, and A3 are all calibrated at least once.

The foregoing description of the disclosed embodiments of the invention is illustrative, and not exhaustive, of the scope of the invention and is not limited to the embodiments described above. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the spirit and scope of the invention. That is, various changes and modifications in form and detail may be made by one skilled in the art, which are deemed to fall within the scope of the present invention. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. The pile foundation settlement detection system for engineering detection is used for detecting the settlement size of a pile foundation (30) in a normal use state; the pile foundation settlement detection system for engineering detection is characterized by comprising: the device comprises a butt joint assembly used for being connected with a pile foundation (30), a detection platform (10) capable of being installed on one side of the pile foundation (30), and a measurement assembly arranged on the detection platform (10) and used for measuring the sedimentation size of the pile foundation (30), wherein the measurement assembly is connected with the butt joint assembly;

The butt joint assembly is connected to the outer surface of the pile foundation (30); the measuring assembly comprises a liquid container (11) and an indicating container (12) which are arranged on the detecting platform (10), wherein the liquid container (11) and the indicating container (12) are columnar and hollow in the interior, the liquid container (11) and the indicating container (12) are communicated through a pipeline (13), a piston (14) is arranged in the liquid container (11), and the piston (14) is connected with the abutting assembly;

The measuring assembly further comprises a level sensor for detecting a level of liquid inside the indicating container (12); indicating that the cross-sectional area of the internal space of the container (12) is smaller than the cross-sectional area of the internal space of the liquid container (11), the liquid container (11) being filled with liquid; when the pile foundation (30) is settled, the butt joint assembly pushes the piston (14) to move, so that the liquid height inside the indication container (12) is changed.

2. The pile foundation settlement detection system for engineering detection according to claim 1, wherein: the inside of the indication container (12) is provided with a buoyancy unit which can float on the top surface of liquid, the liquid level sensor is a distance sensor (15) arranged at the top of the indication container (12), and the distance sensor (15) is used for measuring the distance of the buoyancy unit;

The side face of the indication container (12) is provided with a gas output channel (16), the end part of the gas output channel (16) is provided with a channel bracket (17), the inner wall of the gas output channel (16) is provided with a conical surface (161), a blocking sphere (162) is placed in the conical surface (161), and a blocking spring (18) is arranged between the blocking sphere (162) and the channel bracket (17);

The blocking spring (18) can push the blocking ball (162) to contact the conical surface (161) so as to block the gas output channel (16), when the liquid in the indicating container (12) rises, the air pressure in the indicating container (12) increases, the air pressure pushes the blocking ball (162) and compresses the blocking spring (18), and after the gas is discharged through the gas output channel (16), the spring pushes the blocking ball (162) to contact the conical surface (161), so that sundries are prevented from entering the indicating container (12).

3. The pile foundation settlement detection system for engineering detection according to claim 1, wherein: the bottom of liquid container (11) and instruction container (12) is provided with spliced pole (19) that have the external screw thread, the connecting portion of pipeline (13) and liquid container (11) and instruction container (12) is provided with go-between (191) that have the internal screw thread, and the both ends of pipeline (13) are provided with flange ring (131) that can block in go-between (191), and go-between (191) and spliced pole (19) pass through threaded connection, and go-between (191) can promote flange ring (131) contact spliced pole (19), and the both ends of pipeline (13) are respectively with the bottom zonulae occludens of liquid container (11) and instruction container (12).

4. The pile foundation settlement detection system for engineering detection according to claim 1, wherein: the butt joint assembly comprises a bonding plate (20) bonded on the surface of the pile foundation (30), the proximal end of the bonding plate (20) is connected with the surface of the pile foundation (30), a connecting hole (21) is formed in the distal end of the bonding plate (20), a connecting rod (22) is arranged at one end, close to the butt joint assembly, of the piston (14), the connecting rod (22) penetrates through the connecting hole (21), external threads are formed in the connecting rod (22), two nuts (40) matched with the external threads are arranged on the external threads, and the two nuts (40) are respectively arranged at two ends of the bonding plate (20);

The measuring assembly further comprises a rear cover plate (41) and a front cover plate (42), wherein the rear cover plate (41), the front cover plate (42) and the detection platform (10) can enclose a containing space, and the liquid container (11) and the indicating container (12) are arranged in the containing space; the rear cover plate (41) is connected with the front cover plate (42) through a fastener, a connecting groove formed by two layers of protruding parts (43) is formed in the connecting part of the rear cover plate (41), the front cover plate (42) and the detection platform (10), and the edge of the detection platform (10) is arranged in the connecting groove; the two layers of protruding parts (43) are also provided with clamping components for clamping the two layers of protruding parts (43), and the clamping components enable the protruding parts to be tightly attached to two sides of the detection platform (10).

5. The pile foundation settlement detection system for engineering detection according to claim 1, wherein: the detection platform (10) is fixed on the side face of the pile foundation (30) through at least three ground inserting rods (44), ground inserting holes (45) which are consistent with the ground inserting rods (44) in number are uniformly formed in the detection platform (10), the ground inserting rods (44) comprise a proximal end and a distal end, external threads are formed in the proximal end of the ground inserting rods (44), two nuts (40) matched with the external threads are arranged on the external threads, tips are arranged at the distal ends of the ground inserting rods (44), and the distal ends of the ground inserting rods (44) can be inserted into the ground surface so as to fix the position of the detection platform (10);

The proximal end of the ground inserting rod (44) can penetrate through the ground inserting hole (45), and two nuts (40) on the ground inserting rod (44) are respectively arranged at two ends of the detection platform (10) to play a role of fixedly inserting the rod (44) and the detection platform (10).

6. The pile foundation settlement detection system for engineering detection according to claim 1, wherein: the detection platform (10) is provided with at least three calibration interfaces (50), the calibration interfaces (50) are used for being connected with a calibration device, the calibration device is detachably connected to the detection platform (10), and the calibration device is used for indicating the position of the detection platform (10) and the levelness of the detection platform (10).

7. The pile foundation settlement detection system for engineering detection of claim 6, wherein: the calibration device comprises a calibration platform (52), a ground rod (44) for fixing the calibration platform (52), and a hose (51) for connecting the calibration platform (52) and the detection platform (10);

The ground jack (45) which is consistent with the ground jack (44) in number is arranged on the calibration platform (52), the ground jack (44) comprises a proximal end and a distal end, the proximal end of the ground jack (44) is provided with external threads, two nuts (40) matched with the external threads are arranged on the external threads, the distal end of the ground jack (44) is provided with a tip, and the distal end of the ground jack (44) can be inserted into the ground surface so as to fix the position of the calibration platform (52); at least one calibration interface (50) is arranged on the calibration platform (52);

connectors are arranged at two ends of the hose (51), the hose (51) can be connected with the calibration interface (50) through the connectors, and indication marks (53) are arranged on the connectors;

Two ends of the hose (51) are respectively fixed on the detection platform (10) and the calibration platform (52) through connectors, liquid can be filled in the hose (51), and the liquid level position of the liquid and the indication mark (53) can indicate the relative position of the detection platform (10) and the calibration platform (52).

8. The pile foundation settlement detection system for engineering detection of claim 7, wherein: the connector is provided with a positioning assembly, and the positioning assembly comprises: a fixed ring (61) arranged on the connector, a movable ring (62) sleeved on the connector and capable of sliding along the length direction of the connector, and a positioning spring (63) pushing the movable ring (62) to move towards the direction approaching the fixed ring (61); the fixed ring (61) and the movable ring (62) are provided with conical protruding parts (46), and the conical protruding parts (46) are arranged on the opposite side surfaces of the fixed ring (61) and the movable ring (62); the calibration platform (52) and/or the calibration interface (50) on the reference platform are calibration holes, and both ends of the calibration holes are provided with inclined chamfers (47) matched with the conical protruding parts (46) in shape; the positioning spring (63) can push the fixed ring (61) and the movable ring (62) to clamp the calibration platform (52) and/or the reference platform from the two ends of the calibration hole, and the conical protruding part (46) is contacted with the inclined chamfer (47) to keep the connector in the center of the calibration interface (50);

the end part of the connector is also provided with a liquid leakage prevention assembly, and the liquid leakage prevention assembly comprises a liquid filling pipe (71) arranged at the end part of the connector, a light ball (73) and a heavy ball (72) arranged in the liquid filling pipe (71), and a limiting piece for limiting the positions of the light ball (73) and the heavy ball (72);

The limiting parts comprise a blocking limiting part (74) which is arranged close to the head part of the connector and a passing limiting part (75) which is far away from the head part of the connector, wherein a light ball (73) and a heavy ball (72) are arranged between the blocking limiting part (74) and the passing limiting part (75), and liquid cannot pass through the blocking limiting part (74) when the light ball (73) is in contact with the blocking limiting part (74); the liquid can pass through the blocking limiting piece (74) when the heavy ball (72) is contacted with the passing limiting piece (75); the light weight balls (73) are capable of floating on the surface of the liquid and the heavy weight balls (72) are not capable of floating on the surface.

9. A test platform calibration method for a pile foundation settlement test system for engineering detection according to any one of claims 1-8, characterized in that the test platform (10) is provided with a calibration interfaces (50), a being not less than 3; the calibration platform (52) is also provided with A calibration interfaces (50);

the method comprises the following steps:

Determining the position and levelness of the calibration platform (52) so that the calibration platform (52) maintains a horizontal position;

the device comprises a detection platform (10) and a calibration platform (52), wherein the detection platform (10) and the calibration platform (52) are connected through A hoses (51), any calibration interface (50) of the detection platform (10) and the calibration platform (52) is connected with the hoses (51), and liquid is filled in the A hoses (51);

The liquid in the hose (51) is adjusted one by one, so that the liquid level in the connector of the calibration platform (52) corresponds to the indication mark (53) of the connector of the calibration platform (52);

determining whether a liquid level inside the connector of the detection platform (10) corresponds to an indication mark (53) of the connector of the detection platform (10);

If the liquid level inside the connector of the detection platform (10) corresponds to the indication mark (53) of the connector of the detection platform (10), the liquid level of the detection platform (10) is represented to be horizontal and is consistent with the height of the calibration platform (52);

If the liquid level inside the connector of the detection platform (10) does not correspond to the indication mark (53) of the connector of the detection platform (10), the detection platform (10) is not level or is inconsistent with the height of the calibration platform (52).

10. A method for calibrating a detection platform of a pile foundation settlement detection system for engineering detection according to any one of claims 1 to 8, wherein the detection platform (10) is provided with a calibration interfaces (50), a is not less than 3, and the a calibration interfaces (50) are a calibration interface A1 and a calibration interface A2 … … calibration interface AN respectively; the calibration platform (52) is provided with 1 calibration interface (50);

the method comprises the following steps:

Step S1: determining the position and levelness of the calibration platform (52) so that the calibration platform (52) maintains a horizontal position;

Step S2: the hose (51) is connected with a calibration interface A1 of the detection platform (10) and a detection interface of the calibration platform (52), and liquid is filled in the hose (51);

step S3-1: adjusting the liquid in the hose (51) to enable the liquid level inside the connector of the calibration platform (52) to correspond to the indication mark (53) of the connector of the calibration platform (52);

step S3-2: determining whether a liquid level inside the connector of the detection platform (10) corresponds to an indication mark (53) of the connector of the detection platform (10);

If the liquid level inside the connector of the detection platform (10) corresponds to the indication mark (53) of the connector of the detection platform (10), the step S4 is performed;

If the liquid level inside the connector of the detection platform (10) does not correspond to the indication mark (53) of the connector of the detection platform (10), the detection platform (10) is not level or is inconsistent with the height of the calibration platform (52);

Step S4: replacing a calibration interface (50) of the detection platform (10) and connecting a hose (51), and repeating the step S3-1 and the step S3-2 until the calibration interface A1 and the calibration interface A2 … … calibrate the interface AN at least once;

if the liquid level inside the connector of the detection platform (10) is calibrated each time, the liquid level inside the connector of the detection platform (10) and the indication mark (53) of the connector of the detection platform (10) are respectively indicated to be horizontal and are consistent with the height of the calibration platform (52).