Fixed coring device for determining integrity of pile body of soft soil foundation

Abstract

The utility model provides a fixed coring device for determining the integrity of a pile body of a soft soil foundation, which belongs to the technical field of highway engineering and structurally comprises a rack, a chassis and a drill pipe machine, the rack is fixedly connected onto the chassis, a power mechanism is arranged on the chassis, and the power mechanism outputs power to be connected with a transfer case. One power output of the transfer case is connected with the transmission drill pipe machine, and the other power output is connected with the crawler machine; hydraulic lifting machines are arranged at the four corners of a horizontally-arranged rectangular rack respectively, and hydraulic supporting feet are arranged at the bottom of each hydraulic lifting machine. The corner portions of the frame are fixedly connected and arranged at the top ends of the four hydraulic lifting machines in a sitting mode. And verticality early warning devices are respectively arranged at the tops of the hydraulic lifting machines. The problem that soft soil foundation pile foundation core drilling sampling is prone to deviating is solved. The deviation angle in the core drilling and sampling process can be monitored in real time, an operator can conduct real-time adjustment, then the core drilling and sampling success rate is increased, the foundation reinforcement quality is improved, and the road engineering quality safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of highway engineering, in particular to a fixed coring device for determining the integrity of a pile body of a soft soil foundation. Background Art

[0002] Due to different terrains, the conditions for foundation soil treatment in different places are also different, which makes the foundation treatment problem very complicated. Soft soil foundation treatment is the key and difficult point in new road projects. If the foundation is not treated properly, it is very easy to cause disasters such as uneven settlement in the later stage. The CFG pile and cement concrete mixing pile composite foundation treatment method has the advantages of wide applicability, low cost, no pollution, and little impact on the surrounding underground structures. It has become an effective foundation treatment method and is widely used in soft soil foundation treatment in various engineering fields.

[0003] CFG pile method and cement concrete mixing pile method are both composite foundation treatment methods. Through drilling and pouring mixing piles, part of the soil is replaced to form a reinforcement (pile). The reinforcement and the surrounding soil share the load. In the process of pile formation, complex geological conditions (sand layer, underground river, high groundwater level, etc.) are encountered, which easily lead to broken piles and necking. In addition, the homogeneity and fluidity of the pile body casting materials are poor during the construction process, resulting in incomplete piles. In order to ensure the quality of the project, it is necessary to conduct pile body integrity testing on CFG piles and cement concrete mixing piles. The core drilling method is to use a drilling machine to extract the core sample of the pile body, which is the most direct way to test the pile length, pile body quality, pile body concrete strength, sediment thickness, and bearing layer properties. This is an intuitive method that all other methods cannot have, and is widely used in pile body integrity testing in road engineering.

[0004] The core drilling method is the most intuitive and recognized method for detecting pile integrity, but it requires high vertical accuracy of the core. For cement mixing piles, the pile diameter is generally small (usually around 500 mm), and there is often floating slurry at the pile head. If the pile head is not completely broken, it is difficult to determine the pile center, resulting in deviation during the coring process, and the pile body integrity cannot be determined. Therefore, the study of a fixed coring device for determining the pile body integrity of soft soil foundation is conducive to improving the detection efficiency of the pile integrity, thereby ensuring the construction quality of road projects, which has important social value and economic significance. Summary of the invention

[0005] The technical task of the utility model is to solve the deficiencies of the prior art and provide a fixed coring device for determining the integrity of a pile body in a soft soil foundation.

[0006] The technical solution of the utility model is implemented in the following manner: the utility model is a fixed coring device for determining the integrity of a pile body on a soft soil foundation, and its structure includes a frame, a chassis and a drill rod machine.

[0007] The frame is fixedly connected to the chassis, and a power mechanism is arranged on the chassis. The power output of the power mechanism is connected to the transfer case. One power output of the transfer case is connected to the driving drill rod machine, which is arranged at the rear of the chassis and is equipped with a vertically arranged drill rod; another power output of the transfer case is connected to the crawler machine, which is arranged at the bottom of the chassis;

[0008] Hydraulic lifts are respectively arranged at the four corners of the horizontally arranged rectangular frame, and hydraulic feet are respectively arranged at the bottom of each hydraulic lift, and the hydraulic feet are arranged downward;

[0009] A frame is arranged above the rack, and the corners of the frame are fixedly connected and seated on the top of four hydraulic lifts;

[0010] Flip hinge seats are fixedly arranged at the two left and right corners of the frame at the rear of the frame;

[0011] Each flip hinge seat is provided with a horizontal seating platform portion and a flip hinge shaft pair, the flip hinge shaft pair is arranged at the front side of the horizontal seating platform portion, the flip hinge shaft pairs located on the left and right sides are coaxially arranged at intervals, a support rod is hinged on each flip hinge shaft pair, and the left and right support rods intersect at the top to form a suspension support frame;

[0012] The suspension support frame has a turning stroke from a vertical state in which the bottom end of the vertical setting is seated on a horizontal seating platform to a forward turning state in which the receiving seat at the front end of the frame is received by the turning hinge seat;

[0013] A verticality warning device is respectively arranged on the top of the hydraulic lift.

[0014] The verticality warning device is composed of an ultrasonic distance measuring sensor, a wire and a controller. The ultrasonic distance measuring sensor adopts a 2-meter measuring distance ultrasonic distance measuring sensor. There are four ultrasonic distance measuring sensors, which are fixedly connected to the top of the hydraulic lift. Each ultrasonic distance measuring sensor measures the relative distance to the drill pipe. Each ultrasonic distance measuring sensor is connected to the controller through a wire. The controller is installed on the frame and is equipped with a connection alarm.

[0015] The power mechanism adopts an internal combustion engine.

[0016] The downward stroke of the hydraulic support foot is greater than the height of the crawler track of the crawler machine.

[0017] A drill rod centralizer is fixedly arranged on the frame. The drill rod of the drill rod machine passes through the drill rod centralizer on the frame and extends downward. A drill bit is arranged at the bottom end of the drill rod.

[0018] Sleepers are respectively arranged at the bottom ends of the hydraulic legs.

[0019] A pile center determination device is also arranged between the drill rod machine and the drill rod.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The utility model provides a fixed coring device for determining the integrity of a pile body in a soft soil foundation.

[0022] The main purpose of the utility model is to solve the problem of easy deviation of core sampling in soft soil pile foundation. The utility model can monitor the deviation angle in real time during the core sampling process, and the operator can make real-time adjustments to improve the success rate of core sampling, which is conducive to improving the quality of foundation reinforcement and ensuring the quality and safety of road engineering.

[0023] The utility model has low speed and high torque, and can be used for drilling rig sampling and pile hole construction. High speed, small-caliber diamond drill bit, can be used for drilling rig pile inspection and other construction. The friction cone and planetary wheel combined lifter has a simple and stable structure and good impact resistance; oil pressure feeding, easy operation, and drilling efficiency is improved to a certain extent.

[0024] The utility model provides a fixed coring device for determining the integrity of a pile body on a soft soil foundation, which has the advantages of reasonable design, simple structure, safety and reliability, convenient use and easy maintenance, and has a good value for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Attached Figure 1 It is a structural schematic diagram of the utility model;

[0026] Attached Figure 2 It is a schematic diagram of the working state of the pile center determination device of the utility model;

[0027] Attached Figure 3 It is a schematic diagram of the configuration structure of the verticality early warning device of the utility model.

[0028] The symbols in the accompanying drawings represent:

[0029] 1. Frame, 2. Chassis, 3. Drilling machine,

[0030] 4. Power mechanism, 5. Transfer case,

[0031] 6. Drilling machine transmission pair, 7. Drilling rod, 8. Crawler machine,

[0032] 9. Hydraulic lift, 10. Hydraulic legs,

[0033] 11. Frame, 12. Flip hinge seat, 13. Horizontal seating platform, 14. Flip hinge shaft pair,

[0034] 15. Support rod, 16. Suspension support frame, 17. Flip stroke,

[0035] 18. Verticality warning device,

[0036] 19. Ultrasonic distance sensor, 20. Wire, 21. Controller, 22. Alarm,

[0037] 23. Drill rod centralizer, 24. Drill bit, 25. Sleeper, 26. Pile center determination device. DETAILED DESCRIPTION

[0038] The following is a detailed description of a fixed coring device for determining the integrity of a pile body in a soft soil foundation according to the utility model in conjunction with the accompanying drawings.

[0039] As shown in the attached drawings, the utility model is a fixed coring device for determining the integrity of a pile body in a soft soil foundation, and its structure includes a frame, a chassis and a drilling machine.

[0040] The frame is fixedly connected to the chassis, and a power mechanism is arranged on the chassis. The power output of the power mechanism is connected to the transfer case. One power output of the transfer case is connected to the driving drill rod machine, which is arranged at the rear of the chassis and is equipped with a vertically arranged drill rod; another power output of the transfer case is connected to the crawler machine, which is arranged at the bottom of the chassis;

[0041] Hydraulic lifts are respectively arranged at the four corners of the horizontally arranged rectangular frame, and hydraulic feet are respectively arranged at the bottom of each hydraulic lift, and the hydraulic feet are arranged downward;

[0042] A frame is arranged above the rack, and the corners of the frame are fixedly connected and seated on the top of four hydraulic lifts;

[0043] Flip hinge seats are fixedly arranged at the two left and right corners of the frame at the rear of the frame;

[0044] Each flip hinge seat is provided with a horizontal seating platform portion and a flip hinge shaft pair, the flip hinge shaft pair is arranged at the front side of the horizontal seating platform portion, the flip hinge shaft pairs located on the left and right sides are coaxially arranged at intervals, a support rod is hinged on each flip hinge shaft pair, and the left and right support rods intersect at the top to form a suspension support frame;

[0045] The suspension support frame has a turning stroke from a vertical state in which the bottom end of the vertical setting is seated on a horizontal seating platform to a forward turning state in which the receiving seat at the front end of the frame is received by the turning hinge seat;

[0046] A verticality warning device is respectively arranged on the top of the hydraulic lift.

[0047] The verticality warning device is composed of an ultrasonic distance measuring sensor, a wire and a controller. The ultrasonic distance measuring sensor adopts a 2-meter measuring distance ultrasonic distance measuring sensor. There are four ultrasonic distance measuring sensors, which are fixedly connected to the top of the hydraulic lift. Each ultrasonic distance measuring sensor measures the relative distance to the drill pipe. Each ultrasonic distance measuring sensor is connected to the controller through a wire. The controller is installed on the frame and is equipped with a connection alarm.

[0048] The power mechanism adopts an internal combustion engine.

[0049] The downward stroke of the hydraulic support foot is greater than the height of the crawler track of the crawler machine.

[0050] A drill rod centralizer is fixedly arranged on the frame. The drill rod of the drill rod machine passes through the drill rod centralizer on the frame and extends downward. A drill bit is arranged at the bottom end of the drill rod.

[0051] Sleepers are respectively arranged at the bottom ends of the hydraulic legs.

[0052] A pile center determination device is also arranged between the drill rod machine and the drill rod.

[0053] The functions of the components of the fixed coring device for determining the integrity of the pile body of a soft soil foundation of the utility model are as follows:

[0054] The drill bit is used to dig downwards and drill pile foundation samples;

[0055] The drill rod is an extended connecting rod of the drill bit, which is used for the drill bit to drill the pile foundation structure at a deeper position;

[0056] The drill rod fixing device is used to fix the drill rod to ensure the success rate of coring;

[0057] The drill rod holder is used to temporarily place the drill rod;

[0058] The sleepers provide a platform for the legs to be erected, and together they ensure the stability of the coring device;

[0059] The bracket is used to set up the drill pipe and play a supporting role;

[0060] The engine provides power for the movement of the device and the coring work;

[0061] The operating lever can control the movement of the device and the sampling and excavation of the drill bit (drill rod); the fuselage provides an operating platform and connects other components;

[0062] The crawler is responsible for the movement of the coring device;

[0063] The ultrasonic distance measuring sensor, wire and controller together form a verticality warning system. When the device tilt angle exceeds the control value, the control system will alarm and the operator will make adjustments in real time.

[0064] The pile center determination device is used to determine the center of the pile foundation before core drilling.

[0065] The drill bit is a steel drill bit with different diameter models. In the initial sampling stage (within 2m of the pile head), a larger diameter drill bit can be used to take core samples at the pile head, and then a smaller diameter drill bit can be used for sampling.

[0066] The drill rod is made of a spliced ​​threaded steel pipe. The drill rod is connected to the drill bit and has various lengths such as 2m, 3m, 5m, etc. During the core drilling process, the drill rod can be spliced, increased and replaced according to the increase in sampling depth.

[0067] The device is equipped with two drill rod fixing devices, which are fixed on the fuselage and the bracket respectively. Compared with a single fixing device, it is more conducive to the fixation of the drill rod (two points determine a straight line), which is beneficial to ensuring the verticality of the drill rod and improving the success rate of sampling.

[0068] The fixed frame of the drill rod machine adopts a steel bracket, which is fixed on the front side of the machine body. The drill bit is positioned before excavation, the drill rod is not long enough for splicing, the drill rod is lifted for disassembly and the core sample in the drill bit is taken out, and the drill rod can be fixed on the device.

[0069] The hydraulic feet / legs are retractable steel pipes. Before coring, open the four feet / legs, adjust the lengths of the four legs separately through the operating levers, and fix them on the sleepers to ensure the stability of the device.

[0070] The suspension support frame adopts a foldable bracket. When the device is moved, the bracket can be laid down and placed on the surface of the fuselage. When performing core drilling operations, it can be erected and fixed to the fuselage to play a supporting role.

[0071] The crawler is used as the mobile device, which can adapt to various complex terrains in soft soil foundations and facilitate the movement of the coring device.

[0072] Verticality early warning system, the system consists of ultrasonic distance measuring sensor, wire and controller, among which the ultrasonic distance measuring sensor adopts UB2000 series of 2-meter measuring distance ultrasonic distance measuring sensor, which is fixed on the outrigger and connected to the controller through wire. Before the core drilling sampling officially starts, the controller is used to measure the distance (the distance between the distance measuring sensors), that is, S0. The distance monitored in real time during the core drilling process is S1. Due to the high verticality requirements during the core drilling process, the offset shall not exceed 0.5%, and the offset angle β is very small. It can be approximately considered that h=S1-S0, and then the height difference of the outrigger is calculated, and finally the offset of the device is obtained. When the offset exceeds the control value, the controller alarms and the operator makes real-time adjustments to ensure the success rate of core drilling sampling.

[0073] The pile core determination device is a retractable disc with the center of the disc marked. Its diameter can be adjusted according to different working conditions. The device can be directly put on the pile head to determine the position of the pile core.

[0074] The specific use process of this device is as follows: drive the coring device to the designated pile foundation position, place sleepers, hydraulically start and extend the hydraulic legs, lift the entire machine to a horizontal level, fix the coring device, erect the suspension support frame, use the pile center determination device to determine the center of the pile foundation, and before starting core drilling, turn on the controller, measure the initial value with the ultrasonic ranging sensor, and start core drilling sampling. During the sampling process, if the controller alarms, the drill rod angle is corrected in real time to ensure the sampling success rate.

[0075] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fixed coring device for determining the integrity of piles in soft soil foundations, characterized in that Including frame, chassis and drilling machine, The frame is fixedly connected to the chassis, and a power mechanism is arranged on the chassis. The power output of the power mechanism is connected to the transfer case. One power output of the transfer case is connected to the driving drill rod machine, which is arranged at the rear of the chassis and is equipped with a vertically arranged drill rod; another power output of the transfer case is connected to the crawler machine, which is arranged at the bottom of the chassis; Hydraulic lifts are respectively arranged at the four corners of the horizontally arranged rectangular frame, and hydraulic feet are respectively arranged at the bottom of each hydraulic lift, and the hydraulic feet are arranged downward; A frame is arranged above the rack, and the corners of the frame are fixedly connected and seated on the top of four hydraulic lifts; Flip hinge seats are fixedly arranged at the two left and right corners of the frame at the rear of the frame; Each flip hinge seat is provided with a horizontal seating platform portion and a flip hinge shaft pair, the flip hinge shaft pair is arranged at the front side of the horizontal seating platform portion, the flip hinge shaft pairs located on the left and right sides are coaxially arranged at intervals, a support rod is hinged on each flip hinge shaft pair, and the left and right support rods intersect at the top to form a suspension support frame; The suspension support frame has a turning stroke from a vertical state in which the bottom end of the vertical setting is seated on a horizontal seating platform to a forward turning state in which the receiving seat at the front end of the frame is received by the turning hinge seat; A verticality warning device is respectively arranged on the top of the hydraulic lift.

2. A fixed coring device for determining the integrity of a pile body in a soft soil foundation according to claim 1, characterized in that: The verticality warning device is composed of an ultrasonic distance measuring sensor, a wire and a controller. The ultrasonic distance measuring sensor adopts a 2-meter measuring distance ultrasonic distance measuring sensor. There are four ultrasonic distance measuring sensors, which are fixedly connected to the top of the hydraulic lift. Each ultrasonic distance measuring sensor measures the relative distance to the drill pipe. Each ultrasonic distance measuring sensor is connected to the controller through a wire. The controller is installed on the frame and is equipped with a connection alarm.

3. A fixed coring device for determining the integrity of a pile body in a soft soil foundation according to claim 1, characterized in that: The power mechanism adopts an internal combustion engine.

4. A fixed coring device for determining the integrity of a pile body in a soft soil foundation according to claim 1, characterized in that: The downward stroke of the hydraulic support foot is greater than the height of the crawler track of the crawler machine.

5. A fixed coring device for determining the integrity of a pile body in a soft soil foundation according to claim 1, characterized in that: A drill rod centralizer is fixedly arranged on the frame. The drill rod of the drill rod machine passes through the drill rod centralizer on the frame and extends downward. A drill bit is arranged at the bottom end of the drill rod.

6. A fixed coring device for determining the integrity of a pile body in soft soil foundation according to claim 1, characterized in that: Sleepers are respectively arranged at the bottom ends of the hydraulic legs.

7. A fixed coring device for determining the integrity of a pile body in a soft soil foundation according to claim 1, characterized in that: A pile center determination device is also arranged between the drill rod machine and the drill rod.

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