Device for detecting uniformity of flow-state solidified soil in construction of fully-prefabricated diaphragm wall

Abstract

The utility model discloses a device for detecting the uniformity of flow-state solidified soil in the construction of a fully-prefabricated diaphragm wall, which relates to the technical field of underground engineering and comprises a working table plate, a detection rod, a driving mechanism and a control and data processing system, and the working table plate is provided with a detection rod action port; the detection rod vertically penetrates through the detection rod action port, the bottom end of the detection rod is provided with a heating type optical fiber detection head, and a control circuit of the heating type optical fiber detection head is arranged in the hollow cavity of the detection rod; the driving mechanism is arranged on the top surface of the working table plate, and a driving part of the driving mechanism is matched with the detection rod and can drive the detection rod to do up-and-down lifting motion; and the control and data processing system is electrically connected with a control circuit of the heating type optical fiber detection head. According to the utility model, the detection rod, the driving mechanism and the control and data processing system are integrated, so that the uniformity of the cement flow-state solidified soil at different depths can be monitored in real time, and the problem that real-time detection cannot be carried out in a traditional method is solved.

Description

Device for detecting the uniformity of fluidized solidified soil during the construction of fully prefabricated diaphragm walls. Technical Field

[0001] This utility model relates to the field of underground engineering technology, and more specifically to a device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall. Background Technology

[0002] Diaphragm wall structures occupy a central position in the field of civil engineering, and their construction quality directly determines the overall stability and safety of the project. With urban development, diaphragm walls are increasingly widely used in deep foundation pit projects. However, traditional cast-in-place diaphragm wall construction methods have many defects, such as exposed reinforcement, leakage, shrinkage cavities, and wall cracking. In contrast, fully precast diaphragm walls are a new type of retaining structure that is prefabricated in a factory and then hoisted, assembled, and lowered on-site. They not only fully inherit the advantages of traditional cast-in-place diaphragm walls but also solve engineering problems such as irregular mud inclusions and leakage found in cast-in-place diaphragm walls. They offer advantages such as fast construction speed, controllable quality, and environmental friendliness.

[0003] The CAM method—a construction process for equal-thickness cement-soil continuous walls using precast box-type wall panels—involves inserting first-order precast walls into trenches after the cement-solidified soil has been poured, followed by second-order precast walls inserted in between. Typically, a double-wheel mixer is used to mix and solidify the soil within the trench section in situ. However, since the height of diaphragm walls usually varies from several meters to tens of meters, efficiently and in real-time monitoring the uniformity of the cement-solidified soil at different depths is a crucial aspect of quality control for fully precast diaphragm walls.

[0004] Traditional cement-based fluidized soil preparation methods rely on on-site sampling and specific gravity measurement to determine the effectiveness of the preparation. This approach cannot achieve real-time monitoring and is also difficult to sample deep cement-based fluidized soil.

[0005] Therefore, how to provide a device that is small in size, causes little disturbance to the fluidized solidified soil, and can locate and detect the uniformity of cement fluidized solidified soil at different depths in real time is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a device for detecting the uniformity of fluidized solidified soil in the construction of fully prefabricated diaphragm walls, aiming to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A device for detecting the uniformity of fluidized solidified soil during the construction of a fully precast diaphragm wall, comprising:

[0009] A worktable, wherein the worktable has a detection rod actuation port;

[0010] The detection rod extends vertically through the detection rod's actuation port. The bottom end of the detection rod has a heated fiber optic detection head. The control circuit of the heated fiber optic detection head is located in the hollow cavity of the detection rod and extends upward through the top end of the detection rod.

[0011] A drive mechanism is provided on the top surface of the worktable, and the drive part of the drive mechanism cooperates with the detection rod and can drive the detection rod to perform up and down lifting movements.

[0012] A control and data processing system is electrically connected to the control circuit of the heated fiber optic detection head and is used to output control signals, receive and process detection signals.

[0013] Through the above technical solution, this utility model integrates the detection rod, drive mechanism, and control and data processing system into a single, complete detection device, facilitating operation and use. The heated fiber optic detection head enables real-time monitoring of the uniformity of cement-solidified fluid at different depths, solving the problem of traditional methods' inability to perform real-time detection. The device is compact in design and small in size, making it easy to move and operate on-site. The use of fiber optic detection technology causes minimal disturbance to the solidified fluid, without affecting its structure and performance.

[0014] Preferably, in the aforementioned device for detecting the uniformity of fluidized solidified soil during the construction of a fully precast diaphragm wall, the detection rod is a rack and pinion structure, and the drive mechanism engages with the teeth on the detection rod via a gear drive to drive the detection rod up and down. Through the engagement of the gear and rack, the up-and-down movement of the detection rod can be precisely controlled, ensuring the accuracy of the detection. The combination of the rack and pinion structure and the gear drive provides stable power transmission, preventing the detection rod from shaking or jamming during lifting. The gear drive method is simple and easy to operate and maintain.

[0015] Preferably, in the aforementioned device for detecting the uniformity of fluidized solidified soil during the construction of a fully precast diaphragm wall, the driving mechanism includes a housing covering the actuation port of the detection rod. The top surface of the housing has a clearance opening for the detection rod to pass through. Drive gears are rotatably connected to the side walls of the housing, meshing with the teeth on the detection rod. One end of the rotating shaft of the drive gear extends through the side wall of the housing and is connected to a rocker arm. The rocker arm drives the detection rod up and down, simplifying operation and eliminating the need for complex mechanical or electrical equipment, thus reducing costs. The housing design isolates the driving mechanism from the external environment, protecting the drive gears and other components from dust and impurities, extending their service life. The housing design also facilitates maintenance and repair of the driving mechanism, improving the reliability of the device.

[0016] Preferably, in the aforementioned device for detecting the uniformity of fluidized solidified soil during the construction of a fully precast diaphragm wall, the drive mechanism further includes multiple guide wheels mounted on the inner wall of the housing. A vertical guide groove is formed on the side wall of the detection rod, and the guide groove engages with the guide wheels in a rolling manner. The engagement between the guide wheels and the guide groove ensures that the detection rod maintains a straight line during lifting and lowering, preventing deviation. The rolling engagement reduces friction between the detection rod and the guide wheels, lowers wear, and extends the service life of the device. A stable guiding system helps improve the accuracy of the detection and ensures the reliability of the detection results.

[0017] Preferably, in the aforementioned device for detecting the uniformity of fluidized solidified soil during the construction of a fully precast diaphragm wall, multiple guide wheels are arranged around the non-toothed surface of the detection rod and are divided into at least two groups along the vertical direction. Multiple groups of guide wheels support the detection rod from different positions, further enhancing its stability. The multi-point arrangement of the guide wheels ensures more uniform force distribution on the detection rod during lifting and lowering, reducing local stress concentration and extending the device's service life. The design of multiple groups of guide wheels improves the overall reliability of the device and reduces the risk of the detection rod jamming or shifting due to guide wheel failure.

[0018] Preferably, in the aforementioned device for detecting the uniformity of fluidized solidified soil during the construction of a fully precast diaphragm wall, the detection rod is provided with graduation marks. The graduation marks visually display the insertion depth of the detection rod, facilitating precise control of the detection depth by the operator. The operator can quickly adjust the position of the detection rod according to the graduation marks, improving detection efficiency. The graduation marks provide an intuitive reference for data recording, facilitating subsequent analysis and processing.

[0019] Preferably, in the aforementioned device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall, the heated fiber optic detection head includes a corundum tube. The top end of the corundum tube is inserted and fixed to the bottom end of the detection rod. The corundum tube has two mounting slots on its inner side. The control circuit includes a heating wire and an optical fiber disposed within the two mounting slots, with the heating wire and optical fiber extending upwards through the top end of the detection rod. Fiber optic detection technology has high sensitivity and high precision, enabling accurate measurement of the temperature change of the fluidized solidified soil, thereby determining its uniformity. The corundum tube has good high-temperature resistance, protecting the optical fiber and heating wire for normal operation in high-temperature environments. Integrating the heating wire and optical fiber within the corundum tube results in a compact structure, facilitating installation and maintenance.

[0020] Preferably, in the aforementioned device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall, the control and data processing system includes a temperature control panel, a fiber optic demodulator, and a data processor. The temperature control panel is electrically connected to the heating wire, the fiber optic demodulator is electrically connected to the optical fiber, and the data processor is electrically connected to both the temperature control panel and the fiber optic demodulator. The temperature control panel can precisely control the power of the heating wire, achieving automated control of the detection process. The fiber optic demodulator and data processor can quickly process the signals transmitted through the optical fiber, display the detection results in real time, and improve detection efficiency. The data processor can analyze and process the detection data, providing more comprehensive analysis results to facilitate decision-making by operators.

[0021] Preferably, in the aforementioned device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall, a pressure head for fixing the control circuit is inserted into the top of the detection rod. The pressure head securely fixes the control circuit, preventing it from loosening or falling off during the detection process. The plug-in design facilitates the installation and replacement of the control circuit, reducing maintenance costs. Fixing the control circuit avoids friction and interference between the circuit and the detection rod, improving the stability and reliability of the device.

[0022] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a device for detecting the uniformity of fluidized solidified soil in the construction of a fully precast diaphragm wall, which has the following beneficial effects:

[0023] 1. Real-time detection and high precision: Utilizing a heated fiber optic detection head and a control and data processing system, the uniformity of solidified fluid at different depths can be monitored in real time, solving the problem of traditional methods being unable to perform real-time detection. Fiber optic detection technology features high sensitivity and high precision, accurately measuring temperature changes to determine the uniformity of solidified soil, resulting in more reliable detection results.

[0024] 2. Simple and Efficient Operation: The detection rod is moved up and down by a joystick, making operation simple and eliminating the need for complex mechanical or electrical equipment, thus reducing costs. The scale markings on the detection rod clearly display the insertion depth, allowing operators to quickly adjust the detection position and improve efficiency. The temperature control panel and data processor automate the detection process and data processing, reducing manual intervention and improving efficiency and accuracy.

[0025] 3. Stable and Durable Structure: The meshing of the rack and pinion and the design of multiple guide wheels ensure that the detection rod maintains linear movement during lifting and lowering, avoiding deviation and swaying, thus improving the stability and accuracy of the detection. The heated fiber optic detection head is protected by a corundum tube, providing excellent high-temperature resistance. The fiber optic detection technology also possesses resistance to electromagnetic interference and long-term stability, making it suitable for harsh environments. The overall design of the device is compact and small in size, facilitating movement and operation on the construction site while minimizing disturbance to the fluidized solidified soil.

[0026] 4. Convenient Maintenance and Reliability: The housing design protects the drive mechanism from dust and impurities, extending its service life; the plug-in pressure head facilitates the installation and replacement of control circuitry, reducing maintenance costs. Multiple sets of guide wheels support the detection rod from different positions, further enhancing the stability and reliability of the device and reducing the risk of failure.

[0027] 5. Economy and Environmental Protection: Manual operation and simple structure reduce equipment and maintenance costs while improving testing efficiency and reducing construction time. The device is compact and causes minimal disturbance to fluidized solidified soil, conforming to the green and environmentally friendly concept of fully prefabricated diaphragm wall construction.

[0028] 6. Comprehensive Optimization: The system integrates detection, driving, control, and data processing functions into a complete detection system, facilitating operation and use. The device can not only detect the uniformity of fluidized solidified soil but also determine the uniformity of curing agent parameters through temperature change curves, providing comprehensive support for construction quality control. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 is a top view of the device provided by this utility model for detecting the uniformity of fluidized solidified soil in the construction of a fully prefabricated diaphragm wall.

[0031] Figure 2 is a structural schematic diagram of the device provided by this utility model for detecting the uniformity of fluidized solidified soil in the construction of a fully prefabricated diaphragm wall, viewed from below.

[0032] Figure 3 is a top view of the structure of the drive mechanism provided by this utility model when opening the top cover of the housing.

[0033] Figure 4 is a schematic diagram of the structure of the detection rod provided by this utility model;

[0034] Figure 5 is a schematic diagram of the structure of the heated fiber optic detection head provided by this utility model.

[0035] in:

[0036] 1-Workbench;

[0037] 11-Detection rod actuation port;

[0038] 2-Detection rod;

[0039] 21-Heated fiber optic detection head; 211-Corundum tube; 2111-Mounting slot; 22-Control circuit; 221-Heating wire; 222-Fiber optic cable; 23-Gerglenoid pattern; 24-Guide groove; 25-Scale marking; 26-Pressure head;

[0040] 3-Drive mechanism;

[0041] 31-Cover; 311-Allowing opening; 32-Drive gear; 33-Rockstick; 34-Guide wheel;

[0042] 4-Control and data processing system;

[0043] 41-Temperature control panel; 42-Fiber optic demodulator; 43-Data processor. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] Referring to Figures 1 and 2, this utility model discloses a device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall, comprising:

[0046] Workbench 1, Workbench 1 has a detection rod actuation port 11;

[0047] The detection rod 2 passes vertically through the detection rod action port 11. The bottom end of the detection rod 2 has a heated fiber optic detection head 21. The control circuit 22 of the heated fiber optic detection head 21 is located in the hollow cavity of the detection rod 2 and extends upward through the top of the detection rod 2.

[0048] Drive mechanism 3 is located on the top surface of workbench 1, and the drive part of drive mechanism 3 cooperates with detection rod 2 and can drive detection rod 2 to perform up and down lifting movements.

[0049] The control and data processing system 4 is electrically connected to the control line 22 of the heated fiber optic detection head 21 and is used to realize the output of control signals, the reception and processing of detection signals.

[0050] In this embodiment, the detection rod 2 is a rack and pinion structure, and the drive mechanism 3 engages with the teeth 23 on the detection rod 2 through gear drive to drive the detection rod 2 to move up and down.

[0051] Referring to Figure 3, the drive mechanism 3 includes a cover 31 covering the detection rod actuation port 11. The top surface of the cover 31 has a clearance opening 311 for the detection rod 2 to pass through. Drive gears 32 are rotatably connected to the two side walls of the cover 31. The drive gears 32 mesh with the teeth 23 on the detection rod 2. One end of the rotation shaft of the drive gear 32 passes through the side wall of the cover 31 and is connected to a rocker arm 33.

[0052] Referring to Figure 4, the drive mechanism 3 also includes a plurality of guide wheels 34 mounted on the inner wall of the housing 31, and a vertical guide groove 24 is provided on the side wall of the detection rod 2, the guide groove 24 and the guide wheel 34 rollingly engaging.

[0053] To further optimize the above technical solution, multiple guide wheels 34 are arranged around the non-toothed surface of the detection rod 2, and are divided into at least two groups along the vertical direction.

[0054] To further optimize the above technical solution, the detection rod 2 is equipped with a scale mark 25.

[0055] Referring to Figure 5, the heated fiber optic detection head 21 includes a corundum tube 211, the top end of which is inserted and fixed to the bottom end of the detection rod 2. The corundum tube 211 has two mounting slots 2111 inside. The control circuit 22 includes a heating wire 221 and an optical fiber 222 disposed in the two mounting slots 2111. The heating wire 221 and the optical fiber 222 extend upward through the top end of the detection rod 2.

[0056] To further optimize the above technical solution, the control and data processing system 4 includes a temperature control panel 41, an optical fiber demodulator 42, and a data processor 43; the temperature control panel 41 is electrically connected to the heating wire 221, the optical fiber demodulator 42 is electrically connected to the optical fiber 222, and the data processor 43 is electrically connected to the temperature control panel 41 and the optical fiber demodulator 42.

[0057] In this embodiment, the temperature control panel 41 is used to control the power of the heating wire; the fiber optic demodulator 42 is used to modulate the optical signal propagated by the fiber optic cable 222 into a temperature signal. The data processor 43 receives the temperature information demodulated on the corundum tube 211 by the fiber optic demodulator 42 via a data line. At the same time, the data processor 43 controls the opening and closing of the temperature control panel 41, as well as parameters such as voltage and current, via the data line.

[0058] To further optimize the above technical solution, a pressure head 26 for fixing the control circuit 22 is inserted into the top of the detection rod 2.

[0059] The overall cross-sectional shape of the detection rod 2 and the corundum tube 211 provided in this embodiment is close to that of a rectangle. In other embodiments, in order to facilitate the movement of the detection rod 2, it can also be designed as a cylindrical structure, with guide wheels that cooperate with the cylinder to ensure the stability of lifting.

[0060] After the CAM method is implemented, the device is moved to the prepared foundation pit. The crank 33 is manually operated to lower the detection rod 2, which has a corundum tube 211, into the soil. The lowering of the detection rod 2 is controlled according to the scale markings 25 on the rod 2. Then, the temperature control panel 41 heats the heating wire 221, thereby heating the optical fiber 222. Finally, heating is stopped, and the temperature-time curve is used to determine if the curing agent dosage is uniform. If the curing agent dosage is low, the thermal conductivity of the cement-fluidized soil will deteriorate, resulting in a faster temperature drop.

[0061] This embodiment can detect the curing agent content at different depths, and because it uses FBG optical fiber, the detection results are more accurate and can be detected in real time.

[0062] FBG offers higher sensitivity and accuracy, enabling real-time online monitoring. It is resistant to electromagnetic interference and exhibits better adaptability to harsh environments, along with longer-term stability and durability. FBG also boasts greater embedding compatibility; with fiber diameters only a few hundred micrometers, it can be directly embedded within materials (such as prepreg laminates) with minimal interference to the material's structural properties, ensuring accurate monitoring. Furthermore, the FBG sensor is small in size, allowing for rapid restoration of fluidized solidified soil after removal.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall, characterized in that, include: A worktable (1) has a detection rod actuation port (11); a detection rod (2) passes vertically through the detection rod actuation port (11), and the bottom end of the detection rod (2) has a heated fiber optic detection head (21), the control line (22) of the heated fiber optic detection head (21) is located in the hollow cavity of the detection rod (2) and extends upward through the top end of the detection rod (2); a drive mechanism (3) is located on the top surface of the worktable (1), and the drive part of the drive mechanism (3) cooperates with the detection rod (2) and can drive the detection rod (2) to perform up and down lifting actions; a control and data processing system (4) is electrically connected to the control line (22) of the heated fiber optic detection head (21) and is used to realize the output of control signals, the reception and processing of detection signals.

2. The device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall according to claim 1, characterized in that, The detection rod (2) is a rack and pinion structure. The driving mechanism (3) meshes with the teeth (23) on the detection rod (2) through gear drive, driving the detection rod (2) to move up and down.

3. The device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall, as described in claim 2, is characterized in that... The drive mechanism (3) includes a cover (31) covering the action port (11) of the detection rod. The top surface of the cover (31) has a clearance opening (311) for the detection rod (2) to pass through. Drive gears (32) are rotatably connected to the two side walls of the cover (31). The drive gears (32) mesh with the teeth (23) on the detection rod (2). One end of the rotation shaft of the drive gear (32) passes through the side wall of the cover (31) and is connected to a rocker arm (33).

4. The device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall according to claim 3, characterized in that, The drive mechanism (3) also includes a plurality of guide wheels (34) mounted on the inner wall of the housing (31). A vertical guide groove (24) is provided on the side wall of the detection rod (2), and the guide groove (24) rolls with the guide wheel (34).

5. The device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall according to claim 4, characterized in that, Multiple guide wheels (34) are arranged around the non-toothed surface of the detection rod (2) and are divided into at least two groups in the vertical direction.

6. The device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall according to claim 4, characterized in that, The detection rod (2) is provided with scale markings (25).

7. The device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall according to claim 1, characterized in that, The heated fiber optic detection head (21) includes a corundum tube (211), the top end of which is inserted and fixed to the bottom end of the detection rod (2). The corundum tube (211) has two mounting slots (2111) on its inner side. The control circuit (22) includes a heating wire (221) and an optical fiber (222) disposed in the two mounting slots (2111). The heating wire (221) and the optical fiber (222) extend upward through the top end of the detection rod (2).

8. The device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall according to claim 7, characterized in that, The control and data processing system (4) includes a temperature control panel (41), an optical fiber demodulator (42), and a data processor (43); the temperature control panel (41) is electrically connected to the heating wire (221), the optical fiber demodulator (42) is electrically connected to the optical fiber (222), and the data processor (43) is electrically connected to the temperature control panel (41) and the optical fiber demodulator (42).

9. The device for detecting the uniformity of fluidized solidified soil during the construction of a fully prefabricated diaphragm wall according to claim 1, characterized in that, The top of the detection rod (2) is fitted with a pressure head (26) for fixing the control circuit (22).

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