Guiding device and method for prefabricated diaphragm wall construction

Abstract

The invention relates to the technical field of underground engineering, and discloses a guiding device and method for prefabricated diaphragm wall construction, and the guiding device comprises a pile casing, a positioning mechanism, a position auxiliary adjusting mechanism and a data processing terminal. Relative position data of the pile casing and the prefabricated diaphragm wall are obtained in real time through the positioning mechanism, and the data are accurately analyzed and processed through the data processing terminal and converted into control signals. The auxiliary position adjusting mechanism can accurately adjust the output air pressure of the air pressure device according to the control signals. The adjusting process further affects the soil pressure around the prefabricated underground diaphragm wall, necessary auxiliary force is provided for the prefabricated underground diaphragm wall, and the position of the prefabricated underground diaphragm wall can be accurately adjusted. By means of the series of technical means, it is ensured that the perpendicularity and levelness of the prefabricated diaphragm wall in the lowering process can strictly meet the construction requirements, the problem that in the prior art, the perpendicularity is difficult to control in the lowering process of the prefabricated wall is effectively solved, and therefore the construction quality is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of underground engineering, and particularly to a guiding device and method for the construction of precast diaphragm walls. Background Technique

[0002] The precast diaphragm wall is a new type of underground retaining structure. It is prefabricated in a factory and hoisted, assembled, and lowered at the construction site. Most of the wall structures of fully precast diaphragm walls adopt hollow profiles, which are convenient for transportation and suspension. At the same time, through corresponding structural measures and joint forms, the structure can be spliced more tightly, meeting the requirements of structural waterproofing. Therefore, the precast diaphragm wall not only fully inherits the advantages of traditional cast-in-place diaphragm walls, facilitating large-scale factory production, but also can solve engineering problems such as irregular mud inclusion and leakage in cast-in-place diaphragm walls, featuring advantages such as fast construction speed, controllable quality, and environmental friendliness.

[0003] The CAM method that has emerged for the construction of precast diaphragm walls has also become a research hotspot in recent years. This process uses a double-wheel deep mixing method to form a groove, sprays and stirs a curing liquid (such as cement slurry and other curing agents) after forming a rectangular groove section, inserts precast diaphragm walls at intervals after forming the cured soil slurry, and finally the precast diaphragm wall and the cured soil together form a water-stop curtain to play a role. Since this process does not require procedures such as lowering the steel reinforcement cage and pouring concrete, it greatly simplifies the construction process and reduces the pollution of muck, noise, and dust caused by on-site construction. It is a new type of green and environmentally friendly construction technology.

[0004] The combination of precast diaphragm walls and CAM construction technology is a technological innovation based on the development of traditional diaphragm walls, and there are relatively few relevant domestic research and applications. Under the CAM construction technology, the wall verticality during the sinking process of the precast wall affects the sinking quality. The existing technology guides the wall to be lowered through a guide wall and a positioning frame on the ground, but it is difficult to control the verticality of the wall body after it is lowered into the groove, and the phenomenon of tilting and jamming is likely to occur, which has hindered the popularization of this construction technology.

[0005] Therefore, there is an urgent need to improve and innovate on the existing technical methods, propose a method that can assist the precast wall in maintaining verticality during the lowering process, and provide an effective device and equipment, which are problems that need to be solved urgently by those skilled in the art.

[0006] The application scope of the present invention is mainly aimed at the construction process of lowering precast walls on-site, where it is difficult to ensure the verticality of precast wall construction on-site. Therefore, in response to the above problems, the present invention is mainly applied to actual on-site projects. Summary of the Invention

[0007] The purpose of the present invention is to provide a guiding device and method for the construction of precast diaphragm walls to solve the problems raised in the above background technique.

[0008] To achieve the above object, the present invention provides the following technical solutions: A guiding device for precast diaphragm wall construction, comprising a casing, a positioning mechanism, a position auxiliary adjustment mechanism, and a data processing terminal. The casing is of a detachable design and can be combined and adjusted according to different wall sizes. There is an adjustment gap between the casing and the wall body to adapt to different construction requirements. The positioning mechanism includes a GPS laser sensor and a data receiving device. The GPS laser sensors are evenly arranged on the casing and are used to obtain the data information of the relative position between the wall body in the casing and the casing in real time to ensure the accuracy of positioning. The data receiving device analyzes, processes, and dynamically displays the position data information collected by the GPS laser sensor to guide the adjustment of the position of the precast diaphragm wall. The position auxiliary adjustment mechanism includes a plurality of high-pressure inflatable tubes and a pneumatic device. The high-pressure inflatable tubes are arranged in the precast diaphragm wall and are fixedly connected to the steel bars in the precast wall body. The pneumatic device is placed on the construction platform for easy operation and control. The data processing terminal is used to obtain the position information data of the positioning mechanism and convert it into a control signal for output to the pneumatic device of the position auxiliary adjustment mechanism to guide the work of the position auxiliary adjustment mechanism.

[0009] Preferably, the joints of the high-pressure inflatable tubes are reserved on the upper side of the precast diaphragm wall and are connected to the pneumatic device of the position auxiliary adjustment mechanism through extension pipelines.

[0010] Preferably, the data processing terminal is respectively connected to the data receiving device of the positioning mechanism and the pneumatic device of the position auxiliary adjustment mechanism by signals.

[0011] Another technical problem to be solved by the present invention is to provide a method for using the guiding device for precast diaphragm wall construction described above, comprising the following steps: Step S1 Construction preparation: Sort out the construction platform to ensure that the construction area is flat and free of obstacles; use a mixer to fully stir the soil in the target trench with water and cement to prepare for the installation of the guiding device. Step S2 Install the guiding device: Install the guiding device for precast diaphragm wall construction described above into the trench, ensure that the casing is closely attached to the trench wall, and the positioning mechanism and the position auxiliary adjustment mechanism work properly. Step S3 Check the performance of the mechanism: Before starting to hoist and lower the precast diaphragm wall, check the working performance of each mechanism to ensure that the working signals of each mechanism are normal and the positioning mechanism can accurately obtain data information. Step S4 Hoist and lower the precast diaphragm wall: Carry out the hoisting and lowering work of the precast diaphragm wall. When lowering the precast diaphragm wall, lower it vertically along the inside of the casing to ensure the stability and accuracy during the lowering process. Step S5: Real-time monitoring and position adjustment: The positioning mechanism real-time monitors the data information of the relative position between the casing and the precast diaphragm wall, and converts the monitoring data into control instructions through a data terminal; The position auxiliary adjustment mechanism adjusts the air pressure output by the air pressure device according to the control instructions. The output air pressure affects the earth pressure around the precast diaphragm wall to assist in adjusting the position of the precast diaphragm wall, ensuring that the verticality and horizontality of the precast diaphragm wall meet the construction requirements; Step S6: Continuous monitoring and adjustment: During the lowering process of the precast diaphragm wall, the positioning mechanism continuously and synchronously monitors the relative position data information between the casing and the precast diaphragm wall, and outputs the monitoring data to the data receiving device; Step S7: Complete the construction: When the precast diaphragm wall is lowered to the predetermined position and both the verticality and horizontality meet the construction requirements, stop the operation of the position auxiliary adjustment mechanism to complete the construction of the precast diaphragm wall.

[0012] Preferably, step S6 further includes that the data receiving device transmits the data to the data terminal. The data terminal processes the received information into control instructions. The position auxiliary adjustment mechanism adjusts the air pressure of the high-pressure air pipe according to the control instructions to ensure the uniformity of the pressure around the precast diaphragm wall during the lowering process, thereby adjusting the lowering attitude and ensuring that the verticality and horizontality of the precast diaphragm wall always meet the construction requirements.

[0013] The present invention provides a guiding device and method for precast diaphragm wall construction. It has the following beneficial effects: (1) The present invention obtains the relative position data between the casing and the precast diaphragm wall in real time through the positioning mechanism, and after precise analysis and processing by the data processing terminal, converts these data into control signals. The position auxiliary adjustment mechanism can accurately adjust the air pressure output of the air pressure device according to these control signals. This adjustment process further affects the earth pressure around the precast diaphragm wall, providing the necessary auxiliary force for the precast diaphragm wall to enable precise position adjustment. This series of technical means ensures that the verticality and horizontality of the precast diaphragm wall during the lowering process can strictly meet the construction requirements, effectively solving the problem that it is difficult to control the verticality during the lowering process of the precast wall in the prior art, thus significantly improving the construction quality.

[0014] (2) The application of the guiding device and method of the present invention effectively avoids many potential safety hazards during the construction of precast walls. In the traditional precast wall construction method, due to uneven stress on the wall body, phenomena such as deflection and card slot are extremely likely to occur. These problems not only affect the construction progress but also pose great potential safety hazards to the construction. However, the guiding device and method of the present invention ensure the stability and accuracy of the wall body during the lowering process by real-time monitoring and adjusting the position of the precast diaphragm wall. This precise control method avoids safety accidents caused by wall body deflection, card slot, etc., and provides strong protection for the lives of construction workers.

[0015] (3) The guiding device and method for the construction of the precast diaphragm wall of the present invention have broad application prospects and profound fundamental significance. It not only successfully solves the technical problems in the existing precast wall construction process, improves the construction efficiency and quality, but also provides new ideas and methods for the research of the construction technology of precast diaphragm walls. The application of this invention will strongly promote the further development of the precast diaphragm wall technology, and make important supplements and improvements to the existing technology for controlling the verticality of the lowering of precast diaphragm walls. At the same time, it also makes a positive contribution to the technological innovation and development in the field of underground engineering, and has broad application value and profound social significance. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the present invention; In the figure: casing 21, GPS laser sensor 22, data receiving device 23, pneumatic device 24, data processing terminal 25. Detailed Embodiment

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0019] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Embodiment 1: A preferred embodiment of a guiding device for precast diaphragm wall construction provided by the present invention is as Figure 1 shown: A guiding device for precast diaphragm wall construction includes a casing 21, a positioning mechanism, a position auxiliary adjustment mechanism, and a data processing terminal 25. The casing 21 is of a detachable design and can be combined and adjusted according to different wall sizes. There is an adjustment gap between the casing 21 and the wall body to adapt to different construction requirements; The positioning mechanism includes a GPS laser sensor 22 and a data receiving device 23. The GPS laser sensors are evenly arranged on the casing 21 and are used to obtain the data information of the relative position between the wall body in the casing 21 and the casing 21 in real time to ensure the accuracy of positioning. The data receiving device 23 analyzes, processes, and dynamically displays the position data information collected by the GPS laser sensors to guide the adjustment of the position of the precast diaphragm wall. In this embodiment, there are eight GPS laser sensors 22, four of which are arranged at the four corners of the top end of the casing 21, and the other four are arranged at the midpoints of the four sides of the top end of the casing 21; The position auxiliary adjustment mechanism includes a number of high-pressure inflatable tubes and a pneumatic device 24. The high-pressure inflatable tubes are arranged inside the precast diaphragm wall and are fixedly connected to the steel bars inside the precast wall body. The joints of the high-pressure inflatable tubes are reserved on the upper side of the precast diaphragm wall and are connected to the pneumatic device 24 of the position auxiliary adjustment mechanism through an extended pipeline. The pneumatic device 24 is placed on the construction platform for easy operation and control; In this embodiment, there are 24 high-pressure inflatable tubes, with every three tubes set as a group, a total of eight groups. Four groups are arranged in the four corner directions of the precast diaphragm wall, and the other four groups are respectively arranged at the midpoint positions of the four sides of the precast diaphragm wall. Three spaced surfaces are taken out at equal intervals from top to bottom along the arranged positions of each group of high-pressure inflatable tubes; The working principle of the pneumatic device 24 is as follows: After the position data collected by the GPS laser sensor 22 is processed and converted, it is transmitted to the pneumatic device 24. The pneumatic device 24 adjusts the output air pressure according to the processed data to assist in adjusting the plane and vertical position of the precast diaphragm wall. Then, the GPS laser sensor 22 collects data again and performs the above adjustment until the precast diaphragm wall is lowered to the preset position, achieving accurate guidance for the lowering of the precast diaphragm wall and improving the vertical accuracy of the lowering construction of the precast diaphragm wall. The data processing terminal 25 is used to obtain the position information data of the positioning mechanism, process and convert it into a control signal, and output it to the pneumatic device 24 of the position auxiliary adjustment mechanism to guide the work of the position auxiliary adjustment mechanism. The data processing terminal 25 is respectively signal-connected to the data receiving device 23 of the positioning mechanism and the pneumatic device 24 of the position auxiliary adjustment mechanism.

[0021] Embodiment 2: On the basis of Embodiment 1, it is further obtained that another technical problem to be solved by the present invention is to provide a guiding method for the construction of a precast diaphragm wall. Using the above-mentioned guiding device for the construction of a precast diaphragm wall, it includes the following steps: Step S1 Construction preparation: Sort out the construction platform to ensure that the construction area is flat and free of obstacles; use a mixer to fully stir the soil in the target groove with water and cement evenly to prepare for the installation of the guiding device. Step S2 Install the guiding device: Install the above-mentioned guiding device for the construction of a precast diaphragm wall into the groove, ensure that the casing is closely attached to the groove wall, and the positioning mechanism and the position auxiliary adjustment mechanism work normally. Step S3 Check the performance of the mechanism: Before starting to hoist and lower the precast diaphragm wall, check the working performance of each mechanism to ensure that the working signals of each mechanism are normal and the positioning mechanism can accurately obtain data information. Step S4 Hoist and lower the precast diaphragm wall: Carry out the hoisting and lowering work of the precast diaphragm wall. When the precast diaphragm wall is lowered, it is vertically lowered along the inside of the casing to ensure the stability and accuracy during the lowering process. Step S5 Real-time monitoring and position adjustment: The positioning mechanism real-time monitors the data information of the relative position between the casing and the precast diaphragm wall, and converts the monitored data into a control instruction through the data terminal. The position auxiliary adjustment mechanism adjusts the output air pressure of the pneumatic device according to the control instruction. The output air pressure affects the soil pressure around the precast diaphragm wall to assist in adjusting the position of the precast diaphragm wall, ensuring that the verticality and levelness of the precast diaphragm wall meet the construction requirements. Step S6 Continuous monitoring and adjustment: During the lowering process of the precast diaphragm wall, the positioning mechanism continuously and synchronously monitors the relative position data information between the casing and the precast diaphragm wall, and outputs the monitoring data to the data receiving device; the data receiving device transmits the data to the data terminal, and the data terminal processes the received information into control instructions. The position auxiliary adjustment mechanism adjusts the air pressure of the high-pressure air pipe according to the control instructions to ensure the uniformity of the pressure received by the precast diaphragm wall during the lowering process, thereby adjusting the lowering attitude and ensuring that the verticality and horizontality of the precast diaphragm wall always meet the construction requirements; Step S7 completes the construction: When the precast diaphragm wall is lowered to the predetermined position and both the verticality and horizontality meet the construction requirements, stop the operation of the position auxiliary adjustment mechanism to complete the construction of the precast diaphragm wall.

[0022] During use, tidy up the construction platform. The mixer fully stirs the soil, water, and cement in the target trench evenly, and installs the guiding device into the trench; check the working performance of each mechanism. After the working signals of each mechanism are normal, the positioning mechanism starts to work for the hoisting and lowering of the precast diaphragm wall. When the precast diaphragm wall is lowered, it is lowered vertically along the inside of the casing. When the precast diaphragm wall is lowered, turn on the air pressure device. The air pressure in the high-pressure air pipe protects the air pressure pipeline from being blocked by the flowing and solidified soil during the lowering of the precast diaphragm wall; During construction, the positioning mechanism synchronously monitors the relative position data information between the casing and the precast diaphragm wall, and outputs the monitoring data to the data receiving device. The data receiving device transmits the data to the data terminal, and the data terminal processes the received information into control instructions. The position auxiliary adjustment mechanism adjusts the air pressure of the high-pressure air pipe according to the control instructions to ensure the uniformity of the pressure received by the precast diaphragm wall during the lowering process and adjust the lowering attitude, ensuring that the verticality and horizontality of the precast diaphragm wall meet the construction requirements until the construction is completed; That is, after the position auxiliary adjustment mechanism adjusts the position of the precast diaphragm wall according to the control instructions, the positioning mechanism monitors the relative position information between the casing and the precast diaphragm wall again until the verticality of the precast diaphragm wall meets the preset construction requirements; That is, the relative position data between the casing and the precast diaphragm wall is collected in real time through the GPS laser sensor, and this data is analyzed, processed, and dynamically displayed, and the position adjustment process of the precast diaphragm wall is guided; after the position data is processed and converted, the earth pressure around the precast diaphragm wall is adjusted through twenty-four high-pressure charging pipes to assist in adjusting the wall position of the precast diaphragm wall, and then the GPS laser sensor collects data again and performs the above adjustments until the precast diaphragm wall is adjusted to the preset position, realizing the accurate guidance of the lowering of the precast diaphragm wall and improving the vertical accuracy of the lowering construction of the precast diaphragm wall.

[0023] In summary, the relative position data information of the precast wall and the casing is obtained through the positioning mechanism, and the adjustment action of the precast diaphragm wall is assisted by the position auxiliary adjustment mechanism, so as to achieve the accurate positioning of the precast diaphragm wall guide, improve the vertical accuracy of the hoisting and lowering of the precast diaphragm wall, solve the safety hazards such as wall body skew and card slot caused by uneven force during the construction process of the existing precast wall, and ensure the construction quality. The invention has good basic significance for the research on the construction technology of the precast diaphragm wall, can supplement the existing verticality control technology for the lowering of the precast diaphragm wall, and has broad application prospects.

[0024] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0025] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A guiding device for precast diaphragm wall construction, characterized in that It includes a casing (21), a positioning mechanism, a position auxiliary adjustment mechanism, and a data processing terminal (25). The casing (21) is of a detachable design and can be combined and adjusted according to different wall sizes. There is an adjustment gap between the casing (21) and the wall body to adapt to different construction requirements. The positioning mechanism includes a GPS laser sensor (22) and a data receiving device (23). The GPS laser sensors are evenly arranged on the casing (21) and are used to obtain the data information of the relative position between the wall body in the casing (21) and the casing (21) in real time to ensure the accuracy of positioning. The data receiving device (23) analyzes, processes, and dynamically displays the position data information collected by the GPS laser sensor to guide the adjustment of the position of the precast diaphragm wall. The position auxiliary adjustment mechanism includes a number of high-pressure inflatable tubes and a pneumatic device (24). The high-pressure inflatable tubes are arranged in the precast diaphragm wall and are fixedly connected to the steel bars in the precast wall body. The pneumatic device (24) is placed on the construction platform for easy operation and control. The data processing terminal (25) is used to obtain the position information data of the positioning mechanism, process it, and convert it into a control signal to output to the pneumatic device (24) of the position auxiliary adjustment mechanism to guide the work of the position auxiliary adjustment mechanism.

2. The guiding device for precast diaphragm wall construction according to claim 1, characterized in that: The joint of the high-pressure inflatable tube is reserved to be connected to the pneumatic device (24) of the position auxiliary adjustment mechanism through an extended pipeline on the upper side of the precast diaphragm wall.

3. The guiding device for precast diaphragm wall construction according to claim 1, characterized in that: The data processing terminal (25) is signal-connected to the data receiving device (23) of the positioning mechanism and the pneumatic device (24) of the position auxiliary adjustment mechanism respectively.

4. A method for using a guiding device in the construction of precast diaphragm walls according to any one of claims 1 to 3, characterized in that, It includes the following steps: Step S1 Construction preparation: Sort out the construction platform to ensure that the construction area is flat and free of obstacles. Use a mixer to fully stir the soil in the target trench with water and cement evenly to prepare for the installation of the guiding device. Step S2 Install the guiding device: Install the guiding device for the above-mentioned precast diaphragm wall construction into the trench to ensure that the casing is closely attached to the trench wall, and the positioning mechanism and the position auxiliary adjustment mechanism work properly. Step S3 Check the performance of the mechanism: Before starting to hoist and lower the precast diaphragm wall, check the working performance of each mechanism to ensure that the working signals of each mechanism are normal and the positioning mechanism can accurately obtain data information. Step S4 Hoist and lower the precast diaphragm wall: Carry out the hoisting and lowering work of the precast diaphragm wall. When the precast diaphragm wall is lowered, it is lowered vertically along the inside of the casing to ensure the stability and accuracy during the lowering process. Step S5 Real-time monitoring and position adjustment: The positioning mechanism monitors the data information of the relative position between the casing and the precast diaphragm wall in real time, and converts the monitoring data into a control instruction through the data terminal. The position auxiliary adjustment mechanism adjusts the air pressure output by the pneumatic device according to the control instruction. The output air pressure assists in adjusting the position of the precast diaphragm wall by affecting the soil pressure around the precast diaphragm wall to ensure that the verticality and horizontality of the precast diaphragm wall meet the construction requirements. Step S6 Continuous monitoring and adjustment: During the lowering process of the precast diaphragm wall, the positioning mechanism continuously synchronously monitors the relative position data information between the casing and the precast diaphragm wall and outputs the monitoring data to the data receiving device. Step S7 Complete the construction: When the precast diaphragm wall is lowered to the predetermined position and both the verticality and the levelness meet the construction requirements, stop the operation of the position auxiliary adjustment mechanism to complete the construction of the precast diaphragm wall.

5. A guiding method for precast diaphragm wall construction according to claim 4, characterized in that: The step S6 further includes that the data receiving device transmits the data to the data terminal, the data terminal processes the received information into control instructions, and the position auxiliary adjustment mechanism adjusts the air pressure of the high-pressure air pipe according to the control instructions to ensure the uniformity of the pressure received by the precast diaphragm wall during the lowering process, thereby adjusting the lowering attitude and ensuring that the verticality and the levelness of the precast diaphragm wall always meet the construction requirements.

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