Construction method for measuring concrete pouring height of underground diaphragm wall

Abstract

The invention provides a construction method for measuring the concrete pouring height of an underground diaphragm wall, and belongs to the technical field of pouring height measuring methods. According to the construction method for measuring the concrete pouring height of the underground diaphragm wall, the pressure sensor is installed on the reinforcement cage of the underground diaphragm wall, the ground console calculates the electric signal of the sensor to obtain concrete pressure data, and the concrete top surface elevation of the underground diaphragm wall can be obtained after conversion according to a liquid pressure formula. The problem that the concrete top surface height is difficult to accurately measure in the concrete pouring process of an underground diaphragm wall, especially a falling suspension type underground diaphragm wall, can be effectively solved, the measurement result is accurate, and the top surface height can be monitored in real time, so that the top surface height is accurately measured and controlled, and the working efficiency is improved. Concrete material waste caused by excessive concrete over-pouring due to inaccurate measurement is avoided, and the normal construction period cannot be affected by chiseling off the over-poured concrete.

Description

Technical Field

[0001] The invention belongs to the technical field of pouring height measurement methods, and in particular relates to a construction method for measuring the height of pouring concrete of an underground continuous wall. Background Art

[0002] During the concrete pouring process of underground continuous walls, it is necessary to continuously measure the height changes of the concrete top surface within the trench section to monitor the wall quality and control the wall top elevation. Traditionally, this measurement method involves manual measurement using measuring ropes, long steel bars, or bamboo poles.

[0003] Because the top surface of underground continuous walls contains a mixture of concrete and retaining slurry, its thickness and hardness are subject to significant uncertainty. Traditional measurement methods rely entirely on the surveyor's feel and experience, resulting in significant errors. Accurately measuring the height of the concrete top surface is particularly challenging for low-hanging underground continuous walls, where the top elevation is significantly elevated from the ground. To ensure the quality of the concrete at the top of the wall, control of the top elevation is often conservative, leading to an overestimation of the thickness of the concrete and slurry mixture. Inaccurate measurement of the concrete top surface height can easily lead to over-pouring of concrete, resulting in waste of concrete material. Later removal of the concrete top surface poses safety risks and can also impact the overall construction progress. Summary of the Invention

[0004] In order to make the operation of the socket-type plates easier and the connection faster during the connection construction, the present invention provides a construction method for measuring the height of the poured concrete of the underground continuous wall.

[0005] The technical solutions of the present invention are as follows:

[0006] A construction method for measuring the height of underground continuous wall concrete pouring, specifically comprising the following steps:

[0007] S1. Place a steel cage equipped with a pressure sensor in a slot section of a continuous wall, wherein the pressure sensor is connected to a ground control console via a wired or wireless connection.

[0008] S2. Before pouring concrete for the underground continuous wall, the ground control console measures the initial value of the electrical signal through the pressure sensor;

[0009] S3, the ground control console calculates the pressure at the location of the pressure sensor based on the trench depth and mud density of the underground continuous wall, and combines the initial value of the electrical signal measured in step S2 to obtain a conversion relationship between the electrical signal of the pressure sensor and the pressure;

[0010] S4. During the pouring of concrete for the underground continuous wall, the ground control console measures real-time pressure data through a pressure sensor, and then calculates the data of the height of the concrete top surface.

[0011] Furthermore, in step S1, the pressure sensor is installed on or near the top of the steel cage.

[0012] Furthermore, in step S1, the pressure sensor is connected to the ground control console via a data cable, and the data cable is laid and fixed along the reinforcement cage suspension bars.

[0013] Furthermore, the pressure sensor converts the detected pressure value into a 4-20mA electrical signal output and transmits it remotely to the ground control console via a data line.

[0014] Furthermore, there are multiple pressure sensors on the steel cage, and the ground control console obtains the average value of the electrical signals of the multiple pressure sensors as calculation data.

[0015] Furthermore, in step S4, the pressure sensor measures real-time pressure data, specifically:

[0016] The pressure sensor transmits the measured electrical signal to the ground control console, which calculates the corresponding pressure data based on the conversion relationship between the pressure sensor electrical signal and pressure.

[0017] Furthermore, in step S4, the calculation formula of the concrete top surface height data h2 is:

[0018] h2=H-h1;

[0019] Where H is the trench depth of the underground continuous wall;

[0020] h1 is the height between the concrete liquid level and the bottom of the groove section of the diaphragm wall.

[0021] Furthermore, the height h1 between the concrete liquid surface and the bottom of the trough section of the continuous wall is calculated as follows:

[0022] h1=P / ρg;

[0023] Wherein, P is the pressure data measured by the pressure sensor;

[0024] ρ is the density of concrete;

[0025] g is the acceleration due to gravity.

[0026] Furthermore, the ground control console is provided with an interactive display and an alarm, wherein the interactive display is used to display the height value of the top surface of the concrete, and the alarm is used to sound an alarm when the measured height value of the top surface of the concrete reaches a preset value.

[0027] Furthermore, in step S4, concrete is poured into the trough section of the continuous wall through a hopper, and the bottom of the conveying pipe of the hopper is close to the bottom of the trough section of the continuous wall.

[0028] The beneficial effects of the present invention are as follows:

[0029] The invention provides a construction method for measuring the height of poured concrete for an underground continuous wall, which can effectively solve the problem that the height of the top surface of concrete is difficult to measure accurately during the pouring of concrete for an underground continuous wall, especially a drop-hanging underground continuous wall. By using a pressure sensor to assist in measuring the height of the top surface of concrete, the measurement result is more accurate, and the top surface height can be monitored in real time, thereby accurately measuring and controlling the top surface height, avoiding waste of concrete materials caused by excessive over-pouring of concrete due to inaccurate measurement, and not affecting the normal construction period due to chiseling out the over-pouring concrete.

[0030] Furthermore, the construction method of the present invention for measuring the height of poured concrete of an underground continuous wall is relatively quick and convenient in actual operation and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a flow chart of a construction method for measuring the height of underground continuous wall concrete pouring according to an embodiment of the present invention;

[0032] Figure 2 Schematic diagram of the installation of a pressure sensor on a steel cage according to an embodiment of the present invention;

[0033] Figure 3 2 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention when measuring an initial value of an electrical signal;

[0034] Figure 4 Schematic diagram of the structure of the pressure sensor measuring the height of concrete in an embodiment of the present invention.

[0035] In the figure: 1. Pressure sensor; 2. Steel cage; 3. Ground control console; 4. Steel cage suspension rod; 5. Data cable; 6. Hopper. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0037] Example:

[0038] refer to Figures 1 to 4 This embodiment provides a construction method for measuring the height of underground continuous wall concrete pouring, which specifically includes the following steps: S1-S4.

[0039] S1. Place the steel cage 2 equipped with the pressure sensor 1 in the groove section of the continuous wall. The pressure sensor 1 is connected to the ground control console 3 via wire or wireless connection.

[0040] The steel cage 2 may include a plurality of vertical truss bars and a plurality of vertical ground wall main bars located on both sides of the plurality of vertical truss bars, as well as a plurality of transverse ground wall horizontal bars. The plurality of horizontal ground wall bars connect the plurality of vertical truss bars and the vertical ground wall main bars to form a mesh structure.

[0041] As a preferred embodiment, in step S1, the pressure sensor 1 is installed on the top of the steel cage 2 or near the top of the steel cage 2. The pressure sensor 1 can be specifically installed on the vertical hoist reinforcement of the steel cage 2. The concrete pouring height is above the position of the pressure sensor 1. The pressure sensor 1 is connected to the ground control console 3 through the data cable 5, and the data cable 5 is laid and fixed along the steel cage suspension bar 4.

[0042] Preferably, the ground control console 3 is provided with an interactive display and an alarm. The interactive display can input parameters and display parameters. The interactive display can be an LCD display, an OLED display or other display with display function. The ground control console 3 can also include a controller. The controller can be any applicable computing device, such as a personal computer, a server, a programmable logic controller (PLC controller for short), a single-chip microcomputer, etc., or it can be an integration of computer devices.

[0043] Specifically, the required concrete top surface height value can be preset through the interactive display, and the measured concrete top surface height value can be displayed in real time. When the measured concrete top surface height value reaches the preset value, an alarm will be sounded through the alarm to remind the staff so that the staff can stop the concrete pouring work in time. After the measurement work is completed, the pressure sensor 1 remains in the concrete, and the data line 5 can be disconnected, so that the ground control console 3 can continue to be used at the next detection construction location.

[0044] As a preferred embodiment, there are multiple pressure sensors 1 on the steel cage 2, and the ground control console 3 obtains the average value of the electrical signals of the multiple pressure sensors 1 as calculation data, which can improve the accuracy of data monitoring.

[0045] S2. Before pouring concrete for the underground continuous wall, the ground control console 3 measures the initial value of the electrical signal through the pressure sensor 1.

[0046] The pressure sensor 1 converts the detected pressure value into a 4-20mA electrical signal output and transmits it remotely to the ground control console 3 through the data line 5. The pressure sensor 1 is also called a pressure transmitter. It is a device or apparatus that can sense the pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.

[0047] S3, the ground control console 3 according to the underground continuous wall groove depth H, mud density ρ 泥浆 , according to the liquid pressure formula P 初始 =ρ 泥浆 gH, calculate the pressure P at the location of pressure sensor 1 初始 Combined with the initial value of the electrical signal measured in step S2, the conversion relationship between the electrical signal of the pressure sensor 1 and the pressure is obtained. According to the conversion relationship, the ground control console 3 can directly convert the electrical signal measured by the pressure sensor 1 into pressure data output.

[0048] S4. During the pouring of concrete for the underground continuous wall, the ground control console 3 measures the real-time pressure data through the pressure sensor 1, and then calculates the data of the height of the concrete top surface, monitors the height of the concrete top surface in real time, and stops pouring the concrete when the concrete top surface reaches the required height, thereby achieving precise control of the height of the concrete pouring top surface and avoiding over-pouring.

[0049] Reference Figure 4 Before pouring concrete for the underground continuous wall, the delivery pipe of the hopper 6 can be inserted into the trough section of the continuous wall, and the bottom of the delivery pipe of the hopper 6 is close to the bottom of the trough section of the continuous wall. During the process of pouring concrete for the underground continuous wall, the concrete is poured into the trough section of the continuous wall through the hopper 6, and the top surface of the concrete gradually rises. In this way, when the top surface of the concrete does not reach the position of the pressure sensor 1, the real-time pressure data measured by the pressure sensor 1 remains basically unchanged. When the top surface of the concrete exceeds the position of the pressure sensor 1, the real-time pressure data measured by the pressure sensor 1 begins to gradually change. By adopting the above method, the concrete can be prevented from contacting the pressure sensor 1 before the top surface of the concrete reaches the position of the pressure sensor 1, so that the pressure sensor 1 can accurately reflect the changes in the top surface of the concrete.

[0050] As a preferred embodiment, in step S4, the ground control console 3 measures real-time pressure data through the pressure sensor 1, specifically:

[0051] The pressure sensor 1 transmits the measured electrical signal to the ground control console 3. The ground control console 3 calculates the corresponding pressure data based on the conversion relationship between the electrical signal of the pressure sensor 1 and the pressure. When the concrete is poured from the bottom of the continuous wall groove to the height of the pressure sensor 1, the pressure sensor 1 begins to detect the pressure of the concrete.

[0052] As a preferred embodiment, in step S4, the calculation formula of the concrete top surface height data h2 is:

[0053] h2=H-h1;

[0054] Where H is the trench depth of the underground continuous wall;

[0055] h1 is the height between the concrete liquid level and the bottom of the groove section of the diaphragm wall.

[0056] The calculation formula for the height h1 between the concrete liquid surface and the bottom of the diaphragm wall slot section is:

[0057] h1=P / ρg;

[0058] Wherein, P is the pressure data measured by pressure sensor 1;

[0059] ρ is the density of concrete;

[0060] g is the acceleration due to gravity.

[0061] The present embodiment provides a construction method for measuring the height of poured concrete for underground continuous walls, which can effectively solve the problem that the height of the top surface of concrete is difficult to measure accurately during the pouring of concrete for underground continuous walls, especially for drop-hanging underground continuous walls. By using a pressure sensor 1 to assist in measuring the height of the top surface of concrete, the measurement result is more accurate, and the top surface height can be monitored in real time, so that the top surface height can be accurately measured and controlled, thereby avoiding waste of concrete materials caused by excessive over-pouring of concrete due to inaccurate measurement, and the normal construction period will not be affected by chiseling out the over-pouring concrete.

[0062] Furthermore, the construction method for measuring the height of poured concrete of an underground continuous wall provided in this embodiment is relatively quick and convenient in actual operation, has a wide range of applications, and has good engineering application prospects.

[0063] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A construction method for measuring the height of underground continuous wall concrete pouring, characterized in that: The specific steps include: S1. Place a steel cage equipped with a pressure sensor in a slot section of a continuous wall, wherein the pressure sensor is connected to a ground control console via a wired or wireless connection. S2. Before pouring concrete for the underground continuous wall, the ground control console measures the initial value of the electrical signal through the pressure sensor; S3, the ground control console calculates the pressure at the location of the pressure sensor based on the trench depth and mud density of the underground continuous wall, and combines the initial value of the electrical signal measured in step S2 to obtain a conversion relationship between the electrical signal of the pressure sensor and the pressure; S4. During the pouring of concrete for the underground continuous wall, the ground control console measures real-time pressure data through a pressure sensor, and then calculates the data of the height of the concrete top surface.

2. The construction method for measuring the height of underground continuous wall concrete pouring according to claim 1, characterized in that: In step S1, the pressure sensor is installed on or near the top of the steel cage.

3. The construction method for measuring the height of underground continuous wall concrete pouring according to claim 1, characterized in that: In step S1, the pressure sensor is connected to the ground control console via a data line, and the data line is laid and fixed along the reinforcement cage suspension bars.

4. The construction method for measuring the height of underground continuous wall concrete pouring according to claim 1, characterized in that: The pressure sensor converts the detected pressure value into a 4-20mA electrical signal output and transmits it remotely to the ground control console via a data line.

5. The construction method for measuring the height of underground continuous wall concrete pouring according to claim 1, characterized in that: There are multiple pressure sensors on the steel cage, and the ground control console obtains the average value of the electrical signals of the multiple pressure sensors as calculation data.

6. The construction method for measuring the height of underground continuous wall concrete pouring according to claim 1, characterized in that: In step S4, the pressure sensor measures real-time pressure data, specifically: The pressure sensor transmits the measured electrical signal to the ground control console, which calculates the corresponding pressure data based on the conversion relationship between the pressure sensor electrical signal and pressure.

7. The construction method for measuring the height of underground continuous wall concrete pouring according to claim 1, characterized in that: In step S4, the calculation formula of the concrete top surface height data h2 is: h2=H-h1; Where H is the trench depth of the underground continuous wall; h1 is the height between the concrete liquid level and the bottom of the groove section of the diaphragm wall.

8. The construction method for measuring the height of underground continuous wall concrete pouring according to claim 7, characterized in that: The calculation formula for the height h1 between the concrete liquid level and the bottom of the trough section of the continuous wall is: h1=P / ρg; Wherein, P is the pressure data measured by the pressure sensor; ρ is the density of concrete; g is the acceleration due to gravity.

9. The construction method for measuring the height of underground continuous wall concrete pouring according to claim 1, characterized in that: The ground control console is provided with an interactive display and an alarm. The interactive display is used to display the height value of the concrete top surface. The alarm is used to issue an alarm when the measured height value of the concrete top surface reaches a preset value.

10. The construction method for measuring the height of underground continuous wall concrete pouring according to claim 1, characterized in that: In step S4, concrete is poured into the trough section of the continuous wall through the hopper, and the bottom of the conveying pipe of the hopper is close to the bottom of the trough section of the continuous wall.

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