Automatic in-situ specific gravity detection method for grooving slurry of underground diaphragm wall

Abstract

The invention relates to an automatic in-situ specific gravity detection method for grooving slurry of an underground diaphragm wall, which comprises the following steps: connecting a pressure sensor with a lead and a data line to form a pressure detection belt, sinking the pressure detection belt into a groove section of the underground diaphragm wall, and detecting the pressure of slurry at different depths in the groove section after the pressure detection belt is stable. Slurry pressure data are collected at fixed time intervals and synchronously transmitted to a ground data collection system, according to the collected slurry pressure data, a curve that the slurry pressure changes along with the depth at different time is generated in real time, and finally the slurry specific gravity at different depths and the situation that the slurry specific gravity changes along with the time at the same depth position are obtained. According to the method, the traditional mode that slurry of different depths is collected through a slurry barrel and then the slurry of the groove section is manually detected on the ground is avoided, the specific gravity of the slurry of different depths in the groove section of the underground diaphragm wall is rapidly and conveniently obtained through an automatic in-situ detection means, the labor cost and the detection error are reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of underground continuous wall construction, and in particular to an automated in-situ specific gravity detection method for underground continuous wall trenching mud. Background Art

[0002] With the in-depth development of urban construction, the demand for deep foundation pit projects is growing. Underground continuous wall technology has been widely favored due to its excellent support performance, and its application field continues to expand. In the implementation of this technology, the quality of the trenching mud has become a decisive factor affecting the trench wall protection effect. The mud not only shoulders the important task of maintaining the stability of the trench wall and preventing soil collapse, but its performance is also directly related to construction safety and the final structural quality of the wall. However, in the traditional construction process, the detection of mud performance depends on manual sampling in the trench section. This process is not only inefficient, but also limited by the detection frequency. It is often difficult to fully evaluate the mud state at different depths in the same trench section, resulting in blind spots in the grasp of mud performance, which in turn affects the refined management of construction and the quality of the wall. In order to solve this challenge, it is urgent to develop a method that can quickly detect the mud performance indicators at different depths in the trench section. The method should be able to achieve continuous and comprehensive detection of mud specific gravity parameters, thereby providing data support for the dynamic adjustment of mud proportions and optimization of the construction process. Summary of the invention

[0003] The purpose of the present invention is to provide an automated in-situ specific gravity detection method for underground continuous wall trenching mud, so as to solve the above-mentioned problem of comprehensive and rapid detection of mud specific gravity in the trench section.

[0004] In order to achieve the above construction purpose, the present invention adopts the following scheme:

[0005] An automated in-situ specific gravity detection method for underground continuous wall trenching mud, which connects pressure sensors with wires and data cables to form a pressure detection belt, and the pressure sensors are evenly arranged on the pressure detection belt. The pressure detection belt is sunk into the underground continuous wall trench section, and after the pressure detection belt is stabilized, the mud pressures at different depths in the trench section are detected, and mud pressure data are collected at fixed intervals and synchronously transmitted to a ground data acquisition system. According to the collected mud pressure data, a curve of the change of mud pressure with depth at different times is generated in real time, and finally the mud specific gravity at different depths and the change of mud specific gravity with time at the same depth are obtained.

[0006] Furthermore, the pressure detection belt is formed into a belt-shaped pressure detection device by connecting pressure sensors in parallel with wires and data lines. The belt has a scale and sinks to a length corresponding to the depth of the trench section. The pressure sensors are evenly arranged on the detection belt at a certain interval according to the soil conditions at the depth of the trench section. The range of the pressure sensor is estimated to be 1 times the maximum mud pressure.

[0007] Furthermore, after the pressure detection belt sinks and stabilizes, mud pressure detection is carried out at different depths. The position of the pressure detection belt is fixed and there is no need to lift or slide it down. The pressure is read by pressure sensors at each point and the data is transmitted to the ground data acquisition system via the pressure detection belt data line for display and calculation.

[0008] Furthermore, mud pressure data was collected at fixed intervals and measured every 5 minutes for 30 minutes to obtain the change of mud pressure at the same depth, so as to infer the change of mud density over time at the same depth.

[0009] Furthermore, the data acquisition system plots scattered data on the relationship between depth and mud pressure, fits the scattered data, and obtains an exponential curve or a piecewise curve of the mud pressure distribution at the depth of the underground continuous wall trench section. Finally, the proportion of each point is calculated from the slope of the exponential curve or the piecewise curve, thereby obtaining the proportion distribution of the entire trench section of the ground wall.

[0010] The beneficial effects of the present invention are:

[0011] The present invention proposes an automated in-situ specific gravity detection method for underground continuous wall trenching mud. By adopting a pressure belt equipped with a high-precision pressure sensor, the mud specific gravity detection is automated and automatic, which greatly improves the detection efficiency, solves the problems of low efficiency and long time consumption of traditional manual detection, reduces dependence on manpower, reduces construction costs, and also reduces the additional construction costs and potential safety risks caused by manual detection errors, thereby achieving dual guarantees of economic benefits and construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a flow chart of the automated in-situ specific gravity detection method for underground continuous wall trenching mud of the present invention;

[0013] Figure 2 It is a schematic diagram of an automated in-situ specific gravity detection method for underground continuous wall trenching mud of the present invention;

[0014] In the figure: 1 pressure belt, 2 pressure sensor, 3 operating system. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. These embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the contents taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0016] like Figure 1, as shown in FIG2 , an automated in-situ specific gravity detection method for underground continuous wall trenching mud of the present invention comprises the following specific steps:

[0017] Step 1: Select a pressure belt 1 that is 500mm to 1000mm longer than the trench depth, and evenly arrange pressure sensors 2 on the pressure belt 1, with an interval of 1m to 2m in the key detection area and 2m to 4m in the non-key detection area. After the arrangement is completed, sink the pressure belt 1 into the underground continuous wall trench section;

[0018] Step 2: After the pressure belt 1 is sunk to the appropriate position, the mud pressure at different depths is tested every 5 minutes;

[0019] Step 3: The collected mud pressure data is synchronized to the ground operating system 3 in real time through wired transmission technology;

[0020] Step 4: Based on the collected mud pressure data, the operating system 3 automatically generates a curve showing the change of mud pressure with depth at different time points;

[0021] Step 5: By analyzing the curve of mud pressure changing with depth, combined with geological data and construction parameters, the mud density at different depths and the change of mud density with time at the same depth can be calculated.

[0022] Preferably, the pressure detection belt is a belt-shaped pressure detection device formed by connecting pressure sensors in parallel with wires and data lines. The belt has a scale and sinks to a length corresponding to the depth of the trench section. The pressure sensors are evenly arranged on the detection belt at a certain interval according to the soil conditions at the depth of the trench section, and the range of the pressure sensor is estimated to be 1 times the maximum mud pressure.

[0023] Preferably, after the pressure detection belt has sunk and stabilized, mud pressure detection is carried out at different depths. The pressure detection belt is fixed in position and does not need to be lifted or slid down. The pressure is read by pressure sensors at each point and the data is transmitted to the ground data acquisition system via the pressure detection belt data line for display and calculation.

[0024] Preferably, the mud pressure data is collected at fixed intervals and measured every 5 minutes for 30 minutes to obtain the change of mud pressure at the same depth, so as to infer the change of mud density over time at the same depth.

[0025] Preferably, the data acquisition system plots scattered data on the relationship between depth and mud pressure, fits the scattered data, obtains an exponential curve or a piecewise curve of the mud pressure distribution at the depth of the underground continuous wall trench section, and finally obtains the weight of each point from the slope calculation value of the exponential curve or the piecewise curve, thereby obtaining the weight distribution of the entire trench section of the ground wall.

Claims

1. An automated in-situ specific gravity detection method for underground continuous wall trenching mud, characterized in that: The pressure sensors are connected with wires and data cables to form a pressure detection belt, and the pressure sensors are evenly arranged on the pressure detection belt. The pressure detection belt is sunk into the underground continuous wall groove section. After the pressure detection belt is stable, the mud pressure at different depths in the groove section is detected. The mud pressure data is collected at fixed intervals and synchronously transmitted to the ground data acquisition system. According to the collected mud pressure data, a curve of the mud pressure changing with depth at different times is generated in real time. Finally, the mud specific gravity at different depths and the change of mud specific gravity with time at the same depth are obtained.

2. The automated in-situ specific gravity detection method for underground continuous wall trenching slurry according to claim 1, characterized in that: The pressure detection belt is a belt-shaped pressure detection device formed by connecting pressure sensors in parallel with wires and data cables. It has a scale and sinks to a length corresponding to the depth of the trench section. The pressure sensors are evenly arranged on the detection belt at a certain interval according to the soil conditions at the depth of the trench section. The range of the pressure sensor is estimated to be 1 times the maximum mud pressure.

3. The automated in-situ specific gravity detection method for underground continuous wall trenching mud according to claim 1, characterized in that: After the pressure detection belt sinks and stabilizes, mud pressure detection is carried out at different depths. The pressure detection belt is fixed in place and does not need to be lifted or slid down. The pressure is read by pressure sensors at each point and the data is transmitted to the ground data acquisition system via the pressure detection belt data line for display and calculation.

4. The automated in-situ specific gravity detection method for underground continuous wall trenching mud according to claim 1, characterized in that: The mud pressure data was collected at fixed intervals and measured every 5 minutes for 30 minutes to obtain the change of mud pressure at the same depth, so as to infer the change of mud density over time at the same depth.

5. The automated in-situ specific gravity detection method for underground continuous wall trenching slurry according to claim 1, characterized in that: The data acquisition system plots the scattered data of the relationship between depth and mud pressure, fits the scattered data, and obtains the exponential curve or piecewise curve of the mud pressure distribution at the depth of the underground continuous wall trench section. Finally, the proportion of each point is calculated from the slope of the exponential curve or piecewise curve, thereby obtaining the proportion distribution of the entire trench section of the ground wall.

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