Pore water pressure monitoring pipe

Abstract

A pore water pressure monitoring pipe comprises a filtering mechanism and a precipitation assembly connected to the lower portion of the filtering mechanism, and the filtering mechanism comprises an outer filtering assembly, an inner filtering assembly connected to the interior of the outer filtering assembly and a filtering layer arranged between the outer filtering assembly and the inner filtering assembly. And a monitoring probe for measuring pore water pressure is connected in the inner filtering assembly. The outer filtering assembly and the inner filtering assembly are both water filtering pipes, and filtering holes of the inner filtering assembly are smaller than filtering holes of the outer filtering assembly. The outer side part of the outer filtering assembly is sleeved with a connecting pipe, and the connecting pipe is connected with the precipitation assembly. The precipitation assembly comprises a precipitation pipe, the precipitation pipe is connected with the connecting pipe, and the precipitation pipe is used for precipitation of filtered impurities. The pore water pressure monitoring pipe provided by the utility model can filter impurities in underground pore water and realize monitoring of pore water pressure, so that the measurement accuracy is improved, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ground subsidence monitoring water pressure devices, and in particular relates to a pore water pressure monitoring pipe. Background Art

[0002] Land subsidence is an urban geological disaster that most plain cities have already faced or have potential hidden dangers. The main reason for its occurrence is that the urbanization process is accelerated, and economic construction and people's lives require the exploitation of a large amount of groundwater and the development and construction of large-scale buildings, which directly leads to a decrease in the bearing capacity of the stratum that supports the balance of ground forces. Land subsidence has the characteristics of long duration, large impact range, and great difficulty in prevention and control. Land subsidence is mainly caused by excessive exploitation of deep-layer confined water, which leads to a decrease in groundwater levels. Years of monitoring results have shown that land subsidence mainly occurs in clay layers, the groundwater level decreases, the pore water pressure decreases, and the effective stress increases. The clay layer is compressed under the action of the continuous increase in effective stress. Monitoring the changes in the pore water pressure of the clay layer can effectively observe and prevent land subsidence.

[0003] In the prior art, underground pore water pressure is usually monitored by a monitoring probe, which is placed underground to monitor the water pressure at the corresponding position. Since groundwater usually contains many impurities, the monitoring probe is easily affected by the impurities, which reduces the accuracy of the measurement. Therefore, a device that can filter the pore water is needed. The utility model solves this technical problem. Utility Model Content

[0004] The utility model provides a pore water pressure monitoring pipe, which can filter out impurities in underground pore water and realize the monitoring of pore water pressure, thereby improving the accuracy of measurement and the practicability of the device.

[0005] A pore water pressure monitoring pipe comprises a filtering mechanism and a sedimentation component connected below the filtering mechanism, wherein the filtering mechanism comprises an outer filtering component, an inner filtering component connected inside the outer filtering component, and a filtering layer arranged between the outer filtering component and the inner filtering component, wherein a monitoring probe for measuring pore water pressure is connected inside the inner filtering component.

[0006] Furthermore, the outer filter component and the inner filter component are both water filter pipes, and the filter holes of the inner filter component are smaller than the filter holes of the outer filter component.

[0007] Furthermore, a connecting pipe is sleeved on the outer side of the outer filtering component, and the connecting pipe is connected to the sedimentation component.

[0008] Furthermore, the sedimentation component includes a sedimentation pipe, which is connected to the connecting pipe and is used for settling impurities after filtration.

[0009] Furthermore, a centralizer is connected to the outer side of the sedimentation tube, and the centralizer is used to maintain the stability of the device.

[0010] Furthermore, the filter layer is filled with granular materials for filtering impurities.

[0011] The technical effects of the utility model are as follows:

[0012] (1) This solution uses a filtering mechanism to perform multi-stage filtration on pore water to filter out impurities in the water. The filtered impurities will settle into the sedimentation component and continue to sink to avoid affecting the monitoring probe. In this way, the monitoring probe is prevented from contacting with impurities in the water, thereby improving the measurement accuracy of the monitoring probe;

[0013] (2) The sedimentation tube can settle the impurities inside and keep them away from the monitoring probe above. The outer side of the sedimentation tube is connected to a stabilizer to keep the device stable. In addition, since the sedimentation tube is connected to the connecting pipe, and the connecting pipe is connected to the filter assembly above, the device forms an integrated structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the utility model.

[0015] The accompanying drawings are as follows: 1. inner filter assembly; 2. filter layer; 3. outer filter assembly; 4. connecting pipe; 5. sedimentation pipe; 6. centralizer. DETAILED DESCRIPTION

[0016] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments and drawings.

[0017] join Figure 1 A pore water pressure monitoring pipe includes a filter mechanism and a sedimentation component connected below the filter mechanism. The filter mechanism includes an outer filter component 3, an inner filter component 1 connected inside the outer filter component 3, and a filter layer 2 arranged between the outer filter component 3 and the inner filter component 1. A monitoring probe for measuring pore water pressure is connected inside the inner filter component 1. The monitoring probe in this embodiment is an integrated multi-parameter water quality analyzer, which can also be replaced with other types of monitoring probes according to actual needs.

[0018] Further, both the outer filter assembly 3 and the inner filter assembly 1 are water filter pipes, and the filter holes of the inner filter assembly 1 are smaller than the filter holes of the outer filter assembly 3. Preferably, the water filter pipe in this embodiment adopts a wire-wrapped water filter pipe, and other water filter pipes capable of filtering can also be adopted according to actual needs.

[0019] Furthermore, the outer side of the outer filter assembly 3 is sleeved with a connecting pipe 4, and the connecting pipe 4 is connected to the sedimentation assembly. The connecting pipe 4 in this embodiment is connected below the outer filter assembly 3.

[0020] Furthermore, the sedimentation assembly includes a sedimentation pipe 5, which is connected to the connecting pipe 4, and is used for settling the impurities after filtration. The length of the sedimentation pipe 5 in this embodiment is greater than the length of the outer filter assembly 3 and the inner filter assembly 1, so as to make the impurities further away from the monitoring probe, and the connecting pipe 4 is connected to the upper part of the sedimentation pipe 5.

[0021] Furthermore, the outer side of the sedimentation pipe 5 is connected with a centralizer 6, which is used to maintain the stability of the device. The staff can select a centralizer 6 with a suitable structure according to actual needs.

[0022] Furthermore, the filter layer 2 is filled with granular materials for filtering impurities. According to actual needs, granular materials can also be added to the inner filter component 1 for further filtering.

[0023] The working process of the utility model is as follows:

[0024] First, the ground part to be monitored is drilled, and then the device is placed in the well. The stabilizer 6 will contact the soil part, thereby playing a role in straightening the device. The monitoring probe is located in the inner filter component 1, and data transmission is achieved through the wire;

[0025] The underground pore water will first pass through the outermost outer filter component 3, and the larger impurities will be filtered through the outer filter component 3. The water entering the outer filter component 3 will be further filtered when passing through the granular material, and finally pass through the filter holes on the inner filter component 1 to complete the filtration work. The filtered impurities will sink under the influence of their own gravity, fall into the sedimentation tube 5 and continue to settle. In this way, the lower part of the interior of the device can be precipitated with impurities, and the upper part of the impurity precipitation can be water, so that the pore water pressure can be monitored through the monitoring probe.

[0026] The above embodiments are only preferred embodiments of the present utility model. Those skilled in the art can obtain other embodiments from the above embodiments without creative work. Therefore, this application protects not only the above embodiments, but also the scope consistent with the principles and features of this application.

Claims

1. A pore water pressure monitoring pipe, characterized in that, It includes a filtering mechanism and a precipitation component connected below the filtering mechanism. The filtering mechanism includes an outer filtering component (3), an inner filtering component (1) connected inside the outer filtering component (3), and a filtering layer (2) arranged between the outer filtering component (3) and the inner filtering component (1). A monitoring probe for measuring pore water pressure is connected inside the inner filtering component (1).

2. The pore water pressure monitoring tube according to claim 1, characterized in that, Both the outer filtering component (3) and the inner filtering component (1) are filter pipes, and the filter holes of the inner filtering component (1) are smaller than those of the outer filtering component (3).

3. The pore water pressure monitoring pipe according to claim 1, characterized in that, A connecting pipe (4) is sleeved on the outer side of the outer filtering component (3), and the connecting pipe (4) is connected to the precipitation component.

4. The pore water pressure monitoring pipe according to claim 3, characterized in that, The precipitation component includes a precipitation pipe (5). The precipitation pipe (5) is connected to the connecting pipe (4), and the precipitation pipe (5) is used for the sedimentation of impurities after filtration.

5. The pore water pressure monitoring pipe according to claim 4, characterized in that, A centralizer (6) is connected to the outer side of the precipitation pipe (5), and the centralizer (6) is used to keep the device stable.

6. The pore water pressure monitoring pipe according to claim 1, characterized in that, The filtering layer (2) is filled with granular materials for filtering impurities.

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