Anti-freezing soil settlement monitoring rod device

Abstract

The invention provides an anti-freezing soil settlement monitoring rod device, which is characterized in that a hole is drilled on the ground of a settlement monitoring point, a liner tube is sleeved in the drilled hole, a monitoring rod is placed in the liner tube, the monitoring rod comprises a base and a vertical rod, the vertical rod is fixed at the center of the base, the upper end of the vertical rod extends to the ground, and a level gauge digital bar code ruler is fixed at the end part of the vertical rod on the ground. Monitoring the digital bar code ruler of the level gauge through the level gauge to obtain settlement data; a heat preservation layer is laid on the ground with the monitoring rod as the center. According to the anti-freezing soil settlement monitoring rod device, a multi-layer heat preservation structure is adopted, soil can be prevented from being frozen in winter, the natural humidity of the soil around the monitoring rod can be kept to a certain degree, the anti-freezing soil settlement monitoring rod device is especially important for monitoring settlement of collapsible loess, and the anti-freezing soil settlement monitoring rod device can be used for monitoring settlement of collapsible loess by maintaining a relatively stable environment close to the natural state. And the reliability and effectiveness of monitoring data can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of soil settlement monitoring, and in particular to a frost-resistant soil settlement monitoring rod device. Background Art

[0002] Soil settlement monitoring is an important engineering activity used to track and record the vertical displacement of foundations or soil over time, which is essential for assessing the stability and safety of structures. The purpose of soil settlement monitoring is to ensure the stability of the foundations of structures such as buildings, bridges, dams, roads, etc., to avoid structural damage caused by settlement; to monitor potential geological disasters such as ground settlement, landslides, earthquakes and other geological activities caused by ground displacement; during the construction process, monitor the impact of activities such as filling and excavation on the surrounding environment to control the settlement rate; monitor ground settlement caused by activities such as groundwater extraction and mineral mining to prevent environmental damage.

[0003] The principle of soil settlement monitoring is to evaluate the settlement by measuring the elevation changes of specific points on the ground or buildings, setting a stable benchmark point as a reference, and comparing the elevation difference between the monitoring point and the benchmark point.

[0004] Currently, the more commonly used method of soil settlement monitoring is to use soil settlement monitoring rods. Soil settlement monitoring rods are devices specially designed to measure soil layered settlement. When soil settlement occurs, the soil settlement monitoring rods will sink with the soil. The amount of soil settlement can be reflected by comparing the relative displacement changes of the soil settlement monitoring rods.

[0005] The soil settlement monitoring rod consists of an inner tube and an outer tube. The inner tube is used to measure the shrinkage deformation of each layer of soil. It is connected to the predetermined length by a galvanized steel pipe with a diameter of 25mm. The base of the inner tube is a circular steel plate with a thickness of 3mm and φ90mm vertically welded to the steel pipe. The length of the inner tube of each deep mark is 2.5m higher than the corresponding drilling depth, that is, the inner tube is exposed 2.0m outside the test pit. The outer tube of the deep mark is a PVC tube with a negligible weight and a diameter of 50mm. Its function is to prevent the inner tube from contacting the soil when it moves. When the soil layer at the bottom plate settles, it is directly displayed by the sinking of the inner tube.

[0006] However, the temperature in the north is low during winter operations, and cold air rushes in from the surface of the monitoring poles, which can easily cause the soil to freeze, making it difficult to obtain effective settlement data. Summary of the invention

[0007] Aiming at the problem that soil is easy to freeze in northern winter and effective settlement data is difficult to obtain, the present invention provides a freezing-resistant soil settlement monitoring rod device.

[0008] The solution adopted by the present invention to solve its technical problems is: a frost-resistant soil settlement monitoring rod device, a hole is drilled on the ground at the settlement monitoring point, a liner is inserted into the drilled hole, and a monitoring rod is placed in the liner, the monitoring rod comprises a base and a vertical pole, a vertical pole is fixed at the center of the base, the upper end of the vertical pole extends to the ground, a level digital barcode ruler is fixed to the end of the vertical pole on the ground, and the settlement data is obtained by remotely monitoring the level digital barcode ruler through the level; an insulation layer is laid on the ground with the monitoring pole as the center.

[0009] Furthermore, the liner is a composite tube, a sealed cavity is provided on the side wall of the liner, and a heating unit is installed in the sealed cavity; a water inlet and a water outlet are also provided on the sealed cavity, water is filled into the sealed cavity through the water inlet and outlet, and the water in the sealed cavity is heated by the heating unit.

[0010] Furthermore, a heat preservation cover is installed at the upper end of the liner, and the heat preservation cover is buckled on the liner protruding from the ground. A through hole is provided in the middle of the heat preservation cover, and the vertical pole passes through the through hole and protrudes out of the heat preservation cover. A guide tube is provided in the through hole of the heat preservation cover, and the inner diameter of the guide tube is larger than the width of the vertical pole, and the outer diameter of the guide tube is smaller than the inner diameter of the liner. The lower end of the heat preservation cover is extended outward to be provided with an outer eaves, and the heat preservation layer is laid on the outer eaves near the liner.

[0011] Furthermore, a water circulation pipe is laid on the ground outside the liner, and the water circulation pipe includes an inlet pipe and an outlet pipe. The inlet pipe is connected to the water inlet of the liner sealing cavity, and the outlet pipe is connected to the water outlet of the liner sealing cavity, wherein the outlet pipe surrounds the liner and is laid on the ground around the liner.

[0012] Furthermore, the insulation cover is a rectangular frame structure of 35 cm in length, width and 15 cm in height built with steel bars. The insulation layer is laid on the ground outside the insulation cover, and the insulation layer wraps the outside of the rectangular frame structure. The perforation in the middle of the insulation cover penetrates the insulation layer.

[0013] Beneficial effects of the present invention: The antifreeze soil settlement monitoring rod device of the present invention adopts a multi-layer insulation structure, which can not only prevent the soil from freezing in winter, but also maintain the natural humidity of the soil around the monitoring rod to a certain extent, which is especially important for monitoring the settlement of collapsible loess. By maintaining a relatively stable and close to natural environment, the reliability and effectiveness of the monitoring data can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the layout structure of the water circulation pipe of the present invention.

[0016] Figure 3 yes Figure 1 Enlarged view of part A in the middle. Numbers in the figure: ground 1, liner 2, settlement pole 3, settlement base 4, heating unit 5, water circulation pipe 6, insulation layer 7, insulation cover 8, level digital barcode ruler 9, sealed chamber 201, guide tube 801, displacement sensor 202, mark 301. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below.

[0018] Example 1: It is cold in the northern region in winter. When performing settlement monitoring operations, after the settlement monitoring hole is dug, cold air will flow into the settlement monitoring hole, causing the soil layer in the settlement monitoring hole to be frozen. The frozen soil layer has a higher hardness than the ordinary soil layer. Under the same conditions, the frozen soil layer can withstand stronger pressure than the ordinary state, which will cause errors in the settlement monitoring data, making it impossible to obtain accurate settlement data, which will bring hidden dangers to subsequent construction.

[0019] like Figure 1 As shown, the present invention provides a frost-resistant soil settlement monitoring rod device, which includes a liner 2 and a monitoring rod placed in the liner 2. A settlement monitoring hole is dug on the ground 1 of the settlement monitoring point using a drilling device, and the liner 2 is inserted into the borehole. In order to facilitate the installation of the liner 2, the size of the borehole is larger than the diameter of the liner 2. The liner 2 is inserted into the borehole, and the soil layer between the borehole and the liner 2 is backfilled and compacted.

[0020] A monitoring rod can be placed on the liner 2, and the monitoring rod includes a settlement base 4 and a settlement pole 3. The settlement base 4 is supported by a heavy metal disc with a thickness of 3mm and φ90mm. The settlement pole 3 is installed in the center of the metal disc. Specifically, the settlement pole 3 can be a solid metal rod, or a galvanized steel pipe with a diameter of 25mm threadedly connected to a predetermined length. The settlement pole 3 can be welded to the settlement base 4, or an internal thread can be set in the galvanized steel pipe, and a fixed threaded column is set in the center of the settlement base 4, and the internal thread of the galvanized steel pipe is screwed on the threaded column, so that the settlement base 4 and the settlement pole 3 are connected and installed together. The advantage of installing the settlement pole 3 and the settlement base 4 by threaded connection is that the settlement pole 3 and the settlement base 4 can be disassembled, which is convenient for storage when not in use.

[0021] A digital bar code ruler 9 of a level is fixed on the upper end of the vertical pole. The level is placed on the observation route to ensure that the instrument is in a horizontal state and aligned with the digital bar code ruler. The level automatically recognizes the bar code and displays the elevation data in digital form and records these data. Repeat the above steps according to the set cycle, such as weekly or monthly, to obtain the elevation data at different time points, and calculate the settlement by comparing the elevation data of the same observation point at different time points. The settlement curve can also be drawn using software to intuitively display the settlement trend and rate.

[0022] An insulation layer 7 is laid on the ground 1 around the soil settlement monitoring rod device. The innermost layer of the insulation layer 7 usually uses insulation cotton, which can provide good thermal insulation effect, prevent the external cold air from directly contacting the soil around the monitoring rod, and reduce heat loss. The selection of insulation cotton should take into account its thermal insulation performance and durability. On top of the insulation cotton, a layer of plastic cloth is laid as a waterproof isolation layer. This layer of material can prevent moisture from penetrating into the insulation cotton and keep the insulation cotton dry, because moisture will greatly reduce the insulation effect of the insulation cotton. The outermost layer is a compacted soil layer, which can further isolate the external cold air while ensuring the stability of the entire insulation device. The thickness and compaction degree of the soil layer must be sufficient to resist the effects of wind and other external forces to prevent the insulation layer 7 from being damaged.

[0023] The multi-layer insulation structure can not only prevent the soil from freezing in winter, but also maintain the natural humidity of the soil around the monitoring pole to a certain extent, which is especially important for monitoring the settlement of collapsible loess. By maintaining a relatively stable and close-to-natural environment, the reliability and effectiveness of the monitoring data can be ensured.

[0024] Embodiment 2: The soil layer temperature is low in winter, and the soil layer settlement is lower than that in summer. In order to further make winter monitoring close to summer settlement, the soil layer needs to be able to maintain a high level. Therefore, in this embodiment, the liner 2 is further set as a composite pipe, and the pipe wall of the composite liner 2 is provided with a sealed cavity 201, and a heating unit 5 is installed in the sealed cavity 201. The heating unit 5 is an electric heating wire spirally arranged around the liner 2, and the electric heating wire is spirally wound and installed in the sealed cavity. A water inlet and a water outlet are set on the sealed cavity 201 of the liner 2, wherein the water inlet is set at a lower position of the liner 2, and the water outlet is set at an upper position of the liner 2. Water is poured and circulated in the sealed cavity 201 through the water inlet and outlet, and the water in the sealed cavity 201 is heated by the heating unit 5. The temperature in the deep soil layer is relatively high, and the temperature in the shallow soil layer is relatively low. By setting the height of the water inlet and the water outlet, the temperature of the soil layer can be made more balanced, which is convenient for monitoring the settlement of the soil layer.

[0025] A water circulation pipe 6 is laid on the ground 1 outside the liner 2, and the water circulation pipe 6 includes an inlet pipe and an outlet pipe. The inlet pipe is connected to the water inlet of the sealed cavity 201 of the liner 2, and the outlet pipe is connected to the water outlet of the sealed cavity 201 of the liner 2, wherein the outlet pipe surrounds the liner 2 and is laid on the ground 1 around the liner 2.

[0026] like Figure 2 As shown, a water circulation pipe 6 is laid on the ground 1 around the liner 2, and the pipe system consists of an inlet pipe and an outlet pipe. The inlet pipe is connected to the water inlet of the sealed cavity 201 of the liner 2, and is used to transport preheated water into the sealed cavity 201; while the outlet pipe is connected to the water outlet of the sealed cavity 201, and is used to guide the heated water to the external circulation system. The outlet pipe is designed to be laid on the ground 1 around the liner 2, and the hot water flowing out of the sealed cavity 201 of the liner 2 is used to further heat the surrounding soil layer. The hot water releases heat during the circulation process, which helps to increase the temperature of the soil layer, especially in the area around the liner 2, thereby forming a relatively warm "thermal ring" to ensure the temperature of the monitoring device and the surrounding soil layer is stable.

[0027] The water circulation system is usually also equipped with a circulation pump to promote the flow of water in the pipe system. In addition, a temperature sensor and a controller should be set to monitor the temperature of the soil layer and the water circulation pipe 6 in real time, and automatically adjust the power of the heating unit 5 and the speed of the circulation pump according to the set temperature threshold to maintain the ideal heating effect.

[0028] At the same time, renewable energy such as solar energy and geothermal energy are used to power the heating system. By laying a water circulation pipe 6 at the bottom of the outer side of the liner 2 and combining it with the heating unit 5 inside the liner 2, a complete heating system can be formed to effectively resist the influence of low temperature in winter on soil settlement monitoring and ensure the accuracy and reliability of monitoring data. At the same time, the surrounding water outlet pipe can further expand the heating range, improve the temperature distribution of the soil layer, and create a more stable working environment for the monitoring device.

[0029] Example 3: Figure 1 As shown, a heat preservation cover 8 is installed at the upper end of the liner 2, and the heat preservation cover 8 is buckled on the liner 2 protruding from the ground 1. The part of the liner 2 protruding from the ground is covered by a special heat preservation cover 8 to prevent heat from being lost from the top and protect the monitoring device from the influence of bad weather.

[0030] The heat-insulating cover 8 can be made of materials with good heat-insulating properties, such as polyurethane foam, rock wool board, etc. These materials not only have good heat-insulating effects, but are also light in weight and easy to install and maintain.

[0031] A through hole is provided at the center of the heat preservation cover 8, and the vertical rod passes through the through hole and extends outside the heat preservation cover 8. In order to reduce friction and wear, a guide tube 801 is installed in the through hole, and the inner diameter of the guide tube 801 is slightly larger than the diameter of the vertical rod, ensuring that the vertical rod can move freely. At the same time, the outer diameter of the guide tube 801 is smaller than the inner diameter of the bushing, ensuring the sealing between the heat preservation cover 8 and the liner 2.

[0032] The lower end of the heat preservation cover 8 extends outward to form an outer eave. This design can prevent rain or snow from falling directly on the liner 2, reducing the risk of moisture infiltration. It can also provide additional shielding to prevent local excessive temperatures caused by direct sunlight.

[0033] The portion of the thermal insulation layer 7 close to the liner 2 is laid on the outer edge of the thermal insulation cover 8 to form a continuous thermal insulation barrier, which minimizes heat loss and protects the monitoring device from the influence of the external environment.

[0034] The heat preservation cover 8 can not only effectively reduce the heat loss from the top of the liner 2 and maintain the temperature of the inside of the liner 2 and the surrounding soil layer, but also provide additional protection to ensure the normal operation of the monitoring device under adverse weather conditions and improve the accuracy and reliability of the monitoring data. At the same time, the reasonable design of the guide tube 801 ensures the free movement of the pole, and the normal operation of the monitoring pole will not be affected by the heat preservation measures.

[0035] The insulation cover 8 can also use a rectangular frame structure with a length, width and height of 35 cm and 15 cm built with steel bars. The insulation layer 7 is laid on the ground 1 outside the insulation cover 8, and the insulation layer 7 wraps the outside of the rectangular frame structure. The perforation in the middle of the insulation cover 8 penetrates the insulation layer 7.

[0036] Example 4: Figure 1 and Figure 3 As shown, a displacement sensor 202 is also installed on the inner side of the liner 2, and a corresponding mark 301 is set on the settlement pole 3. The displacement sensor 202 and the mark 301 are used to detect and record the data of the pole settlement. A data transmission module and an alarm module are also installed in the liner 2. The settlement data detected by the displacement sensor 202 can be transmitted to the background through the data transmission module, and when the settlement data is abnormal, the alarm module can make corresponding reminders in time.

[0037] The displacement sensor 202 is a photoelectric displacement sensor 202, and the mark 301 is a grating, which measures the displacement of the settlement pole 3 through the change of the optical signal.

[0038] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A frost-resistant soil settlement monitoring rod device, characterized in that: A hole is drilled on the ground (1) at a settlement monitoring point, a liner (2) is inserted into the hole, a monitoring rod is placed in the liner (2), the monitoring rod comprises a base and a vertical rod, a vertical vertical rod is fixed at the center of the base, the upper end of the vertical rod extends to the ground (1), a level digital barcode ruler (9) is fixed at the end of the vertical rod on the ground (1), and settlement data is obtained by remotely monitoring the level digital barcode ruler (9) through the level; an insulation layer (7) is laid on the ground (1) with the monitoring rod as the center.

2. The frost-resistant soil settlement monitoring rod device according to claim 1, characterized in that: The liner pipe (2) is a composite pipe, and a sealed cavity (201) is provided on the side wall of the liner pipe (2), and a heating unit (5) is installed in the sealed cavity (201); a water inlet and a water outlet are also provided on the sealed cavity (201), water is poured into the sealed cavity (201) through the water inlet and outlet, and the water in the sealed cavity (201) is heated by the heating unit (5).

3. The frost-resistant soil settlement monitoring rod device according to claim 1, characterized in that: A heat-insulating cover (8) is installed at the upper end of the liner (2), and the heat-insulating cover (8) is buckled on the liner (2) protruding from the ground (1). A through hole is provided in the middle of the heat-insulating cover (8), and the vertical pole passes through the through hole and protrudes out of the heat-insulating cover (8).

4. The frost-resistant soil settlement monitoring rod device according to claim 3, characterized in that: A guide tube (801) is arranged in the through hole of the heat-insulating cover (8); the inner diameter of the guide tube (801) is greater than the width of the vertical pole, and the outer diameter of the guide tube (801) is smaller than the inner diameter of the bushing.

5. The frost-resistant soil settlement monitoring rod device according to claim 1, characterized in that: A water circulation pipe (6) is laid on the ground (1) outside the liner (2), and the water circulation pipe (6) comprises a water inlet pipe and a water outlet pipe, the water inlet pipe is connected to the water inlet of the sealed cavity (201) of the liner (2), and the water outlet pipe is connected to the water outlet of the sealed cavity (201) of the liner (2), wherein the water outlet pipe surrounds the liner (2) and is laid on the ground (1) around the liner (2).

6. The frost-resistant soil settlement monitoring rod device according to claim 3, characterized in that: The lower end of the heat-insulating cover (8) is extended outward to form an outer eaves, and the heat-insulating layer (7) is laid on the outer eaves near the liner (2).

7. The frost-resistant soil settlement monitoring rod device according to claim 3, characterized in that: The thermal insulation cover (8) is a rectangular parallelepiped frame structure constructed of steel bars with a length, width and height of 35 cm and a height of 15 cm. The thermal insulation layer (7) is laid on the ground (1) outside the thermal insulation cover (8), and the thermal insulation layer (7) wraps around the outside of the rectangular parallelepiped frame structure. The perforations in the middle of the thermal insulation cover (8) penetrate the thermal insulation layer (7).

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