Soil infiltration line measuring device

Abstract

The utility model discloses a soil body infiltration line measuring device which comprises an embedded frame with an opening at the upper end, grid frames are fixedly arranged on the side faces and the bottom face of the embedded frame, permeable cloth is laid in the embedded frame to form a wrapping space, fine sand is laid at the bottom of the wrapping space, and an osmometer and a cable of the osmometer are further embedded in the fine sand. Coarse sand is further laid in the wrapping space above the fine sand till the upper end opening, the cable upwards penetrates through the fine sand and the coarse sand to be led out from the upper end opening, a plurality of transverse rods transversely extending outwards are further fixedly arranged at the top of the pre-embedded frame, limiting blocks are fixedly arranged at the tail ends of the transverse rods, limiting holes are formed in the limiting blocks, and a steel plate is further arranged above the pre-embedded frame. A plurality of ground nails corresponding to the limiting holes in position are arranged in the steel plate in a sliding and penetrating mode, and the ground nails penetrate through the steel plate and the limiting holes from top to bottom and are inserted into the soil body. The device can simultaneously solve the problems that the osmometer is easy to rework in burying, the burying point of the osmometer is easy to damage and the osmometer is difficult to replace and recycle.

Description

TECHNICAL FIELD

[0001] The utility model relates to infiltration line measurement technical field, concretely relates to a device for soil infiltration line measurement. BACKGROUND

[0002] In the process of civil engineering or the river bank in the wild, the infiltration line in the soil needs to be measured, through the measurement of the infiltration line, the seepage state of the soil can be known, the height and change trend of the infiltration line can reflect the intensity and distribution of the seepage, potential safety hazards can be found in time through monitoring the infiltration line, and corresponding measures are taken to deal with, so that the occurrence of safety accidents can be avoided.

[0003] The measurement of the infiltration line is generally carried out by using a seepage pressure gauge, and the seepage pressure gauge needs to be buried in a specified pit. In order to accurately measure the seepage pressure gauge, it needs to be buried according to the requirements, and the seepage pressure gauge needs to be soaked completely and then wrapped and placed at the bottom of the pit, then loose fine sand is filled, then coarse sand is filled, finally the pit hole is soaked again, and the seepage pressure gauge reading is tested, and the pit hole can be filled only after the reading is accurate. Therefore, two problems will be encountered in actual use, one is that the burying steps of the seepage pressure gauge are relatively cumbersome, the soil conditions on the spot may not meet the burying requirements of the seepage pressure gauge, the soil needs to be taken on the spot for on-site operation, and meanwhile, there may be rework due to improper operation, the efficiency needs to be improved, and the other is that the ground is easy to be damaged after the seepage pressure gauge is buried, so that the seepage pressure gauge is stolen or the measurement environment is changed, if the seepage pressure gauge is sealed with concrete, the seepage pressure gauge is difficult to recover, and the seepage pressure gauge is also difficult to take out and replace when the seepage pressure gauge fails. The above two actual situations limit the development of the infiltration line measurement work.

[0004] Therefore, a device for soil infiltration line measurement is designed, which can solve the problems of easy rework of seepage pressure gauge burying, easy damage of seepage pressure gauge burying point and difficult replacement and recovery of seepage pressure gauge. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a device for soil infiltration line measurement to solve the problems described in the background.

[0006] The technical scheme of the utility model is realized as follows:

[0007] A soil saturation line measuring device includes a pre-embedded frame with an upper opening. A grid frame is fixedly laid on the sides and bottom of the pre-embedded frame. A permeable cloth is laid inside the pre-embedded frame, enclosing the internal space except for the upper opening. An enclosing space is formed within the permeable cloth. Fine sand is laid at the bottom of the enclosing space, and a piezometer and its cable are embedded within the fine sand. Coarse sand is laid above the fine sand up to the upper opening. The cable passes through the fine and coarse sand and exits from the upper opening. Multiple horizontally extending bars are fixed to the top of the pre-embedded frame, with limiting blocks fixed at the ends of the bars. Limiting holes are formed in the limiting blocks. A steel plate is also placed above the pre-embedded frame, and multiple ground nails corresponding to the positions of the limiting holes slide through the steel plate. The ground nails pass through the steel plate and the limiting holes from top to bottom and are driven into the soil.

[0008] When using the above method, before burying the measuring device in the pit, first lay fine sand at the bottom of the enclosed space, then put in the fully soaked piezometer, cover it with fine sand, then fill it with coarse sand, and use a crossbar to set up the measuring device on a basin or bucket (hereinafter referred to as the container). Then add water to the container and check the piezometer reading. After the fine and coarse sand in the pre-buried frame are fully soaked, drain the water from the container. After the water in the pre-buried frame is filtered out through the permeable cloth, slowly add water to the container and check the piezometer reading to verify the accuracy of the piezometer test.

[0009] After the piezometer verification is complete, the pre-embedded frame is placed into the pre-dug pit, ensuring the bottom of the frame contacts the bottom of the pit, with the top opening of the frame approximately 2-4 cm above the ground level. The cable is then led out horizontally from the top opening. The excavated soil is then backfilled into the pit, burying the pre-embedded frame and cable until the backfill is 0.5-1 cm below ground level. A steel plate is then placed on top, and ground nails are driven into the soil through the limiting holes. The cable is led out upwards from the edge of the steel plate. At this point, the entire immersion line measuring device is installed. The pre-embedded frame and piezometer are protected by the steel plate, making them difficult to dig or damage. Without special tools, it is also difficult for someone to remove the pre-embedded frame and piezometer. When replacement or recycling is needed later, special tools can be used to quickly remove the ground nails, remove the steel plate, and retrieve the piezometer and pre-embedded frame, avoiding the problems of traditional methods that use concrete sealing, which make replacement and recycling difficult.

[0010] When using this device, the adjustment and testing of the piezometer are completed before it is lowered into the pit. The pre-embedded frame's grid structure can effectively support the permeable cloth, while the permeable cloth can effectively wrap the fine and coarse sand and adjust the moisture content of the fine and coarse sand. This makes it easy to adjust and test the piezometer externally in advance, avoiding the problem of rework in burying the piezometer.

[0011] A further technical solution is that the embedded frame includes a bottom frame, a top frame, and at least three diagonal braces. The top frame is located above the bottom frame, and the interior of the top frame forms the upper opening of the embedded frame. The interior of the bottom frame forms the bottom surface of the embedded frame. The area of ​​the top frame is smaller than that of the bottom frame and is located within the vertical projection range of the bottom frame. The top frame and the bottom frame are fixedly connected by diagonal braces. The diagonal braces, together with the top frame and the bottom frame, form at least three sides of the embedded frame. The horizontal brace is fixedly connected to the top frame.

[0012] When using the above scheme, by setting the area of ​​the top frame to be smaller than that of the bottom frame and within the vertical projection range of the bottom frame, the pre-embedded frame is larger at the bottom and smaller at the top, which makes it easier for the backfill soil to quickly and completely bury the entire pre-embedded frame without leaving gaps when backfilling the pit, thus ensuring the accuracy of subsequent test results.

[0013] A further technical solution is that both the bottom frame and the top frame are rectangular frames, and there are four diagonal braces. The two ends of the diagonal braces are connected to the corners of the bottom frame and the corners of the top frame, respectively, to form four trapezoidal embedded frame sides.

[0014] A further technical solution is that the bottom frame, top frame, and diagonal brace are all made of stainless steel, and the grid frame is made of stainless steel. There are five grid frames in total, and the grid frames are respectively fixedly laid in the internal space of the bottom frame and on the sides of the four trapezoidal pre-embedded frames.

[0015] A further technical solution is that there are four crossbars, one end of which is fixed to the corner of the top frame, and the other end of which extends outward along the diagonal of the top frame.

[0016] A further technical solution is to make the crossbar out of stainless steel.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. Convenience of pre-testing and adjustment: The adjustment and testing of the piezometer are completed before it is installed in the pit, avoiding rework after installation and improving work efficiency and test accuracy.

[0019] 2. Comprehensive protection mechanism: The pre-embedded frame and piezometer are protected by the steel plate above, making them difficult to dig out and damage, thus enhancing the safety and stability of the equipment.

[0020] 3. Easy to replace and recycle: Special tools can be used to quickly remove the ground nails, steel plates, piezometers and embedded frames, solving the problem of difficulty in replacement and recycling caused by the traditional method of sealing with concrete.

[0021] 4. Reasonable design of the pre-embedded frame: The grid frame of the pre-embedded frame effectively supports the permeable cloth, while the permeable cloth plays the role of wrapping and regulating the moisture of the sand. At the same time, the design of the pre-embedded frame, which is larger at the bottom and smaller at the top, makes it easy to quickly and completely cover the pit during backfilling without leaving gaps, thus ensuring the accuracy of the test results. Attached Figure Description

[0022] Fig. 1 This is a schematic diagram of the overall installation of this utility model;

[0023] Fig. 2 A three-dimensional schematic diagram of the pre-embedded frame (permeable fabric is hidden);

[0024] Fig. 3 A three-dimensional schematic diagram of the pre-embedded frame (the grid frame is hidden);

[0025] Fig. 4 This is a top view of the pre-embedded frame.

[0026] In the diagram, 1. Soil, 2. Ground nail, 3. Steel plate, 4. Crossbar, 5. Embedded frame, 6. Coarse sand, 7. Fine sand, 8. Piezometer, 9. Cable, 10. Grid frame, 11. Permeable cloth, 12. Bottom frame, 13. Diagonal bar, 14. Top frame, 15. Limiting block, 16. Limiting hole. Detailed Implementation

[0027] To better understand the technical content of this utility model, specific embodiments are provided below, and the utility model will be further described in conjunction with the accompanying drawings.

[0028] See Figs. 1 to 4 A device for measuring the phreatic line of soil 1, comprising a pre-embedded frame 5 with an opening at the top.

[0029] Specifically, the embedded frame 5 includes a bottom frame 12, a top frame 14, and four diagonal braces 13. The bottom frame 12 is a rectangular frame welded from stainless steel pipes, and the top frame 14 is a rectangular frame welded from stainless steel pipes. The top frame 14 is located above the bottom frame 12, and its interior forms the upper opening of the embedded frame 5. The interior of the bottom frame 12 forms the bottom surface of the embedded frame 5. The area of ​​the top frame 14 is smaller than that of the bottom frame 12 and it is located within the vertical projection range of the bottom frame 12. The diagonal braces 13 are stainless steel pipes, and their two ends are welded to the corners of the bottom frame 12 and the top frame 14, respectively. The diagonal braces 13, the top frame 14, and the bottom frame 12 together form four trapezoidal sides of the embedded frame 5.

[0030] The sides and bottom of the pre-embedded frame 5 are fixedly covered with grid frames 10. The grid frames 10 are stainless steel grid frames, and there are five grid frames 10 in total. The bottom grid frames 10 are laid in the internal space of the bottom frame 12, and the edges of the grid frames 10 are welded to the bottom frame 12. The four side grid frames 10 are laid in the four trapezoidal sides of the pre-embedded frame 5, and the edges of the four side grid frames 10 are welded to the bottom frame 12, the diagonal bar 13 and the top frame 14 respectively.

[0031] The interior of the pre-embedded frame 5 is covered with a permeable cloth 11, so that the permeable cloth 11 surrounds and wraps the interior space of the pre-embedded frame 5 with only the upper opening exposed, forming a wrapping space inside the permeable cloth 11.

[0032] The bottom of the enclosed space is covered with fine sand 7, and a piezometer 8 and its cable 9 are buried in the fine sand 7. The enclosed space above the fine sand 7 is covered with coarse sand 6 up to the upper opening. The cable 9 passes through the fine sand 7 and coarse sand 6 and is led out from the upper opening.

[0033] The top of the pre-embedded frame 5 is also fixed with four horizontal bars 4 extending outward. The horizontal bars 4 are long strips of stainless steel. One end of the horizontal bar 4 is welded to the corner of the top frame 14, and the other end of the horizontal bar 4 extends outward along the diagonal of the top frame 14.

[0034] A stainless steel limiting block 15 is welded to the end of the crossbar 4. A limiting hole 16 is opened in the limiting block 15. A steel plate 3 is also provided above the pre-embedded frame 5. Multiple ground nails 2 corresponding to the positions of the limiting holes 16 are slidably inserted in the steel plate 3. The ground nails 2 pass through the steel plate 3 and the limiting holes 16 from top to bottom and are driven into the soil 1.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for measuring the soil phreatic line, characterized in that: The system includes an embedded frame with an opening at the top. A grid frame is fixedly laid on the sides and bottom of the embedded frame. A permeable cloth is laid inside the embedded frame, enveloping the internal space with only the top opening exposed. An enclosing space is formed within the permeable cloth. Fine sand is laid at the bottom of this enclosing space, and a piezometer and its cable are embedded within the fine sand. Coarse sand is laid above the fine sand, extending to the top opening. The cable passes through the fine and coarse sand and exits from the top opening. Multiple horizontally extending bars are fixed to the top of the embedded frame, with limiting blocks at the ends of the bars and limiting holes in the blocks. A steel plate is also installed above the embedded frame, with multiple ground nails slidingly inserted through it, each corresponding to one of the limiting holes. The ground nails pass through the steel plate and limiting holes from top to bottom and are driven into the soil.

2. The soil saturation line measuring device according to claim 1, characterized in that: The embedded frame includes a bottom frame, a top frame, and at least three diagonal braces. The top frame is located above the bottom frame, and the interior of the top frame forms the upper opening of the embedded frame. The interior of the bottom frame forms the bottom surface of the embedded frame. The area of ​​the top frame is smaller than that of the bottom frame and is located within the vertical projection range of the bottom frame. The top frame and the bottom frame are fixedly connected by diagonal braces. The diagonal braces, together with the top frame and the bottom frame, form at least three sides of the embedded frame. The horizontal brace is fixedly connected to the top frame.

3. The device for measuring soil saturation lines according to claim 2, characterized in that: The bottom frame and top frame are both rectangular frames, and there are four diagonal braces. The two ends of the diagonal braces are connected to the corners of the bottom frame and the corners of the top frame, respectively, to form four trapezoidal embedded frame sides.

4. The soil saturation line measuring device according to claim 3, characterized in that: The bottom frame, top frame, and diagonal braces are all made of stainless steel. The grid frame is also made of stainless steel. There are five grid frames in total, which are fixedly laid inside the bottom frame and on the sides of the four trapezoidal embedded frames.

5. A soil saturation line measuring device according to claim 2, characterized in that: There are four crossbars, one end of which is fixed to the corner of the top frame, and the other end of which extends outward along the diagonal of the top frame.

6. The device for measuring soil saturation lines according to claim 1, characterized in that: The crossbar is made of stainless steel.

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