A device for injecting water in a fixed direction in collapsible loess

Abstract

The present invention provides a device for fixed-point directional water injection in collapsible loess, comprising an external water injection pipe and a plurality of internal water injection pipes radially rotatably sleeved in the external water injection pipe, protruding teeth are arranged between the plurality of internal water injection pipes for delayed transmission, the top of the internal water injection pipe in the top layer is connected to the water inlet pipe, the position where the internal water injection pipe in the top layer protrudes out of the external water injection pipe is fixedly connected to a rotating handle, soil moisture sensors are arranged and installed at equal distances along the thickness of the soil layer at the outer wall of the external water injection pipe, a plurality of external water injection holes are provided on the side wall of the external water injection pipe, a plurality of internal water injection holes are provided on the side wall of the internal water injection pipe, and the number of teeth of the bottom protruding teeth of the internal water injection pipe is twice that of the top protruding teeth of the next section of the internal water injection pipe. The structural design of the present invention is scientific and reasonable, can achieve the purpose of directional water injection to different soil layers, accurately inject water to different soil layers with different moisture contents, is easy to operate, has accurate control, and can be promoted for use.

Description

Technical Field

[0001] The invention relates to a geotechnical engineering soil water injection device, in particular to a device for injecting water in a fixed point in collapsible loess. Background Art

[0002] In construction projects, when encountering collapsible loess, foundation treatment is required, that is, to eliminate its collapsibility. According to the classification of buildings on collapsible loess sites (Article 3.0.1 of the "Construction Standards for Collapsible Loess Areas" GB50025-2018) and the requirements of different types of buildings, different treatment depths are adopted. However, the problem often encountered in construction is that the water content of the foundation soil is low. During foundation treatment, the soil compaction does not meet the requirements, and the collapsibility coefficient after treatment does not meet the design requirements. Article 7.5.3, paragraph 3 of the "Technical Specifications for Building Foundation Treatment" JGJ79-2012 requires: "When drilling, the foundation soil should be close to the optimal (or plastic limit) water content. When the water content of the soil is lower than 12%, the soil layer within the intended treatment range should be humidified. The water to be humidified should be evenly immersed in the soil layer within the intended treatment range through a certain number and depth of seepage holes before foundation treatment (4 to 6) days." However, there are many problems in actual construction. The water content of each layer of foundation soil is different. In actual operation, the total amount of water injection is easy to control, but the water injection location is difficult to control. Water injection often causes the water content of the soil layer with high water content to be even higher, and the soil layer with low water content may still not meet the index requirements required for construction. For this reason, it is necessary to design a device that can accurately inject water at a fixed point. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a device for injecting water at a fixed point in collapsible loess in view of the deficiencies of the above-mentioned prior art. The device is easy to operate, can accurately inject water layer by layer, has good use effect, can solve the foundation treatment problem of collapsible loess, and provide site soil conditions that meet the requirements for later construction operations. The device is highly practical and can be promoted for use.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for injecting water in a fixed point in collapsible loess, characterized in that it comprises an outer water injection pipe and a plurality of inner water injection pipes which are rotatably sleeved in the outer water injection pipe and are interconnected, wherein the plurality of inner water injection pipes are provided with protruding teeth which cooperate with each other for limiting and delaying transmission, the number of teeth of the bottom protruding teeth of the inner water injection pipe is twice the number of teeth of the top protruding teeth of the next inner water injection pipe, the inner water injection pipe on the top layer is connected to the water inlet pipe, the inner water injection pipe on the top layer extends out of the outer water injection pipe and a rotating handle is provided at the extending position, a plurality of soil moisture sensors are provided on the outer side wall of the outer water injection pipe corresponding to different soil layer depths, and the plurality of inner water injection pipes are provided with protruding teeth which cooperate with each other for limiting and delaying transmission. A plurality of inner water injection holes are provided on the side wall of the water injection pipe, and a plurality of outer water injection holes are provided on the side wall of the outer water injection pipe at heights corresponding to the inner water injection holes, the number of the outer water injection holes is equal to the total number of the inner water injection holes provided on the multiple sections of the inner water injection pipe, the angle between two adjacent inner water injection holes at the same height is equal to the angle between two adjacent outer water injection holes at the same height, the inner water injection pipe on the top layer is rotated first by rotating the rotating handle so that the inner water injection holes and the outer water injection holes are aligned and connected, thereby realizing water injection into the top soil layer, and due to the presence of the protruding teeth with delayed transmission, the second soil layer can be injected with water after the top soil layer is injected with water, and so on, thereby realizing precise water injection into different soil layers respectively.

[0005] Preferably, the multiple sections of inner water injection pipes have the same size and a length of 0.5-1 m, and soil moisture sensors are arranged and installed on the outer side wall of the outer water injection pipe every 0.5-1 m along the thickness of the soil layer.

[0006] Preferably, a sealing rubber pad is provided between the protruding teeth.

[0007] Preferably, a plurality of limiting rings are arranged on the inner side wall of the outer water injection pipe to prevent the inner water injection pipe from moving up and down along the axis of the outer water injection pipe, and the inner water injection pipe is provided with limiting grooves corresponding to the limiting rings at the positions thereof to cooperate with the limiting rings, and the limiting rings are staggered with the inner water injection holes.

[0008] Preferably, the multiple soil moisture sensors are connected to a soil moisture analyzer via data lines, and the soil moisture analyzer is used to observe the moisture content of the injected soil layer in real time, thereby controlling the external water injection holes to stop injecting water, and then injecting water into the next soil layer in turn.

[0009] Preferably, the water inlet pipe is provided with a water meter for controlling the water inlet amount, which can control the total water injection amount.

[0010] Preferably, an angle disk is provided at the top end of the side wall of the outer water injection pipe, and a pointer line is provided on the outer side wall of the inner water injection pipe located at the top end to cooperate with the angle disk to control the rotation angle. The rotation angle of the rotating handle is controlled by observing the pointer line and the angle disk to control the rotation angle of the inner water injection hole, so that the inner water injection hole and the outer water injection hole can be connected to each other, so that water flows from the inner water injection pipe and the outer water injection hole into the soil.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. The invention has a simple structure and is easy to use. It can inject water into the soil layer of the construction site layer by layer, accurately inject water according to the water demand of the soil layer, so that the soil layers with different water contents can reach the optimal water content at the same time. It has good use effect and can be promoted for use.

[0013] 2. The present invention drives the inner water injection pipe to rotate with a delayed rotation layer by layer by rotating the handle, so that the inner water injection hole and the outer water injection hole are connected, so as to realize the injection of water into the soil layer from the inner water injection pipe. Through the protrusion with half the number of teeth, when the upper protruding teeth rotate a certain angle, they will engage with the lower protruding teeth to drive the lower inner water injection pipe to rotate, thus achieving the effect of delayed rotation and realizing the layered water injection of the upper and lower inner water injection pipes.

[0014] 3. The present invention opens an inner water injection hole on the inner water injection pipe, and opens an outer water injection hole on the outer water injection pipe. The inner water injection hole can rotate relative to the outer water injection pipe. After rotating to a certain angle, the two are connected to realize water discharge, which perfectly meets the technical requirements recorded in Article 7.5.3, Paragraph 3 of the "Technical Specifications for Building Foundation Treatment" JGJ79-2012, "the water to be humidified is passed through a certain number and a certain depth of seepage holes, and evenly immersed in the soil layer within the intended treatment range", and the specifications are reasonable.

[0015] 4. The present invention installs multiple soil moisture sensors on the outer wall of the external water injection pipe at positions corresponding to different soil layers, and uses a soil moisture analyzer to monitor in real time whether the moisture content in each soil layer reaches the expected value, so as to control and stop the water injection in time, which is scientific and accurate.

[0016] The present invention is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional structural schematic diagram of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the present invention.

[0019] Figure 3 It is a schematic diagram of the connection structure of the first inner water injection pipe and the second inner water injection pipe in the present invention.

[0020] Figure 4 It is a schematic diagram of the connection structure of the second inner water injection pipe and the third inner water injection pipe in the present invention.

[0021] Figure 5 It is a schematic structural diagram of the Ⅰ-Ⅰ cross section of the present invention.

[0022] Figure 6It is a schematic diagram of the structure at the II-II section of the present invention.

[0023] Figure 7 It is a schematic diagram of the structure at the III-III cross section of the present invention.

[0024] Description of reference numerals:

[0025] 1—Water meter; 2—Water inlet pipe; 3—Rotating handle;

[0026] 4—External water injection pipe; 5—External water injection hole; 6—Soil moisture sensor;

[0027] 7—data line; 8—soil moisture analyzer; 9—first internal water injection pipe;

[0028] 10—limiting ring; 11—protruding teeth at the bottom of the first inner water injection pipe; 12—sealing rubber pad;

[0029] 13—protruding teeth at the top of the second inner water injection pipe; 14—the second inner water injection pipe; 15—protruding teeth at the bottom of the second inner water injection pipe;

[0030] 16—top of the third internal water injection pipe; 17—third internal water injection pipe; 18—internal water injection hole; protruding teeth;

[0031] 19—Water hole. DETAILED DESCRIPTION

[0032] like Figures 1 to 7As shown, the present invention comprises an outer water injection pipe 4 and three sections of inner water injection pipes rotatably sleeved in the outer water injection pipe 4 and connected through water holes 19. The outer water injection pipe 4 is inserted into a collapsible loess foundation drilled in advance, and the foundation is divided into three soil layers according to the thickness of each soil layer of 1m. The three sections of inner water injection pipes have the same length and diameter and are respectively the first inner water injection pipe 9, the second inner water injection pipe 14 and the third inner water injection pipe 17. The inner water injection pipes are provided with protruding teeth that cooperate with each other for limiting and delaying transmission. The number of teeth of the bottom protruding teeth of the inner water injection pipe is twice the number of teeth of the top protruding teeth of the next section of the inner water injection pipe. The first inner water injection pipe 9 is connected to the water inlet pipe 2, and the first inner water injection pipe 9 extends out of the outer water injection pipe 4 and a rotating handle 3 is provided at the extended position. Three soil moisture sensors 6 are provided on the outer wall of the outer water injection pipe 4 corresponding to the depths of the three soil layers, so that the three soil moisture sensors 6 are respectively located at the middle depth positions of the three soil layers. Two rows of inner water injection holes 18 are provided on the side wall of the third inner water injection pipe 17, four rows of inner water injection holes 18 are provided on the side wall of the outer water injection pipe 4, and the same number of outer water injection holes 5 as the inner water injection holes 18 are provided on the side wall of the outer water injection pipe 4 at the height corresponding to the inner water injection holes 18. The angle between two adjacent inner water injection holes 18 at the same height is equal to the angle between two adjacent outer water injection holes 5 at the same height. The angle between the two rows of inner water injection holes 18 on the first inner water injection pipe 9 is 180°, the angle between the two rows of inner water injection holes 18 on the second inner water injection pipe 14 is 45°, and the angle between the four rows of inner water injection holes 18 provided on the third inner water injection pipe 17 is 45°. By rotating the rotating handle, the inner water injection pipe of the top layer is rotated first so that the inner water injection holes and the outer water injection holes are aligned and connected, thereby realizing water injection into the top soil layer. Due to the presence of the protruding teeth with delayed transmission, the second soil layer can be injected with water after the top soil layer is injected with water. By analogy, accurate water injection into different soil layers can be realized separately.

[0033] In this embodiment, the two rows of external water injection holes 5 corresponding to the position of the first internal water injection pipe 9 can be connected to the two rows of internal water injection holes 18 and the external water injection holes 5 by rotating the first internal water injection pipe 9 by 45°, the two rows of external water injection holes 5 corresponding to the position of the second internal water injection pipe 14 can be connected to the internal water injection holes 18 here by rotating the second internal water injection pipe 14 by 90°, and the external water injection holes 5 corresponding to the position of the third internal water injection pipe 17 can be aligned and connected to the internal water injection holes 18 here by rotating the third internal water injection pipe 17 by 180°.

[0034] In this embodiment, the protruding tooth is an inclined surface with the center of the inner water injection pipe as the center and projected into a sector shape. The highest point of the inclined surface is a corner of the sector. One straight side is inclined from the highest point to the center of the circle, and the other straight side is horizontal at the height of the center of the circle. The sector-shaped arc starts from the highest point and tilts along the arc to the horizontal straight side.

[0035] Since there are 4 protruding teeth 11 at the bottom of the first inner water injection pipe (one protruding tooth is set every 90°), and there are 4 protruding teeth 13 at the top of the second inner water injection pipe (one protruding tooth is set every 90°), and the highest point height of the protruding teeth 13 at the top of the second water injection pipe is 1 / 2 of the highest point height of the protruding teeth 11 at the bottom of the first inner water injection pipe, when the first inner water injection pipe 9 is rotated 45°, the protruding teeth 11 at the bottom of the first inner water injection pipe and the protruding teeth 13 at the top of the second inner water injection pipe will engage with each other and limit the position, so that the first inner water injection pipe 9 drives the second inner water injection pipe 14 to rotate. At the same time, it can also ensure that the next time it is used, it will be rotated counterclockwise 45 degrees and will be stuck in the middle of the inclined surface of the previous protruding tooth of the second inner water injection pipe and reset.

[0036] Similarly, since there are two protruding teeth 15 at the bottom of the second inner water injection pipe and two protruding teeth 16 at the top of the third inner water injection pipe, rotating the second inner water injection pipe 14 90° will cause the protruding teeth 15 at the bottom of the second inner water injection pipe and the protruding teeth 16 at the top of the third inner water injection pipe to engage in a limited manner.

[0037] In this embodiment, the axis of the outer water injection pipe 4 and the inner water injection pipe is used as the center of the circle to divide the angle line, with 45° as an interval, and two rows of outer water injection holes 5 corresponding to the first inner water injection pipe 9 are arranged, each row has 14 holes, and the two rows of outer water injection holes 5 are respectively located at 135° and 315° positions, and the inner water injection holes 18 on the first inner water injection pipe 9 are arranged in two rows, each row has 14 holes, and are respectively located at 0° and 180° positions, then the first inner water injection pipe 9 can be rotated 45° in the clockwise direction to make the inner water injection holes 18 and the outer water injection holes 5 here connected; two rows of outer water injection holes 5 corresponding to the second inner water injection pipe 14 are arranged, each row has 14 holes, and the two rows of outer water injection holes 5 are respectively located at the corresponding 315° and 270° positions, and the inner water injection holes 18 on the second inner water injection pipe 14 are arranged. The holes 18 are arranged in two rows, with 14 holes in each row. The water injection holes 18 in the two rows are respectively located at 0° and 45°. Then, the second inner water injection pipe 14 is rotated 90° in the clockwise direction to connect the inner water injection holes 18 and the outer water injection holes 5 here; the outer water injection holes 5 corresponding to the third inner water injection pipe 17 are arranged in four rows, with 14 holes in each row. The four rows of outer water injection holes 5 are respectively located at 180°, 225°, 270° and 315°. The inner water injection holes 18 on the third inner water injection pipe 17 are arranged in four rows, with 14 holes in each row, which are respectively located at positions corresponding to 0°, 45°, 90° and 135°. Then, the third inner water injection pipe 17 is rotated 180° clockwise to connect the inner water injection holes 18 and the outer water injection holes 5 here for water injection.

[0038] In this embodiment, pipes made of flexible material are connected between the water holes 19 to ensure that the pipes do not separate and leak when rotating.

[0039] In this embodiment, a sealing rubber pad 12 is provided on the fan-shaped inclined surface of the lower layer of the mutually meshing protruding teeth. The sealing rubber pad 12 can avoid excessive wear of the protruding teeth and also play a role in preventing leakage.

[0040] In this embodiment, six limit rings 10 are arranged on the inner side wall of the outer water injection pipe to prevent the inner water injection pipe from moving up and down along the axis of the outer water injection pipe. Two limit rings 10 are arranged for each section of the inner water injection pipe. The inner water injection pipe has a limit groove at the position corresponding to the limit ring 10, which cooperates with the limit ring 10. The limit ring 10 and the inner water injection hole 18 are staggered.

[0041] In this embodiment, the three soil moisture sensors 6 are connected to the soil moisture analyzer 8 via the data line 7. The soil moisture analyzer 8 observes the moisture content of the injected soil in real time to control the external water injection hole 5 to stop injecting water and then inject water into the soil of the next soil layer in turn.

[0042] In this embodiment, a water meter 1 for controlling the water inlet amount is provided on the water inlet pipe 2, which can control the total water injection amount.

[0043] In this embodiment, an angle disk is provided at the top of the side wall of the external water injection pipe 4, and a pointer line is provided on the outer wall of the first internal water injection pipe 9 for controlling the rotation angle in cooperation with the angle disk. The rotation angle of the rotating handle is controlled by observing the pointer line and the angle disk to control the rotation angle of the internal water injection hole 18.

[0044] In this embodiment, the positions of the three inner water injection pipes corresponding to the outer water injection pipes 4 are all provided with transparent annular windows, and 360° angle scale lines are provided on the annular windows for adjusting the inner water injection hole 18 and the outer water injection hole 5 to be in the position as shown in FIG. Figure 5-7 Position shown.

[0045] The design is used for water injection operation in the collapsible loess layer 3m underground. The steps are as follows:

[0046] Step 1: Adjust the inner water injection hole 18 and the outer water injection hole 5 on the ground through the annular window and the rotating handle. Figure 5-7 Angular position shown;

[0047] Step 2: Place the device into a pre-drilled collapsible loess layer, connect an external water source through the water inlet pipe 2 to inject water into the first inner water injection pipe 9, and the water flows from the water hole 19 into the second inner water injection pipe 14 and the third inner water injection pipe 17;

[0048] Step 3, rotate the rotating handle 45° clockwise. At this time, due to the 45° virtual position between the protruding teeth 11 at the bottom of the first inner water injection pipe and the protruding teeth 13 at the top of the second inner water injection pipe, the first inner water injection pipe 9 rotates 45°, and the second inner water injection pipe 14 and the third inner water injection pipe 17 remain stationary. At the same time, the protruding teeth 11 at the bottom of the first inner water injection pipe and the protruding teeth 13 at the top of the second inner water injection pipe limit and engage, so that the inner water injection hole 18 on the first inner water injection pipe 9 is connected with the corresponding outer water injection hole 5, and water flows from the first inner water injection pipe 9 into the first soil layer, and the real-time moisture content of the first soil layer is collected by the soil moisture sensor 6 in the first soil layer, and displayed on the soil moisture analyzer 8 until the expected moisture content of the first soil layer is met;

[0049] Step 4, when the moisture content of the first soil layer reaches the requirement, rotate the rotating handle 90° clockwise again. Since the protruding teeth 11 at the bottom of the first inner water injection pipe and the protruding teeth 13 at the top of the second inner water injection pipe have been limited and engaged, the first inner water injection pipe 9 drives the second inner water injection pipe 14 to rotate 90°, and the inner water injection hole 18 on the second inner water injection pipe 14 is connected with the corresponding outer water injection hole 5 to discharge water, and water flows from the second inner water injection pipe 14 into the second soil layer. At this time, since there is a 90° virtual position between the protruding teeth 15 at the bottom of the second inner water injection pipe and the protruding teeth 16 at the top of the third inner water injection pipe, the protruding teeth 15 at the bottom of the second inner water injection pipe and the protruding teeth 16 at the top of the third inner water injection pipe are just limited and engaged until the soil moisture analyzer 8 shows that the moisture content of the second soil layer reaches the expected value;

[0050] Step 5: When the moisture content of the second soil layer reaches the expected value, rotate the rotating handle 180° clockwise to drive the third inner water injection pipe 17 to rotate so that the inner water injection hole 18 on the third inner water injection pipe 17 is connected with the corresponding outer water injection hole 5 to discharge water, until the soil moisture analyzer 8 shows that the moisture content of the third soil layer reaches the expected value;

[0051] Step 5, close the water source valve of the water inlet pipe 2, stop water injection, read the total water injection volume of this water injection, and complete the water injection of the three soil layers.

[0052] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent change made to the above embodiment according to the technical essence of the invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A device for injecting water at a fixed point in collapsible loess, characterized in that: It comprises an outer water injection pipe and three sections of inner water injection pipes which are connected to each other and are rotatably sleeved in the outer water injection pipe. The three sections of the inner water injection pipes are provided with protruding teeth which cooperate with each other for limiting and delaying transmission. The number of teeth of the bottom protruding teeth of the inner water injection pipe is twice the number of teeth of the top protruding teeth of the next section of the inner water injection pipe. The inner water injection pipe on the top layer is connected to the water inlet pipe. The inner water injection pipe on the top layer extends out of the outer water injection pipe and a rotating handle is provided at the extended position. A plurality of soil moisture sensors are provided on the outer side wall of the outer water injection pipe corresponding to different soil layer depths. A plurality of inner water injection holes are provided on the side walls of the three sections of the inner water injection pipe. A plurality of outer water injection holes are provided on the side walls of the outer water injection pipe at the heights corresponding to the inner water injection holes. The number of the outer water injection holes is equal to the total number of the inner water injection holes provided on the multiple sections of the inner water injection pipe. The angle between two adjacent inner water injection holes at the same height is equal to the angle between two adjacent outer water injection holes at the same height. The three sections of the inner water injection pipes are all the same in length and diameter and are the first inner water injection pipe, the second inner water injection pipe and the third inner water injection pipe in sequence; two rows of inner water injection holes are provided on the side walls of the first inner water injection pipe and the second inner water injection pipe, four rows of inner water injection holes are provided on the side wall of the third inner water injection pipe, and the side wall of the outer water injection pipe is provided with outer water injection holes equal in number to the inner water injection holes at the heights corresponding to the inner water injection holes, the angle between two adjacent inner water injection holes at the same height is equal to the angle between two adjacent outer water injection holes at the same height, the angle between the two rows of inner water injection holes on the first inner water injection pipe is 180°, the angle between the two rows of inner water injection holes on the second inner water injection pipe is 45°, and the angle between the four rows of inner water injection holes on the third inner water injection pipe is 45°; the angle lines are divided with the axes of the outer water injection pipe and the inner water injection pipe as the center of the circle, with an interval of 45°, corresponding to the first inner water injection pipe Two rows of external water injection holes are arranged, with 14 holes in each row, and the two rows of external water injection holes are located at 135° and 315° respectively; two rows of internal water injection holes are arranged on the first internal water injection pipe, with 14 holes in each row, and they are located at 0° and 180° respectively; two rows of external water injection holes corresponding to the second internal water injection pipe are arranged, with 14 holes in each row, and the two rows of external water injection holes are located at 315° and 270° respectively; two rows of internal water injection holes on the second internal water injection pipe are arranged, with 14 holes in each row, and the two rows of internal water injection holes are located at 0° and 45° respectively; four rows of external water injection holes corresponding to the third internal water injection pipe are arranged, with 14 holes in each row, and the four rows of external water injection holes are located at 180°, 225°, 270° and 315° respectively; four rows of internal water injection holes on the third internal water injection pipe are arranged, with 14 holes in each row, and they are located at 0°, 45°, 90° and 135° respectively.

2. The device for injecting water at a fixed point in collapsible loess according to claim 1, characterized in that: The inner side wall of the outer water injection pipe is provided with a plurality of limit rings for preventing the inner water injection pipe from moving up and down along the axis of the outer water injection pipe. The inner water injection pipe is provided with limit grooves at positions corresponding to the limit rings for engaging with the limit rings.

3. The device for injecting water at a fixed point in collapsible loess according to claim 1, characterized in that: Soil moisture sensors are installed at equal distances along the thickness of the soil layer at the outer side wall positions of the external water injection pipe corresponding to different soil layers, and the soil moisture sensors are connected to the soil moisture analyzer.

4. The device for injecting water at a fixed point in collapsible loess according to claim 1, characterized in that: The water inlet pipe is provided with a water meter for controlling the water inlet amount.

5. The device for injecting water at a fixed point in collapsible loess according to claim 1, characterized in that: An angle plate is arranged at the top end of the side wall of the outer water injection pipe, and a pointer line for cooperating with the angle plate to control the rotation angle is arranged on the outer side wall of the inner water injection pipe located at the top end.

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