Draining plate inserting plate structure for vacuum preloading of soft soil foundation

Abstract

The utility model relates to the technical field of drain boards, and discloses a drain board plug board structure for vacuum preloading of a soft soil foundation, which comprises a fixed pipe and a drain board, the lower end of the drain board is sleeved on the fixed pipe, the drain board is sleeved with a sleeve board, the lower end of the fixed pipe is fixedly connected with a conical head, the conical head is provided with a groove, and the sleeve board is sleeved on the fixed pipe. The drainage plate penetrates through the groove, and a belt returning prevention mechanism is arranged in the fixing pipe. The utility model solves the problem that the drainage plate is easy to break and cause return when the drainage plate is in direct contact with a hard soil body in the inserting and beating process.

Description

Technical Field

[0001] This utility model relates to the field of drainage board technology, specifically a drainage board insert structure for vacuum preloading of soft soil foundation. Background Technology

[0002] Plastic drainage boards are mainly used in soft soil foundation treatment projects. Typically, a strip-shaped plastic drainage board is inserted into the soft soil using a board insertion machine. The friction between the soil and the drainage board keeps it embedded. Then, preloading is applied to allow pore water in the soft soil to drain through the drainage board, shortening the consolidation time and improving the bearing capacity of the soft soil foundation. However, during construction, situations arise where the upper soil layer is hard and the lower soil layer is silty. Traditional anchoring pins are rod-shaped pile shoes, with the drainage board temporarily fixed around the pile shoe, or simply wrapped around the pile shoe and then reinserted into the sleeve. This direct contact between the drainage board and the hard soil can easily cause breakage and backlash. Construction procedures stipulate that the number of plastic drainage boards with backlash exceeding 50cm should not exceed 5% of the total number installed. Backlash not only increases the material cost of the plastic drainage boards but also affects construction progress and quality. Therefore, reducing backlash becomes a problem that construction units need to solve. Utility Model Content

[0003] To address the problems of the prior art, this utility model provides a drainage board insert structure for vacuum preloading of soft soil foundations, which solves the problem that the drainage board is prone to breakage and pullback during the insertion process due to direct contact with hard soil.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a drainage board insert structure for vacuum preloading of soft soil foundation, comprising a fixed pipe and a drainage board with its lower end sleeved on the fixed pipe, a sleeve plate being sleeved on the drainage board, a cone head being fixedly connected to the lower end of the fixed pipe, a groove being formed on the cone head, the drainage board passing through the groove, and an anti-backflow mechanism being provided inside the fixed pipe.

[0005] With the above structural design, the lower end of the drainage board is fixed to a fixed pipe with a cone head. During the process of inserting the drainage board, the cone head contacts the soil first, reducing the insertion resistance and avoiding direct collision between the drainage board and hard soil, thus preventing the drainage board from breaking.

[0006] Preferably, the anti-reverse mechanism includes a movable rod disposed within the fixed tube, an extension rod symmetrically rotatably connected to the periphery of the movable rod, an extension groove provided on the fixed tube, the position of the extension groove corresponding to the end position of the extension rod, a limit plate fixedly connected to the periphery of the movable rod, a spring sleeved on the movable rod, the spring being located between the limit plate and the inner wall of the fixed tube, and the end of the movable rod away from the spring extending into a sleeve, the sleeve being located on the inner side wall of the fixed tube.

[0007] With the above structural design, during the process of pulling the sleeve out of the soil, the outward extension rod will extend from the outward extension groove to fix the fixed pipe, which is conducive to the separation of the sleeve and the fixed pipe. The fixed pipe fixes the lower end of the drainage board, thereby preventing the drainage board from being pulled back.

[0008] Preferably, a fixing ring is symmetrically fixedly connected to the outer wall of the sleeve plate, a pin is inserted into the limiting plate, the other end of the pin passes through the fixing tube, and the fixing ring and the pin are connected by a pull rope.

[0009] With the above structural design, after the sleeve plate and fixing pipe are driven into the soil, during the process of pulling out the sleeve plate, the fixing ring drives the pull rope to pull the pin, so that the pin is pulled out from the limiting plate, causing the compressed spring to release its elastic potential energy, pushing the movable rod, and then causing the extension rod to extend out from the extension groove.

[0010] Preferably, the extended rods are arranged in an array at equal intervals along the length direction of the movable rod.

[0011] By adopting the above structural design and setting multiple sets of outriggers, the contact area with the soil is increased, which can better fix the fixing pipe in the soil and prevent backflow.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The lower end of the drainage board is fixed to a fixed pipe with a cone head. During the insertion of the drainage board, the cone head contacts the soil first to reduce the insertion resistance and avoid direct collision between the drainage board and hard soil, thus preventing the drainage board from breaking.

[0014] 2. During the process of pulling the sleeve out of the soil, the outrigger will extend from the outrigger groove to fix the fixed pipe, which is conducive to the separation of the sleeve and the fixed pipe. The lower end of the drainage board is fixed to the fixed pipe, which in turn prevents the drainage board from being pulled back. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is a schematic diagram of the internal structure of the fixed tube of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1 to 3 This utility model provides a technical solution: a drainage board insertion structure for vacuum preloading of soft soil foundation, including a fixed pipe 3 and a drainage board 2 with its lower end sleeved on the fixed pipe 3. The lower end of the drainage board 2 is bent to fix itself. A sleeve plate 1 is sleeved on the drainage board 2, and the lower end of the sleeve plate 1 is conical. A conical head 4 is fixedly connected to the lower end of the fixed pipe 3. The conical head 4 is the same length as the fixed pipe 3 and has a groove 5. The drainage board 2 passes through the groove 5. An anti-backlash mechanism 9 is provided inside the fixed pipe 3. Two sets of the anti-backlash mechanism 9 are symmetrically arranged along the middle of the fixed pipe 3. The lower end of the drainage board is fixed on the fixed pipe with the conical head. During the insertion of the drainage board 2, the conical head 4 first contacts the soil to reduce the insertion resistance and avoid direct collision between the drainage board 2 and hard soil, thus preventing the drainage board 2 from breaking.

[0020] The anti-reverse mechanism 9 includes a movable rod 901 disposed within the fixed tube 3. The length of the movable rod 901 is less than half the length of the fixed tube 3. An extension rod 902 is symmetrically rotatably connected to the periphery of the movable rod 901. An extension groove 906 is provided on the fixed tube 3, and the position of the extension groove 906 corresponds to the end position of the extension rod 902. A limiting plate 905 is fixedly connected to the periphery of the movable rod 901. A spring 904 is sleeved on the movable rod 901. The spring 904 is located between the limiting plate 905 and the inner wall of the fixed tube 3. The end of the movable rod 901 away from the spring 904 extends into a sleeve 903. The sleeve 903 is located on the inner wall of the fixed tube 3 and serves as a guide for the movable rod 901. During the process of pulling the sleeve 1 out of the soil, the outward extension rod 902 will extend from the outward extension groove 906 to fix the fixed pipe 3, which is conducive to the separation of the sleeve 1 and the fixed pipe 3. The fixed pipe 3 fixes the lower end of the drainage board 2, thereby preventing the drainage board 2 from being pulled back.

[0021] A fixing ring 6 is symmetrically fixed to the outer wall of the sleeve plate 1. A pin 7 is inserted into the limiting plate 905. The other end of the pin 7 passes through the fixing tube 3. The fixing ring 6 and the pin 7 are connected by a pull rope 8. After the sleeve plate 1 and the fixing tube 3 are driven into the soil, during the process of pulling out the sleeve plate 1, the fixing ring 6 drives the pull rope 8 to pull up the pin 7, causing the pin 7 to be pulled out from the limiting plate 905. This causes the compressed spring 904 to release its elastic potential energy, pushing the movable rod 901, and then causing the extension rod 902 to extend out from the extension groove 906.

[0022] The extended rods 902 are arranged in three sets at equal intervals along the length of the movable rod 901. The multiple sets of extended rods 902 increase the contact area with the soil, better securing the fixed pipe 3 within the soil and preventing pull-back.

[0023] Working principle: The operator first drives the device into the soil using a driving machine. During the driving of the drainage board 2, the cone head 4 contacts the soil first, reducing driving resistance and preventing the drainage board 2 from directly colliding with hard soil, thus preventing the drainage board 2 from breaking. After the sleeve plate 1 and the fixing pipe 3 are driven into the soil, during the pulling out of the sleeve plate 1, the fixing ring 6 drives the pull rope 8 to pull the pin 7, causing the pin 7 to be pulled out from the limiting plate 905. This causes the compressed spring 904 to release its elastic potential energy, pushing the movable rod 901, which in turn causes the extension rod 902 to extend from the extension groove 906, fixing the fixing pipe 3 and facilitating the separation of the sleeve plate 1 and the fixing pipe 3. The fixing pipe 3 fixes the lower end of the drainage board 2, thus preventing the drainage board 2 from being pulled back.

[0024] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drainage board insert structure for vacuum preloading of soft soil foundation, comprising a fixed pipe (3) and a drainage board (2) with its lower end sleeved on the fixed pipe (3), characterized in that: The drainage plate (2) is fitted with a sleeve plate (1), and the lower end of the fixed pipe (3) is fixedly connected with a cone head (4). The cone head (4) has a groove (5) and the drainage plate (2) passes through the groove (5). The fixed pipe (3) is equipped with an anti-backflow mechanism (9).

2. The drainage board insert structure for vacuum preloading of soft soil foundation according to claim 1, characterized in that: The anti-reverse mechanism (9) includes a movable rod (901) disposed in the fixed tube (3). An extension rod (902) is symmetrically rotatably connected to the periphery of the movable rod (901). An extension groove (906) is provided on the fixed tube (3). The position of the extension groove (906) corresponds to the end position of the extension rod (902). A limiting plate (905) is fixedly connected to the periphery of the movable rod (901). A spring (904) is sleeved on the movable rod (901). The spring (904) is located between the limiting plate (905) and the inner wall of the fixed tube (3). One end of the movable rod (901) away from the spring (904) extends into a sleeve (903). The sleeve (903) is located on the inner wall of the fixed tube (3).

3. The drainage board insert structure for vacuum preloading of soft soil foundation according to claim 2, characterized in that: A fixing ring (6) is symmetrically fixedly connected to the outer wall of the sleeve (1), and a pin (7) is inserted into the limiting plate (905). The other end of the pin (7) passes through the fixing tube (3), and the fixing ring (6) and the pin (7) are connected by a pull rope (8).

4. The drainage board insert structure for vacuum preloading of soft soil foundation according to claim 2, characterized in that: The extended rod (902) is provided with an array of equal distances along the length direction of the movable rod (901).

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