Construction structure capable of solving drain board clogging

Abstract

The construction structure comprises a plurality of fine sand buffer areas arranged on a soil body in a plum blossom shape, an air filling pipe and a drainage plate are arranged in each fine sand buffer area in the vertical direction, the drainage plates are located in the center positions of the fine sand buffer areas, and the air filling pipes are symmetrically arranged on the two sides of the drainage plates; a detection device used for detecting the clogging condition of the drainage plate is further arranged in the fine sand buffer area, located between the drainage plate and the air filling pipe and arranged close to the bottom of the drainage plate. The utility model can effectively find and solve the problem of silt blockage of the drain board, simultaneously improve the drainage efficiency of the drain board in the later period and accelerate the consolidation of the soil body.

Description

Technical Field

[0001] This application relates to the technical field of soft soil foundation treatment, and particularly relates to a construction structure capable of solving the problem of drainage plate blockage. Background Art

[0002] In the current process of soft soil foundation treatment, the method of vacuum preloading combined with drainage plates is often used to drain and consolidate the soil. For example, the application number is 202211303366.7, and the name is a method for reinforcing soft soil foundation by post-grouting combined with pressurized vacuum preloading. Based on the granular material pile, it adopts the method of pre-vacuum pumping combined with alternating pressurization and later combined negative pressure grouting to increase the radial permeability coefficient of the soil. The pre-vacuum pumping makes the degree of soil consolidation increase slowly, and then the adjacent drain pipes are used for alternating pressurization and vacuum pumping to accelerate the drainage rate. It can improve the vacuum transfer efficiency in the early stage of reinforcement, and in the later stage, through grouting, effectively improve the strength of the soft soil and form a composite foundation in which the granular material pile and the surrounding soil are effectively combined.

[0003] However, during the drainage consolidation process, blockage often occurs due to the formation of a dense silt layer near the drainage plate, which affects the drainage consolidation efficiency of the drainage plate. Moreover, in the existing technology, it is impossible to effectively prevent, timely detect, and solve the problem of drainage plate blockage. Therefore, the present utility model proposes a construction structure capable of solving the problem of drainage plate blockage. Summary of the Utility Model

[0004] The embodiments of this application provide a construction structure capable of solving the problem of drainage plate blockage, which can effectively detect and solve the problem of drainage plate blockage, improve the drainage efficiency of the drainage plate in the later stage, and accelerate the soil consolidation.

[0005] In view of this, this application provides a construction structure capable of solving the problem of drainage plate blockage, including: a plurality of fine sand buffer zones arranged in a plum blossom pattern on the soil;

[0006] In each of the fine sand buffer zones, an air injection pipe and a drainage plate are arranged vertically;

[0007] The drainage plate is located at the central position of the fine sand buffer zone, and the air injection pipes are symmetrically arranged on both sides of the drainage plate;

[0008] A detection device for detecting the blockage condition of the drainage plate is further arranged in the fine sand buffer zone;

[0009] The detection device is located between the drainage plate and the air injection pipe, and is arranged near the bottom of the drainage plate.

[0010] Optionally, the soil includes a sand cushion layer and a silt layer;

[0011] The sand cushion layer is arranged above the silt layer.

[0012] Optionally, the cross-section of the air injection pipe is an arc-shaped plate structure that is narrow in the middle and wide on both sides;

[0013] A plurality of air injection holes are symmetrically formed on the left and right sides of the air injection pipe;

[0014] The aperture of each air injection hole is smaller than the sand diameter of the fine sand buffer zone.

[0015] Optionally, the number and aperture of the air injection holes gradually increase from top to bottom along the height direction of the air injection pipe.

[0016] Optionally, the upper end of the air injection pipe is connected to an external air injection system through a connector.

[0017] Optionally, the detection device is 0.3 - 0.5 m away from the bottom of the drainage board.

[0018] Optionally, the detection device includes a pressure sensor.

[0019] Optionally, the drainage board is at least 15 mm away from the outer edge of the fine sand buffer zone.

[0020] Optionally, one drainage board and two air injection pipes are arranged in each fine sand buffer zone.

[0021] Optionally, the fine sand buffer zone is cylindrical.

[0022] As can be seen from the above technical solutions, the embodiments of the present application have the following advantages: The construction structure includes a plurality of fine sand buffer zones arranged in a plum blossom pattern on the soil body. In each fine sand buffer zone, an air injection pipe and a drainage board are arranged vertically. The drainage board is located at the central position of the fine sand buffer zone, and the air injection pipes are symmetrically arranged on both sides of the drainage board. A detection device for detecting the clogging condition of the drainage board is also arranged in the fine sand buffer zone. The detection device is located between the drainage board and the air injection pipe and is arranged near the bottom of the drainage board. The existence of the fine sand buffer zone can effectively hinder the horizontal movement of small soil particles, reduce the thickness of the silt layer near the drainage board, and prevent the formation of a dense silt layer, effectively preventing or reducing the clogging of the drainage board. The detection device near the drainage board can timely judge whether the drainage board is clogged. If the drainage board is clogged, the air injection pipe can be used to move the small soil particles in the silt layer near the drainage board away from the fine sand buffer zone or both sides of the drainage board through the pressure of the gas, so as to ensure the stability of the permeability coefficient and water collection in the main water inflow direction of the drainage board, and then solve the problem of drainage board clogging. At the same time, under the action of the air pressure conveyed by the air injection pipe, the soil outside the fine sand buffer zone will produce a splitting effect, generating gas channels, forming new drainage channels in the water collection area of the drainage board, thereby improving the permeability of the soil body. This method can effectively improve the drainage efficiency of the drainage board, reduce the soil consolidation time, and improve the project quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the construction structure capable of solving the clogging of the drainage board in the embodiment of the present application;

[0024] Figure 2 is a cross-sectional view of the construction structure capable of solving the clogging of the drainage board in the embodiment of the present application;

[0025] Figure 3 is a top view of the construction structure capable of solving the clogging of the drainage board in the embodiment of the present application;

[0026] Figure 4 is a schematic diagram of the installation position of the pressure sensor in the embodiment of the present application;

[0027] Figure 5 is a schematic diagram of the positions of the drainage board and the air injection pipe in the fine sand buffer zone in the embodiment of the present application;

[0028] Figure 6 is a schematic diagram of the moving direction of the small soil particles during air injection into the air injection pipe in the embodiment of the present application;

[0029] Figure 7 is a schematic diagram of the gas channel in the embodiment of the present application;

[0030] Among them, the reference numerals are:

[0031] 1. Drainage board; 2. Air injection pipe; 3. Fine sand buffer zone; 4. Sand cushion layer; 5. Mucky soil layer; 6. Pressure sensor; 7. Gas channel. Specific embodiments

[0032] In order to enable those skilled in the art of this technology to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this application.

[0033] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] Unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0035] This application provides an embodiment of a construction structure that can solve the problem of drainage board blockage. For details, please refer to Figures 1 to 7 .

[0036] The construction structure that can solve the problem of drainage board blockage in this embodiment includes: a plurality of fine sand buffer zones 3 arranged in a plum blossom pattern on the soil body. In each fine sand buffer zone 3, an air injection pipe 2 and a drainage board 1 are arranged vertically. The drainage board 1 is located at the center of the fine sand buffer zone 3, and the air injection pipes 2 are symmetrically arranged on both sides of the drainage board 1. A detection device for detecting the blockage condition of the drainage board 1 is also arranged in the fine sand buffer zone 3. The detection device is located between the drainage board 1 and the air injection pipe 2 and is arranged close to the bottom of the drainage board 1.

[0037] It should be noted that: the existence of the fine sand buffer zone 3 can effectively hinder the horizontal movement of small soil particles, reduce the thickness of the silt layer near the drainage board 1, and avoid the formation of a dense silt layer, which can effectively prevent or reduce the blockage of the drainage board 1. The detection device near the drainage board 1 can timely judge whether the drainage board 1 is blocked. If the drainage board 1 is blocked, the air supply pipe 2 can be used to move the small soil particles in the silt layer near the drainage board 1 away from the fine sand buffer zone 3 or both sides of the drainage board 1 through the pressure of the gas, so as to ensure the stability of the permeability coefficient and water collection in the main water inflow direction of the drainage board 1, and then solve the problem of blockage of the drainage board 1. At the same time, under the action of the wind pressure conveyed by the air supply pipe 2, the soil outside the fine sand buffer zone 3 will produce a splitting effect, generating a gas channel 7, forming a new drainage channel in the water collection area of the drainage board 1, so as to improve the permeability of the soil. This method can effectively improve the drainage efficiency of the drainage board 1, and then reduce the soil consolidation time and improve the project quality.

[0038] The above is the first embodiment of a construction structure capable of solving the blockage of the drainage board provided by this application. The following is the second embodiment of a construction structure capable of solving the blockage of the drainage board provided by this application. For details, please refer to Figures 1 to 7 。

[0039] The construction structure capable of solving the blockage of the drainage board in this embodiment includes: a plurality of fine sand buffer zones 3 arranged in a plum blossom pattern on the soil body. An air supply pipe 2 and a drainage board 1 are arranged vertically in each fine sand buffer zone 3. The drainage board 1 is located at the center of the fine sand buffer zone 3, and the air supply pipes 2 are symmetrically arranged on both sides of the short side of the drainage board 1, so as to cover both sides of the drainage board 1. A detection device for detecting the blockage condition of the drainage board 1 is also arranged in the fine sand buffer zone 3. The detection device is located between the drainage board 1 and the air supply pipe 2 and is arranged near the bottom of the drainage board 1.

[0040] The soil body includes a sand cushion layer 4 and a silt layer 5, and the sand cushion layer 4 is arranged above the silt layer 5.

[0041] The cross-section of the air supply pipe 2 is an arc-shaped plate structure with a narrow middle and wide sides. A plurality of air injection holes are symmetrically arranged on the left and right sides of the air supply pipe 2, and the aperture of each air injection hole is smaller than the sand diameter of the fine sand buffer zone 3. Specifically, the air injection holes are all located in the silt layer 5 area below the sand cushion layer 4.

[0042] It should be noted that: by adopting the arc-shaped plate structure with a narrow middle and wide sides, the middle is small. First, it can save the cost of manufacturing the air supply pipe 2. Second, when the air injection system is turned on, the air pressure can quickly reach both sides and then quickly be transmitted to the soil body; the wide sides are to make the air pressure transmission area cover the entire main water inflow direction of the drainage board 1 during drainage.

[0043] The number and aperture diameter of the air injection holes gradually increase from top to bottom along the height direction of the air injection pipe 2, that is, the number and aperture diameter of the air injection holes gradually increase with the increase of the depth where they are located.

[0044] The upper end of the air injection pipe 2 is connected to the external air injection system through an adapter. When the air injection system is turned on, its air pressure can cover the main water inflow direction of the drainage board 1 through the air injection holes. Specifically, the part of the air injection pipe 2 above the sand cushion layer 4 and below the sealing film extends the pipe to the edge of the sealed site through the adapter and is connected to the external air injection system. The air injection system includes an air delivery pump and an air injection channel.

[0045] The detection device is 0.3 - 0.5 m away from the bottom of the drainage board 1. It can be understood that the blockage of the drainage board 1 generally occurs first at the bottom of the drainage board 1. The installation position can be closer to the bottom, but it cannot be directly placed at the bottom to avoid excessive energy waste caused by frequent opening of the air injection system. A certain distance from the bottom can better judge the blockage situation of the drainage board 1.

[0046] The detection device includes a pressure sensor 6, and the pressure sensor 6 is used to detect the excess pore water pressure near the drainage board 1.

[0047] The drainage board 1 is at least 15 mm away from the outer edge of the fine sand buffer zone 3, which can give full play to the role of the fine sand buffer zone 3, increase the water collection area of the drainage board 1 at the same time, and avoid excessive fine sand buffer zone 3, resulting in waste of materials.

[0048] One drainage board 1 and two air injection pipes 2 are arranged in each fine sand buffer zone 3. It can be understood that the main water inflow direction when the drainage board 1 drains water is on both sides of the drainage board 1, so it is more appropriate to arrange two air injection pipes 2, and it also saves costs.

[0049] The fine sand buffer zone 3 is cylindrical, which wraps the drainage board 1, the air injection pipe 2 and the pressure sensor 6, and the fine sand particle size is larger than the drainage aperture diameter of the drainage board 1.

[0050] During specific implementation, it includes the following steps:

[0051] Step 1. Level the site on the surface of the soft soil foundation. Fix one end of the prefabricated drain board 1 and the air injection pipe 2 in advance to the pile shoe position of the pile pipe of the vibroflot. Then drive the pile pipe to the designed depth. The drain board 1 and the air injection pipe 2 are embedded to the designed depth of the foundation along with the driving of the pile pipe. Then, use the material transportation pipe to transport fine sand into the pile pipe to form a fine sand buffer zone 3. When the fine sand is filled to 0.5 m at the bottom, install a pressure sensor 6 for detecting the excess pore water pressure near the drain board 1. After reaching the ground surface, cut off the drain board 1 and the air injection pipe 2 at 0.5 - 1 m above the ground, and then pull out the pile pipe, while avoiding pulling out the drain board 1 and the air injection pipe 2 during pipe pulling. Repeat the above steps to complete the driving of the drain board 1 within the soft soil foundation treatment range. In this embodiment, multiple drain boards 1 are arranged in a plum blossom pattern within the foundation treatment range, which is beneficial to maximizing the utilization efficiency of the drain board 1.

[0052] Step 2. Horizontally lay a sand cushion 4 on the ground surface of the foundation, and then lay the main drain pipe and the air injection channel.

[0053] Step 3. First lay geotextile on the pipeline network within the soft soil foundation treatment range. The number of layers can be determined according to the site conditions and design requirements. Then lay a sealing film on the geotextile, and dig a sealing trench around the foundation treatment range, and press the sealing film into the sealing trench with clay or silt.

[0054] Step 4. At the early stage of reinforcement, turn on all the vacuum pumps of the vacuum pumping system. When it is detected that the drain board 1 is about to be blocked or has started to be blocked, turn on the air injection system. After a period of time, turn off the air injection system.

[0055] When the vacuum consolidation efficiency is slow due to the detection of blockage by the detection device, through the combination of the vacuum pumping system and the air injection system, not only can the problem of blockage of the drain board 1 be solved, but also the radial permeability coefficient of the soil can be increased, and new drainage channels can be formed by splitting the soil, thereby improving the drainage efficiency.

[0056] This construction structure filters out larger particles in the soil through the fine sand buffer zone 3, hinders the horizontal movement of small soil particles, avoids the formation of a dense silt layer, and at the same time increases the water collection area of the drain board 1 and improves the water efficiency of the drain board 1; reduces the number of drain boards 1 used, reduces plastic pollution, and is more environmentally friendly; increases seepage and can filter fine particles in the seepage; because the particle sizes in the fine sand buffer zone 3 are similar, the void structure is stable, and the permeability changes little; the opening of the air injection system can effectively remove small soil particles near the drain board 1, clean the fine sand buffer zone 3, ensure the permeability of the fine sand buffer zone 3, and at the same time split the soil outside the fine sand buffer zone to form a gas channel 7, enhance the soil permeability, accelerate the water collection efficiency, and the air injection pipe 2 does not affect the drainage work during operation.

[0057] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A construction structure capable of solving the problem of clogging of drainage boards, characterized in that: include: Multiple fine sand buffer zones arranged in a plum blossom pattern on the soil; Each of the fine sand buffer zones is provided with an air filling pipe and a drainage board in the vertical direction; The drainage board is located at the center of the fine sand buffer zone, and the air filling pipes are symmetrically arranged on both sides of the drainage board; The fine sand buffer is also provided with a detection device for detecting the clogging of the drainage board; The detection device is located between the drain plate and the air filling pipe, and the detection device is arranged close to the bottom of the drain plate.

2. The construction structure capable of solving the problem of clogging of drainage board according to claim 1 is characterized in that: The soil body comprises a sand cushion layer and a silt soil layer; The sand cushion layer is arranged above the silt soil layer.

3. The construction structure capable of solving the problem of clogging of drainage board according to claim 1 is characterized in that: The cross section of the air filling pipe is an arc-shaped plate structure that is narrow in the middle and wide on both sides; A plurality of air injection holes are symmetrically provided on the left and right sides of the air injection pipe; The apertures of the air injection holes are all smaller than the sand diameter of the fine sand buffer zone.

4. The construction structure capable of solving the problem of clogging of drainage board according to claim 3 is characterized in that: The number and diameter of the air filling holes gradually increase from top to bottom along the height direction of the air filling pipe.

5. The construction structure capable of solving the problem of clogging of drainage board according to claim 1 is characterized in that: The upper end of the air filling pipe is connected to the external air filling system through an adapter.

6. The construction structure capable of solving the problem of clogging of drainage board according to claim 1 is characterized in that: The detection device is 0.3-0.5m away from the bottom of the drainage board.

7. The construction structure capable of solving the problem of clogging of drainage board according to claim 1 is characterized in that: The detection device includes a pressure sensor.

8. The construction structure capable of solving the problem of clogging of drainage board according to claim 1 is characterized in that: The drainage board is at least 15 mm away from the outer edge of the fine sand buffer zone.

9. The construction structure capable of solving the problem of clogging of drainage board according to claim 1, characterized in that: One drainage board and two air filling pipes are arranged in each of the fine sand buffer zones.

10. The construction structure capable of solving the problem of clogging of drainage board according to claim 1, characterized in that: The fine sand buffer zone is cylindrical.

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