Intelligent control stability augmentation flow guide soil retaining system capable of rapidly solidifying and widening dike and construction method of intelligent control stability augmentation flow guide soil retaining system

Abstract

The invention relates to an intelligent control stability augmentation flow guide soil retaining system capable of rapidly solidifying and widening a dike and a construction method, the dike comprises a dike main body, a riverbed, dike side river water, structure side river water and a flow guide soil retaining structure, the flow guide soil retaining structure comprises a retaining soil, a widening dike, a drainage device and a grouting pipe, and the retaining soil is provided with a flow guide cavity penetrating through the outside; the widened dike is arranged between the retaining soil and the dike main body; the drainage device comprises a drainage pipe and a pump connected with the drainage pipe, one end of the drainage pipe is arranged in the widened dike, and the other end of the drainage pipe extends into the flow guide cavity; one end of the grouting pipe penetrates through the retaining soil and extends to the external space. Through mutual cooperation of the soil retaining device, the dike widening device and the drainage device, high-water-content filling soil can be properly treated, rapid drainage is achieved, and therefore the stability of the dike is powerfully improved, and the situation of piping and scattered leaching of the dike is prevented. The device has the advantages of being simple in structure, convenient to operate, easy to popularize and the like, and has great significance in promoting the dike to achieve efficient and safe widening construction.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy engineering, and in particular to an intelligent control stabilization diversion and retaining system and a construction method for rapidly consolidating and widening embankments. Background Art

[0002] With higher requirements for flood control safety in river basins and regions, it is necessary to accelerate the construction of embankments in important river sections of major rivers. In addition to strengthening the existing embankments, the upgrading of embankment projects often requires measures to increase height and thickness. For levee projects, heightening and thickening can be achieved by filling and compacting or building retaining walls, but it faces the following difficulties: ① When filling, a large amount of soil that meets the filling requirements is required, such as the moisture content of the fill is close to the optimal moisture content; when the widening boundary line is limited, it will lead to problems such as a large widening side slope ratio, a steep slope, and unstable soil slopes; ② When building retaining walls, it will block the drainage of levee seepage water. When its drainage holes are blocked and the drainage is not smooth or cannot be drained quickly, it will cause the infiltration line in the levee to rise, the soil to soften, and then affect the stability of the levee; ③ The soil moisture content near rivers, lakes and reservoirs is usually high. If it can be used as a resource in levee widening projects, it will save a lot of construction costs. However, it faces the problem of high soil moisture content.

[0003] Therefore, for the upgrading of embankment construction, there is an urgent need for a retaining structure and construction method that can handle high moisture content, quickly drain water, and increase embankment stability. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to overcome the technical defects existing in the prior art, and to propose an intelligent control stabilization and diversion retaining system and construction method for rapid consolidation and widening of the embankment. Through the mutual cooperation of the retaining device, the widening embankment and the drainage device, it can properly handle the high-water content fill and achieve rapid drainage, thereby effectively improving the stability of the embankment and preventing dangerous situations such as pipe bursts and seepage from the embankment.

[0005] In order to solve the above technical problems, the present invention provides an intelligent control stabilization diversion and retaining system for rapid consolidation and widening of embankments. The embankment includes an embankment body and a riverbed, including:

[0006] A soil retaining device having a diversion cavity penetrating the outside, wherein the soil retaining device is arranged on the riverbed;

[0007] A widening embankment is arranged between the retaining device and the embankment body;

[0008] A drainage device, comprising a drainage pipe and a pump connected to the drainage pipe, wherein one end of the drainage pipe is arranged in the widened embankment, and the other end of the drainage pipe extends into the diversion cavity, and when pore water exists in the widened embankment, the widened embankment is drained through the drainage pipe;

[0009] The grouting pipe, one end of which penetrates through the retaining device and extends to the external space, and when the widened dike is reinforced, the other end of the grouting pipe is connected to the pump.

[0010] In one embodiment of the present invention, the widened dike includes a coarse sand layer and a filling soil layer, and along the height direction of the retaining device, the coarse sand layer and the filling soil layer are arranged in a stacked manner from bottom to top.

[0011] In one embodiment of the present invention, the drain pipe includes a first main drain pipe and at least one second main drain pipe. One end of the first main drain pipe is arranged in the coarse sand layer, and the other end of the first main drain pipe extends into the diversion cavity. One end of at least one second main drain pipe is distributed in the filling soil layer, and the other end of the second main drain pipe extends into the diversion cavity. In the diversion cavity, the first main drain pipe and the second main drain pipe are connected to the corresponding pumps.

[0012] In one embodiment of the present invention, the drain pipe further includes a first drain branch pipe and a second drain branch pipe, the first drain branch pipe intersects with the first main drain pipe, and the second drain branch pipe intersects with the second main drain pipe.

[0013] In one embodiment of the present invention, the drainage device further includes an intelligent control platform and a pore water pressure gauge. Pore water pressure gauges are arranged on both the first main drain pipe and the second main drain pipe. The pore water pressure gauge is used to measure the pore water pressure in the soil, and the intelligent control platform is used to collect the readings of the pore water pressure gauge and start and stop the pump according to the readings of the pore water pressure gauge.

[0014] In one embodiment of the present invention, the pump has a forward operation mode and a reverse operation mode. When there is pore water in the widened dike, the forward operation mode of the pump is turned on to drain the widened dike, and when the widened dike is reinforced, the reverse operation mode of the pump is turned on to convey the reinforcement liquid to the widened dike.

[0015] In one embodiment of the present invention, a open channel is arranged on the side of the retaining device facing away from the riverbed.

[0016] In one embodiment of the present invention, a vacuum membrane is further included. The vacuum membrane is built in at one end of the filling soil layer facing away from the coarse sand layer, and both ends of the vacuum membrane are respectively connected to the dike main body and the retaining device.

[0017] In addition, the present invention also provides a construction method of an intelligent control and stability-increasing diversion and retaining system for quickly consolidating a widened dike as described above. The method includes:

[0018] Step S11: Install a retaining device on the riverbed, place the first drainage branch pipe on the riverbed between the retaining device and the main body of the dike, and install the first drainage main pipe and the pore water pressure gauge. The buried elevation of the pore water pressure gauge is the same as that of the first drainage branch pipe, and the pore water pressure gauge is closely attached to the first drainage branch pipe;

[0019] Step S12: Backfill coarse sand from bottom to top on the riverbed between the retaining device and the main body of the dike and compact it to form a coarse sand layer, where the top height of the coarse sand layer exceeds the elevation of the first drainage branch pipe;

[0020] Step S13: Backfill a set thickness of fill soil on the coarse sand layer to form a fill soil layer, and lay at least one second drainage main pipe, second drainage branch pipe and pore water pressure gauge. After backfilling a set thickness of fill soil, arrange the vacuum membrane, and cover a set thickness of fill soil on the vacuum membrane. The two ends of the vacuum membrane are respectively connected to the main body of the dike and the retaining device;

[0021] Step S14: Turn on the forward operation mode of all pumps to drain the widened dike, so that the vacuum membrane tightens and squeezes the widened dike for drainage. During the drainage of the widened dike, continuously collect the readings of the pore water pressure gauges on the second drainage main pipe. When the pore water pressure gauge detects pore water in the fill soil layer, turn on the forward operation mode of the pump connected to the second drainage main pipe to drain the widened dike until the pore water pressure gauge detects no pore water and the surface settlement of the widened dike is less than the set threshold value, then stop drainage;

[0022] Step S15: Connect the grouting pipe to the corresponding pump, and turn on the reverse operation mode of the pump. Through the corresponding second drainage main pipe and second drainage branch pipe, deliver the reinforcement liquid to the corresponding position of the fill soil layer. During the drainage and consolidation of the fill soil layer, continuously collect the readings of the pore water pressure gauges on the first drainage main pipe. When the pore water pressure gauge detects pore water in the coarse sand layer, turn on the forward operation mode of the pump connected to the first drainage main pipe to drain the widened dike until the pore water pressure gauge detects no pore water.

[0023] In an embodiment of the present invention, in steps S14 and S15, when the pore water pressure gauge detects pore water in the widened dike and the pump cannot pump out water due to blockage, turn off the forward operation mode of the pump, and start the reverse operation mode of the pump to pump air into the corresponding drainage pipe to flush out the blockage.

[0024] The above technical solution of the present invention has the following advantages compared with the prior art:

[0025] Through the mutual cooperation of the retaining device, the widened dike, and the drainage device, the present invention can properly handle the high-moisture-content fill soil, achieve rapid drainage, thereby effectively enhancing the stability of the dike and preventing dangerous situations such as piping and seepage of the dike. The invention has the advantages of simple structure, easy operation, and easy promotion, and is of great significance for promoting the efficient and safe widening construction of the dike. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the content of the present invention easier to be clearly understood, the following further details the present invention according to the specific embodiments of the present invention in combination with the drawings.

[0027] Figure 1 It is a schematic diagram of the usage scenario of the present invention.

[0028] Figure 2 It is a schematic diagram of the diversion and retaining soil system of the present invention.

[0029] Figure 3 It is a schematic sectional view of the structure of the present invention.

[0030] Figure 4 It is a schematic diagram of the drainage device of the present invention.

[0031] Figure 5 It is a schematic diagram of the structure of the upper drainage branch pipe of the present invention.

[0032] Figure 6 It is a flowchart of the method of the present invention.

[0033] Figure 7 It is a schematic diagram of an application case of the present invention.

[0034] Figure 8 It is a specification dimension diagram of the diversion and retaining soil structure of an application case of the present invention.

[0035] Among them, the description of the reference numerals is as follows: 1. Dike main body; 2. Riverbed; 3. River water on the dike side; 4. Flow - guiding retaining structure; 5. River water on the structure side; 6. Widened dike; 41. Retaining device; 42. Erosion - prevention structure; 43. Vacuum membrane; 61. Coarse sand layer; 62. Filling soil layer; 75. Slurry mixing barrel; 76. Grouting pipe; 77. Intelligent control platform; 78. Signal cable of pore water pressure gauge; 79. Signal cable of pump; 411. Flow - guiding cavity; 412. Open channel; 413. Thread - passing hole; 414. Drain pipe hole; 415. Grouting pipe hole; 711. Upper - layer drainage branch pipe; 712. Middle - layer drainage branch pipe; 713. Lower - layer drainage branch pipe; 721. Upper - layer drainage main pipe; 722. Middle - layer drainage main pipe; 723. Lower - layer drainage main pipe; 731. Upper - layer pump; 732. Middle - layer pump; 733. Lower - layer pump; 741. Upper - layer pore water pressure gauge; 742. Middle - layer pore water pressure gauge; 743. Lower - layer pore water pressure gauge; 7111. Plastic drainage filter pipe; 7112. Small holes; 7113. Geotextile. Detailed implementation manners

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the specific embodiments cited are not intended to limit the present invention.

[0037] Please refer to Figure 1 and Figure 2 As shown, this embodiment provides an intelligent control and stability - enhancing flow - guiding retaining system for quickly consolidating and widening a dike. The dike includes a dike main body 1, a riverbed 2, river water on the dike side 3, river water on the structure side 5, and a flow - guiding retaining structure 4. Among them, the flow - guiding retaining structure 4 includes a retaining device 41, a widened dike 6, a drainage device, and a grouting pipe 76. The retaining device 41 has a flow - guiding cavity 411 that penetrates to the outside, and the retaining device 41 is arranged on the riverbed 2; the widened dike 6 is arranged between the retaining device 41 and the dike main body 1; the drainage device includes a drain pipe and a pump connected to the drain pipe. One end of the drain pipe is arranged in the widened dike 6, and the other end of the drain pipe extends into the flow - guiding cavity 411. When there is pore water in the widened dike 6, the widened dike 6 is drained through the drain pipe; one end of the grouting pipe 76 penetrates through the retaining device 41 and extends to the external space. When the widened dike 6 is reinforced, the other end of the grouting pipe 76 is connected to the pump.

[0038] Through the mutual cooperation of the retaining device 41, the widened dike 6, and the drainage device, the present invention can properly handle high - moisture - content fill soil, achieve rapid drainage, thereby effectively enhancing the stability of the dike and preventing dangerous situations such as piping and seepage of the dike. The invention has the advantages of simple structure, easy operation, and easy popularization, and is of great significance for promoting the efficient and safe widening construction of the dike.

[0039] As Figure 2As shown in the figure, the diversion and retaining structure further includes an erosion prevention structure 42 and a vacuum membrane 43. The retaining device 41 is located on the riverbed 2 to prevent the river water 5 on the structure side from eroding and widening the levee 6; the erosion prevention structure 42 is located on the riverbed 2 to prevent the river water 5 on the structure side from eroding the riverbed 2 at the bottom of the retaining structure 41; the vacuum membrane 43 is placed at the top of the widened levee 6, and both ends of the vacuum membrane 43 are respectively connected to the main body of the levee 1 and the retaining device 41. The vacuum membrane 43 is a flexible sealing film that is impermeable to water and air.

[0040] Among them, the retaining device 41 has a diversion cavity 411, a open channel 412, a wire passing hole 413, a drain pipe hole 414 and a grouting pipe hole 415. The diversion cavity 411 is a hollow structure, which can not only provide a drainage channel for the water discharged from the widened levee 6, but also reduce the weight of the retaining device 41 and reduce the project construction cost; the open channel 412 is arranged on the side of the retaining structure 411 facing away from the riverbed 2, and is used to collect and drain the water on the surfaces of the main body of the levee 1 and the widened levee 6; both the drain pipe hole 414 and the grouting pipe hole 415 are through holes connecting the outside and the diversion cavity 411. Among them, the drain pipe hole 414 is used to install a drain pipe, and the grouting pipe hole 415 is used to install a grouting pipe 76.

[0041] As Figure 3 and Figure 4 shown in the figure, the widened levee 6 includes a coarse sand layer 61 and a filling layer 62. Along the height direction of the retaining device 41, the coarse sand layer 61 and the filling layer 62 are arranged in layers from bottom to top. Among them, the coarse sand layer 61 has a large permeability coefficient, which is convenient for the collection and discharge of water in the main body of the levee 1 and the widened levee 6; the filling layer 62 is the backfill soil to be consolidated, and is backfilled in layers during construction.

[0042] Subsequently, the above-mentioned drain pipe includes a first main drain pipe and at least one second main drain pipe. One end of the first main drain pipe is arranged in the coarse sand layer 61, and the other end of the first main drain pipe extends into the diversion cavity 411. One end of at least one second main drain pipe is distributed in the filling layer 62, and the other end of the second main drain pipe extends into the diversion cavity 411. In the diversion cavity 411, both the first main drain pipe and the second main drain pipe pass through the drain pipe hole 414 and are connected to the corresponding pump. Preferably, the number of the second main drain pipes can be two. The two second main drain pipes are arranged at intervals in the filling layer 62. In combination with the first main drain pipe, the first main drain pipe (hereinafter referred to as the bottom drain pipe 723), one of the second main drain pipes (hereinafter referred to as the middle drain pipe 722) and the other second main drain pipe (hereinafter referred to as the upper drain pipe 721) are respectively located at the bottom, middle and upper layers of the widened levee 6, so as to be able to drain the corresponding layer of the widened levee 6 according to the actual situation.

[0043] In this embodiment, the above-mentioned drain pipe further includes a first drain branch pipe, a second drain branch pipe, an intelligent control platform 77, and a pore water pressure gauge. The first drain branch pipe intersects with the first main drain pipe, and the second drain branch pipe intersects with the second main drain pipe. Pore water pressure gauges are arranged on both the first main drain pipe and the second main drain pipe. The pore water pressure gauge is used to measure the pore water pressure in the soil body, and the intelligent control platform 77 is used to collect the readings of the pore water pressure gauge and start and stop the pump according to the readings of the pore water pressure gauge. Preferably, the number of the first drain branch pipes is at least two, and the two first drain branch pipes are distributed on both sides of the first main drain pipe, so as to significantly increase the distribution area of the first drain branch pipe in the coarse sand layer and improve the drainage effect. Similarly, the number of the second drain branch pipes is at least two, and the two second drain branch pipes are distributed on both sides of the second main drain pipe. Corresponding to the above-mentioned bottom main drain pipe 723, middle main drain pipe 722, and upper main drain pipe 721, the first drain branch pipe installed on the bottom main drain pipe 723 in this embodiment is called the bottom drain branch pipe 713, the second drain branch pipe installed on the middle main drain pipe 722 is called the middle drain branch pipe 712, and the second drain branch pipe installed on the upper main drain pipe 721 is called the upper drain branch pipe 711. Similarly, the pore water pressure gauge installed on the bottom main drain pipe 723 is called the bottom pore water pressure gauge 743, the pore water pressure gauge installed on the middle main drain pipe 722 is called the middle pore water pressure gauge 742, and the pore water pressure gauge installed on the upper main drain pipe 721 is called the upper pore water pressure gauge 741; the pump connected to the bottom main drain pipe 723 is called the bottom pump 733, the pump connected to the middle main drain pipe 722 is called the middle pump 732, and the pump connected to the upper main drain pipe 721 is called the upper pump 731. The above-mentioned pump has a forward operation mode and a reverse operation mode. When there is pore water in the widened levee 6, the forward operation mode of the pump is turned on to drain the widened levee 6. When the widened levee 6 is reinforced, the reverse operation mode of the pump is turned on to convey the reinforcement liquid to the widened levee 6.

[0044] The intelligent control and stability - increasing diversion and soil - retaining system for rapid consolidation and widening of dikes provided in this embodiment further includes a slurry mixing barrel 75, a pore water pressure gauge signal cable 78, and a pump signal cable 79. One end of the grouting pipe 76 passes through the grouting pipe hole 415 and is connected to the slurry mixing barrel 75, and the other end is connected to the upper - layer pump 731 or the middle - layer pump 732 when needed, for transporting the reinforcement liquid into the corresponding drainage branch pipes and main drainage pipes. Both the pore water pressure gauge signal cable 78 and the pump signal cable 79 pass through the wire - passing hole 413 and are connected to the intelligent control platform 77. The intelligent control platform 77 is used to collect the readings of the pore water pressure gauge and start and stop the pump according to the readings of the pore water pressure gauge. That is, when the pore water pressure gauge monitors water pressure, start the forward operation mode (positive - circulation function) of the pump to pump water. When the pore water pressure gauge does not monitor water pressure, turn off the forward operation mode of the pump. When the pore water pressure gauge monitors water pressure, but the pump cannot pump water because the geotextile 7113 is blocked by fine particles, start the reverse operation mode (reverse - circulation function) of the pump, pump air into the blocked main drainage pipe, wash away the fine particles on the geotextile 7113, and then start the forward operation mode of the pump to pump water. When it is necessary to pump the reinforcement liquid by the pump, start the stirring function of the slurry mixing barrel 75, and at the same time start the reverse operation mode of the pump, so that the reinforcement liquid is pumped into the filling layer 62 in sequence through the grouting pipe 76, the second main drainage pipes (referring to the upper - layer main drainage pipe 721 and the middle - layer main drainage pipe 722) and the second drainage branch pipes (referring to the upper - layer drainage branch pipe 711 and the middle - layer drainage branch pipe 712) for consolidation. After reaching the reinforcement pressure, turn off the stirring function of the slurry mixing barrel 75 and at the same time turn off the reverse operation mode of the pump.

[0045] As Figure 5 shown, taking the upper - layer drainage branch pipe 711 as an example to illustrate the composition of the drainage branch pipe, it is made of a plastic drainage perforated pipe 7111 with small holes 7112 wrapped with a geotextile 7113.

[0046] Through the cooperation of the diversion and soil - retaining structure, the widened dike 6, and the intelligent control platform 77, the present invention can handle high - moisture - content fill soil, quickly drain the water in the dike, thereby increasing the stability of the dike.

[0047] Corresponding to the above - mentioned intelligent control and stability - increasing diversion and soil - retaining system for rapid consolidation and widening of dikes, the embodiment of the present invention also provides a construction method for the intelligent control and stability - increasing diversion and soil - retaining system for rapid consolidation and widening of dikes. As Figure 6 shown, the method includes the following steps:

[0048] Step S11: Install the soil - retaining device on the riverbed, place the first drainage branch pipe on the riverbed between the soil - retaining device and the main body of the dike, and install the first main drainage pipe and the pore water pressure gauge. The buried elevation of the pore water pressure gauge is the same as that of the first drainage branch pipe, and the pore water pressure gauge is closely attached to the first drainage branch pipe;

[0049] Step S12: Backfill coarse sand from bottom to top on the riverbed between the retaining device and the main body of the dike and compact it to form a coarse sand layer, where the top elevation of the coarse sand layer exceeds the elevation of the first drainage branch pipe.

[0050] Step S13: Backfill a soil layer with a set thickness on the coarse sand layer to form a soil filling layer, and arrange at least one second drainage main pipe, second drainage branch pipe, and pore water pressure gauge. After backfilling the soil layer with a set thickness, lay a vacuum membrane and cover the vacuum membrane with a set thickness of soil. The two ends of the vacuum membrane are respectively connected to the main body of the dike and the retaining device.

[0051] Step S14: Turn on the forward operation mode of all pumps to drain the widened dike, so that the vacuum membrane tightens and squeezes the widened dike for drainage. During the drainage of the widened dike, continuously collect the readings of the pore water pressure gauges on the second drainage main pipe. When the pore water pressure gauge detects pore water in the soil filling layer, turn on the forward operation mode of the pump connected to the second drainage main pipe to drain the widened dike until the pore water pressure gauge detects no pore water and the surface settlement of the widened dike is less than the set threshold, then stop drainage.

[0052] Step S15: Connect the grouting pipe to the corresponding pump, and turn on the reverse operation mode of the pump. Through the corresponding second drainage main pipe and second drainage branch pipe, convey the reinforcement liquid to the corresponding positions of the soil filling layer. During the drainage and consolidation of the soil filling layer, continuously collect the readings of the pore water pressure gauges on the first drainage main pipe. When the pore water pressure gauge detects pore water in the coarse sand layer, turn on the forward operation mode of the pump connected to the first drainage main pipe to drain the widened dike until the pore water pressure gauge detects no pore water.

[0053] Through the mutual cooperation of the retaining device 41, the widened dike 6, and the drainage device, the present invention can properly handle the high moisture content soil, achieve rapid drainage, thereby effectively improving the stability of the dike and preventing dangerous situations such as piping and seepage of the dike. The invention has the advantages of simple structure, easy operation, and easy promotion, and is of great significance for promoting the efficient and safe widening construction of the dike.

[0054] The following elaborates in detail the construction method of an intelligent control and stability - increasing diversion and retaining system for rapid consolidation and widening of a dike proposed by the present invention through specific implementation operations.

[0055] 1. Adopt engineering measures such as cofferdams to block the river water 5 on the side of the structure, create a relatively dry construction condition for the construction of the diversion and retaining structure 4, and level the riverbed 2 site at the bottom of the diversion and retaining structure 4.

[0056] 2. Prefabricate the diversion and retaining structure 4 according to the design scheme and install it or cast the diversion and retaining structure 4 on - site, and install the intelligent control platform 77 on the diversion and retaining structure 4.

[0057] III. Place the bottom drainage branch pipe 713 on the riverbed 2 between the soil retaining device 41 and the main body 1 of the levee, and install the bottom drainage main pipe 723 and the bottom pore water pressure gauge 743. The buried elevation of the bottom pore water pressure gauge 743 is the same as that of the bottom drainage branch pipe 713, and the bottom pore water pressure gauge 743 is closely attached to the bottom drainage branch pipe 713.

[0058] IV. Backfill coarse sand at the bottom between the diversion soil retaining structure 4 and the main body 1 of the levee and compact it. The top height of the coarse sand layer 61 should exceed the elevation of the bottom drainage branch pipe 713.

[0059] V. Backfill a certain thickness of fill layer 62 on the coarse sand layer 61, and arrange the middle drainage main pipe 722, the middle drainage branch pipe 712, and the middle pore water pressure gauge 742; after backfilling a certain thickness of fill layer 62 again, arrange the upper drainage main pipe 721, the upper drainage branch pipe 711, and the upper pore water pressure gauge 741; after backfilling a certain thickness of fill layer 62 again, install the vacuum membrane 43, and cover a certain thickness of fill layer 62 on the vacuum membrane 43.

[0060] VI. Continuously collect and monitor the readings of the upper, middle, and bottom pore water pressure gauges by using the intelligent control platform 77. When water pressure is detected, start the pump of the corresponding layer for drainage, and control the pressure of the pump at 40 kPa - 80 kPa. When there is no pore water detected by the upper pore water pressure gauge 741 and the middle pore water pressure gauge 742 and the surface settlement of the widened levee 6 is less than 1 mm / d, turn off the upper pump 731 and the middle pump 732.

[0061] VII. Prepare the reinforcement liquid by using the slurry mixing barrel 75, connect the grouting pipe 76 to the upper pump 731 and the middle pump 732 in sequence, and turn on the reverse operation mode of the pump. Transport the reinforcement liquid to the corresponding positions of the fill layer 62 through the corresponding drainage main pipe and drainage branch pipe. After the reinforcement liquid hardens, a solidified body is formed in the widened levee 6, which can further improve the stability of the widened levee 6.

[0062] VIII. Continuously collect and monitor the readings of the bottom pore water pressure gauge 743 by using the intelligent control platform 77. When water pressure is detected, start the bottom pump 733 for pumping water, and turn off the bottom pump 733 when there is no pore water.

[0063] The following elaborates in detail the construction method of an intelligent control and stability - increasing diversion soil retaining system for rapid consolidation of widened levees proposed by the present invention through a case.

[0064] Case: As Figure 7As shown in the figure, for a certain pumping station project, a diversion retaining wing wall needs to be set along the existing main body of the dike 1. The diversion retaining wing wall is planned to be cast with concrete. In the past, most schemes drained the seepage water on the side of the existing main body of the dike 1 by setting drainage holes on the diversion retaining wing wall to ensure the stability and safety of the existing main body of the dike 1. However, the drainage holes will be blocked during service, resulting in poor drainage; after the pumping station operates, there will be river water 5 on the side of the structure, and the river water 5 on the side of the structure may even pour into the existing main body of the dike 1 through the drainage holes, which is extremely unfavorable to the stability of the existing main body of the dike 1. At the same time, the top width of the existing main body of the dike 1 is 3m. According to the upgrading plan, the top of the dike needs to be widened to 6m; after the diversion retaining wing wall 4, the dredged soil in the river channel is planned to be used as backfill soil, and the current moisture content of the dredged soil is relatively high, about 40% - 60%. The design data shows that the elevation of the existing riverbed 2 is +4.15m, the height of the existing main body of the dike 1 is about 3m, the slope ratio of the existing main body of the dike 1 on the side of the wing wall is about 1:1, and the slope ratio on the other side is about 1:1.5. The diversion retaining structure 4 of the present invention is used for on-site tests, and the length of the test section (along the dike direction) is about 5m.

[0065] Step 1: Use engineering measures such as cofferdams to block the river water 5 on the side of the structure, create a relatively dry construction condition for the construction of the diversion retaining structure 4, and level the riverbed 2 site at the bottom of the diversion retaining structure 4.

[0066] Step 2: Pour the diversion retaining structure 4 on-site according to the design scheme. The specifications and dimensions of the diversion retaining structure 4 are shown in Figure 8 and install the intelligent control platform 77 on the diversion retaining structure 4.

[0067] Among them, the anti-scour structure 42 is composed of geotextile tube bags filled with dredged soil. The diameter of the geotextile tube bags is 10cm and the length is 2m; the vacuum membrane 43 is a flexible sealing film commonly used for treating the foundation by the vacuum preloading method. The width of the film is 3m and the length is 5m. About 30cm of the width direction is embedded downward; the diameters of the wire passing holes 413, drain pipe holes 414, and grouting pipe holes 415 on the retaining device 41 are all 3cm, and they are located on the middle cross-section of the retaining device 41 in the direction along the dike.

[0068] Step 3: Place the bottom drainage branch pipe 713 on the riverbed 2 between the retaining device 41 and the main body of the dike 1, and install the bottom drainage main pipe 723 and the bottom pore water pressure gauge 743. The buried elevation of the bottom pore water pressure gauge 743 is the same as that of the bottom drainage branch pipe 713, and the bottom pore water pressure gauge 743 is closely attached to the bottom drainage branch pipe 713. Backfill coarse sand between the diversion retaining structure 4 and the main body of the dike 1 and compact it. The top elevation of the coarse sand layer 61 should exceed the elevation of the bottom drainage branch pipe 713. In this implementation case, for the convenience of water collection, the top elevation of the coarse sand layer 61 is about 50cm higher than the riverbed 2. The length of the single-sided bottom drainage branch pipe 713 is 2m, the outer diameter of the drainage branch pipe is 3cm, and the diameter of the small holes on it is 0.5cm.

[0069] Step 4: Backfill about 1 m thick dredged soil 62 on the coarse sand layer 61, and arrange the middle-layer main drainage pipe 722, middle-layer branch drainage pipe 712 and middle-layer pore water pressure gauge 742; after backfilling about 1 m thick dredged soil 62 again, arrange the upper-layer main drainage pipe 721, upper-layer branch drainage pipe 711 and upper-layer pore water pressure gauge 741; after backfilling about 40 cm thick dredged soil 62 again, arrange the vacuum membrane 43, and cover about 10 cm thick dredged soil 62 on the vacuum membrane 43. In this embodiment, the measuring range of the pore water pressure gauge is 0 - 0.05 MPa, the accuracy is 1%, and the outer diameter of the main drainage pipe is 3 cm.

[0070] Step 5: Continuously collect and monitor the readings of the upper-layer, middle-layer and bottom-layer pore water pressure gauges by using the intelligent control platform 77. When water pressure is detected, start the pump of the corresponding layer for drainage, and the pressure of the pump is controlled at 80 kPa. At the same time, use a level to monitor the ground settlement of the widened dike 6. After 13 days of pumping, the water discharge of the upper-layer pump 731, middle-layer pump 732 and bottom-layer pump 733 all decreases significantly. Among them, the reading of the upper-layer pore water pressure gauge 741 is 1.1 kPa, and the reading of the middle-layer pore water pressure gauge 742 is 1.2 kPa. The small value indicates that there is less pore water near the pore water pressure gauge. At the same time, the ground settlement rates of the widened dike 6 for three consecutive days are 0.8 mm / d, 0.6 mm / d, and 0.8 mm / d respectively, all less than 1 mm / d. Therefore, the upper-layer pump 731 and middle-layer pump 732 are turned off.

[0071] Step 6: Prepare the reinforcement liquid by using the slurry mixing tank 75. The reinforcement liquid is selected as cement slurry, the cement is ordinary Portland cement with a grade of 42.5R, and the water-cement ratio is 0.45. Connect the grouting pipe 76 to the upper-layer pump 731 and middle-layer pump 732 in sequence, and inject the reinforcement liquid into the corresponding main drainage pipe and branch drainage pipe. The strength of the reinforcement liquid can reach the design strength after hardening for 28 days, and the solidified body formed in the widened dike 6 can further improve the stability of the widened dike 6.

[0072] Among them, the initial setting time of the cement slurry is about 1 hour. To ensure the reinforcement effect, the grouting work is required to be completed within 30 minutes after the preparation of the cement slurry.

[0073] Step 7: Continuously collect and monitor the readings of the bottom-layer pore water pressure gauge 743 by using the intelligent control system 77. When the bottom-layer pore water pressure gauge 743 detects water pressure, start the bottom-layer pump 733 for pumping water, and turn off the bottom-layer pump 733 when there is no pore water.

[0074] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.

Claims

1. An intelligent control stabilization diversion and retaining system for rapid consolidation and widening of embankments, the embankment comprising an embankment body and a riverbed, characterized in that: include: A soil retaining device having a diversion cavity penetrating the outside, wherein the soil retaining device is arranged on the riverbed; A widening embankment is arranged between the retaining device and the embankment body; A drainage device, comprising a drainage pipe and a pump connected to the drainage pipe, wherein one end of the drainage pipe is arranged in the widened embankment, and the other end of the drainage pipe extends into the diversion cavity, and when pore water exists in the widened embankment, the widened embankment is drained through the drainage pipe; A grouting pipe, one end of which passes through the retaining device and extends to the external space, and when the widened embankment is reinforced, the other end of the grouting pipe is connected to the pump.

2. According to claim 1, the intelligent control stabilization diversion and retaining system for rapid consolidation and widening of embankments is characterized by: The widened embankment comprises a coarse sand layer and a fill layer, and along the height direction of the retaining device, the coarse sand layer and the fill layer are stacked from bottom to top.

3. The intelligent control stabilization diversion and retaining system for rapid consolidation and widening of embankments according to claim 2 is characterized by: The drainage pipe includes a first drainage main pipe and at least one second drainage main pipe, one end of the first drainage main pipe is arranged in the coarse sand layer, and the other end of the first drainage main pipe extends into the diversion cavity, one end of at least one second drainage main pipe is distributed in the fill layer, and the other end of the second drainage main pipe extends into the diversion cavity, and in the diversion cavity, the first drainage main pipe and the second drainage main pipe are connected to corresponding pumps.

4. The intelligent control stabilization diversion and retaining system for rapid consolidation and widening of embankments according to claim 3 is characterized by: The drainage pipe further includes a first drainage branch pipe and a second drainage branch pipe, wherein the first drainage branch pipe intersects with the first drainage main pipe, and the second drainage branch pipe intersects with the second drainage main pipe.

5. The intelligent control stabilization diversion and retaining system for rapid consolidation and widening of embankments according to claim 3 is characterized by: The drainage device also includes an intelligent control platform and a pore water pressure gauge. The first drainage main pipe and the second drainage main pipe are both provided with a pore water pressure gauge. The pore water pressure gauge is used to measure the pore water pressure in the soil. The intelligent control platform is used to collect the readings of the pore water pressure gauge and start and shut down the pump according to the readings of the pore water pressure gauge.

6. The intelligent control stabilization diversion and retaining system for rapid consolidation and widening of embankments according to claim 1 is characterized by: The pump has a forward operation mode and a reverse operation mode. When pore water exists in the widened embankment, the forward operation mode of the pump is turned on to drain the widened embankment. When the widened embankment is to be reinforced, the reverse operation mode of the pump is turned on to transport reinforcement fluid to the widened embankment.

7. The intelligent control stabilization diversion and retaining system for rapid consolidation and widening of embankments according to claim 1 is characterized by: An open channel is arranged on a side of the retaining device facing away from the riverbed.

8. The intelligent control stabilization diversion and retaining system for rapid consolidation and widening of embankments according to claim 2 is characterized by: It also includes a vacuum membrane, which is built into one end of the filling layer away from the coarse sand layer, and the two ends of the vacuum membrane are respectively connected to the embankment body and the retaining device.

9. A construction method of an intelligent control stabilization diversion and retaining system for rapid consolidation and widening of embankments according to any one of claims 1 to 8, characterized in that: The method includes: Step S11, installing a retaining device on the riverbed, placing the first drainage branch pipe on the riverbed between the retaining device and the main body of the embankment, and installing the first drainage main pipe and the pore water pressure gauge, wherein the buried elevation of the pore water pressure gauge is the same as that of the first drainage branch pipe, and the pore water pressure gauge is close to the first drainage branch pipe; Step S12, backfilling coarse sand from bottom to top on the riverbed between the retaining device and the main body of the embankment and compacting it to form a coarse sand layer, wherein the top height of the coarse sand layer exceeds the elevation of the first drainage branch pipe; Step S13, backfilling a set thickness of backfill on the coarse sand layer to form a backfill layer, and arranging at least one second drainage main pipe, a second drainage branch pipe and a pore water pressure gauge, and after backfilling the set thickness of backfill, arranging a vacuum membrane, and covering the vacuum membrane with a set thickness of backfill, wherein both ends of the vacuum membrane are respectively connected to the embankment body and the retaining device; Step S14, start the forward operation mode of all pumps to drain the widened embankment, so that the vacuum membrane is tightened and squeezed to drain the widened embankment. In the process of draining the widened embankment, continuously collect the reading of the pore water pressure gauge on the second drainage main pipe. When the pore water pressure gauge detects the presence of pore water in the fill layer, the widened embankment is drained by starting the forward operation mode of the pump connected to the second drainage main pipe until the pore water pressure gauge detects the absence of pore water and the surface settlement of the widened embankment is less than the set threshold, and then stop draining; Step S15, connect the grouting pipe to the corresponding pump, and start the reverse operation mode of the pump, and transport the reinforcement liquid to the corresponding position of the fill layer through the corresponding second drainage main pipe and the second drainage branch pipe, and continuously collect the reading of the pore water pressure gauge on the first drainage main pipe during the drainage and consolidation process of the fill layer. When the pore water pressure gauge detects the presence of pore water in the coarse sand layer, the widened embankment is drained by starting the forward operation mode of the pump connected to the first drainage main pipe until the pore water pressure gauge detects the absence of pore water.

10. The construction method of the intelligent control stabilization diversion and retaining system for rapid consolidation and widening of embankments according to claim 9 is characterized in that: In steps S14 and S15, when the pore water pressure gauge detects the presence of pore water in the widened embankment and the pump cannot pump out water due to blockage, the forward operation mode of the pump is turned off, and the reverse operation mode of the pump is started to pump air into the corresponding drainage pipe to flush the blockage.

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