Preloading soft foundation treatment structure

Abstract

The utility model provides a preloading soft foundation treatment structure which is arranged on a soft foundation, a cofferdam is arranged on the soft foundation, and the preloading soft foundation treatment structure comprises a sand cushion layer, a heat conducting plate, a preloading layer, a drainage conveying mechanism and a water storage heating mechanism. The sand cushion layer is laid on the soft foundation and located in the cofferdam. The heat conducting plate is arranged on the sand cushion layer and is provided with a heat conducting pipeline; the stacking layer is arranged on the heat conducting plate; the drainage conveying mechanism comprises a water collecting pipe, a main drainage pipe and a water suction pump, the water collecting pipe is inserted into the soft foundation and communicates with the main drainage pipe, water seepage holes are formed in the water collecting pipe, and the main drainage pipe communicates with the water suction pump; the water storage heating mechanism comprises a water storage tank, a heating device and a drainage pump, the water storage tank is arranged on the stacking layer and communicated with the water suction pump, the heating device is used for heating water in the water storage tank, the water storage tank and the heat conduction pipeline form a circulation loop, and the drainage pump is used for driving the water in the water storage tank to flow in the circulation loop.

Description

Technical Field

[0001] This utility model relates to the field of soft soil treatment technology, and in particular to a surcharge preloading soft soil treatment structure. Background Technology

[0002] Soft soil foundations refer to weak soil layers with low strength and high compressibility. Direct road construction and building on soft soil foundations often pose significant risks, necessitating reinforcement. Existing methods for soft soil foundation reinforcement generally involve surcharge preloading. Surcharge preloading involves applying a load to a saturated soft soil foundation, causing pore water to be slowly expelled, reducing pore volume and inducing consolidation deformation. Simultaneously, as excess hydrostatic pressure gradually dissipates, effective stress gradually increases, and the soil strength gradually increases until a predetermined standard is reached. Unloading then occurs, resulting in soil compaction, settlement, and consolidation.

[0003] Chinese utility model patent CN210562113U discloses a surcharge preloading soft soil foundation treatment structure. This structure includes a foundation to be surcharged, a sand cushion layer on the upper surface of the foundation, a surcharge material on the upper surface of the sand cushion layer, and water collection troughs around the foundation. Each water collection trough contains a water storage layer for collecting pore water, and the water storage layer is connected to a pumping device placed on the ground. This surcharge preloading soft soil foundation treatment structure can centrally collect and pump out the pore water discharged after surcharge in the soft soil, thereby reducing the risk of pore water remaining in the soil layer and causing backflow. It also allows for further treatment and recycling of the collected pore water.

[0004] However, the aforementioned patented surcharge preloading soft soil treatment structure only relies on the compression of the surcharge material to accelerate the discharge of pore water in the soft soil, resulting in low drainage efficiency. Furthermore, this surcharge preloading soft soil treatment structure lacks an effective secondary utilization mechanism for the discharged pore water. Utility Model Content

[0005] The purpose of this invention is to provide a surcharge preloading soft foundation treatment structure, which aims to solve or at least partially solve the shortcomings of the above-mentioned background technology. It can not only effectively utilize pore water as a ballast weight to increase the soft foundation and as a heat conduction medium, but also accelerate the drainage, settlement, compaction and consolidation of the soft foundation.

[0006] This utility model provides a surcharge preloading soft foundation treatment structure, which is installed on a soft foundation with a cofferdam. The surcharge preloading soft foundation treatment structure includes a sand cushion layer, a heat-conducting plate, a surcharge layer, a drainage and conveying mechanism, and a water storage and heating mechanism. The sand cushion layer is laid on the soft foundation and located inside the cofferdam. The heat-conducting plate is installed on the sand cushion layer and is attached to the upper surface of the sand cushion layer, and heat-conducting pipes are installed inside the heat-conducting plate. The surcharge layer is located on the upper surface of the heat-conducting plate. The drainage and conveying mechanism includes several water collection pipes, a main drainage pipe, and a water pump. The several water collection pipes are inserted vertically into the soft foundation. The water collection pipe is installed within the base and connected to the main drainage pipe. Several seepage holes are opened through the side wall of the water collection pipe. The main drainage pipe is buried in the sand cushion layer and located above the water collection pipe. The main drainage pipe is connected to one end of the water pump. The water storage and heating mechanism includes a water storage tank, a heating device and a drainage pump. The water storage tank is set on the upper surface of the load layer. The water storage tank is connected to the other end of the water pump. The heating device is set in the water storage tank and is used to heat the water in the water storage tank. The water storage tank and the heat conduction pipe form a circulation loop. The drainage pump is used to drive the water in the water storage tank to flow in the circulation loop.

[0007] Furthermore, the water storage tank is equipped with a cold water inlet and a hot water outlet. The cold water inlet is connected to the other end of the water pump, and the cold water inlet and hot water outlet are respectively connected to the heat conduction pipeline.

[0008] Furthermore, the heat-conducting pipeline has an inlet and an outlet. The inlet is connected to the hot water outlet via a pipeline, and the outlet is connected to the cold water inlet via a pipeline.

[0009] Furthermore, a drain pump is installed at the hot water outlet of the water storage tank.

[0010] Furthermore, the heat conduction pipes are in a continuous U-shape.

[0011] Furthermore, the heat-conducting plate is made of aluminum alloy.

[0012] Furthermore, the heating device includes an electric heating rod, a circulating water pump, and a temperature sensor. The electric heating rod is used to heat the water in the water storage tank, the temperature sensor is used to monitor the water temperature in the water storage tank, and the circulating water pump is used to promote the circulation of water in the water storage tank.

[0013] Furthermore, the water storage tank is equipped with an insulation layer, which is attached to the outer surface of the water storage tank and is made of polyurethane foam material.

[0014] Furthermore, a drain outlet is provided on the water storage tank, and a drain valve is installed at the drain outlet. A water level sensor is installed inside the water storage tank to monitor the water level height inside the tank.

[0015] Furthermore, an air vent valve is installed on the upper surface of the water storage tank.

[0016] The surcharge preloading soft soil treatment structure provided by this utility model, through the cooperation of a drainage and conveying mechanism and a water storage tank, can actively extract pore water from the soft soil using the negative pressure generated by a water pump. The pore water is sequentially recovered into the water storage tank through seepage holes, a collection pipe, and a main drainage pipe. Compared with the traditional gravity drainage method, this significantly improves drainage efficiency. Simultaneously, the water accumulated in the storage tank continuously increases its own weight, thereby continuously pressurizing the soft soil and creating a dynamic load-bearing effect, accelerating the settlement and compaction of the soft soil. Through the cooperation of a water storage heating mechanism and a heat-conducting plate, the heating device heats the water in the storage tank, the drainage pump drives the water in the storage tank to flow in a circulation loop, and the heat-conducting plate quickly and evenly transfers heat to the sand cushion layer and the soft soil, thereby accelerating the consolidation of the soft soil. In summary, this surcharge preloading soft soil treatment structure effectively utilizes pore water as a ballast weight to increase the soft soil and as a heat conduction medium for the heat-conducting plate, achieving a synergistic effect of drainage and thermal curing, accelerating the drainage, settlement, compaction, and consolidation of the soft soil. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of a surcharge preloading soft soil treatment structure according to the present invention.

[0018] Figure 2 for Figure 1 The diagram shows a water storage and heating mechanism.

[0019] Figure 3 for Figure 1 A partial schematic diagram of the drainage conveying mechanism shown.

[0020] Figure 4 for Figure 3 A magnified diagram of point A in the middle.

[0021] Figure 5 for Figure 1 The diagram shows the internal structure of the heat-conducting plate.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 10. Water storage and heating mechanism; 100. Soft foundation; 11. Water storage tank; 111. Cold water inlet; 112. Hot water outlet; 113. Insulation layer; 114. Drain outlet; 12. Heating device; 121. Electric heating rod; 122. Circulating water pump; 123. Temperature sensor; 13. Drain pump; 14. Drain valve; 15. Water level sensor; 16. Air vent valve; 20. Loading layer; 200. Cofferdam; 30. Heat-conducting plate; 31. Heat-conducting pipeline; 32. Water inlet; 33. Water outlet; 40. Sand cushion layer; 50. Drainage and conveying mechanism; 51. Water pump; 52. Main drain pipe; 53. Water collection pipe; 531. Seepage hole; 532. Filter screen. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0025] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0026] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.

[0027] Please see Figures 1-5 A surcharge preloading soft soil treatment structure is provided on a soft soil foundation 100, and a cofferdam 200 is provided on the soft soil foundation 100. The surcharge preloading soft soil treatment structure includes a sand cushion layer 40, a heat-conducting plate 30, a surcharge layer 20, a drainage and conveying mechanism 50, and a water storage and heating mechanism 10.

[0028] The sand cushion layer 40 is laid on the soft foundation 100 and located within the cofferdam 200.

[0029] The heat-conducting plate 30 is disposed on the sand pad layer 40 and is attached to the upper surface of the sand pad layer 40. The heat-conducting plate 30 is provided with heat-conducting pipes 31 inside.

[0030] The load layer 20 is disposed on the upper surface of the heat-conducting plate 30.

[0031] The drainage conveying mechanism 50 includes several water collection pipes 53, a main drainage pipe 52, and a water pump 51. The several water collection pipes 53 are inserted vertically into the soft foundation 100 and are respectively connected to the main drainage pipe 52. Several seepage holes 531 are opened through the side wall of the water collection pipes 53. The main drainage pipe 52 is buried in the sand cushion layer 40 and located above the water collection pipes 53. The main drainage pipe 52 is connected to one end of the water pump 51.

[0032] The water storage and heating mechanism 10 includes a water storage tank 11, a heating device 12, and a drain pump 13. The water storage tank 11 is located on the upper surface of the stack layer 20. The water storage tank 11 is connected to the other end of the water pump 51. The heating device 12 is located inside the water storage tank 11 and is used to heat the water inside the water storage tank 11. The water storage tank 11 and the heat conduction pipe 31 form a circulation loop. The drain pump 13 is used to drive the water inside the water storage tank 11 to flow in the circulation loop.

[0033] As described above, the surcharge preloading soft foundation treatment structure provided by this utility model, through the cooperation of the drainage conveying mechanism 50 and the water storage tank 11, can actively extract pore water from the soft foundation 100 using the negative pressure generated by the water pump 51. The pore water is then recovered to the water storage tank 11 through the seepage hole 531, the water collection pipe 53, and the main drainage pipe 52. Compared with the traditional gravity drainage method, this significantly improves drainage efficiency. At the same time, the water stored in the water storage tank 11 can continuously increase its own weight, thereby continuously pressurizing the soft foundation 100, forming a dynamic loading effect, and accelerating the settlement and compaction of the soft foundation 100. Through the cooperation of the water storage heating mechanism 10 and the heat conduction plate 30, the heating device 12 is responsible for heating the water in the water storage tank 11, and the drainage pump 13 is responsible for driving the water in the water storage tank 11 to flow in the circulation loop. The heat conduction plate 30 quickly and evenly transfers heat to the sand cushion layer 40 and the soft foundation 100, thereby accelerating the consolidation of the soft foundation 100. In summary, this surcharge preloading soft soil treatment structure effectively utilizes pore water as a ballast weight to increase the soft soil 100 and as a heat conduction medium for the heat-conducting plate 30, achieving a synergistic effect of drainage and thermal curing, and accelerating the drainage, settlement, compaction and consolidation of the soft soil 100.

[0034] Furthermore, the water storage tank 11 is equipped with a cold water inlet 111 and a hot water outlet 112. The cold water inlet 111 is connected to the other end of the water pump 51, and the cold water inlet 111 and the hot water outlet 112 are respectively connected to the heat-conducting pipe 31, thereby forming a circulation loop between the water storage tank 11 and the heat-conducting plate 30. More specifically, the heat-conducting pipe 31 has a water inlet 32 ​​and a water outlet 33. The water inlet 32 ​​is connected to the hot water outlet 112 through a pipe, and the water outlet 33 is connected to the cold water inlet 111 through a pipe.

[0035] More specifically, the drain pump 13 is installed at the hot water outlet 112 of the water storage tank 11. During operation, the drain pump 13 pumps the hot water in the water storage tank 11 into the heat conduction pipe 31 through the pipeline. The hot water flows from the inlet 32 ​​to the outlet 33 of the heat conduction pipe 31 and undergoes heat exchange during the flow in the heat conduction pipe 31. Then, it is returned to the water storage tank 11 through the cold water inlet 111 via the pipeline.

[0036] Furthermore, in this embodiment, the heat-conducting pipe 31 is in a continuous U-shape. This shape allows the heat from the hot water to be evenly transferred from the heat-conducting plate 30 to the sand pad layer 40 and the soft base 100.

[0037] More specifically, the heat-conducting plate 30 is made of aluminum alloy, which has the advantages of excellent thermal conductivity, high strength, lightweight, and corrosion resistance. Therefore, the heat-conducting plate 30 has excellent thermal conductivity, its strength can withstand the weight of the load-bearing layer 20 and the water tank 11, its light weight makes it easy for workers to move and arrange, and its good corrosion resistance makes it suitable for operation in high-temperature and high-humidity environments.

[0038] More specifically, the heating device 12 includes a heating rod 121, a circulating water pump 122, and a temperature sensor 123. The heating rod 121 is used to heat the water in the water storage tank 11, the temperature sensor 123 is used to monitor the water temperature in the water storage tank 11, and the circulating water pump 122 is used to promote the circulation of water in the water storage tank 11. During operation, the heating rod 121 heats the water in the water storage tank 11 to 80°C, the circulating water pump 122 circulates the water in the water storage tank 11 to ensure uniform water temperature, and the temperature sensor 123 continuously monitors the water temperature. When the temperature sensor 123 detects that the water temperature has reached 80°C, the heating rod 121 and the circulating water pump 122 stop working, and the drain pump 13 starts working.

[0039] Furthermore, an insulation layer 113 is provided on the water storage tank 11. The insulation layer 113 is attached to the outer surface of the water storage tank 11 and can effectively keep the water storage tank 11 warm. In this embodiment, the insulation layer 113 is made of polyurethane foam material, and the water storage tank body is made of stainless steel.

[0040] Furthermore, a drain outlet 114 is provided on the water storage tank 11, and a drain valve 14 is installed at the drain outlet 114. A water level sensor 15 is installed inside the water storage tank 11 to monitor the water level. During operation, pore water is continuously pumped into the water storage tank 11 through the water pump 51, and the water level in the water storage tank 11 continuously rises. The water level sensor 15 continuously monitors the water level in the water storage tank 11. When the water level exceeds a preset value, the drain valve 14 opens to drain the excess pore water through the drain outlet 114. The operator can collect the excess pore water in other containers for other uses.

[0041] Furthermore, an air vent valve 16 is provided on the upper surface of the water storage tank 11. The air vent valve 16 is used to release the air in the water storage tank 11 to ensure that the pore water flows smoothly into the water storage tank 11. The air vent valve 16 also serves to relieve pressure. Since the electric heating rod 121 heats the water in the water storage tank 11, the air pressure in the water storage tank 11 increases. The air vent valve 16 can release the air in the water storage tank 11 to relieve pressure and ensure the safe use of the water storage tank 11.

[0042] In addition, the water storage tank 11 also includes a controller (not shown in the figure), which is used to control the operation coordination between the heating rod 121, the circulating water pump 122, the temperature sensor 123, and the drain pump 13, as well as the operation coordination between the drain valve 14 and the water level sensor 15.

[0043] The water collection pipe 53 has a hollow structure, and several seepage holes 531 are arranged in a linear array along the vertical direction on the side wall of the water collection pipe 53. The multi-level seepage holes 531 form a gradient suction channel.

[0044] Each seepage hole 531 is equipped with a filter screen 532, which is used to intercept larger particles in the soft substrate 100 to prevent clogging of the seepage hole 531. In this embodiment, the mesh size of the filter screen 532 is 0.5 mm, which can intercept particles larger than 0.5 mm and avoid pipe blockage.

[0045] The working principle of the surcharge preloading soft soil treatment structure provided by this utility model is as follows:

[0046] The water pump 51 generates negative pressure to actively extract pore water from the soft foundation 100. The pore water is then sequentially recovered into the water storage tank 11 through the seepage hole 531, the water collection pipe 53, and the main drain pipe 52. The water accumulated in the water storage tank 11 continuously increases its own weight, thereby continuously pressurizing the soft foundation 100 and accelerating its settlement and compaction. At the same time, the electric heating rod 121 heats the water in the water storage tank 11 to 80°C, and the drain pump 13 pumps the hot water into the heat-conducting plate 30. The high thermal conductivity of the heat-conducting plate 30 rapidly and evenly transfers heat to the soft foundation 100 through the sand cushion layer 40, promoting the thermal solidification of the soft foundation 100. Throughout the process, the controller monitors the water level and water temperature of the water storage tank 11 in real time, and adjusts the start and stop of the drainage pump 13, electric heating rod 121, circulating water pump 122 and drainage valve 14 based on the monitoring data to ensure the stable operation of the surcharge preloaded soft foundation treatment structure and achieve the goal of accelerating the drainage, settlement, compaction and consolidation of the soft foundation 100.

[0047] The advantages of the surcharge preloading soft soil treatment structure provided by this utility model are as follows:

[0048] This surcharge preloading soft soil treatment structure effectively utilizes pore water as a ballast weight to increase the soft soil 100 and as a heat conduction medium for the heat-conducting plate 30, achieving a synergistic effect of drainage and thermal curing, and accelerating the drainage, settlement, compaction and consolidation of the soft soil 100.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A surcharge preloading soft soil treatment structure, disposed on a soft soil foundation (100), wherein a cofferdam (200) is disposed on the soft soil foundation (100), characterized in that, The surcharge preloading soft soil treatment structure includes: A sand cushion layer (40) is laid on the soft foundation (100) and located within the cofferdam (200); A heat-conducting plate (30) is disposed on the sand pad layer (40) and is in contact with the upper surface of the sand pad layer (40). A heat-conducting pipe (31) is provided inside the heat-conducting plate (30). A load layer (20) is disposed on the upper surface of the heat-conducting plate (30); The drainage conveying mechanism (50) includes several water collection pipes (53), a main drainage pipe (52) and a water pump (51). Several water collection pipes (53) are inserted vertically into the soft foundation (100) and are respectively connected to the main drainage pipe (52). Several seepage holes (531) are opened through the side wall of the water collection pipe (53). The main drainage pipe (52) is buried in the sand cushion layer (40) and located above the water collection pipe (53). The main drainage pipe (52) is connected to one end of the water pump (51). The water storage and heating mechanism (10) includes a water storage tank (11), a heating device (12), and a drain pump (13). The water storage tank (11) is located on the upper surface of the stack layer (20). The water storage tank (11) is connected to the other end of the water pump (51). The heating device (12) is located in the water storage tank (11) and is used to heat the water in the water storage tank (11). The water storage tank (11) and the heat conduction pipe (31) form a circulation loop. The drain pump (13) is used to drive the water in the water storage tank (11) to flow in the circulation loop.

2. The surcharge preloading soft soil treatment structure as described in claim 1, characterized in that, The water storage tank (11) is provided with a cold water inlet (111) and a hot water outlet (112). The cold water inlet (111) is connected to the other end of the water pump (51). The cold water inlet (111) and the hot water outlet (112) are respectively connected to the heat conduction pipe (31).

3. The surcharge preloading soft soil treatment structure as described in claim 2, characterized in that, The heat-conducting pipe (31) has an inlet (32) and an outlet (33). The inlet (32) is connected to the hot water outlet (112) through a pipe, and the outlet (33) is connected to the cold water inlet (111) through a pipe.

4. The surcharge preloading soft soil treatment structure as described in claim 2, characterized in that, The drain pump (13) is located at the hot water outlet (112) of the water storage tank (11).

5. The surcharge preloading soft soil treatment structure as described in claim 1, characterized in that, The heat-conducting pipe (31) is in a continuous U-shape.

6. The surcharge preloading soft soil treatment structure as described in claim 1, characterized in that, The heat-conducting plate (30) is made of aluminum alloy.

7. The surcharge preloading soft soil treatment structure as described in claim 1, characterized in that, The heating device (12) includes an electric heating rod (121), a circulating water pump (122), and a temperature sensor (123). The electric heating rod (121) is used to heat the water in the water storage tank (11), the temperature sensor (123) is used to monitor the water temperature in the water storage tank (11), and the circulating water pump (122) is used to promote the circulation of water in the water storage tank (11).

8. The surcharge preloading soft soil treatment structure as described in claim 1, characterized in that, The water storage tank (11) is provided with a heat insulation layer (113), which is attached to the outer surface of the water storage tank (11) and is made of polyurethane foam material.

9. The surcharge preloading soft soil treatment structure as described in claim 1, characterized in that, A drain outlet (114) is provided on the water storage tank (11), and a drain valve (14) is provided at the drain outlet (114). A water level sensor (15) is provided inside the water storage tank (11) to monitor the water level in the water storage tank (11).

10. The surcharge preloading soft soil treatment structure as described in claim 1, characterized in that, An air vent valve (16) is provided on the upper surface of the water storage tank (11).

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