Silty soil layer shaking precipitation system

Abstract

This application provides a shaking dewatering system for silty soil layers, relating to the field of geotechnical engineering technology. The shaking dewatering system for silty soil layers includes multiple sets of well pipes and filter pipes. The filter pipes are installed in multiple sets of installation holes drilled in the silty soil layer. Each filter pipe has a well pipe welded to its upper end, and each well pipe has a vibratory hammer installed at its end. The upper ends of the multiple well pipes are connected to a main water collection pipe via multiple connecting pipes. The outlet of the main water collection pipe is connected to a negative pressure vacuum pump via a pipeline. This invention installs the well pipes and filter pipes in the installation holes and installs a vibratory hammer at the end of the well pipe. The vibration force generated by the vibratory hammer effectively breaks down the cohesion and friction between the particles in the silty soil layer, making it easier for water to seep out of the soil and be filtered through the filter pipes. Combined with the suction of the negative pressure vacuum pump, the water is discharged, accelerating the water discharge rate and increasing the permeability of the soil, significantly improving the soil dewatering efficiency.

Description

Technical Field

[0001] This application relates to the field of geotechnical engineering technology, and more specifically, to a shaking and dewatering system for silty soil layers. Background Technology

[0002] In foundation pit excavation projects, especially in environments rich in silty soil, soil dewatering is a crucial step. Silty soil is characterized by being water-rich but impermeable, with a low permeability coefficient. During foundation pit excavation, it tends to exhibit a fluid-plastic state, posing numerous challenges to construction.

[0003] While traditional vacuum dewatering methods can dry the soil to some extent, their effectiveness is limited for this special type of soil, often failing to achieve the desired dewatering effect, leading to significant risks and inconveniences during the excavation of the foundation pit.

[0004] Therefore, this invention proposes a shaking dewatering system for silty soil layers. A vibratory hammer is installed at the end of the well casing. The vibration force generated by the hammer breaks down the cohesion and friction between soil particles, making it easier for water to seep out of the soil and be discharged through a filter pipe. Combined with the suction effect of a negative pressure vacuum pump, the water discharge rate can be significantly accelerated, increasing the permeability of the soil and thus greatly improving the soil dewatering efficiency, shortening the excavation time, and creating favorable conditions for subsequent soil removal.

[0005] However, in practical applications, traditional fixing methods often fail to provide sufficient stability, which may cause the vibratory hammer to loosen or even fall off during long-term vibration. This not only affects the construction progress but may also pose safety hazards to equipment and personnel. In addition, directly clamping the well casing may damage the well casing, affecting its service life and sealing performance. Summary of the Invention

[0006] This application aims to address at least one of the technical problems existing in the prior art: while vacuum dewatering methods can drain soil to a certain extent, their effectiveness is limited for this particular soil type, often failing to achieve the desired dewatering effect, leading to significant risks and inconveniences during foundation pit excavation. Therefore, this application proposes a shaking dewatering system for silty soil layers.

[0007] According to an embodiment of this application, the silty soil layer shaking dewatering system includes multiple sets of well pipes and filter pipes. The multiple sets of filter pipes are respectively installed in multiple sets of installation holes drilled in the silty soil layer. The upper end of each filter pipe is connected to a well pipe by welding. The end of each well pipe is equipped with a vibratory hammer. The upper ends of the multiple sets of well pipes are respectively connected to a main water collection pipe through multiple sets of connecting pipes. The outlet of the main water collection pipe is connected to a negative pressure vacuum pump through a pipeline.

[0008] Furthermore, the outlet end of the negative pressure vacuum pump is connected to a drain pipe, and the outlet end of the drain pipe is laid to the water collection pit.

[0009] Furthermore, the gap between the mounting hole and the well pipe is filled with filter material.

[0010] Furthermore, the vibratory hammer is powered by a power module, and its use is controlled by a control system.

[0011] Furthermore, a fixed end sleeve is fixedly provided on one side of the vibratory hammer. The fixed end sleeve has a ring structure, and one side of the fixed end sleeve is fixed to the well pipe by bolts.

[0012] Furthermore, a fixed bottom sleeve is fitted onto the well pipe on the lower side of the fixed end sleeve, and one side of the fixed bottom sleeve is fixed to the well pipe by bolt two.

[0013] Furthermore, the lower side of the fixed end sleeve is provided with multiple sets of positioning rods, and the upper side of the fixed bottom sleeve is provided with multiple sets of insertion holes, with the positioning rods and insertion holes being inserted into each other.

[0014] Furthermore, both sides of the fixed end sleeve and the fixed bottom sleeve are provided with sliding holes, and a sliding rod is slidably installed in each sliding hole, with an arc plate fixedly connected to one end of the sliding rod.

[0015] Furthermore, an elastic inner pad is provided on the inner side of the arc plate, and anti-slip stripes are provided on one side of the elastic inner pad.

[0016] Furthermore, a spring is fitted onto the slide rod between the arc plate and the inner wall of the fixed end sleeve.

[0017] 1. The beneficial effects of this application are as follows: By installing the well pipe and filter pipe in the installation hole and installing a vibratory hammer at the end of the well pipe, the excitation force generated by the vibratory hammer effectively breaks down the cohesion and friction between the particles of the silty soil layer, making it easier for water to seep out of the soil and be filtered through the filter pipe. Combined with the suction of the negative pressure vacuum pump, the water is discharged, which significantly accelerates the water discharge speed and increases the permeability of the soil, thereby greatly improving the soil dewatering efficiency, shortening the foundation pit excavation time, and creating favorable conditions for subsequent soil transportation. At the same time, the system can flexibly adjust the vibration frequency and amplitude according to the actual engineering conditions, avoiding problems such as ground settlement caused by excessive vibration, and enhancing construction safety. The vibratory hammer has a simple structure and is easy to maintain, ensuring the continuity of dewatering work and the safe operation of the equipment. Its wide application and multi-functional application characteristics also improve the feasibility and economy of the overall construction plan, resulting in a significant improvement in the quality and efficiency of the entire project.

[0018] 2. The beneficial effects of this application are: by fixing the vibratory hammer to the well pipe through the fixed end sleeve and the fixed bottom sleeve, and by inserting the rod into the insertion hole, the stability of the vibratory hammer during use is further improved, and the vibratory hammer is prevented from falling off due to long-term vibration. At the same time, the well pipe is clamped by the arc plate and the elastic inner pad, and the use of springs not only improves the stability of the vibratory hammer when it is fixed, but also avoids damage to the well pipe.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the installation hole structure of the silty soil layer shaking and dewatering system according to Embodiment 1 of this application;

[0022] Figure 2 This is a schematic diagram of the backfill filter media according to Embodiment 1 of this application;

[0023] Figure 3 This is a schematic diagram of the installation state of the vibratory hammer according to Embodiment 1 of this application;

[0024] Figure 4 This is a schematic diagram of the installation of a negative pressure vacuum pump according to Embodiment 1 of this application;

[0025] Figure 5 This is a schematic diagram of the shaking junction reaction state according to Embodiment 1 of this application;

[0026] Figure 6 This is a schematic diagram of the multi-stage anti-backflow vacuum precipitation process according to Embodiment 1 of this application;

[0027] Figure 7 This is a schematic diagram of the vibratory hammer and well casing structure according to Embodiment 2 of this application;

[0028] Figure 8 This is a schematic diagram showing the disassembled structure of the fixed end sleeve and fixed bottom sleeve according to Embodiment 2 of this application;

[0029] Figure 9 This is a schematic diagram showing the disassembled structure of the fixed base sleeve and arc plate according to Embodiment 2 of this application;

[0030] Figure 10This is a top view of the fixed end sleeve structure according to Embodiment 2 of this application.

[0031] Icons: 1. Mounting hole; 2. Well pipe; 3. Filter pipe; 4. Filter media; 5. Main water collection pipe; 6. Vibratory hammer; 7. Negative pressure vacuum pump; 8. Drain pipe; 9. Connecting pipe; 10. Fixed end sleeve; 11. Bolt one; 12. Positioning rod; 13. Fixed bottom sleeve; 14. Insertion hole; 15. Bolt two; 16. Sliding hole; 17. Arc plate; 18. Sliding rod; 19. Spring; 20. Elastic inner pad. Detailed Implementation

[0032] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The following describes a silty soil layer shaking and precipitation system according to an embodiment of this application, with reference to the accompanying drawings.

[0041] Example 1

[0042] like Figures 1-6 As shown, the silty soil layer shaking dewatering system according to an embodiment of this application includes multiple sets of well pipes 2 and filter pipes 3. The multiple sets of filter pipes 3 are respectively installed in multiple sets of installation holes 1 drilled in the silty soil layer. According to geological conditions and design requirements, a suitable drilling method, such as rotary drilling or percussion drilling, is selected to drill multiple sets of installation holes 1 in the silty soil layer. During the drilling process, the drilling speed and drilling parameters are controlled to ensure that the verticality and diameter of the borehole meet the design requirements. After drilling to the design depth, the borehole is cleaned to remove sediment from the bottom of the hole and ensure that the bottom of the hole is clean.

[0043] Each filter tube 3 is connected to a well tube 2 by welding at its upper end. Each well tube 2 is equipped with a vibrating hammer 6 at its end. The gap between the mounting hole 1 and the well tube 2 is filled with filter media 4. The particle size of the filter media 4 meets the design requirements, and the filling height should meet the design specifications to ensure a good filtration effect.

[0044] The vibratory hammer 6 is powered by a power module and its use is controlled by a control system. The power module can be a motor, and the control system is a device with an integrated central processing unit that can control the vibration frequency and amplitude of the vibratory hammer 6 to perform continuous vibration according to design requirements.

[0045] The upper ends of multiple sets of well pipes 2 are connected to the main water collection pipe 5 through multiple sets of connecting pipes 9. The outlet of the main water collection pipe 5 is connected to the negative pressure vacuum pump 7 through a pipe. The outlet of the negative pressure vacuum pump 7 is connected to a drain pipe 8, and the outlet of the drain pipe 8 is laid to the water collection pit.

[0046] During operation, the vibratory hammer 6 is debugged, and parameters such as vibration frequency and amplitude are adjusted to achieve the best working state. The vibration effect and impact on the soil can be observed through simulation tests. The parameters are optimized according to the actual situation. The vibratory hammer 6 is started and vibrated continuously according to the vibration frequency and amplitude required by the design. During the vibration process, the operation of the vibratory hammer 6 and the reaction of the surrounding soil are closely observed.

[0047] The vibration parameters should be adjusted in a timely manner according to the properties of the soil and the effect of precipitation. Generally, the initial vibration frequency can be appropriately low, and the vibration frequency should be gradually increased as the soil gradually loosens.

[0048] The vibration time is determined according to the actual situation of the project. Generally, each vibration lasts for a certain period of time, such as 10-30 minutes, and then the next vibration is carried out after a certain interval of time, such as 1-2 hours, until the expected precipitation effect is achieved.

[0049] In addition, a sump pit can be set up at a suitable location around the precipitation area. The size and depth of the sump pit should be determined according to the catchment area and drainage volume. The sump pit should be treated with anti-seepage measures to prevent groundwater leakage.

[0050] The drainage pipe 8 should have a certain slope to ensure smooth drainage, and all pipe connections should be well sealed to prevent leakage. Multiple water level observation holes should be set up in the dewatering area to regularly monitor changes in the groundwater level. Based on water level changes, the construction parameters of the vibratory dewatering should be adjusted promptly to ensure the groundwater level drops to the design depth. Soil deformation observation points should be set up around the dewatering area to monitor soil settlement, displacement, and other deformation. When soil deformation exceeds the allowable value, the vibratory dewatering operation should be stopped immediately, the cause analyzed, and appropriate measures taken. The vibration frequency, amplitude, and other parameters of the vibratory hammer 6 should be monitored in real time to ensure they remain within the design range.

[0051] Wastewater generated during construction is treated to meet standards before being discharged. Water in the collection pit can be treated through sedimentation and other processes before being used for dust suppression and other purposes at the construction site.

[0052] The working principle of the vibratory hammer 6: The periodic impact force generated by the vibratory hammer 6 is applied to the dewatering well pipe or the surrounding soil. The vibratory hammer 6 is generally composed of an electric motor, an eccentric block, etc. When the electric motor rotates at high speed, the eccentric block generates centrifugal force, forming a vertical excitation force.

[0053] Example 2

[0054] like Figures 7 to 10 As shown, considering that the vibratory hammer 6 is usually installed at the end of the well pipe 2 by bolts, this installation method is relatively structural and is prone to falling off after long-term vibration. Therefore, in order to overcome the problem of insufficient stability caused by bolt fixing when the vibratory hammer 6 is installed at the end of the well pipe 2 in the prior art, this design fixes a fixing end sleeve 10 on one side of the vibratory hammer 6. The fixing end sleeve 10 has a ring structure and one end is open, which can be easily fitted onto the end of the well pipe 2. One side of the fixing end sleeve 10 is firmly fixed to the well pipe 2 by bolt 11, thereby ensuring that the vibratory hammer 6 is reliably fixed to the well pipe 2.

[0055] Furthermore, to enhance the stability and support capacity of the entire fixed structure, a fixed bottom sleeve 13 is fitted onto the well pipe 2 below the fixed end sleeve 10. One side of the fixed bottom sleeve 13 is fixed to the well pipe 2 by bolts 15, forming a double fixing mechanism. At the same time, multiple sets of positioning rods 12 are provided on the lower side of the fixed end sleeve 10, and multiple sets of insertion holes 14 are opened on the upper side of the fixed bottom sleeve 13. The positioning rods 12 are inserted into the insertion holes 14 to ensure a tight connection between the fixed end sleeve 10 and the fixed bottom sleeve 13, thereby providing additional support force and preventing the vibratory hammer 6 from loosening or falling off during long-term vibration.

[0056] In addition, in order to further improve the support effect of the fixed end sleeve 10 and the fixed bottom sleeve 13 on the vibratory hammer 6, sliding holes 16 are provided on both sides inside the fixed end sleeve 10 and the fixed bottom sleeve 13. A sliding rod 18 is slidably arranged in each sliding hole 16. One end of the sliding rod 18 is fixedly connected to an arc plate 17. These arc plates 17 are designed to conform to the shape of the outer wall of the well pipe 2, ensuring maximum contact area and thus providing a more uniform clamping force.

[0057] An elastic inner pad 20 is provided on the inner side of the arc plate 17. The elastic inner pad 20 is made of a highly elastic material, which can adapt to the slight unevenness of the surface of the well pipe 2 and provide a good cushioning effect to prevent direct hard contact from damaging the well pipe 2. Anti-slip stripes are provided on one side of the elastic inner pad 20, which increases the coefficient of friction and significantly improves the tightness between the elastic inner pad 20 and the outer wall of the well pipe 2, ensuring that no relative sliding occurs during vibration.

[0058] A spring 19 is fitted on the slide rod 18 between the arc plate 17 and the inner wall of the fixed end sleeve 10. When the well pipe 2 enters between the two arc plates 17, the well pipe 2 will push the arc plate 17 outward, causing the slide rod 18 to slide outward along the slide hole 16 and squeeze the spring 19. As the spring 19 is compressed, the reaction force generated by it will cause the arc plate 17 to apply a greater clamping force to the well pipe 2, thereby increasing the fixing effect of the arc plate 17 on the well pipe 2. This design allows the system to be dynamically adjusted according to the actual size of the well pipe 2. No matter how slight the diameter of the well pipe 2 is deviated, it can be automatically compensated by the elastic deformation of the spring 19 to ensure the best fixing effect.

[0059] In addition to the aforementioned arc plate 17 and spring 19 mechanism, the fixed end sleeve 10 is fixed to the well pipe 2 by bolt 11, while the fixed bottom sleeve 13 is fixed to the well pipe 2 by bolt 25, forming a double fixing mechanism. The insertion and engagement of the positioning rod 12 and the insertion hole 14 further enhances the connection strength between the fixed end sleeve 10 and the fixed bottom sleeve 13, ensuring the stability of the entire fixing structure. The elastic inner pad 20 set inside the fixed end sleeve 10 and the fixed bottom sleeve 13 not only provides excellent cushioning effect, but also effectively prevents wear or scratches caused by vibration, extending the service life of the well pipe 2.

[0060] The above design not only solves the loosening problem in traditional fixing methods, but also improves the reliability and durability of the entire system, ensuring efficient operation in complex construction environments. It provides a more reliable guarantee for foundation pit excavation and soil dewatering. This innovation not only improves construction efficiency, but also reduces maintenance costs, resulting in a significant improvement in the quality and efficiency of the entire project.

[0061] The working process of the silty soil layer shaking dewatering system is as follows: First, according to the geological conditions and design requirements, a suitable drilling method is selected, and multiple sets of installation holes 1 are drilled in the silty soil layer. The filter pipes 3 are installed in each installation hole 1. The upper end of each filter pipe 3 is connected to the well pipe 2 by welding. The gap between the well pipe 2 and the installation hole 1 is filled with filter material 4 with a particle size that meets the design requirements. Next, the vibratory hammer 6 is installed at the end of each well pipe 2. The vibratory hammer 6 is firmly fixed by the fixed end sleeve 10 and the fixed bottom sleeve 13, and by bolts 11 and 25. At the same time, the positioning rod 12 is set to be inserted into the insertion hole 14 to enhance stability. The clamping force and buffering effect are further improved by the sliding rod 18, the arc plate 17, the spring 19 and the elastic inner pad 20 to prevent damage to the well pipe 2.

[0062] Afterwards, the upper ends of multiple sets of well pipes 2 are connected to the main water collection pipe 5 through connecting pipes 9. The outlet of the main water collection pipe 5 is connected to the negative pressure vacuum pump 7 through a pipeline. The outlet of the negative pressure vacuum pump 7 is connected to the drain pipe 8 and laid to the water collection pit. During operation, the vibration hammer 6 is adjusted to adjust the vibration frequency and amplitude and other parameters to achieve the best working state. The vibration hammer 6 is started to vibrate continuously according to the design requirements.

[0063] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0064] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A silty soil layer shaking and dewatering system, characterized in that: It includes multiple sets of well pipes (2) and filter pipes (3). The multiple sets of filter pipes (3) are respectively installed in multiple sets of installation holes (1) drilled in the silty soil layer. The upper end of each filter pipe (3) is connected to a well pipe (2) by welding. The end of each well pipe (2) is equipped with a vibratory hammer (6). The upper ends of the multiple sets of well pipes (2) are respectively connected to the main water collection pipe (5) through multiple sets of connecting pipes (9). The outlet of the main water collection pipe (5) is connected to the negative pressure vacuum pump (7) through a pipeline.

2. The silty soil layer shaking and dewatering system according to claim 1, characterized in that: The outlet end of the negative pressure vacuum pump (7) is connected to a drain pipe (8), and the outlet end of the drain pipe (8) is laid to the water collection pit.

3. The silty soil layer shaking and dewatering system according to claim 2, characterized in that: The gap between the mounting hole (1) and the well pipe (2) is filled with filter material (4).

4. The silty soil layer shaking and dewatering system according to claim 3, characterized in that: The vibratory hammer (6) is powered by a power module, and its use is controlled by a control system.

5. The silty soil layer shaking and dewatering system according to claim 1, characterized in that: A fixed end sleeve (10) is fixedly installed on one side of the vibratory hammer (6). The fixed end sleeve (10) has a ring structure, and one side of the fixed end sleeve (10) is fixed to the well pipe (2) by bolt (11).

6. The silty soil layer shaking and dewatering system according to claim 5, characterized in that: A fixed bottom sleeve (13) is fitted on the well pipe (2) below the fixed end sleeve (10), and one side of the fixed bottom sleeve (13) is fixed to the well pipe (2) by bolt two (15).

7. The silty soil layer shaking and dewatering system according to claim 6, characterized in that: The lower side of the fixed end sleeve (10) is provided with multiple sets of positioning rods (12), and the upper side of the fixed bottom sleeve (13) is provided with multiple sets of insertion holes (14). The positioning rods (12) and the insertion holes (14) are inserted and engaged.

8. The silty soil layer shaking and dewatering system according to claim 7, characterized in that: The fixed end sleeve (10) and the fixed bottom sleeve (13) are provided with sliding holes (16) on both sides. Each sliding hole (16) is provided with a sliding rod (18), and one end of the sliding rod (18) is fixedly connected to an arc plate (17).

9. The silty soil layer shaking and dewatering system according to claim 8, characterized in that: An elastic inner pad (20) is provided on the inner side of the arc plate (17), and anti-slip stripes are provided on one side of the elastic inner pad (20).

10. The silty soil layer shaking and dewatering system according to claim 9, characterized in that: A spring (19) is fitted on the slide rod (18) between the arc plate (17) and the inner wall of the fixed end sleeve (10).

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