Waterproof structure for ultra-deep foundation pit construction in urban updated industrial factory building

Abstract

The utility model provides a waterproof structure for construction of an ultra-deep foundation pit in an urban updated industrial factory building. The waterproof structure for construction of the ultra-deep foundation pit in the urban updated industrial factory building comprises a secant pile body, and a steel pipe pile support is arranged outside the secant pile body; a tube well is arranged on the outer side of the steel pipe pile support. According to the technical scheme, preliminary waterproofing is achieved through tight meshing of the secant pile body; the waterproof performance is improved through the reinforcing effect of the steel pipe pile support; the water level in the foundation pit and the leakage risk are reduced under the assistance of dewatering of the tube well; and finally, construction of multiple waterproof barriers is achieved, and construction safety and foundation pit stability are ensured.

Description

Technical Field

[0001] This application relates to the field of foundation pit engineering technology, and in particular to a waterproof structure for the construction of ultra-deep foundation pits in urban renewal industrial plants. Background Technology

[0002] The main problems in constructing ultra-deep foundation pits within existing buildings are as follows:

[0003] 1. Poor engineering geological conditions

[0004] The artificial fill thickness at the proposed site is generally around 4 meters, and the lithology is mainly silty clay fill, fine sand fill, and gravel fill. The composition of the artificial fill layer is disordered and its engineering properties are poor, which will adversely affect the design and construction of the foundation pit support.

[0005] 2. Complex groundwater conditions

[0006] The survey report shows that there are three layers of groundwater within the support depth of the foundation pit. The first layer is unconfined water, with a water level elevation of 25.27m~25.49m (burial depth 4.96m~5.18m). The second layer is confined water, with a water head elevation of 11.47m (burial depth 18.98m). The third layer is confined water, with a water head elevation of 7.77m (burial depth 22.68m). The highest groundwater level at the proposed site in the past 3 to 5 years is close to the natural ground level, which involves issues such as structural buoyancy and sudden surge of confined water.

[0007] 3. Impact of existing building structures

[0008] The excavation pit is adjacent to existing buildings with independent and strip foundations. The existing building foundations intersect with the first layer of soil nailing, and the high-pressure jet grouting piles intersect with the second and third layers of soil nailing and the two anchor bolts. The nearest distance between the surrounding steel frame columns and the edge of the excavation pit is approximately 1.4 meters. This negatively impacts the design and construction of the excavation pit support system.

[0009] 4. Conventional construction machinery cannot operate.

[0010] Construction of ultra-deep foundation pits is constrained by factors such as the current site conditions and hydrogeological conditions, making it impossible for conventional construction equipment to operate. In addition to considering the operating height and radius of construction machinery, issues such as construction quality, safety, construction period and cost must also be taken into account.

[0011] 5. Excavation of ultra-deep foundation pits within confined spaces faces numerous limitations.

[0012] Construction is being carried out within an existing building, with a floor height of 5m and steel frame column spacing of 6m to 8.55m. This presents challenges for the entry and exit of machinery and materials, as well as limitations on the operating height and radius of mechanical equipment. Furthermore, the foundation pit is extremely deep, making excavation difficult.

[0013] 6. High environmental protection requirements regarding noise and dust control during construction.

[0014] The foundation pit is extremely deep, posing significant safety hazards during construction; the preparation and treatment of mud slurry during mud wall construction can easily pollute the surrounding environment, and the construction of interlocking piles can easily generate noise pollution. Utility Model Content

[0015] This application provides a waterproof structure for the construction of ultra-deep foundation pits in urban renewal industrial plants, which improves the waterproofing effect of interlocking piles.

[0016] This application provides a waterproof structure for the construction of ultra-deep foundation pits in urban renewal industrial plants, comprising: interlocking pile bodies, wherein...

[0017] The interlocking pile body is externally supported by steel pipe piles.

[0018] A pipe well is provided on the outside of the steel pipe pile support.

[0019] In the above technical solution, by setting up interlocking pile bodies, steel pipe piles are installed on the outside of the interlocking pile bodies; a pipe well is installed on the outside of the steel pipe pile support; the tight interlocking of the interlocking pile bodies achieves initial waterproofing; the reinforcement effect of the steel pipe pile support improves the waterproofing performance; the dewatering assistance of the pipe well lowers the water level in the foundation pit and reduces the risk of leakage; ultimately, the construction of multiple waterproof barriers is achieved, ensuring construction safety and foundation pit stability.

[0020] In one specific implementation scheme, a waterproof layer is provided on the inner wall of the interlocking pile body.

[0021] In one specific implementation, the waterproof layer is a reinforced concrete waterproof layer.

[0022] In one specific implementation scheme, the interlocking pile body comprises a reinforced concrete pile and a plain concrete pile, wherein...

[0023] The reinforced concrete piles and the plain concrete piles are spaced apart.

[0024] In one specific implementation scheme, a crown beam is provided at the upper end of the interlocking pile body.

[0025] In one specific implementation scheme, prestressed anchor rods are provided on the steel pipe pile support.

[0026] In one specific implementation scheme, soil nails are provided on the steel pipe pile support.

[0027] In one specific implementation scheme, the manholes are symmetrically arranged on both sides of the interlocking pile body.

[0028] In one specific implementation scheme, the interlocking width between the reinforced concrete pile and the plain concrete pile is greater than 180 mm.

[0029] In one specific implementation, the interlocking post body is a ring-shaped interlocking post body. Attached Figure Description

[0030] Figure 1 A schematic diagram of a waterproof structure for construction of ultra-deep foundation pits in urban renewal industrial plants, provided in an embodiment of this application.

[0031] Figure 2 for Figure 1 Top view.

[0032] Among them, 1-interlocking pile body, 2-steel pipe pile support, 3-pipe well, 4-waterproof layer, 5-reinforced concrete pile, 6-plain concrete pile, 7-crown beam, 8-prestressed anchor rod, 9-soil nail. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.

[0034] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0035] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0036] To facilitate understanding of the waterproof structure for ultra-deep foundation pit construction in urban renewal industrial plants provided in this application embodiment, its application scenario will be explained first. The waterproof structure for ultra-deep foundation pit construction in urban renewal industrial plants provided in this application embodiment is used to improve the waterproof effect of interlocking piles. The main problems in ultra-deep foundation pit construction within existing buildings are as follows: 1. Poor engineering geological conditions: The thickness of the artificial fill at the proposed site is generally around 4m, and the lithology is mainly silty clay fill, fine sand fill, and gravel fill. The composition of the artificial fill layer is disordered, and its engineering properties are poor, which adversely affects the design and construction of the foundation pit support. 2. Complex Groundwater Conditions: The survey report shows three layers of groundwater within the support depth of the foundation pit. The first layer is unconfined aquifer, with a water level elevation of 25.27m~25.49m (depth 4.96m~5.18m). The second layer is confined aquifer, with a head elevation of 11.47m (depth 18.98m). The third layer is also confined aquifer, with a head elevation of 7.77m (depth 22.68m). The highest groundwater level at the proposed site over the past 3-5 years has been close to the natural ground level, raising concerns about structural buoyancy and confined water inrush. 3. Impact of Existing Building Structures: The foundation pit is adjacent to existing buildings with independent and strip foundations. The existing building foundations intersect with the first layer of soil nailing, and the high-pressure jet grouting piles intersect with the second and third layers of soil nailing and the two anchor bolts. The nearest distance between the surrounding steel frame columns and the edge of the foundation pit is approximately 1.4m. This negatively impacts the design and construction of the foundation pit support. 4. Inability of conventional construction machinery to operate: Construction of ultra-deep foundation pits is constrained by site conditions and hydrogeological factors, making conventional construction equipment unusable. Consideration must be given to the operating height and radius of construction machinery, as well as construction quality, safety, schedule, and cost. 5. Numerous limitations in excavating ultra-deep foundation pits within confined spaces: Construction within existing buildings, with a floor height of 5m and steel frame column spacing of 6m~8.55m, presents difficulties in the entry and exit of machinery and materials. The operating height and radius of machinery are limited, and the ultra-deep pits make excavation difficult. 6. High environmental requirements regarding noise and dust during construction: Ultra-deep foundation pits pose significant safety hazards during construction. Mud wall construction involves mud preparation and treatment that can easily pollute the surrounding environment, and the construction of interlocking piles can generate noise pollution. Therefore, this application provides a waterproof structure for ultra-deep foundation pit construction within urban renewal industrial plants to improve the waterproofing effect of interlocking piles. The following detailed description, in conjunction with specific accompanying drawings, illustrates this approach.

[0037] refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of a waterproof structure for construction of ultra-deep foundation pits in urban renewal industrial plants, provided in an embodiment of this application. Figure 2 for Figure 1 Top view.

[0038] exist Figure 1 and Figure 2This application provides a waterproof structure for the construction of ultra-deep foundation pits in urban renewal industrial plants, comprising: interlocking pile body 1, wherein,

[0039] The interlocking pile body is externally supported by steel pipe piles 2;

[0040] A pipe well 3 is provided on the outside of the steel pipe pile support.

[0041] In the above technical solution, by setting up interlocking pile bodies, steel pipe piles are installed on the outside of the interlocking pile bodies; a pipe well is installed on the outside of the steel pipe pile support; the tight interlocking of the interlocking pile bodies achieves initial waterproofing; the reinforcement effect of the steel pipe pile support improves the waterproofing performance; the dewatering assistance of the pipe well lowers the water level in the foundation pit and reduces the risk of leakage; ultimately, the construction of multiple waterproof barriers is achieved, ensuring construction safety and foundation pit stability.

[0042] Specifically, the waterproof structure for ultra-deep foundation pit construction within the urban renewal industrial plant combines multiple elements such as interlocking piles, steel pipe pile support, and manholes, and its beneficial effects include:

[0043] I. Waterproofing function of the interlocking pile body

[0044] The interlocking pile body serves as the primary waterproofing structure. Through the interlocking of adjacent piles (i.e., partial interlocking between adjacent concrete pile rows, with the reinforcing cage placed within the piles constructed subsequently), a continuous waterproof and retaining structure is formed. This arrangement (such as a combination of solid and concrete piles, or a combination of solid and concrete piles) ensures a tight bond between the piles, effectively preventing groundwater seepage.

[0045] II. Waterproofing Enhancement of Steel Pipe Pile Support

[0046] The steel pipe pile support installed on the outside of the interlocking pile body further enhances the waterproofing effect. The steel pipe pile support can not only withstand soil and water pressure, preventing the foundation pit from collapsing, but also form a robust waterproof barrier with the interlocking pile body. Through the support of the steel pipe piles, the deformation and displacement of the soil around the foundation pit are reduced, thereby lowering the risk of waterproofing structure failure due to soil deformation.

[0047] III. Dewatering Assistance for Wells

[0048] The manholes installed on the outside of the steel pipe pile support play a crucial role in dewatering. Manhole dewatering is typically suitable for gravel layers with high permeability and strata rich in groundwater, lowering the water level within the foundation pit by extracting groundwater. This not only reduces the pressure of groundwater on the waterproofing structure but also prevents leakage problems caused by excessively high water levels. Simultaneously, manhole dewatering helps maintain a dry environment within the foundation pit, providing favorable conditions for construction.

[0049] IV. Overall Waterproofing Effect

[0050] In summary, this interlocking pile waterproofing structure achieves the construction of multiple waterproof barriers through the organic combination of the interlocking pile body, steel pipe pile support, and well. This structure not only effectively prevents groundwater infiltration but also improves the stability and safety of the foundation pit. When constructing ultra-deep foundation pits within existing buildings, this waterproofing structure ensures the smooth progress of the construction process and protects the safety of surrounding buildings and underground pipelines.

[0051] In one specific implementation scheme, a waterproof layer 4 is provided on the inner sidewall of the interlocking pile body.

[0052] Specifically, interlocking piles are constructed by partially interlocking circumferential sections of adjacent concrete piles, with reinforcing cages inserted into subsequently constructed piles to form a continuous, waterproof, and retaining structure with excellent seepage prevention capabilities. The beneficial effects of having a waterproof layer on the inner wall of the interlocking pile body include:

[0053] Enhanced Waterproofing: One of the main functions of interlocking piles is to provide an effective waterproof barrier. Installing a waterproof layer on the inner wall of the interlocking pile body further enhances its waterproofing performance, ensuring that water cannot penetrate into the foundation pit when the groundwater level is high or the water quality is corrosive to the building structure, thus protecting the construction environment within the pit and the stability of the building.

[0054] Improving structural durability: Moisture is one of the main factors contributing to the corrosion and damage of building structures. By installing a waterproof layer, the erosion of the interlocking piles by moisture can be reduced, extending their service life and improving the overall durability of the support structure.

[0055] Reduced maintenance costs: The waterproof layer effectively prevents water penetration, thereby reducing repair and replacement costs caused by water erosion. This is of great significance for maintaining the long-term stability and safety of the foundation pit support structure.

[0056] Enhancing Support Effect: As part of the foundation pit support structure, the interlocking piles directly affect the safety and stability of the foundation pit. By installing a waterproof layer, the support effect of the interlocking piles can be further enhanced, ensuring that the foundation pit will not collapse or deform during excavation.

[0057] In summary, the application of a waterproof layer on the inner wall of the interlocking pile has multiple beneficial effects, including enhanced waterproofing performance, improved structural durability, reduced maintenance costs, and enhanced support effectiveness. These effects work together to provide strong protection for the safety and stability of the foundation pit support structure.

[0058] In one specific implementation, the waterproof layer is a reinforced concrete waterproof layer.

[0059] Specifically, when the waterproof layer is a reinforced concrete waterproof layer, its beneficial effects mainly include:

[0060] High strength and durability: The reinforced concrete waterproof layer is made of high-strength waterproof materials with high compressive, flexural, and tensile strength, effectively bearing the weight of the building and potential external pressures. It also possesses excellent weather resistance and corrosion resistance, resisting adverse effects such as acid and alkali corrosion and aging, thus ensuring the long-term stability and service life of the waterproof layer.

[0061] Excellent waterproofing performance: Reinforced concrete waterproofing layers have high sealing properties, effectively preventing moisture from penetrating into the building's interior and protecting the stability and integrity of the building structure. In areas with high groundwater levels or abundant rainfall, reinforced concrete waterproofing layers play a crucial role in waterproofing, reducing water erosion of the foundation pit and building.

[0062] Construction simplicity and flexibility: The construction of reinforced concrete waterproofing layers is relatively simple and can be reinforced as needed to adapt to different project requirements. It is not limited by season, has a fast construction speed, and can complete the laying of the waterproofing layer in a short time, thereby shortening the construction period and reducing construction costs.

[0063] Low maintenance cost: Compared with other waterproofing materials, reinforced concrete waterproofing layers have lower maintenance costs. They require less frequent maintenance, effectively reducing upkeep expenses and ensuring the long-term stable operation of buildings or foundation pits.

[0064] Excellent integrity: The reinforced concrete waterproof layer is tightly bonded to the interlocking pile body, forming a continuous waterproof and retaining structure. This integrity helps improve the stability and safety of the support structure and reduces the risk of damage to the support structure due to water erosion.

[0065] In summary, the application of reinforced concrete waterproofing layers on the inner walls of interlocking piles has significant beneficial effects, including high strength and durability, excellent waterproofing performance, simple and flexible construction, low maintenance costs, and good overall integrity. These effects work together to provide strong protection for the safety and stability of the foundation pit support structure.

[0066] In one specific implementation scheme, the interlocking pile body includes a reinforced concrete pile 5 and a plain concrete pile 6, wherein...

[0067] The reinforced concrete piles and the plain concrete piles are spaced apart.

[0068] Specifically, in the interlocking pile structure used for ultra-deep foundation pit construction, the interlocking pile body includes reinforced concrete piles and plain concrete piles, and these two types of piles are arranged alternately; the beneficial effects include:

[0069] I. Enhance overall structural performance

[0070] Improved shear strength: The alternating arrangement of reinforced concrete piles and plain concrete piles allows them to interlock, forming a continuous and compact wall. This wall structure can more effectively resist shear deformation when subjected to horizontal loads (such as earth pressure, water pressure, etc.), thereby improving the shear strength of the entire structure.

[0071] Enhanced water-stopping effect: Due to the tight interlocking of the reinforced concrete piles and the plain concrete piles, there are no construction cold joints or mud inclusions between them. This makes the interlocking pile structure perform excellently in water-stopping, effectively preventing groundwater leakage and ensuring the stability of the groundwater level during deep foundation pit construction.

[0072] II. Optimize material usage and cost

[0073] Reduced reinforcement ratio: Compared with traditional bored pile support, interlocking piles have a lower reinforcement ratio. This is because the alternation of reinforced concrete piles and plain concrete piles allows the entire structure to distribute the load more evenly when under stress, thereby reducing the amount of steel reinforcement used.

[0074] Material cost savings: Plain concrete piles generally use ultra-slow-setting concrete, which has good fluidity and plasticity before initial setting. Therefore, when pouring plain concrete piles, its fluidity can be fully utilized for natural compaction, reducing construction steps such as vibration and thus saving material costs.

[0075] III. Improve construction efficiency and quality

[0076] Simplified construction process: The construction process for interlocking piles is relatively simple and efficient. First, plain concrete piles are poured, and then reinforced concrete piles are poured before the plain concrete has initially set, achieving interlocking between the piles. This construction method avoids complex steps and cumbersome processes, improving construction efficiency.

[0077] Ensuring construction quality: During the construction of interlocking piles, the use of full-casing drilling technology allows for successful passage through saturated water-bearing strata and soft soil layers. Simultaneously, strict control of parameters such as concrete slump and pouring speed prevents concrete segregation and stratification, thus ensuring construction quality.

[0078] IV. Adaptability to Complex Geological Conditions

[0079] Improved geological adaptability: Interlocking pile structures can adapt to various complex geological conditions. Whether it is sandy soil, clay, silt, or muddy soil, interlocking piles can provide reliable support. This is due to the alternating placement of reinforced concrete piles and plain concrete piles and their tight interlocking.

[0080] Enhanced buoyancy resistance: In areas with high groundwater levels, interlocking pile structures effectively prevent the sidewalls and bottom of the pit from floating up. This is because the tight interlocking of reinforced concrete piles and plain concrete piles forms a continuous wall structure, thereby enhancing the overall structure's buoyancy resistance.

[0081] In summary, the alternating arrangement of reinforced concrete piles and plain concrete piles in the interlocking pile body improves overall performance, optimizes material usage and cost, enhances construction efficiency and quality, and strengthens the ability to adapt to complex geological conditions.

[0082] In one specific implementation scheme, a crown beam 7 is provided at the upper end of the interlocking pile body.

[0083] Specifically, setting a crown beam at the upper end of the interlocking pile body has the following beneficial effects:

[0084] I. Enhance overall stability

[0085] The capping beam connects the interlocking piles into a unified whole, forming a continuous and stable support system. This enhanced integrity helps improve the load-bearing capacity of the support system, enabling it to better resist external loads and earth pressures, thereby ensuring the stability of the foundation pit.

[0086] II. Improve the stiffness of the support system

[0087] As a horizontal beam, the capping beam has high rigidity and can effectively transfer and distribute loads. When the edge of the foundation pit is subjected to earth pressure or lateral displacement, the capping beam can evenly distribute the load to each interlocking pile, preventing excessive stress on a single pile and thus avoiding failure. This uniform load distribution improves the overall rigidity of the support system, making it more stable and reliable.

[0088] III. Optimize the force transmission path

[0089] The capping beam connects to the top of the interlocking piles, forming a clear force transmission path. When subjected to external loads, the load can be smoothly transferred to all parts of the support system along this path, thereby avoiding stress concentration and localized failure. This optimized force transmission path helps improve the overall performance and safety of the support system.

[0090] IV. Facilitates construction and maintenance

[0091] The construction of the capping beam is relatively simple and can be carried out simultaneously with the construction of the interlocking piles, thus shortening the construction period. At the same time, the capping beam also facilitates subsequent maintenance and inspection. Construction personnel can easily access the excavation pit through the capping beam to conduct inspection and maintenance work, ensuring the long-term stability and safety of the support system.

[0092] V. Enhance disaster resilience

[0093] In the event of natural disasters such as earthquakes and floods, capping beams enhance the overall disaster resistance of the support system. By dispersing and transferring stress, capping beams help reduce the risk of structural failure and protect the safety of people and property.

[0094] In summary, the addition of a capping beam at the upper end of the interlocking pile enhances overall stability, increases the rigidity of the support system, optimizes the force transmission path, facilitates construction and maintenance, and strengthens disaster resistance. These effects work together to ensure the stability and safety of the foundation pit, providing a reliable guarantee for deep foundation pit construction.

[0095] In one specific implementation scheme, prestressed anchor rods 8 are provided on the steel pipe pile support.

[0096] Specifically, the beneficial effects of installing prestressed anchor bolts on steel pipe pile supports include:

[0097] I. Improve the stability of the support structure

[0098] Prestressed anchors, by applying a pre-set tension force, can significantly enhance the strength and stability of the support structure. This enhancement allows the support structure to better resist external loads and earth pressure, thereby ensuring the stability of the foundation pit. Simultaneously, the installation of prestressed anchors can also reduce the deformation and displacement of the support structure, further improving its overall stability.

[0099] II. Optimize the stress state of the support structure

[0100] The application of prestressed anchors makes the support structure more rationally designed under stress. By adjusting the tension of the prestressed anchors, the support structure can withstand not only the weight of the load itself but also the additional compressive and tensile forces generated by the load. This optimization of the stress state helps improve the load-bearing capacity and seismic performance of the support structure.

[0101] III. Enhancing the adaptability of the support structure

[0102] The use of prestressed anchors allows the support structure to better adapt to complex geological conditions and construction environments. In deep foundation pit construction, geological conditions are often complex and variable, which traditional support structures may struggle to handle. The flexibility and adjustability of prestressed anchors allow the support structure to be adjusted and optimized according to specific circumstances, thereby better meeting construction needs.

[0103] IV. Improve construction efficiency and quality

[0104] The construction of prestressed anchors is relatively simple and efficient. By pre-setting and applying tension, the construction cycle can be greatly shortened and construction efficiency improved. At the same time, the construction process of prestressed anchors is relatively easy to control, ensuring the stability and reliability of construction quality.

[0105] V. Reduce project construction and maintenance costs

[0106] The use of prestressed anchors can reduce the amount of other materials required for the support structure, such as steel bars and concrete, thereby reducing project costs. Furthermore, due to the good durability and long service life of prestressed anchors, maintenance costs for the support structure can also be reduced.

[0107] VI. Enhance security

[0108] The application of prestressed anchors can effectively control the deformation and displacement of the support structure, thereby improving the safety of the foundation pit support. In deep foundation pit construction, the safety of the support structure is paramount. The installation of prestressed anchors ensures that the support structure remains stable under external loads, preventing collapses and other safety accidents.

[0109] In one specific implementation scheme, soil nails 9 are provided on the steel pipe pile support.

[0110] Specifically, the beneficial effects of installing soil nails on steel pipe pile supports include:

[0111] I. Enhance the overall stability of the support structure

[0112] Improve slope strength:

[0113] Steel pipe piles possess high bending stiffness, while soil nails offer excellent tensile and shear strength. The combination of these two materials allows the retaining structure to more effectively resist external loads and earth pressures, thereby improving the overall strength of the slope.

[0114] Controlling slope deformation:

[0115] Soil nails effectively control slope deformation by anchoring the slope deep into the soil. When a slope is subjected to external loads, soil nails can share part of the load and transfer it to more stable soil, thereby reducing slope displacement and deformation.

[0116] II. Optimize the stress state of the support structure

[0117] Load sharing:

[0118] Steel pipe piles and soil nails share the external load and the self-weight pressure of the soil. Due to the bending stiffness of the steel pipe piles and the tensile and shear strength of the soil nails, they can form an effective load-sharing mechanism, improving the bearing capacity of the support structure.

[0119] Improve stress transfer efficiency:

[0120] Soil nail anchors, deeply embedded in stable soil beyond the slip surface, provide significant tensile strength. The connection between the steel pipe piles and the soil nails allows for better stress transfer and diffusion within the support structure, reducing stress concentration.

[0121] III. Improve construction efficiency and quality

[0122] Simplify the construction process:

[0123] The combined support method of steel pipe piles and soil nailing is relatively simple and easy to construct. Steel pipe piles can serve as a guide and support structure for soil nailing, making soil nailing construction more convenient and faster.

[0124] Ensure construction quality:

[0125] The construction process of steel pipe piles and soil nails is relatively easy to control, ensuring the stability and reliability of construction quality. At the same time, the tight connection between the two also improves the integrity and durability of the support structure.

[0126] IV. Reduce project costs and maintenance costs

[0127] Save on material costs:

[0128] Compared to traditional support methods, the combination of steel pipe piles and soil nailing can reduce the amount of material used. Due to the synergistic effect between the two, the support structure requires less material to achieve the same load-bearing capacity.

[0129] Reduce maintenance costs:

[0130] Steel pipe piles and soil nails have good durability and a long service life. Therefore, the maintenance cost of the support structure is relatively low, which can reduce the overall cost of the project.

[0131] V. Enhance safety and environmental friendliness

[0132] Improve security:

[0133] The combined support method of steel pipe piles and soil nails can effectively control slope deformation and displacement, improving the safety of foundation pit support. In deep foundation pit construction, this combined support method can ensure the safety of construction personnel and the smooth progress of the project.

[0134] Good environmental performance:

[0135] The construction process of steel pipe piles and soil nails is relatively simple and does not generate a large amount of waste and pollutants. At the same time, the stability and durability of the support structure can also reduce the damage and impact on the surrounding environment.

[0136] In one specific implementation scheme, the manholes are symmetrically arranged on both sides of the interlocking pile body.

[0137] Specifically, when the manholes are symmetrically arranged on both sides of the interlocking pile body, the beneficial effects mainly include:

[0138] Improved drainage efficiency: Symmetrically arranged manholes can more effectively collect and treat groundwater, especially in areas with high water tables or during the rainy season. They can quickly remove accumulated water from the foundation pit, keeping it dry and stable. This layout helps ensure smooth water flow and reduces the possibility of water obstruction or accumulation, thereby improving drainage efficiency.

[0139] Enhancing the stability of the support structure: The installation of manholes helps balance the earth pressure on both sides of the interlocking piles, reducing the risk of deformation or damage to the support structure caused by unbalanced earth pressure. A symmetrical layout can further enhance the overall stability of the support structure, ensuring the safety of the foundation pit during excavation.

[0140] Optimized construction process: Symmetrically arranged manholes facilitate management and maintenance during construction, such as regular inspections, cleaning, and repairs. This layout also helps reduce interference and conflicts during construction, improving construction efficiency and quality.

[0141] Reducing the impact on the surrounding environment: By rationally setting the location and number of manholes, the impact on the surrounding groundwater level and soil environment can be reduced, mitigating the risk of ground subsidence and collapse caused by improper drainage. A symmetrical layout also helps maintain the ecological balance and stability around the foundation pit, minimizing damage to the surrounding environment.

[0142] Improving economic efficiency: A well-planned layout and selection of the number of drainage manholes can reduce the construction and operation costs of drainage systems, thereby improving economic efficiency. Optimizing the drainage system can also reduce economic losses such as work stoppages or delays caused by water accumulation in the foundation pit.

[0143] In one specific implementation scheme, the interlocking width between the reinforced concrete pile and the plain concrete pile is greater than 180 mm.

[0144] Specifically, when the interlocking width between reinforced concrete piles and plain concrete piles is greater than 180mm, compared to a typical interlocking width (such as 100mm), its beneficial effects include:

[0145] Enhanced overall stability: A wider interlocking surface can more effectively transfer and distribute loads, enhancing the overall stability of the interlocking pile wall. During stress, the wider interlocking surface can better resist deformation and maintain the stability of the support structure.

[0146] Improved seepage prevention performance: Wide interlocking surfaces help form a tighter interlocking connection, reducing the possibility of water seepage. In projects with high groundwater levels or requiring strict seepage prevention, wide interlocking surfaces can provide better seepage prevention and ensure that the inside of the foundation pit remains dry.

[0147] Enhanced shear resistance: A wider interlocking surface increases the shear resistance between reinforced concrete piles and plain concrete piles. Under shear loads, the wider interlocking surface better resists shear deformation, preventing damage to the support structure.

[0148] Improving construction tolerance: During construction, the accuracy of interlocking piles may be affected by various factors such as construction errors and changes in geological conditions. A wider interlocking surface can accommodate a certain amount of construction error, improving the construction tolerance and ensuring the quality and safety of the support structure.

[0149] Adaptable to complex geological conditions: Under complex geological conditions, such as soft soil layers and uneven strata, the wide interlocking surface can better adapt to changes in geological conditions and maintain the stability and safety of the support structure.

[0150] It is important to note that while a wider occlusal surface offers the aforementioned benefits, an excessively wide occlusal surface may also increase the workload and cost of the project. Therefore, in practical engineering projects, it is necessary to comprehensively consider factors such as specific project conditions, construction requirements, and economic efficiency to determine the appropriate occlusal width.

[0151] In addition, during the design and construction of interlocking piles, it is also necessary to pay attention to controlling the quality of concrete pouring, promptly addressing problems during construction, and strengthening construction safety management to ensure the quality and safety of the interlocking piles.

[0152] In one specific implementation, the interlocking post body is a ring-shaped interlocking post body.

[0153] Specifically, when the engagement post body is a ring-shaped engagement post body, its beneficial effects include:

[0154] I. Enhanced structural stability

[0155] Improve overall load-bearing capacity:

[0156] The ring-shaped interlocking pile body, through its ring structure design, can more effectively distribute and transfer loads, thereby improving the overall bearing capacity. This design makes the support structure more stable under stress and better able to resist the effects of external loads.

[0157] Enhanced resistance to deformation:

[0158] The ring structure increases the stiffness of the interlocking piles and reduces their deformation during stress. This helps maintain the stability of the foundation pit support structure and prevents safety hazards caused by deformation.

[0159] II. Improved Waterproofing Performance

[0160] Forming a continuous waterproof barrier: The interlocking structure of the ring-shaped piles forms a continuous waterproof barrier through the interlocking connection between adjacent piles. This design helps prevent groundwater from seeping into the foundation pit, protecting the construction environment and the stability of the structure within the pit.

[0161] Improved seepage prevention: The ring structure increases the contact area between the interlocking piles, thereby improving seepage prevention. In projects with high groundwater levels or requiring strict seepage prevention, the ring-shaped interlocking pile body can provide better waterproofing protection.

[0162] III. Improved construction efficiency

[0163] Simplified construction process: The design of the ring-shaped interlocking pile body simplifies the construction process, reducing complexity and uncertainty. This helps to shorten the construction period, reduce construction costs, and improve overall construction efficiency.

[0164] Facilitates mechanized construction: The ring structure design makes the construction of interlocking piles easier to perform mechanized operations. Using specialized construction machinery and equipment can further improve construction efficiency and quality.

[0165] IV. Adaptability to Complex Geological Conditions

[0166] Enhanced geological adaptability: The ring-shaped interlocking pile body can better adapt to complex geological conditions. Under complex geological conditions such as soft soil layers and uneven strata, the ring structure can provide better support effect, ensuring the stability and safety of the foundation pit support structure.

[0167] Improved construction safety: By enhancing geological adaptability, the ring-shaped interlocking pile body can reduce construction safety hazards caused by changes in geological conditions. This helps to protect the lives and health of construction workers.

[0168] In summary, the ring-shaped interlocking pile body exhibits significant beneficial effects in terms of structural stability, waterproofing performance, construction efficiency, and adaptability to complex geological conditions. These effects work together to support the foundation pit, providing strong protection for the safety and stability of the pit. In practical engineering, the decision to adopt the ring-shaped interlocking pile body should be made based on a comprehensive consideration of specific engineering conditions, construction requirements, and economic factors.

[0169] Those skilled in the art will know that this application can be implemented as a system, method, or computer program product.

[0170] Therefore, this disclosure can be implemented in the following forms: it can be entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, this application can also be implemented as a computer program product in one or more computer-readable media, the computer-readable media containing computer-readable program code.

[0171] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0172] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application. Based on this, various substitutions and improvements can be made to this application, all of which fall within the protection scope of this application.

Claims

1. A waterproof structure for the construction of an ultra-deep foundation pit in an urban renewal industrial plant, characterized by, include: The interlocking post body, among which, The interlocking pile body is externally supported by steel pipe piles. A pipe well is provided on the outside of the steel pipe pile support.

2. The waterproof structure for the construction of an ultra-deep foundation pit in an urban renewal industrial plant according to claim 1, characterized in that, A waterproof layer is provided on the inner wall of the interlocking pile body.

3. The waterproof structure for the construction of an ultra-deep foundation pit in an urban renewal industrial plant according to claim 2, characterized in that, The waterproof layer is a reinforced concrete waterproof layer.

4. The waterproof structure for ultra-deep foundation pit construction in urban renewal industrial plants according to claim 3, characterized in that, The interlocking pile body comprises a reinforced concrete pile and a plain concrete pile, wherein... The reinforced concrete piles and the plain concrete piles are spaced apart.

5. The waterproof structure for the construction of an ultra-deep foundation pit in an urban renewal industrial plant according to claim 4, characterized in that, A crown beam is provided at the upper end of the interlocking pile body.

6. The waterproof structure for the construction of an ultra-deep foundation pit in an urban renewal industrial plant according to claim 5, characterized in that, The steel pipe pile support is equipped with prestressed anchor rods.

7. The waterproof structure for the construction of an ultra-deep foundation pit in an urban renewal industrial plant according to claim 6, characterized in that, Soil nails are installed on the steel pipe pile support.

8. The waterproof structure for the construction of an ultra-deep foundation pit in an urban renewal industrial plant according to claim 7, characterized in that, The manholes are symmetrically arranged on both sides of the interlocking pile body.

9. The waterproof structure for the construction of an ultra-deep foundation pit in an urban renewal industrial plant according to claim 8, characterized in that, The interlocking width between the reinforced concrete pile and the plain concrete pile is greater than 180mm.

10. The waterproof structure for the construction of an ultra-deep foundation pit in an urban renewal industrial plant according to claim 9, characterized in that, The interlocking post body is a ring-shaped interlocking post body.

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