Elevator pit using precast modules

Abstract

The present invention relates to an elevator pit using a precast module, and more specifically, to providing an elevator pit using a precast module that can resolve curing delays, leveling errors, poor anchor placement, leakage problems, and safety accidents that frequently occur in conventional on-site casting methods, shorten the construction period, and simultaneously secure precise construction and structural stability. The invention comprises a ground pile embedded in the ground, a support frame coupled to the top of the ground pile, a panel section connected to the support frame to form a pit space and fixed to each other by a grid frame, a bottom plate and a horizontal adjustment and dust absorption structure disposed between them, a slope and drainage structure, a waterproof coating layer on the inner and outer surfaces, a filling space and filling material between the double-arranged panel sections, a lifting coupling means disposed at the upper corner of the support frame, and safety supports, safety hooks, safety markers, and safety detection sensors.

Description

Technology Field

[65535] The present invention relates to an elevator pit using a precast module, and more specifically, to providing an elevator pit using a precast module that can resolve curing delays, leveling errors, poor anchor placement, leakage problems, and safety accidents that frequently occur in conventional on-site casting methods, shorten the construction period, and simultaneously secure precise construction and structural stability. The invention comprises a ground pile installed on the ground, a support frame coupled to the top of the ground pile, a panel section connected to the support frame to form a pit space and fixed to each other by a grid frame, a bottom plate and a horizontal adjustment and dust absorption structure disposed between them, a slope and drainage structure, a waterproof coating layer on the inner and outer surfaces, a filling space and filling material between the double-arranged panel sections, a lifting coupling means disposed at the upper corner of the support frame, and safety supports, safety hooks, safety markers, and safety detection sensors. Background Technology Pits, which serve as foundation structures for elevator installation, have generally been constructed by installing formwork on-site, pouring concrete, and allowing it to cure. While this conventional technology is a long-standing traditional method, it entails various problems depending on site conditions and the working environment. First, the concrete curing process typically takes several days to several weeks, and the entire construction process is frequently delayed due to significant influences from weather and site conditions. Furthermore, concrete poured directly on-site often results in uneven foundation surface flatness due to ground heterogeneity, which can compromise structural stability from the initial installation stage. Additionally, horizontal leveling is essential for precisely positioning elevator module frames or guide rails after the pit is installed; however, conventional technology requires this process to be performed repeatedly, leading to significant variations in precision depending on the operator's skill level and the condition of the equipment. Such errors directly impact the installation accuracy of the elevator modules and can consequently result in reduced ride comfort, abnormal vibrations, and increased long-term maintenance costs. Furthermore, discrepancies between the design and actual installation locations are prone to occur during the on-site placement of anchor bolts. This inevitably necessitates post-installation correction work, resulting in additional costs and extended construction periods. Additionally, due to the characteristics of underground environments, there is a high likelihood of groundwater or rainwater inflowing into the pit. Conventional technologies often fail to provide sufficient drainage or waterproofing measures, leading to frequent water accumulation inside the pit. This accelerates cracking in concrete structures and corrosion of rebar, ultimately compromising structural safety in the long term. Moreover, since formwork installation, rebar placement, concrete pouring, and steel reinforcement are carried out simultaneously during on-site construction, the process becomes complex. Additionally, workers are required to work at heights for extended periods, increasing the risk of safety accidents.Furthermore, this method has limitations in that quality control is difficult due to factory production, resulting in quality variations across construction sites and making it difficult to guarantee consistent performance. In addition, site-centered construction methods generate significant amounts of noise and dust during the process, impacting the surrounding environment and becoming a source of complaints in areas with strict environmental regulations, such as urban centers. Moreover, repetitive wet processes are heavily dependent on weather conditions; construction is difficult to proceed during rain, snow, or severe cold, leading to prolonged overall project schedules. Additionally, the high reliance on on-site labor results in heavy labor costs, and a shortage of skilled personnel further degrades the quality and safety of the construction. Therefore, there is an urgent need for an elevator pit utilizing a new type of precast module that can simultaneously resolve the problems associated with conventional on-site casting technology—such as construction delays, lack of precision, inadequate waterproofing and drainage performance, safety accident risks, limitations in quality control, environmental impact, and labor costs—while ensuring shortened construction periods, precise construction, structural stability, and safety, and further achieving uniform quality through standardized module production. Prior art literature Patent Document (001) Republic of Korea Registered Patent No. 10-256818 (Registered on Aug. 14, 2023) The problem to be solved The technical problem that the present invention aims to solve is to provide an elevator pit using a precast module that can resolve construction delays and curing issues arising during the on-site concrete pouring process, in order to resolve the aforementioned problems or necessities. Another objective of the present invention is to provide an elevator pit using a precast module that resolves horizontal errors and reduced precision caused by ground heterogeneity or lack of worker skill. Yet another objective of the present invention is to provide an elevator pit using a precast module that can reduce repetitive leveling work during the installation process and simultaneously achieve precise horizontal adjustment and vibration absorption during the initial installation stage. Yet another objective of the present invention is to provide an elevator pit using a precast module that ensures the precision of the connection with the elevator module frame and requires no separate correction after installation. Yet another objective of the present invention is to provide an elevator pit using a precast module equipped with waterproofing and drainage performance to prevent leakage and damage to internal structures caused by the inflow of groundwater or rainwater. Yet another objective of the present invention is to provide an elevator pit using a precast module that includes a double panel structure and filler material to reinforce structural strength and durability. Yet another objective of the present invention is on-site The present invention aims to provide an elevator pit using a precast module equipped with a lifting coupling means capable of ensuring safety during the lifting and installation process while simultaneously performing structural reinforcement functions. Another objective of the present invention is to provide an elevator pit using a precast module that may include a safety support, a safety hook, a safety sign, and a safety detection sensor to ensure worker safety. Another objective of the present invention is to provide an elevator pit using a precast module equipped with sound insulation and water-blocking performance capable of reducing noise and vibration and maintaining stable quality over a long period.Meanwhile, the technical problems to be solved by the present invention are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below. means of solving the problem An elevator pit using a precast module according to an example of the present invention for realizing the above-described objective may first include a ground pile (100) embedded in the ground. Additionally, it may include a support frame (200) positioned to rest on the top of the ground pile (100), having a coupling structure (111) formed at the bottom that is coupled with the ground pile (100), a module frame coupling structure (112) formed at the top that engages with a coupling structure formed at the bottom of the elevator module frame, and a processing nut structure formed on its side. Furthermore, it may include a panel section (300) connected to the support frame (200) to form a side, forming an elevator pit space (210) inside, and configured to be connected and fixed to each other by a grid frame (310) coupled in a longitudinal or transverse direction. At this time, a bottom plate (410) positioned at the bottom of the pit space (210), and the inner side of the bottom plate (410) and the ground pile (100) It may include a horizontal adjustment and dust absorption structure (411) disposed between the base surfaces to perform horizontal adjustment and dust absorption functions. Additionally, it may include a slope (412) formed on the upper part of the bottom plate (410) and a drainage structure (413) disposed at the end of the slope (412). Furthermore, it may include a waterproof coating layer (320) coated on at least one of the inner or outer surfaces of the panel part (300), a filling space (330) formed between the panel part (300) arranged in a double layer, a filling material (331) filled in the filling space (330), and a lifting coupling means (230) formed at the upper four corner positions of the support frame (200) and used as a hook for structural reinforcement and on-site installation. Additionally, a safety support, a safety hook, a safety mark, which are optionally disposed in the inner direction of the panel part (300) or the support frame (200). The elevator pit section may be characterized by including at least one of the safety detection sensors (240), wherein the above components are pre-fabricated and then transported and installed at the site.Meanwhile, the horizontal adjustment vibration absorption structure (411) may be characterized by being configured to perform initial horizontal leveling when installed between the bottom plate (410) and the foundation surface of the ground pile (100), while simultaneously absorbing and mitigating vibration and shock loads generated during elevator operation, by combining a pad portion made of a high-elasticity body and a plurality of fine adjustment bolts fastened to the upper and lower parts of the pad portion. At this time, the module frame coupling structure (112) of the support frame (200) may be characterized by including a plurality of insertion grooves and a bolt fastening portion formed at the upper part of the support frame (200), and being configured to mesh with a coupling structure corresponding to the lower part of the elevator module frame, and being precision machined so that the meshing precision is within ±0.5 mm, so that it is configured to be accurately aligned with the elevator module frame without separate readjustment after installation. Also, at this time, a plurality of machined nut structures are arranged at regular intervals on the side of the support frame (200), and an anti-corrosion coating layer is formed on each machined nut structure, and on the opening that contacts the outside It may be characterized by being fitted with a watertight cap to prevent wear and corrosion of the screw threads even during long-term use, and to minimize damage caused by the inflow of rainwater or groundwater. Additionally, the filling space (330) of the panel part (300) may be filled with at least one of non-shrink mortar, foamed concrete, or high-strength lightweight concrete to reinforce structural strength and durability, thereby suppressing crack formation after construction and providing stable support performance even against drying shrinkage of the filling material or deformation caused by external forces. Meanwhile, the waterproof coating layer (320) coated on the inner and outer surfaces of the panel part (300) is formed from at least one of a polyurea-based, epoxy resin-based, or fluoropolymer resin coating material, wherein the coating layer is applied with a thickness of 0.5 mm or more to maintain watertight performance for at least 24 hours in a wet environment, and the adhesion of the coating layer is 2.It may be characterized by maintaining a pressure of 0 MPa or higher so that peeling or cracking does not occur even during long-term use. Additionally, the slope (412) formed on the upper surface of the bottom plate (410) and the drainage structure (413) positioned at the end of the slope (412) are formed at a constant angle of inclination of 2° to 5° to allow for rapid drainage when rainwater or groundwater flows in, and the drainage structure (413) is designed to facilitate maintenance by including a backflow prevention valve, an inspection port, and a drainage pump, and the drainage pump may be characterized by being linked to a control unit so that it operates automatically when the water level inside the pit rises by 100 mm or more. Additionally, the lifting coupling means (230) formed at the upper four corners of the support frame (200) may be characterized by having inserts made of high-strength alloy steel embedded in each of the four locations, and a screw-type lifting hook capable of supporting a load of 1.5 tons or more is fastened inside the insert, and the lifting hook is lifted during the on-site installation process It may be characterized by ensuring a lifting performance with a safety factor of 3.0 or higher upon settling, and being sealed with a cover plate or fixing cap after installation to prevent exposure to external corrosion factors. Meanwhile, a safety support, safety hook, safety mark, and safety detection sensor (240) that are selectively placed in the inner direction of the panel part (300) or support frame (200) are structures for ensuring the safety of workers inside the pit, wherein the safety support is fixed to the inner surface of the support frame (200) by welding or bolting and is formed in the shape of a step capable of supporting a load of at least 100 kg, and the safety hook is formed as a high-strength steel ring with a diameter of 20 mm or more and is arranged to allow a fall prevention safety belt or rope to be connected, and the safety hook is 1 along the pit depth direction.The safety signs are arranged in multiple layers at intervals of 5m, and are made of fluorescent paint or luminous film to ensure visibility even in environments with power outages or low light conditions. They are attached with warning text printed on them, such as the location of an emergency exit or safety hook. The safety detection sensors are configured to detect abnormal water levels, gas concentrations, and vibrations inside the pit. The water level sensor detects changes in water level in 10cm increments and outputs an alarm. The gas sensor measures CO, CH₄, and H₂S concentrations in real time and transmits an alarm signal to an external control panel if they exceed a standard value. The vibration sensor monitors the resonance frequency of the pit structure and is configured to provide an immediate notification when abnormal vibrations occur. Meanwhile, the slope (412) formed on the upper surface of the bottom plate (410) is formed with a width of 100mm or more and a depth of 50mm or more to improve water collection and drainage efficiency inside the pit. The end of the slope is directly connected to a drain, and the drain is equipped with a stainless steel mesh filter to prevent the inflow of foreign matter. A rubber packing or a silicone packing is inserted into the joint portion between the panel portion (300) and the support frame (200) to block fine gaps that may occur after assembly, thereby ensuring sound insulation and water insulation performance. The packing is configured to have a heat resistance of 100°C or higher and a pressure resistance of 0.5 MPa or higher so that performance does not deteriorate even under external impact or long-term use environments. Additionally, sound insulation panels are attached to the inner and outer sides of the panel portion (300) as needed to reduce noise generated during elevator operation by 40 dB or more, thereby minimizing noise transmission at the joint portion with the building structure. Effects of the invention By using an elevator pit utilizing a precast module according to one embodiment of the present invention, first, the overall construction period can be shortened by eliminating on-site casting and curing processes. Second, the installation precision of the elevator module frame can be improved through horizontal adjustment and a precision machining structure. Third, the initial construction leveling and vibration absorption during operation can be achieved simultaneously through a high-elasticity pad and a fine-tuning bolt structure. Fourth, leakage and internal corrosion problems can be prevented by providing a waterproof coating layer, slope, and drainage structure. Fifth, structural strength can be reinforced and durability improved through the composition of a double panel section and a filler material. Sixth, safety during on-site lifting and installation processes can be ensured through a lifting coupling means. Seventh, worker safety and safety during maintenance can be enhanced through a safety support, safety hook, and safety detection sensor. Eighth, noise and vibration can be reduced through a soundproof panel and a vibration-absorbing structure, thereby ensuring ride comfort and harmony with the building structure. Ninth, modules pre-fabricated in the factory By applying it to the field, it is possible to secure standardized quality and uniform performance. Meanwhile, the effects obtainable from the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present invention belongs from the description below. Brief explanation of the drawing The following drawings attached to this specification illustrate a preferred embodiment of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIGS. 1 and 2 are drawings showing the overall configuration of an elevator pit using a precast module according to a preferred embodiment of the present invention. FIGS. 3 and 4 are drawings showing the ground piles of an elevator pit using a precast module according to a preferred embodiment of the present invention. FIGS. 5 and 6 are drawings showing the support frames of an elevator pit using a precast module according to a preferred embodiment of the present invention. FIGS. 7 to 11 are drawings showing the bottom plates of an elevator pit using a precast module according to a preferred embodiment of the present invention. FIGS. 12 and 13 are drawings showing the panel sections of an elevator pit using a precast module according to a preferred embodiment of the present invention. Specific details for implementing the invention Specific structural or functional descriptions of embodiments according to the concept of the present invention disclosed herein are provided merely for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms and are not limited to the embodiments described herein. Since embodiments according to the concept of the present invention may be subject to various modifications and may take various forms, embodiments are illustrated in the drawings and described in detail in this specification. However, this is not intended to limit embodiments according to the concept of the present invention to specific disclosed forms, and includes all modifications, equivalents, or substitutions that fall within the spirit and technical scope of the present invention. FIGS. 1 and 2 are drawings showing the overall configuration of an elevator pit using a precast module according to a preferred embodiment of the present invention; FIGS. 3 and 4 are drawings showing the ground pile of an elevator pit using a precast module according to a preferred embodiment of the present invention; FIGS. 5 and 6 are drawings showing the support frame of an elevator pit using a precast module according to a preferred embodiment of the present invention; FIGS. 7 to 11 are drawings showing the bottom plate of an elevator pit using a precast module according to a preferred embodiment of the present invention; and FIGS. 12 and 13 are drawings showing the panel section of an elevator pit using a precast module according to a preferred embodiment of the present invention. The present invention relates to an elevator pit that simultaneously secures construction precision, durability, waterproofing performance, and safety by transporting a precast module, which is precisely manufactured in a factory, to the site and installing it in a short period of time, and the ground pile (100) embedded in the ground is a foundation A support frame (200) is placed on top of the support body and has a lower coupling structure (111), an upper module frame coupling structure (112), and a side processing nut structure.This is intended to clarify the load transfer path between the pile and the upper module of the pit and to reduce quality deviation by lowering reliance on on-site welding. The panel section (300) connected to the support frame (200) forms a pit space section (210) inside and is firmly connected to each other by a grid frame (310) to increase the rigidity against buckling and bending of the side walls. A bottom plate (410) is installed at the bottom of the pit space section (210), and a horizontal adjustment vibration absorption structure (411) is placed between it and the foundation surface to simultaneously achieve initial leveling and vibration damping during operation. A slope groove (412) is formed on the upper part of the bottom plate (410), and a drainage structure (413) is placed at the end to quickly discharge flooded and retained water. A waterproof coating layer (320) is applied to the inner and outer surfaces of the panel section (300) to form a permanent waterproof membrane, and the panels are double-arranged to create a filling space (330) between them, and a filling material (331) is inserted to improve sound insulation, rigidity, and impact resistance. Lifting coupling means (230) are provided at the four upper corners of the support frame (200) to ensure safety during lifting and on-site placement, and selected configurations among a safety support, safety hook, safety sign, and safety detection sensor (240) are placed inside to enhance safety for maintenance and emergency response. The horizontal adjustment vibration absorption structure (411) is designed with a combination of a high-elasticity pad and a fine-adjustment bolt. The high-elasticity absorbs minute vibrations and shocks as energy, and the fine-adjustment bolt enables precise leveling immediately after installation and during periodic inspection. The module frame coupling structure (112) of the support frame (200) consists of multiple insertion grooves and a bolt fastening part and is processed to maintain a meshing precision of within ±0.5 mm. This value is intended to satisfy the design tolerance that determines the straightness of the guide rail and the running quality of the elevator, thereby minimizing the need for a separate correction process after installation. An anti-corrosion coating and a watertight cap are applied to the processed nut structure on the side of the support frame to suppress thread corrosion and block moisture and ions from the silted soil. At least one of non-shrink mortar, foamed concrete, or high-strength lightweight concrete is used in the filling space (330) of the panel section.Non-shrink materials suppress shrinkage cracks after curing, and foamed or lightweight concrete reduces self-weight while absorbing shock and sound pressure, thereby reducing vibration transmission between the structure and the building body. The waterproof coating layer (320) is composed of at least one of polyurea-based, epoxy resin-based, and fluorine-based materials, and its thickness is set to 0.5 mm or more. This is the minimum film thickness required to ensure resistance to micro-crack bridging and water pressure, and is an empirical lower limit value for ensuring continuous watertightness for more than 24 hours in a wet environment. An adhesion strength of 2.0 MPa or more to the concrete substrate surface is a criterion for preventing delamination even under groundwater pressure and repeated loads of thermal expansion and contraction. The slope (412) of the bottom plate is formed at an angle of inclination of 2° to 5°. Since water retention occurs if the angle is less than 2° and work safety is reduced if the angle exceeds 5° due to the steep slope and the risk of micro-cracks in the settlement area, the range is reasonable. The drainage structure (413) includes a backflow prevention valve, an inspection port, and a drainage pump, and the pump is linked to a control system to operate automatically when the water level rises by 100 mm. 100 mm is the value adopted as the minimum effective head to prevent dry operation of the pump and avoid unnecessary frequent operation. The lifting coupling means (230) has a supporting capacity of at least 1.5 tons per insert, and the entire system satisfies a safety factor of 3.0 or higher. This complies with industrial safety standards that consider module mass, dynamic lifting coefficient, and asymmetric load distribution. After installation, the lifting point is sealed with a cap or cover to suppress corrosion and improve aesthetics and safety. The safety support is fixed to the inside of the support frame (200) by welding or bolting and is set to support a minimum load of 100 kg. This is a static load standard that considers the weight of an adult worker and a handheld tool. The safety ring uses a high-strength steel ring with a diameter of 20 mm or more to provide sufficient margin against repeated tensile and impact loads. The vertical arrangement of the rings is set at intervals of 1.5 m in the depth direction to ensure quick securing of fastening points when changing the work position and to avoid interference caused by excessive installation density.Safety signs use fluorescent or phosphorescent materials to ensure visibility even in power outages and low light conditions. The safety detection sensor detects the water level in 10 cm increments and issues an alarm, while the gas sensor monitors CO, CH₄, and H₂S in real time and notifies the control panel if they exceed the threshold. The vibration sensor monitors signs of resonance near the structure's natural frequency to detect bearing damage or rail misalignment early. The slope (412) is formed with a width of 100 mm or more and a depth of 50 mm or more. The width provides a cleaning margin for soil and fine sediment to pass through, while the depth ensures temporary storage of incoming water and pump suction stability. A stainless steel mesh filter is applied to the end drain to block the inflow of large particles and ensure corrosion-resistant maintainability. A rubber-based or silicone-based packing is inserted at the joint between the panel section (300) and the support frame (200), requiring a heat resistance of 100°C or more and a pressure resistance of 0.5 MPa or more. This is to ensure continuous performance against surface temperature rise caused by solar radiation in the summer, as well as drainage back pressure and washing pressure. Soundproof panels attached when necessary are designed to reduce operating noise by more than 40 dB, thereby suppressing the transmission of noise to the building structure and indoor environment. A reduction of 40 dB is an effective standard to lower the perceived level of mechanical noise from a general elevator to an acceptable indoor living range. The ground pile (100) is a cast-in-place pile or a precast pile, and the concrete strength and rebar arrangement are determined according to the design bearing capacity, and steel pipe piles may be used if necessary. The support frame (200) and the grid frame (310) use structural steel with excellent weldability, corrosion resistance, and yield strength, and corrosion resistance is increased through galvanizing, metal spraying, or epoxy primer coating. The panel section (300) is basically precast concrete, and if lightweighting is required, fiber-reinforced cement composites such as GRC or HPFRCC may be applied. The filler (331) is based on non-shrink mortar, but foamed concrete or high-strength lightweight concrete is selected to ensure fire resistance, lightness, and sound insulation performance.For the waterproof coating layer (320), the rapid curing and crack-following properties of polyurea, the adhesion and chemical resistance of epoxy, and the weather resistance of fluorine-based materials are combined and applied according to the construction method and climate conditions. The high-elasticity pad uses neoprene, EPDM, or NBR-based composite materials to satisfy oil and water resistance, heat resistance, and dynamic fatigue properties. The packing is selected according to requirements, using silicone-based heat and weather resistance or fluororubber-based chemical resistance. The lifting insert and ring are made of alloy steel forgings and maintain performance even in saltwater environments through zinc-nickel plating or inorganic zinc-rich coating. Here, panels, support frames, and grid frames manufactured by CNC formwork are assembled under factory dimensional tolerance control, and the waterproof coating layer is applied after pretreatment of the substrate. The filling space is partially or entirely pre-filled or switched to on-site filling according to site conditions. At the site, after pile construction, the module is lowered and placed using a lifting device following level inspection, and the level is adjusted using a horizontal adjustment and vibration-absorbing structure (411). The slope and drainage lines are connected, and after inspecting the pump, sensors, and safety equipment, the final grouting and sealing are completed. Meanwhile, by integrating an automatic leveling actuator into the horizontal adjustment vibration absorption structure (411), installation time can be further shortened through closed-loop control linked with a laser level. A sleeve insert and a drain channel are integrated into the processed nut structure on the side of the support frame (200) to discharge moisture around the connection point and prevent condensation. A smart float switch and an IoT flow meter are added to the drainage structure (413) to record flooding patterns over the long term and predict maintenance timing. A micro-pore layer for vibration isolation or a metamaterial-based soundproofing material is inserted between the panel section (300) and the filler (331) to further reduce low-frequency resonance. To respond to earthquakes, a small seismic isolation pad or a sliding bearing is partially applied under the bottom plate (410) to reduce the transmission of horizontal seismic force and improve rail alignment preservation. On the outer surface of the waterproof coating layer (320), a sacrificial anode for electrical protection or an Impress Casodic protection can be applied to suppress rebar corrosion during long-term use.To facilitate BIM integration, RFID tags are embedded in all inserts and piping points to enable the implementation of a digital twin for construction inspection and maintenance. Internal safety detection sensors are connected to an edge AI board to learn abnormal vibration patterns in real time and utilize them for long-term predictive maintenance. The lifting coupling means (230) is designed to be covered with a detachable safety guard during normal operation to prevent current leakage or hand pinching, and to allow for immediate switching to a lifting point in emergencies. By standardizing the coupling interface specifications, interoperability with various elevator module frames is ensured, and flexible adaptation to irregular dimensions at the site is achieved through module spacing adjustment spacers. The present invention has been described above through a preferred embodiment; however, the above-described embodiment is merely an illustrative explanation of the technical concept of the present invention, and it will be understood by those skilled in the art that various changes are possible within the scope of the technical concept of the present invention. Therefore, the scope of protection of the present invention should be interpreted not by specific embodiments but by matters described in the patent claims, and all technical concepts within the corresponding scope should be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols 100 … Ground pile 111 … Connection structure 112 … Module frame connection structure 200 … Support frame 210 … Elevator pit space 230 … Lifting connection means 240 … Safety support, safety hook, safety sign, safety detection sensor 300 … Panel section 310 … Grid frame 320 … Waterproof coating layer 330 … Filling space 331 … Filling material 400 … Bottom plate 410 … Bottom plate 411 … Leveling and dust absorption structure 412 … Slope 413 … Drainage structure

Claims

Claim 1 A ground pile (100) installed on the ground; a support frame (200) positioned to be placed on top of the ground pile (100), having a coupling structure (111) formed at the bottom that is coupled with the ground pile (100), a module frame coupling structure (112) formed at the top that engages with a coupling structure formed at the bottom of an elevator module frame, and a processing nut structure formed on its side; a panel section (300) connected to the support frame (200) to form a side, forming an elevator pit space (210) inside, and configured to be connected and fixed to each other by a grid frame (310) coupled in a longitudinal or transverse direction; a bottom plate (410) positioned at the bottom of the pit space (210), a horizontal adjustment and vibration absorption structure (411) positioned between the bottom plate (410) and the inner foundation surface of the ground pile (100) to perform horizontal adjustment and vibration absorption functions; a slope (412) formed on the upper part of the bottom plate (410), and A drainage structure (413) disposed at the end of the slope (412); a waterproof coating layer (320) coated on at least one of the inner or outer surfaces of the panel section (300); a filling space (330) formed between the panel sections (300) arranged in double layers, and a filling material (331) filled in the filling space (330); An elevator pit using a precast module, comprising: a lifting coupling means (230) formed at the upper four corner positions of the support frame (200) and used as a hook for structural reinforcement and on-site installation; wherein at least one of a safety support, a safety hook, a safety mark, and a safety detection sensor (240) is selectively arranged in the inner direction of the panel part (300) or the support frame (200); and wherein each component installed on the support frame (200), the panel part (300), the support frame (200), and the panel part (300) is pre-fabricated and then transported and installed on-site. Claim 2 In claim 1, the horizontal adjustment vibration absorption structure (411) is configured to perform initial horizontal leveling when installed between the bottom plate (410) and the foundation surface of the ground pile (100), and simultaneously absorb and mitigate vibration and shock loads generated during elevator operation, by combining a pad portion made of a high-elasticity body and a plurality of fine adjustment bolts fastened to the upper and lower parts of the pad portion. The module frame coupling structure (112) of the support frame (200) is configured to include a plurality of insertion grooves and a bolt fastening portion formed at the upper part of the support frame (200) to engage with a coupling structure corresponding to the lower part of the elevator module frame, and is precision machined so that the engagement precision is within ±0.5 mm, thereby being configured to be accurately aligned with the elevator module frame without separate readjustment after installation. A plurality of machined nut structures are arranged at regular intervals on the side of the support frame (200), each machined nut structure has an anti-corrosion coating layer formed thereon, and a watertight cap is fastened to the opening in contact with the outside, so that even during long-term use An elevator pit using a precast module, characterized in that it is configured to prevent wear and corrosion of the screw threads and to minimize damage caused by the inflow of rainwater or groundwater, and the filling space (330) of the panel section (300) is filled with at least one of non-shrink mortar, foamed concrete, or high-strength lightweight concrete to reinforce structural strength and durability, thereby suppressing crack formation after construction and providing stable support performance even against drying shrinkage of the filling material or deformation caused by external forces. Claim 3 In claim 2, the waterproof coating layer (320) coated on the inner and outer surfaces of the panel portion (300) is formed from at least one of a polyurea-based, epoxy resin-based, or fluorine-based resin coating material, and the coating layer is applied with a thickness of 0.5 mm or more to maintain watertight performance for at least 24 hours in a wet environment, and the adhesion strength of the coating layer is maintained at 2.0 MPa or more against the concrete substrate surface so as not to cause peeling or cracking even during long-term use, and the slope (412) formed on the upper surface of the bottom plate (410) and the drainage structure (413) disposed at the end of the slope (412) are formed at a constant angle of inclination of 2° to 5° to allow for rapid drainage when rainwater or groundwater flows in, and the drainage structure (413) is designed to facilitate maintenance by including a backflow prevention valve, an inspection port, and a drainage pump, and the drainage pump is linked with a control unit to operate automatically when the water level inside the pit rises by 100 mm or more, and the An elevator pit using a precast module, characterized in that the lifting coupling means (230) formed at the upper four corner positions of the support frame (200) is equipped with an insert made of high-strength alloy steel embedded in each of the four locations, and a screw-type lifting hook capable of supporting a load of 1.5 tons or more is fastened inside the insert, and the lifting hook is equipped to ensure a lifting performance of a safety factor of 3.0 or more during lifting and settling during the on-site installation process, and after installation, is sealed with a cover plate or a fixing cap to prevent exposure to external corrosion factors. Claim 4 In claim 3, the safety support, safety hook, safety marker, and safety detection sensor (240), which are optionally placed in the inner direction of the panel section (300) or the support frame (200), are configured to ensure the safety of workers inside the pit. The safety support is fixed to the inner surface of the support frame (200) by welding or bolting and is formed in the shape of a step capable of supporting a load of at least 100 kg. The safety hook is formed as a high-strength steel ring with a diameter of at least 20 mm and is arranged to allow the connection of a fall prevention safety belt or rope. The safety hook is arranged in multiple stages at intervals of 1.5 m along the pit depth direction. The safety marker is made of fluorescent paint or luminous film to ensure visibility even in environments with power outages or low light conditions, and is attached with warning text printed on it, such as the location of an emergency exit or safety hook. The safety detection sensor is configured to detect abnormal water levels, gas concentrations, and vibrations inside the pit. The water level sensor detects changes in water level in units of 10 cm and outputs an alarm. An elevator pit using a precast module, characterized in that a gas sensor measures the concentrations of CO, CH₄, and H₂S in real time and transmits an alarm signal to an external control panel when they exceed a reference value, and a vibration sensor monitors the resonance frequency of the pit structure and provides immediate notification when abnormal vibration occurs. Claim 5 In claim 4, the slope (412) formed on the upper surface of the bottom plate (410) is formed with a width of 100 mm or more and a depth of 50 mm or more to improve water collection and drainage efficiency inside the pit, and the end of the slope is directly connected to a drain, wherein the drain is equipped with a stainless steel mesh filter to prevent the inflow of foreign matter, and a rubber-based packing or a silicone-based packing is inserted into the joint portion between the panel portion (300) and the support frame (200) to block fine gaps that may occur after assembly, thereby ensuring sound insulation and water-blocking performance, wherein the packing possesses a heat resistance of 100°C or more and a pressure resistance of 0.5 MPa or more so that performance does not deteriorate even under external impact or long-term use environments, and a sound insulation panel is additionally attached to the inner and outer sides of the panel portion (300) to reduce noise generated during elevator operation by 40 dB or more, thereby minimizing noise transmission at the joint with the building structure, characterized by a precast module. The elevator pit used.

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