An assembled water sump

Abstract

The utility model discloses an assembly type catch basin, including by the pit bottom and lateral wall of the standardization prefabricated board of multiple pieces through the connecting mechanism assembly, connecting mechanism can realize the stable connection between adjacent prefabricated board and allow through the adjustment prefabricated board's number to adapt to different specifications catch basin size. Prefabricated board is standardized production in factory, and quality is stable, and size is accurate, and the influence of pit bottom ponding to concrete quality is avoided in on -the -spot assembly, and the overall strength, durability and size accuracy of catch basin are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a prefabricated water collection pit. Background Technology

[0002] In today's construction engineering field, basements, as an important component of buildings, bear many critical functions such as parking, equipment placement, and material storage. The proper design of basement sump pits is crucial for effectively draining accumulated water and ensuring the normal functioning of the basement.

[0003] The construction of basement sump pits is significantly affected by groundwater levels and geological conditions. For sites with high groundwater levels and high permeability, even with drainage methods such as wells and pumps, it is difficult to completely drain the seepage water from the sump pit. This situation severely impacts all subsequent stages of the sump pit construction. For example, during formwork erection, water accumulation causes poor contact between the formwork and the pit bottom, compromising stability and positioning accuracy, increasing the difficulty of formwork erection, and leading to deviations in the sump pit's dimensions. During the pouring stage, water at the bottom of the pit dilutes the concrete, altering the water-cement ratio, reducing concrete strength and durability, and causing quality defects. During the sump pit's pouring and shaping process, water accumulation delays concrete setting and can even cause uneven settlement, affecting structural performance and appearance. Furthermore, dealing with water accumulation and repairing affected construction stages significantly prolongs the construction period and increases costs.

[0004] More seriously, in areas with excessive seepage, the buoyancy of groundwater can cause the formwork to float and deform during the pouring of the sump. In the early stages of concrete pouring, before the concrete has fully hardened, its restraining effect on the formwork is weak. Excessive buoyancy at this time can cause the entire formwork to float. Simultaneously, uneven seepage distribution leads to uneven buoyancy on the formwork, resulting in localized deformation. The floating and deformation of the formwork directly disrupts the geometry of the concrete pour, causing the sump dimensions to be substandard and unable to meet design requirements. Furthermore, this problem can cause discontinuities in the internal structure of the concrete, reducing the load-bearing capacity and waterproofing performance of the sump, severely impacting the normal use and durability of the basement.

[0005] In summary, the numerous problems related to water seepage at the bottom of the sump during the construction of traditional sump pits severely restrict the quality, progress, and safety of sump pit construction. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a prefabricated water collection pit, which aims to overcome at least one related technical problem existing in the background art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a prefabricated water collection pit, including a pit bottom and sidewalls assembled from multiple standardized prefabricated slabs by a connecting mechanism. The connecting mechanism can achieve a stable connection between adjacent prefabricated slabs and allows the size of the water collection pit to be adapted to different specifications by adjusting the number of prefabricated slabs.

[0008] This invention transforms the traditional monolithic casting process into modular assembly, fundamentally avoiding water accumulation in the pit and achieving efficient and flexible construction.

[0009] As a further optimization, the prefabricated panels are available in sizes of 500mm×500mm×300mm or 600mm×600mm×400mm. Standardized dimensions are the basis for achieving economies of scale and flexible combinations.

[0010] To ensure a firm connection of the pit bottom structure, effectively transfer loads, and prevent uneven settlement, the connection mechanism includes mechanical connectors mounted on the precast slab at the bottom of the pit, as a specific implementation of the connection mechanism.

[0011] In some alternative embodiments, the mechanical connector is an extended reinforcing bar pre-installed around the perimeter of the precast slab at the bottom of the pit. Precast slabs at adjacent pit bottoms are connected to each other via these extended reinforcing bars, and concrete is poured at the connection joint. This arrangement allows the precast slabs at adjacent pit bottoms to be initially positioned and fixed via mechanical connections of the reinforcing bars (such as sleeve connections or welding), and then a rigid whole is formed by pouring concrete at the connection joint, combining the advantages of assembly speed and cast-in-place integral construction.

[0012] In some alternative embodiments, the connection mechanism includes a grouting connector disposed on the precast slab of the sidewall. This connection method offers high precision and effectively ensures the flatness of the sidewall.

[0013] In some optional embodiments, the grouting connector includes a steel sleeve embedded in one side of the precast slab in the sidewall and a reserved reinforcing bar on the other side. Grout is injected into the steel sleeve to connect adjacent precast slabs. In some optional embodiments, a sealing mechanism is also included at the joint between adjacent precast slabs.

[0014] In some alternative embodiments, the sealing mechanism is a water-swellable waterstop strip. This waterstop strip is installed in a dry state and expands upon contact with groundwater, automatically tightening and sealing the joint, thus providing good compensation for construction and installation errors.

[0015] To flexibly adapt to different sump depths required by design specifications, in some optional embodiments, the sidewalls are constructed by stacking multiple layers of prefabricated sidewall panels to accommodate varying sump depths. This is key to achieving modularity in the sump depth dimension.

[0016] To fine-tune the planar dimensions of the sump bottom for a more precise fit to the design dimensions, in some alternative implementations, the planar dimensions of the sump bottom are adjusted by changing the lap length of the outward reinforcing bars between adjacent precast slabs. The change in lap length is equivalent to fine-tuning the spacing between the precast slabs, thus achieving continuous dimensional adjustability.

[0017] The beneficial effects that a prefabricated sump disclosed in this application may bring include, but are not limited to: 1. High construction quality: Precast slabs are produced in a standardized manner in the factory, ensuring stable quality and precise dimensions; on-site assembly avoids the impact of water accumulation at the bottom of the pit on the quality of the concrete, ensuring the overall strength, durability and dimensional accuracy of the sump pit.

[0018] 2. Low production cost: Standard modular design enables large-scale production, significantly reducing unit cost; no need to customize special molds for multiple specifications, reducing production input and material waste.

[0019] 3. Short construction period: Factory prefabrication and other on-site processes can be carried out in parallel. Only assembly is required on-site, without the need for curing or waiting, which greatly shortens the critical construction period.

[0020] 4. Good construction safety: It avoids the risk of personnel working in water-filled pits; the weight of the precast slabs is moderate, reducing the risk of hoisting and handling; there is no risk of formwork floating.

[0021] 5. Excellent waterproof performance: The joints between modules are sealed with water-swellable sealing strips, forming an active waterproof barrier with high waterproof reliability. Attached Figure Description

[0022] Figure 1 This is an assembly diagram of the prefabricated sump pit according to an embodiment of this application; Figure 2 This is a schematic diagram of the prefabricated slab of the sidewall in an embodiment of this application.

[0023] Illustration: 1-Precast slab at the bottom of the pit, 2-Precast slab on the side wall, 3-Mechanical connector, 4-Sealing mechanism, 5-Grouting connector. Detailed Implementation

[0024] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or 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.

[0026] like Figure 1-2 As shown, a prefabricated sump includes a pit bottom and sidewalls assembled from multiple standardized prefabricated slabs by a connecting mechanism. The connecting mechanism enables a stable connection between adjacent prefabricated slabs and allows for the adaptation of sump sizes of different specifications by adjusting the number of prefabricated slabs.

[0027] To overcome the drawbacks of traditional sump pits, such as high customized production costs, difficult on-site wet operations, and low efficiency due to their diverse specifications, this embodiment employs a technique where multiple standardized precast slabs are assembled into the pit bottom and sidewalls using a connecting mechanism. The connecting mechanism is designed to achieve a stable connection between adjacent precast slabs and allows for flexible adaptation to sump pit specifications of different lengths, widths, and depths by simply increasing or decreasing the number of precast slabs. This design transforms traditional monolithic casting into modular assembly, fundamentally avoiding water accumulation within the pit and achieving efficient and flexible construction.

[0028] To achieve large-scale industrial production of precast panels, reduce unit production costs, and facilitate transportation and management, as a further optimization, the precast panels are specified in dimensions of 500mm×500mm×300mm or 600mm×600mm×400mm. Standardized dimensions are the foundation for achieving economies of scale and flexible combination.

[0029] It should be noted that the size of the precast slab can be adjusted according to common sump modules, such as 400mm×400mm×200mm or 800mm×800mm×400mm and other specifications. The key is the standardization of the size, rather than the specific value.

[0030] To ensure a firm connection of the pit bottom structure, effectively transfer loads, and prevent uneven settlement, the connection mechanism includes a mechanical connector 3 installed on the precast slab 1 at the bottom of the pit, as a specific implementation of the connection mechanism.

[0031] Specifically, the mechanical connector 3 is not limited to steel bars, but can also be embedded iron parts, connecting plates, bolt holes, or other components that can achieve rigid connection through welding, bolting, or pinning.

[0032] To provide a high-strength, reliable, and easy-to-construct pit bottom connection solution, as a further refinement, in some optional embodiments, the mechanical connector 3 is an outwardly extending reinforcing bar pre-installed around the perimeter of the precast slab 1 at the pit bottom. Adjacent precast slabs 1 at the pit bottom are connected to each other via this outwardly extending reinforcing bar, and concrete is poured at the connection joint. This arrangement allows the precast slabs 1 at adjacent pit bottoms to achieve initial positioning and fixation through mechanical connections of the reinforcing bars (such as sleeve connections or welding), and then form a rigid whole by pouring concrete at the connection joint, combining the advantages of assembly speed and cast-in-place integral construction. It should be noted that the built-in reinforcing bars of the precast slabs located at both ends can be built-in only on the required side, as needed.

[0033] For example, the mechanical connection methods for reinforcing bars can be straight thread sleeves, tapered thread sleeves, extrusion sleeves, etc. The materials used for on-site casting can also be high-strength cement-based grouting materials, etc.

[0034] To ensure the verticality, integrity, and impermeability of the sidewall connection, as another specific implementation of the connection mechanism, in some optional embodiments, the connection mechanism includes a grouting connector 5 disposed on the precast slab 2 of the sidewall. This connection method has high precision and can effectively ensure the flatness of the sidewall.

[0035] Of course, the grouting connector 5 is not limited to a semi-grouting sleeve, but can also be a full grouting sleeve, grout anchor lap connection, etc.

[0036] To provide a standardized, high-strength, and efficient sidewall connection solution, as a further refinement, in some embodiments, the grouting connector 5 includes a steel sleeve pre-embedded on one side of the precast slab 2 in the sidewall and a reserved reinforcing bar on the other side. Grout is injected into the steel sleeve to connect adjacent precast slabs. During installation, the reserved reinforcing bar is inserted into the steel sleeve of the adjacent precast slab, and grout is injected into the sleeve. After curing, a reliable connection is formed. This method is suitable for the assembly of vertical components and can effectively adapt to changes in sidewall height.

[0037] As a variation of the above scheme, the positions of the sleeve and the reinforcing bar can be interchanged, that is, the reinforcing bar is reserved on one side, and a metal corrugated pipe or other form of channel is pre-embedded on the other side for the reinforcing bar to be inserted and grouted.

[0038] In order to address the potential leakage risks at the joints of prefabricated components and ensure the overall waterproof performance of the sump, some embodiments also include a sealing mechanism 4 installed at the joints of adjacent prefabricated slabs.

[0039] To provide a waterproofing solution that is easy to construct, highly adaptable, and provides excellent sealing, as a further optimization, in some embodiments, the sealing mechanism 4 is a water-swellable waterstop strip. This waterstop strip is installed in a dry state and expands upon contact with groundwater, automatically tightening and sealing the joint, thus providing good compensation for construction and installation errors. The waterstop strip can be installed by adhesive bonding, slot embedding, or fixing with steel nails.

[0040] It should be noted that the sealing mechanism 4 is not limited to water-swellable waterstop strips, but can also be the tongue and groove structure of the precast slab itself, the waterstop steel plate embedded during prefabrication, or the sealant filled after assembly, etc.

[0041] To flexibly adapt to different sump depths required by design specifications, in some embodiments, the sidewalls are constructed by stacking multiple layers of prefabricated sidewall slabs 2 to accommodate varying sump depths. This is key to achieving modularity in the sump depth dimension.

[0042] To fine-tune the planar dimensions of the sump bottom and make it more precisely match the design dimensions, in some embodiments, the planar dimensions of the sump bottom are fine-tuned by adjusting the lap length of the outward reinforcing bars between adjacent precast slabs 1. The change in lap length is equivalent to fine-tuning the spacing between the precast slabs, thus achieving continuous dimensional adjustment.

[0043] This utility model provides an assembled sump pit based on standard precast slabs. Its core working principle lies in breaking down the whole into parts, prefabrication first, dry method as the main approach, and flexible adaptation. It breaks down the traditional monolithic cast-in-place sump pit into several standardized precast slabs, which are prefabricated in the factory and then assembled on the construction site like "building blocks," thus fundamentally avoiding a series of problems caused by wet work at the bottom of the seepage pit.

[0044] Its specific working principle can be explained from the following four aspects: 1. Modular decomposition and standardized design principles: Traditional sump pits are constructed as a whole, and their diverse specifications make standardized production impossible.

[0045] This invention breaks with conventional thinking by structurally decomposing the bottom and sidewalls of the sump into multiple discrete, uniformly sized standard units—prefabricated slabs. This modular design follows the standardization principles of industrial products, enabling complex construction projects to be transformed into large-scale factory production of standardized components. Its working principle is to meet an infinite variety of sump specifications through a limited number of standard modules arranged in different combinations. This not only significantly improves production efficiency and reduces unit costs but also lays the foundation for rapid and flexible on-site assembly and construction.

[0046] 2. Force transmission and integral forming principle of the connecting mechanism: Individual precast slabs are separate and must be combined into a whole structure through a reliable connecting mechanism to withstand earth pressure, water pressure, and external loads. This utility model designs differentiated connection methods for the different stress characteristics of the pit bottom and sidewalls.

[0047] For the pit bottom: a composite connection principle of "mechanical connection + cast-in-place concrete" is adopted. The working process is as follows: First, through the mechanical connection of the protruding steel bars of the precast slabs, the initial connection between the slabs is quickly established, achieving precise positioning and bearing the construction load; then, concrete is poured at the joints, and after it hardens, the force flow (load) transmission path transitions from "mechanical connection" to "integral force transmission of cast-in-place concrete", thereby forming a complete and rigid bottom slab from the dispersed precast slabs 1 of the pit bottom, whose mechanical properties are equivalent to those of a cast-in-place structure.

[0048] For the sidewalls: a bonding and anchoring principle of "reinforcing steel - grout - sleeve" is adopted. The process is as follows: the reinforcing steel pre-installed on one side of the precast slab is inserted into a sleeve pre-embedded in the other side of the precast slab, and then high-strength, non-shrink grout is injected into the sleeve. After the grout solidifies, the reinforcing steel is firmly anchored within the sleeve through its adhesion to the surface of the reinforcing steel, its gripping force with the inner wall of the sleeve, and its own micro-expansion characteristics. This principle enables effective and continuous force transfer between adjacent precast slabs, ensuring the strength and rigidity of the vertical component connection, making the sidewall a unified whole.

[0049] 3. Principle of flexible size adaptation: Another key working principle of this invention is to utilize the discreteness of standard modules to achieve continuous dimensional adjustment. Planar dimensional adaptation: The length and width of the bottom of the sump are no longer fixed, but are determined by the number (N) of standard slabs and the size (L) of each slab (total length ≈ N × L). By increasing or decreasing the number of precast slabs, large adjustments can be made in units of module L, similar to adjusting the length of a ruler. Furthermore, by adjusting the lap length of the reinforcing bars between slabs or the width of the cast-in-place strip, fine-tuning of the dimensions can be achieved, thus precisely matching the design dimensions.

[0050] Depth Adaptation: The depth of the sump is achieved by stacking the precast slabs 2 on the side walls. Each additional slab increases the depth by one slab height (H). This principle allows a standard slab type to adapt to various sump depth requirements, achieving a "one-to-many" effect.

[0051] 4. Sealing and waterproofing principle: Addressing the issue of numerous joints in prefabricated structures, this invention employs an "active waterproofing" principle. An expansion seal strip, installed at the joints, is placed in a dry state. When groundwater seeps into the joint, the seal strip expands upon contact with water (typically several times its original volume), generating expansion pressure. This pressure automatically tightens and fills all possible seepage paths (joint gaps, capillaries, etc.), achieving a self-sealing effect. This principle provides excellent compensation and self-adaptation to minor gaps and errors introduced during construction and installation, ensuring the reliability of the overall waterproofing system.

[0052] The construction method of this utility model is as follows: Precast concrete slab production: Precast slabs are uniformly processed into dimensions of 500mm × 500mm × 300mm. High-precision molds are used during precast slab production to ensure dimensional accuracy. High-quality concrete is selected and mixed strictly according to the mix proportions to guarantee concrete strength and durability. When precasting slab 1 at the bottom of the sump, 150mm long reinforcing bars are pre-installed around its four perimeters. These reinforcing bars should be rust-proofed, and their specifications and materials must be determined based on the design load-bearing capacity of the sump. For precast slab 2 on the side walls, steel sleeves are pre-embedded on one side, and reinforcing bars compatible with the steel sleeves are pre-installed on the other side. The position and specifications of the steel sleeves must strictly adhere to design requirements to ensure subsequent connection accuracy.

[0053] Construction site preparation: When constructing the basement raft foundation up to the sump location, the bottom of the sump should first be leveled to ensure that the flatness error is within the allowable range, providing a good foundation for the installation of precast slabs. Simultaneously, according to the design dimensions of the sump, the installation positions and connection nodes of the precast slabs should be marked on the bottom of the sump. Lifting equipment, such as a small crane or electric hoist, should be prepared, ensuring its lifting capacity meets the requirements for lifting the precast slabs, and a safety inspection of the equipment should be conducted.

[0054] Installation of precast slab 1 at the bottom of the pit: Using hoisting equipment, the precast slab 1 at the bottom of the pit is lifted to the marked position. According to design requirements, the first precast slab is placed in place first, and then adjacent precast slabs are lifted in sequence, bringing the pre-reserved reinforcing bars around the perimeter of adjacent slabs closer together. Mechanical connections are used, such as using threaded sleeves to connect adjacent reinforcing bars. During the connection process, a torque wrench must be used to ensure a secure connection, reaching the design torque value. After completing the mechanical connection, formwork is erected at the gaps between the precast slabs. The formwork should have sufficient strength and sealing to prevent grout leakage during concrete pouring. Subsequently, high-strength fine aggregate concrete is poured into the gaps, and the concrete must be vibrated to ensure a tight connection between the precast slabs. By increasing or decreasing the number of precast slabs and adjusting the lap length of the reinforcing bars, the length and width of the bottom of the sump can be flexibly adjusted to meet the requirements of sumps of different specifications.

[0055] Installation of precast slab 2 on the side wall: After the concrete connecting the precast slab 1 at the bottom of the pit reaches a certain strength, the installation of the precast slabs 2 for the side walls begins. Similarly, using hoisting equipment, the precast slabs 2 for the side walls are lifted to the corresponding positions at the bottom of the pit, aligning the steel sleeves on the side wall slabs 2 with the pre-reserved reinforcing bars of the precast slab 1 at the bottom of the pit or the pre-reserved reinforcing bars of the already installed side wall slabs 2. Then, high-strength, non-shrink grout is injected into the steel sleeves, using specialized grouting equipment to ensure full filling. During the grout's solidification process, external forces should be avoided to disturb the precast slabs. Following this method, the precast slabs 2 for the side walls are installed one by one, completing the construction of the sump pit side walls. The height of the sump pit is adjusted by increasing or decreasing the number of layers of precast slabs 2 for the side walls, based on the designed depth of the sump pit.

[0056] Installation of seepage prevention measures: After all precast slabs are connected, install expansion seal strips at the joints of the precast components. First, clean the surface of the joint, ensuring it is clean, dry, and free of oil, dust, or other impurities. Then, adhere the expansion seal strip to one side of the joint, using a special adhesive to ensure a firm bond. During the application process, pay attention to the continuity of the seal strip to avoid any breaks or gaps. For overlapping sections of the seal strip, use an overlapping method with an overlap length not less than the specified value, and reinforce the joint with adhesive to ensure effective water penetration when it expands upon contact with water.

[0057] Detail handling and inspection: Inspect the interior of the sump, checking for flatness at the precast slab connections and any signs of leakage or misalignment. Grind the bottom and sidewalls of the sump to remove any unevenness caused by concrete pouring or precast slab production, ensuring a smooth inner surface for efficient drainage. Also, check the installation of the expansion joint strips to ensure they are not detached or misaligned. Finally, inspect the overall structure of the sump, measuring its dimensions to ensure they meet design requirements and verifying that the connections meet load-bearing capacity requirements.

[0058] Through the above specific implementation methods, this prefabricated sump can flexibly adapt to different specifications, ensuring construction quality and waterproof performance while reducing production costs and improving construction efficiency and safety.

[0059] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A prefabricated water collection pit, characterized in that, It includes the pit bottom and sidewalls, which are assembled from multiple standardized prefabricated slabs by a connecting mechanism. The connecting mechanism can achieve a stable connection between adjacent prefabricated slabs and allows the size of the sump pit to be adapted to different specifications by adjusting the number of prefabricated slabs.

2. The prefabricated water collection pit according to claim 1, characterized in that, The precast slab has a size of 500mm×500mm×300mm or 600mm×600mm×400mm.

3. The prefabricated water collection pit according to claim 1 or 2, characterized in that, The connecting mechanism includes a mechanical connector (3) disposed on the precast slab (1) at the bottom of the pit.

4. The prefabricated water collection pit according to claim 3, characterized in that, The mechanical connector (3) is an extended steel bar reserved around the perimeter of the precast slab (1) at the bottom of the pit. The precast slabs (1) at adjacent pit bottoms are connected to each other through the extended steel bar, and concrete is poured at the connection node.

5. The prefabricated water collection pit according to claim 1 or 2, characterized in that, The connection mechanism includes a grouting connector (5) disposed on a precast slab (2) on the side wall.

6. The prefabricated sump pit according to claim 5, characterized in that, The grouting connector (5) includes a steel sleeve embedded in one side of the precast slab (2) on the side wall and a reserved reinforcing bar on the other side. Grouting material is injected into the steel sleeve to achieve the connection between adjacent precast slabs.

7. The prefabricated sump pit according to claim 1, characterized in that, It also includes a sealing mechanism (4) installed at the joint of adjacent precast slabs.

8. The prefabricated water collection pit according to claim 7, characterized in that, The sealing mechanism (4) is a water-swellable sealing strip.

9. The prefabricated water collection pit according to claim 1, characterized in that, The sidewalls are adapted to different sump depths by stacking prefabricated slabs (2) of multiple sidewalls.

10. The prefabricated water collection pit according to claim 4, characterized in that, The planar dimensions of the bottom of the sump pit are adjusted by adjusting the lap length of the extended steel bars between the precast slabs (1) of adjacent pit bottoms.

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