Quickly assembled concrete prefabricated valve well

Abstract

This utility model provides a rapid assembly precast concrete valve well, comprising a foundation concrete pad, a bottom slab, a well body, and a top slab assembled sequentially from bottom to top. The bottom slab is located on the upper surface of the foundation concrete pad, and a water collection pit is provided on the upper surface of the bottom slab. A first positioning frame is provided on the upper surface of the bottom slab, and the well body is installed outside the first positioning frame. The well body includes a lower well body and an upper well body, which are connected vertically by a second positioning frame. A filling layer is provided at the connection between the first and second positioning frames. Each part of the foundation concrete pad, bottom slab, lower well body, upper well body, top slab, and precast well cylinder is an independently installed structural unit. This utility model greatly accelerates the construction progress. Each precast unit is quickly positioned by the positioning frame, and after hoisting into place, the connection is completed by filling the joints with waterproof mortar, simplifying the process.

Description

Technical Field

[0001] This utility model relates to the field of municipal drainage engineering technology, specifically to a rapid assembly precast concrete valve well. Background Technology

[0002] In municipal engineering, valve wells are used to house and protect valves and other equipment in underground pipelines. Traditional valve wells are mostly constructed by on-site formwork and concrete pouring, resulting in long construction periods, complex procedures, and dust pollution from wet on-site work. Furthermore, traditional cast-in-place valve wells are typically monolithic structures, large in size and weight, making transportation and hoisting difficult and requiring sophisticated on-site lifting equipment. The monolithic structure also makes dismantling difficult for later maintenance or relocation, hindering flexible adjustments during pipeline network modifications. In recent years, some prefabricated valve well designs have emerged, which decompose the valve well into several prefabricated components and assemble them on-site. However, existing prefabricated solutions often use horizontal segmentation or other connection methods, limiting adaptability to the shape of the well body. Moreover, the connection and sealing measures of each prefabricated unit are not perfect, potentially affecting the overall structural stability and waterproofing performance. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a rapid assembly precast concrete valve well.

[0004] The specific technical solution is as follows:

[0005] A rapid-assembly precast concrete valve well includes a foundation concrete pad, a bottom slab, a well body, and a top slab assembled sequentially from bottom to top. The bottom slab is located on the upper surface of the foundation concrete pad, and a sump is provided on the upper surface of the bottom slab. A first positioning frame is provided on the upper surface of the bottom slab, and the well body is installed outside the first positioning frame. The well body includes a lower well body and an upper well body, which are connected vertically by a second positioning frame. Several ladders are provided on the inner wall of the well body. The top slab is located at the upper end of the well body, and a manhole and an inspection hole are provided on the top slab. A precast well cylinder is connected above the manhole, and a well cover is fixed to the upper part of the precast well cylinder. A filling layer is provided at the connection between the first positioning frame and the second positioning frame. Each part of the foundation concrete pad, bottom slab, lower well body, upper well body, top slab, and precast well cylinder is an independently installed structural unit, and each structural unit is provided with a lifting lug.

[0006] Optionally, a third positioning frame is provided between the foundation concrete pad and the base plate, and a filling layer is also provided at the connection of the third positioning frame.

[0007] Optionally, the lower wellbore is installed on the outside of the first positioning frame, and the gap between the inner wall of the lower wellbore and the first positioning frame is also filled with a filling layer.

[0008] Optionally, the upper well body is installed on the outside of the second positioning frame, and the gap between the inner wall of the upper well body and the second positioning frame is also filled with a filling layer.

[0009] Optionally, the top plate and the prefabricated well shaft are connected by a fourth positioning frame, and a filling layer is also provided at the connection of the fourth positioning frame.

[0010] Optionally, the wellbore may be selected from cylindrical, prismatic, or conical structures.

[0011] Optionally, the foundation concrete pad layer is made of C15 plain concrete precast slabs.

[0012] Optionally, both the bottom plate and the top plate are made of C25 reinforced concrete precast slabs.

[0013] Optionally, the precast well casing is made of C20 plain concrete.

[0014] Optionally, the filling layer is made of waterproof mortar.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] Construction is quick and efficient: All major components are prefabricated in the factory, and only hoisting and splicing are required on site. There is no need for on-site formwork and pouring, which greatly speeds up the construction progress. Each prefabricated unit is quickly positioned by positioning frame. After hoisting into place, waterproof mortar is filled at the joints to complete the connection. The process is simple.

[0017] Environmentally friendly and pollution-free: It reduces the amount of on-site concrete pouring and earthwork excavation, and avoids dust and noise pollution generated by formwork erection and dismantling and on-site concrete mixing, which is beneficial to environmental protection.

[0018] The structure is robust and waterproof: each connection point is equipped with a positioning frame and a waterproof mortar filling layer, which not only ensures accurate positioning and tight connection between structural units, but also provides a good waterproof seal to prevent groundwater from seeping into the well. The overall structure has sufficient strength and stability;

[0019] Convenient transportation and hoisting: The valve well is broken down into multiple small prefabricated units, each with a small volume and weight, facilitating road transport and on-site hoisting, reducing reliance on large lifting equipment. This solves the problem of traditional integral valve wells being difficult to transport and install due to their excessive size;

[0020] Highly adaptable to different shapes: The well body can be designed into various shapes such as cylindrical, prismatic or conical as needed, by adopting a segmented assembly method. It can adapt to the requirements of different projects for the shape and size of valve wells.

[0021] Facilitates later maintenance and relocation: The prefabricated structure is easy to disassemble. When it is necessary to repair the pipe valves in the well, or when the valve well needs to be moved due to road reconstruction, each prefabricated unit can be easily disassembled and reinstalled in the new location, which improves the flexibility of pipeline reconstruction. Attached Figure Description

[0022] Figure 1 A front sectional view of a rapid assembly precast concrete valve well provided by this utility model;

[0023] Figure 2 A side sectional view of a rapid assembly precast concrete valve well provided for this utility model;

[0024] Figure 3 A top view of a precast concrete valve well for rapid assembly, provided by this utility model.

[0025] In the diagram: 1. Foundation concrete pad; 2. Base slab; 3. Sump; 41. First positioning frame; 42. Second positioning frame; 43. Third positioning frame; 44. Fourth positioning frame; 5. Lower well body; 6. Upper well body; 7. Top slab; 8. Precast well shaft; 9. Well cover; 10. Ladder. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0029] This utility model provides a rapid assembly precast concrete valve well, referring to... Figures 1-3The well structure includes a foundation concrete pad 1, a base slab 2, well bodies (lower well body 5 and upper well body 6), a top slab 7, and a precast well cylinder 8. Below the foundation concrete pad 1 is a compacted gravel foundation (not shown in the figure). The base slab 2 is installed on the foundation concrete pad 1, and a sump 3 is provided on the upper surface of the base slab 2 for drainage. A first positioning frame 41 is pre-embedded in the base slab 2. The lower well body 5 is hoisted to the outside of the first positioning frame 41, and the gap between the lower well body 5 and the first positioning frame 41 is filled with waterproof mortar to form a filling layer. A second positioning frame 42 is also provided on the top of the lower well body 5 for installing the upper well body 6. The upper well body 6 and the lower well body 5 are positioned by the second positioning frame 42 and connected by filling with waterproof mortar. A ladder 10 is provided on the inner wall of the well body for personnel to go up and down. The top slab 7 is installed on the top of the well body, and manholes and inspection holes are reserved on the top slab 7. The precast shaft 8 is connected to the top plate 7 via the fourth positioning frame 44 on the top plate 7. The joint is sealed with waterproof mortar. The top of the precast shaft 8 is fitted with a well cover 9. Each precast component is equipped with a lifting lug for hoisting.

[0030] Foundation construction: Excavate a foundation pit at the valve well installation location and compact the base. Lay a layer of crushed stone about 10cm thick as the foundation bearing layer. Then, lay a precast C15 plain concrete foundation pad 1 on the crushed stone base. The size of the foundation pad 1 is slightly larger than the bottom area of ​​the valve well to provide uniform support.

[0031] Installation of base plate 2: The precast C25 reinforced concrete base plate 2 is hoisted onto the foundation concrete pad 1. A third positioning frame 43 (which can be embedded in the foundation concrete pad 1 or base plate 2) is pre-set on the lower surface of base plate 2 or the upper surface of foundation concrete pad 1. During hoisting, base plate 2 is aligned with the third positioning frame 43 and lowered to ensure accurate positioning of base plate 2. The gap between base plate 2 and pad 1 is filled with waterproof mortar to form a filling layer, which both fixes base plate 2 and prevents groundwater from seeping in from the bottom. A sump pit 3 is pre-set on the upper surface of base plate 2 to collect any water that may accumulate in the well.

[0032] Installation of the lower well body 5: After the base plate 2 is installed, the prefabricated lower well body 5 is hoisted above the base plate 2. A first annular positioning frame 41 is pre-embedded on the upper surface of the base plate 2. The lower well body 5 is a cylindrical structure; its lower inner end is aligned with the first positioning frame 41 as it falls, allowing the lower well body 5 to fit over the outside of the first positioning frame 41 and rest on the base plate 2. After the lower well body 5 is in place, an annular gap will form between its inner wall and the first positioning frame 41. Waterproof mortar is filled into this gap to form a filling layer, thus fixing the lower well body 5 and sealing the interface.

[0033] Pipeline and valve installation: After the lower shaft 5 is installed and fixed, the underground pipelines and valves are installed inside the shaft. If necessary, brick piers or other supports can be built on the base plate 2 to support the valves, and the pipelines and valves to be inspected are installed in the designed positions inside the shaft.

[0034] Installation of Upper Shaft 6: After the installation of pipes and valves is completed, the prefabricated upper shaft 6 is hoisted above the lower shaft 5. A second positioning frame 42 is pre-embedded in the top of the lower shaft 5. The inner side of the lower end of the upper shaft 6 is aligned with the second positioning frame 42 and lowered, so that it fits onto the outer side of the second positioning frame 42 and rests on the lower shaft 5. Similarly, waterproof mortar is filled into the gap between the inner wall of the upper shaft 6 and the second positioning frame 42 to form a filling layer, fixing and sealing the interface between the upper shaft 6 and the lower shaft 5. The upper shaft 6 and the lower shaft 5 together form a complete shaft structure, and a ladder 10 is pre-installed on its inner wall for personnel to go up and down the shaft.

[0035] Installation of Top Plate 7: After the well body is installed, the precast C25 reinforced concrete top plate 7 is hoisted and placed on top of the well body. The dimensions of the top plate 7 match the top of the well body. During hoisting, align it with the position of the well body and lower it, ensuring that the periphery of the top plate 7 rests on the upper edge of the well body. A positioning structure (such as a flange or groove on the bottom of the top plate 7 corresponding to the top of the well body) can also be set between the top plate 7 and the well body to assist in positioning. After the top plate 7 is in place, waterproof mortar can be applied to seal the joint between it and the well body.

[0036] Installation of precast manhole shaft 8 and manhole cover 9: At the manhole on the top slab 7, the precast C20 plain concrete manhole shaft 8 is hoisted. A fourth positioning frame 44 is embedded around the manhole on the upper surface of the top slab 7. The lower end of the precast manhole shaft 8 is aligned with the fourth positioning frame 44 and lowered, fitting over the outside of the fourth positioning frame 44 and resting on the top slab 7. The gap between the precast manhole shaft 8 and the fourth positioning frame 44 is filled with waterproof mortar to form a filling layer, securing the precast manhole shaft 8 and preventing rainwater or groundwater seepage. Finally, the manhole cover 9 is installed on top of the precast manhole shaft 8. The manhole cover 9 is typically made of cast iron or composite materials and is used to seal the manhole opening and bear ground loads.

[0037] In the above embodiment, the well body is divided into two units: a lower well body 5 and an upper well body 6. In practical applications, the well body can be divided into more prefabricated sections, each with an appropriate height, depending on the depth of the valve well and transportation conditions, to facilitate manufacturing, transportation, and hoisting. Each section is connected using the aforementioned positioning frame and filling layer method to ensure a firm connection and reliable waterproofing.

[0038] In the above embodiments, the concrete strength grades of each precast component are as follows: foundation concrete pad 1 is C15 plain concrete, bottom slab 2 and top slab are 7C25 reinforced concrete, precast well shaft is 8C20 plain concrete, and the well body structural unit can be made of C30 reinforced concrete to meet the structural stress requirements. The filling layer uses waterproof mortar, which has certain strength and impermeability to ensure that the joints do not leak water.

[0039] In the above embodiments, the cross-sectional shape of the well body is circular (cylindrical). Depending on engineering needs, the well body can also be designed as square or other prismatic shapes, or even a frustum shape with a smaller top and larger bottom. As long as positioning frames of appropriate shapes are set at each connection point, accurate docking of the upper and lower prefabricated sections can be achieved. Therefore, this invention has strong adaptability to the shape of valve wells.

[0040] In the above embodiments, each prefabricated component is equipped with lifting lugs, which are typically metal components embedded in the concrete and used to connect lifting wire ropes. By providing lifting lugs, it is convenient to use a crane to lift each component into place, thus improving construction efficiency.

[0041] In summary, the rapid assembly precast concrete valve well described in this utility model significantly accelerates the construction speed of valve wells and reduces construction difficulty and environmental impact through factory prefabrication and on-site assembly. At the same time, its modular design and reliable connection structure ensure the structural safety and waterproof performance of the valve well, and provide convenience for subsequent maintenance and modification.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rapid assembly precast concrete valve well, characterized in that, The structure comprises, from bottom to top, a foundation concrete pad, a bottom slab, a well body, and a top slab. The bottom slab is located on the upper surface of the foundation concrete pad, and a sump is provided on the upper surface of the bottom slab. A first positioning frame is provided on the upper surface of the bottom slab, and the well body is installed outside the first positioning frame. The well body includes a lower well body and an upper well body, which are connected vertically by a second positioning frame. Several ladders are provided on the inner wall of the well body. The top slab is located at the upper end of the well body, and a manhole and an inspection hole are provided on the top slab. A prefabricated well cylinder is connected above the manhole, and a well cover is fixed to the upper part of the prefabricated well cylinder. A filling layer is provided at the connection between the first positioning frame and the second positioning frame. Each of the foundation concrete pad, bottom slab, lower well body, upper well body, top slab, and prefabricated well cylinder is an independently installed structural unit, and each structural unit is provided with a lifting lug.

2. The rapid assembly precast concrete valve well according to claim 1, characterized in that, A third positioning frame is provided between the foundation concrete pad and the base plate, and a filling layer is also provided at the connection of the third positioning frame.

3. The rapid assembly precast concrete valve well according to claim 1, characterized in that, The lower well body is installed on the outside of the first positioning frame, and the gap between the inner wall of the lower well body and the first positioning frame is also filled with a filling layer.

4. The rapid assembly precast concrete valve well according to claim 1, characterized in that, The upper well body is installed on the outside of the second positioning frame, and the gap between the inner wall of the upper well body and the second positioning frame is also filled with a filling layer.

5. The rapid assembly precast concrete valve well according to claim 1, characterized in that, The top plate and the precast well shaft are connected by a fourth positioning frame, and a filling layer is also provided at the connection of the fourth positioning frame.

6. The rapid assembly precast concrete valve well according to claim 1, characterized in that, The wellbore is selected from cylindrical, prismatic, or conical structures.

7. The rapid assembly precast concrete valve well according to claim 1, characterized in that, The foundation concrete pad layer is made of C15 plain concrete precast slabs.

8. The rapid assembly precast concrete valve well according to claim 1, characterized in that, Both the bottom slab and the top slab are made of C25 reinforced concrete precast slabs.

9. The rapid assembly precast concrete valve well according to claim 1, characterized in that, The precast well casing is made of C20 plain concrete.

10. The rapid assembly precast concrete valve well according to claim 1, characterized in that, The filling layer is made of waterproof mortar.

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