Intelligent fabricated prestressed underground space structure and construction method thereof

Abstract

The invention discloses an intelligent fabricated prestressed underground space structure and a construction method thereof, and belongs to the technical field of building construction.The intelligent fabricated prestressed underground space structure comprises a starting part, a middle part and a terminating part, the starting part is fixedly connected with the middle part, the middle part is fixedly connected with the terminating part, and the middle part comprises a first supporting part, a first bottom plate, a first connecting part and a first clamping groove; the first supporting piece is arranged on the first bottom plate, one end of the top of the first supporting piece is fixedly connected with a first connecting piece, and a first clamping groove is formed in the corresponding end of the first supporting piece. According to the intelligent assembly type prestressed underground space structure and the construction method thereof, the initial part, the intermediate part and the termination part are reasonably arranged, the size is optimized in cooperation with the BIM technology, the durability is enhanced through nano graphene modified epoxy resin, an intelligent tensioning system and a three-dimensional laser scanner are used for monitoring, the waterproof performance is good, the intelligent degree is high, and the construction efficiency is high. And the construction process is scientific and standard, the construction period is shortened, management and maintenance are facilitated, and the structural quality and the service life are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to an intelligent assembled prestressed underground space structure and a construction method thereof. Background Art

[0002] With the rapid development of urban construction, the development and utilization of underground space is becoming increasingly widespread, such as in underground parking lots, underground shopping malls, and underground pipeline corridors. Traditional underground space structures often face challenges during construction, including long construction periods, frequent on-site wet work, and significant environmental impacts. Furthermore, the structures also have limitations in terms of waterproofing, durability, and intelligent monitoring. Furthermore, the assembly of underground space structures presents challenges in ensuring the stability and sealing of connections between components, as well as the accuracy of prestressing. Summary of the Invention

[0003] The purpose of the present invention is to provide an intelligent prestressed underground space structure and a construction method thereof. By reasonably setting the starting parts, intermediate parts and end parts, adopting a specific connection method, waterproof measures such as a waterproof layer and a water stop strip, and an intelligent sensing layer on the inner wall, combined with BIM technology to optimize the size, nano-graphene modified epoxy resin to enhance durability, an intelligent tensioning system and a three-dimensional laser scanner for monitoring, the assembly is simple and efficient, the connection is stable, the waterproofness is good, the degree of intelligence is high, the durability is good, and the construction process is scientific and standardized, which not only shortens the construction period, but also facilitates management and maintenance, and ensures the quality and service life of the structure.

[0004] To achieve the above-mentioned objectives, the present invention provides an intelligent assembled prestressed underground space structure, including a starting piece, an intermediate piece and an ending piece. The starting piece is fixedly connected to the intermediate piece, and the intermediate piece is fixedly connected to the ending piece. The intermediate piece includes a first support piece, a first base plate, a first connecting piece and a first slot. The first support piece is placed on the first base plate, and one end of the top of the first support piece is fixedly connected to the first connecting piece, and the corresponding end thereof is provided with a first slot.

[0005] Preferably, the starting member includes a second supporting member, a second bottom plate, and a second connecting member. The second supporting member is placed on the second bottom plate, and the top of one end of the second supporting member connected to the middle member is fixedly connected to the second connecting member.

[0006] The terminating member comprises a third supporting member, a third bottom plate and a second slot. The third supporting member is placed on the third bottom plate. The top of one end of the third supporting member connected to the middle member is provided with a second slot.

[0007] Preferably, the outer walls of the first support member, the second support member, and the third support member are all fixedly connected to a waterproof layer, the outer side of the waterproof layer is fixedly connected to a structural layer, and the inner walls of the first support member, the second support member, and the third support member are all fixedly connected to an intelligent sensing layer.

[0008] Preferably, the first support member includes a first top plate and two first side plates, the first side plates are fixedly connected to both sides of the first top plate, the connection between the first top plate and the first side plates is injected with nano-graphene modified epoxy resin, the bottom end of the first side plate is placed in the trapezoidal groove of the first bottom plate, the shape of the bottom end of the first side plate is adapted to the shape of the trapezoidal groove, and half of the first connecting member is cast with the first top plate and the first side plate.

[0009] Preferably, both ends of the first top plate are stepped, and the top shape of the first side plate is adapted to the end shape of the first top plate. A first reserved pipe is provided in the middle of the first top plate and the first side plate, and a connecting hole is provided at the bottom end of the first side plate. A slide groove is provided on the outer wall of the first side plate. The ends of the first top plate are fixedly connected to the first water stop strips. There are four first water stop strips, which are symmetrically installed at the two ends of the first top plate.

[0010] Preferably, the first connecting member and the second connecting member have the same structure, a slider is fixedly connected to the first connecting member, the slide groove and the slider are both trapezoidal structures, the slider is placed on the inner wall of the first connecting member, and a second water stop strip is provided on the inner side of the slider, and the second water stop strip is fixedly installed on the inner wall of the first connecting member.

[0011] Preferably, the second support member includes a second top plate and two second side plates, the second top plate has the same structure as the first top plate, and the connection method between the second top plate and the second side plate is the same as the connection method between the first top plate and the first side plate.

[0012] Preferably, the third support member includes a third top plate and two third side plates, the third top plate has the same structure as the first top plate, the third side plate has the same structure as the first side plate, and the connection method between the third top plate and the third side plate is the same as the connection method between the first top plate and the first side plate.

[0013] Preferably, the first base plate, the second base plate and the third base plate have the same structure, and two second reserved pipes and two third reserved pipes are opened on the first base plate. The second reserved pipes are parallel to the axial direction of the first support member, and the third reserved pipes are parallel to the radial direction of the first support member.

[0014] The present invention also provides a construction method of the above-mentioned intelligent assembled prestressed underground space structure, comprising the following steps:

[0015] Step 1: Construction preparation: Use BIM technology to conduct 3D modeling, optimize component size matching, and obtain the dimensions of each structure;

[0016] Step 2: Structural prefabrication: Use concrete to cast each component. After the first top plate and the first side plate are cast, half of the first connecting piece is cast together with the first top plate and the first side plate. The second top plate and the second side plate are cast in the same way. The third top plate and the third side plate are cast in concrete respectively. Nanographene-modified epoxy resin is injected into the joints between the first top plate and the first side plate, the second top plate and the second side plate, and the third top plate and the third side plate.

[0017] Step 3: Foundation treatment: After excavating the foundation trench, lay the cushion layer and install the guide rail system on the cushion layer;

[0018] Step 4, main structure assembly: hoist the second base plate into place, weld it to the foundation embedded parts, install the second support member, push the bottom of the second side plate into the trapezoidal groove of the second base plate, insert the annular steel strand into the first reserved pipe, insert the radial steel strand into the third reserved pipe, and fix the second side plate to the second base plate. Then hoist the middle piece. When the middle piece slides toward the starting piece, push the first slot toward the slider until the slider is completely inserted into the slide slot, and fix the middle piece. Then use the same method to hoist the end piece. After hoisting the end piece, insert the axial steel strand into the second reserved pipe.

[0019] Step 5. Apply prestress: After assembly is completed, the self-repair function of the nano-epoxy resin is activated by electrical heating, and an intelligent tensioning system is used to perform initial and final tensioning. During the prestressing process, a three-dimensional laser scanner is used to detect deformation, and data is collected in real time through the terminal.

[0020] Therefore, the present invention adopts the above-mentioned intelligent assembled prestressed underground space structure and its construction method, by reasonably setting the starting parts, intermediate parts and ending parts, adopting specific connection methods, waterproof measures such as waterproof layers and water stop strips, and inner wall intelligent sensing layers, combined with BIM technology to optimize size, nano-graphene modified epoxy resin to enhance durability, intelligent tensioning system and three-dimensional laser scanner monitoring, it is simple and efficient in assembly, with stable connections, good waterproofness, high degree of intelligence, good durability, and scientific and standardized construction process, which not only shortens the construction period, but also facilitates management and maintenance, and ensures the quality and service life of the structure.

[0021] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of an embodiment of an intelligent assembled prestressed underground space structure and a construction method thereof according to the present invention;

[0023] Figure 2 This is a schematic diagram of the starting component structure of an embodiment of an intelligent assembled prestressed underground space structure and a construction method thereof according to the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of an intermediate component of an embodiment of an intelligent assembled prestressed underground space structure and a construction method thereof according to the present invention;

[0025] Figure 4 This is a schematic diagram of the termination structure of an intelligent assembled prestressed underground space structure and a construction method thereof according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the first top plate structure of an embodiment of an intelligent assembled prestressed underground space structure and a construction method thereof according to the present invention;

[0027] Figure 6 This is a schematic diagram of the first side panel structure of an embodiment of an intelligent assembled prestressed underground space structure and a construction method thereof according to the present invention;

[0028] Figure 7 This is a cross-sectional view of the first top plate of an embodiment of an intelligent assembled prestressed underground space structure and a construction method thereof according to the present invention;

[0029] Figure 8 This is a schematic structural diagram of the first connecting piece (viewed from the inside out) of an embodiment of an intelligent assembled prestressed underground space structure and a construction method thereof according to the present invention.

[0030] Reference numerals

[0031] 1. Starting piece; 2. Intermediate piece; 3. Ending piece; 4. First connecting piece; 5. Second connecting piece; 6. First top plate; 7. First bottom plate; 8. First side plate; 9. Second top plate; 10. Second bottom plate; 11. Second side plate; 12. Third top plate; 13. Third bottom plate; 14. Third side plate; 15. First reserved pipe; 16. Second reserved pipe; 17. Third reserved pipe; 18. First water stop; 19. Second water stop; 20. First card slot; 21. Second card slot; 22. Intelligent sensing layer; 23. Structural layer; 24. Waterproof layer; 25. Slider. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0033] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] Example 1

[0035] like Figures 1 to 8 As shown, the present invention provides an intelligent assembled prestressed underground space structure, including a starting piece 1, an intermediate piece 2 and an ending piece 3. The starting piece 1 is fixedly connected to the intermediate piece 2, and the intermediate piece 2 is fixedly connected to the ending piece 3. The intermediate piece 2 includes a first support piece, a first base plate 7, a first connecting piece 4 and a first slot 20. The first support piece is placed on the first base plate 7, and the top end of the first support piece is fixedly connected to the first connecting piece 4, and the corresponding end thereof is provided with a first slot 20.

[0036] The starting member 1 comprises a second support member, a second base plate 10, and a second connector 5. The second support member is placed on the second base plate 10. The second connector 5 is fixedly connected to the top of the end of the second support member where it connects to the intermediate member 2. The second support member comprises a second top plate 9 and two second side plates 11. The second top plate 9 is structurally identical to the first top plate 6, and the connection between the second top plate 9 and the second side plates 11 is similar to the connection between the first top plate 6 and the first side plates 8. The second connector 5 serves as the starting point for assembly and docks with the middle member 2's chute via a slider 25, ensuring rapid alignment of subsequent components.

[0037] The terminating member 3 includes a third support member, a third base plate 13, and a second slot 21. The third support member is placed on the third base plate 13, and a second slot 21 is provided at the top of the end of the third support member connected to the intermediate member 2. The third slot is used for final fixing, forming a closed force system with the intermediate member 2 to balance the prestress distribution. The third support member includes a third top plate 12 and two third side plates 14. The third top plate 12 has the same structure as the first top plate 6, and the third side plates 14 have the same structure as the first side plates 8. The connection method between the third top plate 12 and the third side plates 14 is the same as the connection method between the first top plate 6 and the first side plates 8.

[0038] The outer walls of the first, second, and third support members are all fixedly connected to a waterproof layer 24, to which a structural layer 23 is fixedly attached. The inner walls of the first, second, and third support members are all fixedly connected to an intelligent sensing layer 22. Structural layer 23, made of high-strength fiber-reinforced concrete or carbon fiber-reinforced polymer, enhances the compressive and impact resistance of the support member outer walls, protecting them from external forces such as mechanical impact and ground subsidence during construction and operation. As the first line of defense, waterproof layer 24 directly resists the infiltration of external groundwater and soil moisture, forming an "active + passive" dual waterproofing system alongside the existing waterstop (physical seal). Intelligent sensing layer 22 includes embedded fiber optic sensors, piezoelectric films, or wireless strain gauges to collect real-time data on structural deformation, crack expansion, and internal stress. Interacting with the nanographene-modified epoxy resin, when intelligent sensing layer 22 detects microcracks, it transmits a signal to a controller via conventional structures. The controller automatically triggers an electrical heating system, which heats the resin, activating its fluidity and enabling flow repair.

[0039] The first support member includes a first top plate 6 and two first side plates 8. The first side plates 8 are fixedly connected to both sides of the first top plate 6. The connection between the first top plate 6 and the first side plates 8 is injected with nanographene-modified epoxy resin. The nanographene-modified epoxy resin is configured using existing resins to enhance the crack resistance of the connection, impart self-repairing capabilities, and repair microcracks after electrical heating. The bottom end of the first side plate 8 is placed in the trapezoidal groove of the first bottom plate 7. The shape of the bottom end of the first side plate 8 is adapted to the shape of the trapezoidal groove. The geometric locking improves the connection stability between the side plate and the bottom plate and reduces the risk of displacement. Half of the first connecting member 4 is cast together with the first top plate 6 and the first side plate 8.

[0040] Both ends of the first top plate 6 are stepped, and the top shape of the first side plate 8 matches the shape of the ends of the first top plate 6. A first reserved conduit 15 is provided in the middle of both the first top plate 6 and the first side plate 8. The first reserved conduit 15 is used to insert steel strands to apply prestress, thereby improving the overall compressive and bending resistance of the structure. A connection hole is provided at the bottom end of the first side plate 8, and a chute is provided on the outer wall of the first side plate 8. The ends of the first top plate 6 are fixedly connected to first waterstops 18. There are four first waterstops 18, which are symmetrically installed at the two ends of the first top plate 6. The trapezoidal chute cooperates with the slider 25 to achieve precise assembly, and the four symmetrical waterstops form a multi-layered waterproof barrier.

[0041] The first connector 4 and the second connector 5 have the same structure. A slider 25 is fixedly connected to the first connector 4. Both the slideway and the slider 25 have a trapezoidal structure. The slider 25 is positioned on the inner wall of the first connector 4. A second waterstop 19 is located inside the slider 25 and is fixedly mounted on the inner wall of the first connector 4. The first waterstop 18 (at the top plate end) and the second waterstop 19 (at the inner wall of the connector) form a double waterproofing mechanism, meeting the anti-seepage requirements of underground environments.

[0042] The first, second, and third base plates 7, 10, 13 all have identical structures. Two second reserved conduits 16 and two third reserved conduits 17 are provided on the first base plate 7. The second reserved conduits 16 are parallel to the axial direction of the first support member, while the third reserved conduits 17 are parallel to the radial direction of the first support member. Both the second and third reserved conduits 16, 17 are used to insert steel strands to apply prestress, improving the overall compressive and bending resistance of the structure.

[0043] The present invention also provides a construction method for the above-mentioned intelligent assembled prestressed underground space structure, comprising the following steps:

[0044] Step 1: Construction preparation: Use BIM technology to conduct 3D modeling, optimize component size matching, and obtain the dimensions of each structure;

[0045] Step 2, structural prefabrication: Use concrete to cast each component. After the first top plate 6 and the first side plate 8 are cast, half of the first connecting member 4 is cast together with the first top plate 6 and the first side plate 8 by casting. The second top plate 9 and the second side plate 11 are cast in the same way. The third top plate 12 and the third side plate 14 are cast in concrete respectively, and nano-graphene-modified epoxy resin is injected into the joints between the first top plate 6 and the first side plate 8, the second top plate 9 and the second side plate 11, and the third top plate 12 and the third side plate 14;

[0046] Step 3: Foundation treatment: After excavating the foundation trench, lay the cushion layer and install the guide rail system on the cushion layer;

[0047] Step 4, main structure assembly: hoist the second base plate 10 into place, weld it to the foundation embedded parts, install the second support member, push the bottom of the second side plate 11 into the trapezoidal groove of the second base plate 10, insert the annular steel strand into the first reserved pipe 15, insert the radial steel strand into the third reserved pipe 17, and fix the second side plate 11 to the second base plate 10. Then hoist the middle piece 2. When the middle piece 2 slides toward the starting piece 1, push the first slot 20 toward the slider 25 until the slider 25 is completely inserted into the slide groove, and fix the middle piece 2. Then use the same method to hoist the end piece 3. After hoisting the end piece 3, insert the axial steel strand into the second reserved pipe 16.

[0048] Step 5. Apply prestress: After assembly is completed, the self-repair function of the nano-epoxy resin is activated by electrical heating, and an intelligent tensioning system is used to perform initial and final tensioning. During the prestressing process, a three-dimensional laser scanner is used to detect deformation, and data is collected in real time through the terminal.

[0049] Therefore, the present invention adopts the above-mentioned intelligent assembled prestressed underground space structure and its construction method, by reasonably setting the starting parts, intermediate parts and ending parts, adopting specific connection methods, waterproof measures such as waterproof layers and water stop strips, and inner wall intelligent sensing layers, combined with BIM technology to optimize size, nano-graphene modified epoxy resin to enhance durability, intelligent tensioning system and three-dimensional laser scanner monitoring, it is simple and efficient in assembly, with stable connections, good waterproofness, high degree of intelligence, good durability, and scientific and standardized construction process, which not only shortens the construction period, but also facilitates management and maintenance, and ensures the quality and service life of the structure.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. An intelligent prestressed underground space structure, characterized by: It includes a starting piece, a middle piece and an ending piece. The starting piece is fixedly connected to the middle piece, and the middle piece is fixedly connected to the ending piece. The middle piece includes a first support piece, a first base plate, a first connecting piece and a first slot. The first support piece is placed on the first base plate. One end of the top of the first support piece is fixedly connected to the first connecting piece, and the corresponding end is provided with a first slot.

2. The intelligent prestressed underground space structure according to claim 1, characterized in that: The starting piece includes a second supporting piece, a second bottom plate, and a second connecting piece. The second supporting piece is placed on the second bottom plate, and the top of one end of the second supporting piece connected to the middle piece is fixedly connected to the second connecting piece. The terminating member comprises a third supporting member, a third bottom plate and a second slot. The third supporting member is placed on the third bottom plate. The top of one end of the third supporting member connected to the middle member is provided with a second slot.

3. The intelligent prestressed underground space structure according to claim 2, characterized in that: The outer walls of the first support member, the second support member and the third support member are all fixedly connected with a waterproof layer, the outer side of the waterproof layer is fixedly connected with a structural layer, and the inner walls of the first support member, the second support member and the third support member are all fixedly connected with an intelligent sensing layer.

4. The intelligent prestressed underground space structure according to claim 2, characterized in that: The first supporting member includes a first top plate and two first side plates. The first side plates are fixedly connected on both sides of the first top plate. The connection between the first top plate and the first side plates is injected with nano-graphene modified epoxy resin. The bottom end of the first side plate is placed in the trapezoidal groove of the first bottom plate. The shape of the bottom end of the first side plate is adapted to the shape of the trapezoidal groove. Half of the first connecting member is cast together with the first top plate and the first side plate.

5. The intelligent prestressed underground space structure according to claim 4, characterized in that: Both ends of the first top plate are stepped, and the top shape of the first side plate is adapted to the end shape of the first top plate. A first reserved pipe is provided in the middle of the first top plate and the first side plate, and a connecting hole is provided at the bottom end of the first side plate. A slide groove is provided on the outer wall of the first side plate. The end of the first top plate is fixedly connected to the first water stop strip. There are four first water stop strips, which are symmetrically installed at the two ends of the first top plate.

6. The intelligent prestressed underground space structure according to claim 2, characterized in that: The first connecting member and the second connecting member have the same structure. A slider is fixedly connected to the first connecting member. Both the slide groove and the slider are trapezoidal structures. The slider is placed on the inner wall of the first connecting member. A second water stop strip is provided on the inner side of the slider. The second water stop strip is fixedly installed on the inner wall of the first connecting member.

7. The intelligent prestressed underground space structure according to claim 4, characterized in that: The second support member includes a second top plate and two second side plates. The second top plate has the same structure as the first top plate, and the connection method between the second top plate and the second side plates is the same as the connection method between the first top plate and the first side plates.

8. The intelligent prestressed underground space structure according to claim 2, characterized in that: The third support member includes a third top plate and two third side plates. The third top plate has the same structure as the first top plate, the third side plate has the same structure as the first side plate, and the connection method between the third top plate and the third side plate is the same as the connection method between the first top plate and the first side plate.

9. The intelligent prestressed underground space structure according to claim 2, characterized in that: The first base plate, the second base plate and the third base plate have the same structure. Two second reserved pipes and two third reserved pipes are opened on the first base plate. The second reserved pipes are parallel to the axial direction of the first support member, and the third reserved pipes are parallel to the radial direction of the first support member.

10. A construction method for an intelligent prefabricated underground space structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Construction preparation: Use BIM technology to conduct 3D modeling, optimize component size matching, and obtain the dimensions of each structure; Step 2: Structural prefabrication: Use concrete to cast each component. After the first top plate and the first side plate are cast, half of the first connecting piece is cast together with the first top plate and the first side plate. The second top plate and the second side plate are cast in the same way. The third top plate and the third side plate are cast in concrete respectively. Nanographene-modified epoxy resin is injected into the joints between the first top plate and the first side plate, the second top plate and the second side plate, and the third top plate and the third side plate. Step 3: Foundation treatment: After excavating the foundation trench, lay the cushion layer and install the guide rail system on the cushion layer; Step 4, main structure assembly: hoist the second base plate into place, weld it to the foundation embedded parts, install the second support member, push the bottom of the second side plate into the trapezoidal groove of the second base plate, insert the annular steel strand into the first reserved pipe, insert the radial steel strand into the third reserved pipe, and fix the second side plate to the second base plate. Then hoist the middle piece. When the middle piece slides toward the starting piece, push the first slot toward the slider until the slider is completely inserted into the slide slot, and fix the middle piece. Then use the same method to hoist the end piece. After hoisting the end piece, insert the axial steel strand into the second reserved pipe. Step 5. Apply prestress: After assembly is completed, the self-repair function of the nano-epoxy resin is activated by electrical heating, and an intelligent tensioning system is used to perform initial and final tensioning. During the prestressing process, a three-dimensional laser scanner is used to detect deformation, and data is collected in real time through the terminal.

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