Green construction structure of underground small-space pile wall

Abstract

The utility model belongs to the technical field of building underground structures, and particularly relates to an underground small-space piling wall green building structure which comprises supporting piles, an underground structure outer wall and a formwork, a top beam is arranged at the upper ends of the supporting piles, the supporting piles are connected with all layers of waist beams, and a waterproof heat preservation layer is arranged between the supporting piles and the underground structure outer wall. A foundation bottom plate is arranged at the lower end of the underground structure outer wall, a plurality of layers of cast-in-place floor slabs are arranged above the foundation bottom plate, a formwork is arranged on the inner side line of each layer of the underground structure outer wall, and a single-side reinforcing assembly is arranged on one side of each formwork. The waterproof heat preservation layer is arranged between the supporting piles and the underground structure outer wall, moisture in underground water and soil is effectively isolated, heat transfer is reduced, the heat preservation performance of a building is improved, meanwhile, direct contact between structural materials and the underground water and the soil is reduced, and corrosion and aging are reduced; the supporting piles and the structural outer wall are combined, the foundation bearing capacity of a building is enhanced, and the overall stability of the structure is improved.

Description

Technical Field

[0001] This utility model belongs to the field of underground building structure technology, specifically relating to a green construction structure for pile walls in small underground spaces. Background Technology

[0002] In underground structural construction and foundation pit support engineering, a series of temporary support, reinforcement, protection, and groundwater management measures are often adopted to ensure safety and stability. In some projects adjacent to rivers or municipal roads, due to strict restrictions such as planning red lines, foundation pit support piles must be arranged close to the planning boundary, resulting in extremely limited construction space. Especially in the construction of underground parking garages, the exterior walls often need to be constructed directly adjacent to the support piles, making exterior wall construction and formwork construction difficult. At the same time, the setting of the support beams also hinders the construction of the garage exterior walls. In this case, the distance between the underground structure exterior wall and the support piles is too close, making it impossible to open effective space on the outside of the exterior wall for waterproofing and insulation work, thus leading to leakage risks and condensation problems caused by thermal bridging, posing a serious threat to the structural durability and performance. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a green construction structure for pile walls in underground small spaces, thereby improving the thermal insulation performance and structural stability of underground small space buildings.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a green construction structure for underground small space pile walls, including support piles, underground structural exterior walls and formwork, a cap beam is set at the upper end of the support piles, the support piles are connected to the waist beams of each layer, a waterproof and heat-insulating layer is set between the support piles and the underground structural exterior walls, the lower end of the underground structural exterior walls is a foundation slab, several layers of cast-in-place floor slabs are set above the foundation slab, formwork is set on the inner edge of each layer of underground structural exterior walls, and a single-sided reinforcement component is set on one side of the formwork.

[0005] Preferably, the waterproof and thermal insulation layer is a polyurethane waterproof and thermal insulation foam layer.

[0006] Preferably, a waterproof membrane is installed on the top layer of the outer wall of the underground structure. The waterproof membrane is also installed on the upper side of the support piles and the underground soil layer. A waterproof and heat-insulating layer is installed outside the waterproof membrane on the outer side of the outer wall of the underground structure.

[0007] Preferably, water-stop steel plates are installed in the segmented areas of the underground structure's exterior wall.

[0008] Preferably, a back rib is provided on the side of the template, and a single-sided reinforcement component is supported and connected to the back rib.

[0009] Preferably, the single-sided reinforcement component includes a vertical I-beam and a horizontal I-beam. The vertical I-beam is set on one side of the formwork, and the horizontal I-beam is fixedly connected to the reinforcing bars of the foundation slab or cast-in-place floor slab. An inclined bracing I-beam is set between the vertical I-beam and the horizontal I-beam.

[0010] Preferably, the horizontal I-beam is fixedly connected to the reinforcing steel of the foundation slab or cast-in-place floor slab by pre-embedded diagonal bracing steel and reserved bolts.

[0011] Compared with existing technologies, the above technical solution has the following beneficial effects:

[0012] 1. This utility model incorporates a waterproof and thermal insulation layer between the support piles and the outer wall of the underground structure. This effectively isolates groundwater and moisture in the soil, reduces heat transfer, and improves the building's thermal insulation performance. The waterproof and thermal insulation layer reduces heat loss, thereby lowering energy consumption for heating and cooling, contributing to energy conservation and emission reduction. The excellent thermal insulation performance makes the indoor temperature more stable, improving the comfort of living and use. At the same time, it reduces direct contact between structural materials and groundwater and soil, reducing corrosion and aging, and extending the building's service life. Combining the support piles and the outer wall of the structure enhances the building's foundation bearing capacity and improves the overall stability of the structure.

[0013] 2. Waterproof and thermal insulation layers and underground structure exterior wall formwork can be quickly relocated for construction, improving construction efficiency, shortening the construction period, and are suitable for various geological conditions and engineering needs, with strong adaptability. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the present invention.

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0016] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0017] Figure 4 This is a plan view of the present invention.

[0018] Figure 5 This is a schematic diagram of the single-sided reinforcement component in this utility model.

[0019] Among them: 1. Crown beam 2. Waist beam 3. Water-stop steel plate 4. Waterproof and heat-insulating layer 5. Underground structure exterior wall 6. Fixing bolts 7. Support piles 8. Underground soil layer 9. Foundation slab 10. Reinforcing steel 11. Waterproof membrane 12. Embedded diagonal bracing steel 13. Reserved bolts 14. Single-sided reinforcement component 15. Back rib 16. Formwork 17. Cast-in-place floor slab 18. Vertical I-beam 19. Horizontal I-beam 20. Diagonal bracing I-beam. Detailed Implementation

[0020] Figures 1-5 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-5 The present invention will be further described below.

[0021] like Figures 1-3 As shown, this utility model discloses a green construction structure for underground small space pile walls, including support piles 7, underground structural exterior walls 5, and formwork 16. A cap beam 1 is provided at the upper end of the support piles 7. The support piles 7 and the waist beams 2 of each layer are connected by prefabricated components. A waterproof and heat-insulating layer 4 is provided between the support piles 7 and the underground structural exterior walls 5. The waterproof and heat-insulating layer 4 prevents the underground structural exterior walls 5 from direct contact with groundwater and underground soil layers 8, reduces corrosion and aging, and extends the service life of the building. The waterproof and heat-insulating layer 4 also reduces the heat loss of the building, thereby reducing the energy consumption for heating and cooling, which helps to save energy and reduce emissions. The combination of support piles 7 and underground structural exterior walls 5 enhances the foundation bearing capacity of the building and improves the overall stability of the structure. The lower end of the underground structural exterior walls 5 is a foundation slab 9. Several layers of cast-in-place floor slabs 17 are provided above the foundation slab 9. Before pouring, formwork 16 is set along the edge of each layer of underground structural exterior walls 5. To fix the formwork 16, a single-sided reinforcement component 14 is provided on one side of the formwork 16.

[0022] In this embodiment, the waterproof and thermal insulation layer 4 is a polyurethane waterproof and thermal insulation foam layer. Based on the designed thickness of the waterproof and thermal insulation layer 4, the outer wall of the underground structure 5, and the polyurethane waterproof foam mix ratio, the polyurethane waterproof and thermal insulation foam layer is sprayed on the outside of the support pile 7 to form the waterproof and thermal insulation layer 4.

[0023] like Figure 4 As shown, a number of support piles 7 are arranged at intervals, and a number of single-sided reinforcement components 14 are arranged at intervals on one side of the template 16. When installing the single-sided reinforcement components 14, a back rib 15 is set on the side of the template 16, and the single-sided reinforcement components 14 are supported and connected to the back rib 15.

[0024] like Figure 5As shown, the single-sided reinforcement component 14 includes a vertical I-beam 18 and a horizontal I-beam 19. The vertical I-beam 18 is fixedly connected to the back rib 15, and the horizontal I-beam 19 is fixedly connected to the foundation slab 9 or the cast-in-place floor slab 17. An inclined bracing I-beam 20 is provided between the vertical I-beam 18 and the horizontal I-beam 19. The two ends of the inclined bracing I-beam 20 are respectively connected to the vertical I-beam 18 and the horizontal I-beam 19 by fixing bolts 6, thereby supporting the vertical I-beam 18 and the horizontal I-beam 19. Specifically, after the reinforcing bars 10 of the cast-in-place floor slab 17 or foundation slab 9 are tied, diagonal bracing steel 12 is pre-embedded at the corresponding position of the cast-in-place floor slab 17 or foundation slab 9 to limit the displacement of the horizontal I-beam 19. Bolts are reserved on the side of the diagonal bracing steel. When the horizontal I-beam 19 is installed, it is fixed and positioned by the pre-embedded diagonal bracing steel 12 and the reserved bolts 13.

[0025] A waterproof membrane 11 is installed on the top layer of the underground structure exterior wall 5. The waterproof membrane 11 is also installed on the upper side of the support piles 7 and the underground soil layer 8 to form a horizontal waterproof layer. A waterproof and thermal insulation layer 4 is also installed outside the waterproof membrane 11 on the outside of the underground structure exterior wall 5 to prevent thermal bridging. Water-stop steel plates 3 are installed in the segmented areas of the underground structure exterior wall 5 to enhance the waterproof performance of the building during segmented construction and prevent groundwater from seeping into the building interior through the construction joints.

[0026] The construction method for building the above-mentioned structure includes the following steps:

[0027] S1. Based on the structural and architectural drawings, and in conjunction with the dimensions of the foundation slab 9, the underground structure exterior wall 5, and the support piles 7, determine the dimensions of the formwork 16 and the single-sided reinforcement component 14.

[0028] S2. Tie the reinforcing bars 10 of the foundation slab 9 and the cast-in-place floor slab 17. After tying, embed the pre-embedded diagonal bracing steel 12 and the reserved bolts 13.

[0029] S3. Remove the lintel 2 at the construction floor, seal the support holes and reinforce the waterproofing, and spray an overall waterproof and heat-insulating layer 4 on the outside of the support pile 7 and the side of the support structure.

[0030] S4. Reinforcing bars 10 of the outer wall 5 of the underground structure are provided with reinforcing bars 10 to control the positional relationship between the reinforcing bars 10 and the formwork 16, and to prevent the protective layer of the inner reinforcing bars 10 from disappearing during reinforcement. In this embodiment, the reinforcing bars are made of HRB400 steel bars with a diameter of 16mm and a spacing of 1000mm. Water-stop steel plates 3 are set in the segmented areas of the outer wall 5 of the underground structure.

[0031] S5. The template 16 is hoisted into place accurately, ensuring that the inner line of the template matches the edge line of the structural wall when it is placed in place in one go. To prevent the template 16 from falling, it must be fixed with temporary diagonal bracing, and each template 16 must be coated with an appropriate amount of release agent. After the template 16 is assembled, the back rib 15 is installed and reinforced with a temporary support frame.

[0032] After S6 and back rib 15 are reinforced, hoist the single-sided reinforcement component 14, align the tail of the horizontal I-beam 19 with the pre-embedded diagonal brace 12, and fix the horizontal I-beam 19 with the reserved bolts 13. At the same time, fix the back rib 15 on the template 16 with the vertical I-beam 18, and install the single-sided reinforcement component 14 one by one at a certain interval to reinforce the template 16.

[0033] S7. After the template 16, back rib 15 and single-sided reinforcement component 14 are installed, check the axial displacement, flatness and verticality to ensure that they meet the requirements, and adjust and tighten the single-sided reinforcement component 14 and template 16 according to the actual measurement results.

[0034] S8. Concrete pouring: Concrete pouring is carried out in layers, and each layer should not exceed 1m. The upper layer of concrete should be poured before the lower layer of concrete sets. The free fall height of the concrete is reduced by using a pump hose to control the lateral pressure of the concrete pouring on the formwork 16. Once the concrete strength of the underground structure outer wall 5 reaches a certain level, the single-sided reinforcement component 14 can be removed.

[0035] S9. When construction reaches the top floor of the underground structure exterior wall 5, reinforce the construction of the waterproof membrane 11 on the upper part, and spray the waterproof and heat-insulating layer 4 on the outside.

[0036] This invention incorporates a waterproof and thermal insulation layer 4 between the support piles 7 and the underground structure exterior wall 5. This effectively isolates the building from groundwater and moisture in the soil, reduces heat transfer, and improves the building's thermal insulation performance. The waterproof and thermal insulation layer 4 reduces heat loss, thereby lowering energy consumption for heating and cooling, contributing to energy conservation and emission reduction. The excellent thermal insulation performance makes the indoor temperature more stable, improving living and usage comfort. Simultaneously, it reduces direct contact between structural materials and groundwater and soil, reducing corrosion and aging, and extending the building's service life. Combining the construction of the support piles 7 and the underground structure exterior wall 5 integrates their functions, making it part of the building's underground structure. This enhances the building's foundation bearing capacity and improves the overall structural stability. The waterproof and thermal insulation layer 4, placed around or inside the underground structure exterior wall 5 and support piles 7, reduces heat conduction and improves insulation, forming a composite structure that provides both support and excellent thermal insulation. This reduces the building's overall energy consumption, achieving energy conservation and emission reduction. Furthermore, it effectively solves the waterproofing and insulation problems of underground structures in areas with abundant groundwater, effectively protecting the underground structure from erosion and extending the building's service life.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A green construction structure of underground small space pile wall, characterized in that: It includes support pile (7), underground structure outer wall (5) and formwork (16), the crown beam (1) is arranged at the upper end of the support pile (7), the support pile (7) is connected with each layer waist beam (2), the waterproof heat preservation layer (4) is arranged between the support pile (7) and the underground structure outer wall (5), the lower end of the underground structure outer wall (5) is the base plate (9), a plurality of layers of cast-in-place floor (17) are arranged above the base plate (9), the formwork (16) is arranged at the inner edge line of each layer of underground structure outer wall (5), the single-side reinforcing assembly (14) is arranged at one side of the formwork (16).

2. The underground small-space pile wall green construction structure according to claim 1, characterized in that: The waterproof heat preservation layer (4) is a polyurethane waterproof heat preservation foaming layer.

3. The underground small-space pile wall green construction structure according to claim 1, characterized in that: The waterproof coiled material (11) is arranged on the top of the underground structure outer wall (5) and the upper side of the support pile (7) and the underground soil layer (8), and the waterproof coiled material (11) outside the underground structure outer wall (5) is provided with the waterproof heat preservation layer (4).

4. The underground small-space pile wall green construction structure according to claim 1, characterized in that: The water stop steel plate (3) is arranged in the segmented area of the underground structure outer wall (5).

5. The underground small-space pile wall green construction structure according to claim 1, characterized in that: The back arris (15) is arranged at the side of the formwork (16), and the single-side reinforcing assembly (14) is supported and connected on the back arris (15).

6. The underground small-space pile wall green construction structure according to claim 1, characterized in that: The single-side reinforcing assembly (14) includes the vertical I-beam (18) and the horizontal I-beam (19), the vertical I-beam (18) is arranged at one side of the formwork (16), the horizontal I-beam (19) is fixedly connected on the steel bar (10) of the base plate (9) or the cast-in-place floor (17), and the inclined I-beam (20) is arranged between the vertical I-beam (18) and the horizontal I-beam (19).

7. The underground small-space pile wall green construction structure according to claim 6, characterized in that: The horizontal I-beam (19) is fixedly connected on the steel bar (10) of the base plate (9) or the cast-in-place floor (17) through the pre-buried inclined steel (12) and the reserved bolt (13).

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