Supporting structure for underground pipeline around foundation pit

Abstract

The utility model discloses a supporting structure for underground pipelines around a foundation pit, and relates to the technical field of constructional engineering. The supporting protection structure comprises a stand column pile, a supporting piece and an anti-vibration piece, and the supporting piece provides supporting for the underground pipeline. The overhead layer structure comprises a foundation, a vertical supporting foundation and a covering layer, an overhead area is formed among the vertical supporting foundation, the covering layer and the slope body, and the underground pipeline is enclosed in the overhead area; the power generation and heating system comprises a photovoltaic power generation system, a constant-temperature heating controller and a heat supply pipe; the slope of the foundation pit is supported in a sloping mode, the manufacturing cost is reduced, the construction period is shortened, pollution to the environment is reduced, underground pipelines are isolated from the outside under vertical steel pipe pile supporting and horizontal structural layer overhead, disturbance of foreign objects and external force and vibration interference are prevented, and the horizontal space obtained after sloping supporting is fully utilized; the heat supply pipe provides heat for a closed space defined by the vertical supporting foundation and the covering layer, and underground pipelines are prevented from being frozen and exposed to be on fire.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to a support structure for underground pipelines around a foundation pit. Background Art

[0002] The complex surrounding environment of the foundation pit is one of the important factors restricting the foundation pit support scheme. This complexity includes the presence of a complex network of underground pipelines around the pit. To avoid disturbing the existing underground pipelines, the traditional foundation pit support approach adopts the principle of avoidance, and the corresponding foundation pit support scheme is vertical support, generally using cast-in-place concrete piles. Strict deformation requirements necessitate the use of anchor cables or internal bracing. This scheme has two drawbacks: firstly, it involves a large amount of support work, high investment costs, and a long construction period; secondly, the concrete pouring or demolition can easily cause environmental pollution, making it neither low-carbon nor environmentally friendly.

[0003] The surrounding environment of the excavation pit has ample space, making slope protection (wire mesh and shotcrete) a viable option. This solution is simple and economical, but the pit's depth leads to significant space waste and a large volume of earthwork. Furthermore, the excavation process will expose some underground pipelines, requiring pre-existing reinforcement and support. The reinforcement and support measures will be determined based on the pipeline's material, purpose, and deformation control requirements. Additionally, the exposed underground pipelines are susceptible to bursting and freezing during the winter months. Traditional methods involve wrapping the pipelines with insulation material, but this material is prone to aging and is flammable, posing a fire hazard. Utility Model Content

[0004] The main purpose of this utility model is to provide a support structure for foundation pits with underground pipelines around them, in order to solve the problems of high investment cost, long construction period and easy environmental pollution caused by traditional support structures for foundation pits with underground pipelines in the surrounding environment.

[0005] To achieve the above objectives, this utility model provides a support structure for an excavation pit with underground pipelines around it, including a power generation and heating system, comprising a photovoltaic power generation system, a constant temperature heating controller, and heating pipes; and further comprising:

[0006] A slope protection structure includes a slope protection layer disposed on a slope; the slope protection layer is provided with mounting grooves;

[0007] The supporting and protective structure includes vertical piles penetrating the slope protection layer and located within the slope body, support members installed on the vertical piles, and shock-absorbing members installed around the underground pipeline; the support members are located at the bottom end of the shock-absorbing members to support the shock-absorbing members, thereby providing support for the underground pipeline;

[0008] The elevated structure includes a foundation at the top of the slope, a vertical support foundation at the bottom of the slope, and a cover layer between the foundation and the vertical support foundation; the vertical support foundation, the cover layer, and the slope form a hollow elevated area to enclose the underground pipeline; the heating pipe is installed in the groove.

[0009] As a further improvement of this utility model, the mounting grooves are arranged longitudinally at intervals on the slope protection layer; the mounting grooves are located in the overhead area; and a heat insulation component is provided between the slope protection layer and the heating pipe.

[0010] As a further improvement of this utility model, the support member includes a lower support connected to the column pile, a jack set on the lower support, and an upper support set on the jack; the bottom end of the upper support is provided with a circular hole groove that is rigidly connected to the upper end of the jack, and the top end of the upper support is provided with an arc-shaped groove that is rigidly connected to the shock absorber.

[0011] As a further improvement of this utility model, the shock-absorbing component includes two sets of outer steel shell plates and an inner steel shell plate disposed inside the outer steel shell plates, with a connecting member between the two sets of outer steel shell plates; the inner steel shell plate is made of soft plastic steel and is in the shape of a two-way "arc". The inner side of the arc of the inner steel shell plate is in rigid contact with the underground pipeline, and the outer side of the arc of the inner steel shell plate is connected to the outer steel plate by a fixing member; the connecting member drives the two sets of outer steel shell plates to move towards each other under the action of external force, so that the inner steel shell plate is in rigid contact with the underground pipeline.

[0012] As a further improvement of this utility model, the vertical support foundation includes steel pipe piles spaced apart at the toe of the slope, shear braces arranged between adjacent steel pipe piles, and a vertical fireproof insulation board; the bottom end of the steel pipe piles is embedded in the stratum at the toe of the slope; the bottom end of the vertical fireproof insulation board abuts against the toe of the slope.

[0013] As a further improvement of this utility model, the covering layer includes a horizontally distributed fireproof insulation board, an isolation layer, a protective layer, a structural layer, and a soil layer, arranged from bottom to top. The left ends of the horizontally distributed fireproof insulation board, isolation layer, protective layer, and structural layer are all provided with coaxial circular holes. The right ends of the horizontally distributed fireproof insulation board, isolation layer, protective layer, and structural layer are anchored to the cap beam. A pre-embedded support is provided on the foundation. An anchor head is provided on the pre-embedded support. The horizontally distributed fireproof insulation board, isolation layer, protective layer, and structural layer are connected to the pre-embedded support through the circular holes at their left ends.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. By reinforcing and supporting underground pipelines with steel structure components and using a slope protection method to support the foundation pit slope, the problems of high investment cost, long construction period and easy environmental pollution of traditional support structures are avoided. At the same time, the characteristics of steel structure materials, such as lightweight, high strength, green environmental protection, recyclability and low cost, are fully utilized. In addition, steel structure has good seismic performance, which can reduce the disturbance of construction vibration to underground pipelines.

[0016] 2. By supporting the vertical steel pipe piles and raising the horizontal structural layer, the underground pipelines supported and reinforced below are isolated from the outside world to prevent disturbance and vibration from external objects and forces. On the other hand, the horizontal space formed by the upper part after the slope support is fully utilized. Attached Figure Description

[0017] Figure 1 A cross-sectional schematic diagram of a support structure system for underground pipelines in the surrounding environment of an excavation pit;

[0018] Figure 2 A top-view schematic diagram of a support structure system for underground pipelines in the surrounding environment of an excavation pit;

[0019] Figure 3 A cross-sectional view of an overhead layer structure in a support structure system for underground pipelines in the surrounding environment of a foundation pit.

[0020] Figure 4 This is a schematic diagram of a seismic isolation component in a support structure system for underground pipelines in the surrounding environment of a foundation pit.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Slope protection layer; 11. Rectangular groove; 2. Support and protection structure; 21. Column pile; 23. Lower support; 24. Jack; 25. Upper support; 26. Seismic isolation component; 261. Outer steel shell plate; 262. Inner steel shell plate; 263. Fixture; 264. Ear plate; 265. Bolt; 3. Elevated floor structure; 301. Cover layer; 302. Vertical support foundation; 31. Steel pipe pile; 32. Crown beam; 33. Scissor bracing; 34. Vertical protection 35. Fireproof insulation board; 36. Horizontal fireproof insulation board; 37. Isolation layer; 38. Protective layer; 39. Structural layer; 30. Plain soil layer; 310. Foundation; 311. Micro anchor pile; 312. Anchor bolt; 313. Embedded parts; 314. Sealed anchor head; 4. Photovoltaic power generation system; 41. Photovoltaic panel array; 42. Steel bracket; 43. Inverter; 44. Control box; 45. Constant temperature heating controller; 46. Heating pipe; 5. Underground pipeline. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] In one embodiment, see Figure 1 The present invention relates to a support structure for an underground pipeline around a foundation pit, comprising a slope, a slope protection structure, a support and protection structure 2, an elevated layer structure 3, and a power generation and heating system.

[0025] The slope protection structure includes a slope protection layer 1 installed on the slope, with an installation groove on the slope protection layer 1; the support protection structure 2 includes a column pile 21 penetrating the slope protection layer 1 and located within the slope, a support member installed on the column pile 21, and a shock absorber 26 installed around the underground pipeline 5, with the support member located at the bottom of the shock absorber 26 to support the shock absorber 26, thereby providing support for the underground pipeline 5; the elevated structure 3 includes a foundation 310 installed at the top of the slope, a vertical support foundation 302 installed at the bottom of the slope, and a cover layer 301 installed between the foundation 310 and the vertical support foundation 302, forming a hollow elevated area between the vertical support foundation 302, the cover layer 301, and the slope to enclose the underground pipeline 5; the power generation and heating system includes a photovoltaic power generation system 4, a constant temperature heating controller 45, and a heating pipe 46 installed in the installation groove.

[0026] Further, see Figure 2 The installation grooves are set longitudinally at intervals on the slope protection layer 1, and the installation grooves are located in the overhead area; a heat insulation component is installed between the slope protection layer 1 and the heating pipe 46.

[0027] Preferably, the slope protection layer 1 covers the exposed slope surface of the excavated slope. The slope protection layer 1 is a 100mm thick reinforced concrete structure. In addition to structural bars with a diameter of 8mm parallel to the slope in both the horizontal and vertical directions, there are also reinforcing bars with a diameter of 16mm at diagonal angles of 45° and 135°. A heat insulation component is installed between the slope protection layer 1 and the heating pipe 46. The heat insulation component is made of rock wool board to prevent the slope protection layer 1 from thermally expanding.

[0028] Preferably, both the photovoltaic power generation system 4 and the constant temperature heating control device are mature systems in the prior art. The photovoltaic power generation system 4 mainly includes a steel bracket 42, a photovoltaic panel array 41, an inverter 43, and a control box 44. The bottom end of the steel bracket 42 is fixed to the cover layer 301 with the pre-embedded part 313 installed, and the top end supports the photovoltaic panel array 41. The photovoltaic panel array 41 is connected in series with the inverter 43, the control box 44, the constant temperature heating control device, and the heating pipe 46. The photovoltaic power generation system connects the heating device and the heating pipe 46 to provide heat to the underground pipe 5 and prevent the underground pipe 5 from freezing and cracking.

[0029] Further, see Figure 1 , 2 The support includes a lower support 23 connected to the column pile 21, a jack 24 set on the lower support 23, and an upper support 25 set on the jack 24. The bottom end of the upper support 25 is provided with a round hole groove that is rigidly connected to the upper end of the jack 24, and the top end of the upper support 25 is provided with an arc-shaped groove that is rigidly connected to the shock absorber 26.

[0030] Preferably, two sets of column piles 21 are arranged at intervals. The bottom ends of the two sets of column piles 21 are respectively embedded in the stratum below the slope protection layer 1 near the slope toe and slope top, and the upper ends are symmetrically distributed and connected to the bottom end of the lower support 23.

[0031] Preferably, the jack 24 is located between the upper support 25 and the lower support 23. The lower end of the jack 24 is fixed to the top center of the lower support 23 by bolts 265, and the upper end is in rigid contact with the circular hole groove opened at the bottom center of the upper support 25.

[0032] In the above setup, the column pile 21 is fixedly connected to the slope and provides a supporting foundation for the jack 24. An arc-shaped groove is provided at the center of the top of the upper support 25 to limit the lateral displacement of the upper shock absorber 26 and ensure rigid contact with the upper support 25. The jack 24 can drive the upper support 25 to move, thereby adjusting the position of the upper support 25 to abut against the shock absorber 26, thus suspending the underground pipeline 5 below.

[0033] Further, see Figure 4 The shock-absorbing component 26 includes two sets of outer steel shell plates 261 and an inner steel shell plate 262 disposed inside the outer steel shell plate 261. A connector is provided between the two sets of outer steel shell plates 261. The inner steel shell plate 262 is made of soft plastic steel and is in the shape of a two-way arc. The inner side of the arc of the inner steel shell plate 262 is in rigid contact with the underground pipeline 5, and a fixing member 263 is provided between the outer side of the arc of the inner steel shell plate 262 and the outer steel plate. Under the action of external force, the connector drives the two sets of outer steel shell plates 261 to move towards each other so that the inner steel shell plate 262 is in rigid contact with the underground pipeline 5.

[0034] Preferably, the outer steel shell plate 261 is formed by splitting a hollow cylindrical steel tube with openings at both ends into two parts from the center. The outer steel shell plate 261 is provided with ear plates 264, and the ear plates 264 are provided with screw holes.

[0035] Preferably, the connector includes a stud, a nut, and a washer. The stud passes through a screw hole and connects with the nut, thereby connecting the two sets of outer steel shell plates 261 to form a cylindrical shape that wraps around the underground pipe 5, and causing the inner steel shell plate 262 to abut against the underground pipe 5.

[0036] Preferably, the fastener 263 is a fixing screw, which passes through the outer steel shell plate 261 and connects to the inner steel shell plate 262.

[0037] In the above configuration, two sets of outer steel shell plates 261 are connected to the outer periphery of the suspended part of the underground pipeline 5 through connectors, so that the inner steel shell plate 262 abuts against the outer wall of the underground pipeline 5. The outer steel shell plate 261 is rigidly connected to the upper support 25 and connected to the ground through jacks 24 and column piles 21, thereby providing support for the underground pipeline 5. The inner steel shell plate 262 is a two-way "arc" shape, which can absorb the force transmitted to the underground pipeline 5 from the outside, thereby providing seismic resistance for the underground pipeline 5.

[0038] Further, see Figure 1 , 2 The vertical support foundation 302 includes steel pipe piles 31 spaced apart at the toe of the slope, shear braces and vertical fireproof insulation boards 34 arranged between adjacent steel pipe piles 31. The bottom ends of the steel pipe piles 31 are embedded in the stratum at the toe of the slope, and the bottom ends of the vertical fireproof insulation boards 34 abut against the toe of the slope.

[0039] Preferably, the upper end of the steel pipe pile 31 is anchored to the capping beam 32; the scissor brace 33 is connected to the steel pipe pile 31 by welding.

[0040] Preferably, the steel pipe piles 31 are arranged intermittently in the transverse direction along the toe of the slope, and their embedment depth must meet the settlement requirements under the action of the upper vertical load and the displacement requirements under the action of the horizontal load.

[0041] Preferably, the vertical fireproof insulation board 34 is located on the inner side of the steel pipe pile 31 facing the slope, and the two are fixed by nails. The vertical fireproof insulation board 34 is arranged vertically along the toe of the slope.

[0042] Preferably, the capping beam 32 and the foundation 310 are reinforced concrete structures. The width of the capping beam 32 should be greater than the diameter of the steel pipe pile 31, and both sides should be greater than 100mm. The thickness and width of the foundation 310 should not be less than 600mm.

[0043] Further, see Figure 3The cover layer 301 includes a horizontally distributed fireproof insulation board 35, an isolation layer 36, a protective layer 37, a structural layer 38, and a plain soil layer 39, arranged from bottom to top. The left ends of the horizontal fireproof insulation board 35, the isolation layer 36, the protective layer 37, and the structural layer 38 are all provided with coaxial circular holes. The right ends of the horizontal fireproof insulation board 35, the isolation layer 36, the protective layer 37, and the structural layer 38 are anchored to the cap beam 32. The foundation 310 is provided with embedded support components, and the embedded support components are provided with sealing anchor heads 314. The horizontal fireproof insulation board 35, the isolation layer 36, the protective layer 37, and the structural layer 38 are connected to the embedded support components through the circular holes at their left ends.

[0044] Preferably, the foundation 310 is L-shaped, the pre-embedded support is installed at the flat end of the foundation 310, a micro anchor pile 311 is provided at the center of the bottom end of the foundation 310, and an anchor bolt 312 is provided on the lower back side.

[0045] Preferably, the micro anchor piles 311 and the anchor bolts 312 are made of grade III steel with a diameter of 16mm, and the anchoring ends are bent into hooks inside reinforced concrete, with the hook length being no less than 35 times the diameter.

[0046] Preferably, the column pile 21 (steel pipe), steel pipe pile 31, upper support 25 (steel structure component), lower support 23 (steel structure component), structural layer 38 (steel plate) and steel bracket 42 are all coated with anti-corrosion paint to prevent rusting.

[0047] Preferably, the thickness of the vertical fireproof insulation board 34 and the horizontal fireproof insulation board 35 is not less than 300mm, the thickness of the isolation layer 36 and the protective layer 37 is not less than 100mm, the isolation layer 36 is made of polyester non-woven fabric, the protective layer 37 is made of gypsum board, the structural layer 38 (steel plate) is not less than 400mm, the thickness of the plain soil layer 39 is not less than 500mm, and it has a 3% slope towards the outside of the foundation pit to prevent rainwater from flowing into the foundation pit.

[0048] In the above setup, the foundation 310 is securely connected to the slope via micro anchor piles 311 and anchor bolts 312. After the vertical support foundation 302 is installed, the horizontal fireproof insulation board 35, isolation layer 36, protective layer 37, and structural layer 38 are laid layer by layer. The right ends of the horizontal fireproof insulation board 35, isolation layer 36, protective layer 37, and structural layer 38 are anchored to the cap beam 32, and the left ends are respectively threaded through round holes onto the embedded support and fixed by the sealing anchor head 314. The bottom end of the steel bracket 42 is fixed to the structural layer 38 on which the embedded part 313 is installed.

[0049] In this embodiment, the slope of the foundation pit is supported by a slope protection method. During the slope protection process, the underground pipeline 5 is exposed. A slope protection layer 1 is poured on the slope surface; a foundation 310 is poured on the top of the slope; steel pipe piles 31 are installed in the underground soil layer at the toe of the slope, and shear bracing and capping beams 32 are constructed on the steel pipe piles 31 to form a whole. Vertical fireproof and heat-insulating boards 34 are installed on the steel pipe piles 31 in the direction adjacent to the slope. Finally, a cover layer 301 is constructed, and a power generation and heating system is installed above the cover layer 301. The exposed underground pipeline 5 is covered internally and supported by the support and protection structure 2. At the same time, the underground pipeline 5 is provided with shock-absorbing measures by the shock-absorbing component 26. The slope of the foundation pit is supported by the slope method, which avoids the problems of high investment cost, long construction period and easy environmental pollution of traditional support structures. At the same time, it fully utilizes the characteristics of steel structure material, which is lightweight, high strength, green and environmentally friendly, recyclable and inexpensive. In addition, the steel structure has good seismic performance, which can reduce the disturbance of construction vibration on the underground pipeline 5.

[0050] By using vertical steel pipe piles 31 for support and horizontal overhead structure 3, the underground pipeline 5, which is supported and reinforced below, is isolated from the outside world to prevent disturbance and vibration from external objects and forces. On the other hand, it makes full use of the horizontal space formed by the overhead structure after slope protection.

[0051] By installing photovoltaic panels on the upper part of the elevated structure 3, solar power is used to generate heat and connect to heating pipes 46 to provide heat to the enclosed space below the elevated structure, which is enclosed by vertical fireproof insulation boards 34 and horizontal fireproof insulation boards, preventing the underground pipes 5 from freezing. It utilizes clean and efficient solar energy, is green and pollution-free, achieves self-generation and self-consumption, and eliminates the burden of electricity consumption during peak periods.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A supporting structure for underground pipelines around a foundation pit, comprising a power generation and heating system, wherein the power generation and heating system comprises a photovoltaic power generation system (4), a constant temperature heating controller (45) and a heating pipe (46); characterized in that: include: A slope protection structure comprises a slope protection layer (1) arranged on a slope; the slope protection layer (1) is provided with a mounting groove; A supporting protection structure (2) comprises a column pile (21) penetrating the slope protection layer (1) and located inside the slope, a support member arranged on the column pile (21), and a shockproof member (26) arranged outside the underground pipeline (5); the support member is located at the bottom end of the shockproof member (26) to support the shockproof member (26), thereby providing support for the underground pipeline (5); The overhead structure (3) comprises a foundation (310) arranged at the top of the slope, a vertical support foundation (302) arranged at the foot of the slope, and a covering layer (301) arranged between the foundation (310) and the vertical support foundation (302); a hollow overhead area is formed between the vertical support foundation (302), the covering layer (301), and the slope body to enclose an underground pipeline (5); and the heating pipe (46) is installed in the groove.

2. The supporting structure for underground pipelines around a foundation pit according to claim 1, characterized in that: The installation grooves are arranged on the slope protection layer (1) at intervals along the longitudinal direction; the installation grooves are located in the overhead area; and a heat insulating member is arranged between the slope protection layer (1) and the heating pipe (46).

3. The supporting structure for underground pipelines around a foundation pit according to claim 2, characterized in that: The support member comprises a lower support (23) connected to the column pile (21), a jack (24) arranged on the lower support (23), and an upper support (25) arranged on the jack (24); a circular hole groove is provided at the bottom end of the upper support (25) and is rigidly connected to the upper end of the jack (24); and a circular arc groove is provided at the top end of the upper support (25) and is rigidly connected to the shockproof member (26).

4. The supporting structure for underground pipelines around a foundation pit according to claim 3, characterized in that: The shockproof component (26) comprises two groups of outer steel shell plates (261) and inner steel shell plates (262) arranged inside the outer steel shell plates (261); a connecting piece is arranged between the two groups of outer steel shell plates (261); the inner steel shell plates (262) are made of soft plastic steel and are in a bidirectional "circular arc" shape; the inner side of the circular arc of the inner steel shell plates (262) is in rigid contact with the underground pipeline (5); a fixing piece (263) is arranged between the outer side of the circular arc of the inner steel shell plates (262) and the outer steel plates; the connecting piece drives the two groups of outer steel shell plates (261) to move toward each other under the action of an external force, so that the inner steel shell plates (262) are in rigid contact with the underground pipeline (5).

5. The supporting structure for underground pipelines around a foundation pit according to claim 4, characterized in that: The vertical support foundation (302) comprises steel pipe piles (31) arranged at intervals at the foot of the slope, shear braces arranged between adjacent steel pipe piles (31), and a vertical fireproof insulation board (34); the bottom ends of the steel pipe piles (31) are embedded in the stratum at the foot of the slope; the bottom ends of the vertical fireproof insulation board (34) are in contact with the foot of the slope.

6. A supporting structure for underground pipelines around a foundation pit according to claim 5, characterized in that: The covering layer (301) includes a horizontal fireproof insulation board (35), an isolation layer (36), a protective layer (37), a structural layer (38) and a plain soil layer (39) which are distributed from bottom to top. The left ends of the horizontal fireproof insulation board (35), the isolation layer (36), the protective layer (37) and the structural layer (38) are all provided with coaxial circular holes. The right ends of the horizontal fireproof insulation board (35), the isolation layer (36), the protective layer (37) and the structural layer (38) are anchored and connected to the crown beam (32); the foundation (310) is provided with an embedded support member; the embedded support member is provided with an anchor head (314); the horizontal fireproof insulation board (35), the isolation layer (36), the protective layer (37) and the structural layer (38) are connected to the embedded support member through the circular hole at the left end.

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