Metro construction inclined shaft energy structure and construction method

Abstract

The invention discloses a metro construction inclined shaft energy structure and a construction method, and belongs to the technical field of energy equipment, the metro construction inclined shaft energy structure comprises a heat exchanger module and an inclined shaft backfill, the heat exchanger module is arranged on the wall surface of a metro construction inclined shaft and is connected with a heat exchange system arranged in the metro construction inclined shaft, and the metro construction inclined shaft is filled with the inclined shaft backfill. According to the metro construction inclined shaft energy structure and the construction method, the metro construction inclined shaft structure is combined with the heat exchanger, the discarded metro construction inclined shaft which should be backfilled after construction is completed is subjected to secondary utilization, and the metro construction inclined shaft is combined with the heat exchanger module with excellent heat exchange performance, so that the metro construction inclined shaft energy structure becomes a novel underground energy structure; the initial investment cost can be remarkably reduced, the resource utilization rate can be increased, and the purposes of energy conservation and environmental protection can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy equipment, and in particular to an energy structure and a construction method for an inclined shaft of a subway construction. Background Art

[0002] During the construction of the subway, inclined shafts are usually excavated for the transportation of equipment, personnel and materials, as well as for ventilation. However, after the subway is built, in order to restore the original appearance of the surface, the inclined shafts excavated during the construction process are usually backfilled to prevent surface subsidence and other potential safety hazards while ensuring the safety of the tunnel structure.

[0003] Shallow geothermal energy has attracted widespread attention from the industry because of its relatively stable temperature, not easily affected by seasonal changes, and its advantages of high efficiency, sustainability, and environmental protection. Through ground source heat pump technology, shallow geothermal energy can be extracted using buried pipe heat exchangers to achieve efficient, energy-saving, and environmentally friendly heating and cooling for buildings. However, the traditional method of burying buried pipe heat exchangers often involves extremely high drilling and installation fees.

[0004] The inventors found that after the subway was built, the inclined shafts dug during the construction process needed to be backfilled and no longer used. The inclined shafts had a single purpose and the backfilling process wasted a lot of manpower and material resources. At the same time, the current use of shallow geothermal energy requires drilling holes in the construction site and installing buried pipe heat exchangers. This method also has the problem of high drilling and installation costs. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides an energy structure and construction method for an inclined shaft for subway construction. Before the inclined shaft for subway construction is backfilled, a heat exchanger is installed in the inclined shaft. After backfilling, it is used as a tool for shallow geothermal energy extraction. The existing inclined shaft is used to install the geothermal heat exchanger, which can save the cost of separate excavation, drilling or pipe laying, and greatly reduce the initial investment. In addition, the above method can improve the space utilization rate of the inclined shaft. The inclined shaft is usually no longer used after backfilling. By installing a geothermal heat exchanger, the secondary utilization of resources is achieved. Moreover, as a renewable energy source, shallow geothermal energy can reduce dependence on fossil fuels, reduce greenhouse gas emissions, and meet the requirements of sustainable development.

[0006] The technical solution of the present invention is as follows:

[0007] In a first aspect of the present invention, a subway construction inclined shaft energy structure is provided, comprising a heat exchanger module and an inclined shaft backfill, wherein the heat exchanger module is arranged on the wall surface of the subway construction inclined shaft and connected to a heat exchange system arranged in the subway construction inclined shaft, and the inclined shaft backfill is filled in the subway construction inclined shaft;

[0008] The heat exchanger module includes a steel cage and a heat exchange pipe, a water supply pipe and a return pipe installed on the steel cage, the water supply pipe and the return pipe are connected by the heat exchange pipe; the water supply pipe and the return pipe are arranged in an S shape along the vertical cross-section direction of the steel cage, and the heat exchange pipe is installed axially along the subway construction inclined shaft; the steel cage is arranged on the side wall of the subway construction inclined shaft.

[0009] In some embodiments of the present invention, protective materials are sprayed on the outside of the steel cage and the heat exchange tubes, water supply pipes and return pipes installed on the steel cage, and valves, pressure gauges and thermometers are installed at the ends of the water supply pipes and return pipes;

[0010] The inclined shaft backfill includes plain concrete and crushed stone soil, the plain concrete is filled in the upper part of the subway construction inclined shaft, and the crushed stone soil is filled in the lower part of the subway construction inclined shaft.

[0011] In some embodiments of the present invention, the heat exchange system includes a water supply main pipe and a return main pipe arranged in grooves on both sides of the bottom of the subway construction inclined shaft; the water supply pipe and the return pipe are respectively connected to the water supply main pipe and the return main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft.

[0012] In a second aspect of the present invention, a construction method for an inclined shaft energy structure for subway construction is provided, comprising:

[0013] Step 1: Set up a steel cage according to actual conditions and install heat exchange pipes, water supply pipes and return pipes on the steel cage, wherein the heat exchange pipes are connected through the water supply pipes and the return pipes, and the water supply pipes and the return pipes are arranged in an S shape along the vertical cross-section direction of the steel cage;

[0014] Step 2: Fix the steel cage on the side wall of the subway construction inclined shaft, test whether the heat exchange pipe is leaking, and if it is not leaking, connect the water supply pipe and the return pipe to the water supply main pipe and the return main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft;

[0015] Step 3: Fill the steel cage and the outside of the heat exchange tube with protective materials;

[0016] Step 4: backfill the subway construction inclined shaft. Specifically, use plain concrete to fill the upper part of the subway construction inclined shaft, and use crushed stone soil to fill the lower part of the subway construction inclined shaft.

[0017] In a third aspect of the present invention, there is provided a subway construction inclined shaft energy structure, comprising a heat exchanger module and an inclined shaft backfill, wherein the heat exchanger module is arranged on the wall surface of the subway construction inclined shaft and connected to a heat exchange system arranged in the subway construction inclined shaft, and the inclined shaft backfill is filled in the subway construction inclined shaft;

[0018] The heat exchanger module includes a heat exchange tube and a heat exchange tube connected by a water supply pipe and a return pipe. The water supply pipe and the return pipe are installed along the inner wall surface of the subway construction inclined shaft. The heat exchange tube is axially arranged on the inner wall of the subway construction inclined shaft.

[0019] In some embodiments of the present invention, protective materials are sprayed on the outside of the heat exchange tubes, water supply pipes and return pipes; the heat exchange system includes a water supply main pipe and a return main pipe arranged in the bottom trough of the subway construction inclined shaft, and the water supply pipe and the return pipe are respectively connected to the water supply main pipe and the return main pipe installed in the trough of the subway construction inclined shaft; valves, pressure gauges and thermometers are installed at the ends of the water supply pipe and the return pipe; the inclined shaft backfill is filled in the interior of the subway construction inclined shaft with fluidized solidified soil.

[0020] In a fourth aspect of the present invention, a construction method for an energy structure of an inclined shaft for subway construction is provided, comprising:

[0021] Step 1: multiple heat exchange pipes are arranged along the axial direction of the subway construction inclined shaft, and both ends of the multiple heat exchange pipes are respectively connected to the water supply pipe and the return pipe;

[0022] Step 2: Fix the heat exchange pipe and the water supply pipe and return pipe used to connect the heat exchange pipe on the inner wall of the subway construction inclined shaft, and test whether the heat exchange pipe is leaking. If it is not leaking, connect the water supply pipe and return pipe to the water supply main pipe and return main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft respectively;

[0023] Step 3, filling the outside of the heat exchange tube with protective material;

[0024] Step 4: backfill the subway construction inclined shaft. Specifically, fluidized solidified soil is used to fill the interior of the subway construction inclined shaft.

[0025] In a fifth aspect of the present invention, there is provided a subway construction inclined shaft energy structure, comprising a heat exchanger module and an inclined shaft backfill, wherein the heat exchanger module is arranged on the wall surface of the subway construction inclined shaft and connected to a heat exchange system arranged in the subway construction inclined shaft, and the inclined shaft backfill is filled in the subway construction inclined shaft;

[0026] The heat exchanger module comprises a heat exchange tube, which is arranged in an S shape on the inner wall of the subway construction inclined shaft along the axial direction of the subway construction inclined shaft, and a protective material is sprayed on the outside of the heat exchange tube.

[0027] In some embodiments of the present invention, the heat exchange system includes a water supply main pipe and a return main pipe arranged in the bottom trough of the subway construction inclined shaft, and the water inlet and the water outlet of the heat exchange pipe are respectively connected to the water supply main pipe and the return main pipe installed in the trough of the subway construction inclined shaft; the water inlet and the water outlet of the heat exchange pipe are installed with valves, pressure gauges and thermometers; the inclined shaft backfill is filled with fluidized solidified soil inside the subway construction inclined shaft.

[0028] In a sixth aspect of the present invention, a construction method for an energy structure of an inclined shaft for subway construction is provided, comprising:

[0029] Step 1: Arrange multiple heat exchange tubes in an S shape along the axial direction of the subway construction inclined shaft;

[0030] Step 2: Fix the heat exchange tube on the inner wall of the subway construction inclined shaft and test whether the heat exchange tube is leaking. If it is not leaking, connect the water inlet and outlet at both ends of the heat exchange tube to the water supply main pipe and return main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft;

[0031] Step 3, filling the outside of the heat exchange tube with protective material;

[0032] Step 4: backfill the subway construction inclined shaft. Specifically, fluidized solidified soil is used to fill the interior of the subway construction inclined shaft.

[0033] One or more technical solutions of the present invention have the following beneficial effects:

[0034] The present invention provides a subway construction inclined shaft energy structure and construction method, which combine the subway construction inclined shaft structure with a heat exchanger, and reuse the subway construction inclined shaft that should have been backfilled and abandoned after the construction is completed. Combined with the heat exchanger module with excellent heat exchange performance, it becomes a new underground energy structure, which can not only significantly reduce the initial investment cost and improve resource utilization, but also achieve the goal of energy conservation and environmental protection, help promote the application of shallow geothermal energy in urban heating and cooling, promote the development of renewable energy, reduce dependence on fossil fuels, and achieve a win-win situation of economic and environmental benefits. It has broad application prospects and significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the installation range of the heat exchanger module provided in Example 1 of the present invention in a subway construction inclined shaft;

[0036] Figure 2 The installation method of the heat exchanger module provided in Example 1 of the present invention in the inclined shaft of a subway construction;

[0037] Figure 3 A front view of a heat exchanger module provided in Example 1 of the present invention;

[0038] Figure 4 This is a left side view of the heat exchanger module provided in Example 1 of the present invention;

[0039] Figure 5 A top view of a heat exchanger module provided in Example 1 of the present invention;

[0040] Figure 6A front view of a plurality of heat exchanger modules provided in Example 1 of the present invention after installation;

[0041] Figure 7 The installation method of the heat exchanger module provided in Example 2 of the present invention in the inclined shaft of a subway construction;

[0042] Figure 8 A flat map of a heat exchanger module provided in Example 2 of the present invention;

[0043] Fig. 9 A front view of a plurality of heat exchanger modules provided in Embodiment 2 of the present invention after installation;

[0044] Fig.10 The installation method of the heat exchanger module provided in Example 3 of the present invention in the inclined shaft of a subway construction;

[0045] Fig.11 A flat map of a heat exchanger module provided in Example 3 of the present invention;

[0046] Fig.12 A front view of a plurality of heat exchanger modules provided in Embodiment 3 of the present invention after installation;

[0047] Fig.13 This is a top view of multiple heat exchanger modules after installation provided by Example 3 of the present invention.

[0048] In the figure: 1. Water supply main pipe; 2. Return water main pipe; 3. Water supply pipe; 4. Return water pipe; 5. Heat exchange pipe; 6. Steel cage; 7. Protective material; 8. Upper part of subway construction inclined shaft; 9. Lower part of subway construction inclined shaft; 10. Inner wall of subway construction inclined shaft; 11. Valve; 12. Thermometer; 13. Pressure gauge. DETAILED DESCRIPTION

[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0050] Example 1

[0051] In a typical embodiment of the present invention, a subway construction inclined shaft energy structure is provided, comprising a heat exchanger module and an inclined shaft backfill, wherein the heat exchanger module is arranged on the wall surface of the subway construction inclined shaft and connected to a heat exchange system arranged in the subway construction inclined shaft, and the inclined shaft backfill is filled in the subway construction inclined shaft;

[0052] The heat exchanger module includes a steel cage and heat exchange pipes, water supply pipes and return pipes installed on the steel cage, the heat exchange pipes are connected by the water supply pipes and the return pipes; the water supply pipes and the return pipes are arranged in an S shape along the vertical cross-section direction of the steel cage, and the heat exchange pipes are installed axially along the subway construction inclined shaft; the steel cage is arranged on the side wall of the subway construction inclined shaft.

[0053] Furthermore, protective materials are sprayed on the outside of the steel cage and the heat exchange pipes, water supply pipes and return pipes installed on the steel cage, and valves, pressure gauges and thermometers are installed at the ends of the water supply pipes and return pipes;

[0054] The inclined shaft backfill includes plain concrete and crushed stone soil, the plain concrete is filled in the upper part of the subway construction inclined shaft, and the crushed stone soil is filled in the lower part of the subway construction inclined shaft.

[0055] Furthermore, the heat exchange system includes a water supply main pipe and a return main pipe arranged in grooves on both sides of the bottom of the subway construction inclined shaft; the water supply pipe and the return pipe are respectively connected to the water supply main pipe and the return main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft.

[0056] This embodiment provides a construction method for an inclined shaft energy structure for subway construction, comprising:

[0057] Step 1: Set up a steel cage according to actual conditions and install heat exchange pipes, water supply pipes and return pipes on the steel cage, wherein the heat exchange pipes are connected through the water supply pipes and the return pipes, and the water supply pipes and the return pipes are arranged in an S shape along the vertical cross-section direction of the steel cage;

[0058] Step 2: Fix the steel cage on the side wall of the subway construction inclined shaft, test whether the heat exchange pipe is leaking, and if it is not leaking, connect the water supply pipe and the return pipe to the water supply main pipe and the return main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft;

[0059] Step 3: Fill the steel cage and the outside of the heat exchange tube with protective materials;

[0060] Step 4: backfill the subway construction inclined shaft. Specifically, use plain concrete to fill the upper part of the subway construction inclined shaft, and use crushed stone soil to fill the lower part of the subway construction inclined shaft.

[0061] In this embodiment, the protective materials specifically include cement mortar, fine sand, etc.; the inclined shaft backfill specifically includes fluidized solidified soil, crushed stone soil, crushed soil and stone, and clay, etc.; cement mortar is sprayed on the wall as a protective material for the heat exchange tube, and the thickness of the sprayed cement mortar should be 30-50mm; the heat exchange tube of the heat exchanger module adopts PE pipe or PPR capillary tube.

[0062] The capillary heat exchanger module is manufactured, which specifically includes the following steps:

[0063] First, make the concrete casting mold and steel cage of the heat exchanger module. The steel cage should be able to withstand the impact of the backfill during the backfilling process of the subway inclined shaft to prevent the heat exchanger pipeline from being damaged;

[0064] Install the PPR capillary tube into the steel cage and fix it with steel wire ties;

[0065] Use cement mortar as the heat exchange tube protection material to cast the heat exchanger module with the help of formwork, and ensure that the steel bars do not leak out;

[0066] Conduct a water pressure test on the heat exchanger module to verify whether the heat exchanger is leaking;

[0067] Finally, connect the water supply and return pipes of the heat exchanger module to the water supply and return main pipes in the inclined well channel.

[0068] like Figure 1-6 As shown, the heat exchanger module is a steel cage with heat exchange tubes installed. The heat exchange tubes 5 used in this embodiment are capillary grids. The heat exchanger module is provided with multiple ones installed on the side walls of the subway construction inclined shaft.

[0069] Before construction, the size of the steel cage 6 should be determined according to the actual project. The height of the side wall of the subway construction inclined shaft in this embodiment is 3.2m, the length and width of the steel cage 6 are 3.1m, and the thickness is 0.5m. Optionally, the steel bars selected for the steel cage 6 in this embodiment are φ10 reinforcement bars.

[0070] Further, the heat exchange tube 5 is tied with a steel wire tie. Figure 3 , Figure 4 , Figure 5 Optionally, the water supply pipe 3 and the water return pipe 4 of the heat exchanger module in this embodiment are installed in an S shape.

[0071] The water supply pipe 3 and the water return pipe 4 of the heat exchanger module are DN15 PPR pipes, and the heat exchange pipe 5 is a PPR capillary grid with an outer diameter of 4.3 mm and a wall thickness of 0.85 mm. The spacing between each capillary in the capillary grid is 10 mm.

[0072] Furthermore, the water supply main pipe 1 and the water return main pipe 2 are installed in the grooves on both sides of the subway construction inclined shaft. The water supply and return main pipes in this embodiment are DN140 PE pipes.

[0073] Further, the steel cage on which the heat exchange tube 5 is installed is Figure 2 Preferably, the steel cage 6 is fixed to the inner wall 10 of the inclined shaft of the subway construction using anchor rods.

[0074] Furthermore, a pressure test is performed to detect whether the heat exchange tube 5 has any water leakage.

[0075] Preferably, the water inlets and outlets at the ends of the water supply pipe 3 and the water return pipe 4 of each heat exchanger module are installed with valves 11, thermometers 12 and pressure gauges 13.

[0076] Furthermore, the water supply pipe 3 and the water return pipe 4 of the heat exchanger module are connected to the water supply main pipe 1 and the water return main pipe 2 respectively. Optionally, the connection method adopts a T-shaped joint and a welding method. In this embodiment, the front view of the plurality of heat exchanger modules after installation is as follows: Figure 6 shown.

[0077] Furthermore, with the aid of a template, cement mortar with 50-mesh fine sand is used as the heat exchange tube protective material 7 to fill the heat exchanger module. After the filling is completed, it is necessary to ensure that the steel bars do not leak out.

[0078] Furthermore, the subway construction inclined shaft is backfilled.

[0079] Optionally, in this embodiment, plain concrete is used to backfill the upper part 8 of the subway construction inclined shaft, and crushed stone soil is used to backfill the lower part 9 of the subway construction inclined shaft. After the backfilling is completed, the subway construction inclined shaft energy structure is formed.

[0080] Furthermore, the water supply main pipe 1 and the return water main pipe 2 are connected to the heat source side of the heat pump unit in the air conditioning room of the heat user building through the water heating well, forming a subway construction inclined shaft energy system to provide heating or cooling for heat users.

[0081] The specific effects of this embodiment are as follows: this embodiment is suitable for the case where the side wall of the inclined shaft of subway construction is seriously uneven, the backfill material particles are large, such as large particles of crushed stone, the maximum can exceed 1.0 meters, and the backfill construction is extensive, such as using transport vehicles and excavators for construction, which produces local large stress on the heat exchanger. Through this embodiment, on the one hand, the problem of damaging the heat exchanger during construction can be solved, and at the same time, the original backfill plan of the inclined shaft is not affected; at the same time, due to the use of an integrated module design solution, the heat exchanger is very efficient and easy to construct.

[0082] Example 2

[0083] In another typical embodiment of the present invention, a subway construction inclined shaft energy structure is provided, comprising a heat exchanger module and an inclined shaft backfill, wherein the heat exchanger module is arranged on the wall surface of the subway construction inclined shaft and connected to a heat exchange system arranged in the subway construction inclined shaft, and the inclined shaft backfill is filled in the subway construction inclined shaft;

[0084] The heat exchanger module includes a heat exchange tube and a water supply pipe and a water return pipe connected by the heat exchange tube. The water supply pipe and the water return pipe are installed along the inner wall surface of the subway construction inclined shaft. The heat exchange tube is axially arranged on the inner wall of the subway construction inclined shaft.

[0085] Furthermore, protective materials are sprayed on the outside of the heat exchange pipes, water supply pipes and return pipes; the heat exchange system includes a water supply main pipe and a return main pipe arranged in the bottom trough of the subway construction inclined shaft, and the water supply pipe and the return pipe are respectively connected to the water supply main pipe and the return main pipe installed in the trough of the subway construction inclined shaft; valves, pressure gauges and thermometers are installed at the ends of the water supply pipe and the return pipe; the inclined shaft backfill is filled in the interior of the subway construction inclined shaft with fluidized solidified soil.

[0086] This embodiment provides a construction method for an inclined shaft energy structure for subway construction, comprising:

[0087] Step 1: multiple heat exchange pipes are arranged along the axial direction of the subway construction inclined shaft, and both ends of the multiple heat exchange pipes are respectively connected to the water supply pipe and the return pipe;

[0088] Step 2: Fix the heat exchange pipe and the water supply pipe and return pipe connected by the heat exchange pipe on the inner wall of the subway construction inclined shaft, and test whether the heat exchange pipe is leaking. If it is not leaking, connect the water supply pipe and return pipe to the water supply main pipe and return main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft respectively;

[0089] Step 3, filling the outside of the heat exchange tube with protective material;

[0090] Step 4: backfill the subway construction inclined shaft. Specifically, fluidized solidified soil is used to fill the interior of the subway construction inclined shaft.

[0091] The difference between this embodiment and embodiment 1 is that the heat exchange tube 5 in the heat exchanger module is directly fixed to the inner wall of the subway construction inclined shaft, but it is necessary to spray cement mortar on the inner wall of the inclined shaft as a protective material 7 for the heat exchange tube after the heat exchange tube 5 is installed to prevent the heat exchange tube 5 from being damaged during the backfilling process. At the same time, the heat exchanger module is symmetrically arranged on both sides of the vault and side wall of the inner wall of the subway construction inclined shaft.

[0092] like Figure 7-9 As shown, the water supply pipe 3 and the water return pipe 4 of the heat exchanger module are installed along the circumferential direction of the inner arc surface of the subway construction inclined shaft, and the heat exchange pipe 5 is installed along the axial direction of the inclined shaft.

[0093] The water supply pipe 3 and the water return pipe 4 of the heat exchange tube 5 in Example 2 are DN20 PPR pipes. The heat exchange tube 5 is a PPR capillary grid with an outer diameter of 4.3 mm and a wall thickness of 0.85 mm. The spacing between each capillary in the capillary grid is 10 mm.

[0094] Before installing the heat exchanger module, it is first necessary to use cement mortar to level the severely uneven parts of the inner wall of the subway construction inclined shaft, with the ratio of sand to cement being 1:3.

[0095] Furthermore, the heat exchange tube 5 is fixed to the inner wall surface of the subway construction inclined shaft. The heat exchange tube 5 of this embodiment is a capillary grid.

[0096] Furthermore, cement mortar with a thickness of about 50 mm is sprayed onto the wall surface as the heat exchange tube protection material 7 .

[0097] Furthermore, the heat exchanger module is subjected to a water pressure test in sections.

[0098] Preferably, valves 11, thermometers 12 and pressure gauges 13 are installed at the water inlets and outlets at the ends of the water supply pipe 3 and the water return pipe 4 of each heat exchanger module.

[0099] Furthermore, the water supply main pipe 1 and the water return main pipe 2 are laid in the channels on both sides of the subway construction inclined shaft. The water supply and return main pipes used in this embodiment are PE pipes of DN140 specification.

[0100] Furthermore, the water supply pipe 3 and the water return pipe 4 of the heat exchanger module are connected to the water supply main pipe 1 and the water return main pipe 2. Optionally, the connection method adopts a T-shaped joint and a welding method. In this embodiment, the front view of the plurality of heat exchanger modules after installation is as follows: Fig. 9 shown.

[0101] Furthermore, the subway construction inclined shaft is backfilled.

[0102] Optionally, in this embodiment, fluidized solidified soil is used to backfill the upper part 8 of the subway construction inclined shaft and the lower part 9 of the subway construction inclined shaft. After the backfilling is completed, the subway construction inclined shaft with the heat exchanger module installed forms the subway construction inclined shaft energy structure.

[0103] Furthermore, the water supply main pipe 1 and the return water main pipe 2 are connected to the heat source side of the heat pump unit in the air conditioning room of the heat user building through the water heating well, forming a subway construction inclined shaft energy system to provide heating or cooling for heat users.

[0104] The specific effects of this embodiment are as follows: the difference between this embodiment and embodiment 1 is that this embodiment is suitable for the situation where the side wall of the inclined shaft of subway construction is relatively flat, the particle diameter of the backfill material is small (not easy to damage the heat exchanger), and the backfill construction process is relatively fine. Since only mortar concrete is used to protect the heat exchanger, on the one hand, the heat exchanger has certain requirements on the inclined shaft backfill material and scheme compared with embodiment 1. On the other hand, since there is no investment in steel cages, etc., the initial investment of the heat exchange system is greatly saved. At the same time, the capillary heat exchanger can be laid along the entire wall of the tunnel, which increases the laying area and improves the total heat exchange and heat exchange efficiency.

[0105] Example 3

[0106] In another typical embodiment of the present invention, a subway construction inclined shaft energy structure is provided, comprising a heat exchanger module and an inclined shaft backfill, wherein the heat exchanger module is arranged on the wall surface of the subway construction inclined shaft and connected to a heat exchange system arranged in the subway construction inclined shaft, and the inclined shaft backfill is filled in the subway construction inclined shaft;

[0107] The heat exchanger module comprises a heat exchange tube, which is arranged in an S shape on the inner wall of the subway construction inclined shaft along the axial direction of the subway construction inclined shaft, and a protective material is sprayed on the outside of the heat exchange tube.

[0108] Furthermore, the heat exchange system includes a water supply main pipe and a return main pipe arranged in the bottom trough of the subway construction inclined shaft, and the water inlet and outlet of the heat exchange pipe are respectively connected to the water supply main pipe and the return main pipe installed in the trough of the subway construction inclined shaft; the water inlet and outlet of the heat exchange pipe are installed with valves, pressure gauges and thermometers; the inclined shaft backfill is filled with fluidized solidified soil inside the subway construction inclined shaft.

[0109] This embodiment provides a construction method for an inclined shaft energy structure for subway construction, comprising:

[0110] Step 1: Arrange multiple heat exchange tubes in an S shape along the axial direction of the subway construction inclined shaft;

[0111] Step 2: Fix the heat exchange tube on the inner wall of the subway construction inclined shaft and test whether the heat exchange tube is leaking. If it is not leaking, connect the water inlet and outlet at both ends of the heat exchange tube to the water supply main pipe and return main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft;

[0112] Step 3, filling the outside of the heat exchange tube with protective material;

[0113] Step 4: backfill the subway construction inclined shaft. Specifically, fluidized solidified soil is used to fill the interior of the subway construction inclined shaft.

[0114] The difference between this embodiment and embodiment 2 is that the heat exchange tubes used in the heat exchanger module are replaced with DN20 PE plastic tubes, and there are no water supply pipe 3 and return pipe 4. At the same time, the heat exchange tubes are laid on the inner wall of the entire subway construction inclined shaft, and the heat exchange tubes are arranged in an S shape along the axial direction of the subway construction inclined shaft on the vault and side wall of the inner wall.

[0115] like Figure 10-13 As shown, the heat exchange tube 5 is evenly laid in an S shape on the inner wall 10 of the subway construction inclined shaft. The water inlet and outlet of the heat exchange tube 5 are respectively located on both sides of the inclined shaft and are connected to the water supply main pipe 1 and the return water main pipe 2 in the trough.

[0116] Before installing the heat exchanger module, it is also necessary to use cement mortar to level the severely uneven parts of the inner wall of the subway construction inclined shaft, with the ratio of sand to cement being 1:3.

[0117] Furthermore, the heat exchange tube 5 is fixed to the inner wall of the subway construction inclined shaft. The heat exchange tube of this embodiment is a DN20 PR material plastic tube, and a steel bracket is used to fix the plastic tube to the inner wall of the inclined shaft.

[0118] Furthermore, cement mortar with a thickness of about 50 mm is sprayed onto the wall surface as the heat exchange tube protection material 7 .

[0119] Furthermore, the heat exchanger module is subjected to a water pressure test in sections.

[0120] Preferably, a valve 11, a thermometer 12 and a pressure gauge 13 are installed at the water inlet and outlet of the heat exchange tube 5 of each heat exchanger module.

[0121] Furthermore, the water supply main pipe 1 and the water return main pipe 2 are respectively laid in the channels on both sides of the subway construction inclined shaft. The water supply and return main pipes in this embodiment are DN140 PE pipes, and the water supply main pipe 1 and the water return main pipe 2 are located on different sides of the subway construction inclined shaft.

[0122] Further, the heat exchange tube 5 is connected to the water supply pipe 1 and the water return pipe 2. Optionally, the connection method adopts a T-joint and a welding method. In this embodiment, the front view of the plurality of heat exchanger modules after installation is shown in the attached figure. Fig.12 shown.

[0123] Furthermore, the subway construction inclined shaft is backfilled.

[0124] Optionally, in this embodiment, fluidized solidified soil is used to backfill the upper part 8 of the subway construction inclined shaft and the lower part 9 of the subway construction inclined shaft. After the backfilling is completed, the subway construction inclined shaft with the heat exchanger module installed forms the subway construction inclined shaft energy structure.

[0125] Furthermore, the water supply main 1 and the return main 2 are connected to the heat source side of the heat pump unit in the air-conditioning room of the heat user building through the water heating well, forming a subway construction inclined shaft energy system to provide heating or cooling for the heat users.

[0126] The specific effects of this embodiment are as follows: the difference between this embodiment and embodiment 2 is that the heat exchange tube is replaced with a DN20 PR material plastic tube. Compared with the capillary tube of embodiment 2, the heat exchanger itself has a larger diameter and wall thickness, a smaller circulation resistance, and a stronger structural bearing capacity. Although the heat exchange per unit area of ​​the heat exchanger is reduced during operation, the yield rate during construction is improved (it is not easy to damage the heat exchanger due to cross-construction of multiple types of work), the energy consumption of the distribution system in the later stage of the system is reduced, and the requirements for backfill materials and solutions are very low. At the same time, the initial investment is smaller than that of embodiment 1.

[0127] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A subway construction inclined shaft energy structure, characterized in that: It includes a heat exchanger module and an inclined shaft backfill, wherein the heat exchanger module is arranged on the wall surface of the subway construction inclined shaft and connected to a heat exchange system arranged in the subway construction inclined shaft, and the inclined shaft backfill is filled in the subway construction inclined shaft; The heat exchanger module includes a steel cage and a heat exchange pipe, a water supply pipe and a return pipe installed on the steel cage. The heat exchange pipe is connected to the return pipe through the water supply pipe; the water supply pipe and the return pipe are arranged in an S shape along the vertical cross-section direction of the steel cage, and the heat exchange pipe is installed axially along the subway construction inclined shaft; the steel cage is arranged on the side wall of the subway construction inclined shaft.

2. A subway construction inclined shaft energy structure as claimed in claim 1, characterized in that: Protective materials are sprayed on the steel cage and the heat exchange tubes, water supply pipes and return pipes installed on the steel cage, and valves, pressure gauges and thermometers are installed at the ends of the water supply pipes and return pipes; The inclined shaft backfill includes plain concrete and crushed stone soil, the plain concrete is filled in the upper part of the subway construction inclined shaft, and the crushed stone soil is filled in the lower part of the subway construction inclined shaft.

3. A subway construction inclined shaft energy structure as claimed in claim 2, characterized in that: The heat exchange system includes a water supply main pipe and a return water main pipe arranged in grooves on both sides of the bottom of the subway construction inclined shaft; the water supply pipe and the return water pipe are respectively connected to the water supply main pipe and the return water main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft.

4. A method for constructing an energy structure for an inclined shaft of a subway construction as claimed in any one of claims 1 to 3, characterized in that: include: Step 1: Set up a steel cage according to actual conditions and install a heat exchange pipe, a water supply pipe and a return pipe on the steel cage, wherein the heat exchange pipe is connected to the return pipe through the water supply pipe, and the water supply pipe and the return pipe are arranged in an S shape along the vertical cross-section direction of the steel cage; Step 2: Fix the steel cage on the side wall of the subway construction inclined shaft, test whether the heat exchange pipe is leaking, and if it is not leaking, connect the water supply pipe and the return pipe to the water supply main pipe and the return main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft; Step 3: Fill the steel cage and the outside of the heat exchange tube with protective materials; Step 4: backfill the subway construction inclined shaft. Specifically, use plain concrete to fill the upper part of the subway construction inclined shaft, and use crushed stone soil to fill the lower part of the subway construction inclined shaft.

5. A subway construction inclined shaft energy structure, characterized in that: It includes a heat exchanger module and an inclined shaft backfill, wherein the heat exchanger module is arranged on the wall surface of the subway construction inclined shaft and connected to a heat exchange system arranged in the subway construction inclined shaft, and the inclined shaft backfill is filled in the subway construction inclined shaft; The heat exchanger module includes a heat exchange tube and a water supply pipe and a water return pipe connected by the heat exchange tube. The water supply pipe and the water return pipe are installed along the inner wall surface of the subway construction inclined shaft. The heat exchange tube is axially arranged on the inner wall of the subway construction inclined shaft.

6. A subway construction inclined shaft energy structure as claimed in claim 5, characterized in that: Protective materials are sprayed on the outside of the heat exchange pipes, water supply pipes and return pipes; the heat exchange system includes a water supply main pipe and a return main pipe arranged in the bottom trough of the subway construction inclined shaft, and the water supply pipe and the return pipe are respectively connected to the water supply main pipe and the return main pipe installed in the trough of the subway construction inclined shaft; valves, pressure gauges and thermometers are installed at the ends of the water supply pipe and the return pipe; the inclined shaft backfill is filled with fluidized solidified soil inside the subway construction inclined shaft.

7. A method for constructing an energy structure for an inclined shaft of a subway construction as claimed in any one of claims 5 to 6, characterized in that: include: Step 1: multiple heat exchange pipes are arranged along the axial direction of the subway construction inclined shaft, and both ends of the multiple heat exchange pipes are respectively connected to the water supply pipe and the return pipe; Step 2: Fix the heat exchange pipe and the water supply pipe and return pipe connected by the heat exchange pipe on the inner wall of the subway construction inclined shaft, and test whether the heat exchange pipe is leaking. If it is not leaking, connect the water supply pipe and return pipe to the water supply main pipe and return main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft respectively; Step 3, filling the outside of the heat exchange tube with protective material; Step 4: backfill the subway construction inclined shaft. Specifically, fluidized solidified soil is used to fill the interior of the subway construction inclined shaft.

8. An energy structure for a subway construction inclined shaft, characterized in that: It includes a heat exchanger module and an inclined shaft backfill, wherein the heat exchanger module is arranged on the wall surface of the subway construction inclined shaft and connected to a heat exchange system arranged in the subway construction inclined shaft, and the inclined shaft backfill is filled in the subway construction inclined shaft; The heat exchanger module comprises a heat exchange tube, which is arranged in an S shape on the inner wall of the subway construction inclined shaft along the axial direction of the subway construction inclined shaft, and a protective material is sprayed on the outside of the heat exchange tube.

9. A subway construction inclined shaft energy structure as claimed in claim 8, characterized in that: The heat exchange system includes a water supply main pipe and a return water main pipe arranged in the bottom trough of the subway construction inclined shaft. The water inlet and the water outlet of the heat exchange pipe are respectively connected to the water supply main pipe and the return water main pipe installed in the trough of the subway construction inclined shaft; the water inlet and the water outlet of the heat exchange pipe are installed with valves, pressure gauges and thermometers; the inclined shaft backfill is filled in the interior of the subway construction inclined shaft with fluidized solidified soil.

10. A method for constructing an energy structure for an inclined shaft of a subway construction as claimed in any one of claims 8 to 9, characterized in that: include: Step 1: Arrange multiple heat exchange tubes in an S shape along the axial direction of the subway construction inclined shaft; Step 2: Fix the heat exchange tube on the inner wall of the subway construction inclined shaft and test whether the heat exchange tube is leaking. If it is not leaking, connect the water inlet and outlet at both ends of the heat exchange tube to the water supply main pipe and return main pipe installed in the grooves on both sides of the bottom of the subway construction inclined shaft; Step 3, filling the outside of the heat exchange tube with protective material; Step 4: backfill the subway construction inclined shaft. Specifically, fluidized solidified soil is used to fill the interior of the subway construction inclined shaft.

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