Nuclear energy heating pipeline support assembly foundation and construction method

Abstract

The present invention provides a prefabricated foundation and construction method for a nuclear energy heating pipeline support. The prefabricated foundation includes a conversion base, a mounting piece is provided at one end of the conversion base, and at least three guide tube piles are detachably connected at the other end. The three guide tube piles are arranged at intervals around the circumference of the conversion base and are arranged at an angle between two guide tube piles. The guide tube piles are inserted below the target ground to support the conversion base. A grouting pipe is provided in the guide tube pile, and the grouting pipe is passed through the guide tube pile and extends to the guide tube pile head. The guide tube pile head is provided with at least one grouting hole. The slurry in the grouting pipe is sprayed into the external stratum of the guide tube pile through the grouting hole to form a grouting body. The present invention converts the horizontal thrust and overturning moment transmitted by the mounting piece into the axial load of the inclined guide tube pile, and transmits the axial load to the deep stratum with better mechanical properties through the guide tube pile. It can not only improve the load transmission efficiency of the foundation, but also the components are all prefabricated in the factory, and the construction and installation are convenient, which improves the efficiency and safety of on-site construction.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear energy heating engineering construction, and in particular to an assembled foundation for a nuclear energy heating pipeline support and a construction method. Background Art

[0002] Nuclear fission releases huge amounts of energy, and traditional nuclear power plants only use this energy to generate electricity. Nuclear energy heating extracts steam from the secondary circuit of the nuclear power unit as a heat source, exchanges heat through multi-stage heat exchange stations, and finally transfers heat to end users through the municipal heating pipeline network.

[0003] Nuclear energy heating is an important way of comprehensive utilization of nuclear energy. As a clean, zero-carbon, green new form of heating, it is of great significance for solving urban centralized heating, reducing environmental pollution, and especially reducing carbon emissions.

[0004] Nuclear energy heating uses large-diameter pipes to transmit high-temperature and high-pressure steam from the steam turbine plant to the heat exchange station. In order to facilitate timely inspection and repair of leaks, the heating pipes are generally laid above the ground with pipe supports. The pipe supports currently use independent foundations, which are simple in design and low in technical difficulty. However, due to the huge temperature stress on the nuclear energy heating pipes, the horizontal thrust and overturning moment borne by the support foundation are very large. However, the efficiency of independent foundations in transmitting horizontal loads and bending moments is low. Therefore, the foundation size is designed to be very large and the burial depth is also very deep (reaching 3-5m), resulting in large foundation engineering and foundation trench excavation, and high construction safety risks.

[0005] On the other hand, currently the support foundation is all constructed on-site. Although the construction technology is mature, the construction involves multiple steps such as foundation pit support excavation, steel bar binding, formwork erection, and concrete pouring and maintenance. The process is cumbersome and the degree of mechanization is low, resulting in low construction efficiency, high labor costs, and long construction period.

[0006] In addition, nuclear power plants are far away from urban areas, and the heating pipeline lines are very long, reaching dozens or even hundreds of kilometers. The corresponding support foundations may reach thousands or even tens of thousands. Combined with the aforementioned independent foundation characteristics, the current support foundation technical solution will cause a significant increase in the overall project volume, construction period and cost.

[0007] Based on this, the present application proposes an assembled foundation and construction method for a nuclear energy heating pipe support in order to solve the above technical problems. Summary of the invention

[0008] The technical problem to be solved by the present invention is to overcome the defects of low load transfer efficiency, low degree of prefabrication, complicated construction process, high safety risk and long construction period of the pipe support foundation in the prior art, and to provide an assembled foundation and construction method for a nuclear energy heating pipe support.

[0009] The present invention solves the above technical problems through the following technical solutions:

[0010] The present invention provides a nuclear energy heating pipeline support assembled foundation, which is characterized by comprising:

[0011] A conversion base, one end of which is provided with a mounting piece, and the other end of which is detachably connected with at least three guide tube piles, the three guide tube piles are arranged at intervals around the circumference of the conversion base and are arranged at an angle between two of them, and the guide tube piles are inserted below the target ground to support the conversion base;

[0012] A grouting pipe is provided in the catheter pile, the grouting pipe is passed through the catheter pile and extends to the catheter pile head, the catheter pile head is provided with at least one grouting hole, and the slurry in the grouting pipe is sprayed through the grouting hole into the external stratum of the catheter pile to form a grouting body;

[0013] The catheter pile comprises a pile body, a pile top and a pile head, a containing chamber is provided in the catheter pile, and the pile body and the pile top are separated by a first partition, and the pile body and the pile head are separated by a second partition, and the containing chambers correspond to the first chamber in the pile top, the second chamber in the pile body and the third chamber in the pile head respectively;

[0014] The pile body is provided with a first grouting nozzle, one end of the grouting pipe is connected to the first grouting nozzle, and the other end extends to the pile head and is inserted into the pile head, and the grouting hole is opened in the pile head;

[0015] A second grouting nozzle is provided on the pile top;

[0016] The conversion base comprises a top plate and a bottom plate which are spaced apart from each other, wherein the top plate and the bottom plate are connected via at least three support plates, and a spacer chamber is formed between the top plate and the bottom plate;

[0017] One end of the first chamber is communicated with the partition chamber through an overflow nozzle.

[0018] According to one embodiment of the present invention, the pile head is conical, and a plurality of grouting holes are provided on the pile head along its outer circumference and axial direction.

[0019] According to one embodiment of the present invention, at least three force transmission rods are provided on the conversion base, one end of the force transmission rod is connected to the conversion base, and the other end is inserted into the first chamber and connected to the high-strength mortar filled into the first chamber through the second grouting nozzle.

[0020] According to an embodiment of the present invention, a plurality of groups of annular ribs are provided on the force transmission rod, and the plurality of groups of annular ribs are arranged at intervals along the axial direction of the force transmission rod.

[0021] According to one embodiment of the present invention, the first grouting nozzle and the second grouting nozzle are at least located above the target ground.

[0022] According to one embodiment of the present invention, the axial direction of the catheter pile is consistent with that of the force transmission rod;

[0023] The length extension direction of the support plate coincides with the vertical projection of the force transmission rod along the conversion base.

[0024] According to an embodiment of the present invention, the axis of the catheter pile is set at an angle with the axis of the conversion base, and the distance between the end of the catheter pile away from the conversion base and the axis of the conversion base gradually increases along the axis direction of the conversion base.

[0025] According to an embodiment of the present invention, the mounting member is a steel column, and the steel column is welded to the conversion base; or,

[0026] The mounting piece is a reinforced concrete column, a mechanical connection sleeve and a welded shear key are welded to the top of the conversion base, and the longitudinal reinforcement of the reinforced concrete column is connected to the conversion base through the mechanical connection sleeve.

[0027] The present invention also provides a method for constructing a nuclear energy heating pipe support assembled foundation, which is implemented by using the nuclear energy heating pipe support assembled foundation as described above, and the method comprises:

[0028] Step 1: using a pile driving device to drive a pipe pile into the ground at a target location on the target ground;

[0029] Step 2, installing the conversion base, ensuring that the force transmission rod of the conversion base is inserted into the pile top of the catheter pile; wherein the axis of the catheter pile is coaxial with the axis of the force transmission rod;

[0030] Step 3, filling high-pressure cement slurry into the pile head through the first grouting nozzle, constructing a grouting body in the stratum at the pile head, and filling high-strength mortar into the pile top through the second grouting nozzle to form a connecting anchor body in the first chamber;

[0031] Step 4: After the grouting body and the connecting anchor body meet the design strength requirements, the mounting parts are installed on the conversion base.

[0032] The positive and progressive effects of the present invention are:

[0033] The assembled foundation of the nuclear energy heating pipe support of the present invention is provided with a conversion base, which can convert the horizontal thrust and overturning bending moment transmitted by the mounting parts into the axial load of the inclined conduit piles, and transmit the axial load to the deep formation with better mechanical properties through the inclined conduit piles. Compared with the existing independent foundation scheme, the present invention greatly improves the load transfer efficiency of the foundation.

[0034] At the same time, the conversion base and the guide piles can be prefabricated in the factory, and there is no need to excavate a large foundation trench during on-site construction. This reduces the amount of foundation engineering and the cost, while greatly improving on-site construction efficiency and safety, and significantly shortening the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0036] Figure 1 A three-dimensional diagram of the assembled foundation of the nuclear energy heating pipeline support of the present invention;

[0037] Figure 2 A state diagram of the assembled foundation of the nuclear energy heating pipe support of the present invention being buried in the target ground;

[0038] Figure 3 for Figure 2 A top view of

[0039] Figure 4 It is a schematic diagram of the structure of the catheter pile of the present invention;

[0040] Figure 5 for Figure 4 An internal cross-sectional view of a conduit pile;

[0041] Figure 6 It is a structural schematic diagram of the grouting body of the present invention;

[0042] Figure 7 It is a structural schematic diagram of an embodiment of the conversion base of the present invention;

[0043] Figure 8 It is a schematic diagram of the coordination between the force transmission rod and the guide pipe pile;

[0044] Fig. 9 It is a structural schematic diagram of the conversion base of the present invention;

[0045] Fig.10 is a structural schematic diagram of the dowel rod;

[0046] Fig.11 It is a schematic diagram of the placement of an embodiment of a nuclear energy heating pipe support assembly foundation and a heating pipe before assembly;

[0047] Fig.12 The present invention is a flow chart of the method for constructing an assembled foundation of a nuclear energy heating pipeline support.

[0048] 1. Conversion base; 11. Mounting piece; 111. Mechanical connection sleeve; 112. Welded shear key; 12. Force transmission rod; 121. Annular rib plate; 13. Target ground; 14. Top plate; 15. Bottom plate; 16. Support plate; 17. Interval chamber; 18. Overflow nozzle;

[0049] 2. Pipe pile; 21. Grouting pipe; 22. Grouting hole; 23. Grouting body; 24. Pile body; 241. First grouting nozzle; 25. Pile top; 251. Second grouting nozzle; 26. Pile head; 27. Accommodating chamber; 271. First chamber; 272. Second chamber; 273. Third chamber; 274. First partition; 275. Second partition;

[0050] 28. Connect the anchor body. DETAILED DESCRIPTION

[0051] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0053] Please refer to Figures 1 to 6 The present invention proposes an assembled foundation for a nuclear energy heating pipeline support, including a conversion base 1, one end of the conversion base 1 is provided with a mounting member 11, and the other end is detachably connected with at least three conduit piles 2, the three conduit piles 2 are arranged around the circumference of the conversion base 1 at intervals and are set at an angle between each other, and the conduit piles 2 are inserted below the target ground 13 to support the conversion base 1.

[0054] A grouting pipe 21 is provided in the catheter pile 2. The grouting pipe 21 penetrates the catheter pile 2 and extends to the head of the catheter pile 2. At least one grouting hole 22 is opened in the head of the catheter pile 2. The slurry in the grouting pipe 21 is sprayed into the external stratum of the catheter pile 2 through the grouting hole 22 to form a grouting body 23.

[0055] The present invention improves the traditional cast-in-place independent foundation into an assembled conduit foundation, which can not only improve the efficiency of the foundation in resisting horizontal thrust and overturning bending moment, but also greatly reduce the foundation engineering workload, improve construction efficiency and shorten the construction period.

[0056] Please refer to Figure 2 First, the guide pile 2 is driven into the target position of the target ground 13 by using a pile driving device, and then the conversion base 1 is installed. The horizontal thrust and overturning bending moment transmitted from the mounting member 11 are converted into the axial load of the guide pile 2 through the conversion base 1, and the axial load is transmitted to the deep formation with better mechanical properties through the inclined guide pile 2.

[0057] Compared with the traditional independent foundation solution, the present invention greatly improves the load transfer efficiency of the foundation. At the same time, because the conversion base 1 and the guide pipe pile 2 are separately and detachably arranged, the conversion base 1 and the guide pipe pile 2 can be prefabricated in the factory, and there is no need to excavate a large foundation trench during on-site construction. This reduces the foundation cost while greatly improving the on-site construction efficiency and safety, and greatly shortens the construction period.

[0058] That is, the present invention solves the problems of large engineering volume, high construction cost, and low efficiency in resisting horizontal thrust and overturning bending moment of the current nuclear energy heating pipeline support prefabricated foundation, and solves the problems of complicated procedures, low degree of prefabrication, high safety risks, and long construction period in the existing support foundation construction process, thereby greatly improving the construction convenience of the support foundation and improving the overall economy of the nuclear energy heating project.

[0059] Please refer to Figure 4 and Figure 5 The catheter pile 2 includes a pile body 24, a pile top 25 and a pile head 26. An accommodating chamber 27 is opened in the catheter pile 2, and the pile body 24 and the pile top 25 are separated by a first partition plate 274, and the pile body 24 and the pile head 26 are separated by a second partition plate 275. The accommodating chamber 27 corresponds to a first chamber 271 in the pile top 25, a second chamber 272 in the pile body 24 and a third chamber 273 in the pile head 26 respectively; a first grouting nozzle 241 is provided on the pile body 24, one end of the grouting pipe 21 is connected to the first grouting nozzle 241, and the other end extends to the pile head 26 and is inserted in the pile head 26, and a grouting hole 22 is opened on the pile head 26.

[0060] The grouting pipe 21 is a hollow steel pipe, and its outer diameter, wall thickness and material are consistent with those of the first grouting nozzle 241. The upper end of the grouting pipe 21 is connected to the first grouting nozzle 241, and the lower end extends to the second partition plate 275, and is penetrated through the second partition plate 275 and extends into the pile head 26.

[0061] The pile body 24 is a round steel pipe made of Q235B, with a diameter of generally 100-300 mm and a wall thickness of generally 5-10 mm. The length of the pile body 24 is determined according to calculations. The better the foundation conditions, the shorter the length, generally 3-10 m.

[0062] The first partition plate 274 and the second partition plate 275 are connected to the conduit pile 2 by welding.

[0063] Please refer to Figure 6 During grouting, high-pressure cement slurry is injected from the first grouting nozzle 241, and the slurry flows into the pile head 26 through the grouting pipe 21, and then is evenly sprayed into the stratum outside the pile head 26 through the grouting holes 22 set on the pile head 26. Through the effects of high-pressure splitting and seepage, a spherical grouting body 23 is formed, thereby improving the overall axial compressive and tensile bearing capacity of the guide pipe pile 2.

[0064] That is, the structure of the conduit pile 2 is easier to be inserted into the stratum, and then a stable grouting body 23 can be formed under the stratum through the first grouting nozzle 241, thereby improving the supporting stability of the conversion base 1 and the conduit pile 2.

[0065] In one embodiment, the pile head 26 is conical, and a plurality of grouting holes 22 are provided on the pile head 26 along its outer circumference and axial direction.

[0066] The pile head 26 is set to be conical, which is more conducive to inserting into the stratum. A plurality of grouting holes 22 are evenly arranged on the pile head 26 along its outer circumference and axial direction, which is conducive to forming a grouting body 23 with a more uniform shape on the outer circumference of the pile head 26, thereby improving the connection strength between the pipe pile 2 and the stratum.

[0067] Specifically, the first grouting nozzle 241 and the second grouting nozzle 251 are both hollow round tubes with an outer diameter of 20-30 mm, a wall thickness of 3-6 mm, a length of 30-100 mm, and are made of the same material as the pile body 24 .

[0068] Please refer to Figure 5 A second grouting nozzle 251 is provided on the pile top 25; at least three force transmission rods 12 are provided on the conversion base 1, one end of the force transmission rod 12 is connected to the conversion base 1, and the other end is inserted into the first chamber 271 and connected to the high-strength mortar filled into the first chamber 271 by the second grouting nozzle 251.

[0069] The minimum number of force transmission rods 12 is three. Four are used as an example in the figures of the present invention, but the number is not limited.

[0070] In order to ensure the connection stability between the conversion base 1 and the guide pipe pile 2, a second grouting nozzle 251 is provided on the pile top 25, and high-strength mortar is injected to connect the force transfer rod 12 and the guide pipe pile 2 to form a connection anchor body 28.

[0071] Please refer to Figures 7 to 10 The force transmission rod 12 is provided with a plurality of groups of annular ribs 121 , and the plurality of groups of annular ribs 121 are arranged at intervals along the axial direction of the force transmission rod 12 .

[0072] The number of the annular ribs 121 is not limited here. The function of the annular ribs 121 is to increase the connection area between the force transmission rod 12 and the connecting anchor body 28, thereby improving the connection strength between the force transmission rod 12 and the guide pipe pile 2.

[0073] It can be seen that, in order to facilitate grouting, during the construction of the guide pipe pile 2, it is ensured that after the construction is completed, the first grouting nozzle 241 and the second grouting nozzle 251 are located above the target ground surface 13.

[0074] That is, the guide pipe pile 2 is first driven into the ground, and then grouting is performed through the first grouting nozzle 241 to form a grouting body 23, and grouting is performed through the second grouting nozzle 251 to form a connecting anchor body 28, thereby improving the supporting performance of the conversion base 1 while improving the supporting stability of the guide pipe pile 2.

[0075] Please refer to Figure 7 The conversion base 1 includes a top plate 14 and a bottom plate 15 which are spaced apart. The top plate 14 and the bottom plate 15 are connected by at least three support plates 16. A spacing chamber 17 is formed between the top plate 14 and the bottom plate 15. One end of the first chamber 271 is connected to the spacing chamber 17 through an overflow nozzle 18.

[0076] The bottom plate 15, the top plate 14 and the support plate 16 form a spatial plate-shell structure, which can minimize the use of materials while safely and stably transmitting the load, thereby improving the economy of the prefabricated foundation.

[0077] One end of the overflow nozzle 18 is connected to the first chamber 271, and the other end is connected to the partition chamber 17. During grouting, the second grouting nozzle 251 injects high-strength mortar into the first chamber 271. Excess mortar can overflow from the overflow nozzle 18, thereby fully exhausting the gas, ensuring that the connection anchor body 28 is dense and free of bubbles, and ensuring the reliability of the connection between the catheter pile 2 and the conversion base 1.

[0078] Please refer to Figures 8 to 11 The axial directions of the guide tube pile 2 and the force transmission rod 12 are consistent, and the length extension direction of the support plate 16 coincides with the vertical projection of the force transmission rod 12 along the conversion base 1.

[0079] The axial directions of the guide pipe pile 2 and the force transmission rod 12 are set to be consistent, so that the force transmission rod 12 can better transmit the force of the bottom plate 15 to the guide pipe pile 2 through the force transmission rod 12, and then transmit it to the formation.

[0080] At the same time, the length extension direction of the support plate 16 is further coincided with the vertical projection of the force transmission rod 12 along the conversion base 1, so that the load on the top of the top plate 14 is transmitted to the formation in one direction through the top plate 14, the support plate 16 and the force transmission rod 12, and the force transmission path does not change, which not only meets the structural stability of the conversion base 1, but also better transmits the load to the formation, and the supporting stability of the guide pipe pile 2 is better.

[0081] For details, please refer to Fig.11 The conversion base 1 is connected to the heating pipe through the mounting member 11. The weight of the heating pipe itself is transmitted to the stratum through the mounting member 11, the support plate 16 and the conduit pile 2, and the force transmission path of the heating pipe does not bend. In this way, the load can be transmitted to the stratum more directly, which not only protects the conversion base 1 and the conduit pile 2, but also ensures the supporting performance of the conversion base 1 and the conduit pile 2.

[0082] Please continue to refer to Figure 1 and Figure 2 The axis of the catheter pile 2 is set at an angle to the axis of the conversion base 1, and the distance between the end of the catheter pile 2 away from the conversion base 1 and the axis of the conversion base 1 along the axis direction of the conversion base 1 gradually increases.

[0083] The plurality of pipe piles 2 are arranged in a divergent manner to increase the resistance between the pipe piles 2 and the stratum, thereby increasing the support stability of the pipe piles 2 .

[0084] Each of the catheter piles 2 corresponds to a dowel rod 12 , and the inclination angle of the catheter pile 2 is consistent with the inclination angle of the dowel rod 12 . During construction, it is necessary to ensure that the dowel rod 12 and the catheter pile 2 are coaxial.

[0085] The function of the guide pipe pile 2 is to transfer the axial load transmitted by the force transmission rod 12 to the deep stratum with better mechanical properties, so as to obtain greater bearing capacity and smaller foundation deformation.

[0086] This connection method only requires on-site grouting operations, avoiding on-site welding construction and greatly reducing the construction difficulty.

[0087] Specifically, the inclination angle of the guide tube pile 2 is 15-35°, and the lower the foundation soil strength, the larger the angle.

[0088] In one embodiment, the mounting member 11 is a steel column, which is welded to the conversion base 1. Alternatively,

[0089] The mounting part 11 is a reinforced concrete column, and a mechanical connection sleeve 111 and a welded shear key 112 are welded on the top of the conversion base 1. The longitudinal reinforcement of the reinforced concrete column is connected to the conversion base 1 through the mechanical connection sleeve 111. That is, the mechanical connection sleeve 111 is connected to the longitudinal reinforcement of the reinforced concrete column, and then the column stirrups are installed, and finally the formwork is supported for pouring.

[0090] Please refer to Fig.12 The present invention also proposes a method for constructing a nuclear energy heating pipe support assembly foundation, which is implemented by using the above nuclear energy heating pipe support assembly foundation, and the method includes:

[0091] S1. Use piling equipment to drive the guide pipe pile into the ground at the target position on the target ground.

[0092] S2. Install the conversion base, and ensure that the force transmission rod of the conversion base is inserted into the pile top of the guide tube pile; wherein the axis of the guide tube pile is coaxial with the axis of the force transmission rod;

[0093] S3, filling high-pressure cement slurry into the pile head through the first grouting nozzle, forming a grouting body in the stratum at the pile head, and filling high-strength mortar into the pile top through the second grouting nozzle to form a connecting anchor body in the first chamber;

[0094] S4. After the grouting body and the connecting anchor body meet the design strength requirements, install the mounting parts on the conversion base.

[0095] For step 3, when injecting high-strength mortar into the top of the pile through the second grouting nozzle, the grouting speed should not be too fast. The overflow nozzle should be ensured to continuously discharge excess mortar for at least 30 seconds before stopping the grouting to ensure that the formed connection anchor body is dense and free of bubbles.

[0096] When high-pressure cement slurry is injected into the pile head through the first grouting nozzle, the slurry will flow into the third chamber through the grouting pipe, and then be evenly sprayed into the surrounding strata of the conical pile head through the grouting holes. Through high-pressure splitting and seepage, a spherical pile end grouting body is formed, thereby improving the overall axial compressive and tensile bearing capacity of the guide pipe pile.

[0097] For step 4, after the grouting body and the connecting anchor body have reached the designed strength, the support column is connected and installed with the conversion base.

[0098] In summary, the assembled foundation of the nuclear energy heating pipe support of the present invention is provided with a conversion base, and the horizontal thrust and overturning bending moment transmitted by the mounting parts are converted into the axial load of the inclined guide pipe piles, and the axial load is transmitted to the deep formation with better mechanical properties through the guide pipe piles. Compared with the existing independent foundation scheme, the present invention greatly improves the load transfer efficiency of the foundation.

[0099] At the same time, the conversion base and the guide piles can be prefabricated in the factory, and there is no need to dig a large foundation trench during on-site construction, which reduces the foundation cost and greatly improves the efficiency and safety of on-site construction, greatly shortening the construction period.

[0100] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "install", "connect", "connect", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0101] The present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0102] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A nuclear energy heating pipe support assembled foundation, characterized in that: include: A conversion base, one end of which is provided with a mounting piece, and the other end of which is detachably connected with at least three guide tube piles, the three guide tube piles are arranged at intervals around the circumference of the conversion base and are arranged at an angle between two of them, and the guide tube piles are inserted below the target ground to support the conversion base; A grouting pipe is provided in the catheter pile, the grouting pipe is passed through the catheter pile and extends to the catheter pile head, the catheter pile head is provided with at least one grouting hole, and the slurry in the grouting pipe is sprayed through the grouting hole into the external stratum of the catheter pile to form a grouting body; The catheter pile comprises a pile body, a pile top and a pile head, a containing chamber is provided in the catheter pile, and the pile body and the pile top are separated by a first partition, and the pile body and the pile head are separated by a second partition, and the containing chambers correspond to the first chamber in the pile top, the second chamber in the pile body and the third chamber in the pile head respectively; The pile body is provided with a first grouting nozzle, one end of the grouting pipe is connected to the first grouting nozzle, and the other end extends to the pile head and is inserted into the pile head, and the grouting hole is opened in the pile head; A second grouting nozzle is provided on the pile top; The conversion base comprises a top plate and a bottom plate which are spaced apart from each other, wherein the top plate and the bottom plate are connected via at least three support plates, and a spacer chamber is formed between the top plate and the bottom plate; One end of the first chamber is connected to the partition chamber through an overflow nozzle; At least three force transmission rods are arranged on the conversion base, one end of each force transmission rod is connected to the conversion base, and the other end of each force transmission rod is inserted into the first chamber and connected to the high-strength mortar filled into the first chamber through the second grouting nozzle.

2. The assembled foundation of the nuclear energy heating pipe support according to claim 1 is characterized in that: The pile head is conical, and a plurality of grouting holes are arranged on the pile head along its outer circumference and axial direction.

3. The assembled foundation of the nuclear energy heating pipe support according to claim 1 is characterized in that: The force transmission rod is provided with a plurality of groups of annular ribs, and the plurality of groups of annular ribs are arranged at intervals along the axial direction of the force transmission rod.

4. The assembled foundation of the nuclear energy heating pipe support according to claim 1 is characterized in that: The first grouting nozzle and the second grouting nozzle are at least located above the target ground.

5. The assembled foundation of the nuclear energy heating pipe support according to claim 1 is characterized in that: The axial direction of the catheter pile is consistent with that of the force transmission rod; The length extension direction of the support plate coincides with the vertical projection of the force transmission rod along the conversion base.

6. The assembled foundation of a nuclear energy heating pipe support according to any one of claims 1 to 5, characterized in that: The axis of the catheter pile is set at an angle with the axis of the conversion base, and the distance between the end of the catheter pile away from the conversion base and the axis of the conversion base gradually increases along the axis direction of the conversion base.

7. The assembled foundation of a nuclear energy heating pipe support according to any one of claims 1 to 5, characterized in that: The mounting member is a steel column, and the steel column is welded to the conversion base; or, The mounting piece is a reinforced concrete column, a mechanical connection sleeve and a welded shear key are welded to the top of the conversion base, and the longitudinal reinforcement of the reinforced concrete column is connected to the conversion base through the mechanical connection sleeve.

8. A method for constructing a nuclear energy heating pipe support assembly foundation, which is implemented by using the nuclear energy heating pipe support assembly foundation as described in any one of claims 1 to 7, characterized in that: The method comprises: Step 1: using a pile driving device to drive a pipe pile into the ground at a target location on the target ground; Step 2, installing the conversion base, ensuring that the force transmission rod of the conversion base is inserted into the pile top of the catheter pile; wherein the axis of the catheter pile is coaxial with the axis of the force transmission rod; Step 3, filling high-pressure cement slurry into the pile head through the first grouting nozzle, constructing a grouting body in the stratum at the pile head, and filling high-strength mortar into the pile top through the second grouting nozzle to form a connecting anchor body in the first chamber; Step 4: After the grouting body and the connecting anchor body meet the design strength requirements, the mounting parts are installed on the conversion base.

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