Pile-supported embankment for deep soft soil roadbed

Abstract

The utility model provides a pile-supported embankment for a deep soft soil roadbed. The pile-supported embankment comprises a plurality of prefabricated main piles, a plurality of prefabricated auxiliary piles, a plurality of secondary piles and a plurality of connecting oblique beams. The plurality of prefabricated main piles are arranged in the deep soft soil roadbed in a grid shape; the prefabricated auxiliary piles are connected with the two adjacent prefabricated main piles through the connecting oblique beams correspondingly. The secondary piles are arranged in a foundation where a reinforcing area defined by the multiple prefabricated main piles and the multiple prefabricated auxiliary piles jointly is located. The structure can effectively solve the problem that the soil squeezing effect is too large when a pile-supported embankment for achieving corresponding bearing capacity through traditional treatment of a deep soft soil layer is too dense in piling and too small in pile distance, can effectively reduce the problem that the stability of a foundation is affected due to too large lateral displacement of a pile body, can effectively reduce the pile material cost, and improves the construction economy.

Description

Technical Field

[0001] The present application relates to the field of geotechnical engineering, and in particular to a pile-supported embankment for a deep soft soil roadbed. Background Art

[0002] With the rapid development of geotechnical engineering, pile-supported embankments have been widely adopted worldwide, and their construction methods have gradually matured. As a foundation reinforcement technology, pile-supported embankments are widely used to construct embankments or other structures on soft soils, swamps, and other soil layers with low bearing capacity. This technology involves placing a certain number of rigid piles in the soft soil foundation, transferring the load of the superstructure through the piles to the deeper, stable soil layer, thereby reducing foundation settlement and improving embankment stability. Compared to other structures, it offers advantages such as reduced settlement, improved stability, accelerated construction progress, and better economic efficiency. In recent years, large areas of my country's highways have faced the need for renovation and renovation of aging highways, as well as the need for highway and bridge expansion. Pile-supported embankments offer significant advantages in terms of bearing capacity, settlement control, construction speed, and road surface elevation.

[0003] At present, pile foundations are used to deal with most soft soil conditions in my country. However, for situations with deep soft soil layers, longer piles and denser pile arrangements are often used, which can bring about some adverse effects:

[0004] First, too close pile spacing may reduce the bearing capacity of the soil between piles, preventing the effective soil arching effect. The soil arching effect is a key load transfer mechanism in pile-supported embankments. It relies on the relative displacement of the soil between the piles and the piles to achieve load redistribution. A reduced role of the soil arching effect will relatively reduce the bearing capacity of the embankment. Second, too dense a pile arrangement will significantly increase the project cost because it requires more pile materials and construction work, which reduces the construction speed. To ensure the bearing capacity of the foundation, many designers use a combination of long and short pile arrangements, pipe piles and concrete mixing piles, to reduce costs. However, the piles still need to be arranged closely to ensure bearing capacity. Too dense piles will produce a large soil squeezing effect. Excessive soil squeezing effect may cause large lateral displacement of the pile body, which is not conducive to the stability of the pile foundation structure. However, if the pile spacing is too large, it will not meet the bearing capacity requirements of the soft soil roadbed, resulting in excessive settlement of the embankment.

[0005] Therefore, a pile-supported embankment that can properly handle deep soft soil layers is needed to solve the problems described above. Utility Model Content

[0006] One of the purposes of this application is to provide a pile-supported embankment for a deep soft soil roadbed, aiming to solve the problem of poor bearing capacity of existing deep soft soil roadbeds.

[0007] The technical solution of this application is:

[0008] A pile-supported embankment for a deep soft soil roadbed comprises a plurality of precast main piles, a plurality of precast auxiliary piles, a plurality of secondary piles and a plurality of connecting oblique beams; the plurality of precast main piles are arranged in a grid pattern in the deep soft soil roadbed; the precast auxiliary piles are respectively connected to two adjacent precast main piles via the connecting oblique beams; the secondary piles are arranged in the foundation of a reinforced area enclosed by the plurality of precast main piles and the plurality of precast auxiliary piles.

[0009] As a technical solution of the present application, the prefabricated main pile includes a main pile cap, a main pile body and multiple assembly platforms; the multiple assembly platforms are respectively arranged on the outer peripheral wall of the main pile body; the main pile cap is arranged on the top of the main pile body; one end of the connecting inclined beam is connected to the assembly platform, and the other end is connected to the secondary pile.

[0010] As a technical solution of the present application, a row of long assembly bars and a row of short assembly bars are arranged at intervals on the assembly table, and the long assembly bars are close to the outer peripheral wall of the main pile body; a row of long assembly holes and a row of short assembly holes are opened at intervals on the bottom of one end of the connecting inclined beam; the long assembly bars are connected to the corresponding long assembly holes, and the short assembly bars are connected to the corresponding short assembly holes.

[0011] As a technical solution of the present application, a first grouting hole is provided at the upper part of one end of the connecting inclined beam, and a first grouting outlet is provided at the lower part; the first grouting hole is respectively connected to the top of the assembly long hole and the top of the assembly short hole, and is used for grouting into the assembly long hole and the assembly short hole; the first grouting outlet is respectively connected to the bottom of the assembly long hole and the bottom of the assembly short hole.

[0012] As a technical solution of the present application, the assembly platform and the connecting oblique beam are connected by cast-in-place concrete blocks, and the cast-in-place concrete blocks are cast together by a row of long reinforcing bars, multiple rows of reinforcing steel bars, and connecting steel bars; the long reinforcing bars are arranged on the top surface of the assembly platform and on the outside of the short assembly bars, and multiple rows of the reinforcing steel bars are arranged in sequence from bottom to top on the side wall of one end of the connecting oblique beam; the long reinforcing bars and the reinforcing steel bars are connected by the connecting steel bars.

[0013] As a technical solution of the present application, the prefabricated auxiliary pile includes an auxiliary pile cap, an auxiliary pile body and a support platform; the auxiliary pile body is arranged on the support platform; the auxiliary pile cap is arranged on the top of the auxiliary pile body; one end of the connecting inclined beam is connected to the prefabricated main pile, and the other end is connected to the support platform.

[0014] As a technical solution of the present application, two rows of assembly steel bars are arranged at intervals on the other end of the connecting inclined beam; two rows of connection holes are opened on the bottom of both ends of the support platform; and the assembly steel bars are connected to the corresponding connection holes.

[0015] As a technical solution of the present application, a second grouting hole is opened at the upper part of both ends of the support platform, and a second slurry outlet hole is opened at the lower part; the second grouting hole is connected with the top of the corresponding connecting hole for grouting into the connecting hole; the second slurry outlet is connected with the bottom of the connecting hole.

[0016] As a technical solution of the present application, the secondary piles include prefabricated pipe piles, CFG piles or concrete mixing piles.

[0017] Beneficial effects of this application:

[0018] (1) This application can effectively solve the problem of excessive soil squeezing effect caused by traditional pile-supported embankments with thick soft soil layers and too small pile spacing to achieve the corresponding bearing capacity by prefabricated main piles and prefabricated auxiliary piles. It can also effectively reduce the problem of excessive lateral displacement of the pile body and the impact on foundation stability.

[0019] (2) This device can effectively reduce the cost of pile materials and improve the economic efficiency of construction by prefabricating main piles and prefabricated auxiliary piles;

[0020] (3) This application uses prefabricated main piles, prefabricated auxiliary piles, and secondary piles to form the main body of the pile foundation. The prefabricated main piles and prefabricated auxiliary piles are connected by assembly, which greatly saves construction time. The shorter length of the prefabricated auxiliary piles can greatly save costs. At the same time, the diversified selection of secondary piles can provide more solutions for the bearing capacity and economic requirements of the foundation, and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the following is a brief introduction to the drawings required for use in the implementation methods. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 Schematic diagram of the connection distribution of prefabricated main piles, prefabricated auxiliary piles, secondary piles and connecting inclined beams provided in an embodiment of the present application;

[0023] Figure 2 Schematic diagram of the assembly of prefabricated main piles and prefabricated auxiliary piles provided in an embodiment of the present application;

[0024] Figure 3Schematic diagram of the connection between the connecting inclined beams provided in the embodiment of the present application and the prefabricated main piles and prefabricated auxiliary piles respectively;

[0025] Figure 4 Schematic diagram of the assembly of prefabricated main piles, prefabricated auxiliary piles and connecting inclined beams provided in an embodiment of the present application;

[0026] Figure 5 Schematic diagram of a pile-supported embankment for a deep soft soil roadbed provided in an embodiment of the present application.

[0027] Icons: 1-precast main pile; 2-precast auxiliary pile; 3-secondary pile; 4-connecting inclined beam; 5-main pile cap; 6-main pile body; 7-assembly platform; 8-assembly of long reinforcement; 9-assembly of short reinforcement; 10-first grouting hole; 11-first grouting outlet; 12-cast-in-place concrete block; 13-reinforcement of long reinforcement; 14-reinforcement of steel bars; 15-auxiliary pile cap; 16-auxiliary pile body; 17-support platform; 18-assembly of steel bars; 19-second grouting hole; 20-second grouting outlet. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of this application, it should be noted that the terms "upper" and "lower" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. These are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0032] In addition, in this application, unless otherwise expressly specified or limited, the phrase "a first feature is above or below a second feature" may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, the phrases "above, above, and above the second feature" may include the first feature being directly above and obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The phrases "below, below, and below the second feature" may include the first feature being directly below and obliquely below the second feature, or simply indicate that the first feature is lower in level than the second feature.

[0033] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0034] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0035] Example:

[0036] Please refer to Figure 1 , with reference Figures 2 to 5 The present application provides a pile-supported embankment for a deep soft soil roadbed, which mainly includes a plurality of precast main piles 1, a plurality of precast auxiliary piles 2, a plurality of secondary piles 3 and a plurality of connecting inclined beams 4; wherein, the plurality of precast main piles 1 are arranged in a grid pattern in the deep soft soil roadbed; at the same time, the precast auxiliary piles 2 are respectively connected to two adjacent precast main piles 1 by connecting inclined beams 4; in addition, the secondary piles 3 are arranged in the foundation where the reinforced area formed by the plurality of precast main piles 1 and the plurality of precast auxiliary piles 2 is located. It should be noted that the precast main piles 1, as the main load-bearing piles of the foundation, are precast pipe piles with good bearing capacity; each precast auxiliary pile 2 is respectively connected to the precast main pile 1 by two connecting inclined beams 4; the secondary piles 3 serve as secondary load-bearing piles of the foundation and as secondary piles to improve the bearing capacity and stability of the foundation. They can be selected according to the actual bearing capacity and economy required by the foundation, such as precast pipe piles, CFG piles, concrete mixing piles, etc. The three types of piles together constitute a pile group, which can fully utilize the bearing capacity advantage of each type of pile, and the prefabricated main piles 1 and secondary piles 3 are constructed at the same time, and the prefabricated auxiliary piles 2 are finally placed.

[0037] Furthermore, the prefabricated main pile 1 includes a main pile cap 5, a main pile body 6 and multiple assembly platforms 7; wherein, in this embodiment, there are four assembly platforms 7, and the multiple assembly platforms 7 are respectively arranged on the outer peripheral wall of the main pile body 6; the main pile cap 5 is arranged on the top of the main pile body 6; one end of the connecting inclined beam 4 is connected to the assembly platform 7, and the other end is connected to the secondary pile 3.

[0038] Specifically, a row of long assembly bars 8 and a row of short assembly bars 9 are spaced apart on the assembly platform 7, with the long assembly bars 8 located near the outer peripheral wall of the main pile body 6. A row of long assembly holes and a row of short assembly holes are spaced apart on the bottom of one end of the connecting inclined beam 4. The long assembly bars 8 are connected to the corresponding long assembly holes, and the short assembly bars 9 are connected to the corresponding short assembly holes. Furthermore, a first grouting hole 10 is provided at the top of one end of the connecting inclined beam 4, and a first grouting outlet 11 is provided at the bottom. The first grouting hole 10 is connected to the top of the long assembly hole and the top of the short assembly hole, respectively, for grouting the long assembly hole and the short assembly hole. The first grouting outlet 11 is connected to the bottom of the long assembly hole and the bottom of the short assembly hole, respectively.

[0039] It should be noted that the assembly platform 7 and the connecting inclined beam 4 are also connected by a cast-in-place concrete block 12, and the cast-in-place concrete block 12 is cast by a row of reinforcing long bars 13, multiple rows of reinforcing steel bars 14, and connecting steel bars; the reinforcing long bars 13 are arranged on the top surface of the assembly platform 7 and are on the outside of the assembly short bars 9, and multiple rows of reinforcing steel bars 14 are arranged in sequence from bottom to top on the side wall of one end of the connecting inclined beam 4; the reinforcing long bars 13 and the reinforcing steel bars 14 are connected by connecting steel bars.

[0040] Furthermore, the prefabricated auxiliary pile 2 includes an auxiliary pile cap 15, an auxiliary pile body 16, and a support platform 17. The auxiliary pile body 16 is mounted on the support platform 17. The auxiliary pile cap 15 is mounted on top of the auxiliary pile body 16. Two rows of assembly steel bars 18 are spaced apart on the other end of the connecting inclined beam 4. Two rows of connection holes are formed at the bottom of each end of the support platform 17. The assembly steel bars 18 are connected to the corresponding connection holes. In addition, second grouting holes 19 are formed at the upper portion of each end of the support platform 17, and second grouting holes 20 are formed at the lower portion of each end of the support platform 17. The second grouting holes 19 are connected to the top of the corresponding connection hole for grouting into the connection hole. The second grouting outlet is connected to the bottom of the connection hole.

[0041] It should be noted that the main pile body 6 and the assembly platform 7 are directly shipped to the site after being prefabricated in the factory; the main pile cap 5 can be prefabricated or cast in place, and the specific choice can be made by comprehensively considering the economy and construction period; the connecting inclined beam 4, the support platform 17, and the auxiliary pile body 16 are all directly shipped to the site for assembly after being prefabricated in the factory, and the auxiliary pile cap 15 and the main pile cap 5 can be made using the same manufacturing method.

[0042] For embankments that need to be raised, the main pile body 6 is driven into the soil until it reaches the depth of the assembly platform 7, so that it can be assembled with the prefabricated auxiliary piles 2, secondary piles 3 and connecting inclined beams 4 respectively. At this time, no further excavation is required. For embankments that do not need to be raised, the main pile body 6 needs to be driven into the soil and reach the assembly platform 7 before the main pile body 6 is completely driven into the soil. Due to the presence of the prefabricated auxiliary piles 2, the pile spacing of the prefabricated main piles 1 can be appropriately increased compared to the pile spacing of traditional pile foundations, reducing the number of piles arranged and thus reducing costs. Moreover, since the prefabricated auxiliary piles 2 do not need to be driven into the soil, only backfilling and covering are required, the piling space can be significantly reduced, the disturbance to the original geological conditions can be reduced, and the adverse effects of the soil squeezing effect can be reduced. At the same time, since the prefabricated auxiliary piles 2 are relatively short, they can further reduce costs.

[0043] It should be noted that the connection method of the prefabricated main pile 1 and the prefabricated auxiliary pile 2 is as follows: Figure 3 As shown, after all the prefabricated main piles 1 are driven into the ground, the connecting inclined beam 4 is connected to the assembly platform 7 through the long assembling bars 8 and the short assembling bars 9 on the assembly platform 7. A row of long assembling holes and a row of short assembling holes are provided at intervals on the bottom of one end of the prefabricated connecting inclined beam 4. After the connecting inclined beam 4 is connected to the long assembling bars 8 and the short assembling bars 9 through the long assembling holes and the short assembling holes and is installed on the prefabricated main pile 1, it needs to be supported and stabilized. After support, grouting is performed through the first grouting hole 10 on the connecting inclined beam 4. Then, the cement slurry overflowing from the first grouting outlet 11 on the connecting inclined beam 4 is cleaned, and the gap between the connecting inclined beam 4 and the assembly platform 7 is sealed and the excess cement slurry is cleaned. At the same time, the long assembling bars 8 are arranged at the outside of the assembly platform 7 and the short assembling bars 9 are arranged at the inside of the assembly platform 7. This design can enhance the bending resistance of the connection between the connecting inclined beam 4 and the prefabricated main pile 1, making the overall structure less susceptible to damage such as concrete cracking and steel bar collapse caused by excessive bending moment. The reinforcement steel bars 14 on the connecting inclined beam 4 and the reinforcement long bars 13 on the assembly platform 7 are bundled with steel bars. After the bundling is completed, the mold is placed for cast-in-place grouting. The grouting is completed to form Figure 4 The concrete blocks 12 are cast in situ at the connection points to enhance the stability and bearing capacity of the assembled structure. After the main body of the two connecting oblique beams 4 is assembled, the support platform 17 on the prefabricated auxiliary pile 2 is installed on the connecting oblique beam 4 by assembling the steel bars 18. After the installation is completed, grouting is carried out through the second grouting hole 19 on the support platform 17. The cement slurry overflowing from the second grouting hole 20 on the support platform 17 is cleaned, and then the gap between the two connecting oblique beams 4 and the gap between the support platform 17 and the main body of the connecting oblique beam are sealed with grouting; finally, the prefabricated auxiliary pile 2 is placed on the support platform 17, and the auxiliary pile cap 15 is made in an appropriate manner. After the structure is stable, the support is removed. The overall schematic diagram of the unit structure is shown in FIG. Figure 5After the pile foundation is completed, the area between the piles and the area above the pile caps are filled with earth to construct the pile-supported embankment.

[0044] Take a simple highway widening and heightening project as an example, the cross-section diagram is as follows Figure 5 As shown in the figure, the original four-lane highway was expanded to eight lanes in both directions to meet traffic requirements. Due to engineering requirements, the highway's longitudinal section needed to be raised. As shown in the figure, L1 represents the original embankment width, and L2 represents the width of the newly added embankment. Retaining walls were used to prevent significant lateral displacement of the original embankment caused by slope excavation. Alternatively, the slope could be excavated using a stepped excavation method. After slope treatment, the prefabricated primary piles 1 of the new pile foundation were driven, followed by the secondary piles 3, and finally the prefabricated auxiliary piles 2 were assembled. Since the prefabricated auxiliary piles 2 did not require driving, construction costs were significantly reduced. Furthermore, the new pile foundations were completed with a higher pile top height than the original embankment piles. After the pile foundations were assembled, backfill was performed, and the superstructure was then constructed based on actual conditions. Overall, this method is relatively simple and efficient for embankment widening. It also raises the pile top plane, meeting the embankment height requirement.

[0045] It should be noted that the present application involves geotechnical engineering fields such as highway widening and heightening, bridges, and foundation pits. The pile-supported embankment in the present application is mainly designed for geological conditions containing deep soft soil layers. Compared with the traditional pile-supported embankment for treating deep soft soil roadbeds by driving more and deeper piles, the present application is more economical and saves construction time while ensuring the bearing capacity of the foundation. The prefabricated structure ensures the speed of construction, and the combination of three different pile types provides more solutions for the bearing capacity and economic requirements of the foundation. At the same time, due to The presence of the prefabricated auxiliary piles 2 reduces the damage to the stable soil of the original roadbed and reduces the harm of the soil squeezing effect. The prefabricated auxiliary piles 2 and the prefabricated main piles 1 both use prefabricated pipe piles with higher strength, ensuring that after the prefabricated auxiliary piles 2 are subjected to force, the load is transferred to the prefabricated main piles 1 through the connecting inclined beams 4, and the prefabricated main piles 1 can avoid large settlement. In addition, the connection between the prefabricated main piles 1 and the prefabricated auxiliary piles 2 makes the structure have better integrity, can resist the differential settlement of the soil between the piles caused by the differential settlement between the pile foundations, and ensure the stability of the road structure. This application is particularly suitable for road widening and heightening conditions. Under such conditions, the road does not need to be excavated, and only piles need to be driven and backfilled, which is more economical and time-saving.

[0046] It should be noted that the traditional method of treating deep soft soil layers often involves driving more and denser piles to meet the foundation bearing capacity requirements. This construction method will result in a large soil squeezing effect between the soil between the piles and the piles, causing the piles to shift laterally. In this application, the prefabricated main piles 1 and prefabricated auxiliary piles 2 can effectively solve the problem of excessive soil squeezing caused by the traditional pile-supported embankment that uses too dense piles and too small pile spacing to achieve the corresponding bearing capacity. This can effectively reduce the problem of excessive lateral displacement of the piles and the impact on foundation stability. In addition, the traditional pile-supported embankment with densely arranged piles consumes a large number of piles, resulting in a large consumption of pile materials and a significant increase in construction costs. In this application, the prefabricated main piles 1 and prefabricated auxiliary piles 2 can effectively reduce the cost of pile materials and improve the economy of construction. In addition, there are mostly two solutions for traditional pile-supported embankments to deal with deep soft soil conditions. One is to drive denser prefabricated pipe piles, which reduces the construction period but increases a lot of costs; the other is to drive denser CFG piles or concrete mixing piles, which reduces costs but increases a lot of construction time. In the present application, the pile foundation body is composed of prefabricated main piles 1, prefabricated auxiliary piles 2, and secondary piles 3. The prefabricated main piles 1 and prefabricated auxiliary piles 2 are connected by assembly, which greatly saves construction time. The shorter length of the prefabricated auxiliary piles 2 can greatly save costs. At the same time, the diversified selection of secondary piles 3 can provide more solutions for the bearing capacity and economic needs of the foundation, and has a wider range of applications.

[0047] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A pile-supported embankment for a deep soft soil roadbed, characterized in that: It includes multiple prefabricated main piles, multiple prefabricated auxiliary piles, multiple secondary piles and multiple connecting inclined beams; the multiple prefabricated main piles are arranged in a grid pattern in a deep soft soil roadbed; the prefabricated auxiliary piles are respectively connected to two adjacent prefabricated main piles through the connecting inclined beams; the secondary piles are arranged in the foundation where the reinforced area is located which is jointly enclosed by the multiple prefabricated main piles and the multiple prefabricated auxiliary piles.

2. The pile-supported embankment for deep soft soil roadbed according to claim 1, characterized in that: The prefabricated main pile includes a main pile cap, a main pile body and multiple assembly platforms; the multiple assembly platforms are respectively arranged on the outer peripheral wall of the main pile body; the main pile cap is arranged on the top of the main pile body; one end of the connecting inclined beam is connected to the assembly platform, and the other end is connected to the secondary pile.

3. The pile-supported embankment for deep soft soil roadbed according to claim 2, characterized in that: A row of long assembly bars and a row of short assembly bars are arranged at intervals on the assembly platform, and the long assembly bars are close to the outer peripheral wall of the main pile body; a row of long assembly holes and a row of short assembly holes are opened at intervals on the bottom of one end of the connecting inclined beam; the long assembly bars are connected to the corresponding long assembly holes, and the short assembly bars are connected to the corresponding short assembly holes.

4. The pile-supported embankment for deep soft soil roadbed according to claim 3, characterized in that: A first grouting hole is provided at the upper part of one end of the connecting inclined beam, and a first grouting outlet is provided at the lower part; the first grouting hole is respectively connected to the top of the assembly long hole and the top of the assembly short hole, and is used for grouting into the assembly long hole and the assembly short hole; the first grouting outlet is respectively connected to the bottom of the assembly long hole and the bottom of the assembly short hole.

5. The pile-supported embankment for deep soft soil roadbed according to claim 3, characterized in that: The assembly platform and the connecting oblique beam are connected by cast-in-place concrete blocks, and the cast-in-place concrete blocks are cast together by a row of long reinforcing bars, multiple rows of reinforcing steel bars, and connecting steel bars; the long reinforcing bars are arranged on the top surface of the assembly platform and are located on the outside of the short assembly bars, and multiple rows of the reinforcing steel bars are arranged in sequence from bottom to top on the side wall of one end of the connecting oblique beam; the long reinforcing bars and the reinforcing steel bars are connected by the connecting steel bars.

6. The pile-supported embankment for deep soft soil roadbed according to claim 1, characterized in that: The prefabricated auxiliary pile includes an auxiliary pile cap, an auxiliary pile body and a support platform; the auxiliary pile body is arranged on the support platform; the auxiliary pile cap is arranged on the top of the auxiliary pile body; one end of the connecting inclined beam is connected to the prefabricated main pile, and the other end is connected to the support platform.

7. The pile-supported embankment for deep soft soil roadbed according to claim 6, characterized in that: Two rows of assembly steel bars are arranged at intervals on the other end of the connecting oblique beam; two rows of connection holes are opened on the bottom of both ends of the support platform; and the assembly steel bars are connected to the corresponding connection holes.

8. The pile-supported embankment for deep soft soil roadbed according to claim 7, characterized in that: A second grouting hole is provided at the upper part of both ends of the support platform, and a second slurry outlet is provided at the lower part; the second grouting hole is connected to the top of the corresponding connecting hole for grouting into the connecting hole; the second slurry outlet is connected to the bottom of the connecting hole.

9. The pile-supported embankment for deep soft soil roadbed according to claim 1, characterized in that: The secondary piles include prefabricated pipe piles, CFG piles or concrete mixing piles.

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