Rigid pile and composite foundation

Abstract

The utility model discloses a rigid pile and a composite foundation, the composite foundation comprises a solidified soil layer and at least two rigid piles, and the rigid piles are distributed on the solidified soil layer in an array mode. The rigid pile is arranged on a solidified soil layer and comprises a prefabricated pipe, a first pile body, a first pile cap cover plate and at least three force transmission plates, and the two ends of the prefabricated pipe are through. The force transmission plates are arranged on the outer side of the prefabricated pipe and distributed on the outer side wall of the prefabricated pipe in the circumferential direction at intervals. One end of the first pile body is located on the prefabricated pipe, and the other end of the first pile body extends into a foundation. The first pile cap cover plate is arranged at the top of the prefabricated pipe and connected with the first pile body.

Description

Technical Field

[0001] This application relates to the field of civil engineering technology, and in particular to a rigid pile and composite foundation. Background Technology

[0002] To address the stability and post-construction settlement issues when building high-grade roads in soft soil sections, foundation treatment is generally required. Common foundation treatment methods include replacement, preloading, and composite foundations using cement-mixing piles. Conventional replacement methods have a treatment depth of up to 3 meters, while preloading, cement-mixing piles, high-pressure jet grouting, and gravel piles typically have a treatment depth of no more than 20-25 meters. For deep soft soil foundations exceeding 25 meters, conventional foundation treatment methods are insufficient.

[0003] To ensure the quality of soft soil foundation treatment, rigid piles such as CFG piles, plain concrete piles, and prestressed pipe piles are increasingly used in engineering projects to treat deep soft soil foundations. This fully leverages the advantages of rigid piles, such as high single pile bearing capacity, large treatment depth, reliable pile quality, fast construction speed, and ease of testing.

[0004] However, in recent years, when using rigid piles such as prestressed pipe piles and CFG piles to treat soft soil foundations for roads, the pile drivers are quite tall (generally greater than 20m). In road sections with limited clearance, such as under high-voltage lines or bridges (generally with clearance less than 10-15m), conventional CFG piles and prestressed pipe piles cannot be used for composite foundations. For conventional road sections with limited clearance, high-pressure jet grouting piles with smaller pile drivers are used. However, high-pressure jet grouting piles have a significant impact on surrounding bridge piers, and the treatment depth is generally no more than 20m.

[0005] If conventional bored piles are used, the pile diameter is generally greater than 0.8m, resulting in high costs and difficulty in coordinating pile-soil settlement. Under long-term loads, problems such as pile cap tilting and pile cap detachment also occur. Especially in low-fill sections, mushroom-shaped bulges appear on the road surface, affecting driving comfort and safety. Utility Model Content

[0006] To solve at least one of the above-mentioned technical problems, this application provides a rigid pile and a composite foundation, and the technical solution adopted is as follows.

[0007] The composite foundation provided in this application includes a solidified soil layer and at least two rigid piles, with an array of rigid piles distributed in the solidified soil layer.

[0008] The rigid pile provided in this application is arranged in a solidified soil layer. The rigid pile includes a precast pipe, a first pile body, a first pile cap plate, and at least three force transmission plates. The two ends of the precast pipe are connected. The force transmission plates are disposed on the outside of the precast pipe, and the force transmission plates are distributed circumferentially at intervals on the outer wall of the precast pipe. One end of the first pile body is located on the precast pipe, and the other end of the first pile body extends into the foundation. The first pile cap plate is disposed on the top of the precast pipe and is connected to the first pile body.

[0009] This application has at least the following beneficial effects: The use of precast pipes as casings for the first pile body construction ensures the stability of the first pile body construction. Furthermore, the precast pipes and force transfer plates provide good support for the first pile cap plate, thereby forming a composite foundation with multiple rigid piles and avoiding problems such as mushroom-shaped roads, pile cap tilting, and pile cap detachment. This application can be widely applied in the field of civil engineering technology.

[0010] In some embodiments of this application, one end of the first pile body located on the precast pipe is configured as a large-diameter end.

[0011] In some embodiments of this application, the first pile body is configured as a bored cast-in-place pile, and the first pile cap plate is connected to the first pile body by means of steel bar binding and concrete pouring.

[0012] In some embodiments of this application, a reinforcing cage is provided on one end of the precast pipe on the first pile body, the top of the reinforcing cage is higher than the top of the precast pipe, and the reinforcing cage is tied to the reinforcing bars of the first pile cap plate.

[0013] In some embodiments of this application, the precast tube is configured as a circular tube, and the force transmission plates are distributed at equal intervals along the circumference of the outer side wall of the precast tube.

[0014] The rigid pile provided in this application is arranged in a solidified soil layer. The rigid pile includes a precast support, a second pile body, and a second pile cap plate. The precast support includes an inner ring support structure and an outer ring support structure arranged concentrically. The outer side wall of the inner ring support structure is installed with the outer ring support structure through at least two connecting arms. The second pile body is configured as a bored pile or a prestressed pipe pile. One end of the second pile body is located in the inner ring support structure, and the other end of the second pile body extends into the foundation. The second pile cap plate is disposed on the top of the precast support, and the side of the second pile cap plate facing the precast support is connected to the inner ring support structure.

[0015] This application has at least the following beneficial effects: By setting precast support components and a second pile cap plate, the rigid pile solves problems such as the stability of the top of the second pile body and the coordinated settlement of the soil between piles. The precast support components constrain the second pile body, preventing it from tilting, and can also serve as a support for the second pile cap plate. This application can be widely applied in the field of civil engineering technology.

[0016] In some embodiments of this application, a boss is provided on the side of the second pile cap plate facing the prefabricated support member, and the boss is embedded in the inner ring support structure.

[0017] In some embodiments of this application, the second pile cap plate is provided as a rectangular plate, and the boss is provided as a cylindrical boss.

[0018] In some embodiments of this application, the second pile body is configured as a prestressed pipe pile, and the gap between the outer wall of the second pile body and the inner wall of the inner ring support structure is filled with concrete.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The present application will be further illustrated below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments illustrated in the following drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

[0021] Figure 1 This is a structural diagram of a rigid pile in some embodiments of this application.

[0022] Figure 2 This is a structural diagram of a prefabricated support member in some embodiments of this application.

[0023] Figure 3 This is a schematic diagram of the construction process of rigid piles in some embodiments of this application.

[0024] Figure 4 This is a schematic diagram showing the distribution of rigid piles on a composite foundation in some embodiments of this application.

[0025] Figure 5 This is a structural diagram of a rigid pile in some embodiments of this application.

[0026] Reference numerals: Precast support component 1100; Inner ring support structure 1101; Outer ring support structure 1102; Connecting arm 1103; Second pile body 1200; Second pile cap plate 1300; Precast pipe 2100; Force transmission plate 2200; First pile body 2300; First pile cap plate 2400. Detailed Implementation

[0027] The following is combined with Figures 1 to 5 The embodiments of this application are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0028] In the description of this application, it should be understood that the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] This application relates to a composite foundation comprising a solidified soil layer and at least two rigid piles, wherein an array of rigid piles is distributed in the solidified soil layer.

[0033] Furthermore, since the foundation is a soft soil section, it is necessary to solidify the surface layer of the foundation to obtain a solidified soil layer.

[0034] Other components and operations of composite foundations are already described in the relevant technology for those skilled in the art, and will not be described in detail here. The structure of rigid piles will be introduced below.

[0035] This application relates to a rigid pile, which includes a precast pipe 2100, a force transmission plate 2200, a first pile body 2300, and a first pile cap plate 2400. The precast pipe 2100 has two through-holes. The precast pipe 2100 and the force transmission plate 2200 are disposed in a solidified soil layer, with the force transmission plate 2200 disposed on the outside of the precast pipe 2100. The precast pipe 2100 and the force transmission plate 2200 form the top support of the rigid pile. The first pile cap plate 2400 is disposed on the top of the precast pipe 2100, and is in contact with the top of the precast pipe 2100, the force transmission plate 2200, and the solidified soil layer.

[0036] One end of the first pile body 2300 is located at the precast pipe 2100, and the first pile cap plate 2400 is connected to the first pile body 2300. The other end of the first pile body 2300 extends into the foundation. Specifically, the top of the first pile body 2300 is located at the center of the precast pipe 2100, the first pile cap plate 2400 is connected to the top of the first pile body 2300, and the bottom of the first pile body 2300 extends to the bearing layer. The precast pipe 2100, the force transmission plate 2200, the first pile body 2300, the first pile cap plate 2400, and the solidified soil layer form a composite foundation with rigid piles, achieving the purpose of soft soil treatment in road sections with limited clearance.

[0037] Understandably, at least three force transmission plates 2200 are provided, with each force transmission plate 2200 distributed circumferentially at intervals on the outer side wall of the precast pipe 2100. In some examples, four force transmission plates 2200 are provided.

[0038] It should be noted that one end of the force transmission plate 2200 contacts the outer wall of the precast pipe 2100, and the upper side of the force transmission plate 2200 is flush with the top of the precast pipe 2100. As a reinforcing component in the solidified soil layer, the force transmission plate 2200 coordinates and reinforces the consistency of the overall settlement of the solidified soil layer.

[0039] In some examples, the force transmission plate 2200 is a precast structure, made of cast concrete, and reinforced with steel bars.

[0040] In some examples, the force transmission plate 2200 is set as a rectangular plate.

[0041] In some embodiments, the precast tube 2100 is a circular tube, and the force transmission plate 2200 is arranged radially along the precast tube 2100. When there are at least two force transmission plates 2200, the force transmission plates 2200 are distributed at equal intervals along the circumference on the outer side wall of the precast tube 2100.

[0042] The precast pipe 2100 is integrally cast from concrete. The length of the precast pipe 2100 is less than the depth of the solidified soil layer to ensure that the bottom of the precast pipe 2100 is located in the solidified soil layer.

[0043] In some embodiments, one end of the first pile body 2300 located on the precast pipe 2100 is set as a large-diameter end, and the large-diameter end of the pile top of the first pile body 2300 is formed into a cylindrical shape by concrete pouring.

[0044] The first pile body 2300 is configured as a bored cast-in-place pile, and a reinforcing cage is installed at one end of the precast pipe 2100 on the first pile body 2300. The reinforcing cage is positioned before concrete pouring, and forms a large-diameter end at the top of the first pile body 2300 after concrete pouring. Specifically, the reinforcing cage is located at the top of the first pile body 2300, and no reinforcing cage is installed in the middle and lower parts of the first pile body 2300.

[0045] In some embodiments, the first pile cap 2400 is connected to the first pile body 2300 by means of steel bar binding and concrete pouring.

[0046] The first pile cap plate 2400 is set as a cast-in-place reinforced concrete structure. The steel cage of the first pile body 2300 is tied to the steel bars of the first pile cap plate 2400, thereby realizing the connection between the first pile body 2300 and the first pile cap plate 2400.

[0047] Specifically, the top of the reinforcing cage is higher than the top of the precast pipe 2100. Anchoring steel bars are used to form the reinforcing steel skeleton of the first pile cap plate 2400 on the top of the precast pipe 2100. After the reinforcing cage at the top of the first pile body 2300 is tied to the reinforcing steel of the first pile cap plate 2400, concrete is poured.

[0048] It should be noted that after the concrete is poured at the top of the first pile body 2300, once the concrete strength reaches 80% of the design strength, the loose surface concrete is removed, and then the reinforcing cage can be tied to the reinforcing bars of the first pile cap plate 2400.

[0049] In some examples, the first pile cap 2400 is set as a circular cap.

[0050] In some examples, the pile cap column head reinforcement of the first pile cap plate 2400 is arranged in a ring, using the main reinforcement of the pre-embedded "π" type steel cage to tie the circumferential stressed reinforcement. The core part of the pile cap is equipped with a stressed reinforcement mesh.

[0051] Based on the structure of the rigid piles described above, the construction process of the composite foundation will be introduced below.

[0052] (1) Construction of solidified soil

[0053] A powerful mixing machine is used to vigorously mix the surface layer of the foundation within a set depth range, and a curing agent is added.

[0054] (2) Press in the precast pipe 2100 and the force transmission plate 2200.

[0055] After the in-situ soil consolidation construction has been completed for the set time, the position of the rigid pile is measured. Taking advantage of the low early strength of the soil layer, the precast pipe 2100 is aligned with the pile position of the first pile body 2300, the precast pipe 2100 is pressed into the soil layer, and the force transmission plate 2200 is pressed into the outside of the precast pipe 2100 to ensure that the precast pipe 2100, the force transmission plate 2200 and the soil layer are flush.

[0056] (3) Drilled pile construction

[0057] After the solidified soil layer construction has been completed for a set period of time, when the compressive strength or bearing capacity of the solidified soil layer is greater than the set value, the construction of bored piles can be carried out. The precast pipe 2100 is used as a casing, and mud circulation ditches, mud pits, and sedimentation tanks are excavated to provide conditions for the construction of bored piles.

[0058] (4) Tying the pile cap reinforcement

[0059] Organize the working surface of the pile top and the precast pipe 2100, ensuring that the pile top is lower than the top of the precast pipe 2100, and level the solidified soil layer outside the precast pipe 2100.

[0060] (5) Pouring pile cap concrete

[0061] (6) Subgrade filling construction

[0062] After the pile cap construction is completed, the roadbed filling construction will begin.

[0063] As can be seen from the above construction process, the foundation is solidified on the spot to form a whole, which has a restraining effect on the precast pipe 2100 and the force transmission plate 2200, avoiding uneven settlement of the pile and soil, and avoiding problems such as uncoordinated settlement of the soil between the piles.

[0064] Both the precast pipe 2100 and the force transmission plate 2200 are precast structures, ensuring reliable quality and shortening the construction period. The first pile body 2300 is constructed by on-site casting, eliminating soil displacement during construction and minimizing the impact on the surrounding area.

[0065] It fully utilizes the advantages of bored piles, such as fast construction speed, controllable quality, high single pile bearing capacity, and small post-construction settlement. It also fully leverages the high bearing capacity of bored piles by using large pile caps and large-spacing rigid piles to reduce the cost of soft soil treatment.

[0066] The precast pipe 2100, force transmission plate 2200 and solidified soil layer fully exert the effect of in-situ solidification, so as to coordinate the settlement of the pile and the soil between the piles and avoid phenomena such as pile cap tilting and pile cap detachment.

[0067] The composite foundation in this application makes full use of the soft soil layer without an overburden layer. The soft soil layer is treated in situ using in-situ solidification technology, which reduces the impact of abandoning and transporting the soft soil on the external environment. At the same time, it avoids purchasing expensive crushed stone and sand materials, thus saving engineering costs.

[0068] After the on-site curing construction, the precast pipe 2100 and force transmission plate 2200, which are promptly buried, can serve two purposes: firstly, the precast pipe 2100 can be used as a protective casing for the construction of the first pile body 2300, ensuring the stability of the borehole opening; secondly, it can provide good support for the pile cap of the first pile body 2300.

[0069] This application relates to a rigid pile, which includes a precast support member 1100, a second pile body 1200, and a second pile cap plate 1300. The precast support member 1100 is disposed on a solidified soil layer and serves as the top support of the rigid pile. The second pile cap plate 1300 is disposed on top of the precast support member 1100. One end of the second pile body 1200 is located on the precast support member 1100, and the second pile body 1200 is connected to the second pile cap plate 1300. The other end of the second pile body 1200 extends into the foundation.

[0070] Furthermore, the prefabricated support member 1100 includes a concentrically arranged inner ring support structure 1101 and an outer ring support structure 1102. Both the inner ring support structure 1101 and the outer ring support structure 1102 are circular in shape and arranged concentrically. The outer side wall of the inner ring support structure 1101 and the outer ring support structure 1102 are connected by at least two connecting arms 1103. Specifically, the connecting arms 1103 are arranged radially along the inner ring support structure 1101 and the outer ring support structure 1102. One end of the connecting arm 1103 is connected to the inner ring support structure 1101, and the other end of the connecting arm 1103 is connected to the outer ring support structure 1102.

[0071] The side of the second pile cap 1300 facing the precast support 1100 is connected to the inner ring support structure 1101, and one end of the second pile body 1200 is located in the inner ring support structure 1101. Specifically, the top of the second pile body 1200 is located in the inner ring support structure 1101, the top of the second pile body 1200 is lower than the top of the inner ring support structure 1101, and the bottom of the second pile body 1200 extends to the bearing layer. Furthermore, the lower side of the second pile cap 1300 is connected to the inner ring support structure 1101, and the inner ring support structure 1101 has a restraining effect on the second pile cap 1300, preventing the rigid pile from tilting under external forces.

[0072] It should be noted that the composite foundation solves the problems of top stability of rigid piles and coordinated settlement of soil between piles by setting up prefabricated support components 1100 and second pile cap plates 1300, thus avoiding problems such as mushroom-shaped roads, pile cap tilting, and pile cap detachment caused by excessively low backfill during rigid pile construction.

[0073] In some embodiments, the second pile body 1200 is configured as a prestressed pipe pile, and the gap between the outer wall of the second pile body 1200 and the inner wall of the inner ring support structure 1101 is filled with concrete.

[0074] It is understandable that the outer wall of the second pile body 1200 and the inner wall of the inner ring support structure 1101 are filled with concrete to ensure that the top of the second pile body 1200 does not deform.

[0075] It should be noted that the filling concrete must also ensure that the top of the second pile body 1200 is lower than the top of the inner ring support structure 1101 in order to install the second pile cap plate 1300.

[0076] In some implementations, the second pile body 1200 is configured as a bored pile.

[0077] In some embodiments, a boss is provided on the side of the second pile cap 1300 facing the precast support 1100, and the boss is embedded in the inner ring support structure 1101. The boss serves to position the pile cap, transmit vertical force, and constrain the deformation of the pile cap.

[0078] Furthermore, the second pile cap plate 1300 is set as a precast concrete structure.

[0079] In some examples, the second pile cap 1300 is provided with a rectangular plate, forming a square shape with a large bearing area.

[0080] Understandably, the boss is set as a cylindrical boss to fit the shape of the inner ring support structure 1101.

[0081] It should be noted that when the second pile cap plate 1300 is prefabricated, a lifting ring steel bar is pre-embedded in the steel reinforcement cage of the pile cap to facilitate the lifting and installation of the finished second pile cap plate 1300.

[0082] In some embodiments, the precast support 1100 is set as a precast concrete structure, and the inner ring support structure 1101, the outer ring support structure 1102 and the connecting arm 1103 are all provided with steel reinforcement skeletons. The steel reinforcement skeletons of the three are connected to form a whole, and then the concrete is poured to form a single piece.

[0083] Between the outer sidewall of the inner ring support structure 1101 and the inner sidewall of the outer ring support structure 1102, connecting arms 1103 are arranged at intervals along the circumferential direction. Furthermore, the connecting arms 1103 are distributed at equal intervals.

[0084] In some examples, the tops of the inner ring support structure 1101, the outer ring support structure 1102, and the connecting arm 1103 are at the same height.

[0085] In some examples, four connecting arms 1103 are provided.

[0086] Based on the structure of the rigid piles described above, the construction process of the composite foundation will be introduced below.

[0087] (1) Construction preparation

[0088] Carry out surface clearing, water pumping, drying and leveling operations, prepare the curing construction machinery and materials, and prepare the second pile body 1200, precast support component 1100 and second pile cap plate 1300.

[0089] (2) Construction of solidified soil

[0090] A powerful mixing machine is used to vigorously mix the surface layer of the foundation within a set depth range, and a curing agent is added.

[0091] In-situ curing is carried out in sections and blocks.

[0092] (3) Press in the precast support component 1100

[0093] After the in-situ solidification of the soil layer is completed within the set time, the position of the rigid pile is measured. Taking advantage of the low early strength of the solidified soil layer, the precast support 1100 is aligned with the pile position of the second pile body 1200, and the precast support 1100 is pressed into the solidified soil layer to ensure that the top of the outer ring support structure 1102 is flush with the surface of the solidified soil layer.

[0094] (4) Construction preparation for the second pile body 1200

[0095] After the solidified soil layer construction has been completed for a set period of time, if the compressive strength or bearing capacity of the solidified soil layer is greater than the set value, the construction of the second pile body 1200 can be carried out, the soil in the inner ring support structure 1101 can be cleared, and the position of the rigid pile can be measured and laid out again.

[0096] If the second pile body 1200 is a bored cast-in-place pile, then the inner ring support structure 1101 is used as a casing, and mud circulation trenches, mud pits, and sedimentation tanks are excavated to provide conditions for the construction of bored cast-in-place piles.

[0097] (5) Construction of the second pile body at 1200 mm

[0098] When the second pile body (1200mm) is a prestressed pipe pile, the prestressed pipe pile is a displacement pile, and it is constructed using static pressure or hammer driving. When the site bearing capacity is low, hammer driving is preferred. Align the prestressed pipe pile with the center of the pile location and drive it into the designed soil layer or design depth using a hammer.

[0099] When the second pile body 1200 is a bored cast-in-place pile, which is a non-displacement pile and has little impact on the surrounding area, a small drilling rig is used to drill the hole at the center of the pile location. After drilling to the designed soil layer or design depth, the pile body concrete is poured and the pile cap anchoring steel bars are pre-embedded.

[0100] (6) Clean the 1100 working surface of the precast support component.

[0101] After the second pile body 1200 is constructed, the pile head of the second pile body 1200 and the working surface of the precast support component 1100 are prepared, with the working surface located at the top of the precast support component 1100. Ensure that the pile head of the second pile body 1200 is lower than the top of the inner ring support structure 1101, and compact the gap between the pile body of the second pile body 1200 and the inner ring support structure 1101. Level the solidified soil layer between the outer wall of the inner ring support structure 1101 and the inner wall of the outer ring support structure 1102.

[0102] It should be noted that, in the case where the second pile body 1200 is a prestressed pipe pile, the top of the pipe pile should be sealed first. Specifically, the top of the pipe pile is sealed with a steel plate. After the preparation is completed, concrete is poured to fill the gap between the pile body and the inner ring support structure 1101, so that the concrete between the pipe pile and the inner ring support structure 1101 is filled and vibrated to make it dense.

[0103] (7) Install the second pile cap plate 1300

[0104] Clean and compact the reinforcing soil in the precast support component 1100, and level and compact the solidified soil layer outside the precast support component 1100 and under the second pile cap plate 1300.

[0105] The second pile cap plate 1300 is installed using lifting equipment, and the boss of the second pile cap plate 1300 is embedded into the inner ring support structure 1101.

[0106] (8) Subgrade filling construction

[0107] After the second pile cap plate 1300 was completed, the roadbed filling construction was carried out.

[0108] As can be seen from the above construction process, the surface soil is solidified in situ to form a whole, which has a restraining effect on the precast support component 1100, avoiding uneven settlement of the pile and soil, and also avoiding the problem of uncoordinated settlement of the soil between piles.

[0109] In this application, both the precast support component 1100 and the second pile cap plate 1300 are made of precast concrete, which improves the efficiency of on-site construction and saves construction time. On the other hand, the quality of the precast concrete structure is reliable and guaranteed.

[0110] The construction of the composite foundation and rigid piles in this application fully utilizes the advantages of prestressed pipe piles, such as fast construction speed, controllable quality, high single pile bearing capacity, and small post-construction settlement.

[0111] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A rigid pile, characterized in that: The rigid piles are arranged in the solidified soil layer, and the rigid piles include A precast pipe, wherein both ends of the precast pipe are connected; At least three force transmission plates are disposed on the outside of the precast tube, and the force transmission plates are distributed circumferentially at intervals on the outer side wall of the precast tube. The first pile body has one end located at the precast pipe and the other end extending into the foundation. The first pile cap plate is disposed on the top of the precast pipe and is connected to the first pile body.

2. The rigid pile according to claim 1, characterized in that: The first pile body has a large-diameter end located at one end of the precast pipe.

3. The rigid pile according to claim 1 or 2, characterized in that: The first pile body is configured as a bored cast-in-place pile, and the first pile cap plate is connected to the first pile body by means of steel reinforcement binding and concrete pouring.

4. The rigid pile according to claim 3, characterized in that: A reinforcing cage is provided on one end of the precast pipe on the first pile body. The top of the reinforcing cage is higher than the top of the precast pipe, and the reinforcing cage is tied to the reinforcing bars of the first pile cap plate.

5. The rigid pile according to claim 1, characterized in that: The precast tube is a circular tube, and the force transmission plates are distributed at equal intervals along the circumference of the outer wall of the precast tube.

6. A rigid pile, characterized in that: The rigid piles are arranged in the solidified soil layer, and the rigid piles include A prefabricated support component, comprising an inner ring support structure and an outer ring support structure arranged concentrically, wherein the outer side wall of the inner ring support structure is connected to the outer ring support structure by at least two connecting arms. The second pile body is configured as a prestressed pipe pile, with one end of the second pile body located in the inner ring support structure and the other end of the second pile body extending into the foundation. The second pile cap plate is disposed on the top of the precast support member, and the side of the second pile cap plate facing the precast support member is connected to the inner ring support structure.

7. The rigid pile according to claim 6, characterized in that: The second pile cap plate has a boss on the side facing the prefabricated support member, and the boss is embedded in the inner ring support structure.

8. The rigid pile according to claim 7, characterized in that: The second pile cap plate is provided with a rectangular plate, and the boss is provided with a cylindrical boss.

9. The rigid pile according to any one of claims 6 to 8, characterized in that: The second pile body is configured as a prestressed pipe pile, and the gap between the outer wall of the second pile body and the inner wall of the inner ring support structure is filled with concrete.

10. A composite foundation, characterized in that: Stabilized soil layer; At least two rigid piles as described in any one of claims 1 to 9, the rigid pile array being distributed in the solidified soil layer.

Images