Method, device and equipment for enhancing bearing capacity of existing pile foundation

Abstract

The invention relates to the technical field of pile foundations, in particular to a method, device and equipment for enhancing the bearing capacity of an existing pile foundation. The method for enhancing the bearing capacity of the existing pile foundation comprises the steps that the existing pile foundation with the bearing capacity to be enhanced is obtained; reinforcement pile foundation treatment is conducted on the bearing layers on the two sides of the existing pile foundation, and reinforcement pile foundations are obtained; and the reinforcing pile foundations and the existing pile foundations are connected in an enclosed mode, and the annularly-restrained pile foundations are obtained. According to the method for enhancing the bearing capacity of the existing pile foundation, reinforcing pile foundations are additionally arranged on bearing layers on the two sides of the existing pile foundation, and the resistance of the pile foundations to pulling and horizontal action is improved; the reinforcing pile foundation and the existing pile foundation are connected into a whole to obtain the pile foundation forming annular constraint, lateral constraint of the pile foundation is improved, the bearing capacity of the pile foundation is synchronously improved, and the technical problem that after an existing pile foundation structure is connected with an upper structure, the bearing capacity, bending resistance and durability of the pile foundation cannot be met is solved.

Description

Technical Field

[0001] This application relates to the technical field of pile foundations, and particularly to a method, device, and equipment for enhancing the bearing capacity of existing pile foundations. Background Art

[0002] A deep foundation composed of piles and a pile cap (referred to as a cap for short) connecting the pile tops (see the figure) or a single-pile foundation connecting a column and a pile foundation is referred to as a pile foundation for short.

[0003] The pile foundation is a load-transferring component of large-scale heavy structures, which finally transfers the load to the foundation. Generally, half of the ultimate bearing capacity of the pile foundation is taken as the resistance design value, and a relatively large load coefficient is also considered for the subsequent design resistance value, leaving a large safety margin for the pile foundation. These safety margins are the result of considering various factors. The bearing characteristics of each pile foundation are not the same, and it is difficult to coordinate the deformations. The pile foundation with the greatest stiffness actually limits the maximum bearing state of the entire foundation.

[0004] Additional measures are required for the connection between the pile foundation and the superstructure. The steel bar arrangement is complex, consuming a large amount of construction man-hours. After the existing structure of the pile foundation is demolished, the bearing capacity and durability of the original pile foundation are weakened. Due to various factors, the existing structure needs to be repaired and renovated, and some involve the demolition and reconstruction of the superstructure. Also, because the pile foundation has been in a stable stratum for a long time, in some cases, the service life of the pile foundation is long, especially the compressive capacity attenuation is small, but the bending capacity and durability are tested. However, after the new superstructure is built, the existing pile foundation is difficult to fully meet the bearing capacity and durability requirements. For example: for pile foundations that are relatively old, when the houses and bridges on the pile foundations are demolished and new houses are to be built again, it is a pity to dig out the old pile foundations and reuse them; but because the bearing capacity of the old pile foundations may not be sufficient, additional pile foundations need to be added on the old pile foundations. Summary of the Invention

[0005] This application provides a method, device, and equipment for enhancing the bearing capacity of existing pile foundations, which are used to solve the technical problem that the bearing capacity and the durability of the bending resistance of the pile foundation cannot be satisfied after the existing pile foundation structure is connected to the superstructure.

[0006] To achieve the above purpose, this application provides the following technical solutions:

[0007] On the one hand, a method for enhancing the bearing capacity of existing pile foundations is provided, including the following steps:

[0008] Obtain the existing pile foundation whose bearing capacity needs to be enhanced; perform reinforcement pile foundation treatment on the bearing layers on both sides of the existing pile foundation to obtain reinforced pile foundations;

[0009] Enclose and connect the reinforced pile foundations with the existing pile foundation to obtain a pile foundation with annular constraint.

[0010] Preferably, on the bearing strata on both sides of the existing pile foundation, the treatment of the reinforced pile foundation is carried out, and the obtained reinforced pile foundation includes:

[0011] Obtain the drilling depth and the insertion depth, and drill the drill pipe of the drill bit into the bearing strata on both sides of the existing pile foundation according to the drilling depth to obtain the hole channels to be treated;

[0012] Carry out pipe cleaning and bottom plugging treatment on the hole channels to be treated to obtain the first hole channels to be grouted;

[0013] Successively carry out the treatment of inserting steel bars and injecting mud into the first hole channels to be grouted to obtain the first grouting hole channels;

[0014] Pull out the drill pipe of the first grouting hole channel from the bearing strata according to the drilling depth, and diffuse the mud in the first grouting hole channel to the bearing strata to obtain the second hole channels to be grouted;

[0015] Carry out the treatment of pressure injecting mud into the second hole channels to be grouted to obtain the second grouting hole channels;

[0016] Insert the drill pipe of the second grouting hole channel into the bearing strata according to the insertion depth, and install the first end fasteners at the top of the steel bars of the second grouting hole channel to obtain the reinforced pile foundation.

[0017] Preferably, the insertion depth is one-fourth of the drilling depth.

[0018] Preferably, before enclosing and connecting the reinforced pile foundation and the existing pile foundation to obtain the pile foundation with annular constraint, the bearing capacity enhancement method includes:

[0019] Straighten the pile head steel bars of the existing pile foundation, and repair the pile head after straightening the pile head steel bars with concrete to obtain a flat pile head;

[0020] Cover the flat pile head with an end cover plate, and the pile head steel bars of the existing pile foundation pass through the reserved holes of the end cover plate and extend out to be connected with the second fixing fasteners to obtain the existing pile foundation with enhanced bearing capacity to be enhanced.

[0021] Preferably, enclosing and connecting the reinforced pile foundation and the existing pile foundation to obtain the pile foundation with annular constraint includes:

[0022] Lay a cushion layer on the site where the reinforced pile foundation and the existing pile foundation are located to obtain the site to be poured;

[0023] Install a steel mesh and an anchoring pull plate on the site to be poured and then carry out concrete pouring to enclose and connect the reinforced pile foundation and the existing pile foundation to obtain the pile foundation with annular constraint.

[0024] On the other hand, a bearing capacity enhancement device for existing pile foundations is provided, including a reinforcement module and a connection module;

[0025] The reinforcement module is used to obtain the existing pile foundation whose bearing capacity needs to be enhanced; carry out reinforcement pile foundation treatment on the bearing layers on both sides of the existing pile foundation to obtain a reinforced pile foundation;

[0026] The connection module is used to enclose and connect the reinforced pile foundation and the existing pile foundation to obtain a pile foundation with annular constraint.

[0027] Preferably, the reinforcement module includes: a drilling sub-module, a cleaning sub-module, a first grouting sub-module, a pipe pulling sub-module, a second grouting sub-module and a reinforcement sub-module;

[0028] The drilling sub-module is used to obtain the drilling depth and the insertion depth, and drill the drill pipe into the bearing layers on both sides of the existing pile foundation according to the drilling depth to obtain a hole to be treated;

[0029] The cleaning sub-module is used to clean the pipe of the hole to be treated and block the bottom of the hole to obtain a first grouting hole;

[0030] The first grouting sub-module is used to insert steel bars and inject slurry into the first grouting hole in sequence to obtain a first grouted hole;

[0031] The pipe pulling sub-module is used to pull out the drill pipe of the first grouted hole from the bearing layer according to the drilling depth, and spread the slurry in the first grouted hole to the bearing layer to obtain a second grouting hole;

[0032] The second grouting sub-module is used to carry out pressure grouting of slurry on the second grouting hole to obtain a second grouted hole;

[0033] The reinforcement sub-module is used to insert the drill pipe of the second grouted hole into the bearing layer according to the insertion depth, and install a first end fastener at the top of the steel bar of the second grouted hole to obtain a reinforced pile foundation.

[0034] Preferably, the insertion depth is one-fourth of the drilling depth.

[0035] Preferably, the connection module includes: a site cushion sub-module and a pouring connection sub-module;

[0036] The site cushion sub-module is used to lay a cushion on the site where the reinforced pile foundation and the existing pile foundation are located to obtain a site to be poured;

[0037] The casting connection sub-module is used to pour concrete after installing the steel mesh and the anchoring pull plate on the site to be cast, and enclose and connect the reinforced pile foundation with the existing pile foundation to obtain a pile foundation with annular constraint.

[0038] In another aspect, a terminal device is provided, including a processor and a memory;

[0039] The memory is used to store program codes and transmit the program codes to the processor;

[0040] The processor is used to execute the method for enhancing the bearing capacity of the existing pile foundation as described above according to the instructions in the program codes.

[0041] The method, device and equipment for enhancing the bearing capacity of the existing pile foundation. The method for enhancing the bearing capacity of the existing pile foundation includes obtaining an existing pile foundation whose bearing capacity needs to be enhanced; performing treatment on the bearing layers on both sides of the existing pile foundation to obtain a reinforced pile foundation; enclosing and connecting the reinforced pile foundation with the existing pile foundation to obtain a pile foundation with annular constraint.

[0042] It can be seen from the above technical solutions that the present application has the following advantages: The method for enhancing the bearing capacity of the existing pile foundation increases the reinforced pile foundation on the bearing layers on both sides of the existing pile foundation, improving the resistance of the pile foundation to uplift and horizontal actions; connecting the reinforced pile foundation with the existing pile foundation as a whole to form a pile foundation with annular constraint, enhancing the lateral constraint of the pile foundation and simultaneously improving the bearing capacity of the pile foundation, solving the technical problem that the bearing capacity and durability of the bending resistance of the pile foundation cannot be satisfied after the existing pile foundation structure is connected to the upper structure.

[0043] The device for enhancing the bearing capacity of the existing pile foundation realizes increasing the reinforced pile foundation on the bearing layers on both sides of the existing pile foundation through the reinforcement module and the connection module, improving the resistance of the pile foundation to uplift and horizontal actions; connecting the reinforced pile foundation with the existing pile foundation as a whole to form a pile foundation with annular constraint, enhancing the lateral constraint of the pile foundation and simultaneously improving the bearing capacity of the pile foundation, solving the technical problem that the bearing capacity and durability of the bending resistance of the pile foundation cannot be satisfied after the existing pile foundation structure is connected to the upper structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0045] Figure 1 It is a flowchart of the steps of the method for enhancing the bearing capacity of the existing pile foundation according to the embodiments of the present application;

[0046] Figure 2 Schematic diagram of the structure of a pile foundation with a circular constraint in the method for enhancing the bearing capacity of an existing pile foundation according to an embodiment of the present application;

[0047] Figure 3 Flow chart of obtaining a reinforcement device in the method for enhancing the bearing capacity of an existing pile foundation according to an embodiment of the present application;

[0048] Figure 4 Schematic diagram of the structure of an existing pile foundation in the method for enhancing the bearing capacity of an existing pile foundation according to an embodiment of the present application;

[0049] Figure 5 Frame schematic diagram of the device for enhancing the bearing capacity of an existing pile foundation according to an embodiment of the present application;

[0050] Figure 6 Schematic diagram of the terminal device according to an embodiment of the present application. Detailed implementation manners

[0051] To make the objectives, features, and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0052] In the description of the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0053] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0054] The embodiments of the present application provide a method, device, and equipment for enhancing the bearing capacity of existing pile foundations, which solve the technical problems that the bearing capacity and durability of the bending resistance of pile foundations cannot meet the requirements after the existing pile foundation structure is connected to the superstructure.

[0055] Embodiment 1:

[0056] Figure 1 It is a flowchart of the steps of the method for enhancing the bearing capacity of the existing pile foundation according to the embodiments of the present application. Figure 2 It is a schematic structural diagram of the pile foundation with annular constraint in the method for enhancing the bearing capacity of the existing pile foundation according to the embodiments of the present application.

[0057] As Figure 1 shown, the embodiments of the present application provide a method for enhancing the bearing capacity of an existing pile foundation, including the following steps:

[0058] S1. Obtain the existing pile foundation whose bearing capacity needs to be enhanced; perform reinforcement pile foundation treatment on the bearing layers on both sides of the existing pile foundation to obtain the reinforced pile foundation.

[0059] It should be noted that in step S1, the existing pile foundation whose bearing capacity needs to be enhanced is obtained, and the reinforced pile foundation is added to the bearing layers on both sides of the existing pile foundation. It can be understood that the reinforced pile foundation is newly added on the basis of the existing pile foundation to improve the resistance of the pile foundation to uplift and horizontal actions. In this embodiment, as Figure 2 shown, the reinforced pile foundation 102 is newly added to the bearing layers on both sides of the existing pile foundation 101. The existing pile foundation 101 can be an inclined pile foundation, and on the basis of the newly added reinforced pile foundation 102, the resistance of the pile foundation to uplift and horizontal actions is stronger.

[0060] S2. Enclose and connect the reinforced pile foundation with the existing pile foundation to obtain a pile foundation with annular constraint.

[0061] It should be noted that in step S2, according to step S1, a concrete pile cap is formed by pouring both the reinforced pile foundation and the existing pile foundation to connect the reinforced pile foundation and the existing pile foundation into a whole to obtain a pile foundation with annular constraint, improve the lateral constraint of the pile foundation, and simultaneously improve the bearing capacity of the pile foundation.

[0062] In the embodiments of the present application, the pile foundation obtained by the method for enhancing the bearing capacity of the existing pile foundation can undergo partial deformation during an earthquake, consume a large amount of energy, have a small torsional effect on the pile head of the pile foundation, adapt to the characteristics of old concrete being non-tensile and brittle, and mainly exert the vertical bearing capacity of the pile foundation.

[0063] A method for enhancing the bearing capacity of existing pile foundations provided by this application includes obtaining existing pile foundations whose bearing capacity needs to be enhanced; performing reinforcement pile foundation treatment on the bearing layers on both sides of the existing pile foundations to obtain reinforced pile foundations; and enclosing and connecting the reinforced pile foundations with the existing pile foundations to obtain pile foundations with annular constraints. This method for enhancing the bearing capacity of existing pile foundations increases the reinforced pile foundations on the bearing layers on both sides of the existing pile foundations to improve the resistance of the pile foundations to uplift and horizontal actions; connects the reinforced pile foundations with the existing pile foundations to form an integral pile foundation with annular constraints, enhances the lateral constraint of the pile foundations, and synchronously improves the bearing capacity of the pile foundations, solving the technical problem that the bearing capacity and durability of the bending resistance of the pile foundations cannot be satisfied after the existing pile foundation structure is connected to the upper structure.

[0064] Figure 3 It is a schematic flow chart for obtaining a reinforcement device in the method for enhancing the bearing capacity of the existing pile foundation described in the embodiment of this application.

[0065] As Figure 3 shown, in an embodiment of this application, performing reinforcement pile foundation treatment on the bearing layers on both sides of the existing pile foundations to obtain reinforced pile foundations includes:

[0066] Obtaining the drilling depth and the insertion depth, and drilling the drill pipe of the bit into the bearing layers on both sides of the existing pile foundations according to the drilling depth to obtain the channels to be treated;

[0067] Performing pipeline cleaning and bottom hole plugging treatment on the channels to be treated to obtain the first channels to be grouted;

[0068] Successively performing steel bar insertion and mud injection treatment on the first channels to be grouted to obtain the first grouting channels;

[0069] Pull out the drill pipe of the bit of the first grouting channel from the bearing layer according to the drilling depth, and diffuse the mud in the first grouting channel into the bearing layer to obtain the second channels to be grouted;

[0070] Performing pressure grouting treatment on the second channels to be grouted to obtain the second grouting channels;

[0071] Insert the drill pipe of the bit of the second grouting channel into the bearing layer according to the insertion depth, and install the first end fastener at the top of the steel bar of the second grouting channel to obtain the reinforced pile foundation.

[0072] It should be noted that the insertion depth can be selected as one-fourth of the drilling depth. The steel bar can be selected as a special-shaped threaded steel bar. In this embodiment, as Figure 3As shown, a steel pipe with a drill bit 103 is drilled into the bearing layer of an existing pile foundation 101, and the drill bit steel pipe 103 reaches the drilling depth h set in the bearing layer, and then the mud in the drill bit steel pipe of the to-be-treated channel 104 is cleaned by water circulation; a plugging material with a relatively high density is used to plug the bottom of the drill bit steel pipe, and then a special-shaped threaded steel bar is inserted into the first to-be-grouted channel 105, and then mud (such as cement mortar) is injected into the drill bit steel pipe, and the height of the bearing layer h is pulled out on the drill bit steel pipe of the first grouting channel 106, and after the mortar diffuses to the bearing layer, a second to-be-grouted channel 107 is obtained, and cement mortar is again pressurized and injected into the drill bit steel pipe of the second to-be-grouted channel 107 to obtain a second grouting channel 108. Then the drill bit steel pipe of the second grouting channel 108 is inserted into the bearing layer to a depth of 1 / 4h. In this embodiment, if the existing pile foundation is to be reused in a new house, the surrounding soil must be compacted. The general excavation process of the pile foundation will loosen the underground soil, which is equivalent to scrapping the existing pile foundation and failing to achieve the purpose of using the existing pile foundation. The reinforced pile foundation obtained by the method for enhancing the bearing capacity of the existing pile foundation adopts a steel casing, and the soil is taken out from the pipe, which will not loosen the underground soil and realize the reuse of the existing pile foundation.

[0073] Figure 4 It is a schematic structural diagram of an existing pile foundation in the method for enhancing the bearing capacity of an existing pile foundation described in an embodiment of the present application.

[0074] like Figure 4 As shown, in one embodiment of the present application, before the reinforced pile foundation is enclosed and connected with the existing pile foundation to obtain a pile foundation with an annular constraint, the bearing capacity enhancement method includes:

[0075] The existing pile head reinforcement of the pile foundation is straightened, and the pile head after the reinforcement is straightened is repaired with concrete to obtain a flat pile head;

[0076] The end cover plate is covered on the flat pile head, and the pile head steel bars of the existing pile foundation extend through the reserved holes of the end cover plate and are connected to the second fixing fasteners to obtain the existing pile foundation whose bearing capacity is to be enhanced.

[0077] It should be noted that in the process of obtaining a pile foundation with annular constraints, the excess concrete of the pile head of the existing pile foundation is first removed to about 3 cm below the design elevation of the foundation. The pile head steel bars are straightened, and then the pile head is repaired to a flat surface with high-strength concrete. The foundation site is leveled and the end cover plate 110 is covered on the flat pile head, and the steel bars pass through the reserved holes of the end cover plate 110. The second fastener 120 (such as a bolt) for fixing the end is screwed on the reserved hole to obtain the existing pile foundation whose bearing capacity is to be enhanced.

[0078] In one embodiment of the present application, the reinforced pile foundation is connected to the existing pile foundation in an enclosed manner to obtain a pile foundation with an annular constraint, including:

[0079] Lay a cushion layer on the site where the reinforced pile foundation and the existing pile foundation are located to obtain the site to be poured.

[0080] After installing the steel mesh and the anchor plate on the site to be poured, pour concrete to enclose and connect the reinforced pile foundation and the existing pile foundation to obtain a pile foundation with annular restraint.

[0081] It should be noted that a gravel layer and a cement mortar layer are first laid as the cushion layer 140 on the site where the reinforced pile foundation and the existing pile foundation are located, as Figure 4 shown. After that, install the steel mesh of the foundation structure and the anchor plate 130 of the existing pile foundation (the anchor plate 130 is connected to the pile head steel bars of the existing pile foundation) on the site to be poured, pour concrete, so that the drill pipe of the reinforced pile foundation is welded or installed on the anchor plate 130 and consolidated with the existing pile foundation. Tap the edge of the end cover plate 110 to ensure that the end cover plate 130 and the pile head of the existing pile foundation are not solidified into a whole. The method for enhancing the bearing capacity of the existing pile foundation improves the bearing capacity of the pile foundation through the structure of the steel bars of the reinforced pile foundation pulling and the end cover plate 130 of the existing pile foundation isolating the cap head, and also avoids being damaged by pressure.

[0082] Embodiment 2:

[0083] Figure 5 It is a frame schematic diagram of the device for enhancing the bearing capacity of the existing pile foundation described in the embodiment of the present application.

[0084] As Figure 5 shown, the embodiment of the present application provides a device for enhancing the bearing capacity of an existing pile foundation, including a reinforcement module 10 and a connection module 20;

[0085] The reinforcement module 10 is used to obtain the existing pile foundation whose bearing capacity needs to be enhanced; perform reinforcement pile foundation treatment on the bearing layers on both sides of the existing pile foundation to obtain a reinforcement pile foundation;

[0086] The connection module 20 is used to enclose and connect the reinforcement pile foundation and the existing pile foundation to obtain a pile foundation with annular restraint.

[0087] It should be noted that the content of the modules in the device of Embodiment 2 has been described in the content of the steps in Embodiment 1, and the content of the modules of the device for enhancing the bearing capacity of the existing pile foundation will not be repeated in this embodiment. In this embodiment, the device for enhancing the bearing capacity of the existing pile foundation realizes adding a reinforcement pile foundation on the bearing layers on both sides of the existing pile foundation through the reinforcement module and the connection module, improves the resistance of the pile foundation to uplift and horizontal action; connects the reinforcement pile foundation and the existing pile foundation into a whole to form a pile foundation with annular restraint, enhances the lateral restraint of the pile foundation, and synchronously improves the bearing capacity of the pile foundation, solving the technical problem that the bearing capacity and the durability of the bending resistance of the pile foundation cannot be satisfied after the existing pile foundation structure is connected to the upper structure.

[0088] In the embodiment of the present application, the reinforcement module 10 includes: a drilling sub-module, a cleaning sub-module, a first grouting sub-module, a pipe pulling sub-module, a second grouting sub-module, and a reinforcement sub-module;

[0089] The drilling sub-module is used to obtain the drilling depth and the insertion depth, and drill the drill pipe into the bearing layers on both sides of the existing pile foundation according to the drilling depth to obtain the to-be-treated pore channels;

[0090] The cleaning sub-module is used to clean the pipelines of the to-be-treated pore channels and seal the bottom of the holes to obtain the first to-be-grouted pore channels;

[0091] The first grouting sub-module is used to insert steel bars and inject mud into the first to-be-grouted pore channels in sequence to obtain the first grouting pore channels;

[0092] The pipe pulling sub-module is used to pull out the drill pipe of the first grouting pore channels from the bearing layer according to the drilling depth, and spread the mud in the first grouting pore channels to the bearing layer to obtain the second to-be-grouted pore channels;

[0093] The second grouting sub-module is used to perform pressurized mud injection on the second to-be-grouted pore channels to obtain the second grouting pore channels;

[0094] The reinforcement sub-module is used to insert the drill pipe of the second grouting pore channels into the bearing layer according to the insertion depth, and install the first end fasteners at the top ends of the steel bars in the second grouting pore channels to obtain the reinforced pile foundation.

[0095] In the embodiment of the present application, the insertion depth is one-fourth of the drilling depth.

[0096] In the embodiment of the present application, the connection module 20 includes: a site cushion sub-module and a pouring connection sub-module;

[0097] The site cushion sub-module is used to lay cushions on the site where the reinforced pile foundation and the existing pile foundation are located to obtain the to-be-poured site;

[0098] The pouring connection sub-module is used to install the steel bar mesh and the anchor tension plates on the to-be-poured site and then perform concrete pouring to enclose and connect the reinforced pile foundation and the existing pile foundation to obtain the pile foundation with annular constraint.

[0099] Embodiment 3:

[0100] Figure 6 It is a schematic diagram of the terminal device according to the embodiment of the present application.

[0101] As Figure 6 shown, the embodiment of the present application provides a terminal device, including a processor and a memory;

[0102] The memory is used to store program codes and transmit the program codes to the processor;

[0103] A processor for executing the above-described method for enhancing the bearing capacity of existing pile foundations according to instructions in program code.

[0104] It should be noted that the processor is used to execute the steps in the above-described embodiment of a method for enhancing the bearing capacity of existing pile foundations according to instructions in program code. Alternatively, when the processor executes a computer program, it implements the functions of each module / unit in the above-described system / device embodiments.

[0105] Exemplarily, the computer program can be divided into one or more modules / units, and one or more modules / units are stored in the memory and executed by the processor to complete the present application. One or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the computer program in the terminal device.

[0106] The terminal device can be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The terminal device may include, but is not limited to, a processor and a memory. Those skilled in the art can understand that this does not limit the terminal device, and it may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, the terminal device may further include input / output devices, network access devices, a bus, etc.

[0107] The so-called processor may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor, or the processor may also be any conventional processor, etc.

[0108] The memory can be an internal storage unit of the terminal device, such as the hard disk or memory of the terminal device. The memory can also be an external storage device of the terminal device, such as a plug-in hard disk equipped on the terminal device, a SmartMedia Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. Further, the memory can also include both the internal storage unit and the external storage device of the terminal device. The memory is used to store computer programs and other programs and data required by the terminal device. The memory can also be used to temporarily store the data that has been output or will be output.

[0109] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0110] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0111] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0112] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0113] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present invention, in essence, or the part that makes a contribution to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs.

[0114] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of various embodiments of the present application.

Claims

1. A method for enhancing the bearing capacity of existing pile foundations, characterized in that, It includes the following steps: Obtain the existing pile foundation whose bearing capacity needs to be enhanced; Perform treatment on the pile foundations for reinforcement on the bearing strata on both sides of the existing pile foundation to obtain the reinforced pile foundations; Enclose and connect the reinforced pile foundations with the existing pile foundation to obtain the pile foundation with annular constraint.

2. The method for enhancing the bearing capacity of existing pile foundations according to claim 1, characterized in that, Performing treatment on the pile foundations for reinforcement on the bearing strata on both sides of the existing pile foundation to obtain the reinforced pile foundations includes: Obtain the drilling depth and the insertion depth, and drill the drill pipe of the bit into the bearing strata on both sides of the existing pile foundation according to the drilling depth to obtain the pore channels to be treated; Perform pipe cleaning and bottom plugging treatment on the pore channels to be treated to obtain the first pore channels to be grouted; Perform the operations of inserting steel bars and injecting slurry in sequence on the first pore channels to be grouted to obtain the first grouting pore channels; Pull out the drill pipe of the bit of the first grouting pore channel from the bearing strata according to the drilling depth, and diffuse the slurry in the first grouting pore channel into the bearing strata to obtain the second pore channels to be grouted; Perform pressure grouting treatment on the second pore channels to be grouted to obtain the second grouting pore channels; Insert the drill pipe of the bit of the second grouting pore channel into the bearing strata according to the insertion depth, and install the first end fastener on the top of the steel bars of the second grouting pore channel to obtain the reinforced pile foundation.

3. The method for enhancing the bearing capacity of existing pile foundations according to claim 2, wherein, The insertion depth is one-fourth of the drilling depth.

4. The method for enhancing the bearing capacity of existing pile foundations according to any one of claims 1 to 3, characterized in that, Before enclosing and connecting the reinforced pile foundation with the existing pile foundation to obtain the pile foundation with annular constraint, this method for enhancing the bearing capacity includes: Straighten the pile head steel bars of the existing pile foundation, and repair the pile head after straightening the pile head steel bars with concrete to obtain a flat pile head; Cover the flat pile head with an end cover plate, and the pile head steel bars of the existing pile foundation pass through the reserved holes of the end cover plate and extend out to be connected with the second fixing fasteners to obtain the existing pile foundation whose bearing capacity needs to be enhanced.

5. The method for enhancing the bearing capacity of existing pile foundations according to any one of claims 1 to 3, characterized in that, Enclosing and connecting the reinforced pile foundation with the existing pile foundation to obtain the pile foundation with annular constraint includes: Lay a cushion layer on the site where the reinforced pile foundation and the existing pile foundation are located to obtain the site to be poured; Install a steel mesh and an anchoring pull plate on the site to be poured and then perform concrete pouring to enclose and connect the reinforced pile foundation with the existing pile foundation to obtain the pile foundation with annular constraint.

6. An enhanced load-bearing capacity device for existing pile foundations, characterized in that, It includes: A reinforcement module and a connection module; The reinforcement module is used to obtain the existing pile foundation whose bearing capacity needs to be enhanced; Perform treatment on the pile foundations for reinforcement on the bearing strata on both sides of the existing pile foundation to obtain the reinforced pile foundations; The connection module is used to enclose and connect the reinforced pile foundation with the existing pile foundation to obtain the pile foundation with annular constraint.

7. The bearing capacity enhancing device for existing pile foundations according to claim 6, wherein, The reinforcement module includes: a drilling sub-module, a cleaning sub-module, a first grouting sub-module, a pipe pulling out sub-module, a second grouting sub-module and a reinforcement sub-module; The drilling sub-module is used to obtain the drilling depth and the insertion depth, and drill the drill pipe of the bit into the bearing strata on both sides of the existing pile foundation according to the drilling depth to obtain the pore channels to be treated; The cleaning sub-module is used to perform pipe cleaning and bottom plugging treatment on the pore channels to be treated to obtain the first pore channels to be grouted; The first grouting sub-module is used to perform the operations of inserting steel bars and injecting slurry in sequence on the first pore channels to be grouted to obtain the first grouting pore channels; The drill pipe extraction sub-module is used to extract the drill pipe of the first grouting channel from the bearing stratum according to the drilling depth, and diffuse the slurry in the first grouting channel to the bearing stratum to obtain a second grouting channel to be grouted; The second grouting sub-module is used to perform pressure grouting treatment on the second grouting channel to be grouted to obtain a second grouting channel; The reinforcement sub-module is used to insert the drill pipe of the second grouting channel into the bearing stratum according to the insertion depth, and install a first end fastener at the top of the steel bar of the second grouting channel to obtain a reinforced pile foundation.

8. The device for enhancing the bearing capacity of existing pile foundations according to claim 7, characterized in that, The insertion depth is one-fourth of the drilling depth.

9. The device for enhancing the bearing capacity of existing pile foundations according to any one of claims 6-8, characterized in that The connection module includes: a site cushion sub-module and a casting connection sub-module; The site cushion sub-module is used to lay a cushion on the site where the reinforced pile foundation and the existing pile foundation are located to obtain a site to be cast; The casting connection sub-module is used to install a steel bar mesh and an anchor plate on the site to be cast and then perform concrete casting to enclose and connect the reinforced pile foundation and the existing pile foundation to obtain a pile foundation with annular constraint.

10. A terminal device, characterized in that, It includes a processor and a memory; The memory is used to store program codes and transmit the program codes to the processor; The processor is used to execute the method for enhancing the bearing capacity of the existing pile foundation according to any one of claims 1-5 according to the instructions in the program codes.

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