A guidance method and device for pile foundation construction.

Abstract

This invention relates to the field of construction guidance technology, specifically to a guidance method and device for pile foundation construction. It includes: Step S1, acquiring a visualized advanced geological model based on advanced geological survey information; Step S2, acquiring real-time drilling information at the drill rod location; Step S3, comparing the visualized advanced geological model and the drilling information in real time; and Step S4, responding to the comparison results. Obtaining the visualized advanced geological model allows for a preliminary understanding of the geological structure, enabling intuitive observation of rock strata layering and the distribution of karst caves. Real-time comparison of the visualized advanced geological model and the drilling information allows for a direct comparison of the drill rod's real-time status with the visualized advanced geological model, providing timely alerts when the drill rod reaches the interface between the soil / rock layer or karst cave on the visualized advanced geological model.

Description

Technical Field

[0001] This invention relates to the field of construction guidance technology, specifically to a guidance method and device for pile foundation construction. Background Technology

[0002] In pile foundation engineering under karst geological conditions, hidden karst caves in the strata may lead to accidents such as mud leakage, well collapse, or well wall collapse, which can affect the construction quality. Therefore, it is necessary to design guidance schemes to address the potential presence of karst caves during pile foundation construction.

[0003] The existing method involves construction workers relying on their experience, such as the stalling of the drill pipe or changes in the sound of the machinery, to determine whether the drill pipe has encountered melting. However, this method can be inaccurate and untimely if the construction workers are fatigued or busy. Summary of the Invention

[0004] Therefore, the present invention aims to overcome the technical problems required in the prior art, thereby providing a guidance method and guidance device for the pile foundation construction process.

[0005] This invention provides a guiding method for pile foundation construction, comprising:

[0006] Step S1: Based on advanced geological exploration information, obtain a visualized advanced geological model;

[0007] Step S2: Obtain real-time drilling information at the drill pipe location;

[0008] Step S3: Perform real-time comparison between the visualized advanced geological model and the drilling information;

[0009] Step S4: Compare the results and respond accordingly.

[0010] Furthermore, the visualized advanced geological model includes an advanced 3D model, advanced soil and rock layer distribution information, and advanced karst cave distribution information.

[0011] Furthermore, the visualized advanced geological model uses the advanced 3D model as a reference to annotate the distribution information of advanced soil and rock layers and the distribution information of advanced karst caves.

[0012] Furthermore, the drilling information includes video information of the drill pipe, depth information, and angle information.

[0013] Furthermore, step S3 includes:

[0014] Step S31: Based on the drilling information, obtain a visualized real-time geological model for drilling;

[0015] Step S32: Set key nodes at the interfaces of multiple soil and rock layers or karst caves in the visualized advanced geological model;

[0016] Step S33: Set a dynamic cursor on the visualized real-time geological model while drilling, wherein the dynamic cursor represents the actual depth of the drill pipe;

[0017] Step S34: Based on the advance of the drill pipe, compare the dynamic cursor with any key node in real time.

[0018] Furthermore, step S31 includes:

[0019] Using the depth information of the drill pipe as a reference, the video information and angle information are stitched together to obtain a visualized real-time geological model while drilling.

[0020] Furthermore, the visualized real-time geological model while drilling includes a real-time 3D model, real-time soil and rock layer distribution information, and real-time karst cave distribution information. The real-time soil and rock layer distribution information and real-time karst cave distribution information are annotated with reference to the real-time 3D model, and the dynamic cursor is located at the bottom of the real-time 3D model.

[0021] Furthermore, step S4 includes:

[0022] An alarm is triggered when the dynamic cursor coincides with any critical node.

[0023] Furthermore, step S4 includes:

[0024] When the dynamic cursor does not coincide with any critical node but the drill pipe malfunctions, an alarm is issued and feedback is provided.

[0025] A guidance device for pile foundation construction, comprising:

[0026] The visualization advanced geological model acquisition module is used to acquire visualization advanced geological models based on advanced geological exploration information.

[0027] The drilling information acquisition module is used to acquire drilling information at the drill pipe in real time;

[0028] The comparison module is used to compare the visualized advanced geological model and the drilling information in real time;

[0029] The response module is used to respond to the comparison results.

[0030] The technical solution of this invention has the following advantages:

[0031] This invention provides a guidance method and device for pile foundation construction, which obtains a visualized advanced geological model, allowing for a preliminary understanding of the geological structure. Based on the obtained visualized advanced geological model, the stratification of rock layers and the distribution of karst caves can be observed intuitively. Real-time comparison between the visualized advanced geological model and drilling data allows for intuitive observation of the drill rod's real-time status. When the drill rod reaches the interface between soil and rock layers or karst caves on the visualized advanced geological model, a timely response and alert can be provided. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram illustrating the principle of the present invention;

[0034] Figure 2 This is a schematic diagram of the advanced geological model visualized in this invention;

[0035] Figure 3 This is a schematic diagram illustrating the principle of the present invention;

[0036] Figure 4 This is a schematic diagram of the visualized real-time geological model during drilling for this invention;

[0037] Figure 5 This is a schematic diagram of the response content of the present invention;

[0038] Figure 6 This is a schematic diagram of the final geological model visualized during drilling in this invention;

[0039] Figure 7 This is a schematic diagram of the guiding device during the pile foundation construction process of the present invention. Detailed Implementation

[0040] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0043] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] Example 1

[0045] Karst landforms, also known as karst topography, are a special type of landform formed by the long-term erosion of soluble rocks by groundwater. Due to the long-term erosion in karst areas, the bearing capacity is insufficient, making buildings and foundations built in karst areas prone to uneven settlement, frost heave, piping, collapse, and other deformation and damage. Due to long-term erosion by groundwater, limestone areas gradually form caves. Because of the inherent concealment of these caves, construction is extremely difficult. Furthermore, any errors during construction can lead to accidents such as mud leakage, well or well wall collapse, directly affecting the construction quality of the project and thus compromising the safety and stability of the building. Moreover, due to the special nature of the construction site, the service life of the building cannot be guaranteed. Therefore, before pile foundation construction in karst areas, it is necessary to conduct a thorough on-site geological survey to understand the size, patterns, and shapes of the caves encountered during pile foundation construction. The geological conditions should be detailed in the survey documents in the form of columnar diagrams, etc., to guide the subsequent pile foundation construction plan and affect the later settlement of the project.

[0046] Karst geological conditions often involve numerous and irregularly sized caves, whose shapes are difficult to determine. Drilling and other techniques typically only reveal the geological conditions at a specific point, making them somewhat unpredictable. During pile foundation construction, once the borehole reaches the depth of a cave, the drilling speed will change or abruptly alter, and factors such as the sound of the machinery will also change. Construction workers—the pile driver operators—often rely on instructions from site management or their visual senses to determine if the cave depth has been reached during drilling or perforation. Simultaneously, construction workers should clearly record the actual karst encounters during pile foundation work in the construction report, combining this information with the authoritative geological survey report issued by the surveying unit, as the basis for later project settlement.

[0047] The quality of pile foundations directly affects the safety of buildings. Pile foundation quality is closely related to the engineering geological conditions of the construction area, such as the composition, physical state, and structure of the surrounding soil and rock layers. However, engineering geological conditions vary greatly and information is abundant. Engineering survey reports are mostly stored in the form of data charts and cross-sectional drawings, lacking effective management and full utilization. This brings many inconveniences and difficulties to actual construction guidance, thus traditional engineering survey reports cannot meet the needs. With the development of technology, especially the application of BIM technology in the pile foundation construction process, new digital three-dimensional engineering survey reports are provided in a three-dimensional visualization format for pile foundation engineering. Its intuitive engineering survey results allow users to conduct comprehensive and dynamic analysis and utilization as needed, thus enabling them to correctly grasp and understand the spatial distribution characteristics and variation patterns of geological bodies. However, the current application of this technology in the industry mainly involves setting screening rules based on design requirements and specifications to identify engineering piles to be optimized, and then optimizing these selected piles. This includes optimizing the early-stage construction period and resource allocation of pile foundation projects: interrelation of labor, material quantities, construction machinery, and construction period in pile foundation projects; selection of reasonable pile construction parameters; and determination of the optimal overall layout and optimal pile foundation construction scheme. Research on combining actual construction conditions with on-site construction guidance to create scientific pile foundation construction records that ultimately serve commercial settlement is still lacking or nonexistent.

[0048] like Figures 1 to 6 The illustrated method for guiding the construction of pile foundations includes:

[0049] Step S1: Based on advanced geological exploration information, obtain a visualized advanced geological model;

[0050] Step S2: Obtain real-time drilling information at the drill pipe location;

[0051] Step S3: Perform real-time comparison between the visualized advanced geological model and the drilling information;

[0052] Step S4: Compare the results and respond accordingly.

[0053] Specifically, this invention can be implemented through a BIM platform, such as Autodesk Revit and Graphisoft ArchiCAD. Advanced geological exploration information can be obtained through advanced drilling. Using this information, CAD files such as advanced drilling columnar sections can be created. After importing these CAD files into the BIM platform, the platform utilizes its parameter capture and modeling functions to generate parameter tables and a visualized advanced geological model. This visualized advanced geological model can be understood as a visual display of the geological model obtained from advanced drilling on a monitor. The monitor can be located at the construction site or remotely, such as in the driver's cab. This is an application of real-time geological visualization technology in a pile driver's cab based on a BIM model. From advanced drilling to obtaining a visualized advanced geological model, a preliminary understanding of the geological structure can be achieved. The obtained visualized advanced geological model allows for direct observation of the strata layering and the distribution of karst caves. Drilling-while-drilling information at the drill pipe can be obtained through geological exploration equipment that interacts with the BIM platform, such as borehole imaging devices and depth sensors. This drilling-while-drilling information represents the real-time status of the drill pipe. Real-time comparison of the visualized advanced geological model and drilling information can be achieved by displaying both on the same screen. This allows for a direct comparison of the drill pipe's real-time status with the visualized advanced geological model. Timely alerts are provided when the drill pipe reaches the interface between soil / rock layers or karst caves on the visualized advanced geological model, enabling construction personnel to accurately grasp the drilling progress. The final actual geological conditions during drilling are then summarized and compiled as a basis for settlement.

[0054] Furthermore, the visualized advanced geological model includes an advanced 3D model, advanced soil and rock layer distribution information, and advanced karst cave distribution information.

[0055] The advanced 3D model is built specifically for the advanced drilling. Since the advanced drill has a relatively small diameter and a limited exploration range in the strata, sudden dissolution of the drill pipe may occur. This means that although it may not be displayed in the visualized advanced geological model, the drill pipe is actually dissolving because its larger diameter makes it more likely to encounter karst caves outside the advanced drill's exploration range. The advanced rock and soil layer distribution information includes the layering order, layering depth, and layering thickness of each advanced rock layer in the advanced 3D model. The advanced karst cave distribution information includes the layering order and layering thickness of each advanced karst cave in the advanced 3D model. Once the layering order, layering depth, and layering thickness of each advanced rock layer and the layering order and layering thickness of the advanced karst cave in the advanced 3D model are determined, the layering thickness of the advanced karst cave is also determined.

[0056] Furthermore, such as Figure 2 As shown, the visualized advanced geological model uses an advanced 3D model as a reference to annotate the distribution information of advanced soil and rock layers and the distribution information of advanced karst caves. After annotation, the distribution of advanced soil and rock layers and the distribution of advanced karst caves can be observed intuitively. It should be noted that the advanced information in this application refers to the information obtained by advanced drilling.

[0057] Furthermore, the drilling information includes video information of the drill pipe, depth information, and angle information.

[0058] Furthermore, such as Figure 3 As shown, step S3 includes:

[0059] Step S31: Based on the drilling information, obtain a visualized real-time geological model for drilling;

[0060] Step S32: Set key nodes at the interfaces of multiple soil and rock layers or karst caves in the visualized advanced geological model;

[0061] Step S33: Set a dynamic cursor on the visualized real-time geological model while drilling. The dynamic cursor represents the actual depth of the drill pipe, such as... Figure 4 As shown;

[0062] Step S34: Based on the advance of the drill pipe, compare the dynamic cursor with any key node in real time.

[0063] Furthermore, step S31 includes:

[0064] Using the drill pipe's depth information as a reference, video and angle information are stitched together to obtain a visualized real-time geological model while drilling. The stitched video information allows observation of whether the drill pipe has encountered melting.

[0065] Furthermore, such as Figure 4 and Figure 5 As shown, the visualized real-time geological model during drilling includes a real-time 3D model, real-time soil and rock layer distribution information, and real-time karst cave distribution information. The real-time soil and rock layer distribution information and the real-time karst cave distribution information are annotated using the real-time 3D model as a reference. The dynamic cursor is located at the bottom of the real-time 3D model. The real-time 3D model is established based on the actual operating state of the drill pipe, and the real-time soil and rock layer distribution information and the real-time karst cave distribution information can be determined based on video information, depth information, and angle information from the drilling data.

[0066] Furthermore, step S4 includes:

[0067] An alarm is triggered when the dynamic cursor coincides with any key node. This coincidence indicates that the drill rod has encountered the interface between a soil / rock layer or a karst cave, with particular attention required at karst cave interfaces. The alarm can be broadcast voice-activated to guide workers, who can then stop drilling and begin filling the karst cave. The alarm can be issued through the BIM platform or via sensors that interact with it. The dynamic cursor coinciding with any key node could mean it's coinciding with either the upper or lower interface of a karst cave, thus determining its depth.

[0068] Furthermore, step S4 includes:

[0069] When the dynamic cursor does not coincide with any key node but the drill pipe malfunctions, an alarm should be issued and feedback should be provided. The drill pipe malfunction is generally caused by stalling when the drill pipe encounters molten metal or by changes in the mechanical sounds (drill pipe or other hoisting equipment) caused by the drill pipe. In this situation, it is usually because the drill pipe diameter is relatively large, making it more likely to encounter karst caves outside the exploration range of the advanced drilling. An alarm should be issued and feedback should be provided to the BIM platform. The feedback can be done by marking and recording the dynamic cursor, i.e., the molten metal encounter point, and combining this with the authoritative geological survey report issued by the exploration unit in the early stages, to guide the construction personnel in their work. The construction personnel can then stop the drill pipe operation and fill the karst cave.

[0070] If the dynamic cursor does not coincide with any key node but the drill rod malfunctions, it could be due to discrepancies between the advanced soil and rock layer distribution information and the advanced karst cave distribution information on the advanced 3D model and the real-time soil and rock layer distribution information and the real-time karst cave distribution information on the real-time 3D model. The visualized advanced geological model should be corrected to ensure its guiding significance. This could be achieved by translating the advanced 3D model as a whole or by altering the advanced soil and rock layer distribution information and the advanced karst cave distribution information. Figure 7 As shown, when the drill pipe completes its operation, i.e., when the dynamic cursor reaches the lowest point, the visualized real-time geological model while drilling can be considered the final visualized geological model while drilling.

[0071] Example 2

[0072] like Figure 7 A specific embodiment of a guidance device for pile foundation construction is shown. This guidance device for pile foundation construction includes:

[0073] The visualization advanced geological model acquisition module is used to acquire visualization advanced geological models based on advanced geological exploration information.

[0074] The drilling information acquisition module is used to acquire drilling information at the drill pipe in real time;

[0075] The comparison module is used to compare the visualized advanced geological model and the drilling information in real time;

[0076] The response module is used to respond to the comparison results.

[0077] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method of guiding in a pile foundation construction process, characterized by, The method comprises the following steps: Step S1, obtaining a visual advanced geological model based on advanced information of geological survey; Step S2, obtaining real-time drilling information at the drill rod; Step S3, comparing the visual advanced geological model and the real-time drilling information in real time; Step S4, responding to the comparison result; The step S3 comprises: Step S31, obtaining a visual real-time drilling geological model based on the drilling information; Step S32, setting key nodes at the interfaces of multiple rock-soil layers or karst caves in the visual advanced geological model; Step S33, setting a dynamic cursor on the visual real-time drilling geological model, the dynamic cursor representing the actual depth of the drill rod; Step S34, comparing the dynamic cursor and any key node in real time based on the advancement of the drill rod.

2. The guiding method in a pile foundation construction process according to claim 1, characterized in that, The visual advanced geological model comprises an advanced three-dimensional model, advanced rock-soil layer distribution information, and advanced karst cave distribution information.

3. A method of guiding a pile foundation construction process according to claim 2, characterized in that, The visual advanced geological model takes the advanced three-dimensional model as a reference to mark the advanced rock-soil layer distribution information and the advanced karst cave distribution information.

4. A method of guiding a pile foundation construction process according to claim 3, characterized in that, The drilling information comprises video information, depth information, and angle information of the drill rod.

5. A method of guiding a pile foundation construction process according to claim 4, characterized in that, Step S31 comprises: Taking the depth information of the drill rod as a reference, the video information and the angle information are spliced to obtain the visual real-time drilling geological model.

6. A method of guiding a pile foundation construction process according to claim 5, characterized in that, The visual real-time drilling geological model comprises a real-time three-dimensional model, real-time rock-soil layer distribution information, and real-time karst cave distribution information, and takes the real-time three-dimensional model as a reference to mark the real-time rock-soil layer distribution information and the real-time karst cave distribution information, the dynamic cursor being located at the bottom end of the real-time three-dimensional model.

7. The guiding method of a pile foundation construction process according to claim 1, characterized in that, The step S4 comprises: When the dynamic cursor coincides with any key node, an alarm is issued.

8. The method of guiding a pile foundation construction process according to claim 1, wherein The step S4 comprises: When the dynamic cursor does not coincide with any key node but the drill rod is abnormal, an alarm is issued and feedback is provided.

9. A guiding device in a pile foundation construction process, characterized in that The method comprises the following steps: A visual advanced geological model acquisition module is configured to obtain a visual advanced geological model based on advanced information of geological survey; A drilling information acquisition module is configured to obtain real-time drilling information at the drill rod; A comparison module is configured to compare the visual advanced geological model and the real-time drilling information in real time; A response module is configured to respond to the comparison result; The comparison module comprises: A visual real-time drilling geological model is obtained based on the drilling information; Key nodes are set at the interfaces of multiple rock-soil layers or karst caves in the visual advanced geological model; A dynamic cursor is set on the visual real-time drilling geological model, the dynamic cursor representing the actual depth of the drill rod; The dynamic cursor and any key node are compared in real time based on the advancement of the drill rod.

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