Complex stratum precast pile construction method based on BIM technology

Abstract

The invention relates to a complex stratum precast pile construction method based on a BIM (Building Information Modeling) technology. The complex stratum precast pile construction method comprises the following steps: step 1, site leveling; 3, according to a design blueprint, a pile foundation planar graph and a foundation elevation drawing are obtained; fourthly, the three BIM models are combined, and pile length information of the pipe pile foundation is obtained; 5, the pile length information is sent to a pipe factory, and the factory formulates a production plan for machining and production; 6, a pile foundation design information table containing pile position numbers, positioning coordinates, pile matching information and pile top construction elevations is generated at the same time so as to guide site construction; and seventhly, after production of each batch of tubular piles is completed, the tubular piles are sent to a construction site for pile foundation construction. By means of the method, high-position pile cutting, construction difficulty increasing and potential safety hazards caused by inaccurate pre-judgment of the bearing stratum depth are reduced or avoided, pipe pile waste is reduced, engineering precast pile assembling is accurate, and the requirement of a construction site is met.

Description

Technical Field

[0001] The present invention relates to the field of foundation pile construction for ground foundations, specifically a construction method for precast piles in complex strata based on BIM technology. Background Art

[0002] In pile foundation projects, the construction length of precast piles needs to determine the pile foundation type and length according to the geological conditions in the geological exploration report. Especially for end-bearing piles mainly relying on the bearing stratum of the foundation, the depth and thickness of the geological bearing stratum directly affect the length of the pile matching for the pile foundation. In some sites with complex geology, the distribution of the geological bearing stratum is uneven, or the exploration spacing in the geological exploration report is too large, unable to truly reflect the actual distribution of geological soil layers, resulting in the inability to accurately predict the required pile length for precast pile construction. According to the specification requirements, the fewer joints for a single set of piles, the better. Therefore, during the construction of end-bearing pile foundations, it is necessary to accurately judge the depth of the bearing stratum as much as possible, and calculate the length of the pile foundation by combining the pile top elevation designed in the blueprints, so as to reduce the number of pipe pile segments. When the depth of the bearing stratum cannot be accurately judged, it may cause inaccurate pile matching, resulting in frequent use of short piles, increasing the number of joints and leaving potential quality hazards; if more long piles are used, it is easy to have the problem of excessive exposed pile heads, and high-position pile cutting is required, which requires the cooperation of elevated equipment and cranes for pile cutting, resulting in difficult operation, increased costs, and waste of pipe materials; or due to inaccurate judgment of the bearing stratum, it may increase the difficulty of controlling the pile stopping standard. For impact piles, over-vibration may occur, and for jacked piles, over-pressure may occur, both of which may cause problems with damaged pile heads of pipe piles. Summary of the Invention

[0003] The present invention aims to overcome the defects of the prior art and provides a construction method for precast piles in complex strata based on BIM technology, to solve the problems of inaccurate pile matching for precast piles in projects with complex geological conditions, large fluctuations in the bearing stratum, or missing or incomplete geological exploration reports, and the inability of the manufacturer's supply to meet the construction site requirements.

[0004] To solve the above technical problems, the present invention is implemented as follows: A construction method for precast piles in complex strata based on BIM technology, characterized by including the following steps: Step 1: Level the site to ensure that the pile foundation construction machinery can be used for construction, and then use BIM software to measure and draw a contour map model to truly reflect the actual elevation of the on-site ground. Step 2: Based on the existing geological exploration report, use BIM software to draw a distribution map model of the bearing stratum required for pile foundation design. Step 3: Based on the pile foundation plan and foundation elevation drawing in the design blueprints, draw a drawing with pile position numbers and plane pile foundation positioning coordinates. Step 4: Merge the above three BIM models, overlay and stack the three sets of drawings. Based on the length of the pile top entering the structural foundation as the pile top elevation and the depth of the pile bottom entering the bearing stratum as the pile bottom elevation, obtain the effective pile length. According to the foundation embedment depth, determine the buried depth of the pile top soil layer, and then based on the construction capacity of the on-site pile foundation machinery and the capacity of the pile driving length, determine the elevation of the actual construction pile top. In summary, obtain the pile length information of the pipe pile foundation. Step 5: Send the pile length information to the pipe factory. The factory determines the optimal pile foundation matching table based on its production and processing capacity, considering factors such as road transportation restrictions, and then feeds back to the site for confirmation and correction. At the construction site, a sectional (regional) construction plan is also formulated and fed back to the factory. The factory formulates a production plan and proceeds with processing and production. Step 6: Simultaneously generate a pile foundation design information table containing pile position numbers, positioning coordinates, pile matching information, and pile top construction elevations to guide on-site construction. Step 7: After each batch of pipe piles is produced, they are sent to the construction site for pile foundation construction.

[0005] The described construction method of precast piles in complex strata based on BIM technology is characterized in that Step 7 specifically includes: making construction records for each set of piles. After each batch of pipe piles is constructed, import the depth data of the bearing stratum actually encountered during the construction of the pipe piles into the bearing stratum distribution map model of the BIM software to correct the bearing stratum. The pile bottom bearing stratum of each set of piles is regarded as a bearing stratum distribution point. Use the fitting function of the BIM software for multiple distribution points to fit into a smooth curve, and then fit multiple curves into a smooth surface to obtain data on the distribution of the geological bearing stratum in this area that is closer to the actual situation. Thus, correct the pile length information in this area and feed it back to the factory. The factory adjusts the pile matching length, sends it to the site for confirmation and correction, the site formulates a construction plan, the factory formulates (adjusts) a production plan, and produces, cycling in turn until all pile foundation construction at the site is completed.

[0006] The described construction method of precast piles in complex strata based on BIM technology is characterized in that: the more the number of pile foundations for construction, the more accurate the obtained geological bearing stratum data and the more practical the pile length information. On the premise of ensuring construction quality, when formulating the construction plan, before large-scale construction in each site area, arrange scattered pile foundation construction first to obtain relatively reasonable bearing stratum and pile length information in this area and feed it back to the factory.

[0007] The described construction method of precast piles in complex strata based on BIM technology is characterized in that: the above collaborative operation between the factory and the site is completed in a collaborative office software including the construction unit site and the production factory unit, forming complete data records, modification records, approval confirmation records, construction plans, production plans, and other data and process management records.

[0008] A construction method of precast piles in complex strata based on BIM technology is characterized in that: when a certain pipe pile is damaged and needs to be replenished due to operation errors or other reasons on site, only the corresponding pile number in the previously generated pile information table needs to be used in the collaborative software to initiate a replenishment production application to the manufacturer.

[0009] The beneficial effects of the present invention are as follows: It can be seen from the above technical solutions that the present application provides a construction method of precast piles in complex strata based on BIM technology, which is applicable to the construction of end-bearing precast piles. Its advantages are that through a large number of actual on-site pile foundation construction data, the depth of the bearing stratum of the geological soil layer is verified and corrected, making the required length of the pipe pile closer to the actual demand, improving the connection between the construction site and the manufacturer, and the processed pipe piles can better meet the on-site requirements. Production is carried out in batches according to the progress plan, reasonably allocating the production capacity of the manufacturer and reducing the warehousing cost of the manufacturer's warehouse. It reduces or avoids the situation of high-position pile cutting caused by inaccurate prediction of the depth of the bearing stratum, increasing the construction difficulty and potential safety hazards, and reducing the waste of pipe piles; it avoids the situation where when the pile driving reaches below the ground level of the soil layer but still does not reach the bearing stratum, it is necessary to excavate the soil for pile connection operations; because the approximate position of the bearing stratum can be predicted in advance, the construction process parameters such as the hammering force or the pressure of the pile press can be adjusted in advance, reducing the construction time, accelerating the progress, and avoiding the situation where the pile head is damaged due to excessive construction pressure when suddenly encountering the bearing stratum. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described in detail below with reference to the drawings and embodiments: Figure 1 It is a schematic flow chart of the present application. SPECIFIC EMBODIMENTS

[0011] The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope claimed by the present application. As Figure 1 shown: A construction method of precast piles in complex strata based on BIM technology is characterized in that it includes the following steps: Step 1: Level the site to ensure that the pile foundation construction machinery can be constructed as the standard, and then use BIM software to measure and draw a contour map model to truly reflect the actual elevation of the on-site site; Step 2: Based on the existing geological exploration report, use BIM software to draw a bearing stratum distribution map model required by the pile foundation design; Step 3: According to the pile foundation plan and foundation elevation drawing of the design blueprint, draw a drawing with pile position numbers (numbered according to different pile foundation types) and plane pile foundation positioning coordinates; Step 4: Combine the above three BIM models, overlay and stack the three drawings. Based on the length of the pile top entering the structural foundation as the pile top elevation and the depth of the pile bottom entering the bearing stratum as the pile bottom elevation, obtain the effective pile length; according to the foundation burial depth, determine the burial depth of the pile top soil layer, and then based on the construction capacity of the on-site pile foundation machinery and the capacity of the pile driving length, determine the elevation of the actual construction pile top. In summary, obtain the pile length information of the pipe pile foundation.

[0012] Step 5: Send the pile length information to the pipe factory. The factory determines the optimal pile foundation matching table according to its production and processing capacity, considering factors such as road transportation restrictions, and then feedbacks it to the site for confirmation and correction; the construction site simultaneously formulates a segmented (sub-region) construction plan and feedbacks it to the factory. The factory formulates a production plan and proceeds with processing and production; Step 6: Simultaneously generate a pile foundation design information table containing pile position numbers, positioning coordinates, pile matching information, and pile top construction elevation to guide on-site construction.

[0013] Step 7: After each batch of pipe piles is produced, they are sent to the construction site for pile foundation construction. Keep records of the construction of each set of piles. After each batch of pipe piles is constructed, import the bearing stratum depth data actually encountered during the construction of the pipe piles into the bearing stratum distribution map model of the BIM software to correct the bearing stratum; the pile bottom bearing stratum of each set of piles is regarded as a bearing stratum distribution point. Use the fitting function of the BIM software to fit multiple distribution points into a smooth curve, and then fit multiple curves into a smooth surface to obtain data on the bearing stratum distribution in this area that is closer to the actual situation. Thus, correct the pile length information in this area and feedback it to the factory. The factory adjusts the pile matching length, sends it to the site for confirmation and correction, the site formulates a construction plan, the factory formulates (adjusts) a production plan, and production... cycle in turn until all pile foundation construction at the site is completed.

[0014] Step 8: The more pile foundations are constructed, the more accurate the geological bearing stratum data obtained and the more practical the pile length information. On the premise of ensuring construction quality, when formulating the construction plan, before large-area construction in each site area, arrange scattered pile foundation construction first to obtain relatively reasonable bearing stratum and pile length information in this area and feedback it to the factory.

[0015] Step 9: The above collaborative operations between the factory and the site are completed in the collaborative office software including the construction unit (site) and the production factory unit, forming complete data records, modification records, approval and confirmation records, construction plans, production plans, and other data and process management records. It can be traced back and provide Step Ten: When a certain pipe pile is damaged and needs to be replenished due to operational errors or other reasons on site, simply initiate a replenishment production application to the manufacturer in the collaborative software using the corresponding pile number in the previously generated pile information table.

[0016] The above are only the embodiments provided by this application and are not used to limit this application. Although this application has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A complex stratum prefabricated pile construction method based on BIM technology, characterized in that It includes the following steps: Step 1: Level the site to ensure that the pile foundation construction machinery can be used for construction, and then use BIM software to measure and draw a contour map model to truly reflect the actual elevation of the site; Step 2: Based on the existing geological survey report, use BIM software to draw the bearing layer distribution model required by the pile foundation design; Step 3: Draw a drawing with pile position numbers and plane pile foundation positioning coordinates based on the design blueprint pile foundation plan and foundation elevation drawings; Step 4: Combine the above three BIM models, overlap and overlay the three drawings, and use the length of the pile top entering the structural foundation as the pile top elevation and the depth of the pile bottom entering the bearing layer as the pile bottom elevation to obtain the effective pile length; determine the buried depth of the soil layer at the pile top according to the foundation buried depth, and then determine the actual construction pile top elevation based on the capacity of the on-site pile foundation machinery construction and the capacity of the pile delivery length; in summary, obtain the pile length information of the pipe pile foundation; Step 5: Send the pile length information to the pipe manufacturer. The manufacturer determines the optimal pile foundation allocation table based on its production and processing capacity and road transportation restrictions, and then feeds it back to the site for confirmation and correction. At the same time, the construction site formulates a section (region) construction plan and feeds it back to the manufacturer. The manufacturer formulates a production plan and carries out processing and production. Step 6: Generate a pile foundation design information table including pile position number, positioning coordinates, pile matching information, and pile top construction elevation to guide on-site construction; Step 7: After each batch of pipe piles is produced, it is sent to the construction site for pile foundation construction.

2. The method for constructing prefabricated piles in complex strata based on BIM technology according to claim 1, characterized in that: Step 7 specifically includes: keeping records of each set of pile construction, and after each batch of pipe piles are constructed, importing the bearing layer depth data encountered in the actual construction of the pipe piles into the bearing layer distribution model of the BIM software to correct the bearing layer; the bearing layer at the bottom of each set of piles is regarded as a bearing layer distribution point, and multiple distribution points are fitted into a smooth curve using the fitting function of the BIM software, and then multiple curves are fitted into a smooth surface, so as to obtain data that is closer to the actual distribution of the geological bearing layer in the area. The pile length information in the area is corrected and fed back to the manufacturer, who adjusts the length of the piles, sends them to the site for confirmation and correction, formulates a construction plan on site, and the manufacturer formulates (adjusts) the production plan, produces, and repeats in sequence until all pile foundation construction is completed on site.

3. The method for constructing prefabricated piles in complex strata based on BIM technology according to claim 1, characterized in that: The more pile foundations are constructed, the more accurate the geological bearing layer data obtained and the more practical the pile length information. Under the premise of ensuring construction quality, when formulating the construction plan, before large-scale construction in each site area, dispersed pile foundation construction should be arranged first to obtain relatively reasonable bearing layer and pile length information in the area and feedback to the manufacturer.

4. The method for constructing prefabricated piles in complex strata based on BIM technology according to claim 1, characterized in that: The above-mentioned collaborative work between manufacturers and on-site workers is completed in the collaborative office software that includes the construction unit site and the manufacturer unit, forming complete data records, modification records, approval confirmation records, construction plans, production plans and other data and process management records.

5. The method for constructing prefabricated piles in complex strata based on BIM technology according to claim 1, characterized in that: When a pipe pile is damaged and needs to be replaced due to operational errors or other reasons on site, it is only necessary to enter the corresponding pile number in the pile information table generated above in the collaborative software and initiate a supplementary production application to the manufacturer.

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