CN-121786940-B - Size optimization combination method for complex topography foundation precast pile

CN121786940BCN 121786940 BCN121786940 BCN 121786940BCN-121786940-B

Abstract

The invention relates to the technical field of precast pile size optimization, in particular to a size optimization combination method of a complex topography foundation precast pile, which comprises the steps of collecting valley topography parameters to construct a topography three-dimensional model so as to determine a target piling area and piling points; the method comprises the steps of determining foundation bearing capacity of each point according to soil layering parameters of a region where a pile driving point is located, determining mark substandard point positions based on foundation bearing capacity and preset standard bearing capacity, determining space grade and bearing capacity grade based on mark point position space and bearing capacity difference to determine initial dimensions of precast piles, determining dimension parameters based on the initial dimensions of the precast piles, and simulating pile driving to obtain simulation depth to adjust the dimension parameters of the precast piles. The invention determines the size parameter of the corresponding precast pile through the pile point spacing grade and the bearing capacity grade, and carries out the process of simulating pile driving based on the size parameter of the precast pile so as to adjust the size parameter of the precast pile, thereby solving the problem that the size of the precast pile deviates from the foundation of the complex terrain.

Inventors

YU HUAHUA
Shou Chaopeng
LI XUEYOU

Assignees

浙江鸿创地质科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260304

Claims (10)

1. The size optimization combination method of the complex topography foundation precast pile is characterized by comprising the following steps of: Collecting geomorphic parameters of a valley region, obtaining a geomorphic three-dimensional model based on the geomorphic parameters, determining a target piling area based on the geomorphic three-dimensional model, and determining piling points based on the target piling area; determining the foundation bearing capacity of each pile driving point by combining the distribution characteristics of the pile driving point based on the soil layering parameters of the area where the corresponding pile driving point is located; determining and marking pile driving points with substandard bearing capacity based on a comparison result of the foundation bearing capacity and a preset standard bearing capacity to obtain marked pile driving points; determining initial dimension parameters of corresponding precast piles based on pile point distances between marked pile point positions and foundation bearing capacity differences of adjacent pile point positions, determining pile point distance grades based on the pile point distances and preset influence distances, and determining bearing capacity grades based on absolute values of the bearing capacity differences of the adjacent pile point positions and reference bearing capacities; Determining corresponding precast pile size parameters based on pile point spacing grades and bearing capacity grades, and performing simulated pile driving based on the precast pile size parameters to obtain simulated pile driving depth; adjusting the size parameter of the precast pile based on the comparison result of the simulated pile depth and a preset pile depth threshold; The precast pile size parameters comprise pile diameter and pile length.
2. The method for optimizing and combining the dimensions of the prefabricated pile of the foundation of the complex terrain according to claim 1, wherein the process for obtaining the three-dimensional model of the topography comprises the following steps: Scanning and surveying the target piling area based on the unmanned aerial vehicle to obtain surface parameters of the target piling area, and determining a landform three-dimensional model based on the surface parameters and underground parameters obtained by surveying; Wherein the topographical parameters include the surface parameters and the subsurface parameters.
3. The method for optimizing the combination of dimensions of precast piles for foundation of complex terrain according to claim 2, wherein the process of determining the target pile driving area comprises: And determining a plurality of initial piling areas based on the surface three-dimensional model and the target building area in the landform three-dimensional model, and determining target piling areas based on the target building three-dimensional model and the initial piling areas.
4. A method of optimizing the size of a precast pile for a foundation of a complex terrain according to claim 3, wherein the determining the driving point position comprises: And carrying out regional division on the target piling areas to obtain a plurality of regional target piling areas, moving the target building three-dimensional model to the regional target piling areas, and selecting points of the target building three-dimensional model, wherein the frame supporting points are coincident with the regional target piling areas, so as to obtain piling points.
5. The method for optimizing and combining the dimensions of the foundation precast pile for the complex terrain according to claim 4, wherein the process of determining the foundation bearing capacity of each pile driving point comprises the following steps: determining single-point initial bearing capacity of a corresponding piling point based on the number of soil layering layers, and determining foundation bearing capacity of each piling point based on the soil structure and the single-point initial bearing capacity; wherein the soil layering parameters comprise the number of soil layering layers and the soil texture structure of each layer of soil.
6. The method for optimizing the combination of dimensions of a preformed pile of a foundation of a complex terrain according to claim 5, wherein the process of obtaining the marked pile driving point comprises the steps of: judging that the bearing capacity of the corresponding piling point is not up to the standard based on the fact that the bearing capacity of the foundation is smaller than the preset standard bearing capacity, and marking to obtain a marked piling point; And judging that the bearing capacity of the corresponding piling point reaches the standard based on the fact that the bearing capacity of the foundation is larger than or equal to the preset standard bearing capacity.
7. The method for optimizing and combining dimensions of precast piles for foundation of complex terrain according to claim 6, wherein the process of determining the pile point spacing level comprises: Determining the actual number of the influence intervals based on the comparison result of the pile point intervals and the preset influence intervals, and determining the interval influence level of the pile point intervals on the initial size parameters based on the comparison result of the actual number and the number threshold interval so as to determine the initial size parameters of the precast pile; Determining that the pitch impact level is a primary pitch impact level based on the actual number being less than the number threshold interval minimum; Based on the actual number in a number threshold interval, judging that the interval influence level is a middle interval influence level; determining that the pitch impact level is a high-level pitch impact level based on the actual number being greater than the number threshold interval maximum; The preset influence distance is the shortest distance between marked piling points, which influences the bearing capacity of the foundation.
8. The method for optimizing the combination of dimensions of a preformed pile of a foundation of a complex terrain according to claim 7, wherein said determining the level of bearing capacity comprises: Based on the fact that the absolute value of the bearing capacity difference value of the adjacent point positions is smaller than the minimum value of the bearing capacity difference value threshold interval, judging that the bearing capacity grade is the primary bearing capacity grade; Judging the bearing capacity grade as a middle bearing capacity grade based on the absolute value of the bearing capacity difference value of the adjacent point positions in a bearing capacity difference value threshold value interval; and judging the bearing capacity grade as an advanced bearing capacity grade based on the fact that the absolute value of the bearing capacity difference value of the adjacent point positions is larger than the maximum value of the bearing capacity difference value threshold interval.
9. The method for optimizing and combining the dimensions of precast piles for foundation of complex terrain according to claim 8, wherein the process of determining the dimension parameters of the corresponding precast piles comprises: And determining a first precast pile size parameter based on the current pile point spacing grade and a corresponding spacing grade influence compensation parameter, determining a second precast pile size parameter based on the current bearing capacity grade and a corresponding bearing capacity grade influence compensation parameter, and determining the precast pile size parameter based on the first precast pile size parameter and the second precast pile size parameter.
10. The method for optimizing and combining the dimensions of the precast pile for the foundation of the complex terrain according to claim 9, wherein the process of adjusting the dimension parameters of the precast pile comprises the following steps: Lengthening the pile length according to the difference value between the preset pile depth threshold and the simulated pile depth based on the fact that the simulated pile depth is smaller than the preset pile depth threshold, and determining the size parameter of the precast pile by shortening the pile diameter based on the fact that the increased pile length still does not meet the preset pile depth threshold; determining to maintain the current precast pile size parameter based on the simulated pile depth being greater than or equal to a preset pile depth threshold; The preset piling depth is determined according to soil property conditions corresponding to each soil layer.

Description

Size optimization combination method for complex topography foundation precast pile Technical Field The invention relates to the technical field of precast pile size optimization, in particular to a size optimization combination method of a foundation precast pile in complex terrains. Background As infrastructure construction extends to complex terrain areas such as remote mountainous areas, valley ravines, etc., the geological conditions faced by foundation engineering become progressively worse. The river valley area is used as typical complex terrain representation, has the problems of severe relief, uneven soil layering, scattered gravel distribution, large space difference of foundation bearing capacity and the like, and brings a plurality of challenges to foundation reinforcement construction. The precast pile is widely applied to foundation reinforcement engineering of complex terrains because of the advantages of convenience in construction, stable bearing performance, easiness in quality control and the like, and the rationality of the dimension parameters directly determines the foundation reinforcement effect, engineering safety and construction cost. CN114169064a discloses a method for optimizing and combining the size of a down-the-hole impact cement soil composite precast pile and application thereof, wherein the method comprises the steps of establishing a down-the-hole impact cement soil composite precast pile composite foundation model and evaluating the reliability of the model; setting up the effective pile length of the down-the-hole impact cement-soil composite precast pile under different stratum conditions, setting up the ultimate bearing capacity expression of the down-the-hole impact cement-soil composite precast pile controlled by vertical compressive strength under different stratum conditions, the ultimate bearing capacity expression of the down-the-hole impact cement-soil composite precast pile controlled by soil ultimate side friction resistance under different stratum conditions, the relation between the length and the sectional area of the down-the-hole impact cement-soil composite precast pile, judging whether the size of the concrete core pile meets the checking calculation requirement, and the like. The invention optimizes and combines the length and the sectional area of the concrete core pile under different stratum conditions, so that the vertical compressive strength and the ultimate side friction of the pile soil are coordinated as much as possible, thereby achieving the purpose of saving engineering materials. Therefore, the prior art has the following problems that before construction of a valley area, the size parameters of the precast pile are determined by the pile point spacing grade and the bearing capacity grade, and the process of adjusting the size parameters of the precast pile by simulating pile driving is performed based on the size parameters of the precast pile, so that the size of the precast pile deviates from a complex topography foundation, and the construction safety is affected. Disclosure of Invention Therefore, the invention provides a size optimization combination method of precast piles of a foundation of a complex topography, which is used for solving the problems that the size of the precast pile deviates from the foundation of the complex topography and affects the construction safety due to the lack of determining the size parameters of the corresponding precast pile through the pile point spacing grade and the bearing capacity grade before the construction of the valley area in the prior art, and carrying out simulated piling based on the size parameters of the precast pile so as to adjust the size parameters of the precast pile. In order to achieve the above object, the present invention provides a method for optimizing and combining dimensions of a precast pile for a foundation of a complex terrain, comprising: Collecting geomorphic parameters of a valley region, obtaining a geomorphic three-dimensional model based on the geomorphic parameters, determining a target piling area based on the geomorphic three-dimensional model, and determining piling points based on the target piling area; determining the foundation bearing capacity of each pile driving point by combining the distribution characteristics of the pile driving point based on the soil layering parameters of the area where the corresponding pile driving point is located; determining and marking pile driving points with substandard bearing capacity based on a comparison result of the foundation bearing capacity and a preset standard bearing capacity to obtain marked pile driving points; determining initial dimension parameters of corresponding precast piles based on pile point distances between marked pile point positions and foundation bearing capacity differences of adjacent pile point positions, determining pile point distance grades based on the pile point distances and pres