CN-122013746-A - Pressure distribution adjusting method for plain soil compaction pile construction

CN122013746ACN 122013746 ACN122013746 ACN 122013746ACN-122013746-A

Abstract

The invention discloses a pressure distribution adjusting method for plain soil compaction pile construction, which relates to the technical field of pressure adjustment and is used for solving the problems of uneven soil compactness distribution and increased stress diffusion unbalance degree, hydraulic driving characteristics are evaluated and response Shi Gongfen domains are divided by monitoring hydraulic flow data of a companding propulsion device, propulsion feedback resistance of each domain is obtained, pressure release control processing is carried out on the response Shi Gongfen domains, slip rebound data are collected, domain screening and marking are carried out by combining the propulsion feedback resistance after rebound convergence state is analyzed, neighborhood penetration resistance data of a mark domain is extracted, the compaction grade of a surrounding domain is evaluated, a construction path sequence is generated, domain distribution coefficient is set according to the construction path sequence, domain propulsion loading pressure is corrected, domain regulation and dynamic optimization of pressure distribution are realized, and compaction uniformity and construction stability are improved.

Inventors

SHAO GUIBIN
WANG DUOJUN
GAO CHENGHAO
LIU YUAN
LIU XIANG
WANG ZIBO
YU ZELI
WANG BIN
SUN HAIFENG
JIN HONGQIANG
LI BO
YUAN LONG
PEI ZHAOTANG
Jiao Xinwu
GUO HAOLEI

Assignees

中国市政工程西北设计研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260302

Claims (9)

1. The pressure distribution adjusting method for plain soil compaction pile construction is characterized by comprising the following steps of: Step S1, monitoring hydraulic flow data of a companding propulsion device and analyzing hydraulic driving characteristics when compaction construction is carried out on a region to be compacted, dividing a response Shi Gongfen region according to the hydraulic driving characteristics, and detecting propulsion feedback resistance of a response Shi Gongfen region; Step S2, performing pressure release control processing on a response Shi Gongfen domain, setting observation time, collecting slip rebound data of the response Shi Gongfen domain in the observation time, analyzing rebound convergence state by utilizing the slip rebound data, and screening and marking the response Shi Gongfen domain by combining propulsion feedback resistance; S3, accessing a construction monitoring information base to call neighborhood penetration resistance data of a mark response Shi Gongfen domain, evaluating the compaction grade of the surrounding domain based on the neighborhood penetration resistance data and generating a construction path sequence of the mark response Shi Gongfen domain; And S4, detecting the propelling loading pressure of the mark response Shi Gongfen domain, setting a domain distribution coefficient according to the construction path sequence, and correcting the propelling loading pressure of the mark response Shi Gongfen domain by using the domain distribution coefficient.
2. The pressure distribution adjusting method for construction of plain soil compaction piles according to claim 1, wherein the method comprises the following steps: In the step S1, when compaction construction is carried out on plain soil compaction piles in a region to be compacted by using a companding propulsion device, a flow acquisition period is preset and divided into a plurality of acquisition moments; Monitoring the instantaneous volume flow of the companding propulsion equipment through a flow sensor at each acquisition time, and taking the instantaneous volume flow as hydraulic flow data; The hydraulic flow data are sequenced in an ascending order according to the numerical value of the hydraulic flow data and are combined into a hydraulic flow set, a first dividing proportion and a second dividing proportion are preset, corresponding quantity of hydraulic flow data in the hydraulic flow set are respectively selected according to the first dividing proportion and the second dividing proportion, and the flow dividing width is calculated according to the selection result; and taking the ratio of the flow dividing width to the preset flow acquisition period as the hydraulic driving characteristic of the plain soil compaction pile.
3. The pressure distribution adjusting method for construction of plain soil compacting piles according to claim 2, wherein the method comprises the following steps: in step S1, comparing the hydraulic driving characteristics with a preset hydraulic driving threshold, and dividing the area to be compacted into a response Shi Gongfen area; if the hydraulic driving characteristic is larger than a preset hydraulic driving threshold, taking the plain soil compaction pile as a response Shi Gongfen field; otherwise, the plain soil compaction pile is not used as a response Shi Gongfen field; detecting a hydraulic pressure value of a working cavity of the propulsion cylinder by a pressure sensor in a cavity of the propulsion cylinder in the companding propulsion equipment, and accessing an equipment parameter configuration table to call an effective pressure receiving area of a piston of the propulsion cylinder; the product of the hydraulic pressure value and the effective pressure area of the ram piston acts as a ram feedback resistance in response Shi Gongfen fields.
4. The pressure distribution adjusting method for construction of plain soil compaction piles according to claim 1, wherein the method comprises the following steps: In step S2, performing pressure release control processing on the response Shi Gongfen field, specifically, for the response Shi Gongfen field, stopping forward pushing of the pushing cylinder in the companding pushing device, and simultaneously releasing the loading pressure in the working chamber; Presetting observation time and dividing the observation time into a plurality of observation moments, acquiring axial displacement of a propulsion member in the companding propulsion equipment in the axial direction at each observation moment through a displacement sensor, and performing difference calculation on the axial displacement of adjacent observation moments to obtain slip rebound data; sequencing the slipping rebound data according to a time sequence, combining the slipping rebound data into a slipping rebound sequence, and calculating to obtain an accumulated rebound displacement value corresponding to the current observation time according to the slipping rebound data of the current observation time and the previous observation time in the slipping rebound sequence; and marking the observation time corresponding to the maximum value of the absolute value of the accumulated rebound displacement value, and calculating the slip rebound data after marking the observation time to obtain the residual rebound fluctuation.
5. The pressure distribution adjusting method for construction of plain soil compacting piles according to claim 4, wherein the method comprises the following steps: in step S2, the ratio of the residual rebound fluctuation amount to the maximum value of the absolute value of the cumulative rebound displacement value is taken as the rebound convergence index; If the rebound convergence index is greater than the preset rebound convergence threshold, responding Shi Gongfen to the rebound convergence state of the domain to be a low-convergence rebound state; Otherwise, the rebound convergence state of the response Shi Gongfen domain is a high-convergence rebound state; calculating to obtain a propulsion feedback resistance threshold according to each propulsion feedback resistance; if the propulsion feedback resistance is greater than the propulsion feedback resistance threshold, determining that the response Shi Gongfen domain is in a high-constraint stressed state; otherwise, determining that the response Shi Gongfen domain is in a low-constraint stress state; Marking the response Shi Gongfen domain when the rebound convergence state of the response Shi Gongfen domain is a low convergence rebound state and is in a low constraint stress state; otherwise, the response Shi Gongfen is not field marked.
6. The pressure distribution adjusting method for construction of plain soil compacting piles according to claim 5, wherein the method comprises the following steps: in step S3, after obtaining a marking response Shi Gongfen domain, accessing a construction monitoring information base to call neighborhood penetration resistance data of the marking response Shi Gongfen domain; The construction monitoring information base is a database used for storing history and real-time monitoring data in a construction site data management system; The penetration resistance data refer to axial resistance values recorded by penetration equipment in a unit penetration depth in the construction process of the plain soil compaction pile; carrying out arithmetic average on neighborhood penetration resistance data of a mark response Shi Gongfen domain to obtain neighborhood average penetration resistance; And further calculating the standard deviation of the neighborhood penetration resistance to obtain the penetration resistance discrete coefficient.
7. The pressure distribution adjusting method for construction of plain soil compacting piles according to claim 6, wherein the method comprises the following steps: In step S3, constructing a surrounding area compaction grade by adopting a weighted difference method based on the neighborhood average penetration resistance and the penetration resistance discrete coefficient; Carrying out extremum normalization processing on the surrounding area compactness grade of the mark response Shi Gongfen area by adopting a Min-Max normalization formula to obtain a normalized surrounding area compactness coefficient; Constructing a path priority evaluation function based on the normalized surrounding area compaction coefficient and the rebound convergence index by adopting a weighted summation method, and calculating a path priority coefficient; And sorting all marking response Shi Gongfen fields according to the values of the path priority coefficients from large to small, and generating a construction path sequence.
8. The pressure distribution adjusting method for construction of plain soil compaction piles according to claim 1, wherein the method comprises the following steps: In step S4, acquiring a hydraulic pressure value corresponding to a current marking response Shi Gongfen domain in real time through a pressure sensor arranged in a working cavity of the propulsion cylinder; Accessing a device parameter configuration table to call the effective pressure area of a piston of the thrust cylinder, multiplying the effective pressure area by the average hydraulic pressure to calculate the axial loading force of the current sub-domain; Sequentially numbering the marking response Shi Gongfen domains according to the construction path sequence generated in the step S3 to obtain domain-dividing sequence positions; Constructing path weight coefficients based on the sub-domain sequence bits: ; Wherein, the As the path weight coefficient(s), To mark the total number of fields of the response Shi Gongfen, Is a domain-separated order bit.
9. The pressure distribution adjusting method for construction of plain soil compacting piles according to claim 8, wherein the method comprises the following steps: In step S4, a domain allocation coefficient is constructed based on the path weight coefficient and the path priority coefficient: ; Wherein, the The coefficients are adapted for the domain division and, As the path weight coefficient(s), Is a path priority coefficient; Setting a maximum allowable allocation upper limit coefficient, and taking the domain allocation coefficient to be equal to the maximum allowable allocation upper limit coefficient when the domain allocation coefficient is larger than the maximum allowable allocation upper limit coefficient; Multiplying the domain-divided allocation coefficient with the original propulsion loading pressure to obtain corrected propulsion loading pressure, taking the corrected propulsion loading pressure as a target pressure set value of the propulsion cylinder, and adjusting the opening of the hydraulic proportional valve through a closed-loop control algorithm to enable the actual hydraulic pressure to be converged to the corrected propulsion loading pressure.

Description

Pressure distribution adjusting method for plain soil compaction pile construction Technical Field The invention relates to the technical field of pressure regulation, in particular to a pressure distribution regulating method for construction of a soil-oriented compaction pile. Background The plain soil compaction pile is used as a common reinforcement mode in the field of foundation treatment, and a compaction propulsion device is used for applying a propulsion action to soil body to enable surrounding soil body to laterally displace and form a compact structure, so that the plain soil compaction pile is widely applied to soft foundation bearing capacity lifting and deformation control engineering. In the existing construction process, the propulsion pressure is controlled through equipment operation parameters and field experience, the construction sequence is generally implemented according to a preset pile position or a fixed path, and the construction monitoring is mainly focused on the record of single-point pressure or penetration resistance. The prior art has the following defects: At present, the prior art mainly carries out construction control according to single propelling pressure or equipment operation experience, lacks a domain identification and pressure cooperative regulation mechanism for response difference of a construction area, easily generates partial over-extrusion or under-extrusion phenomena, causes uneven soil compactness distribution and increased stress diffusion unbalance degree, and reduces foundation reinforcement uniformity and construction stability, so that a pressure distribution regulation method for plain soil compaction pile construction is provided. The above information disclosed in the background section is only for enhancement of understanding of the background of the disclosure and therefore it may include information that does not form the prior art that is already known to a person of ordinary skill in the art. Disclosure of Invention In order to overcome the defects in the prior art, the embodiment of the invention provides a pressure distribution adjusting method for construction of a soil-oriented compaction pile, which solves the problems in the background art by applying a construction domain identification mechanism based on hydraulic driving characteristics, a domain screening strategy combining slip rebound response, a compaction grade evaluation and construction path self-adaptive generation mechanism depending on neighborhood penetration resistance and dynamic allocation control of propelling loading pressure facing domains. In order to achieve the above purpose, the invention provides a pressure distribution adjusting method for construction of a soil compaction pile, which comprises the following steps: Step S1, monitoring hydraulic flow data of a companding propulsion device and analyzing hydraulic driving characteristics when compaction construction is carried out on a region to be compacted, dividing a response Shi Gongfen region according to the hydraulic driving characteristics, and detecting propulsion feedback resistance of a response Shi Gongfen region; Step S2, performing pressure release control processing on a response Shi Gongfen domain, setting observation time, collecting slip rebound data of the response Shi Gongfen domain in the observation time, analyzing rebound convergence state by utilizing the slip rebound data, and screening and marking the response Shi Gongfen domain by combining propulsion feedback resistance; S3, accessing a construction monitoring information base to call neighborhood penetration resistance data of a mark response Shi Gongfen domain, evaluating the compaction grade of the surrounding domain based on the neighborhood penetration resistance data and generating a construction path sequence of the mark response Shi Gongfen domain; And S4, detecting the propelling loading pressure of the mark response Shi Gongfen domain, setting a domain distribution coefficient according to the construction path sequence, and correcting the propelling loading pressure of the mark response Shi Gongfen domain by using the domain distribution coefficient. In a preferred embodiment, in step S1, when the companding propulsion device performs compaction construction on a plain soil compaction pile in a region to be compacted, a flow acquisition period is preset and divided into a plurality of acquisition moments; Monitoring the instantaneous volume flow of the companding propulsion equipment through a flow sensor at each acquisition time, and taking the instantaneous volume flow as hydraulic flow data; The hydraulic flow data are sequenced in an ascending order according to the numerical value of the hydraulic flow data and are combined into a hydraulic flow set, a first dividing proportion and a second dividing proportion are preset, corresponding quantity of hydraulic flow data in the hydraulic flow set are respectively selected ac