CN-122016480-A - In-situ test method for underwater load plate

CN122016480ACN 122016480 ACN122016480 ACN 122016480ACN-122016480-A

Abstract

The invention discloses an in-situ test method of an underwater load plate, which relates to the technical field of geological investigation and comprises the steps of selecting an underwater test point and recording the water depth, water quality and foundation surface state of the underwater test point, cleaning and leveling the foundation surface of the underwater test point to obtain a stable in-situ foundation surface, setting an in-situ test module of the underwater load plate, executing dynamic self-leveling treatment of multi-point multi-dimensional settlement response difference to form a uniform contact state, executing interface water film active displacement and force transmission stability establishment treatment based on the uniform contact state to form an effective force transmission interface state, executing graded loading and recording settlement data corresponding to each stage loading to form a load settlement response data sequence. The invention forms a complete and continuous test data chain, so that the bearing capacity and deformation characteristics of the foundation can be systematically identified and evaluated, and reliable test and result output of the underwater foundation engineering performance are realized.

Inventors

DU KUI
LV JING
ZHANG XIANG
LI BING
SHEN YALUN
HE ZHIPAN
HU BIN
WANG PENGBO
LIU FANG
NI MINGFU
LI YANDA
LIU YUPING
ZUO YONGHUI
LIU DONGYONG
LI CHUNYU
MA JIANWEI
HE SHENG
XU JINGBIN
ZHANG CHEN
Tu Shiji

Assignees

中国电建集团昆明勘测设计研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (10)

1. The in-situ test method for the underwater load plate is characterized by comprising the steps of selecting an underwater test point and recording the water depth, water quality and foundation surface state of the underwater test point; Performing foundation surface cleaning and leveling treatment on the underwater test points to obtain a stable in-situ foundation surface, setting an underwater load plate in-situ test module, and executing dynamic self-leveling treatment of multi-point multi-dimensional sedimentation response difference to form a uniform contact state; performing interface water film active displacement and force transmission stability establishment processing based on the uniform contact state to form an effective force transmission interface state, performing graded loading and recording sedimentation data corresponding to each level of loading to form a load sedimentation response data sequence; Judging termination loading based on the load settlement response data sequence, stopping loading when the termination condition is met, forming a termination loading state, executing grading unloading, recording rebound data, and forming unloading rebound response data; And (3) carrying out data arrangement and analysis based on the unloading rebound response data to form a foundation bearing capacity and deformation characteristic analysis result, and generating an in-situ test report of the underwater water carrier plate and outputting a test result.
2. The method for in-situ testing of an underwater load board of claim 1, wherein said recording underwater test points comprises, The method comprises the steps of acquiring the position range of an underwater test point, positioning the position range of the acquired underwater test point to obtain the underwater test point, measuring the water depth of the underwater test point to obtain the water depth, and detecting the water quality of the underwater test point and the water depth to obtain the water quality; and observing the surface state of the foundation based on the underwater test point, the water depth and the water quality to obtain the surface state of the foundation.
3. The method for in-situ testing of an underwater load board of claim 2, wherein said providing an in-situ test module of an underwater load board comprises, Carrying out impurity recognition on the foundation surface based on the underwater test points to obtain the impurity distribution condition of the foundation surface, and cleaning the foundation surface of the underwater test points to obtain the cleaned foundation surface; Performing foundation surface leveling treatment on the underwater test points based on the cleaned foundation surfaces to obtain leveled foundation surfaces, and performing surface stability detection on the underwater test points to obtain stable in-situ foundation surfaces; and laying an in-situ test module of the underwater load plate on the basis of the stable in-situ foundation surface at the underwater test point.
4. The method for in-situ testing of an underwater load board of claim 3, wherein said forming a uniform contact state comprises, Preloading is applied to a load plate based on an underwater load plate in-situ test module, sedimentation response data of a plurality of positions are collected, and multi-point sedimentation response data are formed; Calculating sedimentation response differences between different positions based on the multi-point sedimentation response data to obtain multi-point multi-dimensional sedimentation response differences; The multi-point multidimensional sedimentation response difference expression is: ; Wherein, the Is the first The settlement observation position and the first The positions of settlement observation are at the moment Is characterized by a poor sedimentation response of (a), Is the first The positions of settlement observation are at the moment Is used for the sedimentation response data of the (a), Is the first The positions of settlement observation are at the moment Is used for the sedimentation response data of the (a), For the numbering of the sedimentation observation positions, Is the first to Another sedimentation observation position different from the one sedimentation observation position, The time is the moment; Judging the contact state between the load plate and the stable in-situ foundation surface through the multi-point multi-dimensional settlement response difference to obtain a contact state judgment result, and carrying out posture adjustment or stress adjustment on the load plate to obtain adjusted settlement response data; Calculating the multi-point multi-dimensional sedimentation response difference again based on the adjusted sedimentation response data, and repeating the contact state judgment and the dynamic self-leveling treatment until the multi-point multi-dimensional sedimentation response difference meets the preset consistency condition to form a uniform contact state; First, the After the wheel dynamic self-leveling treatment, the multi-point multidimensional sedimentation response difference expression is as follows: ; Wherein, the In order to achieve this, the first and second, Is the first After the dynamic self-leveling treatment of the wheel, the first The positions of settlement observation are at the moment Is set up to the post-adjustment sedimentation response data, Is the first After the dynamic self-leveling treatment of the wheel, the first The positions of settlement observation are at the moment Is set up to the post-adjustment sedimentation response data, The number of rounds for the dynamic self-leveling process.
5. The method for in-situ testing of an underwater load board of claim 4, wherein said effective force transfer interface state comprises, Applying a preset constant pre-pressing load to the load plate based on the uniform contact state to obtain a pre-pressing load action state, and identifying the interface water film distribution condition between the load plate and the stable in-situ foundation surface to obtain an interface water film distribution state; Performing active displacement treatment on the interface water film under the action of the pre-pressing load to obtain a displacement state of the interface water film, and continuously monitoring the sedimentation change of the load plate to obtain a sedimentation change trend; And judging the force transfer stability between the load plate and the stable in-situ foundation surface based on the sedimentation change trend, and obtaining a force transfer stability state.
6. The method for in-situ testing of an underwater load board of claim 5, wherein said load-settlement response data sequence comprises, Setting a grading loading grade based on the effective force transfer interface state to obtain a grading loading grade, and applying load step by step to a load plate to obtain loading states of all levels; And carrying out sedimentation observation on the corresponding positions of the load plates based on the loading states of all levels to obtain sedimentation data corresponding to the loading states of all levels, and sequentially sorting according to the grading loading levels to obtain a load sedimentation response data sequence.
7. The method of in-situ testing of an underwater load board of claim 6, wherein said terminating the loading state comprises, Sequentially extracting sedimentation data corresponding to each stage of loading according to the sequence of the staged loading based on the load sedimentation response data sequence, and reflecting the change rule of sedimentation along with the increase of loading by comparing the sedimentation change amplitude and the change direction between adjacent loading grades to obtain a sedimentation change trend; Comparing and analyzing the sedimentation change trend with a preset termination condition to obtain a termination condition judgment result; And stopping loading when the termination condition is met based on the termination condition judgment result to obtain a stop loading result, and confirming the current loading state to obtain a termination loading state.
8. The method of in-situ testing an underwater load board of claim 7, wherein said unloading rebound response data comprises, Determining a grading unloading grade based on the termination loading state, outputting the grading unloading grade, and gradually reducing the load according to a preset sequence to obtain a load value corresponding to each grade of unloading; And carrying out settlement rebound observation at each stage of unloading based on the load values corresponding to each stage of unloading to obtain rebound data corresponding to each stage of unloading, sequentially sorting according to the grading unloading grades to obtain unloading rebound response data, and forming unloading rebound response data.
9. The method for in-situ testing of an underwater load board according to claim 8, wherein the analysis result of the load carrying capacity and deformation characteristics of the foundation comprises, Sorting and sorting the rebound data corresponding to each stage of unloading based on the unloading rebound response data to obtain sorted unloading rebound response data, and analyzing the rebound change rule corresponding to each stage of unloading to obtain rebound change characteristics; comprehensively analyzing the overall deformation behavior of the foundation based on rebound change characteristics and load settlement response data sequences to obtain deformation characteristic analysis results; And judging the bearing capacity of the foundation based on the deformation characteristic analysis result and the load settlement response data sequence to obtain the bearing capacity of the foundation and the deformation characteristic analysis result.
10. The method of in-situ testing of an underwater load board of claim 9, wherein the test results comprise, Summarizing and sorting all analysis contents based on foundation bearing capacity and deformation characteristic analysis results to obtain summarized and sorting results, and arranging test process information, analysis contents and results to obtain an in-situ test report of the underwater water carrier; and extracting a target conclusion based on the in-situ test report of the underwater water carrier plate to obtain a test result.

Description

In-situ test method for underwater load plate Technical Field The invention relates to the technical field of geological investigation, in particular to an in-situ test method for an underwater load plate. Background With the development of ocean engineering and underwater infrastructure construction, the in-situ test requirements for the bearing capacity and deformation characteristics of the underwater foundation are continuously increased. The in-situ test method of the underwater load board is an important test means developed on the basis of the land load board test, and the relationship between the load and the settlement is obtained by selecting the underwater test points, cleaning the surface of the foundation, arranging the load board and carrying out graded loading, so that the bearing capacity and the deformation characteristic of the foundation are analyzed. The prior art can realize the test operation in the underwater environment to a certain extent, and forms a more mature test flow. In practical application, the existing in-situ test method for the underwater load plate usually defaults that the load plate can be in effective contact with the surface of the foundation directly, but due to factors such as water films, floating mud layers, uneven surfaces and the like in the underwater environment, the contact state and force transmission condition between the load plate and the foundation can be unstable, so that the authenticity of sedimentation data and the accuracy of test results are affected. Therefore, the control of contact uniformity and interface force transfer stability in the initial stage of the test in the prior art is still to be further improved. Disclosure of Invention The present invention has been made in view of the above-described problems occurring in the prior art. Therefore, the invention provides an in-situ test method for the underwater load plate, which solves the problem that the accuracy of a test result is affected due to uneven contact between the underwater load plate and a foundation and unstable interfacial force transmission. In order to solve the technical problems, the invention provides the following technical scheme: in a first aspect, the invention provides an in-situ test method for an underwater load plate, which comprises the steps of selecting an underwater test point and recording the water depth, water quality and foundation surface state of the underwater test point; Performing foundation surface cleaning and leveling treatment on the underwater test points to obtain a stable in-situ foundation surface, setting an underwater load plate in-situ test module, and executing dynamic self-leveling treatment of multi-point multi-dimensional sedimentation response difference to form a uniform contact state; performing interface water film active displacement and force transmission stability establishment processing based on the uniform contact state to form an effective force transmission interface state, performing graded loading and recording sedimentation data corresponding to each level of loading to form a load sedimentation response data sequence; Judging termination loading based on the load settlement response data sequence, stopping loading when the termination condition is met, forming a termination loading state, executing grading unloading, recording rebound data, and forming unloading rebound response data; And (3) carrying out data arrangement and analysis based on the unloading rebound response data to form a foundation bearing capacity and deformation characteristic analysis result, and generating an in-situ test report of the underwater water carrier plate and outputting a test result. As a preferable scheme of the underwater load plate in-situ test method, the recording of the underwater test points comprises, The method comprises the steps of acquiring the position range of an underwater test point, positioning the position range of the acquired underwater test point to obtain the underwater test point, measuring the water depth of the underwater test point to obtain the water depth, and detecting the water quality of the underwater test point and the water depth to obtain the water quality; and observing the surface state of the foundation based on the underwater test point, the water depth and the water quality to obtain the surface state of the foundation. As a preferable scheme of the in-situ test method for the underwater load plate, the in-situ test module for the underwater load plate comprises the following steps of, Carrying out impurity recognition on the foundation surface based on the underwater test points to obtain the impurity distribution condition of the foundation surface, and cleaning the foundation surface of the underwater test points to obtain the cleaned foundation surface; Performing foundation surface leveling treatment on the underwater test points based on the cleaned foundation surfaces to obtain leveled foun