CN118855006A - A method for monitoring internal forces of inclined supports of lattice columns in foundation pits - Google Patents

A method for monitoring internal forces of inclined supports of lattice columns in foundation pits Download PDF

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Publication number
CN118855006A
CN118855006A CN202411022901.0A CN202411022901A CN118855006A CN 118855006 A CN118855006 A CN 118855006A CN 202411022901 A CN202411022901 A CN 202411022901A CN 118855006 A CN118855006 A CN 118855006A
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CN
China
Prior art keywords
monitoring
lattice column
foundation pit
sensor
internal force
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Pending
Application number
CN202411022901.0A
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Chinese (zh)
Inventor
宋宏军
殷志鹏
王萃志
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Shanghai Baoye Group Corp Ltd
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Shanghai Baoye Group Corp Ltd
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Application filed by Shanghai Baoye Group Corp Ltd filed Critical Shanghai Baoye Group Corp Ltd
Priority to CN202411022901.0A priority Critical patent/CN118855006A/en
Publication of CN118855006A publication Critical patent/CN118855006A/en
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00—Testing foundations or foundation structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/02—Foundation pits
    • E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/10—Miscellaneous comprising sensor means

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

The invention relates to a method for monitoring internal force of a foundation pit lattice column inclined support, which comprises the following steps: determining the number of monitoring points according to the supporting structure design drawing; step two: measuring the distance from the crown beam to the inclined support basic bearing platform and the size of the lattice column, calculating the balance point of the lattice column, marking by scribing, and determining the detection point of the stress meter; step three: welding and fixing the sensor base according to the position of the balance point; step four: installing a sensor; step five: connecting a stress tester with the sensor for calibration and testing; step six: the stress tester is connected with the sensor through the data optical cable, the sensor is installed to obtain the strain value of each position supported along the lattice column, the strain value is monitored and data analysis is carried out, the influence of the load around the foundation pit in the monitored area on the supporting pile and the lattice column is judged according to the change of internal force, and the safety of the foundation pit is ensured. According to the invention, through monitoring and analyzing the internal force of the lattice column inclined support, early warning is carried out in advance, and measures are taken in time to ensure the safety of the foundation pit.

Description

Method for monitoring internal force of foundation pit lattice column inclined support
Technical Field
The invention relates to the field of foundation pit support, in particular to a method for monitoring internal force of a foundation pit lattice column inclined support.
Background
At present, foundation pit support is the key content of engineering construction in deep foundation pit construction, and in the foundation pit construction process, foundation pit support is very critical, and current foundation pit monitoring technology mainly aims at horizontal displacement, perpendicularity deviation data observation deformation condition, only after the foundation pit appears deforming, can carry out analysis according to measured data, then take measures, and the mode has the limitation, can't early warn in advance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a method for monitoring the internal force of a foundation pit lattice column inclined support, and solves the problem that the foundation pit cannot be found before the deformation of the foundation pit.
In order to solve the technical problems, the invention is realized as follows:
a method for monitoring internal force of foundation pit lattice column inclined support comprises the following steps:
step one: determining the number of monitoring points according to the supporting structure design drawing;
Step two: measuring the distance from the crown beam to the inclined support basic bearing platform and the size of the lattice column, calculating the balance point of the lattice column, marking by scribing, and determining the detection point of the stress meter;
step three: welding and fixing the sensor base according to the position of the balance point;
Step four: installing a sensor;
Step five: connecting a stress tester with the sensor for calibration and testing;
Step six: the stress tester is connected with the sensor through the data optical cable, the sensor is installed to obtain the strain value of each position supported along the lattice column, the strain value is monitored and data analysis is carried out, the influence of the load around the foundation pit in the monitored area on the supporting pile and the lattice column is judged according to the change of internal force, and the safety of the foundation pit is ensured.
The method for monitoring the internal force of the inclined support of the foundation pit lattice column is characterized by comprising the following steps of: the sensor is a stress meter.
The method for monitoring the internal force of the inclined support of the foundation pit lattice column is characterized by comprising the following steps of: before monitoring, preparing for work; including in particular material preparation, tool preparation and monitoring equipment preparation.
The method for monitoring the internal force of the inclined support of the foundation pit lattice column is characterized by comprising the following steps of: the preparation of the material comprises the following steps: preparing an optical cable fixing support material according to the supporting structure, wherein the material is steel pipes or angle steel.
The method for monitoring the internal force of the inclined support of the foundation pit lattice column is characterized by comprising the following steps of: the tool preparation includes: welding machine and gas cutting.
The method for monitoring the internal force of the inclined support of the foundation pit lattice column is characterized by comprising the following steps of: the monitoring device preparation includes: data optical cable, sensor base and stress tester.
The beneficial effects of the application are as follows: according to the technical scheme, the method for monitoring the internal force of the inclined support of the foundation pit lattice column is provided, the strain values of all positions supported along the lattice column are obtained through the installed sensors, monitoring is carried out, data analysis is carried out, the influence of the load around the foundation pit in the monitoring area on the support pile and the lattice column is judged according to the change of the internal force, and the safety of the foundation pit is ensured.
According to the invention, through the peripheral load of the foundation pit and the internal force states of the pile body and the lattice columns, the stress condition of the foundation pit is analyzed, the possible foundation pit problem is mastered in advance, measures are taken in time to reduce the potential safety hazard of the foundation pit, and the supporting safety of the foundation pit is ensured.
Drawings
The invention is described in further detail below with reference to the attached drawings and embodiments:
FIG. 1 is a schematic diagram of the structure of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the application, are intended to be within the scope of the claimed application based on embodiments of the present application.
As shown in fig. 1: the method for monitoring the internal force of the inclined support of the foundation pit lattice column specifically comprises the following steps:
Preparation:
Material preparation: preparing an optical cable fixing support material according to a supporting structure, wherein the material is 48 x 3mm steel pipes or angle steel with the angle of 50 x 5;
preparing a tool: the tool adopts a conventional welding machine, gas cutting and the like;
The monitoring device prepares: data optical cable, sensor (stress meter), sensor base and stress tester;
The monitoring method comprises the following steps:
Step one: determining the number of monitoring points according to the supporting structure design drawing; step two: measuring the distance from the crown beam to the inclined support basic bearing platform and the size of the lattice column, calculating the balance point of the lattice column, marking by scribing, and determining the detection point of the stress meter; step three: welding and fixing the sensor base according to the position of the balance point; step four: installing a sensor; step five: connecting a stress tester with the sensor for calibration and testing; step six: the stress tester is connected with the sensor through the data optical cable, the sensor is installed to obtain the strain value of each position supported along the lattice column, the strain value is monitored and data analysis is carried out, the influence of the load around the foundation pit in the monitored area on the supporting pile and the lattice column is judged according to the change of internal force, and the safety of the foundation pit is ensured.
According to the invention, by monitoring the internal force of the steel lattice support, when the internal force changes in the monitoring process, the side slope condition, the stacking environment and the like of a foundation pit monitoring area can be analyzed in time, and unloading or reinforcing measures are adopted, so that early warning can be performed after deformation occurs compared with the conventional method, and the early warning can be performed in advance, the safety risk is reduced, and the possible accident handling cost is reduced.
While the present application has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that the foregoing embodiments may be modified or equivalents may be substituted for some of the features thereof, and any modification, equivalent substitution, improvement, etc. within the spirit and principles of the present application should be included in the scope of the present application.

Claims (6)

1.一种基坑格构柱斜支撑内力监测的方法，其特征在于它包括如下步骤：1. A method for monitoring the internal force of the inclined support of a foundation pit lattice column, characterized in that it comprises the following steps: 步骤一：根据支护结构设计图纸，确定监测点数量；Step 1: Determine the number of monitoring points according to the support structure design drawings; 步骤二：测量冠梁（2）至斜支撑基础承台（3）的距离及格构柱（1）尺寸，计算格构柱平衡点（8），划线做标记，确定应力计的检测点；Step 2: Measure the distance from the crown beam (2) to the oblique support foundation pedestal (3) and the size of the lattice column (1), calculate the lattice column balance point (8), draw a line to mark it, and determine the detection point of the stress gauge; 步骤三：根据平衡点位置，焊接固定传感器底座（4）；Step 3: Weld and fix the sensor base (4) according to the balance point position; 步骤四：安装传感器（5）；Step 4: Install the sensor (5); 步骤五：连接应力测试仪与传感器标定、测试；Step 5: Connect the stress tester and sensor for calibration and testing; 步骤六：将应力测试仪（7）通过数据光缆（6）与传感器相连，通过安装的传感器获取沿格构柱支撑各个位置的应变值，进行监测并进行数据分析，根据内力的变化判别监测区域基坑周边荷载（10）对支护桩（9）及格构柱（1）的影响，确保基坑安全。Step 6: Connect the stress tester (7) to the sensor via the data optical cable (6), obtain the strain value at each position along the lattice column support through the installed sensor, monitor and perform data analysis, and determine the impact of the surrounding load (10) of the monitoring area foundation pit on the support piles (9) and the lattice column (1) based on the change of internal force to ensure the safety of the foundation pit. 2.根据权利要求1所述的一种基坑格构柱斜支撑内力监测的方法，其特征在于：所述传感器为应力计。2. A method for monitoring the internal force of the inclined support of a foundation pit lattice column according to claim 1, characterized in that the sensor is a stress gauge. 3.根据权利要求1所述的一种基坑格构柱斜支撑内力监测的方法，其特征在于：在监测前，做好准备工作；具体包括材料准备、工具准备和监测设备准备。3. A method for monitoring the internal force of the inclined support of a foundation pit lattice column according to claim 1, characterized in that: before monitoring, preparatory work is done; specifically including material preparation, tool preparation and monitoring equipment preparation. 4.根据权利要求3所述的一种基坑格构柱斜支撑内力监测的方法，其特征在于：材料准备包括：按照支护结构准备光缆固定支架材料，材料为钢管或角钢。4. A method for monitoring the internal force of the inclined support of the foundation pit lattice column according to claim 3, characterized in that: material preparation includes: preparing the optical cable fixing bracket material according to the supporting structure, the material is a steel pipe or an angle steel. 5.根据权利要求3所述的一种基坑格构柱斜支撑内力监测的方法，其特征在于：工具准备包括：焊机和气割。5. A method for monitoring internal forces of inclined supports of lattice columns of foundation pits according to claim 3, characterized in that tool preparation includes: welding machine and gas cutting. 6.根据权利要求3所述的一种基坑格构柱斜支撑内力监测的方法，其特征在于：监测设备准备包括：数据光缆、传感器、传感器底座和应力测试仪。6. A method for monitoring the internal force of the inclined support of a foundation pit lattice column according to claim 3, characterized in that the monitoring equipment comprises: a data optical cable, a sensor, a sensor base and a stress tester.
CN202411022901.0A 2024-07-29 2024-07-29 A method for monitoring internal forces of inclined supports of lattice columns in foundation pits Pending CN118855006A (en)

Priority Applications (1)

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CN202411022901.0A CN118855006A (en) 2024-07-29 2024-07-29 A method for monitoring internal forces of inclined supports of lattice columns in foundation pits

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CN202411022901.0A CN118855006A (en) 2024-07-29 2024-07-29 A method for monitoring internal forces of inclined supports of lattice columns in foundation pits

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117513351A (en) * 2023-10-30 2024-02-06 中国电建集团江西省电力建设有限公司 Recoverable deep foundation pit inclined throwing support system
CN220580007U (en) * 2023-08-03 2024-03-12 中国建筑第八工程局有限公司 Inclined strut supporting structure of steel lattice column of subway deep foundation pit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN220580007U (en) * 2023-08-03 2024-03-12 中国建筑第八工程局有限公司 Inclined strut supporting structure of steel lattice column of subway deep foundation pit
CN117513351A (en) * 2023-10-30 2024-02-06 中国电建集团江西省电力建设有限公司 Recoverable deep foundation pit inclined throwing support system

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Application publication date: 20241029