CN112252380A - Novel automatic monitoring device and monitoring method for steel support axial force - Google Patents
Novel automatic monitoring device and monitoring method for steel support axial force Download PDFInfo
- Publication number
- CN112252380A CN112252380A CN202011336012.3A CN202011336012A CN112252380A CN 112252380 A CN112252380 A CN 112252380A CN 202011336012 A CN202011336012 A CN 202011336012A CN 112252380 A CN112252380 A CN 112252380A
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- Prior art keywords
- steel support
- steel
- axial force
- monitoring
- intelligent
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- 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
Abstract
The invention provides novel steel support axial force automatic monitoring equipment and a monitoring method, wherein a middle pressed gap space formed by a traditional steel support flexible joint and a barrel body structure when the traditional steel support flexible joint extends out is utilized, a special intelligent steel wedge is placed in the middle pressed gap space of the steel support flexible joint, and other gaps are tightly wedged by filling a plurality of traditional steel wedges. Under the stress working condition of the steel support, the intelligent steel wedge sensor can accurately measure the real-time axial force of the steel support, and transmits data to a remote monitoring early warning system and a mobile phone monitoring end in real time through a self-contained data acquisition and transmission module and a field intelligent gateway, so that the purpose of automatically monitoring the axial force of the steel support is achieved. The invention has the advantages of convenient construction, accurate measurement, no instability of the steel support, and realization of real-time automatic monitoring and early warning of the axial force of the steel support.
Description
The technical field is as follows:
the invention relates to steel support axial force monitoring in the field of constructional engineering, in particular to novel automatic steel support axial force monitoring equipment and a monitoring method.
Background art:
underground construction engineering's foundation ditch construction all need adopt the steel shotcrete to avoid the pitted wall to collapse when the excavation foundation ditch, and current steel shotcrete end joint mostly generally is the form of loose head with the steel wedge, uses dedicated jack to steel shotcrete axial force earlier during the use, then stretches out at loose head and the middle pressurized clearance space that forms between the steel shotcrete ladle body and inserts the mode of steel wedge and keep supporting pressure to prevent to support loose head and retract. The steel support of the structure is simple and convenient to construct and widely applied to foundation pit excavation supporting. The steel support is used as an important enclosure support component in excavation construction of foundation pit engineering, and the stress condition of the steel support is related to the safety of the whole foundation pit engineering construction. The steel support is stressed too much, so that the steel support can deform and collapse stably under pressure, and the supported wall body deforms too much and cracks, leaks water and even collapses under the condition of too little stress of the steel support. Therefore, timely monitoring of the condition of the steel support compressive axial force is essential work in the construction process of foundation pit engineering.
However, at present, two main means for monitoring the axial force of the steel support in the foundation pit engineering are available, one means is to install an axial force sensor at the end part of the steel support loose head, and the axial force sensor directly abuts against the wall of the enclosure structure on the side edge of the foundation pit. The other common method is to measure the supporting axial force by mounting a surface stress sensor on the steel support barrel body, and the method has the advantages that the support instability cannot be caused, but the measured steel support axial force is often far away from the actual axial force because most of the barrel bodies are in an uneven pressure state in the actual steel support engineering, and the actual effective stress of the steel support cannot be accurately measured.
Therefore, aiming at the problems in the field of monitoring of the axial force of the steel support of the foundation pit engineering, the invention provides novel automatic monitoring equipment and monitoring method for the axial force of the steel support, which not only can not cause instability of the steel support, but also can realize real-time automatic monitoring of the axial force of the steel support.
The invention content is as follows:
the technical scheme of the invention is as follows:
a novel steel support axial force automatic monitoring device and a monitoring method mainly comprise an intelligent steel wedge (4), an on-site intelligent gateway (9), a remote monitoring and early warning system (91) and a mobile phone monitoring end (92).
The invention utilizes the middle compression gap space formed by the traditional steel support movable joint (1) and the barrel body structure (12) when extending out, the special intelligent steel wedge (4) is placed in the middle compression gap space of the steel support movable joint, and the rest gaps are tightly wedged by a plurality of traditional steel wedges (3). Under the working condition of steel support stress, the pressure of the side wall (6) of the foundation pit is transmitted to a pushing plate (21) of the end pushing structure (2); the pushing plate (21) transmits the pressure to the traditional steel wedge (3), and then the pressure is transmitted to act on the intelligent steel wedge (4); the intelligent steel wedge (4) transmits the pressure at the front end to a barrel body bearing plate (14) inside the steel support loose joint head (1), and finally transmits the pressure to a steel support pipe joint (5) at the rear. The stress path is clear, so that the intelligent steel wedge sensor can accurately measure the real-time axial force of the steel support, the data is transmitted in real time through the data acquisition and transmission module and the field intelligent gateway (9), the field intelligent gateway (9) synchronizes the monitoring data to the remote monitoring and early warning system (91) and the mobile phone monitoring end (92), and the purpose of automatically monitoring the axial force of the steel support is further achieved. The system has the advantages of convenience in installation, safety, reliability, real-time performance and accuracy.
Description of the drawings:
FIG. 1 is a schematic view of the installation of a novel steel support axial force automatic monitoring device.
FIG. 2 is a schematic diagram of a novel steel support axial force automatic monitoring device and a monitoring method.
The specific implementation mode is as follows:
the present invention will now be described in further detail with reference to the accompanying drawings and examples.
1. According to the requirement of supporting and measuring the length, steel supports are spliced on the ground, and a plurality of sections of steel support pipe sections 5 are firmly connected through steel support connecting bolts 51;
2. connecting the steel support swivel head 1 with the spliced steel support pipe joint 5 through a rear end flange plate 13 of the steel support swivel head through a steel support connecting bolt 51;
3. the whole steel support is hoisted and placed on a bracket positioned at the corresponding support position of the foundation pit;
4. pre-applying axial force to the steel support by using an external pre-stress jack;
5. when the axial force of the steel support reaches a set value, firstly inserting the intelligent steel wedge 4 into a middle compression gap space formed between the end bearing plate 23 and the steel drum bearing plate 14, and turning on a power switch of the intelligent steel wedge 4;
6. the rest gaps are wedged tightly by a plurality of traditional steel wedges 3;
7. removing the pre-stress jack;
8. the installed steel support intelligent steel wedge 4 is connected through an on-site intelligent gateway 9; and synchronizing the monitoring data to a remote monitoring and early warning system 91 and a mobile phone monitoring terminal 92 through the on-site intelligent gateway 9.
Claims (2)
1. A novel automatic monitoring device and a monitoring method for steel support axial force are characterized in that: the middle compression gap space formed by extending the traditional steel support moving head is utilized, the special intelligent steel wedge sensor is placed in the middle compression gap space of the steel support moving head, the rest gaps are tightly wedged by the traditional steel wedges, and under the stress working condition of the steel support, the intelligent steel wedge sensor can accurately measure the real-time axial force of the steel support, so that the purpose of automatically monitoring the axial force of the steel support is achieved.
2. The intelligent steel wedge sensor of claim 1, wherein: the intelligent steel wedge sensor is a special integrated intelligent sensor, is provided with a battery and a data acquisition and transmission module, and has the characteristics of real-time pressure monitoring and data acquisition and transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011336012.3A CN112252380A (en) | 2020-11-25 | 2020-11-25 | Novel automatic monitoring device and monitoring method for steel support axial force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011336012.3A CN112252380A (en) | 2020-11-25 | 2020-11-25 | Novel automatic monitoring device and monitoring method for steel support axial force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112252380A true CN112252380A (en) | 2021-01-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011336012.3A Pending CN112252380A (en) | 2020-11-25 | 2020-11-25 | Novel automatic monitoring device and monitoring method for steel support axial force |
Country Status (1)
| Country | Link |
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| CN (1) | CN112252380A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960667A (en) * | 2022-05-18 | 2022-08-30 | 河海大学 | Steel pipe support erection construction process |
-
2020
- 2020-11-25 CN CN202011336012.3A patent/CN112252380A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960667A (en) * | 2022-05-18 | 2022-08-30 | 河海大学 | Steel pipe support erection construction process |
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