CN115387349A - Foundation pit supporting shaft force servo system - Google Patents
Foundation pit supporting shaft force servo system Download PDFInfo
- Publication number
- CN115387349A CN115387349A CN202210960773.9A CN202210960773A CN115387349A CN 115387349 A CN115387349 A CN 115387349A CN 202210960773 A CN202210960773 A CN 202210960773A CN 115387349 A CN115387349 A CN 115387349A
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- CN
- China
- Prior art keywords
- axial force
- foundation pit
- support
- reinforced concrete
- servo system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 238000009415 formwork Methods 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 238000011065 in-situ storage Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
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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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a foundation pit support axial force servo system, which comprises an axial force servo device, a high-voltage bipolar plate capacitor and a high-voltage bipolar plate capacitor, wherein the axial force servo device is used for supporting a foundation pit and comprises at least one group of high-voltage bipolar plate capacitors; and the pair of transformers are respectively connected into corresponding capacitor plates in the axial force server through high-voltage cables. The system comprises a main controller which is electrically connected with the transformer pair. The system comprises at least one axial force sensor which is electrically connected with the main controller and used for detecting the axial force value of the reinforced concrete support.
Description
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to a foundation pit supporting axial force servo system.
Background
In the field of constructional engineering, a steel support servo system can reduce soil deformation caused by foundation pit excavation unloading through active control on support axial force, solves the problem that the traditional steel support cannot monitor the axial force and compensate axial force loss in time, and is rapidly popularized and applied in deep foundation pit engineering such as adjacent subways with high environmental protection level in recent years.
Disclosure of Invention
In one embodiment of the invention, the foundation pit support axial force servo system comprises an axial force servo device, a high-voltage bipolar plate capacitor and a high-voltage bipolar plate capacitor, wherein the axial force servo device is used for supporting a foundation pit and comprises at least one group of high-voltage bipolar plate capacitors;
the pair of transformers are respectively connected into corresponding capacitor plates in the axial force server through high-voltage cables;
and the main controller is electrically connected with the transformer pair.
And the axial force sensor is electrically connected with the main controller and is used for detecting the axial force value of the reinforced concrete support.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
fig. 1 is a schematic view of a foundation pit support axial force servo system according to one embodiment of the invention.
Fig. 2 is a schematic view of an axial force servo system for a foundation pit support according to one embodiment of the invention.
1-transformer box (built-in high-voltage transformer)
2-high voltage cable
3-capacitor plate
4-axial force sensor
5-axial force servo
6-reinforced concrete support
7-first Transmission line
8-second Transmission line
9-Main controller
Detailed Description
In foundation pit engineering, the existing axial force support servo system is already well applied to a steel support system, but the applicability of the existing cast-in-place concrete support jack type servo system is not strong.
In accordance with one or more embodiments, as shown in fig. 1 and 2, an excavation support axial force servo system, comprising: the axial force servo is integrally cast in place with the reinforced concrete support, is used for supporting a foundation pit and comprises at least one group of high-pressure bipolar plate capacitors; the pair of transformers are respectively connected into corresponding capacitor plates in the axial force server through high-voltage cables; the main controller is electrically connected with the transformer pair; at least one axial force sensor electrically connected to the main controller and disposed within the reinforced concrete support. The method is used for detecting the axial force value of the reinforced concrete support.
According to one or more embodiments, a foundation pit supporting axial force servo system based on an electromagnetic principle is used for solving the problem that an existing jack type servo system for supporting cast-in-place concrete is not strong in applicability. The construction and installation process of the foundation pit supporting axial force servo system comprises the following steps:
the first step is as follows: installing the foundation pit support axial force servo when the reinforced concrete support formwork is supported;
the second step is that: after the reinforced concrete support formwork is finished, the foundation pit support axial force servo and the reinforced concrete support are integrally cast in place, and an axial force sensor is arranged in a servo system and can read the reinforced concrete axial force;
the third step: in the process of excavation of the foundation pit, automatically adjusting or manually adjusting the voltage of a high-voltage transformer of a servo system according to the axial force of an axial force sensor and the monitoring data of the foundation pit, so as to adjust the repulsive force of a capacitor on a servo, further adjust the axial force of a support and control the displacement of the foundation pit;
the fourth step: and (4) finishing pouring of the foundation pit bottom plate, and after the support replacement is finished, synchronously removing the servo system and the reinforced concrete support.
A server in the adopted foundation pit supporting axial force servo system adopts capacitance repulsion as axial force support, and the capacitance repulsion can provide a support adjustment range of about 1000-2000 kN.
In the foundation pit supporting axial force servo system based on the electromagnetic principle, the adjustable voltage range of a transformer box is 10 kV-50 kV, the transformer is connected with a capacitor plate of a servo through a high-voltage cable, and the whole foundation pit supporting axial force servo system is buried in a reinforced concrete support. The axial force sensor transmits axial force data to the servo system processing center main controller through the transmission line, and the main controller controls the transformer of the transformer box to adjust the voltage range through the transmission line according to the axial force condition, so that the reinforced concrete axial force is adjusted.
The steps in the construction operation include:
installing the foundation pit support axial force servo system when the reinforced concrete support formwork is supported, and carrying out necessary debugging before installation, wherein the voltage debugging range meets the requirement;
after the reinforced concrete support formwork is finished, the foundation pit support axial force servo system and the reinforced concrete support are integrally cast in place, the axial force sensor is arranged, the axial force sensor can read the reinforced concrete axial force, the installation of the axial force sensor is checked to be correct, and the working state of the servo system is detected.
In the excavation process of the foundation pit, the supporting axial force changes, the system accurately adjusts the voltage of the servo system according to the axial force transmitted by the axial force sensor, and the supporting axial force is adjusted;
and (4) finishing pouring of the foundation pit bottom plate, and after the support replacement is finished, synchronously removing the servo system and the reinforced concrete support.
It should be noted that while the foregoing has described the spirit and principles of the invention with reference to several specific embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in these aspects cannot be combined. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (7)
1. A foundation pit support axial force servo system is characterized by comprising an axial force servo device, a high-voltage bipolar plate capacitor and a high-voltage bipolar plate capacitor, wherein the axial force servo device is used for foundation pit support and comprises at least one group of high-voltage bipolar plate capacitors;
and the pair of transformers are respectively connected into corresponding capacitor plates in the axial force server through high-voltage cables.
2. The foundation pit support axial force servo system of claim 1, wherein the system comprises a main controller electrically connected to the pair of transformers.
3. The foundation pit support axial force servo system of claim 2, wherein the system comprises at least one axial force sensor electrically connected with the main controller for detecting the axial force value of the reinforced concrete support.
4. The foundation pit support axial force servo system of claim 3, wherein the axial force sensor is disposed within the reinforced concrete support.
5. The foundation pit support axial force servo system of claim 1, wherein the axial force servo is cast in place integrally with the reinforced concrete support.
6. The foundation pit support axial force servo system as claimed in claim 1, wherein the construction method of the system comprises the following steps:
installing an axial force server for supporting a foundation pit when the reinforced concrete supports and supports the formwork;
after the reinforced concrete support formwork is finished, integrally casting the axial force servo and the reinforced concrete support in situ, and arranging an axial force sensor which reads the axial force value of the reinforced concrete support;
in the process of excavation of the foundation pit, the output voltage of the transformer is adjusted according to the axial force of the axial force sensor and the monitoring data of the foundation pit, so that the repulsive force of the capacitance of the bipolar plate of the axial force servo is adjusted, the axial force of the reinforced concrete support is adjusted, and the displacement of the foundation pit is controlled.
7. The foundation pit support axial force servo system of claim 6, wherein the construction method of the system further comprises,
and when the foundation pit bottom plate is poured and the support is changed, the axial force server and the reinforced concrete support are removed synchronously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210960773.9A CN115387349A (en) | 2022-08-11 | 2022-08-11 | Foundation pit supporting shaft force servo system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210960773.9A CN115387349A (en) | 2022-08-11 | 2022-08-11 | Foundation pit supporting shaft force servo system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115387349A true CN115387349A (en) | 2022-11-25 |
Family
ID=84118957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210960773.9A Pending CN115387349A (en) | 2022-08-11 | 2022-08-11 | Foundation pit supporting shaft force servo system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115387349A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002221463A (en) * | 2001-12-26 | 2002-08-09 | Kazuhiro Okada | Device for detecting physical quantity by utilizing change in inter-electrode distance, and method for testing its operation |
| JP2008076106A (en) * | 2006-09-19 | 2008-04-03 | Alps Electric Co Ltd | Servo-type pressure sensor |
| CN103065796A (en) * | 2012-12-31 | 2013-04-24 | 国家电网公司 | Variable-pitch type power capacitor and adjusting method for capacitance value of variable-pitch type power capacitor |
| CN104201059A (en) * | 2014-09-03 | 2014-12-10 | 太原理工大学 | Radio-frequency MEMS switch based on electrostatic repulsion and attraction hybrid driving |
| CN105033374A (en) * | 2015-08-17 | 2015-11-11 | 江苏大学 | Magnetic feeding type electrolysis electric spark combined machining method and device |
| CN212899239U (en) * | 2020-08-07 | 2021-04-06 | 上海同磊土木工程技术有限公司 | Steel support axial force servo system |
| CN215948203U (en) * | 2021-08-12 | 2022-03-04 | 陶静玉 | Partition structure for controlling deformation of deep and large foundation pit |
| CN114134900A (en) * | 2021-12-06 | 2022-03-04 | 上海建工一建集团有限公司 | Concrete support servo system and construction monitoring and control method thereof |
-
2022
- 2022-08-11 CN CN202210960773.9A patent/CN115387349A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002221463A (en) * | 2001-12-26 | 2002-08-09 | Kazuhiro Okada | Device for detecting physical quantity by utilizing change in inter-electrode distance, and method for testing its operation |
| JP2008076106A (en) * | 2006-09-19 | 2008-04-03 | Alps Electric Co Ltd | Servo-type pressure sensor |
| CN103065796A (en) * | 2012-12-31 | 2013-04-24 | 国家电网公司 | Variable-pitch type power capacitor and adjusting method for capacitance value of variable-pitch type power capacitor |
| CN104201059A (en) * | 2014-09-03 | 2014-12-10 | 太原理工大学 | Radio-frequency MEMS switch based on electrostatic repulsion and attraction hybrid driving |
| CN105033374A (en) * | 2015-08-17 | 2015-11-11 | 江苏大学 | Magnetic feeding type electrolysis electric spark combined machining method and device |
| CN212899239U (en) * | 2020-08-07 | 2021-04-06 | 上海同磊土木工程技术有限公司 | Steel support axial force servo system |
| CN215948203U (en) * | 2021-08-12 | 2022-03-04 | 陶静玉 | Partition structure for controlling deformation of deep and large foundation pit |
| CN114134900A (en) * | 2021-12-06 | 2022-03-04 | 上海建工一建集团有限公司 | Concrete support servo system and construction monitoring and control method thereof |
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