CN116858063A - Device and method for monitoring pile top displacement of steel sheet pile cofferdam - Google Patents
Device and method for monitoring pile top displacement of steel sheet pile cofferdam Download PDFInfo
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- CN116858063A CN116858063A CN202310812456.7A CN202310812456A CN116858063A CN 116858063 A CN116858063 A CN 116858063A CN 202310812456 A CN202310812456 A CN 202310812456A CN 116858063 A CN116858063 A CN 116858063A
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- sheet pile
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- pile
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 69
- 239000010959 steel Substances 0.000 title claims abstract description 69
- 238000012544 monitoring process Methods 0.000 title claims abstract description 62
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000010276 construction Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims description 5
- 230000001960 triggered effect Effects 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000013507 mapping Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to the technical field of bridge substructure construction, and particularly relates to a device and a method for monitoring displacement of a pile top of a steel sheet pile cofferdam. The device includes displacement measurement module and monitoring early warning module, displacement measurement module includes the scale, the inside spout that is equipped with of scale, spout both sides lateral wall is equipped with the resistance card respectively, monitoring early warning module slidable mounting is in the spout, monitoring early warning module includes the card mark, the card mark contacts with the resistance card, be equipped with resistance change response subassembly in the card mark, monitoring early warning module left side is connected with the telescopic link, telescopic link tip is equipped with the backing plate, the backing plate is fixed with the steel sheet pile, the steel sheet pile produces after the displacement change, the telescopic link drives card mark and resistance card relative movement friction and produces the resistance value, resistance change response subassembly detects corresponding resistance value and carries out the early warning. The invention has simple structure and convenient operation, can monitor the displacement of the pile top of the steel sheet pile in real time, and solves the problem that the existing surveying and mapping means can not monitor the displacement of the pile top of the steel sheet pile in real time.
Description
Technical Field
The invention belongs to the technical field of bridge substructure construction, and particularly relates to a device and a method for monitoring displacement of a pile top of a steel sheet pile cofferdam.
Background
Sheet piles are steel structures with linkages at the edges and the linkages can be freely combined to form a continuous tight retaining or retaining wall. The novel environment-friendly building steel is widely applied to projects such as wharfs, embankment protection banks, retaining walls, docks, bridge cofferdams and the like.
In coastal city bridge construction, a pile cap is generally constructed by constructing a steel sheet pile cofferdam. Under the action of water flow and lateral soil pressure, the pile top of the steel sheet pile is displaced, and in order to ensure the construction safety of the bearing platform and the bridge pier, the displacement of the pile top of the steel sheet pile is ensured to be in a controllable range, which is the important point and the difficult point of construction. At present, in the engineering practice process, pile top displacement monitoring is mainly carried out by adopting a small-angle method, a sight line method, a polar coordinate method, a free standing method based on a front intersection method and the like. The small-angle method and the sight line method are simple and feasible, and are convenient for field operation; but the precision is lower, the required field is wide, and the method is only suitable for foundation pits with regular shapes. The polar coordinate method has flexible base point layout, less workload, simplicity, time saving and high efficiency; however, the working foundation point is closer to the foundation pit, so that the displacement change of the foundation point is larger, the error is large, and the requirement on monitoring precision cannot be met. The free station setting method has flexible station setting, high operation efficiency and no restriction of the visibility, avoids the influence of unstable working base points on the monitoring precision, but requires the selection of total stations with measuring angles matched with the ranging precision, ensures that the base line edge is as short as possible on the premise that the intersection angle is close to 90-100 degrees, and meanwhile, the precision of the station setting is not high, and can improve the precision and the reliability of the monitoring data only on the premise that the reference points are forcedly centered. In a word, the monitoring and real-time monitoring of the pile top displacement and the timely early warning are difficult to achieve through the existing surveying and mapping means.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a device and a monitoring method for monitoring the displacement of the pile top of a steel sheet pile cofferdam, the device is simple in structure and easy to operate, and the problems of real-time monitoring and timely early warning of the displacement of the pile top of the current steel sheet pile can be effectively solved by detecting the resistance value generated by the relative movement friction of a clamping mark and a resistance sheet driven by a telescopic rod to perform early warning.
The technical scheme of the invention is as follows: the utility model provides a device for monitoring displacement of steel sheet pile cofferdam pile bolck, includes displacement measurement module and monitoring early warning module, displacement measurement module includes the scale, the inside spout that is equipped with of scale, spout both sides lateral wall is equipped with the resistance card respectively, monitoring early warning module slidable mounting is in the spout, monitoring early warning module includes the card mark, the card mark with the resistance card contacts, be equipped with resistance change response subassembly in the card mark, monitoring early warning module left side is connected with the telescopic link, the telescopic link tip is equipped with the backing plate, backing plate and steel sheet pile fixed connection, the scale right side is equipped with the fixed plate, fixed plate fixed connection is in cofferdam bottom back cover concrete, the steel sheet pile produces displacement change back, the telescopic link drives card mark and resistance card relative movement friction and produces the resistance value, resistance change response subassembly detects corresponding resistance value and carries out the early warning.
The resistance change sensing assembly comprises a power supply, a resistance converter, a controller, a loudspeaker and a warning lamp which are sequentially connected, the resistance converter converts a resistance value generated by relative movement friction of the card mark and the resistance sheet into an electric signal and transmits the electric signal to the controller, the controller compares the received electric signal with an input threshold value of the electric signal, and when the received electric signal exceeds the threshold value, the loudspeaker and the warning lamp are triggered to give an alarm.
The telescopic link tip is the T type, and T type tip is equipped with a plurality of bolt holes, the backing plate surface is equipped with the recess, the recess size with telescopic link T type tip assorted, be equipped with the bolt in the bolt hole, backing plate and steel sheet pile welded connection.
The scale is horizontally arranged, and scales are arranged on two sides of the sliding groove in the scale.
The scale lower surface is equipped with the bracket, bracket one end with the scale is close to steel sheet pile one side fixed connection, one end with fixed plate fixed connection.
The range of the graduated scale is + -5 cm, the precision is 1mm, and a zero line of the graduated scale is positioned at the middle part.
The clamping marks, the backing plates and the fixing plates are made of aluminum alloy materials with rectangular cross sections.
A monitoring method for monitoring displacement of a pile top of a steel sheet pile cofferdam, using an apparatus for monitoring displacement of a pile top of a steel sheet pile cofferdam as described above, comprising the steps of:
s1: lifting cofferdam construction, lifting an enclosing purlin around the steel sheet pile, installing a transverse support and an inclined strut, and polishing and cleaning the top surface of the steel sheet pile so as to ensure smoothness and neatness;
s2: before pouring the bottom sealing concrete at the bottom of the cofferdam, vertically hanging a fixed plate to the bottom, and finishing hanging after the concrete is hardened;
s3: welding a backing plate on the pile top of the polished steel sheet pile, fixing a displacement measurement module with the backing plate, and adhering two ends of a bracket to the lower part of the displacement measurement module to keep a graduated scale horizontal;
s4: after the installation is finished, the clamp marks are aligned to zero lines of the graduated scale, zero setting treatment is carried out on the graduated scale through a controller of the monitoring and early warning module, then a controller threshold value is set, monitoring can be started, and the threshold value is determined according to relevant specifications and the size of the cofferdam plane.
The invention has the technical effects that: 1. the invention has simple structure and easy operation, and the resistance value is generated by detecting the relative movement friction of the telescopic rod driving the clamping mark and the resistance sheet to perform early warning, so that the problems of real-time monitoring and timely early warning of the current steel sheet pile top displacement can be effectively solved; 2. the method carries out early warning by directly detecting the displacement change of the pile top of the steel sheet pile, and compared with the existing coordinate measuring and calculating method, the method does not need manual participation, and is quick and accurate; 3. according to the invention, the resistor converter is used for converting the resistance value generated by relative movement friction between the clamping mark and the resistor sheet into the electric signal, the electric signal is transmitted to the controller, the controller compares the received electric signal with the input threshold value of the electric signal, and when the received electric signal exceeds the threshold value, the loudspeaker and the warning lamp are triggered to give an alarm, so that the real-time monitoring and the timely early warning of the displacement of the pile top of the steel sheet pile are realized.
Further description will be made below with reference to the accompanying drawings.
Drawings
Fig. 1 is a structural plan view of an apparatus for monitoring displacement of a pile top of a steel sheet pile cofferdam in accordance with an embodiment of the present invention.
Fig. 2 is a front view showing the construction of an apparatus for monitoring displacement of the pile top of a steel sheet pile cofferdam in accordance with an embodiment of the present invention.
Fig. 3 is a schematic diagram of a monitoring module according to an embodiment of the invention.
Fig. 4 is a schematic diagram of an installation and use of a device for monitoring displacement of a pile top of a steel sheet pile cofferdam according to an embodiment of the present invention.
Reference numerals: the device comprises a 1-displacement measuring module, a 2-steel sheet pile, a 3-enclosing purlin, a 4-transverse support, a 5-diagonal brace, an 11-graduated scale, a 12-telescopic rod, a 13-clamping mark, a 14-backing plate, a 15-monitoring and early warning module, a 16-bolt, a 17-fixing plate, an 18 bracket, a 19-resistor disc, a 151 power supply, a 152-resistor converter, a 153-controller, a 154-loudspeaker and a 155-warning lamp.
Description of the embodiments
Embodiment 1 is as shown in fig. 1, fig. 2, a device for monitoring displacement of steel sheet pile cofferdam pile top, including displacement measurement module 1 and monitoring early warning module 15, displacement measurement module 1 includes scale 11, the inside spout that is equipped with of scale 11, spout both sides lateral wall is equipped with resistance 19 respectively, monitoring early warning module 15 slidable mounting is in the spout, monitoring early warning module 15 includes card mark 13, card mark 13 with resistance 19 contacts, be equipped with resistance change sensing assembly in the card mark 13, monitoring early warning module 15 left side is connected with telescopic link 12, telescopic link 12 tip is equipped with backing plate 14, backing plate 14 and steel sheet pile 2 fixed connection, the scale 11 right side is equipped with fixed plate 17, fixed plate 17 fixed connection is in cofferdam bottom concrete, after the steel sheet pile 2 produces the displacement change, telescopic link 12 drives card mark 13 and resistance 19 relative movement friction and produces the resistance value, resistance change sensing assembly detects corresponding resistance value and carries out early warning.
In the actual use process, the surface of the pile top of the steel sheet pile 2 is firstly polished and cleaned up when the steel sheet pile is used, so that the steel sheet pile is smooth and tidy; then, before pouring the bottom sealing concrete at the bottom of the cofferdam, vertically hanging the fixed plate 17 to the bottom, and finishing hanging after the concrete is hardened; welding a backing plate 14 on the pile top of the polished steel sheet pile 2, and fixing the displacement measurement module 1 and the backing plate 14 to keep the graduated scale 11 horizontal; after the installation is completed, the clamping marks 13 are aligned with zero lines of the graduated scale 11, zero setting treatment is carried out on the graduated scale 11 through the monitoring and early warning module 15, then the threshold value of the controller 153 is set, the monitoring can be started, and the threshold value is determined according to relevant specifications and the size of the plane of the cofferdam.
Embodiment 2 preferably, on the basis of embodiment 1, as shown in fig. 3, the resistance change sensing assembly includes a power source 151, a resistance converter 152, a controller 153, a speaker 154 and a warning lamp 155, which are sequentially connected, wherein the resistance converter 152 converts a resistance value generated by relative movement friction between the card mark 13 and the resistor 19 into an electrical signal, and transmits the electrical signal to the controller 153, and the controller 153 compares the received electrical signal with an input threshold value thereof, and when the received electrical signal exceeds the threshold value, the speaker 154 and the warning lamp 155 are triggered to alarm.
In the actual use process, the resistor converter 152 converts the resistance value generated by the relative movement friction of the card mark 13 and the resistor 19 into an electric signal, the electric signal is transmitted to the controller 153, the controller 153 compares the received electric signal with the input threshold value, and when the received electric signal exceeds the threshold value, the loudspeaker 154 and the warning lamp 155 are triggered to give an alarm, so that the real-time monitoring and the timely early warning of the displacement of the pile top of the steel sheet pile are realized.
Embodiment 3 preferably, on the basis of embodiment 1 or embodiment 2, in this embodiment, the end of the telescopic rod 12 is T-shaped, a plurality of bolt holes are formed in the T-shaped end, a groove is formed in the surface of the backing plate 14, the size of the groove is matched with that of the T-shaped end of the telescopic rod 12, bolts 16 are arranged in the bolt holes, and the backing plate 14 is welded with the steel sheet pile 2.
In the actual use process, the end part of the telescopic rod 12 is of a T shape, a plurality of bolt holes are formed in the T-shaped end part, grooves are formed in the surface of the backing plate 14, the size of the grooves is matched with that of the T-shaped end part of the telescopic rod 12, bolts 16 are arranged in the bolt holes, the end part of the telescopic rod 12 is fixedly connected with the backing plate 14 by the bolts 16, the telescopic rod is detachable after the telescopic rod is used, the telescopic rod is simple and convenient to use, the backing plate 14 is welded and connected with the steel sheet pile 2, the backing plate 14 and the steel sheet pile 2 are guaranteed to be integrated, and the displacement change of the steel sheet pile 2 is accurately reflected.
Embodiment 4 preferably, in this embodiment, the scale 11 is horizontally disposed, and two sides of the chute inside the scale 11 are provided with scales.
In the actual use process, the graduated scale 11 is horizontally arranged, so that the accurate measurement of the displacement change of the pile top of the steel sheet pile 2 is ensured.
Embodiment 5 preferably, on the basis of embodiment 1 or embodiment 4, in this embodiment, a bracket 18 is provided on the lower surface of the scale 11, one end of the bracket 18 is fixedly connected with one side of the scale 11, which is close to the steel sheet pile 2, and one end is fixedly connected with the fixing plate 17.
In the actual use process, the lower surface of the graduated scale 11 is provided with the bracket 18, one end of the bracket 18 is fixedly connected with one side of the graduated scale 11, which is close to the steel sheet pile 2, and the other end of the bracket is fixedly connected with the fixed plate 17, so that the structural rigidity of the graduated scale 11 is ensured, and meanwhile, the graduated scale 11 is ensured to be kept horizontal in the use process.
Embodiment 6 preferably, on the basis of embodiment 1 or embodiment 5, in this embodiment, the measuring range of the scale 11 is ±5cm, the precision is 1mm, and the zero line of the scale 11 is located at the middle position.
In the actual use process, the zero line of the graduated scale 11 is positioned in the middle position, so that the size of the device is saved, and the displacement change of the pile top of the steel sheet pile 2 is conveniently measured.
Embodiment 7 preferably, in this embodiment, based on embodiment 1 or embodiment 6, the card mark 13, the backing plate 14, and the fixing plate 17 are made of aluminum alloy materials with rectangular cross sections.
In the actual use process, the clamping mark 13, the backing plate 14 and the fixing plate 17 are made of aluminum alloy materials with rectangular cross sections, so that the clamping mark is light in weight, does not rust, and is more suitable for field environment operation.
Embodiment 8 a method for monitoring pile top displacement of a steel sheet pile cofferdam using an apparatus for monitoring pile top displacement of a steel sheet pile cofferdam as described above, comprising the steps of:
s1: as shown in fig. 4, the construction of a cofferdam is hoisted, an enclosing purlin 3 is hoisted at the periphery of a steel sheet pile 2, a transverse support 4 and an inclined strut 5 are arranged, and the pile top surface of the steel sheet pile 2 is polished and cleaned, so that smoothness and neatness are ensured;
s2: before pouring the bottom sealing concrete at the bottom of the cofferdam, vertically hanging a fixed plate 17 to the bottom, and finishing hanging after the concrete is hardened;
s3: welding a backing plate 14 on the pile top of the polished steel sheet pile 2, fixing the displacement measurement module 1 and the backing plate 14, and adhering two ends of a bracket 18 to the lower part of the displacement measurement module 1 to keep the graduated scale 11 horizontal;
s4: after the installation is completed, the clamping marks 13 are aligned with zero lines of the graduated scale 11, the graduated scale 11 is zeroed through the controller 153 of the monitoring and early warning module 15, then the threshold value of the controller 153 is set, the monitoring can be started, and the threshold value is determined according to relevant specifications and the size of the cofferdam plane.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. A device for monitoring steel sheet pile cofferdam pile bolck displacement, its characterized in that: including displacement measurement module (1) and monitoring early warning module (15), displacement measurement module (1) are including scale (11), scale (11) inside is equipped with the spout, spout both sides lateral wall is equipped with resistance card (19) respectively, monitoring early warning module (15) slidable mounting is in the spout, monitoring early warning module (15) are including card mark (13), card mark (13) with resistance card (19) contact, be equipped with resistance change response subassembly in card mark (13), monitoring early warning module (15) left side is connected with telescopic link (12), telescopic link (12) tip is equipped with backing plate (14), backing plate (14) and steel sheet pile (2) fixed connection, scale (11) right side is equipped with fixed plate (17), fixed plate (17) fixed connection is in cofferdam bottom back seal concrete, after steel sheet pile (2) produce the displacement change, telescopic link (12) drive card mark (13) and resistance card (19) relative movement produce resistance change response subassembly, corresponding resistance change and carry out the early warning value.
2. An apparatus for monitoring displacement of a pile top of a steel sheet pile cofferdam as set forth in claim 1, wherein: the resistance change sensing assembly comprises a power supply (151), a resistance converter (152), a controller (153), a loudspeaker (154) and a warning lamp (155) which are sequentially connected, the resistance converter (152) converts resistance values generated by relative movement friction of the card mark (13) and the resistance sheet (19) into electric signals and transmits the electric signals to the controller (153), the controller (153) compares the received electric signals with input thresholds, and when the received electric signals exceed the thresholds, the loudspeaker (154) and the warning lamp (155) are triggered to give an alarm.
3. An apparatus for monitoring displacement of a pile top of a steel sheet pile cofferdam as set forth in claim 1, wherein: the telescopic rod (12) tip is T type, and T type tip is equipped with a plurality of bolt holes, backing plate (14) surface is equipped with the recess, recess size with telescopic rod (12) T type tip phase-match, be equipped with bolt (16) in the bolt hole, backing plate (14) and steel sheet pile (2) welded connection.
4. An apparatus for monitoring displacement of a pile top of a steel sheet pile cofferdam as set forth in claim 1, wherein: the scale (11) is horizontally arranged, and scales are arranged on two sides of a sliding groove in the scale (11).
5. An apparatus for monitoring displacement of a pile top of a steel sheet pile cofferdam as set forth in claim 1, wherein: the lower surface of the graduated scale (11) is provided with a bracket (18), one end of the bracket (18) is fixedly connected with one side, close to the steel sheet pile (2), of the graduated scale (11), and the other end of the bracket is fixedly connected with the fixing plate (17).
6. An apparatus for monitoring displacement of a pile top of a steel sheet pile cofferdam as set forth in claim 1, wherein: the measuring range of the graduated scale (11) is +/-5 cm, the precision is 1mm, and a zero line of the graduated scale (11) is positioned at the middle part.
7. An apparatus for monitoring displacement of a pile top of a steel sheet pile cofferdam as set forth in claim 1, wherein: the clamp mark (13), the backing plate (14) and the fixing plate (17) are made of aluminum alloy materials with rectangular cross sections.
8. A monitoring method for monitoring displacement of pile tops of steel sheet pile cofferdam, using a device for monitoring displacement of pile tops of steel sheet pile cofferdam as claimed in claims 1-7, characterized in that: the method comprises the following steps:
s1: lifting cofferdam construction, namely lifting an enclosing purlin (3) around a steel sheet pile (2), installing a transverse support (4) and an inclined strut (5), and polishing and cleaning the pile top surface of the steel sheet pile (2) to ensure smoothness and neatness;
s2: before pouring the bottom sealing concrete at the bottom of the cofferdam, vertically hanging a fixed plate (17) to the bottom, and finishing hanging after the concrete is hardened;
s3: welding a backing plate (14) on the pile top of the polished steel sheet pile (2), fixing a displacement measurement module (1) and the backing plate (14), and adhering two ends of a bracket (18) to the lower part of the displacement measurement module (1) to keep a graduated scale (11) horizontal;
s4: after the installation is finished, the clamping marks (13) are aligned to zero lines of the graduated scale (11), zero setting treatment is carried out on the graduated scale (11) through a controller (153) of the monitoring and early warning module (15), then a threshold value of the controller (153) is set, monitoring can be started, and the threshold value is determined according to relevant specifications and the size of the plane of the cofferdam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310812456.7A CN116858063A (en) | 2023-07-04 | 2023-07-04 | Device and method for monitoring pile top displacement of steel sheet pile cofferdam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310812456.7A CN116858063A (en) | 2023-07-04 | 2023-07-04 | Device and method for monitoring pile top displacement of steel sheet pile cofferdam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116858063A true CN116858063A (en) | 2023-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310812456.7A Pending CN116858063A (en) | 2023-07-04 | 2023-07-04 | Device and method for monitoring pile top displacement of steel sheet pile cofferdam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116858063A (en) |
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2023
- 2023-07-04 CN CN202310812456.7A patent/CN116858063A/en active Pending
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