CN111088821A - Surface displacement monitoring system and monitoring method for assembled lattice beam - Google Patents
Surface displacement monitoring system and monitoring method for assembled lattice beam Download PDFInfo
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- CN111088821A CN111088821A CN202010006917.8A CN202010006917A CN111088821A CN 111088821 A CN111088821 A CN 111088821A CN 202010006917 A CN202010006917 A CN 202010006917A CN 111088821 A CN111088821 A CN 111088821A
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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
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- 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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Abstract
The invention discloses a surface displacement monitoring system for an assembled lattice beam, and relates to the technical field of slope stability reinforcement and safety monitoring; the slope support mechanism comprises a slope top beam, a cross lattice beam and a slope foot beam, the slope top beam and the slope foot beam respectively comprise a plurality of T-shaped prefabricated lattice beams which are sequentially spliced side by side, the cross lattice beam comprises the cross prefabricated lattice beam, the cross prefabricated lattice beams are mutually spliced to form a net-shaped structure, and the cross lattice beams are laid on the slope and are respectively connected with the slope top beam and the slope foot beam; the safety monitoring mechanism comprises a stay wire type surface displacement sensor and a steel wire rope; the invention has the beneficial effects that: and slope stability reinforcement and safety monitoring are carried out, the integration of slope reinforcement and safety monitoring is realized, and the difficulty and cost of slope safety monitoring in the later period are reduced.
Description
Technical Field
The invention relates to the technical field of slope stability reinforcement and safety monitoring, in particular to a surface displacement monitoring system and a surface displacement monitoring method for an assembled lattice beam.
Background
Along with the rapid development of prefabricated building structures, the prefabricated technology is also applied to slope reinforcement, the construction period is greatly reduced and the building is more elegant and beautiful under the condition of ensuring the quality, but in the construction process and after completion, particularly, the slope surface collapse phenomenon caused by large rainfall in a rainwater-rich area is caused, so that the slope needs to be subjected to surface safety monitoring work.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a surface displacement monitoring system for an assembled lattice beam, which is used for slope stability reinforcement and safety monitoring, realizes the integration of slope reinforcement and safety monitoring, and reduces the difficulty and cost of later slope safety monitoring.
The technical scheme adopted by the invention for solving the technical problems is as follows: in a surface displacement monitoring system for a fabricated lattice beam, the improvement comprising: the device comprises a slope supporting mechanism and a slope safety monitoring mechanism;
the slope supporting mechanism comprises a slope top beam, a cross lattice beam and a slope foot beam, wherein the slope top beam and the slope foot beam respectively comprise a plurality of T-shaped prefabricated lattice beams which are sequentially spliced side by side, the slope top beam is laid at the top of the slope, the slope foot beam is laid at the bottom of the slope, the slope top beam serves as a measured point, and the slope foot beam serves as a fixed point; the cross lattice beam comprises cross prefabricated lattice beams, a plurality of cross prefabricated lattice beams are mutually spliced to form a net structure, and the cross lattice beams are laid and fixed on the side slope and are respectively connected with the top slope beam and the toe slope beam; one T-shaped prefabricated lattice beam in the slope top beam, the corresponding cross-shaped prefabricated lattice beam in the cross-shaped lattice beam and one corresponding T-shaped prefabricated lattice beam in the slope foot beam form a lattice beam unit, and the slope supporting mechanism comprises a plurality of lattice beam units which are sequentially connected in parallel;
the safety monitoring mechanism comprises a stay wire type surface displacement sensor and a steel wire rope, reserved grooves for mounting the stay wire type surface displacement sensor are formed in the T-shaped prefabricated lattice beams, reserved pipelines for enabling the steel wire rope to penetrate through are formed in the T-shaped prefabricated lattice beams and the cross-shaped prefabricated lattice beams, two ends of the steel wire rope are respectively connected to the stay wire type surface displacement sensor and a measured point of the slope top beam which are located in the reserved grooves of the two T-shaped prefabricated lattice beams, the stay wire type surface displacement sensor, the measured point of the slope top beam and the reserved pipelines are aligned, the steel wire rope is in a tension state and keeps tension unchanged, and the steel wire rope is in a suspended state in the reserved pipelines and does not contact with the inner walls of the reserved pipelines.
The safety monitoring mechanism is formed by connecting a stay wire type surface displacement sensor and a measured point of a slope top beam through a steel wire rope, the stay wire type surface displacement sensor is installed and fixed in a reserved groove of a T-shaped prefabricated lattice beam, the steel wire rope is pulled out from a rope outlet of the stay wire type surface displacement sensor and is fixedly connected with the measured point of the slope top beam, when the surface of a side slope slides, the slope top beam and a slope foot beam are relatively displaced, namely the measured point and a fixed point are relatively displaced, the measured point in the lattice beam is driven to move, the steel wire rope connected with the lattice beam is pulled, the steel wire rope drives a sensor transmission mechanism in the stay wire type displacement sensor to synchronously rotate with an encoder, linear displacement is converted into angular displacement of the transmission mechanism, and the relative displacement variation of the measured point is calculated through the angle variation.
In the structure, the three top ends of the T-shaped prefabricated lattice beam are provided with first reinforcing steel bars protruding outwards, and the four top ends of the cross-shaped prefabricated lattice beam are provided with second reinforcing steel bars protruding outwards.
In the structure, a steel bar penetrates through a reserved groove of the T-shaped prefabricated lattice beam, and the stay wire type surface displacement sensor is welded on the steel bar.
In the structure, the bottom of the side slope is provided with a slope toe cushion layer, the slope toe cushion layer is a reinforced concrete cushion layer poured at the bottom of the side slope, and the slope toe beam is laid on the slope toe cushion layer.
In the structure, the cross-shaped prefabricated lattice beam is fixed on the side slope through an anchoring structure, and the anchoring structure comprises an anchor rod, an anchor backing plate, a nut and an anchor hole;
the anchor backing plate is laid in the center of the top surface of the cross-shaped prefabricated lattice beam, the anchor hole is formed in the centers of the anchor backing plate and the cross-shaped prefabricated lattice beam, the anchor rod is inserted into the anchor hole and is fastened inside the side slope through cement mortar, and the anchor rod protrudes out of the top end of the anchor backing plate and is locked through a nut.
In the above structure, a protective cover is fixedly arranged outside the anchor rod and the nut.
In addition, the invention also provides a surface displacement monitoring method for the fabricated lattice beam, which is improved by the following steps:
s1, preparing construction of a slope safety monitoring mechanism, cleaning a slope surface, pouring a reinforced concrete cushion layer at the bottom of a slope to form a slope cushion layer, drilling anchor holes, and implanting anchor rods to pour cement mortar and grouting material;
s2, hoisting the T-shaped prefabricated lattice beam and the cross-shaped prefabricated lattice beam to corresponding positions of the side slope from bottom to top by using a crane, and installing the T-shaped prefabricated lattice beam on the slope toe cushion layer to form the slope toe beam; aligning the anchor holes of the cross prefabricated lattice beams with the anchor rods, and enabling the anchor rods to penetrate through the anchor holes to be hung on the side slopes; hoisting the T-shaped prefabricated lattice beams to the top of the side slope, wherein a plurality of T-shaped prefabricated lattice beams form a top slope beam side by side, and reinforcing steel bars at the end parts among the lattice beams can be spliced mutually during hoisting;
s3, fixing the stay wire type surface displacement sensor in a reserved groove of the T-shaped prefabricated lattice beam, enabling a rope outlet of the stay wire type surface displacement sensor to be in butt joint with a reserved pipeline and keep parallel, pulling a steel wire rope in the stay wire type surface displacement sensor to the maximum measuring range by using stay wire equipment, and slowly returning the steel wire rope, wherein the steel wire rope does not rub the reserved pipeline in the process; the steel wire rope is pulled to a groove of the T-shaped lattice beam at the top, the steel wire rope is fixedly connected with a measured point of the top slope beam, so that the stay wire type surface displacement sensor and the measured point of the top slope beam are flush with the reserved pipeline, the steel wire rope is always in a tension state and has constant tension, and the displacement of the T-shaped prefabricated lattice beam and the cross-shaped prefabricated lattice beam causes the measured point of the top slope beam to generate displacement, so that the stay wire type surface displacement sensor and the steel wire rope generate relative displacement;
s4, binding reinforcing steel bars at the end parts of the T-shaped prefabricated lattice beam and the cross-shaped prefabricated lattice beam, erecting a template, pouring concrete, vibrating the concrete tightly by using a vibrating rod, and then curing and removing the template;
when the surface of the side slope collapses, the measured point in the top slope beam is driven to move, so that the steel wire rope connected with the measured point is pulled, and the steel wire rope drives the sensor transmission mechanism in the stay wire type displacement sensor to synchronously rotate with the encoder; when the displacement moves reversely, the automatic rotary device in the stay wire type displacement sensor automatically retracts the steel wire rope, and the tension of the steel wire rope is kept unchanged in the process of retracting the steel wire rope; thus outputting an electric signal proportional to the movement of the wire rope and converting the electric signal into the movement.
Further, the method also comprises the following steps:
and S5, anchor head processing, locking the anchor rod on the upper part of the anchor backing plate by using a nut, refilling a concrete protective cover for plugging, wherein the distance between the surface of the protective cover and the outer end of the anchor rod is at least 5 cm.
The invention has the beneficial effects that: stability reinforcement and safety monitoring of the side slope are achieved, compared with the mode that monitoring is achieved through manual visual inspection or measurement is achieved through a portable instrument in the prior art, integration of side slope reinforcement and safety monitoring is achieved, and the difficulty and cost of later-stage side slope safety monitoring are reduced.
Drawings
Fig. 1 is a schematic structural diagram of a surface displacement monitoring system for fabricated lattice beams according to the present invention.
Fig. 2 is a schematic side view of the surface displacement monitoring system for fabricated lattice beams according to the present invention.
Fig. 3 is a schematic structural view of a lattice beam unit of the surface displacement monitoring system for a fabricated lattice beam of the present invention.
Fig. 4 is a schematic structural diagram of a stay wire type surface displacement sensor of the surface displacement monitoring system for a fabricated lattice beam according to the present invention.
Fig. 5 is a schematic structural view of a T-shaped prefabricated lattice beam for a surface displacement monitoring system of an assembled lattice beam according to the present invention.
Fig. 6 is a schematic structural view of a cross-type prefabricated lattice beam for a surface displacement monitoring system of an assembled lattice beam according to the present invention.
Fig. 7 is a first structural schematic view of the anchor rod structure of the surface displacement monitoring system for fabricated lattice beams of the present invention.
Fig. 8 is a second structural schematic of the anchor rod structure of the surface displacement monitoring system for fabricated lattice beams of the present invention.
Fig. 9 is a surface displacement monitoring schematic diagram of the surface displacement monitoring system for fabricated lattice beams of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
Referring to fig. 1 to 8, the invention provides a surface displacement monitoring system for an assembled lattice beam, which realizes stability reinforcement and safety monitoring of a side slope, and compared with a mode of manual visual monitoring or measurement by a portable instrument in the prior art, realizes integration of side slope reinforcement and safety monitoring, and reduces difficulty and cost of side slope safety monitoring in the later period. Specifically, the surface displacement monitoring system for the assembled lattice beam comprises a side slope supporting mechanism and a side slope safety monitoring mechanism, wherein the side slope supporting mechanism and the side slope safety monitoring mechanism are arranged on a side slope, as shown in fig. 1, the side slope supporting mechanism comprises a top slope beam 10, a cross-shaped lattice beam 20, a toe slope beam 30, a toe slope cushion layer and an anchoring structure, the toe slope cushion layer is a reinforced concrete cushion layer poured at the bottom of the side slope, the top slope beam 10 and the toe slope beam 30 respectively comprise a plurality of T-shaped prefabricated lattice beams 101 which are sequentially spliced side by side, the toe slope beam 30 is paved on the toe slope cushion layer, the top slope beam 10 is paved at the top of the side slope, the top slope beam 10 serves as a measured point, and the toe slope beam 30 serves as a fixed point; as shown in fig. 4, the concrete structure of the T-shaped prefabricated lattice beam 101 is shown; the cross-shaped lattice beam 20 comprises a cross-shaped prefabricated lattice beam 201, a plurality of cross-shaped prefabricated lattice beams 201 are mutually spliced to form a net structure, the cross-shaped lattice beam 20 is laid on a side slope and is respectively connected with a slope top beam 10 and a toe beam 30, and as shown in fig. 5, the cross-shaped lattice beam 20 is a specific structure of the cross-shaped prefabricated lattice beam 201; the anchoring structure is arranged at the center of the cross-shaped prefabricated lattice beam 201 and used for fixing the cross-shaped prefabricated lattice beam 201 on a side slope; the specific structure of the anchoring structure will be explained in detail below.
Further, as shown in fig. 3, one T-shaped prefabricated lattice beam 101 in the top slope beam 10, a plurality of corresponding cross-shaped prefabricated lattice beams 201 in the cross-shaped lattice beam 20, and one T-shaped prefabricated lattice beam 101 in the foot slope beam 30 form a lattice beam unit 40, it can be understood that a plurality of corresponding cross-shaped prefabricated lattice beams 201 in the cross-shaped lattice beam 20, that is, a plurality of cross-shaped prefabricated lattice beams 201 under one T-shaped prefabricated lattice beam 101 in the top slope beam 10, the slope support mechanism includes a plurality of lattice beam units 40 connected in parallel in sequence, in this embodiment, as shown in fig. 5 and 6, three top ends of the T-shaped prefabricated lattice beam 101 are provided with outwardly protruding first reinforcing bars 102, four top ends of the cross-shaped prefabricated lattice beams 201 are provided with outwardly protruding second reinforcing bars 202, so that, when the T-shaped prefabricated lattice beams 101 and the T-shaped prefabricated lattice beams 101 are assembled, the first steel bar 102 and the first steel bar 102 are overlapped, and the first steel bar 102 and the second steel bar 102 can be connected by adopting binding, welding and other modes; similarly, when the T-shaped precast lattice beam 101 and the cross-shaped precast lattice beam 201 are assembled, and the cross-shaped precast lattice beam 201 are assembled, the connection between the two can be achieved by using the same overlapping manner, and a detailed description thereof is omitted in this embodiment.
As shown in fig. 2, the safety monitoring mechanism includes a stay wire type surface displacement sensor 50 and a steel wire rope 60, and the safety monitoring mechanism is mounted on the lattice beam unit 40, and in practice, the number of the safety monitoring mechanisms can be controlled according to requirements; referring to fig. 4, the T-shaped prefabricated lattice beam 101 is provided with a reserved groove 103 for installing the stay wire type surface displacement sensor 50, the T-shaped prefabricated lattice beam 101 and the cross-shaped prefabricated lattice beam 201 are both provided with a reserved pipe 203 for allowing the steel wire rope 60 to pass through, two ends of the steel wire rope 60 are respectively connected to the stay wire type surface displacement sensor 50 and the measured point of the pitched roof beam 10 which are located in the reserved groove 103 of the two T-shaped prefabricated lattice beams 101, so that the measured point of the stay wire type surface displacement sensor 50 and the measured point of the pitched roof beam 10 and the reserved pipe 203 are aligned, in this embodiment, the stay wire type surface displacement sensor 50, the measured point of the pitched roof beam 10 and the reserved pipe 203 are in the same straight line, the steel wire rope 60 is in a tensioned state and keeps the tension constant, so that the stay wire type surface displacement sensor 50 is in a continuous monitoring state, and simultaneously, because the steel wire rope 60, the steel wire rope 60 is in a suspended state in the reserved pipe 203 and does not contact with the inner wall of the reserved pipe 203, so that the monitoring accuracy is improved.
With this design, as shown in fig. 9, when a landslide occurs, the displacement of the soil body drives the lattice beam unit 40 to displace, and in general, the slope top beam 10 slides partially downwards to form relative displacement with the slope foot beam 30, i.e., relative displacement occurs between the measured point and the fixed point, so that the stay wire type surface displacement sensor 50 is displaced, the pull-wire surface displacement sensor 50 and the steel wire rope 60 are relatively displaced, the steel wire rope 60 is contracted, the pull-wire surface displacement sensor 50 can convert the mechanical displacement into a measurable electric signal in linear proportion, when the measured object generates displacement, the steel wire rope 60 of the stay wire type surface displacement sensor 50 connected with the measured object is pulled, the stay wire type surface displacement sensor 50 is driven by the steel wire rope 60 to synchronously rotate with the encoder, the linear displacement is converted into the angular displacement of the transmission mechanism, and the relative displacement variation of the measured point is calculated through the angle variation. When the displacement moves reversely, the automatic rotary device in the stay wire type surface displacement sensor automatically retracts the rope, and the tension of the rope is kept unchanged in the process of extending and retracting the rope; thereby outputting an electrical signal proportional to the amount of rope movement. The stay wire type surface displacement sensor is provided with an independent automatic wire arranging mechanism, so that the tensile rope is automatically and uniformly arranged, the sensor is ensured to have high independent linear precision, and the service life of the sensor is longer; thereby playing the role of monitoring the safety of the side slope. Because the steel wire rope 60 is in a suspended state in the reserved pipeline 203 and does not contact with the inner wall of the reserved pipeline 203, when slight displacement occurs in the soil body, the stay wire type surface displacement sensor 50 can also realize monitoring, so that the monitoring accuracy is improved.
Compared with the existing slope prefabricated lattice beam support technology, the surface displacement monitoring system for the assembled lattice beam has the advantages that the stay wire type surface displacement sensor 50 is combined with the prefabricated lattice beam to carry out slope stability reinforcement and safety monitoring, the integration of slope reinforcement and safety monitoring is realized, and the difficulty and cost of later-stage slope safety monitoring are reduced. In addition, the slope supporting mechanism is formed by splicing a plurality of prefabricated lattice beam units 40, compared with the construction process of the lattice beam cast in situ on the slope surface in the prior art, the construction process only needs hoisting and connecting on site, and is simple, convenient and efficient in construction and low in technical requirement.
As shown in fig. 5, a reinforcing steel bar passes through the preformed groove 103 of the T-shaped prefabricated lattice beam 101, and the stay wire type surface displacement sensor 50 is welded on the reinforcing steel bar, so that the stay wire type surface displacement sensor 50 and the T-shaped prefabricated lattice beam 101 form a whole, which avoids generating an error signal in the monitoring process, and improves the stability of the stay wire type surface displacement sensor 50. In the welding process, as shown in fig. 4, the rope outlet 501 of the stay wire type surface displacement sensor 50 is butted with the reserved pipeline in parallel, the steel wire rope inside the stay wire type surface displacement sensor 50 is slowly pulled out to the maximum range, and in the pulling-out process, the steel wire rope 60 and the rope outlet 501 are kept not to be rubbed, so that the tension of the steel wire rope is prevented from changing to influence the measurement result; the wire rope 60 should be pulled out in a direction parallel to the side surface of the pull-wire type surface displacement sensor 50, and the wire rope 60 is slowly returned.
As for the anchor rod structure, as shown in fig. 7 and 8, the present invention provides a specific embodiment, the anchor structure includes an anchor rod 701, an anchor backing plate 702, a nut 703 and an anchor hole; the anchor backing plate 702 is laid at the center of the top surface of the cross-shaped prefabricated lattice beam 201, and the anchor holes are formed in the centers of the anchor backing plate 702 and the cross-shaped prefabricated lattice beam 201, in this embodiment, in order to avoid interference between the anchor holes on the cross-shaped prefabricated lattice beam 201 and the reserved pipelines 203, the center positions of the reserved pipelines 203 of the T-shaped prefabricated lattice beam 101 and the cross-shaped prefabricated lattice beam 201 can be deviated. The anchor rod 701 is inserted into the anchor hole and is fastened inside the slope through cement mortar, and the anchor rod 701 protrudes out of the top end of the anchor backing plate 702 and is locked through a nut 703. In addition, a protective cover 704 is fixedly arranged outside the anchor rod 701 and the nut 703.
In addition, the present invention also provides a surface displacement monitoring method for an assembled lattice beam, which includes the following steps:
s1, preparing construction of a slope safety monitoring mechanism, cleaning a slope surface, pouring a reinforced concrete cushion layer at the bottom of a slope to form a slope cushion layer, and drilling anchor holes;
s2, hoisting the T-shaped prefabricated lattice beam 101 and the cross-shaped prefabricated lattice beam 201 to corresponding positions of a side slope from bottom to top by using a crane, and installing the T-shaped prefabricated lattice beam 101 on a slope toe cushion layer to form a slope toe beam 30; the anchor hole of the cross prefabricated lattice beam 201 is aligned with the anchor rod 701, so that the anchor rod 701 penetrates through the anchor hole to be hung on the side slope; hoisting the T-shaped prefabricated lattice beams 101 to the top of the side slope, wherein a plurality of T-shaped prefabricated lattice beams 101 are arranged side by side to form a top slope beam 10, and reinforcing steel bars at the end parts among the lattice beams can be spliced mutually during hoisting;
s3, fixing the stay wire type surface displacement sensor 50 on the steel bar of the reserved groove 103 of the T-shaped prefabricated lattice beam 101, and enabling the rope outlet of the stay wire type surface displacement sensor 50 to be in butt joint with the reserved pipeline 203 and to be parallel to the reserved pipeline, in the embodiment, the stay wire type surface displacement sensor 50 is fixed on the steel bar of the reserved groove 103 of the T-shaped prefabricated lattice beam 101, the steel wire rope 60 inside the stay wire type surface displacement sensor 50 is pulled to the maximum measuring range by using stay wire equipment and then slowly put back, and in the process, the steel wire rope 60 does not rub against the reserved pipeline 203, so that the tension of the steel wire rope is prevented from changing to influence the measuring result; the steel wire rope 60 is pulled to a groove of the T-shaped lattice beam at the top, the steel wire rope 60 is fixedly connected with a measured point of the pitched roof beam 10, the stay wire type surface displacement sensor 50 and the measured point of the pitched roof beam 10 are aligned with the reserved pipeline 203, the steel wire rope 60 is always in a tension state and has constant tension, and the stay wire type surface displacement sensor 50 generates displacement through the displacement of the T-shaped prefabricated lattice beam 101 and the cross-shaped prefabricated lattice beam 201, so that the two stay wire type surface displacement sensors and the steel wire rope 60 generate relative displacement;
s4, binding reinforcing steel bars at the end parts of the T-shaped prefabricated lattice beam 101 and the cross-shaped prefabricated lattice beam 201, erecting a template, pouring concrete, vibrating the concrete by using a vibrating rod to compact the concrete, and then maintaining and removing the template;
when the surface of the side slope collapses, the measured point in the top slope beam 10 is driven to move, so that a steel wire rope connected with the measured point is pulled, and the steel wire rope drives a sensor transmission mechanism in the stay wire type displacement sensor to synchronously rotate with an encoder; when the displacement moves reversely, the automatic rotary device in the stay wire type displacement sensor automatically retracts the steel wire rope, and the tension of the steel wire rope is kept unchanged in the process of retracting the steel wire rope; thus outputting an electric signal proportional to the movement of the wire rope and converting the electric signal into the movement.
And S5, anchor head treatment, wherein the anchor rod 701 on the upper part of the anchor backing plate 702 is locked by a nut 703, a concrete protective cover is refilled for plugging, and the surface of the protective cover is at least 5cm away from the outer end of the anchor rod 701.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A surface displacement monitoring system for a fabricated lattice beam, comprising: the device comprises a slope supporting mechanism and a slope safety monitoring mechanism;
the slope supporting mechanism comprises a slope top beam, a cross lattice beam and a slope foot beam, wherein the slope top beam and the slope foot beam respectively comprise a plurality of T-shaped prefabricated lattice beams which are sequentially spliced side by side, the slope top beam is laid at the top of the slope, the slope foot beam is laid at the bottom of the slope, the slope top beam serves as a measured point, and the slope foot beam serves as a fixed point; the cross lattice beam comprises cross prefabricated lattice beams, a plurality of cross prefabricated lattice beams are mutually spliced to form a net structure, and the cross lattice beams are laid and fixed on the side slope and are respectively connected with the top slope beam and the toe slope beam; one T-shaped prefabricated lattice beam in the slope top beam, the corresponding cross-shaped prefabricated lattice beam in the cross-shaped lattice beam and one corresponding T-shaped prefabricated lattice beam in the slope foot beam form a lattice beam unit, and the slope supporting mechanism comprises a plurality of lattice beam units which are sequentially connected in parallel;
the safety monitoring mechanism comprises a stay wire type surface displacement sensor and a steel wire rope, a reserved groove for mounting the stay wire type surface displacement sensor is formed in the T-shaped prefabricated lattice beam, reserved pipelines for enabling the steel wire rope to penetrate through are formed in the T-shaped prefabricated lattice beam and the cross-shaped prefabricated lattice beam, two ends of the steel wire rope are connected to the stay wire type surface displacement sensor and the measured point which are located in the reserved groove of the two T-shaped prefabricated lattice beams respectively, the stay wire type surface displacement sensor, the measured point of the slope top beam and the reserved pipeline are aligned, the steel wire rope is in a tensioning state and keeps the tension unchanged, and the steel wire rope is in a suspended state in the reserved pipeline and does not contact with the inner wall of the reserved pipeline.
2. A surface displacement monitoring system for a fabricated lattice beam in accordance with claim 1, wherein: the prefabricated lattice beam of T type all is provided with outside convex first reinforcing bar on the three top, all be provided with outside convex second reinforcing bar on four tops of prefabricated lattice beam of cross type.
3. A surface displacement monitoring system for a fabricated lattice beam in accordance with claim 2, wherein: and a steel bar penetrates through a reserved groove of the T-shaped prefabricated lattice beam, and the stay wire type surface displacement sensor is welded on the steel bar.
4. A surface displacement monitoring system for a fabricated lattice beam in accordance with claim 1, wherein: the slope bottom is provided with the toe bed course, and this toe bed course is for pouring the reinforced concrete bed course in the side slope bottom, the toe roof beam is laid on the toe bed course.
5. A surface displacement monitoring system for a fabricated lattice beam in accordance with claim 1, wherein: the cross prefabricated lattice beam is fixed on the side slope through an anchoring structure, and the anchoring structure comprises an anchor rod, an anchor backing plate, a nut and an anchor hole;
the anchor backing plate is laid in the center of the top surface of the cross-shaped prefabricated lattice beam, the anchor hole is formed in the centers of the anchor backing plate and the cross-shaped prefabricated lattice beam, the anchor rod is inserted into the anchor hole and is fastened inside the side slope through cement mortar, and the anchor rod protrudes out of the top end of the anchor backing plate and is locked through a nut.
6. A surface displacement monitoring system for a fabricated lattice beam in accordance with claim 5, wherein: and a protective cover is fixedly arranged outside the anchor rod and the nut.
7. A surface displacement monitoring method for a fabricated lattice beam, the monitoring method comprising the steps of:
s1, preparing construction of a slope safety monitoring mechanism, cleaning a slope surface, pouring a reinforced concrete cushion layer at the bottom of a slope to form a slope cushion layer, and drilling anchor holes;
s2, hoisting the T-shaped prefabricated lattice beam and the cross-shaped prefabricated lattice beam to corresponding positions of the side slope from bottom to top by using a crane, and installing the T-shaped prefabricated lattice beam on the slope toe cushion layer to form the slope toe beam; aligning the anchor holes of the cross prefabricated lattice beams with the anchor rods, and enabling the anchor rods to penetrate through the anchor holes to be hung on the side slopes; hoisting the T-shaped prefabricated lattice beams to the top of the side slope, wherein a plurality of T-shaped prefabricated lattice beams form a top slope beam side by side, and reinforcing steel bars at the end parts among the lattice beams can be spliced mutually during hoisting;
s3, fixing the stay wire type surface displacement sensor on a steel bar of a reserved groove of the T-shaped prefabricated lattice beam, enabling a rope outlet of the stay wire type surface displacement sensor to be in butt joint with a reserved pipeline and keep parallel, pulling a steel wire rope in the stay wire type surface displacement sensor to the maximum measuring range by using stay wire equipment, and slowly returning the steel wire rope, wherein the steel wire rope does not rub the reserved pipeline in the process; the steel wire rope is pulled to a groove of the T-shaped lattice beam at the top, the steel wire rope is fixedly connected with a measured point of the slope top beam, so that the stay wire type surface displacement sensor and the measured point of the slope top beam are aligned with a reserved pipeline, the steel wire rope is always in a tension state and has constant tension, and the displacement of the T-shaped prefabricated lattice beam and the cross-shaped prefabricated lattice beam causes the measured point of the slope top beam to generate displacement, so that the stay wire type surface displacement sensor and the steel wire rope generate relative displacement;
s4, binding reinforcing steel bars at the end parts of the T-shaped prefabricated lattice beam and the cross-shaped prefabricated lattice beam, erecting a template, pouring concrete, vibrating the concrete tightly by using a vibrating rod, and then curing and removing the template;
when the surface of the side slope collapses, the measured point in the top slope beam is driven to move, so that the steel wire rope connected with the measured point is pulled, and the steel wire rope drives the sensor transmission mechanism in the stay wire type displacement sensor to synchronously rotate with the encoder; when the displacement moves reversely, the automatic rotary device in the stay wire type displacement sensor automatically retracts the steel wire rope, and the tension of the steel wire rope is kept unchanged in the process of retracting the steel wire rope; thus outputting an electric signal proportional to the movement of the wire rope and converting the electric signal into the movement.
8. A surface displacement monitoring method for a fabricated lattice beam according to claim 7, further comprising the steps of:
and S7, anchor head processing, locking the anchor rod on the upper part of the anchor backing plate by using a nut, refilling a concrete protective cover for plugging, wherein the distance between the surface of the protective cover and the outer end of the anchor rod is at least 5 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010006917.8A CN111088821A (en) | 2020-01-03 | 2020-01-03 | Surface displacement monitoring system and monitoring method for assembled lattice beam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811422A (en) * | 2020-07-30 | 2020-10-23 | 中国水利水电科学研究院 | Rock slope deformation on-line monitoring collection system based on anchor rope is firm |
| CN113882403A (en) * | 2021-10-18 | 2022-01-04 | 重庆交通大学 | Roadbed slope integral green protection structure and construction method thereof |
| CN115655366A (en) * | 2022-10-25 | 2023-01-31 | 广东御鑫建筑工程有限公司 | Slope geotechnical engineering monitoring system |
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2020
- 2020-01-03 CN CN202010006917.8A patent/CN111088821A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811422A (en) * | 2020-07-30 | 2020-10-23 | 中国水利水电科学研究院 | Rock slope deformation on-line monitoring collection system based on anchor rope is firm |
| CN113882403A (en) * | 2021-10-18 | 2022-01-04 | 重庆交通大学 | Roadbed slope integral green protection structure and construction method thereof |
| CN115655366A (en) * | 2022-10-25 | 2023-01-31 | 广东御鑫建筑工程有限公司 | Slope geotechnical engineering monitoring system |
| CN115655366B (en) * | 2022-10-25 | 2024-02-02 | 广东御鑫建筑工程有限公司 | Side slope geotechnical engineering monitoring system |
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