CN117822613A - Active and passive integrated protection full-prefabricated frame beam and construction and repair method thereof - Google Patents
Active and passive integrated protection full-prefabricated frame beam and construction and repair method thereof Download PDFInfo
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- 239000011148 porous material Substances 0.000 claims description 18
- 238000009417 prefabrication Methods 0.000 claims description 14
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Abstract
The invention discloses a full prefabricated frame beam with active and passive integrated protection and a construction and repair method thereof, wherein the full prefabricated frame beam comprises a plurality of frame beam cross beams and longitudinal beams, two adjacent longitudinal beams are hinged, and two adjacent cross beams are hinged; the cross beam and the longitudinal beam comprise a hole-filling precast beam and two L-shaped precast beams; the two L-shaped precast beams are correspondingly positioned at two sides of the hole-wedge precast beam and are rotationally connected with the hole-wedge precast beam, and can finely rotate along with soil body to carry out adaptive protection on a slope. The two adjacent longitudinal beams and the two adjacent transverse beams are matched and hinged through the second hinging heads of the corresponding L-shaped precast beams, threaded steel rods are arranged on the second hinging heads, the threaded steel rods on the two hinged second hinging heads are connected into a whole through an externally-attached prestress steel cable, and active stress is generated on a slope soil body.
Description
Technical Field
The invention belongs to the technical field of slope protection, and relates to a fully prefabricated frame beam for active and passive integrated protection and a construction and repair method thereof.
Background
China is a country with a plurality of geological disasters, wherein landslide in side slope disasters is large, and casualties and caused economic property losses are difficult to measure. Therefore, the protection of the side slope is very necessary, not only can the personnel safety, the infrastructure and the ecological environment be protected, but also the economic and social benefits are achieved. The prestressed anchor cable frame beam is a common slope supporting structure and is used for preventing landslide and collapse of a slope, but due to the adoption of cast-in-situ and rigid structures, the protection effect and the construction convenience are required to be improved. To solve this problem, there has been proposed a hinged frame beam which is assembled from prefabricated beams and which is slightly rotated in one direction on a vertical plane to the slope to release the unidirectional stress of the section. However, if the side slope is uneven in slotting or the side slope is inconsistent in deformation due to the action of climatic environment, when adjacent cross beams or longitudinal beams on the hinge type frame beams are not on the same plane, the phenomenon that the cross beams and the longitudinal beams are twisted along the plane can cause torsional stress at the hinge position, and the hinge type frame beams cannot carry out adaptive protection on the side slope, so that the hinge type frame beams are not suitable for side slope protection of special soil such as red clay and expansive soil.
Disclosure of Invention
The first aim of the embodiment of the invention is to provide a full prefabricated frame beam with active and passive integrated protection, so as to solve the problems that when adjacent cross beams or longitudinal beams on the existing hinged frame beam are not on the same plane, the cross beams and the longitudinal beams have the phenomenon of torsion along the plane, so that torsion stress exists at the hinged position, and the adaptive protection of a side slope cannot be realized.
The second aim of the embodiment of the invention is to provide a construction method of the full prefabricated frame beam with active and passive integrated protection.
The third object of the embodiment of the invention is to provide a method for repairing an all-prefabricated frame beam with active and passive integrated protection.
The first technical scheme adopted by the embodiment of the invention is as follows: the full prefabricated frame beam comprises a plurality of frame beam cross beams and longitudinal beams, wherein two adjacent longitudinal beams are hinged, and two adjacent cross beams are hinged;
the transverse beam and the longitudinal beam comprise a hole-filling precast beam and two L-shaped precast beams;
the two L-shaped precast beams are correspondingly positioned at two sides of the hole-filling precast beam and are rotatably connected with the hole-filling precast beam.
Further, one end of each L-shaped precast beam is provided with an L-shaped second hinge joint;
The two adjacent longitudinal beams and the two adjacent transverse beams are hinged in a matched mode through the second hinging heads of the corresponding L-shaped prefabricated beams, and the L-shaped prefabricated beams can vertically rotate around the hinging points;
a threaded steel rod is arranged on the second hinge head;
the threaded steel rods on the two hinged second hinges are connected into a whole through an externally-attached prestress steel cable.
Further, a steel tube concrete column is arranged at one end of the L-shaped precast beam connected with the hole-filling precast beam;
reserved pore canals matched and spliced with the concrete filled steel tube column are respectively arranged at two ends of the hole-filling precast beam;
the steel tube concrete column of the L-shaped precast beam is inserted into a reserved pore canal on the wedge-shaped hole precast beam.
Further, in each longitudinal beam, a supporting steel plate is arranged between the L-shaped precast beam positioned above and the hole-wedge precast beam;
the supporting steel plate is inserted into the soil body, so that the L-shaped precast beam above the supporting steel plate is prevented from sliding downwards.
Further, an avoidance hole is reserved in the center of the support steel plate, and the avoidance hole is matched with the steel tube concrete column of the L-shaped precast beam;
the steel tube concrete column of the L-shaped precast beam penetrates through the avoidance hole in the center of the supporting steel plate below and is inserted into the reserved hole channel of the hole-filling precast beam;
the top of one side of the supporting steel plate, which is close to the hole-filling precast beam, is provided with a baffle plate, and the baffle plate is arranged at the top of the hole-filling precast beam and is clung to the hole-filling precast beam;
The two sides of the supporting steel plate are respectively sleeved on the corresponding anchor rods, the anchor rods are anchored in soil, and the supporting steel plate can move up and down along the anchor rods;
the spring is sleeved on the anchor rod and arranged between the supporting steel plate and a nut at the top of the anchor rod;
the device can prevent the hole-wedge precast beam from rotating greatly while slightly rotating to carry out adaptive protection on the side slope.
Further, a plurality of cross beams are hinged in sequence to form a transverse part;
the longitudinal beams are hinged in sequence to form a longitudinal part;
two ends of the transverse part and the longitudinal part are respectively hinged with corresponding cross-shaped four-hinge piers;
an anchor rope hole is formed in the center of each cross-shaped four-hinged pier, and one end of each pre-stressed anchor rope is locked through the anchor rope hole, and the other end of each pre-stressed anchor rope is fixed in the soil body;
each cross-shaped four-hinge pier is provided with an L-shaped first hinge joint, the cross-shaped four-hinge piers are hinged with second hinge joints of the L-shaped precast beams of the transverse part and the longitudinal part through the first hinge joints, and the second hinge joints of the L-shaped precast beams can vertically rotate around the hinge joints;
threaded steel rods are arranged on the first hinge joint and the second hinge joint;
the threaded steel rods on the first articulated joint and the second articulated joint are connected into a whole through an externally attached prestress steel cable;
The tip of first articulated head and second articulated head is circular-arc type, and the joint gap department of first articulated head and second articulated head is provided with the angle steel.
The second technical scheme adopted by the embodiment of the invention is as follows: the construction method of the full prefabricated frame beam with active and passive integrated protection comprises the following steps:
step S1, cleaning a slope: the construction machinery is adopted to build slopes in layers from top to bottom, each grade of designed slope is excavated in layers, or the same grade of slope is divided into a plurality of sections, excavation is carried out at intervals, protection is carried out in sections, when the slope is excavated to the anchor cable position, half of the distance between two adjacent anchor cable holes is continuously excavated downwards along the designed slope, anchor cable drilling equipment is conveniently placed at the position, and then broken stones and residual branches of the slope are cleaned up;
step S2, paving a vegetation blanket: after digging a fixed vegetation blanket ditch, spreading the vegetation blanket, placing the front end of the vegetation blanket into the ditch, filling soil, compacting, fixing the vegetation blanket by using steel bars, spreading the vegetation blanket along a slope, fully contacting the vegetation blanket with the ground through compacting treatment, and fixing the vegetation blanket on the slope;
s3, construction of a prestressed anchor cable: cutting off vegetation carpets at corresponding positions, and performing prestress anchor cable construction at marked anchor cable holes, wherein the construction comprises measuring lofting, hole forming, cable braiding, anchor cable installation and grouting;
S4, construction of a full prefabricated frame beam with active and passive integrated protection: the method comprises the steps of constructing all prefabricated frame beams with active and passive protection in a grading manner from bottom to top, and constructing a longitudinal part and then a transverse part of each stage of frame beam;
s5, tensioning and locking the prestressed anchor cable: tensioning and locking the slurry of the prestressed anchor cable with the cross-shaped four-hinged pier after the slurry of the prestressed anchor cable reaches the design strength, and determining tensioning and locking modes of the prestressed anchor cable through an on-site tensioning test; the pre-stressed anchor cable is tensioned and locked in stages, after the tensioning is designed, compensation tensioning is carried out for the first time, the pre-stressed anchor cable with the length of 5 cm to 10cm is reserved from the anchor device, the rest part is cut off, and then the pre-stressed anchor cable is locked;
s6, sealing anchors: and filling gaps among the anchor backing plate and the anchor head by using cement paste, and finally sealing the anchor head by adopting concrete with the strength not lower than C25.
Further, in the step S4, for the vertical portion of each stage of frame beam, the following construction process is performed:
cutting off vegetation blanket according to the position of the marked anchor cable hole, downwards excavating 30-40 cm, forming a foundation grooving for deeply burying a vertical part of a frame beam, excavating a supporting steel plate groove along the vertical direction of the foundation grooving, placing a supporting steel plate in the supporting steel plate groove, enabling the depth of the supporting steel plate groove to be larger than that of the foundation grooving, and then constructing a longitudinal beam of the vertical part:
For each longitudinal beam, the steel tube concrete column of the L-shaped precast beam positioned above is inserted into the hole-inserted precast beam through the avoiding hole in the center of the supporting steel plate below the steel tube concrete column, and the steel tube concrete column of the other L-shaped precast beam is inserted into the hole-inserted precast beam above, so that each L-shaped precast beam is ensured not to slide in a foundation grooving in the construction process;
the uppermost L-shaped precast beam is hinged with a cross-shaped four-hinged pier above the uppermost L-shaped precast beam, two adjacent L-shaped precast beams are hinged, and the lowermost L-shaped precast beam is hinged with a cross-shaped four-hinged pier below the lowermost L-shaped precast beam;
the angle steel is arranged at the gap between the top ends of the first hinge joint and the second hinge joint;
the springs are arranged on the anchor rods and the supporting steel plates, and the springs are fixed by nuts;
correspondingly tying the hinged cross-shaped four-hinged pier with the L-shaped precast beam or the threaded steel rods of the two hinged L-shaped precast beams by using an externally attached prestress steel cable to form a longitudinal part of the full precast frame beam which is integrally protected by the active and passive components;
for the transverse part of each stage of frame beam, the following construction process is carried out:
cutting off a vegetation blanket according to the positions of the marked anchor cable holes, and excavating downwards for 30-40 cm to form a foundation slot for deeply burying the transverse part of each stage of frame beam;
Two L-shaped precast beams and a hole-filling precast beam are used as a group of assembled cross beams, and then the assembled cross beams are hoisted into cross beam grooves corresponding to foundation grooves on the supporting surface layer;
hoisting the cross-shaped four-hinged pier above the corresponding four-hinged pier slot on the foundation slot to hover, enabling the pre-stressed anchor cable to pass through the anchor cable hole on the cross-shaped four-hinged pier, releasing the hoisting rope, and placing the cross-shaped four-hinged pier into the four-hinged pier slot;
the first articulated head of the cross four-hinged pier is articulated with the second articulated head of the L-shaped precast beam of the adjacent cross beam, the second articulated head of the corresponding L-shaped precast beam in the two adjacent cross beams is articulated, angle steel is arranged at the gap between the top ends of the first articulated head and the second articulated head, and the cross beam arrangement is completed;
the cross-shaped four-hinged pier, the L-shaped precast beams of the adjacent cross beams and the threaded steel bars of the L-shaped precast beams corresponding to the two adjacent cross beams are tied by using an externally-attached prestress steel cable to form the transverse part of the full precast frame beam with active and passive integrated protection;
after the foundation slotting is excavated, the dimension and flatness of the foundation slotting are measured, and the condition that the excavated surface is uneven or sundries exist is prevented.
Further, after the L-shaped precast beam of the transverse part of each stage of frame beam is connected with the hole-filling precast beam through a steel tube concrete column, the steel tube concrete column part is inserted into the hole-filling precast beam, and part of the steel tube concrete column part is exposed outside the hole-filling precast beam;
During the excavation process of foundation slotting of the transverse part of each stage of frame beam:
when the hole-filling prefabrication Liang Kaicao of the cross beam is excavated, the excavation length of the hole-filling prefabrication Liang Kaicao is prolonged, and a space is reserved for the L-shaped prefabrication beam and the hole-filling prefabrication beam to be moved in the repairing process;
prefabricating Liang Kaicao on the transverse beams on the left side and the right side in a hole-filling way, and symmetrically excavating;
the dimensions and flatness of the foundation slotting are measured by placing a lightweight model consistent with the flatness and dimensions of the L-shaped precast beam and the hole-filling precast beam into the excavated foundation slotting.
The third technical scheme adopted by the embodiment of the invention is as follows: the method for repairing the full prefabricated frame beam with active and passive integrated protection comprises the following steps of:
working condition 1: the second hinge joint of the transverse L-shaped precast beam is damaged and repaired according to the following operation:
cutting off the steel tube concrete column, loosening the high-strength connecting bolt at the hinging point, and taking out the L-shaped precast beam and the steel tube concrete column;
dragging the structure at one side of the destroyed L-shaped precast Liang Mou to a direction away from the destroyed L-shaped precast beam, reserving a space for repairing the L-shaped precast beam, and further inserting a steel tube concrete column of the L-shaped precast beam at the dragged side into a reserved pore canal of the corresponding section-a-hole precast beam in the dragging process;
Hoisting the new L-shaped precast beam to a corresponding position, hinging the second hinging head of the new L-shaped precast beam with a corresponding first hinging head or second hinging head by adopting a high-strength connecting bolt, and re-pulling and connecting an externally-attached prestress steel cable;
the structure of the towed side of the new L-shaped precast beam is pulled back to the original position, so that the steel tube concrete column of the new L-shaped precast beam is inserted into the reserved pore canal of the corresponding belt-type hole precast beam, and the repair of the L-shaped precast beam is completed;
working condition 2: the transverse hole-blocking precast beam is damaged and repaired according to the following operation:
dragging the structure at one side of the damaged wedge hole precast Liang Mou to a direction away from the damaged wedge hole precast beam, leaving a space for repairing the wedge hole precast beam, and further inserting the steel tube concrete column of the L-shaped precast beam at the dragged side into a reserved pore canal of the corresponding wedge hole precast beam in the dragging process; then loosening the high-strength connecting bolt at the hinged part of the L-shaped precast beam at the other side of the wedge-shaped precast beam, and taking down the damaged wedge-shaped precast beam and the remaining L-shaped precast beam together;
replacing the new hole-filling precast beam, assembling and hoisting the disassembled L-shaped precast beam and the new hole-filling precast beam, and pulling the structure of the towed side of the new hole-filling precast beam back to the original position, thus completing the repair of the hole-filling precast beam;
Working condition 3: as no sliding space is reserved for the damage of the vertical part, the damaged L-shaped precast beam and/or the whole section of longitudinal beam where the hole-filling precast beam is positioned can be removed, lifted and repaired, and the new L-shaped precast beam and/or the hole-filling precast beam is replaced and then installed according to the construction method.
The embodiment of the invention has the beneficial effects that:
1. dividing a single hinged cross beam and a hinged longitudinal beam into two L-shaped prefabricated frame beams and a hole-filling prefabricated beam, wherein one end of one L-shaped prefabricated frame beam is hinged to a cross-shaped four-hinged pier through bolts, a steel pipe concrete column is arranged at the other end of the other L-shaped prefabricated frame beam to insert the hole-filling prefabricated beam, a steel pipe concrete column is arranged at one end of the other L-shaped prefabricated frame beam to insert the hole-filling prefabricated beam, and the other end of the other L-shaped prefabricated frame beam is hinged to the next hinged cross beam or the cross-shaped four-hinged pier to form a full prefabricated frame beam; the hole-penetrating precast beam is connected with two L-shaped precast beams through a cylindrical steel tube concrete column, so that the hole-penetrating precast beam can follow the soil body to perform fine rotation to adaptively protect the anchored slope soil body, and the problem that when adjacent cross beams or longitudinal beams on the existing hinge type frame beam are not on the same plane, the cross beams or longitudinal beams are twisted along the plane, torsional stress exists at the hinge position and the slope cannot be adaptively protected is solved;
2. The fully prefabricated frame beam generates active stress on the soil body of the side slope through shrinkage and tensioning of the externally attached prestressed steel cable, so that the fully prefabricated frame beam with active and passive integrated protection is formed, and the stability of the soil body of the side slope is improved;
3. the anchor rod is driven into soil to support a side slope, and then a supporting steel plate is installed, so that the L-shaped precast beam is prevented from sliding downwards by the supporting steel plate, the supporting steel plate is matched with a baffle plate at the top and a spring, and the hole-filling precast beam is prevented from rotating greatly while being slightly rotated; the supporting steel plate can prevent sand from entering the reserved pore canal of the prefabricated beam with the hole, so that the anchoring performance of the main body structure is better improved;
4. the hinge joint of the frame beam is changed into an arc shape, and friction between the components is reduced by utilizing the angle steel backing plate so as to reduce the abrasion of the components;
5. compared with the traditional cast-in-situ frame beam and the traditional assembled frame beam component, the active and passive integrated protection full-prefabricated frame beam is more convenient to install, has great advantages in terms of the weight of a single component, and provides better measures for the aspects of construction safety, convenience, economy and the like;
6. the full prefabricated frame beam with the active and passive integrated protection is split into multiple parts, so that the full prefabricated frame beam has more pertinence in a repairing method, and the economic consumption of manpower, material resources and the like is reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic top view of a fully prefabricated frame beam with active and passive integrated protection according to an embodiment of the present invention.
Fig. 2 is a partially constructed three-dimensional schematic illustration of an active and passive integrally protected fully prefabricated frame beam in accordance with an embodiment of the invention.
Fig. 3 is a schematic diagram of the relative positions of anchor rods in foundation slotting construction according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a cross-type four-hinge pier according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of an L-shaped precast beam according to an embodiment of the present invention.
FIG. 6 is a schematic view of a hole-defining preform according to an embodiment of the present invention.
Fig. 7 is a schematic structural view of a supporting steel plate according to an embodiment of the present invention.
In the figure, the steel pipe concrete column is characterized by comprising a cross-shaped four-hinged pier, a 2L-shaped precast beam, a hole-forming precast beam, a 4 anchor rope hole, a 5 lifting hook, a 6 threaded steel rod, a 7 hinged hole, a 8 high-strength connecting bolt, a 9 externally attached prestressed steel cable, a 10 steel pipe concrete column, a 11 first hinged joint, a 12 second hinged joint, a 13 reserved pore canal, a 14 supporting steel plate, a 15 anchor rod, a 16 foundation grooving, a 17 angle steel, a 18 baffle plate and a 19 spring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment provides a full prefabricated frame beam with active and passive integrated protection, which comprises a plurality of frame beam cross beams and longitudinal beams, wherein two adjacent longitudinal beams are hinged, and two adjacent cross beams are hinged as shown in fig. 1-2;
the transverse beam and the longitudinal beam comprise a hole-filling precast beam 3 and two L-shaped precast beams 2;
two L-shaped precast beams 2 are correspondingly positioned at two sides of the hole-filling precast beam 3 and are rotatably connected with the hole-filling precast beam 3.
In some embodiments, as shown in fig. 5, one end of each of the L-shaped precast beams 2 is provided with an L-shaped second hinge 12;
the two adjacent longitudinal beams and the two adjacent transverse beams are connected in a matched manner through the second hinging heads 12 of the corresponding L-shaped prefabricated beams 2, so that the corresponding L-shaped prefabricated beams 2 can vertically rotate around the hinging points.
In some embodiments, the second joint 12 is provided with a threaded steel rod 6;
the threaded steel rods 6 on the two hinged second joints 12 are connected into a whole through the externally attached prestressed steel cable 9, so that the frame beam generates active stress on the internal soil body, and the stability of the slope soil body is improved.
In some embodiments, as shown in fig. 5, the end of the L-shaped precast beam 2 connected with the hole-defining precast beam 3 is provided with a concrete filled steel tubular column 10;
as shown in fig. 6, two ends of the prefabricated beam 3 are respectively provided with a reserved pore canal 13 which is matched and spliced with the concrete filled steel tube column 10;
the steel tube concrete column 10 of the L-shaped precast beam 2 is inserted into a reserved pore canal 13 on the hole-filling precast beam 3, and the hole-filling precast beam 3 is connected with two parts of the L-shaped precast beams 2 through the steel tube concrete column 10, so that the hole-filling precast beam 3 can finely rotate along with soil body to adaptively protect the anchored slope soil body.
In some embodiments, the depth of the pre-formed tunnels 13 is consistent with the length of the concrete filled steel tubular column 10.
In some embodiments, as shown in fig. 2, in each of said stringers, a bracing steel plate 14 is provided between the upper L-shaped preform 2 and the hole-defining preform 3;
The supporting steel plate 14 is inserted into the soil body to prevent the L-shaped precast beam 2 from sliding downwards, so that the anchoring performance of the main body structure is improved better.
In some embodiments, as shown in fig. 7, an avoidance hole is reserved in the center of the supporting steel plate 14, and the avoidance hole is matched with the steel tube concrete column 10 of the L-shaped precast beam 2;
the steel tube concrete column 10 of the L-shaped precast beam 2 is inserted into the reserved pore canal 13 of the hole-forming precast beam 3 through the avoiding hole in the center of the supporting steel plate 14 below.
In some embodiments, as shown in fig. 7, two sides of the supporting steel plate 14 are respectively sleeved on the corresponding anchor rods 15, the anchor rods 15 are anchored in the soil body, and the supporting steel plate 14 can slightly move up and down along the anchor rods 15;
a baffle 18 is arranged at the top of one side of the supporting steel plate 14 close to the hole-filling precast beam 3, and the baffle 18 is arranged at the top of the hole-filling precast beam 3 and is tightly attached to the hole-filling precast beam 3 to prevent the hole-filling precast beam 3 from rotating greatly;
the anchor rod 15 is sleeved with a spring 19, the spring 19 is arranged between the supporting steel plate 14 and a nut at the top of the anchor rod 15, the supporting steel plate 14 and the baffle 18 are matched with the spring 19, the spring 19 is contracted to allow the wedge-shaped hole precast beam 3 to slightly rotate, and the wedge-shaped hole precast beam 3 is matched to carry out adaptive protection on an anchored slope soil body.
In some embodiments, a plurality of the cross beams are hinged in sequence to form a transverse portion;
the longitudinal beams are hinged in sequence to form a longitudinal part;
both ends of the transverse portion and the longitudinal portion are hinged with the corresponding cross-shaped four-hinge piers 1 respectively.
In some embodiments, the transverse portion is formed by three cross members hinged in sequence and the longitudinal portion is formed by three stringers hinged in sequence.
In some embodiments, as shown in fig. 4, an anchor cable hole 4 is arranged in the center of each cross-shaped four-hinged pier 1, one end of the prestressed anchor cable is locked through the anchor cable hole 4, and the other end of the prestressed anchor cable is fixed in the soil body;
each cross-shaped four-hinge pier 1 is provided with an L-shaped first hinge joint 11;
the cross-shaped four-hinge pier 1 is hinged with the second hinge joint 12 of the L-shaped precast beam 2 of the transverse part and the longitudinal part through the first hinge joint 11, and the second hinge joint 12 of the L-shaped precast beam 2 can vertically rotate around the hinge joint.
In some embodiments, as shown in fig. 4 to 5, the first hinge joint 11 and the second hinge joint 12 are respectively provided with a hinge hole 7;
the first hinge joint 11 and the second hinge joint 12 are connected through a high-strength connecting bolt 8 penetrating through a hinge hole 7 on the first hinge joint, and the second hinge joint 12 can vertically rotate along a connecting point;
The second joint 12 of the two connected L-shaped precast beams 2 is connected by a high strength connecting bolt 8 penetrating the hinge hole 7, and the second joint 12 can vertically rotate along the connecting point.
In some embodiments, the first joint 11 is provided with a threaded steel rod 6;
the screw thread steel bars 6 on the first articulated joint 11 and the second articulated joint 12 which are articulated are connected into a whole through the externally-attached prestress steel rope 9, so that the frame beam generates active stress on the internal soil body, and the stability of the slope soil body is improved.
In some embodiments, the existing rectangular hinge joint has the problem of concentrated corner stress, the ends of the first hinge joint 11 and the second hinge joint 12 are arc-shaped, so that the performance of the component is improved, and the angle steel 17 is arranged at the joint gap of the first hinge joint 11 and the second hinge joint 12, so that the friction between the components is reduced, and the abrasion of the components is reduced.
In some embodiments, the first hinge 11 and the second hinge 12 are both provided with a hook 5, so as to facilitate the hoisting operation.
Example 2
The embodiment provides a construction method of a full prefabricated frame beam with active and passive integrated protection, which comprises the following steps:
step S1, cleaning a slope: the construction machinery is adopted to build slopes from top to bottom in a layered manner, each grade of designed slope is excavated in a layered manner, or the same grade of slope is divided into a plurality of sections, excavation and sectional protection are carried out at intervals, when the slope is excavated to the anchor cable position, half of the distance between two adjacent anchor cable holes 4 is continuously excavated downwards along the designed slope, anchor cable drilling equipment is conveniently placed at the position, and then broken stones and residual branches of the slope are cleaned up;
Step S2, paving a vegetation blanket: after digging a fixed vegetation blanket ditch, spreading the vegetation blanket, placing the front end of the vegetation blanket into the ditch, filling soil, compacting, fixing the vegetation blanket by using steel bars, spreading the vegetation blanket along a slope, fully contacting the vegetation blanket with the ground through slight compacting treatment, and fixing the vegetation blanket on the slope by using U-shaped nails;
s3, construction of a prestressed anchor cable: cutting off vegetation carpets at corresponding positions, and performing prestress anchor cable construction at the marked anchor cable hole 4, wherein the construction comprises measuring lofting, hole forming, cable braiding, anchor cable installation and grouting;
s4, construction of a full prefabricated frame beam with active and passive integrated protection: the method comprises the steps of constructing all prefabricated frame beams with active and passive protection in a grading manner from bottom to top, and constructing a longitudinal part and then a transverse part of each stage of frame beam;
s5, tensioning and locking the prestressed anchor cable: when the slurry of the prestressed anchor cable reaches the design strength, tensioning and locking the slurry with the cross-shaped four-hinged pier 1, and determining tensioning and locking modes of the prestressed anchor cable through an on-site tensioning test; tensioning and locking grading of the prestressed anchor cable, and executing the prestressed anchor cable strictly according to design requirements and operation rules; after the tensioning is designed, compensating and tensioning for one time at proper time, and leaving a 5-10 cm long prestressed anchor cable from the anchor, cutting off the rest part, and locking;
S6, sealing anchors: and filling gaps among the anchor backing plate and the anchor head with cement paste, and finally sealing the anchor head by adopting concrete with the strength not lower than C25, so that corrosion is prevented, and attractive appearance is achieved.
In some embodiments, in the step S2, the middle vegetation blanket overlap interval is 20 cm and the vegetation blanket overlap interval fixedly overlapped by using double-row staples is 10 cm by adopting an upward-downward method, and the vegetation blanket at the toe of the slope is compacted by soil to prevent being lifted by wind; the edges of the vegetation blanket are kept neat and consistent, and positions of the anchor rope holes 4 and the anchor rods 15 are marked by red paint according to the slope structural design.
In some embodiments, in step S4, different construction methods are provided for different construction conditions, considering that different construction conditions exist in the transverse direction and the vertical direction of the fully prefabricated frame beam of the active-passive integrated protection in the embodiment.
For the vertical portion of each stage of frame beams, the following construction procedure is followed:
cutting off a vegetation blanket according to the marked positions of the anchor cable holes 4, and excavating downwards for 30-40 cm to form a foundation slotting 16 for deeply burying a vertical part of a frame beam, excavating a supporting steel plate slot in the vertical direction of the foundation slotting 16, wherein the supporting steel plate slot is used for placing a supporting steel plate 14, the depth of the supporting steel plate slot is larger than that of the foundation slotting 16, and then constructing a longitudinal beam of the vertical part:
For each longitudinal beam, the steel tube concrete column 10 of the L-shaped precast beam 2 positioned above is inserted into the hole-forming precast beam 3 through the avoiding hole in the center of the supporting steel plate 14 positioned below the steel tube concrete column, and the steel tube concrete column 10 of the other L-shaped precast beam 2 is inserted into the hole-forming precast beam 3 positioned above, so that each L-shaped precast beam 2 is ensured not to slide in the foundation grooving 16 in the construction process;
the uppermost L-shaped precast beam 2 is hinged with a cross-shaped four-hinged pier 1 above the uppermost L-shaped precast beam, two adjacent L-shaped precast beams 2 are hinged, and the lowermost L-shaped precast beam 2 is hinged with a cross-shaped four-hinged pier 1 below the lowermost L-shaped precast beam;
an angle iron 17 is arranged at a gap at the top ends of the first hinge joint 11 and the second hinge joint 12;
the springs 19 are arranged on the anchor rods 15 and the supporting steel plates 14, and the springs 19 are fixed by nuts;
the hinged cross-shaped four-hinged pier 1 and the L-shaped precast beam 2 or the threaded steel rods 6 of the two hinged L-shaped precast beams 2 are correspondingly tied by using an externally-attached prestressed steel cable 9 to form the longitudinal part of the full precast frame beam with active and passive integrated protection.
For each longitudinal beam, in order to ensure that each L-shaped precast beam 2 does not slide in the foundation slotting 16, an anchor rod 15 can be firstly driven into the soil at a corresponding position, two L-shaped precast beams 2, a supporting steel plate 14 and a hole-forming precast beam 3 are assembled into a complete longitudinal beam, then the complete longitudinal beam is hoisted above the foundation slotting 16, and the supporting steel plate 14 is synchronously sleeved into the anchor rod 15 in the process of putting the complete longitudinal beam into the foundation slotting 16; the two L-shaped precast beams 2 are firstly assembled with the fixed steel plate 14 and the hole-filling precast beam 3 from a complete longitudinal beam, then the complete longitudinal beam is hoisted into a foundation grooving 16, and then an anchor rod 15 is beaten into soil; firstly, hoisting an L-shaped precast beam 2 into a foundation slotting 16, sleeving a supporting steel plate 14, punching an anchor rod 15 into soil, and then installing a lower hole precast beam 3 and another L-shaped precast beam 2; if the reserved holes on the support steel plate 14 are arranged as holes with n-shaped longitudinal sections, and the bottoms of the n-shaped reserved holes penetrate through the support steel plate 14 downwards, at the moment, the two L-shaped precast beams 2 and the prefabricated beam 3 with the holes can be assembled into longitudinal beams, and then the support steel plate 14 is installed in place; for each longitudinal beam, the displacement of the hole-filling precast beam 3 is limited by soil body, so that the displacement of the L-shaped precast beam 2 below each hole-filling precast beam 3 is avoided by hoisting or temporary supporting in the construction process. Only a part of specific construction steps are listed above, and in the actual operation process, corresponding adjustment can be made according to the requirements of the construction site based on the construction method description of the embodiment.
For the transverse part of each stage of frame beam, the following construction process is carried out:
cutting off a vegetation blanket according to the positions of the marked anchor cable holes 4, and excavating downwards for 30-40 cm to form a foundation grooving 16 for deeply burying the transverse part of each stage of frame beam, as shown in fig. 3;
two L-shaped precast beams 2 and a hole-filling precast beam 3 are used as a group of assembled cross beams, and then the assembled cross beams are hoisted into cross beam grooves corresponding to the foundation grooves 16 on the supporting surface layer;
hoisting the cross-shaped four-hinged pier 1 above the corresponding four-hinged pier slot on the foundation slot 16 to hover, enabling the pre-stressed anchor cable to pass through the anchor cable hole 4 on the cross-shaped four-hinged pier 1, slowly releasing the hoisting rope, and placing the cross-shaped four-hinged pier 1 into the four-hinged pier slot;
the first articulated head 11 of the cross-shaped four-hinged pier 1 is articulated with the second articulated head 12 of the L-shaped precast beam 2 of the adjacent cross beam, the second articulated head 12 of the corresponding L-shaped precast beam 2 in the two adjacent cross beams is articulated, and angle steel 17 is arranged at the gap between the top ends of the first articulated head 11 and the second articulated head 12 to finish the arrangement of the cross beams;
the cross-shaped four-hinged pier 1, the L-shaped precast beams 2 of the adjacent cross beams and the threaded steel rods 6 of the L-shaped precast beams 2 corresponding to the two adjacent cross beams are tied together by using an externally attached prestressed steel cable 9 to form the transverse part of the full precast frame beam with active and passive integrated protection.
In some embodiments, after the foundation trench 16 is excavated, the dimension and flatness of the foundation trench 16 need to be measured, so as to prevent the installation of subsequent components from being affected by the uneven excavation surface or the existence of debris such as stones.
In some embodiments, the dimensions and flatness measurements are made of the base trench 16 by placing a lightweight model that is consistent with the flatness and dimensions of the L-shaped preform beam 2 and the hole-defining preform beam 3 into the excavated base trench 16.
In some embodiments, after the L-shaped precast beam 2 of the transverse part of each stage of frame beam is connected with the hole-filling precast beam 3 through the steel pipe concrete column 10, the steel pipe concrete column 10 is partially inserted into the reserved pore canal 13 of the hole-filling precast beam 3, and the part is exposed outside the hole-filling precast beam 3;
when the L-shaped precast beam 2 or the hole-filling precast beam 3 is conveniently repaired, a repair space can be reserved by moving the L-shaped precast beam 2 and the hole-filling precast beam 3;
during excavation of the foundation trench 16 in the lateral portion of each stage of frame beam:
when the wedge hole prefabrication Liang Kaicao of the cross beam is excavated, the excavation length of the wedge hole prefabrication Liang Kaicao is prolonged, and a space is reserved for the L-shaped prefabrication beam 2 and the wedge hole prefabrication beam 3 to be moved in the repairing process;
prefabricating Liang Kaicao on the transverse beams on the left side and the right side in a hole-filling way, and symmetrically excavating;
The foundation slotting 16 excavated is suitable for subsequent repair, a space is reserved for the left and right fine adjustment after the subsequent hole-filling precast beam 3 is hoisted to the corresponding position, and after the foundation slotting 16 of each cross beam is excavated, the foundation slotting 16 is cleaned and polished, so that the friction influence of factors such as soil particles on the installation process of the subsequent L-shaped precast beam 2 and the hole-filling precast beam 3 is reduced.
In some embodiments, after the L-shaped precast beam 2 of the transverse part of each stage of frame beam is connected with the hole-forming precast beam 3 through the steel pipe concrete column 10, the length of the steel pipe concrete column 10 entering the inside of the reserved hole channel 13 is 16cm, and the length of the exposed part outside is 4cm;
during excavation of the foundation trench 16 in the lateral portion of each stage of frame beam:
the beams on the left side and the right side are dug 4cm more and 20cm more on the right side of the hole prefabrication Liang Kaicao;
the middle beam is cut 12cm more on the left and right sides of the hole prefabrication Liang Kaicao.
In some embodiments, during excavation of the foundation trench 16 of the longitudinal portion of each stage of frame beams:
considering that the vertical part has gravity component force, the fixing of the hole-expanding precast beam 3 is very unfavorable, the L-shaped precast Liang Kaicao of the longitudinal beams and the hole-expanding precast Liang Kaicao are excavated strictly according to the designed size, and after the foundation slotting 16 of each longitudinal beam is excavated, the foundation slotting 16 is cleaned and polished so as to reduce the friction influence of factors such as soil particles on the subsequent installation process of the L-shaped precast beam 2 and the hole-expanding precast beam 3.
Example 3
The embodiment provides a restoration method of an all-prefabricated frame beam with active and passive integrated protection, so that after a side slope is in dangerous condition, the all-prefabricated frame beam with active and passive integrated protection is damaged, dangerous condition treatment and side slope restoration are carried out on the side slope.
Working condition 1: the second joint 12 of the transverse L-shaped preform 2 is broken and repaired as follows:
cutting off the steel tube concrete column 10, loosening the high-strength connecting bolts 8 at the hinging points, and taking out the L-shaped precast beam 2 and the steel tube concrete column 10;
dragging the structure on one side of the damaged L-shaped precast beam 2 to a direction away from the damaged L-shaped precast beam 2, leaving a space for repairing the L-shaped precast beam 2, and further inserting the steel tube concrete column 10 of the L-shaped precast beam 2 on the dragged side into a reserved pore canal 13 of the corresponding hole-punching precast beam 3 in the dragging process;
hoisting the new L-shaped precast beam 2 to a corresponding position, hinging the second hinging head 12 of the new L-shaped precast beam 2 with a corresponding first hinging head 11 or second hinging head 12 by adopting a high-strength connecting bolt 8 again, and re-tying the externally-attached prestressed steel cable 9;
and (3) pulling the structure of the towed side of the new L-shaped precast beam 2 back to the original position, so that the steel tube concrete column 10 of the new L-shaped precast beam 2 is inserted into the reserved pore canal 13 of the corresponding hole-filling precast beam 3, and the repair of the L-shaped precast beam 2 is completed.
Working condition 2: the transverse hole-blocking precast beam 3 is damaged and repaired according to the following operation:
drawing the structure on one side of the broken hole-defining precast beam 3 in a direction away from the broken hole-defining precast beam 3, leaving a space for repairing the hole-defining precast beam 3, and further inserting the concrete filled steel tube column 10 of the L-shaped precast beam 2 on the drawn side into the reserved hole-defining precast beam 3 during drawing; then loosening the high-strength connecting bolt 8 at the hinged position of the L-shaped precast beam 2 at the other side of the hole-filling precast beam 3, and taking down the damaged hole-filling precast beam 3 and the rest of the L-shaped precast beam 2 together;
and (3) replacing the new hole-forming precast beam 3, assembling and hoisting the detached L-shaped precast beam 2 and the new hole-forming precast beam 3, and pulling the structure of which one side of the new hole-forming precast beam 3 is dragged away to the original position, thus completing the repair of the hole-forming precast beam 3.
Working condition 3: the vertical part is damaged, and a sliding space is not reserved, so that the damaged L-shaped precast beam 2 and/or the whole section of longitudinal beam where the hole-filling precast beam 3 is positioned can be removed, lifted and repaired, and the new L-shaped precast beam 2 and/or the hole-filling precast beam 3 is replaced and then installed according to a construction method.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (10)
1. The full prefabricated frame beam is characterized by comprising a plurality of frame beam cross beams and longitudinal beams, wherein two adjacent longitudinal beams are hinged, and two adjacent cross beams are hinged;
the transverse beam and the longitudinal beam comprise a hole-filling precast beam (3) and two L-shaped precast beams (2);
the two L-shaped precast beams (2) are correspondingly positioned at two sides of the hole-filling precast beam (3) and are rotationally connected with the hole-filling precast beam (3).
2. The fully prefabricated frame beam with active and passive integrated protection according to claim 1, wherein one end of each L-shaped prefabricated beam (2) is provided with an L-shaped second hinge joint (12);
the two adjacent longitudinal beams and the two adjacent transverse beams are hinged in a matched mode through the second hinge joint (12) of the corresponding L-shaped prefabricated beam (2), and the L-shaped prefabricated beam (2) can vertically rotate around the hinge joint;
a threaded steel rod (6) is arranged on the second hinge joint (12);
The threaded steel rods (6) on the two hinged second joints (12) are connected into a whole through the externally-attached prestressed steel cable (9).
3. The full prefabricated frame beam with active and passive integrated protection according to claim 1, wherein one end of the L-shaped prefabricated beam (2) connected with the hole-filling prefabricated beam (3) is provided with a steel tube concrete column (10);
reserved pore canals (13) which are matched and spliced with the concrete filled steel tube column (10) are respectively arranged at two ends of the hole-wedge precast beam (3);
the steel tube concrete column (10) of the L-shaped precast beam (2) is inserted into a reserved pore canal (13) on the wedge-shaped hole precast beam (3).
4. The all-prefabricated frame beam with active and passive integrated protection according to claim 1, wherein a supporting steel plate (14) is arranged between the upper L-shaped prefabricated beam (2) and the hole-filling prefabricated beam (3) in each longitudinal beam;
the supporting steel plate (14) is inserted into the soil body.
5. The full prefabricated frame beam with the active and passive integrated protection according to claim 4 is characterized in that an avoidance hole is reserved in the center of the supporting steel plate (14), and the avoidance hole is matched with a steel tube concrete column (10) of the L-shaped prefabricated beam (2);
The steel tube concrete column (10) of the L-shaped precast beam (2) passes through an avoidance hole in the center of the supporting steel plate (14) below and is inserted into a reserved hole channel (13) of the hole-filling precast beam (3);
a baffle plate (18) is arranged at the top of one side of the supporting steel plate (14) close to the hole-filling precast beam (3), and the baffle plate (18) is arranged at the top of the hole-filling precast beam (3) and is tightly attached to the hole-filling precast beam (3);
the two sides of the supporting steel plate (14) are respectively sleeved on the corresponding anchor rods (15), the anchor rods (15) are anchored in soil, and the supporting steel plate (14) can move up and down along the anchor rods (15);
the anchor rod (15) is sleeved with a spring (19), and the spring (19) is arranged between the supporting steel plate (14) and a nut at the top of the anchor rod (15).
6. The fully prefabricated frame beam for active and passive integrated protection according to any one of claims 1 to 5, wherein a plurality of cross beams are hinged in sequence to form a transverse portion;
the longitudinal beams are hinged in sequence to form a longitudinal part;
both ends of the transverse part and the longitudinal part are respectively hinged with the corresponding cross-shaped four-hinge piers (1);
an anchor cable hole (4) is formed in the center of each cross-shaped four-hinged pier (1), one end of each prestressed anchor cable is locked through the anchor cable hole (4), and the other end of each prestressed anchor cable is fixed in the soil body;
Each cross-shaped four-hinge pier (1) is provided with an L-shaped first hinge joint (11), the cross-shaped four-hinge piers (1) are hinged with second hinge joints (12) of L-shaped precast beams (2) of the transverse part and the longitudinal part through the first hinge joints (11), and the second hinge joints (12) of the L-shaped precast beams (2) can vertically rotate around hinge joints;
the first hinge joint (11) and the second hinge joint (12) are provided with threaded steel rods (6);
the threaded steel rods (6) on the first hinging head (11) and the second hinging head (12) which are hinged are connected into a whole through an externally-attached prestress steel cable (9);
the ends of the first hinge joint (11) and the second hinge joint (12) are arc-shaped, and angle steel (17) is arranged at the joint gap of the first hinge joint (11) and the second hinge joint (12).
7. The construction method of the all-prefabricated frame beam with active and passive integrated protection according to any one of claims 1 to 6, which is characterized by comprising the following steps:
step S1, cleaning a slope: the construction machinery is adopted to build slopes from top to bottom in a layered manner, each grade of designed slope is excavated in a layered manner, or the same grade of slope is divided into a plurality of sections, excavation and sectional protection are carried out at intervals, when the slope is excavated to the anchor cable position, half of the distance between two adjacent anchor cable holes (4) is continuously excavated downwards along the designed slope, anchor cable drilling equipment is conveniently placed at the position, and then broken stones and residual branches of the slope are cleaned;
Step S2, paving a vegetation blanket: after digging a fixed vegetation blanket ditch, spreading the vegetation blanket, placing the front end of the vegetation blanket into the ditch, filling soil, compacting, fixing the vegetation blanket by using steel bars, spreading the vegetation blanket along a slope, fully contacting the vegetation blanket with the ground through compacting treatment, and fixing the vegetation blanket on the slope;
s3, construction of a prestressed anchor cable: cutting off vegetation carpets at corresponding positions, and performing prestress anchor cable construction at the marked anchor cable holes (4), wherein the construction comprises measuring lofting, pore-forming, cable braiding, anchor cable installation and grouting;
s4, construction of a full prefabricated frame beam with active and passive integrated protection: the method comprises the steps of constructing all prefabricated frame beams with active and passive protection in a grading manner from bottom to top, and constructing a longitudinal part and then a transverse part of each stage of frame beam;
s5, tensioning and locking the prestressed anchor cable: tensioning and locking the slurry of the prestressed anchor cable with the cross-shaped four-hinged pier (1) after the slurry of the prestressed anchor cable reaches the design strength, and determining tensioning and locking modes of the prestressed anchor cable through an on-site tensioning test; the pre-stressed anchor cable is tensioned and locked in stages, after the tensioning is designed, compensation tensioning is carried out for the first time, the pre-stressed anchor cable with the length of 5 cm to 10cm is reserved from the anchor device, the rest part is cut off, and then the pre-stressed anchor cable is locked;
S6, sealing anchors: and filling gaps among the anchor backing plate and the anchor head by using cement paste, and finally sealing the anchor head by adopting concrete with the strength not lower than C25.
8. The method for constructing the fully prefabricated frame beam with active and passive integrated protection according to claim 7, wherein in the step S4, for the vertical portion of each stage of frame beam, the following construction process is performed:
cutting off a vegetation blanket according to the marked positions of anchor cable holes (4), excavating downwards for 30-40 cm to form a foundation grooving (16) for deeply burying a vertical part of a frame beam, excavating a supporting steel plate groove along the vertical direction of the foundation grooving (16), placing a supporting steel plate (14) in the supporting steel plate groove, wherein the depth of the supporting steel plate groove is greater than that of the foundation grooving (16), and then constructing the longitudinal beam of the vertical part:
for each longitudinal beam, a steel tube concrete column (10) of the upper L-shaped precast beam (2) passes through an avoidance hole in the center of a supporting steel plate (14) below the steel tube concrete column to be inserted into the hole-inserted precast beam (3), and the steel tube concrete column (10) of the other L-shaped precast beam (2) is inserted into the upper hole-inserted precast beam (3), so that each L-shaped precast beam (2) is ensured not to slide in a foundation grooving (16) in the construction process;
The method comprises the steps of hinging an uppermost L-shaped precast beam (2) with a cross-shaped four-hinged pier (1) above the uppermost L-shaped precast beam, hinging two adjacent L-shaped precast beams (2), and hinging a lowermost L-shaped precast beam (2) with a cross-shaped four-hinged pier (1) below the lowermost L-shaped precast beam;
an angle iron (17) is arranged at a gap at the top ends of the first articulated head (11) and the second articulated head (12);
a spring (19) is arranged on the anchor rod (15) and the supporting steel plate (14), and the spring (19) is fixed by nuts;
correspondingly tying the hinged cross-shaped four-hinged pier (1) and the L-shaped precast beam (2) or the threaded steel rods (6) of the two hinged L-shaped precast beams (2) by using an externally attached prestress steel cable (9) to form the longitudinal part of the full precast frame beam with active and passive integrated protection;
for the transverse part of each stage of frame beam, the following construction process is carried out:
cutting off a vegetation blanket according to the positions of the marked anchor cable holes (4), and excavating downwards for 30-40 cm to form foundation grooves (16) for deeply burying the transverse parts of each stage of frame beams;
two L-shaped precast beams (2) and a hole-filling precast beam (3) are used as a group of assembled cross beams, and then the assembled cross beams are hoisted into cross beam grooves corresponding to foundation grooves (16) on the supporting surface layer;
Hoisting the cross-shaped four-hinged pier (1) above the corresponding four-hinged pier slot on the foundation slot (16) to hover, enabling the pre-stressed anchor cable to pass through the anchor cable hole (4) on the cross-shaped four-hinged pier (1), releasing the hoisting rope, and placing the cross-shaped four-hinged pier (1) into the four-hinged pier slot;
the method comprises the steps of hinging a first hinging head (11) of a cross four-hinging pier (1) and a second hinging head (12) of an L-shaped precast beam (2) of a cross beam adjacent to the first hinging head, hinging a second hinging head (12) of a corresponding L-shaped precast beam (2) of two adjacent cross beams, and installing angle steel (17) at a gap between the top ends of the first hinging head (11) and the second hinging head (12) to finish the arrangement of the cross beams;
the cross four-hinged pier (1) and the L-shaped precast beams (2) of the adjacent cross beams and the threaded steel rods (6) of the L-shaped precast beams (2) corresponding to the two adjacent cross beams are tied by using an externally attached prestress steel cable (9) to form the transverse part of the full precast frame beam with active and passive integrated protection;
after the foundation slotting (16) is excavated, the dimension and flatness of the foundation slotting (16) are measured, and the condition that the excavated surface is uneven or sundries exist is prevented.
9. The construction method of the full prefabricated frame beam with the active and passive integrated protection according to claim 8, wherein after the L-shaped prefabricated beam (2) of the transverse part of each stage of frame beam is connected with the hole-blocking prefabricated beam (3) through a steel tube concrete column (10), the steel tube concrete column (10) is partially inserted into the hole-blocking prefabricated beam (3), and the part of the steel tube concrete column is exposed out of the hole-blocking prefabricated beam (3);
during excavation of the foundation grooving (16) of the transverse portion of each stage of frame beam:
when the wedge hole prefabrication Liang Kaicao of the cross beam is excavated, the excavation length of the wedge hole prefabrication Liang Kaicao is prolonged, and a space is reserved for the L-shaped prefabrication beam (2) and the wedge hole prefabrication beam (3) to be moved in the repairing process;
prefabricating Liang Kaicao on the transverse beams on the left side and the right side in a hole-filling way, and symmetrically excavating;
the dimensions and flatness measurements of the foundation trench (16) are carried out by placing a lightweight model, which corresponds to the flatness and dimensions of the L-shaped preform (2) and the hole-forming preform (3), into the excavated foundation trench (16).
10. The method for repairing the full prefabricated frame beam with active and passive integrated protection according to any one of claims 1 to 7, which is characterized by comprising the following steps of:
working condition 1: the second joint (12) of the transverse L-shaped precast beam (2) is broken and repaired according to the following operation:
Cutting off the steel tube concrete column (10) on the steel tube concrete column, loosening the high-strength connecting bolts (8) at the hinging points, and taking out the L-shaped precast beam (2) and the steel tube concrete column (10);
dragging the structure on one side of the damaged L-shaped precast beam (2) to a direction away from the damaged L-shaped precast beam (2), leaving a space for repairing the L-shaped precast beam (2), and further inserting the steel tube concrete column (10) of the L-shaped precast beam (2) on the dragged side into a reserved pore canal (13) of the corresponding hole-expanding precast beam (3) in the dragging process;
hoisting a new L-shaped precast beam (2) to a corresponding position, hinging a second hinging head (12) of the new L-shaped precast beam (2) with a corresponding first hinging head (11) or second hinging head (12) by adopting a high-strength connecting bolt (8), and re-pulling and connecting an externally-attached prestress steel cable (9);
the structure of the towed side of the new L-shaped precast beam (2) is pulled back to the original position, so that the steel tube concrete column (10) of the new L-shaped precast beam (2) is inserted into the reserved pore canal (13) of the corresponding hole-filling precast beam (3), and the repair of the L-shaped precast beam (2) is completed;
working condition 2: the transverse hole-blocking precast beam (3) is damaged and repaired according to the following operation:
Drawing the structure on one side of the broken hole-defining precast beam (3) to a direction away from the broken hole-defining precast beam (3) to leave a space for repairing the hole-defining precast beam (3), wherein in the drawing process, the steel tube concrete column (10) of the L-shaped precast beam (2) on the drawing side is further inserted into the reserved pore canal (13) of the corresponding hole-defining precast beam (3); then loosening the high-strength connecting bolt (8) at the hinged position of the L-shaped precast beam (2) at the other side of the hole-expanding precast beam (3), and taking down the damaged hole-expanding precast beam (3) and the rest L-shaped precast beam (2) together;
the new hole-filling precast beam (3) is replaced, the detached L-shaped precast beam (2) and the new hole-filling precast beam (3) are assembled and hoisted, and the structure of the towed side of the new hole-filling precast beam (3) is pulled back to the original position, so that the repair of the hole-filling precast beam (3) is completed;
working condition 3: as no sliding space is reserved for the damage of the components of the vertical part, the damaged L-shaped precast beam (2) and/or the whole section of longitudinal beam where the hole-filling precast beam (3) is positioned can be removed, lifted and repaired, and the new L-shaped precast beam (2) and/or the hole-filling precast beam (3) is replaced and then installed according to the construction method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410004817.XA CN117822613A (en) | 2024-01-03 | 2024-01-03 | Active and passive integrated protection full-prefabricated frame beam and construction and repair method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410004817.XA CN117822613A (en) | 2024-01-03 | 2024-01-03 | Active and passive integrated protection full-prefabricated frame beam and construction and repair method thereof |
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| CN117822613A true CN117822613A (en) | 2024-04-05 |
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|---|---|---|---|
| CN202410004817.XA Pending CN117822613A (en) | 2024-01-03 | 2024-01-03 | Active and passive integrated protection full-prefabricated frame beam and construction and repair method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN117822613A (en) |
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2024
- 2024-01-03 CN CN202410004817.XA patent/CN117822613A/en active Pending
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