CN212200464U - Large prefabricated lattice beam structure for slope reinforcement - Google Patents
Large prefabricated lattice beam structure for slope reinforcement Download PDFInfo
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- CN212200464U CN212200464U CN202020650273.1U CN202020650273U CN212200464U CN 212200464 U CN212200464 U CN 212200464U CN 202020650273 U CN202020650273 U CN 202020650273U CN 212200464 U CN212200464 U CN 212200464U
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Abstract
The utility model discloses a large prefabricated lattice beam structure for slope reinforcement, which is provided with an inner frame longitudinal beam and a plurality of inner frame cross beams; the inner frame longitudinal beam and the inner frame cross beam are orthogonally and rigidly connected, the arranged outer frame cross beam and the outer frame longitudinal beam are orthogonally and rigidly connected end to form an outer frame, and a large prefabricated lattice beam is cast and stamped in a PC factory to form reinforced concrete once. The utility model discloses a prefabricate a large-scale reinforced concrete lattice beam in PC component factory, then use large-scale prefabricated lattice beam as basic assembly unit and assemble along with excavation or filling segmentation safety at the side slope job site, can be applied to the reinforcement and control of excavation side slope and can be applied to the reinforcement and control of filling side slope; when the design slope of the excavation side slope is steeper, the excavation and support can be carried out along the direction of the side slope from one side of the side slope until the whole side slope is reinforced; and after the prefabricated lattice beam is installed in place, pouring and tamping concrete in the reserved space of the adjacent large prefabricated lattice beams to form a superposed longitudinal beam, and finishing permanent support of the side slope by arranging the lattice beam foundation and the crown beam.
Description
Technical Field
The utility model belongs to the technical field of the civil engineering technique and specifically relates to, in particular to side slope reinforcement's large-scale prefabricated lattice beam structure.
Background
The lattice reinforcement is a slope reinforcement technology which utilizes grouted rock blocks, cast-in-place reinforced concrete or prefabricated prestressed concrete lattices to protect slope surfaces and utilizes prestressed anchor rods (cables) to fix unstable rock-soil bodies. The lattice technology is generally combined with the beautification of the surrounding environment, the sash is used for protecting the slope, and meanwhile, the effect of extremely beautiful appearance can be achieved by planting flowers and plants in the sash. The technology is widely used for reinforcing the high and steep side slopes in the highways (or railways) in mountain areas, and the slope protection of the technology achieves good effects of attractiveness and safety.
The lattice structure has the main function of distributing the residual gliding force or rock-soil pressure of the slope body to the anchor rods (cables) at lattice structure points and then transmitting the residual gliding force or rock-soil pressure to the slope body stable stratum through the anchor rods (cables), so that the slope body of the slope is in a stable state under the action of the anchoring force provided by the anchor rods (cables). The lattice itself is therefore only a force-transmitting structure, and the anti-slip or geotechnical pressure of the reinforcement is provided primarily by the anchor rods (cables) at the lattice structure points.
At present, grouted blockstones and cast-in-place reinforced concrete lattices are mainly adopted in slope engineering reinforcement treatment in China, and the method is far behind developed Japan and developed countries in Europe and America in the construction industry. The grout blocks are generally suitable for the scour prevention treatment of small-scale low and gentle slopes due to the small skid resistance provided by the grout blocks; the cast-in-place reinforced concrete lattice can provide larger slip resistance, has better integrity and can better cooperate with the prestressed anchor rods (cables) to bear force, so the cast-in-place reinforced concrete lattice is widely applied to various types of domestic slope reinforcement, and is particularly widely applied to the reinforcement treatment of cutting slopes and embankment filling slopes which mainly adopt excavation or filling.
In view of the defects of the prior commonly used grouted blockstone lattice and cast-in-place reinforced concrete lattice: the method needs long-time maintenance, is not beneficial to the early stabilization of the side slope and cannot be used for landslide emergency engineering; secondly, more templates and constructors are needed for field construction, and quick installation is not facilitated; the construction site conditions are severe, the templates are arranged on the slope, and adverse conditions such as template gliding, displacement, concrete leakage and the like which affect the quality of the supporting structure easily occur when the concrete is poured and tamped; the prior commonly used lattice form is usually arranged on the slope surface after the excavation or filling of the whole slope surface is finished, the construction can not be performed along with the excavation or filling of the slope body in a segmented manner, and the safety problem during the slope reinforcement construction is obvious; the vibration of the concrete on site greatly disturbs the side slope, and even induces the occurrence of geological disasters such as large-scale landslide and the like.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of the prior art, the embodiment of the utility model provides a reinforced (rfd) large-scale prefabricated lattice beam structure of side slope. The technical scheme is as follows:
on one hand, the large prefabricated lattice beam structure for slope reinforcement is provided with an inner frame longitudinal beam and a plurality of inner frame cross beams; the inner frame longitudinal beam and the inner frame cross beam are orthogonally and rigidly connected; the slope-reinforced large prefabricated lattice beam structure is also provided with an outer frame cross beam and an outer frame longitudinal beam, and the outer frame cross beam and the outer frame longitudinal beam are orthogonally connected end to form an external frame; and casting and tamping reinforced concrete one-step molding on the large prefabricated lattice beam structure for slope reinforcement in a PC (personal computer) factory.
Furthermore, the large prefabricated lattice beam structure for slope reinforcement is a reinforced concrete frame beam unit.
Furthermore, the slope-reinforced large prefabricated lattice beam structure is a frame beam unit with equal thickness or a frame beam unit with unequal thickness, and the inner frame beam is locally thickened on one side of the upper plate surface of the beam unit with unequal thickness.
Furthermore, the large prefabricated lattice beam structure for slope reinforcement is provided with double layers of bidirectional stressed main reinforcements within the beam body range, and the stressed main reinforcements are preferably HRB400, HRB500, HRBF400 and HRBF500 reinforcements.
Further, the slope-reinforced large prefabricated lattice beam structure has the concrete strength grade not less than C30.
Further, the large prefabricated lattice beam structure for slope reinforcement is rectangular in shape.
Furthermore, a reserved anchor hole is formed in the intersection of the inner frame cross beam and the inner frame longitudinal beam; and the reserved anchor hole is used for the penetration of an outer anchor section of the prestressed anchor rod.
Furthermore, annular reinforcing steel bars are arranged on the side faces of the outer frame longitudinal beams, the annular reinforcing steel bars are arranged on the side faces of the outer frame beams in a staggered mode, the distance between the exposed annular reinforcing steel bars on the same side face is 10-20cm, and the exposed annular reinforcing steel bars on the same side face are 15-20 cm long.
Furthermore, double-layer stressed steel bars are exposed in the range of the longitudinal beam on the side surface of the outer frame cross beam, exposed on the side surface of the outer frame cross beam and used for being anchored into the lattice beam foundation and the crown beam.
Furthermore, the exposed length of the double-layer stressed steel bar is 50cm-80 cm.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is:
the utility model provides a large prefabricated lattice beam structure for slope reinforcement, which is characterized in that a large reinforced concrete lattice beam is prefabricated in a PC component factory, and then the large prefabricated lattice beam is taken as a basic assembly unit to be safely assembled along with excavation or filling segmentation on a slope construction site, so that the large prefabricated lattice beam structure can be applied to reinforcement treatment of excavation slopes and reinforcement treatment of filling slopes; when the design slope of the excavation side slope is steeper, the excavation and support can be carried out along the direction of the side slope from one side of the side slope until the whole side slope is reinforced; and after the prefabricated lattice beam is installed in place, pouring and tamping concrete in the reserved space of the adjacent large prefabricated lattice beams to form a superposed longitudinal beam, and finishing permanent support of the side slope by arranging the lattice beam foundation and the crown beam. Therefore the utility model discloses a be favorable to realizing the quick safety assembly construction of lattice beam side slope reinforcement, be a large-scale prefabricated lattice beam structure worth promoting.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic perspective view of a large prefabricated lattice beam structure for slope reinforcement according to an embodiment of the present invention;
fig. 2 is a schematic plan view of a slope-reinforced large prefabricated lattice beam structure according to an embodiment of the present invention;
fig. 3 is a schematic view of a large sheet of prefabricated lattice beam anchoring system according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of a cross-sectional view of a post-cast overlapping stringer of an embodiment of the present invention;
fig. 5 is a front elevation view of a large prefabricated lattice reinforced one-level slope of the embodiment of the present invention.
The steel plate comprises an inner frame cross beam 1, an inner frame longitudinal beam 2, an outer frame cross beam 3, an outer frame longitudinal beam 4, a reserved anchor hole 5, an annular reinforcing steel bar 6, a stressed main reinforcing steel bar 7, a prestressed anchor rod (cable) 8, a buckling reinforcing steel bar 9, a post-cast superposed longitudinal beam 10, a lattice beam foundation 11, a crown beam 12 and a seal anchor 13.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The utility model provides a large prefabricated lattice beam structure for slope reinforcement, which is provided with an inner frame longitudinal beam 2 and a plurality of inner frame cross beams 1, wherein the inner frame longitudinal beam 2 and the inner frame cross beams 1 are orthogonally and rigidly connected; the large prefabricated lattice beam structure for slope reinforcement is also provided with an outer frame cross beam 3 and an outer frame longitudinal beam 4; the outer frame cross beams 3 and the outer frame longitudinal beams 4 are orthogonally connected end to form an outer frame, and a large prefabricated lattice beam is cast and stamped in a PC factory to form reinforced concrete once. A large prefabricated lattice beam structure provided with three inner frame beams is shown in fig. 1.
The large prefabricated lattice beam structure is a reinforced concrete frame beam unit.
The large prefabricated lattice beam structure can be a frame beam unit with equal thickness or a frame beam unit with unequal thickness, and the inner frame beam can be locally thickened on one side of the upper plate surface of the beam unit with unequal thickness.
The large prefabricated lattice beam is provided with double layers of bidirectional stressed main reinforcements within the range of the beam body, and the stressed main reinforcements are preferably HRB400, HRB500, HRBF400 and HRBF500 reinforcing steel bars.
The strength grade of the concrete used by the prefabricated lattice beam structure is not smaller than C30.
The outer frame of the large prefabricated lattice beam structure is rectangular, the plane size of the outer frame is shown in figure 2, and the corresponding size standard recommended for the standardized production in a PC factory is shown in table 1;
TABLE 1 standardized dimensions for large prefabricated lattice beams (recommendations)
| Model number | Spacing l between two adjacent reserved anchor holes | Inner frame cross beam section size (B X H) | Cross-sectional dimension of outer frame longitudinal and transverse beams (b x h) |
| Type A | 1.5m | 300mm×300mm | 100mm×300mm |
| Type B | 2.0m | 350mm×350mm | 100mm×350mm |
| Type C | 2.5m | 400mm×400mm | 150mm×400mm |
| Type D | 3.0m | 450mm×450mm | 150mm×450mm |
The prefabricated lattice beam structure comprises an inner frame cross beam 1, an inner frame longitudinal beam 2, an outer frame cross beam 3, an outer frame longitudinal beam 4, a reserved anchor hole 5 arranged at the junction of the inner frame cross beam 1 and the inner frame longitudinal beam 2 and used for passing through an outer anchor section of a prestressed anchor rod (cable), the inclination angle of the reserved anchor hole 5 is determined according to the inclination angle of the prestressed anchor rod (cable) actually applied on a concrete slope site, the diameter of the reserved anchor hole 5 is suitable for not hindering the passing through of the outer anchor section of the prestressed anchor rod (cable), and the general control is about 50 mm. When the prestressed anchor rods (cables) do not need to be arranged particularly on a slope, the prefabricated lattice girder may not be provided with the reserved anchor holes 5.
The side face of the outer frame longitudinal beam 4 is provided with annular reinforcing steel bars 6, the annular reinforcing steel bars 6 are arranged on the side faces of the outer frame beam on opposite sides in a staggered mode, the distance between the exposed annular reinforcing steel bars on the same side face is 10-20cm, and the exposed annular reinforcing steel bars on the same side face are about 15cm long.
Double-layer stressed steel bars 7 are exposed in the range of the longitudinal beam on the side surface of the outer frame cross beam 3 of the large prefabricated lattice beam, the double-layer stressed steel bars 7 are exposed out of the side surface of the outer frame cross beam 3, the exposed length is about 50cm, and the double-layer stressed steel bars are conveniently anchored into a lattice beam foundation and a crown beam during the whole assembly construction.
A large prefabricated lattice beam structure for reinforcing a side slope is disclosed, and the construction process of the whole assembly of the large prefabricated lattice beam structure is described in detail by taking a square side slope as an example. Before the site construction, the side slope is divided into a plurality of levels according to the height of the side slope, and then the side slope is excavated and supported according to the preset levels. The embodiment only describes the whole assembly process of the large prefabricated lattice beam of the first-level slope.
The construction steps of the integral assembly construction of the large-scale prefabricated lattice beam of the first-level side slope are as follows:
the method comprises the following steps: excavating slope rock-soil mass and finishing slope surface. The large prefabricated lattice beams can be directly arranged on the relatively flat slope surface of the trimmed side slope, and can be arranged in grooves with certain depth on the slope surface by notching grooves downwards at the vertical slope surface at the preset longitudinal and transverse beam positions on the slope surface if necessary;
step two: the installation of the prestressed anchor rod (cable) is to be strengthened. Adopting a drilling machine to carry out dry drilling to form a hole according to a preset hole position and a preset angle of a construction drawing, installing a prestressed anchor rod (cable) 8 after cleaning the hole by a high-pressure air gun for grouting to be strong, and paying attention to the anchor rod (cable) exposed section at will during the grouting to be strong of the prestressed anchor rod (cable) 8;
step three: and hoisting the large prefabricated lattice beam in place. Hoisting the large prefabricated lattice beam to a preset position by using hoisting equipment, paying attention to the fact that the placement position of the large prefabricated lattice beam is accurate when the large prefabricated lattice beam is hoisted, enabling an outer anchor section of a constructed prestressed anchor rod (cable) 8 to penetrate through a reserved anchor hole 5 at the intersection of a longitudinal beam and a transverse beam of an inner frame of the large prefabricated part, and making a temporary stabilizing measure of the large prefabricated lattice beam to prevent the large prefabricated lattice beam from toppling or sliding; see fig. 3.
Step four: and (4) tensioning and locking the prestressed anchor rod (cable). And (3) gradually tensioning the prestressed anchor rods (cables) 8 which penetrate through the reserved anchor holes 5 in the centers of the large prefabricated lattice girders by using a hydraulic jack in a grading manner to a preset value, and then locking, wherein all the large prefabricated lattice girders on the slope surface of the same grade after being tensioned and locked are basically kept on the same plane. Note that a plurality of prestressed anchor rods (cables) on the same large prefabricated lattice beam are suitable for simultaneous tension locking of loads in the same level.
Step five: and flexibly connecting adjacent large prefabricated lattice beams. Inserting four inner corners of a square stirrup formed by buckling exposed annular reinforcing steel bars 6 on the side surfaces of adjacent large prefabricated lattice beams into buckling reinforcing steel bars 9, and binding the buckling reinforcing steel bars 9 and the annular reinforcing steel bars 6 on the side surfaces of the outer frame longitudinal beams by using steel wires to prepare for casting and tamping of post-cast superposed longitudinal beam 10 concrete; see fig. 4. Note that the length of the buckling reinforcing steel bars is also exposed to about 0.5m of the side surface of the outer frame cross beam so that the buckling reinforcing steel bars can be anchored into the lattice beam foundation and the crown beam.
Step six: and (5) carrying out cast-in-place concrete construction on the lattice beam foundation. Excavating a foundation trench of the lattice beam foundation at the slope corner of the side slope, arranging a reinforcement cage of the lattice beam foundation 11, anchoring a stressed main rib 7 and a buckling reinforcement 9 exposed on the side surface of an outer frame cross beam at the bottom of the large prefabricated lattice beam slope into the reinforcement cage of the lattice beam foundation, and pouring concrete of the lattice beam foundation 11 in time;
step seven: and (5) carrying out concrete construction on the supporting structure crown beam and the longitudinal superposed longitudinal beam. And anchoring the stressed main reinforcements 7 and the buckling reinforcements 9 exposed on the side surfaces of the outer frame cross beams at the top of the large prefabricated lattice beam into the top beam reinforcement cage, and pouring and tamping the superposed longitudinal beam 10 concrete and the top beam 12 concrete in a descending order.
Step eight: and (4) other auxiliary operations. Cutting off the redundant part of the external anchor section of the prestressed anchor rod (cable) on the large prefabricated lattice beam by using a cutting machine and applying the cut-off anchor 13 at the external anchor head; see fig. 5.
Based on construction convenience and safety consideration, the sequence of the steps can be properly adjusted. After the large prefabricated lattice beam is installed on a slope surface and the prestress of an anchor rod (cable) is applied, a temporary stabilizing measure of the large prefabricated lattice should be made when a foundation trench of a lattice beam foundation on the lower portion of the large prefabricated lattice beam is excavated, and the large prefabricated lattice beam slides downwards along the slope surface when the lower portion is prevented from being suspended.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is:
the utility model relates to a reinforced (rfd) large-scale prefabricated lattice beam structure of side slope its advantage has following several points: firstly, the large prefabricated lattice is compact and simple in appearance, can be produced in a batch standard manner in a PC factory, is high in efficiency, ensures the quality, saves energy, reduces emission and is beneficial to reducing environmental pollution; secondly, the large prefabricated lattice beam is of a closed structure, the integrity is good, the mass production, stacking, carrying and hoisting of the structural members are facilitated, and the crack resistance of the structural members is good; the installation procedure of the construction site is simple and convenient to operate, and the prefabricated part can be immediately tensioned and locked to the prestressed anchor rod (cable) after being installed in place, so that the slope can be stabilized early; fourthly, the slope surface area of the prefabricated structure for one-time supporting is large, so that the labor force can be reduced, the cross operation is convenient, the installation progress is accelerated, and the construction is basically not influenced by the weather; a large amount of labor force is saved on site, the using amount of the template is reduced, the installation precision is high, and the construction quality is ensured; the construction site is integrally and quickly assembled, all prefabricated parts in the whole side slope (or primary side slope) range are connected with each prefabricated part through the post-cast concrete superposed longitudinal beam, the lattice beam foundation and the slope top crown beam after the assembly is finished, the structure is safe and reliable, the prestress anchor rod (cable) is matched, the reinforcement and the management of excavation side slopes or filling side slopes of various types, various scales and different heights can be realized, the applicability is wide, and the prestress anchor rod (cable) is particularly suitable for emergency rescue and disaster relief landslide management engineering with urgent time requirements; seventhly, before the prestressed anchor rod (cable) is tensioned and locked, the adjacent lattice beams are in a flexible connection state or an unconnected state, so that the prestressed anchor rod (cable) can adapt to the unevenness of the slope to a certain degree; and planting grass and planting small shrubs in the finished lattice beam frame is beneficial to coordination with the surrounding environment and environmental protection.
Therefore the utility model discloses can reduce the energy consumption, reduce environmental pollution, save a large amount of funds, shorten time limit in the excavation side slope or fill side slope engineering reinforcement treatment of various types and co-altitude, the specially adapted has the emergency rescue and relief landslide improvement engineering of urgent requirement to the time, is a large-scale prefabricated lattice beam structure worth promoting.
The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A large prefabricated lattice beam structure for slope reinforcement is characterized in that the large prefabricated lattice beam structure for slope reinforcement is provided with an inner frame longitudinal beam and a plurality of inner frame cross beams; the inner frame longitudinal beam and the inner frame cross beam are orthogonally and rigidly connected; the slope-reinforced large prefabricated lattice beam structure is also provided with an outer frame cross beam and an outer frame longitudinal beam, and the outer frame cross beam and the outer frame longitudinal beam are orthogonally connected end to form an external frame; and casting and tamping reinforced concrete one-step molding on the large prefabricated lattice beam structure for slope reinforcement in a PC (personal computer) factory.
2. The slope-reinforced large prefabricated lattice beam structure according to claim 1, wherein the slope-reinforced large prefabricated lattice beam structure is a reinforced concrete frame beam unit.
3. The slope-reinforced large prefabricated lattice beam structure of claim 2, wherein the slope-reinforced large prefabricated lattice beam structure is a frame beam unit of an equal thickness or a frame beam unit of an unequal thickness, and the inner frame beam is locally thickened at one side of an upper plate surface of the beam unit.
4. The slope-reinforced large prefabricated lattice beam structure as claimed in claim 3, wherein the slope-reinforced large prefabricated lattice beam structure is provided with double layers of bidirectional stressed main bars within the beam body, and the stressed main bars are preferably HRB400, HRB500, HRBF400 or HRBF500 steel bars.
5. The slope-reinforced large precast lattice beam structure of claim 4, wherein the slope-reinforced large precast lattice beam structure uses a concrete strength grade of not less than C30.
6. The slope-reinforced large prefabricated lattice beam structure according to claim 5, wherein said slope-reinforced large prefabricated lattice beam structure has a rectangular shape.
7. The slope-reinforced large prefabricated lattice beam structure according to claim 6, wherein a reserved anchor hole is formed at the intersection of the inner frame cross beam and the inner frame longitudinal beam; and the reserved anchor hole is used for the penetration of an outer anchor section of the prestressed anchor rod.
8. The slope-reinforced large prefabricated lattice beam structure as claimed in claim 7, wherein the outer frame longitudinal beams are provided at the sides thereof with ring-shaped reinforcing bars, the ring-shaped reinforcing bars are staggered at the opposite sides of the outer frame longitudinal beams, and the exposed ring-shaped reinforcing bars at the same side have a spacing of 10-20cm and are exposed at the sides of the outer frame longitudinal beams for 15-20 cm.
9. The slope-reinforced large prefabricated lattice beam structure according to claim 8, wherein double-layer stressed steel bars are exposed outside the side longitudinal beams of the outer frame cross beams, exposed out of the side surfaces of the outer frame cross beams and used for anchoring into the lattice beam foundation and the crown beam.
10. The slope-reinforced large prefabricated lattice beam structure of claim 9, wherein the exposed length of the double-layer stressed steel bars is 50cm-80 cm.
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| CN202020650273.1U CN212200464U (en) | 2020-04-26 | 2020-04-26 | Large prefabricated lattice beam structure for slope reinforcement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914333A (en) * | 2021-09-29 | 2022-01-11 | 中国一冶集团有限公司 | Slope protection monomer component, slope protection structure and slope protection construction method |
| CN115506378A (en) * | 2022-09-28 | 2022-12-23 | 中国一冶集团有限公司 | Anchor rod frame beam template system and construction method thereof |
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2020
- 2020-04-26 CN CN202020650273.1U patent/CN212200464U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914333A (en) * | 2021-09-29 | 2022-01-11 | 中国一冶集团有限公司 | Slope protection monomer component, slope protection structure and slope protection construction method |
| CN115506378A (en) * | 2022-09-28 | 2022-12-23 | 中国一冶集团有限公司 | Anchor rod frame beam template system and construction method thereof |
| CN115506378B (en) * | 2022-09-28 | 2023-08-29 | 中国一冶集团有限公司 | Anchor rod frame beam template system and construction method thereof |
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