CN212200464U - A large-scale prefabricated lattice beam structure for slope reinforcement - Google Patents

Abstract

The utility model discloses a large-scale prefabricated lattice beam structure for side slope reinforcement, which is provided with an inner frame longitudinal beam and a plurality of inner frame transverse beams; the inner frame longitudinal beam and the inner frame transverse beam are orthogonally rigidly connected, and the outer frame transverse beam The longitudinal beams of the outer frame are orthogonally connected at the end to form the outer frame, and a large prefabricated lattice beam is poured and rammed with reinforced concrete in the PC factory to form at one time. The utility model prefabricates a large-scale reinforced concrete lattice beam in a PC component factory, and then uses the large-scale prefabricated lattice beam as a basic assembly unit to safely assemble it in sections along with excavation or filling at the slope construction site, and can be applied to excavation. The reinforcement of the slope can also be applied to the reinforcement of the fill slope; when the design of the excavation slope is steep, it can be excavated and supported from the side of the slope along the slope direction until the reinforcement of the entire slope is completed; after the installation is in place, pour the The concrete in the reserved space of the adjacent large prefabricated lattice beams is rammed to form the superimposed longitudinal beams, and the permanent support of the slope is completed by setting the lattice beam foundation and the crown beam.

Description

A large-scale prefabricated lattice beam structure for slope reinforcement

technical field

The utility model relates to the technical field of civil engineering, in particular to a large-scale prefabricated lattice beam structure for side slope reinforcement.

Background technique

Lattice reinforcement is a kind of slope reinforcement that uses mortar block stone, cast-in-place reinforced concrete or prefabricated prestressed concrete lattice for slope protection, and uses prestressed anchor rods (cables) to fix unstable rock and soil mass. technology. The trellis technology is generally combined with the surrounding landscaping, using the sash to protect the slope, and planting flowers and plants within the sash can achieve extremely beautiful effects. This technology is widely used in the reinforcement of high and steep slopes in mountain highways (or railways), and its slope protection achieves good effects of both beauty and safety.

The main function of the lattice is to distribute the residual sliding force or geotechnical pressure of the slope body to the anchor rods (cables) at the lattice points, and then transmit them to the stable stratum of the slope body through the anchor rods (cables), so as to make the edge of the slope stable. The slope body is in a stable state under the action of the anchoring force provided by the anchor rod (cable). Therefore, as far as the lattice itself is concerned, it is only a force-transmitting structure, and the reinforced slip resistance or geotechnical pressure is mainly provided by the anchor rods (cables) at the lattice points.

At present, in the reinforcement and management of slope engineering, our country mainly adopts mortar block stone and cast-in-place reinforced concrete lattice, which is far behind Japan and developed countries in Europe and the United States with developed construction industry. Due to the small resistance to sliding provided by the mortar block stone, it is generally suitable for the anti-scour treatment of small-scale low and gentle slopes; the cast-in-place reinforced concrete lattice can provide a large resistance to sliding, and the integrity Therefore, it is widely used in various types of slope reinforcement in China, especially in cutting slopes and embankment fillings mainly based on excavation or filling. It is widely used in the reinforcement and management of slopes.

In view of the current domestic commonly used mortar block stone lattice and cast-in-place reinforced concrete lattice, there are the following shortcomings: 1. It takes a long time to maintain, which is not conducive to the early stabilization of the slope, and cannot be used for landslide rescue projects; 2. On-site construction requires more It is not conducive to the realization of rapid installation; ③ the construction site conditions are bad, setting the formwork on the slope and pouring the concrete is prone to unfavorable conditions such as formwork slippage, displacement and concrete leakage that affect the quality of the supporting structure; ④ At present The commonly used lattice forms are usually set on the slope after the excavation or filling of the entire slope is completed. Generally, the construction cannot be carried out in sections with the excavation or filling of the slope, and there are significant safety problems during the slope reinforcement construction; ⑤ Site Vibration of concrete has great disturbance to the slope, and even induces the occurrence of geological disasters such as large-scale landslides.

Utility model content

In order to solve the problems of the prior art, the embodiment of the present invention provides a large-scale prefabricated lattice beam structure for side slope reinforcement. The technical solution is as follows:

In one aspect, a large-scale prefabricated lattice beam structure reinforced by a side slope is provided, and the large-scale prefabricated lattice beam structure reinforced by a side slope is provided with an inner frame longitudinal beam and a plurality of inner frame transverse beams; the inner frame longitudinal beam and the inner frame longitudinal beam are provided. The inner frame beam is orthogonally rigidly connected; the large-scale prefabricated lattice beam structure reinforced by the side slope is also provided with an outer frame beam and an outer frame longitudinal beam, and the outer frame beam and the outer frame longitudinal beam are orthogonally rigidly connected at the head and tail to form an outer frame ; A large-scale prefabricated lattice beam structure reinforced by the slope is formed by pouring and ramming reinforced concrete in the PC factory.

Further, the large-scale prefabricated lattice beam structure reinforced by the side slope is a reinforced concrete frame beam unit.

Further, the large-scale prefabricated lattice beam structure reinforced by the side slope is a frame beam unit of equal thickness or a frame beam unit of unequal thickness.

Further, the large-scale prefabricated lattice beam structure reinforced by the slope is provided with double-layer two-way stress-bearing main bars within the beam body, and HRB400, HRB500, HRBF400, and HRBF500 steel bars should be used for the stress-bearing main bars.

Further, the strength grade of concrete used in the large-scale prefabricated lattice beam structure reinforced by the side slope is not less than C30.

Further, the shape of the large-scale prefabricated lattice beam structure reinforced by the side slope is a rectangle.

Further, a reserved anchor hole is provided at the intersection of the inner frame beam and the inner frame longitudinal beam; the reserved anchor hole is used for the outer anchor section of the prestressed anchor rod to pass through.

Further, the side surfaces of the outer frame longitudinal beams are provided with annular reinforcing bars, and the annular reinforcing bars are staggered on the sides of the opposite outer frame beams. 20cm long.

Further, the double-layer stress-bearing steel bars are exposed inside and outside the range of the side longitudinal beams of the outer frame beam, and the double-layer stress-bearing steel bars are exposed on the side surface of the outer frame beam and are used for anchoring into the lattice beam foundation and the crown beam.

Further, the exposed length of the double-layer stressed steel bars is 50cm-80cm.

The beneficial effects brought by the technical solutions provided by the embodiments of the present utility model are:

The utility model provides a large-scale prefabricated lattice beam structure reinforced by a side slope. A large-scale reinforced concrete lattice beam is prefabricated in a PC component factory, and then the large-scale prefabricated lattice beam is used as a basic assembly unit for construction on the side slope. It can be safely assembled in sections with excavation or filling on site, which can be applied to both the reinforcement and treatment of excavation slopes and the reinforcement and treatment of fill slopes; when the design slope of the excavation slope is steep, it can be used from one side of the side slope along the edge. The slope direction is excavated and supported until the reinforcement of the entire slope is completed; after the installation is in place, the concrete in the reserved space of the adjacent large prefabricated lattice beams is poured to form a superimposed longitudinal beam, and the lattice beam foundation and crown beam are set to complete the slope reinforcement. Permanent support. Therefore, the utility model patent is beneficial to realize fast and safe assembly and construction of lattice beam slope reinforcement, and is a large-scale prefabricated lattice beam structure worthy of promotion.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is a three-dimensional schematic diagram of a large-scale prefabricated lattice beam structure reinforced by a side slope according to an embodiment of the present utility model;

2 is a schematic plan view of a large-scale prefabricated lattice beam structure reinforced with a side slope according to an embodiment of the present utility model;

3 is a schematic diagram of a large-scale prefabricated lattice beam anchorage system according to an embodiment of the present invention;

4 is a schematic diagram of a cross-sectional view of a post-casting laminated longitudinal beam according to an embodiment of the present invention;

Fig. 5 is a front elevation view of a large prefabricated lattice structure reinforcing a primary side slope according to an embodiment of the present invention.

Among them, 1 inner frame beam, 2 inner frame longitudinal beam, 3 outer frame beam, 4 outer frame longitudinal beam, 5 reserved anchor holes, 6 annular steel bars, 7 stressed main bars, 8 prestressed anchor rods (cables), 9 buckles Composite steel bars, 10 post-cast composite longitudinal beams, 11 lattice beam foundations, 12 crown beams, and 13 sealing anchors.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present utility model more clear, the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

The utility model provides a large-scale prefabricated lattice beam structure for side slope reinforcement, which is provided with an inner frame longitudinal beam 2 and a plurality of inner frame transverse beams 1, and the inner frame longitudinal beam 2 and the inner frame transverse beam 1 are rigidly connected orthogonally; The large-scale prefabricated lattice beam structure reinforced by the slope is also provided with an outer frame beam 3 and an outer frame longitudinal beam 4; Pouring and ramming reinforced concrete in PC factory for one-time molding. As shown in Figure 1, a large-scale prefabricated lattice beam structure is provided with three inner frame beams.

The large-scale prefabricated lattice beam structure is a reinforced concrete frame beam unit.

The large-scale prefabricated lattice beam structure may be a frame beam unit of equal thickness or a frame beam unit of unequal thickness, and the inner frame beam may be partially thickened on the side of the upper deck surface of the beam unit with an unequal thickness.

The large-scale prefabricated lattice beams are provided with double-layer two-way stress-bearing main bars within the beam body, and HRB400, HRB500, HRBF400, and HRBF500 steel bars should be used for the stress-bearing main bars.

The strength grade of concrete used in the prefabricated lattice beam structure should not be less than C30.

The shape of the outer frame of the large-scale prefabricated lattice beam structure is a rectangle, and its plane size is shown in Figure 2, and its corresponding size standard is recommended in Table 1 for the convenience of standardized production in PC factories;

Table 1 Standardized dimensions of large prefabricated lattice beams (recommended)

model The distance between two adjacent reserved anchor holes l Sectional dimension of inner frame longitudinal beam (B×H) Outer frame longitudinal beam section size (b×h) Model A 1.5m 300mm×300mm 100mm×300mm Model B 2.0m 350mm×350mm 100mm×350mm Model C 2.5m 400mm×400mm 150mm×400mm Model D 3.0m 450mm×450mm 150mm×450mm

The prefabricated lattice beam structure includes an inner frame beam 1, an inner frame longitudinal beam 2, an outer frame beam 3, an outer frame longitudinal beam 4, an inner frame beam 1 and an inner frame longitudinal beam 2. The intersections are provided with reserved anchor holes 5 for use. The outer anchor section of the prestressed anchor rod (cable) passes through, and the inclination angle of the reserved anchor hole 5 should be determined according to the inclination angle of the prestressed anchor rod (cable) actually applied on the specific slope site. It is advisable to pass the outer anchor section of the prestressed anchor rod (cable) without hindering it, and it is generally controlled at about 50mm. When a certain slope does not need to be provided with prestressed anchor rods (cables), the prefabricated lattice beams may not be provided with the reserved anchor holes 5 .

The side of the outer frame longitudinal beam 4 is provided with annular reinforcement bars 6, and the annular reinforcement bars 6 are arranged in a staggered manner on the side of the outer frame beam on the opposite side. 15cm long.

The large-scale prefabricated lattice beam outer frame beam 3 side longitudinal beams have exposed double-layer stress steel bars 7 inside and outside. During the overall construction, it can be anchored into the lattice beam foundation and crown beam.

A large-scale prefabricated lattice beam structure reinforced with slope, the overall construction process of its assembly is introduced in detail by taking the excavation slope as an example. Before construction on site, the side slope should be divided into several grades according to the height of the side slope, and then the side slope should be excavated and supported according to the pre-defined grades. This embodiment only introduces the overall installation process of the large-scale prefabricated lattice beams on the first-level slope.

The specific assembly and overall construction steps of the large-scale prefabricated lattice beams on the first-level slope are as follows:

Step 1: Excavate the rock and soil mass of the slope and trim the slope surface. Large-scale prefabricated lattice beams can be directly set on the relatively flat slope surface after trimming. If necessary, the vertical and horizontal beam positions on the slope can be pre-set and grooves can be carved down on the vertical slope surface to set the large-scale prefabricated lattice beams at a certain depth on the slope surface. in the groove;

Step 2: Install the prestressed anchor rod (cable) to be strong. According to the pre-determined hole position and predetermined angle of the construction drawing, the hole is dry-drilled with a drilling rig. After the high-pressure air gun clears the hole, install the prestressed anchor rod (cable) 8 and grouting to be strong. It is not advisable to touch the exposed section of the anchor rod (cable) at will;

Step 3: The large prefabricated lattice beams are hoisted into place. Use lifting equipment to hoist the large prefabricated lattice beam to the predetermined position, pay attention to the accurate placement of the large prefabricated lattice beam when hoisting, and pass the outer anchor section of the prestressed anchor rod (cable) 8 through the large prefabricated lattice beam. Reserve anchor holes 5 at the intersection of the longitudinal and transverse beams of the inner frame of the component, and take temporary stabilization measures for the large prefabricated lattice beams to prevent the large prefabricated lattice beams from tipping or slipping; see Figure 3.

Step 4: Tension and lock the prestressed anchor rod (cable). Gradually tension the prestressed anchor rod (cable) 8 passing through the anchor hole 5 in the center of the large prefabricated lattice beam to a predetermined value and then lock it. After tensioning and locking, all large The prefabricated lattice beams should be basically kept in the same plane. Note that several prestressed anchors (cables) on the same large prefabricated lattice beam should be tensioned and locked at the same level.

Step 5: Flexible connection of adjacent large prefabricated lattice beams. Insert the four inner corners of the "mouth-shaped" stirrups formed by the exposed ring reinforcement 6 on the side of the adjacent large prefabricated lattice beam into the buckle reinforcement 9, and use the buckle reinforcement 9 with the ring reinforcement 6 on the side of the outer frame longitudinal beam. The wires are tied up in preparation for the ramming of the post-cast composite stringer 10 concrete; see Figure 4. Note that the length of the buckle reinforcement should also be exposed on the side of the outer frame beam by about 0.5m so that the buckle reinforcement can be anchored into the lattice beam foundation and crown beam.

Step 6: Cast-in-place concrete construction of lattice beam foundation. Excavate the foundation groove of the lattice beam foundation at the slope angle of the slope, set up the lattice beam foundation 11 reinforcement cage, and anchor the exposed main reinforcement 7 and the buckle reinforcement 9 on the side of the outer frame beam at the bottom of the large prefabricated lattice beam slope. Enter the steel cage of the lattice beam foundation and pour the concrete of the lattice beam foundation 11 in time;

Step 7: Concrete construction of support structure crown beams and longitudinal superimposed longitudinal beams. Anchor the exposed main reinforcement bars 7 and buckle reinforcement bars 9 on the side of the outer frame beam on the top of the large prefabricated lattice beam into the crown beam reinforcement cage, and then pour and ram the superposed longitudinal beam 10 concrete and the crown beam 12 concrete in the order from bottom to top.

Step 8: Other auxiliary work. Cut off the excess part of the outer anchor section of the prestressed anchor rod (cable) on the large prefabricated lattice girder with a cutting machine and apply the sealing anchor 13 at the outer anchor head; see Figure 5.

Based on the convenience of construction and safety considerations, the sequence of the above steps can be appropriately adjusted. When the large-scale prefabricated lattice beam is installed on the slope and prestressed with anchor rods (cables), the temporary stabilization measures of the large-scale prefabricated lattice should be taken during the excavation of the foundation groove of the lower lattice beam foundation to prevent the lower part of the suspended state. Large prefabricated lattice beams slide down the slope.

The beneficial effects brought by the technical solutions provided by the embodiments of the present utility model are:

The utility model has the following advantages of a large-scale prefabricated lattice beam structure reinforced with slopes: (1) The large-scale prefabricated lattice has a compact and concise shape, can be produced in batches in a PC factory, and has high efficiency, guaranteed quality, energy saving and reduced energy consumption. It is beneficial to reduce environmental pollution; ② the large-scale prefabricated lattice beam is a closed structure, and the integrity is relatively good, which is convenient for mass production, stacking, handling and hoisting of components, and the structural components have good crack resistance; ③ construction site installation process It is simple and easy to operate. After the prefabricated components are installed in place, the prestressed anchors (cables) can be tensioned and locked immediately, which is conducive to the early stabilization of the slope; ④ The prefabricated structure has a large primary support slope surface area, which can reduce labor and crossover The operation is convenient, the installation progress is accelerated, and the construction is basically not affected by the weather; ⑤ The site saves a lot of labor and reduces the amount of formwork, the installation accuracy is high, and the construction quality is guaranteed; ⑥ The construction site is assembled quickly as a whole, and the entire slope (or grade one After the assembly of all prefabricated components within the range of slope) is completed, each prefabricated component is connected by post-cast concrete composite longitudinal beams, lattice beam foundations and slope top crown beams, which is structurally safe and reliable, and can be applied with prestressed anchors (cables). It is widely used in the reinforcement and treatment of excavation slopes or fill slopes of various types, scales and heights, and is especially suitable for emergency and disaster relief and landslide treatment projects with urgent time requirements; ⑦ Prestressed anchors (cable cables) ) Before the tension and locking, the adjacent lattice beams are in a flexible connection or unconnected state, so it can adapt to a certain degree of slope unevenness; It is in harmony with the surrounding environment and is conducive to environmental protection.

Therefore, the utility model can reduce energy consumption, reduce environmental pollution, save a lot of money, and shorten the construction period in the reinforcement and treatment of various types and different heights of excavation slopes or filling slopes, and is especially suitable for those who have urgent requirements for time. The landslide control project for emergency rescue and disaster relief is a large-scale prefabricated lattice beam structure worthy of promotion.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

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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