High-filling deep-excavation roadbed frame beam implementation structure

Abstract

The utility model discloses a high-filling deep-excavation roadbed frame beam implementation structure which comprises a frame beam composed of a frame cross beam and a frame vertical beam, the frame beam forms a plurality of cells, and each cell is fixed through a group of pre-stressed anchor cables. The pre-stressed anchor cable comprises a 15-4 type anchorage device, the anchorage device corresponds to the interior of a phi 90 PVC embedded pipe, the length of the embedded pipe is 40 cm, a guide cap is arranged at the end, corresponding to the anchorage device, of a steel strand, the guide cap is arranged to guarantee smooth anchoring of the anchor cable, the steel strand of the inner section is locked through a tightening ring and filled with M35 cement mortar, an anchoring section is formed, the steel strand of the middle section is fixed through a stringing ring, and the steel strand of the outer section is fixed through a stringing ring. By adopting the implementation of the anchoring measure, the stability of slope protection can be well improved.

Description

Technical Field

[0001] The utility model relates to the field of cutting slope protection, and specifically relates to an implementation structure of a high-fill and deep-excavation subgrade frame beam for realizing cutting slope protection. Background Art

[0002] When highway construction needs to pass through mountain structures, the common practice is to excavate along the surface of the mountain to form the foundation of the highway and the slopes on the roadside. After the pavement is paved on the subgrade of the highway, sandstone, mudstone intercalated with sandstone, etc. on the slope side are prone to sliding failure. The tensile force of the prestressed anchor cables of the existing protective structures is poor, so corresponding cutting slope protection needs to be realized. Content of the Utility Model

[0003] Therefore, in order to solve the above deficiencies and increase the stability of slope protection, the utility model provides an implementation structure of a high-fill and deep-excavation subgrade frame beam here, specifically a design structure of a cutting slope frame beam for realizing cutting slope protection. The implementation of the described anchoring measures can improve the stability of its slope protection.

[0004] The utility model is implemented as follows: construct an implementation structure of a high-fill and deep-excavation subgrade frame beam; including a frame beam composed of frame cross beams and frame vertical beams, the frame beam forms multiple cells, and each cell is fixed by a group of prestressed anchor cables; the prestressed anchor cables include 15-4 type anchor fittings, the anchor fittings correspond to within a Φ90 PVC embedded pipe, the embedded pipe is 40 cm long, the end of the steel strand corresponding to the anchor fitting is a guide cap, setting the guide cap is to ensure the smooth lowering of the anchor cable, the internal section of the steel strand is locked by a tightening ring and filled with M35 cement mortar to form an anchoring section, and the middle section of the steel strand is fixed by a wire support ring to form a free section.

[0005] Furthermore; multiple groups of support piers are cast at the bottom of the frame beam; the support piers are C20 concrete with specifications of length×width×height of 60×60×50 cm.

[0006] Furthermore; 5 cm thick C20 pea gravel concrete is set at the upper and lower ends of the frame beam for cultivating soil and growing grass naturally, and the outside of the C20 pea gravel concrete is a masonry pebble top protection.

[0007] Furthermore; C30 concrete cushions and C30 concrete anchor sealing are set at the ends of the anchor fittings.

[0008] Furthermore; an 8 m long anchoring section is formed.

[0009] Furthermore; the guide cap can be made by bending and welding Φ8 steel bars and winding with No. 8 iron wire.

[0010] Furthermore; the inner diameter of the guide cap is 60 cm, and the top forms a 60-degree included angle end.

[0011] The utility model has the following advantages: The utility model provides an implementation structure of a high-fill and deep-excavation roadbed frame beam, which includes a frame beam composed of frame cross beams and frame vertical beams. The frame beam forms a plurality of cells, and each cell is fixed by a group of prestressed anchor cables. In this application, the prestressed anchor cable includes a 15-4 type anchor, and the anchor is corresponding to the inside of a Φ90 PVC embedded pipe. The length of the embedded pipe is 40 cm. The end of the steel strand corresponding to the anchor is a guide cap. The guide cap is set to ensure the smooth anchoring of the anchor cable. The internal section of the steel strand is locked by a tightening ring and filled with M35 cement mortar to form an anchorage section. The middle section of the steel strand is fixed by a wire support ring to form a free section. The implementation of the said anchorage measures ensures the stability of its slope protection. Description of the Drawings

[0012] Figure 1 is the structural diagram of the frame anchor cable of this application;

[0013] Figure 2 is Figure 1 the corresponding schematic diagram in the A-A direction;

[0014] Figure 3 is Figure 2 the sectional view of B-B (frame) in ;

[0015] Figure 4 is Figure 2 the sectional view of C-C in ;

[0016] Figure 5 is the reinforcement drawing of the frame beam node;

[0017] Figure 6 is the structural diagram of the prestressed anchor cable (tensile type);

[0018] Figure 7 is Figure 6 the large-scale drawing of A-A (wire support ring) in ;

[0019] Figure 8 is Figure 6 the large-scale drawing of B-B (tightening ring) in ;

[0020] Figure 9 is the large-scale drawing of the guide cap.

[0021] Wherein: frame cross beam 1, frame vertical beam 2, support pier 3, C20 small stone concrete 4, M7.5 masonry of flake pebbles for roof protection 5, anchor 6, Φ90 PVC embedded pipe 7, steel strand 8, guide cap 9, tightening ring 10, M35 cement mortar 11, wire support ring 12, C30 concrete cushion block 13, C30 concrete for sealing the anchor 14. Detailed Implementation Modes

[0022] The following will be combined with the attached Figures 1 - 9A detailed description of the present utility model is given, and the technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the protection scope of the present utility model.

[0023] The present utility model hereby provides an implementation structure of a high-fill and deep-excavation roadbed frame beam, as Figures 1 - 9 shown, and can be implemented in the following manner; it includes a frame beam composed of a frame cross beam 1 and a frame vertical beam 2, the frame beam forms a plurality of cells, and each cell is fixed by a group of prestressed anchor cables.

[0024] In this application, multiple groups of support piers 3 are cast at the bottom of the frame beam; the support piers 3 are C20 concrete with specifications of length × width × height of 60×60×50 cm.

[0025] In this application, C20 small gravel concrete 4 with a thickness of 5 cm is provided at the upper and lower ends of the frame beam for cultivating soil and growing grass naturally, and outside the C20 small gravel concrete 4 is an M7.5 masonry pebble roof protection 5.

[0026] In this application, the prestressed anchor cable includes a 15-4 type anchor 6, the anchor is corresponding to inside a Φ90 PVC embedded pipe 7, the embedded pipe 7 is 40 cm long, the end of the steel strand 8 corresponding to the anchor is a guide cap 9, setting the guide cap is to ensure the smooth lowering of the anchor cable, the internal section of the steel strand is locked by a tightening ring 10, and M35 cement mortar 11 is filled to form an anchorage section, the middle section of the steel strand is fixed by a wire ring 12 to form a free section, and the implementation of the described anchorage measures ensures the stability of its slope protection.

[0027] In this application, a C30 concrete cushion block 13 and a C30 concrete anchor sealing 14 are provided at the end of the anchor.

[0028] In this application, an 8 m long anchorage section is formed.

[0029] In this application, the guide cap 9 can be made by bending and welding Φ8 steel bars and winding with No. 8 iron wire.

[0030] In this application, the inner diameter of the guide cap 9 is 60 cm, and the top forms a 60-degree angle end.

[0031] It should be noted that: the technical solution described in this application is applicable to the slope protection of cut slopes with a slope ratio of 1:0.5 to 1:1.0, such as sandstone, mudstone intercalated with sandstone, etc., which are prone to sliding failure; vegetation bags are used for greening, and for other slope rates, three-dimensional nets or substrate-based grass planting greening can be used according to different slope types.

[0032] The frame grid beams are cast-in-place C30 concrete. Expansion joints are provided at intervals of 12 - 15 m for the cross beams, with a joint width of 2 cm, which are filled with asphalt hemp wadding.

[0033] Figure 5 The lengths of the N1 and N2 steel bars are the lengths of the frame cells. During actual construction, the N1 steel bars of several cells are connected. The main steel bars of the frame beams are lengthened by welding or lapping. The reinforcement at the joints of the frame beams should be locally adjusted according to the reserved anchor cable holes. The lengthening and welding of the steel bars must comply with the requirements of relevant construction specifications. The main steel bars at the ends of the frame cross and vertical beams are bent up by 12.5 cm.

[0034] The main steel bars between two expansion joints should be pulled through and fabricated into a steel bar framework, and only disconnected at the expansion joints. The net concrete cover thickness of the stirrups of the frame beams shall not be less than 3 cm.

[0035] In this application, the tightening rings and wire laying rings can be replaced by standardized products, but the sizes must be appropriate to ensure that the anchor cables are centered in the holes.

[0036] The anchor cables adopt 4 Φ15.2 mm low-relaxation steel strands (1860 MPa), and the anchor fittings are of 15-4 type (including complete sets of products such as wedge-shaped anchors, anchor plates, anchor backing plates, and spiral stirrups).

[0037] The wire laying rings and tightening rings in the anchorage section are arranged at intervals of 0.75 m; one wire laying ring is arranged every 2 m in the free section to ensure the straightness of the steel strands.

[0038] The grouting pressure is 0.6 - 0.8 MPa. After the anchor cables are tensioned and locked, supplementary grouting needs to be carried out from the grouting holes on the steel backing plates, and then the anchor heads are sealed: The anchor heads are sealed with C30 concrete, and the net cover thickness is not less than 35 mm.

[0039] The designed anchoring force of a single anchor cable is 500 KN, and the anchoring length in stable rock mass is not less than 8 m. Anchoring tests should be carried out according to 3% of the number of working anchor cables, and the average pulling force of the anchoring tests should not be less than the over-tension force of the prestressed anchor cables.

[0040] A guide cap is set to ensure the smooth lowering of the anchor cables. The guide cap can be made by bending and welding Φ8 steel bars and winding with No. 8 iron wires. The C30 concrete cushion blocks should be cast simultaneously with the C30 reinforced concrete frame joints.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-fill deep-dig roadbed frame beam implementation structure, characterized in that; The invention comprises a frame beam composed of a frame cross beam (1) and a frame vertical beam (2), wherein the frame beam forms a plurality of cells, each of which is fixed by a group of prestressed anchor cables; the prestressed anchor cables comprise a 15-4 type anchor (6), wherein the anchor corresponds to a Φ90PVC pre-buried pipe (7), the pre-buried pipe (7) is 40 cm long, and the end of the steel strand (8) corresponding to the anchor is a guide cap (9), which is provided to ensure that the anchor cable is smoothly anchored, the inner section of the steel strand is locked by a clamp ring (10), and filled with M35 cement mortar (11), forming an anchoring section, and the middle section of the steel strand is fixed by a wire ring (12), forming a free section.

2. According to claim 1, a high-fill deep-dig roadbed frame beam implementation structure is characterized in that; A plurality of supporting piers (3) are cast at the bottom of the frame beam; the supporting piers (3) are C20 concrete with a length, width and height specification of 60×60×50 cm.

3. According to claim 1, a high-fill deep-dig roadbed frame beam implementation structure is characterized in that; The upper and lower ends of the frame beam are provided with 5 cm thick C20 pebble concrete (4) for soiling and natural grass growth, and the outer side of the C20 pebble concrete (4) is provided with a shingle pebble top protection (5).

4. The high-fill deep-dig roadbed frame beam implementation structure according to claim 1, characterized in that: A C30 concrete pad (13) and a C30 concrete anchor (14) are arranged at the end of the anchor.

5. The high-fill deep-dig roadbed frame beam implementation structure according to claim 1, characterized in that; An 8m anchoring section is formed.

6. The high-fill deep-dig roadbed frame beam implementation structure according to claim 1 is characterized in that The guide cap (9) can be made of Φ8 steel bars bent and welded and wound with No. 8 iron wire.

7. The high-fill deep-dig roadbed frame beam implementation structure according to claim 1 is characterized in that The inner diameter of the guide cap (9) is 60 cm, and the top forms a 60-degree angle end.

Images