阅读说明：本技术 适用于膨胀土边坡的含eps弹性垫层的拼装式锚杆框架梁结构 (Assembly type anchor rod frame beam structure containing EPS elastic cushion layer and suitable for expansive soil slope ) 是由 谢彦初 孙德安 汪磊 徐永福 于 2020-09-11 设计创作，主要内容包括：本发明公开一种适用于膨胀土边坡的含弹性垫层的拼装式锚杆框架梁结构及其施工方法。本发明以有效提高锚杆框架梁的施工效率和质量,并节省框架梁用料成本,提高锚杆框架梁结构的综合支护效果。包括钢筋混凝土凹型梁预制单元,以及设置在钢筋混凝土凹型梁预制单元两侧的EPS(聚苯乙烯)弹性垫层和设置在钢筋混凝土框架梁节点处的锚杆。所述钢筋混凝土框架梁由钢筋混凝土凹型梁预制单元和节点处的现浇混凝土和螺栓连接而成；所述EPS弹性垫层则设置于框架梁两侧。本发明拼装式锚杆框架梁结构,以有效提高边坡支护工程的施工效率和质量,并减少框架梁用料成本,提高锚杆框架梁结构的支护效果和工程的经济效益。(The invention discloses an assembled anchor rod frame beam structure containing an elastic cushion layer and suitable for an expansive soil side slope and a construction method thereof. The invention effectively improves the construction efficiency and quality of the anchor rod frame beam, saves the material cost of the frame beam and improves the comprehensive supporting effect of the anchor rod frame beam structure. The reinforced concrete concave beam prefabricated unit comprises a reinforced concrete concave beam prefabricated unit, EPS (polystyrene) elastic cushion layers arranged on two sides of the reinforced concrete concave beam prefabricated unit and anchor rods arranged at the joints of reinforced concrete frame beams. The reinforced concrete frame beam is formed by connecting a reinforced concrete concave beam prefabricated unit with cast-in-place concrete at a node and a bolt; the EPS elastic cushion layer is arranged on two sides of the frame beam. The assembled anchor rod frame beam structure effectively improves the construction efficiency and quality of slope support engineering, reduces the material cost of the frame beam, and improves the support effect of the anchor rod frame beam structure and the economic benefit of the engineering.)

1. The utility model provides a pin-connected panel stock frame beam structure that contains EPS elastic cushion suitable for inflation soil slope, includes reinforced concrete concave beam prefabricated element (10), its characterized in that: the reinforced concrete concave beam prefabricated unit (10) is arranged transversely and longitudinally, the node (30) is connected with a bolt (34) through cast-in-place reinforced concrete (32), the bolt (34) penetrates through a bolt hole (12) formed in the connecting portion of the reinforced concrete concave beam prefabricated unit (10) which is connected adjacently, an anchor rod hole (31) is reserved, and an anchor rod is installed to form an assembled anchor rod frame beam structure.

2. The EPS-containing elastic cushion assembled anchor rod frame beam structure suitable for the expansive soil slope as claimed in claim 1, wherein: cast in situ concrete (32) forms stock at node (30) and cuts water reason (33) structure, seals stock and shows the section, makes stock and frame beam structure carry out zonulae occludens, assembles formation reinforced concrete frame beam.

3. The EPS-containing elastic cushion assembled anchor rod frame beam structure suitable for the expansive soil slope as claimed in claim 1, wherein: EPS elastic cushion layers (20) are arranged on two sides of the reinforced concrete concave beam prefabricating unit (10), and the EPS elastic cushion layers (20) are flush with the concave beam.

4. The assembled anchor rod frame beam structure containing the EPS elastic cushion layer applicable to the expansive soil slope as claimed in claim 1, which is characterized in that: the anchor rod consists of a threaded steel bar anchor rod and a circular steel base plate sleeved at the exposed end of the threaded steel bar anchor rod.

5. The assembled anchor rod frame beam structure containing the EPS elastic cushion layer applicable to the expansive soil slope as claimed in claim 1, which is characterized in that: the reinforced concrete concave beam prefabricating unit (10) is provided with frame beam reinforcing bars, the reinforcing bars comprise main bars (13) and stirrups (14), the main bars (13) are longitudinally arranged at the bottom and two sides of a concave beam body of the reinforced concrete concave beam prefabricating unit (10) at intervals along the extending direction of the reinforced concrete concave beam prefabricating unit (10), and the stirrups (14) are fixedly connected with the main bars (13); the components are arranged at intervals; main muscle (13) of concave type roof beam body bottom extend the terminal surface at precast beam both ends and form main muscle extension (11), correspond main muscle extension (11) fixed connection of terminal surface in the cast in situ concrete node.

6. The construction method of the assembled anchor rod frame beam structure containing the EPS elastic cushion layer suitable for the expansive soil slope according to any one of claims 1 to 5, which comprises the following construction steps:

firstly, after excavating the expansive soil slope surface according to a design gradient, excavating a construction groove for embedding a reinforced concrete concave beam prefabricated unit; paving broken stones in the construction groove to serve as a foundation of the reinforced concrete concave beam prefabricated unit;

hoisting the prefabricated reinforced concrete concave beam prefabricated units into a construction groove in sequence, placing and fixing EPS elastic cushion layers with the same size as the side surfaces of the prefabricated reinforced concrete concave beam units on two sides, arranging waterproof coatings on the EPS elastic cushion layers, and aligning bolt holes;

welding main reinforcement extending sections at the joint together, and reserving an anchor rod hole;

drilling holes in the reserved anchor rod holes towards the side slope, injecting cement mortar into the anchor rod holes by adopting a hole bottom grouting method after the twisted steel anchor rods are placed, and installing a steel backing plate after the cement mortar meets the strength requirement;

pouring concrete in situ at the joint butt joint part, sealing the exposed section of the anchor rod, and assembling to form a reinforced concrete frame beam;

and sixthly, backfilling gaps between the EPS elastic cushion layer and the construction groove walls by using the expansive soil, and performing vegetation greening treatment on the slope surface in the frame to finish the construction process.

Technical Field

The invention relates to the technical field of geotechnical engineering slope anchoring, in particular to an EPS elastic cushion layer-containing assembled anchor rod frame beam structure suitable for an expansive soil slope and a construction method thereof.

Background

The anchor rod frame beam side slope supporting structure has good integrity and strong rigidity, is suitable for greening, and is widely applied to side slope reinforcement in expansive soil areas. The frame is used for restraining the slope soil body and inhibiting the slope soil body from deforming. The anchor rod is used for embedding and fixing the deep soil body and fixing the frame. Meanwhile, the vegetation root in the frame can also reinforce the shallow soil body, and the influence caused by the dry-wet cycle of the expansive soil due to the weather is relieved.

At present, frame beam prefabrication forms in projects are cross-shaped prefabricated beam units which are prefabricated together with frame beam nodes, and the cross-shaped prefabricated beam units are spliced or connected through cast-in-place sections on site. And because the expansive force of the expansive soil is larger than that of the common soil, the reinforcing bars of the frame beam are correspondingly increased, and the cost is increased.

The invention patent with the patent application number of 201811226374.X discloses an assembled anchor rod frame beam and a construction method thereof. Effectively improved frame beam reinforced concrete quality, practiced thrift the manpower, and through applying low prestressing force for the stock, improved the effect of strutting of whole system. But the frame beam of the cross limb has large prefabrication difficulty and high cost, and the slope drainage measures only depend on the side ditches, thus having little effect.

The utility model discloses a be 201822149990.1 a utility model patent discloses a pin-connected panel shock attenuation stock frame roof beam, include prefabricated cross lattice beam component of reinforced concrete and the prefabricated tie-beam component of reinforced concrete and set up the antidetonation energy dissipation bed course between bottom surface and ground layer. The construction convenience of the side slope frame beam and the stability of the side slope under the earthquake working condition are effectively improved. However, the whole frame beam is only connected by the anchor bolts, if the anchor bolts are damaged, the whole structure fails under the action of huge expansive force of expansive soil, and the cross lattice beam component is high in prefabrication difficulty and high in cost.

Disclosure of Invention

The invention aims to provide an assembled anchor rod frame beam structure containing an elastic cushion layer and suitable for an expansive soil side slope, aiming at overcoming the defects of the prior art, so that the construction efficiency and quality of the side slope support engineering are effectively improved, the material cost of the frame beam is reduced, and the support effect of the anchor rod frame beam structure and the economic benefit of the engineering are improved.

In order to realize the purpose of the invention, the following technical scheme is adopted:

the assembled anchor rod frame beam structure comprises reinforced concrete concave beam prefabricated units, wherein the reinforced concrete concave beam prefabricated units are transversely and longitudinally arranged, nodes are connected through cast-in-place reinforced concrete and bolts, the bolts penetrate through bolt holes formed in connecting parts of the reinforced concrete concave beam prefabricated units which are adjacently connected, anchor rod holes are reserved, anchor rods are installed, and the assembled anchor rod frame beam structure is formed. Preferably, the reinforced concrete concave beam is an independent prefabricated unit.

Preferably, cast in situ concrete forms the stock at the node and cuts the water fringe structure, seals the stock and shows the section, makes stock and frame beam structure carry out zonulae occludens, assembles formation reinforced concrete frame beam.

Preferably, EPS elastic cushion layers are arranged on two sides of the reinforced concrete concave beam prefabricating unit and are flush with the concave beam.

Preferably, the anchor rod is composed of a threaded steel bar anchor rod and a round steel backing plate sleeved at the exposed end of the threaded steel bar anchor rod.

Preferably, the reinforced concrete concave beam prefabricating unit is provided with frame beam reinforcing bars, the reinforcing bars comprise main bars and stirrups, the main bars are longitudinally arranged at the bottom and two sides of the concave beam body of the reinforced concrete concave beam prefabricating unit at intervals along the extending direction of the reinforced concrete concave beam prefabricating unit, and the stirrups are fixedly connected with the main bars; the components are arranged at intervals; the main reinforcement of concave type roof beam body bottom extends the terminal surface at precast beam both ends and forms main muscle extension section, corresponds the main muscle extension section fixed connection of terminal surface in cast in situ concrete node.

Preferably, the reinforced concrete concave beam prefabricating unit is provided with reinforcing bars at the bottom and two sides, and mainly comprises main bars and stirrups, wherein the main bars are arranged along the length direction of the concave beam body, and the stirrups are arranged at intervals vertical to the main bars and are bound and connected with the main bars; the main reinforcement is provided with an extension section and bolt holes at two ends of the concave beam body, is bound at a node, is cast with concrete in situ and is fixedly connected by using bolts.

Another technical problem to be solved by the present invention is to provide a construction method of an assembly type anchor rod frame beam structure containing an EPS cushion layer, which is suitable for an expansive soil slope, the method comprising the following steps:

firstly, after excavating the expansive soil slope surface according to a design gradient, excavating a construction groove for embedding a reinforced concrete concave beam; paving broken stones in the construction groove to serve as a foundation of the frame beam;

hoisting the prefabricated reinforced concrete concave beam prefabricated units into a construction groove in sequence, placing and fixing EPS elastic cushion layers with the same size as the side surfaces of the prefabricated reinforced concrete concave beam units on two sides, arranging waterproof coatings on the EPS elastic cushion layers, and aligning bolt holes;

welding main ribs extending from the joint joints together, and reserving anchor rod hole sites;

drilling holes in the reserved anchor rod holes towards the side slope, injecting cement mortar into the anchor rod holes by adopting a hole bottom grouting method after the twisted steel anchor rods are placed, and installing a steel backing plate after the cement mortar meets the strength requirement;

and fifthly, casting concrete in situ at the joint butt joint part, sealing the exposed section of the anchor rod, and assembling to form the reinforced concrete frame beam.

And sixthly, backfilling gaps between the EPS elastic cushion layer and the construction groove walls by using the expansive soil, and performing vegetation greening treatment on the slope surface in the frame to finish the construction process.

Compared with the prior art, the invention has obvious prominent essential characteristics and obvious advantages:

1. the reinforced concrete frame beam is formed by splicing the reinforced concrete concave beam prefabricated unit, the cast-in-place concrete at the node and the bolts, so that the manufacturing difficulty of the prefabricated unit is greatly reduced, the anchor rod is installed firstly, and then the concrete is cast in place at the node, so that the anchor rod and the frame beam are connected more tightly, and the structural integrity and the construction efficiency of the frame beam are improved;

2. the EPS cushion layers arranged on the two sides of the concave beam allow the expansive soil slope to deform to a certain extent, and the expansion force borne by the concave beam is reduced by offsetting partial expansion force through self compression, so that the reinforcement cost of the concave beam is greatly saved;

3. the construction method is simple, high in efficiency, low in cost and easy to implement.

Drawings

Fig. 1 is a schematic view of the overall structure of the assembled anchor frame beam structure of the present invention.

Fig. 2 is a top view of a reinforced concrete prefabricated concave beam unit according to the present invention.

Fig. 3 is a detailed view of a frame beam node of the present invention.

Fig. 4 is a cross-sectional view of a concave beam of the present invention.

The method comprises the following steps of 10-reinforced concrete concave beam prefabricating units, 11-main reinforcement extending sections, 12-bolt holes, 13-main reinforcements, 14-stirrups, 20-EPS elastic cushion layers, 30-nodes, 31-anchor rod holes, 32-cast-in-place concrete, 33-anchor rod water-intercepting edges and 34-bolts.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

The first embodiment is as follows:

referring to fig. 1 and 3, the assembled anchor rod frame beam structure suitable for the expansive soil slope and containing the EPS elastic cushion layer comprises reinforced concrete concave beam prefabricated units 10, wherein the reinforced concrete concave beam prefabricated units 10 are transversely and longitudinally arranged, nodes 30 are connected through cast-in-place reinforced concrete 32 and bolts 34, the bolts 34 penetrate through bolt holes 12 formed in the connecting parts of the reinforced concrete concave beam prefabricated units 10 which are adjacently connected, anchor rod holes 31 are reserved, and anchor rods are installed to form the assembled anchor rod frame beam structure.

The reinforced concrete frame beam is formed by splicing the reinforced concrete concave beam prefabricated unit, the cast-in-place concrete at the node and the bolts, the manufacturing difficulty of the prefabricated unit is greatly reduced, the anchor rod is installed firstly, then the concrete is cast in the node, the anchor rod and the frame beam are connected more tightly, and the integrity and the construction efficiency of the frame beam structure are improved.

Example two:

this embodiment is substantially the same as the first embodiment, and is characterized in that:

referring to fig. 1 and 3, concrete 32 is cast in place at the node 30 to form an anchor rod water-intercepting edge 33 structure, and an exposed section of the anchor rod is sealed, so that the anchor rod and the frame beam structure are tightly connected and assembled to form the reinforced concrete frame beam.

The node 30 of the embodiment is connected with a bolt 34 through cast-in-place reinforced concrete 32, an anchor rod hole 31 is reserved, and after an anchor rod is poured and installed, an anchor rod water intercepting edge 33 is formed through the cast-in-place reinforced concrete 32 so that the anchor rod is tightly connected with the frame beam. In the embodiment, the anchor rod water-intercepting edge 33 structure is formed by adopting a cast-in-place method, the waterproof measure of the anchor rod is enhanced, the integral strength of the assembled anchor rod frame beam structure is ensured, the assembled anchor rod frame beam structure is stably connected with the slope surface of the construction expansive soil slope, and the construction efficiency and the quality of the anchor rod frame beam are effectively improved.

Example three:

this embodiment is substantially the same as the above embodiment, and is characterized in that:

referring to fig. 1 to 4, EPS elastic cushion layers 20 are arranged on both sides of a reinforced concrete concave beam prefabricating unit 10, and the EPS elastic cushion layers 20 are flush with the concave beam.

The EPS cushions arranged on the two sides of the concave beam allow the expansive soil slope to deform to a certain extent, and the expansion force applied to the concave beam is reduced by offsetting partial expansion force through self compression, so that the reinforcement cost of the concave beam is greatly saved.

Example four:

this embodiment is substantially the same as the above embodiment, and is characterized in that:

the anchor rod consists of a threaded steel bar anchor rod and a circular steel base plate sleeved at the exposed end of the threaded steel bar anchor rod. The anchor rod is simple in structure, easy to install and maintain, the anchor rod is installed, concrete is cast at the node, the anchor rod is connected with the frame beam more tightly, and the integrity and the construction efficiency of the frame beam structure are improved.

Example five:

this embodiment is substantially the same as the above embodiment, and is characterized in that:

referring to fig. 1-4, the reinforced concrete concave beam prefabricating unit 10 is provided with frame beam reinforcing bars, the reinforcing bars comprise main bars 13 and stirrups 14, the main bars 13 are longitudinally arranged at intervals at the bottom and two sides of a concave beam body of the reinforced concrete concave beam prefabricating unit 10 along the extending direction of the reinforced concrete concave beam prefabricating unit 10, and the stirrups 14 are fixedly connected with the main bars 13; the components are arranged at intervals; the main reinforcement 13 at the bottom of the concave beam body extends out of the end faces at the two ends of the precast beam to form a main reinforcement extension section 11, and the main reinforcement extension sections 11 corresponding to the end faces in the cast-in-place concrete node are fixedly connected.

Example six:

referring to fig. 1, 2, 3 and 4, a construction method of an anchor frame beam structure including an EPS pad layer suitable for an expansive soil slope includes the steps of:

firstly, after excavating the expansive soil slope surface according to a design gradient, excavating a construction groove for embedding the reinforced concrete concave beam prefabricated unit 10; and paving broken stones in the construction groove to serve as a foundation of the reinforced concrete concave beam prefabricated unit 10;

hoisting the prefabricated reinforced concrete concave beam prefabricated units 10 into a construction groove in sequence, placing and fixing EPS elastic cushion layers 20 with the same size as the side faces of the prefabricated reinforced concrete concave beam units on two sides, arranging waterproof coatings on the EPS elastic cushion layers 20, aligning the EPS elastic cushion layers with the bolt holes 12, and binding main reinforcement extension sections 11;

welding main reinforcement extension sections 11 of the reinforced concrete concave beam prefabricated units 10 at the joints 30 together, reserving anchor rod holes 31, and assembling and fixing bolts 34;

drilling holes into the reserved anchor rod holes 31 to the side slope, injecting cement mortar into the anchor rod holes by adopting a hole bottom grouting method after the twisted steel anchor rods are placed, and installing a steel backing plate after the cement mortar meets the strength requirement;

pouring concrete 32 in situ at the joint of the node 30, simultaneously pouring an anchor rod water cut edge 33, sealing the exposed section of the anchor rod, and assembling to form a reinforced concrete frame beam;

and sixthly, backfilling gaps between the EPS elastic cushion layer 20 and the construction groove walls by using the expansive soil, and carrying out vegetation greening treatment on the slope surface in the frame to finish the construction process.

The construction method effectively improves the construction efficiency and quality of the anchor rod frame beam, saves the material cost of the frame beam and improves the comprehensive supporting effect of the anchor rod frame beam structure. In the embodiment, the reinforced concrete concave beam prefabricated unit, the EPS (polystyrene) elastic cushion layers arranged on two sides of the reinforced concrete concave beam prefabricated unit and the anchor rods arranged at the joints of the reinforced concrete frame beams are adopted. The reinforced concrete frame beam is formed by connecting a reinforced concrete concave beam prefabricated unit with cast-in-place concrete at a node and a bolt; the EPS elastic cushion layer is arranged on two sides of the frame beam. The reinforced concrete frame beam constructed in the embodiment is formed by splicing the reinforced concrete concave beam prefabricated unit, the cast-in-place concrete at the node and the bolts, so that the manufacturing difficulty of the prefabricated unit is greatly reduced, the anchor rod is firstly installed, and then the concrete is cast in place at the node, so that the anchor rod and the frame beam are connected more tightly, and the structural integrity and the construction efficiency of the frame beam are improved; the EPS cushions arranged on the two sides of the concave beam allow the expansive soil slope to deform to a certain extent, and the expansion force applied to the concave beam is reduced by offsetting partial expansion force through self compression, so that the reinforcement cost of the concave beam is greatly saved; the construction method is simple, high in efficiency, low in cost and easy to implement.

The foregoing is merely illustrative of some of the principles of the present invention of an assembled anchor frame beam structure with resilient cushion for an expansive soil slope and method of construction thereof, and is not intended to limit the invention to the specific constructions and applications shown and described, and accordingly, all modifications and equivalents thereof that may be utilized are intended to fall within the scope of the claims.