CN215562701U

CN215562701U - Half-frame type anti-skidding group key suitable for high fill bank protection of mountain area roadbed

Info

Publication number: CN215562701U
Application number: CN202121391657.7U
Authority: CN
Inventors: 涂义亮; 陈晓虎; 张瑞; 柴贺军; 赵明阶; 王星驰; 方忠; 李军; 兰雨舟
Original assignee: Chongqing Jiaotong University
Current assignee: Chongqing Jiaotong University
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-01-18
Anticipated expiration: 2031-06-22

Abstract

The utility model discloses a half-frame type anti-sliding group key suitable for a high fill slope protection of a roadbed in a mountainous area, and relates to the field of slope support; the frame columns are vertically arranged, the lower ends of the frame columns are downwards embedded into bedrock, and the upper ends of the frame columns are positioned in a filling side slope; the frame roof beam level sets up, in the inner embedding bed rock of frame roof beam, the outer end of frame roof beam is located and fills the slope, and the outer end of frame roof beam with the upper end of frame post forms the rigid joint. The anti-shear device has the advantages of strong anti-shear capability and high bending rigidity, is particularly suitable for a high-anti-slip key structure of a key body, and effectively improves the supporting effect.

Description

Half-frame type anti-skidding group key suitable for high fill bank protection of mountain area roadbed

Technical Field

The utility model relates to a half-frame type anti-sliding group key suitable for a high fill slope protection of a roadbed in a mountain area, and mainly relates to the field of slope support.

Background

In the process of mountain road engineering construction, the subgrade is subjected to high fill treatment due to large mountain fluctuation, so that a high fill side slope which is easy to slide is formed. The stability of the high fill side slope is the key to the safe operation of the road engineering in the mountainous area, so that the adoption of a safe and economic side slope supporting structure is particularly important. The current side slope supporting structure mainly comprises methods of retaining walls, anti-slide piles, anti-slide keys, or combined anchoring and the like. The traditional anti-sliding key usually adopts a cantilever structure form, has the defects of weak shearing resistance, low bending rigidity and the like, and is not suitable for being too high.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the half-frame type anti-sliding group key suitable for the high fill slope protection of the roadbed in the mountainous area, which has the advantages of strong shearing resistance and high bending rigidity, is particularly suitable for an anti-sliding key structure with a higher key body, and effectively improves the supporting effect.

In order to achieve the purpose, the technical scheme of the utility model is as follows: the anti-sliding device comprises a plurality of anti-sliding keys, wherein each anti-sliding key comprises a frame column and a frame beam; the frame columns are vertically arranged, the lower ends of the frame columns are downwards embedded into bedrock, and the upper ends of the frame columns are positioned in a filling side slope; the frame roof beam level sets up, in the inner embedding basement rock of frame roof beam, the outer end of frame roof beam is located and fills the slope, and the outer end of frame roof beam with the upper end of frame post is fixed and is formed the rigid joint.

The technical principle and the beneficial effects of the utility model are as follows:

each anti-sliding key of this scheme sets up mutual independence earlier stage, and interval between each other can the value wantonly, and is more nimble changeable, only need in the construction to drilling in the basement rock, then pour frame roof beam and frame post, make the outer end of frame roof beam and the upper end of frame post connect can, the construction degree of difficulty is very low, and the basement rock degree of depth can be selected according to actual conditions simultaneously, does not need other considerations, and consequently the reliability of construction is higher. The anti-shear device has the advantages of strong anti-shear capability and high bending rigidity, is particularly suitable for a high-anti-slip key structure of a key body, and effectively improves the supporting effect.

Preferably, the projection of each anti-sliding key on the horizontal plane is in a quincunx arrangement. And a semi-frame anti-sliding group key is formed, so that a firmer anti-sliding group key can be obtained.

Preferably, adjacent anti-sliding keys in the same row are connected through a connecting beam, and two ends of the connecting beam are respectively connected to the rigid nodes of the adjacent anti-sliding keys in the same row. The parts on the filling side slope are connected, so that the integrity of the anti-sliding key, particularly the transverse lateral displacement resistance rigidity, can be improved, the supporting area of the filling side slope can be increased, and the reinforcing effect is improved.

Preferably, the steel reinforcement frameworks of the frame columns, the frame beams and the connecting beams adopt longitudinal steel reinforcements arranged along the length direction and stirrups externally hooped on the longitudinal steel reinforcements. The strength of the frame column, the frame beam and the connecting beam is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments will be briefly introduced below, it is obvious that the drawings in the following description are only 4 of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of example 1 of the present invention;

fig. 2 is a schematic plan projection view of a frame column and a frame beam of embodiment 1 of the present invention;

fig. 3 is a schematic view of a frame column and a frame beam of embodiment 1 of the present invention;

fig. 4 is a schematic view of embodiment 2 of the present invention.

Wherein, bedrock 1, frame post 2, frame roof beam 3, fill side slope 4, stirrup 5, longitudinal reinforcement 6, tie-beam 7, packway 8, domatic 9, road surface 10.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are merely preferred embodiments of the present invention, rather than all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1, the embodiment of the present invention includes several anti-sliding keys, which include frame columns 2 and frame beams 3; the frame column 2 is vertically arranged, the lower end of the frame column 2 is downwards embedded into the bedrock 1, and the upper end of the frame column 2 is positioned in the filling side slope 4; the frame beam 3 is horizontally arranged, the inner end of the frame beam 3 is embedded into the bedrock 1, the outer end of the frame beam 3 is located in the filling side slope 4, and the outer end of the frame beam 3 and the upper end of the frame column 2 are fixed to form a rigid joint.

Each anti-sliding key of this scheme sets up mutual independence earlier stage, and interval between each other can the value wantonly, and is more nimble changeable, only need in the construction to basement rock 1 interior drilling, then pour frame roof beam 3 and frame post 2, make the outer end of frame roof beam 3 and the upper end of frame post 2 connect can, the construction degree of difficulty is very low, and the drilling depth can be selected according to actual conditions in the basement rock 1 simultaneously, does not have other considerations, and consequently the reliability of construction is higher. The anti-shear device has the advantages of strong anti-shear capability and high bending rigidity, is particularly suitable for a high-anti-slip key structure of a key body, and effectively improves the supporting effect.

The projection of each anti-sliding key on the horizontal plane is in a quincunx arrangement form. And a semi-frame anti-sliding group key is formed, so that a firmer anti-sliding group key can be obtained.

The concrete construction steps of the embodiment are as follows:

(1) and (5) preparing for construction. Preparing construction machines, such as large-scale vehicles like rock drills, excavators, concrete pump trucks and road rollers, measuring instruments like total stations and GPS positioning instruments, safety equipment like safety helmets and safety belts, and processing equipment like reinforcing steel bar processing and concrete mixers. And (4) measuring and positioning, namely measuring and positioning the central point position of the antiskid group key on the surface of the bedrock 1 according to a design drawing, and avoiding the deviation of the structure position to cause overlarge engineering error and structural instability.

(2) And (6) drilling. At the drilling center location point, the bedrock 1 is drilled, including vertical frame column 2 drilling and horizontal frame beam 3 drilling. The drilling adopts the circulating construction, the frame column 2 hole is drilled firstly, after the frame column 2 hole is drilled, the cover plate with stable structure is adopted to temporarily cover the drilled hole, and the influence or disturbance to the frame column 2 hole is prevented when the frame beam 3 hole is drilled; and then, drilling the frame beam 3 hole, wherein the depth of the hole is determined according to the engineering design. The water suction pump is used for underground water precipitation in the drilling process, and the construction progress is prevented from being influenced. Then, cleaning broken slag at the bottom of the hole to ensure that the hole is clean.

(3) Frame posts 2 are constructed. And erecting a side template of the frame column 2 in the vacant area above the drilled holes of the frame column 2, wherein the elevation of the top of the side template is flush with the elevation of the top of the frame column 2. Then, the reinforcement cage of the frame column 2 is prefabricated according to the design drawing, and the reinforcement connection can adopt a binding or welding connection mode. Then hoist prefabricated steel reinforcement cage, transfer to 2 templates of frame post, and steel reinforcement cage lower extreme stretches into 2 drilling bottoms of frame post. And pouring concrete of the frame column 2, vibrating to be compact, and reserving longitudinal steel bars on the top surface of the concrete for connecting with the steel bars of the frame beam 3. And (5) removing the formwork after the concrete is cured to reach certain strength, thereby completing the construction of the frame column 2.

(4) And (5) backfilling for one time. The prepared filler is used for layered filling, and rolling and tamping are carried out until the top surface of the first row of frame columns 2 is reached.

(5) And constructing a half-frame structure. And paving a layer of fine aggregate concrete 2cm later on the designed plane position of the frame beam 3 to the designed elevation of the beam bottom, and hardening the fine aggregate concrete to be used as a ground model of the frame beam 3. Then, a reinforcement cage of the frame beam 3 is manufactured on the mulching film according to a design drawing, the reinforcement connection can adopt a binding or welding connection mode, one end of the reinforcement cage extends into the bottom of the hole of the frame beam 3, and the other end of the reinforcement cage is connected with the reserved reinforcement of the frame column 2 to form a whole. Then, three side templates of the frame beam 3 are arranged at the section outside the drilled holes of the frame beam 3, and then the concrete of the frame beam 3 is poured and vibrated to be compact. And (4) removing the formwork after the concrete is cured to reach certain strength, thereby completing construction of the half-frame structure.

(6) And (5) backfilling for the second time. And continuously performing layered filling by using the prepared filler, and performing rolling and tamping until the drilling positioning points of the second row of frame columns 2 are reached.

(7) And (5) repeating the steps (2) to (6), paying attention to checking the construction quality of the frame columns 2 and the frame beams 3, wherein the construction quality comprises appearance detection, crack detection, concrete strength monitoring, anchoring effect detection and the like, and filling the filling slopes 4 to the second row and the third row … … in sequence until the elevation of the pavement 10 is reached.

The slope 9 of the filling side slope 4 can be obtained by checking and designing according to the filling specific conditions. When the filling height exceeds 5m, the filling side slope 4 can adopt graded slope releasing, and a berm 8 with a certain width is reserved between each grade.

(8) In order to prevent the adverse effect of rainfall and groundwater on the stability of the fill side slope 4 and enhance the side slope stability, drainage systems may be provided inside the fill side slope body and on the slope surface.

Example 2

Compared with embodiment 1, embodiment 2 has the following technical characteristics that adjacent anti-sliding keys in the same row are connected through the connecting beam 7, and two ends of the connecting beam 7 are respectively connected to the rigid nodes of the adjacent anti-sliding keys in the same row. That is, the parts on the fill side slope 4 are connected, so that the integrity of the anti-sliding key, particularly the transverse lateral displacement resistance rigidity, can be improved, the supporting area of the fill side slope can be increased, and the reinforcing effect can be improved.

The steel bar frameworks of the frame columns 2, the frame beams 3 and the connecting beams 7 adopt longitudinal steel bars 6 arranged along the length direction and stirrups 5 externally hooped on the longitudinal steel bars 6. The strength of the frame column 2, the frame beam 3 and the connecting beam 7 is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The half-frame type anti-sliding group key is suitable for roadbed high-fill slope protection in a mountainous area and is characterized by comprising a plurality of anti-sliding keys, wherein each anti-sliding key comprises a frame column (2) and a frame beam (3); the frame column (2) is vertically arranged, the lower end of the frame column (2) is downwards embedded into the bedrock (1), and the upper end of the frame column (2) is positioned in the filling side slope (4); the frame roof beam (3) level sets up, in the inner embedding bedrock (1) of frame roof beam (3), the outer end of frame roof beam (3) is located fill side slope (4), and the outer end of frame roof beam (3) with the upper end of frame post (2) is fixed forms the rigid joint.

2. The semi-frame type anti-skid group key suitable for the high fill revetment of the roadbed in the mountainous area as claimed in claim 1, wherein: the projection of each anti-sliding key on the horizontal plane is in a quincunx arrangement form.

3. The semi-frame type anti-skid group key suitable for the high fill revetment of the roadbed in the mountainous area as claimed in claim 2, wherein: the anti-sliding keys in the same row are connected through a connecting beam (7), and two ends of the connecting beam (7) are connected to the rigid nodes of the anti-sliding keys in the same row respectively.

4. The half-frame type anti-skid group key suitable for the high fill revetment of the roadbed in the mountainous area as claimed in claim 3, wherein: the steel bar frameworks of the frame columns (2), the frame beams (3) and the connecting beams (7) adopt longitudinal steel bars (6) arranged along the length direction and stirrups (5) externally hooped on the longitudinal steel bars (6).