CN109487803B - Assembled framework slope protection and construction method thereof - Google Patents

Assembled framework slope protection and construction method thereof Download PDF

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Publication number
CN109487803B
CN109487803B CN201811363989.7A CN201811363989A CN109487803B CN 109487803 B CN109487803 B CN 109487803B CN 201811363989 A CN201811363989 A CN 201811363989A CN 109487803 B CN109487803 B CN 109487803B
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section
connecting section
straight line
reinforcement cage
steel reinforcement
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CN109487803A (en
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张建经
诸洲
闫世杰
曹杰
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Southwest Jiaotong University
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Southwest Jiaotong University
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines
    • E02D17/205Securing of slopes or inclines with modular blocks, e.g. pre-fabricated
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0004Synthetics
    • E02D2300/0018Cement used as binder
    • E02D2300/002Concrete
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00Miscellaneous
    • E02D2600/20Miscellaneous comprising details of connection between elements

Abstract

The invention provides an assembled framework revetment and a construction method thereof, and relates to the technical field of framework revetment, wherein the assembled framework revetment comprises a plurality of connecting sections and a plurality of straight-line sections which are spliced with each other, each connecting section is in a cross shape and comprises a first steel reinforcement cage with an internal supporting function and a first concrete layer poured on the first steel reinforcement cage, first steel reinforcement joints extending out of the first concrete layer are reserved on the front side surfaces of the first steel reinforcement cage in four directions, and anchor holes penetrating through the connecting sections are formed in the connecting sections; the straightway comprises a second steel reinforcement cage with an internal supporting function and a second concrete layer poured on the second steel reinforcement cage, second steel reinforcement joints extending out of the second concrete layer are reserved at two ends of the second steel reinforcement cage, and the second steel reinforcement joints are connected with the first steel reinforcement joints. The problems that the framework slope protection construction process is complex, the construction speed is low and the construction quality is poor in the prior art are solved.

Description

Assembled framework slope protection and construction method thereof
Technical Field
The invention relates to the technical field of framework revetment, in particular to an assembled framework revetment and a construction method thereof.
Background
The framework protection slope refers to a frame type structure formed by concrete or grouted rubble on the side slope of a highway or a railway, and grass is planted in the middle of the frame for protection so as to prevent the side slope of the road bed from slipping and collapsing. The traditional construction process of the cast-in-place concrete or mortar rubble framework slope protection is complicated and slow; for a high and steep slope, the construction difficulty is higher, and the construction quality can not be strictly ensured.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an assembled framework revetment and a construction method thereof, and solves the problems of complex construction process, low construction speed and poor construction quality of the framework revetment in the prior art.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the assembled framework slope protection comprises a plurality of connecting sections and a plurality of straight-line sections which are spliced with each other, wherein each connecting section is in a cross shape and comprises a first steel reinforcement cage with the inner part playing a supporting role and a first concrete layer poured on the first steel reinforcement cage, first steel reinforcement joints extending out of the first concrete layer are reserved on the front side surfaces of the first steel reinforcement cage in four directions, and anchor holes penetrating through the connecting sections are formed in the connecting sections; the straightway comprises a second steel reinforcement cage with an internal supporting function and a second concrete layer poured on the second steel reinforcement cage, second steel reinforcement joints extending out of the second concrete layer are reserved at two ends of the second steel reinforcement cage, and the second steel reinforcement joints are connected with the first steel reinforcement joints.
Furthermore, a mortise is further arranged on the side face of the connecting section where the first steel bar joint is located, and the mortise is connected with tenons arranged at two ends of the straight line section in a matched mode. Through the cooperation of tenon and mortise, can make the concatenation of straightway and linkage segment more smooth and easy accurate to guarantee the smooth and neat of skeleton.
Furthermore, a first step surface is arranged at the joint of the connecting section and the straight line section, the first steel bar joint is positioned at the upper part of the first step surface, and the mortise is positioned at the lower part of the first step surface. And the two ends of the straight line section are provided with second step surfaces, the second steel bar joint is positioned at the upper part of the second step surfaces, and the tenon is positioned at the lower part of the second step surfaces. The positioning part and the pouring part of the straight line section and the connecting section are separated through the step surface, so that the formwork is more convenient to pour, and the flatness of the surface of the poured framework is ensured.
Further, the interior of the straight line segment is of a hollow structure. The method for processing the hollow straight-line segment is that a steel pipe is placed in the straight-line segment during casting, and the structure is light and attractive, large in torsional rigidity and high in bearing capacity.
The construction method of the assembled type framework revetment comprises the following steps:
step 1, prefabricating a connecting section and a straight line section in a processing workshop, and then transporting finished products of the connecting section and the straight line section to a construction site;
step 2, cleaning pumice or floating soil on the side slope, finishing the slope, determining the position of a framework, and excavating a framework foundation groove;
step 3, placing connecting sections at all crossed positions of the foundation trench, using anchor cables to penetrate through anchor holes to anchor the connecting sections on the slope, placing straight-line sections in the foundation trench between the two connecting sections and splicing the straight-line sections with the connecting sections, and adjusting the framework after splicing is completed to enable the connecting sections to be smoothly and orderly lapped with the straight-line sections;
step 4, fixedly connecting the second steel bar joint on the straight line section with the first steel bar joint at the corresponding position on the connecting section;
step 5, a formwork is erected at the connection position of the straight line section and the connection section, and concrete is poured to enable the connection position to be as high as the surrounding framework;
and 6, maintaining the cast-in-place concrete at the joint of the straight-line section and the connecting section, and removing the mold after the concrete is cured.
The invention has the beneficial effects that: the assembled framework slope protection adopts a mode that a prefabricated connecting section and a straight line section are spliced on a construction site, so that the construction steps are simplified, the construction efficiency is improved, and the construction period is shortened. Assembled skeleton bank protection in this scheme simple structure, degree of mechanization is high, has reduced job site personnel's outfit, has reduced the recruitment cost.
The connecting section and the straight line section are processed in batches by special technicians and processing machinery in a factory, so that the processing quality can be ensured, the working efficiency can be improved, the utilization rate of production raw materials is improved, the loss of materials is reduced, the quantity of construction waste on a construction site is also reduced, and the environment protection is facilitated.
Be provided with the anchor eye on the linkage segment, accessible anchor rope is fixed in the linkage segment on domatic to linkage segment and straightway junction are through cast in situ concrete connection, make whole skeleton bank protection intensity high, and stability is high.
Drawings
Fig. 1 is a schematic structural diagram of a first assembled framework slope protection connecting section after being assembled with a straight line segment.
Fig. 2 is a schematic structural view of the connecting section and the straight line section in fig. 1 before being assembled.
Fig. 3 is a schematic structural diagram of a second assembled framework slope protection connecting section after being assembled with a straight line segment.
Fig. 4 is a schematic structural view of the connecting section and the straight line section in fig. 3 before being assembled.
Fig. 5 is a schematic structural diagram of the finished assembled skeleton slope protection.
Wherein, 1, connecting segment; 11. a first reinforcement cage; 12. a first concrete layer; 13. a first rebar junction; 14. an anchor eye; 15. b, mortise drilling; 16. a first step surface; 2. a straight line segment; 21. a second reinforcement cage; 22. a second concrete layer; 23. a second rebar junction; 24. a tenon; 25. a second step surface.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Example 1
As shown in fig. 1, the assembled framework slope protection comprises a plurality of connecting sections 1 and a plurality of straight line sections 2 which are mutually spliced, and the number of the connecting sections 1 and the number of the straight line sections 2 are determined according to the actual area of the slope surface to be protected. As shown in fig. 2, the connection section 1 is cross-shaped, and includes a first reinforcement cage 11 having an internal supporting function and a first concrete layer 12 poured on the first reinforcement cage 11, and a first reinforcement joint 13 extending out of the first concrete layer 12 is reserved on a front side surface of the first reinforcement cage 11 in four directions. The connecting section 1 is provided with an anchor hole 14 penetrating through the connecting section, and the side face of the connecting section 1 where the first steel bar joint 13 is located is also provided with a mortise 15. The joint of the connecting section 1 and the straight line section 2 is provided with a first step surface 16, the first steel bar joint 13 is positioned at the upper part of the first step surface 16, and the mortise 15 is positioned at the lower part of the first step surface 16.
First steel reinforcement cage 11 includes the square stirrup of the main muscle and interval winding on the main muscle that the cross is pieced together into by twelve, and the main muscle all blocks in the right angle department of square stirrup, and the stirrup passes through ligature or welded mode fixed connection with the main muscle. After the first reinforcement cage 11 is processed, a formwork is supported around the first reinforcement cage, a certain length needs to be reserved for a main reinforcement at the formwork supporting position to serve as a first reinforcement joint 13, after molds of corresponding structures are placed at the anchor holes 14, the mortise holes 15 and the first step surface 16, concrete is poured, and after the concrete is dried and solidified, the formwork is removed.
The straight-line section 2 comprises a second steel reinforcement cage 21 and a second concrete layer 22, the inside of the second steel reinforcement cage 21 plays a supporting role, the second concrete layer 22 is poured on the second steel reinforcement cage 21, and second steel reinforcement joints 23 extending out of the second concrete layer 22 are reserved at two ends of the second steel reinforcement cage 21. Two ends of the straight line section 2 are provided with tenons 24 which are matched and connected with the mortise 15. Two ends of the straight line section 2 are provided with second step surfaces 25, the second steel bar joint 23 is positioned at the upper part of the second step surfaces 25, and the tenon 24 is positioned at the lower part of the second step surfaces 25. The interior of the straight line section 2 is a hollow structure.
The second steel reinforcement cage 21 comprises six parallel-arranged main reinforcements and square stirrups wound on the main reinforcements at intervals, the four main reinforcements are clamped at right angles of the square stirrups, the other two main reinforcements are positioned on the second step surface 25, and the stirrups and the main reinforcements are fixedly connected through binding or welding. After the second reinforcement cage 21 is machined, a round steel pipe is fixed at the middle position of the second reinforcement cage along the axial direction of the second reinforcement cage, the end heads are blocked, then a formwork is erected around the second reinforcement cage 21, molds of corresponding structures are placed on the second step surface 25 and the tenon 24, concrete is poured, and after the concrete is dried and solidified, the formwork is removed. The second reinforcement joint 23 is an outer leakage portion of four main reinforcements above the second step surface 25.
The construction method of the assembled type framework revetment comprises the following steps:
prefabricating the connecting sections 1 and the straight line sections 2 in a processing workshop through manual work and mechanical cooperation according to the process, and then transporting the finished products of the connecting sections 1 and the straight line sections 2 in corresponding quantity to a construction site;
the method comprises the following steps of cleaning pumice or floating soil on side slopes, filling pits to enable the slope surfaces to be substantially flat, carrying out leveling and tamping treatment on platforms between adjacent side slopes, and ensuring a certain one-way longitudinal slope to ensure the stability and drainage smoothness of a platform ditch; then, measurement is carried out according to a construction drawing, after the position of the framework is determined, lofting is required to be carried out at the cross-shaped intersection to guarantee the position accuracy of the connecting section and the straight line section, so that the later assembling step can be smoothly carried out, a framework foundation groove is excavated on the side slope in a mode that small tools are matched with manual excavation, unstable excavation foundation grooves and slope surfaces need to be subjected to replacement filling and tamping treatment, the same-level side slope is excavated from top to bottom, one step is in place, the groove bottom is dense and smooth, and over excavation is forbidden.
Firstly, fixing an anchor cable at the cross-shaped cross position of a foundation trench: drilling equipment is adopted to form holes below the bottom of the foundation trench, different processes are adopted according to the hole forming conditions, and casing follow is adopted if necessary, so that the smooth hole forming is ensured, the hole collapse is avoided, the hole forming depth is 0.5m longer than that of a designed anchor rod or anchor cable, and the situation that the hole depth is insufficient due to the fact that broken slag falls into the bottom of the hole is avoided; and the clean water is pumped by high pressure and the hole is cleaned by high pressure air, so that the cleanness of the hole is ensured.
Slowly pushing the anchor cable into the anchor hole 14 of the connecting section 1, strictly prohibiting up-down, left-right shaking, back-and-forth rotation and movement during pushing, avoiding midway jamming, ensuring that the depth of the anchor cable inserted into the hole is not less than 95% of the length of the anchor cable, and injecting cement paste into the anchor hole 14 in a secondary grouting mode after the insertion is completed. Stopping grouting after the grout flows out of the orifice for the first time, performing second grouting after the first grouting is initially set and the strength of the first grouting reaches 5Mpa, wherein the pressure of the second grouting is about 3.0Mpa, and stabilizing the pressure for two minutes after the grouting is finished so that the grouting strength meets the requirement.
Through a hoisting machine, a connecting section 1 is placed at one cross intersection of the foundation trench, an anchor cable penetrating through the anchor hole 14 is fixed on the side slope through a fastener, and a straight line section 2 is hoisted and lowered in four directions of the connecting section 1 simultaneously, so that the mortise 15 is matched and connected with the tenon 24. Then, another connecting section 1 is placed at the other end of each straight-line section 2, the connecting section 1 is also positioned at the cross intersection of the foundation trench, the mortise 15 on the connecting section 1 is matched and connected with the tenon 24 on the straight-line section 2, and the connecting section 1 is anchored on the side slope by penetrating an anchor cable through the anchor hole 14 in the same way; the process is repeated until the skeleton slope protection assembly is completed, the skeleton is adjusted, and the connecting section 1 and the straight line section 2 are in smooth and neat lap joint.
And fixedly connecting the second steel bar joint 23 on the straight section 2 with the first steel bar joint 13 at the corresponding position on the connecting section 1 by any one of welding, threaded joint connection and binding connection.
And (3) supporting a formwork at the joint of the connecting section 1 and the straight section 2, and pulling a wire at the upper opening of the formwork to ensure that the formwork is straight with the straight section 2 so as to ensure the quality of the formwork. And then pouring concrete at the joint, vibrating and changing the pouring at the same time to ensure the compactness of the poured concrete and ensure that the joint is as high as the surrounding framework, then covering a film for maintenance, and removing the mold after the concrete is cured. The assembled framework revetment after construction is shown in fig. 5.
Example 2
The difference between the embodiment 2 and the embodiment 1 is that the mortise 15 and the tenon 24 are not arranged at the connection position of the connecting section 1 and the straight section 2, and the first step surface 16 and the second step surface 25 are not present, as shown in fig. 4. When the straight line section 2 and the connecting section 1 are spliced, the positioning effect of the mortise 15 and the tenon 24 is avoided, the first steel bar joint 13 and the second steel bar joint 23 are directly fixedly connected in any one mode of welding, threaded joint connection or binding connection, the spliced structure is as shown in figure 3, and then concrete is poured on a formwork at the connecting part, so that the straight line section 2 and the connecting section 1 are connected into a whole.
In embodiment 2, the first reinforcement cage 11 is formed by fixedly connecting only eight main reinforcements and stirrups, and the second reinforcement cage 21 is formed by fixedly connecting only four main reinforcements and stirrups, so that fewer materials are used and the cost is lower; straightway 2 is simpler with linkage segment 1's structure, and processing is easier, and efficiency is higher, nevertheless because do not have mortise 15 and tenon 24's location and connection effect, can increase the degree of difficulty of piecing together straightway 2 and linkage segment 1 during the construction, and the intensity at the junction also can be relatively poor a little.

Claims (2)

1. The assembled framework slope protection is characterized by comprising a plurality of connecting sections (1) and a plurality of straight line sections (2) which are spliced with each other, wherein each connecting section (1) is cross-shaped and comprises a first reinforcing cage (11) which plays a supporting role inside and a first concrete layer (12) poured on the first reinforcing cage (11), a first reinforcing joint (13) extending out of the first concrete layer (12) is reserved on the front side surface of each of the first reinforcing cage (11) in four directions, and an anchor hole (14) penetrating through the connecting section (1) is formed in the connecting section; the straight line section (2) comprises a second steel reinforcement cage (21) with the inner part playing a supporting role and a second concrete layer (22) poured on the second steel reinforcement cage (21), second steel reinforcement joints (23) extending out of the second concrete layer (22) are reserved at two ends of the second steel reinforcement cage (21), and the second steel reinforcement joints (23) are connected with the first steel reinforcement joints (13);
a mortise (15) is further arranged on the side face of the connecting section (1) where the first steel bar joint (13) is located, and the mortise (15) is connected with tenons (24) arranged at two ends of the straight section (2) in a matched mode;
a first step surface (16) is arranged at the joint of the connecting section (1) and the straight line section (2), the first steel bar joint (13) is positioned at the upper part of the first step surface (16), and the mortise (15) is positioned at the lower part of the first step surface (16);
two ends of the straight line section (2) are provided with second step surfaces (25), the second steel bar joint (23) is positioned at the upper part of the second step surfaces (25), and the tenon (24) is positioned at the lower part of the second step surfaces (25); the interior of the straight line section (2) is of a hollow structure.
2. The construction method of the fabricated framework revetment according to claim 1, comprising:
step 1, prefabricating a connecting section (1) and a straight section (2) in a processing workshop,
the concrete method for prefabricating the connecting section (1) comprises the following steps:
the manufacturing method comprises the following steps that twelve main reinforcements are spliced into a cross, square stirrups are wound on the main reinforcements at intervals, the main reinforcements are clamped at right angles of the square stirrups, and the stirrups and the main reinforcements are fixedly connected in a binding or welding mode to complete machining of a first reinforcement cage (11); erecting a formwork around a first reinforcement cage (11), reserving a certain length for a main reinforcement at the formwork erecting position to serve as a first reinforcement joint (13), placing molds with corresponding structures at anchor holes (14), mortise holes (15) and a first step surface (16), pouring concrete, and removing the formwork after the concrete is dried and solidified;
the specific method for prefabricating the straight line segment (2) comprises the following steps:
six main reinforcements are arranged in parallel, square stirrups are wound on the main reinforcements at intervals, four main reinforcements are clamped at right angles of the square stirrups, the other two main reinforcements are positioned on a second step surface (25), the stirrups and the main reinforcements are fixedly connected in a binding or welding mode, the processing of a second reinforcement cage (21) is completed, a round steel pipe is fixed at the axis position of the second reinforcement cage (21) and the end is blocked, then a formwork is supported around the second reinforcement cage (21), after dies with corresponding structures are placed at the second step surface (25) and the tenon (24), concrete is poured, and after the concrete is dried and solidified, the formwork is removed;
then, transporting the finished products of the connecting section (1) and the straight section (2) to a construction site;
step 2, cleaning pumice or floating soil on the side slopes, filling pits, leveling and tamping platforms between adjacent levels of side slopes and reserving a one-way longitudinal slope; measuring according to design requirements to determine the position of a framework, lofting at a cross, excavating a framework foundation groove on a side slope by adopting a small machine tool in a manner of matching with manual excavation, performing replacement filling and tamping treatment on an unstable excavation foundation groove and a slope surface, excavating the same-level side slope from top to bottom, achieving one-step achievement, enabling the bottom of the groove to be dense and smooth, and forbidding overbreak;
step 3, adopting drilling equipment to form a hole below the bottom of the basic groove, wherein the depth of the formed hole is 0.5m longer than that of the designed anchor rod or anchor cable, and adopting high-pressure pumping clean water and high-pressure air to clean the hole; slowly pushing the anchor cable into the hole of the installation connecting section (1), strictly prohibiting up-down, left-right shaking, back-and-forth rotation and movement during pushing, avoiding midway blocking, inserting the anchor cable into the hole with the depth not less than 95% of the length of the anchor cable, injecting cement slurry into the hole after insertion is finished, stopping grouting after the slurry flows out of the hole opening, performing second grouting after the first grouting is initially set and the first grouting slurry strength reaches 5Mpa, wherein the second grouting pressure is about 3.0Mpa, and stabilizing the pressure for two minutes after grouting is finished, so that the grouting strength reaches the requirement;
through a hoisting machine, firstly, a connecting section (1) is placed at one cross intersection of the foundation grooves, an anchor cable penetrating through an anchor hole (14) is fixed on a side slope by using a fastener, and a straight line section (2) is hoisted and lowered simultaneously in four directions of the connecting section (1), so that a mortise (15) is matched and connected with a tenon (24); then, placing a connecting section (1) at the other end of each straight line section (2), wherein the connecting section (1) is also positioned at the cross intersection of the basic grooves, so that the mortise 15 on the connecting section (1) is matched and connected with the tenon (24) on the straight line section (2); repeating the processes until the assembly of the skeleton protection slope is completed, and adjusting the skeleton to enable the connection section (1) and the straight line section (2) to be smoothly and tidily lapped;
step 4, fixedly connecting a second steel bar joint (23) on the straight line section (2) with a first steel bar joint (13) at a corresponding position on the connecting section (1) by adopting any one of welding, threaded joint connection or binding connection;
step 5, a formwork is erected at the joint of the straight line section (2) and the connecting section (1), the upper opening of the formwork is pulled to enable the formwork to be straight with the straight line section (2), concrete is poured at the joint, pouring is carried out while vibrating, and the joint is enabled to be as high as the surrounding framework;
and 6, maintaining the cast-in-place concrete at the joint of the straight-line section (2) and the connecting section (1), and removing the mold after the concrete is cured.
CN201811363989.7A 2018-11-16 2018-11-16 Assembled framework slope protection and construction method thereof Active CN109487803B (en)

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CN110359452A (en) * 2019-06-18 2019-10-22 兰州理工大学 A kind of nodal-connection components, frame pre-stress cable bolting structure and construction method
CN110409529B (en) * 2019-07-08 2024-03-22 天津矿山工程有限公司 Chute and side slope meter cleaning device and use method thereof
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CN114991179A (en) * 2022-06-10 2022-09-02 南华大学 Prefabricated cross beam and prefabricated cross beam slope reinforcing structure and construction method
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