CN114086554A - Permanent temporary combined type ground anchor and establishing method thereof - Google Patents
Permanent temporary combined type ground anchor and establishing method thereof Download PDFInfo
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- CN114086554A CN114086554A CN202111442804.3A CN202111442804A CN114086554A CN 114086554 A CN114086554 A CN 114086554A CN 202111442804 A CN202111442804 A CN 202111442804A CN 114086554 A CN114086554 A CN 114086554A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/80—Ground anchors
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
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Abstract
The invention relates to the field of cable hanging ground anchors, in particular to a combined type ground anchor with a permanent and temporary combination function and an establishment method thereof. The combined type ground anchor is simple in construction method, provides stable rear anchoring force for the hoisting and hoisting cable, provides a ground anchor structure which is stable in structure and convenient to construct for mountain areas where temporary ground anchors are difficult to set, saves construction cost, shortens construction period, realizes the stability of the whole structure of the anchor structure, and ensures the safety of hoisting and hoisting.
Description
Technical Field
The invention relates to the field of cable crane ground anchors, in particular to a combined ground anchor with permanent and temporary combination and an establishing method thereof.
Background
The main types of the existing ground anchors are pile type ground anchors and gravity type ground anchors, and the existing ground anchors are mainly temporary structures designed for providing post-anchoring force in the construction process of large-scale hoisting and the like so as to ensure the safety in the hoisting and hoisting process.
In the construction of highways in mountainous areas, particularly in the construction of bridges such as arch bridges, suspension bridges, cable-stayed bridges and the like, ground anchors are required to be arranged to complete the construction of hoisting and hoisting, but the mountainous areas have steep gully and deep slopes, narrow working surfaces and harsh environmental requirements, cannot provide effective working surfaces, often do not have a space for newly building the ground anchors as temporary structures, and need to consume a large amount of manpower, material resources and time for the construction of the ground anchors, so that the construction cost of the bridges in the mountainous areas is high and the construction period is long.
Therefore, a technical scheme is urgently needed at present to solve the technical problems that the existing anchor in the mountainous area is difficult to set, stable rear anchoring force cannot be provided for hoisting and hoisting construction, and construction cost and construction period of the mountainous area are affected.
Disclosure of Invention
The invention aims to: aiming at the problems in the background technology, a combined earth anchor with permanent and temporary combination and an establishment method thereof are provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a face combination formula earth anchor that combines forever, includes anchorage structure and a plurality of prestressed anchorage cable, the anchorage structure includes the structure pile foundation, pre-buried a plurality of pipe fittings, a plurality of pre-buried pole and a plurality of pre-buried board in the anchorage structure, prestressed anchorage cable one end is passed connect in through supporting ground tackle anchor behind the pipe fitting the anchorage structure, the other end anchor is in the underground, pre-buried pole tip passes stretch out behind the pre-buried board the anchorage structure, pre-buried pole can dismantle the connection anchor adaptor, the anchor adaptor is used for connecting jack-up hoist and mount cable.
According to the combined ground anchor with the permanent structure, the prestressed anchor cables with the temporary structure are arranged on the pile foundation of the structure with the permanent structure in a matched mode to form a structural form of the ground anchor with the permanent structure, stable rear anchoring force is provided for the hoisting lifting cables, a ground anchor structure which is stable in structure and convenient to construct is provided for mountain areas with difficulty in arrangement of the temporary ground anchor, construction cost of building structures in the mountain areas is saved, construction period is shortened, meanwhile, due to the fact that the prestressed anchor cables and the hoisting lifting cables exert pulling forces in opposite directions relative to the anchor structure, the rear anchoring force of the prestressed anchor cables and the front pulling force of the hoisting lifting cables are mutually offset, the internal force value of the anchor structure is stable and is maintained at a small value, stability of the whole structure of the anchor structure is achieved, and meanwhile safety of hoisting is guaranteed.
As a preferred scheme of the invention, the anchor structure further comprises a bearing platform, the bearing platform is arranged at the top of the pile foundation, the pile foundation and the bearing platform are both reinforced concrete structural members, and the reinforcing steel bars of the pile foundation and the bearing platform are connected with each other. The cushion cap is used for raising the pile foundation height, increases the pre-buried region of all built-in fittings, ensures the pre-buried stability of all built-in fittings, simultaneously, the reinforcing bar interconnect of cushion cap and pile foundation can increase the overall stability and the anti load strength of pile foundation, provides more stable support for the structure.
In a preferred embodiment of the present invention, the structure is a bridge, the pile foundation is a bridge pile foundation, and the cap can be used to support an upper bridge pier. The combined ground anchor can be suitable for quickly and safely establishing and using a hoisting cable in the construction of bridges such as a mountain arch bridge, a suspension bridge and a cable-stayed bridge, the construction period of the bridge is shortened, and the corresponding cost is saved.
As a preferred scheme of the invention, the anchor structure is provided with an inclined side wall, the pre-buried plate is arranged on the inclined side wall, and the pre-stressed anchor cable is anchored to the inclined side wall, so that an included angle between the pre-stressed anchor cable and the pile foundation is larger than 0 degree and smaller than 90 degrees. The prestressed anchor cable is installed in an inclined mode, can be anchored on a slope surface of a mountain area close to an anchorage structure easily, the embedded plate is arranged in an inclined mode, the prestressed anchor cable can adapt to the stretching and supporting direction of the hoisting and hoisting cable, the force application direction of the prestressed anchor cable and the force application direction of the hoisting and hoisting cable can be close, the maximum offset of the rear anchoring force of the prestressed anchor cable and the front tension of the hoisting and hoisting cable is achieved, and the integral stability of a pile foundation part of a structure is further guaranteed.
As a preferable scheme of the invention, the anchoring end of the prestressed anchor cable and the anchoring end of the hoisting cable are arranged on the inclined side wall in a staggered and zoned manner. The anchoring ends of the prestressed anchor cables and the anchoring ends of the hoisting cables are respectively arranged in an array mode and then are arranged in a staggered mode, so that the stress of the bearing platform stress surface is uniform, and the structural stability of the bearing platform is guaranteed.
As a preferred scheme of the invention, the embedded rods are sleeved with sleeves, the sleeves and the embedded rods are fixed through cement paste, and the adjacent sleeves are communicated through communicating pipes. Make pre-buried pole receive sheathed tube protection, increase pre-buried pole's bulk strength and life, can realize that the grout in space between many sleeve pipes and the pre-buried pole is filled entirely through certain pressure.
As a preferable scheme of the invention, at least one spiral rib is sleeved on the sleeve, and the spiral rib is positioned on one side of the embedded rod far away from the embedded plate and close to an anchoring base plate matched with the end part of the embedded rod. The spiral rib is used for increasing the strength of the embedded rod, improving the stability of the embedded rod in the tensioning process, increasing the contact surface of the embedded rod and the anchor structure during forming and ensuring the embedded stability of the embedded rod.
According to the preferable scheme, the pipe fitting is a steel pipe, the embedded rod is finish-rolled deformed steel bar, and the sleeve is a corrugated pipe.
As a preferable scheme of the invention, the anchoring adapter comprises an anchoring end, a buckling rope steering member and a buckling rope anchoring member which are sequentially connected, the anchoring end is rotatably connected with the buckling rope steering member, the buckling rope steering member is rotatably connected with the buckling rope anchoring member, and the buckling rope anchoring member is used for connecting the hoisting rope.
As a preferred scheme of the invention, a plurality of reinforcing mesh pieces are arranged in the anchor structure behind the embedded plate, and the reinforcing mesh pieces are arranged in parallel with the embedded plate. The overall stability of the anchorage structure is further improved, and the pre-buried anchorage stability of all the pre-buried parts and the anchorage structure is improved.
A method for establishing a permanent temporary combined ground anchor comprises the following steps: s1: according to the hoisting weight, calculating the tensile force born by the anchorage structure to obtain the number of anchoring ends of the hoisting rope on the anchorage structure; s2: combining S1, obtaining the number of anchoring ends of the prestressed anchor cable on the anchorage structure according to the rated tension value of a single prestressed anchor cable; s3: combining S2, preparing pre-buried plates and pre-buried rods, wherein each pre-buried plate is provided with a plurality of anchoring holes, and each anchoring hole is internally provided with one pre-buried rod; s4: binding a reinforcement cage, namely embedding and binding the pre-embedded plate and the pipe joint in the reinforcement cage in advance, so that the anchoring end of the prestressed anchor cable and the anchoring end of the hoisting and hoisting cable can be arranged in a staggered and partitioned manner; s5: simulating a tensioning process of a hoisting cable and a prestressed anchor cable by adopting a numerical simulation and/or theoretical analysis method to obtain an optimal tensioning process; s6: and pouring concrete, forming an anchor structure, and performing prestress tensioning on the prestress anchor cable according to an optimal tensioning procedure obtained in S5 after the strength of the anchor structure reaches a set value.
The building method of the permanently temporary combined ground anchor adopts the structure pile foundation with the permanent structure to be matched with the prestressed anchor cable with the temporary structure to form the permanently temporary combined ground anchor structure in a combined mode, is simple in construction method, saves construction cost of building in mountain areas, shortens construction period, meanwhile, adopts a pre-simulation tensioning procedure to obtain an optimal tensioning procedure, enables the tensioning procedure of the prestressed anchor cable to be matched with an actual hoisting sequence, and guarantees the safety of hoisting while achieving the stability of the integral structure of the anchor structure.
In the preferred scheme of the invention, in S4, the embedded rods are anchored in the reinforcement cage through matched anchoring backing plates and are limited through steel wires.
As a preferable embodiment of the present invention, S4 further includes the step of sleeving a sleeve on the embedded rod, sleeving a spiral rib on the sleeve, and filling cement slurry into the sleeve by pressure injection.
In summary, due to the adoption of the technical scheme, the permanently and temporarily combined ground anchor has the beneficial effects that:
1. the prestressed anchor cables of the temporary structure are arranged on the pile foundation of the permanent structure in a matched mode, a permanently-temporary combined ground anchor mode is formed in a combined mode, stable rear anchoring force is provided for hoisting and hoisting cables, a ground anchor structure which is stable in structure and convenient to construct is provided for mountain areas where the temporary ground anchors are difficult to arrange, construction cost of building structures in the mountain areas is saved, and construction period is shortened;
2. because the prestressed anchor cable and the hoisting cable exert tension forces in opposite directions relative to the anchor structure, the rear anchoring force of the prestressed anchor cable and the front tension force of the hoisting cable are mutually offset, so that the internal force value of the anchor structure is stable and is maintained at a small value, the stability of the whole structure of the anchor structure is realized, and the safety of hoisting is ensured;
the method for establishing the permanent temporary combined ground anchor has the advantages that:
1. the pile foundation of the structure with the permanent structure is matched with the prestressed anchor cable with the temporary structure to form a permanently-temporary combined ground anchor structure, the construction method is simple, the construction cost of the structure in the mountainous area is saved, and the construction period is shortened;
2. the optimal tensioning process obtained by pre-simulating the tensioning process is adopted, so that the tensioning process of the prestressed anchor cable is adapted to the actual hoisting sequence, the stability of the whole structure of the anchorage structure is realized, and the safety of hoisting is ensured.
Drawings
FIG. 1 is a schematic structural view of a permanently and temporarily combined modular earth anchor of the present invention;
FIG. 2 is a schematic diagram of the structure of the partial method at A in FIG. 1;
FIG. 3 is a schematic diagram of the structure of the partial method at B in FIG. 1;
FIG. 4 is a schematic view of the structure of the sloped side wall in example 1;
fig. 5 is a state diagram of the combined earth anchor of embodiment 1 in a permanent and temporary combination;
fig. 6 is a schematic diagram of the pre-burying position of the pipe in embodiment 1;
FIG. 7 is an elevation view of the anchor adapter of embodiment 1;
FIG. 8 is a side view of the anchor adapter of embodiment 1;
FIG. 9 is a schematic view of the construction of the anchor head described in example 1.
Icon:
the method comprises the following steps of 1-an anchorage structure, 11-a pile foundation, 12-a bearing platform, 13-an inclined side wall, 2-a prestressed anchor cable, 3-a pipe fitting, 4-an embedded rod, 5-an embedded plate, 6-a hoisting and hoisting cable, 7-an anchoring adapter, 71-an anchoring end, 72-a buckling cable steering piece, 73-a buckling cable anchoring piece, 8-a sleeve, 9-a communicating pipe, 10-a spiral rib and 20-a reinforcing mesh piece.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-9, a permanently-bonded combined ground anchor of this embodiment is a combined ground anchor, which is set in the construction of a bridge in a mountain area, and includes an anchor structure 1 and a plurality of prestressed anchor cables 2, as shown in fig. 4, the anchor structure 1 includes a bridge pile foundation 11 and a bearing platform 12, the bearing platform 12 is set on the top of the pile foundation 11 and can directly bear an upper bridge pier, the pile foundation 11 and the bearing platform 12 are both reinforced concrete structural members, and the reinforcing steel bars thereof are connected with each other, during the binding process of the reinforcement cages of the pile foundation 11 and the bearing platform 12, the pipe 3, the embedded rod 4 and the embedded plate 5 are embedded, the embedded plate 5 is located on one side of the anchor structure 1 close to the hoisting cable 6, one end of each prestressed anchor cable 2 is anchored on the bearing platform 12 through a matched anchorage after passing through the pipe 3, the other end is anchored underground, one end of each embedded rod 4 is located in the anchor structure 1, the other end of each embedded plate 5 extends out of the anchor structure 1 and is connected with an anchor adaptor 7, the anchor adaptor 7 is used for connecting the hoisting cable 6.
Specifically, according to actual conditions, the pile foundation 11 and the reinforcement part of the pile foundation 12 can be integrally formed by binding and then integrally formed by pouring, or the construction of the pile foundation 12 is performed at the top of the pile foundation 11 after the construction is completed, and the reinforcement part of the pile foundation 12 is connected with the reinforcement part of the pile foundation 11.
Specifically, the bearing platform 12 can occupy part of the top surface of the pile foundation 11, and can also be used as a component of the pile foundation 11, so as to simultaneously bear the upper bridge framework with the pile foundation 11, as shown in fig. 5, in this embodiment, the top of the bearing platform 12 can directly bear the upper bridge pier stud.
Specifically, as shown in fig. 1 and 4, in this embodiment, the bearing platform 12 is in a shape of a truncated pyramid with a small top and a large bottom, one side wall of the side surface of the truncated pyramid faces the tensioning direction of the hoisting and hoisting cable 6, and is used for forming an inclined side wall 13, the embedded plate 5 is installed in the bearing platform 12 corresponding to the inclined side wall 13 in a pre-embedded manner, the prestressed anchor cable 2 is anchored on the anchor structure 1 on the inclined side wall 13, the other end of the prestressed anchor cable 2 is anchored on a hill near the anchor structure 1, the tensioning direction of the prestressed anchor cable 2 and the hoisting and hoisting cable 6 is close to 180 degrees, the rear anchoring force of the prestressed anchor cable 2 and the front tension of the hoisting and hoisting cable 6 can be counteracted to the greatest extent, the stability of the anchor structure 1 is ensured, and the safety of hoisting and hoisting is ensured.
Specifically, as shown in fig. 4, on the inclined side wall 13, the anchoring end of the prestressed anchor cable 2 and the anchoring end of the hoisting cable 6 (i.e., the installation position of the anchoring adaptor 7, i.e., the embedded position of the embedded plate 5) are arranged in a staggered and zoned manner, so that the inclined side wall 13 of the bearing platform 12 is uniformly stressed, and the stability of the anchor structure 1 is further ensured.
Specifically, as shown in fig. 1 to 6, in this embodiment, the pipe fitting 3 is a steel pipe, obliquely penetrates through the anchor structure 1, and is consistent with the tensioning direction of the prestressed anchor cable 2, preferably, the included angle between the steel pipe and the pile foundation 11 is 30 ° to 60 °, and the steel pipe is embedded in the reinforcement cage binding preparation process of the anchor structure 1 according to the number of layers of the prestressed anchor cable 2 in the height direction of the pile foundation 11 and the arrangement number of each layer; the embedded rod 4 is finish-rolled deformed steel bar, one end of the finish-rolled deformed steel bar, which is far away from the embedded plate 5, is provided with a conventional anchorage device containing an anchoring base plate, and the finish-rolled deformed steel bar is anchored in a reinforcement cage of the anchorage structure 1 through the anchorage device, and the extension direction of the finish-rolled deformed steel bar is close to the stretching direction of the prestressed anchor cable 2; the pre-embedded plate 5 is a steel plate, and is preset with a plurality of anchoring holes for penetrating finish-rolled deformed steel bars; the bellows is established as sleeve pipe 8 to the finish rolling screw-thread steel overcoat, and the bellows overcoat is established spiral muscle 10 and is strengthened, and spiral muscle 10 is located one side that finish rolling screw-thread steel anchor backing plate is close to built-in panel 5, with the laminating of finish rolling screw-thread steel anchor backing plate, and the bellows of adjacent finish rolling screw-thread steel passes through the communicating pipe 9 intercommunication of bellows, and the water injection mud is irritated at the positive pressure between the sleeve pipe 8 of finish rolling screw-thread steel and bellows and is connected fixedly.
Specifically, in this embodiment, the embedded rod 4 is PSB930 finish-rolled deformed steel bar with a diameter of 32mm, the plastic corrugated pipe with an inner diameter of 50mm is integrally sleeved outside the embedded rod, one end of the finish-rolled deformed steel bar, which is located in the anchor structure 1, is connected with a YGM-32 type anchorage device with an anchoring backing plate in a matching manner, a reinforcing spiral rib 10 with a diameter of 16mm is sleeved at a position close to the anchoring backing plate, and cement grouting is poured between the finish-rolled deformed steel bar and the corrugated pipe.
Preferably, in the reinforcement cage binding process of the anchor structure 1, a plurality of reinforcement meshes 20 are lined and bound in the anchor structure 1 behind the embedded plate 5, and the reinforcement meshes 20 are arranged in parallel with the embedded plate 5.
Preferably, as shown in fig. 7-9, the anchoring adaptor 7 includes an anchoring end 71, the anchoring end 71 is rotatably connected with a buckling cable steering member 72 through a pin, the buckling cable steering member 72 is rotatably connected with a buckling cable anchoring member 73 through another pin, the buckling cable anchoring member 73 is used for connecting the hoisting cable 6, wherein, as shown in fig. 8, a plurality of through holes are arranged on the anchoring end 71 corresponding to the embedded plate 5 for penetrating out of the finish-rolled deformed steel bar.
In the combined ground anchor with the permanent structure, the prestressed anchor cable 2 with the temporary structure is arranged on the bridge anchor structure 1 with the permanent structure in a matched manner, the anchoring end of the prestressed anchor cable 2 and the anchoring end of the hoisting and hoisting cable 6 are arranged on the inclined side wall 13 of the anchor structure 1 in a staggered and partitioned manner to form a ground anchor form with the permanent structure, so that the ground anchor structure with stable structure and convenient construction is provided for hoisting and hoisting in bridge construction of arch bridges, suspension bridges, cable-stayed bridges and the like in mountainous areas, the construction cost of construction structures in mountainous areas is saved, the construction period is shortened, meanwhile, the rear anchoring force direction of the prestressed anchor cable 2 is close to 180 degrees with the front tension direction of the hoisting cable 6, so that the prestressed anchor cable 2 and the hoisting and hoisting cable 6 exert tension in opposite directions relative to the anchor structure 1, the rear anchoring force of the prestressed anchor cable 2 and the front tension of the hoisting and hoisting cable 6 are mutually offset, the stability of the whole structure of the anchorage structure 1 is realized, and the safety of hoisting is ensured.
Example 2
The method for establishing the permanently temporary combined ground anchor as in embodiment 1 comprises the following steps:
s1: and according to the hoisting weight, calculating the tensile force born by the anchor structure to obtain the number of anchoring ends of the hoisting cable 6 on the anchor structure 1.
Specifically, the hoisting weight can be obtained according to a component to be hoisted in engineering construction and according to design drawings and experience before construction, the number of hoisting cables 6 can be obtained according to the hoisting weight, the tensioning angle of the hoisting cables 6 is matched, and the stress condition of the anchor structure 1 in the using process is obtained through stress analysis.
S2: and combining S1, obtaining the number of anchoring ends of the prestressed anchor cable 2 on the anchorage structure 1 according to the rated tension value of the single prestressed anchor cable 2.
Specifically, in this embodiment, the anchoring holes in the embedded plate 5 are arranged in a matrix array manner, and a plurality of finish rolling deformed steel bars can penetrate through the anchoring holes, so that the anchoring adaptor 7 can be installed according to the tension supporting condition of the hoisting cable 6, and meanwhile, the number of the prestressed anchor cables 2 can be calculated according to the rated tension value of a single prestressed anchor cable 2 and the stress condition of the anchor structure 1, so that the prestress of the prestressed anchor cable 2 can sufficiently offset the tension applied to the anchor structure 1 in the hoisting process, the safety storage requirement is met, and the safety of hoisting is ensured.
S3: and (S2) preparing pre-buried plates 5 and pre-buried rods 4, wherein each pre-buried plate 5 is provided with a plurality of anchoring holes, and each anchoring hole is internally provided with a finish-rolled deformed steel bar.
S4: and (3) binding a reinforcement cage, namely embedding and binding the embedded plate 5 and the pipe joint 3 in the reinforcement cage in advance, so that the anchoring end of the prestressed anchor cable 2 and the anchoring end of the hoisting cable 6 can be arranged in a staggered and partitioned manner.
Specifically, after the prestressed anchor cable 2 is fixed on the slope of a mountain area in cooperation with the tensioning direction of the hoisting cable 6, the position, the azimuth angle, the inclination angle and other parameters of the prestressed anchor cable 2 relative to the anchor structure 1 can be determined, steel pipes are embedded in a reinforcement cage according to the known parameters to serve as channels for construction and installation of the prestressed anchor cable 2, and steel plates are arranged in a staggered and partitioned mode to serve as the anchoring end connecting position of the hoisting cable 6.
Specifically, at the pre-buried in-process of pipe fitting 3, steel sheet, finish rolling screw-thread steel carries on spacingly through the steel wire through supporting ground tackle anchor in steel reinforcement cage, and the sleeve pipe 8 of bellows is established to the cover on the finish rolling screw-thread steel, and the position cover that is close to the anchor backing plate on sleeve pipe 8 establishes spiral muscle 10, presses the injection in sleeve pipe 8 and packs aqueous slurry.
S5: and simulating the tensioning process of the hoisting cable 6 and the prestressed anchor cable 1 by adopting a numerical simulation and/or theoretical analysis method to obtain an optimal tensioning process.
Specifically, in the construction of bridges such as an arch bridge, a suspension bridge and a cable-stayed bridge, the hoisting and hoisting sequence is often staged, and the tension applied to the anchor structure 1 is performed step by step, so that the means of numerical simulation and theoretical analysis is adopted to simulate the actual process, the factors such as the stress condition and the construction convenience of the anchor structure 1 are integrated, and the optimal tensioning process most suitable for the current construction environment can be obtained by comparison, so that the site construction is guided, the tensioning process of the hoisting tension and the prestress of the anchor cable is scientifically and reasonably designed, and the internal force of the permanent structures such as the bearing platform 12 and the pile foundation 11 is ensured to be reasonable so as not to be damaged.
S6: and pouring concrete, forming the anchor structure 1, and performing prestress tensioning on the prestress anchor cable 2 according to an optimal tensioning procedure obtained in S5 after the strength of the anchor structure 1 reaches a set value.
According to the method for establishing the combined ground anchor with the permanent temporary structure, the structure pile foundation 11 with the permanent structure is matched with the prestressed anchor cable 2 with the temporary structure to form the combined ground anchor structure with the permanent temporary structure in a combined mode, the construction method is simple, the construction cost of building structures in mountain areas is saved, the construction period is shortened, meanwhile, the preferable tensioning process is obtained by adopting the pre-simulation tensioning process, the tensioning process of the prestressed anchor cable 2 is made to be adaptive to the actual hoisting and hoisting sequence, and the safety of hoisting and hoisting is guaranteed while the stability of the integral structure of the anchor structure 1 is achieved.
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 invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The combined ground anchor is characterized by comprising an anchor structure (1) and a plurality of prestressed anchor cables (2), wherein the anchor structure (1) comprises a structure pile foundation (11), a plurality of pipe fittings (3), a plurality of embedded rods (4) and a plurality of embedded plates (5) are embedded in the anchor structure (1), one end of each prestressed anchor cable (2) penetrates through the corresponding anchor in the pipe fitting (3) and then is anchored in the anchor structure (1), the other end of each prestressed anchor cable is anchored in the ground, the end part of each embedded rod (4) penetrates through the corresponding embedded plate (5) and then extends out of the anchor structure (1), each embedded rod (4) can be detachably connected with an anchor adapter (7), and each anchor adapter (7) is used for connecting a hoisting and hoisting cable (6).
2. A permanently and temporarily combined ground anchor as claimed in claim 1, wherein said anchor structure (1) further comprises a bearing platform (12), said bearing platform (12) is arranged on top of said pile foundation (11), said pile foundation (11) and said bearing platform (12) are both reinforced concrete structural members, and the steel bars of said pile foundation (11) and said bearing platform (12) are connected with each other.
3. The combined temporary-connection ground anchor as claimed in claim 2, wherein the anchor structure (1) is provided with an inclined side wall (13), the pre-buried plate (5) is arranged on the inclined side wall (13), and the prestressed anchor cable (2) is anchored to the inclined side wall (13) so that the included angle between the prestressed anchor cable (2) and the pile foundation (21) is greater than 0 ° and smaller than 90 °.
4. A permanently temporary combined ground anchor as claimed in claim 3, wherein the anchoring end of said prestressed anchorage cable (2) and the anchoring end of said hoisting cable (6) are arranged in a staggered zone-by-zone arrangement on said inclined side wall (13).
5. The combined ground anchor as claimed in claim 1, wherein the embedded rod (4) is sleeved with a sleeve (8), the sleeve (18) and the embedded rod (4) are fixed by cement paste, and the adjacent sleeves (8) are communicated by a communicating pipe (9).
6. The combined ground anchor as claimed in claim 5, wherein the sleeve (8) is sleeved with at least one spiral rib (10), and the spiral rib (10) is located on one side of the embedded rod (4) far away from the embedded plate (5) and close to an anchoring backing plate matched with the end of the embedded rod (4).
7. The permanently and temporarily combined ground anchor as claimed in claim 5, wherein said pipe member (3) is a steel pipe, said embedded rod (4) is a finish-rolled deformed steel bar, and said sleeve (8) is a corrugated pipe.
8. A permanently temporary combined ground anchor as claimed in claim 1, characterized in that said anchor adaptor (7) comprises an anchor head (71), a lanyard steering member (72) and a lanyard anchor member (73) connected in sequence, said anchor head (71) is rotatably connected with the lanyard steering member (72), said lanyard steering member (72) is rotatably connected with the lanyard anchor member (73), and said lanyard anchor member (73) is used for connecting said hoisting cable (6).
9. The combined ground anchor of claim 1, wherein a plurality of steel mesh sheets (20) are arranged in the anchor structure (1) behind the pre-buried plate (5), and the steel mesh sheets (20) are arranged in parallel with the pre-buried plate (5).
10. A method of establishing a permanently temporarily combined modular earth anchor as claimed in any one of claims 1 to 9, comprising the steps of:
s1: according to the hoisting weight, calculating the tensile force borne by the anchorage structure (1) to obtain the number of anchoring ends of the hoisting rope on the anchorage structure (1);
s2: combining S1, obtaining the number of anchoring ends of the prestressed anchor cable (2) on the anchorage structure (1) according to the rated tension value of the single prestressed anchor cable (2);
s3: combining S2, preparing pre-buried plates (5) and pre-buried rods (4), wherein each pre-buried plate (5) is provided with a plurality of anchoring holes, and each anchoring hole is internally provided with one pre-buried rod (4);
s4: binding a reinforcement cage, namely embedding and binding an embedded plate (5) and a pipe joint (3) in the reinforcement cage in advance, so that the anchoring end of the prestressed anchor cable (2) and the anchoring end of the hoisting and hoisting cable (6) can be arranged in a staggered and partitioned manner;
s5: simulating a tensioning process of a hoisting cable (6) and a prestressed anchor cable (2) by adopting a numerical simulation and/or theoretical analysis method to obtain an optimal tensioning process;
s6: and pouring concrete, forming the anchor structure (1), and performing prestress tensioning on the prestress anchor cable (2) according to an optimal tensioning process obtained in S5 after the strength of the anchor structure (1) reaches a set value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111442804.3A CN114086554A (en) | 2021-11-30 | 2021-11-30 | Permanent temporary combined type ground anchor and establishing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419104A (en) * | 2022-09-25 | 2022-12-02 | 贵州路桥集团有限公司 | Cable crane combined type anchorage structure and using method thereof |
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| CN204266121U (en) * | 2014-11-12 | 2015-04-15 | 中铁十八局集团有限公司 | Button anchor system combinations formula pile foundation support table anchorage |
| CN108867376A (en) * | 2018-06-14 | 2018-11-23 | 张学武 | Face anchor system and its construction method after mating type forever |
| DE202018105605U1 (en) * | 2018-09-28 | 2018-11-26 | Dominik Steiger | Bridge edge system |
| CN111485493A (en) * | 2020-03-25 | 2020-08-04 | 中国电建集团中南勘测设计研究院有限公司 | Suspension bridge anchorage structure and implementation method thereof |
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| CN204266121U (en) * | 2014-11-12 | 2015-04-15 | 中铁十八局集团有限公司 | Button anchor system combinations formula pile foundation support table anchorage |
| CN108867376A (en) * | 2018-06-14 | 2018-11-23 | 张学武 | Face anchor system and its construction method after mating type forever |
| DE202018105605U1 (en) * | 2018-09-28 | 2018-11-26 | Dominik Steiger | Bridge edge system |
| CN111485493A (en) * | 2020-03-25 | 2020-08-04 | 中国电建集团中南勘测设计研究院有限公司 | Suspension bridge anchorage structure and implementation method thereof |
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| CN115419104A (en) * | 2022-09-25 | 2022-12-02 | 贵州路桥集团有限公司 | Cable crane combined type anchorage structure and using method thereof |
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