CN213925867U - Suspension bridge main cable anchoring system under bedrock deep-buried condition - Google Patents

Abstract

The utility model provides a suspension bridge main cable anchoring system under the condition of bedrock deep burying, which is provided with an anchor chamber and an anchor cable; an anchor wall is positioned on the anchor chamber; the anchor chamber is positioned on the foundation through a pile foundation; the lower end of the anchor cable is anchored in the rock body, and the upper end of the anchor cable is anchored on the anchor wall; the lower end of the main cable evenly anchors the cable strands on the anchor wall after dispersing the cable strands and is respectively arranged corresponding to the anchor cables. By adopting the anchor chamber and the anchor cable, the anchor cable is butted with the strand of the cable to directly bear the tension of the cable, so that the structure is more reasonable in stress, and is safer and more reliable; the whole anchoring system is simple in structure and convenient to construct, can be suitable for various geological and topographic conditions, can be used as a foundation project of an anchorage, and is more convenient and rapid to construct when rocks on the surface are exposed; the method can greatly reduce the consumption of materials and energy, has small influence on the environment by construction, accords with the development direction of green environmental protection, has better social, economic and environmental benefits, has good market prospect, and is suitable for wide popularization.

Description

Suspension bridge main cable anchoring system under bedrock deep-buried condition

Technical Field

The utility model relates to a construction technical field, concretely relates to suspension bridge main push-towing rope anchor system under basement rock deep buried condition.

Background

In a suspension bridge, an anchor is a structure for anchoring a main cable, and transmits the tension in the main cable to a foundation. The anchorage generally adopts a gravity type structure, and when the shallow layers of the earth surfaces at the two ends of the bridge have natural, complete and firm rock masses, the tunnel type anchorage can be adopted. The gravity type anchorage is a huge structure, generally needs to be provided with deep foundations such as open caisson, pile and pipe column, needs to consume a large amount of steel and concrete, and has the disadvantages of complex construction process, long construction period and great influence on the surrounding environment. Therefore, a main cable anchoring system of the suspension bridge under the condition of bedrock deep burying is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a suspension bridge main push-towing rope anchor system under basement rock deep buried condition, the volume that gravity type anchorage exists that will solve the present stage is big, and the construction is complicated, the period is long and to the great technical problem of environmental impact.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a suspension bridge main cable anchoring system under a bedrock deep-burying condition comprises an anchor chamber and an anchor cable; an anchor wall is positioned on the anchor chamber; the anchor chamber is positioned on the foundation through a pile foundation; the lower end of the anchor cable is anchored in a rock body, and the upper end of the anchor cable is anchored on the anchor wall; the lower end of the main cable uniformly anchors the cable strands on the anchor wall after dispersing the cable strands and is respectively arranged corresponding to the anchor cables.

As a further improvement, the anchor wall is internally provided with a plurality of layers of shear-resistant steel plates.

As a further improvement of the utility model, the lower end of the main cable disperses the cable strand into a plurality of single cable bodies through the cable-dispersing saddle; the single cable bodies are respectively anchored on the anchor walls.

As a further improvement of the present invention, the anchor cable comprises an anchor cable anchoring end, a steel strand and a tensioning end which are connected in sequence; the anchor end of the anchor cable is anchored in the rock body, and the steel strand penetrates through the rock body and the anchor wall and then is connected with the tensioning end; the tensioning end is tightly abutted to one side of the anchor wall and used for tensioning the anchor cable.

As a further improvement, the periphery of the anchor cable anchoring end is provided with a fusiform protective cover, and the outer end of the protective cover is provided with a grout outlet.

As a further improvement of the utility model, a protective sleeve is also arranged; the protective sleeve is sleeved on the steel strand.

As a further improvement of the utility model, the outer end of the grouting pipe passes through the protective sleeve and the protective cover and extends inwards; and (4) penetrating the anchor cable into the anchor cable hole from the ground surface anchor chamber.

As a further improvement of the utility model, one end of the single cable body is also provided with a main cable anchoring end, and the other end is connected with the main cable through a cable-spreading saddle; the main cable anchoring end is tightly abutted to the other side of the anchor wall and used for tensioning the single cable body.

Compared with the prior art, the beneficial effects of the utility model are that:

compared with the traditional gravity type anchorage, the gravity type anchorage has the advantages that the anchorage chamber and the anchor cable are adopted, the anchor cable is in butt joint with the strand of the cable to directly bear the tensile force of the cable, and the gravity type anchorage is more reasonable in structural stress, safer and more reliable; the whole anchoring system is simple in structure and convenient to construct, can be suitable for various geological and topographic conditions, can be used as a foundation project of an anchorage, and is more convenient and rapid to construct when rocks on the surface are exposed; the method can greatly reduce the consumption of materials and energy, has small influence on the environment by construction, accords with the development direction of green environmental protection, has better social, economic and environmental benefits, has good market prospect, and is suitable for wide popularization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some 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 structural view of the present invention;

FIG. 2 is a schematic view of the structure of the portion C in FIG. 1;

fig. 3 is a schematic view of the anchor end structure of the anchor cable of the present invention;

fig. 4 is a top view of the present invention;

fig. 5 is a sectional view of the utility model taken along line a-B;

fig. 6 is a schematic structural view of an anchor cable tensioning end of the present invention;

fig. 7 is a schematic view of the distribution of the anchor cable burying hole sites of the present invention;

fig. 8 is a schematic structural view of a shear steel plate according to the present invention;

fig. 9 is a top view of the anchoring point of the present invention;

the reference numbers in the figures illustrate:

1. an anchor chamber; 11. anchoring walls; 111. shear resistant steel plates; 2. an anchor cable; 21. an anchor cable anchoring end; 22. steel strand wires; 23. tensioning the end; 24. a protective cover; 3. a pile foundation; 4. a foundation; 5. a rock mass; 6. a main cable; 61. a single cable body; 611. a main cable anchoring end; 7. a cable saddle; 8. a protective sleeve; 9. a grouting pipe; 10. an anchor cable duct; 20. and (5) earth surface anchor cable blocks.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Combine attached figure 1 to fig. 9, the utility model provides a suspension bridge main push-towing rope anchor system under basement rock deep buried condition, the volume that gravity type anchorage exists that will solve the present stage is big, and the construction is complicated, the period of time and to the great technical problem of environmental impact.

Specifically, the suspension bridge main cable anchoring system under the bedrock deep burying condition comprises an anchor chamber 1 and an anchor cable 2; an anchor wall 11 is positioned on the anchor chamber 1; the anchor chamber 1 is positioned on a foundation 4 through a pile foundation 3; the lower end of the anchor cable 2 is anchored in the rock body 5, and the upper end of the anchor cable is anchored on the anchor wall 11; the lower end of the main cable 6 evenly anchors the cable strands on the anchor wall 11 after dispersing the cable strands, and the cable strands are respectively arranged corresponding to the anchor cables 2.

Compared with the traditional gravity type anchorage, the gravity type anchorage has the advantages that the anchorage chamber 1 and the anchor cable 2 are adopted, the anchor cable 2 is in butt joint with the strand of the cable to directly bear the tensile force of the cable, and the structure is more reasonable in stress and safer and more reliable; the whole anchoring system is simple in structure and convenient to construct, can be suitable for various geological and topographic conditions, can be used as a foundation project of an anchorage, and is more convenient and rapid to construct when rocks on the surface are exposed; the method can greatly reduce the consumption of materials and energy, has small influence on the environment by construction, accords with the development direction of green environmental protection, has better social, economic and environmental benefits, has good market prospect, and is suitable for wide popularization.

Further, the anchor chamber 1 is of a reinforced concrete structure and mainly bears the anchoring internal force and the unbalanced component force of the main cable 6 and the anchor cable 2, and the anchor chamber 1 does not need huge dead weight and large-scale foundation engineering because the pulling force of the main cable 6 is mainly borne by the anchor cable 2. An anchor wall 11 is arranged in the anchor chamber 1 and used for transmitting the tension of the main cable 6 to the corresponding anchor cable 2; the anchor wall 11 is internally provided with a plurality of layers of shear steel plates 111 to meet the requirement of shear strength. The anchor chamber 1 can be used as a foundation of a bridge side pier or an approach bridge, and the construction of the anchor chamber 1 is carried out according to a common reinforced concrete structure mode.

Further, a cable scattering saddle 7 is positioned on the anchor chamber 1; the lower end of the main cable 6 disperses the cable strands into a plurality of single cable bodies 61 through a cable dispersing saddle 7; the single cable bodies 61 are respectively anchored to the anchor wall 11.

Further, the pile foundations 3 are uniformly arranged below the anchor chamber 1, and are used for positioning the whole anchor chamber 1.

Further, the anchor cable 2 comprises an anchor cable anchoring end 21, a steel strand 22 and a tensioning end 23 which are connected in sequence; the anchor cable anchoring end 21 is anchored in the rock body 5, and the steel strand 22 penetrates through the rock body 5 and the anchor wall 11 and then is connected with the tensioning end 23; the tensioning end 23 is tightly abutted to one side of the anchor wall 11, and is used for tensioning the anchor cable 2.

Further, the anchor cable 2 is made of prestressed steel strands (or prestressed steel wires) with protective materials on the surfaces, and the prestressed steel strands (or the prestressed steel wires) are blanked according to a determined length and are woven into a bundle. The lower end of the anchor cable 2 is anchored on a stainless steel plate to form an anchoring end structure.

Further, a protective cover 24 is further disposed on the anchor cable anchoring end 21.

Preferably, a spindle-shaped protective cover 24 is arranged at the periphery of the anchor cable anchoring end 21, and a grout outlet is arranged at the outer end of the protective cover 24; the anchoring end can also be designed as a spindle-shaped permanent anchoring device by providing an open design at the outer end of the protective cover 24.

Furthermore, a protective sleeve 8 is also arranged; the protective sleeve 8 is sleeved on the steel strand 22; when the anchor cable is used specifically, the anchor cable duct 10 is drilled by directional drilling equipment along the spatial position designed and distributed on the anchor cable 2 until the anchoring section of the anchor cable 2 (the anchoring section is arranged in the depth of the rock body 5 and is determined according to the anchoring force required by the anchor cable 2), the duct is expanded at the anchor end position, and a protective sleeve 8 (such as a pvc pipe) is preset in the anchor cable duct 10 of the covering layer so as to protect the anchor cable 2 and the anchor cable duct 10.

Furthermore, the outer end of a grouting pipe 9 penetrates through the protective sleeve 8 and the protective cover 24 and extends inwards; and (3) penetrating the anchor cable 2 into the anchor cable hole 10 from the ground surface anchor chamber 1, and placing the anchoring end on the anchoring section. The anchor cable 2 is anchored in the hard rock mass 5 by pressure-injecting fine aggregate concrete into the anchoring end through a grouting pipe 9 provided along with the anchor cable 2. The upper end of the anchor cable 2 is introduced into the anchor chamber 1 and is anchored in advance at the anchor wall 11 by the temporary anchoring means.

Furthermore, one end of the single cable body 61 is also provided with a main cable anchoring end 611, and the other end is connected with the main cable 6 through a cable-scattering saddle 7; the main cable anchoring end 611 is tightly abutted to the other side of the anchor wall 11, and is used for tensioning the single cable body 61.

It should be noted that the anchor cable 2 and the single cable body 61 are respectively anchored on two sides of the anchor wall 11, and are used for realizing the pulling force with opposite acting forces formed on the two sides of the anchor wall 11.

Further, each of the anchor cables 2 is disposed on the same vertical plane with the corresponding single cable body 61.

It should be noted that, a plurality of permanently serviceable cluster prestressed anchor cables 2 (the anchoring force of each anchor cable 2 can reach kiloton), the lower end of each anchor cable 2 is anchored in a firm rock body 5 after penetrating through a ground surface covering layer (can reach more than hundreds of meters) by utilizing a directional hole forming technology, the upper end of each anchor cable 2 is butted with a single or a plurality of cable strands of a main cable 6 dispersed by a cable scattering saddle 7 in an anchor chamber 1, the main cable 6 is anchored by bearing the tensile force of the cable strands after being anchored on an anchor wall 11, and then cement mortar is injected into an anchor cable duct 10 to form permanent protection for the anchor cable 2.

Furthermore, earth surface anchor cable blocks 20 are also arranged; the earth surface anchor cable block 20 is positioned and arranged on the earth surface, and the steel strand 22 passes through the anchor cable positioning pipe in the earth surface anchor cable 20 and extends towards the rock body 5

A construction method of a main cable of a suspension bridge under a bedrock deep burying condition comprises the following steps:

s1, leveling the field, removing sundries, replacing soft soil on the surface layer of the ground, and compacting the foundation 4; arranging materials and equipment required by construction;

s2, finishing the reinforced concrete anchor room 1 and the foundation construction thereof at the designed bridge position; an anchor wall 11 is manufactured in the anchor chamber 1, and anchor holes in the anchor wall 11 correspond to the spatial positions of the scattered cable strands and the anchor cables 2 respectively;

s3, pouring a reinforced concrete anchor cable 2 protection block at the position of the anchor cable pore passage 10 exposed out of the ground surface, and implanting an anchor cable 2 positioning pipe; drilling an anchor cable duct 10 in a rock-soil layer from a positioning pipe of the anchor cable 2 along the space position of the anchor cable 2 by using directional drilling equipment, and enlarging the duct at the anchor end position; synchronously implanting a protective pipe to protect the anchor cable duct 10 when drilling in the rock covering layer;

s4, blanking the prestressed steel strand 22 (or prestressed steel wire) with the protective material on the surface according to a determined length and weaving the prestressed steel strand into a bundle to form an anchor cable 2, and anchoring the lower end of the anchor cable 2 on a stainless steel plate in an extrusion anchoring mode to form an anchoring end structure; arranging a fusiform protective cover 24 at the periphery of the anchor end 21 of the anchor cable, arranging the lower end of the protective cover 24 into a structure form capable of being opened and closed, and implanting the anchor end of the anchor cable 2 into the protective cover 24 and fixing; when the anchor cable 2 is bundled, the grouting pipe 9 is attached, the lower end of the grouting pipe 9 is arranged in the protective cover 24, and the grouting pipe 9 can be pulled out;

s5, the anchor cable 2 and the grouting pipe 9 are penetrated into an anchor cable duct 10 from an anchor wall 11, and the anchoring end is arranged on the designed anchoring section;

s6, replacing slurry in the anchor cable duct 10 with clean water, and injecting the fine aggregate concrete to the anchoring end by using a grouting pipe 9 arranged along with the anchor cable 2 so that the fine aggregate concrete flows out from the lower end of the protective cover 24 and fills the anchor end duct, and the anchor cable 2 is anchored in a hard rock body 5;

s7, pre-tensioning the anchor cable 2 through the tool anchor device, and temporarily anchoring the anchor cable 2 at the anchor wall 11 after the bearing capacity is qualified;

s8, guiding the dispersed cable strands of the main cable 6 to an anchor wall 11, and symmetrically tensioning the cable strands and the corresponding anchor cables 2 to realize anchoring of the main cable 6; aiming at the requirement that the main cable 6 needs to be loaded in a grading way, the anchor cable 2 can be tensioned in a grading way through the tool anchor device;

s9, after the main cable is finally anchored, injecting cement mortar into the anchor cable duct 10 through the grouting pipe 9 so as to protect the anchor cable 2;

and S10, after the cement mortar is completely solidified, cleaning the site and completing construction.

For example, if in a particular construction, the above-ground foundation of the gravity anchor is a concrete block structure having a length of about 100 meters, a width of about 70 meters, and a height of about 80 meters; the structure anchor room 1 can be replaced by a hollow concrete structure with the length of about 30 meters, the width of about 30 meters and the height of about 30 meters, and the structure is about one sixth of the weight of the gravity type anchor structure, so that the weight of the whole foundation is greatly reduced; and if the stress limit of the main cable 6 is 90000 tons, 352 single cable bodies 61 are adopted, the tensile force borne by the dispersed single cable bodies 61 is about 256 tons, and the tensile force borne by a single anchor cable 2 is 1000 tons, so that the two cables completely meet the requirements when being pulled in opposite directions, the whole structure and the construction process are simple, the manpower, the material resources and the financial resources are greatly saved, good economic and social benefits are achieved, the design is reasonable, and the cable is suitable for wide popularization.

It should be noted that the detailed description of the present invention is not included in the prior art, or can be obtained directly from the market, and those skilled in the art can obtain the detailed description without creative efforts, and the detailed connection method has a very wide application in the field or daily life, and is not described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (8)

1. The utility model provides a suspension bridge main push-towing rope anchor system under basement rock deep-buried condition which characterized in that: the suspension bridge main cable anchoring system under the bedrock deep burying condition comprises an anchor chamber and an anchor cable; an anchor wall is positioned on the anchor chamber; the anchor chamber is positioned on the foundation through a pile foundation; the lower end of the anchor cable is anchored in a rock body, and the upper end of the anchor cable is anchored on the anchor wall; the lower end of the main cable uniformly anchors the cable strands on the anchor wall after dispersing the cable strands and is respectively arranged corresponding to the anchor cables.

2. The suspension bridge main cable anchoring system under bedrock deep burying condition as claimed in claim 1, wherein: and a plurality of layers of shear-resistant steel plates are arranged in the anchor wall.

3. The suspension bridge main cable anchoring system under bedrock deep burying condition as claimed in claim 1, wherein: the lower end of the main cable disperses the cable strands into a plurality of single cable bodies through a cable dispersing saddle; the single cable bodies are respectively anchored on the anchor walls.

4. The suspension bridge main cable anchoring system under bedrock deep burying condition as claimed in claim 1, wherein: the anchor cable comprises an anchor cable anchoring end, a steel strand and a tensioning end which are connected in sequence; the anchor end of the anchor cable is anchored in the rock body, and the steel strand penetrates through the rock body and the anchor wall and then is connected with the tensioning end; the tensioning end is tightly abutted to one side of the anchor wall and used for tensioning the anchor cable.

5. The suspension bridge main cable anchoring system under bedrock deep burying condition as claimed in claim 4, wherein: the periphery of the anchoring end of the anchor cable is provided with a fusiform protective cover, and the outer end of the protective cover is provided with a grout outlet.

6. The suspension bridge main cable anchoring system under bedrock deep burying condition as claimed in claim 4, wherein: a protective sleeve is also arranged; the protective sleeve is sleeved on the steel strand.

7. The suspension bridge main cable anchoring system under bedrock deep burying condition as claimed in claim 6, wherein: the outer end of the grouting pipe penetrates through the protective sleeve and the protective cover and extends inwards; and (4) penetrating the anchor cable into the anchor cable hole from the ground surface anchor chamber.

8. The suspension bridge main cable anchoring system under bedrock deep burying condition as claimed in claim 3, wherein: one end of the single cable body is also provided with a main cable anchoring end, and the other end of the single cable body is connected with the main cable through a cable-spreading saddle; the main cable anchoring end is tightly abutted to the other side of the anchor wall and used for tensioning the single cable body.

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