CN103397597B - A kind of large-tonnage combination anchor system and method being applicable to steep rock side slope - Google Patents
A kind of large-tonnage combination anchor system and method being applicable to steep rock side slope Download PDFInfo
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- CN103397597B CN103397597B CN201310355108.8A CN201310355108A CN103397597B CN 103397597 B CN103397597 B CN 103397597B CN 201310355108 A CN201310355108 A CN 201310355108A CN 103397597 B CN103397597 B CN 103397597B
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Abstract
A kind of large-tonnage combination anchor system and method being applicable to steep rock side slope, relate to field of bridge construction, comprise at least one vertical distribution beam, many transverse distribution beams and multi beam longitudinal prestressing anchor cable, described vertical distribution beam is arranged along steep rock side slope, contiguous scar below it, top anchoring dorsal funciculus, many transverse distribution beams are fixed above described vertical distribution beam, often restraint longitudinal prestressing anchor cable one end and extend to anchoring in rock mass, the other end is anchored to transverse distribution beam by ground tackle, often bundle longitudinal prestressing anchor cable is vertical with transverse distribution beam is arranged, described vertical distribution beam end connects a little distribution beam, between little distribution beam and rock mass, bed course is set.The present invention, under the conditions such as steep rock side slope, can provide large-tonnage anchored force for drag-line, effectively reduces open excavation amount, reduces difficulty of construction and construction risk.
Description
Technical field
The present invention relates to field of bridge construction, is specifically a kind of large-tonnage combination anchor system and method for being applicable to steep rock side slope.
Background technology
Usually, arch bridge is when utilizing stayed knotting method to construct, the anchored end of knotted rope is generally arranged on the arch rib of arch bridge, and the anchored end of dorsal funciculus (also referred to as anchor cable) is generally positioned on anchorage structures, and the stretching end of knotted rope and anchor cable is then generally arranged on agent structure or temporary structure.
Wherein, anchorage structures common are the forms such as piled anchor, gravity anchor, prestressed anchor.Under the bad orographic conditions such as steep rock side slope, when anchorage adopts piled anchor or gravity anchor, open excavation amount is large, and plant equipment is marched into the arena difficulty, and difficulty of construction is very big.And during anchorage employing prestressed anchor, the anchored force that can provide due to single bundle prestress anchorage cable is limited, general employing many prestress anchorage cables by concrete anchorage anchor firmly, then provide the anchored force needed for prestress anchorage cable by concrete anchorage.But under the bad orographic conditions such as the steep rock side slope in mountain area or valley, when adopting concrete anchorage, large volume anchorage difficult arrangement, excavation of foundation pit difficulty are huge, and construction risk is high.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide a kind of the large-tonnage combination anchor system and the method that are applicable to steep rock side slope, under the conditions such as steep rock side slope, large-tonnage anchored force can be provided for drag-line, effective minimizing open excavation amount, reduces difficulty of construction and construction risk.
For reaching above object, the invention provides a kind of large-tonnage combination anchor system being applicable to steep rock side slope, comprise at least one vertical distribution beam, many transverse distribution beams and multi beam longitudinal prestressing anchor cable, described vertical distribution beam is arranged along steep rock side slope, contiguous scar below it, top anchoring dorsal funciculus, many transverse distribution beams are fixed above described vertical distribution beam, often restraint longitudinal prestressing anchor cable one end and extend to anchoring in rock mass, the other end is anchored to transverse distribution beam by ground tackle, often bundle longitudinal prestressing anchor cable is vertical with transverse distribution beam is arranged, described vertical distribution beam end connects a little distribution beam, between little distribution beam and rock mass, bed course is set, arrange to pad between described transverse distribution beam and scar and pile up neatly, described pad buttress lays respectively at the two ends of transverse distribution beam, and transverse distribution beam is welded and fixed with pad buttress, if dorsal funciculus produces pull out force upwards, then also comprise vertical prestressed anchor cables, described vertical prestressed anchor cables one end extends to anchoring in rock mass, and the other end is anchored to little distribution beam by ground tackle.
On the basis of technique scheme, described many transverse distribution beams be arranged in parallel, and all vertical with described vertical distribution beam, and described vertical distribution beam is positioned at below the mid point of every root transverse distribution beam.
On the basis of technique scheme, the vertical distribution beam that described little distribution beam connects, is positioned at same perpendicular with the vertical prestressed anchor cables of this little distribution beam anchoring.
On the basis of technique scheme, described vertical distribution beam arranges multiple anchor point for anchoring dorsal funciculus, each anchor point and vertical distribution beam are welded and fixed, and each anchor point contains the hinge structure being applicable to anchor cable different angles.
On the basis of technique scheme, described vertical distribution beam, transverse distribution beam and little distribution beam are steel structure girder.
The present invention also provides a kind of large-tonnage combination anchor method being applicable to steep rock side slope, comprises step: S1. first scar is levelling, utilizes boring bar tool to carry out the anchor hole construction of longitudinal prestressing anchor cable; S2. the multipair pad buttress of vertical installation, is welded on multiple anchor point in vertical distribution beam; Place vertical distribution beam, and vertical distribution beam is positioned in the middle of often pair of pad buttress; S3. on often pair of pad buttress, transverse distribution beam is installed, vertical distribution beam is welded with many transverse distribution beams; Or many transverse distribution beams and vertical distribution beam are welded as entirety, more every root transverse distribution beam are welded on often pair of pad buttress; S4. weld little distribution beam at vertical distribution beam end, between little distribution beam and rock mass, bed course is set; S5. in described anchor hole, install longitudinal prestressing anchor cable and be in the milk, stretch-draw longitudinal prestressing anchor cable also locks, and the anchored end of dorsal funciculus is connected with anchor point; If dorsal funciculus produces pull out force upwards, then step S1 also carries out the anchor hole construction of vertical prestressed anchor cables, during step S5, increases and installs vertical prestressed anchor cables and be in the milk.
Beneficial effect of the present invention is:
1, the present invention is applicable to the large-tonnage combination anchor system of steep rock side slope, adopts steel structure girder, and transverse distribution beam bottom welding pad is piled up neatly, and power transmission is more even, and compared to traditional steel concrete anchorage, definitely stressed, Path of Force Transfer is more clear.
2, in rock side slope, peace is torn open convenient and swift, and component all can be assembled in factory process, effectively reduces construction volume and construction period.
3, steel structure girder part recoverable, be conducive to reducing construction costs, decrease open excavation amount simultaneously, construction risk reduces, and reduces the destruction to natural environment simultaneously.
Accompanying drawing explanation
Fig. 1 is the application scenarios schematic diagram of large-tonnage combination anchor system of the present invention;
Fig. 2 is the partial enlarged drawing of part A in Fig. 1;
Fig. 3 is the left side view of Fig. 2;
Fig. 4 is the connection diagram of vertical distribution beam and little distribution beam in Fig. 2.
Reference numeral:
1-dorsal funciculus, 2-agent structure, 3-temporary structure, 4-knotted rope, 5-rib structure,
6-longitudinal prestressing anchor cable, 7-vertical prestressed anchor cables, the vertical distribution beam of 8-, 9-transverse distribution beam, 10-pad is piled up neatly, 11-anchor point, the little distribution beam of 12-, 13-connector, 14-bed course, 15-anchor hole.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, the present invention is applicable to the large-tonnage combination anchor system of steep rock side slope, is connected with one end of dorsal funciculus 1, for dorsal funciculus 1 provides anchorage point and anchoring counter-force.The other end of described dorsal funciculus 1 is stretching end, can be arranged in agent structure 2, also can be arranged on be positioned at agent structure 2 top temporary structure 3 on, in the present embodiment, the stretching end of dorsal funciculus 1 is arranged in agent structure 2.The knotted rope 4 corresponding with dorsal funciculus 1, its stretching end is also arranged in agent structure 2, or is positioned on temporary structure 3, and knotted rope 4 anchored end is then arranged on rib structure 5.The vertical force component of balanced arch rib structure 5 generation is carried out by stretch-draw knotted rope 4, rib structure 5 is fastened with this, simultaneous tension dorsal funciculus 1 balances the horizontal component that knotted rope 4 stretch-draw produces, and is finally applicable to the large-tonnage combination anchor system of steep rock side slope to bear the internal force of dorsal funciculus 1 by the present invention.
As shown in Figure 2, Figure 3 and Figure 4, the present invention is applicable to the large-tonnage combination anchor system of steep rock side slope, comprise multi beam longitudinal prestressing anchor cable 6, at least one vertical distribution beam 8, many transverse distribution beams 9 and little distribution beam 12, in the present embodiment, described distribution beam is steel structure girder, and vertical distribution beam 8 has two.Described vertical distribution beam 8 is arranged along steep rock side slope, contiguous scar below it, top is provided with multiple anchor point 11 for anchoring dorsal funciculus 1, each anchor point 11 is welded and fixed with vertical distribution beam 8, each anchor point 11 is containing hinged structure, be applicable to dorsal funciculus 1 different angles, as dorsal funciculus 1 and the angle beta, θ etc. of horizontal plane, angle is different because of the position difference of dorsal funciculus 1 anchored end.Be fixedly installed many transverse distribution beams 9 above described vertical distribution beam 8, arrange and pad buttress 10 between transverse distribution beam 9 and scar, pad buttress 10 lays respectively at the two ends of transverse distribution beam 9, and transverse distribution beam 9 connects relative fixing with pad buttress 10 by spot welding.Described many transverse distribution beams 9 be arranged in parallel, and all vertical with vertical distribution beam 8, and vertical distribution beam 8 is positioned at below the mid point of every root transverse distribution beam 9, and are welded and fixed with every root transverse distribution beam 9.Transverse distribution beam 9 arranges ground tackle above pad buttress 10 correspondence, one end of anchoring longitudinal prestressing anchor cable 6, be used for stretch-draw lock longitudinal prestressing anchor cable 6, the direction of longitudinal prestressing anchor cable 6 is vertical with transverse distribution beam 9, and the other end often restrainting longitudinal prestressing anchor cable 6 extends to anchoring in rock mass.The end of the vertical distribution beam of every root 8 connects a little distribution beam 12, little distribution beam 12 is positioned at same perpendicular with vertical distribution beam 8, the two is welded and fixed by the connectors such as arm-tie 13, between little distribution beam 12 and rock mass, bed course 14 is set, the end face of bed course 14 is as pressure-bearing surface, be used for resisting dorsal funciculus 1 and produce downward component, the downforce that dorsal funciculus 1 produces is passed to rock mass, and height, the size of described bed course 14 are determined by the internal force of vertical distribution beam 8.When dorsal funciculus 1 produce be pull out force upwards time, then need to add vertical prestressed anchor cables 7, tensioning fixation is carried out by the ground tackle in little distribution beam 12 in its one end, latching force is determined by the internal force of vertical distribution beam 8, the other end of vertical prestressed anchor cables 7 extends to anchoring in rock mass, and vertical prestressed anchor cables 7 and vertical distribution beam 8 are positioned at same perpendicular.
As shown in Figure 1 to Figure 3, in the embodiment of the present invention, longitudinal prestressing anchor cable 6 and vertical prestressed anchor cables 7, all adopt the flexible material such as high tensile steel wire or steel strand, stable rock mass bearing stratum is extended into by anchor hole 15, its anterior cement paste by perfusion in anchor hole 15 forms anchoring section (C dotted line frame region in Fig. 2, length is relevant with the internal force of anchor cable 4), (stretching end of longitudinal prestressing anchor cable 6 is B dotted line frame region in Fig. 2 for rear end and stretching end, the stretching end of prestress anchorage cable 7 is D dotted line frame region in Fig. 4), stretching end is by ground tackle and transverse distribution beam 9, the anchor connection respectively of little distribution beam 12.Described vertical distribution beam 8 cross section is welding box-shaped cross section or shaped steel combination cross section, and can be placed in below transverse distribution beam 9 is near scar side, in other embodiments, also can be placed in above transverse distribution beam 9.Described transverse distribution beam 9 cross section is welding box-shaped cross section or shaped steel combination cross section, and the gap left between rock mass is close to rock mass by padding buttress 10, ground tackle locking longitudinal prestressing anchor cable 6 is set above transverse distribution beam 9, thus provides the counter-force of the anchoring needed for dorsal funciculus 1 by longitudinal prestressing anchor cable 6; Described pad buttress 10 can with steel work or concrete structure, pad buttress 10 contact position scar needs levelling, does bed course if desired levelling, guarantees that pad buttress 10 is closely connected with scar, longitudinal prestressing anchor cable 6 pressure evenly can be passed to rock mass, and scar effective pressure area need meet calculation requirement.
As shown in Figures 2 and 3, in the present embodiment, dorsal funciculus 1 produces pull out force upwards, the power transmission principle of whole combination anchor system is: the internal force of dorsal funciculus 1 is passed to vertical distribution beam 8 via anchor point 11, transverse distribution beam 9 and little distribution beam 12 is passed to respectively again by vertical distribution beam 8, and then pass to longitudinal prestressing anchor cable 6 by transverse distribution beam 9, pass to vertical prestressed anchor cables 7 by little distribution beam 12, finally pass to stable rock mass bearing stratum respectively by longitudinal prestressing anchor cable 6 and vertical prestressed anchor cables 7.
As shown in Figure 1 to Figure 3, the present invention is applicable to the large-tonnage combination anchor method of steep rock side slope, comprises the steps:
S1. first scar is levelling, utilizes boring bar tool to carry out the construction of longitudinal prestressing anchor cable 6 reserving hole channel and anchor hole 15; Carry out the processing of vertical steel work such as distribution beam 8 grade simultaneously.
S2. the multipair pad buttress 10 of vertical installation, is welded on multiple anchor point 11 in vertical distribution beam 8; Place vertical distribution beam 8, and vertical distribution beam 8 is positioned in the middle of often pair of pad buttress 10.
S3. on often pair of pad buttress 10, transverse distribution beam 9 is installed, vertical distribution beam 8 is welded with many transverse distribution beams 9; If field condition allows, also many transverse distribution beams 9 and vertical distribution beam 8 can be welded as entirety, more every root transverse distribution beam 9 is welded on often pair of pad buttress 10.
S4. weld little distribution beam 12 at vertical distribution beam 8 end, between little distribution beam 12 and rock mass, bed course 14 is set;
S5. in described anchor hole 15, install longitudinal prestressing anchor cable 6 and be in the milk, stretch-draw longitudinal prestressing anchor cable 6 also locks, and the anchored end of dorsal funciculus 1 is connected with anchor point 11.
If when dorsal funciculus 1 produces pull out force upwards, then while step S1, the anchor hole 15 also carrying out vertical prestressed anchor cables 7 is constructed, and when step S5, increases and installs vertical prestressed anchor cables 7 and be in the milk, equally also will carry out stretch-draw vertical prestressed anchor cables 7 and lock.
The present invention is not limited to above-mentioned embodiment, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this manual belongs to the known prior art of professional and technical personnel in the field.
Claims (6)
1. one kind is applicable to the large-tonnage combination anchor system of steep rock side slope, comprise at least one vertical distribution beam, many transverse distribution beams and multi beam longitudinal prestressing anchor cable, described vertical distribution beam is arranged along steep rock side slope, contiguous scar below it, top anchoring dorsal funciculus, it is characterized in that: above described vertical distribution beam, fix many transverse distribution beams, often restraint longitudinal prestressing anchor cable one end and extend to anchoring in rock mass, the other end is anchored to transverse distribution beam by ground tackle, often bundle longitudinal prestressing anchor cable is vertical with transverse distribution beam is arranged, described vertical distribution beam end connects a little distribution beam, between little distribution beam and rock mass, bed course is set,
Arrange to pad between described transverse distribution beam and scar and pile up neatly, described pad buttress lays respectively at the two ends of transverse distribution beam, and transverse distribution beam is welded and fixed with pad buttress;
If dorsal funciculus produces pull out force upwards, then also comprise vertical prestressed anchor cables, described vertical prestressed anchor cables one end extends to anchoring in rock mass, and the other end is anchored to little distribution beam by ground tackle.
2. be applicable to the large-tonnage combination anchor system of steep rock side slope as claimed in claim 1, it is characterized in that: described many transverse distribution beams be arranged in parallel, and all vertical with described vertical distribution beam, described vertical distribution beam is positioned at below the mid point of every root transverse distribution beam.
3. be applicable to the large-tonnage combination anchor system of steep rock side slope as claimed in claim 1, it is characterized in that: the vertical distribution beam that described little distribution beam connects, be positioned at same perpendicular with the vertical prestressed anchor cables of this little distribution beam anchoring.
4. be applicable to the large-tonnage combination anchor system of steep rock side slope as claimed in claim 1, it is characterized in that: described vertical distribution beam arranges multiple anchor point for anchoring dorsal funciculus, each anchor point and vertical distribution beam are welded and fixed, and each anchor point contains the hinge structure being applicable to anchor cable different angles.
5. be applicable to the large-tonnage combination anchor system of steep rock side slope as claimed in claim 1, it is characterized in that: described vertical distribution beam, transverse distribution beam and little distribution beam are steel structure girder.
6., based on the large-tonnage combination anchor method being applicable to steep rock side slope of anchoring system described in claim 1, it is characterized in that, comprise step:
S1. first scar is levelling, utilizes boring bar tool to carry out the anchor hole construction of longitudinal prestressing anchor cable;
S2. the multipair pad buttress of vertical installation, is welded on multiple anchor point in vertical distribution beam; Place vertical distribution beam, and vertical distribution beam is positioned in the middle of often pair of pad buttress;
S3. on often pair of pad buttress, transverse distribution beam is installed, vertical distribution beam is welded with many transverse distribution beams; Or many transverse distribution beams and vertical distribution beam are welded as entirety, more every root transverse distribution beam are welded on often pair of pad buttress;
S4. weld little distribution beam at vertical distribution beam end, between little distribution beam and rock mass, bed course is set;
S5. in described anchor hole, install longitudinal prestressing anchor cable and be in the milk, stretch-draw longitudinal prestressing anchor cable also locks, and the anchored end of dorsal funciculus is connected with anchor point;
If dorsal funciculus produces pull out force upwards, then step S1 also carries out the anchor hole construction of vertical prestressed anchor cables, during step S5, increases and installs vertical prestressed anchor cables and be in the milk.
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| CN103866691B (en) * | 2014-03-27 | 2015-09-09 | 中交一公局第一工程有限公司 | A kind of Large scale cable crane track cable group anchor device |
| CN104929118B (en) * | 2015-07-13 | 2017-03-08 | 叶益斌 | A kind of combined type Recyclable anchor rope structural member and its application |
| CN108867382A (en) * | 2018-06-14 | 2018-11-23 | 张学武 | Anchor system and construction method after prestressing force type |
| CN108755446A (en) * | 2018-06-14 | 2018-11-06 | 中国葛洲坝集团第五工程有限公司 | A kind of construction system and construction method of no buttress suspension pouring arch-type bridge |
| CN110042767B (en) * | 2019-05-30 | 2021-05-25 | 广西路桥工程集团有限公司 | Cable buckling and anchoring method of cable hoisting system |
| CN111455838A (en) * | 2020-05-20 | 2020-07-28 | 中国电建集团成都勘测设计研究院有限公司 | Arch cableway bridge abutment |
| CN113073554A (en) * | 2021-03-08 | 2021-07-06 | 中国葛洲坝集团路桥工程有限公司 | Large-tonnage anchorage structure on steep slope and construction method thereof |
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