CN102330431A - Flexible support structure of pre-stress anchor rod for lattice type frame and construction method of flexible support structure - Google Patents

Flexible support structure of pre-stress anchor rod for lattice type frame and construction method of flexible support structure Download PDF

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Publication number
CN102330431A
CN102330431A CN201110164260A CN201110164260A CN102330431A CN 102330431 A CN102330431 A CN 102330431A CN 201110164260 A CN201110164260 A CN 201110164260A CN 201110164260 A CN201110164260 A CN 201110164260A CN 102330431 A CN102330431 A CN 102330431A
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China
Prior art keywords
anchor
column
prestressed
crossbeam
prestressed anchor
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CN201110164260A
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Chinese (zh)
Inventor
朱彦鹏
周勇
李忠
董建华
马天忠
叶帅华
毕东涛
任永忠
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Lanzhou University of Technology
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Lanzhou University of Technology
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Priority to CN201110164260A priority Critical patent/CN102330431A/en
Publication of CN102330431A publication Critical patent/CN102330431A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a flexible support structure of a pre-stress anchor rod for a lattice type frame and a construction method of the flexible support structure. Cross beams (1) and upright posts (2) form the lattice type frame; the pre-stress anchor rods (3) penetrate through the crossed parts between the cross beams (1) and the upright posts (2); the periphery of an anchored section (5) of each pre-stress anchor rod (3) is wrapped by cement mortar; the periphery of a plastic sleeve (12) is wrapped by cement mortar; and the end parts of the pre-stress anchor rods (3) are anchored at the crossed parts between the cross beams (1) and the upright posts (2) by an anchor head (4) and are anchored in a stable soil layer through the anchored section (5). The method comprises the following steps of: firstly, manufacturing and constructing the pre-stress anchor rods (3); secondly, casting a coping top beam (6), the upright posts (2) and the cross beams (1); thirdly, carrying out prestress tensioning on a reinforced anchor bar (10); and fourthly, constructing the pre-stress anchor rods (3), the cross beams (1) and the upright posts (2) on next work surface according to the step and finishing the tensioning and the anchoring of the pre-stress anchor rod (3) on each layer.

Description

Lattice type portal frame prestressed anchor flexible support structure and job practices thereof
Technical field
The present invention relates to the slow loess slope supporting field of the gradient.
Background technology
In the past, to the loess area gradient the support technology of slow highway, railway and building slope adopt the gravity barricade more.The way of gravity barricade can adopt free stone masonry, also can adopt plain concrete to build and form, and this kind method mainly relies on deadweight and the rigidity of barricade to come the lateral pressure of the soil body after the resistance wall.
The shortcoming of this support technology is: 1) from great; 2) rigidity is big, poor seismic behavior; 3) resistance to overturning is poor, and resistance to capsizing is not enough.Therefore, the situation of overturning of retaining wall and slippage often occurs, influence the safety of engineering services,, strengthen its anti-seismic performance, adopt lattice type portal frame prestressed anchor flexible support method that side slope is carried out supporting in order to improve the stability of loess slope.
Summary of the invention
The objective of the invention is through a kind of lattice type portal frame prestressed anchor flexible support framework and job practices thereof are provided; Make the slow loess slope that potential sliding rupture trend is arranged of the original gradient be in stable state, prevent that loess slope from producing destruction under rainfall state or geological process.
The present invention is lattice type portal frame prestressed anchor flexible support structure and job practices thereof; Its supporting and protection structure middle cross beam 1, column 2 constitute lattice type portal frame; Prestressed anchor 3 passes the crossover sites of crossbeam 1 and column 2; Around the anchoring section 5 of prestressed anchor 3, wrap up cement mortar, on the free section 11 of prestressed anchor 3, be coated with one deck anti-corrosion material, suit plastic bushing 12 outside anti-corrosion material; Around plastic bushing 12, wrap up cement mortar; Anchor head 4 fixes on the crossover sites of crossbeam 1 and column 2 with the end anchor of prestressed anchor 3, and the suffered soil pressure of crossbeam 1, column 2 reaches the anchoring section 5 of prestressed anchor 3 through anchor head 4, and is anchored in the steady soil through anchoring section 5.
Job practices of the present invention the steps include:
(1) making and construction prestressed anchor 3: at first in soil layer, offer hole 8; To be welded on the reinforcing bar anchor tie 10 medium-height trestle 9; Reinforcing bar anchor tie 10 is positioned in the hole 8, injects cement mortar, on the free section 11 of reinforcing bar anchor tie 10, smear anti-corrosion material at anchoring section 5; Put plastic bushing 12 in free section 11 then, in the hole 8 of free section 11, inject cement mortar at last;
(2) pour into a mould bear down on one hat beam 6, column 2 and crossbeam 1: at the design attitude place formwork of first root post 2 and the first horizontal row beam 1, the cage of reinforcement and the concreting of colligation crossbeam 1, column 2 in the groove that formwork forms;
(3) concrete strength of treating crossbeam 1, column 2 reaches 85% and reinforcing bar anchor tie 10 is carried out prestressed stretch-draw when above; Form prestressed anchor 3; Will be locked with ground tackle 13 with the anchor head 4 that prestressed anchor 3 is fastenedly connected, do the concrete spray coating 14 that is used to protect anchor head 4 and ground tackle 13 then;
(4), and accomplish the stretch-draw and the anchoring of each layer prestressed anchor 3 according to this step the construct prestressed anchor 3 and crossbeam 1, column 2 of next work plane;
(5) according to the bottom of (2) step operation construction column 2 to column 2, construction crossbeam 1 is made all the other prestressed anchors 3 and is accomplished corresponding operation at design attitude place, the bottom of column 2;
(6) make foundation pile 7 in the corresponding position, bottom of column 2: put into reinforcing cage in the stake hole of offering, reinforcing bars in the bottom protruding bar of column 2 and the foundation pile 7 are welded to connect, pour into a mould foundation pile 7.
The invention has the beneficial effects as follows: adopt the lattice type portal frame prestressed anchor to carry out supporting through the loess slope that potential sliding rupture trend is arranged that the original gradient is delayed, and reinforced anchor bolt is applied prestressing force, thereby improved the stability of side slope; Lattice girder that on loess slope, applies and prestressed anchor can be controlled the slippage and the distortion of side slope effectively, improve its anti-seismic performance simultaneously; Overcome that traditional gravity barricade cost is high, engineering quantity is big, stability is low, to shortcomings such as environmental disruption are big; The safety that perturbation to side slope in work progress is little, the employing reverse construction has guaranteed work progress; Through grass planting in the sash that forms at lattice girder, can reduce the side slope soil erosion, reach the purpose of ecological revetment; Technology is simple, is convenient to use.
Description of drawings
Fig. 1 is the elevation of structure of the present invention, and Fig. 2 is the sectional side view among Fig. 1, and Fig. 3 is a prestressed anchor detail of construction of the present invention, also is construction reference figure, the reinforcing bar anchor tie 12 among the figure in construction and the name after applying prestressing force be called prestressed anchor 3.
The specific embodiment
The present invention is lattice type portal frame prestressed anchor flexible support structure and job practices thereof; Its supporting and protection structure middle cross beam 1, column 2 constitute lattice type portal frame; Prestressed anchor 3 passes the crossover sites of crossbeam 1 and column 2; Around the anchoring section 5 of prestressed anchor 3, wrap up cement mortar, on the free section 11 of prestressed anchor 3, be coated with one deck anti-corrosion material, suit PVC plastic bushing 12 outside anti-corrosion material; Around PVC plastic bushing 12, wrap up cement mortar; Anchor head 4 fixes on the crossover sites of crossbeam 1 and column 2 with the end anchor of prestressed anchor 3, and the suffered soil pressure of crossbeam 1, column 2 reaches the anchoring section 5 of prestressed anchor 3 through anchor head 4, and is anchored in the steady soil through anchoring section 5.
The anchor pole inclination angle that prestressed anchor 3 is become with horizontal plane is 5 °~15 °.
When implementing, adopt contrary sequence method, section construction, from top to bottom successively promptly, section construction, the step of its job practices is:
(1) making and construction prestressed anchor 3: at first in soil layer, offer hole 8; To be welded on the reinforcing bar anchor tie 10 medium-height trestle 9; Reinforcing bar anchor tie 10 is positioned in the hole 8, injects cement mortar, on the free section 11 of reinforcing bar anchor tie 10, smear anti-corrosion material at anchoring section 5; Put PVC plastic bushing 12 in free section 11 then, in the hole 8 of free section 11, inject cement mortar at last;
(2) pour into a mould bear down on one hat beam 6, column 2 and crossbeam 1: at the design attitude place formwork of first root post 2 and the first horizontal row beam 1, the cage of reinforcement and the concreting of colligation crossbeam 1, column 2 in the groove that formwork forms;
(3) concrete strength of treating crossbeam 1, column 2 reaches 85% and reinforcing bar anchor tie 10 is carried out prestressed stretch-draw when above; Form prestressed anchor 3; Will be locked with ground tackle 13 with the anchor head 4 that prestressed anchor 3 is fastenedly connected, do the concrete spray coating 14 that is used to protect anchor head 4 and ground tackle 13 then;
(4), and accomplish the stretch-draw and the anchoring of each layer prestressed anchor 3 according to this step the construct prestressed anchor 3 and crossbeam 1, column 2 of next work plane;
(5) according to the bottom of (2) step operation construction column 2 to column 2, construction crossbeam 1 is made all the other prestressed anchors 3 and is accomplished corresponding operation at design attitude place, the bottom of column 2;
(6) make foundation pile 7 in the corresponding position, bottom of column 2: put into reinforcing cage in the stake hole of offering, reinforcing bars in the bottom protruding bar of column 2 and the foundation pile 7 are welded to connect, pour into a mould foundation pile 7.

Claims (3)

1. lattice type portal frame prestressed anchor flexible support structure; It is characterized in that supporting and protection structure middle cross beam (1), column (2) constitute lattice type portal frame; Prestressed anchor (3) passes the crossover sites of crossbeam (1) and column (2); Anchoring section (5) in prestressed anchor (3) wraps up cement mortar on every side, on the free section (11) of prestressed anchor (3), is coated with one deck anti-corrosion material, suit plastic bushing (12) outside anti-corrosion material; Wrap up cement mortar on every side at plastic bushing (12); Anchor head (4) fixes on the crossover sites of crossbeam (1) and column (2) with the end anchor of prestressed anchor (3), and the suffered soil pressure of crossbeam (1), column (2) reaches the anchoring section (5) of prestressed anchor (3) through anchor head (4), and is anchored in the steady soil through anchoring section (5).
2. require described lattice type portal frame prestressed anchor flexible support structure according to right 1, it is characterized in that the anchor pole inclination angle that prestressed anchor (3) is become with horizontal plane is 5 °~15 °
3. the job practices of lattice type portal frame prestressed anchor flexible support structure the steps include:
(1) making and construction prestressed anchor (3): at first in soil layer, offer hole (8); To be welded on the reinforcing bar anchor tie (10) medium-height trestle (9); Reinforcing bar anchor tie (10) is positioned in the hole (8), injects cement mortar, on the free section (11) of reinforcing bar anchor tie (10), smear anti-corrosion material at anchoring section (5); Put plastic bushing (12) in free section (11) then, in the hole (8) of free section (11), inject cement mortar at last;
(2) pour into a mould bear down on one Guan Liang (6), column (2) and crossbeam (1): at the design attitude place formwork of first root post (2) and the first horizontal row beam (1), the cage of reinforcement and the concreting of colligation crossbeam (1), column (2) in the groove that formwork forms;
(3) concrete strength of treating crossbeam (1), column (2) reaches 85% and reinforcing bar anchor tie (10) is carried out prestressed stretch-draw when above; Form prestressed anchor (3); Will be locked with ground tackle (13) with the anchor head (4) that prestressed anchor (3) are fastenedly connected, do the concrete spray coating (14) that is used to protect anchor head (4) and ground tackle (13) then;
(4), and accomplish the stretch-draw and the anchoring of each layer prestressed anchor (3) according to this step construct prestressed anchor (3) and crossbeam (1), the column (2) of next work plane;
(5) according to the bottom of (2) step operation construction column (2) to column (2),, make all the other prestressed anchors (3) and accomplish corresponding operation at the design attitude place, bottom of column (2) construction crossbeam (1);
(6) make foundation pile (7) in the corresponding position, bottom of column (2): put into reinforcing cage in the stake hole of offering, bottom protruding bar and the interior reinforcing bar of foundation pile (7) of column (2) is welded to connect, pour into a mould foundation pile (7).
CN201110164260A 2011-06-16 2011-06-16 Flexible support structure of pre-stress anchor rod for lattice type frame and construction method of flexible support structure Pending CN102330431A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103243724A (en) * 2013-05-22 2013-08-14 中铁二院工程集团有限责任公司 Bedding cutting high slope closing reinforcement structure
CN103397597A (en) * 2013-08-14 2013-11-20 中铁大桥局股份有限公司 Large-tonnage combination anchoring system and method for rocky slope
CN103469814A (en) * 2013-09-24 2013-12-25 兰州理工大学 Novel barricade supporting structure for road or river bank dam and construction method thereof
CN103628489A (en) * 2013-12-05 2014-03-12 长沙理工大学 Expressway slope reinforcement structure
CN103850254A (en) * 2014-04-01 2014-06-11 兰州理工大学 Side slope anchoring structure with early warning energy consumption and damping control system and construction method
CN103866765A (en) * 2014-04-01 2014-06-18 兰州理工大学 Early warning and seismic control integrated side slope anchoring structure and construction method thereof
CN103911994A (en) * 2014-04-18 2014-07-09 周同和 Prestressed anchor construction technology
CN104762978A (en) * 2014-12-26 2015-07-08 浙江省电力设计院 Anchor rod gravity retaining wall for high slope support and manufacturing method
CN105649091A (en) * 2015-04-30 2016-06-08 中国建筑第四工程局有限公司 High slope support method and structure
CN105887895A (en) * 2016-06-08 2016-08-24 贵州正业工程技术投资有限公司 Foundation supporting device for reinforcing support through karst broken rock body
CN106284368A (en) * 2016-08-10 2017-01-04 兰州理工大学 A kind of recyclable assembled frame sawtooth anchor pole and construction method
CN107130609A (en) * 2015-11-24 2017-09-05 叶长青 Without the basement supporting to support
CN107130618A (en) * 2016-04-12 2017-09-05 叶长青 Bank protection retaining structure construction method
CN107748048A (en) * 2017-12-18 2018-03-02 兰州理工大学 Sash reinforcement with prestressed anchor side slope shaking table model device and construction method
CN109403355A (en) * 2018-08-31 2019-03-01 河海大学 A kind of novel side slope support system

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CN1916297A (en) * 2006-09-04 2007-02-21 陈洪凯 Method for composite skid proof treatment for nail and anchor, and treating structure
CN101487258A (en) * 2009-02-18 2009-07-22 路桥集团国际建设股份有限公司 Bearing rope anchor of cable crane and its construction method
JP2010180688A (en) * 2009-04-17 2010-08-19 Rokuro Unno Slope protection apparatus
CN201671108U (en) * 2010-04-27 2010-12-15 中国科学院武汉岩土力学研究所 Riverside shoulder prestressing anchor cable sheet-pile wall
CN201679014U (en) * 2009-07-10 2010-12-22 李中国 Novel type sheet-pile retaining wall

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1916297A (en) * 2006-09-04 2007-02-21 陈洪凯 Method for composite skid proof treatment for nail and anchor, and treating structure
CN101487258A (en) * 2009-02-18 2009-07-22 路桥集团国际建设股份有限公司 Bearing rope anchor of cable crane and its construction method
JP2010180688A (en) * 2009-04-17 2010-08-19 Rokuro Unno Slope protection apparatus
CN201679014U (en) * 2009-07-10 2010-12-22 李中国 Novel type sheet-pile retaining wall
CN201671108U (en) * 2010-04-27 2010-12-15 中国科学院武汉岩土力学研究所 Riverside shoulder prestressing anchor cable sheet-pile wall

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103243724A (en) * 2013-05-22 2013-08-14 中铁二院工程集团有限责任公司 Bedding cutting high slope closing reinforcement structure
CN103397597A (en) * 2013-08-14 2013-11-20 中铁大桥局股份有限公司 Large-tonnage combination anchoring system and method for rocky slope
CN103397597B (en) * 2013-08-14 2015-10-21 中铁大桥局集团有限公司 A kind of large-tonnage combination anchor system and method being applicable to steep rock side slope
CN103469814A (en) * 2013-09-24 2013-12-25 兰州理工大学 Novel barricade supporting structure for road or river bank dam and construction method thereof
CN103628489A (en) * 2013-12-05 2014-03-12 长沙理工大学 Expressway slope reinforcement structure
CN103850254A (en) * 2014-04-01 2014-06-11 兰州理工大学 Side slope anchoring structure with early warning energy consumption and damping control system and construction method
CN103866765A (en) * 2014-04-01 2014-06-18 兰州理工大学 Early warning and seismic control integrated side slope anchoring structure and construction method thereof
CN103911994A (en) * 2014-04-18 2014-07-09 周同和 Prestressed anchor construction technology
CN104762978A (en) * 2014-12-26 2015-07-08 浙江省电力设计院 Anchor rod gravity retaining wall for high slope support and manufacturing method
CN105649091A (en) * 2015-04-30 2016-06-08 中国建筑第四工程局有限公司 High slope support method and structure
CN107130609A (en) * 2015-11-24 2017-09-05 叶长青 Without the basement supporting to support
CN107130607A (en) * 2015-11-24 2017-09-05 叶长青 Building basement supporting
CN107130618A (en) * 2016-04-12 2017-09-05 叶长青 Bank protection retaining structure construction method
CN105887895A (en) * 2016-06-08 2016-08-24 贵州正业工程技术投资有限公司 Foundation supporting device for reinforcing support through karst broken rock body
CN106284368A (en) * 2016-08-10 2017-01-04 兰州理工大学 A kind of recyclable assembled frame sawtooth anchor pole and construction method
CN106284368B (en) * 2016-08-10 2018-01-30 兰州理工大学 A kind of recyclable assembled frame sawtooth anchor pole and construction method
CN107748048A (en) * 2017-12-18 2018-03-02 兰州理工大学 Sash reinforcement with prestressed anchor side slope shaking table model device and construction method
CN109403355A (en) * 2018-08-31 2019-03-01 河海大学 A kind of novel side slope support system

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Application publication date: 20120125