CN203113335U - Counterfort type U-type groove retaining structure - Google Patents

Counterfort type U-type groove retaining structure Download PDF

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Publication number
CN203113335U
CN203113335U CN 201320092412 CN201320092412U CN203113335U CN 203113335 U CN203113335 U CN 203113335U CN 201320092412 CN201320092412 CN 201320092412 CN 201320092412 U CN201320092412 U CN 201320092412U CN 203113335 U CN203113335 U CN 203113335U
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China
Prior art keywords
base plate
counterfort
abutment
groove retaining
walls
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CN 201320092412
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Chinese (zh)
Inventor
姚洪锡
陈占
李海斌
杨喆
陈德平
邬强
刘庆辉
韦随庆
徐红星
葛先飞
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China Railway Siyuan Survey and Design Group Co Ltd
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China Railway Siyuan Survey and Design Group Co Ltd
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Abstract

The utility model discloses a counterfort type U-type groove retaining structure which comprises side walls and a base plate. The base plate comprises a base plate middle part and base plate overhanging parts, wherein the two sides of the middle part extend outward in the horizontal direction to form the overhanging parts. The side walls are fixed at the connecting positions among the base plate middle part and the base plate overhanging parts in an anchoring mode. Counterforts are arranged among the side walls and the base plate overhanging parts in an anchoring mode. The side walls, the base plate and the counterforts are all of a reinforced concrete structure. The counterforts are respectively mutually connected with steel bars in the side walls and the base plate. Due to the facts that according to the U-type groove retaining structure, the counterforts are arranged among the base plate overhanging parts and the side walls, and the side walls are connected with the base plate through the counterforts, and stiffening function is achieved, so that stress conditions of the side walls and the base plate are improved, rigidity and integrality of the structure are enhanced, and deformation of the side walls is reduced. In comparison with the type of a traditional U-type groove retaining structure, the counterfort type U-type groove retaining structure is especially suitable for U-type groove retaining structure roadbeds, wherein according to the roadbeds, due to the facts that the depth of a through cut is large, and the distance between the side of one of the side walls and the side of the other side wall is long, inner supports can not be arranged.

Description

The U-shaped groove retaining structure of counterfort formula
Technical field
The utility model relates to railway, highway subgrade construction project field, specifically refers to for the U-shaped groove retaining structure of the counterfort formula of railway, highway cutting engineering.
Background technology
U-shaped groove retaining structure is called closed cutting again, is applicable to that generally the groundwater seepage coefficient does not allow to reduce phreatic cutting greater than the water bearing ground of 5m/d and some cause specific, and its effect is to receive a slope retaining and sealing underground water.Common U-shaped groove retaining structure mainly is made up of reinforced concrete floor and steel concrete abutment wall, support the side slope soil pressure by abutment wall, by the deadweight of abutment wall, base arrangement and ancillary facility deadweight and where necessary by encorbelment base plate or uplift pile opposing buoyancy force of underground water is set under base plate, thereby maintenance stability of structure, guarantee the railway operation purpose of safety, in rich groundwater, groundwater table is higher and put the railway that the slope is restricted, the cutting location of highway has obtained extensive use.
At present, higher when U-shaped groove retaining structure abutment wall height, reach 8m and when above, be the outer lateral earth pressure of opposing abutment wall, adopt usually increase sidewall thickness or adopt in the method that supports.Increasing when sidewall thickness arrives to a certain degree needs wasteful dimension muscle and concrete, and this kind method economy is relatively poor; And adopt the method that adds interior support between two abutment walls when U-shaped groove inner width is big, can't realize.Therefore, U-shaped groove retaining structure had certain limitation when abutment wall was higher, had limited the applicable situation of the type retaining structure.
Summary of the invention
The purpose of this utility model is exactly to overcome the defective that prior art exists, a kind of rigidity that can improve U-shaped groove retaining structure when cutting abutment wall excessive height or abutment wall two lateral extents far can't arrange inner support is provided, improve the stress condition of abutment wall and base plate, thereby effectively reduce the steel concrete consumption, save the U-shaped groove retaining structure of counterfort formula of investment.
For achieving the above object, the utility model comprises abutment wall and base plate, described base plate comprises base plate mid portion and both sides along continuous straight runs thereof the base plate that the arranges part of encorbelmenting that stretches out, described abutment wall is anchored in the encorbelment junction of part of base plate mid portion and base plate, and its special character is: described abutment wall and base plate are encorbelmented, and anchoring has counterfort between the part.
Further, described abutment wall Vertical Anchor is fixed on the base plate.
Further, described counterfort is encorbelmented partly vertical with abutment wall or base plate.
Further, described abutment wall, base plate and counterfort are reinforced concrete structure, and the reinforcing bar in described counterfort and the abutment wall interconnects, and the reinforcing bar in described counterfort and the base plate interconnects.
Further, described counterfort arranges along base plate longitudinal separation.
The utility model employing is encorbelmented at the base plate of U-shaped groove retaining structure and between part and the abutment wall counterfort is set, and make counterfort respectively with abutment wall and base plate in reinforcing bar interconnect, by counterfort abutment wall and base plate are coupled together, play the effect of putting more energy into, thereby improve the stress condition of abutment wall and base plate, improve rigidity and the globality of structure, reduce the distortion of abutment wall.Abutment wall and counterfort can be considered the "T"-shaped variable cross-section semi girder that is anchored on the U-shaped trough floor, abutment wall is as the edge of a wing of "T"-shaped variable cross-section semi girder, effective molded breadth on its edge of a wing is widened gradually by the wall top is triangular in shape downwards, the rigidity of structure increases from top to bottom gradually, in order to resist moment of flexure and the shearing that soil pressure produces.This scheme adopts counterfort and the "T"-shaped as a whole variable cross-section semi girder of abutment wall, adopt thinner abutment wall size can satisfy the bending resistance of U-shaped groove retaining structure abutment wall, the designing requirement of shearing resistance, cover to banket on its base plate is encorbelmented partly and can play advantageous effect with counterfort again for anti-floating.Than traditional U-shaped groove retaining structure pattern, the U-shaped groove retaining structure of counterfort formula has tangible technology and economic advantages, is particularly useful for big, the U-shaped groove retaining structure roadbed when abutment wall two lateral extents far can't arrange inner support of the cutting degree of depth.
Description of drawings
Fig. 1 is the perspective view of the U-shaped groove retaining structure of a kind of counterfort formula.
Fig. 2 is the sectional structure schematic diagram of the U-shaped groove retaining structure of counterfort formula shown in Figure 1.
Among the figure: 1-abutment wall, 2-base plate (wherein: base plate mid portion 2.1, base plate encorbelment part 2.2), 3-counterfort.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
The U-shaped groove retaining structure of counterfort formula shown in Fig. 1 ~ 2, comprise abutment wall 1 and base plate 2, abutment wall 1 thickness is 1.2m, highly be 11m, base plate 2 thick 1.4m, base plate 2 comprise base plate main part 2.1 and both sides along continuous straight runs thereof the base plate that the arranges part 2.2 of encorbelmenting that stretches out, abutment wall 1 Vertical Anchor is fixed in the encorbelment junction of part 2.2 of base plate main part 2.1 and base plate, abutment wall 1 and the base plate intrinsic counterfort 3 of Vertical Anchor between the part 2.2 of encorbelmenting, counterfort 3 thickness are 0.8m, longitudinally 4.5m arranges at interval; Abutment wall 1, base plate 2 and counterfort 3 are reinforced concrete structure, and the reinforcing bar in counterfort 3 and the abutment wall 1 interconnects, and the reinforcing bar in counterfort 3 and the base plate 2 interconnects.Each position steel bar overall binding and concrete perfusion.
The work progress of the U-shaped groove retaining structure of the utility model counterfort formula is as follows:
1) excavation of foundation pit: according to concrete geological conditions adopt put the slope excavation or adopt precipitation and temporary lining measure after excavation pit, in the thick C25 plain concrete cushion layer of foundation ditch bottom pouring 0.2m, and lay 1~2 layer of waterproof roll;
2) main structure construction; After determining base plate 2 positions and size, each position reinforcing bar of colligation, it is firm to guarantee to connect, and fixedly steel limit rubber fastening band, the member that the pre-buried abutment wall in abutment wall 1 top is connected with superstructure, formwork erection and concrete perfusion are then located in the shrinkage joint.When the overall structure size is bigger, when concrete need repeatedly pour into, should constuction joint be set by the standard waterproof requirement;
3) concrete curing and form removable: after concrete perfusion finishes, arrange the special messenger that concrete is carried out maintenance, treat that then concrete strength reaches stripping after the designing requirement, should avoid during stripping concrete surface and edges and corners are produced damage;
4) wall back of the body backfill and backfill face slope protection; Lay the outer waterproof roll of abutment wall and waterproof roll topping by designing requirement, carry out the backfill of the wall back of the body then, backfill face is prevented namely forming the U-shaped groove retaining structure of counterfort formula after draining is handled.
The utility model employing is encorbelmented at the base plate of U-shaped groove retaining structure and between part 2.2 and the abutment wall 1 counterfort 3 is set, and make counterfort 3 respectively with abutment wall 1 and base plate 2 in reinforcing bar interconnect, by counterfort 3 abutment wall 1 and base plate 2 are coupled together, play the effect of putting more energy into, thereby improve the stress condition of abutment wall 1 and base plate 2, improve rigidity and the globality of structure, reduce the distortion of abutment wall 1.Abutment wall 1 can be considered the "T"-shaped variable cross-section semi girder that is anchored on the U-shaped trough floor with counterfort 3, abutment wall is as the edge of a wing of "T"-shaped variable cross-section semi girder, effective molded breadth on its edge of a wing is widened gradually by the wall top is triangular in shape downwards, the rigidity of structure increases from top to bottom gradually, in order to resist moment of flexure and the shearing that soil pressure produces.This scheme adopts counterfort 3 and the "T"-shaped as a whole variable cross-section semi girder of abutment wall 1, adopt thinner abutment wall size can satisfy the bending resistance of U-shaped groove retaining structure abutment wall 1, the designing requirement of shearing resistance, its base plate is encorbelmented to cover on the part 2.2 and is banketed and counterfort 3 can play advantageous effect again for anti-floating.Than traditional U-shaped groove retaining structure pattern, the U-shaped groove retaining structure of counterfort formula has tangible technology and economic advantages, is particularly useful for big, the U-shaped groove retaining structure roadbed when 1 liang of lateral extent of abutment wall far can't arrange inner support of the cutting degree of depth.

Claims (5)

1. U-shaped groove retaining structure of counterfort formula, comprise abutment wall (1) and base plate (2), described base plate (2) comprises base plate mid portion (2.1) and both sides along continuous straight runs thereof the base plate that the arranges part (2.2) of encorbelmenting that stretches out, described abutment wall (1) is anchored in the encorbelment junction of part (2.2) of base plate mid portion (2.1) and base plate, it is characterized in that: described abutment wall (1) and base plate are encorbelmented partly, and anchoring has counterfort (3) between (2.2).
2. the U-shaped groove retaining structure of counterfort formula according to claim 1, it is characterized in that: described abutment wall (1) Vertical Anchor is fixed on the base plate (2).
3. the U-shaped groove retaining structure of counterfort formula according to claim 1 is characterized in that: described counterfort (3) and abutment wall (1) or the base plate part (2.2) of encorbelmenting is vertical.
4. the U-shaped groove retaining structure of counterfort formula according to claim 1, it is characterized in that: described abutment wall (1), base plate (2) and counterfort (3) are reinforced concrete structure, reinforcing bar in described counterfort (3) and the abutment wall (1) interconnects, and the reinforcing bar in described counterfort (3) and the base plate (2) interconnects.
5. according to the U-shaped groove retaining structure of the described counterfort formula of arbitrary claim in the claim 1 to 4, it is characterized in that: described counterfort (3) is along base plate (2) longitudinal separation setting.
CN 201320092412 2013-02-28 2013-02-28 Counterfort type U-type groove retaining structure Active CN203113335U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320092412 CN203113335U (en) 2013-02-28 2013-02-28 Counterfort type U-type groove retaining structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320092412 CN203113335U (en) 2013-02-28 2013-02-28 Counterfort type U-type groove retaining structure

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CN203113335U true CN203113335U (en) 2013-08-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105714633A (en) * 2016-02-05 2016-06-29 中国土木工程集团有限公司 U-shaped retaining structure for fill subgrade and construction method of U-shaped retaining structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105714633A (en) * 2016-02-05 2016-06-29 中国土木工程集团有限公司 U-shaped retaining structure for fill subgrade and construction method of U-shaped retaining structure

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