CN202899165U

CN202899165U - T-shaped wallboard type retaining wall structure of highway subgrade

Info

Publication number: CN202899165U
Application number: CN 201220470154
Authority: CN
Inventors: 徐宇光; 江仁庆; 周晓红; 叶如高; 陈美仁; 郑前峰; 李天哲; 郑同洋
Original assignee: ZHEJIANG BAYONG HIGHWAY ENGINEERING Co Ltd
Current assignee: ZHEJIANG BAYONG HIGHWAY ENGINEERING Co Ltd
Priority date: 2012-09-17
Filing date: 2012-09-17
Publication date: 2013-04-24
Anticipated expiration: 2022-09-17

Abstract

The utility model relates to a T-shaped wallboard type retaining wall structure of a highway subgrade. The T-shaped wallboard type retaining wall structure of the highway subgrade is characterized in that shallow-layer reinforcement is firstly conducted on a foundation so that a cement soil reinforcement area is formed, a prefabricated T-shaped wallboard is arranged on one side or both sides of the subgrade in a hit mode before initial setting of cement, after through hole reinforcement ribs and steel ties are arranged, bubble concrete is poured into the prefabricated T-shaped wallboard, construction of subgrade filling in the central area of an embankment is conducted after the bubble concrete reach certain strength, then construction on a road surface and a guardrail are conducted, and the elevation of the top of the road surface is flush with that of the top of a flange of the prefabricated T-shaped wallboard. The prefabricated T-shaped wallboard is made of reinforced concrete, and is composed of the flange and a rib board, wherein the top of the rib board is lower than the top of the flange, the bottoms of the rib board and the flange are flush, a concave tenon groove and a convex tenon groove are respectively formed in two sides of the flange, two or more lacing holes and water discharge holes are preserved in the flange in a symmetrical and even mode, and two or more reinforcement rib through holes are formed in the rib board. The T-shaped wallboard type retaining wall structure of the highway subgrade has the advantages of being small in occupied space, fast in construction speed, small in subgrade settlement, good in stability, and the like.

Description

A kind of highway subgrade T shape wallboard type wall-retaining structure

Technical field

The utility model relates to a kind of highway subgrade T shape wallboard type wall-retaining structure, belongs to the highway engineering field.

Technical background

Retaining wall refers to support Roadbed Soil or the hillside soil body, prevents from banketing or the structure of soil deformation unstability, is widely used in around highway, railway slope, the protection of hydraulic engineering bunding, the building, in the engineering such as tunnel, mine.Different according to its rigidity and displacement mode, can be divided into rigid retaining wall, flexible retaining wall and temporary supporting three classes; Different according to setting position, be divided into curb wall, embankment wall, cutting wall and hillside wall etc., the retaining wall that wherein is arranged at side slope of embankment is called the embankment wall; The retaining wall that the wall top is positioned at curb is called the curb wall; The retaining wall that is arranged at cut slope is called the cutting wall; Be arranged on the hillside, the covering layer soil body that may cave on the supporting hillside or the retaining wall of broken rock are called the hillside wall.

Retaining wall can reduce earth and rock works amount and floor space in order to stablize embankment and cut slope in highway engineering, prevents current scour roadbed etc., and common retaining wall has gravity, cantilevered, buttress type, empty van formula and sheet pile formula etc.Sheet-pile retaining wall can be divided into cantilevered and anchoring type two large classes by form of structure, can be used for permanent or provisional soil-baffling structure, and the top of cantilever sheet pile wall is free end, and the bottom is fixed on below ground, utilizes to insert and partly keeps whole machine balancing in the soil; Anchored sheet pile wall adds length and the section that one grappling pull bar then insert in the soil and can greatly reduce near top or top; Sheet-pile retaining wall is compared with gravity retaining wall, its light in structure, flexible large, the advantage such as the few cost of engineering quantity is low.

Reinforced earth retaining wall is comprised of filler, the lacing wire of arranging in filler and shingle nail three parts, in filler soil, add lacing wire, can utilize the rubbing action between lacing wire and the soil, improve the deformation condition of the soil body and the engineering properties of the raising soil body, thereby reach the purpose of stablizing the soil body, and, reinforced earth is the flexible structure thing, can adapt to the slight distortion of ground, it is little that the foundation deformation that causes of banketing is compared other works to the stability influence of reinforced earth retaining wall, and the processing of ground is also easier; Advantages such as having good anti-seismic performance, save to take up an area, be handsome in appearance, cheap.

Summary of the invention

The purpose of this utility model is to provide a kind of and is applicable to that construction land is limited can't normally put by design the T shape wallboard type wall-retaining structure of the highway engineering on slope, and combination utilizes the advantage of sheet-pile retaining wall, reinforced earth retaining wall, T shape wallboard, cellular concrete.

To achieve these goals, the utility model has adopted following technical scheme:

A kind of highway subgrade T shape wallboard type wall-retaining structure is characterized in that at first ground being carried out shallow layer reinforcement, forms the cement-soil stabilization zone, sets prefabricated T shape wallboard before the cement initial set in the roadbed one or both sides;

Prefabricated T shape wallboard is comprised of vertically disposed wing plate and floor, and the wing plate both sides arrange isodiametric sunk coak and tenon groove with connecting respectively, is symmetrical in floor at wing plate an above lacing hole and drain hole evenly are set; Arrange the reinforcement through hole at floor;

Perforation reinforcement and socketing is interspersed after reinforcing bar passes respectively reinforcement through hole on the floor and the lacing hole on the wing plate, at the inboard perfusion of prefabricated T shape wallboard cellular concrete, treat that cellular concrete reaches the roadbed filling construction of the laggard walking along the street dike of some strength central area, and then carry out road surface and guardrail construction.

Aforesaid highway subgrade T shape wallboard type wall-retaining structure, it is characterized in that described drain hole is higher than the original ground absolute altitude, gutter is set in the drain hole, and gutter medial end employing anti-filter geotextiles parcel, be arranged in prefabricated T shape wallboard and set more than the rear cement-soil stabilization zone.

Aforesaid highway subgrade T shape wallboard type wall-retaining structure, the floor that it is characterized in that prefabricated T shape wallboard is concordant with the wing plate bottom, and the top of floor is lower than wing plate, and the discrepancy in elevation at both tops is road surface thickness.

Aforesaid a kind of highway subgrade T shape wallboard type wall-retaining structure is characterized in that the outer end that sockets reinforcement arranges fixed end.

The structure that the utility model relates to has the following advantages and beneficial effect:

(1) T shape wallboard has larger specific area and bending rigidity, be conducive to give full play to side friction and horizontal resist forces, vertical and the horizontal bearing performance is good, adopt reinforced concrete prefabricated forming, quality is easy to control, speed of application is fast, the setting of the concavo-convex tongue-and-groove of while wing plate both sides semicircle, T shape wallboard is constructed, and rear mutually linking is tight, holistic resistant behavior is good.

(2) by reserve lacing hole, floor reservation reinforcement through hole at T shape wallboard wing plate, perforation reinforcement and the laying that sockets reinforcing bar have been made things convenient for.

When (3) setting of cement-soil stabilization zone is convenient to T shape wallboard and is set construction, collaboratively adopt cellular concrete to recharge certain area to have alleviated roadbed weight, subgrade settlement is little, resistance to overturning good.

(4) setting of drain hole can make the roadbed internal water accumulation in time get rid of on the T shape wallboard wing plate, when reducing subgrade stability hidden danger, can effectively overcome the generation of the disease such as roadbed frost boiling.

Description of drawings

Fig. 1 is T shape wallboard type barricade schematic diagram;

Fig. 2 is highway subgrade T shape wallboard type wall-retaining structure horizontal slice figure;

Fig. 3 is that Fig. 2 is along the section sectional drawing of A-A line;

Fig. 4 is that Fig. 2 is along the section sectional drawing of B-B line;

Among the figure: 1-wing plate, 2-floor, the semicircle sunk coak of 3-, the semicircle tenon groove of 4-, 5-reinforcement through hole, 6-lacing hole, 7-drain hole, 8-socket the reinforcement fixed end, the 9-reinforcement of boring a hole, 10-sockets reinforcement, the 11-cellular concrete, 12-roadbed filling, 13-road surface, 14-cement-soil stabilization zone, the 15-guardrail.

Specific embodiment

T shape wallboard distributed steel requirement and precasting process, cement-soil stabilization zone construction process requirement, reinforcing bar welding and the contents such as colligation requirement, roadbed filling and pavement construction requirement are not repeated in the present embodiment, and emphasis is set forth the embodiment that the utility model relates to structure.

Fig. 1 is T shape wallboard type barricade schematic diagram, and Fig. 2 is highway subgrade T shape wallboard type wall-retaining structure horizontal slice figure, Fig. 3 be Fig. 2 along the section sectional drawing of A-A line, Fig. 4 is that Fig. 2 is along the section sectional drawing of B-B line; Shown in Fig. 1,2,3,4, a kind of highway subgrade T shape wallboard type wall-retaining structure, at first ground is carried out shallow layer reinforcement, form cement-soil stabilization zone 14, set prefabricated T shape wallboard before the cement initial set in the roadbed one or both sides, prefabricated T shape wallboard embeds the degree of depth of cement-soil stabilization zone 14 and determines that by Stability Checking the present embodiment insert depth is 1200mm.

Prefabricated T shape wallboard is comprised of vertically disposed wing plate 1 and floor 2, floor 2 is concordant with wing plate 1 bottom, and the top of floor 2 is lower than wing plate 1, wing plate 1 both sides arrange semicircle sunk coak 3 and semicircle tenon groove 4 with connecting respectively, when a plurality of prefabricated T shape wallboards are used in combination, make up with sunk coak 3 and tenon groove 4 chimeric modes, therefore sunk coak 3 identical with tenon groove 4 diameters (75mm), being symmetrical in

floor lacing hole

6 and 2 diameters that 6 diameters evenly are set is 25mm at wing plate 1 is 113mm drain hole 7; Drain hole 7 is higher than original ground absolute altitude 550mm, and drain hole 7 is interior to arrange the PVC gutter, and PVC gutter medial end adopts anti-filter geotextiles parcel, and PVC gutter pipe external diameter is that 110mm, wall thickness are 3.2mm.Arrange that at floor 2 10 diameters are 21mm reinforcement through hole 5, lacing hole 6 and reinforcement through hole 5 are arranged in drain hole more than 7.

Perforation reinforcement 9 and socketing distributes after reinforcing bar 10 passes respectively reinforcement through hole 5 on the floor and the lacing hole 6 on the wing plate alternately, at the inboard perfusion of prefabricated T shape wallboard cellular concrete 11, socket the reinforcement medial end to the inboard sideline of cellular concrete, treat that cellular concrete 11 reaches 12 constructions of the laggard walking along the street dike of some strength central area roadbed filling, and then carrying out road surface 13 and guardrail 14 constructions, road surface 13 top marks are high to be flushed with prefabricated T shape wallboard wing plate 1 top mark height;

Cellular concrete 11 adopts unit weights to be not more than 6KN/m3, Mined scale strength should satisfy 28 days intensity 〉=0.8Mpa, degree of mobilization at 180mm ± 20mm.

Prefabricated T shape wallboard material is C25 steel concrete, and wing plate 1 thickness is that 200mm, width are that 1000mm, length are 4180mm, and floor 2 thickness are that 200mm, width are that 1000mm, length are 4000mm.The height that floor 3 tops are lower than wing plate 1 top is the thickness of road surface structare layer, and its value is 180mm.

Cement-soil stabilization zone 14 degree of depth are 2500mm, after taking former foundation soil dug out, form with backfill behind the even mix of cement, and mixing the ash amount is 8%.

Socketing reinforcement 10 employing diameters is the hot rolled ribbed steel bar of 22mm, socket reinforcement fixed end 8 in the setting of T shape wallboard wing plate lateral surface, socketing the reinforcement fixed end 8 employing length of sides is that 80mm, wall thickness are the square plate of 10mm, and with socket reinforcement 10 outboard end firm welding, socket reinforcement 10 medial ends to cellular concrete 11 inboard sidelines.It is the hot rolled ribbed steel bar reinforcing bar of 18mm that perforation reinforcement 9 adopts diameter, runs through the lacing hole 6 of floor 2 reservations of T shape wallboard.

Claims

1. a highway subgrade T shape wallboard type wall-retaining structure is characterized in that at ground shallow the cement-soil stabilization zone being set, and sets prefabricated T shape wallboard in the roadbed one or both sides;

Perforation reinforcement and socketing is interspersed after reinforcing bar passes respectively reinforcement through hole on the floor and the lacing hole on the wing plate, at the inboard perfusion of prefabricated T shape wallboard cellular concrete.

2. highway subgrade T shape wallboard type wall-retaining structure according to claim 1, it is characterized in that described drain hole is higher than the original ground absolute altitude, gutter is set in the drain hole, and the gutter medial end adopts anti-filter geotextiles parcel, and lacing hole and reinforcement through hole are arranged in prefabricated T shape wallboard and set more than the rear cement-soil stabilization zone.

3. highway subgrade T shape wallboard type wall-retaining structure according to claim 1 is characterized in that the floor of prefabricated T shape wallboard is concordant with the wing plate bottom, and the top of floor is lower than wing plate, and the discrepancy in elevation at both tops is road surface thickness.

4. a kind of highway subgrade T shape wallboard type wall-retaining structure according to claim 1 is characterized in that the outer end that sockets reinforcement arranges fixed end.