CN205662796U

CN205662796U - Highway medium -and -large -sized solution cavity punishment structure that underlies

Info

Publication number: CN205662796U
Application number: CN201620264297.7U
Authority: CN
Inventors: 何忠明; 邢逸航; 吴贺鹏; 刘清芳; 刘森峙; 范海山; 杨卓栋; 刘帅; 李奕嫏
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2016-04-01
Filing date: 2016-04-01
Publication date: 2016-10-26
Anticipated expiration: 2026-04-01

Abstract

The utility model discloses a highway medium -and -large -sized solution cavity punishment structure that underlies, including geogrid (3), hunch (4), abut (5), stake (6). Laying hunchs (4) in solution cavity (7) top, encircleing the travel direction of putting the perpendicular road of direction of burying of (4), the vault should be apart from ground 1m~1.5m, and the span of hunch (4) should be greater than the span of solution cavity, in abut (5) that triangle -shaped was laid at the both ends of encircleing, abut (5) are greater than 3m with the probe distance of solution cavity (7) to pile (6) on the abut, lay above the vault geogrid (3), geogrid's the direction of laying for the horizontal direction, is laid the area and should be covered the projected area of solution cavity at the horizontal direction. The utility model aims to solve the technical problem that underlie medium -and -large -sized solution cavity to the potential safety hazard that highway exists to highway, provide a safe and reliable, economize on the use of funds, the punishment structure of comparatively environmental protection.

Description

A kind of Underlying Speedway medium-and-large-sized solution cavity treatment structures

Technical field

This utility model relates to a kind of Special Roadbed punishment field, at specifically a kind of medium-and-large-sized solution cavity of Underlying Speedway Control structure.

Background technology

Karst In China (karst) landforms are widely distributed, and Karst Problem is most important in the expressway construction of karst region One of engineering problem.Solution cavity is under the influence of by dynamic load, it is possible to makes its structure be destroyed, can cause molten time serious Hole top board ruptures suddenly thus causes the deformation of ground to cave in, and has a strong impact on the stability of road occupation.To Underlying Speedway Medium-and-large-sized solution cavity roadbed filling typically has two kinds of methods, 1. grouting reinforcement methods: it is closely knit that its principle mainly makes solution cavity fill, and reaches The stability of some strength, cuts off contacting of solution cavity and soil layer and subsoil water simultaneously, prevents the growth promoter of solution cavity, harm from building The safety of thing.Grouting reinforcement method is applicable to the process of the small-sized solution cavity of shallow embedding, if solution cavity is relatively big, relatively costly.Grouting reinforcement method pair Ecological environment also has bigger destruction.2. pile foundation facture: pile foundation is to process the method that karst foundation is the more commonly used, for Karsts developing area is more ripe, can use pile foundation.Pile Bearing Capacity is big, good stability, but high to construction process requirement, expense Expensive.

Summary of the invention

In order to solve above-mentioned technical problem, this utility model provides the punishment of a kind of new Underlying Speedway medium-and-large-sized solution cavity Structure.

The Underlying Speedway medium-and-large-sized solution cavity treatment structures that the utility model proposes include GSZ, arch, skewback, Stake.At solution cavity arch routed over, the burying of arch put direction should the travel direction of vertical road, vault away from ground 1m～1.5m, arch Span should be greater than the span of solution cavity；Lay skewback at the two ends of arch, skewback is more than 3m with the horizontal range of solution cavity；Above vault Lay GSZ.

Described GSZ uses steel plastic geogrid.GSZ is laid on dome portions, and laying direction is level side To, lay area and should cover solution cavity projected area in the horizontal direction.

Described arch uses steel reinforced concrete structure.The steel reinforced concrete that arch uses is to be welded with stirrup by arc I-steel Connect, pour C30 concrete and form.The two ends of arc I-steel should be welded mutually with the framework of steel reinforcement of skewback.

Described skewback uses the skewback of triangle.Skewback is to be skeleton by reinforcing bar and pours C40 concrete and form, and Drive piles on skewback.

Use above-mentioned treatment structures can reduce the solution cavity impact on foundation stability greatly.Compared with prior art Relatively, this utility model, by laying GSZ under ground, can to a certain degree reduce soil matrix differential settlement.Under GSZ Bury arch and skewback underground, the load force born is delivered to the soil body of surrounding, to reduce the load force that Upper Plate of Karst Cave is born.This reality With novel this solution cavity treatment structures is applied widely, safety is high, more environmental protection.

Accompanying drawing explanation

Fig. 1 is the elevational schematic view of Underlying Speedway medium-and-large-sized solution cavity roadbed filling new technique.

Fig. 2 is the structure section figure of arch.

Fig. 3 is the top view of Underlying Speedway medium-and-large-sized solution cavity roadbed filling new technique.

Detailed description of the invention

The utility model is described in further detail below in conjunction with the accompanying drawings.At a kind of medium-and-large-sized solution cavity of new Underlying Speedway Control structure, as it is shown in figure 1, Fig. 1 is plane graph of the present utility model, it can be seen that this process structure of the present utility model be Solution cavity arch routed over, the span of arch is more than the span of solution cavity, and vault is away from ground 1m～1.5m.Triangle arch is laid at the two ends of arch Seat, skewback piling ensures stablizing of skewback.Vault GSZ routed over, the laying direction of GSZ is level side To, lay area and should cover solution cavity projected area in the horizontal direction.

The karsts developing area of express highway roadbed bottom is detected first with geophysical probing technique or other Detection Techniques Situation, analyzes and understands the conditions such as the form of solution cavity, trend and size.Design situation according to this section of road combines the shape of solution cavity This structure bearing capacity under normal condition and limit state is divided by state, trend, size, position according to finite element method The parameters such as analysis calculates, and draws sagitta, span, thickness, arrangement of reinforcement, make design.

As in figure 2 it is shown, the sectional drawing that Fig. 2 is arch: arch uses steel reinforced concrete structure.Arch use steel reinforced concrete be by 24a# arc I-steel welds with stirrup, pours C30 concrete and forms.The two ends of arc I-steel should be with the framework of steel reinforcement of skewback Weld mutually.The span of arch and the ratio of arch span are between 4:1～3:1.The arc I-steel of every arch is distributed one every 0.5m, And stirrup is welded with I-steel.Burying direction underground and should being perpendicular to runway direction of arch, if solution cavity span is relatively big, then can examine Consider indirect type and bury the method for arch as it is shown on figure 3, the ratio of distance and arch span between two arches is about 1:1.

Skewback is placed on the two ends of arch, and skewback application reinforcing bar skeleton C40 concrete carries out pouring to be had enough with guarantee Comprcssive strength, skewback basis of should driving piles makes skewback sufficiently stable.Skewback and solution cavity horizontal range are at least 3m.If this area Soil property the loosest, need to carry out improveing or changing by the soil property around skewback filling out.

GSZ needs to meet that intensity is big, deform the features such as little, corrosion-resistant.GSZ uses steel plastic geogrid, Being laid on above vault, level is laid.GSZ and arch are carried out bind by the top steel wire rope at arch, the paving of GSZ If area should cover solution cavity projected area in the horizontal direction.

Claims

1. a Underlying Speedway medium-and-large-sized solution cavity treatment structures, is characterized in that: include GSZ (3), arch (4), skewback (5), stake (6), at solution cavity (7) arch routed over (4), arch (4) buries the travel direction putting the vertical road in direction, vault should be away from ground Face 1m～1.5m, the span of arch (4) is more than the span of solution cavity；Skewback (5), skewback (5) and solution cavity (7) is laid at the two ends of arch Horizontal range is more than 3m, and skewback (5) is to be skeleton by reinforcing bar and casting concrete forms, and drives piles (6) on skewback；At vault GSZ (3) is laid in top.

Underlying Speedway the most according to claim 1 medium-and-large-sized solution cavity treatment structures, is characterized in that: described geotechnological lattice Grid (3) use steel plastic geogrid, and GSZ (3) is laid on dome portions, and laying direction is horizontal direction, and laying area should cover Lid solution cavity projected area in the horizontal direction；GSZ and arch are carried out bind by the top steel wire rope at arch.

The most according to claim 1, Underlying Speedway medium-and-large-sized solution cavity treatment structures, is characterized in that: described arch employing type Steel-concrete structure, the steel reinforced concrete that arch uses is to be welded with stirrup (9) by arc I-steel (8), pours C30 concrete (10) form；The two ends of arc I-steel (8) should be welded mutually with the framework of steel reinforcement of skewback.

Underlying Speedway the most according to claim 1 medium-and-large-sized solution cavity treatment structures, is characterized in that: described skewback (5) triangle skewback is used.

Underlying Speedway the most according to claim 1 medium-and-large-sized solution cavity treatment structures, is characterized in that: described solution cavity (7) span along runway direction is relatively big, uses indirect type to bury the method for arch as it is shown on figure 3, distance between two arches (4) It is about 1:1 with the ratio of arch span.