CN217758142U - Structure is widened to half pin-connected panel road bed - Google Patents

Abstract

The embodiment of the application provides a structure is widened to half pin-connected panel road bed belongs to road engineering technical field, include: a reinforced concrete retaining wall; and the cast-in-situ bored pile is fixedly connected to the lower surface of the wall floor of the reinforced concrete retaining wall. Reinforced concrete barricade is prefabricated type of falling T, and a reinforced concrete barricade corresponds threely the bored concrete pile, and is three the bored concrete pile is located the both sides of the vertical wall of the type of falling T reinforced concrete barricade respectively, and the wall floor of the type of falling T reinforced concrete barricade has the wall floor preformed hole with the bored concrete pile one-to-one, and the part that the embedded bar stretches out stretches into in the wall floor preformed hole, and will fall T type reinforced concrete barricade and bored concrete pile fixed connection through concreting, and the effectual current road bed retaining structure of having solved has that the construction cycle is long, the interference is big and construction cost is high problem.

Description

Structure is widened to half pin-connected panel road bed

Technical Field

The application relates to the technical field of road engineering, in particular to a semi-assembled roadbed widening structure.

Background

In the construction and the transformation of a railway engineering roadbed section, along with the daily accumulation and the monthly accumulation of post-construction settlement, the daily maintenance of the embankment of the soft soil section needs to continuously fill ballast, the width of a road shoulder is slowly narrowed, and under severe conditions, no road shoulder exists, so that railway maintenance workers cannot walk on the road shoulder.

At present, the ballast has the conditions of serious filler scattering loss along the slope, short operation period and high maintenance difficulty, and in addition, in the electrified upgrading and transforming engineering of a plurality of internal combustion locomotives, equipment such as a power communication cable trough embedded in the shoulder of the road and the like also needs to widen the shoulder of the road.

The existing roadbed widening method mainly comprises the steps of digging steps and roadbed slope width with the same slope rate, changing the original slope rate local slope width through reinforcing soil bodies such as anchor rods, grids and the like, additionally arranging retaining measures such as embankment/shoulder retaining walls, L-shaped walls and the like. Under the situation of the current shortage of engineering construction land, the land acquisition and removal quantity and the engineering construction cost are correspondingly increased while the width of the roadbed is increased according to the existing roadbed side width processing method. In addition, most of the existing roadbed retaining structures are in a cast-in-place mode, and the problems of long construction period, large interference and high construction cost exist. Therefore, there is an urgent need for a novel roadbed widening structure form which does not use newly-added land as a premise, ensures the normal operation safety of railways, and can reduce construction period and reduce construction interference, which is a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In order to solve one of the above-mentioned background art defects, the embodiment of the present application provides a structure is widened to half pin-connected panel road bed.

The embodiment of the application provides half pin-connected panel road bed widens structure, include:

a reinforced concrete retaining wall;

and the cast-in-situ bored pile is fixedly connected to the lower surface of the wall floor of the reinforced concrete retaining wall.

Furthermore, the reinforced concrete retaining wall is prefabricated inverted T-shaped, one reinforced concrete retaining wall corresponds to three cast-in-situ bored piles, and the three cast-in-situ bored piles are respectively positioned on two sides of the vertical wall of the inverted T-shaped reinforced concrete retaining wall; the wall floor is located the part of vertical wall both sides is the wall floor outside and wall floor inboard respectively, wherein, the lower surface in the wall floor outside is provided with two drilling bored concrete piles, the inboard lower surface in wall floor is provided with a drilling bored concrete pile.

Furthermore, the three cast-in-situ bored piles are respectively fixed on the lower surface of the wall and the floor in a triangular staggered manner.

Furthermore, embedded steel bars are arranged in the cast-in-situ bored pile and extend out of the top end face of the cast-in-situ bored pile; the wall and floor of the inverted T-shaped reinforced concrete retaining wall is provided with wall and floor preformed holes which correspond to the cast-in-place bored piles one by one; the part that embedded steel bar stretches out stretches into in the wall floor preformed hole, and will through concreting fall T shaped steel reinforced concrete barricade with drilling bored concrete pile fixed connection.

Furthermore, the inverted T-shaped reinforced concrete retaining wall comprises three cast-in-place piles corresponding to the inverted T-shaped reinforced concrete retaining wall, only two cast-in-place piles and one inverted T-shaped reinforced concrete retaining wall, and further comprises a steel pipe sleeve; the steel pipe sleeve is respectively arranged at the end parts of the cast-in-situ bored pile and an inverted T-shaped reinforced concrete retaining wall for protecting the cast-in-situ bored pile outside from concrete pouring and preventing hole collapse.

Furthermore, the diameter of the cast-in-situ bored pile is greater than or equal to 0.3m and less than or equal to 0.5m, and the length of the cast-in-situ bored pile is greater than or equal to 2m and less than or equal to 5m.

Furthermore, the cast-in-situ bored pile is a miniature cast-in-situ bored pile.

Furthermore, be equipped with the outlet on the vertical wall bottom surface of falling T shaped steel reinforced concrete barricade.

Furthermore, the top of the vertical wall of the inverted T-shaped reinforced concrete retaining wall is provided with a protective rail fixing structure for fixing a protective rail.

Furthermore, the inverted T-shaped reinforced concrete retaining wall is provided with a plurality of sections, and the side walls of two adjacent sections of inverted T-shaped reinforced concrete retaining walls are connected by adopting a tenon structure.

Adopt the structure is widened to half pin-connected panel road bed that provides in this embodiment, beneficial effect lies in:

1. the roadbed is widened by adopting a mode of arranging a supporting structure only at the road shoulder without changing the slope toe, construction in the red line of the existing railway land is ensured, and land occupation is avoided.

2. The construction is carried out manually or by small machinery, so that the excavation or filling of the earth of the existing roadbed is reduced, the stability and safety of the existing roadbed are ensured, and the construction interference is reduced.

3. The prefabricated assembled supporting and retaining structure in a factory is adopted to reduce the maintenance time of cast-in-place concrete, and the construction is carried out in a centralized hoisting mode on site, so that the construction period is greatly shortened.

4. The structural characteristics of the miniature pile are fully utilized, the stress system of the supporting and blocking structure is adjusted, the masonry amount is reduced, a large amount of earthwork is avoided, and the cost is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic cross-sectional view of a widened structure of a semi-assembled roadbed provided by an embodiment of the application.

Fig. 2 is a schematic longitudinal section view of a half-fabricated roadbed widening structure provided by the embodiment of the application.

Fig. 3 is a schematic plan view of a half-fabricated roadbed widening structure provided in the embodiment of the application.

Fig. 4 is a schematic view of a semi-assembled roadbed widened structure prefabricated inverted T-shaped reinforced concrete retaining wall structure provided by the embodiment of the application.

The numbering in the figures illustrates: 1. a reinforced concrete retaining wall; 2. drilling a cast-in-place pile; 3. connecting holes are reserved in the wall and floor; 4. steel casing; 5. a drain hole; 6. a cable trough; 7. a pedestrian walkway; 8. a guard rail; 9. backfilling broken stones; 10. excavating a line on the side slope; 11. rail top; 12. ballast; 13. settling and repairing the ballast; 14. a surface layer of the foundation bed; 15. a foundation bed bottom layer; 16. a body; 17. originally designing a roadbed surface; 18. a current road base surface; 19. designing a slope surface originally; 20. the current situation of the slope; 21. a ground line.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the process of realizing the application, the inventor finds that most of the existing roadbed retaining structures are in a cast-in-place mode, and the problems of long construction period, large interference and high construction cost exist.

To the above problem, the embodiment of the application provides a structure is widened to half pin-connected panel road bed.

Fig. 1 is a schematic cross-sectional view of a half-fabricated roadbed widening structure provided in an embodiment of the application.

As shown in fig. 1, the embodiment of the present application provides a structure is widened to half pin-connected panel road bed includes:

a reinforced concrete retaining wall 1;

and the cast-in-situ bored pile 2 is fixedly connected to the lower surface of the wall floor of the reinforced concrete retaining wall 1.

The reinforced concrete retaining wall 1 needs to be prefabricated in advance, the roadbed widens the earth pressure of the side-filling part and the upper load acts on the prefabricated inverted reinforced concrete retaining wall 1, the earth pressure and the upper load are transmitted to the cast-in-situ pile 2 connected with the reserved connecting hole of the wall bottom plate through the structural form of the prefabricated reinforced concrete retaining wall 1, the prefabricated reinforced concrete retaining wall 1 and the cast-in-situ pile 2 are fixedly connected by adopting a post-pouring method, the shearing resistance and tensile resistance of the cast-in-situ pile 2 are fully utilized, the stress form of the traditional L-shaped retaining wall or road shoulder wall is optimized and adjusted, the traditional L-shaped retaining wall or road shoulder wall is not controlled and limited by the foundation burial depth, the side slope excavation depth and the earth filling load are reduced, the outer cast-in-situ pile 2 mainly bears the vertical load of the heel effect of the wall, and the inner cast-in-situ pile 2 mainly bears the vertical load of the toe effect of the wall.

As shown in fig. 2-4, the reinforced concrete retaining wall 1 is a prefabricated inverted T-shaped retaining wall, one reinforced concrete retaining wall 1 corresponds to three cast-in-place bored piles 2, and the three cast-in-place bored piles 2 are respectively located on two sides of a vertical wall of the inverted T-shaped reinforced concrete retaining wall 2; the parts of the wall and the floor, which are positioned on two sides of the vertical wall, are respectively the outer side of the wall and the floor and the inner side of the wall and the floor, wherein the lower surface of the outer side of the wall and the floor is provided with two cast-in-situ bored piles 2, and the lower surface of the inner side of the wall and the floor is provided with one cast-in-situ bored pile 2;

the three cast-in-situ bored piles 2 are respectively fixed on the lower surface of the wall and the floor in a triangular staggered manner.

Have embedded bar just in bored concrete pile 2 embedded bar stretches out from bored concrete pile 2's top face, and the wall floor of falling T shaped steel reinforced concrete barricade 1 has the wall floor preformed hole 3 with bored concrete pile 2 one-to-one, and the part that embedded bar stretches out just will fall T shaped steel reinforced concrete barricade 1 and 2 fixed connection of bored concrete pile through concreting in stretching into wall floor preformed hole 3.

Three cast-in-situ pile 2 that an inverted T shaped reinforced concrete barricade 1 corresponds, only two cast-in-situ piles 2 and an inverted T shaped reinforced concrete barricade 1 still include steel pipe sleeve 4, and steel pipe sleeve 4 sets up respectively in two cast-in-situ piles 2 and the tip of an inverted T shaped reinforced concrete barricade 1 fixed connection for protect outside cast-in-situ pile 2 concrete placement, prevent the hole collapse.

The diameter of the cast-in-situ bored pile 2 is greater than or equal to 0.3m and less than or equal to 0.5m, and the length of the cast-in-situ bored pile 2 is greater than or equal to 2m and less than or equal to 5m. The pile body is made of cast-in-place reinforced concrete, one end of a prefabricated inverted T-shaped reinforced concrete retaining wall 1 is arranged on a wall bottom plate, the outer side of the wall bottom plate is arranged between an original design slope surface 19 and a current situation slope surface 20, the end of the current situation slope surface 20 is provided with a rail top 11, the inner side of the wall bottom plate is arranged between a settlement supplement ballast 13 and a foundation bed surface layer 14, one end of an embedded steel bar passing through a wall floor reserved connecting hole 3 penetrates through the foundation bed surface layer 14 to fixedly connect the inverted T-shaped reinforced concrete wall 1 and a micro cast-in-situ pile 2, the other end of the micro cast-in-situ pile 2 penetrates through the foundation bed bottom layer 15 to extend to a position between a body 16 and a ground line 21, steel sleeves 4 are arranged at the connecting ends of the two cast-in-situ concrete retaining walls 2 and the inverted T-shaped reinforced concrete retaining wall 1, and the steel sleeves 4 are used for wrapping the joints of the two cast-in-situ cast-situ concrete retaining piles 2 and preventing hole collapse.

Prefabricated type of falling T reinforced concrete barricade 1 is equipped with the multisection, adopt tenon structural style to connect between the adjacent two sections prefabricated type of falling T reinforced concrete barricade 1 lateral wall, be equipped with outlet 5 on the vertical wall bottom surface of prefabricated type of falling T reinforced concrete barricade 1, outlet 5 locates on the wall floor surface that prefabricated type of falling T barricade 1 set up a bored concrete pile 2, prefabricated type of falling T reinforced concrete barricade 1 and present situation are between domatic 20, all be equipped with backfill rubble 9 between prefabricated type of falling T reinforced concrete barricade 1 and side slope excavation line 10, pre-buried cable duct 6 in the backfill rubble 9.

The prefabricated inverted T-shaped reinforced concrete retaining wall 1 is further provided with a pedestrian path 7 and a protective guardrail fixing structure for fixing the protective guardrail 8.

Prevent that guardrail bar 8 locates on the other end of prefabricated type of falling T reinforced concrete barricade 1, the other end of prefabricated type of falling T reinforced concrete barricade 1 is higher than original design roadbed surface 17, is equipped with railway ballast 12 on the original design roadbed surface 17. The current situation is that the roadbed 18 sinks relative to the original designed roadbed 17;

the operation process of the embodiment of the application is as follows: calculating the structure size of the retaining wall, the pile diameter of the drilled pile, the pile length, the pile spacing, the arrangement form and the reinforcing bars according to the road grade, the filling height, the vehicle load, the filling property, the sedimentation deformation requirement and the like, and prefabricating the inverted T-shaped retaining wall in a component factory in a centralized and sectional manner according to the calculation result, and simultaneously reserving connecting holes, connecting foundations and the like.

And erecting a scaffold on the slope surface of the side slope or forming an outer side drilling construction operation platform at the road shoulder by adopting a suspension arm device. The sectional groove jumping excavation curb, the excavation depth is not more than 0.6m, forms inboard drilling construction operation platform, adopts small-size geological drilling machine or artifical handheld drilling machine to dig the drilling soon, and the outside is close to domatic drilling local exposed section and adopts steel casing dado, makes the steel reinforcement cage and reserves connecting reinforcement, transfers the steel reinforcement cage and pours the concrete to the design elevation, pours about 0.1m of pile bolck screed-coat thickness simultaneously.

After the strength of a pile body reaches the design requirement, the prefabricated inverted T-shaped retaining wall is placed on a leveling layer through hoisting operation, the concave-convex part of each retaining wall is tightly butted, a pile top connecting steel bar penetrates through a retaining wall bottom plate preformed hole, high-strength rapid-hardening concrete is poured in the preformed hole for connection after the preformed connecting steel bar is bent, after the concrete in the preformed connecting hole reaches the design strength, a reversed filtering layer and filler are backfilled behind the wall, pre-embedded components such as a cable groove and the like are synchronously implemented, the next retaining wall and a drilled pile are implemented in a circulating mode, and after the retaining wall is communicated, additional facilities such as wall top railings, sidewalks and sidewalks are implemented.

Compared with the prior art, the embodiment of the application has the following beneficial effects:

1. without new solicitation: the action part of the prefabricated inverted T-shaped retaining wall combined with the structure form of micro drilling perfusion is only in the road shoulder widening range, and the change of the toe form is not involved. The requirement of widening the roadbed is met, the existing red line of the land is not exceeded, and a new land is not needed.

2. Reducing construction interference: by adopting the miniature cast-in-situ bored pile as a main foundation form, the excavation and backfilling amount of the earth and stone of the existing road are greatly reduced, and the construction of a large machine on the road is avoided. Compared with the existing roadbed widening technology and scheme, the roadbed widening method can be used for construction under the operation condition of ensuring driving safety, and effectively reduces construction interference.

3. Shortening the construction period: by adopting the prefabricated inverted T-shaped retaining wall structure form, factory standardized mass production can be realized, and the solidification period of cast-in-place concrete is controlled in the production period of a prefabricated factory. And multiple-section centralized hoisting operation is adopted on site, so that the construction period on site is effectively shortened.

4. The cost is saved: under the condition of meeting the same technical requirements, compared with the traditional roadbed side width and retaining scheme, the volume of earth and stone per kilometer of the embodiment of the application is reduced by more than 90%, the masonry is reduced by more than 50%, and the cost control of the scheme is about 60-80% of the cost of the traditional scheme, as shown in the following table.

TABLE 1 roadbed slope width per kilometer main engineering cost

Promote the curb structure service function: this structural style can be at the pre-buried stand railing basis of prefabricated type of falling T barricade wall top, and the road shoulder guard rail is prevented in the implementation in step, plays and seals the road effect of keeping apart. In addition, the inside cable tray that can pre-buried, lay accessory facilities such as pedestrian's footpath of barricade, promote the shoulder structure service function.

In the description of the embodiments of the present application, the terms "disposed," "connected," and the like, should be interpreted broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (9)

1. The utility model provides a structure is widened to half pin-connected panel road bed which characterized in that includes:

a reinforced concrete retaining wall (1);

the cast-in-situ bored pile (2) is fixedly connected to the lower surface of the wall floor of the reinforced concrete retaining wall (1);

the reinforced concrete retaining wall (1) is prefabricated in an inverted T shape, one reinforced concrete retaining wall (1) corresponds to the three cast-in-situ bored piles (2), and the three cast-in-situ bored piles (2) are respectively positioned on two sides of a vertical wall of the inverted T-shaped reinforced concrete retaining wall (1); the wall floor is located the part of vertical wall both sides is the wall floor outside and wall floor inboard respectively, wherein, the lower surface in the wall floor outside is provided with two bored concrete piles (2), the inboard lower surface in wall floor is provided with one bored concrete pile (2).

2. The semi-assembled roadbed widening structure according to claim 1, wherein three cast-in-situ bored piles (2) are respectively fixed to the lower surface of the wall floor in a triangular staggered manner.

3. The semi-assembled roadbed widening structure according to claim 1, characterized in that the cast-in-situ bored pile (2) is provided with embedded steel bars and the embedded steel bars extend out from the top end face of the cast-in-situ bored pile (2);

the wall floor of the inverted T-shaped reinforced concrete retaining wall (1) is provided with wall floor preformed holes (3) which correspond to the cast-in-place bored piles (2) one by one;

the part that embedded steel bar stretches out stretches into in wall floor preformed hole (3), and will through concreting fall T shaped steel reinforced concrete barricade (1) with bored concrete pile (2) fixed connection.

4. The semi-assembled roadbed widening structure according to claim 1, wherein one inverted-T-shaped reinforced concrete retaining wall (1) corresponds to three cast-in-place piles (2), only two cast-in-place piles (2) and one inverted-T-shaped reinforced concrete retaining wall (1); still include steel-pipe sleeve (4), steel-pipe sleeve (4) set up respectively in two bored concrete pile (2) and a tip of falling T shaped steel reinforced concrete barricade (1) fixed connection for protect outside bored concrete pile (2) concrete placement, prevent the hole that collapses.

5. The widening structure for the semi-assembled roadbed according to claim 1, wherein the diameter of the cast-in-situ bored pile (2) is greater than or equal to 0.3m and less than or equal to 0.5m, and the length of the cast-in-situ bored pile (2) is greater than or equal to 2m and less than or equal to 5m.

6. A semi-fabricated roadbed widening structure according to claim 5, characterized in that the cast-in-situ bored pile (2) is a miniature cast-in-situ bored pile.

7. The structure is widened according to claim 1, and is characterized in that a water drainage hole (5) is formed in the bottom surface of the vertical wall of the reinforced concrete retaining wall (1).

8. The structure is widened according to claim 1, wherein the top end of the vertical wall of the reinforced concrete retaining wall (1) is provided with a guard rail fixing structure for fixing the guard rail (8).

9. The semi-assembled roadbed widening structure according to claim 1, wherein the reinforced concrete retaining wall (1) is provided with a plurality of sections, and the side walls of two adjacent sections of the inverted T-shaped reinforced concrete retaining wall (1) are connected by adopting a tenon structure.

Images