CN209636573U - A kind of assembled self-balancing channel design system - Google Patents

Abstract

The utility model discloses an assembled self-balancing channel structure system. The structure system includes a channel structure body and a load-bearing structure. The load-bearing structure includes a pile foundation and a cap beam. The cap beam is arranged on the top of the pile foundation. A horizontal support corbel is provided, and the horizontal support corbel is covered on the cap beam so that the channel structure body is suspended between the pile foundations. As for the traffic surface, the upper surface of the chamber bottom plate forms the second longitudinal traffic surface, and the two sides of the channel structure body are densely filled with fillers to form the subgrade behind the platform. The dead load and live load of the channel structure body are all borne by the pile foundation, and the force is clear, clear and reliable. This structural system avoids the complicated process of foundation treatment in the bridge span area, the prefabricated assembly construction period is short, the work efficiency is high, and the generation of on-site construction waste and environmental pollution are reduced, which is in line with the concept of green construction.

Description

An assembled self-balancing channel structure system

technical field

The utility model relates to the technical field of highway and municipal bridge and culvert engineering, in particular to an assembled self-balancing channel structure system.

Background technique

In recent years, my country has paid more and more attention to environmental protection. In the field of bridge and culvert construction, while vigorously advocating environmental protection, noise reduction, and green bridge construction, in order to further speed up the construction of bridges and culverts and minimize the interference to the current traffic, we are actively promoting the prefabricated and assembled construction of bridges and culverts to greatly improve construction. Technology, efficiency, improve economic and social comprehensive benefits. Prefabricated assembled bridges and culverts have become one of the development trends of bridge and culvert construction in the future.

At present, the existing prefabricated assembled overpass bridges or culverts are prefabricated installed slab girders, or prefabricated installed cover plate culvert roofs, or prefabricated assembled box culvert segments, etc. Although they have achieved certain development, they are still the same as traditional cast-in-place bridges , a large amount of earthwork excavation and backfilling are required, and the deep soft foundation in the basement range of the bridge and culvert area still needs to be treated. Therefore, regardless of the traditional cast-in-place design or the existing prefabricated bridge and culvert design, the corresponding bridge and culvert construction site is characterized by a large workload, a long period, and low efficiency.

In view of the above shortcomings of existing cast-in-place and prefabricated bridges and culverts, and to minimize the adverse effects of settlement, cracks and reinforcement caused by potential unbalanced bending moment internal forces on the left and right sides, and to better adapt to the development needs of green bridge construction, it is urgently needed Develop more excellent and efficient prefabricated assembly structure systems and construction methods.

Utility model content

The technical problem to be solved by the utility model is to provide an assembled self-balancing channel structure system to solve the problems mentioned in the background technology.

The technical solution adopted to solve the above technical problems: an assembled self-balancing channel structure system, including a channel structure body and a load-bearing structure, and the load-bearing structure includes several piles distributed on both sides of the channel structure body along the length direction of the channel structure body foundation and cap beam, the cap beam is set on the top of the pile foundation, the upper two sides of the channel structure body are provided with horizontal support corbels, and the horizontal support corbels are covered on the cap beam so that the channel structure body is suspended Between the pile foundations on both sides, the cross-section of the channel structure body is rectangular, and its interior runs through continuously along the length direction to form a chamber; The passage surface, the upper surface of the bottom plate of the chamber forms the second passage surface that provides the longitudinal passage function, and the pile foundations distributed on both sides of the channel structure body form a combination with the cap beam, the side plate of the channel structure body and the backfilling behind the platform abutment.

Further, the channel structure body includes several prefabricated channel structure units, and several channel structure units are assembled side by side longitudinally to form the channel structure body.

Further, the top plate, a pair of side plates and the bottom plate of the channel structure unit enclose a rectangular chamber, chamfering or haunching structures are provided between the side plate and the top plate and between the side plate and the bottom plate, and the two ends of the top plate It protrudes from the side plate to form a supporting corbel unit, and several supporting corbel units are vertically arranged side by side to form a horizontal supporting corbel.

Further, the bottom slab is formed by continuous pouring of concrete, or the bottom slab is a weight-reducing bottom slab, and the weight-reducing bottom slab is set as a hollow grid support beam, and mortar rubble is laid between the hollow grid support beams.

Further, the bottom plate is a combined bottom plate, and the combined bottom plate includes a prefabricated bottom plate, and the prefabricated bottom plate is provided with reserved steel bars for pouring the upper layer of concrete, and the upper layer of concrete is poured after the passage structural unit is assembled.

Further, below the bottom plate is a shallow foundation replacement layer.

Further, between the two sides of the channel structure body and the road embankment or the embankment, the backfill behind the platform is densely filled to form the subgrade behind the platform, and the side plate is provided with grouting holes, or the subgrade behind the platform is provided with vertical A grouting pipe, the injection end of the vertical grouting pipe is directed to the side plate.

Further, the channel structure unit is a common reinforced concrete member, a prestressed reinforced concrete member or an FRP member, or a UHPC member; the pile foundation is a prefabricated pile foundation or a drilled underwater concrete pile foundation.

Beneficial effect:

The main body of the channel structure is suspended and supported on the cap beam by the horizontal support corbel, and its dead load and live load are borne by the pile foundation, which avoids complicated foundation treatment processes in the bridge span area and greatly speeds up the construction speed.

Compared with traditional bridges, the structure body of this channel has the function of three-dimensional crossing, which realizes a bridge with dual purposes, and simplifies the process of abutment construction; compared with traditional box culverts, it cancels the deep soft soil in the inner area of the span and the stress is clearer and more reliable, and the post-construction settlement control is more effective.

The side plate, pile foundation and cap beam of the channel structure body together form a combined abutment, which acts as a soil retaining force. Among them, the pile foundation is not only the load-bearing foundation of the channel structure body, but also the construction support pile of the abutment, which effectively reduces the construction process of the abutment and reduces the amount of excavation and backfilling of the existing earthwork behind the abutment. The main body of the channel structure and the combined abutment are adapted to and meet the stress requirements of the subgrade filling behind the abutment.

At the same time, the construction period of the prefabricated self-balancing channel structure system is short, and the prefabricated assembly construction reduces the generation of on-site construction waste and reduces environmental pollution.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further:

Fig. 1 is a schematic cross-sectional structure diagram of an assembled self-balancing channel structure system;

Fig. 2 is the structural representation that is provided with grouting hole on side plate;

Fig. 3 is the structure diagram that is provided with vertical grouting pipe in the embankment behind the platform;

Fig. 4 is the top view of the hollowed-out lattice support beam;

Fig. 5 is a schematic cross-sectional view of a hollowed-out grid support beam;

Fig. 6 is a schematic cross-sectional view of the combined bottom plate.

Detailed ways

Referring to Figures 1 to 6, the utility model is an assembled self-balancing channel structure system, including a channel structure body and a load-bearing structure. The load-bearing structure includes a number of pile foundations 22 and cap beams 21 distributed on both sides of the passage structure body along the length direction of the passage structure body. The cap beam 21 is fixed and poured on the top of the pile foundation 22. Lower the concrete pile foundation. The channel structure body is arranged between the embankments or roadbeds on both sides, and the length direction of the roof 11 is defined as the direction of pedestrians in Figure 1, and the length direction perpendicular to the roof 11 is the direction connecting the embankments or roadbeds on both sides. The channel structure body is provided with horizontal support corbels 111 on both sides of its upper part, and the horizontal support corbels 111 are covered on the cap beam 21, so that the channel structure body is suspended between the pile foundations 22 on both sides, so that the channel structure body is constant. Loads and live loads are borne by the load-bearing structure. The cross-section of the channel structure body is rectangular, and its interior runs continuously along the length direction to form a space chamber. The upper surface of the top plate 11 of the channel structure body forms a first passage surface to meet the requirements of lateral passage, and the first passage surface can allow vehicles or pedestrians to pass from one side of the embankment or roadbed to the other side of the embankment or roadbed. The upper surface of the bottom plate 13 of the channel structure body chamber forms a second passage surface, which can be used by people on the lower floor or water to pass longitudinally, and its passage direction is perpendicular to the passage direction of the first passage surface. The pile foundation 22 distributed on both sides of the channel structure body, the cap beam 21, the side plate 12 of the body structure, and the backfill 33 behind the abutment jointly form a combined abutment.

Preferably, the channel structure body includes several prefabricated channel structure units, and the channel structure units are assembled side by side longitudinally to form a rectangular hollow channel structure body. Specifically, the channel structure unit is provided with a notch or a connecting key structure on the side of the assembly, and the connecting key structure here is similar to the cooperation between the convex body and the recess or other matching structures on the sides of two adjacent channel structure units. , the matching structures are nested with each other to realize precise positioning and connection between adjacent channel structural units, and the top plates 11 of two adjacent channel structural units are fastened and sealed through hinge joints.

Among them, the channel structure unit is a prefabricated part, which can be made of ordinary reinforced concrete members or prestressed reinforced concrete members, UHPC ultra-high performance concrete materials, or new materials and processes such as FRP. The channel structure unit includes a top plate 11, a pair of side plates 12 and a bottom plate 13. The top plate 11, the two side plates 12 and the bottom plate 13 together form a passage space above the second passage surface to ensure smooth passage of pedestrians or water. The top plate 11 protrudes from the side plate 12 along the length direction to form a supporting corbel unit, and several supporting corbel units are arranged side by side longitudinally to form a horizontal supporting corbel 111 . In order to enhance the connection strength, chamfering or haunching structures are provided between the side plate 12 and the top plate 11 and between the side plate 12 and the bottom plate 13 .

The base plate 13 is a continuous concrete member, which is formed by continuous pouring of concrete. The base plate 13 can also be designed as a weight-reducing base plate with a hollow grid support beam structure, and the mortar rubble 132 is laid between the hollow grid support beams to form a flat The continuous surface, the two ends of the hollow grid support beams are connected to the side plate 12, which ensures the self-strength and connection strength of the bottom plate 13 while achieving weight reduction, for pedestrians and running water to pass through. Adopting this structure can greatly reduce the weight of the passage structure body, effectively solving the problem of the heavy hoisting weight of the passage structure body.

The side plate 12 is a ribbed plate, and several ribs 121 are equally spaced on the outside to achieve the effect of strengthening the strength of the side plate 12 . At the same time, the hollow grid support beam includes a number of support beams 131 distributed at equal intervals in the longitudinal direction, and each support beam 131 corresponds to the rib plate 121 in the same vertical plane, forming a frame stress system, effectively Ensure the strength of the structure.

Alternatively, the base plate 13 can also be a combined base plate formed step by step, including a prefabricated base plate 133 and an upper post-cast concrete 134 two-layer structure. The main body of the channel structure is a prefabricated part, and the prefabricated bottom plate 13 only includes the prefabricated bottom plate 133 and the reserved steel bars extending into the post-cast concrete 134 on the upper floor. After the hoisting and splicing of the channel structure body is completed, the pouring of the upper concrete 134 is completed on the prefabricated bottom plate 133 and the reserved steel bars, so that the entire bottom plate 13 is formed, thereby reducing the hoisting weight of the channel structure body, which is conducive to the smooth completion of hoisting and also The requirements for the strength of the channel structure body itself are guaranteed.

The base plate 13 is supported between the side plates 12 on both sides. When the side plates 12 are subjected to the horizontal pressure of the filling soil or groundwater around the pile foundation 22, the base plate 13 can provide supporting force to ensure the stability of the side plates 12. Below the base plate 13 is the shallow foundation replacement layer 32. Since the base plate 13 and the side plate 12 are firmly connected, and most of the weight of the channel structure body is shared by the pile foundation 22, the area under the base plate 13 in the bridge span area The soil foundation only needs to be replaced by a simple shallow layer, and there is no need to carry out deep soft soil foundation treatment, and it is not necessary to wait for the foundation in the inner area to settle slowly to stabilize. The on-site pouring time of the beam body and the concrete abutment is shortened, and the economic benefit is obvious.

Backfill 33 is layered and densely filled between both sides of the channel structure body and the road embankment or embankment to form the backfill roadbed behind the platform. When the space behind the platform is insufficient, the side plate 12 is provided with grouting holes 41, or backfilling behind the platform 33 is provided with a vertical grouting pipe 42 , and the injection end of the vertical grouting pipe 42 points to the side plate 12 . The grouting holes 41 on the side plate 12 are staggered in a quincunx shape, the vertical spacing of the grouting holes 41 is about 1.5m, and the horizontal spacing is about 2m. When the construction space behind the platform is sufficient, only the backfill 33 behind the platform can be used to complete the layered filling and compaction of the subgrade behind the platform; when the construction space behind the platform is insufficient, use small machines to fill and compact the subgrade in layers After the backfill 33, the backfill body of the roadbed behind the platform is grouted and compacted through the grouting hole 41 reserved on the side plate 12. Alternatively, a vertical grouting pipe 42 is pre-set in the backfill 33 behind the platform, and the injection end of the vertical grouting pipe 42 is directed to the side plate 12, and grouting through the vertical grouting pipe 42 can also complete the subgrade behind the platform. The grouting of the backfill body is dense.

The channel structure body is suspended and supported on the cap beam 21 through the horizontal support corbel 111, and its dead load and live load are borne by the pile foundation, which avoids the complicated foundation treatment process in the bridge span area, shortens the construction period, and greatly speeds up the construction process. construction speed. Compared with traditional bridges, the structure body of this channel has the function of three-dimensional crossing, realizes dual-purpose bridge, and simplifies the abutment process; compared with traditional box culverts, it cancels the deep soft soil treatment in the span inner area, and The force is more clear and reliable, and the post-construction settlement control is more effective.

The side plate 12, the pile foundation 22 and the cap beam 21 of the channel structure body constitute a combined abutment, which jointly play the role of retaining soil force. Among them, the pile foundation 22 is not only the load-bearing foundation of the channel structure body, but also the construction support pile of the abutment, which effectively reduces the construction process of the abutment and reduces the amount of excavation and backfilling of the existing earthwork behind the abutment. The main body of the channel structure and the combined abutment are adapted to and meet the stress requirements of the subgrade filling behind the abutment.

A rapid construction method for an assembled self-balancing channel structure system, comprising the following steps:

S1, leveling the site of the bridge site, constructing pile foundation 22;

S2, chiseling the pile head to the design elevation, pouring the construction cap beam 21 on site;

S3. Excavate the earthwork within the scope of the channel structure body, the cap beam 21, the pile foundation 22 and the backfill 33 behind the platform, and trim the backfill slope;

S4. Properly excavate the soil below the bottom plate 13, and replace the shallow foundation;

S5. Carry out the hoisting construction of the channel structure unit, and perform joint treatment after hoisting and position adjustment, as well as roof hinge joints and roof cast-in-place leveling layer 52 construction;

S6, Backfill 33 behind the backfill table;

S7. Construction of auxiliary structures including the slab 7, the cast-in-place leveling layer 52 behind the platform and the bridge deck pavement 6, and the construction of the channel structure system is completed.

In step S6, when the construction space behind the platform is sufficient, the backfill material 33 behind the platform and the compaction process are used for filling; when the construction space behind the platform is insufficient, after the channel structural unit is placed, the small mechanical After filling the backfill 33 after the compaction platform in layers as much as possible, then pass the grouting hole 41 reserved on the side plate 12 or the vertical grouting pipe 42 pre-set in the backfill 33 behind the platform to backfill the subgrade behind the platform. Perform grouting.

The channel structure body and the embankment and the embankment are filled with backfill material 33 to form the subgrade behind the abutment. The horizontal supporting corbel 111 and the subgrade behind the abutment are jointly provided with a board 7, and the board 7, the top plate 11 and the subgrade behind the abutment are respectively arranged There are cast-in-situ leveling layer concrete 52 and bridge deck pavement layer 6, and the top surface of bridge deck pavement layer 6 forms the first traffic surface.

The construction period of the assembled self-balancing channel structure system is short, and the prefabricated and assembled construction reduces on-site construction waste and environmental pollution.

The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned embodiments. Various changes made belong to the protection scope of the present utility model.

Claims (8)

1. a kind of assembled self-balancing channel design system, it is characterised in that: including channel design ontology and load-carrying members, institute Stating load-carrying members includes that several pile foundations and cap beam of channel design ontology two sides, institute are distributed in along channel design body length direction It states cap beam to be arranged at the top of pile foundation, the top two sides of the channel design ontology are provided with horizontally-supported bracket, the horizontal branch Support bracket, which is put up, is suspended on the channel design ontology between the pile foundation of two sides, the channel design ontology Cross section be in rectangle, inside be continuous through to form a chamber along its length；The cover top surface of the channel design ontology The the first current face for meeting the current demand of upper layer transverse direction is formed, the plate upper surface of the chamber, which is formed, provides longitudinal direction current function The second current face, be distributed in channel design ontology two sides pile foundation and cap beam, channel design ontology side plate and platform after return Composite abutment is collectively formed in filler.

2. assembled self-balancing channel design system according to claim 1, it is characterised in that: the channel design ontology Including several prefabricated channel design units, the longitudinal composition channel design sheet assembled side by side of several described channel design units Body.

3. assembled self-balancing channel design system according to claim 2, it is characterised in that: the channel design unit Top plate, a pair of side plates and bottom plate surround rectangular chamber, chamfering is set between the side plate and top plate and side plate and bottom plate Or haunch structure, the both ends of the top plate protrude from side plate and form support bracket unit, several support bracket units are longitudinal Horizontally-supported bracket is formed side by side.

4. assembled self-balancing channel design system according to claim 3, it is characterised in that: the bottom plate is through concrete Continuous placing is formed or the bottom plate is loss of weight bottom plate, which is set as hollow out grid type supporting beam, hollow out grid type Mortar flag stone is covered between supporting beam together.

5. assembled self-balancing channel design system according to claim 3, it is characterised in that: the bottom plate is combined type Bottom plate, the combined type bottom plate includes prefabricated panel, and the reserved steel for pouring layer concrete is provided on the prefabricated panel Muscle, channel design unit pour layer concrete after completing assembly again.

6. the assembled self-balancing channel design system according to any one of claim 3~5, it is characterised in that: described It is ground shallow displacement layer below bottom plate.

7. the assembled self-balancing channel design system according to any one of claim 3~5, it is characterised in that: channel Sold stowing back filling behind abutment material forms roadbed after platform, the side plate between road embankment or embankment respectively for the two sides of structural body On be provided with after injected hole or the platform and be provided with vertical Grouting Pipe in roadbed, the dispensing end of the vertical Grouting Pipe is directed toward Side plate.

8. the assembled self-balancing channel design system according to any one of claim 2~5, it is characterised in that: described Channel design unit is ordinary reinforced concrete component, prestressed reinforced concrete component or FRP component, UHPC component；It is described Pile foundation is prefabricated pile foundation or drill-pouring underwater concrete pile foundation.