High-performance concrete fabricated channel structure

Abstract

The utility model relates to the technical field of expressway channels, in particular to a high-performance concrete assembly type channel structure. Comprising a channel foundation replacement layer arranged on the ground, a side wall installation cushion layer is laid on the channel foundation replacement layer, prefabricated side walls are installed through the side wall installation cushion layer, a prefabricated top plate is placed between the tops of the prefabricated side walls, and a cast-in-place bottom plate is poured at the bottoms of the prefabricated side walls; and the prefabricated top plate and the prefabricated bottom plate are prepared by adopting a groove-shaped section and a pre-tensioning pre-stress process. The prefabricated side walls, the cast-in-place bottom plates and the prefabricated top plates are assembled to form channel culvert sections. By adopting factory prefabrication and on-site assembly of the prefabricated side wall and the prefabricated top plate, the construction quality can be effectively ensured, and the construction period is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to expressway passageway technical field, concretely is a kind of high-performance concrete assembly type passageway structure. BACKGROUND

[0002] In expressway bridge culvert structure, passageway has the characteristics of large quantity, wide distribution, it is a kind of small structure with drainage, traffic and other functions.The construction progress and construction quality are related to the construction period and quality of whole highway.

[0003] At present, the passageway of new highway, reconstruction and lengthening usually uses cast-in-place form construction, work point is dispersed, construction condition is not unified, leading to that structure construction technology is not easy to control, it is difficult to guarantee structure quality in cast-in-place, maintenance process;In addition, field construction is influenced by weather, topography, concrete age, material transportation etc., and construction progress is slow.Therefore, using standardization design, factory prefabrication, on-site assembly technology can guarantee structure itself quality, improve construction progress and reduce environmental pollution.

[0004] Based on the above status, some prefabricated box type passageways also appear in China.This kind of passageway is based on present box culvert design, roof, side wall size is completely different, standardization degree is low, in fact, it is simply to move field cast-in-place technology into factory.In addition, its cross-sectional size is large, structure self weight is high, which is not conducive to on-site assembly;Material consumption is large, leading to that cost is higher than cast-in-place box type passageway.

[0005] The roof and side wall of traditional box type passageway are all rectangular cross section, and the ultimate bearing capacity of concrete flexural member is determined by beam height, so the cross-sectional size of each meter is basically fixed under given fill height, and material consumption is difficult to greatly reduce under rectangular cross section condition.But when structure is stressed, in addition to the top and bottom of the cross section, the rest of the cross section participates in the stress little, and the material utilization efficiency is low.Excess material increases the structure self weight and improves the structure cost. UTILITY MODEL CONTENTS

[0006] In view of the above deficiencies in the prior art, the utility model provides a high-performance concrete assembly type passageway structure, which has reasonable structure design, simple construction and low cost, and can effectively guarantee construction quality and shorten construction period by using factory prefabrication and on-site assembly.

[0007] The technical scheme of the utility model is as follows:

[0008] A high-performance concrete assembly type passageway structure, which comprises a passageway foundation replacement layer arranged on the ground, a side wall installation cushion layer arranged on the passageway foundation replacement layer, a prefabricated side wall installed through the side wall installation cushion layer, a prefabricated roof arranged on the top of the prefabricated side wall, and a cast-in-place bottom plate poured at the bottom of the prefabricated side wall;The passageway culvert section is formed by assembling the prefabricated side wall, the cast-in-place bottom plate and the prefabricated roof.

[0009] The prefabricated side wall comprises an angle toe, a side wall and a corbel which are successively casted and formed, and the side wall is provided with a side wall stiffening rib;

[0010] The prefabricated top plate comprises a top plate wall which is integrally formed, and the top plate wall is provided with a top plate stiffening rib;

[0011] Waterproof rubber strips are arranged between adjacent prefabricated side walls and between adjacent prefabricated top plates, the waterproof rubber strips are butterfly-shaped rubber waterstop strips, and the outer sides of the waterproof rubber strips are wrapped with asphalt oil felt.

[0012] Further, the angle toe and the upper part of the side wall of the prefabricated side wall are provided with a side wall shear key for pouring a side wall post-pouring belt.

[0013] Further, the top plate wall of the prefabricated top plate is provided with a top plate shear key at both ends for pouring a top plate post-pouring belt.

[0014] Further, connecting shear keys which are wound with each other are arranged between the side wall post-pouring belt and the top plate post-pouring belt for pouring a connecting post-pouring belt.

[0015] Further, the prefabricated side wall, the prefabricated top plate and the side wall post-pouring belt adopt high-performance concrete.

[0016] The prefabricated side wall, the prefabricated top plate and the side wall post-pouring belt adopt high-performance concrete.

[0017] 1. Factory prefabrication, construction quality is easy to guarantee. The main stressed components, the top plate and the side wall of the utility model are factory prefabricated, and the overall quality of the structure is easy to guarantee. The durability problem caused by the difficulty in guaranteeing the construction quality of the traditional concrete channel structure is fundamentally avoided. The new structure is built in a factory in an intensive manner, construction stage diseases caused by the failure of in-situ concrete pouring and curing are avoided, and the quality is higher and more reliable.

[0018] 2. The structure design is reasonable, and the material utilization efficiency is high. It is known through analysis that, in addition to the top and bottom tension areas and the compression areas of the rectangular section of the traditional channel structure, the rest of the section hardly participates in stress. The new channel structure adopts new materials with high strength and high durability, removes all the parts with small stress in the rectangular section of the top plate and the side wall of the traditional channel, greatly reduces the section area, the main material consumption is 1 / 10 of that of the traditional channel, the section stress is increased, and the material utilization efficiency is significantly improved. The durability problem caused by the low material performance of the traditional concrete channel structure is fundamentally avoided.

[0019] 3. The self weight of the new structure is reduced by 30% to 50% compared with the traditional concrete cover plate culvert and box culvert, transportation and installation are more convenient and efficient. Meanwhile, the structure is integral, the requirement for the foundation bearing capacity is low, and the use range is wide.

[0020] 4. The new structure utilizes a high-performance prestressed concrete system, resulting in slab thickness that is 30% to 50% thinner than traditional concrete box culverts and slab culverts, significantly reducing the use of concrete and steel. Furthermore, intensive production and construction, coupled with on-site assembly, reduces the investment in on-site support, formwork, and concrete curing facilities, improving construction efficiency, minimizing the impact on the surrounding environment and existing traffic, and lowering carbon emissions throughout the entire process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the installation of a high-performance concrete assembled channel structure of this utility model Figure 1 ;

[0022] Figure 2 Installation diagram of a high-performance concrete prefabricated channel structure Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the prefabricated side wall structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the prefabricated top plate structure of the utility model;

[0025] Figure 5 This is a schematic diagram of the installation of the waterproof rubber strip of the utility model.

[0026] As shown in the figure: channel foundation replacement layer 1, side wall installation pad 2, prefabricated side wall 3, corner toe 301, side wall wall 302, side wall stiffening rib 303, corbel 304, side wall shear key 305, cast-in-place bottom plate 4, prefabricated top plate 5, top plate wall 501, top plate stiffening rib 502, top plate shear key 503, side wall post-cast strip 6, top plate post-cast strip 7, connecting shear key 8, connecting post-cast strip 9, waterproof rubber strip 10. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific embodiments:

[0028] Example 1

[0029] like Figures 1-5 As shown, the present invention provides a high-performance concrete assembled channel structure. By adopting the installation of prefabricated side walls 3, cast-in-place bottom plates 4 and prefabricated top plates 5, the purpose of factory pre-support and on-site assembly is achieved.

[0030] First, the channel foundation replacement layer 1 is constructed. A foundation pit is excavated and the ground is treated according to the design requirements to ensure that the foundation's bearing capacity meets the structural requirements. Next, the channel foundation replacement layer is laid on top of the treated ground. This replacement layer, typically composed of crushed stone, sand, or other suitable materials, improves the foundation's uniformity and bearing capacity.

[0031] The sidewall installation pad 2 is laid on the channel foundation replacement layer 1. This pad provides stable support and precise positioning for the prefabricated sidewalls 3. The installation pad 2 is usually made of a granular material compatible with the channel foundation replacement layer 1 to ensure the stability of the sidewalls.

[0032] The precast side walls 3 are prefabricated in the factory according to design requirements. They utilize a channel-shaped cross-section and prestressing technology. Their structure includes a corner toe 301, side wall 302, and corbels 304. Side wall shear keys 305 are installed on the corner toes 301 and the upper portions of the side walls 302. These shear keys are used to connect to the post-cast strip 6 during subsequent construction. Side wall stiffeners 303 are installed on the side walls 302 to enhance their structural strength.

[0033] The prefabricated side walls 3 are precisely placed on the side wall installation pad 2 using hoisting equipment and initially fixed. Horizontal and vertical adjustments are made between the prefabricated side walls 3 and between the prefabricated side walls 3 and the channel foundation replacement layer 1 to ensure the side wall positions are accurate.

[0034] After the precast sidewalls 3 are installed and adjusted, the cast-in-place baseplate 4 is constructed. This baseplate 4 is constructed using conventional concrete. The thickness and strength of the baseplate 4 are determined based on design requirements and load conditions. Before pouring the baseplate concrete, the bottom of the sidewalls must be cleaned to ensure there is no debris between the cast-in-place baseplate 4 and the precast sidewalls 3 to ensure proper adhesion.

[0035] When pouring the base slab concrete, attention must be paid to the uniformity and density of the concrete to avoid voids and cracks. After pouring, it is cured to ensure that the concrete reaches the designed strength.

[0036] After the cast-in-place bottom plate 4 reaches the design strength, the installation of the prefabricated top plate 5 begins. The prefabricated top plate 5 is prefabricated in the factory according to the design requirements and is prepared using a trough section and prestressing process. The prefabricated top plate 5 includes an integrally formed top plate wall 501, on which top plate stiffening ribs 502 and top plate shear keys 503 at both ends are provided. The installation of the top plate is similar to that of the side wall. The prefabricated top plate is placed on the top of the side wall by lifting equipment, and the hook-shaped steel bars protruding from the top of the prefabricated side wall 3 are tied together with the steel bars of the prefabricated top plate 5 for preliminary fixation.

[0037] After the installation of the prefabricated side walls and roof panels is completed, the construction of the side wall post-pouring belt 6, the roof post-pouring belt 7 and the connecting post-pouring belt 9 is carried out. The connecting shear key 8 is arranged between the side wall post-pouring belt 6 and the roof post-pouring belt 7 to pour the connecting post-pouring belt 9. The side wall post-pouring belt 6, the roof post-pouring belt 7 and the connecting post-pouring belt 9 adopt the principle of integrated pouring. The post-pouring belt is the key structure connecting the prefabricated components and the cast-in-place part, and the stability and the anti-seismic performance of the whole structure are ensured by arranging the shear key and the connecting key. The connecting post-pouring belt 9 ensures the rigidity of the corner part.

[0038] The concrete of the post-pouring belt also adopts the UHPC material to ensure the consistency and the performance of the whole structure. When pouring, the fluidity and the compactness of the concrete need to be paid attention to to ensure the good adhesion between the post-pouring belt and the prefabricated components.

[0039] In order to improve the waterproof performance of the channel structure, the waterproof rubber strips 10 are arranged between the adjacent prefabricated side walls 3 and between the adjacent prefabricated roof panels 5. The waterproof rubber strip adopts the butterfly-shaped rubber waterstop, and the outer side of the waterproof rubber strip is wrapped with asphalt oil felt. The waterproof rubber strip can effectively fill the gap between the components to prevent water penetration.

[0040] After all the components are installed and the post-pouring belt concrete is cured, the overall inspection of the structure is carried out. The inspection contents include the verticality and the horizontality of the structure, the connection quality between the components, the waterproof performance and the like. It is ensured that all the indexes meet the design requirements and the relevant standards.

[0041] After the structure inspection is qualified, the channel with the span of 4m, 6m, 8m, 10m and 12m is decorated inside, including the whitewashing of the wall surface and the roof surface, the installation of the lighting facilities, the decoration inside the channel and the like. The decoration work should consider the use function and the aesthetics of the channel.

[0042] Through the above embodiment, the high-performance concrete assembly channel structure has the advantages of short construction period, controllable quality and strong durability. The structure is suitable for the construction of the urban underground channel, the culvert and other similar projects, and can effectively improve the construction efficiency and the service life of the project.

[0043] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application should be defined by the appended claims rather than the above description, and all changes coming within the meaning and equivalency range of the elements of the claims are intended to be embraced therein.

[0044] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A high-performance concrete prefabricated channel structure, comprising a channel foundation replacement layer arranged on the ground, characterized in that: A side wall installation cushion is laid on the channel foundation replacement layer, and prefabricated side walls are installed through the side wall installation cushion. A prefabricated top plate is placed between the tops of the prefabricated side walls, and a cast-in-place bottom plate is poured at the bottom of the prefabricated side walls; the channel culvert section is formed by assembling the prefabricated side walls, the cast-in-place bottom plate and the prefabricated top plate; The prefabricated side wall comprises a corner toe, a side wall and a corbel that are cast in sequence, and side wall stiffening ribs are provided on the side wall; Wherein, the prefabricated top plate comprises an integrally formed top plate wall, on which top plate stiffening ribs are provided; Waterproof rubber strips are arranged between adjacent prefabricated side walls and adjacent prefabricated top plates of the channel. The waterproof rubber strips are butterfly-shaped rubber waterstops, and the outer sides of the waterproof rubber strips are wrapped with asphalt oil felt.

2. The high performance concrete prefabricated channel structure according to claim 1, characterized in that: Side wall shear keys are provided at the corner toes and the upper part of the side wall of the prefabricated side wall for pouring the side wall post-cast strips.

3. The high performance concrete assembled channel structure according to claim 2, characterized in that: Top plate shear keys are provided at both ends of the top plate wall of the prefabricated top plate for pouring the top plate post-cast strip.

4. The high performance concrete assembled channel structure according to claim 3, characterized in that: Connecting shear keys that are intertwined with each other are provided between the side wall post-cast strip and the top plate post-cast strip, and are used for pouring the connecting post-cast strip.

5. A high performance concrete assembled channel structure according to any one of claims 1 to 4, characterized in that: The prefabricated side walls, prefabricated top plates and side wall post-cast strips are made of high-performance concrete.

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