Thrust type bridge and tunnel combined construction structure

Abstract

The utility model discloses a thrust type bridge and tunnel combined construction structure which comprises a frame type tunnel structure and a bridge arranged above the tunnel structure. The bridge comprises two sets of supporting structures arranged at the top of the tunnel structure at intervals in the length direction of the tunnel structure and an arch-shaped main beam arranged on the two supporting structures in a crossing mode. Each supporting structure comprises at least one force transmission buttress poured at the top of the tunnel structure and a V-shaped pier arranged on the force transmission buttress and used for supporting the main beam. The two ends of the bridge are both provided with abutment filling soil located on the outer side of the supporting structure, and a soil base surface hardening layer is arranged between the abutment filling soil and the supporting structure. The large-area tunnel structure is used for bearing the horizontal thrust transmitted by the bridge, so that the bridge does not need to be independently provided with a special balance tie bar to balance the horizontal thrust, the construction of the bridge is simpler, the convenience of construction is improved, the construction difficulty is reduced, the construction period is shortened, and the cost of construction measures is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of highway, municipal bridge engineering, especially relates to a construction structure of bridge and tunnel combined construction with thrust. BACKGROUND

[0002] With the development of the city, the land use of the city is more and more nervous, in order to make full use of the limited land resources, the city traffic often uses the ground and the underground at the same time, and the space development is developed. With the improvement of people's living standard, higher requirements are put forward for the living environment, in order to improve the city environment quality, the city planning construction or landscape reconstruction often fully utilizes the natural river in the city to carry out the hydrophilic environment design. Therefore, under the multiple demands of ensuring the city landscape and improving the city traffic efficiency, more and more bridges and tunnels are combined in the city traffic construction, and such composite infrastructure has the characteristics of long design life (usually needs to meet the hundred-year benchmark), complex construction technology (involving high-precision construction equipment and technology), strict safety protection standard (such as setting isolation pile and other special measures), which leads to the significant increase of construction cost; and the traditional split type construction scheme can objectively increase the engineering economic burden through independent construction and multiple protection measures to ensure safety.

[0003] In the past, the bridge and tunnel combined design often adopts the scheme of independent construction, and various safety protection measures such as isolation pile are used during construction, which undoubtedly further increases the engineering cost. The common construction scheme of bridge overpass tunnel or tunnel underpass bridge is to adopt the separated construction, the bridge structure and the tunnel structure are separated, and the special conversion structure is set, for example, the scheme of large diameter pile + conversion beam, as shown in the drawing, this construction scheme not only increases the construction difficulty, but also significantly increases the engineering cost of the structure, and the construction organization is difficult, and the construction period is long. Figure 1

[0004] The arch bridge structure has good landscape effect due to its smooth curve line type, therefore, the arch bridge is often used in the city bridge design. But due to the inherent structural characteristics of the arch bridge, horizontal thrust (i.e. thrust along the length direction of the bridge) will be generated under the action of vertical load, so the arch bridge needs to set special tie rod structure to balance the thrust, in the city arch bridge construction, the tie rod is often set to balance the horizontal thrust of the arch bridge, so that it can adapt to various geological conditions, and even can be applied in silt geology; but the increased tie rod structure will increase the construction difficulty and period, and also increase the cost, and the existing arch bridge construction needs more temporary support and formwork and other construction measures structure. UTILITY MODEL CONTENTS

[0005] ​The utility model discloses to the above technical defects, provide a kind of construction structure of push type bridge and tunnel combined construction, utilize the horizontal thrust of large area tunnel structure to bear bridge transmission, make bridge not need again independently set special balance tie rod to balance horizontal thrust, and further make the construction of bridge more simple, improve the convenience of construction, reduce construction difficulty and construction period, reduce construction measure cost.

[0006] In a first aspect, to solve the above technical problems, the utility model provides a kind of construction structure of push type bridge and tunnel combined construction, including frame type tunnel structure and the bridge of being located above tunnel structure, the bridge includes two groups of support structure being located at the top of tunnel structure along the length direction interval of tunnel structure and the main beam being arranged across two support structures and being arched, the support structure includes at least one force transmission support pier being poured at the top of tunnel structure and V type pier being located on force transmission support pier and being used to support main beam.

[0007] Further, each group of support structure includes two force transmission support piers being located at the top of tunnel structure along the width direction interval of tunnel structure and two V type piers being located on force transmission support pier one by one and being used to support main beam.

[0008] Further, the top of tunnel structure is equipped with water-resisting layer.

[0009] Further, river hardening structure or pavement structure is equipped on water-resisting layer.

[0010] Further, the tunnel structure includes bottom plate being located on foundation, at least two vertical walls being located on bottom plate along the width direction interval of bottom plate and top plate being located on the top end of vertical wall, and at least one tunnel is enclosed by the bottom plate, vertical wall and top plate, so that the cross section of tunnel structure is single-hole or multi-hole box section.

[0011] Further, the bottom of bottom plate is equipped with a layer of cushion layer.

[0012] Further, the both ends of bridge are equipped with backfill soil located on the outside of support structure, and soil base surface hardening layer matching the shape of both ends of bridge is equipped between backfill soil and support structure.

[0013] Further, the soil base surface hardening layer is concrete layer or reinforced concrete layer.

[0014] Further, bridge head apron connecting ground and main beam is equipped on backfill soil.

[0015] Further, the cross section of main beam is single-box chamber or multi-box chamber box section.

[0016] The utility model has the following beneficial effects:

[0017] (1)The arch bridge structure is beautiful in shape, has good landscape effect, and better fits the landscape demand of city construction; the bridge is directly built on the tunnel structure by pouring and fixing, the tunnel structure is well utilized, the tunnel structure is used as a large expanded foundation of the bridge, the bridge foundation part structure is saved, a long pile foundation is not needed, and large pile equipment is avoided, so that the bridge and tunnel combined structure can greatly save engineering cost, has good economy, and after the two groups of support structures at the two ends of the bridge are combined with the tunnel structure, a tension structure is formed, the horizontal thrust transmitted by the bridge is balanced by the top plate of the tunnel structure, the support structure composed of the V-shaped piers and the force transmission piers is used, opposite tension is generated on the two arms of the V-shaped piers, and the horizontal thrust transmitted by the bridge is further balanced, so that the bridge does not need to be provided with a special balance tie rod to balance the horizontal thrust, and the bridge construction is simpler, the construction convenience is improved, the construction difficulty and construction period are reduced, and the construction measure cost is reduced.

[0018] (2)The backfill is arranged at the two ends of the bridge, and the soil surface hardening layer is arranged outside the backfill, so that the tunnel structure and the soil surface hardening layer can be used as a bridge construction support platform, the bridge construction difficulty and the organization process can be effectively reduced, especially the soil surface hardening layer can be directly used as the bottom template and the bearing layer of the bridge side beam structure at the two ends of the bridge, the temporary support for pouring is not needed at the two ends of the bridge, the amount of the construction measure structure such as the temporary support and the template required when the bridge side beam is poured is reduced, the construction process is simpler, the construction period is relatively shorter, and the construction measure cost is saved.

[0019] (3)The bridge and tunnel combined construction structure is suitable for a solution of multiple three-dimensional traffic, a ground road is arranged on the bridge, an underground road is arranged in the tunnel, and the bottom of the bridge can be arranged as a river channel, a pedestrian channel or a road according to the environment and planning conditions; the bridge and tunnel combined construction structure provides a cross key node solution for the space development of traffic in an area with limited land conditions and large traffic volume.

[0020] The additional aspects and advantages of the utility model will be partially given in the following description, which will become obvious from the following description or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the utility model, constitute a part of the present application, and do not constitute improper limitation on the utility model, and in the drawings:

[0022] Figure 1 It is a schematic view of the bridge and tunnel combined construction structure in the prior art;

[0023] Figure 2 This is a schematic elevation view of the construction structure in the embodiment, which combines a thrust bridge and a tunnel.

[0024] Figure 3 This is a schematic cross-sectional view of the construction structure in the embodiment, which combines a thrust bridge and a tunnel. Detailed Implementation

[0025] To better understand the technical content of this utility model, the following will further introduce and explain this utility model in conjunction with the accompanying drawings and specific embodiments. It should be noted that if there are descriptions such as "first" and "second" in the text, they are used to distinguish different components, etc., and do not represent the order of priority, nor do they limit "first" and "second" to be different types.

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] like Figures 2-3 As shown in the figure, this embodiment illustrates a construction structure for a combined thrust bridge and tunnel, comprising a frame-type tunnel structure and a bridge situated above the tunnel structure.

[0029] In one embodiment, the tunnel structure includes a base slab 9 on the foundation, at least two vertical walls 104 spaced apart on the base slab 9 along its width, and a top slab 8 spanning the top of the vertical walls 104. The length of the vertical walls 104 extends along the length of the base slab 9, and at least one tunnel 20 is formed between the base slab 9, the vertical walls 104, and the top slab 8. That is, a tunnel 20 is formed between each two adjacent vertical walls 104, so that the cross-section of the tunnel structure is a single-hole or multi-hole box-shaped cross-section. The base slab 9, the vertical walls 104, and the top slab 8 are cast to form an integral frame structure. The thickness of the vertical walls must meet the requirements of effectively transmitting the load to the base slab and distributing it to the foundation. This integral structure has the advantages of both mechanical strength and overall stability. The tunnel top slab directly bears the load transmitted by the thrust bridge above. The horizontal force transmitted by the thrust bridge is directly borne by the tunnel top slab, while the vertical load transmitted by the thrust bridge is transmitted and distributed to the foundation through the vertical wall force transmission system via the top slab.

[0030] In an embodiment, the road surface structure 105 and the drainage ditch 106 are laid in the tunnel 20, and a railway tunnel can also be formed by laying rails and the like in the tunnel; the road surface structure 105 directly bears the vehicle load in the tunnel and has the function of dispersing and transmitting the vehicle load; the drainage ditch 106 is used to collect water flow in the tunnel and discharge the water flow out of the tunnel through a drainage system.

[0031] In an embodiment, a pedestrian maintenance path 107 is also laid in the tunnel 20 on one side or both sides of the road surface structure 105; when one side of the road surface structure 105 is not provided with a pedestrian maintenance path, a crash barrier 108 is correspondingly provided; the pedestrian maintenance path 107 is a structure for safe passage of tunnel management and maintenance personnel, which is hollow below and can be arranged with various pipelines (such as power communication lines) inside; the crash barrier is an additional structural layer provided on the side wall (i.e. the vertical wall) of the tunnel, which is used to prevent direct impact of the vehicle on the side wall structure of the tunnel when the vehicle is out of control, thereby reducing the risk of damage to the tunnel.

[0032] In an embodiment, the bottom of the bottom plate 9 is provided with a cushion layer 10, which is preferably made of cast concrete.

[0033] In an embodiment, the bridge includes two groups of support structures spaced apart along the length direction of the tunnel structure and arranged on the top of the tunnel structure, and a main beam 1 arranged across the two support structures and in an arched shape, each group of support structures includes two force transmission piers 3 spaced apart along the width direction of the tunnel structure and arranged on the top of the tunnel structure, and two V-shaped bridge piers 2 correspondingly arranged on the force transmission piers 3 and used to support the main beam 1, the force transmission piers 3 are cast on the top of the tunnel structure in a cast manner, and the main beam 1, the V-shaped bridge piers 2 and the force transmission piers 3 form an integral rigid connection structure in a cast manner, so that the main beam and the support structure are connected as a whole to ensure the structural rigidity and stability.

[0034] Preferably, the main beam is designed in a monolithic box section, and the section form can be flexibly arranged in a single box chamber or a multi-box chamber according to the width of the bridge deck; the single box chamber section exhibits good overall rigidity and torsional performance in a medium-width bridge deck, and the multi-box chamber scheme is suitable for wide bridge deck load distribution requirements, and both can improve the structural stability through the closed box section.

[0035] In an embodiment, a waterproof layer 6 is further provided on the top plate 8, which is paved by clay, for isolating water flow and preventing water from penetrating into the tunnel. When the bridge is under a river, the top plate of the waterproof layer needs to be treated by river bottom hardening. When the bridge is under a passage, a pavement structure layer is built on the top plate of the waterproof layer and a drainage system is arranged. In actual application, when the bridge is under a river, a river hardening structure (not shown in the figure) is further provided on the waterproof layer 6, i.e. a layer of concrete is cast on the waterproof layer 6 or a river structure is arranged to perform river bottom hardening treatment on the surface of the waterproof layer. When the bridge is under a road, a pavement structure (not shown in the figure) is further paved on the waterproof layer 6, which is cast by reinforced concrete.

[0036] In an embodiment, the two ends of the bridge are provided with abutment backfill 7 outside the support structure, and a soil base surface hardening layer 4 matching the shape of the two ends of the bridge is arranged between the abutment backfill 7 and the support structure, i.e. the soil base surface hardening layer 4 abuts against the end surface of the two ends of the bridge and the outer side of the V-shaped pier, so as to use the soil base surface hardening layer as the bottom formwork of the bridge side beam structure and the bearing layer during casting, i.e. no temporary support is needed at the two ends of the bridge as the support for casting, which effectively reduces the amount of construction measures structure such as temporary support and formwork required during casting of the bridge side beam, makes the construction process simpler, shortens the construction period, saves the construction measure cost, avoids the problems of landslide and soil erosion of the abutment backfill, and further avoids the damage and safety problems of the structure on the surface of the abutment backfill due to lack of support.

[0037] Preferably, the soil base surface hardening layer 4 is a concrete layer or a reinforced concrete layer.

[0038] In an embodiment, a bridge deck structure 101 is paved on the main beam 1, and a bridge head apron 5 is further paved on the abutment backfill 7 between the two ends of the main beam 1 and the ground, for connecting the ground layers at the two ends of the bridge.

[0039] In an embodiment, a sidewalk 102 and a bridge railing 103 are further provided on the two sides of the main beam 1, for facilitating pedestrian passage.

[0040] In other embodiments, the length direction of the tunnel structure adopts a multi-segment splicing structure, and the two groups of support structures of the bridge are arranged at the two ends of the same segment of the tunnel structure, and a settlement joint 11 is arranged at the two ends of the segment of the tunnel structure.

[0041] Embodiment 2

[0042] The construction method of the bridge and tunnel combined structure with thrust shown in the embodiment is used for constructing the construction structure of the bridge and tunnel combined structure with thrust described in embodiment 1, and specifically includes the following steps:

[0043] S1, excavate the foundation pit by the way of open excavation construction, and perform foundation pit support construction to avoid landslide during construction in the foundation pit;

[0044] S2, treat the bearing foundation in the foundation pit, and if the bearing capacity of the foundation does not meet the design requirement, the foundation needs to be reinforced first, and reinforcement piles or soft layer replacement are used for reinforcement, and the surface of the ground layer at the design elevation is treated for surface leveling;

[0045] S3, pour concrete on the bearing foundation to form a cushion layer, and perform leveling and sloping treatment;

[0046] S4, bind the bottom plate and the vertical wall steel bars on the cushion layer, and then use concrete to pour and form the bottom plate and the vertical wall on the cushion layer in sequence, bind the top plate steel bars, and pre-embed the steel bars at the position of the force transmission pier, and then use concrete to pour and form the top plate at the top end of the vertical wall to form a tunnel structure, and enclose the bottom plate, the vertical wall and the top plate to form at least one tunnel;

[0047] S5, after the tunnel structure maintenance reaches the preset strength, the foundation pit support members are removed, and the construction of the functional auxiliary structures such as the pipe trench and the pavement or the track in the tunnel is performed; at this time, the construction of the bridge structure on the tunnel structure can be simultaneously performed;

[0048] S6, fill the backfill soil on both sides of the foundation pit and pour the surface hardening layer of the soil foundation;

[0049] S7, set up the support and the formwork on the top plate, and pour the force transmission pier, the V-shaped pier and the main beam in sequence to build the arched bridge on the tunnel structure;

[0050] S8, after the bridge maintenance reaches the design strength, the support and the formwork are removed, and the water-resistant layer is paved on the top plate of the tunnel structure;

[0051] S9, complete the construction of the auxiliary facilities such as the bridge deck pavement, the bridge head coping, the sidewalk and the bridge railings.

[0052] In the above, the settlement joints need to be arranged between the two ends of the tunnel structure under the bridge and the tunnel structures of the adjacent sections, that is, the tunnel structure under the bridge is not rigidly connected with the tunnel structures of the adjacent sections to meet the settlement requirement of the bridge during use.

[0053] The technical scheme provided by the embodiments of the utility model is described in detail above, the principle and the implementation mode of the embodiments of the utility model are described by applying specific examples, the description of the above embodiments is only applicable to helping understand the principle of the embodiments of the utility model; meanwhile, for the general technical personnel in the field, the embodiments of the utility model will have changes in the specific implementation mode and the application range, and according to the above, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A construction structure of a bridge and a tunnel combined with thrust, characterized in that, The tunnel structure comprises a frame structure and a bridge arranged above the tunnel structure, the bridge comprises two groups of support structures arranged on the top of the tunnel structure along the length direction of the tunnel structure and a main beam arranged across the two support structures and in an arch shape, the support structure comprises at least one force transmission pier cast on the top of the tunnel structure and a V-shaped pier arranged on the force transmission pier and used for supporting the main beam, both ends of the bridge are provided with backfill soil arranged outside the support structure, and a soil base surface hardening layer is arranged between the backfill soil and the support structure.

2. The construction structure of a bridge and a tunnel combined with thrust according to claim 1, wherein Each group of the support structures comprises two force transmission piers arranged on the top of the tunnel structure along the width direction of the tunnel structure and two V-shaped piers one-to-one arranged on the force transmission piers and used for supporting the main beam.

3. The construction structure of a bridge and a tunnel combined with thrust according to claim 2, wherein The top of the tunnel structure is provided with a waterproof layer.

4. The construction structure of a bridge and a tunnel combined according to claim 3, wherein The waterproof layer is provided with a river hardening structure or a road surface structure.

5. The construction structure of a bridge and a tunnel combined according to claim 3, wherein The tunnel structure comprises a bottom plate arranged on a foundation, at least two vertical walls arranged on the bottom plate along the width direction of the bottom plate and a top plate arranged at the top end of the vertical walls, and at least one tunnel is enclosed by the bottom plate, the vertical walls and the top plate, so that the cross section of the tunnel structure is a single-hole or multi-hole box-shaped cross section.

6. The construction structure of a bridge and a tunnel combined according to claim 5, wherein The bottom of the bottom plate is provided with a cushion layer.

7. The construction structure of a bridge and a tunnel combined according to any one of claims 1 to 6, wherein The soil base surface hardening layer is a concrete layer or a reinforced concrete layer.

8. The construction structure of a bridge and a tunnel combined according to claim 7, wherein The backfill soil is provided with a bridge head apron connecting the ground surface and the main beam.

9. The construction structure of a bridge and a tunnel combined according to claim 1, wherein The cross section of the main beam is a single-box or multi-box box-shaped cross section.

Images