CN217026767U - Existing culvert structure is striden on open cut tunnel - Google Patents
Existing culvert structure is striden on open cut tunnel Download PDFInfo
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- CN217026767U CN217026767U CN202123239244.XU CN202123239244U CN217026767U CN 217026767 U CN217026767 U CN 217026767U CN 202123239244 U CN202123239244 U CN 202123239244U CN 217026767 U CN217026767 U CN 217026767U
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Abstract
The utility model discloses an existing culvert structure striding on an open cut tunnel, which comprises: an existing culvert is provided; the tunnel structure is obliquely arranged above the existing culvert; a plurality of pile foundations bearing the tunnel structure; protective structure, including putting sloping module and strutting the module, put the scope that sloping module and strutting the module cooperation injectd tunnel structure, put the sloping module and set up respectively in two crossing departments of tunnel structure and existing culvert, strut the module and set up all the other positions in the scope adjacent to each module of putting the slope. Through the local adoption put the slope module to enclose into the foundation ditch type with strutting the module cooperation, reduced the foundation ditch scale, have good control earth's surface deformability, through the vertical load that bears tunnel structure by the pile foundation, make existing culvert and newly-built tunnel respectively be independent atress system, avoided mutual influence between them, guarantee the safety of existing culvert and newly-built tunnel long-term service life after accomplishing.
Description
Technical Field
The utility model relates to the technical field of tunnel construction, in particular to an existing culvert structure spanned on an open cut tunnel.
Background
In the process of urban traffic construction, the situation that a tunnel passes through an existing underground culvert is inevitable, and the difficulty and the key point of project implementation are often caused by the complex urban environment and the existence of sensitive building structures, roads, pipelines and the like around the tunnel. If the existing culvert is reformed, the construction process is complex, the engineering quantity is enlarged, and the construction period is prolonged.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the structure of the existing culvert spanning the open cut tunnel, which can avoid the reconstruction of the existing culvert, has simple and convenient construction process, does not influence the normal use function of the existing culvert, and ensures the safety of the existing culvert and the newly-built tunnel structure in the construction period and the use period after the construction.
According to the embodiment of the first aspect of the utility model, the existing culvert structure strides on the open-cut tunnel comprises:
the existing culvert is available;
the tunnel structures are arranged above the existing culvert at intervals, and the tunnel structures and the existing culvert are arranged in an oblique crossing manner;
the plurality of pile foundations bear the tunnel structure, and a preset clear distance is reserved between each pile foundation and the existing culvert;
the protective structure comprises slope-releasing modules and supporting modules, wherein the slope-releasing modules and the supporting modules are matched to limit the range of the tunnel structure, the slope-releasing modules are arranged at two crossed positions of the tunnel structure and the existing culvert respectively, and the supporting modules are adjacent to other positions of the slope-releasing modules in the range.
The open-cut tunnel striding over the existing culvert structure according to the embodiment of the first aspect of the utility model has at least the following beneficial effects: the slope-releasing module is locally adopted and is matched with the supporting module to form a foundation pit type, so that the normal function of the existing culvert during construction can be ensured, the transformation of the existing culvert is avoided, the depth of the foundation pit is reduced, the scale of the foundation pit is reduced, the excavation range is small, the ground surface deformation control capability is good, the influence on surrounding sensitive buildings, roads, pipelines and the like is reduced, and the safety of the surrounding environment during construction is ensured; stride existing culvert on the type through adopting the pile foundation to form "underground bridge", bear tunnel structure's vertical load by the pile foundation, make existing culvert and newly-built tunnel respectively be independent atress system, avoided mutual influence between them, guarantee the safety of existing culvert and newly-built tunnel long-term service life after accomplishing.
According to the embodiment of the first aspect of the utility model, the open-cut tunnel is spanned by an existing culvert structure, the support modules comprise waterproof curtains, support piles and crown beams which are arranged in sequence, part of the support modules are arranged to form an opening which protrudes outwards, and at least part of the slope releasing module is arranged at the opening.
According to the embodiment of the first aspect of the present invention, an existing culvert structure is spanned on the open trench tunnel, at least two diagonal braces which are obliquely arranged with the existing culvert and at least two diagonal braces which are arranged in parallel with the existing culvert are arranged in the tunnel structure, the diagonal braces are connected to the support modules at two sides of the same slope-releasing module, and the diagonal braces are connected to the support modules at the same side of the two slope-releasing modules, so that the diagonal braces and the diagonal braces enclose a closed plane structure.
According to the open-cut tunnel, an existing culvert structure is spanned, and the waterproof curtain adopts close-packed cement mixing piles.
According to the embodiment of the first aspect of the utility model, the open-cut tunnel is spanned by an existing culvert structure, the pile foundation adopts a cast-in-place pile, and at least part of the pile foundation is provided with a steel casing.
According to the embodiment of the first aspect of the utility model, the open-cut tunnel is spanned with an existing culvert structure, and a cushion layer is arranged between the pile foundation and the tunnel structure.
The open-cut tunnel according to the embodiment of the first aspect of the present invention is spanned by an existing culvert structure, and an included angle between a center line of the tunnel structure and the existing culvert is 75 °.
The open-cut tunnel according to the embodiment of the first aspect of the utility model is spanned with an existing culvert structure, and a concrete protection structure is arranged between the slope-releasing module and the supporting module.
According to the embodiment of the first aspect of the utility model, the open-cut tunnel is spanned with an existing culvert structure, and a reinforcing mesh or a hanging mesh is arranged in the concrete protection structure.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The utility model is further described below with reference to the drawings and examples;
FIG. 1 is a plan view of an embodiment of the present invention;
fig. 2 is a cross-sectional view of an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is at least two, and greater than, less than, more than, etc. are understood as excluding the present numbers, and above, below, within, etc. are understood as including the present numbers. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present invention, unless otherwise specifically limited, terms such as set, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
Referring to fig. 1 to 2, an open-cut tunnel according to an embodiment of the first aspect of the present invention straddles an existing culvert structure, and includes an existing culvert 2, a tunnel structure 9, a plurality of pile foundations 1, and a protective structure.
In some specific construction embodiments, the existing culvert 2 is a flood discharging culvert, the structural type is an arch culvert, the geological conditions are mainly filled with soil, the top plate and the bottom plate are of prefabricated reinforced concrete structures, and the side walls are of stone masonry structures.
Wherein the tunnel structures 9 are arranged above the existing culvert 2 at intervals, and the tunnel structures 9 are obliquely arranged with the existing culvert 2; in some specific construction embodiments, the tunnel structure 9 is a U-shaped groove structure, the clear distance between the top plate of the existing culvert 2 and the bottom plate structure 8 of the tunnel structure 9 is about 1.5m, and the included angle between the existing culvert 2 and the center line of the tunnel structure 9 is about 75 °.
Each pile foundation 1 is used for bearing a tunnel structure 9 to form an underground bridge type to span an existing culvert 2, and a preset clear distance is reserved between each pile foundation 1 and the existing culvert 2, so that the mutual independence and no influence of the pile foundations 1 and the existing culvert 2 are ensured; in some specific construction embodiments, the clear distance between the pile foundation 1 and the existing culvert 2 is more than or equal to 1 m.
The protective structure comprises slope releasing modules 11 and supporting modules, the slope releasing modules 11 and the supporting modules are matched to limit the range of the tunnel structure 9, the slope releasing modules 11 are respectively arranged at two crossed positions of the tunnel structure 9 and the existing culvert 2, and the supporting modules are adjacent to other positions of the slope releasing modules 11 in the range. It can be understood that the protective structure is used for bearing main horizontal soil pressure or landslide thrust, but the top of the existing culvert 2 cannot be used as the support piles 5, so that a local arrangement mode of taking and placing slopes is adopted at two intersections of the tunnel structure 9 and the existing culvert 2, namely the top of the culvert, and the support piles 5 are used for bearing transverse thrust in other areas, so that normal construction of the tunnel structure 9 is guaranteed on the basis of not influencing the existing culvert 2.
The slope-laying module 11 is locally adopted and is matched with the supporting module to form a foundation pit type, so that the normal function of the existing culvert 2 in the construction period can be ensured, the transformation of the existing culvert 2 is avoided, the depth of the foundation pit is reduced, the scale of the foundation pit is reduced, the excavation range is small, the ground surface deformation control capability is good, the influence on surrounding sensitive building structures, roads, pipelines and the like is reduced, and the safety of the surrounding environment in the construction period is ensured; stride existing culvert 2 on the type through adopting pile foundation 1 to form "underground bridge", bear the vertical load of tunnel structure 9 by pile foundation 1, make existing culvert 2 and newly-built tunnel respectively be independent atress system, avoided mutual influence between them, guarantee the safety of existing culvert 2 and newly-built tunnel long-term service life after accomplishing.
In some embodiments of the present invention, the supporting modules include a waterproof curtain 4, supporting piles 5 and a crown beam 7, which are sequentially arranged, and a part of the supporting modules are arranged to form an opening protruded outward, and at least a part of the slope-releasing module 11 is disposed at the opening. It will be appreciated that the waterproof curtains 4 and the support piles 5 are arranged in sequence from the outside to the inside, and the crown beams 7 are used to support, distribute and transfer the load, and connect all the support piles 5 together to prevent the top edge of the foundation pit from collapsing. It can be understood that the cast-in-place pile is better adopted for the support piles 5.
In some embodiments of the present invention, the support modules further include at least two diagonal supports arranged obliquely to the existing culvert 2 and at least two diagonal supports arranged parallel to the existing culvert 2, the diagonal supports are connected to the support modules on both sides of the same slope-releasing module 11, and the diagonal supports are connected to the support modules on the same side of the two slope-releasing modules 11, so that each pair of the diagonal supports and each diagonal support enclose a closed plane structure. The inner support 6 is arranged to ensure the safety of construction by combining a special-shaped protective structure, and is welded with an embedded part in the crown beam 7 after the whole assembly is finished.
In some embodiments of the utility model, the concrete shield between the landslide module 11 and the support modules protects the slope from weathering erosion and rain wash from the outside and from the inside. Wherein be equipped with reinforcing bar net or string net in the concrete protective structure, the construction mode effect through slope string net whitewashing is better.
Referring to fig. 1 to 2, a construction method for spanning an existing culvert structure on an open-cut tunnel according to a second aspect of the present invention includes the following steps:
s1: according to the position of the existing culvert 2, confirming the relative position relation between the tunnel structure 9 and the existing culvert 2, leveling the field, and constructing the pile foundation 1 of the tunnel structure 9, wherein reliable measures are taken in the construction process to ensure the safety of the existing culvert 2, and a preset clear distance is reserved between the pile foundation 1 and the existing culvert 2;
s2: constructing a waterproof curtain 4 of the foundation pit;
s3: the construction of the support piles 5 of the foundation pit is carried out, wherein a slope is excavated in the longitudinal overlapping position range of the tunnel structure 9 and the existing culvert 2, the position of the slope is matched, the support piles 5 are arranged outside the overlapping position range of the tunnel structure 9 and the existing culvert 2, the construction range of the tunnel structure 9 is limited by the position of the slope and the support piles 5, the center distance of the adjacent support piles 5 is preferably smaller than 2D, and the clear distance between the support piles 5 is not larger than 1.0 m.
S4: constructing a crown beam 7 and an inner support 6 of the foundation pit by combining the special-shaped distribution of the support piles 5 on the plane;
s5: performing foundation pit excavation construction, wherein earth excavation is started after the protective structure of the foundation pit reaches the design strength;
s6: the construction and backfilling of the tunnel structure 9 are performed.
Further, the mutual influence of the tunnel structure 9 and the existing culvert 2 may be analyzed before S1, and the mutual influence during the construction period and the use period after completion may be evaluated according to the spatial relationship between the open-cut tunnel structure 9 and the existing culvert 2 in combination with the structural style of the existing culvert 2, so as to provide a feasible construction method.
By adopting the slope-releasing construction locally, and arranging the support piles 5 and the inner supports 6 according to the slope-releasing positions, the three cooperate to form a foundation pit, the normal function of the existing culvert 2 during the construction period can be ensured, the transformation of the existing culvert 2 is avoided, the depth of the foundation pit is reduced, the scale of the foundation pit is reduced, the excavation range is small, the ground surface deformation control capability is good, the influence on peripheral sensitive building structures, roads, pipelines and the like is reduced, and the safety of the peripheral environment during the construction period is ensured; stride existing culvert 2 on the type through adopting pile foundation 1 to form "underground bridge", bear the vertical load of tunnel structure 9 by pile foundation 1, make existing culvert 2 and newly-built tunnel respectively be independent atress system, avoided mutual influence between them, guarantee the safety of existing culvert 2 and newly-built tunnel long-term service life after accomplishing.
In some embodiments of the present invention, in S1, the pile foundation 1 is a cast-in-place pile, at least part of the pile foundation 1 is provided with a steel casing 3, and at least part of the pile foundation 1 is perforated with the steel casing 3 to protect the existing culvert 2.
In some embodiments of the present invention, in S2, the waterproof curtain 4 is closely packed cement mixing piles, and the waterproof curtain 4 penetrates through the permeable layer and enters a predetermined depth below the bottom of the foundation pit to prevent or reduce the groundwater flow from the side wall and the bottom of the foundation pit.
In some embodiments of the present invention, in S3, water-stopping curtains 4 and support piles 5 are also respectively disposed at both sides of the downhill position, and the water-stopping curtains 4 and the support piles 5 disposed outside the overlapping position range of the tunnel structure 9 and the existing culvert 2 are respectively connected to form a whole. It can be understood that the position of the slope is connected with the supporting piles 5 to form a continuous supporting structure, and the effect of bearing the transverse thrust is achieved. Therefore, the waterproof curtain 4 and the support piles 5 are additionally arranged on the two sides of the slope-releasing position, and comprehensive protection is guaranteed.
In some embodiments of the present invention, in S4, the top of the support piles 5 is reserved with steel bars anchored into the crown beams 7, the inner support 6 includes a diagonal support perpendicular to the existing culvert 2 and a diagonal support parallel to the existing culvert 2, and the diagonal support respectively connect the partial crown beams 7, thereby ensuring the quality of the foundation pit.
In some embodiments of the utility model, in S5, the ground around the boundary of the foundation pit is hardened and drainage ditches are provided before excavation, the foundation pit is constructed by a back excavation method and symmetrically excavated layer by layer, when the foundation pit is excavated to a distance of 300mm from the bottom of the pit, manual excavation must be adopted to avoid the foundation pit from being over-excavated, a closed cushion layer 10 is laid after the foundation pit is excavated to the bottom surface of the foundation pit, and a mesh-hung concrete spraying protection is adopted between the position of the slope and the piles of the support piles 5. The construction safety can be ensured by timely constructing the side slope and protecting the piles.
In some embodiments of the present invention, in S6, the bottom plate waterproofing, the bottom plate structure 8, the backfilling plain concrete on the two sides of the bottom plate, the side wall structure, and the side wall waterproofing are sequentially performed to form the tunnel structure 9, after the structure reaches the design strength, the stone chips are backfilled on the two sides of the side wall, and the top of the pile foundation 1 is reserved with a steel bar with a preset length for anchoring into the bottom plate structure 8 of the tunnel structure 9, preferably, the reserved length is greater than or equal to 30d for anchoring into the bottom plate structure 8 of the tunnel structure 9, so as to ensure the reliable connection between the two.
All possible combinations of the technical features of the embodiments described above may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The utility model provides an existing culvert structure is striden on open cut tunnel which characterized in that includes:
the existing culvert is available;
the tunnel structures are arranged above the existing culvert at intervals, and the tunnel structures and the existing culvert are obliquely arranged;
the pile foundations bear the tunnel structure, and a preset clear distance is reserved between each pile foundation and the existing culvert;
the protective structure comprises a slope releasing module and a supporting module, wherein the slope releasing module and the supporting module are matched to limit the range of the tunnel structure, the slope releasing module is arranged at two crossed positions of the tunnel structure and the existing culvert respectively, and the supporting module is adjacent to each slope releasing module and is arranged at other positions in the range.
2. The open-cut tunnel over-existing culvert structure of claim 1, characterized in that: the supporting module comprises a waterproof curtain, supporting piles and a crown beam which are sequentially arranged, part of the supporting module is arranged to form an opening protruding outwards, and at least part of the slope-releasing module is arranged at the opening.
3. The open-cut tunnel according to claim 2, wherein the existing culvert structure is spanned on the open-cut tunnel, and the culvert structure is characterized in that: the supporting module further comprises at least two diagonal supports arranged in an oblique crossing manner with the existing culvert and at least two diagonal supports arranged in parallel with the existing culvert, the diagonal supports are connected to the supporting modules on two sides in the same slope-releasing module, and the diagonal supports are connected to the supporting modules on the same side in the two slope-releasing modules, so that the diagonal supports and the diagonal supports enclose a closed plane structure.
4. The open-cut tunnel according to claim 2, wherein the existing culvert structure is spanned on the open-cut tunnel, and the culvert structure is characterized in that: the waterproof curtain adopts closely-arranged cement mixing piles.
5. The open-cut tunnel over-existing culvert structure of claim 1, characterized in that: the pile foundation adopts bored concrete pile, at least part be equipped with the steel on the pile foundation and protect a section of thick bamboo.
6. The open-cut tunnel over-existing culvert structure of claim 1, characterized in that: and a cushion layer is arranged between the pile foundation and the tunnel structure.
7. The open-cut tunnel according to claim 1, wherein the existing culvert structure is spanned thereon, and the culvert structure is characterized in that: the included angle between the central line of the tunnel structure and the existing culvert is 75 degrees.
8. The open-cut tunnel over-existing culvert structure of claim 1, characterized in that: the tunnel structure is a U-shaped groove structure.
9. The open-cut tunnel over-existing culvert structure of claim 1, characterized in that: the slope-caving module and the concrete protection structure between the supporting modules.
10. The open-cut tunnel over-existing culvert structure of claim 9, wherein: and a reinforcing mesh or a hanging mesh is arranged in the concrete protection structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123239244.XU CN217026767U (en) | 2021-12-21 | 2021-12-21 | Existing culvert structure is striden on open cut tunnel |
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| CN202123239244.XU CN217026767U (en) | 2021-12-21 | 2021-12-21 | Existing culvert structure is striden on open cut tunnel |
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| CN217026767U true CN217026767U (en) | 2022-07-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319164A (en) * | 2021-12-21 | 2022-04-12 | 广州市市政工程设计研究总院有限公司 | Open-cut tunnel upper-span existing culvert structure and construction method thereof |
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2021
- 2021-12-21 CN CN202123239244.XU patent/CN217026767U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319164A (en) * | 2021-12-21 | 2022-04-12 | 广州市市政工程设计研究总院有限公司 | Open-cut tunnel upper-span existing culvert structure and construction method thereof |
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