CN114250780A - Underpass tunnel structure for preventing lateral deformation of overpass pile foundation and construction method - Google Patents
Underpass tunnel structure for preventing lateral deformation of overpass pile foundation and construction method Download PDFInfo
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- CN114250780A CN114250780A CN202111680075.5A CN202111680075A CN114250780A CN 114250780 A CN114250780 A CN 114250780A CN 202111680075 A CN202111680075 A CN 202111680075A CN 114250780 A CN114250780 A CN 114250780A
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- 238000010276 construction Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000009412 basement excavation Methods 0.000 claims abstract description 9
- 238000012423 maintenance Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 101150054854 POU1F1 gene Proteins 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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Abstract
The tunnel supporting component is fixedly arranged in the tunnel foundation pit, the pressure guide component is sleeved on the outer side of the overpass pile foundation and connected with the pressure guide component, and the pressure guide component is arranged on the outer side of the overpass pile foundation, so that pressure unbalance of two sides of the overpass pile foundation is prevented in the tunnel foundation pit excavation process, the service life of the overpass is ensured, and the safe operation of the overpass in the lower tunnel construction process is ensured.
Description
Technical Field
The invention belongs to the technical field of tunnel construction, and particularly relates to a downward-penetrating tunnel structure for preventing lateral deformation of an overpass pile foundation and a construction method thereof.
Background
The cross section size in city highway tunnel and the buried depth in tunnel are all very big, so tunnel deep basal pit generally all adopts open cut method construction, before tunnel deep basal pit excavation, the country rock lateral pressure around foundation ditch and the pile foundation is in balanced state, but when the foundation ditch excavation back, the foundation ditch bearing structure who comprises foundation ditch maintenance pile, crown beam and horizontal support beam jointly can produce certain deformation or displacement, this just is equivalent to foundation ditch bearing structure to the lateral pressure reduction of foundation ditch country rock, consequently the country rock all around the foundation ditch can take place the displacement towards the direction of foundation ditch, the phenomenon such as crack can appear in the country rock, collapse. When the foundation pit of the tunnel is constructed under the urban viaduct by the open cut method, the lateral pressure on two sides of the viaduct pile foundation can not keep balanced with each other due to the lateral displacement generated by the surrounding rock of the foundation pit, and if the lateral displacement of the surrounding rock is not strictly controlled, the viaduct pile foundation can generate larger lateral deformation and even damage, and the operation safety of the viaduct is seriously threatened.
Disclosure of Invention
In view of the above disadvantages, the technical problem to be solved by the present invention is to provide a underpass tunnel structure for preventing lateral deformation of an overpass pile foundation and a construction method thereof, which solve the problem of unbalanced lateral pressure at two sides of a viaduct pile foundation during foundation pit construction of an underpass tunnel of an overpass, and ensure safe operation of the overpass during construction of an underpass tunnel.
In order to solve the technical problems, the invention adopts the technical scheme that,
the utility model provides a prevent tunnel structure that wears down of overpass pile foundation lateral deformation, includes tunnel foundation ditch and overpass pile foundation, and the tunnel foundation ditch takes shape between adjacent overpass pile foundation, still includes tunnel supporting component and pressure direction subassembly, and tunnel supporting component is fixed to be laid in the tunnel foundation ditch, and the pressure direction subassembly cover is established in the outside of overpass pile foundation, and tunnel supporting component is connected with the pressure direction subassembly.
Further, the pressure direction subassembly includes pile foundation connection structure and side pressure direction arch structure, and pile foundation connection structure lays in the outside of overpass pile foundation, and with tunnel foundation ditch adaptation, side pressure direction arch structure fixed connection is on pile foundation connection structure.
Further, pile foundation connection structure includes foundation ditch fender pile and side pressure guide pile, and the foundation ditch fender pile is formed on the lateral wall of tunnel foundation ditch, and side pressure guide pile is connected with the foundation ditch fender pile.
Furthermore, a foundation pit crown beam is fixedly formed on the foundation pit retaining pile, a side pressure guide crown beam is fixedly formed on the side pressure guide pile, and the foundation pit crown beam and the side pressure guide crown beam are connected to form a side pressure guide arch structure.
Further, the foundation pit crown beam comprises a fender pile connecting beam and a beam body connecting beam, the fender pile connecting beam is fixedly formed on the foundation pit fender pile, two ends of the beam body connecting beam are fixedly connected with the fender pile connecting beam respectively, and the side pressure guide crown beam is fixedly connected with the fender pile connecting beam.
Further, the tunnel supporting component comprises a lower-penetrating section tunnel and a non-lower-penetrating section tunnel which are connected with each other, the lower-penetrating section tunnel is arranged between adjacent overpass pile foundations, and similarly, the tunnel foundation pit comprises a lower-penetrating section tunnel foundation pit and a non-lower-penetrating section tunnel foundation pit which are connected with each other.
Furthermore, the lateral pressure guide piles are arranged in a circular arc shape.
The construction method of the underpass tunnel structure for preventing the lateral deformation of the overpass pile foundation comprises the following steps
Firstly, constructing foundation pit retaining piles according to the construction requirements of a tunnel, constructing side pressure guide piles on the outer side of a viaduct pile foundation, and connecting two ends of each side pressure guide pile with the foundation pit retaining piles into a whole;
after the construction of the foundation pit retaining pile and the side pressure guide pile is finished, the construction of a foundation pit crown beam and a side pressure guide pile crown beam is synchronously carried out, so that the foundation pit crown beam and the side pressure guide pile crown beam are integrated;
thirdly, excavation and support of a tunnel foundation pit of the non-underpass section and tunnel masonry construction are carried out;
fourthly, after the construction of the non-underpass section tunnel is completed, earth backfilling and tamping are carried out;
and (V) excavating and supporting the tunnel foundation pit of the lower penetrating section and constructing the tunnel.
Furthermore, in the step (four), earthwork backfill is performed to ensure that a foundation pit maintenance pile and a tunnel at the position of the side pressure guide arch structure support assembly are tightly tamped, and the foundation pit maintenance pile and the tunnel main body share the support counter force of the side pressure guide arch structure to ensure the stability of the arch structure;
furthermore, the lateral pressure guide arch structure support assembly is an arch structure support assembly which is formed by a foundation pit maintenance pile of a non-underpass section, a foundation pit crown beam and a non-underpass section tunnel.
The invention has the advantages that the pressure guide assembly is arranged on the outer side of the overpass pile foundation, so that the pressure unbalance of the two sides of the overpass pile foundation is prevented in the tunnel foundation pit excavation process, the service life of the overpass is ensured, and the safe operation of the overpass in the lower tunnel construction process is ensured.
Drawings
FIG. 1 is a schematic construction diagram of step one.
FIG. 2 is a schematic construction diagram of step two.
FIG. 3 is a schematic construction diagram of step three.
FIG. 4 is a schematic construction diagram of step five.
Fig. 5 is a stress schematic diagram of the tunnel structure after construction is completed.
Reference numerals: the structure comprises a tunnel foundation pit 1, an overpass pile foundation 2, a pile foundation connecting structure 3, a side pressure guide arch structure 4, a foundation pit fender pile 5, a side pressure guide pile 6, a foundation pit crown beam 7, a side pressure guide crown beam 8, a fender pile connecting beam 9, a beam body connecting beam 10, a lower-pass section tunnel 11, a non-lower-pass section tunnel 12, a lower-pass section tunnel foundation pit and a non-lower-pass section tunnel foundation pit 14.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The utility model provides a prevent tunnel structure under of overpass pile foundation lateral deformation, including tunnel foundation ditch 1 and overpass pile foundation 2, tunnel foundation ditch 1 takes shape between adjacent overpass pile foundation 2, still include tunnel supporting component and pressure direction subassembly, tunnel supporting component fixes and lays in tunnel foundation ditch 1, the outside at overpass pile foundation 2 is established to pressure direction subassembly cover, tunnel supporting component is connected with the pressure direction subassembly, through setting up the pressure direction subassembly in the outside of overpass pile foundation 2, be convenient for in tunnel foundation ditch 1 excavation process, prevent the both sides pressure imbalance of overpass pile foundation 2, guarantee the life of overpass, guarantee the safe operation of tunnel construction process height bridge under.
Pressure direction subassembly includes pile foundation connection structure 3 and side pressure direction arch structure 4, and pile foundation connection structure 3 lays in the outside of overpass pile foundation 2, and with 1 adaptation of tunnel foundation ditch, promptly, pour pile foundation connection structure 3 in 1 both sides of tunnel foundation ditch of treating the excavation, and 4 fixed connection of side pressure direction arch structure are on pile foundation connection structure 3, further make 3 integrative taking shape of pile foundation connection structure, improve the guide effect of pressure.
The pile foundation connecting structure 3 comprises a foundation pit guard pile 5 and a side pressure guide pile 6, the foundation pit guard pile 5 is formed on the side wall of the tunnel foundation pit 1, the side pressure guide pile 6 is connected with the foundation pit guard pile 5, and the side pressure guide pile 6 is used for bearing most unbalanced side pressure, so that the overpass pile foundation 2 in the pile foundation connecting structure 3 is in a stress balance state, and the service life of the overpass is ensured.
A foundation pit crown beam 7 is fixedly formed on the foundation pit enclosure pile 5, a lateral pressure guide crown beam 8 is fixedly formed on the lateral pressure guide pile 6, the foundation pit crown beam 7 and the lateral pressure guide crown beam 8 are integrally formed to form a lateral pressure guide arch structure 4, so that the lateral pressure guide arch structure 4 has better integrity, and the pressure guide assembly can bear larger unbalanced lateral pressure.
Foundation pit crown beam 7 includes fender pile tie-beam 9 and roof beam body tie-beam 10, fender pile tie-beam 9 is fixed to be taken shape on foundation pit fender pile 5, the both ends of roof beam body tie-beam 10 respectively with fender pile tie-beam 9 fixed connection, lateral pressure direction crown beam 8 and fender pile tie-beam 9 fixed connection, fender pile tie-beam 9, 8 integrative taking shape of lateral pressure direction crown beam, provide certain holding power to the fender pile tie-beam 9 of tunnel foundation pit 1 both sides through roof beam body tie-beam 10, thereby make the whole atress of pressure direction subassembly balanced, guarantee the stability of side pressure overpass.
The tunnel supporting component comprises a lower-penetrating-section tunnel 11 and a non-lower-penetrating-section tunnel 12 which are connected with each other, the lower-penetrating-section tunnel 11 is arranged between adjacent overpass pile foundations 2, and similarly, the tunnel foundation pit 1 comprises a lower-penetrating-section tunnel foundation pit 13 and a non-lower-penetrating-section tunnel foundation pit 14 which are connected with each other.
The lateral pressure guide piles 6 are arranged in an arc shape, unbalanced lateral pressure is convenient to guide through the arrangement of the arc-shaped lateral pressure guide piles 6, the foundation pit guard piles 5 and the beam body connecting beams 10 are convenient to better balance the lateral pressure, and the overpass pile foundation 2 is guaranteed to be in a stress balance state.
The construction method of the underpass tunnel structure for preventing the lateral deformation of the overpass pile foundation comprises the following steps
The construction method comprises the following steps that (I) according to the construction requirements of a tunnel, construction of foundation pit retaining piles is carried out, meanwhile, construction of side pressure guide piles is carried out on the outer side of a viaduct pile foundation, two ends of each side pressure guide pile are connected with the foundation pit retaining piles into a whole, in the construction process, the foundation pit retaining piles and the base pile columns in the side pressure guide piles are guaranteed to be mutually abutted, the integrity of the foundation pit retaining piles and the side pressure guide piles is improved, and construction of foundation pit crown beams and side pressure guide pile crown beams in the step (II) is facilitated;
after the construction of the foundation pit retaining pile and the side pressure guide pile is finished, the construction of a foundation pit crown beam and a side pressure guide pile crown beam is synchronously carried out, so that the foundation pit crown beam and the side pressure guide pile crown beam are integrated;
thirdly, excavation and support of a tunnel foundation pit of the non-underpass section and tunnel masonry construction are carried out;
fourthly, after the construction of the non-underpass section tunnel is completed, earth backfilling and tamping are carried out;
and (V) excavating and supporting the tunnel foundation pit of the lower penetrating section and constructing the tunnel.
Furthermore, in the step (four), earthwork backfill is performed to ensure that a foundation pit maintenance pile and a tunnel at the position of the side pressure guide arch structure support assembly are tightly tamped, and the foundation pit maintenance pile and the tunnel main body share the support counter force of the side pressure guide arch structure to ensure the stability of the arch structure;
furthermore, the lateral pressure guide arch structure support assembly is an arch structure support assembly which is formed by a foundation pit maintenance pile of a non-underpass section, a foundation pit crown beam and a non-underpass section tunnel.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the terms corresponding to the reference numerals in the figures are used more herein, the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. The utility model provides a prevent tunnel structure under that overpass pile foundation lateral deformation, includes tunnel foundation ditch (1) and overpass pile foundation (2), tunnel foundation ditch (1) takes shape between adjacent overpass pile foundation (2), its characterized in that still includes tunnel supporting component and pressure direction subassembly, and tunnel supporting component is fixed to be laid in tunnel foundation ditch (1), and the pressure direction subassembly cover is established in the outside of overpass pile foundation (2), and tunnel supporting component is connected with the pressure direction subassembly.
2. The underpass tunnel structure for preventing the lateral deformation of the overpass pile foundation according to claim 1, characterized in that the pressure guide assembly comprises a pile foundation connecting structure (3) and a lateral pressure guide arch structure (4), the pile foundation connecting structure (3) is arranged outside the overpass pile foundation (2) and is matched with the tunnel foundation pit (1), and the lateral pressure guide arch structure (4) is fixedly connected on the pile foundation connecting structure (3).
3. The underpass tunnel structure for preventing lateral deformation of an overpass pile foundation as claimed in claim 2, characterized in that the pile foundation connecting structure (3) comprises a foundation pit fender (5) and a lateral pressure guide pile (6), the foundation pit fender (5) is formed on the side wall of the tunnel foundation pit (1), and the lateral pressure guide pile (6) is connected with the foundation pit fender (5).
4. The underpass tunnel structure for preventing the lateral deformation of an overpass pile foundation according to claim 3, characterized in that a foundation pit crown beam (7) is fixedly formed on the foundation pit retaining pile (5), a lateral pressure guide crown beam (8) is fixedly formed on the lateral pressure guide pile (6), and the foundation pit crown beam (7) and the lateral pressure guide crown beam (8) are connected to form a lateral pressure guide arch structure (4).
5. The underpass tunnel structure for preventing the lateral deformation of an overpass pile foundation according to claim 4, characterized in that the foundation pit crown beam (7) comprises a fender post connecting beam (9) and a beam body connecting beam (10), the fender post connecting beam (9) is fixedly formed on the foundation pit fender post (5), two ends of the beam body connecting beam (10) are respectively and fixedly connected with the fender post connecting beam (9), and the lateral pressure guide crown beam (8) is fixedly connected with the fender post connecting beam (9).
6. The underpass tunnel structure for preventing lateral deformation of an overpass pile foundation as claimed in claim 5, wherein the tunnel supporting component comprises an underpass section tunnel (11) and a non-underpass section tunnel (12) which are connected with each other, the underpass section tunnel (11) is arranged between adjacent overpass pile foundations (2), and similarly, the tunnel foundation pit (1) comprises an underpass section tunnel foundation pit (13) and a non-underpass section tunnel foundation pit (14) which are connected with each other.
7. A underpass tunnel structure for preventing lateral deformation of overpass pile foundation as claimed in claim 3, wherein the lateral pressure guide piles (6) are arranged in a circular arc shape.
8. The method for constructing an underpass tunnel structure for preventing lateral deformation of an overpass pile foundation as claimed in any one of claims 1 to 7, comprising the steps of
Firstly, constructing foundation pit retaining piles according to the construction requirements of a tunnel, constructing side pressure guide piles on the outer side of a viaduct pile foundation, and connecting two ends of each side pressure guide pile with the foundation pit retaining piles into a whole;
after the construction of the foundation pit retaining pile and the side pressure guide pile is finished, the construction of a foundation pit crown beam and a side pressure guide pile crown beam is synchronously carried out, so that the foundation pit crown beam and the side pressure guide pile crown beam are integrated;
thirdly, excavation and support of a tunnel foundation pit of the non-underpass section and tunnel masonry construction are carried out;
fourthly, after the construction of the non-underpass section tunnel is completed, earth backfilling and tamping are carried out;
and (V) excavating and supporting the tunnel foundation pit of the lower penetrating section and constructing the tunnel.
9. The method for constructing an underpass tunnel structure for preventing the lateral deformation of the overpass pile foundation according to claim 8, wherein in the step (IV), the earth backfill ensures that the foundation pit maintenance pile at the support assembly of the lateral pressure guide arch structure is tightly tamped with the tunnel, and the foundation pit maintenance pile and the tunnel main body share the support counterforce of the lateral pressure guide arch structure to ensure the stability of the arch structure.
10. The method for constructing an underpass tunnel structure for preventing lateral deformation of an overpass pile foundation as claimed in claim 9, wherein the lateral pressure guide arch structure support assembly is an arch structure support assembly consisting of a non-underpass section of foundation pit maintenance pile, a foundation pit crown beam and a non-underpass section of tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111680075.5A CN114250780A (en) | 2021-12-31 | 2021-12-31 | Underpass tunnel structure for preventing lateral deformation of overpass pile foundation and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111680075.5A CN114250780A (en) | 2021-12-31 | 2021-12-31 | Underpass tunnel structure for preventing lateral deformation of overpass pile foundation and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN114250780A true CN114250780A (en) | 2022-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111680075.5A Pending CN114250780A (en) | 2021-12-31 | 2021-12-31 | Underpass tunnel structure for preventing lateral deformation of overpass pile foundation and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114250780A (en) |
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2021
- 2021-12-31 CN CN202111680075.5A patent/CN114250780A/en active Pending
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