CN211006688U - Excavation enclosure structure for excavation of foundation pit above tunnel - Google Patents
Excavation enclosure structure for excavation of foundation pit above tunnel Download PDFInfo
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- CN211006688U CN211006688U CN201921730531.0U CN201921730531U CN211006688U CN 211006688 U CN211006688 U CN 211006688U CN 201921730531 U CN201921730531 U CN 201921730531U CN 211006688 U CN211006688 U CN 211006688U
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- foundation pit
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Abstract
The utility model relates to an excavation envelope of tunnel top foundation ditch excavation. The tunnel uplift pile comprises at least two uplift pile groups arranged on two sides of a corresponding tunnel, wherein each uplift pile group comprises a plurality of uplift piles arranged at intervals along the extending direction of the tunnel; the uplift pile comprises an uplift pile group, a crown beam and a plurality of uplift piles, wherein the uplift piles are connected in series into a whole; the anti-floating structure is characterized by further comprising anti-floating plates and partition wall supporting structures, wherein the anti-floating plates are paved on the tops of all the crown beams; the partition wall supporting structure is used for supporting a wall body to be excavated in the excavation process of the foundation pit. Through adopting the utility model discloses an excavation envelope can play the effect of limit excavation limit enclosure, and the back is accomplished in the foundation ditch excavation, because the setting of resistance to plucking pile group, hat roof beam, anti kickboard, ground around the tunnel can be consolidated by the lock jail to avoided the easy uplift condition of warping of tunnel and foundation ditch basement, reduced the influence of the follow-up construction of foundation ditch to the tunnel.
Description
Technical Field
The utility model relates to a foundation ditch excavation enclosure technical field especially relates to an excavation envelope of tunnel top foundation ditch excavation.
Background
Along with the development of city subway tunnel, the building that the subway was built along the line is more and more, and the deep basal pit excavation problem that brings is also more and more, and under the general condition, excavation foundation ditch will be along with the disturbance to the subway tunnel in subway tunnel top, and then causes the uplift deformation of subway tunnel, and this excavation construction for the foundation ditch has brought technical challenge and risk. The supporting structure that foundation ditch support above subway at present mainly adopted is cast-in-place supporting structure, ubiquitous engineering cost height, construction cycle scheduling problem.
In order to ensure the safe operation of the underground tunnel, the underground continuous wall is deepened and thickened in the engineering, but the cast-in-place structure has higher manufacturing cost and longer construction period, and particularly under the condition that the underground continuous wall of the underground tunnel is protected to be built, the thickness and the depth of the underground continuous wall are difficult to increase. Therefore, an excavation enclosure structure specially aiming at excavating a foundation pit above the tunnel is urgently needed to be researched so as to reduce the disturbance of excavation of the foundation pit to the tunnel.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an excavation envelope of tunnel top foundation ditch excavation for solve among the prior art tunnel top excavation foundation ditch and cause the disturbance to the tunnel easily, and then cause the technical problem that the tunnel uplift warp easily.
In order to realize the above purpose, the utility model provides an excavation envelope of tunnel top foundation ditch excavation adopts following technical scheme:
an excavation enclosure structure for excavation of a foundation pit above a tunnel comprises at least two uplift pile groups arranged on two sides of the corresponding tunnel, wherein each uplift pile group comprises a plurality of uplift piles arranged at intervals along the extending direction of the tunnel; the uplift pile comprises an uplift pile group, a crown beam and a plurality of uplift piles, wherein the uplift piles are connected in series into a whole; the anti-floating structure is characterized by further comprising anti-floating plates and partition wall supporting structures, wherein the anti-floating plates are paved on the tops of all the crown beams; the partition wall supporting structure is used for supporting a wall body to be excavated in the excavation process of the foundation pit.
Further, the uplift pile comprises a hollow pipe and filling materials filled in the hollow pipe.
Furthermore, the hollow pipe is arranged in a split mode, and the hollow pipe comprises a plurality of hollow pipe sections which are sequentially spliced and fixed.
Furthermore, a plurality of joint locking openings which correspond to the uplift piles in the same uplift pile group one by one are arranged in the crown beam, and the joint locking openings are used for inserting the top ends of the uplift piles.
Furthermore, the crown beams are arranged in a split mode, each crown beam comprises a plurality of crown beam plates used for splicing and assembling, and the crown beam plates are connected and fixed through connecting pieces.
Furthermore, the joint locking notch is formed by splicing two adjacent crown beam plates, and a groove structure used for splicing the joint locking notch is arranged on the corresponding crown beam plate.
Further, the connecting piece is a bolt.
Furthermore, partition wall supporting construction is provided with a plurality of slotted holes that supply the stock to penetrate including strutting partition wall and stock on strutting the partition wall.
Further, the device also comprises a net hanging and concrete spraying structure paved on the slope surface of the excavated foundation pit.
Furthermore, the anti-floating plate is fixedly connected with each anti-floating pile.
The embodiment of the utility model provides an excavation envelope of tunnel top foundation ditch excavation compares with prior art, and its beneficial effect lies in: through adopting the utility model discloses an excavation envelope can play the effect of enclosing while excavating in the work progress, and the back is accomplished in the foundation ditch excavation, because the setting of resistance to plucking pile group, hat roof beam, anti floating plate, ground around the tunnel can be locked firmly and is consolidated to avoided the easy uplift condition of warping of tunnel and foundation ditch basement, reduced the influence of the follow-up construction of foundation ditch to the tunnel. In addition, the partition wall supporting structure can be recycled after construction is finished, so that the construction cost is saved; because all components can be prefabricated in a factory, the standardization and unification of component machining are realized, the supporting efficiency of the foundation pit in the later period is improved, and the construction period is shortened.
Drawings
FIG. 1 is a schematic cross-sectional view of an excavation enclosure structure for excavation of a foundation pit above a tunnel according to an embodiment of the present invention;
fig. 2 is a schematic plan view of the overall structure of the excavation enclosure structure for excavation of the foundation pit above the tunnel according to the embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of the excavation enclosure structure of the excavation of the foundation pit above the tunnel according to the embodiment of the present invention;
fig. 4 is a schematic view of the overall structure of the crown beam according to the embodiment of the present invention;
fig. 5 is an overall structure schematic diagram of the uplift pile according to the embodiment of the present invention.
In the figure, 1-tunnel, 2-uplift pile, 201-hollow pipe section, 202-bolt connecting port, 3-support pile, 4-water cut curtain, 5-crown beam, 501-crown beam plate, 502-joint locking port, 503-connecting piece, 6-floating resisting plate, 7-anchor rod, 8-support partition wall, 9-inner support, 10-net concrete spraying structure, 11-partition wall excavation, 12-partition wall inner excavation and 13-slope excavation.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
As shown in fig. 1 to 5, the present invention provides an excavation enclosure for excavation of a foundation pit above a tunnel (hereinafter referred to as excavation enclosure for short) according to a preferred embodiment. The excavation enclosure structure comprises at least two uplift pile groups arranged on two sides of the corresponding tunnel 1, and each uplift pile group comprises a plurality of uplift piles 1 arranged at intervals along the extending direction of the tunnel 1; the uplift pile structure is characterized by further comprising a crown beam 5 for connecting the uplift piles 1 in the same uplift pile group in series into a whole, wherein the crown beam 5 is arranged at the pile top position of each uplift pile 1; the anti-floating structure further comprises anti-floating plates 6 and partition wall supporting structures, wherein the anti-floating plates 6 are laid on the tops of the crown beams 5; the partition wall supporting structure is used for supporting a wall body to be excavated in the excavation process of the foundation pit.
Specifically, the tunnel 1, the support piles 3, and the water intercepting curtain 4 in this embodiment are all existing structures that are built in advance. Two tunnels 1 are arranged, the two tunnels 1 extend in parallel, and the support piles 3 and the water intercepting curtains 4 are sequentially arranged on the outer sides of the two tunnels 1, as shown in fig. 1. Note that, in this embodiment, a foundation pit needs to be excavated above the two tunnels 1.
In this embodiment, the uplift pile groups are four rows, each tunnel 1 corresponds to two rows of uplift pile groups, and specifically, two rows of uplift pile groups are arranged on both sides of each tunnel 1. In this embodiment, each uplift pile group includes a plurality of uplift piles 1 arranged at intervals along the extending direction of the tunnel 1, as shown in fig. 2. The uplift pile 1 in this embodiment includes a hollow pipe and a filler filled in the hollow pipe, and the filler is concrete cement paste. In the present embodiment, the hollow pipes are separately arranged, as shown in fig. 5, each hollow pipe includes two hollow pipe sections 201, two ends of each hollow pipe section 201 are provided with bolt connection ports 202 (i.e., connection flanges), and the two hollow pipe sections 201 are fixedly connected together by bolts during installation. Before a foundation pit is excavated, each uplift pile 1 needs to be constructed, each hollow pipe needs to be driven into the pile firstly, and then cement paste needs to be poured into the hollow pipe.
In this embodiment, the crown beam 5 is plate-shaped, and a plurality of connector locking openings 502 corresponding to the uplift piles 1 in the same uplift pile group one by one are provided in the crown beam 5, and the connector locking openings 502 are used for inserting the top ends of the uplift piles 1. The joint locking notch 502 is a through hole provided on the crown beam 5. In order to facilitate the assembly of the crown beam 5, the crown beam 5 in this embodiment is a split structure, as shown in fig. 4, that is, each crown beam 5 includes a plurality of crown beam plates 501 for splicing and assembling, each crown beam plate 501 is provided with a groove structure for splicing and forming a joint locking notch 502, each uplift pile 1 in this embodiment is cylindrical, and each joint locking notch 502 is square, so correspondingly, the groove structure on each crown beam plate 501 is a rectangular groove, and the joint locking notch 502 can be formed by splicing and assembling corresponding rectangular grooves of two adjacent crown beam plates 501. Two crown beam plates 501 that are located uplift pile 1 both sides in this embodiment are connected fixedly through connecting piece 503 between, also connect fixedly through connecting piece 503 between two adjacent crown beam plates 501 that are located uplift pile 1 homonymy, and connecting piece 503 specifically is the bolt in this embodiment, is provided with on each crown beam plate 501 to supply bolt male jack, and the setting of bolt has avoided two adjacent crown beam plates 501 to take place the condition of relative slip. In other embodiments, the connecting member 503 may be a long bolt, a long screw, or the like. In this embodiment, the anti-floating plate 6 is located above the crown beam 5, and the anti-floating plate 6 is fixedly connected with the top end of each uplift pile 1 and is anchored in a fixed manner. The anti-floating plates 6 and the anti-floating piles 1 form a gate-type anti-floating structure in the present embodiment. In other embodiments, the anti-floating plate 6, the anti-floating pile 1 and the crown beam 5 are integrally fixed in a manner of integral casting, threaded connection or the like.
The partition wall supporting structure in this embodiment includes supporting partition wall 8 and stock 7, and supporting partition wall 8 is last to be provided with a plurality of slotted holes that supply stock 7 to penetrate. In this embodiment, the anchor rod 7 is fixed to the supporting partition wall 8 through a bolt, so that the anchor rod 7 is conveniently fixed to the supporting partition wall 8, the anchor rod 7 is provided with a flange connection structure, and the supporting partition wall 8 is provided with a threaded hole for assembling the bolt threads. In this embodiment, a concrete hanging and spraying structure 10 is further laid on the surface of the excavated foundation pit, and the concrete hanging and spraying structure is a common construction structure in building construction, and thus detailed description is omitted in this embodiment.
The utility model discloses a working process does: firstly, construction operation needs to be carried out on each uplift pile 1, during construction, each hollow pipe needs to be driven into rock soil, and then cement paste needs to be poured into each hollow pipe. Then, each supporting partition wall 8 is hung into a groove which is drilled in advance, and it should be noted that the groove is arranged in the rock soil in advance according to a set position. As shown in fig. 1, in the present embodiment, four supporting partitions 8 are provided on the same cross section, so that four rows of grooves are also required to be arranged on the same cross section in advance.
When excavating the foundation pit, need at first carry out excavation 11 between the partition wall, excavation 11 between the partition wall is the layering excavation, excavates from last to layering down promptly, needs the while excavation to excavate the in-process and assembles stock 7, and the both ends of the stock 7 of installation are respectively with two middle retaining wall 8 fixed connection to it is in the level to need to guarantee to strut stock 7 between the retaining wall 8 in the middle two. After the excavation is finished, the anti-floating plate 6 is applied to the bottom of the pit excavated 11 between the partition walls.
Then, the inner partition wall excavation 12 needs to be performed, the inner partition wall excavation 12 performs excavation on two outer sides of the two middle supporting partition walls 8, the excavation and the anchoring need to be performed during excavation, that is, the inner supports 9 need to be implanted into the two supporting partition walls 8 located on the outer sides, in this embodiment, the inner supports 9 are also anchor rods, and different from the inner partition wall excavation 11, the anchor rods of the inner partition wall excavation 12 are implanted obliquely downward. After the excavation 12 in the two partition walls is completed, the crown beams 5 are assembled at the bottom of the excavation 12 in the partition walls, that is, the crown beam plates 501 are spliced on two sides of each uplift pile 1, and then the corresponding crown beam plates 501 are connected into a whole by using bolts. And then applying an anti-floating plate 6 above the crown beam 5.
And finally, carrying out slope-releasing excavation 13 on the outer sides of the supporting partition walls 8 at the two sides, applying a floating-resistant plate 6 to the pit bottom after the excavation is finished, and paving a net-hanging concrete-spraying structure 10 on the corresponding broken surface. And then, the supporting partitions 8 and the anchor rods 7 are recovered.
To summer up, the embodiment of the utility model provides an excavation envelope of tunnel top foundation ditch excavation, it is through adopting the utility model discloses an excavation envelope can play the effect of limit excavation limit enclosure in the work progress, and the back is accomplished in the foundation ditch excavation, because resistance to plucking pile group, hat roof beam 5, anti floating plate 6's setting, the ground around tunnel 1 can be consolidated by the lock jail to avoid the easy uplift condition of deformation of tunnel 1 and foundation ditch basement, reduced the influence of the follow-up construction of foundation ditch to tunnel 1. In addition, the partition wall supporting structure can be recycled after construction is finished, so that the construction cost is saved; because all components can be prefabricated in a factory, the standardization and unification of component machining are realized, the supporting efficiency of the foundation pit in the later period is improved, and the construction period is shortened.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides an excavation envelope of tunnel top foundation ditch excavation which characterized in that: the tunnel uplift pile comprises at least two uplift pile groups arranged on two sides of a corresponding tunnel (1), wherein each uplift pile group comprises a plurality of uplift piles (2) arranged at intervals along the extending direction of the tunnel (1); the uplift pile structure is characterized by also comprising a crown beam (5) which connects the uplift piles (2) in the same uplift pile group in series into a whole, wherein the crown beam (5) is arranged at the pile top position of each uplift pile (2); the anti-floating roof structure further comprises anti-floating plates (6) and partition wall supporting structures, wherein the anti-floating plates (6) are laid on the tops of the crown beams (5); the partition wall supporting structure is used for supporting a wall body to be excavated in the excavation process of the foundation pit.
2. The excavation enclosure structure for excavation of the foundation pit above the tunnel according to claim 1, wherein: the uplift pile (2) comprises a hollow pipe and filling materials filled in the hollow pipe.
3. The excavation enclosure structure for excavation of the foundation pit above the tunnel according to claim 2, wherein: the hollow pipe is arranged in a split mode and comprises a plurality of hollow pipe sections (201) which are sequentially spliced and fixed.
4. The excavation enclosure structure for excavation of the foundation pit above the tunnel according to claim 1, wherein: and a plurality of joint locking notches (502) which correspond to the uplift piles (2) in the same uplift pile group one by one are arranged in the crown beam (5), and the joint locking notches (502) are used for inserting the top ends of the uplift piles (2).
5. The excavation enclosure structure for excavation of the foundation pit above the tunnel according to claim 4, wherein: the crown beams (5) are arranged in a split mode, each crown beam (5) comprises a plurality of crown beam plates (501) used for splicing and assembling, and the crown beam plates (501) are fixedly connected through connecting pieces (503).
6. The excavation enclosure structure for excavation of the foundation pit above the tunnel according to claim 5, wherein: the joint locking notch (502) is formed by splicing two adjacent crown beam plates (501), and a groove structure used for splicing the joint locking notch (502) is arranged on the corresponding crown beam plate (501).
7. The excavation enclosure structure for excavation of the foundation pit above the tunnel according to claim 5, wherein: the connecting piece (503) is a bolt.
8. The excavation enclosure structure for excavation of the foundation pit above the tunnel according to claim 1, wherein: partition wall supporting construction is including strutting partition wall (8) and stock (7), be provided with a plurality of slotted holes that supply stock (7) to penetrate on strutting partition wall (8).
9. The excavation enclosure structure for excavation of the foundation pit above the tunnel according to claim 1, wherein: the device also comprises a net hanging and concrete spraying structure paved on the slope surface of the excavated foundation pit.
10. The excavation enclosure structure for excavation of the foundation pit above the tunnel according to claim 1, wherein: the anti-floating plate (6) is fixedly connected with each anti-pulling pile (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921730531.0U CN211006688U (en) | 2019-10-15 | 2019-10-15 | Excavation enclosure structure for excavation of foundation pit above tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921730531.0U CN211006688U (en) | 2019-10-15 | 2019-10-15 | Excavation enclosure structure for excavation of foundation pit above tunnel |
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| Publication Number | Publication Date |
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| CN211006688U true CN211006688U (en) | 2020-07-14 |
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| CN201921730531.0U Active CN211006688U (en) | 2019-10-15 | 2019-10-15 | Excavation enclosure structure for excavation of foundation pit above tunnel |
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| CN (1) | CN211006688U (en) |
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