CN211571686U - Underground continuous wall structure at inner corner of underground excavation engineering - Google Patents
Underground continuous wall structure at inner corner of underground excavation engineering Download PDFInfo
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- CN211571686U CN211571686U CN201922289577.XU CN201922289577U CN211571686U CN 211571686 U CN211571686 U CN 211571686U CN 201922289577 U CN201922289577 U CN 201922289577U CN 211571686 U CN211571686 U CN 211571686U
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Abstract
The utility model discloses an underground continuous wall structure at an inner corner of underground excavation engineering, which comprises a transverse underground continuous wall implemented in an underground excavation engineering tunnel and a longitudinal underground continuous wall with equal depth, wherein the underground continuous wall is connected at a corner to form an underground continuous wall structure at an L-shaped corner; the side surface of the end part of the transverse underground continuous wall is provided with a vertical through groove corresponding to the position of the longitudinal underground continuous wall, the end part of the longitudinal underground continuous wall is provided with a tenon joint which is inserted into the groove opening of the groove and is integrally connected after concrete is poured, and the tenon joint is provided with a convex shoulder extending towards two sides and is integrally connected with the side surface of the transverse underground continuous wall. The utility model discloses corner joint simple structure, precision height, connect reliable, the stagnant water is effectual, construction convenience, the effectual construction period that has shortened.
Description
Technical Field
The utility model belongs to the technical field of tunnel inner corner department underground continuous wall construction, specifically a secretly dig engineering inner corner department underground continuous wall structure.
Background
At present, when large-scale underground municipal works such as subway stations and the like are built in urban built-up areas with good geological conditions, shallow-buried underground excavation is often adopted for construction. The shallow-buried underground excavation construction method needs no water environment, the construction method mainly adopts a precipitation method in the past, and pumped underground water is discharged into a municipal pipe network, which wastes underground water resources and municipal drainage facilities. The underground continuous wall is a common water stop form for foundation pit engineering, has the characteristics of mature technology and reliable quality, can realize non-precipitation construction by combining the underground continuous wall with shallow-buried underground excavation engineering, and is very favorable for protecting underground water. However, the construction method is limited by narrow operation space in the tunnel, the construction flexibility of the underground continuous wall in the tunnel is poor, at present, only a linear wall body can be constructed, collapse is easily caused by overlarge grooving area of an underground deep groove of the underground continuous wall, the potential safety hazard is high, for the corner connecting part of the underground continuous wall, the existing joint form (I-shaped steel, a locking pipe, a locking box and the like) cannot well realize reliable connection of two vertical underground continuous walls, the connection precision is low, the leakage phenomenon is serious, water flow erosion at the corner of the wall body is serious, and the problem that the technical application of the underground continuous wall in the tunnel is restricted becomes difficult and needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model provides an underground excavation engineering inner corner department underground continuous wall structure, its aim at have solved the current underground continuous wall and have dug the problem that collapse, underground continuous wall corner attach fitting are unreliable, the seepage is serious, connection accuracy is low that deep groove arouses greatly.
The utility model adopts the following technical scheme:
an underground diaphragm wall structure at an inner corner of an underground excavation engineering comprises a transverse underground diaphragm wall implemented in an underground excavation engineering tunnel and longitudinal underground diaphragm walls with equal depth, wherein the underground diaphragm walls are connected at corners to form an underground diaphragm wall structure at an L-shaped corner; the side surface of the end part of the transverse underground continuous wall is provided with a vertical through groove corresponding to the position of the longitudinal underground continuous wall, the end part of the longitudinal underground continuous wall is provided with a tenon joint which is inserted into the groove opening of the groove and is integrally connected after concrete is poured, and the tenon joint is provided with a convex shoulder extending towards two sides and is integrally connected with the side surface of the transverse underground continuous wall.
A transverse reinforcement cage is arranged in the transverse underground continuous wall, and a longitudinal reinforcement cage is arranged in the longitudinal underground continuous wall; the horizontal steel reinforcement cage on imbed the welding trapezoidal channel-section steel, the welding trapezoidal channel-section steel constitute by curb plate and web welding, horizontal steel reinforcement cage pour behind the concrete by the welding trapezoidal channel-section steel constitutes vertical the recess that link up.
The transverse reinforcement cage comprises horizontal reinforcements, horizontal additional reinforcements, vertical main reinforcements and the welded trapezoidal channel steel; the horizontal steel bars are horizontally bent inwards along the two sides of the side plate at the welding trapezoidal channel steel and are welded with the horizontal additional steel bars in the same number at the intersection points; the outside of the side plate of the welding trapezoidal channel steel is welded with the horizontal steel bar, and the outside of the web plate of the welding trapezoidal channel steel is welded with the horizontal additional steel bar.
The transverse reinforcement cage is vertically assembled in a segmented mode, the segmented height ranges from 3m to 5m, the vertical main reinforcements are connected and lengthened through a reinforcement mechanical connecting sleeve, and the welded trapezoidal channel steel is welded or bolted on the inner side of the web plate through a connecting steel plate.
The end part of the side wall of the welding trapezoidal channel steel is provided with a winding-flow-preventing iron sheet which extends to two sides, the winding-flow-preventing iron sheet is equal to the welding trapezoidal channel steel in vertical height and is fixed on the inner surface of the end part of the side plate of the welding trapezoidal channel steel through a bolt.
And the upper end of the longitudinal reinforcement cage is gradually retracted in the transverse reinforcement corresponding to the groove to form the tenon joint corresponding to the groove, and concrete is poured into the groove for integral connection.
The utility model has the advantages as follows:
the utility model discloses in time execute behind the segmentation excavation underground continuous wall deep trouth and do underground continuous wall and fill the excavation region, can avoid concreting the phenomenon that flows around to appear, the collapse that large tracts of land excavation arouses can not appear, and is high in safety, the utility model discloses corner joint design can realize two underground continuous wall reliable connections of tunnel corner, through horizontal continuous wall steel reinforcement cage, vertical continuous wall steel reinforcement cage constitution L shape steel reinforcement cage and connect through reserving welding trapezoidal channel-section steel, the articulate form is simple, the precision is high, construction convenience, the effectual construction period that has shortened, adopt welding trapezoidal groove steel joint, prevent that the iron sheet form that flows around has increased the stagnant water route, the stagnant water is effectual, effectively prevents wall corner department seepage and rivers erosion phenomenon.
Description of the drawings:
fig. 1 is the structural schematic diagram of the section of the underground diaphragm wall of the utility model.
Fig. 2 is the schematic view of the steel bar cage of the present invention.
Figure 3 is the utility model discloses welding dovetail groove steel construction schematic diagram.
Fig. 4 is the first vertical extension schematic diagram of channel steel of the utility model.
Fig. 5 is the second vertical extension schematic diagram of the channel steel of the utility model.
Reference numerals:
1-transverse underground continuous wall, 2-longitudinal underground continuous wall, 3-groove, 4-tenon joint, 5-transverse reinforcement cage, 5.1-horizontal reinforcement, 5.2-horizontal additional reinforcement, 5.3-vertical main reinforcement, 6-longitudinal reinforcement cage, 7-welding trapezoidal channel steel, 7.1-side plate, 7.2-web plate, 8-connecting steel plate, 9-anti-streaming iron sheet, 10-grouting pipe
The specific implementation mode is as follows:
the following describes the embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, 2, 3, 4, 5, an underground diaphragm wall structure at an inner corner of an underground excavation project comprises a transverse underground diaphragm wall 1 implemented in an underground excavation project tunnel and a longitudinal underground diaphragm wall 2 with equal depth, wherein the underground diaphragm walls are connected at the corners to form an underground diaphragm wall structure at an L-shaped corner; the side face of the end part of the transverse underground continuous wall 1 is provided with a vertical through groove 3 corresponding to the position of the longitudinal underground continuous wall 2, the end part of the longitudinal underground continuous wall 2 is provided with a tenon joint 4, the tenon joint 4 is inserted into the notch of the groove 3 and is integrally connected after concrete is poured, and the tenon joint 4 is provided with a convex shoulder extending towards two sides and is integrally connected with the side face of the transverse underground continuous wall 1.
A transverse reinforcement cage 5 is arranged in the transverse underground continuous wall 1, and a longitudinal reinforcement cage 6 is arranged in the longitudinal underground continuous wall 2; horizontal steel reinforcement cage 5 on imbed welding trapezoidal channel-section steel 7, welding trapezoidal channel-section steel 7 constitute by curb plate 7.1 and web 7.2 welding, horizontal steel reinforcement cage 5 pour behind the concrete by welding trapezoidal channel-section steel 7 constitutes vertical link up recess 3, see figure 2.
The transverse reinforcement cage 5 comprises horizontal reinforcements 5.1, horizontal additional reinforcements 5.2, vertical main reinforcements 5.3 and the welded trapezoidal channel steel 7; the horizontal steel bars 5.1 are horizontally bent inwards along two sides of the side plate 7.1 at the welding trapezoidal channel steel 7 and are welded with the horizontal additional steel bars 5.2 with the same number at the intersection points; the outside of a side plate 7.1 of the welding trapezoidal channel steel 7 is welded with the horizontal reinforcing steel bar 5.1, and the outside of a web plate 7.2 of the welding trapezoidal channel steel 7 is welded with the horizontal additional reinforcing steel bar 5.2, see the attached drawing 2.
The transverse reinforcement cage 5 is vertically assembled in a segmented mode, the segmented height is 3 m-5 m, the vertical main reinforcement 5.3 is connected and lengthened through a reinforcement mechanical connecting sleeve, and the welded trapezoidal channel steel 7 is connected and lengthened through a connecting steel plate 8 on the inner side of a web 7.2 or through bolts, and the attached drawings are shown in figures 2, 3, 4 and 5.
The end part of the side wall of the welded trapezoidal channel steel 7 is provided with a winding-proof iron sheet 9 which extends towards two sides, the winding-proof iron sheet 9 is vertically equal to the welded trapezoidal channel steel 7 in height, and is fixed on the inner surface of the end part of the side plate 7.1 of the welded trapezoidal channel steel 7 through bolts, which is shown in the attached drawing 2.
The transverse steel bars at the upper end of the longitudinal steel reinforcement cage 6 corresponding to the groove 3 are gradually retracted to form the tenon joint 4 corresponding to the groove 3, and concrete is poured into the groove 3 for integral connection, which is shown in the attached drawing 2.
As shown in fig. 1, 2, 3, 4 and 5, a construction method of an underground diaphragm wall structure at an inner corner of an underground excavation project comprises the following construction steps,
firstly, manufacturing a transverse reinforcement cage 5, horizontally bending a horizontal reinforcement 5.1 to the inner side at a corner joint, welding and fixing a vertical reinforcement groove with a vertically through trapezoidal section at an intersection point with the same number of horizontal additional reinforcements 5.2 in the transverse reinforcement cage 5, embedding a welded trapezoidal channel steel 7 into the vertical reinforcement groove, and respectively welding and fixing the welded trapezoidal channel steel 7 and the horizontal reinforcement 5.1 and the horizontal additional reinforcement 5.2 in the vertical reinforcement groove; an anti-streaming iron sheet 9 is arranged at the end part of the side wall of the welded trapezoidal channel steel 7 and extends towards two sides, and the anti-streaming iron sheet 9 is fixed on the inner surface of the end part of a side plate 7.1 of the welded trapezoidal channel steel 7 through bolts, which is shown in an attached drawing 2;
step two, implementing a transverse underground diaphragm wall slot in an underground excavation engineering tunnel, sectionally placing a plurality of transverse reinforcement cages 5 in the slot, wherein the sectional height is 3-5 m, the top of each section of transverse reinforcement cage 5 is placed to the position of a notch, and then is connected with the next section of reinforcement cage, namely, the vertical main reinforcement 5.3 is connected and lengthened through a reinforcement mechanical connecting sleeve, and the welded trapezoidal channel steel 7 is welded or bolted and lengthened through a connecting steel plate 8 at the inner side of a web 7.2 until the welded trapezoidal channel steel is flush with the notch of the transverse underground diaphragm wall, which is shown in the attached figures 2, 3, 4 and 5;
step three, pouring concrete in the transverse underground continuous wall groove and the transverse reinforcement cage 5 to form a transverse underground continuous wall 1 with a through groove which is vertically communicated, and referring to the attached drawing 1;
step four, manufacturing a longitudinal reinforcement cage; the transverse steel bars at the upper end of the longitudinal steel bar cage 6 corresponding to the groove 3 are gradually contracted inwards to form the tenon joint 4 corresponding to the groove 3, and the tenon joint 4 is shown in the attached drawing 2;
fifthly, implementing a longitudinal underground continuous wall groove with the same depth as the transverse underground continuous wall 1 in the underground excavation engineering tunnel, and lowering a longitudinal reinforcement cage 6 to the groove in sections until the longitudinal underground excavation deep groove mouth is flush; the sectional height is 3 m-5 m, and the top of each section of the longitudinal reinforcement cage 6 is placed to the position of the notch and then connected with the next section of reinforcement cage, namely the vertical main reinforcement 5.3 is connected and lengthened through a reinforcement mechanical connecting sleeve; the tenon joint 4 is embedded into the groove 3, see fig. 2;
and sixthly, pouring concrete into the longitudinal underground continuous wall groove and the longitudinal reinforcement cage 6 to form the longitudinal underground continuous wall 2, so that the transverse underground continuous wall 1 and the longitudinal underground continuous wall 2 are connected to form the underground continuous wall at the inner corner of the underground excavation project, and referring to the attached drawing 1.
In the fifth step, when the longitudinal reinforcement cage 6 is lowered, a reserved grouting pipe 10 is lowered along the inner side wall of the groove 3, a grouting hole is reserved in the side wall of the grouting pipe 10, and the grouting pipe 10 is lengthened by adopting a screw thread sleeve; in the sixth step, after the longitudinal underground continuous wall 2 is poured, the poured gap is filled by grouting through the grouting pipe 10, see fig. 1.
Claims (6)
1. The utility model provides an underground diaphragm wall structure of undercut engineering inner corner department which characterized in that: the underground continuous wall structure comprises a transverse underground continuous wall (1) implemented in an underground excavation engineering tunnel and longitudinal underground continuous walls (2) with equal depth, wherein the underground continuous walls are connected at corners to form an L-shaped corner underground continuous wall structure; the side face of the end part of the transverse underground continuous wall (1) is provided with a vertical through groove (3) corresponding to the position of the longitudinal underground continuous wall (2), the end part of the longitudinal underground continuous wall (2) is provided with a tenon joint (4), the tenon joint is inserted into a notch of the groove (3) and is integrally connected after concrete is poured, and the tenon joint (4) is provided with a convex shoulder extending towards two sides and is integrally connected with the side face of the transverse underground continuous wall (1).
2. The underground continuous wall structure at the inner corner of the underground excavation engineering of claim 1, wherein: a transverse reinforcement cage (5) is arranged in the transverse underground continuous wall (1), and a longitudinal reinforcement cage (6) is arranged in the longitudinal underground continuous wall (2); horizontal steel reinforcement cage (5) on imbed welding trapezoidal channel-section steel (7), welding trapezoidal channel-section steel (7) constitute by curb plate (7.1) and web (7.2) welding, horizontal steel reinforcement cage (5) pour behind the concrete by welding trapezoidal channel-section steel (7) constitute vertical link up recess (3).
3. The underground continuous wall structure at the inner corner of the underground excavation engineering of claim 2, wherein: the transverse reinforcement cage (5) comprises horizontal reinforcements (5.1), horizontal additional reinforcements (5.2), vertical main reinforcements (5.3) and the welded trapezoidal channel steel (7); the horizontal steel bars (5.1) are horizontally bent inwards along two sides of the side plate (7.1) at the welding trapezoidal channel steel (7) and are welded with the horizontal additional steel bars (5.2) with the same quantity at intersection points; the utility model discloses a welding ladder-shaped channel-section steel (7) curb plate (7.1) outside with horizontal reinforcing bar (5.1) welding, welding ladder-shaped channel-section steel (7) the web (7.2) outside with horizontal additional reinforcing bar (5.2) welding.
4. The underground continuous wall structure at the inner corner of the underground excavation project as claimed in claim 3, wherein: the transverse reinforcement cage (5) is vertically assembled in a segmented mode, the segmented height is 3 m-5 m, the vertical main reinforcement (5.3) is connected and lengthened through a reinforcement mechanical connecting sleeve, and the welding trapezoidal channel steel (7) is connected and lengthened through the inner side of the web plate (7.2) through a connecting steel plate (8) in a welding mode or a bolt connection mode.
5. The underground continuous wall structure at the inner corner of the underground excavation engineering of claim 2, wherein: the end part of the side wall of the welding trapezoidal channel steel (7) is provided with a bypass-flow-preventing iron sheet (9) which extends to two sides, the bypass-flow-preventing iron sheet (9) is vertically equal to the welding trapezoidal channel steel (7) in height, and the bypass-flow-preventing iron sheet is fixed on the inner surface of the end part of the side plate (7.1) of the welding trapezoidal channel steel (7) through a bolt.
6. The underground continuous wall structure at the inner corner of the underground excavation engineering of claim 2, wherein: the upper end of the longitudinal reinforcement cage (6) is gradually retracted in the transverse reinforcement corresponding to the groove (3) to form the tenon joint (4) corresponding to the groove (3), and concrete is poured into the groove (3) for integral connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922289577.XU CN211571686U (en) | 2019-12-18 | 2019-12-18 | Underground continuous wall structure at inner corner of underground excavation engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922289577.XU CN211571686U (en) | 2019-12-18 | 2019-12-18 | Underground continuous wall structure at inner corner of underground excavation engineering |
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| Publication Number | Publication Date |
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| CN211571686U true CN211571686U (en) | 2020-09-25 |
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| CN201922289577.XU Active CN211571686U (en) | 2019-12-18 | 2019-12-18 | Underground continuous wall structure at inner corner of underground excavation engineering |
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