CN212772385U - Railway deep foundation pit anchor rope supporting construction - Google Patents
Railway deep foundation pit anchor rope supporting construction Download PDFInfo
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- CN212772385U CN212772385U CN202021363106.5U CN202021363106U CN212772385U CN 212772385 U CN212772385 U CN 212772385U CN 202021363106 U CN202021363106 U CN 202021363106U CN 212772385 U CN212772385 U CN 212772385U
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Abstract
The utility model discloses a railway deep basal pit anchor rope supporting construction, including strutting spouting face and slip casting passageway, slip casting passageway slope set up in strut and spout face one side, the slip casting passageway is a cavity tubular structure, just the slip casting passageway outside is encircleed and is provided with multiunit steel strand wires, just steel strand wires with the slip casting passageway is parallel to each other, strut and spout the face and keep away from slip casting passageway one side is provided with the tensioning the waist rail of steel strand wires. Has the advantages that: the utility model discloses a set up steel strand wires in the slip casting passageway outside and carry out the tractive and support to strut foundation ditch work progress through prestressed anchorage cable supporting construction, improve foundation ditch supporting construction intensity and stability, shorten construction cycle, and avoid causing the influence to railway track regional soil layer intensity, the guarantee foundation ditch faces side railway normal operating, and the practicality is strong.
Description
Technical Field
The utility model relates to a excavation supporting field, concretely relates to railway deep basal pit anchor rope supporting construction.
Background
With the development of social economy and the acceleration of urbanization process, high-rise, railway transportation, large underground public facilities and the like grow up rapidly, a large number of deep foundation pit projects and underground projects are developed, the building spacing is smaller and smaller, the construction safety and the project progress of foundation pit excavation are directly influenced by the selection of the foundation pit supporting mode, and the foundation pit supporting mode close to the railway is one of projects with higher construction technical requirements at present.
The applicant finds that at least the following technical problems exist in the prior art: at present near railway side pit and strut and adopt row pile structure usually, adopt one row of high pressure jet grouting pile to construct to the pile bolck as the stagnant water curtain outside, all the other positions adopt the high-pressure injection slip casting method to consolidate, and construction cycle is longer, and need excavate the bored concrete pile hole, has certain safe risk to guarantee railway normal operating, and the practicality is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a railway deep basal pit anchor rope supporting construction in order to solve above-mentioned problem, carry out the tractive through setting up steel strand wires in the slip casting passageway outside and support to strut the foundation ditch work progress through prestressed anchorage cable supporting construction, improve excavation supporting structure intensity and stability, shorten construction cycle, and avoid causing the influence to the regional soil layer intensity of railway track, the guarantee foundation ditch faces side railway normal operating, and the practicality is strong, sees the explanation below in detail.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a railway deep basal pit anchor rope supporting construction, including supporting the spouting face and slip casting passageway, the slope of slip casting passageway sets up in supporting spouting face one side, the slip casting passageway is a hollow tubular structure, and the slip casting passageway outside encircles and is provided with the multiunit steel strand wires, and the steel strand wires with the slip casting passageway is parallel to each other, the supporting spouting face is kept away from slip casting passageway one side is provided with the waist rail of straining the steel strand wires;
the inner sides of the multiple groups of steel strands are provided with centering supports for supporting the grouting channel, one ends, far away from the support spraying surface, of the steel strands are provided with guide heads, the guide heads are of a hemispherical structure, and the inner sides of the guide heads are flush with the end part of the grouting channel.
By adopting the anchor cable supporting structure for the railway deep foundation pit, when the foundation pit needs to be supported, an anchor cable hole is drilled in a supporting area, then the grouting channel and the steel strand are synchronously arranged in the anchor cable hole, the first grouting pipe is connected with external grouting equipment to perform a grouting process, the first grouting pipe is gradually pulled out until the first grouting pipe moves to the supporting spray surface position along with the grouting of cement in the first grouting pipe, and when the cement slurry in the grouting channel flows back to the supporting spray surface position, one grouting is finished; and (3) carrying out secondary grouting 4-6 hours after the primary grouting process is finished, connecting the first grouting pipe with external grouting equipment, pulling the second grouting pipe outwards while grouting, plugging an orifice formed after the grouting channel is drawn out by using wet clay when grout flows out to the position of the supporting sprayed surface, finishing the grouting process, installing a steel waist beam on one side of the steel strand extending out of the supporting sprayed surface, and tensioning the steel strand by using the bracket outside the waist beam to realize the supporting process of the anchor cable of the foundation pit.
Preferably, the grouting channel penetrates through the supporting and spraying surface along the extension direction of the steel strand, and the grouting channel is in clearance fit with the supporting and spraying surface.
Preferably, the grouting channel comprises a first grouting pipe and a second grouting pipe, the first grouting pipe and the second grouting pipe are parallel to each other, and both the first grouting pipe and the second grouting pipe penetrate through the middle of the centering bracket.
Preferably, the centering bracket is a disc-shaped structure, 6 sets of U-shaped limiting grooves are arranged around the outer side of the centering bracket, the number of the steel strands is 3, and 3 sets of the steel strands are distributed in 6 sets of the limiting grooves at intervals.
Preferably, the steel strand is a steel stay wire formed by twisting and winding a plurality of steel cables, a bracket is arranged on one side of the waist beam, which is far away from the supporting and spraying surface, and the end part of the steel strand penetrates through the center of the waist beam and is connected with the bracket through an anchorage device.
Preferably, the outer side of the steel strand, far away from the waist rail, of the supporting spraying surface is sleeved with a sleeve, and a gap between the sleeve and the steel strand is filled with grease in a lubricating manner.
Has the advantages that: the utility model discloses a set up steel strand wires in the slip casting passageway outside and carry out the tractive and support to strut foundation ditch work progress through prestressed anchorage cable supporting construction, improve foundation ditch supporting construction intensity and stability, shorten construction cycle, and avoid causing the influence to railway track regional soil layer intensity, the guarantee foundation ditch faces side railway normal operating, and the practicality is strong.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a front view structural diagram of the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
fig. 3 is a structural view of an end face of the centering bracket of the present invention.
The reference numerals are explained below:
1. supporting the spraying surface; 2. steel strand wires; 201. a steel cord; 3. a wale; 4. grouting a channel; 401. a first grouting pipe; 402. a second grouting pipe; 5. a centering support; 501. a limiting groove; 502. a through hole; 6. a guide head; 7. a sleeve; 8. a bracket; 801. an anchorage device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-3 show, the utility model provides a railway deep basal pit anchor rope supporting construction, including strutting whitewashed face 1 and slip casting passageway 4, 4 slopes of slip casting passageway set up in strutting whitewashed face 1 one side, and slip casting passageway 4 is a hollow tubular structure, and the 4 outsides of slip casting passageway encircle and be provided with multiunit steel strand wires 2, and steel strand wires 2 and slip casting passageway 4 are parallel to each other, strut whitewashed face 1 and keep away from slip casting passageway 4 one side and be provided with the waist rail 3 of taut steel strand wires 2.
The inner sides of the multiple groups of steel strands 2 are provided with centering supports 5 for supporting grouting channels 4, one ends, far away from the supporting spraying surfaces 1, of the steel strands 2 are provided with guide heads 6, the guide heads 6 are of a hemispherical structure, the inner sides of the guide heads 6 are flush with the end portions of the grouting channels 4, so that the steel strands 2 are supported by the guide heads 6 and the grouting channels 4 move into supporting holes in foundation pit positions, the grouting channels 4 penetrate through the supporting spraying surfaces 1 along the extending direction of the steel strands 2, the grouting channels 4 are in clearance fit with the supporting spraying surfaces 1, the grouting channels 4 comprise first grouting pipes 401 and second grouting pipes 402, the first grouting pipes 401 and the second grouting pipes 402 are parallel to each other, the first grouting pipes 401 and the second grouting pipes 402 penetrate through the middle portions of the centering supports 5, and grouting is performed in sequence on holes of the foundation pits through the two grouting pipes of the grouting channels 4, and two grouting processes are achieved.
As optional implementation mode, well support 5 is a discoid structure, should well support 5 outside ring set up 6 groups of U-shaped spacing grooves 501, 2 quantity of steel strand wires are 3 groups, and 3 group's 2 interval distributions of steel strand wires are in 6 groups of spacing grooves 501, steel strand wires 2 are the steel stay wire that many cable wires 201 transposition winding were made, wale 3 is kept away from to strut and is spouted 1 one side and be provided with bracket 8, 2 tip of steel strand wires pass the centre of wale 3 and meet through ground tackle 801 with bracket 8, strut and spout 2 outsides of steel strand wires 2 that face 1 keeps away from wale 3 one side and cup jointed sleeve 7, sleeve 7 and 2 clearances of steel strand wires pass through grease lubrication and fill, in order to improve the unobstructed convenience that steel strand wires 2 removed in sleeve 7.
By adopting the structure, when a foundation pit needs to be supported, an anchor cable hole is drilled in a supporting area, then the grouting channel 4 and the steel strand 2 are synchronously arranged in the anchor cable hole, the first grouting pipe 401 is connected with external grouting equipment to carry out a primary grouting process, the first grouting pipe 401 is gradually pulled out until the first grouting pipe moves to the position of the supporting spray surface 1 along with the grouting of the cement slurry in the first grouting pipe 401, and when the cement slurry in the grouting channel 4 flows back to the position of the supporting spray surface 1, primary grouting is finished; after the primary grouting process is finished, carrying out a secondary grouting process 4-6 hours later, connecting a first grouting pipe 401 with external grouting equipment, pulling a second grouting pipe 402 outwards while grouting, plugging an orifice formed after a grouting channel 4 is drawn out by using wet clay when grout flows out to the position of a supporting spray surface 1, finishing the grouting process, then installing a steel waist beam 3 on one side of a steel strand 2 extending out of the supporting spray surface 1, and tensioning the steel strand 2 through a bracket 8 on the outer side of the waist beam 3 to realize the anchor cable supporting process of the foundation pit;
set up steel strand wires 2 and carry out the tractive support through 4 outsides in slip casting passageways to strut the foundation ditch work progress through prestressed anchorage cable supporting construction, improve foundation ditch supporting construction strength and stability, shorten construction cycle, and avoid causing the influence to the regional soil layer intensity of railway track, ensure that the foundation ditch faces side railway normal operating, the practicality is strong.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a railway deep basal pit anchor rope supporting construction which characterized in that: the concrete grouting device comprises a supporting spraying surface (1) and a grouting channel (4), wherein the grouting channel (4) is obliquely arranged on one side of the supporting spraying surface (1), the grouting channel (4) is of a hollow tubular structure, a plurality of groups of steel strands (2) are arranged on the outer side of the grouting channel (4) in a surrounding mode, the steel strands (2) are parallel to the grouting channel (4), and a waist beam (3) for tensioning the steel strands (2) is arranged on one side, away from the grouting channel (4), of the supporting spraying surface (1);
the multi-group steel strand (2) inboard is provided with the support well centering support (5) of slip casting passageway (4), just steel strand (2) are kept away from it is provided with direction head (6) to strut face (1) one end, direction head (6) are half spherical structure, just direction head (6) inboard with slip casting passageway (4) tip parallel and level.
2. The anchor cable support structure for the railway deep foundation pit as claimed in claim 1, wherein: the grouting channel (4) penetrates through the supporting spraying surface (1) along the extending direction of the steel strand (2), and the grouting channel (4) is in clearance fit with the supporting spraying surface (1).
3. The anchor cable support structure for the railway deep foundation pit as claimed in claim 1, wherein: the grouting channel (4) comprises a first grouting pipe (401) and a second grouting pipe (402), the first grouting pipe (401) and the second grouting pipe (402) are parallel to each other, and the first grouting pipe (401) and the second grouting pipe (402) penetrate through the middle of the centering bracket (5).
4. The anchor cable support structure for the railway deep foundation pit as claimed in claim 1, wherein: the centering support (5) is of a disc-shaped structure, 6 groups of U-shaped limiting grooves (501) are arranged on the outer side of the centering support (5) in a surrounding mode, the number of the steel strands (2) is 3, and 3 groups of the steel strands (2) are distributed in 6 groups of the limiting grooves (501) at intervals.
5. The anchor cable support structure for the railway deep foundation pit as claimed in claim 1, wherein: the steel strand wires (2) are steel stay wires formed by twisting and winding a plurality of steel cables (201), a bracket (8) is arranged on one side, away from the support spraying surface (1), of the waist beam (3), and the end parts of the steel strand wires (2) penetrate through the center of the waist beam (3) and are connected with the bracket (8) through an anchorage device (801).
6. The anchor cable support structure for the railway deep foundation pit as claimed in claim 1, wherein: the support spraying surface (1) is far away from one side of the waist beam (3), a sleeve (7) is sleeved on the outer side of the steel strand (2), and the gap between the sleeve (7) and the steel strand (2) is filled through grease lubrication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021363106.5U CN212772385U (en) | 2020-07-13 | 2020-07-13 | Railway deep foundation pit anchor rope supporting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021363106.5U CN212772385U (en) | 2020-07-13 | 2020-07-13 | Railway deep foundation pit anchor rope supporting construction |
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| CN212772385U true CN212772385U (en) | 2021-03-23 |
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| CN202021363106.5U Active CN212772385U (en) | 2020-07-13 | 2020-07-13 | Railway deep foundation pit anchor rope supporting construction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114908757A (en) * | 2022-05-20 | 2022-08-16 | 中建八局第二建设有限公司 | Grouting construction method for anchor cable of deep foundation pit |
| CN115182360A (en) * | 2022-08-04 | 2022-10-14 | 中建八局第二建设有限公司 | Pile anchor waist beam supporting structure and supporting method |
-
2020
- 2020-07-13 CN CN202021363106.5U patent/CN212772385U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114908757A (en) * | 2022-05-20 | 2022-08-16 | 中建八局第二建设有限公司 | Grouting construction method for anchor cable of deep foundation pit |
| CN115182360A (en) * | 2022-08-04 | 2022-10-14 | 中建八局第二建设有限公司 | Pile anchor waist beam supporting structure and supporting method |
| CN115182360B (en) * | 2022-08-04 | 2023-08-18 | 中建八局第二建设有限公司 | Pile anchor waist beam supporting structure and supporting method |
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