CN218844318U

CN218844318U - Reinforcing structure of shield underpass risk source

Info

Publication number: CN218844318U
Application number: CN202222443092.3U
Authority: CN
Inventors: 李长明; 李晋; 王赛; 姜万里; 张景武; 郝志成; 周清海; 张兆坤
Original assignee: Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Current assignee: Rail Transit Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2023-04-11
Anticipated expiration: 2032-09-15

Abstract

The utility model discloses a shield constructs reinforced structure who wears risk source down, through take the risk source structure ground to set up slip casting pipe slip casting formation pressure-bearing plate area and consolidate and through strengthening the section of jurisdiction (to in the risk source structure influence range) and the radial deep hole slip casting of shield structure formation interval stagnant water hoop that sets up, optimize shield structure machine simultaneously and dig into the parameter, make ground subside, the structure warp the quality of subsiding, shaping tunnel obtain effective control. The utility model provides a when wearing the risk source under the new shield structure, current ground reinforcement construction can not be better stabilize the risk source, has the problem of great safety risk.

Description

Reinforcing structure of shield underpass risk source

Technical Field

The utility model relates to a shield constructs construction technical field, concretely relates to reinforced structure who wears risk source under shield constructs.

Background

When a new shield is used for downwards crossing the risk sources such as railways, high-speed bridges, high-pressure gas and the like on the large-scale urban operation line, the downwards crossing risk sources are generally reinforced on the ground, and after the ground is reinforced, the core is drilled to check the reinforcing effect, so that the shield can pass through the risk sources after meeting the requirements.

The existing ground reinforcing construction method has the following problems: after the shield machine downwards penetrates through the gas pipe, grouting is needed to fill an excavation gap (grouting mortar solidification volume shrinkage and grouting amount are insufficient) and underground water drives the soil to run off after shield excavation due to disturbance of the shield machine on the soil, so that the gas pipe sinks, and a pipeline is broken in serious conditions, thereby causing serious safety accidents and severe social influences.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the reinforcing structure for the shield underpass risk source is provided so as to solve the problem that the existing ground reinforcing construction cannot better stabilize the risk source and has larger safety risk when the new shield underpass the risk source.

In order to achieve the above object, a reinforcing structure for a shield tunneling machine to penetrate a risk source is provided, which comprises:

the shield underpass section is arranged below a risk source structure and comprises a midspan pipe section and side span pipe sections, wherein two ends of the midspan pipe section are respectively connected with the side span pipe sections, the side span pipe sections at two ends of the midspan pipe section are respectively arranged right below two opposite sides of the risk source structure, the midspan pipe section comprises a plurality of standard pipe sheets which are spliced together, the side span pipe section comprises a plurality of reinforcing pipe sheets which are spliced together, the diameter of a main rib of each reinforcing pipe sheet is larger than that of a main rib of each standard pipe sheet, and the number of grouting holes of each reinforcing pipe sheet is more than that of the grouting holes of each standard pipe sheet;

the first slurry is subjected to deep hole grouting along the radial direction of the shield through a grouting hole of the shield downward-penetrating section to form the water stop hoop wrapping a ring of pipe pieces of the shield downward-penetrating section, and the water stop hoops are arranged at intervals along the length direction of the shield downward-penetrating section;

and the second slurry is grouted between the risk source structure and the shield through the ground to form the pressure-bearing plate strip in a consolidation mode.

Further, the number of the grouting holes of the reinforcing duct piece is sixteen.

Furthermore, a plurality of the water stop hoops are arranged by spacing two ring pipe pieces.

Further, the first slurry comprises cement slurry and water glass.

Further, the second slurry is cement slurry.

Further, the side span segment includes three rings of the reinforcement segments.

The beneficial effects of the utility model reside in that, the utility model discloses a reinforced structure who wears risk source under the shield constructs forms the pressure-bearing plate area through taking ground to set up slip casting pipe slip casting to risk source structures and consolidates and through strengthening the section of jurisdiction (to in the risk source structures influence range) and the radial deep hole slip casting of shield structure and forming the stagnant water hoop that the interval set up, optimizes the shield simultaneously and constructs the machine and drive the parameter, makes ground subside, structures warp and subside, the quality in shaping tunnel obtains effective control.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is the utility model discloses the shield constructs the structure sketch map of the reinforced structure who wears the risk source down.

Fig. 2 is a schematic structural diagram of the end of the shield underpass section in the embodiment of the present invention.

Fig. 3 is a cross-sectional view of the end of the shield underpass section of the embodiment of the present invention.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not to be construed as limiting the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 3, the utility model provides a reinforcing structure of wearing risk source under shield constructs, include: the shield structure is down worn section 1, a plurality of stagnant water hoop 2 and pressure-bearing plate area 3.

The shield underpass section 1 is arranged below the risk source structure 4. In this embodiment, the risk source structure is a gas pipeline.

The shield underpass section 1 comprises a midspan section and an edge-span section. Two ends of the midspan pipe section are respectively connected with an edge-span pipe section. The side span pipe sections at the two ends of the midspan pipe section are respectively arranged right below the two opposite sides of the risk source structure 4.

The midspan section includes a plurality of standard tube sheets spliced together.

The side span segment includes a plurality of reinforcing segments 111 spliced together.

Wherein the diameter of the main ribs of the reinforced duct piece 111 is larger than that of the standard duct piece. The number of the grout holes 10 of the reinforcing duct piece 111 is greater than that of the standard duct piece.

In the present embodiment, the water stop hoop 2 covering a ring of pipe pieces of the shield underpass section 1 is formed by deep-hole grouting the first slurry in the radial direction of the shield through the grouting holes 10 of the shield underpass section 1. The number of the water stop hoop 2 is plural. And a water stop hoop is formed outside the assembled ring pipe piece. A plurality of stagnant water hoop 2 set up along the shield structure section 1 of wearing down length direction interval.

In this embodiment, the bearing strip 3 is formed by grouting a second slurry through the ground between the risk source structure 4 and the shield to consolidate.

In a preferred embodiment, the number of the grouting holes 10 of the reinforcing tube piece 111 is sixteen.

In this embodiment, the circumferential main rib of the standard duct piece is phi 18mm, and the circumferential main rib of the reinforced duct piece is phi 20mm. The standard pipe piece is provided with six grouting holes. The number of the grouting holes for reinforcing the duct piece is 16, namely, 10 grouting holes are additionally arranged on the basis of the number of the grouting holes of the original standard duct piece, and 16 grouting holes are formed in total. Wherein, the original six grouting holes are used as hoisting holes. The utility model discloses a reinforced structure who wears the risk source under the shield constructs takes the beaded finish side span pipeline section to avoid slip casting pressure too big to lead to the section of jurisdiction breakage of the section of striding of standard ring.

In a preferred embodiment, a plurality of water stop rings 2 are arranged at intervals of two ring sheets, that is, as shown in fig. 3, a water stop ring is formed on the outer portion of one ring sheet in each three ring sheet.

Specifically, the first slurry to be consolidated to form the water stop hoop is a two-liquid type slurry. The first slurry includes a cement slurry and water glass.

And when the water stop hoop is formed by grouting, grouting in the circumferential direction of the shield radial deep hole. And performing annular grouting by adopting a mass ratio of cement paste to water glass of 1:1 biliquid thick liquid, 3 rings at every interval carry out radial deep hole slip casting through 16 injected holes of strengthening the section of jurisdiction, and slip casting pipe (stock) is long 2.5m, and every interval kringle sets up one stagnant water hoop, and the multichannel stagnant water hoop that the interval set up has the effect for shaping tunnel stagnant water and firm stratum.

In this embodiment, the second slurry is a cement slurry. Specifically, consolidate in shield structure construction influence within range, longitudinal extent is 5 meters around the gas pipeline to require to carry out low pressure slip casting near the pipeline region, avoid the slip casting to cause the destruction to the pipeline, the slip casting adopts grout, and concrete mix proportion can be according to the preceding experiment in the scene and adjust. The soil body after grouting reinforcement meets the following requirements: the soil body has good uniformity and self-standing property, and the unconfined compressive strength of the soil body is 0.5-0.8MPa.

In a preferred embodiment, the side span segment includes a three-ring reinforcing segment 111. The front 3 rings and the rear 3 rings of the positive line of the gas pipeline are spliced by reinforcing pipe pieces to form an edge-span pipe section.

The utility model discloses a reinforced structure who wears risk source under shield constructs, through taking the ground to set up slip casting pipe slip casting formation pressure-bearing plate area to risk source structures and consolidate and through strengthening the section of jurisdiction (to risk source structures influence within range) and shield structure radial deep hole slip casting formation interval set up the stagnant water hoop, optimize the shield structure machine simultaneously and dig the parameter, make the quality that ground subsides, structures warp and subside, forming tunnel obtain effective control.

The utility model provides a shield constructs down wears reinforced structure's of risk source construction method, including following step:

s1: and grouting the second slurry between the risk source structure 4 and the tunneling line of the shield through the ground to form the bearing plate strip 3 through consolidation.

S2: when the shield machine tunnels below a risk source structure 4, a shield underpass section 1 is formed by assembling below a pressure-bearing plate strip 3, when the shield underpass section 1 is assembled, a plurality of reinforcing pipe pieces 111 are assembled to form side span pipe sections under opposite two sides of the pressure-bearing plate strip 3, and a plurality of standard pipe pieces are assembled to form a midspan pipe section under the middle part of the pressure-bearing plate strip 3, so that the midspan pipe sections are connected to the two side span pipe sections to form the shield underpass section 1.

S3: the first slurry is injected into the deep hole along the radial direction of the shield through the injection hole 10 of the shield downward-penetrating section 1 to form a water-stopping hoop 2 which covers one ring of pipe pieces of the shield downward-penetrating section 1, and the water-stopping hoops 2 are arranged at intervals along the length direction of the shield downward-penetrating section 1.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The utility model provides a reinforcing structure of risk source is worn under shield, its characterized in that includes:

the first slurry is injected into the deep hole along the radial direction of the shield through the injection hole of the shield downward-penetrating section to form the water-stopping hoop which covers one ring of pipe pieces of the shield downward-penetrating section, and the water-stopping hoops are arranged at intervals along the length direction of the shield downward-penetrating section;

and the second slurry is grouted between the risk source structure and the shield through the ground to form the bearing plate strip in a consolidation mode.

2. The reinforcement structure for shield tunneling risk sources of claim 1, wherein the number of grouting holes for reinforcing a segment is sixteen.

3. The reinforcing structure of a shield tunneling risk source according to claim 1, wherein a plurality of the water stop hoops are arranged by two ring pipe pieces.

4. The reinforcing structure of a shield tunneling risk source according to claim 1, wherein the first grout comprises cement paste and water glass.

5. The reinforcing structure of a shield tunneling risk source according to claim 1, wherein the second grout is cement grout.

6. The reinforcement structure for a shield tunneling risk source according to claim 1, wherein the side-span segment comprises three rings of said reinforcing segments.