CN217176629U - Structure for enlarging and reconstructing shield starting tunnel portal - Google Patents
Structure for enlarging and reconstructing shield starting tunnel portal Download PDFInfo
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- CN217176629U CN217176629U CN202220509177.4U CN202220509177U CN217176629U CN 217176629 U CN217176629 U CN 217176629U CN 202220509177 U CN202220509177 U CN 202220509177U CN 217176629 U CN217176629 U CN 217176629U
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Abstract
The utility model relates to a structure that is used for shield to construct to originate portal and enlarges transformation, shield to construct and to originate portal and locate the headwall on the wall, enlarge the structure of transforming and include: the reinforcing steel member is fixedly attached to the end wall and is annular, and the reinforcing steel member is arranged on the periphery of the shield starting tunnel portal and is matched with the size of a new tunnel portal to be expanded; and a new tunnel portal formed by chiseling a part of the end wall, which is positioned between the shield starting tunnel portal and the reinforcing steel member, is positioned inside the reinforcing steel member. This application plays reinforced (rfd) effect through reinforcing steel member around to the portal, need not pre-buried steel ring, consequently only need chisel out the part that is located reinforcing steel member on the headwall to reduce the regional scope of chisel out greatly, avoided influencing the steadiness of station structure because of destroying the buttress on the headwall.
Description
Technical Field
The utility model relates to a track traffic technical field refers in particular to a structure that is used for shield to construct originating portal and enlarges and reform transform.
Background
In the urban rail transit construction field, the steel ring required for shield launching is usually launched after the completion of pre-burying the steel ring and then casting a concrete structure in situ at a newly built underground station, but in the connection of urban and urban rail transit, the diameter of a shield tunnel needs to be increased due to the change of the speed during design and operation and the like, and a new shield machine with a large size needs to be replaced, so that the diameter of a tunnel portal needs to be increased when the launching is carried out at the built station so as to meet the requirement of the launching of the shield machine with the large diameter.
A buttress column is arranged between a left linear hole door and a right linear hole door of the station structure, the buttress column and an end wall are integrally cast and formed, a steel ring is embedded and fixed on the end wall, and the arrangement position of the steel ring is usually close to the buttress column. In the existing expanding and reforming construction of the shield starting tunnel portal, an original steel ring is generally broken off integrally, and then a new steel ring is poured and embedded, but because the size of the new steel ring is larger, and the size of a chiseled area is generally larger than that of the new steel ring for pouring concrete and embedding the new steel ring, the chiseled area can be partially overlapped with a buttress column, so that the method is only suitable for expanding in a small range, and the problem that how to ensure the large-scale expanding of the shield starting tunnel portal and not influence the station structure needs to be solved urgently is solved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a structure that is used for the shield to construct the portal of starting to enlarge and reform transform to solve current shield and construct the portal of starting to enlarge and reform transform and can influence the problem of buttress post.
In order to achieve the above object, the utility model provides a structure that is used for shield to construct to originate portal and enlarges transformation, the shield constructs to originate the portal and locates the end wall on, enlarge the structure that reforms transformation and include:
the reinforcing steel member is fixedly attached to the end wall and is annular, and the reinforcing steel member is arranged on the periphery of the shield starting tunnel portal and is matched with the size of a new tunnel portal to be expanded;
a new portal formed by chiseling a portion of the headwall between the shield originating portal and the reinforcing steel member, the new portal being located inside the reinforcing steel member.
The utility model discloses a fixed reinforcing steel member of installation on the headwall, reinforcing steel member is cyclic annular and follows the edge setting of the design position after the portal enlarges, and then define the scope of new portal through reinforcing steel member, the regional scope of required chisel promptly, and play reinforced (rfd) effect around to the portal through reinforcing steel member, need not pre-buried steel ring, consequently only need chisel to remove the part that is located reinforcing steel member on the headwall, thereby the regional scope of chisel has been reduced greatly, avoid influencing the steadiness of station structure because of the buttress on the destruction headwall.
The utility model is used for the shield constructs the structure that the portal enlarged and reformed transform that starts further improves and lies in, still include the drawknot connect in the headwall with consolidate the rope between the steel member top, the rope is the slope form setting.
The utility model is used for the shield constructs the structure that the portal enlarged and reformed transform that starts further improves and lies in, still is fixed in including the support consolidate the supporting component in the steel member.
The utility model is used for the shield constructs the further improvement that the portal enlarges the structure of reforming transform and lies in, consolidate the steel member and include in order the concatenation connect and be a plurality of concatenation section of arc form.
The utility model is used for the shield constructs the structure that the portal enlarged and reformed transform that starts further improves and lies in, still is fixed in including the support the reinforcement at concatenation section both ends, the reinforcement is located on the intrados face of concatenation section, it is adjacent reinforcement fixed connection.
The utility model discloses a further improvement of the structure that is used for the shield to construct the starting portal to enlarge and reform transform lies in, the reinforcement includes the first connecting portion of fixed connection in the one end of concatenation section and the second connecting portion of fixed connection in the other end of concatenation section;
the first connecting portion and the second connecting portion are far away from the end portions of the splicing sections and are fixedly connected.
The utility model is used for the shield constructs the structure that the portal enlarged and reformed transform that starts further improves and lies in, first connecting portion with the junction of second connecting portion is close to consolidate the setting of centre of a circle department of steel member.
The utility model is used for the shield constructs the structure that the portal enlarged and reformed transform that starts further improves and lies in, still be fixed in including the support the piece of shoring in the reinforced steel member, the piece of shoring with the reinforcement installation is fixed.
The structure for enlarging and reconstructing the shield starting tunnel portal of the utility model is further improved in that the structure also comprises a bracket arranged on the ground;
the bottom of the reinforcing steel member is fixedly installed on the bracket.
Drawings
Fig. 1 is a schematic structural view of the utility model for enlarging and reconstructing the starting tunnel portal of the shield.
Fig. 2 is a partially enlarged schematic view of fig. 1.
Fig. 3 is a side view of the structure for enlarging and reconstructing the tunnel portal of the shield starting of the present invention, which is installed on the end wall.
Fig. 4 is a partially enlarged view of fig. 3.
Fig. 5 is a schematic structural view of the bracket in the structure for enlarging and reconstructing the tunnel portal of the shield starting of the present invention.
Fig. 6 is a state diagram of the structure for enlarging and reconstructing the shield starting tunnel portal of the present invention, which is installed on the end wall with buttress columns.
In the figure: the end wall 10, the buttress 11, the reinforcing steel member 20, the splicing section 21, the inner ring plate 22, the outer ring plate 23, the sleeve 24, the rib plate 25, the reinforcing member 30, the first connecting portion 31, the second connecting portion 32, the shoring member 40, the rope 50, the bracket 60, the first i-steel 61, the second i-steel 62 and the support plate 63.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a structure that is used for shield to construct originating portal to enlarge transformation defines out the scope of new portal through strengthening the steel member, and the regional scope is removed in required chisel promptly, plays reinforced effect around the portal, need not pre-buried steel ring, has reduced the regional scope of chisel greatly, avoids damaging the station structure.
The structure of the present invention for enlarging and reconstructing the starting tunnel portal of a shield will be described with reference to the accompanying drawings.
Referring to fig. 1 and 3, in the present embodiment, a structure for enlarging a shield starting tunnel portal is provided on an end wall, and the structure for enlarging includes: the reinforcing steel member 20 is fixedly attached to the end wall 10 and is in a ring shape, and the reinforcing steel member 20 is arranged on the periphery of the shield starting tunnel portal and the size of the reinforcing steel member is matched with that of a new tunnel portal to be formed in an expanded mode; the new portal is located inside the reinforcing steel member 20 by chiseling a new portal formed by a portion of the headwall 10 located between the shield originating portal and the reinforcing steel member 20.
The structure of the enlargement modification in the present embodiment defines the range of a new portal by using the reinforcing steel member 20 installed on the headwall 10, and simultaneously reinforces the periphery of the portal to ensure the stress performance of the structure around the portal, on one hand, the safety of chiseling construction can be ensured by the reinforcing steel member 20, and on the other hand, the reinforcing steel member 20 is adapted to the size of a new shield machine to ensure that the shield can start tunneling smoothly. Because need not pre-buried steel ring, consequently only need chisel the part that lies in reinforcing steel member 20 on the headwall 10 to significantly reduced the regional scope of chisel, greatly reduced the construction volume of chisel and removing, avoid influencing the steadiness of station structure because of destroying buttress post 11 on the headwall 10, thereby guarantee that existing station structure is not destroyed assurance security and water-proof effects, have that construction period is short, characteristics that construction cost is low.
Referring to fig. 6, it is preferable that the reinforcing steel members 20 are spaced apart from the buttress 11 on the headwall 10 to avoid the buttress 11.
Referring to fig. 3 and 4, in one embodiment, the retrofit structure further includes a cable 50 tied between the headwall 10 and the top of the reinforcing steel member 20, the cable 50 being disposed in an inclined configuration. Preferably, the rope 50 is a plurality of steel strands. The top of the reinforcing steel member 20 is hung and fixed on the end wall 10 through the rope 50, so that the reinforcing steel member 20 is prevented from being deformed due to overlarge pressure when the shield tunneling machine enters the reinforcing steel member 20.
Referring to fig. 3 and 4, the structure of the enlarged modification further includes a mounting seat fixed on the headwall 10 corresponding to the rope 50, and the top end of the rope 50 is fixed on the mounting seat.
Referring to fig. 1 and 2, in one embodiment, the up-grading structure further includes a support assembly supported and fixed in the reinforcing steel member 20, and the reinforcing steel member 20 is supported and supported by the support assembly.
Referring to fig. 1 and 2, further, a support assembly is provided adjacent an end of the reinforcing steel member 20 remote from the headwall 10.
Referring to fig. 1 and 2, in one embodiment, the reinforcing steel member 20 includes a plurality of segments 21 connected in series and having an arc shape. Preferably, there are 4 splicing segments 21, and the central angle corresponding to the splicing segment 21 is 90 °.
Referring to fig. 1 and fig. 2, further, the structure of the enlargement modification further includes reinforcing members 30 supported and fixed at two ends of the splicing section 21, the reinforcing members 30 are located on the intrados of the splicing section 21, and adjacent reinforcing members 30 are fixedly connected. The reinforcing part 30 can be used for reinforcing and supporting the splicing section 21, and the splicing section 21 can be prevented from deforming in the transportation process.
Referring to fig. 1 and 2, further, the reinforcing member 30 includes a first connecting portion 31 fixedly connected to one end of the splicing section 21 and a second connecting portion 32 fixedly connected to the other end of the splicing section 21; the ends of the first connecting portion 31 and the second connecting portion 32 away from the splicing section 21 are fixedly connected.
Referring to fig. 1 and 2, further, the connection of the first connection portion 31 and the second connection portion 32 is disposed near the center of the reinforcing steel member 20.
Referring to fig. 1 and 2, preferably, the first connection portion 31 is perpendicular to the second connection portion 32.
Referring to fig. 1 and 2, in an embodiment, the structure of the enlargement includes a top support 40 supported and fixed in the reinforcing steel member 20, a center of the top support 40 coincides with a circle center of the reinforcing steel member 20, and the top support 40 is fixedly installed with the reinforcing member 30.
Referring to fig. 1 and 2, further, the joint of the first connecting portion 31 and the second connecting portion 32 is fixed on the top support 40, and the top support 40 fixedly connects the plurality of reinforcing members 30 together, so as to form a stable support assembly with strong stress performance.
Referring to fig. 1 and 2, further, the top supporting member 40 is in a cross shape and includes a first diagonal rod and a pair of second diagonal rods symmetrically fixed at two sides of the middle portion of the first diagonal rod, the joint of the first diagonal rod and the second diagonal rod coincides with the center of the circle of the reinforced steel member 20, and the first diagonal rod and the second diagonal rod are respectively arranged in a staggered manner with the first connecting portion 31 and the second connecting portion 32.
Referring to fig. 1 and 2, in a specific embodiment, the steel member comprises an inner ring plate 22 and an outer ring plate 23 which are arranged in parallel, a sleeve 24 vertically connected between the inner ring side of the inner ring plate 22 and the inner ring side of the outer ring plate 23, and a rib plate 25 vertically connected between the inner ring plate 22 and the opposite side surface of the outer ring plate 23, wherein the inner ring plate 22 is attached and fixed on the end wall 10 and is in a ring shape, the outer ring plate 23 is in a ring shape, the rib plate 25 is vertically fixed on the outer wall of the sleeve 24, and the size of the inner ring plate 22, the size of the inner ring of the outer ring plate 23 and the size of the sleeve 24 are matched with the designed enlarged size of the tunnel door.
Referring to fig. 1 and 2, preferably, the cross brace 25 has a mounting hole, a hanging ring is mounted on the mounting hole, and the rope 50 is mounted on the hanging ring.
Referring to fig. 1 and 5, in one embodiment, the retrofit structure further includes a bracket 60 mounted above the ground; the bottom of the reinforcing steel member 20 is fixedly installed on the bracket 60. The bottom of the reinforcing steel member 20 is dragged by the bracket 60, the bottom of the reinforcing steel member is reinforced and supported, and the reinforcing steel member 20 is prevented from deforming when the shield tunneling machine enters the reinforcing steel member 20.
Referring to fig. 1 and 5, the bracket 60 further includes a pair of first i-beams 61 installed on the ground and arranged in parallel, a plurality of second i-beams 62 vertically connected between the pair of first i-beams 61 and arranged at intervals, and support plates 63 symmetrically fixed on two ends of the first i-beams 61.
Referring to fig. 1, further, the top surface of the supporting plate 63 is arc-shaped and matched with the sleeve 24 and is fixedly connected with the sleeve 24.
The construction process of the structure for expanding and transforming the starting tunnel portal of the shield of the utility model is explained below.
Existing door lofting → marking cut-out profile → installing the upper semicircle 2-piece splice section 21 → installing the rope 50 to hang the upper semicircle → installing the bracket 60 → installing the lower semicircle 2-piece splice section 21 → chiseling the concrete in the inner area of the reinforcing steel member 20.
The following description is further provided in conjunction with the embodiments.
The diameter of the existing station portal steel ring is 6380mm, and the diameter of the newly designed portal needs to be externally expanded by 7400 mm.
S1: and (3) lofting the existing station portal, performing construction lofting on the existing station headwall 10 according to the circle center of the designed portal, marking a cut contour line and making a positioning mark through a diameter cross line of the circle center.
S2: 2 splicing sections 21 of the upper semicircle are installed, the splicing sections 21 are connected through splicing bolts, an inner ring plate 22 is attached to the end wall 10 and fixed on the end wall 10 through expansion bolts, and a rubber gasket is arranged between the inner ring plate 22 and the structural end wall 10 for sealing. Grouting pipes are reserved at 2 points and 10 point positions of the steel ring, the grouting pipes are provided with DN50 steel pipes, 50mm of exposed ends are provided with external threads, and the steel ring is matched with a 1.5-inch copper ball valve.
S3: and (3) installing anti-falling measures, namely anchoring the installation base into the end wall 10 by adopting expansion bolts at the positions of 10 points, 11 points, 12 points, 1 point and 2 points (only upper semi-circles) on the reinforcing steel member 20 along the upper part of the end wall 10 corresponding to the radial direction, fixing the installation base on the end wall 10, installing and fixing the top end of the steel strand on the installation base, and installing and fixing the bottom end of the steel strand on the rib plate 25 to form the anti-falling device.
S4: the mounting bracket 60 is installed on the ground corresponding to the arrangement position of the reinforcing steel member 20.
S5: 2 concatenation sections 21 of semicircle under the installation, will be 2 concatenation sections 21 of semicircle down arrange in on the backup pad 63 that corresponds and with corresponding backup pad 63 fixed connection, will 2 concatenation sections 21 of semicircle down and last semicircle concatenation section 21 adopt to assemble bolted connection, concatenation section 215 point, 7 position reservation slip casting pipes, the slip casting pipe just has DN50 steel pipe, exposes end 50mm and sets up the external screw thread, joins in marriage 1.5 cun copper ball valve.
S6: the water drill is used to cut along the inner wall of the reinforcing steel member 20, and the middle portion is broken.
The utility model also provides an utilize as foretell a construction method who is used for shield to construct structure that the portal enlarged and reformed transform that starts, including following step:
the reinforcing steel member 20 is fixedly attached to the end wall 10, and the reinforcing steel member 20 is arranged on the periphery of the shield starting tunnel portal and the size of the reinforcing steel member is matched with that of a new tunnel portal to be formed in an expanding mode;
a new portal formed at a portion of the headwall 10 between the shield originating portal and the reinforcing steel member 20 is chiseled so that the new portal is located inside the reinforcing steel member 20.
In one embodiment, when installing the reinforcing steel member 20, a rope 50 is provided, and the rope 50 is obliquely tied and connected between the headwall 10 and the top of the reinforcing steel member 20.
Further, when the reinforcing steel member 20 is installed, a support assembly is provided to support and fix the support assembly in the reinforcing steel member 20.
Furthermore, the reinforcing steel member 20 that provides includes a plurality of concatenation section 21 that is the arc form, and when installing reinforcing steel member 20, install earlier and be located the concatenation section 21 of upper half, install the concatenation section 21 that is located the latter half again.
Furthermore, the reinforcing members 30 are provided, the reinforcing members 30 are supported and fixed at two ends of the splicing section 21, and the reinforcing members 30 are located on the intrados of the splicing section 21, so as to fixedly connect the adjacent reinforcing members 30.
Furthermore, the reinforcing member 30 includes a first connecting portion 31 and a second connecting portion 32, and when the reinforcing member 30 is installed, the first connecting portion 31 is fixedly connected to one end of the splicing section 21, the second connecting portion 32 is fixedly connected to the other end of the splicing section 21, and the first connecting portion 31 and the second connecting portion 32 are fixedly connected to the end portion far away from the splicing section 21.
Preferably, the connection of the first connection portion 31 and the second connection portion 32 is disposed near the center of the reinforcing steel member 20.
In one embodiment, a top brace 40 is provided, the top brace 40 is supported and fixed in the reinforcing steel member 20, and the top brace 40 is fixed to the reinforcing member 30.
A bracket 60 is provided, the bracket 60 is installed on the ground, and the bottom of the reinforcing steel member 20 is fixed to the bracket 60.
The reinforcing members 30 and the shores 40 are removed before the shield machine is initiated into the hole.
It should be noted that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention.
Claims (9)
1. A structure for shield-originating portal enlargement, the shield-originating portal being located on an end wall, the enlargement comprising:
the reinforcing steel member is fixedly attached to the end wall and is annular, and the reinforcing steel member is arranged on the periphery of the shield starting tunnel portal and is matched with the size of a new tunnel portal to be expanded;
a new portal formed by chiseling a portion of the headwall between the shield originating portal and the reinforcing steel member, the new portal being located inside the reinforcing steel member.
2. The structure for shield-originating tunnel portal enlargement reconstruction of claim 1 further including a drawstring connected between said headwall and the top of said reinforcing steel member, said cable being disposed in an inclined configuration.
3. The structure for shield-originating portal enlargement reconstruction of claim 1 further including a support assembly supportively secured within said reinforcing steel member.
4. The structure for shield originating portal enlargement reconstruction as claimed in claim 1, wherein said reinforcing steel member includes a plurality of segments connected in series and having an arc shape.
5. The structure for shield-originating portal enlargement reconstruction of claim 4 further including reinforcing members supportingly secured to both ends of said spliced section, said reinforcing members being located on the intrados of said spliced section, adjacent ones of said reinforcing members being fixedly connected.
6. The structure for shield originating tunnel portal enlargement reconstruction of claim 5, wherein said reinforcement member includes a first connection portion fixedly connected to one end of said spliced section and a second connection portion fixedly connected to the other end of said spliced section;
the first connecting portion and the second connecting portion are far away from the end portions of the splicing sections and are fixedly connected.
7. The structure for shield originating portal enlargement modification of claim 6, wherein a junction of the first connection portion and the second connection portion is disposed near a center of the reinforcing steel member.
8. The structure for shield-originating portal enlargement reconstruction of claim 5 further including a shoring member supportingly secured within said reinforcing steel member, said shoring member being fixedly secured to said reinforcing member.
9. The structure for shield originating tunnel portal enlargement reconstruction of claim 1 further including a bracket mounted above ground;
the bottom of the reinforcing steel member is fixedly installed on the bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220509177.4U CN217176629U (en) | 2022-03-09 | 2022-03-09 | Structure for enlarging and reconstructing shield starting tunnel portal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220509177.4U CN217176629U (en) | 2022-03-09 | 2022-03-09 | Structure for enlarging and reconstructing shield starting tunnel portal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217176629U true CN217176629U (en) | 2022-08-12 |
Family
ID=82743694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220509177.4U Active CN217176629U (en) | 2022-03-09 | 2022-03-09 | Structure for enlarging and reconstructing shield starting tunnel portal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217176629U (en) |
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2022
- 2022-03-09 CN CN202220509177.4U patent/CN217176629U/en active Active
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