CN211143118U - Assembled steel construction box utility tunnel underground structure - Google Patents
Assembled steel construction box utility tunnel underground structure Download PDFInfo
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- CN211143118U CN211143118U CN201920500322.0U CN201920500322U CN211143118U CN 211143118 U CN211143118 U CN 211143118U CN 201920500322 U CN201920500322 U CN 201920500322U CN 211143118 U CN211143118 U CN 211143118U
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Abstract
The utility model discloses an assembly type steel structure box type comprehensive pipe rack foundation pit supporting structure, which comprises an outer support arranged between a foundation pit wall on the upper part of a pipe rack and the pipe rack, wherein one end of the outer support leans against the foundation pit wall, and the other end is connected with a longitudinal flange on the outer side of the upper part of the pipe rack; the short outer support is arranged on the vertical flange on the upper portion between the gallery bodies, the two ends of the short outer support are connected and fixed to the vertical flanges on the upper portions of the two adjacent gallery bodies respectively, then the inner support is arranged inside the pipe gallery, the two ends of the inner support are connected with the vertical flange on the upper portion of the pipe gallery respectively, and after connection is completed, the outer support and the inner support are on the same straight line to form a substitute support. The utility model discloses an assembled steel construction box utility tunnel underground structure and construction method efficiency of construction is high, stable in structure, and the security is high.
Description
Technical Field
The utility model discloses an assembled utility tunnel structure, especially an assembled steel construction box utility tunnel underground structure.
Background
The darker foundation ditch of utility tunnel, it is saved to adopt the cost to some, the convenient steel sheet fender pile of construction, but steel sheet fender pile intensity is lower, as shown in figure 1, need set up upper strut and former basic pit lower part support twice horizontal support on the horizontal or face of foundation ditch, its height that highly often is less than steel construction piping lane is supported in the middle of nevertheless, the vertical propulsion of piping lane construction has been influenced, and to steel construction piping lane, its structure is the decoration wall structure, hardly utilize piping lane structure self intensity, set up the inward thrust of structural support to the side stake, in order to reach the purpose of demolising former basic pit lower part support when vertically advancing.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model discloses an assembled steel construction box utility tunnel underground structure, this assembled steel construction box utility tunnel underground structure can replace former foundation ditch lower part to support when the piping lane vertically impels the installation to accelerate the construction progress.
The technical scheme is as follows: an assembled steel structure box type comprehensive pipe gallery foundation pit supporting structure comprises an outer support and an inner support; the outer support is arranged between the foundation pit wall at the upper part of the pipe gallery and the pipe gallery; one end of the outer support is connected with the foundation pit wall, and the other end of the outer support is connected with a longitudinal flange on the outer side of the upper part of the pipe gallery; the two ends of the inner support are respectively connected with the upper part of the pipe gallery.
When the assembled comprehensive pipe rack is a multi-cabin pipe rack, short external supports are arranged between the bodies of the multi-cabin pipe rack; the both ends of short outer vertical support are connected and fixed respectively on two adjacent pipe gallery body upper portion longitudinal flanges.
The outer support, the short outer support and the inner support are arranged on the same straight line, and two ends of the inner support are connected to the longitudinal flange on the upper portion of the pipe gallery respectively. The outer support, the short outer support and the inner support together form a substitute support, so that each force application point and each force transmission point are concentrated on the longitudinal flange of the pipe gallery.
In order to make the substitute support adjacent to the original pit lower support, an outer support, a short outer support and an inner support are provided at the end of the unit pipe gallery.
After the backfill construction is finished, the outer support and the short outer support are buried in the backfill, and the inner support can be dismantled.
The utility model also discloses an assembled utility tunnel construction method, including following step:
step 1) firstly, arranging an arched corrugated steel plate bottom plate of a steel structure box type comprehensive pipe gallery in place according to the elevation and size positions of design requirements, and connecting the bottom plates of all pipe galleries in the axial direction; sealing the bottom plates between the sections, and taking a temporary bottom plate floating resisting measure; then fixing each bottom plate, and further carrying out transverse connection of each cabin bottom plate;
step 2) filling concrete into a gap between the bottom plate and the substrate, and after the concrete reaches a certain strength, starting to install the side plate and the top plate of the first pipe gallery; after the installation, an outer support is respectively arranged between the foundation pit wall at the upper part of the pipe gallery and the pipe gallery, one end of the outer support leans against the foundation pit wall, and the other end of the outer support is connected with a longitudinal flange at the outer side of the upper part of the pipe gallery;
step 3) when the assembled comprehensive pipe gallery is a multi-cabin pipe gallery, arranging a short outer support on an upper longitudinal flange between gallery bodies, wherein two ends of the short outer support are respectively connected and fixed on the longitudinal flanges at the upper parts of two adjacent gallery bodies;
step 4) arranging an inner support in the pipe gallery, wherein two ends of the inner support are respectively connected with a longitudinal flange at the upper part of the pipe gallery, and after connection is finished, each outer support, the inner support and the short outer support are on the same straight line to form a substitute support;
step 5) removing the support at the lower part of the original foundation pit adjacent to the substitute support, installing the side plate and the top plate of the second section of steel pipe, installing the substitute support of the second section of pipe gallery according to the requirements, and pushing the pipe gallery in the axial direction for construction by analogy;
step 5) when the assembled comprehensive pipe gallery is a multi-cabin pipe gallery, filling concrete in gaps among cabin bodies; after the pipe gallery is installed to reach the required axial length, backfilling construction is started, the backfilling on the two sides of the pipe side needs to be fully dense, and when a common stress structure of the gallery body structure and the pipe soil of the peripheral backfilling is basically formed, the inner support in the pipe gallery can be detached; when the height of the backfill soil is close to that of the upper support of the foundation pit, the original upper support of the foundation pit is removed and backfilled to the ground, and then the steel sheet pile can be pulled out as required.
In order to enable the replacement of the original pit lower supports after the replacement support is installed, the length of the first pipe gallery in the step 2) is as close as possible to the net distance between the original pit lower supports. And, the position of the substitute support in step 4) is arranged at the end part of the pitch corridor and is adjacent to the original pit lower support.
Has the advantages that: the utility model discloses an assembly type steel structure box type comprehensive pipe gallery foundation pit supporting structure, which realizes the feasibility of longitudinal propulsion installation under the condition of deep foundation pit and steel sheet pile supporting of a semi-flexible (plastic) structure of the assembly type steel structure comprehensive pipe gallery; the supporting is replaced to act on each acting point on the steel pipe gallery, the force and the force transmission point are both on a longitudinal flange of the steel pipe gallery, and the longitudinal flange is a part with the highest strength in each direction in the structure of the steel pipe gallery, and the acting point and the force transmission point of the force transmission point can not generate deformation; the strength of the longitudinal flange in each direction is high, so that the lateral instability of the substitute support can be prevented; the utility model discloses an assembled utility tunnel construction method, the high time limit for a project of efficiency of construction is fast, saves foundation ditch and maintenance cost.
Drawings
FIG. 1 is a prior art assembled steel structure box type comprehensive pipe gallery foundation pit supporting structure;
fig. 2 is the utility model discloses an assembled steel construction box utility tunnel underground structure.
Detailed Description
As shown in fig. 2, the foundation pit supporting structure of the assembly type steel structure box type comprehensive pipe gallery comprises an outer support 1, a short outer support 2 and an inner support 3; the outer support 1 is arranged between the foundation pit wall at the upper part of the pipe gallery and the pipe gallery; one end of the outer support 1 is connected with the foundation pit wall, and the other end of the outer support is connected with the longitudinal flange on the outer side of the upper part of the pipe gallery; two ends of the short external vertical support 2 are respectively connected and fixed on the longitudinal flanges at the upper parts of the two adjacent pipe gallery bodies; the both ends of interior support 3 are connected with piping lane upper portion respectively, and the vertical flange on piping lane upper portion is connected respectively at interior 3 both ends of supporting. The outer support 1, the short outer support 2 and the inner support 3 are in the same straight line to form a substitute support. The replacement support is adjacent to the original pit lower support.
After the backfill construction is finished, the outer supports 1 and the short outer supports 2 are buried in the backfill, and the inner supports 2 can be detached.
The construction method of the assembly type comprehensive pipe rack adopting the assembly type steel structure box type comprehensive pipe rack foundation pit supporting structure comprises the following steps:
step 1) firstly, arranging an arched corrugated steel plate bottom plate of a steel structure box type comprehensive pipe gallery in place according to the elevation and size positions of design requirements, and connecting the bottom plates of all pipe galleries in the axial direction; sealing the bottom plates between the sections, and taking a temporary bottom plate floating resisting measure; then fixing each bottom plate to prevent the bottom plates from floating or shifting upwards when the holes between the substrate and the bottom plates are filled with concrete in the later period; when the pipe gallery is multi-cabin, the transverse connection of all cabin bottom plates is required to be made; if the uplift pile exists, connection between the bottom plate and the uplift pile needs to be made;
step 2) filling concrete into the gap between the base plate and the substrate, wherein the filling height is up to the highest intersection point of the sealing surface of the longitudinal flange on the base plate and the corrugated steel plate; filling, and after the concrete reaches a certain strength, starting to install the side plates and the top plate of the first pipe gallery; the length of the pipe gallery is as close as possible to the net distance between the supports at the lower part of each original foundation pit; after the installation, an outer support 1 is respectively arranged between the foundation pit wall at the upper part of the pipe gallery and the pipe gallery, one end of the outer support 1 leans against the foundation pit wall, and the other end is connected with a longitudinal flange at the outer side of the upper part of the pipe gallery;
step 3) when the assembled comprehensive pipe gallery is a multi-cabin pipe gallery, arranging a short outer support 2 on an upper longitudinal flange between gallery bodies, and respectively connecting and fixing two ends of the short outer support 2 to the longitudinal flanges on the upper parts of two adjacent gallery bodies;
step 4) arranging an inner support 3 in the pipe gallery, wherein two ends of the inner support 3 are respectively connected with a longitudinal flange at the upper part of the pipe gallery, and after connection is finished, each outer support 1, the inner support 3 and the short outer support 2 are on the same straight line to form a substitute support; the location of the alternative support, although located at the end of the pitch corridor and adjacent to the original pit lower support 4;
step 5) dismantling the original foundation pit lower support 4 adjacent to the substitute support, installing a side plate and a top plate of a second section of steel pipe, installing the substitute support of the second section of pipe gallery according to the requirement, and pushing the pipe gallery in the axial direction for construction by analogy;
step 6), when the assembled comprehensive pipe gallery is a multi-cabin pipe gallery, filling concrete into gaps among cabin bodies; after the pipe gallery is installed to reach the required axial length, backfill construction is started, the backfill on two sides of the pipe side needs to be fully compacted, the height of the backfill exceeds one meter of the pipe top, when the common stress structure of the gallery body structure and the pipe soil of the backfill around is basically formed, the inner support 2 in the pipe gallery can be removed, and each outer support is buried in the backfill soil without removal or dismantling; and when the height of the backfilled soil is close to that of the upper support of the foundation pit, removing the upper support 5 of the original foundation pit, backfilling to the ground, and then pulling out the steel sheet pile 6 according to the requirement.
In the process, the concrete of the substrate is preferably foam concrete.
Claims (7)
1. The utility model provides an assembled steel construction box utility tunnel underground structure, its characterized in that: comprises an outer support (1) and an inner support (3); the outer support (1) is arranged between the foundation pit wall at the upper part of the pipe gallery and the pipe gallery; one end of the outer support (1) is connected with the foundation pit wall, and the other end of the outer support is connected with the longitudinal flange on the outer side of the upper part of the pipe gallery; and the two ends of the inner support (3) are respectively connected to the upper longitudinal flange inside the pipe gallery.
2. The assembly type steel structure box utility tunnel excavation supporting construction of claim 1, its characterized in that: the assembled comprehensive pipe rack is a multi-cabin pipe rack, and short outer supports (2) are arranged between the bodies of the multi-cabin pipe rack; the two ends of the short outer support (2) are respectively connected and fixed on the longitudinal flanges at the upper parts of the two adjacent pipe gallery bodies.
3. The assembly type steel structure box utility tunnel excavation supporting construction of claim 1, its characterized in that: the outer support (1) and the inner support (3) are on the same straight line.
4. The assembly type steel structure box utility tunnel excavation supporting construction of claim 2, its characterized in that: the outer support (1), the short outer support (2) and the inner support (3) are on the same straight line.
5. The assembly type steel structure box type comprehensive pipe gallery foundation pit supporting structure of claim 3 or 4, characterized in that: the outer support (1) and the inner support (3) are arranged at the end part of the unit pipe gallery body.
6. The assembly type steel structure box type comprehensive pipe gallery foundation pit supporting structure of claim 3 or 4, characterized in that: the outer support (1) and the inner support (3) are adjacent to the original pit lower support.
7. The assembly type steel structure box utility tunnel excavation supporting construction of claim 2, its characterized in that: the outer support (1) and the short outer support (2) are buried in backfill soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920500322.0U CN211143118U (en) | 2019-04-12 | 2019-04-12 | Assembled steel construction box utility tunnel underground structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920500322.0U CN211143118U (en) | 2019-04-12 | 2019-04-12 | Assembled steel construction box utility tunnel underground structure |
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| CN211143118U true CN211143118U (en) | 2020-07-31 |
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| CN201920500322.0U Active CN211143118U (en) | 2019-04-12 | 2019-04-12 | Assembled steel construction box utility tunnel underground structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206060A (en) * | 2019-04-12 | 2019-09-06 | 南京联众工程技术有限公司 | Assembling type steel structure box pipe gallery foundation pit supporting construction and construction method |
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2019
- 2019-04-12 CN CN201920500322.0U patent/CN211143118U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206060A (en) * | 2019-04-12 | 2019-09-06 | 南京联众工程技术有限公司 | Assembling type steel structure box pipe gallery foundation pit supporting construction and construction method |
| CN110206060B (en) * | 2019-04-12 | 2024-05-24 | 南京联众工程技术有限公司 | Assembled steel structure box type comprehensive pipe gallery foundation pit supporting structure and construction method |
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