CN111636905B - Connecting structure and construction method between shield tunnel and narrow existing underground space - Google Patents
Connecting structure and construction method between shield tunnel and narrow existing underground space Download PDFInfo
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- CN111636905B CN111636905B CN202010574897.4A CN202010574897A CN111636905B CN 111636905 B CN111636905 B CN 111636905B CN 202010574897 A CN202010574897 A CN 202010574897A CN 111636905 B CN111636905 B CN 111636905B
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- 238000010276 construction Methods 0.000 title claims description 34
- 239000002689 soil Substances 0.000 claims abstract description 67
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- 238000003825 pressing Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims description 88
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 238000013459 approach Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
本发明涉及一种盾构隧道与狭小既有地下空间之间的连通结构，包括：开设于地下空间的底板上的孔洞；于孔洞处打设于地下空间与盾构隧道间土体内的第一管节，在第一管节向土体内打入的过程中挖除第一管节内的土体，第一管节内部形成有第一连通空间；于孔洞处对应第一管节向下打设第二管节，第二管节的内部形成有与第一连通空间相连通的第二连通空间，在第一管节下压的过程中挖除第一管节内的土体；及设于盾构隧道的顶部并与孔洞的位置相对应的钢管片，钢管片与第一管节固定连接，且钢管片对应第一连通空间开设有连通口，通过连通口使得第一连通空间与盾构隧道相连通。本申请解决了低净空、狭小既有地下空间与盾构隧道之间无法施工连通结构的问题。
The present invention relates to a connecting structure between a shield tunnel and a narrow existing underground space, comprising: a hole opened on the bottom plate of the underground space; a first pipe section is driven into the soil between the underground space and the shield tunnel at the hole, and the soil in the first pipe section is excavated during the process of driving the first pipe section into the soil, and a first connecting space is formed inside the first pipe section; a second pipe section is driven downwardly corresponding to the first pipe section at the hole, and a second connecting space connected to the first connecting space is formed inside the second pipe section, and the soil in the first pipe section is excavated during the process of pressing the first pipe section downward; and a steel pipe segment is arranged at the top of the shield tunnel and corresponding to the position of the hole, the steel pipe segment is fixedly connected to the first pipe segment, and a connecting port is opened in the steel pipe segment corresponding to the first connecting space, and the first connecting space is connected to the shield tunnel through the connecting port. The present application solves the problem that a connecting structure cannot be constructed between a low headroom, narrow existing underground space and a shield tunnel.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a communication structure between a shield tunnel and a narrow existing underground space and a construction method.
Background
With the rapid development of urban economy and the rapid increase of urban population density in China, urban roads and track traffic are built in urban core areas under the restriction of land resources, environmental protection, natural barriers and other constraint conditions, and shield tunnel becomes the only choice gradually. The shield tunnel is generally spaced a distance apart to establish spatial communication with the ground to meet ventilation, wire arrangement, maintenance and other requirements. Because urban roads and track traffic in urban core areas are generally built later than the construction time of ground buildings, shield tunnels generally need to be penetrated down through the ground buildings, so that space is not reserved on the ground for constructing vertical connection channels between the shield tunnels and the ground. If the demolishing reconstruction method is adopted, the problem of connection between the shield tunnel and the ground space can be solved, but the existing building, urban operation and urban environment can be greatly influenced.
The basement space of the existing building has the problems of low clearance and narrow space due to no consideration of subsequent use requirements, and the problem of low clearance and narrow space in the case of downward building of the existing building is solved, so that the communication structure of the shield tunnel and the existing underground space is usually avoided at the position of the existing underground space in the aspect of low clearance and narrow space. However, in actual construction, there are often complex construction situations that the existing underground space occupies a large area and cannot be avoided or a communication structure must be constructed between the existing underground space and the shield tunnel in a low clearance or narrow state according to the design requirement of the shield tunnel.
Therefore, it is needed to provide a communication structure and a construction method for a shield tunnel and a narrow existing underground space, which can communicate the narrow existing underground space with the shield tunnel at a low clearance, so as to solve the above technical problems.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a communication structure between a shield tunnel and a narrow existing underground space and a construction method thereof, so as to solve the problem that the communication structure cannot be constructed between the existing low-clearance narrow existing underground space and the shield tunnel.
In order to achieve the above object, the present invention provides a communication structure between a shield tunnel and a narrow existing underground space, comprising:
holes arranged on the bottom plate of the underground space;
A first pipe joint arranged in the soil body between the underground space and the shield tunnel is drilled at the hole, the soil body in the first pipe joint is excavated in the process of driving the first pipe joint into the soil body, and a first communication space is formed in the first pipe joint;
A plurality of second pipe joints are downwards arranged at the positions corresponding to the first pipe joints, second communication spaces communicated with the first communication spaces are formed inside the second pipe joints, the first pipe joints are downwards pressed through the plurality of second pipe joints, the end parts of the first pipe joints are connected with the top of the shield tunnel, soil bodies in the first pipe joints are excavated in the process of downwards pressing the first pipe joints, and
The steel pipe piece is arranged at the top of the shield tunnel and corresponds to the position of the hole, the steel pipe piece is fixedly connected with the first pipe joint, the steel pipe piece corresponds to the first communication space, a communication port is formed in the steel pipe piece, and the first communication space is communicated with the shield tunnel through the communication port.
According to the invention, the holes are formed in the bottom plate of the underground space, the first pipe joint and the plurality of second pipe joints are sequentially driven into soil between the underground space and the shield tunnel at the holes, the first pipe joint and the plurality of second pipe joints are pressed down until the end parts of the first pipe joints are connected with the steel pipe sheets at the top of the shield tunnel, and the first communication space is communicated with the shield tunnel by welding and fixing the end parts of the first pipe joints with the steel pipe sheets.
The steel pipe piece includes collar tie beam and apron, collar tie beam and first tube coupling welded fastening, and first tube coupling and shield tunnel intercommunication after the apron is dismantled, second tube coupling and first tube coupling, underground space intercommunication to realized shield tunnel and underground space's intercommunication, solved low headroom, narrow and small existing underground space and the problem of unable construction communication structure between the shield tunnel.
The invention discloses a further improvement of a communication structure between a shield tunnel and a narrow existing underground space, which is characterized in that an annular ring rib is arranged on the inner wall of a first pipe joint, a plurality of reserved holes are formed in the ring rib, reinforcing steel bars are arranged in the reserved holes in a penetrating mode, and the end portions of the reinforcing steel bars are fixedly connected with the top of the shield tunnel;
And spraying concrete to the inner wall of the first pipe joint and burying and fixing the annular rib and the steel bars to form a reinforcing layer.
The invention further improves the communication structure between the shield tunnel and the narrow existing underground space, and the water stop strip is arranged at the joint of the inner wall of the first pipe joint and the shield tunnel.
The invention further improves a communication structure between a shield tunnel and a narrow existing underground space, wherein the steel pipe sheet comprises a ring beam fixedly connected with the end part of the first pipe joint and a cover plate, the ring beam is enclosed to form the communication opening, and the cover plate is detachably arranged at the communication opening.
The shield tunnel and the communication structure between the narrow existing underground space are further improved in that two adjacent second pipe joints are fixedly connected through bolts, and expansion joints with certain gaps are formed at the connecting ends.
The invention also provides a construction method for the communication structure between the shield tunnel and the narrow existing underground space, which comprises the following steps:
holes are formed in the bottom plate of the underground space;
Providing a first pipe joint, transporting the first pipe joint to the hole, pressing the first pipe joint into soil in the direction of the shield tunnel at the hole, and simultaneously digging out the soil in the first pipe joint;
Providing a second pipe joint, transporting the second pipe joint to the hole, fixedly connecting the second pipe joint with the first pipe joint when the top end of the first pipe joint approaches to the soil, and pressing down the second pipe joint to enable the second pipe joint and the first pipe joint to sink together in the soil and simultaneously excavate the soil in the first pipe joint;
When the top end of the second pipe joint approaches to the soil body, fixedly connecting the other second pipe joint with the previous second pipe joint, pressing down the second pipe joint positioned at the top end, enabling the second pipe joint and the first pipe joint to sink together in the soil body and simultaneously digging out the soil body in the first pipe joint, and pressing a plurality of second pipe joints into the soil body according to the step;
When the first pipe joint is sunk to the top of the shield tunnel, the bottom end of the first pipe joint is welded and fixed with the steel pipe sheet, and a communication port is formed in the steel pipe sheet so that the first communication space is communicated with the shield tunnel.
The invention relates to a construction method of a communication structure between a shield tunnel and a narrow existing underground space, which is further improved in that an annular ring rib is arranged on the inner wall of a first pipe joint, a plurality of reserved holes are formed in the ring rib, the end part of a reinforcing steel bar is fixedly connected with the top of the shield tunnel, and the following steps are further included after the bottom end of the first pipe joint is welded and fixed with a steel pipe sheet:
Providing reinforcing steel bars, and putting the reinforcing steel bars in the reserved holes in a penetrating way;
and spraying concrete to the inner wall of the first pipe joint and burying and fixing the annular rib and the steel bars.
The invention provides a further improvement of a construction method of a communication structure between a shield tunnel and a narrow existing underground space, which comprises the following steps after the reinforcing steel bars are arranged in the reserved holes in a penetrating way:
and providing a water stop strip, and arranging the water stop strip between the inner wall of the first pipe joint and the shield tunnel.
The invention relates to a further improvement of a construction method of a communication structure between a shield tunnel and a narrow existing underground space, which is characterized in that a hole is formed in a bottom plate of the underground space, and the construction method comprises the following steps:
providing beams and stand columns, wherein a plurality of beams are arranged on the bottom plate in a crossing manner at the positions of the areas to be opened of the holes, corresponding to the areas to be opened of the holes, so that the areas to be opened of the holes are formed in a crossing manner, stand columns are arranged at the crossing points of the beams, and holes are formed in the areas to be opened of the holes.
The invention discloses a construction method of a communication structure between a shield tunnel and a narrow existing underground space, which is further improved in that the steel pipe sheet comprises a ring beam fixedly connected with the end part of a first pipe joint and a cover plate, wherein the ring beam is enclosed to form a communication opening, the cover plate is detachably arranged at the communication opening, when the first pipe joint sinks to the top of the shield tunnel, the bottom end of the first pipe joint is welded and fixed with the steel pipe sheet, and the steel pipe sheet is provided with the communication opening to enable the first communication space to be communicated with the shield tunnel, and the construction method comprises the following steps:
and when the first pipe joint is sunk to the ring beam, welding and fixing the bottom end of the first pipe joint with the ring beam, and dismantling the cover plate on the ring beam to enable the first communication space to be communicated with the shield tunnel.
Drawings
Fig. 1 is a state diagram of the construction of a communication structure between a shield tunnel and a narrow existing underground space according to the present invention.
In the figure, a first pipe joint 1, a second pipe joint 2, cutting edges 11, steel pipe sheets 3, a shield tunnel 4, an underground space 5, a bottom plate 6, a horizontal track 7, a reaction frame 8 and an electric hoist 9.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a communication structure between a shield tunnel and a narrow existing underground space, which is used for ventilation, overhaul and wire arrangement of the shield tunnel. The invention comprises a hole, a first pipe joint, a second pipe joint and steel pipe sheets, wherein the hole is formed in the bottom plate of the underground space, the first pipe joint and a plurality of second pipe joints are sequentially driven into soil bodies between the underground space and the shield tunnel at the hole, the first pipe joint and the plurality of second pipe joints are pressed down until the end part of the first pipe joint is connected with the steel pipe sheets at the top of the shield tunnel, and the first communication space is communicated with the shield tunnel by welding and fixing the end part of the first pipe joint with the steel pipe sheets.
The construction method of the communication structure between the shield tunnel and the narrow existing underground space is described below with reference to the accompanying drawings.
Referring to fig. 1, a state diagram of the construction of the communication structure between the shield tunnel and the narrow existing underground space according to the present invention is shown. In the embodiment, the communication structure between the shield tunnel and the narrow existing underground space comprises a hole formed in a bottom plate 6 of the underground space 5, a first pipe joint 1 arranged in a soil body between the underground space 5 and the shield tunnel 4 at the hole, a plurality of second pipe joints 2 arranged at the hole and corresponding to the first pipe joint 1 downwards, and a steel pipe sheet 3 arranged at the top of the shield tunnel 4 and corresponding to the position of the hole, wherein the soil body in the first pipe joint 1 is excavated in the process of driving the first pipe joint 1 into the soil body, a first communication space is formed inside the first pipe joint 1, a second communication space communicated with the first communication space is formed inside the second pipe joint 2, the end part of the first pipe joint 1 is connected with the top of the shield tunnel 4 by pressing the first pipe joint 2 downwards, the soil body in the first pipe joint 1 is excavated in the process of pressing the first pipe joint 1, the steel pipe sheet 3 is fixedly connected with the first pipe joint 1, and the steel pipe sheet 3 corresponds to the first communication space, and the shield tunnel 4 is communicated with the first communication space.
According to the invention, the holes are formed in the bottom plate 6 of the underground space 5, the first pipe joint 1 and the plurality of second pipe joints 2 are sequentially driven into soil between the underground space 5 and the shield tunnel 4 at the holes, the first pipe joint 1 and the plurality of second pipe joints 2 are pressed down until the end part of the first pipe joint 1 is connected with the steel pipe sheet 3 at the top of the shield tunnel 4, and the first communication space is communicated with the shield tunnel 4 by welding and fixing the end part of the first pipe joint 1 and the steel pipe sheet 3, so that the shield tunnel 4 is communicated with the underground space 5 due to the second communication space being communicated with the first communication space and the underground space 5, and the problem that a communication structure cannot be constructed between the shield tunnel 4 and the existing underground space 5 with a small clearance is solved.
Further, the inner wall of the first pipe joint 1 is provided with annular ring ribs, a plurality of reserved holes are formed in the ring ribs, reinforcing steel bars are arranged in the reserved holes in a penetrating mode, the end portions of the reinforcing steel bars are fixedly connected with the top of the shield tunnel 4, concrete is sprayed to the inner wall of the first pipe joint 1, and the ring ribs and the reinforcing steel bars are buried to form a reinforcing layer. Preferably, the steel bar extends into the steel pipe sheet and is welded and fixed with the steel pipe sheet. The end of the reinforcing steel bar is fixedly connected with the top of the shield tunnel 4, and the first pipe joint 1 is connected with the shield tunnel 4 through the reinforcing layer embedded ring rib and the reinforcing steel bar to form an integral structure, so that the connection strength between the first pipe joint 1 and the shield tunnel 4 is enhanced, and the structural strength of the first pipe joint 1 is also enhanced.
Furthermore, a water stop strip is arranged at the joint of the inner wall of the first pipe joint 1 and the shield tunnel 4 and used for preventing water seepage at the joint of the first pipe joint 1 and the shield tunnel 4.
Further, the steel pipe sheet 3 comprises a ring beam fixedly connected with the end part of the first pipe joint 1 and a cover plate, the ring beam is enclosed to form a communication port, and the cover plate is detachably arranged at the communication port.
In a specific embodiment, the ring beam comprises a first top plate in a cambered surface shape, a plurality of first transverse plates and first longitudinal plates, wherein the first transverse plates and the first longitudinal plates are arranged below the first top plate in a grid shape in a transverse and longitudinal staggered mode. The cover plate comprises a cambered surface-shaped second top plate, a plurality of second transverse plates and second longitudinal plates, wherein the second transverse plates and the second longitudinal plates are arranged below the second top plate in a grid shape in a transverse and longitudinal staggered mode. The first transverse plate and the corresponding second transverse plate, the first longitudinal plate and the corresponding second longitudinal plate are detachably mounted through bolts, so that the ring beam and the cover plate are detachably mounted.
Preferably, the ring beam is enclosed to be a mouth shape by four connecting parts which are L-shaped, the cover plate is spliced to be a square shape by four installing parts which are square, the connecting parts are provided with a notch, the installing parts are matched with the notch, and the installing parts are detachably arranged on the connecting parts.
Further, two adjacent second tube coupling 2 pass through bolt fixed connection and the link is formed with the expansion joint in certain clearance, prevents that the subsidence of later stage shield tunnel 4 in the operation period from producing adverse effect to the communication structure.
Referring to fig. 1, in one embodiment, the bottom end of the first pipe section 1 is in an inward concave arc shape and is formed with a cutting edge 11, and the inward concave arc shape of the bottom end of the first pipe section 1 can be matched with the arc-shaped top surface of the shield tunnel 4, so that the bottom end of the first pipe section 1 is completely attached to and fixed to the top surface of the shield tunnel 4. The cutting feet 11 facilitate the downward pressing and soil cutting of the first pipe joint 1.
Specifically, the first pipe joint 1 adopts a steel pipe joint, so that the first pipe joint 1 is conveniently pressed down to enable the first pipe joint to sink in soil, and the second pipe joint 2 adopts a concrete pipe joint, so that the cost can be saved. The lengths of the first pipe section 1 and the second pipe section 2 are short to accommodate construction of an existing low headroom subterranean space 5. The first pipe joint 1 is fixedly connected with the second pipe joints 2 through bolts, and two adjacent second pipe joints 2 are fixedly connected through bolts.
The construction flow of the communication structure between the shield tunnel and the narrow existing underground space of the present invention will be described below.
The method comprises the steps of providing a hole at a bottom plate 6 of an underground space 5, providing a first pipe joint 1, transporting the first pipe joint 1 to the hole, pressing soil into the direction of a shield tunnel 4 at the hole and simultaneously digging out the soil in the first pipe joint 1, providing a second pipe joint 2, transporting the second pipe joint 2 to the hole, fixedly connecting the second pipe joint 2 with the first pipe joint 1 when the top end of the first pipe joint 1 approaches the soil, pressing down the second pipe joint 2 to enable the second pipe joint 2 and the first pipe joint 1 to sink together in the soil and simultaneously digging out the soil in the first pipe joint 1, fixedly connecting another second pipe joint 2 with the previous second pipe joint 2 when the top end of the second pipe joint 2 approaches the soil, pressing down the second pipe joint 2 positioned at the top end, enabling the second pipe joint 2 and the first pipe joint 1 to sink together in the soil and simultaneously digging out the soil in the first pipe joint 1, pressing down a plurality of second pipe joints 2 into the soil, enabling a plurality of second pipe joints 1 to be fixedly connected with a first pipe joint 3 when the top end of the first pipe joint 1 is sunk to the top end of the first pipe joint 4, and fixedly connecting a shield tunnel 3 with a shield tunnel 3 is formed, and a connecting port is fixedly connecting the shield tunnel 3 with the shield tunnel is formed.
Referring to fig. 1, the invention also provides a construction method for a communication structure between the shield tunnel and a narrow existing underground space, which comprises the following steps:
Holes are formed in the bottom plate 6 of the underground space 5.
The first pipe joint 1 is provided, the first pipe joint 1 is transported to a hole, soil is pressed into the direction of the shield tunnel 4 at the hole, and meanwhile the soil in the first pipe joint 1 is excavated.
Providing a second pipe joint 2, transporting the second pipe joint 2 to the hole, when the top end of the first pipe joint 1 approaches to the soil body, fixedly connecting the second pipe joint 2 with the first pipe joint 1, and pressing down the second pipe joint 2 to enable the second pipe joint 2 and the first pipe joint 1 to sink together in the soil body and simultaneously dig out the soil body in the first pipe joint 1.
When the top end of the second pipe joint 2 approaches to the soil body, the other second pipe joint 2 is fixedly connected with the previous second pipe joint 2, the second pipe joint 2 positioned at the top end is pressed down, the second pipe joint 2 and the first pipe joint 1 are made to sink together in the soil body, the soil body in the first pipe joint 1 is excavated at the same time, and a plurality of second pipe joints 2 are pressed into the soil body according to the step.
When the first pipe joint 1 sinks to the top of the shield tunnel 4, the bottom end of the first pipe joint 1 is welded and fixed with the steel pipe sheet 3, and a communication port is formed in the steel pipe sheet 3 so that the first communication space is communicated with the shield tunnel 4.
Further, the inner wall of the first pipe section 1 is provided with annular ribs, a plurality of reserved holes are formed in the annular ribs, the end parts of the reinforcing steel bars are fixedly connected with the top of the shield tunnel 4, and the steps are further included after the bottom end of the first pipe section 1 is welded and fixed with the steel pipe sheet 3:
A reinforcing bar is provided and is provided with a plurality of reinforcing bars, penetrating steel bars in the reserved holes;
Concrete is sprayed to the inner wall of the first pipe section 1 and the fixing ring ribs and the reinforcing steel bars are buried so that the inner diameter of the first pipe section 1 is equal to the inner diameter of the second pipe section 2.
Furthermore, providing the reinforcing steel bars, and after the reinforcing steel bars are penetrated in the reserved holes, further comprising the following steps:
A water stop strip is provided, and the water stop strip is arranged between the inner wall of the first pipe joint 1 and the shield tunnel 4.
Further, the steel pipe sheet 3 comprises a ring beam fixedly connected with the end part of the first pipe section 1 and a cover plate, the ring beam is enclosed to form a communication port, the cover plate is detachably arranged at the communication port, when the first pipe section 1 sinks to the top of the shield tunnel 4, the bottom end of the first pipe section 1 is welded and fixed with the steel pipe sheet 3, and the steel pipe sheet 3 is provided with the communication port to enable the first communication space to be communicated with the shield tunnel 4, and the method comprises the following steps:
When the first pipe joint 1 sinks to the ring beam, the bottom end of the first pipe joint 1 is welded and fixed with the ring beam, and the cover plate is removed from the ring beam to enable the first communication space to be communicated with the shield tunnel 4.
Further, the holes are formed in the bottom plate 6 of the underground space 5, comprising the following steps:
Before the holes are formed in the bottom plate 6, the beam column system is required to be used for reinforcing the position, which is to be punched, of the bottom plate 6, so that the structural stability of the bottom plate 6 is prevented from being influenced by the punching of the bottom plate 6. Providing beams and stand columns, arranging a plurality of beams on the bottom plate 6 in a crossing manner at the positions of the areas to be opened corresponding to the holes to form the areas to be opened of the holes, arranging the stand columns at the crossing points of the beams, and perforating the areas to be opened of the holes.
Further, before the holes are formed in the bottom plate 6 of the underground space 5, the method further comprises the following steps:
The method comprises the steps of providing a horizontal track 7, a counter-force frame 8, a jack and an electric hoist 9, installing the horizontal track 7 and the counter-force frame 8 at positions to be constructed of the corresponding communication structures on a bottom plate 6, installing the electric hoist 9 on the counter-force frame 8, and installing the jack corresponding to the counter-force frame 8. The horizontal rail 7, the counter-force frame 8, the jack and the electric hoist 9 which can be installed in the existing underground space 5 with low clearance and narrow space are adopted, the influence on the existing structure is small, the construction site is limited in the underground space 5, and no influence is caused on urban operation and urban appearance. The horizontal track 7 is used for the horizontal transportation of first pipe section 1 and second pipe section 2, and electric block 9 is used for the vertical transportation of first pipe section 1 and second pipe section 2, and reaction frame 8 and jack are used for the construction of the vertical soil body of impressing of first pipe section 1 and second pipe section 2, through adopting the mechanical sinking mode of impressing, can effective control pipe section's sinking speed and gesture. The lengths of the first pipe section 1 and the second pipe section 2 are short to accommodate construction of an existing low headroom subterranean space 5.
Furthermore, before installing the horizontal rail 7, the reaction frame 8, the jack and the electric hoist 9, the method further comprises the following steps:
A plurality of perforations are formed in the bottom plate 6, and cement slurry is injected into the soil under the bottom plate 6 at the perforations to strengthen the soil. The soil body is reinforced to 0.8-1 mpa, the structural strength of the soil body is enhanced, collapse of the soil body caused by construction of a communicating structure is avoided, and the structural stability of the existing building is ensured.
By adopting the technical scheme, the invention has the following beneficial effects:
According to the invention, the holes are formed in the bottom plate of the underground space, the first pipe joint and the plurality of second pipe joints are sequentially driven into soil between the underground space and the shield tunnel at the holes, the first pipe joint and the plurality of second pipe joints are pressed down until the end parts of the first pipe joints are connected with the steel pipe sheets at the top of the shield tunnel, and the first communication space is communicated with the shield tunnel by welding and fixing the end parts of the first pipe joints with the steel pipe sheets. The end of the reinforcing steel bar is fixedly connected with the top of the shield tunnel, and the reinforcing steel bar is buried and fixed through the reinforcing layer, so that the first pipe joint is connected with the shield tunnel to form an integral structure, and the connection strength between the first pipe joint and the shield tunnel is enhanced. The water stop strip is used for preventing water seepage at the joint of the first pipe joint and the shield tunnel. The construction method of the communication structure adopts the horizontal rail, the counter-force frame, the jack and the electric hoist which can be installed in the existing underground space with low clearance and narrow space, has small influence on the existing structure, limits the construction place in the underground space, and has no influence on urban operation and urban appearance. The lengths of the first pipe section and the second pipe section are shorter to adapt to the construction of the existing low-headroom underground space. On one hand, the structural strength of the soil body is enhanced, collapse of the soil body caused by construction of the communication structure is avoided, the structural stability of the existing building is guaranteed, and on the other hand, the first duct piece can be pressed into the soil body.
It should be noted that, the structures, proportions, sizes and the like shown in the drawings attached to the present specification are used for understanding and reading only in conjunction with the disclosure of the present specification, and are not intended to limit the applicable limitations of the present invention, so that any modification of the structures, variation of proportions or adjustment of sizes of the structures, proportions and the like should not be construed as essential to the present invention, and should still fall within the scope of the disclosure of the present invention without affecting the efficacy and achievement of the present invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
Claims (6)
1. A communication structure between shield tunnel and the existing narrow and small underground space, its characterized in that includes:
holes arranged on the bottom plate of the underground space;
A first pipe joint arranged in the soil body between the underground space and the shield tunnel is drilled at the hole, the soil body in the first pipe joint is excavated in the process of driving the first pipe joint into the soil body, and a first communication space is formed in the first pipe joint;
A plurality of second pipe joints are downwards arranged at the positions corresponding to the first pipe joints, second communication spaces communicated with the first communication spaces are formed inside the second pipe joints, the first pipe joints are downwards pressed through the plurality of second pipe joints, the end parts of the first pipe joints are connected with the top of the shield tunnel, soil bodies in the first pipe joints are excavated in the process of downwards pressing the first pipe joints, and
The steel pipe sheet is fixedly connected with the first pipe joint, a communication port is formed in the steel pipe sheet corresponding to the first communication space, and the first communication space is communicated with the shield tunnel through the communication port;
The inner wall of the first pipe joint is provided with an annular ring rib, a plurality of reserved holes are formed in the ring rib, reinforcing steel bars are arranged in the reserved holes in a penetrating mode, and the end portions of the reinforcing steel bars are fixedly connected with the top of the shield tunnel;
spraying concrete to the inner wall of the first pipe joint and burying and fixing the annular rib and the steel bars to form a reinforcing layer;
the steel pipe sheet comprises a ring beam fixedly connected with the end part of the first pipe joint and a cover plate arranged on the ring beam, the ring beam encloses to form the communication port, and the cover plate is detachably arranged at the communication port.
2. The structure according to claim 1, wherein a water stop strip is provided at a junction between the inner wall of the first pipe joint and the shield tunnel.
3. The structure according to claim 1, wherein two adjacent second pipe joints are fixedly connected by bolts, and the connecting ends form expansion joints with a certain gap.
4. A construction method of a communication structure between a shield tunnel and a narrow existing underground space, using the communication structure according to claim 2, comprising the steps of:
holes are formed in the bottom plate of the underground space;
Providing a first pipe joint, transporting the first pipe joint to the hole, pressing the first pipe joint into soil in the direction of the shield tunnel at the hole, and simultaneously digging out the soil in the first pipe joint;
Providing a second pipe joint, transporting the second pipe joint to the hole, fixedly connecting the second pipe joint with the first pipe joint when the top end of the first pipe joint approaches to the soil, and pressing down the second pipe joint to enable the second pipe joint and the first pipe joint to sink together in the soil and simultaneously excavate the soil in the first pipe joint;
When the top end of the second pipe joint approaches to the soil body, fixedly connecting the other second pipe joint with the previous second pipe joint, pressing down the second pipe joint positioned at the top end, enabling the second pipe joint and the first pipe joint to sink together in the soil body and simultaneously digging out the soil body in the first pipe joint, and pressing a plurality of second pipe joints into the soil body according to the step;
When the first pipe joint sinks to the top of the shield tunnel, the bottom end of the first pipe joint is welded and fixed with the steel pipe sheet, and a communication port is formed in the steel pipe sheet so that the first communication space is communicated with the shield tunnel;
Before the holes are formed in the bottom plate, reinforcing the holes to be formed in the bottom plate by adopting a beam column system, avoiding the holes to be formed in the bottom plate from affecting the structural stability of the bottom plate, providing beams and upright columns, arranging a plurality of beams on the bottom plate in a crossing manner at the positions of the areas to be formed corresponding to the holes, forming the areas to be formed of the holes in a crossing manner, arranging upright columns at the crossing points of the beams, and forming holes in the areas to be formed of the holes;
The inner wall of the first pipe joint is provided with annular ring ribs, a plurality of preformed holes are formed in the ring ribs, the end parts of the reinforcing steel bars are fixedly connected with the top of the shield tunnel, and the steps of welding and fixing the bottom end of the first pipe joint with the steel pipe sheet are further included:
Providing reinforcing steel bars, and putting the reinforcing steel bars in the reserved holes in a penetrating way;
spraying concrete to the inner wall of the first pipe joint and burying and fixing the annular rib and the steel bars;
The steel pipe sheet comprises a ring beam fixedly connected with the end part of the first pipe joint and a cover plate arranged on the ring beam, wherein the ring beam is enclosed to form the communication port, the cover plate is detachably arranged at the communication port, when the first pipe joint sinks to the top of the shield tunnel, the bottom end of the first pipe joint is welded and fixed with the steel pipe sheet, and the steel pipe sheet is provided with the communication port to enable the first communication space to be communicated with the shield tunnel, and the method comprises the following steps:
and when the first pipe joint is sunk to the ring beam, welding and fixing the bottom end of the first pipe joint with the ring beam, and dismantling the cover plate on the ring beam to enable the first communication space to be communicated with the shield tunnel.
5. The construction method of a communication structure between a shield tunnel and a narrow existing underground space according to claim 4, wherein a reinforcing bar is provided, and after the reinforcing bar is inserted into the reserved hole, the construction method further comprises the steps of:
and providing a water stop strip, and arranging the water stop strip between the inner wall of the first pipe joint and the shield tunnel.
6. The construction method for a communication structure between a shield tunnel and a narrow existing underground space according to claim 4, wherein a hole is formed in a bottom plate of the underground space, comprising the steps of:
providing beams and stand columns, wherein a plurality of beams are arranged on the bottom plate in a crossing manner at the positions of the areas to be opened of the holes, corresponding to the areas to be opened of the holes, so that the areas to be opened of the holes are formed in a crossing manner, stand columns are arranged at the crossing points of the beams, and holes are formed in the areas to be opened of the holes.
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| CN112145187B (en) * | 2020-09-25 | 2022-08-02 | 上海隧道工程有限公司 | Construction device and construction method for channel between existing underground space and shield tunnel |
| CN112727466A (en) * | 2021-01-29 | 2021-04-30 | 绍兴市柯桥区轨道交通集团有限公司 | Construction method for support-free prefabricated assembled type shield tunnel air shaft structure |
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| CN212508345U (en) * | 2020-06-22 | 2021-02-09 | 上海隧道工程有限公司 | Communicating structure for narrow existing underground space under shield tunnel |
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| JP4601878B2 (en) * | 2001-08-29 | 2010-12-22 | 東京都下水道サービス株式会社 | Construction method of shield tunnel and segment for opening |
| KR100442712B1 (en) * | 2001-11-10 | 2004-08-02 | 주식회사 한국엔티에스이앤씨 | Construction establishment method and the structure for underground tunnel formation |
| CN1916363A (en) * | 2006-08-07 | 2007-02-21 | 上海市隧道工程轨道交通设计研究院 | Method of suiting to bulk value of differential settlement or slippage of stratum in use for shield tunnel |
| JP2015206218A (en) * | 2014-04-22 | 2015-11-19 | 株式会社大林組 | Underground space construction method |
| CN105041349B (en) * | 2015-07-26 | 2017-07-14 | 北京工业大学 | A kind of excavating construction method that station is digged on the basis of Subway Tunnel shield tunnel |
| CN108561154B (en) * | 2018-03-30 | 2020-03-17 | 上海隧道工程有限公司 | Node structure of segment and pipe joint in shield zone connecting channel |
| CN109630155A (en) * | 2019-01-24 | 2019-04-16 | 宁波用躬科技有限公司 | A kind of top-bottom cross method for tunnel construction of different section type |
| CN110080789A (en) * | 2019-06-06 | 2019-08-02 | 周霄 | A kind of shield sky, which pushes away, spells section of jurisdiction construction |
| CN110173267B (en) * | 2019-06-06 | 2020-11-20 | 中铁一局集团第二工程有限公司 | Construction method for subway shield zone to pass through existing station |
| CN111101956A (en) * | 2019-12-26 | 2020-05-05 | 北京城建设计发展集团股份有限公司 | Secondary starting method for shield in single-hole single-line underground excavation tunnel |
| CN111271121A (en) * | 2020-02-12 | 2020-06-12 | 中铁五局集团有限公司 | Shield tunnel segment dismantling construction method |
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